1 /* Coding system handler (conversion, detection, etc).
2 Copyright (C) 2001-2014 Free Software Foundation, Inc.
3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 National Institute of Advanced Industrial Science and Technology (AIST)
6 Registration Number H14PRO021
8 National Institute of Advanced Industrial Science and Technology (AIST)
9 Registration Number H13PRO009
11 This file is part of GNU Emacs.
13 GNU Emacs is free software: you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation, either version 3 of the License, or
16 (at your option) any later version.
18 GNU Emacs is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
26 /*** TABLE OF CONTENTS ***
30 2. Emacs' internal format (emacs-utf-8) handlers
33 5. Charset-base coding systems handlers
34 6. emacs-mule (old Emacs' internal format) handlers
36 8. Shift-JIS and BIG5 handlers
38 10. C library functions
39 11. Emacs Lisp library functions
44 /*** 0. General comments ***
49 A coding system is an object for an encoding mechanism that contains
50 information about how to convert byte sequences to character
51 sequences and vice versa. When we say "decode", it means converting
52 a byte sequence of a specific coding system into a character
53 sequence that is represented by Emacs' internal coding system
54 `emacs-utf-8', and when we say "encode", it means converting a
55 character sequence of emacs-utf-8 to a byte sequence of a specific
58 In Emacs Lisp, a coding system is represented by a Lisp symbol. On
59 the C level, a coding system is represented by a vector of attributes
60 stored in the hash table Vcharset_hash_table. The conversion from
61 coding system symbol to attributes vector is done by looking up
62 Vcharset_hash_table by the symbol.
64 Coding systems are classified into the following types depending on
65 the encoding mechanism. Here's a brief description of the types.
71 o Charset-base coding system
73 A coding system defined by one or more (coded) character sets.
74 Decoding and encoding are done by a code converter defined for each
77 o Old Emacs internal format (emacs-mule)
79 The coding system adopted by old versions of Emacs (20 and 21).
81 o ISO2022-base coding system
83 The most famous coding system for multiple character sets. X's
84 Compound Text, various EUCs (Extended Unix Code), and coding systems
85 used in the Internet communication such as ISO-2022-JP are all
88 o SJIS (or Shift-JIS or MS-Kanji-Code)
90 A coding system to encode character sets: ASCII, JISX0201, and
91 JISX0208. Widely used for PC's in Japan. Details are described in
96 A coding system to encode character sets: ASCII and Big5. Widely
97 used for Chinese (mainly in Taiwan and Hong Kong). Details are
98 described in section 8. In this file, when we write "big5" (all
99 lowercase), we mean the coding system, and when we write "Big5"
100 (capitalized), we mean the character set.
104 If a user wants to decode/encode text encoded in a coding system
105 not listed above, he can supply a decoder and an encoder for it in
106 CCL (Code Conversion Language) programs. Emacs executes the CCL
107 program while decoding/encoding.
111 A coding system for text containing raw eight-bit data. Emacs
112 treats each byte of source text as a character (except for
113 end-of-line conversion).
117 Like raw text, but don't do end-of-line conversion.
122 How text end-of-line is encoded depends on operating system. For
123 instance, Unix's format is just one byte of LF (line-feed) code,
124 whereas DOS's format is two-byte sequence of `carriage-return' and
125 `line-feed' codes. MacOS's format is usually one byte of
128 Since text character encoding and end-of-line encoding are
129 independent, any coding system described above can take any format
130 of end-of-line (except for no-conversion).
134 Before using a coding system for code conversion (i.e. decoding and
135 encoding), we setup a structure of type `struct coding_system'.
136 This structure keeps various information about a specific code
137 conversion (e.g. the location of source and destination data).
144 /*** GENERAL NOTES on `detect_coding_XXX ()' functions ***
146 These functions check if a byte sequence specified as a source in
147 CODING conforms to the format of XXX, and update the members of
150 Return true if the byte sequence conforms to XXX.
152 Below is the template of these functions. */
156 detect_coding_XXX (struct coding_system
*coding
,
157 struct coding_detection_info
*detect_info
)
159 const unsigned char *src
= coding
->source
;
160 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
161 bool multibytep
= coding
->src_multibyte
;
162 ptrdiff_t consumed_chars
= 0;
168 /* Get one byte from the source. If the source is exhausted, jump
169 to no_more_source:. */
172 if (! __C_conforms_to_XXX___ (c
))
174 if (! __C_strongly_suggests_XXX__ (c
))
175 found
= CATEGORY_MASK_XXX
;
177 /* The byte sequence is invalid for XXX. */
178 detect_info
->rejected
|= CATEGORY_MASK_XXX
;
182 /* The source exhausted successfully. */
183 detect_info
->found
|= found
;
188 /*** GENERAL NOTES on `decode_coding_XXX ()' functions ***
190 These functions decode a byte sequence specified as a source by
191 CODING. The resulting multibyte text goes to a place pointed to by
192 CODING->charbuf, the length of which should not exceed
193 CODING->charbuf_size;
195 These functions set the information of original and decoded texts in
196 CODING->consumed, CODING->consumed_char, and CODING->charbuf_used.
197 They also set CODING->result to one of CODING_RESULT_XXX indicating
198 how the decoding is finished.
200 Below is the template of these functions. */
204 decode_coding_XXXX (struct coding_system
*coding
)
206 const unsigned char *src
= coding
->source
+ coding
->consumed
;
207 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
208 /* SRC_BASE remembers the start position in source in each loop.
209 The loop will be exited when there's not enough source code, or
210 when there's no room in CHARBUF for a decoded character. */
211 const unsigned char *src_base
;
212 /* A buffer to produce decoded characters. */
213 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
214 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
215 bool multibytep
= coding
->src_multibyte
;
220 if (charbuf
< charbuf_end
)
221 /* No more room to produce a decoded character. */
228 if (src_base
< src_end
229 && coding
->mode
& CODING_MODE_LAST_BLOCK
)
230 /* If the source ends by partial bytes to construct a character,
231 treat them as eight-bit raw data. */
232 while (src_base
< src_end
&& charbuf
< charbuf_end
)
233 *charbuf
++ = *src_base
++;
234 /* Remember how many bytes and characters we consumed. If the
235 source is multibyte, the bytes and chars are not identical. */
236 coding
->consumed
= coding
->consumed_char
= src_base
- coding
->source
;
237 /* Remember how many characters we produced. */
238 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
242 /*** GENERAL NOTES on `encode_coding_XXX ()' functions ***
244 These functions encode SRC_BYTES length text at SOURCE of Emacs'
245 internal multibyte format by CODING. The resulting byte sequence
246 goes to a place pointed to by DESTINATION, the length of which
247 should not exceed DST_BYTES.
249 These functions set the information of original and encoded texts in
250 the members produced, produced_char, consumed, and consumed_char of
251 the structure *CODING. They also set the member result to one of
252 CODING_RESULT_XXX indicating how the encoding finished.
254 DST_BYTES zero means that source area and destination area are
255 overlapped, which means that we can produce a encoded text until it
256 reaches at the head of not-yet-encoded source text.
258 Below is a template of these functions. */
261 encode_coding_XXX (struct coding_system
*coding
)
263 bool multibytep
= coding
->dst_multibyte
;
264 int *charbuf
= coding
->charbuf
;
265 int *charbuf_end
= charbuf
->charbuf
+ coding
->charbuf_used
;
266 unsigned char *dst
= coding
->destination
+ coding
->produced
;
267 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
268 unsigned char *adjusted_dst_end
= dst_end
- _MAX_BYTES_PRODUCED_IN_LOOP_
;
269 ptrdiff_t produced_chars
= 0;
271 for (; charbuf
< charbuf_end
&& dst
< adjusted_dst_end
; charbuf
++)
274 /* Encode C into DST, and increment DST. */
276 label_no_more_destination
:
277 /* How many chars and bytes we produced. */
278 coding
->produced_char
+= produced_chars
;
279 coding
->produced
= dst
- coding
->destination
;
284 /*** 1. Preamble ***/
291 #endif /* HAVE_WCHAR_H */
294 #include "character.h"
298 #include "composite.h"
302 #include "termhooks.h"
304 Lisp_Object Vcoding_system_hash_table
;
306 static Lisp_Object Qcoding_system
, Qeol_type
;
307 static Lisp_Object Qcoding_aliases
;
308 Lisp_Object Qunix
, Qdos
;
309 static Lisp_Object Qmac
;
310 Lisp_Object Qbuffer_file_coding_system
;
311 static Lisp_Object Qpost_read_conversion
, Qpre_write_conversion
;
312 static Lisp_Object Qdefault_char
;
313 Lisp_Object Qno_conversion
, Qundecided
;
314 Lisp_Object Qcharset
, Qutf_8
;
315 static Lisp_Object Qiso_2022
;
316 static Lisp_Object Qutf_16
, Qshift_jis
, Qbig5
;
317 static Lisp_Object Qbig
, Qlittle
;
318 static Lisp_Object Qcoding_system_history
;
319 static Lisp_Object Qvalid_codes
;
320 static Lisp_Object QCcategory
, QCmnemonic
, QCdefault_char
;
321 static Lisp_Object QCdecode_translation_table
, QCencode_translation_table
;
322 static Lisp_Object QCpost_read_conversion
, QCpre_write_conversion
;
323 static Lisp_Object QCascii_compatible_p
;
325 Lisp_Object Qcall_process
, Qcall_process_region
;
326 Lisp_Object Qstart_process
, Qopen_network_stream
;
327 static Lisp_Object Qtarget_idx
;
329 static Lisp_Object Qinsufficient_source
, Qinvalid_source
, Qinterrupted
;
331 /* If a symbol has this property, evaluate the value to define the
332 symbol as a coding system. */
333 static Lisp_Object Qcoding_system_define_form
;
335 /* Format of end-of-line decided by system. This is Qunix on
336 Unix and Mac, Qdos on DOS/Windows.
337 This has an effect only for external encoding (i.e. for output to
338 file and process), not for in-buffer or Lisp string encoding. */
339 static Lisp_Object system_eol_type
;
343 Lisp_Object Qcoding_system_p
, Qcoding_system_error
;
345 /* Coding system emacs-mule and raw-text are for converting only
346 end-of-line format. */
347 Lisp_Object Qemacs_mule
, Qraw_text
;
348 Lisp_Object Qutf_8_emacs
;
350 #if defined (WINDOWSNT) || defined (CYGWIN)
351 static Lisp_Object Qutf_16le
;
354 /* Coding-systems are handed between Emacs Lisp programs and C internal
355 routines by the following three variables. */
356 /* Coding system to be used to encode text for terminal display when
357 terminal coding system is nil. */
358 struct coding_system safe_terminal_coding
;
362 Lisp_Object Qtranslation_table
;
363 Lisp_Object Qtranslation_table_id
;
364 static Lisp_Object Qtranslation_table_for_decode
;
365 static Lisp_Object Qtranslation_table_for_encode
;
367 /* Two special coding systems. */
368 static Lisp_Object Vsjis_coding_system
;
369 static Lisp_Object Vbig5_coding_system
;
371 /* ISO2022 section */
373 #define CODING_ISO_INITIAL(coding, reg) \
374 (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \
375 coding_attr_iso_initial), \
379 #define CODING_ISO_REQUEST(coding, charset_id) \
380 (((charset_id) <= (coding)->max_charset_id \
381 ? ((coding)->safe_charsets[charset_id] != 255 \
382 ? (coding)->safe_charsets[charset_id] \
387 #define CODING_ISO_FLAGS(coding) \
388 ((coding)->spec.iso_2022.flags)
389 #define CODING_ISO_DESIGNATION(coding, reg) \
390 ((coding)->spec.iso_2022.current_designation[reg])
391 #define CODING_ISO_INVOCATION(coding, plane) \
392 ((coding)->spec.iso_2022.current_invocation[plane])
393 #define CODING_ISO_SINGLE_SHIFTING(coding) \
394 ((coding)->spec.iso_2022.single_shifting)
395 #define CODING_ISO_BOL(coding) \
396 ((coding)->spec.iso_2022.bol)
397 #define CODING_ISO_INVOKED_CHARSET(coding, plane) \
398 CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane)))
399 #define CODING_ISO_CMP_STATUS(coding) \
400 (&(coding)->spec.iso_2022.cmp_status)
401 #define CODING_ISO_EXTSEGMENT_LEN(coding) \
402 ((coding)->spec.iso_2022.ctext_extended_segment_len)
403 #define CODING_ISO_EMBEDDED_UTF_8(coding) \
404 ((coding)->spec.iso_2022.embedded_utf_8)
406 /* Control characters of ISO2022. */
407 /* code */ /* function */
408 #define ISO_CODE_SO 0x0E /* shift-out */
409 #define ISO_CODE_SI 0x0F /* shift-in */
410 #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */
411 #define ISO_CODE_ESC 0x1B /* escape */
412 #define ISO_CODE_SS2 0x8E /* single-shift-2 */
413 #define ISO_CODE_SS3 0x8F /* single-shift-3 */
414 #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */
416 /* All code (1-byte) of ISO2022 is classified into one of the
418 enum iso_code_class_type
420 ISO_control_0
, /* Control codes in the range
421 0x00..0x1F and 0x7F, except for the
422 following 5 codes. */
423 ISO_shift_out
, /* ISO_CODE_SO (0x0E) */
424 ISO_shift_in
, /* ISO_CODE_SI (0x0F) */
425 ISO_single_shift_2_7
, /* ISO_CODE_SS2_7 (0x19) */
426 ISO_escape
, /* ISO_CODE_ESC (0x1B) */
427 ISO_control_1
, /* Control codes in the range
428 0x80..0x9F, except for the
429 following 3 codes. */
430 ISO_single_shift_2
, /* ISO_CODE_SS2 (0x8E) */
431 ISO_single_shift_3
, /* ISO_CODE_SS3 (0x8F) */
432 ISO_control_sequence_introducer
, /* ISO_CODE_CSI (0x9B) */
433 ISO_0x20_or_0x7F
, /* Codes of the values 0x20 or 0x7F. */
434 ISO_graphic_plane_0
, /* Graphic codes in the range 0x21..0x7E. */
435 ISO_0xA0_or_0xFF
, /* Codes of the values 0xA0 or 0xFF. */
436 ISO_graphic_plane_1
/* Graphic codes in the range 0xA1..0xFE. */
439 /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the
440 `iso-flags' attribute of an iso2022 coding system. */
442 /* If set, produce long-form designation sequence (e.g. ESC $ ( A)
443 instead of the correct short-form sequence (e.g. ESC $ A). */
444 #define CODING_ISO_FLAG_LONG_FORM 0x0001
446 /* If set, reset graphic planes and registers at end-of-line to the
448 #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002
450 /* If set, reset graphic planes and registers before any control
451 characters to the initial state. */
452 #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004
454 /* If set, encode by 7-bit environment. */
455 #define CODING_ISO_FLAG_SEVEN_BITS 0x0008
457 /* If set, use locking-shift function. */
458 #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010
460 /* If set, use single-shift function. Overwrite
461 CODING_ISO_FLAG_LOCKING_SHIFT. */
462 #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020
464 /* If set, use designation escape sequence. */
465 #define CODING_ISO_FLAG_DESIGNATION 0x0040
467 /* If set, produce revision number sequence. */
468 #define CODING_ISO_FLAG_REVISION 0x0080
470 /* If set, produce ISO6429's direction specifying sequence. */
471 #define CODING_ISO_FLAG_DIRECTION 0x0100
473 /* If set, assume designation states are reset at beginning of line on
475 #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200
477 /* If set, designation sequence should be placed at beginning of line
479 #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400
481 /* If set, do not encode unsafe characters on output. */
482 #define CODING_ISO_FLAG_SAFE 0x0800
484 /* If set, extra latin codes (128..159) are accepted as a valid code
486 #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000
488 #define CODING_ISO_FLAG_COMPOSITION 0x2000
490 /* #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 */
492 #define CODING_ISO_FLAG_USE_ROMAN 0x8000
494 #define CODING_ISO_FLAG_USE_OLDJIS 0x10000
496 #define CODING_ISO_FLAG_LEVEL_4 0x20000
498 #define CODING_ISO_FLAG_FULL_SUPPORT 0x100000
500 /* A character to be produced on output if encoding of the original
501 character is prohibited by CODING_ISO_FLAG_SAFE. */
502 #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?'
505 #define CODING_UTF_8_BOM(coding) \
506 ((coding)->spec.utf_8_bom)
509 #define CODING_UTF_16_BOM(coding) \
510 ((coding)->spec.utf_16.bom)
512 #define CODING_UTF_16_ENDIAN(coding) \
513 ((coding)->spec.utf_16.endian)
515 #define CODING_UTF_16_SURROGATE(coding) \
516 ((coding)->spec.utf_16.surrogate)
520 #define CODING_CCL_DECODER(coding) \
521 AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder)
522 #define CODING_CCL_ENCODER(coding) \
523 AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder)
524 #define CODING_CCL_VALIDS(coding) \
525 (SDATA (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids)))
527 /* Index for each coding category in `coding_categories' */
531 coding_category_iso_7
,
532 coding_category_iso_7_tight
,
533 coding_category_iso_8_1
,
534 coding_category_iso_8_2
,
535 coding_category_iso_7_else
,
536 coding_category_iso_8_else
,
537 coding_category_utf_8_auto
,
538 coding_category_utf_8_nosig
,
539 coding_category_utf_8_sig
,
540 coding_category_utf_16_auto
,
541 coding_category_utf_16_be
,
542 coding_category_utf_16_le
,
543 coding_category_utf_16_be_nosig
,
544 coding_category_utf_16_le_nosig
,
545 coding_category_charset
,
546 coding_category_sjis
,
547 coding_category_big5
,
549 coding_category_emacs_mule
,
550 /* All above are targets of code detection. */
551 coding_category_raw_text
,
552 coding_category_undecided
,
556 /* Definitions of flag bits used in detect_coding_XXXX. */
557 #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7)
558 #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight)
559 #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1)
560 #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2)
561 #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else)
562 #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else)
563 #define CATEGORY_MASK_UTF_8_AUTO (1 << coding_category_utf_8_auto)
564 #define CATEGORY_MASK_UTF_8_NOSIG (1 << coding_category_utf_8_nosig)
565 #define CATEGORY_MASK_UTF_8_SIG (1 << coding_category_utf_8_sig)
566 #define CATEGORY_MASK_UTF_16_AUTO (1 << coding_category_utf_16_auto)
567 #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be)
568 #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le)
569 #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig)
570 #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig)
571 #define CATEGORY_MASK_CHARSET (1 << coding_category_charset)
572 #define CATEGORY_MASK_SJIS (1 << coding_category_sjis)
573 #define CATEGORY_MASK_BIG5 (1 << coding_category_big5)
574 #define CATEGORY_MASK_CCL (1 << coding_category_ccl)
575 #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule)
576 #define CATEGORY_MASK_RAW_TEXT (1 << coding_category_raw_text)
578 /* This value is returned if detect_coding_mask () find nothing other
579 than ASCII characters. */
580 #define CATEGORY_MASK_ANY \
581 (CATEGORY_MASK_ISO_7 \
582 | CATEGORY_MASK_ISO_7_TIGHT \
583 | CATEGORY_MASK_ISO_8_1 \
584 | CATEGORY_MASK_ISO_8_2 \
585 | CATEGORY_MASK_ISO_7_ELSE \
586 | CATEGORY_MASK_ISO_8_ELSE \
587 | CATEGORY_MASK_UTF_8_AUTO \
588 | CATEGORY_MASK_UTF_8_NOSIG \
589 | CATEGORY_MASK_UTF_8_SIG \
590 | CATEGORY_MASK_UTF_16_AUTO \
591 | CATEGORY_MASK_UTF_16_BE \
592 | CATEGORY_MASK_UTF_16_LE \
593 | CATEGORY_MASK_UTF_16_BE_NOSIG \
594 | CATEGORY_MASK_UTF_16_LE_NOSIG \
595 | CATEGORY_MASK_CHARSET \
596 | CATEGORY_MASK_SJIS \
597 | CATEGORY_MASK_BIG5 \
598 | CATEGORY_MASK_CCL \
599 | CATEGORY_MASK_EMACS_MULE)
602 #define CATEGORY_MASK_ISO_7BIT \
603 (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT)
605 #define CATEGORY_MASK_ISO_8BIT \
606 (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2)
608 #define CATEGORY_MASK_ISO_ELSE \
609 (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE)
611 #define CATEGORY_MASK_ISO_ESCAPE \
612 (CATEGORY_MASK_ISO_7 \
613 | CATEGORY_MASK_ISO_7_TIGHT \
614 | CATEGORY_MASK_ISO_7_ELSE \
615 | CATEGORY_MASK_ISO_8_ELSE)
617 #define CATEGORY_MASK_ISO \
618 ( CATEGORY_MASK_ISO_7BIT \
619 | CATEGORY_MASK_ISO_8BIT \
620 | CATEGORY_MASK_ISO_ELSE)
622 #define CATEGORY_MASK_UTF_16 \
623 (CATEGORY_MASK_UTF_16_AUTO \
624 | CATEGORY_MASK_UTF_16_BE \
625 | CATEGORY_MASK_UTF_16_LE \
626 | CATEGORY_MASK_UTF_16_BE_NOSIG \
627 | CATEGORY_MASK_UTF_16_LE_NOSIG)
629 #define CATEGORY_MASK_UTF_8 \
630 (CATEGORY_MASK_UTF_8_AUTO \
631 | CATEGORY_MASK_UTF_8_NOSIG \
632 | CATEGORY_MASK_UTF_8_SIG)
634 /* Table of coding categories (Lisp symbols). This variable is for
635 internal use only. */
636 static Lisp_Object Vcoding_category_table
;
638 /* Table of coding-categories ordered by priority. */
639 static enum coding_category coding_priorities
[coding_category_max
];
641 /* Nth element is a coding context for the coding system bound to the
642 Nth coding category. */
643 static struct coding_system coding_categories
[coding_category_max
];
645 /*** Commonly used macros and functions ***/
648 #define min(a, b) ((a) < (b) ? (a) : (b))
651 #define max(a, b) ((a) > (b) ? (a) : (b))
654 /* Encode a flag that can be nil, something else, or t as -1, 0, 1. */
657 encode_inhibit_flag (Lisp_Object flag
)
659 return NILP (flag
) ? -1 : EQ (flag
, Qt
);
662 /* True if the value of ENCODED_FLAG says a flag should be treated as set.
663 1 means yes, -1 means no, 0 means ask the user variable VAR. */
666 inhibit_flag (int encoded_flag
, bool var
)
668 return 0 < encoded_flag
+ var
;
671 #define CODING_GET_INFO(coding, attrs, charset_list) \
673 (attrs) = CODING_ID_ATTRS ((coding)->id); \
674 (charset_list) = CODING_ATTR_CHARSET_LIST (attrs); \
678 CHECK_NATNUM_CAR (Lisp_Object x
)
680 Lisp_Object tmp
= XCAR (x
);
686 CHECK_NATNUM_CDR (Lisp_Object x
)
688 Lisp_Object tmp
= XCDR (x
);
694 /* Safely get one byte from the source text pointed by SRC which ends
695 at SRC_END, and set C to that byte. If there are not enough bytes
696 in the source, it jumps to 'no_more_source'. If MULTIBYTEP,
697 and a multibyte character is found at SRC, set C to the
698 negative value of the character code. The caller should declare
699 and set these variables appropriately in advance:
700 src, src_end, multibytep */
702 #define ONE_MORE_BYTE(c) \
704 if (src == src_end) \
706 if (src_base < src) \
707 record_conversion_result \
708 (coding, CODING_RESULT_INSUFFICIENT_SRC); \
709 goto no_more_source; \
712 if (multibytep && (c & 0x80)) \
714 if ((c & 0xFE) == 0xC0) \
715 c = ((c & 1) << 6) | *src++; \
719 c = - string_char (src, &src, NULL); \
720 record_conversion_result \
721 (coding, CODING_RESULT_INVALID_SRC); \
727 /* Safely get two bytes from the source text pointed by SRC which ends
728 at SRC_END, and set C1 and C2 to those bytes while skipping the
729 heading multibyte characters. If there are not enough bytes in the
730 source, it jumps to 'no_more_source'. If MULTIBYTEP and
731 a multibyte character is found for C2, set C2 to the negative value
732 of the character code. The caller should declare and set these
733 variables appropriately in advance:
734 src, src_end, multibytep
735 It is intended that this macro is used in detect_coding_utf_16. */
737 #define TWO_MORE_BYTES(c1, c2) \
740 if (src == src_end) \
741 goto no_more_source; \
743 if (multibytep && (c1 & 0x80)) \
745 if ((c1 & 0xFE) == 0xC0) \
746 c1 = ((c1 & 1) << 6) | *src++; \
749 src += BYTES_BY_CHAR_HEAD (c1) - 1; \
754 if (src == src_end) \
755 goto no_more_source; \
757 if (multibytep && (c2 & 0x80)) \
759 if ((c2 & 0xFE) == 0xC0) \
760 c2 = ((c2 & 1) << 6) | *src++; \
767 /* Store a byte C in the place pointed by DST and increment DST to the
768 next free point, and increment PRODUCED_CHARS. The caller should
769 assure that C is 0..127, and declare and set the variable `dst'
770 appropriately in advance.
774 #define EMIT_ONE_ASCII_BYTE(c) \
781 /* Like EMIT_ONE_ASCII_BYTE but store two bytes; C1 and C2. */
783 #define EMIT_TWO_ASCII_BYTES(c1, c2) \
785 produced_chars += 2; \
786 *dst++ = (c1), *dst++ = (c2); \
790 /* Store a byte C in the place pointed by DST and increment DST to the
791 next free point, and increment PRODUCED_CHARS. If MULTIBYTEP,
792 store in an appropriate multibyte form. The caller should
793 declare and set the variables `dst' and `multibytep' appropriately
796 #define EMIT_ONE_BYTE(c) \
803 ch = BYTE8_TO_CHAR (ch); \
804 CHAR_STRING_ADVANCE (ch, dst); \
811 /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */
813 #define EMIT_TWO_BYTES(c1, c2) \
815 produced_chars += 2; \
822 ch = BYTE8_TO_CHAR (ch); \
823 CHAR_STRING_ADVANCE (ch, dst); \
826 ch = BYTE8_TO_CHAR (ch); \
827 CHAR_STRING_ADVANCE (ch, dst); \
837 #define EMIT_THREE_BYTES(c1, c2, c3) \
839 EMIT_ONE_BYTE (c1); \
840 EMIT_TWO_BYTES (c2, c3); \
844 #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \
846 EMIT_TWO_BYTES (c1, c2); \
847 EMIT_TWO_BYTES (c3, c4); \
852 record_conversion_result (struct coding_system
*coding
,
853 enum coding_result_code result
)
855 coding
->result
= result
;
858 case CODING_RESULT_INSUFFICIENT_SRC
:
859 Vlast_code_conversion_error
= Qinsufficient_source
;
861 case CODING_RESULT_INVALID_SRC
:
862 Vlast_code_conversion_error
= Qinvalid_source
;
864 case CODING_RESULT_INTERRUPT
:
865 Vlast_code_conversion_error
= Qinterrupted
;
867 case CODING_RESULT_INSUFFICIENT_DST
:
868 /* Don't record this error in Vlast_code_conversion_error
869 because it happens just temporarily and is resolved when the
870 whole conversion is finished. */
872 case CODING_RESULT_SUCCESS
:
875 Vlast_code_conversion_error
= intern ("Unknown error");
879 /* These wrapper macros are used to preserve validity of pointers into
880 buffer text across calls to decode_char, encode_char, etc, which
881 could cause relocation of buffers if it loads a charset map,
882 because loading a charset map allocates large structures. */
884 #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \
888 charset_map_loaded = 0; \
889 c = DECODE_CHAR (charset, code); \
890 if (charset_map_loaded \
891 && (offset = coding_change_source (coding))) \
894 src_base += offset; \
899 #define CODING_ENCODE_CHAR(coding, dst, dst_end, charset, c, code) \
903 charset_map_loaded = 0; \
904 code = ENCODE_CHAR (charset, c); \
905 if (charset_map_loaded \
906 && (offset = coding_change_destination (coding))) \
913 #define CODING_CHAR_CHARSET(coding, dst, dst_end, c, charset_list, code_return, charset) \
917 charset_map_loaded = 0; \
918 charset = char_charset (c, charset_list, code_return); \
919 if (charset_map_loaded \
920 && (offset = coding_change_destination (coding))) \
927 #define CODING_CHAR_CHARSET_P(coding, dst, dst_end, c, charset, result) \
931 charset_map_loaded = 0; \
932 result = CHAR_CHARSET_P (c, charset); \
933 if (charset_map_loaded \
934 && (offset = coding_change_destination (coding))) \
942 /* If there are at least BYTES length of room at dst, allocate memory
943 for coding->destination and update dst and dst_end. We don't have
944 to take care of coding->source which will be relocated. It is
945 handled by calling coding_set_source in encode_coding. */
947 #define ASSURE_DESTINATION(bytes) \
949 if (dst + (bytes) >= dst_end) \
951 ptrdiff_t more_bytes = charbuf_end - charbuf + (bytes); \
953 dst = alloc_destination (coding, more_bytes, dst); \
954 dst_end = coding->destination + coding->dst_bytes; \
959 /* Store multibyte form of the character C in P, and advance P to the
960 end of the multibyte form. This used to be like CHAR_STRING_ADVANCE
961 without ever calling MAYBE_UNIFY_CHAR, but nowadays we don't call
962 MAYBE_UNIFY_CHAR in CHAR_STRING_ADVANCE. */
964 #define CHAR_STRING_ADVANCE_NO_UNIFY(c, p) CHAR_STRING_ADVANCE(c, p)
966 /* Return the character code of character whose multibyte form is at
967 P, and advance P to the end of the multibyte form. This used to be
968 like STRING_CHAR_ADVANCE without ever calling MAYBE_UNIFY_CHAR, but
969 nowadays STRING_CHAR_ADVANCE doesn't call MAYBE_UNIFY_CHAR. */
971 #define STRING_CHAR_ADVANCE_NO_UNIFY(p) STRING_CHAR_ADVANCE(p)
973 /* Set coding->source from coding->src_object. */
976 coding_set_source (struct coding_system
*coding
)
978 if (BUFFERP (coding
->src_object
))
980 struct buffer
*buf
= XBUFFER (coding
->src_object
);
982 if (coding
->src_pos
< 0)
983 coding
->source
= BUF_GAP_END_ADDR (buf
) + coding
->src_pos_byte
;
985 coding
->source
= BUF_BYTE_ADDRESS (buf
, coding
->src_pos_byte
);
987 else if (STRINGP (coding
->src_object
))
989 coding
->source
= SDATA (coding
->src_object
) + coding
->src_pos_byte
;
993 /* Otherwise, the source is C string and is never relocated
994 automatically. Thus we don't have to update anything. */
999 /* Set coding->source from coding->src_object, and return how many
1000 bytes coding->source was changed. */
1003 coding_change_source (struct coding_system
*coding
)
1005 const unsigned char *orig
= coding
->source
;
1006 coding_set_source (coding
);
1007 return coding
->source
- orig
;
1011 /* Set coding->destination from coding->dst_object. */
1014 coding_set_destination (struct coding_system
*coding
)
1016 if (BUFFERP (coding
->dst_object
))
1018 if (BUFFERP (coding
->src_object
) && coding
->src_pos
< 0)
1020 coding
->destination
= BEG_ADDR
+ coding
->dst_pos_byte
- BEG_BYTE
;
1021 coding
->dst_bytes
= (GAP_END_ADDR
1022 - (coding
->src_bytes
- coding
->consumed
)
1023 - coding
->destination
);
1027 /* We are sure that coding->dst_pos_byte is before the gap
1029 coding
->destination
= (BUF_BEG_ADDR (XBUFFER (coding
->dst_object
))
1030 + coding
->dst_pos_byte
- BEG_BYTE
);
1031 coding
->dst_bytes
= (BUF_GAP_END_ADDR (XBUFFER (coding
->dst_object
))
1032 - coding
->destination
);
1037 /* Otherwise, the destination is C string and is never relocated
1038 automatically. Thus we don't have to update anything. */
1043 /* Set coding->destination from coding->dst_object, and return how
1044 many bytes coding->destination was changed. */
1047 coding_change_destination (struct coding_system
*coding
)
1049 const unsigned char *orig
= coding
->destination
;
1050 coding_set_destination (coding
);
1051 return coding
->destination
- orig
;
1056 coding_alloc_by_realloc (struct coding_system
*coding
, ptrdiff_t bytes
)
1058 if (STRING_BYTES_BOUND
- coding
->dst_bytes
< bytes
)
1060 coding
->destination
= xrealloc (coding
->destination
,
1061 coding
->dst_bytes
+ bytes
);
1062 coding
->dst_bytes
+= bytes
;
1066 coding_alloc_by_making_gap (struct coding_system
*coding
,
1067 ptrdiff_t gap_head_used
, ptrdiff_t bytes
)
1069 if (EQ (coding
->src_object
, coding
->dst_object
))
1071 /* The gap may contain the produced data at the head and not-yet
1072 consumed data at the tail. To preserve those data, we at
1073 first make the gap size to zero, then increase the gap
1075 ptrdiff_t add
= GAP_SIZE
;
1077 GPT
+= gap_head_used
, GPT_BYTE
+= gap_head_used
;
1078 GAP_SIZE
= 0; ZV
+= add
; Z
+= add
; ZV_BYTE
+= add
; Z_BYTE
+= add
;
1080 GAP_SIZE
+= add
; ZV
-= add
; Z
-= add
; ZV_BYTE
-= add
; Z_BYTE
-= add
;
1081 GPT
-= gap_head_used
, GPT_BYTE
-= gap_head_used
;
1084 make_gap_1 (XBUFFER (coding
->dst_object
), bytes
);
1088 static unsigned char *
1089 alloc_destination (struct coding_system
*coding
, ptrdiff_t nbytes
,
1092 ptrdiff_t offset
= dst
- coding
->destination
;
1094 if (BUFFERP (coding
->dst_object
))
1096 struct buffer
*buf
= XBUFFER (coding
->dst_object
);
1098 coding_alloc_by_making_gap (coding
, dst
- BUF_GPT_ADDR (buf
), nbytes
);
1101 coding_alloc_by_realloc (coding
, nbytes
);
1102 coding_set_destination (coding
);
1103 dst
= coding
->destination
+ offset
;
1107 /** Macros for annotations. */
1109 /* An annotation data is stored in the array coding->charbuf in this
1111 [ -LENGTH ANNOTATION_MASK NCHARS ... ]
1112 LENGTH is the number of elements in the annotation.
1113 ANNOTATION_MASK is one of CODING_ANNOTATE_XXX_MASK.
1114 NCHARS is the number of characters in the text annotated.
1116 The format of the following elements depend on ANNOTATION_MASK.
1118 In the case of CODING_ANNOTATE_COMPOSITION_MASK, these elements
1120 ... NBYTES METHOD [ COMPOSITION-COMPONENTS ... ]
1122 NBYTES is the number of bytes specified in the header part of
1123 old-style emacs-mule encoding, or 0 for the other kind of
1126 METHOD is one of enum composition_method.
1128 Optional COMPOSITION-COMPONENTS are characters and composition
1131 In the case of CODING_ANNOTATE_CHARSET_MASK, one element CHARSET-ID
1134 If ANNOTATION_MASK is 0, this annotation is just a space holder to
1135 recover from an invalid annotation, and should be skipped by
1136 produce_annotation. */
1138 /* Maximum length of the header of annotation data. */
1139 #define MAX_ANNOTATION_LENGTH 5
1141 #define ADD_ANNOTATION_DATA(buf, len, mask, nchars) \
1143 *(buf)++ = -(len); \
1144 *(buf)++ = (mask); \
1145 *(buf)++ = (nchars); \
1146 coding->annotated = 1; \
1149 #define ADD_COMPOSITION_DATA(buf, nchars, nbytes, method) \
1151 ADD_ANNOTATION_DATA (buf, 5, CODING_ANNOTATE_COMPOSITION_MASK, nchars); \
1157 #define ADD_CHARSET_DATA(buf, nchars, id) \
1159 ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_CHARSET_MASK, nchars); \
1164 /* Bitmasks for coding->eol_seen. */
1166 #define EOL_SEEN_NONE 0
1167 #define EOL_SEEN_LF 1
1168 #define EOL_SEEN_CR 2
1169 #define EOL_SEEN_CRLF 4
1172 /*** 2. Emacs' internal format (emacs-utf-8) ***/
1179 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1180 Return true if a text is encoded in UTF-8. */
1182 #define UTF_8_1_OCTET_P(c) ((c) < 0x80)
1183 #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80)
1184 #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0)
1185 #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0)
1186 #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0)
1187 #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8)
1189 #define UTF_8_BOM_1 0xEF
1190 #define UTF_8_BOM_2 0xBB
1191 #define UTF_8_BOM_3 0xBF
1193 /* Unlike the other detect_coding_XXX, this function counts number of
1194 characters and check EOL format. */
1197 detect_coding_utf_8 (struct coding_system
*coding
,
1198 struct coding_detection_info
*detect_info
)
1200 const unsigned char *src
= coding
->source
, *src_base
;
1201 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1202 bool multibytep
= coding
->src_multibyte
;
1203 ptrdiff_t consumed_chars
= 0;
1205 ptrdiff_t nchars
= coding
->head_ascii
;
1206 int eol_seen
= coding
->eol_seen
;
1208 detect_info
->checked
|= CATEGORY_MASK_UTF_8
;
1209 /* A coding system of this category is always ASCII compatible. */
1212 if (src
== coding
->source
/* BOM should be at the head. */
1213 && src
+ 3 < src_end
/* BOM is 3-byte long. */
1214 && src
[0] == UTF_8_BOM_1
1215 && src
[1] == UTF_8_BOM_2
1216 && src
[2] == UTF_8_BOM_3
)
1225 int c
, c1
, c2
, c3
, c4
;
1229 if (c
< 0 || UTF_8_1_OCTET_P (c
))
1234 if (src
< src_end
&& *src
== '\n')
1236 eol_seen
|= EOL_SEEN_CRLF
;
1241 eol_seen
|= EOL_SEEN_CR
;
1244 eol_seen
|= EOL_SEEN_LF
;
1248 if (c1
< 0 || ! UTF_8_EXTRA_OCTET_P (c1
))
1250 if (UTF_8_2_OCTET_LEADING_P (c
))
1256 if (c2
< 0 || ! UTF_8_EXTRA_OCTET_P (c2
))
1258 if (UTF_8_3_OCTET_LEADING_P (c
))
1264 if (c3
< 0 || ! UTF_8_EXTRA_OCTET_P (c3
))
1266 if (UTF_8_4_OCTET_LEADING_P (c
))
1272 if (c4
< 0 || ! UTF_8_EXTRA_OCTET_P (c4
))
1274 if (UTF_8_5_OCTET_LEADING_P (c
))
1281 detect_info
->rejected
|= CATEGORY_MASK_UTF_8
;
1285 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
1287 detect_info
->rejected
|= CATEGORY_MASK_UTF_8
;
1292 /* The first character 0xFFFE doesn't necessarily mean a BOM. */
1293 detect_info
->found
|= CATEGORY_MASK_UTF_8_AUTO
| CATEGORY_MASK_UTF_8_SIG
| CATEGORY_MASK_UTF_8_NOSIG
;
1297 detect_info
->rejected
|= CATEGORY_MASK_UTF_8_SIG
;
1298 if (nchars
< src_end
- coding
->source
)
1299 /* The found characters are less than source bytes, which
1300 means that we found a valid non-ASCII characters. */
1301 detect_info
->found
|= CATEGORY_MASK_UTF_8_AUTO
| CATEGORY_MASK_UTF_8_NOSIG
;
1303 coding
->detected_utf8_bytes
= src_base
- coding
->source
;
1304 coding
->detected_utf8_chars
= nchars
;
1310 decode_coding_utf_8 (struct coding_system
*coding
)
1312 const unsigned char *src
= coding
->source
+ coding
->consumed
;
1313 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1314 const unsigned char *src_base
;
1315 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
1316 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
1317 ptrdiff_t consumed_chars
= 0, consumed_chars_base
= 0;
1318 bool multibytep
= coding
->src_multibyte
;
1319 enum utf_bom_type bom
= CODING_UTF_8_BOM (coding
);
1321 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
1322 int byte_after_cr
= -1;
1324 if (bom
!= utf_without_bom
)
1330 if (! UTF_8_3_OCTET_LEADING_P (c1
))
1335 if (! UTF_8_EXTRA_OCTET_P (c2
))
1340 if (! UTF_8_EXTRA_OCTET_P (c3
))
1344 if ((c1
!= UTF_8_BOM_1
)
1345 || (c2
!= UTF_8_BOM_2
) || (c3
!= UTF_8_BOM_3
))
1348 CODING_UTF_8_BOM (coding
) = utf_without_bom
;
1353 CODING_UTF_8_BOM (coding
) = utf_without_bom
;
1357 int c
, c1
, c2
, c3
, c4
, c5
;
1360 consumed_chars_base
= consumed_chars
;
1362 if (charbuf
>= charbuf_end
)
1364 if (byte_after_cr
>= 0)
1369 /* In the simple case, rapidly handle ordinary characters */
1370 if (multibytep
&& ! eol_dos
1371 && charbuf
< charbuf_end
- 6 && src
< src_end
- 6)
1373 while (charbuf
< charbuf_end
- 6 && src
< src_end
- 6)
1403 /* If we handled at least one character, restart the main loop. */
1404 if (src
!= src_base
)
1408 if (byte_after_cr
>= 0)
1409 c1
= byte_after_cr
, byte_after_cr
= -1;
1416 else if (UTF_8_1_OCTET_P (c1
))
1418 if (eol_dos
&& c1
== '\r')
1419 ONE_MORE_BYTE (byte_after_cr
);
1425 if (c2
< 0 || ! UTF_8_EXTRA_OCTET_P (c2
))
1427 if (UTF_8_2_OCTET_LEADING_P (c1
))
1429 c
= ((c1
& 0x1F) << 6) | (c2
& 0x3F);
1430 /* Reject overlong sequences here and below. Encoders
1431 producing them are incorrect, they can be misleading,
1432 and they mess up read/write invariance. */
1439 if (c3
< 0 || ! UTF_8_EXTRA_OCTET_P (c3
))
1441 if (UTF_8_3_OCTET_LEADING_P (c1
))
1443 c
= (((c1
& 0xF) << 12)
1444 | ((c2
& 0x3F) << 6) | (c3
& 0x3F));
1446 || (c
>= 0xd800 && c
< 0xe000)) /* surrogates (invalid) */
1452 if (c4
< 0 || ! UTF_8_EXTRA_OCTET_P (c4
))
1454 if (UTF_8_4_OCTET_LEADING_P (c1
))
1456 c
= (((c1
& 0x7) << 18) | ((c2
& 0x3F) << 12)
1457 | ((c3
& 0x3F) << 6) | (c4
& 0x3F));
1464 if (c5
< 0 || ! UTF_8_EXTRA_OCTET_P (c5
))
1466 if (UTF_8_5_OCTET_LEADING_P (c1
))
1468 c
= (((c1
& 0x3) << 24) | ((c2
& 0x3F) << 18)
1469 | ((c3
& 0x3F) << 12) | ((c4
& 0x3F) << 6)
1471 if ((c
> MAX_CHAR
) || (c
< 0x200000))
1486 consumed_chars
= consumed_chars_base
;
1488 *charbuf
++ = ASCII_CHAR_P (c
) ? c
: BYTE8_TO_CHAR (c
);
1493 coding
->consumed_char
+= consumed_chars_base
;
1494 coding
->consumed
= src_base
- coding
->source
;
1495 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
1500 encode_coding_utf_8 (struct coding_system
*coding
)
1502 bool multibytep
= coding
->dst_multibyte
;
1503 int *charbuf
= coding
->charbuf
;
1504 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
1505 unsigned char *dst
= coding
->destination
+ coding
->produced
;
1506 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
1507 ptrdiff_t produced_chars
= 0;
1510 if (CODING_UTF_8_BOM (coding
) == utf_with_bom
)
1512 ASSURE_DESTINATION (3);
1513 EMIT_THREE_BYTES (UTF_8_BOM_1
, UTF_8_BOM_2
, UTF_8_BOM_3
);
1514 CODING_UTF_8_BOM (coding
) = utf_without_bom
;
1519 int safe_room
= MAX_MULTIBYTE_LENGTH
* 2;
1521 while (charbuf
< charbuf_end
)
1523 unsigned char str
[MAX_MULTIBYTE_LENGTH
], *p
, *pend
= str
;
1525 ASSURE_DESTINATION (safe_room
);
1527 if (CHAR_BYTE8_P (c
))
1529 c
= CHAR_TO_BYTE8 (c
);
1534 CHAR_STRING_ADVANCE_NO_UNIFY (c
, pend
);
1535 for (p
= str
; p
< pend
; p
++)
1542 int safe_room
= MAX_MULTIBYTE_LENGTH
;
1544 while (charbuf
< charbuf_end
)
1546 ASSURE_DESTINATION (safe_room
);
1548 if (CHAR_BYTE8_P (c
))
1549 *dst
++ = CHAR_TO_BYTE8 (c
);
1551 CHAR_STRING_ADVANCE_NO_UNIFY (c
, dst
);
1553 produced_chars
= dst
- (coding
->destination
+ coding
->produced
);
1555 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
1556 coding
->produced_char
+= produced_chars
;
1557 coding
->produced
= dst
- coding
->destination
;
1562 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1563 Return true if a text is encoded in one of UTF-16 based coding systems. */
1565 #define UTF_16_HIGH_SURROGATE_P(val) \
1566 (((val) & 0xFC00) == 0xD800)
1568 #define UTF_16_LOW_SURROGATE_P(val) \
1569 (((val) & 0xFC00) == 0xDC00)
1573 detect_coding_utf_16 (struct coding_system
*coding
,
1574 struct coding_detection_info
*detect_info
)
1576 const unsigned char *src
= coding
->source
;
1577 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1578 bool multibytep
= coding
->src_multibyte
;
1581 detect_info
->checked
|= CATEGORY_MASK_UTF_16
;
1582 if (coding
->mode
& CODING_MODE_LAST_BLOCK
1583 && (coding
->src_chars
& 1))
1585 detect_info
->rejected
|= CATEGORY_MASK_UTF_16
;
1589 TWO_MORE_BYTES (c1
, c2
);
1590 if ((c1
== 0xFF) && (c2
== 0xFE))
1592 detect_info
->found
|= (CATEGORY_MASK_UTF_16_LE
1593 | CATEGORY_MASK_UTF_16_AUTO
);
1594 detect_info
->rejected
|= (CATEGORY_MASK_UTF_16_BE
1595 | CATEGORY_MASK_UTF_16_BE_NOSIG
1596 | CATEGORY_MASK_UTF_16_LE_NOSIG
);
1598 else if ((c1
== 0xFE) && (c2
== 0xFF))
1600 detect_info
->found
|= (CATEGORY_MASK_UTF_16_BE
1601 | CATEGORY_MASK_UTF_16_AUTO
);
1602 detect_info
->rejected
|= (CATEGORY_MASK_UTF_16_LE
1603 | CATEGORY_MASK_UTF_16_BE_NOSIG
1604 | CATEGORY_MASK_UTF_16_LE_NOSIG
);
1608 detect_info
->rejected
|= CATEGORY_MASK_UTF_16
;
1613 /* We check the dispersion of Eth and Oth bytes where E is even and
1614 O is odd. If both are high, we assume binary data.*/
1615 unsigned char e
[256], o
[256];
1616 unsigned e_num
= 1, o_num
= 1;
1623 detect_info
->rejected
|= (CATEGORY_MASK_UTF_16_AUTO
1624 |CATEGORY_MASK_UTF_16_BE
1625 | CATEGORY_MASK_UTF_16_LE
);
1627 while ((detect_info
->rejected
& CATEGORY_MASK_UTF_16
)
1628 != CATEGORY_MASK_UTF_16
)
1630 TWO_MORE_BYTES (c1
, c2
);
1638 detect_info
->rejected
|= CATEGORY_MASK_UTF_16_BE_NOSIG
;
1645 detect_info
->rejected
|= CATEGORY_MASK_UTF_16_LE_NOSIG
;
1656 decode_coding_utf_16 (struct coding_system
*coding
)
1658 const unsigned char *src
= coding
->source
+ coding
->consumed
;
1659 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1660 const unsigned char *src_base
;
1661 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
1662 /* We may produces at most 3 chars in one loop. */
1663 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
- 2;
1664 ptrdiff_t consumed_chars
= 0, consumed_chars_base
= 0;
1665 bool multibytep
= coding
->src_multibyte
;
1666 enum utf_bom_type bom
= CODING_UTF_16_BOM (coding
);
1667 enum utf_16_endian_type endian
= CODING_UTF_16_ENDIAN (coding
);
1668 int surrogate
= CODING_UTF_16_SURROGATE (coding
);
1670 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
1671 int byte_after_cr1
= -1, byte_after_cr2
= -1;
1673 if (bom
== utf_with_bom
)
1682 if (endian
== utf_16_big_endian
1683 ? c
!= 0xFEFF : c
!= 0xFFFE)
1685 /* The first two bytes are not BOM. Treat them as bytes
1686 for a normal character. */
1690 CODING_UTF_16_BOM (coding
) = utf_without_bom
;
1692 else if (bom
== utf_detect_bom
)
1694 /* We have already tried to detect BOM and failed in
1696 CODING_UTF_16_BOM (coding
) = utf_without_bom
;
1704 consumed_chars_base
= consumed_chars
;
1706 if (charbuf
>= charbuf_end
)
1708 if (byte_after_cr1
>= 0)
1713 if (byte_after_cr1
>= 0)
1714 c1
= byte_after_cr1
, byte_after_cr1
= -1;
1722 if (byte_after_cr2
>= 0)
1723 c2
= byte_after_cr2
, byte_after_cr2
= -1;
1728 *charbuf
++ = ASCII_CHAR_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
1732 c
= (endian
== utf_16_big_endian
1733 ? ((c1
<< 8) | c2
) : ((c2
<< 8) | c1
));
1737 if (! UTF_16_LOW_SURROGATE_P (c
))
1739 if (endian
== utf_16_big_endian
)
1740 c1
= surrogate
>> 8, c2
= surrogate
& 0xFF;
1742 c1
= surrogate
& 0xFF, c2
= surrogate
>> 8;
1746 if (UTF_16_HIGH_SURROGATE_P (c
))
1747 CODING_UTF_16_SURROGATE (coding
) = surrogate
= c
;
1753 c
= ((surrogate
- 0xD800) << 10) | (c
- 0xDC00);
1754 CODING_UTF_16_SURROGATE (coding
) = surrogate
= 0;
1755 *charbuf
++ = 0x10000 + c
;
1760 if (UTF_16_HIGH_SURROGATE_P (c
))
1761 CODING_UTF_16_SURROGATE (coding
) = surrogate
= c
;
1764 if (eol_dos
&& c
== '\r')
1766 ONE_MORE_BYTE (byte_after_cr1
);
1767 ONE_MORE_BYTE (byte_after_cr2
);
1775 coding
->consumed_char
+= consumed_chars_base
;
1776 coding
->consumed
= src_base
- coding
->source
;
1777 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
1781 encode_coding_utf_16 (struct coding_system
*coding
)
1783 bool multibytep
= coding
->dst_multibyte
;
1784 int *charbuf
= coding
->charbuf
;
1785 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
1786 unsigned char *dst
= coding
->destination
+ coding
->produced
;
1787 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
1789 enum utf_bom_type bom
= CODING_UTF_16_BOM (coding
);
1790 bool big_endian
= CODING_UTF_16_ENDIAN (coding
) == utf_16_big_endian
;
1791 ptrdiff_t produced_chars
= 0;
1794 if (bom
!= utf_without_bom
)
1796 ASSURE_DESTINATION (safe_room
);
1798 EMIT_TWO_BYTES (0xFE, 0xFF);
1800 EMIT_TWO_BYTES (0xFF, 0xFE);
1801 CODING_UTF_16_BOM (coding
) = utf_without_bom
;
1804 while (charbuf
< charbuf_end
)
1806 ASSURE_DESTINATION (safe_room
);
1808 if (c
> MAX_UNICODE_CHAR
)
1809 c
= coding
->default_char
;
1814 EMIT_TWO_BYTES (c
>> 8, c
& 0xFF);
1816 EMIT_TWO_BYTES (c
& 0xFF, c
>> 8);
1823 c1
= (c
>> 10) + 0xD800;
1824 c2
= (c
& 0x3FF) + 0xDC00;
1826 EMIT_FOUR_BYTES (c1
>> 8, c1
& 0xFF, c2
>> 8, c2
& 0xFF);
1828 EMIT_FOUR_BYTES (c1
& 0xFF, c1
>> 8, c2
& 0xFF, c2
>> 8);
1831 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
1832 coding
->produced
= dst
- coding
->destination
;
1833 coding
->produced_char
+= produced_chars
;
1838 /*** 6. Old Emacs' internal format (emacs-mule) ***/
1840 /* Emacs' internal format for representation of multiple character
1841 sets is a kind of multi-byte encoding, i.e. characters are
1842 represented by variable-length sequences of one-byte codes.
1844 ASCII characters and control characters (e.g. `tab', `newline') are
1845 represented by one-byte sequences which are their ASCII codes, in
1846 the range 0x00 through 0x7F.
1848 8-bit characters of the range 0x80..0x9F are represented by
1849 two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit
1852 8-bit characters of the range 0xA0..0xFF are represented by
1853 one-byte sequences which are their 8-bit code.
1855 The other characters are represented by a sequence of `base
1856 leading-code', optional `extended leading-code', and one or two
1857 `position-code's. The length of the sequence is determined by the
1858 base leading-code. Leading-code takes the range 0x81 through 0x9D,
1859 whereas extended leading-code and position-code take the range 0xA0
1860 through 0xFF. See `charset.h' for more details about leading-code
1863 --- CODE RANGE of Emacs' internal format ---
1867 eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF
1868 eight-bit-graphic 0xA0..0xBF
1869 ELSE 0x81..0x9D + [0xA0..0xFF]+
1870 ---------------------------------------------
1872 As this is the internal character representation, the format is
1873 usually not used externally (i.e. in a file or in a data sent to a
1874 process). But, it is possible to have a text externally in this
1875 format (i.e. by encoding by the coding system `emacs-mule').
1877 In that case, a sequence of one-byte codes has a slightly different
1880 At first, all characters in eight-bit-control are represented by
1881 one-byte sequences which are their 8-bit code.
1883 Next, character composition data are represented by the byte
1884 sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ...,
1886 METHOD is 0xF2 plus one of composition method (enum
1887 composition_method),
1889 BYTES is 0xA0 plus a byte length of this composition data,
1891 CHARS is 0xA0 plus a number of characters composed by this
1894 COMPONENTs are characters of multibyte form or composition
1895 rules encoded by two-byte of ASCII codes.
1897 In addition, for backward compatibility, the following formats are
1898 also recognized as composition data on decoding.
1901 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ
1904 MSEQ is a multibyte form but in these special format:
1905 ASCII: 0xA0 ASCII_CODE+0x80,
1906 other: LEADING_CODE+0x20 FOLLOWING-BYTE ...,
1907 RULE is a one byte code of the range 0xA0..0xF0 that
1908 represents a composition rule.
1911 char emacs_mule_bytes
[256];
1914 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1915 Return true if a text is encoded in 'emacs-mule'. */
1918 detect_coding_emacs_mule (struct coding_system
*coding
,
1919 struct coding_detection_info
*detect_info
)
1921 const unsigned char *src
= coding
->source
, *src_base
;
1922 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1923 bool multibytep
= coding
->src_multibyte
;
1924 ptrdiff_t consumed_chars
= 0;
1928 detect_info
->checked
|= CATEGORY_MASK_EMACS_MULE
;
1929 /* A coding system of this category is always ASCII compatible. */
1930 src
+= coding
->head_ascii
;
1940 /* Perhaps the start of composite character. We simply skip
1941 it because analyzing it is too heavy for detecting. But,
1942 at least, we check that the composite character
1943 constitutes of more than 4 bytes. */
1944 const unsigned char *src_start
;
1954 if (src
- src_start
<= 4)
1956 found
= CATEGORY_MASK_EMACS_MULE
;
1964 && (c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
))
1969 int more_bytes
= emacs_mule_bytes
[c
] - 1;
1971 while (more_bytes
> 0)
1976 src
--; /* Unread the last byte. */
1981 if (more_bytes
!= 0)
1983 found
= CATEGORY_MASK_EMACS_MULE
;
1986 detect_info
->rejected
|= CATEGORY_MASK_EMACS_MULE
;
1990 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
1992 detect_info
->rejected
|= CATEGORY_MASK_EMACS_MULE
;
1995 detect_info
->found
|= found
;
2000 /* Parse emacs-mule multibyte sequence at SRC and return the decoded
2001 character. If CMP_STATUS indicates that we must expect MSEQ or
2002 RULE described above, decode it and return the negative value of
2003 the decoded character or rule. If an invalid byte is found, return
2004 -1. If SRC is too short, return -2. */
2007 emacs_mule_char (struct coding_system
*coding
, const unsigned char *src
,
2008 int *nbytes
, int *nchars
, int *id
,
2009 struct composition_status
*cmp_status
)
2011 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
2012 const unsigned char *src_base
= src
;
2013 bool multibytep
= coding
->src_multibyte
;
2017 ptrdiff_t consumed_chars
= 0;
2018 bool mseq_found
= 0;
2024 charset_ID
= emacs_mule_charset
[0];
2030 if (cmp_status
->state
!= COMPOSING_NO
2031 && cmp_status
->old_form
)
2033 if (cmp_status
->state
== COMPOSING_CHAR
)
2048 *nbytes
= src
- src_base
;
2049 *nchars
= consumed_chars
;
2057 switch (emacs_mule_bytes
[c
])
2060 if ((charset_ID
= emacs_mule_charset
[c
]) < 0)
2069 if (c
== EMACS_MULE_LEADING_CODE_PRIVATE_11
2070 || c
== EMACS_MULE_LEADING_CODE_PRIVATE_12
)
2073 if (c
< 0xA0 || (charset_ID
= emacs_mule_charset
[c
]) < 0)
2082 if ((charset_ID
= emacs_mule_charset
[c
]) < 0)
2087 code
= (c
& 0x7F) << 8;
2097 if (c
< 0 || (charset_ID
= emacs_mule_charset
[c
]) < 0)
2102 code
= (c
& 0x7F) << 8;
2111 charset_ID
= ASCII_CHAR_P (code
) ? charset_ascii
: charset_eight_bit
;
2117 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
,
2118 CHARSET_FROM_ID (charset_ID
), code
, c
);
2122 *nbytes
= src
- src_base
;
2123 *nchars
= consumed_chars
;
2126 return (mseq_found
? -c
: c
);
2136 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
2138 /* Handle these composition sequence ('|': the end of header elements,
2139 BYTES and CHARS >= 0xA0):
2141 (1) relative composition: 0x80 0xF2 BYTES CHARS | CHAR ...
2142 (2) altchar composition: 0x80 0xF4 BYTES CHARS | ALT ... ALT CHAR ...
2143 (3) alt&rule composition: 0x80 0xF5 BYTES CHARS | ALT RULE ... ALT CHAR ...
2147 (4) relative composition: 0x80 | MSEQ ... MSEQ
2148 (5) rulebase composition: 0x80 0xFF | MSEQ MRULE ... MSEQ
2150 When the starter 0x80 and the following header elements are found,
2151 this annotation header is produced.
2153 [ -LENGTH(==-5) CODING_ANNOTATE_COMPOSITION_MASK NCHARS NBYTES METHOD ]
2155 NCHARS is CHARS - 0xA0 for (1), (2), (3), and 0 for (4), (5).
2156 NBYTES is BYTES - 0xA0 for (1), (2), (3), and 0 for (4), (5).
2158 Then, upon reading the following elements, these codes are produced
2159 until the composition end is found:
2162 (2) ALT ... ALT CHAR ... CHAR
2163 (3) ALT -2 DECODED-RULE ALT -2 DECODED-RULE ... ALT CHAR ... CHAR
2165 (5) CHAR -2 DECODED-RULE CHAR -2 DECODED-RULE ... CHAR
2167 When the composition end is found, LENGTH and NCHARS in the
2168 annotation header is updated as below:
2170 (1) LENGTH: unchanged, NCHARS: unchanged
2171 (2) LENGTH: length of the whole sequence minus NCHARS, NCHARS: unchanged
2172 (3) LENGTH: length of the whole sequence minus NCHARS, NCHARS: unchanged
2173 (4) LENGTH: unchanged, NCHARS: number of CHARs
2174 (5) LENGTH: unchanged, NCHARS: number of CHARs
2176 If an error is found while composing, the annotation header is
2177 changed to the original composition header (plus filler -1s) as
2180 (1),(2),(3) [ 0x80 0xF2+METHOD BYTES CHARS -1 ]
2181 (5) [ 0x80 0xFF -1 -1- -1 ]
2183 and the sequence [ -2 DECODED-RULE ] is changed to the original
2184 byte sequence as below:
2185 o the original byte sequence is B: [ B -1 ]
2186 o the original byte sequence is B1 B2: [ B1 B2 ]
2188 Most of the routines are implemented by macros because many
2189 variables and labels in the caller decode_coding_emacs_mule must be
2190 accessible, and they are usually called just once (thus doesn't
2191 increase the size of compiled object). */
2193 /* Decode a composition rule represented by C as a component of
2194 composition sequence of Emacs 20 style. Set RULE to the decoded
2197 #define DECODE_EMACS_MULE_COMPOSITION_RULE_20(c, rule) \
2202 if (c < 0 || c >= 81) \
2203 goto invalid_code; \
2204 gref = c / 9, nref = c % 9; \
2205 if (gref == 4) gref = 10; \
2206 if (nref == 4) nref = 10; \
2207 rule = COMPOSITION_ENCODE_RULE (gref, nref); \
2211 /* Decode a composition rule represented by C and the following byte
2212 at SRC as a component of composition sequence of Emacs 21 style.
2213 Set RULE to the decoded rule. */
2215 #define DECODE_EMACS_MULE_COMPOSITION_RULE_21(c, rule) \
2220 if (gref < 0 || gref >= 81) \
2221 goto invalid_code; \
2222 ONE_MORE_BYTE (c); \
2224 if (nref < 0 || nref >= 81) \
2225 goto invalid_code; \
2226 rule = COMPOSITION_ENCODE_RULE (gref, nref); \
2230 /* Start of Emacs 21 style format. The first three bytes at SRC are
2231 (METHOD - 0xF2), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is the
2232 byte length of this composition information, CHARS is the number of
2233 characters composed by this composition. */
2235 #define DECODE_EMACS_MULE_21_COMPOSITION() \
2237 enum composition_method method = c - 0xF2; \
2238 int nbytes, nchars; \
2240 ONE_MORE_BYTE (c); \
2242 goto invalid_code; \
2243 nbytes = c - 0xA0; \
2244 if (nbytes < 3 || (method == COMPOSITION_RELATIVE && nbytes != 4)) \
2245 goto invalid_code; \
2246 ONE_MORE_BYTE (c); \
2247 nchars = c - 0xA0; \
2248 if (nchars <= 0 || nchars >= MAX_COMPOSITION_COMPONENTS) \
2249 goto invalid_code; \
2250 cmp_status->old_form = 0; \
2251 cmp_status->method = method; \
2252 if (method == COMPOSITION_RELATIVE) \
2253 cmp_status->state = COMPOSING_CHAR; \
2255 cmp_status->state = COMPOSING_COMPONENT_CHAR; \
2256 cmp_status->length = MAX_ANNOTATION_LENGTH; \
2257 cmp_status->nchars = nchars; \
2258 cmp_status->ncomps = nbytes - 4; \
2259 ADD_COMPOSITION_DATA (charbuf, nchars, nbytes, method); \
2263 /* Start of Emacs 20 style format for relative composition. */
2265 #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION() \
2267 cmp_status->old_form = 1; \
2268 cmp_status->method = COMPOSITION_RELATIVE; \
2269 cmp_status->state = COMPOSING_CHAR; \
2270 cmp_status->length = MAX_ANNOTATION_LENGTH; \
2271 cmp_status->nchars = cmp_status->ncomps = 0; \
2272 ADD_COMPOSITION_DATA (charbuf, 0, 0, cmp_status->method); \
2276 /* Start of Emacs 20 style format for rule-base composition. */
2278 #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION() \
2280 cmp_status->old_form = 1; \
2281 cmp_status->method = COMPOSITION_WITH_RULE; \
2282 cmp_status->state = COMPOSING_CHAR; \
2283 cmp_status->length = MAX_ANNOTATION_LENGTH; \
2284 cmp_status->nchars = cmp_status->ncomps = 0; \
2285 ADD_COMPOSITION_DATA (charbuf, 0, 0, cmp_status->method); \
2289 #define DECODE_EMACS_MULE_COMPOSITION_START() \
2291 const unsigned char *current_src = src; \
2293 ONE_MORE_BYTE (c); \
2295 goto invalid_code; \
2296 if (c - 0xF2 >= COMPOSITION_RELATIVE \
2297 && c - 0xF2 <= COMPOSITION_WITH_RULE_ALTCHARS) \
2298 DECODE_EMACS_MULE_21_COMPOSITION (); \
2299 else if (c < 0xA0) \
2300 goto invalid_code; \
2301 else if (c < 0xC0) \
2303 DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (); \
2304 /* Re-read C as a composition component. */ \
2305 src = current_src; \
2307 else if (c == 0xFF) \
2308 DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (); \
2310 goto invalid_code; \
2313 #define EMACS_MULE_COMPOSITION_END() \
2315 int idx = - cmp_status->length; \
2317 if (cmp_status->old_form) \
2318 charbuf[idx + 2] = cmp_status->nchars; \
2319 else if (cmp_status->method > COMPOSITION_RELATIVE) \
2320 charbuf[idx] = charbuf[idx + 2] - cmp_status->length; \
2321 cmp_status->state = COMPOSING_NO; \
2326 emacs_mule_finish_composition (int *charbuf
,
2327 struct composition_status
*cmp_status
)
2329 int idx
= - cmp_status
->length
;
2332 if (cmp_status
->old_form
&& cmp_status
->nchars
> 0)
2334 charbuf
[idx
+ 2] = cmp_status
->nchars
;
2336 if (cmp_status
->method
== COMPOSITION_WITH_RULE
2337 && cmp_status
->state
== COMPOSING_CHAR
)
2339 /* The last rule was invalid. */
2340 int rule
= charbuf
[-1] + 0xA0;
2342 charbuf
[-2] = BYTE8_TO_CHAR (rule
);
2349 charbuf
[idx
++] = BYTE8_TO_CHAR (0x80);
2351 if (cmp_status
->method
== COMPOSITION_WITH_RULE
)
2353 charbuf
[idx
++] = BYTE8_TO_CHAR (0xFF);
2354 charbuf
[idx
++] = -3;
2360 int nchars
= charbuf
[idx
+ 1] + 0xA0;
2361 int nbytes
= charbuf
[idx
+ 2] + 0xA0;
2363 charbuf
[idx
++] = BYTE8_TO_CHAR (0xF2 + cmp_status
->method
);
2364 charbuf
[idx
++] = BYTE8_TO_CHAR (nbytes
);
2365 charbuf
[idx
++] = BYTE8_TO_CHAR (nchars
);
2366 charbuf
[idx
++] = -1;
2370 cmp_status
->state
= COMPOSING_NO
;
2374 #define EMACS_MULE_MAYBE_FINISH_COMPOSITION() \
2376 if (cmp_status->state != COMPOSING_NO) \
2377 char_offset += emacs_mule_finish_composition (charbuf, cmp_status); \
2382 decode_coding_emacs_mule (struct coding_system
*coding
)
2384 const unsigned char *src
= coding
->source
+ coding
->consumed
;
2385 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
2386 const unsigned char *src_base
;
2387 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
2388 /* We may produce two annotations (charset and composition) in one
2389 loop and one more charset annotation at the end. */
2391 = coding
->charbuf
+ coding
->charbuf_size
- (MAX_ANNOTATION_LENGTH
* 3)
2392 /* We can produce up to 2 characters in a loop. */
2394 ptrdiff_t consumed_chars
= 0, consumed_chars_base
;
2395 bool multibytep
= coding
->src_multibyte
;
2396 ptrdiff_t char_offset
= coding
->produced_char
;
2397 ptrdiff_t last_offset
= char_offset
;
2398 int last_id
= charset_ascii
;
2400 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
2401 int byte_after_cr
= -1;
2402 struct composition_status
*cmp_status
= &coding
->spec
.emacs_mule
.cmp_status
;
2404 if (cmp_status
->state
!= COMPOSING_NO
)
2408 if (charbuf_end
- charbuf
< cmp_status
->length
)
2410 for (i
= 0; i
< cmp_status
->length
; i
++)
2411 *charbuf
++ = cmp_status
->carryover
[i
];
2412 coding
->annotated
= 1;
2417 int c
, id
IF_LINT (= 0);
2420 consumed_chars_base
= consumed_chars
;
2422 if (charbuf
>= charbuf_end
)
2424 if (byte_after_cr
>= 0)
2429 if (byte_after_cr
>= 0)
2430 c
= byte_after_cr
, byte_after_cr
= -1;
2434 if (c
< 0 || c
== 0x80)
2436 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2443 DECODE_EMACS_MULE_COMPOSITION_START ();
2449 if (eol_dos
&& c
== '\r')
2450 ONE_MORE_BYTE (byte_after_cr
);
2452 if (cmp_status
->state
!= COMPOSING_NO
)
2454 if (cmp_status
->old_form
)
2455 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2456 else if (cmp_status
->state
>= COMPOSING_COMPONENT_CHAR
)
2457 cmp_status
->ncomps
--;
2462 int nchars
IF_LINT (= 0), nbytes
IF_LINT (= 0);
2463 /* emacs_mule_char can load a charset map from a file, which
2464 allocates a large structure and might cause buffer text
2465 to be relocated as result. Thus, we need to remember the
2466 original pointer to buffer text, and fix up all related
2467 pointers after the call. */
2468 const unsigned char *orig
= coding
->source
;
2471 c
= emacs_mule_char (coding
, src_base
, &nbytes
, &nchars
, &id
,
2473 offset
= coding
->source
- orig
;
2487 src
= src_base
+ nbytes
;
2488 consumed_chars
= consumed_chars_base
+ nchars
;
2489 if (cmp_status
->state
>= COMPOSING_COMPONENT_CHAR
)
2490 cmp_status
->ncomps
-= nchars
;
2493 /* Now if C >= 0, we found a normally encoded character, if C <
2494 0, we found an old-style composition component character or
2497 if (cmp_status
->state
== COMPOSING_NO
)
2501 if (last_id
!= charset_ascii
)
2502 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
,
2505 last_offset
= char_offset
;
2510 else if (cmp_status
->state
== COMPOSING_CHAR
)
2512 if (cmp_status
->old_form
)
2516 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2523 cmp_status
->nchars
++;
2524 cmp_status
->length
++;
2525 if (cmp_status
->nchars
== MAX_COMPOSITION_COMPONENTS
)
2526 EMACS_MULE_COMPOSITION_END ();
2527 else if (cmp_status
->method
== COMPOSITION_WITH_RULE
)
2528 cmp_status
->state
= COMPOSING_RULE
;
2534 cmp_status
->length
++;
2535 cmp_status
->nchars
--;
2536 if (cmp_status
->nchars
== 0)
2537 EMACS_MULE_COMPOSITION_END ();
2540 else if (cmp_status
->state
== COMPOSING_RULE
)
2546 EMACS_MULE_COMPOSITION_END ();
2553 DECODE_EMACS_MULE_COMPOSITION_RULE_20 (c
, rule
);
2558 cmp_status
->length
+= 2;
2559 cmp_status
->state
= COMPOSING_CHAR
;
2562 else if (cmp_status
->state
== COMPOSING_COMPONENT_CHAR
)
2565 cmp_status
->length
++;
2566 if (cmp_status
->ncomps
== 0)
2567 cmp_status
->state
= COMPOSING_CHAR
;
2568 else if (cmp_status
->ncomps
> 0)
2570 if (cmp_status
->method
== COMPOSITION_WITH_RULE_ALTCHARS
)
2571 cmp_status
->state
= COMPOSING_COMPONENT_RULE
;
2574 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2576 else /* COMPOSING_COMPONENT_RULE */
2580 DECODE_EMACS_MULE_COMPOSITION_RULE_21 (c
, rule
);
2585 cmp_status
->length
+= 2;
2586 cmp_status
->ncomps
--;
2587 if (cmp_status
->ncomps
> 0)
2588 cmp_status
->state
= COMPOSING_COMPONENT_CHAR
;
2590 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2595 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2597 consumed_chars
= consumed_chars_base
;
2599 *charbuf
++ = ASCII_CHAR_P (c
) ? c
: BYTE8_TO_CHAR (c
);
2605 if (cmp_status
->state
!= COMPOSING_NO
)
2607 if (coding
->mode
& CODING_MODE_LAST_BLOCK
)
2608 EMACS_MULE_MAYBE_FINISH_COMPOSITION ();
2613 charbuf
-= cmp_status
->length
;
2614 for (i
= 0; i
< cmp_status
->length
; i
++)
2615 cmp_status
->carryover
[i
] = charbuf
[i
];
2618 if (last_id
!= charset_ascii
)
2619 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
2620 coding
->consumed_char
+= consumed_chars_base
;
2621 coding
->consumed
= src_base
- coding
->source
;
2622 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
2626 #define EMACS_MULE_LEADING_CODES(id, codes) \
2629 codes[0] = id, codes[1] = 0; \
2630 else if (id < 0xE0) \
2631 codes[0] = 0x9A, codes[1] = id; \
2632 else if (id < 0xF0) \
2633 codes[0] = 0x9B, codes[1] = id; \
2634 else if (id < 0xF5) \
2635 codes[0] = 0x9C, codes[1] = id; \
2637 codes[0] = 0x9D, codes[1] = id; \
2642 encode_coding_emacs_mule (struct coding_system
*coding
)
2644 bool multibytep
= coding
->dst_multibyte
;
2645 int *charbuf
= coding
->charbuf
;
2646 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
2647 unsigned char *dst
= coding
->destination
+ coding
->produced
;
2648 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
2650 ptrdiff_t produced_chars
= 0;
2651 Lisp_Object attrs
, charset_list
;
2653 int preferred_charset_id
= -1;
2655 CODING_GET_INFO (coding
, attrs
, charset_list
);
2656 if (! EQ (charset_list
, Vemacs_mule_charset_list
))
2658 charset_list
= Vemacs_mule_charset_list
;
2659 ASET (attrs
, coding_attr_charset_list
, charset_list
);
2662 while (charbuf
< charbuf_end
)
2664 ASSURE_DESTINATION (safe_room
);
2669 /* Handle an annotation. */
2672 case CODING_ANNOTATE_COMPOSITION_MASK
:
2673 /* Not yet implemented. */
2675 case CODING_ANNOTATE_CHARSET_MASK
:
2676 preferred_charset_id
= charbuf
[3];
2677 if (preferred_charset_id
>= 0
2678 && NILP (Fmemq (make_number (preferred_charset_id
),
2680 preferred_charset_id
= -1;
2689 if (ASCII_CHAR_P (c
))
2690 EMIT_ONE_ASCII_BYTE (c
);
2691 else if (CHAR_BYTE8_P (c
))
2693 c
= CHAR_TO_BYTE8 (c
);
2698 struct charset
*charset
;
2702 unsigned char leading_codes
[2];
2704 if (preferred_charset_id
>= 0)
2708 charset
= CHARSET_FROM_ID (preferred_charset_id
);
2709 CODING_CHAR_CHARSET_P (coding
, dst
, dst_end
, c
, charset
, result
);
2711 code
= ENCODE_CHAR (charset
, c
);
2713 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
2717 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
2721 c
= coding
->default_char
;
2722 if (ASCII_CHAR_P (c
))
2724 EMIT_ONE_ASCII_BYTE (c
);
2727 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
2730 dimension
= CHARSET_DIMENSION (charset
);
2731 emacs_mule_id
= CHARSET_EMACS_MULE_ID (charset
);
2732 EMACS_MULE_LEADING_CODES (emacs_mule_id
, leading_codes
);
2733 EMIT_ONE_BYTE (leading_codes
[0]);
2734 if (leading_codes
[1])
2735 EMIT_ONE_BYTE (leading_codes
[1]);
2737 EMIT_ONE_BYTE (code
| 0x80);
2741 EMIT_ONE_BYTE (code
>> 8);
2742 EMIT_ONE_BYTE (code
& 0xFF);
2746 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
2747 coding
->produced_char
+= produced_chars
;
2748 coding
->produced
= dst
- coding
->destination
;
2753 /*** 7. ISO2022 handlers ***/
2755 /* The following note describes the coding system ISO2022 briefly.
2756 Since the intention of this note is to help understand the
2757 functions in this file, some parts are NOT ACCURATE or are OVERLY
2758 SIMPLIFIED. For thorough understanding, please refer to the
2759 original document of ISO2022. This is equivalent to the standard
2760 ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*).
2762 ISO2022 provides many mechanisms to encode several character sets
2763 in 7-bit and 8-bit environments. For 7-bit environments, all text
2764 is encoded using bytes less than 128. This may make the encoded
2765 text a little bit longer, but the text passes more easily through
2766 several types of gateway, some of which strip off the MSB (Most
2769 There are two kinds of character sets: control character sets and
2770 graphic character sets. The former contain control characters such
2771 as `newline' and `escape' to provide control functions (control
2772 functions are also provided by escape sequences). The latter
2773 contain graphic characters such as 'A' and '-'. Emacs recognizes
2774 two control character sets and many graphic character sets.
2776 Graphic character sets are classified into one of the following
2777 four classes, according to the number of bytes (DIMENSION) and
2778 number of characters in one dimension (CHARS) of the set:
2779 - DIMENSION1_CHARS94
2780 - DIMENSION1_CHARS96
2781 - DIMENSION2_CHARS94
2782 - DIMENSION2_CHARS96
2784 In addition, each character set is assigned an identification tag,
2785 unique for each set, called the "final character" (denoted as <F>
2786 hereafter). The <F> of each character set is decided by ECMA(*)
2787 when it is registered in ISO. The code range of <F> is 0x30..0x7F
2788 (0x30..0x3F are for private use only).
2790 Note (*): ECMA = European Computer Manufacturers Association
2792 Here are examples of graphic character sets [NAME(<F>)]:
2793 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
2794 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
2795 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
2796 o DIMENSION2_CHARS96 -- none for the moment
2798 A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR.
2799 C0 [0x00..0x1F] -- control character plane 0
2800 GL [0x20..0x7F] -- graphic character plane 0
2801 C1 [0x80..0x9F] -- control character plane 1
2802 GR [0xA0..0xFF] -- graphic character plane 1
2804 A control character set is directly designated and invoked to C0 or
2805 C1 by an escape sequence. The most common case is that:
2806 - ISO646's control character set is designated/invoked to C0, and
2807 - ISO6429's control character set is designated/invoked to C1,
2808 and usually these designations/invocations are omitted in encoded
2809 text. In a 7-bit environment, only C0 can be used, and a control
2810 character for C1 is encoded by an appropriate escape sequence to
2811 fit into the environment. All control characters for C1 are
2812 defined to have corresponding escape sequences.
2814 A graphic character set is at first designated to one of four
2815 graphic registers (G0 through G3), then these graphic registers are
2816 invoked to GL or GR. These designations and invocations can be
2817 done independently. The most common case is that G0 is invoked to
2818 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
2819 these invocations and designations are omitted in encoded text.
2820 In a 7-bit environment, only GL can be used.
2822 When a graphic character set of CHARS94 is invoked to GL, codes
2823 0x20 and 0x7F of the GL area work as control characters SPACE and
2824 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
2827 There are two ways of invocation: locking-shift and single-shift.
2828 With locking-shift, the invocation lasts until the next different
2829 invocation, whereas with single-shift, the invocation affects the
2830 following character only and doesn't affect the locking-shift
2831 state. Invocations are done by the following control characters or
2834 ----------------------------------------------------------------------
2835 abbrev function cntrl escape seq description
2836 ----------------------------------------------------------------------
2837 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
2838 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
2839 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
2840 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
2841 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
2842 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
2843 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
2844 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
2845 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
2846 ----------------------------------------------------------------------
2847 (*) These are not used by any known coding system.
2849 Control characters for these functions are defined by macros
2850 ISO_CODE_XXX in `coding.h'.
2852 Designations are done by the following escape sequences:
2853 ----------------------------------------------------------------------
2854 escape sequence description
2855 ----------------------------------------------------------------------
2856 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
2857 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
2858 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
2859 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
2860 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
2861 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
2862 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
2863 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
2864 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
2865 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
2866 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
2867 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
2868 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
2869 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
2870 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
2871 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
2872 ----------------------------------------------------------------------
2874 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
2875 of dimension 1, chars 94, and final character <F>, etc...
2877 Note (*): Although these designations are not allowed in ISO2022,
2878 Emacs accepts them on decoding, and produces them on encoding
2879 CHARS96 character sets in a coding system which is characterized as
2880 7-bit environment, non-locking-shift, and non-single-shift.
2882 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
2883 '(' must be omitted. We refer to this as "short-form" hereafter.
2885 Now you may notice that there are a lot of ways of encoding the
2886 same multilingual text in ISO2022. Actually, there exist many
2887 coding systems such as Compound Text (used in X11's inter client
2888 communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR
2889 (used in Korean Internet), EUC (Extended UNIX Code, used in Asian
2890 localized platforms), and all of these are variants of ISO2022.
2892 In addition to the above, Emacs handles two more kinds of escape
2893 sequences: ISO6429's direction specification and Emacs' private
2894 sequence for specifying character composition.
2896 ISO6429's direction specification takes the following form:
2897 o CSI ']' -- end of the current direction
2898 o CSI '0' ']' -- end of the current direction
2899 o CSI '1' ']' -- start of left-to-right text
2900 o CSI '2' ']' -- start of right-to-left text
2901 The control character CSI (0x9B: control sequence introducer) is
2902 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
2904 Character composition specification takes the following form:
2905 o ESC '0' -- start relative composition
2906 o ESC '1' -- end composition
2907 o ESC '2' -- start rule-base composition (*)
2908 o ESC '3' -- start relative composition with alternate chars (**)
2909 o ESC '4' -- start rule-base composition with alternate chars (**)
2910 Since these are not standard escape sequences of any ISO standard,
2911 the use of them with these meanings is restricted to Emacs only.
2913 (*) This form is used only in Emacs 20.7 and older versions,
2914 but newer versions can safely decode it.
2915 (**) This form is used only in Emacs 21.1 and newer versions,
2916 and older versions can't decode it.
2918 Here's a list of example usages of these composition escape
2919 sequences (categorized by `enum composition_method').
2921 COMPOSITION_RELATIVE:
2922 ESC 0 CHAR [ CHAR ] ESC 1
2923 COMPOSITION_WITH_RULE:
2924 ESC 2 CHAR [ RULE CHAR ] ESC 1
2925 COMPOSITION_WITH_ALTCHARS:
2926 ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1
2927 COMPOSITION_WITH_RULE_ALTCHARS:
2928 ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */
2930 static enum iso_code_class_type iso_code_class
[256];
2932 #define SAFE_CHARSET_P(coding, id) \
2933 ((id) <= (coding)->max_charset_id \
2934 && (coding)->safe_charsets[id] != 255)
2937 setup_iso_safe_charsets (Lisp_Object attrs
)
2939 Lisp_Object charset_list
, safe_charsets
;
2940 Lisp_Object request
;
2941 Lisp_Object reg_usage
;
2943 EMACS_INT reg94
, reg96
;
2944 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
2947 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
2948 if ((flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
2949 && ! EQ (charset_list
, Viso_2022_charset_list
))
2951 charset_list
= Viso_2022_charset_list
;
2952 ASET (attrs
, coding_attr_charset_list
, charset_list
);
2953 ASET (attrs
, coding_attr_safe_charsets
, Qnil
);
2956 if (STRINGP (AREF (attrs
, coding_attr_safe_charsets
)))
2960 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
2962 int id
= XINT (XCAR (tail
));
2963 if (max_charset_id
< id
)
2964 max_charset_id
= id
;
2967 safe_charsets
= make_uninit_string (max_charset_id
+ 1);
2968 memset (SDATA (safe_charsets
), 255, max_charset_id
+ 1);
2969 request
= AREF (attrs
, coding_attr_iso_request
);
2970 reg_usage
= AREF (attrs
, coding_attr_iso_usage
);
2971 reg94
= XINT (XCAR (reg_usage
));
2972 reg96
= XINT (XCDR (reg_usage
));
2974 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
2978 struct charset
*charset
;
2981 charset
= CHARSET_FROM_ID (XINT (id
));
2982 reg
= Fcdr (Fassq (id
, request
));
2984 SSET (safe_charsets
, XINT (id
), XINT (reg
));
2985 else if (charset
->iso_chars_96
)
2988 SSET (safe_charsets
, XINT (id
), reg96
);
2993 SSET (safe_charsets
, XINT (id
), reg94
);
2996 ASET (attrs
, coding_attr_safe_charsets
, safe_charsets
);
3000 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
3001 Return true if a text is encoded in one of ISO-2022 based coding
3005 detect_coding_iso_2022 (struct coding_system
*coding
,
3006 struct coding_detection_info
*detect_info
)
3008 const unsigned char *src
= coding
->source
, *src_base
= src
;
3009 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
3010 bool multibytep
= coding
->src_multibyte
;
3011 bool single_shifting
= 0;
3014 ptrdiff_t consumed_chars
= 0;
3018 int composition_count
= -1;
3020 detect_info
->checked
|= CATEGORY_MASK_ISO
;
3022 for (i
= coding_category_iso_7
; i
<= coding_category_iso_8_else
; i
++)
3024 struct coding_system
*this = &(coding_categories
[i
]);
3025 Lisp_Object attrs
, val
;
3029 attrs
= CODING_ID_ATTRS (this->id
);
3030 if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT
3031 && ! EQ (CODING_ATTR_CHARSET_LIST (attrs
), Viso_2022_charset_list
))
3032 setup_iso_safe_charsets (attrs
);
3033 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
3034 this->max_charset_id
= SCHARS (val
) - 1;
3035 this->safe_charsets
= SDATA (val
);
3038 /* A coding system of this category is always ASCII compatible. */
3039 src
+= coding
->head_ascii
;
3041 while (rejected
!= CATEGORY_MASK_ISO
)
3048 if (inhibit_iso_escape_detection
)
3050 single_shifting
= 0;
3052 if (c
== 'N' || c
== 'O')
3054 /* ESC <Fe> for SS2 or SS3. */
3055 single_shifting
= 1;
3056 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_8BIT
;
3060 /* End of composition. */
3061 if (composition_count
< 0
3062 || composition_count
> MAX_COMPOSITION_COMPONENTS
)
3065 composition_count
= -1;
3066 found
|= CATEGORY_MASK_ISO
;
3068 else if (c
>= '0' && c
<= '4')
3070 /* ESC <Fp> for start/end composition. */
3071 composition_count
= 0;
3075 if (c
>= '(' && c
<= '/')
3077 /* Designation sequence for a charset of dimension 1. */
3079 if (c1
< ' ' || c1
>= 0x80
3080 || (id
= iso_charset_table
[0][c
>= ','][c1
]) < 0)
3081 /* Invalid designation sequence. Just ignore. */
3086 /* Designation sequence for a charset of dimension 2. */
3088 if (c
>= '@' && c
<= 'B')
3089 /* Designation for JISX0208.1978, GB2312, or JISX0208. */
3090 id
= iso_charset_table
[1][0][c
];
3091 else if (c
>= '(' && c
<= '/')
3094 if (c1
< ' ' || c1
>= 0x80
3095 || (id
= iso_charset_table
[1][c
>= ','][c1
]) < 0)
3096 /* Invalid designation sequence. Just ignore. */
3100 /* Invalid designation sequence. Just ignore it. */
3105 /* Invalid escape sequence. Just ignore it. */
3109 /* We found a valid designation sequence for CHARSET. */
3110 rejected
|= CATEGORY_MASK_ISO_8BIT
;
3111 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7
],
3113 found
|= CATEGORY_MASK_ISO_7
;
3115 rejected
|= CATEGORY_MASK_ISO_7
;
3116 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7_tight
],
3118 found
|= CATEGORY_MASK_ISO_7_TIGHT
;
3120 rejected
|= CATEGORY_MASK_ISO_7_TIGHT
;
3121 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7_else
],
3123 found
|= CATEGORY_MASK_ISO_7_ELSE
;
3125 rejected
|= CATEGORY_MASK_ISO_7_ELSE
;
3126 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_8_else
],
3128 found
|= CATEGORY_MASK_ISO_8_ELSE
;
3130 rejected
|= CATEGORY_MASK_ISO_8_ELSE
;
3136 /* Locking shift out/in. */
3137 if (inhibit_iso_escape_detection
)
3139 single_shifting
= 0;
3140 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_8BIT
;
3144 /* Control sequence introducer. */
3145 single_shifting
= 0;
3146 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_7_ELSE
;
3147 found
|= CATEGORY_MASK_ISO_8_ELSE
;
3148 goto check_extra_latin
;
3153 if (inhibit_iso_escape_detection
)
3155 single_shifting
= 0;
3156 rejected
|= CATEGORY_MASK_ISO_7BIT
;
3157 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_1
])
3158 & CODING_ISO_FLAG_SINGLE_SHIFT
)
3160 found
|= CATEGORY_MASK_ISO_8_1
;
3161 single_shifting
= 1;
3163 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_2
])
3164 & CODING_ISO_FLAG_SINGLE_SHIFT
)
3166 found
|= CATEGORY_MASK_ISO_8_2
;
3167 single_shifting
= 1;
3169 if (single_shifting
)
3171 goto check_extra_latin
;
3178 if (composition_count
>= 0)
3179 composition_count
++;
3180 single_shifting
= 0;
3185 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_7_ELSE
;
3186 found
|= CATEGORY_MASK_ISO_8_1
;
3187 /* Check the length of succeeding codes of the range
3188 0xA0..0FF. If the byte length is even, we include
3189 CATEGORY_MASK_ISO_8_2 in `found'. We can check this
3190 only when we are not single shifting. */
3191 if (! single_shifting
3192 && ! (rejected
& CATEGORY_MASK_ISO_8_2
))
3195 while (src
< src_end
)
3207 if (len
& 1 && src
< src_end
)
3209 rejected
|= CATEGORY_MASK_ISO_8_2
;
3210 if (composition_count
>= 0)
3211 composition_count
+= len
;
3215 found
|= CATEGORY_MASK_ISO_8_2
;
3216 if (composition_count
>= 0)
3217 composition_count
+= len
/ 2;
3223 if (! VECTORP (Vlatin_extra_code_table
)
3224 || NILP (AREF (Vlatin_extra_code_table
, c
)))
3226 rejected
= CATEGORY_MASK_ISO
;
3229 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_1
])
3230 & CODING_ISO_FLAG_LATIN_EXTRA
)
3231 found
|= CATEGORY_MASK_ISO_8_1
;
3233 rejected
|= CATEGORY_MASK_ISO_8_1
;
3234 rejected
|= CATEGORY_MASK_ISO_8_2
;
3238 detect_info
->rejected
|= CATEGORY_MASK_ISO
;
3242 detect_info
->rejected
|= rejected
;
3243 detect_info
->found
|= (found
& ~rejected
);
3248 /* Set designation state into CODING. Set CHARS_96 to -1 if the
3249 escape sequence should be kept. */
3250 #define DECODE_DESIGNATION(reg, dim, chars_96, final) \
3254 if (final < '0' || final >= 128 \
3255 || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \
3256 || !SAFE_CHARSET_P (coding, id)) \
3258 CODING_ISO_DESIGNATION (coding, reg) = -2; \
3262 prev = CODING_ISO_DESIGNATION (coding, reg); \
3263 if (id == charset_jisx0201_roman) \
3265 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \
3266 id = charset_ascii; \
3268 else if (id == charset_jisx0208_1978) \
3270 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \
3271 id = charset_jisx0208; \
3273 CODING_ISO_DESIGNATION (coding, reg) = id; \
3274 /* If there was an invalid designation to REG previously, and this \
3275 designation is ASCII to REG, we should keep this designation \
3277 if (prev == -2 && id == charset_ascii) \
3282 /* Handle these composition sequence (ALT: alternate char):
3284 (1) relative composition: ESC 0 CHAR ... ESC 1
3285 (2) rulebase composition: ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1
3286 (3) altchar composition: ESC 3 ALT ... ALT ESC 0 CHAR ... ESC 1
3287 (4) alt&rule composition: ESC 4 ALT RULE ... ALT ESC 0 CHAR ... ESC 1
3289 When the start sequence (ESC 0/2/3/4) is found, this annotation
3292 [ -LENGTH(==-5) CODING_ANNOTATE_COMPOSITION_MASK NCHARS(==0) 0 METHOD ]
3294 Then, upon reading CHAR or RULE (one or two bytes), these codes are
3295 produced until the end sequence (ESC 1) is found:
3298 (2) CHAR -2 DECODED-RULE CHAR -2 DECODED-RULE ... CHAR
3299 (3) ALT ... ALT -1 -1 CHAR ... CHAR
3300 (4) ALT -2 DECODED-RULE ALT -2 DECODED-RULE ... ALT -1 -1 CHAR ... CHAR
3302 When the end sequence (ESC 1) is found, LENGTH and NCHARS in the
3303 annotation header is updated as below:
3305 (1) LENGTH: unchanged, NCHARS: number of CHARs
3306 (2) LENGTH: unchanged, NCHARS: number of CHARs
3307 (3) LENGTH: += number of ALTs + 2, NCHARS: number of CHARs
3308 (4) LENGTH: += number of ALTs * 3, NCHARS: number of CHARs
3310 If an error is found while composing, the annotation header is
3313 [ ESC '0'/'2'/'3'/'4' -2 0 ]
3315 and the sequence [ -2 DECODED-RULE ] is changed to the original
3316 byte sequence as below:
3317 o the original byte sequence is B: [ B -1 ]
3318 o the original byte sequence is B1 B2: [ B1 B2 ]
3319 and the sequence [ -1 -1 ] is changed to the original byte
3324 /* Decode a composition rule C1 and maybe one more byte from the
3325 source, and set RULE to the encoded composition rule. If the rule
3326 is invalid, goto invalid_code. */
3328 #define DECODE_COMPOSITION_RULE(rule) \
3332 goto invalid_code; \
3333 if (rule < 81) /* old format (before ver.21) */ \
3335 int gref = (rule) / 9; \
3336 int nref = (rule) % 9; \
3337 if (gref == 4) gref = 10; \
3338 if (nref == 4) nref = 10; \
3339 rule = COMPOSITION_ENCODE_RULE (gref, nref); \
3341 else /* new format (after ver.21) */ \
3345 ONE_MORE_BYTE (b); \
3346 if (! COMPOSITION_ENCODE_RULE_VALID (rule - 81, b - 32)) \
3347 goto invalid_code; \
3348 rule = COMPOSITION_ENCODE_RULE (rule - 81, b - 32); \
3349 rule += 0x100; /* Distinguish it from the old format. */ \
3353 #define ENCODE_COMPOSITION_RULE(rule) \
3355 int gref = (rule % 0x100) / 12, nref = (rule % 0x100) % 12; \
3357 if (rule < 0x100) /* old format */ \
3359 if (gref == 10) gref = 4; \
3360 if (nref == 10) nref = 4; \
3361 charbuf[idx] = 32 + gref * 9 + nref; \
3362 charbuf[idx + 1] = -1; \
3365 else /* new format */ \
3367 charbuf[idx] = 32 + 81 + gref; \
3368 charbuf[idx + 1] = 32 + nref; \
3373 /* Finish the current composition as invalid. */
3376 finish_composition (int *charbuf
, struct composition_status
*cmp_status
)
3378 int idx
= - cmp_status
->length
;
3381 /* Recover the original ESC sequence */
3382 charbuf
[idx
++] = ISO_CODE_ESC
;
3383 charbuf
[idx
++] = (cmp_status
->method
== COMPOSITION_RELATIVE
? '0'
3384 : cmp_status
->method
== COMPOSITION_WITH_RULE
? '2'
3385 : cmp_status
->method
== COMPOSITION_WITH_ALTCHARS
? '3'
3386 /* cmp_status->method == COMPOSITION_WITH_RULE_ALTCHARS */
3388 charbuf
[idx
++] = -2;
3390 charbuf
[idx
++] = -1;
3391 new_chars
= cmp_status
->nchars
;
3392 if (cmp_status
->method
>= COMPOSITION_WITH_RULE
)
3393 for (; idx
< 0; idx
++)
3395 int elt
= charbuf
[idx
];
3399 ENCODE_COMPOSITION_RULE (charbuf
[idx
+ 1]);
3404 charbuf
[idx
++] = ISO_CODE_ESC
;
3409 cmp_status
->state
= COMPOSING_NO
;
3413 /* If characters are under composition, finish the composition. */
3414 #define MAYBE_FINISH_COMPOSITION() \
3416 if (cmp_status->state != COMPOSING_NO) \
3417 char_offset += finish_composition (charbuf, cmp_status); \
3420 /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4.
3422 ESC 0 : relative composition : ESC 0 CHAR ... ESC 1
3423 ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1
3424 ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1
3425 ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1
3427 Produce this annotation sequence now:
3429 [ -LENGTH(==-4) CODING_ANNOTATE_COMPOSITION_MASK NCHARS(==0) METHOD ]
3432 #define DECODE_COMPOSITION_START(c1) \
3435 && ((cmp_status->state == COMPOSING_COMPONENT_CHAR \
3436 && cmp_status->method == COMPOSITION_WITH_ALTCHARS) \
3437 || (cmp_status->state == COMPOSING_COMPONENT_RULE \
3438 && cmp_status->method == COMPOSITION_WITH_RULE_ALTCHARS))) \
3442 cmp_status->state = COMPOSING_CHAR; \
3443 cmp_status->length += 2; \
3447 MAYBE_FINISH_COMPOSITION (); \
3448 cmp_status->method = (c1 == '0' ? COMPOSITION_RELATIVE \
3449 : c1 == '2' ? COMPOSITION_WITH_RULE \
3450 : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \
3451 : COMPOSITION_WITH_RULE_ALTCHARS); \
3453 = (c1 <= '2' ? COMPOSING_CHAR : COMPOSING_COMPONENT_CHAR); \
3454 ADD_COMPOSITION_DATA (charbuf, 0, 0, cmp_status->method); \
3455 cmp_status->length = MAX_ANNOTATION_LENGTH; \
3456 cmp_status->nchars = cmp_status->ncomps = 0; \
3457 coding->annotated = 1; \
3462 /* Handle composition end sequence ESC 1. */
3464 #define DECODE_COMPOSITION_END() \
3466 if (cmp_status->nchars == 0 \
3467 || ((cmp_status->state == COMPOSING_CHAR) \
3468 == (cmp_status->method == COMPOSITION_WITH_RULE))) \
3470 MAYBE_FINISH_COMPOSITION (); \
3471 goto invalid_code; \
3473 if (cmp_status->method == COMPOSITION_WITH_ALTCHARS) \
3474 charbuf[- cmp_status->length] -= cmp_status->ncomps + 2; \
3475 else if (cmp_status->method == COMPOSITION_WITH_RULE_ALTCHARS) \
3476 charbuf[- cmp_status->length] -= cmp_status->ncomps * 3; \
3477 charbuf[- cmp_status->length + 2] = cmp_status->nchars; \
3478 char_offset += cmp_status->nchars; \
3479 cmp_status->state = COMPOSING_NO; \
3482 /* Store a composition rule RULE in charbuf, and update cmp_status. */
3484 #define STORE_COMPOSITION_RULE(rule) \
3487 *charbuf++ = rule; \
3488 cmp_status->length += 2; \
3489 cmp_status->state--; \
3492 /* Store a composed char or a component char C in charbuf, and update
3495 #define STORE_COMPOSITION_CHAR(c) \
3498 cmp_status->length++; \
3499 if (cmp_status->state == COMPOSING_CHAR) \
3500 cmp_status->nchars++; \
3502 cmp_status->ncomps++; \
3503 if (cmp_status->method == COMPOSITION_WITH_RULE \
3504 || (cmp_status->method == COMPOSITION_WITH_RULE_ALTCHARS \
3505 && cmp_status->state == COMPOSING_COMPONENT_CHAR)) \
3506 cmp_status->state++; \
3510 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
3513 decode_coding_iso_2022 (struct coding_system
*coding
)
3515 const unsigned char *src
= coding
->source
+ coding
->consumed
;
3516 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
3517 const unsigned char *src_base
;
3518 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
3519 /* We may produce two annotations (charset and composition) in one
3520 loop and one more charset annotation at the end. */
3522 = coding
->charbuf
+ coding
->charbuf_size
- (MAX_ANNOTATION_LENGTH
* 3);
3523 ptrdiff_t consumed_chars
= 0, consumed_chars_base
;
3524 bool multibytep
= coding
->src_multibyte
;
3525 /* Charsets invoked to graphic plane 0 and 1 respectively. */
3526 int charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3527 int charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
3528 int charset_id_2
, charset_id_3
;
3529 struct charset
*charset
;
3531 struct composition_status
*cmp_status
= CODING_ISO_CMP_STATUS (coding
);
3532 Lisp_Object attrs
= CODING_ID_ATTRS (coding
->id
);
3533 ptrdiff_t char_offset
= coding
->produced_char
;
3534 ptrdiff_t last_offset
= char_offset
;
3535 int last_id
= charset_ascii
;
3537 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
3538 int byte_after_cr
= -1;
3541 setup_iso_safe_charsets (attrs
);
3542 coding
->safe_charsets
= SDATA (CODING_ATTR_SAFE_CHARSETS (attrs
));
3544 if (cmp_status
->state
!= COMPOSING_NO
)
3546 if (charbuf_end
- charbuf
< cmp_status
->length
)
3548 for (i
= 0; i
< cmp_status
->length
; i
++)
3549 *charbuf
++ = cmp_status
->carryover
[i
];
3550 coding
->annotated
= 1;
3558 consumed_chars_base
= consumed_chars
;
3560 if (charbuf
>= charbuf_end
)
3562 if (byte_after_cr
>= 0)
3567 if (byte_after_cr
>= 0)
3568 c1
= byte_after_cr
, byte_after_cr
= -1;
3574 if (CODING_ISO_EXTSEGMENT_LEN (coding
) > 0)
3576 *charbuf
++ = ASCII_CHAR_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
3578 CODING_ISO_EXTSEGMENT_LEN (coding
)--;
3582 if (CODING_ISO_EMBEDDED_UTF_8 (coding
))
3584 if (c1
== ISO_CODE_ESC
)
3586 if (src
+ 1 >= src_end
)
3587 goto no_more_source
;
3588 *charbuf
++ = ISO_CODE_ESC
;
3590 if (src
[0] == '%' && src
[1] == '@')
3593 consumed_chars
+= 2;
3595 /* We are sure charbuf can contain two more chars. */
3598 CODING_ISO_EMBEDDED_UTF_8 (coding
) = 0;
3603 *charbuf
++ = ASCII_CHAR_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
3609 if ((cmp_status
->state
== COMPOSING_RULE
3610 || cmp_status
->state
== COMPOSING_COMPONENT_RULE
)
3611 && c1
!= ISO_CODE_ESC
)
3615 DECODE_COMPOSITION_RULE (rule
);
3616 STORE_COMPOSITION_RULE (rule
);
3620 /* We produce at most one character. */
3621 switch (iso_code_class
[c1
])
3623 case ISO_0x20_or_0x7F
:
3624 if (charset_id_0
< 0
3625 || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0
)))
3626 /* This is SPACE or DEL. */
3627 charset
= CHARSET_FROM_ID (charset_ascii
);
3629 charset
= CHARSET_FROM_ID (charset_id_0
);
3632 case ISO_graphic_plane_0
:
3633 if (charset_id_0
< 0)
3634 charset
= CHARSET_FROM_ID (charset_ascii
);
3636 charset
= CHARSET_FROM_ID (charset_id_0
);
3639 case ISO_0xA0_or_0xFF
:
3640 if (charset_id_1
< 0
3641 || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1
))
3642 || CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SEVEN_BITS
)
3644 /* This is a graphic character, we fall down ... */
3646 case ISO_graphic_plane_1
:
3647 if (charset_id_1
< 0)
3649 charset
= CHARSET_FROM_ID (charset_id_1
);
3653 if (eol_dos
&& c1
== '\r')
3654 ONE_MORE_BYTE (byte_after_cr
);
3655 MAYBE_FINISH_COMPOSITION ();
3656 charset
= CHARSET_FROM_ID (charset_ascii
);
3663 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3664 || CODING_ISO_DESIGNATION (coding
, 1) < 0)
3666 CODING_ISO_INVOCATION (coding
, 0) = 1;
3667 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3671 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
))
3673 CODING_ISO_INVOCATION (coding
, 0) = 0;
3674 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3677 case ISO_single_shift_2_7
:
3678 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SEVEN_BITS
))
3680 case ISO_single_shift_2
:
3681 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
))
3683 /* SS2 is handled as an escape sequence of ESC 'N' */
3685 goto label_escape_sequence
;
3687 case ISO_single_shift_3
:
3688 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
))
3690 /* SS2 is handled as an escape sequence of ESC 'O' */
3692 goto label_escape_sequence
;
3694 case ISO_control_sequence_introducer
:
3695 /* CSI is handled as an escape sequence of ESC '[' ... */
3697 goto label_escape_sequence
;
3701 label_escape_sequence
:
3702 /* Escape sequences handled here are invocation,
3703 designation, direction specification, and character
3704 composition specification. */
3707 case '&': /* revision of following character set */
3709 if (!(c1
>= '@' && c1
<= '~'))
3712 if (c1
!= ISO_CODE_ESC
)
3715 goto label_escape_sequence
;
3717 case '$': /* designation of 2-byte character set */
3718 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATION
))
3724 if (c1
>= '@' && c1
<= 'B')
3725 { /* designation of JISX0208.1978, GB2312.1980,
3727 reg
= 0, chars96
= 0;
3729 else if (c1
>= 0x28 && c1
<= 0x2B)
3730 { /* designation of DIMENSION2_CHARS94 character set */
3731 reg
= c1
- 0x28, chars96
= 0;
3734 else if (c1
>= 0x2C && c1
<= 0x2F)
3735 { /* designation of DIMENSION2_CHARS96 character set */
3736 reg
= c1
- 0x2C, chars96
= 1;
3741 DECODE_DESIGNATION (reg
, 2, chars96
, c1
);
3742 /* We must update these variables now. */
3744 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3746 charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
3752 case 'n': /* invocation of locking-shift-2 */
3753 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3754 || CODING_ISO_DESIGNATION (coding
, 2) < 0)
3756 CODING_ISO_INVOCATION (coding
, 0) = 2;
3757 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3760 case 'o': /* invocation of locking-shift-3 */
3761 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3762 || CODING_ISO_DESIGNATION (coding
, 3) < 0)
3764 CODING_ISO_INVOCATION (coding
, 0) = 3;
3765 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3768 case 'N': /* invocation of single-shift-2 */
3769 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3770 || CODING_ISO_DESIGNATION (coding
, 2) < 0)
3772 charset_id_2
= CODING_ISO_DESIGNATION (coding
, 2);
3773 if (charset_id_2
< 0)
3774 charset
= CHARSET_FROM_ID (charset_ascii
);
3776 charset
= CHARSET_FROM_ID (charset_id_2
);
3778 if (c1
< 0x20 || (c1
>= 0x80 && c1
< 0xA0)
3779 || (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SEVEN_BITS
)
3780 && ((CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LEVEL_4
)
3781 ? c1
>= 0x80 : c1
< 0x80)))
3785 case 'O': /* invocation of single-shift-3 */
3786 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3787 || CODING_ISO_DESIGNATION (coding
, 3) < 0)
3789 charset_id_3
= CODING_ISO_DESIGNATION (coding
, 3);
3790 if (charset_id_3
< 0)
3791 charset
= CHARSET_FROM_ID (charset_ascii
);
3793 charset
= CHARSET_FROM_ID (charset_id_3
);
3795 if (c1
< 0x20 || (c1
>= 0x80 && c1
< 0xA0)
3796 || (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SEVEN_BITS
)
3797 && ((CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LEVEL_4
)
3798 ? c1
>= 0x80 : c1
< 0x80)))
3802 case '0': case '2': case '3': case '4': /* start composition */
3803 if (! (coding
->common_flags
& CODING_ANNOTATE_COMPOSITION_MASK
))
3805 if (last_id
!= charset_ascii
)
3807 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
3808 last_id
= charset_ascii
;
3809 last_offset
= char_offset
;
3811 DECODE_COMPOSITION_START (c1
);
3814 case '1': /* end composition */
3815 if (cmp_status
->state
== COMPOSING_NO
)
3817 DECODE_COMPOSITION_END ();
3820 case '[': /* specification of direction */
3821 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DIRECTION
))
3823 /* For the moment, nested direction is not supported.
3824 So, `coding->mode & CODING_MODE_DIRECTION' zero means
3825 left-to-right, and nonzero means right-to-left. */
3829 case ']': /* end of the current direction */
3830 coding
->mode
&= ~CODING_MODE_DIRECTION
;
3832 case '0': /* end of the current direction */
3833 case '1': /* start of left-to-right direction */
3836 coding
->mode
&= ~CODING_MODE_DIRECTION
;
3841 case '2': /* start of right-to-left direction */
3844 coding
->mode
|= CODING_MODE_DIRECTION
;
3858 /* CTEXT extended segment:
3859 ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES--
3860 We keep these bytes as is for the moment.
3861 They may be decoded by post-read-conversion. */
3865 ONE_MORE_BYTE (dim
);
3866 if (dim
< '0' || dim
> '4')
3874 size
= ((M
- 128) * 128) + (L
- 128);
3875 if (charbuf
+ 6 > charbuf_end
)
3877 *charbuf
++ = ISO_CODE_ESC
;
3881 *charbuf
++ = BYTE8_TO_CHAR (M
);
3882 *charbuf
++ = BYTE8_TO_CHAR (L
);
3883 CODING_ISO_EXTSEGMENT_LEN (coding
) = size
;
3887 /* XFree86 extension for embedding UTF-8 in CTEXT:
3888 ESC % G --UTF-8-BYTES-- ESC % @
3889 We keep these bytes as is for the moment.
3890 They may be decoded by post-read-conversion. */
3891 if (charbuf
+ 3 > charbuf_end
)
3893 *charbuf
++ = ISO_CODE_ESC
;
3896 CODING_ISO_EMBEDDED_UTF_8 (coding
) = 1;
3904 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATION
))
3909 if (c1
>= 0x28 && c1
<= 0x2B)
3910 { /* designation of DIMENSION1_CHARS94 character set */
3911 reg
= c1
- 0x28, chars96
= 0;
3914 else if (c1
>= 0x2C && c1
<= 0x2F)
3915 { /* designation of DIMENSION1_CHARS96 character set */
3916 reg
= c1
- 0x2C, chars96
= 1;
3921 DECODE_DESIGNATION (reg
, 1, chars96
, c1
);
3922 /* We must update these variables now. */
3924 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3926 charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
3938 if (cmp_status
->state
== COMPOSING_NO
3939 && charset
->id
!= charset_ascii
3940 && last_id
!= charset
->id
)
3942 if (last_id
!= charset_ascii
)
3943 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
3944 last_id
= charset
->id
;
3945 last_offset
= char_offset
;
3948 /* Now we know CHARSET and 1st position code C1 of a character.
3949 Produce a decoded character while getting 2nd and 3rd
3950 position codes C2, C3 if necessary. */
3951 if (CHARSET_DIMENSION (charset
) > 1)
3954 if (c2
< 0x20 || (c2
>= 0x80 && c2
< 0xA0)
3955 || ((c1
& 0x80) != (c2
& 0x80)))
3956 /* C2 is not in a valid range. */
3958 if (CHARSET_DIMENSION (charset
) == 2)
3959 c1
= (c1
<< 8) | c2
;
3963 if (c3
< 0x20 || (c3
>= 0x80 && c3
< 0xA0)
3964 || ((c1
& 0x80) != (c3
& 0x80)))
3965 /* C3 is not in a valid range. */
3967 c1
= (c1
<< 16) | (c2
<< 8) | c2
;
3971 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c1
, c
);
3974 MAYBE_FINISH_COMPOSITION ();
3975 for (; src_base
< src
; src_base
++, char_offset
++)
3977 if (ASCII_CHAR_P (*src_base
))
3978 *charbuf
++ = *src_base
;
3980 *charbuf
++ = BYTE8_TO_CHAR (*src_base
);
3983 else if (cmp_status
->state
== COMPOSING_NO
)
3988 else if ((cmp_status
->state
== COMPOSING_CHAR
3989 ? cmp_status
->nchars
3990 : cmp_status
->ncomps
)
3991 >= MAX_COMPOSITION_COMPONENTS
)
3993 /* Too long composition. */
3994 MAYBE_FINISH_COMPOSITION ();
3999 STORE_COMPOSITION_CHAR (c
);
4003 MAYBE_FINISH_COMPOSITION ();
4005 consumed_chars
= consumed_chars_base
;
4007 *charbuf
++ = c
< 0 ? -c
: ASCII_CHAR_P (c
) ? c
: BYTE8_TO_CHAR (c
);
4010 /* Reset the invocation and designation status to the safest
4011 one; i.e. designate ASCII to the graphic register 0, and
4012 invoke that register to the graphic plane 0. This typically
4013 helps the case that an designation sequence for ASCII "ESC (
4014 B" is somehow broken (e.g. broken by a newline). */
4015 CODING_ISO_INVOCATION (coding
, 0) = 0;
4016 CODING_ISO_DESIGNATION (coding
, 0) = charset_ascii
;
4017 charset_id_0
= charset_ascii
;
4025 if (cmp_status
->state
!= COMPOSING_NO
)
4027 if (coding
->mode
& CODING_MODE_LAST_BLOCK
)
4028 MAYBE_FINISH_COMPOSITION ();
4031 charbuf
-= cmp_status
->length
;
4032 for (i
= 0; i
< cmp_status
->length
; i
++)
4033 cmp_status
->carryover
[i
] = charbuf
[i
];
4036 else if (last_id
!= charset_ascii
)
4037 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4038 coding
->consumed_char
+= consumed_chars_base
;
4039 coding
->consumed
= src_base
- coding
->source
;
4040 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4044 /* ISO2022 encoding stuff. */
4047 It is not enough to say just "ISO2022" on encoding, we have to
4048 specify more details. In Emacs, each coding system of ISO2022
4049 variant has the following specifications:
4050 1. Initial designation to G0 thru G3.
4051 2. Allows short-form designation?
4052 3. ASCII should be designated to G0 before control characters?
4053 4. ASCII should be designated to G0 at end of line?
4054 5. 7-bit environment or 8-bit environment?
4055 6. Use locking-shift?
4056 7. Use Single-shift?
4057 And the following two are only for Japanese:
4058 8. Use ASCII in place of JIS0201-1976-Roman?
4059 9. Use JISX0208-1983 in place of JISX0208-1978?
4060 These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits
4061 defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more
4065 /* Produce codes (escape sequence) for designating CHARSET to graphic
4066 register REG at DST, and increment DST. If <final-char> of CHARSET is
4067 '@', 'A', or 'B' and the coding system CODING allows, produce
4068 designation sequence of short-form. */
4070 #define ENCODE_DESIGNATION(charset, reg, coding) \
4072 unsigned char final_char = CHARSET_ISO_FINAL (charset); \
4073 const char *intermediate_char_94 = "()*+"; \
4074 const char *intermediate_char_96 = ",-./"; \
4075 int revision = -1; \
4077 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \
4078 revision = CHARSET_ISO_REVISION (charset); \
4080 if (revision >= 0) \
4082 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \
4083 EMIT_ONE_BYTE ('@' + revision); \
4085 EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \
4086 if (CHARSET_DIMENSION (charset) == 1) \
4089 if (! CHARSET_ISO_CHARS_96 (charset)) \
4090 b = intermediate_char_94[reg]; \
4092 b = intermediate_char_96[reg]; \
4093 EMIT_ONE_ASCII_BYTE (b); \
4097 EMIT_ONE_ASCII_BYTE ('$'); \
4098 if (! CHARSET_ISO_CHARS_96 (charset)) \
4100 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \
4102 || final_char < '@' || final_char > 'B') \
4103 EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \
4106 EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \
4108 EMIT_ONE_ASCII_BYTE (final_char); \
4110 CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \
4114 /* The following two macros produce codes (control character or escape
4115 sequence) for ISO2022 single-shift functions (single-shift-2 and
4118 #define ENCODE_SINGLE_SHIFT_2 \
4120 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
4121 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \
4123 EMIT_ONE_BYTE (ISO_CODE_SS2); \
4124 CODING_ISO_SINGLE_SHIFTING (coding) = 1; \
4128 #define ENCODE_SINGLE_SHIFT_3 \
4130 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
4131 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \
4133 EMIT_ONE_BYTE (ISO_CODE_SS3); \
4134 CODING_ISO_SINGLE_SHIFTING (coding) = 1; \
4138 /* The following four macros produce codes (control character or
4139 escape sequence) for ISO2022 locking-shift functions (shift-in,
4140 shift-out, locking-shift-2, and locking-shift-3). */
4142 #define ENCODE_SHIFT_IN \
4144 EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \
4145 CODING_ISO_INVOCATION (coding, 0) = 0; \
4149 #define ENCODE_SHIFT_OUT \
4151 EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \
4152 CODING_ISO_INVOCATION (coding, 0) = 1; \
4156 #define ENCODE_LOCKING_SHIFT_2 \
4158 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \
4159 CODING_ISO_INVOCATION (coding, 0) = 2; \
4163 #define ENCODE_LOCKING_SHIFT_3 \
4165 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \
4166 CODING_ISO_INVOCATION (coding, 0) = 3; \
4170 /* Produce codes for a DIMENSION1 character whose character set is
4171 CHARSET and whose position-code is C1. Designation and invocation
4172 sequences are also produced in advance if necessary. */
4174 #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \
4176 int id = CHARSET_ID (charset); \
4178 if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \
4179 && id == charset_ascii) \
4181 id = charset_jisx0201_roman; \
4182 charset = CHARSET_FROM_ID (id); \
4185 if (CODING_ISO_SINGLE_SHIFTING (coding)) \
4187 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
4188 EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \
4190 EMIT_ONE_BYTE (c1 | 0x80); \
4191 CODING_ISO_SINGLE_SHIFTING (coding) = 0; \
4194 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \
4196 EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \
4199 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \
4201 EMIT_ONE_BYTE (c1 | 0x80); \
4205 /* Since CHARSET is not yet invoked to any graphic planes, we \
4206 must invoke it, or, at first, designate it to some graphic \
4207 register. Then repeat the loop to actually produce the \
4209 dst = encode_invocation_designation (charset, coding, dst, \
4214 /* Produce codes for a DIMENSION2 character whose character set is
4215 CHARSET and whose position-codes are C1 and C2. Designation and
4216 invocation codes are also produced in advance if necessary. */
4218 #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \
4220 int id = CHARSET_ID (charset); \
4222 if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \
4223 && id == charset_jisx0208) \
4225 id = charset_jisx0208_1978; \
4226 charset = CHARSET_FROM_ID (id); \
4229 if (CODING_ISO_SINGLE_SHIFTING (coding)) \
4231 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
4232 EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \
4234 EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \
4235 CODING_ISO_SINGLE_SHIFTING (coding) = 0; \
4238 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \
4240 EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \
4243 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \
4245 EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \
4249 /* Since CHARSET is not yet invoked to any graphic planes, we \
4250 must invoke it, or, at first, designate it to some graphic \
4251 register. Then repeat the loop to actually produce the \
4253 dst = encode_invocation_designation (charset, coding, dst, \
4258 #define ENCODE_ISO_CHARACTER(charset, c) \
4261 CODING_ENCODE_CHAR (coding, dst, dst_end, (charset), (c), code); \
4263 if (CHARSET_DIMENSION (charset) == 1) \
4264 ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \
4266 ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \
4270 /* Produce designation and invocation codes at a place pointed by DST
4271 to use CHARSET. The element `spec.iso_2022' of *CODING is updated.
4274 static unsigned char *
4275 encode_invocation_designation (struct charset
*charset
,
4276 struct coding_system
*coding
,
4277 unsigned char *dst
, ptrdiff_t *p_nchars
)
4279 bool multibytep
= coding
->dst_multibyte
;
4280 ptrdiff_t produced_chars
= *p_nchars
;
4281 int reg
; /* graphic register number */
4282 int id
= CHARSET_ID (charset
);
4284 /* At first, check designations. */
4285 for (reg
= 0; reg
< 4; reg
++)
4286 if (id
== CODING_ISO_DESIGNATION (coding
, reg
))
4291 /* CHARSET is not yet designated to any graphic registers. */
4292 /* At first check the requested designation. */
4293 reg
= CODING_ISO_REQUEST (coding
, id
);
4295 /* Since CHARSET requests no special designation, designate it
4296 to graphic register 0. */
4299 ENCODE_DESIGNATION (charset
, reg
, coding
);
4302 if (CODING_ISO_INVOCATION (coding
, 0) != reg
4303 && CODING_ISO_INVOCATION (coding
, 1) != reg
)
4305 /* Since the graphic register REG is not invoked to any graphic
4306 planes, invoke it to graphic plane 0. */
4309 case 0: /* graphic register 0 */
4313 case 1: /* graphic register 1 */
4317 case 2: /* graphic register 2 */
4318 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
4319 ENCODE_SINGLE_SHIFT_2
;
4321 ENCODE_LOCKING_SHIFT_2
;
4324 case 3: /* graphic register 3 */
4325 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
4326 ENCODE_SINGLE_SHIFT_3
;
4328 ENCODE_LOCKING_SHIFT_3
;
4333 *p_nchars
= produced_chars
;
4338 /* Produce codes for designation and invocation to reset the graphic
4339 planes and registers to initial state. */
4340 #define ENCODE_RESET_PLANE_AND_REGISTER() \
4343 struct charset *charset; \
4345 if (CODING_ISO_INVOCATION (coding, 0) != 0) \
4347 for (reg = 0; reg < 4; reg++) \
4348 if (CODING_ISO_INITIAL (coding, reg) >= 0 \
4349 && (CODING_ISO_DESIGNATION (coding, reg) \
4350 != CODING_ISO_INITIAL (coding, reg))) \
4352 charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \
4353 ENCODE_DESIGNATION (charset, reg, coding); \
4358 /* Produce designation sequences of charsets in the line started from
4359 CHARBUF to a place pointed by DST, and return the number of
4360 produced bytes. DST should not directly point a buffer text area
4361 which may be relocated by char_charset call.
4363 If the current block ends before any end-of-line, we may fail to
4364 find all the necessary designations. */
4367 encode_designation_at_bol (struct coding_system
*coding
,
4368 int *charbuf
, int *charbuf_end
,
4371 unsigned char *orig
= dst
;
4372 struct charset
*charset
;
4373 /* Table of charsets to be designated to each graphic register. */
4375 int c
, found
= 0, reg
;
4376 ptrdiff_t produced_chars
= 0;
4377 bool multibytep
= coding
->dst_multibyte
;
4379 Lisp_Object charset_list
;
4381 attrs
= CODING_ID_ATTRS (coding
->id
);
4382 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
4383 if (EQ (charset_list
, Qiso_2022
))
4384 charset_list
= Viso_2022_charset_list
;
4386 for (reg
= 0; reg
< 4; reg
++)
4389 while (charbuf
< charbuf_end
&& found
< 4)
4396 charset
= char_charset (c
, charset_list
, NULL
);
4397 id
= CHARSET_ID (charset
);
4398 reg
= CODING_ISO_REQUEST (coding
, id
);
4399 if (reg
>= 0 && r
[reg
] < 0)
4408 for (reg
= 0; reg
< 4; reg
++)
4410 && CODING_ISO_DESIGNATION (coding
, reg
) != r
[reg
])
4411 ENCODE_DESIGNATION (CHARSET_FROM_ID (r
[reg
]), reg
, coding
);
4417 /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */
4420 encode_coding_iso_2022 (struct coding_system
*coding
)
4422 bool multibytep
= coding
->dst_multibyte
;
4423 int *charbuf
= coding
->charbuf
;
4424 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4425 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4426 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4428 bool bol_designation
4429 = (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATE_AT_BOL
4430 && CODING_ISO_BOL (coding
));
4431 ptrdiff_t produced_chars
= 0;
4432 Lisp_Object attrs
, eol_type
, charset_list
;
4433 bool ascii_compatible
;
4435 int preferred_charset_id
= -1;
4437 CODING_GET_INFO (coding
, attrs
, charset_list
);
4438 eol_type
= inhibit_eol_conversion
? Qunix
: CODING_ID_EOL_TYPE (coding
->id
);
4439 if (VECTORP (eol_type
))
4442 setup_iso_safe_charsets (attrs
);
4443 /* Charset list may have been changed. */
4444 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
4445 coding
->safe_charsets
= SDATA (CODING_ATTR_SAFE_CHARSETS (attrs
));
4448 = (! NILP (CODING_ATTR_ASCII_COMPAT (attrs
))
4449 && ! (CODING_ISO_FLAGS (coding
) & (CODING_ISO_FLAG_DESIGNATION
4450 | CODING_ISO_FLAG_LOCKING_SHIFT
)));
4452 while (charbuf
< charbuf_end
)
4454 ASSURE_DESTINATION (safe_room
);
4456 if (bol_designation
)
4458 /* We have to produce designation sequences if any now. */
4459 unsigned char desig_buf
[16];
4463 charset_map_loaded
= 0;
4464 nbytes
= encode_designation_at_bol (coding
, charbuf
, charbuf_end
,
4466 if (charset_map_loaded
4467 && (offset
= coding_change_destination (coding
)))
4472 memcpy (dst
, desig_buf
, nbytes
);
4474 /* We are sure that designation sequences are all ASCII bytes. */
4475 produced_chars
+= nbytes
;
4476 bol_designation
= 0;
4477 ASSURE_DESTINATION (safe_room
);
4484 /* Handle an annotation. */
4487 case CODING_ANNOTATE_COMPOSITION_MASK
:
4488 /* Not yet implemented. */
4490 case CODING_ANNOTATE_CHARSET_MASK
:
4491 preferred_charset_id
= charbuf
[2];
4492 if (preferred_charset_id
>= 0
4493 && NILP (Fmemq (make_number (preferred_charset_id
),
4495 preferred_charset_id
= -1;
4504 /* Now encode the character C. */
4505 if (c
< 0x20 || c
== 0x7F)
4508 || (c
== '\r' && EQ (eol_type
, Qmac
)))
4510 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_EOL
)
4511 ENCODE_RESET_PLANE_AND_REGISTER ();
4512 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_INIT_AT_BOL
)
4516 for (i
= 0; i
< 4; i
++)
4517 CODING_ISO_DESIGNATION (coding
, i
)
4518 = CODING_ISO_INITIAL (coding
, i
);
4520 bol_designation
= ((CODING_ISO_FLAGS (coding
)
4521 & CODING_ISO_FLAG_DESIGNATE_AT_BOL
)
4524 else if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_CNTL
)
4525 ENCODE_RESET_PLANE_AND_REGISTER ();
4526 EMIT_ONE_ASCII_BYTE (c
);
4528 else if (ASCII_CHAR_P (c
))
4530 if (ascii_compatible
)
4531 EMIT_ONE_ASCII_BYTE (c
);
4534 struct charset
*charset
= CHARSET_FROM_ID (charset_ascii
);
4535 ENCODE_ISO_CHARACTER (charset
, c
);
4538 else if (CHAR_BYTE8_P (c
))
4540 c
= CHAR_TO_BYTE8 (c
);
4545 struct charset
*charset
;
4547 if (preferred_charset_id
>= 0)
4551 charset
= CHARSET_FROM_ID (preferred_charset_id
);
4552 CODING_CHAR_CHARSET_P (coding
, dst
, dst_end
, c
, charset
, result
);
4554 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
4558 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
4562 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
4564 c
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
4565 charset
= CHARSET_FROM_ID (charset_ascii
);
4569 c
= coding
->default_char
;
4570 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
,
4571 charset_list
, NULL
, charset
);
4574 ENCODE_ISO_CHARACTER (charset
, c
);
4578 if (coding
->mode
& CODING_MODE_LAST_BLOCK
4579 && CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_EOL
)
4581 ASSURE_DESTINATION (safe_room
);
4582 ENCODE_RESET_PLANE_AND_REGISTER ();
4584 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4585 CODING_ISO_BOL (coding
) = bol_designation
;
4586 coding
->produced_char
+= produced_chars
;
4587 coding
->produced
= dst
- coding
->destination
;
4592 /*** 8,9. SJIS and BIG5 handlers ***/
4594 /* Although SJIS and BIG5 are not ISO's coding system, they are used
4595 quite widely. So, for the moment, Emacs supports them in the bare
4596 C code. But, in the future, they may be supported only by CCL. */
4598 /* SJIS is a coding system encoding three character sets: ASCII, right
4599 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
4600 as is. A character of charset katakana-jisx0201 is encoded by
4601 "position-code + 0x80". A character of charset japanese-jisx0208
4602 is encoded in 2-byte but two position-codes are divided and shifted
4603 so that it fit in the range below.
4605 --- CODE RANGE of SJIS ---
4606 (character set) (range)
4608 KATAKANA-JISX0201 0xA0 .. 0xDF
4609 JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF
4610 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
4611 -------------------------------
4615 /* BIG5 is a coding system encoding two character sets: ASCII and
4616 Big5. An ASCII character is encoded as is. Big5 is a two-byte
4617 character set and is encoded in two-byte.
4619 --- CODE RANGE of BIG5 ---
4620 (character set) (range)
4622 Big5 (1st byte) 0xA1 .. 0xFE
4623 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
4624 --------------------------
4628 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
4629 Return true if a text is encoded in SJIS. */
4632 detect_coding_sjis (struct coding_system
*coding
,
4633 struct coding_detection_info
*detect_info
)
4635 const unsigned char *src
= coding
->source
, *src_base
;
4636 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4637 bool multibytep
= coding
->src_multibyte
;
4638 ptrdiff_t consumed_chars
= 0;
4641 Lisp_Object attrs
, charset_list
;
4642 int max_first_byte_of_2_byte_code
;
4644 CODING_GET_INFO (coding
, attrs
, charset_list
);
4645 max_first_byte_of_2_byte_code
4646 = (XINT (Flength (charset_list
)) > 3 ? 0xFC : 0xEF);
4648 detect_info
->checked
|= CATEGORY_MASK_SJIS
;
4649 /* A coding system of this category is always ASCII compatible. */
4650 src
+= coding
->head_ascii
;
4658 if ((c
>= 0x81 && c
<= 0x9F)
4659 || (c
>= 0xE0 && c
<= max_first_byte_of_2_byte_code
))
4662 if (c
< 0x40 || c
== 0x7F || c
> 0xFC)
4664 found
= CATEGORY_MASK_SJIS
;
4666 else if (c
>= 0xA0 && c
< 0xE0)
4667 found
= CATEGORY_MASK_SJIS
;
4671 detect_info
->rejected
|= CATEGORY_MASK_SJIS
;
4675 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
4677 detect_info
->rejected
|= CATEGORY_MASK_SJIS
;
4680 detect_info
->found
|= found
;
4684 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
4685 Return true if a text is encoded in BIG5. */
4688 detect_coding_big5 (struct coding_system
*coding
,
4689 struct coding_detection_info
*detect_info
)
4691 const unsigned char *src
= coding
->source
, *src_base
;
4692 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4693 bool multibytep
= coding
->src_multibyte
;
4694 ptrdiff_t consumed_chars
= 0;
4698 detect_info
->checked
|= CATEGORY_MASK_BIG5
;
4699 /* A coding system of this category is always ASCII compatible. */
4700 src
+= coding
->head_ascii
;
4711 if (c
< 0x40 || (c
>= 0x7F && c
<= 0xA0))
4713 found
= CATEGORY_MASK_BIG5
;
4718 detect_info
->rejected
|= CATEGORY_MASK_BIG5
;
4722 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
4724 detect_info
->rejected
|= CATEGORY_MASK_BIG5
;
4727 detect_info
->found
|= found
;
4731 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
4734 decode_coding_sjis (struct coding_system
*coding
)
4736 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4737 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4738 const unsigned char *src_base
;
4739 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4740 /* We may produce one charset annotation in one loop and one more at
4743 = coding
->charbuf
+ coding
->charbuf_size
- (MAX_ANNOTATION_LENGTH
* 2);
4744 ptrdiff_t consumed_chars
= 0, consumed_chars_base
;
4745 bool multibytep
= coding
->src_multibyte
;
4746 struct charset
*charset_roman
, *charset_kanji
, *charset_kana
;
4747 struct charset
*charset_kanji2
;
4748 Lisp_Object attrs
, charset_list
, val
;
4749 ptrdiff_t char_offset
= coding
->produced_char
;
4750 ptrdiff_t last_offset
= char_offset
;
4751 int last_id
= charset_ascii
;
4753 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
4754 int byte_after_cr
= -1;
4756 CODING_GET_INFO (coding
, attrs
, charset_list
);
4759 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4760 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4761 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4762 charset_kanji2
= NILP (val
) ? NULL
: CHARSET_FROM_ID (XINT (XCAR (val
)));
4767 struct charset
*charset
;
4770 consumed_chars_base
= consumed_chars
;
4772 if (charbuf
>= charbuf_end
)
4774 if (byte_after_cr
>= 0)
4779 if (byte_after_cr
>= 0)
4780 c
= byte_after_cr
, byte_after_cr
= -1;
4787 if (eol_dos
&& c
== '\r')
4788 ONE_MORE_BYTE (byte_after_cr
);
4789 charset
= charset_roman
;
4791 else if (c
== 0x80 || c
== 0xA0)
4793 else if (c
>= 0xA1 && c
<= 0xDF)
4795 /* SJIS -> JISX0201-Kana */
4797 charset
= charset_kana
;
4801 /* SJIS -> JISX0208 */
4803 if (c1
< 0x40 || c1
== 0x7F || c1
> 0xFC)
4807 charset
= charset_kanji
;
4809 else if (c
<= 0xFC && charset_kanji2
)
4811 /* SJIS -> JISX0213-2 */
4813 if (c1
< 0x40 || c1
== 0x7F || c1
> 0xFC)
4817 charset
= charset_kanji2
;
4821 if (charset
->id
!= charset_ascii
4822 && last_id
!= charset
->id
)
4824 if (last_id
!= charset_ascii
)
4825 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4826 last_id
= charset
->id
;
4827 last_offset
= char_offset
;
4829 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c
, c
);
4836 consumed_chars
= consumed_chars_base
;
4838 *charbuf
++ = c
< 0 ? -c
: BYTE8_TO_CHAR (c
);
4844 if (last_id
!= charset_ascii
)
4845 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4846 coding
->consumed_char
+= consumed_chars_base
;
4847 coding
->consumed
= src_base
- coding
->source
;
4848 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4852 decode_coding_big5 (struct coding_system
*coding
)
4854 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4855 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4856 const unsigned char *src_base
;
4857 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4858 /* We may produce one charset annotation in one loop and one more at
4861 = coding
->charbuf
+ coding
->charbuf_size
- (MAX_ANNOTATION_LENGTH
* 2);
4862 ptrdiff_t consumed_chars
= 0, consumed_chars_base
;
4863 bool multibytep
= coding
->src_multibyte
;
4864 struct charset
*charset_roman
, *charset_big5
;
4865 Lisp_Object attrs
, charset_list
, val
;
4866 ptrdiff_t char_offset
= coding
->produced_char
;
4867 ptrdiff_t last_offset
= char_offset
;
4868 int last_id
= charset_ascii
;
4870 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
4871 int byte_after_cr
= -1;
4873 CODING_GET_INFO (coding
, attrs
, charset_list
);
4875 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4876 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
4881 struct charset
*charset
;
4884 consumed_chars_base
= consumed_chars
;
4886 if (charbuf
>= charbuf_end
)
4888 if (byte_after_cr
>= 0)
4893 if (byte_after_cr
>= 0)
4894 c
= byte_after_cr
, byte_after_cr
= -1;
4902 if (eol_dos
&& c
== '\r')
4903 ONE_MORE_BYTE (byte_after_cr
);
4904 charset
= charset_roman
;
4909 if (c
< 0xA1 || c
> 0xFE)
4912 if (c1
< 0x40 || (c1
> 0x7E && c1
< 0xA1) || c1
> 0xFE)
4915 charset
= charset_big5
;
4917 if (charset
->id
!= charset_ascii
4918 && last_id
!= charset
->id
)
4920 if (last_id
!= charset_ascii
)
4921 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4922 last_id
= charset
->id
;
4923 last_offset
= char_offset
;
4925 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c
, c
);
4932 consumed_chars
= consumed_chars_base
;
4934 *charbuf
++ = c
< 0 ? -c
: BYTE8_TO_CHAR (c
);
4940 if (last_id
!= charset_ascii
)
4941 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4942 coding
->consumed_char
+= consumed_chars_base
;
4943 coding
->consumed
= src_base
- coding
->source
;
4944 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4947 /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions".
4948 This function can encode charsets `ascii', `katakana-jisx0201',
4949 `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We
4950 are sure that all these charsets are registered as official charset
4951 (i.e. do not have extended leading-codes). Characters of other
4952 charsets are produced without any encoding. */
4955 encode_coding_sjis (struct coding_system
*coding
)
4957 bool multibytep
= coding
->dst_multibyte
;
4958 int *charbuf
= coding
->charbuf
;
4959 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4960 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4961 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4963 ptrdiff_t produced_chars
= 0;
4964 Lisp_Object attrs
, charset_list
, val
;
4965 bool ascii_compatible
;
4966 struct charset
*charset_kanji
, *charset_kana
;
4967 struct charset
*charset_kanji2
;
4970 CODING_GET_INFO (coding
, attrs
, charset_list
);
4971 val
= XCDR (charset_list
);
4972 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4973 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4974 charset_kanji2
= NILP (val
) ? NULL
: CHARSET_FROM_ID (XINT (XCAR (val
)));
4976 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
4978 while (charbuf
< charbuf_end
)
4980 ASSURE_DESTINATION (safe_room
);
4982 /* Now encode the character C. */
4983 if (ASCII_CHAR_P (c
) && ascii_compatible
)
4984 EMIT_ONE_ASCII_BYTE (c
);
4985 else if (CHAR_BYTE8_P (c
))
4987 c
= CHAR_TO_BYTE8 (c
);
4993 struct charset
*charset
;
4994 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
4999 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
5001 code
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
5002 charset
= CHARSET_FROM_ID (charset_ascii
);
5006 c
= coding
->default_char
;
5007 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
,
5008 charset_list
, &code
, charset
);
5011 if (code
== CHARSET_INVALID_CODE (charset
))
5013 if (charset
== charset_kanji
)
5017 c1
= code
>> 8, c2
= code
& 0xFF;
5018 EMIT_TWO_BYTES (c1
, c2
);
5020 else if (charset
== charset_kana
)
5021 EMIT_ONE_BYTE (code
| 0x80);
5022 else if (charset_kanji2
&& charset
== charset_kanji2
)
5027 if (c1
== 0x21 || (c1
>= 0x23 && c1
<= 0x25)
5029 || (c1
>= 0x2C && c1
<= 0x2F) || c1
>= 0x6E)
5031 JIS_TO_SJIS2 (code
);
5032 c1
= code
>> 8, c2
= code
& 0xFF;
5033 EMIT_TWO_BYTES (c1
, c2
);
5036 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
5039 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
5042 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5043 coding
->produced_char
+= produced_chars
;
5044 coding
->produced
= dst
- coding
->destination
;
5049 encode_coding_big5 (struct coding_system
*coding
)
5051 bool multibytep
= coding
->dst_multibyte
;
5052 int *charbuf
= coding
->charbuf
;
5053 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
5054 unsigned char *dst
= coding
->destination
+ coding
->produced
;
5055 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
5057 ptrdiff_t produced_chars
= 0;
5058 Lisp_Object attrs
, charset_list
, val
;
5059 bool ascii_compatible
;
5060 struct charset
*charset_big5
;
5063 CODING_GET_INFO (coding
, attrs
, charset_list
);
5064 val
= XCDR (charset_list
);
5065 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
5066 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
5068 while (charbuf
< charbuf_end
)
5070 ASSURE_DESTINATION (safe_room
);
5072 /* Now encode the character C. */
5073 if (ASCII_CHAR_P (c
) && ascii_compatible
)
5074 EMIT_ONE_ASCII_BYTE (c
);
5075 else if (CHAR_BYTE8_P (c
))
5077 c
= CHAR_TO_BYTE8 (c
);
5083 struct charset
*charset
;
5084 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
5089 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
5091 code
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
5092 charset
= CHARSET_FROM_ID (charset_ascii
);
5096 c
= coding
->default_char
;
5097 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
,
5098 charset_list
, &code
, charset
);
5101 if (code
== CHARSET_INVALID_CODE (charset
))
5103 if (charset
== charset_big5
)
5107 c1
= code
>> 8, c2
= code
& 0xFF;
5108 EMIT_TWO_BYTES (c1
, c2
);
5111 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
5114 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5115 coding
->produced_char
+= produced_chars
;
5116 coding
->produced
= dst
- coding
->destination
;
5121 /*** 10. CCL handlers ***/
5123 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
5124 Return true if a text is encoded in a coding system of which
5125 encoder/decoder are written in CCL program. */
5128 detect_coding_ccl (struct coding_system
*coding
,
5129 struct coding_detection_info
*detect_info
)
5131 const unsigned char *src
= coding
->source
, *src_base
;
5132 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
5133 bool multibytep
= coding
->src_multibyte
;
5134 ptrdiff_t consumed_chars
= 0;
5136 unsigned char *valids
;
5137 ptrdiff_t head_ascii
= coding
->head_ascii
;
5140 detect_info
->checked
|= CATEGORY_MASK_CCL
;
5142 coding
= &coding_categories
[coding_category_ccl
];
5143 valids
= CODING_CCL_VALIDS (coding
);
5144 attrs
= CODING_ID_ATTRS (coding
->id
);
5145 if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
5154 if (c
< 0 || ! valids
[c
])
5156 if ((valids
[c
] > 1))
5157 found
= CATEGORY_MASK_CCL
;
5159 detect_info
->rejected
|= CATEGORY_MASK_CCL
;
5163 detect_info
->found
|= found
;
5168 decode_coding_ccl (struct coding_system
*coding
)
5170 const unsigned char *src
= coding
->source
+ coding
->consumed
;
5171 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
5172 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
5173 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
5174 ptrdiff_t consumed_chars
= 0;
5175 bool multibytep
= coding
->src_multibyte
;
5176 struct ccl_program
*ccl
= &coding
->spec
.ccl
->ccl
;
5177 int source_charbuf
[1024];
5178 int source_byteidx
[1025];
5179 Lisp_Object attrs
, charset_list
;
5181 CODING_GET_INFO (coding
, attrs
, charset_list
);
5185 const unsigned char *p
= src
;
5191 while (i
< 1024 && p
< src_end
)
5193 source_byteidx
[i
] = p
- src
;
5194 source_charbuf
[i
++] = STRING_CHAR_ADVANCE (p
);
5196 source_byteidx
[i
] = p
- src
;
5199 while (i
< 1024 && p
< src_end
)
5200 source_charbuf
[i
++] = *p
++;
5202 if (p
== src_end
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
5203 ccl
->last_block
= true;
5204 /* As ccl_driver calls DECODE_CHAR, buffer may be relocated. */
5205 charset_map_loaded
= 0;
5206 ccl_driver (ccl
, source_charbuf
, charbuf
, i
, charbuf_end
- charbuf
,
5208 if (charset_map_loaded
5209 && (offset
= coding_change_source (coding
)))
5215 charbuf
+= ccl
->produced
;
5217 src
+= source_byteidx
[ccl
->consumed
];
5219 src
+= ccl
->consumed
;
5220 consumed_chars
+= ccl
->consumed
;
5221 if (p
== src_end
|| ccl
->status
!= CCL_STAT_SUSPEND_BY_SRC
)
5225 switch (ccl
->status
)
5227 case CCL_STAT_SUSPEND_BY_SRC
:
5228 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
5230 case CCL_STAT_SUSPEND_BY_DST
:
5231 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_DST
);
5234 case CCL_STAT_INVALID_CMD
:
5235 record_conversion_result (coding
, CODING_RESULT_INTERRUPT
);
5238 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5241 coding
->consumed_char
+= consumed_chars
;
5242 coding
->consumed
= src
- coding
->source
;
5243 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
5247 encode_coding_ccl (struct coding_system
*coding
)
5249 struct ccl_program
*ccl
= &coding
->spec
.ccl
->ccl
;
5250 bool multibytep
= coding
->dst_multibyte
;
5251 int *charbuf
= coding
->charbuf
;
5252 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
5253 unsigned char *dst
= coding
->destination
+ coding
->produced
;
5254 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
5255 int destination_charbuf
[1024];
5256 ptrdiff_t produced_chars
= 0;
5258 Lisp_Object attrs
, charset_list
;
5260 CODING_GET_INFO (coding
, attrs
, charset_list
);
5261 if (coding
->consumed_char
== coding
->src_chars
5262 && coding
->mode
& CODING_MODE_LAST_BLOCK
)
5263 ccl
->last_block
= true;
5269 /* As ccl_driver calls DECODE_CHAR, buffer may be relocated. */
5270 charset_map_loaded
= 0;
5271 ccl_driver (ccl
, charbuf
, destination_charbuf
,
5272 charbuf_end
- charbuf
, 1024, charset_list
);
5273 if (charset_map_loaded
5274 && (offset
= coding_change_destination (coding
)))
5278 ASSURE_DESTINATION (ccl
->produced
* 2);
5279 for (i
= 0; i
< ccl
->produced
; i
++)
5280 EMIT_ONE_BYTE (destination_charbuf
[i
] & 0xFF);
5284 ASSURE_DESTINATION (ccl
->produced
);
5285 for (i
= 0; i
< ccl
->produced
; i
++)
5286 *dst
++ = destination_charbuf
[i
] & 0xFF;
5287 produced_chars
+= ccl
->produced
;
5289 charbuf
+= ccl
->consumed
;
5290 if (ccl
->status
== CCL_STAT_QUIT
5291 || ccl
->status
== CCL_STAT_INVALID_CMD
)
5294 while (charbuf
< charbuf_end
);
5296 switch (ccl
->status
)
5298 case CCL_STAT_SUSPEND_BY_SRC
:
5299 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
5301 case CCL_STAT_SUSPEND_BY_DST
:
5302 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_DST
);
5305 case CCL_STAT_INVALID_CMD
:
5306 record_conversion_result (coding
, CODING_RESULT_INTERRUPT
);
5309 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5313 coding
->produced_char
+= produced_chars
;
5314 coding
->produced
= dst
- coding
->destination
;
5319 /*** 10, 11. no-conversion handlers ***/
5321 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
5324 decode_coding_raw_text (struct coding_system
*coding
)
5327 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
5329 coding
->chars_at_source
= 1;
5330 coding
->consumed_char
= coding
->src_chars
;
5331 coding
->consumed
= coding
->src_bytes
;
5332 if (eol_dos
&& coding
->source
[coding
->src_bytes
- 1] == '\r')
5334 coding
->consumed_char
--;
5336 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
5339 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5343 encode_coding_raw_text (struct coding_system
*coding
)
5345 bool multibytep
= coding
->dst_multibyte
;
5346 int *charbuf
= coding
->charbuf
;
5347 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_used
;
5348 unsigned char *dst
= coding
->destination
+ coding
->produced
;
5349 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
5350 ptrdiff_t produced_chars
= 0;
5355 int safe_room
= MAX_MULTIBYTE_LENGTH
* 2;
5357 if (coding
->src_multibyte
)
5358 while (charbuf
< charbuf_end
)
5360 ASSURE_DESTINATION (safe_room
);
5362 if (ASCII_CHAR_P (c
))
5363 EMIT_ONE_ASCII_BYTE (c
);
5364 else if (CHAR_BYTE8_P (c
))
5366 c
= CHAR_TO_BYTE8 (c
);
5371 unsigned char str
[MAX_MULTIBYTE_LENGTH
], *p0
= str
, *p1
= str
;
5373 CHAR_STRING_ADVANCE (c
, p1
);
5376 EMIT_ONE_BYTE (*p0
);
5383 while (charbuf
< charbuf_end
)
5385 ASSURE_DESTINATION (safe_room
);
5392 if (coding
->src_multibyte
)
5394 int safe_room
= MAX_MULTIBYTE_LENGTH
;
5396 while (charbuf
< charbuf_end
)
5398 ASSURE_DESTINATION (safe_room
);
5400 if (ASCII_CHAR_P (c
))
5402 else if (CHAR_BYTE8_P (c
))
5403 *dst
++ = CHAR_TO_BYTE8 (c
);
5405 CHAR_STRING_ADVANCE (c
, dst
);
5410 ASSURE_DESTINATION (charbuf_end
- charbuf
);
5411 while (charbuf
< charbuf_end
&& dst
< dst_end
)
5412 *dst
++ = *charbuf
++;
5414 produced_chars
= dst
- (coding
->destination
+ coding
->produced
);
5416 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5417 coding
->produced_char
+= produced_chars
;
5418 coding
->produced
= dst
- coding
->destination
;
5422 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
5423 Return true if a text is encoded in a charset-based coding system. */
5426 detect_coding_charset (struct coding_system
*coding
,
5427 struct coding_detection_info
*detect_info
)
5429 const unsigned char *src
= coding
->source
, *src_base
;
5430 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
5431 bool multibytep
= coding
->src_multibyte
;
5432 ptrdiff_t consumed_chars
= 0;
5433 Lisp_Object attrs
, valids
, name
;
5435 ptrdiff_t head_ascii
= coding
->head_ascii
;
5436 bool check_latin_extra
= 0;
5438 detect_info
->checked
|= CATEGORY_MASK_CHARSET
;
5440 coding
= &coding_categories
[coding_category_charset
];
5441 attrs
= CODING_ID_ATTRS (coding
->id
);
5442 valids
= AREF (attrs
, coding_attr_charset_valids
);
5443 name
= CODING_ID_NAME (coding
->id
);
5444 if (strncmp (SSDATA (SYMBOL_NAME (name
)),
5445 "iso-8859-", sizeof ("iso-8859-") - 1) == 0
5446 || strncmp (SSDATA (SYMBOL_NAME (name
)),
5447 "iso-latin-", sizeof ("iso-latin-") - 1) == 0)
5448 check_latin_extra
= 1;
5450 if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
5457 struct charset
*charset
;
5464 val
= AREF (valids
, c
);
5470 && check_latin_extra
5471 && (!VECTORP (Vlatin_extra_code_table
)
5472 || NILP (AREF (Vlatin_extra_code_table
, c
))))
5474 found
= CATEGORY_MASK_CHARSET
;
5478 charset
= CHARSET_FROM_ID (XFASTINT (val
));
5479 dim
= CHARSET_DIMENSION (charset
);
5480 for (idx
= 1; idx
< dim
; idx
++)
5485 if (c
< charset
->code_space
[(dim
- 1 - idx
) * 4]
5486 || c
> charset
->code_space
[(dim
- 1 - idx
) * 4 + 1])
5495 for (; CONSP (val
); val
= XCDR (val
))
5497 charset
= CHARSET_FROM_ID (XFASTINT (XCAR (val
)));
5498 dim
= CHARSET_DIMENSION (charset
);
5504 if (c
< charset
->code_space
[(dim
- 1 - idx
) * 4]
5505 || c
> charset
->code_space
[(dim
- 1 - idx
) * 4 + 1])
5520 detect_info
->rejected
|= CATEGORY_MASK_CHARSET
;
5524 detect_info
->found
|= found
;
5529 decode_coding_charset (struct coding_system
*coding
)
5531 const unsigned char *src
= coding
->source
+ coding
->consumed
;
5532 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
5533 const unsigned char *src_base
;
5534 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
5535 /* We may produce one charset annotation in one loop and one more at
5538 = coding
->charbuf
+ coding
->charbuf_size
- (MAX_ANNOTATION_LENGTH
* 2);
5539 ptrdiff_t consumed_chars
= 0, consumed_chars_base
;
5540 bool multibytep
= coding
->src_multibyte
;
5541 Lisp_Object attrs
= CODING_ID_ATTRS (coding
->id
);
5543 ptrdiff_t char_offset
= coding
->produced_char
;
5544 ptrdiff_t last_offset
= char_offset
;
5545 int last_id
= charset_ascii
;
5547 = !inhibit_eol_conversion
&& EQ (CODING_ID_EOL_TYPE (coding
->id
), Qdos
);
5548 int byte_after_cr
= -1;
5550 valids
= AREF (attrs
, coding_attr_charset_valids
);
5556 struct charset
*charset
;
5562 consumed_chars_base
= consumed_chars
;
5564 if (charbuf
>= charbuf_end
)
5566 if (byte_after_cr
>= 0)
5571 if (byte_after_cr
>= 0)
5579 if (eol_dos
&& c
== '\r')
5580 ONE_MORE_BYTE (byte_after_cr
);
5586 val
= AREF (valids
, c
);
5587 if (! INTEGERP (val
) && ! CONSP (val
))
5591 charset
= CHARSET_FROM_ID (XFASTINT (val
));
5592 dim
= CHARSET_DIMENSION (charset
);
5596 code
= (code
<< 8) | c
;
5599 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
,
5604 /* VAL is a list of charset IDs. It is assured that the
5605 list is sorted by charset dimensions (smaller one
5609 charset
= CHARSET_FROM_ID (XFASTINT (XCAR (val
)));
5610 dim
= CHARSET_DIMENSION (charset
);
5614 code
= (code
<< 8) | c
;
5617 CODING_DECODE_CHAR (coding
, src
, src_base
,
5618 src_end
, charset
, code
, c
);
5626 if (charset
->id
!= charset_ascii
5627 && last_id
!= charset
->id
)
5629 if (last_id
!= charset_ascii
)
5630 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
5631 last_id
= charset
->id
;
5632 last_offset
= char_offset
;
5641 consumed_chars
= consumed_chars_base
;
5643 *charbuf
++ = c
< 0 ? -c
: ASCII_CHAR_P (c
) ? c
: BYTE8_TO_CHAR (c
);
5649 if (last_id
!= charset_ascii
)
5650 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
5651 coding
->consumed_char
+= consumed_chars_base
;
5652 coding
->consumed
= src_base
- coding
->source
;
5653 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
5657 encode_coding_charset (struct coding_system
*coding
)
5659 bool multibytep
= coding
->dst_multibyte
;
5660 int *charbuf
= coding
->charbuf
;
5661 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
5662 unsigned char *dst
= coding
->destination
+ coding
->produced
;
5663 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
5664 int safe_room
= MAX_MULTIBYTE_LENGTH
;
5665 ptrdiff_t produced_chars
= 0;
5666 Lisp_Object attrs
, charset_list
;
5667 bool ascii_compatible
;
5670 CODING_GET_INFO (coding
, attrs
, charset_list
);
5671 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
5673 while (charbuf
< charbuf_end
)
5675 struct charset
*charset
;
5678 ASSURE_DESTINATION (safe_room
);
5680 if (ascii_compatible
&& ASCII_CHAR_P (c
))
5681 EMIT_ONE_ASCII_BYTE (c
);
5682 else if (CHAR_BYTE8_P (c
))
5684 c
= CHAR_TO_BYTE8 (c
);
5689 CODING_CHAR_CHARSET (coding
, dst
, dst_end
, c
, charset_list
,
5694 if (CHARSET_DIMENSION (charset
) == 1)
5695 EMIT_ONE_BYTE (code
);
5696 else if (CHARSET_DIMENSION (charset
) == 2)
5697 EMIT_TWO_BYTES (code
>> 8, code
& 0xFF);
5698 else if (CHARSET_DIMENSION (charset
) == 3)
5699 EMIT_THREE_BYTES (code
>> 16, (code
>> 8) & 0xFF, code
& 0xFF);
5701 EMIT_FOUR_BYTES (code
>> 24, (code
>> 16) & 0xFF,
5702 (code
>> 8) & 0xFF, code
& 0xFF);
5706 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
5707 c
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
5709 c
= coding
->default_char
;
5715 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
5716 coding
->produced_char
+= produced_chars
;
5717 coding
->produced
= dst
- coding
->destination
;
5722 /*** 7. C library functions ***/
5724 /* Setup coding context CODING from information about CODING_SYSTEM.
5725 If CODING_SYSTEM is nil, `no-conversion' is assumed. If
5726 CODING_SYSTEM is invalid, signal an error. */
5729 setup_coding_system (Lisp_Object coding_system
, struct coding_system
*coding
)
5732 Lisp_Object eol_type
;
5733 Lisp_Object coding_type
;
5736 if (NILP (coding_system
))
5737 coding_system
= Qundecided
;
5739 CHECK_CODING_SYSTEM_GET_ID (coding_system
, coding
->id
);
5741 attrs
= CODING_ID_ATTRS (coding
->id
);
5742 eol_type
= inhibit_eol_conversion
? Qunix
: CODING_ID_EOL_TYPE (coding
->id
);
5745 if (VECTORP (eol_type
))
5746 coding
->common_flags
= (CODING_REQUIRE_DECODING_MASK
5747 | CODING_REQUIRE_DETECTION_MASK
);
5748 else if (! EQ (eol_type
, Qunix
))
5749 coding
->common_flags
= (CODING_REQUIRE_DECODING_MASK
5750 | CODING_REQUIRE_ENCODING_MASK
);
5752 coding
->common_flags
= 0;
5753 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
5754 coding
->common_flags
|= CODING_REQUIRE_DECODING_MASK
;
5755 if (! NILP (CODING_ATTR_PRE_WRITE (attrs
)))
5756 coding
->common_flags
|= CODING_REQUIRE_ENCODING_MASK
;
5757 if (! NILP (CODING_ATTR_FOR_UNIBYTE (attrs
)))
5758 coding
->common_flags
|= CODING_FOR_UNIBYTE_MASK
;
5760 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
5761 coding
->max_charset_id
= SCHARS (val
) - 1;
5762 coding
->safe_charsets
= SDATA (val
);
5763 coding
->default_char
= XINT (CODING_ATTR_DEFAULT_CHAR (attrs
));
5764 coding
->carryover_bytes
= 0;
5765 coding
->raw_destination
= 0;
5767 coding_type
= CODING_ATTR_TYPE (attrs
);
5768 if (EQ (coding_type
, Qundecided
))
5770 coding
->detector
= NULL
;
5771 coding
->decoder
= decode_coding_raw_text
;
5772 coding
->encoder
= encode_coding_raw_text
;
5773 coding
->common_flags
|= CODING_REQUIRE_DETECTION_MASK
;
5774 coding
->spec
.undecided
.inhibit_nbd
5775 = (encode_inhibit_flag
5776 (AREF (attrs
, coding_attr_undecided_inhibit_null_byte_detection
)));
5777 coding
->spec
.undecided
.inhibit_ied
5778 = (encode_inhibit_flag
5779 (AREF (attrs
, coding_attr_undecided_inhibit_iso_escape_detection
)));
5780 coding
->spec
.undecided
.prefer_utf_8
5781 = ! NILP (AREF (attrs
, coding_attr_undecided_prefer_utf_8
));
5783 else if (EQ (coding_type
, Qiso_2022
))
5786 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
5788 /* Invoke graphic register 0 to plane 0. */
5789 CODING_ISO_INVOCATION (coding
, 0) = 0;
5790 /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */
5791 CODING_ISO_INVOCATION (coding
, 1)
5792 = (flags
& CODING_ISO_FLAG_SEVEN_BITS
? -1 : 1);
5793 /* Setup the initial status of designation. */
5794 for (i
= 0; i
< 4; i
++)
5795 CODING_ISO_DESIGNATION (coding
, i
) = CODING_ISO_INITIAL (coding
, i
);
5796 /* Not single shifting initially. */
5797 CODING_ISO_SINGLE_SHIFTING (coding
) = 0;
5798 /* Beginning of buffer should also be regarded as bol. */
5799 CODING_ISO_BOL (coding
) = 1;
5800 coding
->detector
= detect_coding_iso_2022
;
5801 coding
->decoder
= decode_coding_iso_2022
;
5802 coding
->encoder
= encode_coding_iso_2022
;
5803 if (flags
& CODING_ISO_FLAG_SAFE
)
5804 coding
->mode
|= CODING_MODE_SAFE_ENCODING
;
5805 coding
->common_flags
5806 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
5807 | CODING_REQUIRE_FLUSHING_MASK
);
5808 if (flags
& CODING_ISO_FLAG_COMPOSITION
)
5809 coding
->common_flags
|= CODING_ANNOTATE_COMPOSITION_MASK
;
5810 if (flags
& CODING_ISO_FLAG_DESIGNATION
)
5811 coding
->common_flags
|= CODING_ANNOTATE_CHARSET_MASK
;
5812 if (flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
5814 setup_iso_safe_charsets (attrs
);
5815 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
5816 coding
->max_charset_id
= SCHARS (val
) - 1;
5817 coding
->safe_charsets
= SDATA (val
);
5819 CODING_ISO_FLAGS (coding
) = flags
;
5820 CODING_ISO_CMP_STATUS (coding
)->state
= COMPOSING_NO
;
5821 CODING_ISO_CMP_STATUS (coding
)->method
= COMPOSITION_NO
;
5822 CODING_ISO_EXTSEGMENT_LEN (coding
) = 0;
5823 CODING_ISO_EMBEDDED_UTF_8 (coding
) = 0;
5825 else if (EQ (coding_type
, Qcharset
))
5827 coding
->detector
= detect_coding_charset
;
5828 coding
->decoder
= decode_coding_charset
;
5829 coding
->encoder
= encode_coding_charset
;
5830 coding
->common_flags
5831 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5833 else if (EQ (coding_type
, Qutf_8
))
5835 val
= AREF (attrs
, coding_attr_utf_bom
);
5836 CODING_UTF_8_BOM (coding
) = (CONSP (val
) ? utf_detect_bom
5837 : EQ (val
, Qt
) ? utf_with_bom
5839 coding
->detector
= detect_coding_utf_8
;
5840 coding
->decoder
= decode_coding_utf_8
;
5841 coding
->encoder
= encode_coding_utf_8
;
5842 coding
->common_flags
5843 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5844 if (CODING_UTF_8_BOM (coding
) == utf_detect_bom
)
5845 coding
->common_flags
|= CODING_REQUIRE_DETECTION_MASK
;
5847 else if (EQ (coding_type
, Qutf_16
))
5849 val
= AREF (attrs
, coding_attr_utf_bom
);
5850 CODING_UTF_16_BOM (coding
) = (CONSP (val
) ? utf_detect_bom
5851 : EQ (val
, Qt
) ? utf_with_bom
5853 val
= AREF (attrs
, coding_attr_utf_16_endian
);
5854 CODING_UTF_16_ENDIAN (coding
) = (EQ (val
, Qbig
) ? utf_16_big_endian
5855 : utf_16_little_endian
);
5856 CODING_UTF_16_SURROGATE (coding
) = 0;
5857 coding
->detector
= detect_coding_utf_16
;
5858 coding
->decoder
= decode_coding_utf_16
;
5859 coding
->encoder
= encode_coding_utf_16
;
5860 coding
->common_flags
5861 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5862 if (CODING_UTF_16_BOM (coding
) == utf_detect_bom
)
5863 coding
->common_flags
|= CODING_REQUIRE_DETECTION_MASK
;
5865 else if (EQ (coding_type
, Qccl
))
5867 coding
->detector
= detect_coding_ccl
;
5868 coding
->decoder
= decode_coding_ccl
;
5869 coding
->encoder
= encode_coding_ccl
;
5870 coding
->common_flags
5871 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
5872 | CODING_REQUIRE_FLUSHING_MASK
);
5874 else if (EQ (coding_type
, Qemacs_mule
))
5876 coding
->detector
= detect_coding_emacs_mule
;
5877 coding
->decoder
= decode_coding_emacs_mule
;
5878 coding
->encoder
= encode_coding_emacs_mule
;
5879 coding
->common_flags
5880 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5881 if (! NILP (AREF (attrs
, coding_attr_emacs_mule_full
))
5882 && ! EQ (CODING_ATTR_CHARSET_LIST (attrs
), Vemacs_mule_charset_list
))
5884 Lisp_Object tail
, safe_charsets
;
5885 int max_charset_id
= 0;
5887 for (tail
= Vemacs_mule_charset_list
; CONSP (tail
);
5889 if (max_charset_id
< XFASTINT (XCAR (tail
)))
5890 max_charset_id
= XFASTINT (XCAR (tail
));
5891 safe_charsets
= make_uninit_string (max_charset_id
+ 1);
5892 memset (SDATA (safe_charsets
), 255, max_charset_id
+ 1);
5893 for (tail
= Vemacs_mule_charset_list
; CONSP (tail
);
5895 SSET (safe_charsets
, XFASTINT (XCAR (tail
)), 0);
5896 coding
->max_charset_id
= max_charset_id
;
5897 coding
->safe_charsets
= SDATA (safe_charsets
);
5899 coding
->spec
.emacs_mule
.cmp_status
.state
= COMPOSING_NO
;
5900 coding
->spec
.emacs_mule
.cmp_status
.method
= COMPOSITION_NO
;
5902 else if (EQ (coding_type
, Qshift_jis
))
5904 coding
->detector
= detect_coding_sjis
;
5905 coding
->decoder
= decode_coding_sjis
;
5906 coding
->encoder
= encode_coding_sjis
;
5907 coding
->common_flags
5908 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5910 else if (EQ (coding_type
, Qbig5
))
5912 coding
->detector
= detect_coding_big5
;
5913 coding
->decoder
= decode_coding_big5
;
5914 coding
->encoder
= encode_coding_big5
;
5915 coding
->common_flags
5916 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5918 else /* EQ (coding_type, Qraw_text) */
5920 coding
->detector
= NULL
;
5921 coding
->decoder
= decode_coding_raw_text
;
5922 coding
->encoder
= encode_coding_raw_text
;
5923 if (! EQ (eol_type
, Qunix
))
5925 coding
->common_flags
|= CODING_REQUIRE_DECODING_MASK
;
5926 if (! VECTORP (eol_type
))
5927 coding
->common_flags
|= CODING_REQUIRE_ENCODING_MASK
;
5935 /* Return a list of charsets supported by CODING. */
5938 coding_charset_list (struct coding_system
*coding
)
5940 Lisp_Object attrs
, charset_list
;
5942 CODING_GET_INFO (coding
, attrs
, charset_list
);
5943 if (EQ (CODING_ATTR_TYPE (attrs
), Qiso_2022
))
5945 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
5947 if (flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
5948 charset_list
= Viso_2022_charset_list
;
5950 else if (EQ (CODING_ATTR_TYPE (attrs
), Qemacs_mule
))
5952 charset_list
= Vemacs_mule_charset_list
;
5954 return charset_list
;
5958 /* Return a list of charsets supported by CODING-SYSTEM. */
5961 coding_system_charset_list (Lisp_Object coding_system
)
5964 Lisp_Object attrs
, charset_list
;
5966 CHECK_CODING_SYSTEM_GET_ID (coding_system
, id
);
5967 attrs
= CODING_ID_ATTRS (id
);
5969 if (EQ (CODING_ATTR_TYPE (attrs
), Qiso_2022
))
5971 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
5973 if (flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
5974 charset_list
= Viso_2022_charset_list
;
5976 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
5978 else if (EQ (CODING_ATTR_TYPE (attrs
), Qemacs_mule
))
5980 charset_list
= Vemacs_mule_charset_list
;
5984 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
5986 return charset_list
;
5990 /* Return raw-text or one of its subsidiaries that has the same
5991 eol_type as CODING-SYSTEM. */
5994 raw_text_coding_system (Lisp_Object coding_system
)
5996 Lisp_Object spec
, attrs
;
5997 Lisp_Object eol_type
, raw_text_eol_type
;
5999 if (NILP (coding_system
))
6001 spec
= CODING_SYSTEM_SPEC (coding_system
);
6002 attrs
= AREF (spec
, 0);
6004 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
6005 return coding_system
;
6007 eol_type
= AREF (spec
, 2);
6008 if (VECTORP (eol_type
))
6010 spec
= CODING_SYSTEM_SPEC (Qraw_text
);
6011 raw_text_eol_type
= AREF (spec
, 2);
6012 return (EQ (eol_type
, Qunix
) ? AREF (raw_text_eol_type
, 0)
6013 : EQ (eol_type
, Qdos
) ? AREF (raw_text_eol_type
, 1)
6014 : AREF (raw_text_eol_type
, 2));
6018 /* If CODING_SYSTEM doesn't specify end-of-line format, return one of
6019 the subsidiary that has the same eol-spec as PARENT (if it is not
6020 nil and specifies end-of-line format) or the system's setting
6021 (system_eol_type). */
6024 coding_inherit_eol_type (Lisp_Object coding_system
, Lisp_Object parent
)
6026 Lisp_Object spec
, eol_type
;
6028 if (NILP (coding_system
))
6029 coding_system
= Qraw_text
;
6030 spec
= CODING_SYSTEM_SPEC (coding_system
);
6031 eol_type
= AREF (spec
, 2);
6032 if (VECTORP (eol_type
))
6034 Lisp_Object parent_eol_type
;
6036 if (! NILP (parent
))
6038 Lisp_Object parent_spec
;
6040 parent_spec
= CODING_SYSTEM_SPEC (parent
);
6041 parent_eol_type
= AREF (parent_spec
, 2);
6042 if (VECTORP (parent_eol_type
))
6043 parent_eol_type
= system_eol_type
;
6046 parent_eol_type
= system_eol_type
;
6047 if (EQ (parent_eol_type
, Qunix
))
6048 coding_system
= AREF (eol_type
, 0);
6049 else if (EQ (parent_eol_type
, Qdos
))
6050 coding_system
= AREF (eol_type
, 1);
6051 else if (EQ (parent_eol_type
, Qmac
))
6052 coding_system
= AREF (eol_type
, 2);
6054 return coding_system
;
6058 /* Check if text-conversion and eol-conversion of CODING_SYSTEM are
6059 decided for writing to a process. If not, complement them, and
6060 return a new coding system. */
6063 complement_process_encoding_system (Lisp_Object coding_system
)
6065 Lisp_Object coding_base
= Qnil
, eol_base
= Qnil
;
6066 Lisp_Object spec
, attrs
;
6069 for (i
= 0; i
< 3; i
++)
6072 coding_system
= CDR_SAFE (Vdefault_process_coding_system
);
6074 coding_system
= preferred_coding_system ();
6075 spec
= CODING_SYSTEM_SPEC (coding_system
);
6078 attrs
= AREF (spec
, 0);
6079 if (NILP (coding_base
) && ! EQ (CODING_ATTR_TYPE (attrs
), Qundecided
))
6080 coding_base
= CODING_ATTR_BASE_NAME (attrs
);
6081 if (NILP (eol_base
) && ! VECTORP (AREF (spec
, 2)))
6082 eol_base
= coding_system
;
6083 if (! NILP (coding_base
) && ! NILP (eol_base
))
6088 /* The original CODING_SYSTEM didn't specify text-conversion or
6089 eol-conversion. Be sure that we return a fully complemented
6091 coding_system
= coding_inherit_eol_type (coding_base
, eol_base
);
6092 return coding_system
;
6096 /* Emacs has a mechanism to automatically detect a coding system if it
6097 is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But,
6098 it's impossible to distinguish some coding systems accurately
6099 because they use the same range of codes. So, at first, coding
6100 systems are categorized into 7, those are:
6102 o coding-category-emacs-mule
6104 The category for a coding system which has the same code range
6105 as Emacs' internal format. Assigned the coding-system (Lisp
6106 symbol) `emacs-mule' by default.
6108 o coding-category-sjis
6110 The category for a coding system which has the same code range
6111 as SJIS. Assigned the coding-system (Lisp
6112 symbol) `japanese-shift-jis' by default.
6114 o coding-category-iso-7
6116 The category for a coding system which has the same code range
6117 as ISO2022 of 7-bit environment. This doesn't use any locking
6118 shift and single shift functions. This can encode/decode all
6119 charsets. Assigned the coding-system (Lisp symbol)
6120 `iso-2022-7bit' by default.
6122 o coding-category-iso-7-tight
6124 Same as coding-category-iso-7 except that this can
6125 encode/decode only the specified charsets.
6127 o coding-category-iso-8-1
6129 The category for a coding system which has the same code range
6130 as ISO2022 of 8-bit environment and graphic plane 1 used only
6131 for DIMENSION1 charset. This doesn't use any locking shift
6132 and single shift functions. Assigned the coding-system (Lisp
6133 symbol) `iso-latin-1' by default.
6135 o coding-category-iso-8-2
6137 The category for a coding system which has the same code range
6138 as ISO2022 of 8-bit environment and graphic plane 1 used only
6139 for DIMENSION2 charset. This doesn't use any locking shift
6140 and single shift functions. Assigned the coding-system (Lisp
6141 symbol) `japanese-iso-8bit' by default.
6143 o coding-category-iso-7-else
6145 The category for a coding system which has the same code range
6146 as ISO2022 of 7-bit environment but uses locking shift or
6147 single shift functions. Assigned the coding-system (Lisp
6148 symbol) `iso-2022-7bit-lock' by default.
6150 o coding-category-iso-8-else
6152 The category for a coding system which has the same code range
6153 as ISO2022 of 8-bit environment but uses locking shift or
6154 single shift functions. Assigned the coding-system (Lisp
6155 symbol) `iso-2022-8bit-ss2' by default.
6157 o coding-category-big5
6159 The category for a coding system which has the same code range
6160 as BIG5. Assigned the coding-system (Lisp symbol)
6161 `cn-big5' by default.
6163 o coding-category-utf-8
6165 The category for a coding system which has the same code range
6166 as UTF-8 (cf. RFC3629). Assigned the coding-system (Lisp
6167 symbol) `utf-8' by default.
6169 o coding-category-utf-16-be
6171 The category for a coding system in which a text has an
6172 Unicode signature (cf. Unicode Standard) in the order of BIG
6173 endian at the head. Assigned the coding-system (Lisp symbol)
6174 `utf-16-be' by default.
6176 o coding-category-utf-16-le
6178 The category for a coding system in which a text has an
6179 Unicode signature (cf. Unicode Standard) in the order of
6180 LITTLE endian at the head. Assigned the coding-system (Lisp
6181 symbol) `utf-16-le' by default.
6183 o coding-category-ccl
6185 The category for a coding system of which encoder/decoder is
6186 written in CCL programs. The default value is nil, i.e., no
6187 coding system is assigned.
6189 o coding-category-binary
6191 The category for a coding system not categorized in any of the
6192 above. Assigned the coding-system (Lisp symbol)
6193 `no-conversion' by default.
6195 Each of them is a Lisp symbol and the value is an actual
6196 `coding-system's (this is also a Lisp symbol) assigned by a user.
6197 What Emacs does actually is to detect a category of coding system.
6198 Then, it uses a `coding-system' assigned to it. If Emacs can't
6199 decide only one possible category, it selects a category of the
6200 highest priority. Priorities of categories are also specified by a
6201 user in a Lisp variable `coding-category-list'.
6205 static Lisp_Object
adjust_coding_eol_type (struct coding_system
*coding
,
6209 /* Return the number of ASCII characters at the head of the source.
6210 By side effects, set coding->head_ascii and update
6211 coding->eol_seen. The value of coding->eol_seen is "logical or" of
6212 EOL_SEEN_LF, EOL_SEEN_CR, and EOL_SEEN_CRLF, but the value is
6213 reliable only when all the source bytes are ASCII. */
6216 check_ascii (struct coding_system
*coding
)
6218 const unsigned char *src
, *end
;
6219 Lisp_Object eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
6220 int eol_seen
= coding
->eol_seen
;
6222 coding_set_source (coding
);
6223 src
= coding
->source
;
6224 end
= src
+ coding
->src_bytes
;
6226 if (inhibit_eol_conversion
6227 || SYMBOLP (eol_type
))
6229 /* We don't have to check EOL format. */
6230 while (src
< end
&& !( *src
& 0x80))
6233 eol_seen
|= EOL_SEEN_LF
;
6238 end
--; /* We look ahead one byte for "CR LF". */
6250 eol_seen
|= EOL_SEEN_CRLF
;
6254 eol_seen
|= EOL_SEEN_CR
;
6257 eol_seen
|= EOL_SEEN_LF
;
6263 /* All bytes but the last one C are ASCII. */
6267 eol_seen
|= EOL_SEEN_CR
;
6269 eol_seen
|= EOL_SEEN_LF
;
6274 coding
->head_ascii
= src
- coding
->source
;
6275 coding
->eol_seen
= eol_seen
;
6276 return (coding
->head_ascii
);
6280 /* Return the number of characters at the source if all the bytes are
6281 valid UTF-8 (of Unicode range). Otherwise, return -1. By side
6282 effects, update coding->eol_seen. The value of coding->eol_seen is
6283 "logical or" of EOL_SEEN_LF, EOL_SEEN_CR, and EOL_SEEN_CRLF, but
6284 the value is reliable only when all the source bytes are valid
6288 check_utf_8 (struct coding_system
*coding
)
6290 const unsigned char *src
, *end
;
6292 ptrdiff_t nchars
= coding
->head_ascii
;
6294 if (coding
->head_ascii
< 0)
6295 check_ascii (coding
);
6297 coding_set_source (coding
);
6298 src
= coding
->source
+ coding
->head_ascii
;
6299 /* We look ahead one byte for CR LF. */
6300 end
= coding
->source
+ coding
->src_bytes
- 1;
6301 eol_seen
= coding
->eol_seen
;
6306 if (UTF_8_1_OCTET_P (*src
))
6315 eol_seen
|= EOL_SEEN_CRLF
;
6320 eol_seen
|= EOL_SEEN_CR
;
6323 eol_seen
|= EOL_SEEN_LF
;
6326 else if (UTF_8_2_OCTET_LEADING_P (c
))
6328 if (c
< 0xC2 /* overlong sequence */
6330 || ! UTF_8_EXTRA_OCTET_P (src
[1]))
6334 else if (UTF_8_3_OCTET_LEADING_P (c
))
6337 || ! (UTF_8_EXTRA_OCTET_P (src
[1])
6338 && UTF_8_EXTRA_OCTET_P (src
[2])))
6340 c
= (((c
& 0xF) << 12)
6341 | ((src
[1] & 0x3F) << 6) | (src
[2] & 0x3F));
6342 if (c
< 0x800 /* overlong sequence */
6343 || (c
>= 0xd800 && c
< 0xe000)) /* surrogates (invalid) */
6347 else if (UTF_8_4_OCTET_LEADING_P (c
))
6350 || ! (UTF_8_EXTRA_OCTET_P (src
[1])
6351 && UTF_8_EXTRA_OCTET_P (src
[2])
6352 && UTF_8_EXTRA_OCTET_P (src
[3])))
6354 c
= (((c
& 0x7) << 18) | ((src
[1] & 0x3F) << 12)
6355 | ((src
[2] & 0x3F) << 6) | (src
[3] & 0x3F));
6356 if (c
< 0x10000 /* overlong sequence */
6357 || c
>= 0x110000) /* non-Unicode character */
6368 if (! UTF_8_1_OCTET_P (*src
))
6372 eol_seen
|= EOL_SEEN_CR
;
6373 else if (*src
== '\n')
6374 eol_seen
|= EOL_SEEN_LF
;
6376 coding
->eol_seen
= eol_seen
;
6381 /* Detect how end-of-line of a text of length SRC_BYTES pointed by
6382 SOURCE is encoded. If CATEGORY is one of
6383 coding_category_utf_16_XXXX, assume that CR and LF are encoded by
6384 two-byte, else they are encoded by one-byte.
6386 Return one of EOL_SEEN_XXX. */
6388 #define MAX_EOL_CHECK_COUNT 3
6391 detect_eol (const unsigned char *source
, ptrdiff_t src_bytes
,
6392 enum coding_category category
)
6394 const unsigned char *src
= source
, *src_end
= src
+ src_bytes
;
6397 int eol_seen
= EOL_SEEN_NONE
;
6399 if ((1 << category
) & CATEGORY_MASK_UTF_16
)
6401 bool msb
= category
== (coding_category_utf_16_le
6402 | coding_category_utf_16_le_nosig
);
6405 while (src
+ 1 < src_end
)
6408 if (src
[msb
] == 0 && (c
== '\n' || c
== '\r'))
6413 this_eol
= EOL_SEEN_LF
;
6414 else if (src
+ 3 >= src_end
6415 || src
[msb
+ 2] != 0
6416 || src
[lsb
+ 2] != '\n')
6417 this_eol
= EOL_SEEN_CR
;
6420 this_eol
= EOL_SEEN_CRLF
;
6424 if (eol_seen
== EOL_SEEN_NONE
)
6425 /* This is the first end-of-line. */
6426 eol_seen
= this_eol
;
6427 else if (eol_seen
!= this_eol
)
6429 /* The found type is different from what found before.
6430 Allow for stray ^M characters in DOS EOL files. */
6431 if ((eol_seen
== EOL_SEEN_CR
&& this_eol
== EOL_SEEN_CRLF
)
6432 || (eol_seen
== EOL_SEEN_CRLF
6433 && this_eol
== EOL_SEEN_CR
))
6434 eol_seen
= EOL_SEEN_CRLF
;
6437 eol_seen
= EOL_SEEN_LF
;
6441 if (++total
== MAX_EOL_CHECK_COUNT
)
6448 while (src
< src_end
)
6451 if (c
== '\n' || c
== '\r')
6456 this_eol
= EOL_SEEN_LF
;
6457 else if (src
>= src_end
|| *src
!= '\n')
6458 this_eol
= EOL_SEEN_CR
;
6460 this_eol
= EOL_SEEN_CRLF
, src
++;
6462 if (eol_seen
== EOL_SEEN_NONE
)
6463 /* This is the first end-of-line. */
6464 eol_seen
= this_eol
;
6465 else if (eol_seen
!= this_eol
)
6467 /* The found type is different from what found before.
6468 Allow for stray ^M characters in DOS EOL files. */
6469 if ((eol_seen
== EOL_SEEN_CR
&& this_eol
== EOL_SEEN_CRLF
)
6470 || (eol_seen
== EOL_SEEN_CRLF
&& this_eol
== EOL_SEEN_CR
))
6471 eol_seen
= EOL_SEEN_CRLF
;
6474 eol_seen
= EOL_SEEN_LF
;
6478 if (++total
== MAX_EOL_CHECK_COUNT
)
6487 adjust_coding_eol_type (struct coding_system
*coding
, int eol_seen
)
6489 Lisp_Object eol_type
;
6491 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
6492 if (! VECTORP (eol_type
))
6493 /* Already adjusted. */
6495 if (eol_seen
& EOL_SEEN_LF
)
6497 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 0));
6500 else if (eol_seen
& EOL_SEEN_CRLF
)
6502 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 1));
6505 else if (eol_seen
& EOL_SEEN_CR
)
6507 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 2));
6513 /* Detect how a text specified in CODING is encoded. If a coding
6514 system is detected, update fields of CODING by the detected coding
6518 detect_coding (struct coding_system
*coding
)
6520 const unsigned char *src
, *src_end
;
6521 unsigned int saved_mode
= coding
->mode
;
6522 Lisp_Object found
= Qnil
;
6523 Lisp_Object eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
6525 coding
->consumed
= coding
->consumed_char
= 0;
6526 coding
->produced
= coding
->produced_char
= 0;
6527 coding_set_source (coding
);
6529 src_end
= coding
->source
+ coding
->src_bytes
;
6531 coding
->eol_seen
= EOL_SEEN_NONE
;
6532 /* If we have not yet decided the text encoding type, detect it
6534 if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding
->id
)), Qundecided
))
6537 struct coding_detection_info detect_info
;
6538 bool null_byte_found
= 0, eight_bit_found
= 0;
6539 bool inhibit_nbd
= inhibit_flag (coding
->spec
.undecided
.inhibit_nbd
,
6540 inhibit_null_byte_detection
);
6541 bool inhibit_ied
= inhibit_flag (coding
->spec
.undecided
.inhibit_ied
,
6542 inhibit_iso_escape_detection
);
6543 bool prefer_utf_8
= coding
->spec
.undecided
.prefer_utf_8
;
6545 coding
->head_ascii
= 0;
6546 detect_info
.checked
= detect_info
.found
= detect_info
.rejected
= 0;
6547 for (src
= coding
->source
; src
< src_end
; src
++)
6552 eight_bit_found
= 1;
6553 if (null_byte_found
)
6558 if ((c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
)
6560 && ! detect_info
.checked
)
6562 if (detect_coding_iso_2022 (coding
, &detect_info
))
6564 /* We have scanned the whole data. */
6565 if (! (detect_info
.rejected
& CATEGORY_MASK_ISO_7_ELSE
))
6567 /* We didn't find an 8-bit code. We may
6568 have found a null-byte, but it's very
6569 rare that a binary file conforms to
6572 coding
->head_ascii
= src
- coding
->source
;
6574 detect_info
.rejected
|= ~CATEGORY_MASK_ISO_ESCAPE
;
6578 else if (! c
&& !inhibit_nbd
)
6580 null_byte_found
= 1;
6581 if (eight_bit_found
)
6584 else if (! disable_ascii_optimization
6585 && ! inhibit_eol_conversion
)
6589 if (src
< src_end
&& src
[1] == '\n')
6591 coding
->eol_seen
|= EOL_SEEN_CRLF
;
6593 if (! eight_bit_found
)
6594 coding
->head_ascii
++;
6597 coding
->eol_seen
|= EOL_SEEN_CR
;
6601 coding
->eol_seen
|= EOL_SEEN_LF
;
6605 if (! eight_bit_found
)
6606 coding
->head_ascii
++;
6608 else if (! eight_bit_found
)
6609 coding
->head_ascii
++;
6612 if (null_byte_found
|| eight_bit_found
6613 || coding
->head_ascii
< coding
->src_bytes
6614 || detect_info
.found
)
6616 enum coding_category category
;
6617 struct coding_system
*this;
6619 if (coding
->head_ascii
== coding
->src_bytes
)
6620 /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */
6621 for (i
= 0; i
< coding_category_raw_text
; i
++)
6623 category
= coding_priorities
[i
];
6624 this = coding_categories
+ category
;
6625 if (detect_info
.found
& (1 << category
))
6630 if (null_byte_found
)
6632 detect_info
.checked
|= ~CATEGORY_MASK_UTF_16
;
6633 detect_info
.rejected
|= ~CATEGORY_MASK_UTF_16
;
6635 else if (prefer_utf_8
6636 && detect_coding_utf_8 (coding
, &detect_info
))
6638 detect_info
.checked
|= ~CATEGORY_MASK_UTF_8
;
6639 detect_info
.rejected
|= ~CATEGORY_MASK_UTF_8
;
6641 for (i
= 0; i
< coding_category_raw_text
; i
++)
6643 category
= coding_priorities
[i
];
6644 this = coding_categories
+ category
;
6645 /* Some of this->detector (e.g. detect_coding_sjis)
6646 require this information. */
6647 coding
->id
= this->id
;
6650 /* No coding system of this category is defined. */
6651 detect_info
.rejected
|= (1 << category
);
6653 else if (category
>= coding_category_raw_text
)
6655 else if (detect_info
.checked
& (1 << category
))
6657 if (detect_info
.found
& (1 << category
))
6660 else if ((*(this->detector
)) (coding
, &detect_info
)
6661 && detect_info
.found
& (1 << category
))
6666 if (i
< coding_category_raw_text
)
6668 if (category
== coding_category_utf_8_auto
)
6670 Lisp_Object coding_systems
;
6672 coding_systems
= AREF (CODING_ID_ATTRS (this->id
),
6673 coding_attr_utf_bom
);
6674 if (CONSP (coding_systems
))
6676 if (detect_info
.found
& CATEGORY_MASK_UTF_8_SIG
)
6677 found
= XCAR (coding_systems
);
6679 found
= XCDR (coding_systems
);
6682 found
= CODING_ID_NAME (this->id
);
6684 else if (category
== coding_category_utf_16_auto
)
6686 Lisp_Object coding_systems
;
6688 coding_systems
= AREF (CODING_ID_ATTRS (this->id
),
6689 coding_attr_utf_bom
);
6690 if (CONSP (coding_systems
))
6692 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
6693 found
= XCAR (coding_systems
);
6694 else if (detect_info
.found
& CATEGORY_MASK_UTF_16_BE
)
6695 found
= XCDR (coding_systems
);
6698 found
= CODING_ID_NAME (this->id
);
6701 found
= CODING_ID_NAME (this->id
);
6703 else if (null_byte_found
)
6704 found
= Qno_conversion
;
6705 else if ((detect_info
.rejected
& CATEGORY_MASK_ANY
)
6706 == CATEGORY_MASK_ANY
)
6708 else if (detect_info
.rejected
)
6709 for (i
= 0; i
< coding_category_raw_text
; i
++)
6710 if (! (detect_info
.rejected
& (1 << coding_priorities
[i
])))
6712 this = coding_categories
+ coding_priorities
[i
];
6713 found
= CODING_ID_NAME (this->id
);
6718 else if (XINT (CODING_ATTR_CATEGORY (CODING_ID_ATTRS (coding
->id
)))
6719 == coding_category_utf_8_auto
)
6721 Lisp_Object coding_systems
;
6722 struct coding_detection_info detect_info
;
6725 = AREF (CODING_ID_ATTRS (coding
->id
), coding_attr_utf_bom
);
6726 detect_info
.found
= detect_info
.rejected
= 0;
6727 if (check_ascii (coding
) == coding
->src_bytes
)
6729 if (CONSP (coding_systems
))
6730 found
= XCDR (coding_systems
);
6734 if (CONSP (coding_systems
)
6735 && detect_coding_utf_8 (coding
, &detect_info
))
6737 if (detect_info
.found
& CATEGORY_MASK_UTF_8_SIG
)
6738 found
= XCAR (coding_systems
);
6740 found
= XCDR (coding_systems
);
6744 else if (XINT (CODING_ATTR_CATEGORY (CODING_ID_ATTRS (coding
->id
)))
6745 == coding_category_utf_16_auto
)
6747 Lisp_Object coding_systems
;
6748 struct coding_detection_info detect_info
;
6751 = AREF (CODING_ID_ATTRS (coding
->id
), coding_attr_utf_bom
);
6752 detect_info
.found
= detect_info
.rejected
= 0;
6753 coding
->head_ascii
= 0;
6754 if (CONSP (coding_systems
)
6755 && detect_coding_utf_16 (coding
, &detect_info
))
6757 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
6758 found
= XCAR (coding_systems
);
6759 else if (detect_info
.found
& CATEGORY_MASK_UTF_16_BE
)
6760 found
= XCDR (coding_systems
);
6766 int specified_eol
= (VECTORP (eol_type
) ? EOL_SEEN_NONE
6767 : EQ (eol_type
, Qdos
) ? EOL_SEEN_CRLF
6768 : EQ (eol_type
, Qmac
) ? EOL_SEEN_CR
6771 setup_coding_system (found
, coding
);
6772 if (specified_eol
!= EOL_SEEN_NONE
)
6773 adjust_coding_eol_type (coding
, specified_eol
);
6776 coding
->mode
= saved_mode
;
6781 decode_eol (struct coding_system
*coding
)
6783 Lisp_Object eol_type
;
6784 unsigned char *p
, *pbeg
, *pend
;
6786 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
6787 if (EQ (eol_type
, Qunix
) || inhibit_eol_conversion
)
6790 if (NILP (coding
->dst_object
))
6791 pbeg
= coding
->destination
;
6793 pbeg
= BYTE_POS_ADDR (coding
->dst_pos_byte
);
6794 pend
= pbeg
+ coding
->produced
;
6796 if (VECTORP (eol_type
))
6798 int eol_seen
= EOL_SEEN_NONE
;
6800 for (p
= pbeg
; p
< pend
; p
++)
6803 eol_seen
|= EOL_SEEN_LF
;
6804 else if (*p
== '\r')
6806 if (p
+ 1 < pend
&& *(p
+ 1) == '\n')
6808 eol_seen
|= EOL_SEEN_CRLF
;
6812 eol_seen
|= EOL_SEEN_CR
;
6815 /* Handle DOS-style EOLs in a file with stray ^M characters. */
6816 if ((eol_seen
& EOL_SEEN_CRLF
) != 0
6817 && (eol_seen
& EOL_SEEN_CR
) != 0
6818 && (eol_seen
& EOL_SEEN_LF
) == 0)
6819 eol_seen
= EOL_SEEN_CRLF
;
6820 else if (eol_seen
!= EOL_SEEN_NONE
6821 && eol_seen
!= EOL_SEEN_LF
6822 && eol_seen
!= EOL_SEEN_CRLF
6823 && eol_seen
!= EOL_SEEN_CR
)
6824 eol_seen
= EOL_SEEN_LF
;
6825 if (eol_seen
!= EOL_SEEN_NONE
)
6826 eol_type
= adjust_coding_eol_type (coding
, eol_seen
);
6829 if (EQ (eol_type
, Qmac
))
6831 for (p
= pbeg
; p
< pend
; p
++)
6835 else if (EQ (eol_type
, Qdos
))
6839 if (NILP (coding
->dst_object
))
6841 /* Start deleting '\r' from the tail to minimize the memory
6843 for (p
= pend
- 2; p
>= pbeg
; p
--)
6846 memmove (p
, p
+ 1, pend
-- - p
- 1);
6852 ptrdiff_t pos_byte
= coding
->dst_pos_byte
;
6853 ptrdiff_t pos
= coding
->dst_pos
;
6854 ptrdiff_t pos_end
= pos
+ coding
->produced_char
- 1;
6856 while (pos
< pos_end
)
6858 p
= BYTE_POS_ADDR (pos_byte
);
6859 if (*p
== '\r' && p
[1] == '\n')
6861 del_range_2 (pos
, pos_byte
, pos
+ 1, pos_byte
+ 1, 0);
6866 if (coding
->dst_multibyte
)
6867 pos_byte
+= BYTES_BY_CHAR_HEAD (*p
);
6872 coding
->produced
-= n
;
6873 coding
->produced_char
-= n
;
6878 /* Return a translation table (or list of them) from coding system
6879 attribute vector ATTRS for encoding (if ENCODEP) or decoding (if
6883 get_translation_table (Lisp_Object attrs
, bool encodep
, int *max_lookup
)
6885 Lisp_Object standard
, translation_table
;
6888 if (NILP (Venable_character_translation
))
6895 translation_table
= CODING_ATTR_ENCODE_TBL (attrs
),
6896 standard
= Vstandard_translation_table_for_encode
;
6898 translation_table
= CODING_ATTR_DECODE_TBL (attrs
),
6899 standard
= Vstandard_translation_table_for_decode
;
6900 if (NILP (translation_table
))
6901 translation_table
= standard
;
6904 if (SYMBOLP (translation_table
))
6905 translation_table
= Fget (translation_table
, Qtranslation_table
);
6906 else if (CONSP (translation_table
))
6908 translation_table
= Fcopy_sequence (translation_table
);
6909 for (val
= translation_table
; CONSP (val
); val
= XCDR (val
))
6910 if (SYMBOLP (XCAR (val
)))
6911 XSETCAR (val
, Fget (XCAR (val
), Qtranslation_table
));
6913 if (CHAR_TABLE_P (standard
))
6915 if (CONSP (translation_table
))
6916 translation_table
= nconc2 (translation_table
, list1 (standard
));
6918 translation_table
= list2 (translation_table
, standard
);
6925 if (CHAR_TABLE_P (translation_table
)
6926 && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (translation_table
)) > 1)
6928 val
= XCHAR_TABLE (translation_table
)->extras
[1];
6929 if (NATNUMP (val
) && *max_lookup
< XFASTINT (val
))
6930 *max_lookup
= XFASTINT (val
);
6932 else if (CONSP (translation_table
))
6936 for (tail
= translation_table
; CONSP (tail
); tail
= XCDR (tail
))
6937 if (CHAR_TABLE_P (XCAR (tail
))
6938 && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (XCAR (tail
))) > 1)
6940 Lisp_Object tailval
= XCHAR_TABLE (XCAR (tail
))->extras
[1];
6941 if (NATNUMP (tailval
) && *max_lookup
< XFASTINT (tailval
))
6942 *max_lookup
= XFASTINT (tailval
);
6946 return translation_table
;
6949 #define LOOKUP_TRANSLATION_TABLE(table, c, trans) \
6952 if (CHAR_TABLE_P (table)) \
6954 trans = CHAR_TABLE_REF (table, c); \
6955 if (CHARACTERP (trans)) \
6956 c = XFASTINT (trans), trans = Qnil; \
6958 else if (CONSP (table)) \
6962 for (tail = table; CONSP (tail); tail = XCDR (tail)) \
6963 if (CHAR_TABLE_P (XCAR (tail))) \
6965 trans = CHAR_TABLE_REF (XCAR (tail), c); \
6966 if (CHARACTERP (trans)) \
6967 c = XFASTINT (trans), trans = Qnil; \
6968 else if (! NILP (trans)) \
6975 /* Return a translation of character(s) at BUF according to TRANS.
6976 TRANS is TO-CHAR or ((FROM . TO) ...) where
6977 FROM = [FROM-CHAR ...], TO is TO-CHAR or [TO-CHAR ...].
6978 The return value is TO-CHAR or ([FROM-CHAR ...] . TO) if a
6979 translation is found, and Qnil if not found..
6980 If BUF is too short to lookup characters in FROM, return Qt. */
6983 get_translation (Lisp_Object trans
, int *buf
, int *buf_end
)
6986 if (INTEGERP (trans
))
6988 for (; CONSP (trans
); trans
= XCDR (trans
))
6990 Lisp_Object val
= XCAR (trans
);
6991 Lisp_Object from
= XCAR (val
);
6992 ptrdiff_t len
= ASIZE (from
);
6995 for (i
= 0; i
< len
; i
++)
6997 if (buf
+ i
== buf_end
)
6999 if (XINT (AREF (from
, i
)) != buf
[i
])
7010 produce_chars (struct coding_system
*coding
, Lisp_Object translation_table
,
7013 unsigned char *dst
= coding
->destination
+ coding
->produced
;
7014 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
7016 ptrdiff_t produced_chars
= 0;
7019 if (! coding
->chars_at_source
)
7021 /* Source characters are in coding->charbuf. */
7022 int *buf
= coding
->charbuf
;
7023 int *buf_end
= buf
+ coding
->charbuf_used
;
7025 if (EQ (coding
->src_object
, coding
->dst_object
))
7027 coding_set_source (coding
);
7028 dst_end
= ((unsigned char *) coding
->source
) + coding
->consumed
;
7031 while (buf
< buf_end
)
7038 ptrdiff_t from_nchars
= 1, to_nchars
= 1;
7039 Lisp_Object trans
= Qnil
;
7041 LOOKUP_TRANSLATION_TABLE (translation_table
, c
, trans
);
7044 trans
= get_translation (trans
, buf
, buf_end
);
7045 if (INTEGERP (trans
))
7047 else if (CONSP (trans
))
7049 from_nchars
= ASIZE (XCAR (trans
));
7050 trans
= XCDR (trans
);
7051 if (INTEGERP (trans
))
7055 to_nchars
= ASIZE (trans
);
7056 c
= XINT (AREF (trans
, 0));
7059 else if (EQ (trans
, Qt
) && ! last_block
)
7063 if ((dst_end
- dst
) / MAX_MULTIBYTE_LENGTH
< to_nchars
)
7065 if (((min (PTRDIFF_MAX
, SIZE_MAX
) - (buf_end
- buf
))
7066 / MAX_MULTIBYTE_LENGTH
)
7068 memory_full (SIZE_MAX
);
7069 dst
= alloc_destination (coding
,
7071 + MAX_MULTIBYTE_LENGTH
* to_nchars
,
7073 if (EQ (coding
->src_object
, coding
->dst_object
))
7075 coding_set_source (coding
);
7076 dst_end
= (((unsigned char *) coding
->source
)
7077 + coding
->consumed
);
7080 dst_end
= coding
->destination
+ coding
->dst_bytes
;
7083 for (i
= 0; i
< to_nchars
; i
++)
7086 c
= XINT (AREF (trans
, i
));
7087 if (coding
->dst_multibyte
7088 || ! CHAR_BYTE8_P (c
))
7089 CHAR_STRING_ADVANCE_NO_UNIFY (c
, dst
);
7091 *dst
++ = CHAR_TO_BYTE8 (c
);
7093 produced_chars
+= to_nchars
;
7097 /* This is an annotation datum. (-C) is the length. */
7100 carryover
= buf_end
- buf
;
7104 /* Source characters are at coding->source. */
7105 const unsigned char *src
= coding
->source
;
7106 const unsigned char *src_end
= src
+ coding
->consumed
;
7108 if (EQ (coding
->dst_object
, coding
->src_object
))
7109 dst_end
= (unsigned char *) src
;
7110 if (coding
->src_multibyte
!= coding
->dst_multibyte
)
7112 if (coding
->src_multibyte
)
7114 bool multibytep
= 1;
7115 ptrdiff_t consumed_chars
= 0;
7119 const unsigned char *src_base
= src
;
7125 if (EQ (coding
->src_object
, coding
->dst_object
))
7126 dst_end
= (unsigned char *) src
;
7129 ptrdiff_t offset
= src
- coding
->source
;
7131 dst
= alloc_destination (coding
, src_end
- src
+ 1,
7133 dst_end
= coding
->destination
+ coding
->dst_bytes
;
7134 coding_set_source (coding
);
7135 src
= coding
->source
+ offset
;
7136 src_end
= coding
->source
+ coding
->consumed
;
7137 if (EQ (coding
->src_object
, coding
->dst_object
))
7138 dst_end
= (unsigned char *) src
;
7148 while (src
< src_end
)
7150 bool multibytep
= 1;
7153 if (dst
>= dst_end
- 1)
7155 if (EQ (coding
->src_object
, coding
->dst_object
))
7156 dst_end
= (unsigned char *) src
;
7157 if (dst
>= dst_end
- 1)
7159 ptrdiff_t offset
= src
- coding
->source
;
7160 ptrdiff_t more_bytes
;
7162 if (EQ (coding
->src_object
, coding
->dst_object
))
7163 more_bytes
= ((src_end
- src
) / 2) + 2;
7165 more_bytes
= src_end
- src
+ 2;
7166 dst
= alloc_destination (coding
, more_bytes
, dst
);
7167 dst_end
= coding
->destination
+ coding
->dst_bytes
;
7168 coding_set_source (coding
);
7169 src
= coding
->source
+ offset
;
7170 src_end
= coding
->source
+ coding
->consumed
;
7171 if (EQ (coding
->src_object
, coding
->dst_object
))
7172 dst_end
= (unsigned char *) src
;
7180 if (!EQ (coding
->src_object
, coding
->dst_object
))
7182 ptrdiff_t require
= coding
->src_bytes
- coding
->dst_bytes
;
7186 ptrdiff_t offset
= src
- coding
->source
;
7188 dst
= alloc_destination (coding
, require
, dst
);
7189 coding_set_source (coding
);
7190 src
= coding
->source
+ offset
;
7191 src_end
= coding
->source
+ coding
->consumed
;
7194 produced_chars
= coding
->consumed_char
;
7195 while (src
< src_end
)
7200 produced
= dst
- (coding
->destination
+ coding
->produced
);
7201 if (BUFFERP (coding
->dst_object
) && produced_chars
> 0)
7202 insert_from_gap (produced_chars
, produced
, 0);
7203 coding
->produced
+= produced
;
7204 coding
->produced_char
+= produced_chars
;
7208 /* Compose text in CODING->object according to the annotation data at
7209 CHARBUF. CHARBUF is an array:
7210 [ -LENGTH ANNOTATION_MASK NCHARS NBYTES METHOD [ COMPONENTS... ] ]
7214 produce_composition (struct coding_system
*coding
, int *charbuf
, ptrdiff_t pos
)
7218 enum composition_method method
;
7219 Lisp_Object components
;
7221 len
= -charbuf
[0] - MAX_ANNOTATION_LENGTH
;
7222 to
= pos
+ charbuf
[2];
7223 method
= (enum composition_method
) (charbuf
[4]);
7225 if (method
== COMPOSITION_RELATIVE
)
7229 Lisp_Object args
[MAX_COMPOSITION_COMPONENTS
* 2 - 1];
7232 if (method
== COMPOSITION_WITH_RULE
)
7233 len
= charbuf
[2] * 3 - 2;
7234 charbuf
+= MAX_ANNOTATION_LENGTH
;
7235 /* charbuf = [ CHRA ... CHAR] or [ CHAR -2 RULE ... CHAR ] */
7236 for (i
= j
= 0; i
< len
&& charbuf
[i
] != -1; i
++, j
++)
7238 if (charbuf
[i
] >= 0)
7239 args
[j
] = make_number (charbuf
[i
]);
7243 args
[j
] = make_number (charbuf
[i
] % 0x100);
7246 components
= (i
== j
? Fstring (j
, args
) : Fvector (j
, args
));
7248 compose_text (pos
, to
, components
, Qnil
, coding
->dst_object
);
7252 /* Put `charset' property on text in CODING->object according to
7253 the annotation data at CHARBUF. CHARBUF is an array:
7254 [ -LENGTH ANNOTATION_MASK NCHARS CHARSET-ID ]
7258 produce_charset (struct coding_system
*coding
, int *charbuf
, ptrdiff_t pos
)
7260 ptrdiff_t from
= pos
- charbuf
[2];
7261 struct charset
*charset
= CHARSET_FROM_ID (charbuf
[3]);
7263 Fput_text_property (make_number (from
), make_number (pos
),
7264 Qcharset
, CHARSET_NAME (charset
),
7265 coding
->dst_object
);
7268 #define MAX_CHARBUF_SIZE 0x4000
7269 #define MIN_CHARBUF_SIZE 0x10
7271 #define ALLOC_CONVERSION_WORK_AREA(coding, size) \
7273 int units = ((size) > MAX_CHARBUF_SIZE ? MAX_CHARBUF_SIZE \
7274 : (size) < MIN_CHARBUF_SIZE ? MIN_CHARBUF_SIZE \
7276 coding->charbuf = SAFE_ALLOCA ((units) * sizeof (int)); \
7277 coding->charbuf_size = (units); \
7282 produce_annotation (struct coding_system
*coding
, ptrdiff_t pos
)
7284 int *charbuf
= coding
->charbuf
;
7285 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
7287 if (NILP (coding
->dst_object
))
7290 while (charbuf
< charbuf_end
)
7296 int len
= -*charbuf
;
7301 case CODING_ANNOTATE_COMPOSITION_MASK
:
7302 produce_composition (coding
, charbuf
, pos
);
7304 case CODING_ANNOTATE_CHARSET_MASK
:
7305 produce_charset (coding
, charbuf
, pos
);
7313 /* Decode the data at CODING->src_object into CODING->dst_object.
7314 CODING->src_object is a buffer, a string, or nil.
7315 CODING->dst_object is a buffer.
7317 If CODING->src_object is a buffer, it must be the current buffer.
7318 In this case, if CODING->src_pos is positive, it is a position of
7319 the source text in the buffer, otherwise, the source text is in the
7320 gap area of the buffer, and CODING->src_pos specifies the offset of
7321 the text from GPT (which must be the same as PT). If this is the
7322 same buffer as CODING->dst_object, CODING->src_pos must be
7325 If CODING->src_object is a string, CODING->src_pos is an index to
7328 If CODING->src_object is nil, CODING->source must already point to
7329 the non-relocatable memory area. In this case, CODING->src_pos is
7330 an offset from CODING->source.
7332 The decoded data is inserted at the current point of the buffer
7337 decode_coding (struct coding_system
*coding
)
7340 Lisp_Object undo_list
;
7341 Lisp_Object translation_table
;
7342 struct ccl_spec cclspec
;
7348 if (BUFFERP (coding
->src_object
)
7349 && coding
->src_pos
> 0
7350 && coding
->src_pos
< GPT
7351 && coding
->src_pos
+ coding
->src_chars
> GPT
)
7352 move_gap_both (coding
->src_pos
, coding
->src_pos_byte
);
7355 if (BUFFERP (coding
->dst_object
))
7357 set_buffer_internal (XBUFFER (coding
->dst_object
));
7359 move_gap_both (PT
, PT_BYTE
);
7361 /* We must disable undo_list in order to record the whole insert
7362 transaction via record_insert at the end. But doing so also
7363 disables the recording of the first change to the undo_list.
7364 Therefore we check for first change here and record it via
7365 record_first_change if needed. */
7366 if (MODIFF
<= SAVE_MODIFF
)
7367 record_first_change ();
7369 undo_list
= BVAR (current_buffer
, undo_list
);
7370 bset_undo_list (current_buffer
, Qt
);
7373 coding
->consumed
= coding
->consumed_char
= 0;
7374 coding
->produced
= coding
->produced_char
= 0;
7375 coding
->chars_at_source
= 0;
7376 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
7379 ALLOC_CONVERSION_WORK_AREA (coding
, coding
->src_bytes
);
7381 attrs
= CODING_ID_ATTRS (coding
->id
);
7382 translation_table
= get_translation_table (attrs
, 0, NULL
);
7385 if (coding
->decoder
== decode_coding_ccl
)
7387 coding
->spec
.ccl
= &cclspec
;
7388 setup_ccl_program (&cclspec
.ccl
, CODING_CCL_DECODER (coding
));
7392 ptrdiff_t pos
= coding
->dst_pos
+ coding
->produced_char
;
7394 coding_set_source (coding
);
7395 coding
->annotated
= 0;
7396 coding
->charbuf_used
= carryover
;
7397 (*(coding
->decoder
)) (coding
);
7398 coding_set_destination (coding
);
7399 carryover
= produce_chars (coding
, translation_table
, 0);
7400 if (coding
->annotated
)
7401 produce_annotation (coding
, pos
);
7402 for (i
= 0; i
< carryover
; i
++)
7404 = coding
->charbuf
[coding
->charbuf_used
- carryover
+ i
];
7406 while (coding
->result
== CODING_RESULT_INSUFFICIENT_DST
7407 || (coding
->consumed
< coding
->src_bytes
7408 && (coding
->result
== CODING_RESULT_SUCCESS
7409 || coding
->result
== CODING_RESULT_INVALID_SRC
)));
7413 coding_set_destination (coding
);
7414 coding
->charbuf_used
= carryover
;
7415 produce_chars (coding
, translation_table
, 1);
7418 coding
->carryover_bytes
= 0;
7419 if (coding
->consumed
< coding
->src_bytes
)
7421 ptrdiff_t nbytes
= coding
->src_bytes
- coding
->consumed
;
7422 const unsigned char *src
;
7424 coding_set_source (coding
);
7425 coding_set_destination (coding
);
7426 src
= coding
->source
+ coding
->consumed
;
7428 if (coding
->mode
& CODING_MODE_LAST_BLOCK
)
7430 /* Flush out unprocessed data as binary chars. We are sure
7431 that the number of data is less than the size of
7433 coding
->charbuf_used
= 0;
7434 coding
->chars_at_source
= 0;
7436 while (nbytes
-- > 0)
7441 c
= BYTE8_TO_CHAR (c
);
7442 coding
->charbuf
[coding
->charbuf_used
++] = c
;
7444 produce_chars (coding
, Qnil
, 1);
7448 /* Record unprocessed bytes in coding->carryover. We are
7449 sure that the number of data is less than the size of
7450 coding->carryover. */
7451 unsigned char *p
= coding
->carryover
;
7453 if (nbytes
> sizeof coding
->carryover
)
7454 nbytes
= sizeof coding
->carryover
;
7455 coding
->carryover_bytes
= nbytes
;
7456 while (nbytes
-- > 0)
7459 coding
->consumed
= coding
->src_bytes
;
7462 if (! EQ (CODING_ID_EOL_TYPE (coding
->id
), Qunix
)
7463 && !inhibit_eol_conversion
)
7464 decode_eol (coding
);
7465 if (BUFFERP (coding
->dst_object
))
7467 bset_undo_list (current_buffer
, undo_list
);
7468 record_insert (coding
->dst_pos
, coding
->produced_char
);
7475 /* Extract an annotation datum from a composition starting at POS and
7476 ending before LIMIT of CODING->src_object (buffer or string), store
7477 the data in BUF, set *STOP to a starting position of the next
7478 composition (if any) or to LIMIT, and return the address of the
7479 next element of BUF.
7481 If such an annotation is not found, set *STOP to a starting
7482 position of a composition after POS (if any) or to LIMIT, and
7486 handle_composition_annotation (ptrdiff_t pos
, ptrdiff_t limit
,
7487 struct coding_system
*coding
, int *buf
,
7490 ptrdiff_t start
, end
;
7493 if (! find_composition (pos
, limit
, &start
, &end
, &prop
, coding
->src_object
)
7496 else if (start
> pos
)
7502 /* We found a composition. Store the corresponding
7503 annotation data in BUF. */
7505 enum composition_method method
= composition_method (prop
);
7506 int nchars
= COMPOSITION_LENGTH (prop
);
7508 ADD_COMPOSITION_DATA (buf
, nchars
, 0, method
);
7509 if (method
!= COMPOSITION_RELATIVE
)
7511 Lisp_Object components
;
7512 ptrdiff_t i
, len
, i_byte
;
7514 components
= COMPOSITION_COMPONENTS (prop
);
7515 if (VECTORP (components
))
7517 len
= ASIZE (components
);
7518 for (i
= 0; i
< len
; i
++)
7519 *buf
++ = XINT (AREF (components
, i
));
7521 else if (STRINGP (components
))
7523 len
= SCHARS (components
);
7527 FETCH_STRING_CHAR_ADVANCE (*buf
, components
, i
, i_byte
);
7531 else if (INTEGERP (components
))
7534 *buf
++ = XINT (components
);
7536 else if (CONSP (components
))
7538 for (len
= 0; CONSP (components
);
7539 len
++, components
= XCDR (components
))
7540 *buf
++ = XINT (XCAR (components
));
7548 if (find_composition (end
, limit
, &start
, &end
, &prop
,
7559 /* Extract an annotation datum from a text property `charset' at POS of
7560 CODING->src_object (buffer of string), store the data in BUF, set
7561 *STOP to the position where the value of `charset' property changes
7562 (limiting by LIMIT), and return the address of the next element of
7565 If the property value is nil, set *STOP to the position where the
7566 property value is non-nil (limiting by LIMIT), and return BUF. */
7569 handle_charset_annotation (ptrdiff_t pos
, ptrdiff_t limit
,
7570 struct coding_system
*coding
, int *buf
,
7573 Lisp_Object val
, next
;
7576 val
= Fget_text_property (make_number (pos
), Qcharset
, coding
->src_object
);
7577 if (! NILP (val
) && CHARSETP (val
))
7578 id
= XINT (CHARSET_SYMBOL_ID (val
));
7581 ADD_CHARSET_DATA (buf
, 0, id
);
7582 next
= Fnext_single_property_change (make_number (pos
), Qcharset
,
7584 make_number (limit
));
7585 *stop
= XINT (next
);
7591 consume_chars (struct coding_system
*coding
, Lisp_Object translation_table
,
7594 int *buf
= coding
->charbuf
;
7595 int *buf_end
= coding
->charbuf
+ coding
->charbuf_size
;
7596 const unsigned char *src
= coding
->source
+ coding
->consumed
;
7597 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
7598 ptrdiff_t pos
= coding
->src_pos
+ coding
->consumed_char
;
7599 ptrdiff_t end_pos
= coding
->src_pos
+ coding
->src_chars
;
7600 bool multibytep
= coding
->src_multibyte
;
7601 Lisp_Object eol_type
;
7603 ptrdiff_t stop
, stop_composition
, stop_charset
;
7604 int *lookup_buf
= NULL
;
7606 if (! NILP (translation_table
))
7607 lookup_buf
= alloca (sizeof (int) * max_lookup
);
7609 eol_type
= inhibit_eol_conversion
? Qunix
: CODING_ID_EOL_TYPE (coding
->id
);
7610 if (VECTORP (eol_type
))
7613 /* Note: composition handling is not yet implemented. */
7614 coding
->common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
7616 if (NILP (coding
->src_object
))
7617 stop
= stop_composition
= stop_charset
= end_pos
;
7620 if (coding
->common_flags
& CODING_ANNOTATE_COMPOSITION_MASK
)
7621 stop
= stop_composition
= pos
;
7623 stop
= stop_composition
= end_pos
;
7624 if (coding
->common_flags
& CODING_ANNOTATE_CHARSET_MASK
)
7625 stop
= stop_charset
= pos
;
7627 stop_charset
= end_pos
;
7630 /* Compensate for CRLF and conversion. */
7631 buf_end
-= 1 + MAX_ANNOTATION_LENGTH
;
7632 while (buf
< buf_end
)
7640 if (pos
== stop_composition
)
7641 buf
= handle_composition_annotation (pos
, end_pos
, coding
,
7642 buf
, &stop_composition
);
7643 if (pos
== stop_charset
)
7644 buf
= handle_charset_annotation (pos
, end_pos
, coding
,
7645 buf
, &stop_charset
);
7646 stop
= (stop_composition
< stop_charset
7647 ? stop_composition
: stop_charset
);
7654 if (coding
->encoder
== encode_coding_raw_text
7655 || coding
->encoder
== encode_coding_ccl
)
7657 else if ((bytes
= MULTIBYTE_LENGTH (src
, src_end
)) > 0)
7658 c
= STRING_CHAR_ADVANCE_NO_UNIFY (src
), pos
+= bytes
;
7660 c
= BYTE8_TO_CHAR (*src
), src
++, pos
++;
7663 c
= STRING_CHAR_ADVANCE_NO_UNIFY (src
), pos
++;
7664 if ((c
== '\r') && (coding
->mode
& CODING_MODE_SELECTIVE_DISPLAY
))
7666 if (! EQ (eol_type
, Qunix
))
7670 if (EQ (eol_type
, Qdos
))
7678 LOOKUP_TRANSLATION_TABLE (translation_table
, c
, trans
);
7683 ptrdiff_t from_nchars
= 1, to_nchars
= 1;
7684 int *lookup_buf_end
;
7685 const unsigned char *p
= src
;
7689 for (i
= 1; i
< max_lookup
&& p
< src_end
; i
++)
7690 lookup_buf
[i
] = STRING_CHAR_ADVANCE (p
);
7691 lookup_buf_end
= lookup_buf
+ i
;
7692 trans
= get_translation (trans
, lookup_buf
, lookup_buf_end
);
7693 if (INTEGERP (trans
))
7695 else if (CONSP (trans
))
7697 from_nchars
= ASIZE (XCAR (trans
));
7698 trans
= XCDR (trans
);
7699 if (INTEGERP (trans
))
7703 to_nchars
= ASIZE (trans
);
7704 if (buf_end
- buf
< to_nchars
)
7706 c
= XINT (AREF (trans
, 0));
7712 for (i
= 1; i
< to_nchars
; i
++)
7713 *buf
++ = XINT (AREF (trans
, i
));
7714 for (i
= 1; i
< from_nchars
; i
++, pos
++)
7715 src
+= MULTIBYTE_LENGTH_NO_CHECK (src
);
7719 coding
->consumed
= src
- coding
->source
;
7720 coding
->consumed_char
= pos
- coding
->src_pos
;
7721 coding
->charbuf_used
= buf
- coding
->charbuf
;
7722 coding
->chars_at_source
= 0;
7726 /* Encode the text at CODING->src_object into CODING->dst_object.
7727 CODING->src_object is a buffer or a string.
7728 CODING->dst_object is a buffer or nil.
7730 If CODING->src_object is a buffer, it must be the current buffer.
7731 In this case, if CODING->src_pos is positive, it is a position of
7732 the source text in the buffer, otherwise. the source text is in the
7733 gap area of the buffer, and coding->src_pos specifies the offset of
7734 the text from GPT (which must be the same as PT). If this is the
7735 same buffer as CODING->dst_object, CODING->src_pos must be
7736 negative and CODING should not have `pre-write-conversion'.
7738 If CODING->src_object is a string, CODING should not have
7739 `pre-write-conversion'.
7741 If CODING->dst_object is a buffer, the encoded data is inserted at
7742 the current point of that buffer.
7744 If CODING->dst_object is nil, the encoded data is placed at the
7745 memory area specified by CODING->destination. */
7748 encode_coding (struct coding_system
*coding
)
7751 Lisp_Object translation_table
;
7753 struct ccl_spec cclspec
;
7757 attrs
= CODING_ID_ATTRS (coding
->id
);
7758 if (coding
->encoder
== encode_coding_raw_text
)
7759 translation_table
= Qnil
, max_lookup
= 0;
7761 translation_table
= get_translation_table (attrs
, 1, &max_lookup
);
7763 if (BUFFERP (coding
->dst_object
))
7765 set_buffer_internal (XBUFFER (coding
->dst_object
));
7766 coding
->dst_multibyte
7767 = ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
7770 coding
->consumed
= coding
->consumed_char
= 0;
7771 coding
->produced
= coding
->produced_char
= 0;
7772 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
7775 ALLOC_CONVERSION_WORK_AREA (coding
, coding
->src_chars
);
7777 if (coding
->encoder
== encode_coding_ccl
)
7779 coding
->spec
.ccl
= &cclspec
;
7780 setup_ccl_program (&cclspec
.ccl
, CODING_CCL_ENCODER (coding
));
7783 coding_set_source (coding
);
7784 consume_chars (coding
, translation_table
, max_lookup
);
7785 coding_set_destination (coding
);
7786 (*(coding
->encoder
)) (coding
);
7787 } while (coding
->consumed_char
< coding
->src_chars
);
7789 if (BUFFERP (coding
->dst_object
) && coding
->produced_char
> 0)
7790 insert_from_gap (coding
->produced_char
, coding
->produced
, 0);
7796 /* Name (or base name) of work buffer for code conversion. */
7797 static Lisp_Object Vcode_conversion_workbuf_name
;
7799 /* A working buffer used by the top level conversion. Once it is
7800 created, it is never destroyed. It has the name
7801 Vcode_conversion_workbuf_name. The other working buffers are
7802 destroyed after the use is finished, and their names are modified
7803 versions of Vcode_conversion_workbuf_name. */
7804 static Lisp_Object Vcode_conversion_reused_workbuf
;
7806 /* True iff Vcode_conversion_reused_workbuf is already in use. */
7807 static bool reused_workbuf_in_use
;
7810 /* Return a working buffer of code conversion. MULTIBYTE specifies the
7811 multibyteness of returning buffer. */
7814 make_conversion_work_buffer (bool multibyte
)
7816 Lisp_Object name
, workbuf
;
7817 struct buffer
*current
;
7819 if (reused_workbuf_in_use
)
7821 name
= Fgenerate_new_buffer_name (Vcode_conversion_workbuf_name
, Qnil
);
7822 workbuf
= Fget_buffer_create (name
);
7826 reused_workbuf_in_use
= 1;
7827 if (NILP (Fbuffer_live_p (Vcode_conversion_reused_workbuf
)))
7828 Vcode_conversion_reused_workbuf
7829 = Fget_buffer_create (Vcode_conversion_workbuf_name
);
7830 workbuf
= Vcode_conversion_reused_workbuf
;
7832 current
= current_buffer
;
7833 set_buffer_internal (XBUFFER (workbuf
));
7834 /* We can't allow modification hooks to run in the work buffer. For
7835 instance, directory_files_internal assumes that file decoding
7836 doesn't compile new regexps. */
7837 Fset (Fmake_local_variable (Qinhibit_modification_hooks
), Qt
);
7839 bset_undo_list (current_buffer
, Qt
);
7840 bset_enable_multibyte_characters (current_buffer
, multibyte
? Qt
: Qnil
);
7841 set_buffer_internal (current
);
7847 code_conversion_restore (Lisp_Object arg
)
7849 Lisp_Object current
, workbuf
;
7850 struct gcpro gcpro1
;
7853 current
= XCAR (arg
);
7854 workbuf
= XCDR (arg
);
7855 if (! NILP (workbuf
))
7857 if (EQ (workbuf
, Vcode_conversion_reused_workbuf
))
7858 reused_workbuf_in_use
= 0;
7860 Fkill_buffer (workbuf
);
7862 set_buffer_internal (XBUFFER (current
));
7867 code_conversion_save (bool with_work_buf
, bool multibyte
)
7869 Lisp_Object workbuf
= Qnil
;
7872 workbuf
= make_conversion_work_buffer (multibyte
);
7873 record_unwind_protect (code_conversion_restore
,
7874 Fcons (Fcurrent_buffer (), workbuf
));
7879 decode_coding_gap (struct coding_system
*coding
,
7880 ptrdiff_t chars
, ptrdiff_t bytes
)
7882 ptrdiff_t count
= SPECPDL_INDEX ();
7885 coding
->src_object
= Fcurrent_buffer ();
7886 coding
->src_chars
= chars
;
7887 coding
->src_bytes
= bytes
;
7888 coding
->src_pos
= -chars
;
7889 coding
->src_pos_byte
= -bytes
;
7890 coding
->src_multibyte
= chars
< bytes
;
7891 coding
->dst_object
= coding
->src_object
;
7892 coding
->dst_pos
= PT
;
7893 coding
->dst_pos_byte
= PT_BYTE
;
7894 coding
->dst_multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
7896 coding
->head_ascii
= -1;
7897 coding
->detected_utf8_bytes
= coding
->detected_utf8_chars
= -1;
7898 coding
->eol_seen
= EOL_SEEN_NONE
;
7899 if (CODING_REQUIRE_DETECTION (coding
))
7900 detect_coding (coding
);
7901 attrs
= CODING_ID_ATTRS (coding
->id
);
7902 if (! disable_ascii_optimization
7903 && ! coding
->src_multibyte
7904 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
))
7905 && NILP (CODING_ATTR_POST_READ (attrs
))
7906 && NILP (get_translation_table (attrs
, 0, NULL
)))
7908 chars
= coding
->head_ascii
;
7910 chars
= check_ascii (coding
);
7913 /* There exists a non-ASCII byte. */
7914 if (EQ (CODING_ATTR_TYPE (attrs
), Qutf_8
)
7915 && coding
->detected_utf8_bytes
== coding
->src_bytes
)
7917 if (coding
->detected_utf8_chars
>= 0)
7918 chars
= coding
->detected_utf8_chars
;
7920 chars
= check_utf_8 (coding
);
7921 if (CODING_UTF_8_BOM (coding
) != utf_without_bom
7922 && coding
->head_ascii
== 0
7923 && coding
->source
[0] == UTF_8_BOM_1
7924 && coding
->source
[1] == UTF_8_BOM_2
7925 && coding
->source
[2] == UTF_8_BOM_3
)
7929 coding
->src_bytes
-= 3;
7937 Lisp_Object eol_type
;
7939 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
7940 if (VECTORP (eol_type
))
7942 if (coding
->eol_seen
!= EOL_SEEN_NONE
)
7943 eol_type
= adjust_coding_eol_type (coding
, coding
->eol_seen
);
7945 if (EQ (eol_type
, Qmac
))
7947 unsigned char *src_end
= GAP_END_ADDR
;
7948 unsigned char *src
= src_end
- coding
->src_bytes
;
7950 while (src
< src_end
)
7956 else if (EQ (eol_type
, Qdos
))
7958 unsigned char *src
= GAP_END_ADDR
;
7959 unsigned char *src_beg
= src
- coding
->src_bytes
;
7960 unsigned char *dst
= src
;
7963 while (src_beg
< src
)
7966 if (*src
== '\n' && src
> src_beg
&& src
[-1] == '\r')
7973 coding
->produced
= bytes
;
7974 coding
->produced_char
= chars
;
7975 insert_from_gap (chars
, bytes
, 1);
7979 code_conversion_save (0, 0);
7981 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
7982 current_buffer
->text
->inhibit_shrinking
= 1;
7983 decode_coding (coding
);
7984 current_buffer
->text
->inhibit_shrinking
= 0;
7986 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
7988 ptrdiff_t prev_Z
= Z
, prev_Z_BYTE
= Z_BYTE
;
7991 TEMP_SET_PT_BOTH (coding
->dst_pos
, coding
->dst_pos_byte
);
7992 val
= call1 (CODING_ATTR_POST_READ (attrs
),
7993 make_number (coding
->produced_char
));
7995 coding
->produced_char
+= Z
- prev_Z
;
7996 coding
->produced
+= Z_BYTE
- prev_Z_BYTE
;
7999 unbind_to (count
, Qnil
);
8003 /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in
8004 SRC_OBJECT into DST_OBJECT by coding context CODING.
8006 SRC_OBJECT is a buffer, a string, or Qnil.
8008 If it is a buffer, the text is at point of the buffer. FROM and TO
8009 are positions in the buffer.
8011 If it is a string, the text is at the beginning of the string.
8012 FROM and TO are indices to the string.
8014 If it is nil, the text is at coding->source. FROM and TO are
8015 indices to coding->source.
8017 DST_OBJECT is a buffer, Qt, or Qnil.
8019 If it is a buffer, the decoded text is inserted at point of the
8020 buffer. If the buffer is the same as SRC_OBJECT, the source text
8023 If it is Qt, a string is made from the decoded text, and
8024 set in CODING->dst_object.
8026 If it is Qnil, the decoded text is stored at CODING->destination.
8027 The caller must allocate CODING->dst_bytes bytes at
8028 CODING->destination by xmalloc. If the decoded text is longer than
8029 CODING->dst_bytes, CODING->destination is relocated by xrealloc.
8033 decode_coding_object (struct coding_system
*coding
,
8034 Lisp_Object src_object
,
8035 ptrdiff_t from
, ptrdiff_t from_byte
,
8036 ptrdiff_t to
, ptrdiff_t to_byte
,
8037 Lisp_Object dst_object
)
8039 ptrdiff_t count
= SPECPDL_INDEX ();
8040 unsigned char *destination
IF_LINT (= NULL
);
8041 ptrdiff_t dst_bytes
IF_LINT (= 0);
8042 ptrdiff_t chars
= to
- from
;
8043 ptrdiff_t bytes
= to_byte
- from_byte
;
8045 ptrdiff_t saved_pt
= -1, saved_pt_byte
IF_LINT (= 0);
8046 bool need_marker_adjustment
= 0;
8047 Lisp_Object old_deactivate_mark
;
8049 old_deactivate_mark
= Vdeactivate_mark
;
8051 if (NILP (dst_object
))
8053 destination
= coding
->destination
;
8054 dst_bytes
= coding
->dst_bytes
;
8057 coding
->src_object
= src_object
;
8058 coding
->src_chars
= chars
;
8059 coding
->src_bytes
= bytes
;
8060 coding
->src_multibyte
= chars
< bytes
;
8062 if (STRINGP (src_object
))
8064 coding
->src_pos
= from
;
8065 coding
->src_pos_byte
= from_byte
;
8067 else if (BUFFERP (src_object
))
8069 set_buffer_internal (XBUFFER (src_object
));
8071 move_gap_both (from
, from_byte
);
8072 if (EQ (src_object
, dst_object
))
8074 struct Lisp_Marker
*tail
;
8076 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
8078 tail
->need_adjustment
8079 = tail
->charpos
== (tail
->insertion_type
? from
: to
);
8080 need_marker_adjustment
|= tail
->need_adjustment
;
8082 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
8083 TEMP_SET_PT_BOTH (from
, from_byte
);
8084 current_buffer
->text
->inhibit_shrinking
= 1;
8085 del_range_both (from
, from_byte
, to
, to_byte
, 1);
8086 coding
->src_pos
= -chars
;
8087 coding
->src_pos_byte
= -bytes
;
8091 coding
->src_pos
= from
;
8092 coding
->src_pos_byte
= from_byte
;
8096 if (CODING_REQUIRE_DETECTION (coding
))
8097 detect_coding (coding
);
8098 attrs
= CODING_ID_ATTRS (coding
->id
);
8100 if (EQ (dst_object
, Qt
)
8101 || (! NILP (CODING_ATTR_POST_READ (attrs
))
8102 && NILP (dst_object
)))
8104 coding
->dst_multibyte
= !CODING_FOR_UNIBYTE (coding
);
8105 coding
->dst_object
= code_conversion_save (1, coding
->dst_multibyte
);
8106 coding
->dst_pos
= BEG
;
8107 coding
->dst_pos_byte
= BEG_BYTE
;
8109 else if (BUFFERP (dst_object
))
8111 code_conversion_save (0, 0);
8112 coding
->dst_object
= dst_object
;
8113 coding
->dst_pos
= BUF_PT (XBUFFER (dst_object
));
8114 coding
->dst_pos_byte
= BUF_PT_BYTE (XBUFFER (dst_object
));
8115 coding
->dst_multibyte
8116 = ! NILP (BVAR (XBUFFER (dst_object
), enable_multibyte_characters
));
8120 code_conversion_save (0, 0);
8121 coding
->dst_object
= Qnil
;
8122 /* Most callers presume this will return a multibyte result, and they
8123 won't use `binary' or `raw-text' anyway, so let's not worry about
8124 CODING_FOR_UNIBYTE. */
8125 coding
->dst_multibyte
= 1;
8128 decode_coding (coding
);
8130 if (BUFFERP (coding
->dst_object
))
8131 set_buffer_internal (XBUFFER (coding
->dst_object
));
8133 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
8135 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
8136 ptrdiff_t prev_Z
= Z
, prev_Z_BYTE
= Z_BYTE
;
8139 TEMP_SET_PT_BOTH (coding
->dst_pos
, coding
->dst_pos_byte
);
8140 GCPRO5 (coding
->src_object
, coding
->dst_object
, src_object
, dst_object
,
8141 old_deactivate_mark
);
8142 val
= safe_call1 (CODING_ATTR_POST_READ (attrs
),
8143 make_number (coding
->produced_char
));
8146 coding
->produced_char
+= Z
- prev_Z
;
8147 coding
->produced
+= Z_BYTE
- prev_Z_BYTE
;
8150 if (EQ (dst_object
, Qt
))
8152 coding
->dst_object
= Fbuffer_string ();
8154 else if (NILP (dst_object
) && BUFFERP (coding
->dst_object
))
8156 set_buffer_internal (XBUFFER (coding
->dst_object
));
8157 if (dst_bytes
< coding
->produced
)
8159 eassert (coding
->produced
> 0);
8160 destination
= xrealloc (destination
, coding
->produced
);
8161 if (BEGV
< GPT
&& GPT
< BEGV
+ coding
->produced_char
)
8162 move_gap_both (BEGV
, BEGV_BYTE
);
8163 memcpy (destination
, BEGV_ADDR
, coding
->produced
);
8164 coding
->destination
= destination
;
8170 /* This is the case of:
8171 (BUFFERP (src_object) && EQ (src_object, dst_object))
8172 As we have moved PT while replacing the original buffer
8173 contents, we must recover it now. */
8174 set_buffer_internal (XBUFFER (src_object
));
8175 current_buffer
->text
->inhibit_shrinking
= 0;
8176 if (saved_pt
< from
)
8177 TEMP_SET_PT_BOTH (saved_pt
, saved_pt_byte
);
8178 else if (saved_pt
< from
+ chars
)
8179 TEMP_SET_PT_BOTH (from
, from_byte
);
8180 else if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
8181 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced_char
- chars
),
8182 saved_pt_byte
+ (coding
->produced
- bytes
));
8184 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced
- bytes
),
8185 saved_pt_byte
+ (coding
->produced
- bytes
));
8187 if (need_marker_adjustment
)
8189 struct Lisp_Marker
*tail
;
8191 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
8192 if (tail
->need_adjustment
)
8194 tail
->need_adjustment
= 0;
8195 if (tail
->insertion_type
)
8197 tail
->bytepos
= from_byte
;
8198 tail
->charpos
= from
;
8202 tail
->bytepos
= from_byte
+ coding
->produced
;
8204 = (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
8205 ? tail
->bytepos
: from
+ coding
->produced_char
);
8211 Vdeactivate_mark
= old_deactivate_mark
;
8212 unbind_to (count
, coding
->dst_object
);
8217 encode_coding_object (struct coding_system
*coding
,
8218 Lisp_Object src_object
,
8219 ptrdiff_t from
, ptrdiff_t from_byte
,
8220 ptrdiff_t to
, ptrdiff_t to_byte
,
8221 Lisp_Object dst_object
)
8223 ptrdiff_t count
= SPECPDL_INDEX ();
8224 ptrdiff_t chars
= to
- from
;
8225 ptrdiff_t bytes
= to_byte
- from_byte
;
8227 ptrdiff_t saved_pt
= -1, saved_pt_byte
IF_LINT (= 0);
8228 bool need_marker_adjustment
= 0;
8229 bool kill_src_buffer
= 0;
8230 Lisp_Object old_deactivate_mark
;
8232 old_deactivate_mark
= Vdeactivate_mark
;
8234 coding
->src_object
= src_object
;
8235 coding
->src_chars
= chars
;
8236 coding
->src_bytes
= bytes
;
8237 coding
->src_multibyte
= chars
< bytes
;
8239 attrs
= CODING_ID_ATTRS (coding
->id
);
8241 if (EQ (src_object
, dst_object
))
8243 struct Lisp_Marker
*tail
;
8245 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
8247 tail
->need_adjustment
8248 = tail
->charpos
== (tail
->insertion_type
? from
: to
);
8249 need_marker_adjustment
|= tail
->need_adjustment
;
8253 if (! NILP (CODING_ATTR_PRE_WRITE (attrs
)))
8255 coding
->src_object
= code_conversion_save (1, coding
->src_multibyte
);
8256 set_buffer_internal (XBUFFER (coding
->src_object
));
8257 if (STRINGP (src_object
))
8258 insert_from_string (src_object
, from
, from_byte
, chars
, bytes
, 0);
8259 else if (BUFFERP (src_object
))
8260 insert_from_buffer (XBUFFER (src_object
), from
, chars
, 0);
8262 insert_1_both ((char *) coding
->source
+ from
, chars
, bytes
, 0, 0, 0);
8264 if (EQ (src_object
, dst_object
))
8266 set_buffer_internal (XBUFFER (src_object
));
8267 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
8268 del_range_both (from
, from_byte
, to
, to_byte
, 1);
8269 set_buffer_internal (XBUFFER (coding
->src_object
));
8273 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
8275 GCPRO5 (coding
->src_object
, coding
->dst_object
, src_object
, dst_object
,
8276 old_deactivate_mark
);
8277 safe_call2 (CODING_ATTR_PRE_WRITE (attrs
),
8278 make_number (BEG
), make_number (Z
));
8281 if (XBUFFER (coding
->src_object
) != current_buffer
)
8282 kill_src_buffer
= 1;
8283 coding
->src_object
= Fcurrent_buffer ();
8285 move_gap_both (BEG
, BEG_BYTE
);
8286 coding
->src_chars
= Z
- BEG
;
8287 coding
->src_bytes
= Z_BYTE
- BEG_BYTE
;
8288 coding
->src_pos
= BEG
;
8289 coding
->src_pos_byte
= BEG_BYTE
;
8290 coding
->src_multibyte
= Z
< Z_BYTE
;
8292 else if (STRINGP (src_object
))
8294 code_conversion_save (0, 0);
8295 coding
->src_pos
= from
;
8296 coding
->src_pos_byte
= from_byte
;
8298 else if (BUFFERP (src_object
))
8300 code_conversion_save (0, 0);
8301 set_buffer_internal (XBUFFER (src_object
));
8302 if (EQ (src_object
, dst_object
))
8304 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
8305 coding
->src_object
= del_range_1 (from
, to
, 1, 1);
8306 coding
->src_pos
= 0;
8307 coding
->src_pos_byte
= 0;
8311 if (from
< GPT
&& to
>= GPT
)
8312 move_gap_both (from
, from_byte
);
8313 coding
->src_pos
= from
;
8314 coding
->src_pos_byte
= from_byte
;
8318 code_conversion_save (0, 0);
8320 if (BUFFERP (dst_object
))
8322 coding
->dst_object
= dst_object
;
8323 if (EQ (src_object
, dst_object
))
8325 coding
->dst_pos
= from
;
8326 coding
->dst_pos_byte
= from_byte
;
8330 struct buffer
*current
= current_buffer
;
8332 set_buffer_temp (XBUFFER (dst_object
));
8333 coding
->dst_pos
= PT
;
8334 coding
->dst_pos_byte
= PT_BYTE
;
8335 move_gap_both (coding
->dst_pos
, coding
->dst_pos_byte
);
8336 set_buffer_temp (current
);
8338 coding
->dst_multibyte
8339 = ! NILP (BVAR (XBUFFER (dst_object
), enable_multibyte_characters
));
8341 else if (EQ (dst_object
, Qt
))
8343 ptrdiff_t dst_bytes
= max (1, coding
->src_chars
);
8344 coding
->dst_object
= Qnil
;
8345 coding
->destination
= xmalloc_atomic (dst_bytes
);
8346 coding
->dst_bytes
= dst_bytes
;
8347 coding
->dst_multibyte
= 0;
8351 coding
->dst_object
= Qnil
;
8352 coding
->dst_multibyte
= 0;
8355 encode_coding (coding
);
8357 if (EQ (dst_object
, Qt
))
8359 if (BUFFERP (coding
->dst_object
))
8360 coding
->dst_object
= Fbuffer_string ();
8361 else if (coding
->raw_destination
)
8362 /* This is used to avoid creating huge Lisp string.
8363 NOTE: caller who sets `raw_destination' is also
8364 responsible for freeing `destination' buffer. */
8365 coding
->dst_object
= Qnil
;
8369 = make_unibyte_string ((char *) coding
->destination
,
8371 xfree (coding
->destination
);
8377 /* This is the case of:
8378 (BUFFERP (src_object) && EQ (src_object, dst_object))
8379 As we have moved PT while replacing the original buffer
8380 contents, we must recover it now. */
8381 set_buffer_internal (XBUFFER (src_object
));
8382 if (saved_pt
< from
)
8383 TEMP_SET_PT_BOTH (saved_pt
, saved_pt_byte
);
8384 else if (saved_pt
< from
+ chars
)
8385 TEMP_SET_PT_BOTH (from
, from_byte
);
8386 else if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
8387 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced_char
- chars
),
8388 saved_pt_byte
+ (coding
->produced
- bytes
));
8390 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced
- bytes
),
8391 saved_pt_byte
+ (coding
->produced
- bytes
));
8393 if (need_marker_adjustment
)
8395 struct Lisp_Marker
*tail
;
8397 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
8398 if (tail
->need_adjustment
)
8400 tail
->need_adjustment
= 0;
8401 if (tail
->insertion_type
)
8403 tail
->bytepos
= from_byte
;
8404 tail
->charpos
= from
;
8408 tail
->bytepos
= from_byte
+ coding
->produced
;
8410 = (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
8411 ? tail
->bytepos
: from
+ coding
->produced_char
);
8417 if (kill_src_buffer
)
8418 Fkill_buffer (coding
->src_object
);
8420 Vdeactivate_mark
= old_deactivate_mark
;
8421 unbind_to (count
, Qnil
);
8426 preferred_coding_system (void)
8428 int id
= coding_categories
[coding_priorities
[0]].id
;
8430 return CODING_ID_NAME (id
);
8433 #if defined (WINDOWSNT) || defined (CYGWIN)
8436 from_unicode (Lisp_Object str
)
8439 if (!STRING_MULTIBYTE (str
) &&
8442 str
= Fsubstring (str
, make_number (0), make_number (-1));
8445 return code_convert_string_norecord (str
, Qutf_16le
, 0);
8449 from_unicode_buffer (const wchar_t *wstr
)
8451 return from_unicode (
8452 make_unibyte_string (
8454 /* we get one of the two final 0 bytes for free. */
8455 1 + sizeof (wchar_t) * wcslen (wstr
)));
8459 to_unicode (Lisp_Object str
, Lisp_Object
*buf
)
8461 *buf
= code_convert_string_norecord (str
, Qutf_16le
, 1);
8462 /* We need to make another copy (in addition to the one made by
8463 code_convert_string_norecord) to ensure that the final string is
8464 _doubly_ zero terminated --- that is, that the string is
8465 terminated by two zero bytes and one utf-16le null character.
8466 Because strings are already terminated with a single zero byte,
8467 we just add one additional zero. */
8468 str
= make_uninit_string (SBYTES (*buf
) + 1);
8469 memcpy (SDATA (str
), SDATA (*buf
), SBYTES (*buf
));
8470 SDATA (str
) [SBYTES (*buf
)] = '\0';
8472 return WCSDATA (*buf
);
8475 #endif /* WINDOWSNT || CYGWIN */
8479 /*** 8. Emacs Lisp library functions ***/
8481 DEFUN ("coding-system-p", Fcoding_system_p
, Scoding_system_p
, 1, 1, 0,
8482 doc
: /* Return t if OBJECT is nil or a coding-system.
8483 See the documentation of `define-coding-system' for information
8484 about coding-system objects. */)
8485 (Lisp_Object object
)
8488 || CODING_SYSTEM_ID (object
) >= 0)
8490 if (! SYMBOLP (object
)
8491 || NILP (Fget (object
, Qcoding_system_define_form
)))
8496 DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system
,
8497 Sread_non_nil_coding_system
, 1, 1, 0,
8498 doc
: /* Read a coding system from the minibuffer, prompting with string PROMPT. */)
8499 (Lisp_Object prompt
)
8504 val
= Fcompleting_read (prompt
, Vcoding_system_alist
, Qnil
,
8505 Qt
, Qnil
, Qcoding_system_history
, Qnil
, Qnil
);
8507 while (SCHARS (val
) == 0);
8508 return (Fintern (val
, Qnil
));
8511 DEFUN ("read-coding-system", Fread_coding_system
, Sread_coding_system
, 1, 2, 0,
8512 doc
: /* Read a coding system from the minibuffer, prompting with string PROMPT.
8513 If the user enters null input, return second argument DEFAULT-CODING-SYSTEM.
8514 Ignores case when completing coding systems (all Emacs coding systems
8515 are lower-case). */)
8516 (Lisp_Object prompt
, Lisp_Object default_coding_system
)
8519 ptrdiff_t count
= SPECPDL_INDEX ();
8521 if (SYMBOLP (default_coding_system
))
8522 default_coding_system
= SYMBOL_NAME (default_coding_system
);
8523 specbind (Qcompletion_ignore_case
, Qt
);
8524 val
= Fcompleting_read (prompt
, Vcoding_system_alist
, Qnil
,
8525 Qt
, Qnil
, Qcoding_system_history
,
8526 default_coding_system
, Qnil
);
8527 unbind_to (count
, Qnil
);
8528 return (SCHARS (val
) == 0 ? Qnil
: Fintern (val
, Qnil
));
8531 DEFUN ("check-coding-system", Fcheck_coding_system
, Scheck_coding_system
,
8533 doc
: /* Check validity of CODING-SYSTEM.
8534 If valid, return CODING-SYSTEM, else signal a `coding-system-error' error.
8535 It is valid if it is nil or a symbol defined as a coding system by the
8536 function `define-coding-system'. */)
8537 (Lisp_Object coding_system
)
8539 Lisp_Object define_form
;
8541 define_form
= Fget (coding_system
, Qcoding_system_define_form
);
8542 if (! NILP (define_form
))
8544 Fput (coding_system
, Qcoding_system_define_form
, Qnil
);
8545 safe_eval (define_form
);
8547 if (!NILP (Fcoding_system_p (coding_system
)))
8548 return coding_system
;
8549 xsignal1 (Qcoding_system_error
, coding_system
);
8553 /* Detect how the bytes at SRC of length SRC_BYTES are encoded. If
8554 HIGHEST, return the coding system of the highest
8555 priority among the detected coding systems. Otherwise return a
8556 list of detected coding systems sorted by their priorities. If
8557 MULTIBYTEP, it is assumed that the bytes are in correct
8558 multibyte form but contains only ASCII and eight-bit chars.
8559 Otherwise, the bytes are raw bytes.
8561 CODING-SYSTEM controls the detection as below:
8563 If it is nil, detect both text-format and eol-format. If the
8564 text-format part of CODING-SYSTEM is already specified
8565 (e.g. `iso-latin-1'), detect only eol-format. If the eol-format
8566 part of CODING-SYSTEM is already specified (e.g. `undecided-unix'),
8567 detect only text-format. */
8570 detect_coding_system (const unsigned char *src
,
8571 ptrdiff_t src_chars
, ptrdiff_t src_bytes
,
8572 bool highest
, bool multibytep
,
8573 Lisp_Object coding_system
)
8575 const unsigned char *src_end
= src
+ src_bytes
;
8576 Lisp_Object attrs
, eol_type
;
8577 Lisp_Object val
= Qnil
;
8578 struct coding_system coding
;
8580 struct coding_detection_info detect_info
;
8581 enum coding_category base_category
;
8582 bool null_byte_found
= 0, eight_bit_found
= 0;
8584 if (NILP (coding_system
))
8585 coding_system
= Qundecided
;
8586 setup_coding_system (coding_system
, &coding
);
8587 attrs
= CODING_ID_ATTRS (coding
.id
);
8588 eol_type
= CODING_ID_EOL_TYPE (coding
.id
);
8589 coding_system
= CODING_ATTR_BASE_NAME (attrs
);
8591 coding
.source
= src
;
8592 coding
.src_chars
= src_chars
;
8593 coding
.src_bytes
= src_bytes
;
8594 coding
.src_multibyte
= multibytep
;
8595 coding
.consumed
= 0;
8596 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
8597 coding
.head_ascii
= 0;
8599 detect_info
.checked
= detect_info
.found
= detect_info
.rejected
= 0;
8601 /* At first, detect text-format if necessary. */
8602 base_category
= XINT (CODING_ATTR_CATEGORY (attrs
));
8603 if (base_category
== coding_category_undecided
)
8605 enum coding_category category
IF_LINT (= 0);
8606 struct coding_system
*this IF_LINT (= NULL
);
8608 bool inhibit_nbd
= inhibit_flag (coding
.spec
.undecided
.inhibit_nbd
,
8609 inhibit_null_byte_detection
);
8610 bool inhibit_ied
= inhibit_flag (coding
.spec
.undecided
.inhibit_ied
,
8611 inhibit_iso_escape_detection
);
8612 bool prefer_utf_8
= coding
.spec
.undecided
.prefer_utf_8
;
8614 /* Skip all ASCII bytes except for a few ISO2022 controls. */
8615 for (; src
< src_end
; src
++)
8620 eight_bit_found
= 1;
8621 if (null_byte_found
)
8626 if ((c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
)
8628 && ! detect_info
.checked
)
8630 if (detect_coding_iso_2022 (&coding
, &detect_info
))
8632 /* We have scanned the whole data. */
8633 if (! (detect_info
.rejected
& CATEGORY_MASK_ISO_7_ELSE
))
8635 /* We didn't find an 8-bit code. We may
8636 have found a null-byte, but it's very
8637 rare that a binary file confirm to
8640 coding
.head_ascii
= src
- coding
.source
;
8642 detect_info
.rejected
|= ~CATEGORY_MASK_ISO_ESCAPE
;
8646 else if (! c
&& !inhibit_nbd
)
8648 null_byte_found
= 1;
8649 if (eight_bit_found
)
8652 if (! eight_bit_found
)
8653 coding
.head_ascii
++;
8655 else if (! eight_bit_found
)
8656 coding
.head_ascii
++;
8659 if (null_byte_found
|| eight_bit_found
8660 || coding
.head_ascii
< coding
.src_bytes
8661 || detect_info
.found
)
8663 if (coding
.head_ascii
== coding
.src_bytes
)
8664 /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */
8665 for (i
= 0; i
< coding_category_raw_text
; i
++)
8667 category
= coding_priorities
[i
];
8668 this = coding_categories
+ category
;
8669 if (detect_info
.found
& (1 << category
))
8674 if (null_byte_found
)
8676 detect_info
.checked
|= ~CATEGORY_MASK_UTF_16
;
8677 detect_info
.rejected
|= ~CATEGORY_MASK_UTF_16
;
8679 else if (prefer_utf_8
8680 && detect_coding_utf_8 (&coding
, &detect_info
))
8682 detect_info
.checked
|= ~CATEGORY_MASK_UTF_8
;
8683 detect_info
.rejected
|= ~CATEGORY_MASK_UTF_8
;
8685 for (i
= 0; i
< coding_category_raw_text
; i
++)
8687 category
= coding_priorities
[i
];
8688 this = coding_categories
+ category
;
8692 /* No coding system of this category is defined. */
8693 detect_info
.rejected
|= (1 << category
);
8695 else if (category
>= coding_category_raw_text
)
8697 else if (detect_info
.checked
& (1 << category
))
8700 && (detect_info
.found
& (1 << category
)))
8703 else if ((*(this->detector
)) (&coding
, &detect_info
)
8705 && (detect_info
.found
& (1 << category
)))
8707 if (category
== coding_category_utf_16_auto
)
8709 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
8710 category
= coding_category_utf_16_le
;
8712 category
= coding_category_utf_16_be
;
8720 if ((detect_info
.rejected
& CATEGORY_MASK_ANY
) == CATEGORY_MASK_ANY
8723 detect_info
.found
= CATEGORY_MASK_RAW_TEXT
;
8724 id
= CODING_SYSTEM_ID (Qno_conversion
);
8725 val
= list1 (make_number (id
));
8727 else if (! detect_info
.rejected
&& ! detect_info
.found
)
8729 detect_info
.found
= CATEGORY_MASK_ANY
;
8730 id
= coding_categories
[coding_category_undecided
].id
;
8731 val
= list1 (make_number (id
));
8735 if (detect_info
.found
)
8737 detect_info
.found
= 1 << category
;
8738 val
= list1 (make_number (this->id
));
8741 for (i
= 0; i
< coding_category_raw_text
; i
++)
8742 if (! (detect_info
.rejected
& (1 << coding_priorities
[i
])))
8744 detect_info
.found
= 1 << coding_priorities
[i
];
8745 id
= coding_categories
[coding_priorities
[i
]].id
;
8746 val
= list1 (make_number (id
));
8752 int mask
= detect_info
.rejected
| detect_info
.found
;
8755 for (i
= coding_category_raw_text
- 1; i
>= 0; i
--)
8757 category
= coding_priorities
[i
];
8758 if (! (mask
& (1 << category
)))
8760 found
|= 1 << category
;
8761 id
= coding_categories
[category
].id
;
8763 val
= list1 (make_number (id
));
8766 for (i
= coding_category_raw_text
- 1; i
>= 0; i
--)
8768 category
= coding_priorities
[i
];
8769 if (detect_info
.found
& (1 << category
))
8771 id
= coding_categories
[category
].id
;
8772 val
= Fcons (make_number (id
), val
);
8775 detect_info
.found
|= found
;
8778 else if (base_category
== coding_category_utf_8_auto
)
8780 if (detect_coding_utf_8 (&coding
, &detect_info
))
8782 struct coding_system
*this;
8784 if (detect_info
.found
& CATEGORY_MASK_UTF_8_SIG
)
8785 this = coding_categories
+ coding_category_utf_8_sig
;
8787 this = coding_categories
+ coding_category_utf_8_nosig
;
8788 val
= list1 (make_number (this->id
));
8791 else if (base_category
== coding_category_utf_16_auto
)
8793 if (detect_coding_utf_16 (&coding
, &detect_info
))
8795 struct coding_system
*this;
8797 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
8798 this = coding_categories
+ coding_category_utf_16_le
;
8799 else if (detect_info
.found
& CATEGORY_MASK_UTF_16_BE
)
8800 this = coding_categories
+ coding_category_utf_16_be
;
8801 else if (detect_info
.rejected
& CATEGORY_MASK_UTF_16_LE_NOSIG
)
8802 this = coding_categories
+ coding_category_utf_16_be_nosig
;
8804 this = coding_categories
+ coding_category_utf_16_le_nosig
;
8805 val
= list1 (make_number (this->id
));
8810 detect_info
.found
= 1 << XINT (CODING_ATTR_CATEGORY (attrs
));
8811 val
= list1 (make_number (coding
.id
));
8814 /* Then, detect eol-format if necessary. */
8816 int normal_eol
= -1, utf_16_be_eol
= -1, utf_16_le_eol
= -1;
8819 if (VECTORP (eol_type
))
8821 if (detect_info
.found
& ~CATEGORY_MASK_UTF_16
)
8823 if (null_byte_found
)
8824 normal_eol
= EOL_SEEN_LF
;
8826 normal_eol
= detect_eol (coding
.source
, src_bytes
,
8827 coding_category_raw_text
);
8829 if (detect_info
.found
& (CATEGORY_MASK_UTF_16_BE
8830 | CATEGORY_MASK_UTF_16_BE_NOSIG
))
8831 utf_16_be_eol
= detect_eol (coding
.source
, src_bytes
,
8832 coding_category_utf_16_be
);
8833 if (detect_info
.found
& (CATEGORY_MASK_UTF_16_LE
8834 | CATEGORY_MASK_UTF_16_LE_NOSIG
))
8835 utf_16_le_eol
= detect_eol (coding
.source
, src_bytes
,
8836 coding_category_utf_16_le
);
8840 if (EQ (eol_type
, Qunix
))
8841 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_LF
;
8842 else if (EQ (eol_type
, Qdos
))
8843 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_CRLF
;
8845 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_CR
;
8848 for (tail
= val
; CONSP (tail
); tail
= XCDR (tail
))
8850 enum coding_category category
;
8853 id
= XINT (XCAR (tail
));
8854 attrs
= CODING_ID_ATTRS (id
);
8855 category
= XINT (CODING_ATTR_CATEGORY (attrs
));
8856 eol_type
= CODING_ID_EOL_TYPE (id
);
8857 if (VECTORP (eol_type
))
8859 if (category
== coding_category_utf_16_be
8860 || category
== coding_category_utf_16_be_nosig
)
8861 this_eol
= utf_16_be_eol
;
8862 else if (category
== coding_category_utf_16_le
8863 || category
== coding_category_utf_16_le_nosig
)
8864 this_eol
= utf_16_le_eol
;
8866 this_eol
= normal_eol
;
8868 if (this_eol
== EOL_SEEN_LF
)
8869 XSETCAR (tail
, AREF (eol_type
, 0));
8870 else if (this_eol
== EOL_SEEN_CRLF
)
8871 XSETCAR (tail
, AREF (eol_type
, 1));
8872 else if (this_eol
== EOL_SEEN_CR
)
8873 XSETCAR (tail
, AREF (eol_type
, 2));
8875 XSETCAR (tail
, CODING_ID_NAME (id
));
8878 XSETCAR (tail
, CODING_ID_NAME (id
));
8882 return (highest
? (CONSP (val
) ? XCAR (val
) : Qnil
) : val
);
8886 DEFUN ("detect-coding-region", Fdetect_coding_region
, Sdetect_coding_region
,
8888 doc
: /* Detect coding system of the text in the region between START and END.
8889 Return a list of possible coding systems ordered by priority.
8890 The coding systems to try and their priorities follows what
8891 the function `coding-system-priority-list' (which see) returns.
8893 If only ASCII characters are found (except for such ISO-2022 control
8894 characters as ESC), it returns a list of single element `undecided'
8895 or its subsidiary coding system according to a detected end-of-line
8898 If optional argument HIGHEST is non-nil, return the coding system of
8899 highest priority. */)
8900 (Lisp_Object start
, Lisp_Object end
, Lisp_Object highest
)
8903 ptrdiff_t from_byte
, to_byte
;
8905 validate_region (&start
, &end
);
8906 from
= XINT (start
), to
= XINT (end
);
8907 from_byte
= CHAR_TO_BYTE (from
);
8908 to_byte
= CHAR_TO_BYTE (to
);
8910 if (from
< GPT
&& to
>= GPT
)
8911 move_gap_both (to
, to_byte
);
8913 return detect_coding_system (BYTE_POS_ADDR (from_byte
),
8914 to
- from
, to_byte
- from_byte
,
8916 !NILP (BVAR (current_buffer
8917 , enable_multibyte_characters
)),
8921 DEFUN ("detect-coding-string", Fdetect_coding_string
, Sdetect_coding_string
,
8923 doc
: /* Detect coding system of the text in STRING.
8924 Return a list of possible coding systems ordered by priority.
8925 The coding systems to try and their priorities follows what
8926 the function `coding-system-priority-list' (which see) returns.
8928 If only ASCII characters are found (except for such ISO-2022 control
8929 characters as ESC), it returns a list of single element `undecided'
8930 or its subsidiary coding system according to a detected end-of-line
8933 If optional argument HIGHEST is non-nil, return the coding system of
8934 highest priority. */)
8935 (Lisp_Object string
, Lisp_Object highest
)
8937 CHECK_STRING (string
);
8939 return detect_coding_system (SDATA (string
),
8940 SCHARS (string
), SBYTES (string
),
8941 !NILP (highest
), STRING_MULTIBYTE (string
),
8947 char_encodable_p (int c
, Lisp_Object attrs
)
8950 struct charset
*charset
;
8951 Lisp_Object translation_table
;
8953 translation_table
= CODING_ATTR_TRANS_TBL (attrs
);
8954 if (! NILP (translation_table
))
8955 c
= translate_char (translation_table
, c
);
8956 for (tail
= CODING_ATTR_CHARSET_LIST (attrs
);
8957 CONSP (tail
); tail
= XCDR (tail
))
8959 charset
= CHARSET_FROM_ID (XINT (XCAR (tail
)));
8960 if (CHAR_CHARSET_P (c
, charset
))
8963 return (! NILP (tail
));
8967 /* Return a list of coding systems that safely encode the text between
8968 START and END. If EXCLUDE is non-nil, it is a list of coding
8969 systems not to check. The returned list doesn't contain any such
8970 coding systems. In any case, if the text contains only ASCII or is
8971 unibyte, return t. */
8973 DEFUN ("find-coding-systems-region-internal",
8974 Ffind_coding_systems_region_internal
,
8975 Sfind_coding_systems_region_internal
, 2, 3, 0,
8976 doc
: /* Internal use only. */)
8977 (Lisp_Object start
, Lisp_Object end
, Lisp_Object exclude
)
8979 Lisp_Object coding_attrs_list
, safe_codings
;
8980 ptrdiff_t start_byte
, end_byte
;
8981 const unsigned char *p
, *pbeg
, *pend
;
8983 Lisp_Object tail
, elt
, work_table
;
8985 if (STRINGP (start
))
8987 if (!STRING_MULTIBYTE (start
)
8988 || SCHARS (start
) == SBYTES (start
))
8991 end_byte
= SBYTES (start
);
8995 CHECK_NUMBER_COERCE_MARKER (start
);
8996 CHECK_NUMBER_COERCE_MARKER (end
);
8997 if (XINT (start
) < BEG
|| XINT (end
) > Z
|| XINT (start
) > XINT (end
))
8998 args_out_of_range (start
, end
);
8999 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
9001 start_byte
= CHAR_TO_BYTE (XINT (start
));
9002 end_byte
= CHAR_TO_BYTE (XINT (end
));
9003 if (XINT (end
) - XINT (start
) == end_byte
- start_byte
)
9006 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
9008 if ((GPT
- XINT (start
)) < (XINT (end
) - GPT
))
9009 move_gap_both (XINT (start
), start_byte
);
9011 move_gap_both (XINT (end
), end_byte
);
9015 coding_attrs_list
= Qnil
;
9016 for (tail
= Vcoding_system_list
; CONSP (tail
); tail
= XCDR (tail
))
9018 || NILP (Fmemq (XCAR (tail
), exclude
)))
9022 attrs
= AREF (CODING_SYSTEM_SPEC (XCAR (tail
)), 0);
9023 if (EQ (XCAR (tail
), CODING_ATTR_BASE_NAME (attrs
)))
9025 ASET (attrs
, coding_attr_trans_tbl
,
9026 get_translation_table (attrs
, 1, NULL
));
9027 coding_attrs_list
= Fcons (attrs
, coding_attrs_list
);
9031 if (STRINGP (start
))
9032 p
= pbeg
= SDATA (start
);
9034 p
= pbeg
= BYTE_POS_ADDR (start_byte
);
9035 pend
= p
+ (end_byte
- start_byte
);
9037 while (p
< pend
&& ASCII_CHAR_P (*p
)) p
++;
9038 while (p
< pend
&& ASCII_CHAR_P (*(pend
- 1))) pend
--;
9040 work_table
= Fmake_char_table (Qnil
, Qnil
);
9043 if (ASCII_CHAR_P (*p
))
9047 c
= STRING_CHAR_ADVANCE (p
);
9048 if (!NILP (char_table_ref (work_table
, c
)))
9049 /* This character was already checked. Ignore it. */
9052 charset_map_loaded
= 0;
9053 for (tail
= coding_attrs_list
; CONSP (tail
);)
9058 else if (char_encodable_p (c
, elt
))
9060 else if (CONSP (XCDR (tail
)))
9062 XSETCAR (tail
, XCAR (XCDR (tail
)));
9063 XSETCDR (tail
, XCDR (XCDR (tail
)));
9067 XSETCAR (tail
, Qnil
);
9071 if (charset_map_loaded
)
9073 ptrdiff_t p_offset
= p
- pbeg
, pend_offset
= pend
- pbeg
;
9075 if (STRINGP (start
))
9076 pbeg
= SDATA (start
);
9078 pbeg
= BYTE_POS_ADDR (start_byte
);
9079 p
= pbeg
+ p_offset
;
9080 pend
= pbeg
+ pend_offset
;
9082 char_table_set (work_table
, c
, Qt
);
9086 safe_codings
= list2 (Qraw_text
, Qno_conversion
);
9087 for (tail
= coding_attrs_list
; CONSP (tail
); tail
= XCDR (tail
))
9088 if (! NILP (XCAR (tail
)))
9089 safe_codings
= Fcons (CODING_ATTR_BASE_NAME (XCAR (tail
)), safe_codings
);
9091 return safe_codings
;
9095 DEFUN ("unencodable-char-position", Funencodable_char_position
,
9096 Sunencodable_char_position
, 3, 5, 0,
9097 doc
: /* Return position of first un-encodable character in a region.
9098 START and END specify the region and CODING-SYSTEM specifies the
9099 encoding to check. Return nil if CODING-SYSTEM does encode the region.
9101 If optional 4th argument COUNT is non-nil, it specifies at most how
9102 many un-encodable characters to search. In this case, the value is a
9105 If optional 5th argument STRING is non-nil, it is a string to search
9106 for un-encodable characters. In that case, START and END are indexes
9107 to the string and treated as in `substring'. */)
9108 (Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system
,
9109 Lisp_Object count
, Lisp_Object string
)
9112 struct coding_system coding
;
9113 Lisp_Object attrs
, charset_list
, translation_table
;
9114 Lisp_Object positions
;
9116 const unsigned char *p
, *stop
, *pend
;
9117 bool ascii_compatible
;
9119 setup_coding_system (Fcheck_coding_system (coding_system
), &coding
);
9120 attrs
= CODING_ID_ATTRS (coding
.id
);
9121 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
9123 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
9124 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
9125 translation_table
= get_translation_table (attrs
, 1, NULL
);
9129 validate_region (&start
, &end
);
9130 from
= XINT (start
);
9132 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
9133 || (ascii_compatible
9134 && (to
- from
) == (CHAR_TO_BYTE (to
) - (CHAR_TO_BYTE (from
)))))
9136 p
= CHAR_POS_ADDR (from
);
9137 pend
= CHAR_POS_ADDR (to
);
9138 if (from
< GPT
&& to
>= GPT
)
9145 CHECK_STRING (string
);
9146 validate_subarray (string
, start
, end
, SCHARS (string
), &from
, &to
);
9147 if (! STRING_MULTIBYTE (string
))
9149 p
= SDATA (string
) + string_char_to_byte (string
, from
);
9150 stop
= pend
= SDATA (string
) + string_char_to_byte (string
, to
);
9151 if (ascii_compatible
&& (to
- from
) == (pend
- p
))
9159 CHECK_NATNUM (count
);
9164 charset_map_loaded
= 0;
9169 if (ascii_compatible
)
9170 while (p
< stop
&& ASCII_CHAR_P (*p
))
9180 c
= STRING_CHAR_ADVANCE (p
);
9181 if (! (ASCII_CHAR_P (c
) && ascii_compatible
)
9182 && ! char_charset (translate_char (translation_table
, c
),
9183 charset_list
, NULL
))
9185 positions
= Fcons (make_number (from
), positions
);
9192 if (charset_map_loaded
&& NILP (string
))
9194 p
= CHAR_POS_ADDR (from
);
9195 pend
= CHAR_POS_ADDR (to
);
9196 if (from
< GPT
&& to
>= GPT
)
9200 charset_map_loaded
= 0;
9204 return (NILP (count
) ? Fcar (positions
) : Fnreverse (positions
));
9208 DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region
,
9209 Scheck_coding_systems_region
, 3, 3, 0,
9210 doc
: /* Check if the region is encodable by coding systems.
9212 START and END are buffer positions specifying the region.
9213 CODING-SYSTEM-LIST is a list of coding systems to check.
9215 The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where
9216 CODING-SYSTEM is a member of CODING-SYSTEM-LIST and can't encode the
9217 whole region, POS0, POS1, ... are buffer positions where non-encodable
9218 characters are found.
9220 If all coding systems in CODING-SYSTEM-LIST can encode the region, the
9223 START may be a string. In that case, check if the string is
9224 encodable, and the value contains indices to the string instead of
9225 buffer positions. END is ignored.
9227 If the current buffer (or START if it is a string) is unibyte, the value
9229 (Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system_list
)
9232 ptrdiff_t start_byte
, end_byte
;
9234 const unsigned char *p
, *pbeg
, *pend
;
9236 Lisp_Object tail
, elt
, attrs
;
9238 if (STRINGP (start
))
9240 if (!STRING_MULTIBYTE (start
)
9241 || SCHARS (start
) == SBYTES (start
))
9244 end_byte
= SBYTES (start
);
9249 CHECK_NUMBER_COERCE_MARKER (start
);
9250 CHECK_NUMBER_COERCE_MARKER (end
);
9251 if (XINT (start
) < BEG
|| XINT (end
) > Z
|| XINT (start
) > XINT (end
))
9252 args_out_of_range (start
, end
);
9253 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
9255 start_byte
= CHAR_TO_BYTE (XINT (start
));
9256 end_byte
= CHAR_TO_BYTE (XINT (end
));
9257 if (XINT (end
) - XINT (start
) == end_byte
- start_byte
)
9260 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
9262 if ((GPT
- XINT (start
)) < (XINT (end
) - GPT
))
9263 move_gap_both (XINT (start
), start_byte
);
9265 move_gap_both (XINT (end
), end_byte
);
9271 for (tail
= coding_system_list
; CONSP (tail
); tail
= XCDR (tail
))
9274 attrs
= AREF (CODING_SYSTEM_SPEC (elt
), 0);
9275 ASET (attrs
, coding_attr_trans_tbl
,
9276 get_translation_table (attrs
, 1, NULL
));
9277 list
= Fcons (list2 (elt
, attrs
), list
);
9280 if (STRINGP (start
))
9281 p
= pbeg
= SDATA (start
);
9283 p
= pbeg
= BYTE_POS_ADDR (start_byte
);
9284 pend
= p
+ (end_byte
- start_byte
);
9286 while (p
< pend
&& ASCII_CHAR_P (*p
)) p
++, pos
++;
9287 while (p
< pend
&& ASCII_CHAR_P (*(pend
- 1))) pend
--;
9291 if (ASCII_CHAR_P (*p
))
9295 c
= STRING_CHAR_ADVANCE (p
);
9297 charset_map_loaded
= 0;
9298 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
9300 elt
= XCDR (XCAR (tail
));
9301 if (! char_encodable_p (c
, XCAR (elt
)))
9302 XSETCDR (elt
, Fcons (make_number (pos
), XCDR (elt
)));
9304 if (charset_map_loaded
)
9306 ptrdiff_t p_offset
= p
- pbeg
, pend_offset
= pend
- pbeg
;
9308 if (STRINGP (start
))
9309 pbeg
= SDATA (start
);
9311 pbeg
= BYTE_POS_ADDR (start_byte
);
9312 p
= pbeg
+ p_offset
;
9313 pend
= pbeg
+ pend_offset
;
9321 for (; CONSP (tail
); tail
= XCDR (tail
))
9324 if (CONSP (XCDR (XCDR (elt
))))
9325 list
= Fcons (Fcons (XCAR (elt
), Fnreverse (XCDR (XCDR (elt
)))),
9334 code_convert_region (Lisp_Object start
, Lisp_Object end
,
9335 Lisp_Object coding_system
, Lisp_Object dst_object
,
9336 bool encodep
, bool norecord
)
9338 struct coding_system coding
;
9339 ptrdiff_t from
, from_byte
, to
, to_byte
;
9340 Lisp_Object src_object
;
9342 if (NILP (coding_system
))
9343 coding_system
= Qno_conversion
;
9345 CHECK_CODING_SYSTEM (coding_system
);
9346 src_object
= Fcurrent_buffer ();
9347 if (NILP (dst_object
))
9348 dst_object
= src_object
;
9349 else if (! EQ (dst_object
, Qt
))
9350 CHECK_BUFFER (dst_object
);
9352 validate_region (&start
, &end
);
9353 from
= XFASTINT (start
);
9354 from_byte
= CHAR_TO_BYTE (from
);
9355 to
= XFASTINT (end
);
9356 to_byte
= CHAR_TO_BYTE (to
);
9358 setup_coding_system (coding_system
, &coding
);
9359 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
9361 if (BUFFERP (dst_object
) && !EQ (dst_object
, src_object
))
9363 struct buffer
*buf
= XBUFFER (dst_object
);
9364 ptrdiff_t buf_pt
= BUF_PT (buf
);
9366 invalidate_buffer_caches (buf
, buf_pt
, buf_pt
);
9370 encode_coding_object (&coding
, src_object
, from
, from_byte
, to
, to_byte
,
9373 decode_coding_object (&coding
, src_object
, from
, from_byte
, to
, to_byte
,
9376 Vlast_coding_system_used
= CODING_ID_NAME (coding
.id
);
9378 return (BUFFERP (dst_object
)
9379 ? make_number (coding
.produced_char
)
9380 : coding
.dst_object
);
9384 DEFUN ("decode-coding-region", Fdecode_coding_region
, Sdecode_coding_region
,
9385 3, 4, "r\nzCoding system: ",
9386 doc
: /* Decode the current region from the specified coding system.
9387 When called from a program, takes four arguments:
9388 START, END, CODING-SYSTEM, and DESTINATION.
9389 START and END are buffer positions.
9391 Optional 4th arguments DESTINATION specifies where the decoded text goes.
9392 If nil, the region between START and END is replaced by the decoded text.
9393 If buffer, the decoded text is inserted in that buffer after point (point
9395 In those cases, the length of the decoded text is returned.
9396 If DESTINATION is t, the decoded text is returned.
9398 This function sets `last-coding-system-used' to the precise coding system
9399 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
9400 not fully specified.) */)
9401 (Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system
, Lisp_Object destination
)
9403 return code_convert_region (start
, end
, coding_system
, destination
, 0, 0);
9406 DEFUN ("encode-coding-region", Fencode_coding_region
, Sencode_coding_region
,
9407 3, 4, "r\nzCoding system: ",
9408 doc
: /* Encode the current region by specified coding system.
9409 When called from a program, takes four arguments:
9410 START, END, CODING-SYSTEM and DESTINATION.
9411 START and END are buffer positions.
9413 Optional 4th arguments DESTINATION specifies where the encoded text goes.
9414 If nil, the region between START and END is replace by the encoded text.
9415 If buffer, the encoded text is inserted in that buffer after point (point
9417 In those cases, the length of the encoded text is returned.
9418 If DESTINATION is t, the encoded text is returned.
9420 This function sets `last-coding-system-used' to the precise coding system
9421 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
9422 not fully specified.) */)
9423 (Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system
, Lisp_Object destination
)
9425 return code_convert_region (start
, end
, coding_system
, destination
, 1, 0);
9429 code_convert_string (Lisp_Object string
, Lisp_Object coding_system
,
9430 Lisp_Object dst_object
, bool encodep
, bool nocopy
,
9433 struct coding_system coding
;
9434 ptrdiff_t chars
, bytes
;
9436 CHECK_STRING (string
);
9437 if (NILP (coding_system
))
9440 Vlast_coding_system_used
= Qno_conversion
;
9441 if (NILP (dst_object
))
9442 return (nocopy
? Fcopy_sequence (string
) : string
);
9445 if (NILP (coding_system
))
9446 coding_system
= Qno_conversion
;
9448 CHECK_CODING_SYSTEM (coding_system
);
9449 if (NILP (dst_object
))
9451 else if (! EQ (dst_object
, Qt
))
9452 CHECK_BUFFER (dst_object
);
9454 setup_coding_system (coding_system
, &coding
);
9455 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
9456 chars
= SCHARS (string
);
9457 bytes
= SBYTES (string
);
9459 if (BUFFERP (dst_object
))
9461 struct buffer
*buf
= XBUFFER (dst_object
);
9462 ptrdiff_t buf_pt
= BUF_PT (buf
);
9464 invalidate_buffer_caches (buf
, buf_pt
, buf_pt
);
9468 encode_coding_object (&coding
, string
, 0, 0, chars
, bytes
, dst_object
);
9470 decode_coding_object (&coding
, string
, 0, 0, chars
, bytes
, dst_object
);
9472 Vlast_coding_system_used
= CODING_ID_NAME (coding
.id
);
9474 return (BUFFERP (dst_object
)
9475 ? make_number (coding
.produced_char
)
9476 : coding
.dst_object
);
9480 /* Encode or decode STRING according to CODING_SYSTEM.
9481 Do not set Vlast_coding_system_used.
9483 This function is called only from macros DECODE_FILE and
9484 ENCODE_FILE, thus we ignore character composition. */
9487 code_convert_string_norecord (Lisp_Object string
, Lisp_Object coding_system
,
9490 return code_convert_string (string
, coding_system
, Qt
, encodep
, 0, 1);
9493 /* Encode or decode a file name, to or from a unibyte string suitable
9494 for passing to C library functions. */
9496 decode_file_name (Lisp_Object fname
)
9499 /* The w32 build pretends to use UTF-8 for file-name encoding, and
9500 converts the file names either to UTF-16LE or to the system ANSI
9501 codepage internally, depending on the underlying OS; see w32.c. */
9502 if (! NILP (Fcoding_system_p (Qutf_8
)))
9503 return code_convert_string_norecord (fname
, Qutf_8
, 0);
9505 #else /* !WINDOWSNT */
9506 if (! NILP (Vfile_name_coding_system
))
9507 return code_convert_string_norecord (fname
, Vfile_name_coding_system
, 0);
9508 else if (! NILP (Vdefault_file_name_coding_system
))
9509 return code_convert_string_norecord (fname
,
9510 Vdefault_file_name_coding_system
, 0);
9517 encode_file_name (Lisp_Object fname
)
9519 /* This is especially important during bootstrap and dumping, when
9520 file-name encoding is not yet known, and therefore any non-ASCII
9521 file names are unibyte strings, and could only be thrashed if we
9522 try to encode them. */
9523 if (!STRING_MULTIBYTE (fname
))
9526 /* The w32 build pretends to use UTF-8 for file-name encoding, and
9527 converts the file names either to UTF-16LE or to the system ANSI
9528 codepage internally, depending on the underlying OS; see w32.c. */
9529 if (! NILP (Fcoding_system_p (Qutf_8
)))
9530 return code_convert_string_norecord (fname
, Qutf_8
, 1);
9532 #else /* !WINDOWSNT */
9533 if (! NILP (Vfile_name_coding_system
))
9534 return code_convert_string_norecord (fname
, Vfile_name_coding_system
, 1);
9535 else if (! NILP (Vdefault_file_name_coding_system
))
9536 return code_convert_string_norecord (fname
,
9537 Vdefault_file_name_coding_system
, 1);
9543 DEFUN ("decode-coding-string", Fdecode_coding_string
, Sdecode_coding_string
,
9545 doc
: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result.
9547 Optional third arg NOCOPY non-nil means it is OK to return STRING itself
9548 if the decoding operation is trivial.
9550 Optional fourth arg BUFFER non-nil means that the decoded text is
9551 inserted in that buffer after point (point does not move). In this
9552 case, the return value is the length of the decoded text.
9554 This function sets `last-coding-system-used' to the precise coding system
9555 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
9556 not fully specified.) */)
9557 (Lisp_Object string
, Lisp_Object coding_system
, Lisp_Object nocopy
, Lisp_Object buffer
)
9559 return code_convert_string (string
, coding_system
, buffer
,
9560 0, ! NILP (nocopy
), 0);
9563 DEFUN ("encode-coding-string", Fencode_coding_string
, Sencode_coding_string
,
9565 doc
: /* Encode STRING to CODING-SYSTEM, and return the result.
9567 Optional third arg NOCOPY non-nil means it is OK to return STRING
9568 itself if the encoding operation is trivial.
9570 Optional fourth arg BUFFER non-nil means that the encoded text is
9571 inserted in that buffer after point (point does not move). In this
9572 case, the return value is the length of the encoded text.
9574 This function sets `last-coding-system-used' to the precise coding system
9575 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
9576 not fully specified.) */)
9577 (Lisp_Object string
, Lisp_Object coding_system
, Lisp_Object nocopy
, Lisp_Object buffer
)
9579 return code_convert_string (string
, coding_system
, buffer
,
9580 1, ! NILP (nocopy
), 0);
9584 DEFUN ("decode-sjis-char", Fdecode_sjis_char
, Sdecode_sjis_char
, 1, 1, 0,
9585 doc
: /* Decode a Japanese character which has CODE in shift_jis encoding.
9586 Return the corresponding character. */)
9589 Lisp_Object spec
, attrs
, val
;
9590 struct charset
*charset_roman
, *charset_kanji
, *charset_kana
, *charset
;
9594 CHECK_NATNUM (code
);
9595 ch
= XFASTINT (code
);
9596 CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system
, spec
);
9597 attrs
= AREF (spec
, 0);
9599 if (ASCII_CHAR_P (ch
)
9600 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
9603 val
= CODING_ATTR_CHARSET_LIST (attrs
);
9604 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
9605 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
9606 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
)));
9611 charset
= charset_roman
;
9613 else if (ch
>= 0xA0 && ch
< 0xDF)
9616 charset
= charset_kana
;
9620 EMACS_INT c1
= ch
>> 8;
9623 if (c1
< 0x81 || (c1
> 0x9F && c1
< 0xE0) || c1
> 0xEF
9624 || c2
< 0x40 || c2
== 0x7F || c2
> 0xFC)
9625 error ("Invalid code: %"pI
"d", ch
);
9628 charset
= charset_kanji
;
9630 c
= DECODE_CHAR (charset
, c
);
9632 error ("Invalid code: %"pI
"d", ch
);
9633 return make_number (c
);
9637 DEFUN ("encode-sjis-char", Fencode_sjis_char
, Sencode_sjis_char
, 1, 1, 0,
9638 doc
: /* Encode a Japanese character CH to shift_jis encoding.
9639 Return the corresponding code in SJIS. */)
9642 Lisp_Object spec
, attrs
, charset_list
;
9644 struct charset
*charset
;
9647 CHECK_CHARACTER (ch
);
9649 CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system
, spec
);
9650 attrs
= AREF (spec
, 0);
9652 if (ASCII_CHAR_P (c
)
9653 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
9656 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
9657 charset
= char_charset (c
, charset_list
, &code
);
9658 if (code
== CHARSET_INVALID_CODE (charset
))
9659 error ("Can't encode by shift_jis encoding: %c", c
);
9662 return make_number (code
);
9665 DEFUN ("decode-big5-char", Fdecode_big5_char
, Sdecode_big5_char
, 1, 1, 0,
9666 doc
: /* Decode a Big5 character which has CODE in BIG5 coding system.
9667 Return the corresponding character. */)
9670 Lisp_Object spec
, attrs
, val
;
9671 struct charset
*charset_roman
, *charset_big5
, *charset
;
9675 CHECK_NATNUM (code
);
9676 ch
= XFASTINT (code
);
9677 CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system
, spec
);
9678 attrs
= AREF (spec
, 0);
9680 if (ASCII_CHAR_P (ch
)
9681 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
9684 val
= CODING_ATTR_CHARSET_LIST (attrs
);
9685 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
9686 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
9691 charset
= charset_roman
;
9695 EMACS_INT b1
= ch
>> 8;
9697 if (b1
< 0xA1 || b1
> 0xFE
9698 || b2
< 0x40 || (b2
> 0x7E && b2
< 0xA1) || b2
> 0xFE)
9699 error ("Invalid code: %"pI
"d", ch
);
9701 charset
= charset_big5
;
9703 c
= DECODE_CHAR (charset
, c
);
9705 error ("Invalid code: %"pI
"d", ch
);
9706 return make_number (c
);
9709 DEFUN ("encode-big5-char", Fencode_big5_char
, Sencode_big5_char
, 1, 1, 0,
9710 doc
: /* Encode the Big5 character CH to BIG5 coding system.
9711 Return the corresponding character code in Big5. */)
9714 Lisp_Object spec
, attrs
, charset_list
;
9715 struct charset
*charset
;
9719 CHECK_CHARACTER (ch
);
9721 CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system
, spec
);
9722 attrs
= AREF (spec
, 0);
9723 if (ASCII_CHAR_P (c
)
9724 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
9727 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
9728 charset
= char_charset (c
, charset_list
, &code
);
9729 if (code
== CHARSET_INVALID_CODE (charset
))
9730 error ("Can't encode by Big5 encoding: %c", c
);
9732 return make_number (code
);
9736 DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal
,
9737 Sset_terminal_coding_system_internal
, 1, 2, 0,
9738 doc
: /* Internal use only. */)
9739 (Lisp_Object coding_system
, Lisp_Object terminal
)
9741 struct terminal
*term
= get_terminal (terminal
, 1);
9742 struct coding_system
*terminal_coding
= TERMINAL_TERMINAL_CODING (term
);
9743 CHECK_SYMBOL (coding_system
);
9744 setup_coding_system (Fcheck_coding_system (coding_system
), terminal_coding
);
9745 /* We had better not send unsafe characters to terminal. */
9746 terminal_coding
->mode
|= CODING_MODE_SAFE_ENCODING
;
9747 /* Character composition should be disabled. */
9748 terminal_coding
->common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
9749 terminal_coding
->src_multibyte
= 1;
9750 terminal_coding
->dst_multibyte
= 0;
9752 (term
, (terminal_coding
->common_flags
& CODING_REQUIRE_ENCODING_MASK
9753 ? coding_charset_list (terminal_coding
)
9754 : list1 (make_number (charset_ascii
))));
9758 DEFUN ("set-safe-terminal-coding-system-internal",
9759 Fset_safe_terminal_coding_system_internal
,
9760 Sset_safe_terminal_coding_system_internal
, 1, 1, 0,
9761 doc
: /* Internal use only. */)
9762 (Lisp_Object coding_system
)
9764 CHECK_SYMBOL (coding_system
);
9765 setup_coding_system (Fcheck_coding_system (coding_system
),
9766 &safe_terminal_coding
);
9767 /* Character composition should be disabled. */
9768 safe_terminal_coding
.common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
9769 safe_terminal_coding
.src_multibyte
= 1;
9770 safe_terminal_coding
.dst_multibyte
= 0;
9774 DEFUN ("terminal-coding-system", Fterminal_coding_system
,
9775 Sterminal_coding_system
, 0, 1, 0,
9776 doc
: /* Return coding system specified for terminal output on the given terminal.
9777 TERMINAL may be a terminal object, a frame, or nil for the selected
9778 frame's terminal device. */)
9779 (Lisp_Object terminal
)
9781 struct coding_system
*terminal_coding
9782 = TERMINAL_TERMINAL_CODING (get_terminal (terminal
, 1));
9783 Lisp_Object coding_system
= CODING_ID_NAME (terminal_coding
->id
);
9785 /* For backward compatibility, return nil if it is `undecided'. */
9786 return (! EQ (coding_system
, Qundecided
) ? coding_system
: Qnil
);
9789 DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal
,
9790 Sset_keyboard_coding_system_internal
, 1, 2, 0,
9791 doc
: /* Internal use only. */)
9792 (Lisp_Object coding_system
, Lisp_Object terminal
)
9794 struct terminal
*t
= get_terminal (terminal
, 1);
9795 CHECK_SYMBOL (coding_system
);
9796 if (NILP (coding_system
))
9797 coding_system
= Qno_conversion
;
9799 Fcheck_coding_system (coding_system
);
9800 setup_coding_system (coding_system
, TERMINAL_KEYBOARD_CODING (t
));
9801 /* Character composition should be disabled. */
9802 TERMINAL_KEYBOARD_CODING (t
)->common_flags
9803 &= ~CODING_ANNOTATE_COMPOSITION_MASK
;
9807 DEFUN ("keyboard-coding-system",
9808 Fkeyboard_coding_system
, Skeyboard_coding_system
, 0, 1, 0,
9809 doc
: /* Return coding system specified for decoding keyboard input. */)
9810 (Lisp_Object terminal
)
9812 return CODING_ID_NAME (TERMINAL_KEYBOARD_CODING
9813 (get_terminal (terminal
, 1))->id
);
9817 DEFUN ("find-operation-coding-system", Ffind_operation_coding_system
,
9818 Sfind_operation_coding_system
, 1, MANY
, 0,
9819 doc
: /* Choose a coding system for an operation based on the target name.
9820 The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM).
9821 DECODING-SYSTEM is the coding system to use for decoding
9822 \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system
9823 for encoding (in case OPERATION does encoding).
9825 The first argument OPERATION specifies an I/O primitive:
9826 For file I/O, `insert-file-contents' or `write-region'.
9827 For process I/O, `call-process', `call-process-region', or `start-process'.
9828 For network I/O, `open-network-stream'.
9830 The remaining arguments should be the same arguments that were passed
9831 to the primitive. Depending on which primitive, one of those arguments
9832 is selected as the TARGET. For example, if OPERATION does file I/O,
9833 whichever argument specifies the file name is TARGET.
9835 TARGET has a meaning which depends on OPERATION:
9836 For file I/O, TARGET is a file name (except for the special case below).
9837 For process I/O, TARGET is a process name.
9838 For network I/O, TARGET is a service name or a port number.
9840 This function looks up what is specified for TARGET in
9841 `file-coding-system-alist', `process-coding-system-alist',
9842 or `network-coding-system-alist' depending on OPERATION.
9843 They may specify a coding system, a cons of coding systems,
9844 or a function symbol to call.
9845 In the last case, we call the function with one argument,
9846 which is a list of all the arguments given to this function.
9847 If the function can't decide a coding system, it can return
9848 `undecided' so that the normal code-detection is performed.
9850 If OPERATION is `insert-file-contents', the argument corresponding to
9851 TARGET may be a cons (FILENAME . BUFFER). In that case, FILENAME is a
9852 file name to look up, and BUFFER is a buffer that contains the file's
9853 contents (not yet decoded). If `file-coding-system-alist' specifies a
9854 function to call for FILENAME, that function should examine the
9855 contents of BUFFER instead of reading the file.
9857 usage: (find-operation-coding-system OPERATION ARGUMENTS...) */)
9858 (ptrdiff_t nargs
, Lisp_Object
*args
)
9860 Lisp_Object operation
, target_idx
, target
, val
;
9861 register Lisp_Object chain
;
9864 error ("Too few arguments");
9865 operation
= args
[0];
9866 if (!SYMBOLP (operation
)
9867 || (target_idx
= Fget (operation
, Qtarget_idx
), !NATNUMP (target_idx
)))
9868 error ("Invalid first argument");
9869 if (nargs
<= 1 + XFASTINT (target_idx
))
9870 error ("Too few arguments for operation `%s'",
9871 SDATA (SYMBOL_NAME (operation
)));
9872 target
= args
[XFASTINT (target_idx
) + 1];
9873 if (!(STRINGP (target
)
9874 || (EQ (operation
, Qinsert_file_contents
) && CONSP (target
)
9875 && STRINGP (XCAR (target
)) && BUFFERP (XCDR (target
)))
9876 || (EQ (operation
, Qopen_network_stream
) && INTEGERP (target
))))
9877 error ("Invalid argument %"pI
"d of operation `%s'",
9878 XFASTINT (target_idx
) + 1, SDATA (SYMBOL_NAME (operation
)));
9880 target
= XCAR (target
);
9882 chain
= ((EQ (operation
, Qinsert_file_contents
)
9883 || EQ (operation
, Qwrite_region
))
9884 ? Vfile_coding_system_alist
9885 : (EQ (operation
, Qopen_network_stream
)
9886 ? Vnetwork_coding_system_alist
9887 : Vprocess_coding_system_alist
));
9891 for (; CONSP (chain
); chain
= XCDR (chain
))
9897 && ((STRINGP (target
)
9898 && STRINGP (XCAR (elt
))
9899 && fast_string_match (XCAR (elt
), target
) >= 0)
9900 || (INTEGERP (target
) && EQ (target
, XCAR (elt
)))))
9903 /* Here, if VAL is both a valid coding system and a valid
9904 function symbol, we return VAL as a coding system. */
9907 if (! SYMBOLP (val
))
9909 if (! NILP (Fcoding_system_p (val
)))
9910 return Fcons (val
, val
);
9911 if (! NILP (Ffboundp (val
)))
9913 /* We use call1 rather than safe_call1
9914 so as to get bug reports about functions called here
9915 which don't handle the current interface. */
9916 val
= call1 (val
, Flist (nargs
, args
));
9919 if (SYMBOLP (val
) && ! NILP (Fcoding_system_p (val
)))
9920 return Fcons (val
, val
);
9928 DEFUN ("set-coding-system-priority", Fset_coding_system_priority
,
9929 Sset_coding_system_priority
, 0, MANY
, 0,
9930 doc
: /* Assign higher priority to the coding systems given as arguments.
9931 If multiple coding systems belong to the same category,
9932 all but the first one are ignored.
9934 usage: (set-coding-system-priority &rest coding-systems) */)
9935 (ptrdiff_t nargs
, Lisp_Object
*args
)
9938 bool changed
[coding_category_max
];
9939 enum coding_category priorities
[coding_category_max
];
9941 memset (changed
, 0, sizeof changed
);
9943 for (i
= j
= 0; i
< nargs
; i
++)
9945 enum coding_category category
;
9946 Lisp_Object spec
, attrs
;
9948 CHECK_CODING_SYSTEM_GET_SPEC (args
[i
], spec
);
9949 attrs
= AREF (spec
, 0);
9950 category
= XINT (CODING_ATTR_CATEGORY (attrs
));
9951 if (changed
[category
])
9952 /* Ignore this coding system because a coding system of the
9953 same category already had a higher priority. */
9955 changed
[category
] = 1;
9956 priorities
[j
++] = category
;
9957 if (coding_categories
[category
].id
>= 0
9958 && ! EQ (args
[i
], CODING_ID_NAME (coding_categories
[category
].id
)))
9959 setup_coding_system (args
[i
], &coding_categories
[category
]);
9960 Fset (AREF (Vcoding_category_table
, category
), args
[i
]);
9963 /* Now we have decided top J priorities. Reflect the order of the
9964 original priorities to the remaining priorities. */
9966 for (i
= j
, j
= 0; i
< coding_category_max
; i
++, j
++)
9968 while (j
< coding_category_max
9969 && changed
[coding_priorities
[j
]])
9971 if (j
== coding_category_max
)
9973 priorities
[i
] = coding_priorities
[j
];
9976 memcpy (coding_priorities
, priorities
, sizeof priorities
);
9978 /* Update `coding-category-list'. */
9979 Vcoding_category_list
= Qnil
;
9980 for (i
= coding_category_max
; i
-- > 0; )
9981 Vcoding_category_list
9982 = Fcons (AREF (Vcoding_category_table
, priorities
[i
]),
9983 Vcoding_category_list
);
9988 DEFUN ("coding-system-priority-list", Fcoding_system_priority_list
,
9989 Scoding_system_priority_list
, 0, 1, 0,
9990 doc
: /* Return a list of coding systems ordered by their priorities.
9991 The list contains a subset of coding systems; i.e. coding systems
9992 assigned to each coding category (see `coding-category-list').
9994 HIGHESTP non-nil means just return the highest priority one. */)
9995 (Lisp_Object highestp
)
10000 for (i
= 0, val
= Qnil
; i
< coding_category_max
; i
++)
10002 enum coding_category category
= coding_priorities
[i
];
10003 int id
= coding_categories
[category
].id
;
10008 attrs
= CODING_ID_ATTRS (id
);
10009 if (! NILP (highestp
))
10010 return CODING_ATTR_BASE_NAME (attrs
);
10011 val
= Fcons (CODING_ATTR_BASE_NAME (attrs
), val
);
10013 return Fnreverse (val
);
10016 static const char *const suffixes
[] = { "-unix", "-dos", "-mac" };
10019 make_subsidiaries (Lisp_Object base
)
10021 Lisp_Object subsidiaries
;
10022 ptrdiff_t base_name_len
= SBYTES (SYMBOL_NAME (base
));
10023 char *buf
= alloca (base_name_len
+ 6);
10026 memcpy (buf
, SDATA (SYMBOL_NAME (base
)), base_name_len
);
10027 subsidiaries
= make_uninit_vector (3);
10028 for (i
= 0; i
< 3; i
++)
10030 strcpy (buf
+ base_name_len
, suffixes
[i
]);
10031 ASET (subsidiaries
, i
, intern (buf
));
10033 return subsidiaries
;
10037 DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal
,
10038 Sdefine_coding_system_internal
, coding_arg_max
, MANY
, 0,
10039 doc
: /* For internal use only.
10040 usage: (define-coding-system-internal ...) */)
10041 (ptrdiff_t nargs
, Lisp_Object
*args
)
10044 Lisp_Object spec_vec
; /* [ ATTRS ALIASE EOL_TYPE ] */
10045 Lisp_Object attrs
; /* Vector of attributes. */
10046 Lisp_Object eol_type
;
10047 Lisp_Object aliases
;
10048 Lisp_Object coding_type
, charset_list
, safe_charsets
;
10049 enum coding_category category
;
10050 Lisp_Object tail
, val
;
10051 int max_charset_id
= 0;
10054 if (nargs
< coding_arg_max
)
10057 attrs
= Fmake_vector (make_number (coding_attr_last_index
), Qnil
);
10059 name
= args
[coding_arg_name
];
10060 CHECK_SYMBOL (name
);
10061 ASET (attrs
, coding_attr_base_name
, name
);
10063 val
= args
[coding_arg_mnemonic
];
10064 if (! STRINGP (val
))
10065 CHECK_CHARACTER (val
);
10066 ASET (attrs
, coding_attr_mnemonic
, val
);
10068 coding_type
= args
[coding_arg_coding_type
];
10069 CHECK_SYMBOL (coding_type
);
10070 ASET (attrs
, coding_attr_type
, coding_type
);
10072 charset_list
= args
[coding_arg_charset_list
];
10073 if (SYMBOLP (charset_list
))
10075 if (EQ (charset_list
, Qiso_2022
))
10077 if (! EQ (coding_type
, Qiso_2022
))
10078 error ("Invalid charset-list");
10079 charset_list
= Viso_2022_charset_list
;
10081 else if (EQ (charset_list
, Qemacs_mule
))
10083 if (! EQ (coding_type
, Qemacs_mule
))
10084 error ("Invalid charset-list");
10085 charset_list
= Vemacs_mule_charset_list
;
10087 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
10089 if (! RANGED_INTEGERP (0, XCAR (tail
), INT_MAX
- 1))
10090 error ("Invalid charset-list");
10091 if (max_charset_id
< XFASTINT (XCAR (tail
)))
10092 max_charset_id
= XFASTINT (XCAR (tail
));
10097 charset_list
= Fcopy_sequence (charset_list
);
10098 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
10100 struct charset
*charset
;
10103 CHECK_CHARSET_GET_CHARSET (val
, charset
);
10104 if (EQ (coding_type
, Qiso_2022
)
10105 ? CHARSET_ISO_FINAL (charset
) < 0
10106 : EQ (coding_type
, Qemacs_mule
)
10107 ? CHARSET_EMACS_MULE_ID (charset
) < 0
10109 error ("Can't handle charset `%s'",
10110 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10112 XSETCAR (tail
, make_number (charset
->id
));
10113 if (max_charset_id
< charset
->id
)
10114 max_charset_id
= charset
->id
;
10117 ASET (attrs
, coding_attr_charset_list
, charset_list
);
10119 safe_charsets
= make_uninit_string (max_charset_id
+ 1);
10120 memset (SDATA (safe_charsets
), 255, max_charset_id
+ 1);
10121 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
10122 SSET (safe_charsets
, XFASTINT (XCAR (tail
)), 0);
10123 ASET (attrs
, coding_attr_safe_charsets
, safe_charsets
);
10125 ASET (attrs
, coding_attr_ascii_compat
, args
[coding_arg_ascii_compatible_p
]);
10127 val
= args
[coding_arg_decode_translation_table
];
10128 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
10129 CHECK_SYMBOL (val
);
10130 ASET (attrs
, coding_attr_decode_tbl
, val
);
10132 val
= args
[coding_arg_encode_translation_table
];
10133 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
10134 CHECK_SYMBOL (val
);
10135 ASET (attrs
, coding_attr_encode_tbl
, val
);
10137 val
= args
[coding_arg_post_read_conversion
];
10138 CHECK_SYMBOL (val
);
10139 ASET (attrs
, coding_attr_post_read
, val
);
10141 val
= args
[coding_arg_pre_write_conversion
];
10142 CHECK_SYMBOL (val
);
10143 ASET (attrs
, coding_attr_pre_write
, val
);
10145 val
= args
[coding_arg_default_char
];
10147 ASET (attrs
, coding_attr_default_char
, make_number (' '));
10150 CHECK_CHARACTER (val
);
10151 ASET (attrs
, coding_attr_default_char
, val
);
10154 val
= args
[coding_arg_for_unibyte
];
10155 ASET (attrs
, coding_attr_for_unibyte
, NILP (val
) ? Qnil
: Qt
);
10157 val
= args
[coding_arg_plist
];
10159 ASET (attrs
, coding_attr_plist
, val
);
10161 if (EQ (coding_type
, Qcharset
))
10163 /* Generate a lisp vector of 256 elements. Each element is nil,
10164 integer, or a list of charset IDs.
10166 If Nth element is nil, the byte code N is invalid in this
10169 If Nth element is a number NUM, N is the first byte of a
10170 charset whose ID is NUM.
10172 If Nth element is a list of charset IDs, N is the first byte
10173 of one of them. The list is sorted by dimensions of the
10174 charsets. A charset of smaller dimension comes first. */
10175 val
= Fmake_vector (make_number (256), Qnil
);
10177 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
10179 struct charset
*charset
= CHARSET_FROM_ID (XFASTINT (XCAR (tail
)));
10180 int dim
= CHARSET_DIMENSION (charset
);
10181 int idx
= (dim
- 1) * 4;
10183 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
10184 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10186 for (i
= charset
->code_space
[idx
];
10187 i
<= charset
->code_space
[idx
+ 1]; i
++)
10189 Lisp_Object tmp
, tmp2
;
10192 tmp
= AREF (val
, i
);
10195 else if (NUMBERP (tmp
))
10197 dim2
= CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (tmp
)));
10199 tmp
= list2 (XCAR (tail
), tmp
);
10201 tmp
= list2 (tmp
, XCAR (tail
));
10205 for (tmp2
= tmp
; CONSP (tmp2
); tmp2
= XCDR (tmp2
))
10207 dim2
= CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (XCAR (tmp2
))));
10212 tmp
= nconc2 (tmp
, list1 (XCAR (tail
)));
10215 XSETCDR (tmp2
, Fcons (XCAR (tmp2
), XCDR (tmp2
)));
10216 XSETCAR (tmp2
, XCAR (tail
));
10219 ASET (val
, i
, tmp
);
10222 ASET (attrs
, coding_attr_charset_valids
, val
);
10223 category
= coding_category_charset
;
10225 else if (EQ (coding_type
, Qccl
))
10227 Lisp_Object valids
;
10229 if (nargs
< coding_arg_ccl_max
)
10232 val
= args
[coding_arg_ccl_decoder
];
10233 CHECK_CCL_PROGRAM (val
);
10235 val
= Fcopy_sequence (val
);
10236 ASET (attrs
, coding_attr_ccl_decoder
, val
);
10238 val
= args
[coding_arg_ccl_encoder
];
10239 CHECK_CCL_PROGRAM (val
);
10241 val
= Fcopy_sequence (val
);
10242 ASET (attrs
, coding_attr_ccl_encoder
, val
);
10244 val
= args
[coding_arg_ccl_valids
];
10245 valids
= Fmake_string (make_number (256), make_number (0));
10246 for (tail
= val
; CONSP (tail
); tail
= XCDR (tail
))
10251 if (INTEGERP (val
))
10253 if (! (0 <= XINT (val
) && XINT (val
) <= 255))
10254 args_out_of_range_3 (val
, make_number (0), make_number (255));
10255 from
= to
= XINT (val
);
10260 CHECK_NATNUM_CAR (val
);
10261 CHECK_NUMBER_CDR (val
);
10262 if (XINT (XCAR (val
)) > 255)
10263 args_out_of_range_3 (XCAR (val
),
10264 make_number (0), make_number (255));
10265 from
= XINT (XCAR (val
));
10266 if (! (from
<= XINT (XCDR (val
)) && XINT (XCDR (val
)) <= 255))
10267 args_out_of_range_3 (XCDR (val
),
10268 XCAR (val
), make_number (255));
10269 to
= XINT (XCDR (val
));
10271 for (i
= from
; i
<= to
; i
++)
10272 SSET (valids
, i
, 1);
10274 ASET (attrs
, coding_attr_ccl_valids
, valids
);
10276 category
= coding_category_ccl
;
10278 else if (EQ (coding_type
, Qutf_16
))
10280 Lisp_Object bom
, endian
;
10282 ASET (attrs
, coding_attr_ascii_compat
, Qnil
);
10284 if (nargs
< coding_arg_utf16_max
)
10287 bom
= args
[coding_arg_utf16_bom
];
10288 if (! NILP (bom
) && ! EQ (bom
, Qt
))
10292 CHECK_CODING_SYSTEM (val
);
10294 CHECK_CODING_SYSTEM (val
);
10296 ASET (attrs
, coding_attr_utf_bom
, bom
);
10298 endian
= args
[coding_arg_utf16_endian
];
10299 CHECK_SYMBOL (endian
);
10302 else if (! EQ (endian
, Qbig
) && ! EQ (endian
, Qlittle
))
10303 error ("Invalid endian: %s", SDATA (SYMBOL_NAME (endian
)));
10304 ASET (attrs
, coding_attr_utf_16_endian
, endian
);
10306 category
= (CONSP (bom
)
10307 ? coding_category_utf_16_auto
10309 ? (EQ (endian
, Qbig
)
10310 ? coding_category_utf_16_be_nosig
10311 : coding_category_utf_16_le_nosig
)
10312 : (EQ (endian
, Qbig
)
10313 ? coding_category_utf_16_be
10314 : coding_category_utf_16_le
));
10316 else if (EQ (coding_type
, Qiso_2022
))
10318 Lisp_Object initial
, reg_usage
, request
, flags
;
10320 if (nargs
< coding_arg_iso2022_max
)
10323 initial
= Fcopy_sequence (args
[coding_arg_iso2022_initial
]);
10324 CHECK_VECTOR (initial
);
10325 for (i
= 0; i
< 4; i
++)
10327 val
= AREF (initial
, i
);
10330 struct charset
*charset
;
10332 CHECK_CHARSET_GET_CHARSET (val
, charset
);
10333 ASET (initial
, i
, make_number (CHARSET_ID (charset
)));
10334 if (i
== 0 && CHARSET_ASCII_COMPATIBLE_P (charset
))
10335 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10338 ASET (initial
, i
, make_number (-1));
10341 reg_usage
= args
[coding_arg_iso2022_reg_usage
];
10342 CHECK_CONS (reg_usage
);
10343 CHECK_NUMBER_CAR (reg_usage
);
10344 CHECK_NUMBER_CDR (reg_usage
);
10346 request
= Fcopy_sequence (args
[coding_arg_iso2022_request
]);
10347 for (tail
= request
; CONSP (tail
); tail
= XCDR (tail
))
10355 CHECK_CHARSET_GET_ID (tmp1
, id
);
10356 CHECK_NATNUM_CDR (val
);
10357 if (XINT (XCDR (val
)) >= 4)
10358 error ("Invalid graphic register number: %"pI
"d", XINT (XCDR (val
)));
10359 XSETCAR (val
, make_number (id
));
10362 flags
= args
[coding_arg_iso2022_flags
];
10363 CHECK_NATNUM (flags
);
10364 i
= XINT (flags
) & INT_MAX
;
10365 if (EQ (args
[coding_arg_charset_list
], Qiso_2022
))
10366 i
|= CODING_ISO_FLAG_FULL_SUPPORT
;
10367 flags
= make_number (i
);
10369 ASET (attrs
, coding_attr_iso_initial
, initial
);
10370 ASET (attrs
, coding_attr_iso_usage
, reg_usage
);
10371 ASET (attrs
, coding_attr_iso_request
, request
);
10372 ASET (attrs
, coding_attr_iso_flags
, flags
);
10373 setup_iso_safe_charsets (attrs
);
10375 if (i
& CODING_ISO_FLAG_SEVEN_BITS
)
10376 category
= ((i
& (CODING_ISO_FLAG_LOCKING_SHIFT
10377 | CODING_ISO_FLAG_SINGLE_SHIFT
))
10378 ? coding_category_iso_7_else
10379 : EQ (args
[coding_arg_charset_list
], Qiso_2022
)
10380 ? coding_category_iso_7
10381 : coding_category_iso_7_tight
);
10384 int id
= XINT (AREF (initial
, 1));
10386 category
= (((i
& CODING_ISO_FLAG_LOCKING_SHIFT
)
10387 || EQ (args
[coding_arg_charset_list
], Qiso_2022
)
10389 ? coding_category_iso_8_else
10390 : (CHARSET_DIMENSION (CHARSET_FROM_ID (id
)) == 1)
10391 ? coding_category_iso_8_1
10392 : coding_category_iso_8_2
);
10394 if (category
!= coding_category_iso_8_1
10395 && category
!= coding_category_iso_8_2
)
10396 ASET (attrs
, coding_attr_ascii_compat
, Qnil
);
10398 else if (EQ (coding_type
, Qemacs_mule
))
10400 if (EQ (args
[coding_arg_charset_list
], Qemacs_mule
))
10401 ASET (attrs
, coding_attr_emacs_mule_full
, Qt
);
10402 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10403 category
= coding_category_emacs_mule
;
10405 else if (EQ (coding_type
, Qshift_jis
))
10408 struct charset
*charset
;
10410 if (XINT (Flength (charset_list
)) != 3
10411 && XINT (Flength (charset_list
)) != 4)
10412 error ("There should be three or four charsets");
10414 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10415 if (CHARSET_DIMENSION (charset
) != 1)
10416 error ("Dimension of charset %s is not one",
10417 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10418 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
10419 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10421 charset_list
= XCDR (charset_list
);
10422 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10423 if (CHARSET_DIMENSION (charset
) != 1)
10424 error ("Dimension of charset %s is not one",
10425 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10427 charset_list
= XCDR (charset_list
);
10428 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10429 if (CHARSET_DIMENSION (charset
) != 2)
10430 error ("Dimension of charset %s is not two",
10431 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10433 charset_list
= XCDR (charset_list
);
10434 if (! NILP (charset_list
))
10436 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10437 if (CHARSET_DIMENSION (charset
) != 2)
10438 error ("Dimension of charset %s is not two",
10439 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10442 category
= coding_category_sjis
;
10443 Vsjis_coding_system
= name
;
10445 else if (EQ (coding_type
, Qbig5
))
10447 struct charset
*charset
;
10449 if (XINT (Flength (charset_list
)) != 2)
10450 error ("There should be just two charsets");
10452 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10453 if (CHARSET_DIMENSION (charset
) != 1)
10454 error ("Dimension of charset %s is not one",
10455 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10456 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
10457 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10459 charset_list
= XCDR (charset_list
);
10460 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
10461 if (CHARSET_DIMENSION (charset
) != 2)
10462 error ("Dimension of charset %s is not two",
10463 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
10465 category
= coding_category_big5
;
10466 Vbig5_coding_system
= name
;
10468 else if (EQ (coding_type
, Qraw_text
))
10470 category
= coding_category_raw_text
;
10471 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10473 else if (EQ (coding_type
, Qutf_8
))
10477 if (nargs
< coding_arg_utf8_max
)
10480 bom
= args
[coding_arg_utf8_bom
];
10481 if (! NILP (bom
) && ! EQ (bom
, Qt
))
10485 CHECK_CODING_SYSTEM (val
);
10487 CHECK_CODING_SYSTEM (val
);
10489 ASET (attrs
, coding_attr_utf_bom
, bom
);
10491 ASET (attrs
, coding_attr_ascii_compat
, Qt
);
10493 category
= (CONSP (bom
) ? coding_category_utf_8_auto
10494 : NILP (bom
) ? coding_category_utf_8_nosig
10495 : coding_category_utf_8_sig
);
10497 else if (EQ (coding_type
, Qundecided
))
10499 if (nargs
< coding_arg_undecided_max
)
10501 ASET (attrs
, coding_attr_undecided_inhibit_null_byte_detection
,
10502 args
[coding_arg_undecided_inhibit_null_byte_detection
]);
10503 ASET (attrs
, coding_attr_undecided_inhibit_iso_escape_detection
,
10504 args
[coding_arg_undecided_inhibit_iso_escape_detection
]);
10505 ASET (attrs
, coding_attr_undecided_prefer_utf_8
,
10506 args
[coding_arg_undecided_prefer_utf_8
]);
10507 category
= coding_category_undecided
;
10510 error ("Invalid coding system type: %s",
10511 SDATA (SYMBOL_NAME (coding_type
)));
10513 ASET (attrs
, coding_attr_category
, make_number (category
));
10514 ASET (attrs
, coding_attr_plist
,
10516 Fcons (AREF (Vcoding_category_table
, category
),
10517 CODING_ATTR_PLIST (attrs
))));
10518 ASET (attrs
, coding_attr_plist
,
10519 Fcons (QCascii_compatible_p
,
10520 Fcons (CODING_ATTR_ASCII_COMPAT (attrs
),
10521 CODING_ATTR_PLIST (attrs
))));
10523 eol_type
= args
[coding_arg_eol_type
];
10524 if (! NILP (eol_type
)
10525 && ! EQ (eol_type
, Qunix
)
10526 && ! EQ (eol_type
, Qdos
)
10527 && ! EQ (eol_type
, Qmac
))
10528 error ("Invalid eol-type");
10530 aliases
= list1 (name
);
10532 if (NILP (eol_type
))
10534 eol_type
= make_subsidiaries (name
);
10535 for (i
= 0; i
< 3; i
++)
10537 Lisp_Object this_spec
, this_name
, this_aliases
, this_eol_type
;
10539 this_name
= AREF (eol_type
, i
);
10540 this_aliases
= list1 (this_name
);
10541 this_eol_type
= (i
== 0 ? Qunix
: i
== 1 ? Qdos
: Qmac
);
10542 this_spec
= make_uninit_vector (3);
10543 ASET (this_spec
, 0, attrs
);
10544 ASET (this_spec
, 1, this_aliases
);
10545 ASET (this_spec
, 2, this_eol_type
);
10546 Fputhash (this_name
, this_spec
, Vcoding_system_hash_table
);
10547 Vcoding_system_list
= Fcons (this_name
, Vcoding_system_list
);
10548 val
= Fassoc (Fsymbol_name (this_name
), Vcoding_system_alist
);
10550 Vcoding_system_alist
10551 = Fcons (Fcons (Fsymbol_name (this_name
), Qnil
),
10552 Vcoding_system_alist
);
10556 spec_vec
= make_uninit_vector (3);
10557 ASET (spec_vec
, 0, attrs
);
10558 ASET (spec_vec
, 1, aliases
);
10559 ASET (spec_vec
, 2, eol_type
);
10561 Fputhash (name
, spec_vec
, Vcoding_system_hash_table
);
10562 Vcoding_system_list
= Fcons (name
, Vcoding_system_list
);
10563 val
= Fassoc (Fsymbol_name (name
), Vcoding_system_alist
);
10565 Vcoding_system_alist
= Fcons (Fcons (Fsymbol_name (name
), Qnil
),
10566 Vcoding_system_alist
);
10569 int id
= coding_categories
[category
].id
;
10571 if (id
< 0 || EQ (name
, CODING_ID_NAME (id
)))
10572 setup_coding_system (name
, &coding_categories
[category
]);
10578 return Fsignal (Qwrong_number_of_arguments
,
10579 Fcons (intern ("define-coding-system-internal"),
10580 make_number (nargs
)));
10584 DEFUN ("coding-system-put", Fcoding_system_put
, Scoding_system_put
,
10586 doc
: /* Change value in CODING-SYSTEM's property list PROP to VAL. */)
10587 (Lisp_Object coding_system
, Lisp_Object prop
, Lisp_Object val
)
10589 Lisp_Object spec
, attrs
;
10591 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
10592 attrs
= AREF (spec
, 0);
10593 if (EQ (prop
, QCmnemonic
))
10595 if (! STRINGP (val
))
10596 CHECK_CHARACTER (val
);
10597 ASET (attrs
, coding_attr_mnemonic
, val
);
10599 else if (EQ (prop
, QCdefault_char
))
10602 val
= make_number (' ');
10604 CHECK_CHARACTER (val
);
10605 ASET (attrs
, coding_attr_default_char
, val
);
10607 else if (EQ (prop
, QCdecode_translation_table
))
10609 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
10610 CHECK_SYMBOL (val
);
10611 ASET (attrs
, coding_attr_decode_tbl
, val
);
10613 else if (EQ (prop
, QCencode_translation_table
))
10615 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
10616 CHECK_SYMBOL (val
);
10617 ASET (attrs
, coding_attr_encode_tbl
, val
);
10619 else if (EQ (prop
, QCpost_read_conversion
))
10621 CHECK_SYMBOL (val
);
10622 ASET (attrs
, coding_attr_post_read
, val
);
10624 else if (EQ (prop
, QCpre_write_conversion
))
10626 CHECK_SYMBOL (val
);
10627 ASET (attrs
, coding_attr_pre_write
, val
);
10629 else if (EQ (prop
, QCascii_compatible_p
))
10631 ASET (attrs
, coding_attr_ascii_compat
, val
);
10634 ASET (attrs
, coding_attr_plist
,
10635 Fplist_put (CODING_ATTR_PLIST (attrs
), prop
, val
));
10640 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias
,
10641 Sdefine_coding_system_alias
, 2, 2, 0,
10642 doc
: /* Define ALIAS as an alias for CODING-SYSTEM. */)
10643 (Lisp_Object alias
, Lisp_Object coding_system
)
10645 Lisp_Object spec
, aliases
, eol_type
, val
;
10647 CHECK_SYMBOL (alias
);
10648 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
10649 aliases
= AREF (spec
, 1);
10650 /* ALIASES should be a list of length more than zero, and the first
10651 element is a base coding system. Append ALIAS at the tail of the
10653 while (!NILP (XCDR (aliases
)))
10654 aliases
= XCDR (aliases
);
10655 XSETCDR (aliases
, list1 (alias
));
10657 eol_type
= AREF (spec
, 2);
10658 if (VECTORP (eol_type
))
10660 Lisp_Object subsidiaries
;
10663 subsidiaries
= make_subsidiaries (alias
);
10664 for (i
= 0; i
< 3; i
++)
10665 Fdefine_coding_system_alias (AREF (subsidiaries
, i
),
10666 AREF (eol_type
, i
));
10669 Fputhash (alias
, spec
, Vcoding_system_hash_table
);
10670 Vcoding_system_list
= Fcons (alias
, Vcoding_system_list
);
10671 val
= Fassoc (Fsymbol_name (alias
), Vcoding_system_alist
);
10673 Vcoding_system_alist
= Fcons (Fcons (Fsymbol_name (alias
), Qnil
),
10674 Vcoding_system_alist
);
10679 DEFUN ("coding-system-base", Fcoding_system_base
, Scoding_system_base
,
10681 doc
: /* Return the base of CODING-SYSTEM.
10682 Any alias or subsidiary coding system is not a base coding system. */)
10683 (Lisp_Object coding_system
)
10685 Lisp_Object spec
, attrs
;
10687 if (NILP (coding_system
))
10688 return (Qno_conversion
);
10689 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
10690 attrs
= AREF (spec
, 0);
10691 return CODING_ATTR_BASE_NAME (attrs
);
10694 DEFUN ("coding-system-plist", Fcoding_system_plist
, Scoding_system_plist
,
10696 doc
: "Return the property list of CODING-SYSTEM.")
10697 (Lisp_Object coding_system
)
10699 Lisp_Object spec
, attrs
;
10701 if (NILP (coding_system
))
10702 coding_system
= Qno_conversion
;
10703 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
10704 attrs
= AREF (spec
, 0);
10705 return CODING_ATTR_PLIST (attrs
);
10709 DEFUN ("coding-system-aliases", Fcoding_system_aliases
, Scoding_system_aliases
,
10711 doc
: /* Return the list of aliases of CODING-SYSTEM. */)
10712 (Lisp_Object coding_system
)
10716 if (NILP (coding_system
))
10717 coding_system
= Qno_conversion
;
10718 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
10719 return AREF (spec
, 1);
10722 DEFUN ("coding-system-eol-type", Fcoding_system_eol_type
,
10723 Scoding_system_eol_type
, 1, 1, 0,
10724 doc
: /* Return eol-type of CODING-SYSTEM.
10725 An eol-type is an integer 0, 1, 2, or a vector of coding systems.
10727 Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF,
10728 and CR respectively.
10730 A vector value indicates that a format of end-of-line should be
10731 detected automatically. Nth element of the vector is the subsidiary
10732 coding system whose eol-type is N. */)
10733 (Lisp_Object coding_system
)
10735 Lisp_Object spec
, eol_type
;
10738 if (NILP (coding_system
))
10739 coding_system
= Qno_conversion
;
10740 if (! CODING_SYSTEM_P (coding_system
))
10742 spec
= CODING_SYSTEM_SPEC (coding_system
);
10743 eol_type
= AREF (spec
, 2);
10744 if (VECTORP (eol_type
))
10745 return Fcopy_sequence (eol_type
);
10746 n
= EQ (eol_type
, Qunix
) ? 0 : EQ (eol_type
, Qdos
) ? 1 : 2;
10747 return make_number (n
);
10753 /*** 9. Post-amble ***/
10756 init_coding_once (void)
10760 for (i
= 0; i
< coding_category_max
; i
++)
10762 coding_categories
[i
].id
= -1;
10763 coding_priorities
[i
] = i
;
10766 /* ISO2022 specific initialize routine. */
10767 for (i
= 0; i
< 0x20; i
++)
10768 iso_code_class
[i
] = ISO_control_0
;
10769 for (i
= 0x21; i
< 0x7F; i
++)
10770 iso_code_class
[i
] = ISO_graphic_plane_0
;
10771 for (i
= 0x80; i
< 0xA0; i
++)
10772 iso_code_class
[i
] = ISO_control_1
;
10773 for (i
= 0xA1; i
< 0xFF; i
++)
10774 iso_code_class
[i
] = ISO_graphic_plane_1
;
10775 iso_code_class
[0x20] = iso_code_class
[0x7F] = ISO_0x20_or_0x7F
;
10776 iso_code_class
[0xA0] = iso_code_class
[0xFF] = ISO_0xA0_or_0xFF
;
10777 iso_code_class
[ISO_CODE_SO
] = ISO_shift_out
;
10778 iso_code_class
[ISO_CODE_SI
] = ISO_shift_in
;
10779 iso_code_class
[ISO_CODE_SS2_7
] = ISO_single_shift_2_7
;
10780 iso_code_class
[ISO_CODE_ESC
] = ISO_escape
;
10781 iso_code_class
[ISO_CODE_SS2
] = ISO_single_shift_2
;
10782 iso_code_class
[ISO_CODE_SS3
] = ISO_single_shift_3
;
10783 iso_code_class
[ISO_CODE_CSI
] = ISO_control_sequence_introducer
;
10785 for (i
= 0; i
< 256; i
++)
10787 emacs_mule_bytes
[i
] = 1;
10789 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_11
] = 3;
10790 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_12
] = 3;
10791 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_21
] = 4;
10792 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_22
] = 4;
10798 syms_of_coding (void)
10800 #include "coding.x"
10802 staticpro (&Vcoding_system_hash_table
);
10804 Lisp_Object args
[2];
10807 Vcoding_system_hash_table
= Fmake_hash_table (2, args
);
10810 staticpro (&Vsjis_coding_system
);
10811 Vsjis_coding_system
= Qnil
;
10813 staticpro (&Vbig5_coding_system
);
10814 Vbig5_coding_system
= Qnil
;
10816 staticpro (&Vcode_conversion_reused_workbuf
);
10817 Vcode_conversion_reused_workbuf
= Qnil
;
10819 staticpro (&Vcode_conversion_workbuf_name
);
10820 Vcode_conversion_workbuf_name
= build_pure_c_string (" *code-conversion-work*");
10822 reused_workbuf_in_use
= 0;
10824 DEFSYM (Qcharset
, "charset");
10825 DEFSYM (Qtarget_idx
, "target-idx");
10826 DEFSYM (Qcoding_system_history
, "coding-system-history");
10827 Fset (Qcoding_system_history
, Qnil
);
10829 /* Target FILENAME is the first argument. */
10830 Fput (Qinsert_file_contents
, Qtarget_idx
, make_number (0));
10831 /* Target FILENAME is the third argument. */
10832 Fput (Qwrite_region
, Qtarget_idx
, make_number (2));
10834 DEFSYM (Qcall_process
, "call-process");
10835 /* Target PROGRAM is the first argument. */
10836 Fput (Qcall_process
, Qtarget_idx
, make_number (0));
10838 DEFSYM (Qcall_process_region
, "call-process-region");
10839 /* Target PROGRAM is the third argument. */
10840 Fput (Qcall_process_region
, Qtarget_idx
, make_number (2));
10842 DEFSYM (Qstart_process
, "start-process");
10843 /* Target PROGRAM is the third argument. */
10844 Fput (Qstart_process
, Qtarget_idx
, make_number (2));
10846 DEFSYM (Qopen_network_stream
, "open-network-stream");
10847 /* Target SERVICE is the fourth argument. */
10848 Fput (Qopen_network_stream
, Qtarget_idx
, make_number (3));
10850 DEFSYM (Qcoding_system
, "coding-system");
10851 DEFSYM (Qcoding_aliases
, "coding-aliases");
10853 DEFSYM (Qeol_type
, "eol-type");
10854 DEFSYM (Qunix
, "unix");
10855 DEFSYM (Qdos
, "dos");
10856 DEFSYM (Qmac
, "mac");
10858 DEFSYM (Qbuffer_file_coding_system
, "buffer-file-coding-system");
10859 DEFSYM (Qpost_read_conversion
, "post-read-conversion");
10860 DEFSYM (Qpre_write_conversion
, "pre-write-conversion");
10861 DEFSYM (Qdefault_char
, "default-char");
10862 DEFSYM (Qundecided
, "undecided");
10863 DEFSYM (Qno_conversion
, "no-conversion");
10864 DEFSYM (Qraw_text
, "raw-text");
10866 DEFSYM (Qiso_2022
, "iso-2022");
10868 DEFSYM (Qutf_8
, "utf-8");
10869 DEFSYM (Qutf_8_emacs
, "utf-8-emacs");
10871 #if defined (WINDOWSNT) || defined (CYGWIN)
10872 /* No, not utf-16-le: that one has a BOM. */
10873 DEFSYM (Qutf_16le
, "utf-16le");
10876 DEFSYM (Qutf_16
, "utf-16");
10877 DEFSYM (Qbig
, "big");
10878 DEFSYM (Qlittle
, "little");
10880 DEFSYM (Qshift_jis
, "shift-jis");
10881 DEFSYM (Qbig5
, "big5");
10883 DEFSYM (Qcoding_system_p
, "coding-system-p");
10885 DEFSYM (Qcoding_system_error
, "coding-system-error");
10886 Fput (Qcoding_system_error
, Qerror_conditions
,
10887 listn (CONSTYPE_PURE
, 2, Qcoding_system_error
, Qerror
));
10888 Fput (Qcoding_system_error
, Qerror_message
,
10889 build_pure_c_string ("Invalid coding system"));
10891 DEFSYM (Qtranslation_table
, "translation-table");
10892 Fput (Qtranslation_table
, Qchar_table_extra_slots
, make_number (2));
10893 DEFSYM (Qtranslation_table_id
, "translation-table-id");
10894 DEFSYM (Qtranslation_table_for_decode
, "translation-table-for-decode");
10895 DEFSYM (Qtranslation_table_for_encode
, "translation-table-for-encode");
10897 DEFSYM (Qvalid_codes
, "valid-codes");
10899 DEFSYM (Qemacs_mule
, "emacs-mule");
10901 DEFSYM (QCcategory
, ":category");
10902 DEFSYM (QCmnemonic
, ":mnemonic");
10903 DEFSYM (QCdefault_char
, ":default-char");
10904 DEFSYM (QCdecode_translation_table
, ":decode-translation-table");
10905 DEFSYM (QCencode_translation_table
, ":encode-translation-table");
10906 DEFSYM (QCpost_read_conversion
, ":post-read-conversion");
10907 DEFSYM (QCpre_write_conversion
, ":pre-write-conversion");
10908 DEFSYM (QCascii_compatible_p
, ":ascii-compatible-p");
10910 Vcoding_category_table
10911 = Fmake_vector (make_number (coding_category_max
), Qnil
);
10912 staticpro (&Vcoding_category_table
);
10913 /* Followings are target of code detection. */
10914 ASET (Vcoding_category_table
, coding_category_iso_7
,
10915 intern_c_string ("coding-category-iso-7"));
10916 ASET (Vcoding_category_table
, coding_category_iso_7_tight
,
10917 intern_c_string ("coding-category-iso-7-tight"));
10918 ASET (Vcoding_category_table
, coding_category_iso_8_1
,
10919 intern_c_string ("coding-category-iso-8-1"));
10920 ASET (Vcoding_category_table
, coding_category_iso_8_2
,
10921 intern_c_string ("coding-category-iso-8-2"));
10922 ASET (Vcoding_category_table
, coding_category_iso_7_else
,
10923 intern_c_string ("coding-category-iso-7-else"));
10924 ASET (Vcoding_category_table
, coding_category_iso_8_else
,
10925 intern_c_string ("coding-category-iso-8-else"));
10926 ASET (Vcoding_category_table
, coding_category_utf_8_auto
,
10927 intern_c_string ("coding-category-utf-8-auto"));
10928 ASET (Vcoding_category_table
, coding_category_utf_8_nosig
,
10929 intern_c_string ("coding-category-utf-8"));
10930 ASET (Vcoding_category_table
, coding_category_utf_8_sig
,
10931 intern_c_string ("coding-category-utf-8-sig"));
10932 ASET (Vcoding_category_table
, coding_category_utf_16_be
,
10933 intern_c_string ("coding-category-utf-16-be"));
10934 ASET (Vcoding_category_table
, coding_category_utf_16_auto
,
10935 intern_c_string ("coding-category-utf-16-auto"));
10936 ASET (Vcoding_category_table
, coding_category_utf_16_le
,
10937 intern_c_string ("coding-category-utf-16-le"));
10938 ASET (Vcoding_category_table
, coding_category_utf_16_be_nosig
,
10939 intern_c_string ("coding-category-utf-16-be-nosig"));
10940 ASET (Vcoding_category_table
, coding_category_utf_16_le_nosig
,
10941 intern_c_string ("coding-category-utf-16-le-nosig"));
10942 ASET (Vcoding_category_table
, coding_category_charset
,
10943 intern_c_string ("coding-category-charset"));
10944 ASET (Vcoding_category_table
, coding_category_sjis
,
10945 intern_c_string ("coding-category-sjis"));
10946 ASET (Vcoding_category_table
, coding_category_big5
,
10947 intern_c_string ("coding-category-big5"));
10948 ASET (Vcoding_category_table
, coding_category_ccl
,
10949 intern_c_string ("coding-category-ccl"));
10950 ASET (Vcoding_category_table
, coding_category_emacs_mule
,
10951 intern_c_string ("coding-category-emacs-mule"));
10952 /* Followings are NOT target of code detection. */
10953 ASET (Vcoding_category_table
, coding_category_raw_text
,
10954 intern_c_string ("coding-category-raw-text"));
10955 ASET (Vcoding_category_table
, coding_category_undecided
,
10956 intern_c_string ("coding-category-undecided"));
10958 DEFSYM (Qinsufficient_source
, "insufficient-source");
10959 DEFSYM (Qinvalid_source
, "invalid-source");
10960 DEFSYM (Qinterrupted
, "interrupted");
10961 DEFSYM (Qcoding_system_define_form
, "coding-system-define-form");
10963 DEFVAR_LISP ("coding-system-list", Vcoding_system_list
,
10964 doc
: /* List of coding systems.
10966 Do not alter the value of this variable manually. This variable should be
10967 updated by the functions `define-coding-system' and
10968 `define-coding-system-alias'. */);
10969 Vcoding_system_list
= Qnil
;
10971 DEFVAR_LISP ("coding-system-alist", Vcoding_system_alist
,
10972 doc
: /* Alist of coding system names.
10973 Each element is one element list of coding system name.
10974 This variable is given to `completing-read' as COLLECTION argument.
10976 Do not alter the value of this variable manually. This variable should be
10977 updated by the functions `make-coding-system' and
10978 `define-coding-system-alias'. */);
10979 Vcoding_system_alist
= Qnil
;
10981 DEFVAR_LISP ("coding-category-list", Vcoding_category_list
,
10982 doc
: /* List of coding-categories (symbols) ordered by priority.
10984 On detecting a coding system, Emacs tries code detection algorithms
10985 associated with each coding-category one by one in this order. When
10986 one algorithm agrees with a byte sequence of source text, the coding
10987 system bound to the corresponding coding-category is selected.
10989 Don't modify this variable directly, but use `set-coding-system-priority'. */);
10993 Vcoding_category_list
= Qnil
;
10994 for (i
= coding_category_max
- 1; i
>= 0; i
--)
10995 Vcoding_category_list
10996 = Fcons (AREF (Vcoding_category_table
, i
),
10997 Vcoding_category_list
);
11000 DEFVAR_LISP ("coding-system-for-read", Vcoding_system_for_read
,
11001 doc
: /* Specify the coding system for read operations.
11002 It is useful to bind this variable with `let', but do not set it globally.
11003 If the value is a coding system, it is used for decoding on read operation.
11004 If not, an appropriate element is used from one of the coding system alists.
11005 There are three such tables: `file-coding-system-alist',
11006 `process-coding-system-alist', and `network-coding-system-alist'. */);
11007 Vcoding_system_for_read
= Qnil
;
11009 DEFVAR_LISP ("coding-system-for-write", Vcoding_system_for_write
,
11010 doc
: /* Specify the coding system for write operations.
11011 Programs bind this variable with `let', but you should not set it globally.
11012 If the value is a coding system, it is used for encoding of output,
11013 when writing it to a file and when sending it to a file or subprocess.
11015 If this does not specify a coding system, an appropriate element
11016 is used from one of the coding system alists.
11017 There are three such tables: `file-coding-system-alist',
11018 `process-coding-system-alist', and `network-coding-system-alist'.
11019 For output to files, if the above procedure does not specify a coding system,
11020 the value of `buffer-file-coding-system' is used. */);
11021 Vcoding_system_for_write
= Qnil
;
11023 DEFVAR_LISP ("last-coding-system-used", Vlast_coding_system_used
,
11025 Coding system used in the latest file or process I/O. */);
11026 Vlast_coding_system_used
= Qnil
;
11028 DEFVAR_LISP ("last-code-conversion-error", Vlast_code_conversion_error
,
11030 Error status of the last code conversion.
11032 When an error was detected in the last code conversion, this variable
11033 is set to one of the following symbols.
11034 `insufficient-source'
11038 `insufficient-memory'
11039 When no error was detected, the value doesn't change. So, to check
11040 the error status of a code conversion by this variable, you must
11041 explicitly set this variable to nil before performing code
11043 Vlast_code_conversion_error
= Qnil
;
11045 DEFVAR_BOOL ("inhibit-eol-conversion", inhibit_eol_conversion
,
11047 *Non-nil means always inhibit code conversion of end-of-line format.
11048 See info node `Coding Systems' and info node `Text and Binary' concerning
11049 such conversion. */);
11050 inhibit_eol_conversion
= 0;
11052 DEFVAR_BOOL ("inherit-process-coding-system", inherit_process_coding_system
,
11054 Non-nil means process buffer inherits coding system of process output.
11055 Bind it to t if the process output is to be treated as if it were a file
11056 read from some filesystem. */);
11057 inherit_process_coding_system
= 0;
11059 DEFVAR_LISP ("file-coding-system-alist", Vfile_coding_system_alist
,
11061 Alist to decide a coding system to use for a file I/O operation.
11062 The format is ((PATTERN . VAL) ...),
11063 where PATTERN is a regular expression matching a file name,
11064 VAL is a coding system, a cons of coding systems, or a function symbol.
11065 If VAL is a coding system, it is used for both decoding and encoding
11067 If VAL is a cons of coding systems, the car part is used for decoding,
11068 and the cdr part is used for encoding.
11069 If VAL is a function symbol, the function must return a coding system
11070 or a cons of coding systems which are used as above. The function is
11071 called with an argument that is a list of the arguments with which
11072 `find-operation-coding-system' was called. If the function can't decide
11073 a coding system, it can return `undecided' so that the normal
11074 code-detection is performed.
11076 See also the function `find-operation-coding-system'
11077 and the variable `auto-coding-alist'. */);
11078 Vfile_coding_system_alist
= Qnil
;
11080 DEFVAR_LISP ("process-coding-system-alist", Vprocess_coding_system_alist
,
11082 Alist to decide a coding system to use for a process I/O operation.
11083 The format is ((PATTERN . VAL) ...),
11084 where PATTERN is a regular expression matching a program name,
11085 VAL is a coding system, a cons of coding systems, or a function symbol.
11086 If VAL is a coding system, it is used for both decoding what received
11087 from the program and encoding what sent to the program.
11088 If VAL is a cons of coding systems, the car part is used for decoding,
11089 and the cdr part is used for encoding.
11090 If VAL is a function symbol, the function must return a coding system
11091 or a cons of coding systems which are used as above.
11093 See also the function `find-operation-coding-system'. */);
11094 Vprocess_coding_system_alist
= Qnil
;
11096 DEFVAR_LISP ("network-coding-system-alist", Vnetwork_coding_system_alist
,
11098 Alist to decide a coding system to use for a network I/O operation.
11099 The format is ((PATTERN . VAL) ...),
11100 where PATTERN is a regular expression matching a network service name
11101 or is a port number to connect to,
11102 VAL is a coding system, a cons of coding systems, or a function symbol.
11103 If VAL is a coding system, it is used for both decoding what received
11104 from the network stream and encoding what sent to the network stream.
11105 If VAL is a cons of coding systems, the car part is used for decoding,
11106 and the cdr part is used for encoding.
11107 If VAL is a function symbol, the function must return a coding system
11108 or a cons of coding systems which are used as above.
11110 See also the function `find-operation-coding-system'. */);
11111 Vnetwork_coding_system_alist
= Qnil
;
11113 DEFVAR_LISP ("locale-coding-system", Vlocale_coding_system
,
11114 doc
: /* Coding system to use with system messages.
11115 Also used for decoding keyboard input on X Window system. */);
11116 Vlocale_coding_system
= Qnil
;
11118 /* The eol mnemonics are reset in startup.el system-dependently. */
11119 DEFVAR_LISP ("eol-mnemonic-unix", eol_mnemonic_unix
,
11121 *String displayed in mode line for UNIX-like (LF) end-of-line format. */);
11122 eol_mnemonic_unix
= build_pure_c_string (":");
11124 DEFVAR_LISP ("eol-mnemonic-dos", eol_mnemonic_dos
,
11126 *String displayed in mode line for DOS-like (CRLF) end-of-line format. */);
11127 eol_mnemonic_dos
= build_pure_c_string ("\\");
11129 DEFVAR_LISP ("eol-mnemonic-mac", eol_mnemonic_mac
,
11131 *String displayed in mode line for MAC-like (CR) end-of-line format. */);
11132 eol_mnemonic_mac
= build_pure_c_string ("/");
11134 DEFVAR_LISP ("eol-mnemonic-undecided", eol_mnemonic_undecided
,
11136 *String displayed in mode line when end-of-line format is not yet determined. */);
11137 eol_mnemonic_undecided
= build_pure_c_string (":");
11139 DEFVAR_LISP ("enable-character-translation", Venable_character_translation
,
11141 *Non-nil enables character translation while encoding and decoding. */);
11142 Venable_character_translation
= Qt
;
11144 DEFVAR_LISP ("standard-translation-table-for-decode",
11145 Vstandard_translation_table_for_decode
,
11146 doc
: /* Table for translating characters while decoding. */);
11147 Vstandard_translation_table_for_decode
= Qnil
;
11149 DEFVAR_LISP ("standard-translation-table-for-encode",
11150 Vstandard_translation_table_for_encode
,
11151 doc
: /* Table for translating characters while encoding. */);
11152 Vstandard_translation_table_for_encode
= Qnil
;
11154 DEFVAR_LISP ("charset-revision-table", Vcharset_revision_table
,
11155 doc
: /* Alist of charsets vs revision numbers.
11156 While encoding, if a charset (car part of an element) is found,
11157 designate it with the escape sequence identifying revision (cdr part
11158 of the element). */);
11159 Vcharset_revision_table
= Qnil
;
11161 DEFVAR_LISP ("default-process-coding-system",
11162 Vdefault_process_coding_system
,
11163 doc
: /* Cons of coding systems used for process I/O by default.
11164 The car part is used for decoding a process output,
11165 the cdr part is used for encoding a text to be sent to a process. */);
11166 Vdefault_process_coding_system
= Qnil
;
11168 DEFVAR_LISP ("latin-extra-code-table", Vlatin_extra_code_table
,
11170 Table of extra Latin codes in the range 128..159 (inclusive).
11171 This is a vector of length 256.
11172 If Nth element is non-nil, the existence of code N in a file
11173 \(or output of subprocess) doesn't prevent it to be detected as
11174 a coding system of ISO 2022 variant which has a flag
11175 `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file
11176 or reading output of a subprocess.
11177 Only 128th through 159th elements have a meaning. */);
11178 Vlatin_extra_code_table
= Fmake_vector (make_number (256), Qnil
);
11180 DEFVAR_LISP ("select-safe-coding-system-function",
11181 Vselect_safe_coding_system_function
,
11183 Function to call to select safe coding system for encoding a text.
11185 If set, this function is called to force a user to select a proper
11186 coding system which can encode the text in the case that a default
11187 coding system used in each operation can't encode the text. The
11188 function should take care that the buffer is not modified while
11189 the coding system is being selected.
11191 The default value is `select-safe-coding-system' (which see). */);
11192 Vselect_safe_coding_system_function
= Qnil
;
11194 DEFVAR_BOOL ("coding-system-require-warning",
11195 coding_system_require_warning
,
11196 doc
: /* Internal use only.
11197 If non-nil, on writing a file, `select-safe-coding-system-function' is
11198 called even if `coding-system-for-write' is non-nil. The command
11199 `universal-coding-system-argument' binds this variable to t temporarily. */);
11200 coding_system_require_warning
= 0;
11203 DEFVAR_BOOL ("inhibit-iso-escape-detection",
11204 inhibit_iso_escape_detection
,
11206 If non-nil, Emacs ignores ISO-2022 escape sequences during code detection.
11208 When Emacs reads text, it tries to detect how the text is encoded.
11209 This code detection is sensitive to escape sequences. If Emacs sees
11210 a valid ISO-2022 escape sequence, it assumes the text is encoded in one
11211 of the ISO2022 encodings, and decodes text by the corresponding coding
11212 system (e.g. `iso-2022-7bit').
11214 However, there may be a case that you want to read escape sequences in
11215 a file as is. In such a case, you can set this variable to non-nil.
11216 Then the code detection will ignore any escape sequences, and no text is
11217 detected as encoded in some ISO-2022 encoding. The result is that all
11218 escape sequences become visible in a buffer.
11220 The default value is nil, and it is strongly recommended not to change
11221 it. That is because many Emacs Lisp source files that contain
11222 non-ASCII characters are encoded by the coding system `iso-2022-7bit'
11223 in Emacs's distribution, and they won't be decoded correctly on
11224 reading if you suppress escape sequence detection.
11226 The other way to read escape sequences in a file without decoding is
11227 to explicitly specify some coding system that doesn't use ISO-2022
11228 escape sequence (e.g., `latin-1') on reading by \\[universal-coding-system-argument]. */);
11229 inhibit_iso_escape_detection
= 0;
11231 DEFVAR_BOOL ("inhibit-null-byte-detection",
11232 inhibit_null_byte_detection
,
11233 doc
: /* If non-nil, Emacs ignores null bytes on code detection.
11234 By default, Emacs treats it as binary data, and does not attempt to
11235 decode it. The effect is as if you specified `no-conversion' for
11238 Set this to non-nil when a regular text happens to include null bytes.
11239 Examples are Index nodes of Info files and null-byte delimited output
11240 from GNU Find and GNU Grep. Emacs will then ignore the null bytes and
11241 decode text as usual. */);
11242 inhibit_null_byte_detection
= 0;
11244 DEFVAR_BOOL ("disable-ascii-optimization", disable_ascii_optimization
,
11245 doc
: /* If non-nil, Emacs does not optimize code decoder for ASCII files.
11246 Internal use only. Removed after the experimental optimizer gets stable. */);
11247 disable_ascii_optimization
= 0;
11249 DEFVAR_LISP ("translation-table-for-input", Vtranslation_table_for_input
,
11250 doc
: /* Char table for translating self-inserting characters.
11251 This is applied to the result of input methods, not their input.
11252 See also `keyboard-translate-table'.
11254 Use of this variable for character code unification was rendered
11255 obsolete in Emacs 23.1 and later, since Unicode is now the basis of
11256 internal character representation. */);
11257 Vtranslation_table_for_input
= Qnil
;
11260 Lisp_Object args
[coding_arg_undecided_max
];
11261 Lisp_Object plist
[16];
11264 for (i
= 0; i
< coding_arg_undecided_max
; i
++)
11267 plist
[0] = intern_c_string (":name");
11268 plist
[1] = args
[coding_arg_name
] = Qno_conversion
;
11269 plist
[2] = intern_c_string (":mnemonic");
11270 plist
[3] = args
[coding_arg_mnemonic
] = make_number ('=');
11271 plist
[4] = intern_c_string (":coding-type");
11272 plist
[5] = args
[coding_arg_coding_type
] = Qraw_text
;
11273 plist
[6] = intern_c_string (":ascii-compatible-p");
11274 plist
[7] = args
[coding_arg_ascii_compatible_p
] = Qt
;
11275 plist
[8] = intern_c_string (":default-char");
11276 plist
[9] = args
[coding_arg_default_char
] = make_number (0);
11277 plist
[10] = intern_c_string (":for-unibyte");
11278 plist
[11] = args
[coding_arg_for_unibyte
] = Qt
;
11279 plist
[12] = intern_c_string (":docstring");
11280 plist
[13] = build_pure_c_string ("Do no conversion.\n\
11282 When you visit a file with this coding, the file is read into a\n\
11283 unibyte buffer as is, thus each byte of a file is treated as a\n\
11285 plist
[14] = intern_c_string (":eol-type");
11286 plist
[15] = args
[coding_arg_eol_type
] = Qunix
;
11287 args
[coding_arg_plist
] = Flist (16, plist
);
11288 Fdefine_coding_system_internal (coding_arg_max
, args
);
11290 plist
[1] = args
[coding_arg_name
] = Qundecided
;
11291 plist
[3] = args
[coding_arg_mnemonic
] = make_number ('-');
11292 plist
[5] = args
[coding_arg_coding_type
] = Qundecided
;
11293 /* This is already set.
11294 plist[7] = args[coding_arg_ascii_compatible_p] = Qt; */
11295 plist
[8] = intern_c_string (":charset-list");
11296 plist
[9] = args
[coding_arg_charset_list
] = Fcons (Qascii
, Qnil
);
11297 plist
[11] = args
[coding_arg_for_unibyte
] = Qnil
;
11298 plist
[13] = build_pure_c_string ("No conversion on encoding, automatic conversion on decoding.");
11299 plist
[15] = args
[coding_arg_eol_type
] = Qnil
;
11300 args
[coding_arg_plist
] = Flist (16, plist
);
11301 args
[coding_arg_undecided_inhibit_null_byte_detection
] = make_number (0);
11302 args
[coding_arg_undecided_inhibit_iso_escape_detection
] = make_number (0);
11303 Fdefine_coding_system_internal (coding_arg_undecided_max
, args
);
11306 setup_coding_system (Qno_conversion
, &safe_terminal_coding
);
11311 for (i
= 0; i
< coding_category_max
; i
++)
11312 Fset (AREF (Vcoding_category_table
, i
), Qno_conversion
);
11314 #if defined (DOS_NT)
11315 system_eol_type
= Qdos
;
11317 system_eol_type
= Qunix
;
11319 staticpro (&system_eol_type
);
11323 emacs_strerror (int error_number
)
11327 synchronize_system_messages_locale ();
11328 str
= strerror (error_number
);
11330 if (! NILP (Vlocale_coding_system
))
11332 Lisp_Object dec
= code_convert_string_norecord (build_string (str
),
11333 Vlocale_coding_system
,
11335 str
= SSDATA (dec
);