1 /* Coding system handler (conversion, detection, etc).
2 Copyright (C) 2001, 2002, 2003, 2004, 2005,
3 2006, 2007 Free Software Foundation, Inc.
4 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
6 National Institute of Advanced Industrial Science and Technology (AIST)
7 Registration Number H14PRO021
9 National Institute of Advanced Industrial Science and Technology (AIST)
10 Registration Number H13PRO009
12 This file is part of GNU Emacs.
14 GNU Emacs is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3, or (at your option)
19 GNU Emacs is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with GNU Emacs; see the file COPYING. If not, write to
26 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
27 Boston, MA 02110-1301, USA. */
29 /*** TABLE OF CONTENTS ***
33 2. Emacs' internal format (emacs-utf-8) handlers
36 5. Charset-base coding systems handlers
37 6. emacs-mule (old Emacs' internal format) handlers
39 8. Shift-JIS and BIG5 handlers
41 10. C library functions
42 11. Emacs Lisp library functions
47 /*** 0. General comments ***
52 A coding system is an object for an encoding mechanism that contains
53 information about how to convert byte sequences to character
54 sequences and vice versa. When we say "decode", it means converting
55 a byte sequence of a specific coding system into a character
56 sequence that is represented by Emacs' internal coding system
57 `emacs-utf-8', and when we say "encode", it means converting a
58 character sequence of emacs-utf-8 to a byte sequence of a specific
61 In Emacs Lisp, a coding system is represented by a Lisp symbol. In
62 C level, a coding system is represented by a vector of attributes
63 stored in the hash table Vcharset_hash_table. The conversion from
64 coding system symbol to attributes vector is done by looking up
65 Vcharset_hash_table by the symbol.
67 Coding systems are classified into the following types depending on
68 the encoding mechanism. Here's a brief description of the types.
74 o Charset-base coding system
76 A coding system defined by one or more (coded) character sets.
77 Decoding and encoding are done by a code converter defined for each
80 o Old Emacs internal format (emacs-mule)
82 The coding system adopted by old versions of Emacs (20 and 21).
84 o ISO2022-base coding system
86 The most famous coding system for multiple character sets. X's
87 Compound Text, various EUCs (Extended Unix Code), and coding systems
88 used in the Internet communication such as ISO-2022-JP are all
91 o SJIS (or Shift-JIS or MS-Kanji-Code)
93 A coding system to encode character sets: ASCII, JISX0201, and
94 JISX0208. Widely used for PC's in Japan. Details are described in
99 A coding system to encode character sets: ASCII and Big5. Widely
100 used for Chinese (mainly in Taiwan and Hong Kong). Details are
101 described in section 8. In this file, when we write "big5" (all
102 lowercase), we mean the coding system, and when we write "Big5"
103 (capitalized), we mean the character set.
107 If a user wants to decode/encode text encoded in a coding system
108 not listed above, he can supply a decoder and an encoder for it in
109 CCL (Code Conversion Language) programs. Emacs executes the CCL
110 program while decoding/encoding.
114 A coding system for text containing raw eight-bit data. Emacs
115 treats each byte of source text as a character (except for
116 end-of-line conversion).
120 Like raw text, but don't do end-of-line conversion.
125 How text end-of-line is encoded depends on operating system. For
126 instance, Unix's format is just one byte of LF (line-feed) code,
127 whereas DOS's format is two-byte sequence of `carriage-return' and
128 `line-feed' codes. MacOS's format is usually one byte of
131 Since text character encoding and end-of-line encoding are
132 independent, any coding system described above can take any format
133 of end-of-line (except for no-conversion).
137 Before using a coding system for code conversion (i.e. decoding and
138 encoding), we setup a structure of type `struct coding_system'.
139 This structure keeps various information about a specific code
140 conversion (e.g. the location of source and destination data).
147 /*** GENERAL NOTES on `detect_coding_XXX ()' functions ***
149 These functions check if a byte sequence specified as a source in
150 CODING conforms to the format of XXX, and update the members of
153 Return 1 if the byte sequence conforms to XXX, otherwise return 0.
155 Below is the template of these functions. */
159 detect_coding_XXX (coding
, detect_info
)
160 struct coding_system
*coding
;
161 struct coding_detection_info
*detect_info
;
163 const unsigned char *src
= coding
->source
;
164 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
165 int multibytep
= coding
->src_multibyte
;
166 int consumed_chars
= 0;
172 /* Get one byte from the source. If the souce is exausted, jump
173 to no_more_source:. */
176 if (! __C_conforms_to_XXX___ (c
))
178 if (! __C_strongly_suggests_XXX__ (c
))
179 found
= CATEGORY_MASK_XXX
;
181 /* The byte sequence is invalid for XXX. */
182 detect_info
->rejected
|= CATEGORY_MASK_XXX
;
186 /* The source exausted successfully. */
187 detect_info
->found
|= found
;
192 /*** GENERAL NOTES on `decode_coding_XXX ()' functions ***
194 These functions decode a byte sequence specified as a source by
195 CODING. The resulting multibyte text goes to a place pointed to by
196 CODING->charbuf, the length of which should not exceed
197 CODING->charbuf_size;
199 These functions set the information of original and decoded texts in
200 CODING->consumed, CODING->consumed_char, and CODING->charbuf_used.
201 They also set CODING->result to one of CODING_RESULT_XXX indicating
202 how the decoding is finished.
204 Below is the template of these functions. */
208 decode_coding_XXXX (coding
)
209 struct coding_system
*coding
;
211 const unsigned char *src
= coding
->source
+ coding
->consumed
;
212 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
213 /* SRC_BASE remembers the start position in source in each loop.
214 The loop will be exited when there's not enough source code, or
215 when there's no room in CHARBUF for a decoded character. */
216 const unsigned char *src_base
;
217 /* A buffer to produce decoded characters. */
218 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
219 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
220 int multibytep
= coding
->src_multibyte
;
225 if (charbuf
< charbuf_end
)
226 /* No more room to produce a decoded character. */
233 if (src_base
< src_end
234 && coding
->mode
& CODING_MODE_LAST_BLOCK
)
235 /* If the source ends by partial bytes to construct a character,
236 treat them as eight-bit raw data. */
237 while (src_base
< src_end
&& charbuf
< charbuf_end
)
238 *charbuf
++ = *src_base
++;
239 /* Remember how many bytes and characters we consumed. If the
240 source is multibyte, the bytes and chars are not identical. */
241 coding
->consumed
= coding
->consumed_char
= src_base
- coding
->source
;
242 /* Remember how many characters we produced. */
243 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
247 /*** GENERAL NOTES on `encode_coding_XXX ()' functions ***
249 These functions encode SRC_BYTES length text at SOURCE of Emacs'
250 internal multibyte format by CODING. The resulting byte sequence
251 goes to a place pointed to by DESTINATION, the length of which
252 should not exceed DST_BYTES.
254 These functions set the information of original and encoded texts in
255 the members produced, produced_char, consumed, and consumed_char of
256 the structure *CODING. They also set the member result to one of
257 CODING_RESULT_XXX indicating how the encoding finished.
259 DST_BYTES zero means that source area and destination area are
260 overlapped, which means that we can produce a encoded text until it
261 reaches at the head of not-yet-encoded source text.
263 Below is a template of these functions. */
266 encode_coding_XXX (coding
)
267 struct coding_system
*coding
;
269 int multibytep
= coding
->dst_multibyte
;
270 int *charbuf
= coding
->charbuf
;
271 int *charbuf_end
= charbuf
->charbuf
+ coding
->charbuf_used
;
272 unsigned char *dst
= coding
->destination
+ coding
->produced
;
273 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
274 unsigned char *adjusted_dst_end
= dst_end
- _MAX_BYTES_PRODUCED_IN_LOOP_
;
275 int produced_chars
= 0;
277 for (; charbuf
< charbuf_end
&& dst
< adjusted_dst_end
; charbuf
++)
280 /* Encode C into DST, and increment DST. */
282 label_no_more_destination
:
283 /* How many chars and bytes we produced. */
284 coding
->produced_char
+= produced_chars
;
285 coding
->produced
= dst
- coding
->destination
;
290 /*** 1. Preamble ***/
297 #include "character.h"
300 #include "composite.h"
304 #include "termhooks.h"
306 Lisp_Object Vcoding_system_hash_table
;
308 Lisp_Object Qcoding_system
, Qcoding_aliases
, Qeol_type
;
309 Lisp_Object Qunix
, Qdos
;
310 extern Lisp_Object Qmac
; /* frame.c */
311 Lisp_Object Qbuffer_file_coding_system
;
312 Lisp_Object Qpost_read_conversion
, Qpre_write_conversion
;
313 Lisp_Object Qdefault_char
;
314 Lisp_Object Qno_conversion
, Qundecided
;
315 Lisp_Object Qcharset
, Qiso_2022
, Qutf_8
, Qutf_16
, Qshift_jis
, Qbig5
;
316 Lisp_Object Qbig
, Qlittle
;
317 Lisp_Object Qcoding_system_history
;
318 Lisp_Object Qvalid_codes
;
319 Lisp_Object QCcategory
, QCmnemonic
, QCdefalut_char
;
320 Lisp_Object QCdecode_translation_table
, QCencode_translation_table
;
321 Lisp_Object QCpost_read_conversion
, QCpre_write_conversion
;
322 Lisp_Object QCascii_compatible_p
;
324 extern Lisp_Object Qinsert_file_contents
, Qwrite_region
;
325 Lisp_Object Qcall_process
, Qcall_process_region
;
326 Lisp_Object Qstart_process
, Qopen_network_stream
;
327 Lisp_Object Qtarget_idx
;
329 Lisp_Object Qinsufficient_source
, Qinconsistent_eol
, Qinvalid_source
;
330 Lisp_Object Qinterrupted
, Qinsufficient_memory
;
332 extern Lisp_Object Qcompletion_ignore_case
;
334 /* If a symbol has this property, evaluate the value to define the
335 symbol as a coding system. */
336 static Lisp_Object Qcoding_system_define_form
;
338 int coding_system_require_warning
;
340 Lisp_Object Vselect_safe_coding_system_function
;
342 /* Mnemonic string for each format of end-of-line. */
343 Lisp_Object eol_mnemonic_unix
, eol_mnemonic_dos
, eol_mnemonic_mac
;
344 /* Mnemonic string to indicate format of end-of-line is not yet
346 Lisp_Object eol_mnemonic_undecided
;
348 /* Format of end-of-line decided by system. This is Qunix on
349 Unix and Mac, Qdos on DOS/Windows.
350 This has an effect only for external encoding (i.e. for output to
351 file and process), not for in-buffer or Lisp string encoding. */
352 static Lisp_Object system_eol_type
;
356 Lisp_Object Vcoding_system_list
, Vcoding_system_alist
;
358 Lisp_Object Qcoding_system_p
, Qcoding_system_error
;
360 /* Coding system emacs-mule and raw-text are for converting only
361 end-of-line format. */
362 Lisp_Object Qemacs_mule
, Qraw_text
;
363 Lisp_Object Qutf_8_emacs
;
365 /* Coding-systems are handed between Emacs Lisp programs and C internal
366 routines by the following three variables. */
367 /* Coding-system for reading files and receiving data from process. */
368 Lisp_Object Vcoding_system_for_read
;
369 /* Coding-system for writing files and sending data to process. */
370 Lisp_Object Vcoding_system_for_write
;
371 /* Coding-system actually used in the latest I/O. */
372 Lisp_Object Vlast_coding_system_used
;
373 /* Set to non-nil when an error is detected while code conversion. */
374 Lisp_Object Vlast_code_conversion_error
;
375 /* A vector of length 256 which contains information about special
376 Latin codes (especially for dealing with Microsoft codes). */
377 Lisp_Object Vlatin_extra_code_table
;
379 /* Flag to inhibit code conversion of end-of-line format. */
380 int inhibit_eol_conversion
;
382 /* Flag to inhibit ISO2022 escape sequence detection. */
383 int inhibit_iso_escape_detection
;
385 /* Flag to make buffer-file-coding-system inherit from process-coding. */
386 int inherit_process_coding_system
;
388 /* Coding system to be used to encode text for terminal display when
389 terminal coding system is nil. */
390 struct coding_system safe_terminal_coding
;
392 Lisp_Object Vfile_coding_system_alist
;
393 Lisp_Object Vprocess_coding_system_alist
;
394 Lisp_Object Vnetwork_coding_system_alist
;
396 Lisp_Object Vlocale_coding_system
;
400 /* Flag to tell if we look up translation table on character code
402 Lisp_Object Venable_character_translation
;
403 /* Standard translation table to look up on decoding (reading). */
404 Lisp_Object Vstandard_translation_table_for_decode
;
405 /* Standard translation table to look up on encoding (writing). */
406 Lisp_Object Vstandard_translation_table_for_encode
;
408 Lisp_Object Qtranslation_table
;
409 Lisp_Object Qtranslation_table_id
;
410 Lisp_Object Qtranslation_table_for_decode
;
411 Lisp_Object Qtranslation_table_for_encode
;
413 /* Alist of charsets vs revision number. */
414 static Lisp_Object Vcharset_revision_table
;
416 /* Default coding systems used for process I/O. */
417 Lisp_Object Vdefault_process_coding_system
;
419 /* Char table for translating Quail and self-inserting input. */
420 Lisp_Object Vtranslation_table_for_input
;
422 /* Two special coding systems. */
423 Lisp_Object Vsjis_coding_system
;
424 Lisp_Object Vbig5_coding_system
;
426 /* ISO2022 section */
428 #define CODING_ISO_INITIAL(coding, reg) \
429 (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \
430 coding_attr_iso_initial), \
434 #define CODING_ISO_REQUEST(coding, charset_id) \
435 ((charset_id <= (coding)->max_charset_id \
436 ? (coding)->safe_charsets[charset_id] \
440 #define CODING_ISO_FLAGS(coding) \
441 ((coding)->spec.iso_2022.flags)
442 #define CODING_ISO_DESIGNATION(coding, reg) \
443 ((coding)->spec.iso_2022.current_designation[reg])
444 #define CODING_ISO_INVOCATION(coding, plane) \
445 ((coding)->spec.iso_2022.current_invocation[plane])
446 #define CODING_ISO_SINGLE_SHIFTING(coding) \
447 ((coding)->spec.iso_2022.single_shifting)
448 #define CODING_ISO_BOL(coding) \
449 ((coding)->spec.iso_2022.bol)
450 #define CODING_ISO_INVOKED_CHARSET(coding, plane) \
451 CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane)))
453 /* Control characters of ISO2022. */
454 /* code */ /* function */
455 #define ISO_CODE_LF 0x0A /* line-feed */
456 #define ISO_CODE_CR 0x0D /* carriage-return */
457 #define ISO_CODE_SO 0x0E /* shift-out */
458 #define ISO_CODE_SI 0x0F /* shift-in */
459 #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */
460 #define ISO_CODE_ESC 0x1B /* escape */
461 #define ISO_CODE_SS2 0x8E /* single-shift-2 */
462 #define ISO_CODE_SS3 0x8F /* single-shift-3 */
463 #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */
465 /* All code (1-byte) of ISO2022 is classified into one of the
467 enum iso_code_class_type
469 ISO_control_0
, /* Control codes in the range
470 0x00..0x1F and 0x7F, except for the
471 following 5 codes. */
472 ISO_shift_out
, /* ISO_CODE_SO (0x0E) */
473 ISO_shift_in
, /* ISO_CODE_SI (0x0F) */
474 ISO_single_shift_2_7
, /* ISO_CODE_SS2_7 (0x19) */
475 ISO_escape
, /* ISO_CODE_SO (0x1B) */
476 ISO_control_1
, /* Control codes in the range
477 0x80..0x9F, except for the
478 following 3 codes. */
479 ISO_single_shift_2
, /* ISO_CODE_SS2 (0x8E) */
480 ISO_single_shift_3
, /* ISO_CODE_SS3 (0x8F) */
481 ISO_control_sequence_introducer
, /* ISO_CODE_CSI (0x9B) */
482 ISO_0x20_or_0x7F
, /* Codes of the values 0x20 or 0x7F. */
483 ISO_graphic_plane_0
, /* Graphic codes in the range 0x21..0x7E. */
484 ISO_0xA0_or_0xFF
, /* Codes of the values 0xA0 or 0xFF. */
485 ISO_graphic_plane_1
/* Graphic codes in the range 0xA1..0xFE. */
488 /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the
489 `iso-flags' attribute of an iso2022 coding system. */
491 /* If set, produce long-form designation sequence (e.g. ESC $ ( A)
492 instead of the correct short-form sequence (e.g. ESC $ A). */
493 #define CODING_ISO_FLAG_LONG_FORM 0x0001
495 /* If set, reset graphic planes and registers at end-of-line to the
497 #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002
499 /* If set, reset graphic planes and registers before any control
500 characters to the initial state. */
501 #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004
503 /* If set, encode by 7-bit environment. */
504 #define CODING_ISO_FLAG_SEVEN_BITS 0x0008
506 /* If set, use locking-shift function. */
507 #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010
509 /* If set, use single-shift function. Overwrite
510 CODING_ISO_FLAG_LOCKING_SHIFT. */
511 #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020
513 /* If set, use designation escape sequence. */
514 #define CODING_ISO_FLAG_DESIGNATION 0x0040
516 /* If set, produce revision number sequence. */
517 #define CODING_ISO_FLAG_REVISION 0x0080
519 /* If set, produce ISO6429's direction specifying sequence. */
520 #define CODING_ISO_FLAG_DIRECTION 0x0100
522 /* If set, assume designation states are reset at beginning of line on
524 #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200
526 /* If set, designation sequence should be placed at beginning of line
528 #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400
530 /* If set, do not encode unsafe charactes on output. */
531 #define CODING_ISO_FLAG_SAFE 0x0800
533 /* If set, extra latin codes (128..159) are accepted as a valid code
535 #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000
537 #define CODING_ISO_FLAG_COMPOSITION 0x2000
539 #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000
541 #define CODING_ISO_FLAG_USE_ROMAN 0x8000
543 #define CODING_ISO_FLAG_USE_OLDJIS 0x10000
545 #define CODING_ISO_FLAG_FULL_SUPPORT 0x100000
547 /* A character to be produced on output if encoding of the original
548 character is prohibited by CODING_ISO_FLAG_SAFE. */
549 #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?'
553 #define CODING_UTF_16_BOM(coding) \
554 ((coding)->spec.utf_16.bom)
556 #define CODING_UTF_16_ENDIAN(coding) \
557 ((coding)->spec.utf_16.endian)
559 #define CODING_UTF_16_SURROGATE(coding) \
560 ((coding)->spec.utf_16.surrogate)
564 #define CODING_CCL_DECODER(coding) \
565 AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder)
566 #define CODING_CCL_ENCODER(coding) \
567 AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder)
568 #define CODING_CCL_VALIDS(coding) \
569 (SDATA (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids)))
571 /* Index for each coding category in `coding_categories' */
575 coding_category_iso_7
,
576 coding_category_iso_7_tight
,
577 coding_category_iso_8_1
,
578 coding_category_iso_8_2
,
579 coding_category_iso_7_else
,
580 coding_category_iso_8_else
,
581 coding_category_utf_8
,
582 coding_category_utf_16_auto
,
583 coding_category_utf_16_be
,
584 coding_category_utf_16_le
,
585 coding_category_utf_16_be_nosig
,
586 coding_category_utf_16_le_nosig
,
587 coding_category_charset
,
588 coding_category_sjis
,
589 coding_category_big5
,
591 coding_category_emacs_mule
,
592 /* All above are targets of code detection. */
593 coding_category_raw_text
,
594 coding_category_undecided
,
598 /* Definitions of flag bits used in detect_coding_XXXX. */
599 #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7)
600 #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight)
601 #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1)
602 #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2)
603 #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else)
604 #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else)
605 #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8)
606 #define CATEGORY_MASK_UTF_16_AUTO (1 << coding_category_utf_16_auto)
607 #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be)
608 #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le)
609 #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig)
610 #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig)
611 #define CATEGORY_MASK_CHARSET (1 << coding_category_charset)
612 #define CATEGORY_MASK_SJIS (1 << coding_category_sjis)
613 #define CATEGORY_MASK_BIG5 (1 << coding_category_big5)
614 #define CATEGORY_MASK_CCL (1 << coding_category_ccl)
615 #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule)
616 #define CATEGORY_MASK_RAW_TEXT (1 << coding_category_raw_text)
618 /* This value is returned if detect_coding_mask () find nothing other
619 than ASCII characters. */
620 #define CATEGORY_MASK_ANY \
621 (CATEGORY_MASK_ISO_7 \
622 | CATEGORY_MASK_ISO_7_TIGHT \
623 | CATEGORY_MASK_ISO_8_1 \
624 | CATEGORY_MASK_ISO_8_2 \
625 | CATEGORY_MASK_ISO_7_ELSE \
626 | CATEGORY_MASK_ISO_8_ELSE \
627 | CATEGORY_MASK_UTF_8 \
628 | CATEGORY_MASK_UTF_16_BE \
629 | CATEGORY_MASK_UTF_16_LE \
630 | CATEGORY_MASK_UTF_16_BE_NOSIG \
631 | CATEGORY_MASK_UTF_16_LE_NOSIG \
632 | CATEGORY_MASK_CHARSET \
633 | CATEGORY_MASK_SJIS \
634 | CATEGORY_MASK_BIG5 \
635 | CATEGORY_MASK_CCL \
636 | CATEGORY_MASK_EMACS_MULE)
639 #define CATEGORY_MASK_ISO_7BIT \
640 (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT)
642 #define CATEGORY_MASK_ISO_8BIT \
643 (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2)
645 #define CATEGORY_MASK_ISO_ELSE \
646 (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE)
648 #define CATEGORY_MASK_ISO_ESCAPE \
649 (CATEGORY_MASK_ISO_7 \
650 | CATEGORY_MASK_ISO_7_TIGHT \
651 | CATEGORY_MASK_ISO_7_ELSE \
652 | CATEGORY_MASK_ISO_8_ELSE)
654 #define CATEGORY_MASK_ISO \
655 ( CATEGORY_MASK_ISO_7BIT \
656 | CATEGORY_MASK_ISO_8BIT \
657 | CATEGORY_MASK_ISO_ELSE)
659 #define CATEGORY_MASK_UTF_16 \
660 (CATEGORY_MASK_UTF_16_BE \
661 | CATEGORY_MASK_UTF_16_LE \
662 | CATEGORY_MASK_UTF_16_BE_NOSIG \
663 | CATEGORY_MASK_UTF_16_LE_NOSIG)
666 /* List of symbols `coding-category-xxx' ordered by priority. This
667 variable is exposed to Emacs Lisp. */
668 static Lisp_Object Vcoding_category_list
;
670 /* Table of coding categories (Lisp symbols). This variable is for
672 static Lisp_Object Vcoding_category_table
;
674 /* Table of coding-categories ordered by priority. */
675 static enum coding_category coding_priorities
[coding_category_max
];
677 /* Nth element is a coding context for the coding system bound to the
678 Nth coding category. */
679 static struct coding_system coding_categories
[coding_category_max
];
681 /*** Commonly used macros and functions ***/
684 #define min(a, b) ((a) < (b) ? (a) : (b))
687 #define max(a, b) ((a) > (b) ? (a) : (b))
690 #define CODING_GET_INFO(coding, attrs, charset_list) \
692 (attrs) = CODING_ID_ATTRS ((coding)->id); \
693 (charset_list) = CODING_ATTR_CHARSET_LIST (attrs); \
697 /* Safely get one byte from the source text pointed by SRC which ends
698 at SRC_END, and set C to that byte. If there are not enough bytes
699 in the source, it jumps to `no_more_source'. If multibytep is
700 nonzero, and a multibyte character is found at SRC, set C to the
701 negative value of the character code. The caller should declare
702 and set these variables appropriately in advance:
703 src, src_end, multibytep */
705 #define ONE_MORE_BYTE(c) \
707 if (src == src_end) \
709 if (src_base < src) \
710 record_conversion_result \
711 (coding, CODING_RESULT_INSUFFICIENT_SRC); \
712 goto no_more_source; \
715 if (multibytep && (c & 0x80)) \
717 if ((c & 0xFE) == 0xC0) \
718 c = ((c & 1) << 6) | *src++; \
722 c = - string_char (src, &src, NULL); \
723 record_conversion_result \
724 (coding, CODING_RESULT_INVALID_SRC); \
731 #define ONE_MORE_BYTE_NO_CHECK(c) \
734 if (multibytep && (c & 0x80)) \
736 if ((c & 0xFE) == 0xC0) \
737 c = ((c & 1) << 6) | *src++; \
741 c = - string_char (src, &src, NULL); \
742 record_conversion_result \
743 (coding, CODING_RESULT_INVALID_SRC); \
750 /* Store a byte C in the place pointed by DST and increment DST to the
751 next free point, and increment PRODUCED_CHARS. The caller should
752 assure that C is 0..127, and declare and set the variable `dst'
753 appropriately in advance.
757 #define EMIT_ONE_ASCII_BYTE(c) \
764 /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */
766 #define EMIT_TWO_ASCII_BYTES(c1, c2) \
768 produced_chars += 2; \
769 *dst++ = (c1), *dst++ = (c2); \
773 /* Store a byte C in the place pointed by DST and increment DST to the
774 next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is
775 nonzero, store in an appropriate multibyte from. The caller should
776 declare and set the variables `dst' and `multibytep' appropriately
779 #define EMIT_ONE_BYTE(c) \
786 ch = BYTE8_TO_CHAR (ch); \
787 CHAR_STRING_ADVANCE (ch, dst); \
794 /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */
796 #define EMIT_TWO_BYTES(c1, c2) \
798 produced_chars += 2; \
805 ch = BYTE8_TO_CHAR (ch); \
806 CHAR_STRING_ADVANCE (ch, dst); \
809 ch = BYTE8_TO_CHAR (ch); \
810 CHAR_STRING_ADVANCE (ch, dst); \
820 #define EMIT_THREE_BYTES(c1, c2, c3) \
822 EMIT_ONE_BYTE (c1); \
823 EMIT_TWO_BYTES (c2, c3); \
827 #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \
829 EMIT_TWO_BYTES (c1, c2); \
830 EMIT_TWO_BYTES (c3, c4); \
834 /* Prototypes for static functions. */
835 static void record_conversion_result
P_ ((struct coding_system
*coding
,
836 enum coding_result_code result
));
837 static int detect_coding_utf_8
P_ ((struct coding_system
*,
838 struct coding_detection_info
*info
));
839 static void decode_coding_utf_8
P_ ((struct coding_system
*));
840 static int encode_coding_utf_8
P_ ((struct coding_system
*));
842 static int detect_coding_utf_16
P_ ((struct coding_system
*,
843 struct coding_detection_info
*info
));
844 static void decode_coding_utf_16
P_ ((struct coding_system
*));
845 static int encode_coding_utf_16
P_ ((struct coding_system
*));
847 static int detect_coding_iso_2022
P_ ((struct coding_system
*,
848 struct coding_detection_info
*info
));
849 static void decode_coding_iso_2022
P_ ((struct coding_system
*));
850 static int encode_coding_iso_2022
P_ ((struct coding_system
*));
852 static int detect_coding_emacs_mule
P_ ((struct coding_system
*,
853 struct coding_detection_info
*info
));
854 static void decode_coding_emacs_mule
P_ ((struct coding_system
*));
855 static int encode_coding_emacs_mule
P_ ((struct coding_system
*));
857 static int detect_coding_sjis
P_ ((struct coding_system
*,
858 struct coding_detection_info
*info
));
859 static void decode_coding_sjis
P_ ((struct coding_system
*));
860 static int encode_coding_sjis
P_ ((struct coding_system
*));
862 static int detect_coding_big5
P_ ((struct coding_system
*,
863 struct coding_detection_info
*info
));
864 static void decode_coding_big5
P_ ((struct coding_system
*));
865 static int encode_coding_big5
P_ ((struct coding_system
*));
867 static int detect_coding_ccl
P_ ((struct coding_system
*,
868 struct coding_detection_info
*info
));
869 static void decode_coding_ccl
P_ ((struct coding_system
*));
870 static int encode_coding_ccl
P_ ((struct coding_system
*));
872 static void decode_coding_raw_text
P_ ((struct coding_system
*));
873 static int encode_coding_raw_text
P_ ((struct coding_system
*));
875 static void coding_set_source
P_ ((struct coding_system
*));
876 static void coding_set_destination
P_ ((struct coding_system
*));
877 static void coding_alloc_by_realloc
P_ ((struct coding_system
*, EMACS_INT
));
878 static void coding_alloc_by_making_gap
P_ ((struct coding_system
*,
879 EMACS_INT
, EMACS_INT
));
880 static unsigned char *alloc_destination
P_ ((struct coding_system
*,
881 EMACS_INT
, unsigned char *));
882 static void setup_iso_safe_charsets
P_ ((Lisp_Object
));
883 static unsigned char *encode_designation_at_bol
P_ ((struct coding_system
*,
886 static int detect_eol
P_ ((const unsigned char *,
887 EMACS_INT
, enum coding_category
));
888 static Lisp_Object adjust_coding_eol_type
P_ ((struct coding_system
*, int));
889 static void decode_eol
P_ ((struct coding_system
*));
890 static Lisp_Object get_translation_table
P_ ((Lisp_Object
, int, int *));
891 static Lisp_Object get_translation
P_ ((Lisp_Object
, int *, int *,
893 static int produce_chars
P_ ((struct coding_system
*, Lisp_Object
, int));
894 static INLINE
void produce_composition
P_ ((struct coding_system
*, int *,
896 static INLINE
void produce_charset
P_ ((struct coding_system
*, int *,
898 static void produce_annotation
P_ ((struct coding_system
*, EMACS_INT
));
899 static int decode_coding
P_ ((struct coding_system
*));
900 static INLINE
int *handle_composition_annotation
P_ ((EMACS_INT
, EMACS_INT
,
901 struct coding_system
*,
902 int *, EMACS_INT
*));
903 static INLINE
int *handle_charset_annotation
P_ ((EMACS_INT
, EMACS_INT
,
904 struct coding_system
*,
905 int *, EMACS_INT
*));
906 static void consume_chars
P_ ((struct coding_system
*, Lisp_Object
, int));
907 static int encode_coding
P_ ((struct coding_system
*));
908 static Lisp_Object make_conversion_work_buffer
P_ ((int));
909 static Lisp_Object code_conversion_restore
P_ ((Lisp_Object
));
910 static INLINE
int char_encodable_p
P_ ((int, Lisp_Object
));
911 static Lisp_Object make_subsidiaries
P_ ((Lisp_Object
));
914 record_conversion_result (struct coding_system
*coding
,
915 enum coding_result_code result
)
917 coding
->result
= result
;
920 case CODING_RESULT_INSUFFICIENT_SRC
:
921 Vlast_code_conversion_error
= Qinsufficient_source
;
923 case CODING_RESULT_INCONSISTENT_EOL
:
924 Vlast_code_conversion_error
= Qinconsistent_eol
;
926 case CODING_RESULT_INVALID_SRC
:
927 Vlast_code_conversion_error
= Qinvalid_source
;
929 case CODING_RESULT_INTERRUPT
:
930 Vlast_code_conversion_error
= Qinterrupted
;
932 case CODING_RESULT_INSUFFICIENT_MEM
:
933 Vlast_code_conversion_error
= Qinsufficient_memory
;
936 Vlast_code_conversion_error
= intern ("Unknown error");
940 #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \
942 charset_map_loaded = 0; \
943 c = DECODE_CHAR (charset, code); \
944 if (charset_map_loaded) \
946 const unsigned char *orig = coding->source; \
949 coding_set_source (coding); \
950 offset = coding->source - orig; \
952 src_base += offset; \
958 #define ASSURE_DESTINATION(bytes) \
960 if (dst + (bytes) >= dst_end) \
962 int more_bytes = charbuf_end - charbuf + (bytes); \
964 dst = alloc_destination (coding, more_bytes, dst); \
965 dst_end = coding->destination + coding->dst_bytes; \
972 coding_set_source (coding
)
973 struct coding_system
*coding
;
975 if (BUFFERP (coding
->src_object
))
977 struct buffer
*buf
= XBUFFER (coding
->src_object
);
979 if (coding
->src_pos
< 0)
980 coding
->source
= BUF_GAP_END_ADDR (buf
) + coding
->src_pos_byte
;
982 coding
->source
= BUF_BYTE_ADDRESS (buf
, coding
->src_pos_byte
);
984 else if (STRINGP (coding
->src_object
))
986 coding
->source
= SDATA (coding
->src_object
) + coding
->src_pos_byte
;
989 /* Otherwise, the source is C string and is never relocated
990 automatically. Thus we don't have to update anything. */
995 coding_set_destination (coding
)
996 struct coding_system
*coding
;
998 if (BUFFERP (coding
->dst_object
))
1000 if (coding
->src_pos
< 0)
1002 coding
->destination
= BEG_ADDR
+ coding
->dst_pos_byte
- 1;
1003 coding
->dst_bytes
= (GAP_END_ADDR
1004 - (coding
->src_bytes
- coding
->consumed
)
1005 - coding
->destination
);
1009 /* We are sure that coding->dst_pos_byte is before the gap
1011 coding
->destination
= (BUF_BEG_ADDR (XBUFFER (coding
->dst_object
))
1012 + coding
->dst_pos_byte
- 1);
1013 coding
->dst_bytes
= (BUF_GAP_END_ADDR (XBUFFER (coding
->dst_object
))
1014 - coding
->destination
);
1018 /* Otherwise, the destination is C string and is never relocated
1019 automatically. Thus we don't have to update anything. */
1025 coding_alloc_by_realloc (coding
, bytes
)
1026 struct coding_system
*coding
;
1029 coding
->destination
= (unsigned char *) xrealloc (coding
->destination
,
1030 coding
->dst_bytes
+ bytes
);
1031 coding
->dst_bytes
+= bytes
;
1035 coding_alloc_by_making_gap (coding
, offset
, bytes
)
1036 struct coding_system
*coding
;
1037 EMACS_INT offset
, bytes
;
1039 if (BUFFERP (coding
->dst_object
)
1040 && EQ (coding
->src_object
, coding
->dst_object
))
1042 EMACS_INT add
= offset
+ (coding
->src_bytes
- coding
->consumed
);
1044 GPT
+= offset
, GPT_BYTE
+= offset
;
1045 GAP_SIZE
-= add
; ZV
+= add
; Z
+= add
; ZV_BYTE
+= add
; Z_BYTE
+= add
;
1047 GAP_SIZE
+= add
; ZV
-= add
; Z
-= add
; ZV_BYTE
-= add
; Z_BYTE
-= add
;
1048 GPT
-= offset
, GPT_BYTE
-= offset
;
1052 Lisp_Object this_buffer
;
1054 this_buffer
= Fcurrent_buffer ();
1055 set_buffer_internal (XBUFFER (coding
->dst_object
));
1057 set_buffer_internal (XBUFFER (this_buffer
));
1062 static unsigned char *
1063 alloc_destination (coding
, nbytes
, dst
)
1064 struct coding_system
*coding
;
1068 EMACS_INT offset
= dst
- coding
->destination
;
1070 if (BUFFERP (coding
->dst_object
))
1071 coding_alloc_by_making_gap (coding
, offset
, nbytes
);
1073 coding_alloc_by_realloc (coding
, nbytes
);
1074 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
1075 coding_set_destination (coding
);
1076 dst
= coding
->destination
+ offset
;
1080 /** Macros for annotations. */
1082 /* Maximum length of annotation data (sum of annotations for
1083 composition and charset). */
1084 #define MAX_ANNOTATION_LENGTH (4 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 + 4)
1086 /* An annotation data is stored in the array coding->charbuf in this
1088 [ -LENGTH ANNOTATION_MASK NCHARS ... ]
1089 LENGTH is the number of elements in the annotation.
1090 ANNOTATION_MASK is one of CODING_ANNOTATE_XXX_MASK.
1091 NCHARS is the number of characters in the text annotated.
1093 The format of the following elements depend on ANNOTATION_MASK.
1095 In the case of CODING_ANNOTATE_COMPOSITION_MASK, these elements
1097 ... METHOD [ COMPOSITION-COMPONENTS ... ]
1098 METHOD is one of enum composition_method.
1099 Optionnal COMPOSITION-COMPONENTS are characters and composition
1102 In the case of CODING_ANNOTATE_CHARSET_MASK, one element CHARSET-ID
1105 #define ADD_ANNOTATION_DATA(buf, len, mask, nchars) \
1107 *(buf)++ = -(len); \
1108 *(buf)++ = (mask); \
1109 *(buf)++ = (nchars); \
1110 coding->annotated = 1; \
1113 #define ADD_COMPOSITION_DATA(buf, nchars, method) \
1115 ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_COMPOSITION_MASK, nchars); \
1120 #define ADD_CHARSET_DATA(buf, nchars, id) \
1122 ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_CHARSET_MASK, nchars); \
1127 /*** 2. Emacs' internal format (emacs-utf-8) ***/
1134 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1135 Check if a text is encoded in UTF-8. If it is, return 1, else
1138 #define UTF_8_1_OCTET_P(c) ((c) < 0x80)
1139 #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80)
1140 #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0)
1141 #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0)
1142 #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0)
1143 #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8)
1146 detect_coding_utf_8 (coding
, detect_info
)
1147 struct coding_system
*coding
;
1148 struct coding_detection_info
*detect_info
;
1150 const unsigned char *src
= coding
->source
, *src_base
;
1151 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1152 int multibytep
= coding
->src_multibyte
;
1153 int consumed_chars
= 0;
1156 detect_info
->checked
|= CATEGORY_MASK_UTF_8
;
1157 /* A coding system of this category is always ASCII compatible. */
1158 src
+= coding
->head_ascii
;
1162 int c
, c1
, c2
, c3
, c4
;
1166 if (c
< 0 || UTF_8_1_OCTET_P (c
))
1169 if (c1
< 0 || ! UTF_8_EXTRA_OCTET_P (c1
))
1171 if (UTF_8_2_OCTET_LEADING_P (c
))
1173 found
= CATEGORY_MASK_UTF_8
;
1177 if (c2
< 0 || ! UTF_8_EXTRA_OCTET_P (c2
))
1179 if (UTF_8_3_OCTET_LEADING_P (c
))
1181 found
= CATEGORY_MASK_UTF_8
;
1185 if (c3
< 0 || ! UTF_8_EXTRA_OCTET_P (c3
))
1187 if (UTF_8_4_OCTET_LEADING_P (c
))
1189 found
= CATEGORY_MASK_UTF_8
;
1193 if (c4
< 0 || ! UTF_8_EXTRA_OCTET_P (c4
))
1195 if (UTF_8_5_OCTET_LEADING_P (c
))
1197 found
= CATEGORY_MASK_UTF_8
;
1202 detect_info
->rejected
|= CATEGORY_MASK_UTF_8
;
1206 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
1208 detect_info
->rejected
|= CATEGORY_MASK_UTF_8
;
1211 detect_info
->found
|= found
;
1217 decode_coding_utf_8 (coding
)
1218 struct coding_system
*coding
;
1220 const unsigned char *src
= coding
->source
+ coding
->consumed
;
1221 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1222 const unsigned char *src_base
;
1223 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
1224 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
1225 int consumed_chars
= 0, consumed_chars_base
;
1226 int multibytep
= coding
->src_multibyte
;
1227 Lisp_Object attr
, charset_list
;
1229 CODING_GET_INFO (coding
, attr
, charset_list
);
1233 int c
, c1
, c2
, c3
, c4
, c5
;
1236 consumed_chars_base
= consumed_chars
;
1238 if (charbuf
>= charbuf_end
)
1246 else if (UTF_8_1_OCTET_P(c1
))
1253 if (c2
< 0 || ! UTF_8_EXTRA_OCTET_P (c2
))
1255 if (UTF_8_2_OCTET_LEADING_P (c1
))
1257 c
= ((c1
& 0x1F) << 6) | (c2
& 0x3F);
1258 /* Reject overlong sequences here and below. Encoders
1259 producing them are incorrect, they can be misleading,
1260 and they mess up read/write invariance. */
1267 if (c3
< 0 || ! UTF_8_EXTRA_OCTET_P (c3
))
1269 if (UTF_8_3_OCTET_LEADING_P (c1
))
1271 c
= (((c1
& 0xF) << 12)
1272 | ((c2
& 0x3F) << 6) | (c3
& 0x3F));
1274 || (c
>= 0xd800 && c
< 0xe000)) /* surrogates (invalid) */
1280 if (c4
< 0 || ! UTF_8_EXTRA_OCTET_P (c4
))
1282 if (UTF_8_4_OCTET_LEADING_P (c1
))
1284 c
= (((c1
& 0x7) << 18) | ((c2
& 0x3F) << 12)
1285 | ((c3
& 0x3F) << 6) | (c4
& 0x3F));
1292 if (c5
< 0 || ! UTF_8_EXTRA_OCTET_P (c5
))
1294 if (UTF_8_5_OCTET_LEADING_P (c1
))
1296 c
= (((c1
& 0x3) << 24) | ((c2
& 0x3F) << 18)
1297 | ((c3
& 0x3F) << 12) | ((c4
& 0x3F) << 6)
1299 if ((c
> MAX_CHAR
) || (c
< 0x200000))
1314 consumed_chars
= consumed_chars_base
;
1316 *charbuf
++ = ASCII_BYTE_P (c
) ? c
: BYTE8_TO_CHAR (c
);
1321 coding
->consumed_char
+= consumed_chars_base
;
1322 coding
->consumed
= src_base
- coding
->source
;
1323 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
1328 encode_coding_utf_8 (coding
)
1329 struct coding_system
*coding
;
1331 int multibytep
= coding
->dst_multibyte
;
1332 int *charbuf
= coding
->charbuf
;
1333 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
1334 unsigned char *dst
= coding
->destination
+ coding
->produced
;
1335 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
1336 int produced_chars
= 0;
1341 int safe_room
= MAX_MULTIBYTE_LENGTH
* 2;
1343 while (charbuf
< charbuf_end
)
1345 unsigned char str
[MAX_MULTIBYTE_LENGTH
], *p
, *pend
= str
;
1347 ASSURE_DESTINATION (safe_room
);
1349 if (CHAR_BYTE8_P (c
))
1351 c
= CHAR_TO_BYTE8 (c
);
1356 CHAR_STRING_ADVANCE (c
, pend
);
1357 for (p
= str
; p
< pend
; p
++)
1364 int safe_room
= MAX_MULTIBYTE_LENGTH
;
1366 while (charbuf
< charbuf_end
)
1368 ASSURE_DESTINATION (safe_room
);
1370 if (CHAR_BYTE8_P (c
))
1371 *dst
++ = CHAR_TO_BYTE8 (c
);
1373 dst
+= CHAR_STRING (c
, dst
);
1377 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
1378 coding
->produced_char
+= produced_chars
;
1379 coding
->produced
= dst
- coding
->destination
;
1384 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1385 Check if a text is encoded in one of UTF-16 based coding systems.
1386 If it is, return 1, else return 0. */
1388 #define UTF_16_HIGH_SURROGATE_P(val) \
1389 (((val) & 0xFC00) == 0xD800)
1391 #define UTF_16_LOW_SURROGATE_P(val) \
1392 (((val) & 0xFC00) == 0xDC00)
1394 #define UTF_16_INVALID_P(val) \
1395 (((val) == 0xFFFE) \
1396 || ((val) == 0xFFFF) \
1397 || UTF_16_LOW_SURROGATE_P (val))
1401 detect_coding_utf_16 (coding
, detect_info
)
1402 struct coding_system
*coding
;
1403 struct coding_detection_info
*detect_info
;
1405 const unsigned char *src
= coding
->source
, *src_base
= src
;
1406 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1407 int multibytep
= coding
->src_multibyte
;
1408 int consumed_chars
= 0;
1411 detect_info
->checked
|= CATEGORY_MASK_UTF_16
;
1412 if (coding
->mode
& CODING_MODE_LAST_BLOCK
1413 && (coding
->src_chars
& 1))
1415 detect_info
->rejected
|= CATEGORY_MASK_UTF_16
;
1421 if ((c1
== 0xFF) && (c2
== 0xFE))
1423 detect_info
->found
|= (CATEGORY_MASK_UTF_16_LE
1424 | CATEGORY_MASK_UTF_16_AUTO
);
1425 detect_info
->rejected
|= (CATEGORY_MASK_UTF_16_BE
1426 | CATEGORY_MASK_UTF_16_BE_NOSIG
1427 | CATEGORY_MASK_UTF_16_LE_NOSIG
);
1429 else if ((c1
== 0xFE) && (c2
== 0xFF))
1431 detect_info
->found
|= (CATEGORY_MASK_UTF_16_BE
1432 | CATEGORY_MASK_UTF_16_AUTO
);
1433 detect_info
->rejected
|= (CATEGORY_MASK_UTF_16_LE
1434 | CATEGORY_MASK_UTF_16_BE_NOSIG
1435 | CATEGORY_MASK_UTF_16_LE_NOSIG
);
1437 else if (c1
>= 0 && c2
>= 0)
1439 detect_info
->rejected
1440 |= (CATEGORY_MASK_UTF_16_BE
| CATEGORY_MASK_UTF_16_LE
);
1447 decode_coding_utf_16 (coding
)
1448 struct coding_system
*coding
;
1450 const unsigned char *src
= coding
->source
+ coding
->consumed
;
1451 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1452 const unsigned char *src_base
;
1453 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
1454 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
1455 int consumed_chars
= 0, consumed_chars_base
;
1456 int multibytep
= coding
->src_multibyte
;
1457 enum utf_16_bom_type bom
= CODING_UTF_16_BOM (coding
);
1458 enum utf_16_endian_type endian
= CODING_UTF_16_ENDIAN (coding
);
1459 int surrogate
= CODING_UTF_16_SURROGATE (coding
);
1460 Lisp_Object attr
, charset_list
;
1462 CODING_GET_INFO (coding
, attr
, charset_list
);
1464 if (bom
== utf_16_with_bom
)
1473 if (endian
== utf_16_big_endian
1474 ? c
!= 0xFEFF : c
!= 0xFFFE)
1476 /* The first two bytes are not BOM. Treat them as bytes
1477 for a normal character. */
1481 CODING_UTF_16_BOM (coding
) = utf_16_without_bom
;
1483 else if (bom
== utf_16_detect_bom
)
1485 /* We have already tried to detect BOM and failed in
1487 CODING_UTF_16_BOM (coding
) = utf_16_without_bom
;
1495 consumed_chars_base
= consumed_chars
;
1497 if (charbuf
+ 2 >= charbuf_end
)
1509 *charbuf
++ = ASCII_BYTE_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
1513 c
= (endian
== utf_16_big_endian
1514 ? ((c1
<< 8) | c2
) : ((c2
<< 8) | c1
));
1517 if (! UTF_16_LOW_SURROGATE_P (c
))
1519 if (endian
== utf_16_big_endian
)
1520 c1
= surrogate
>> 8, c2
= surrogate
& 0xFF;
1522 c1
= surrogate
& 0xFF, c2
= surrogate
>> 8;
1526 if (UTF_16_HIGH_SURROGATE_P (c
))
1527 CODING_UTF_16_SURROGATE (coding
) = surrogate
= c
;
1533 c
= ((surrogate
- 0xD800) << 10) | (c
- 0xDC00);
1534 CODING_UTF_16_SURROGATE (coding
) = surrogate
= 0;
1535 *charbuf
++ = 0x10000 + c
;
1540 if (UTF_16_HIGH_SURROGATE_P (c
))
1541 CODING_UTF_16_SURROGATE (coding
) = surrogate
= c
;
1548 coding
->consumed_char
+= consumed_chars_base
;
1549 coding
->consumed
= src_base
- coding
->source
;
1550 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
1554 encode_coding_utf_16 (coding
)
1555 struct coding_system
*coding
;
1557 int multibytep
= coding
->dst_multibyte
;
1558 int *charbuf
= coding
->charbuf
;
1559 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
1560 unsigned char *dst
= coding
->destination
+ coding
->produced
;
1561 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
1563 enum utf_16_bom_type bom
= CODING_UTF_16_BOM (coding
);
1564 int big_endian
= CODING_UTF_16_ENDIAN (coding
) == utf_16_big_endian
;
1565 int produced_chars
= 0;
1566 Lisp_Object attrs
, charset_list
;
1569 CODING_GET_INFO (coding
, attrs
, charset_list
);
1571 if (bom
!= utf_16_without_bom
)
1573 ASSURE_DESTINATION (safe_room
);
1575 EMIT_TWO_BYTES (0xFE, 0xFF);
1577 EMIT_TWO_BYTES (0xFF, 0xFE);
1578 CODING_UTF_16_BOM (coding
) = utf_16_without_bom
;
1581 while (charbuf
< charbuf_end
)
1583 ASSURE_DESTINATION (safe_room
);
1585 if (c
>= MAX_UNICODE_CHAR
)
1586 c
= coding
->default_char
;
1591 EMIT_TWO_BYTES (c
>> 8, c
& 0xFF);
1593 EMIT_TWO_BYTES (c
& 0xFF, c
>> 8);
1600 c1
= (c
>> 10) + 0xD800;
1601 c2
= (c
& 0x3FF) + 0xDC00;
1603 EMIT_FOUR_BYTES (c1
>> 8, c1
& 0xFF, c2
>> 8, c2
& 0xFF);
1605 EMIT_FOUR_BYTES (c1
& 0xFF, c1
>> 8, c2
& 0xFF, c2
>> 8);
1608 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
1609 coding
->produced
= dst
- coding
->destination
;
1610 coding
->produced_char
+= produced_chars
;
1615 /*** 6. Old Emacs' internal format (emacs-mule) ***/
1617 /* Emacs' internal format for representation of multiple character
1618 sets is a kind of multi-byte encoding, i.e. characters are
1619 represented by variable-length sequences of one-byte codes.
1621 ASCII characters and control characters (e.g. `tab', `newline') are
1622 represented by one-byte sequences which are their ASCII codes, in
1623 the range 0x00 through 0x7F.
1625 8-bit characters of the range 0x80..0x9F are represented by
1626 two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit
1629 8-bit characters of the range 0xA0..0xFF are represented by
1630 one-byte sequences which are their 8-bit code.
1632 The other characters are represented by a sequence of `base
1633 leading-code', optional `extended leading-code', and one or two
1634 `position-code's. The length of the sequence is determined by the
1635 base leading-code. Leading-code takes the range 0x81 through 0x9D,
1636 whereas extended leading-code and position-code take the range 0xA0
1637 through 0xFF. See `charset.h' for more details about leading-code
1640 --- CODE RANGE of Emacs' internal format ---
1644 eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF
1645 eight-bit-graphic 0xA0..0xBF
1646 ELSE 0x81..0x9D + [0xA0..0xFF]+
1647 ---------------------------------------------
1649 As this is the internal character representation, the format is
1650 usually not used externally (i.e. in a file or in a data sent to a
1651 process). But, it is possible to have a text externally in this
1652 format (i.e. by encoding by the coding system `emacs-mule').
1654 In that case, a sequence of one-byte codes has a slightly different
1657 At first, all characters in eight-bit-control are represented by
1658 one-byte sequences which are their 8-bit code.
1660 Next, character composition data are represented by the byte
1661 sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ...,
1663 METHOD is 0xF0 plus one of composition method (enum
1664 composition_method),
1666 BYTES is 0xA0 plus a byte length of this composition data,
1668 CHARS is 0x20 plus a number of characters composed by this
1671 COMPONENTs are characters of multibye form or composition
1672 rules encoded by two-byte of ASCII codes.
1674 In addition, for backward compatibility, the following formats are
1675 also recognized as composition data on decoding.
1678 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ
1681 MSEQ is a multibyte form but in these special format:
1682 ASCII: 0xA0 ASCII_CODE+0x80,
1683 other: LEADING_CODE+0x20 FOLLOWING-BYTE ...,
1684 RULE is a one byte code of the range 0xA0..0xF0 that
1685 represents a composition rule.
1688 char emacs_mule_bytes
[256];
1691 emacs_mule_char (coding
, src
, nbytes
, nchars
, id
)
1692 struct coding_system
*coding
;
1693 const unsigned char *src
;
1694 int *nbytes
, *nchars
, *id
;
1696 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1697 const unsigned char *src_base
= src
;
1698 int multibytep
= coding
->src_multibyte
;
1699 struct charset
*charset
;
1702 int consumed_chars
= 0;
1708 charset
= emacs_mule_charset
[0];
1714 /* Old style component character of a compostion. */
1724 switch (emacs_mule_bytes
[c
])
1727 if (! (charset
= emacs_mule_charset
[c
]))
1736 if (c
== EMACS_MULE_LEADING_CODE_PRIVATE_11
1737 || c
== EMACS_MULE_LEADING_CODE_PRIVATE_12
)
1740 if (c
< 0xA0 || ! (charset
= emacs_mule_charset
[c
]))
1749 if (! (charset
= emacs_mule_charset
[c
]))
1754 code
= (c
& 0x7F) << 8;
1764 if (c
< 0 || ! (charset
= emacs_mule_charset
[c
]))
1769 code
= (c
& 0x7F) << 8;
1778 charset
= CHARSET_FROM_ID (ASCII_BYTE_P (code
)
1779 ? charset_ascii
: charset_eight_bit
);
1785 c
= DECODE_CHAR (charset
, code
);
1789 *nbytes
= src
- src_base
;
1790 *nchars
= consumed_chars
;
1803 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
1804 Check if a text is encoded in `emacs-mule'. If it is, return 1,
1808 detect_coding_emacs_mule (coding
, detect_info
)
1809 struct coding_system
*coding
;
1810 struct coding_detection_info
*detect_info
;
1812 const unsigned char *src
= coding
->source
, *src_base
;
1813 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
1814 int multibytep
= coding
->src_multibyte
;
1815 int consumed_chars
= 0;
1819 detect_info
->checked
|= CATEGORY_MASK_EMACS_MULE
;
1820 /* A coding system of this category is always ASCII compatible. */
1821 src
+= coding
->head_ascii
;
1831 /* Perhaps the start of composite character. We simple skip
1832 it because analyzing it is too heavy for detecting. But,
1833 at least, we check that the composite character
1834 constitues of more than 4 bytes. */
1835 const unsigned char *src_base
;
1845 if (src
- src_base
<= 4)
1847 found
= CATEGORY_MASK_EMACS_MULE
;
1855 && (c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
))
1860 int more_bytes
= emacs_mule_bytes
[*src_base
] - 1;
1862 while (more_bytes
> 0)
1867 src
--; /* Unread the last byte. */
1872 if (more_bytes
!= 0)
1874 found
= CATEGORY_MASK_EMACS_MULE
;
1877 detect_info
->rejected
|= CATEGORY_MASK_EMACS_MULE
;
1881 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
1883 detect_info
->rejected
|= CATEGORY_MASK_EMACS_MULE
;
1886 detect_info
->found
|= found
;
1891 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
1893 /* Decode a character represented as a component of composition
1894 sequence of Emacs 20/21 style at SRC. Set C to that character and
1895 update SRC to the head of next character (or an encoded composition
1896 rule). If SRC doesn't points a composition component, set C to -1.
1897 If SRC points an invalid byte sequence, global exit by a return
1900 #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \
1904 int nbytes, nchars; \
1906 if (src == src_end) \
1908 c = emacs_mule_char (coding, src, &nbytes, &nchars, NULL);\
1913 goto invalid_code; \
1917 consumed_chars += nchars; \
1922 /* Decode a composition rule represented as a component of composition
1923 sequence of Emacs 20 style at SRC. Store the decoded rule in *BUF,
1924 and increment BUF. If SRC points an invalid byte sequence, set C
1927 #define DECODE_EMACS_MULE_COMPOSITION_RULE_20(buf) \
1929 int c, gref, nref; \
1931 if (src >= src_end) \
1932 goto invalid_code; \
1933 ONE_MORE_BYTE_NO_CHECK (c); \
1935 if (c < 0 || c >= 81) \
1936 goto invalid_code; \
1938 gref = c / 9, nref = c % 9; \
1939 *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \
1943 /* Decode a composition rule represented as a component of composition
1944 sequence of Emacs 21 style at SRC. Store the decoded rule in *BUF,
1945 and increment BUF. If SRC points an invalid byte sequence, set C
1948 #define DECODE_EMACS_MULE_COMPOSITION_RULE_21(buf) \
1952 if (src + 1>= src_end) \
1953 goto invalid_code; \
1954 ONE_MORE_BYTE_NO_CHECK (gref); \
1956 ONE_MORE_BYTE_NO_CHECK (nref); \
1958 if (gref < 0 || gref >= 81 \
1959 || nref < 0 || nref >= 81) \
1960 goto invalid_code; \
1961 *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \
1965 #define DECODE_EMACS_MULE_21_COMPOSITION(c) \
1967 /* Emacs 21 style format. The first three bytes at SRC are \
1968 (METHOD - 0xF2), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \
1969 the byte length of this composition information, CHARS is the \
1970 number of characters composed by this composition. */ \
1971 enum composition_method method = c - 0xF2; \
1972 int *charbuf_base = charbuf; \
1973 int consumed_chars_limit; \
1974 int nbytes, nchars; \
1976 ONE_MORE_BYTE (c); \
1978 goto invalid_code; \
1979 nbytes = c - 0xA0; \
1981 goto invalid_code; \
1982 ONE_MORE_BYTE (c); \
1984 goto invalid_code; \
1985 nchars = c - 0xA0; \
1986 ADD_COMPOSITION_DATA (charbuf, nchars, method); \
1987 consumed_chars_limit = consumed_chars_base + nbytes; \
1988 if (method != COMPOSITION_RELATIVE) \
1991 while (consumed_chars < consumed_chars_limit) \
1993 if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \
1994 DECODE_EMACS_MULE_COMPOSITION_RULE_21 (charbuf); \
1996 DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \
1999 if (consumed_chars < consumed_chars_limit) \
2000 goto invalid_code; \
2001 charbuf_base[0] -= i; \
2006 #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \
2008 /* Emacs 20 style format for relative composition. */ \
2009 /* Store multibyte form of characters to be composed. */ \
2010 enum composition_method method = COMPOSITION_RELATIVE; \
2011 int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \
2012 int *buf = components; \
2016 ONE_MORE_BYTE (c); /* skip 0x80 */ \
2017 for (i = 0; *src >= 0xA0 && i < MAX_COMPOSITION_COMPONENTS; i++) \
2018 DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \
2020 goto invalid_code; \
2021 ADD_COMPOSITION_DATA (charbuf, i, method); \
2022 for (j = 0; j < i; j++) \
2023 *charbuf++ = components[j]; \
2027 #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \
2029 /* Emacs 20 style format for rule-base composition. */ \
2030 /* Store multibyte form of characters to be composed. */ \
2031 enum composition_method method = COMPOSITION_WITH_RULE; \
2032 int *charbuf_base = charbuf; \
2033 int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \
2034 int *buf = components; \
2037 DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \
2038 for (i = 1; i < MAX_COMPOSITION_COMPONENTS; i++) \
2042 DECODE_EMACS_MULE_COMPOSITION_RULE_20 (buf); \
2043 DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \
2045 if (i <= 1 || (buf - components) % 2 == 0) \
2046 goto invalid_code; \
2047 if (charbuf + i + (i / 2) + 1 >= charbuf_end) \
2048 goto no_more_source; \
2049 ADD_COMPOSITION_DATA (charbuf, i, method); \
2051 for (j = 0; j < i; j++) \
2052 *charbuf++ = components[j]; \
2053 charbuf_base[0] -= i; \
2054 for (j = 0; j < i; j += 2) \
2055 *charbuf++ = components[j]; \
2060 decode_coding_emacs_mule (coding
)
2061 struct coding_system
*coding
;
2063 const unsigned char *src
= coding
->source
+ coding
->consumed
;
2064 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
2065 const unsigned char *src_base
;
2066 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
2068 = coding
->charbuf
+ coding
->charbuf_size
- MAX_ANNOTATION_LENGTH
;
2069 int consumed_chars
= 0, consumed_chars_base
;
2070 int multibytep
= coding
->src_multibyte
;
2071 Lisp_Object attrs
, charset_list
;
2072 int char_offset
= coding
->produced_char
;
2073 int last_offset
= char_offset
;
2074 int last_id
= charset_ascii
;
2076 CODING_GET_INFO (coding
, attrs
, charset_list
);
2083 consumed_chars_base
= consumed_chars
;
2085 if (charbuf
>= charbuf_end
)
2104 if (c
- 0xF2 >= COMPOSITION_RELATIVE
2105 && c
- 0xF2 <= COMPOSITION_WITH_RULE_ALTCHARS
)
2106 DECODE_EMACS_MULE_21_COMPOSITION (c
);
2108 DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c
);
2110 DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c
);
2114 else if (c
< 0xA0 && emacs_mule_bytes
[c
] > 1)
2120 consumed_chars
= consumed_chars_base
;
2121 c
= emacs_mule_char (coding
, src
, &nbytes
, &nchars
, &id
);
2130 if (last_id
!= charset_ascii
)
2131 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
2133 last_offset
= char_offset
;
2137 consumed_chars
+= nchars
;
2146 consumed_chars
= consumed_chars_base
;
2148 *charbuf
++ = ASCII_BYTE_P (c
) ? c
: BYTE8_TO_CHAR (c
);
2154 if (last_id
!= charset_ascii
)
2155 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
2156 coding
->consumed_char
+= consumed_chars_base
;
2157 coding
->consumed
= src_base
- coding
->source
;
2158 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
2162 #define EMACS_MULE_LEADING_CODES(id, codes) \
2165 codes[0] = id, codes[1] = 0; \
2166 else if (id < 0xE0) \
2167 codes[0] = 0x9A, codes[1] = id; \
2168 else if (id < 0xF0) \
2169 codes[0] = 0x9B, codes[1] = id; \
2170 else if (id < 0xF5) \
2171 codes[0] = 0x9C, codes[1] = id; \
2173 codes[0] = 0x9D, codes[1] = id; \
2178 encode_coding_emacs_mule (coding
)
2179 struct coding_system
*coding
;
2181 int multibytep
= coding
->dst_multibyte
;
2182 int *charbuf
= coding
->charbuf
;
2183 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
2184 unsigned char *dst
= coding
->destination
+ coding
->produced
;
2185 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
2187 int produced_chars
= 0;
2188 Lisp_Object attrs
, charset_list
;
2190 int preferred_charset_id
= -1;
2192 CODING_GET_INFO (coding
, attrs
, charset_list
);
2193 if (! EQ (charset_list
, Vemacs_mule_charset_list
))
2195 CODING_ATTR_CHARSET_LIST (attrs
)
2196 = charset_list
= Vemacs_mule_charset_list
;
2199 while (charbuf
< charbuf_end
)
2201 ASSURE_DESTINATION (safe_room
);
2206 /* Handle an annotation. */
2209 case CODING_ANNOTATE_COMPOSITION_MASK
:
2210 /* Not yet implemented. */
2212 case CODING_ANNOTATE_CHARSET_MASK
:
2213 preferred_charset_id
= charbuf
[3];
2214 if (preferred_charset_id
>= 0
2215 && NILP (Fmemq (make_number (preferred_charset_id
),
2217 preferred_charset_id
= -1;
2226 if (ASCII_CHAR_P (c
))
2227 EMIT_ONE_ASCII_BYTE (c
);
2228 else if (CHAR_BYTE8_P (c
))
2230 c
= CHAR_TO_BYTE8 (c
);
2235 struct charset
*charset
;
2239 unsigned char leading_codes
[2];
2241 if (preferred_charset_id
>= 0)
2243 charset
= CHARSET_FROM_ID (preferred_charset_id
);
2244 if (! CHAR_CHARSET_P (c
, charset
))
2245 charset
= char_charset (c
, charset_list
, NULL
);
2248 charset
= char_charset (c
, charset_list
, &code
);
2251 c
= coding
->default_char
;
2252 if (ASCII_CHAR_P (c
))
2254 EMIT_ONE_ASCII_BYTE (c
);
2257 charset
= char_charset (c
, charset_list
, &code
);
2259 dimension
= CHARSET_DIMENSION (charset
);
2260 emacs_mule_id
= CHARSET_EMACS_MULE_ID (charset
);
2261 EMACS_MULE_LEADING_CODES (emacs_mule_id
, leading_codes
);
2262 EMIT_ONE_BYTE (leading_codes
[0]);
2263 if (leading_codes
[1])
2264 EMIT_ONE_BYTE (leading_codes
[1]);
2266 EMIT_ONE_BYTE (code
| 0x80);
2270 EMIT_ONE_BYTE (code
>> 8);
2271 EMIT_ONE_BYTE (code
& 0xFF);
2275 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
2276 coding
->produced_char
+= produced_chars
;
2277 coding
->produced
= dst
- coding
->destination
;
2282 /*** 7. ISO2022 handlers ***/
2284 /* The following note describes the coding system ISO2022 briefly.
2285 Since the intention of this note is to help understand the
2286 functions in this file, some parts are NOT ACCURATE or are OVERLY
2287 SIMPLIFIED. For thorough understanding, please refer to the
2288 original document of ISO2022. This is equivalent to the standard
2289 ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*).
2291 ISO2022 provides many mechanisms to encode several character sets
2292 in 7-bit and 8-bit environments. For 7-bit environments, all text
2293 is encoded using bytes less than 128. This may make the encoded
2294 text a little bit longer, but the text passes more easily through
2295 several types of gateway, some of which strip off the MSB (Most
2298 There are two kinds of character sets: control character sets and
2299 graphic character sets. The former contain control characters such
2300 as `newline' and `escape' to provide control functions (control
2301 functions are also provided by escape sequences). The latter
2302 contain graphic characters such as 'A' and '-'. Emacs recognizes
2303 two control character sets and many graphic character sets.
2305 Graphic character sets are classified into one of the following
2306 four classes, according to the number of bytes (DIMENSION) and
2307 number of characters in one dimension (CHARS) of the set:
2308 - DIMENSION1_CHARS94
2309 - DIMENSION1_CHARS96
2310 - DIMENSION2_CHARS94
2311 - DIMENSION2_CHARS96
2313 In addition, each character set is assigned an identification tag,
2314 unique for each set, called the "final character" (denoted as <F>
2315 hereafter). The <F> of each character set is decided by ECMA(*)
2316 when it is registered in ISO. The code range of <F> is 0x30..0x7F
2317 (0x30..0x3F are for private use only).
2319 Note (*): ECMA = European Computer Manufacturers Association
2321 Here are examples of graphic character sets [NAME(<F>)]:
2322 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
2323 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
2324 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
2325 o DIMENSION2_CHARS96 -- none for the moment
2327 A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR.
2328 C0 [0x00..0x1F] -- control character plane 0
2329 GL [0x20..0x7F] -- graphic character plane 0
2330 C1 [0x80..0x9F] -- control character plane 1
2331 GR [0xA0..0xFF] -- graphic character plane 1
2333 A control character set is directly designated and invoked to C0 or
2334 C1 by an escape sequence. The most common case is that:
2335 - ISO646's control character set is designated/invoked to C0, and
2336 - ISO6429's control character set is designated/invoked to C1,
2337 and usually these designations/invocations are omitted in encoded
2338 text. In a 7-bit environment, only C0 can be used, and a control
2339 character for C1 is encoded by an appropriate escape sequence to
2340 fit into the environment. All control characters for C1 are
2341 defined to have corresponding escape sequences.
2343 A graphic character set is at first designated to one of four
2344 graphic registers (G0 through G3), then these graphic registers are
2345 invoked to GL or GR. These designations and invocations can be
2346 done independently. The most common case is that G0 is invoked to
2347 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
2348 these invocations and designations are omitted in encoded text.
2349 In a 7-bit environment, only GL can be used.
2351 When a graphic character set of CHARS94 is invoked to GL, codes
2352 0x20 and 0x7F of the GL area work as control characters SPACE and
2353 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
2356 There are two ways of invocation: locking-shift and single-shift.
2357 With locking-shift, the invocation lasts until the next different
2358 invocation, whereas with single-shift, the invocation affects the
2359 following character only and doesn't affect the locking-shift
2360 state. Invocations are done by the following control characters or
2363 ----------------------------------------------------------------------
2364 abbrev function cntrl escape seq description
2365 ----------------------------------------------------------------------
2366 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
2367 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
2368 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
2369 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
2370 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
2371 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
2372 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
2373 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
2374 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
2375 ----------------------------------------------------------------------
2376 (*) These are not used by any known coding system.
2378 Control characters for these functions are defined by macros
2379 ISO_CODE_XXX in `coding.h'.
2381 Designations are done by the following escape sequences:
2382 ----------------------------------------------------------------------
2383 escape sequence description
2384 ----------------------------------------------------------------------
2385 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
2386 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
2387 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
2388 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
2389 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
2390 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
2391 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
2392 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
2393 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
2394 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
2395 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
2396 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
2397 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
2398 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
2399 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
2400 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
2401 ----------------------------------------------------------------------
2403 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
2404 of dimension 1, chars 94, and final character <F>, etc...
2406 Note (*): Although these designations are not allowed in ISO2022,
2407 Emacs accepts them on decoding, and produces them on encoding
2408 CHARS96 character sets in a coding system which is characterized as
2409 7-bit environment, non-locking-shift, and non-single-shift.
2411 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
2412 '(' must be omitted. We refer to this as "short-form" hereafter.
2414 Now you may notice that there are a lot of ways of encoding the
2415 same multilingual text in ISO2022. Actually, there exist many
2416 coding systems such as Compound Text (used in X11's inter client
2417 communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR
2418 (used in Korean Internet), EUC (Extended UNIX Code, used in Asian
2419 localized platforms), and all of these are variants of ISO2022.
2421 In addition to the above, Emacs handles two more kinds of escape
2422 sequences: ISO6429's direction specification and Emacs' private
2423 sequence for specifying character composition.
2425 ISO6429's direction specification takes the following form:
2426 o CSI ']' -- end of the current direction
2427 o CSI '0' ']' -- end of the current direction
2428 o CSI '1' ']' -- start of left-to-right text
2429 o CSI '2' ']' -- start of right-to-left text
2430 The control character CSI (0x9B: control sequence introducer) is
2431 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
2433 Character composition specification takes the following form:
2434 o ESC '0' -- start relative composition
2435 o ESC '1' -- end composition
2436 o ESC '2' -- start rule-base composition (*)
2437 o ESC '3' -- start relative composition with alternate chars (**)
2438 o ESC '4' -- start rule-base composition with alternate chars (**)
2439 Since these are not standard escape sequences of any ISO standard,
2440 the use of them with these meanings is restricted to Emacs only.
2442 (*) This form is used only in Emacs 20.7 and older versions,
2443 but newer versions can safely decode it.
2444 (**) This form is used only in Emacs 21.1 and newer versions,
2445 and older versions can't decode it.
2447 Here's a list of example usages of these composition escape
2448 sequences (categorized by `enum composition_method').
2450 COMPOSITION_RELATIVE:
2451 ESC 0 CHAR [ CHAR ] ESC 1
2452 COMPOSITION_WITH_RULE:
2453 ESC 2 CHAR [ RULE CHAR ] ESC 1
2454 COMPOSITION_WITH_ALTCHARS:
2455 ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1
2456 COMPOSITION_WITH_RULE_ALTCHARS:
2457 ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */
2459 enum iso_code_class_type iso_code_class
[256];
2461 #define SAFE_CHARSET_P(coding, id) \
2462 ((id) <= (coding)->max_charset_id \
2463 && (coding)->safe_charsets[id] >= 0)
2466 #define SHIFT_OUT_OK(category) \
2467 (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0)
2470 setup_iso_safe_charsets (attrs
)
2473 Lisp_Object charset_list
, safe_charsets
;
2474 Lisp_Object request
;
2475 Lisp_Object reg_usage
;
2478 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
2481 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
2482 if ((flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
2483 && ! EQ (charset_list
, Viso_2022_charset_list
))
2485 CODING_ATTR_CHARSET_LIST (attrs
)
2486 = charset_list
= Viso_2022_charset_list
;
2487 ASET (attrs
, coding_attr_safe_charsets
, Qnil
);
2490 if (STRINGP (AREF (attrs
, coding_attr_safe_charsets
)))
2494 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
2496 int id
= XINT (XCAR (tail
));
2497 if (max_charset_id
< id
)
2498 max_charset_id
= id
;
2501 safe_charsets
= Fmake_string (make_number (max_charset_id
+ 1),
2503 request
= AREF (attrs
, coding_attr_iso_request
);
2504 reg_usage
= AREF (attrs
, coding_attr_iso_usage
);
2505 reg94
= XINT (XCAR (reg_usage
));
2506 reg96
= XINT (XCDR (reg_usage
));
2508 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
2512 struct charset
*charset
;
2515 charset
= CHARSET_FROM_ID (XINT (id
));
2516 reg
= Fcdr (Fassq (id
, request
));
2518 SSET (safe_charsets
, XINT (id
), XINT (reg
));
2519 else if (charset
->iso_chars_96
)
2522 SSET (safe_charsets
, XINT (id
), reg96
);
2527 SSET (safe_charsets
, XINT (id
), reg94
);
2530 ASET (attrs
, coding_attr_safe_charsets
, safe_charsets
);
2534 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
2535 Check if a text is encoded in one of ISO-2022 based codig systems.
2536 If it is, return 1, else return 0. */
2539 detect_coding_iso_2022 (coding
, detect_info
)
2540 struct coding_system
*coding
;
2541 struct coding_detection_info
*detect_info
;
2543 const unsigned char *src
= coding
->source
, *src_base
= src
;
2544 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
2545 int multibytep
= coding
->src_multibyte
;
2546 int single_shifting
= 0;
2549 int consumed_chars
= 0;
2554 detect_info
->checked
|= CATEGORY_MASK_ISO
;
2556 for (i
= coding_category_iso_7
; i
<= coding_category_iso_8_else
; i
++)
2558 struct coding_system
*this = &(coding_categories
[i
]);
2559 Lisp_Object attrs
, val
;
2561 attrs
= CODING_ID_ATTRS (this->id
);
2562 if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT
2563 && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs
), Viso_2022_charset_list
))
2564 setup_iso_safe_charsets (attrs
);
2565 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
2566 this->max_charset_id
= SCHARS (val
) - 1;
2567 this->safe_charsets
= (char *) SDATA (val
);
2570 /* A coding system of this category is always ASCII compatible. */
2571 src
+= coding
->head_ascii
;
2573 while (rejected
!= CATEGORY_MASK_ISO
)
2580 if (inhibit_iso_escape_detection
)
2582 single_shifting
= 0;
2584 if (c
>= '(' && c
<= '/')
2586 /* Designation sequence for a charset of dimension 1. */
2588 if (c1
< ' ' || c1
>= 0x80
2589 || (id
= iso_charset_table
[0][c
>= ','][c1
]) < 0)
2590 /* Invalid designation sequence. Just ignore. */
2595 /* Designation sequence for a charset of dimension 2. */
2597 if (c
>= '@' && c
<= 'B')
2598 /* Designation for JISX0208.1978, GB2312, or JISX0208. */
2599 id
= iso_charset_table
[1][0][c
];
2600 else if (c
>= '(' && c
<= '/')
2603 if (c1
< ' ' || c1
>= 0x80
2604 || (id
= iso_charset_table
[1][c
>= ','][c1
]) < 0)
2605 /* Invalid designation sequence. Just ignore. */
2609 /* Invalid designation sequence. Just ignore it. */
2612 else if (c
== 'N' || c
== 'O')
2614 /* ESC <Fe> for SS2 or SS3. */
2615 single_shifting
= 1;
2616 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_8BIT
;
2619 else if (c
>= '0' && c
<= '4')
2621 /* ESC <Fp> for start/end composition. */
2622 found
|= CATEGORY_MASK_ISO
;
2627 /* Invalid escape sequence. Just ignore it. */
2631 /* We found a valid designation sequence for CHARSET. */
2632 rejected
|= CATEGORY_MASK_ISO_8BIT
;
2633 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7
],
2635 found
|= CATEGORY_MASK_ISO_7
;
2637 rejected
|= CATEGORY_MASK_ISO_7
;
2638 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7_tight
],
2640 found
|= CATEGORY_MASK_ISO_7_TIGHT
;
2642 rejected
|= CATEGORY_MASK_ISO_7_TIGHT
;
2643 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_7_else
],
2645 found
|= CATEGORY_MASK_ISO_7_ELSE
;
2647 rejected
|= CATEGORY_MASK_ISO_7_ELSE
;
2648 if (SAFE_CHARSET_P (&coding_categories
[coding_category_iso_8_else
],
2650 found
|= CATEGORY_MASK_ISO_8_ELSE
;
2652 rejected
|= CATEGORY_MASK_ISO_8_ELSE
;
2657 /* Locking shift out/in. */
2658 if (inhibit_iso_escape_detection
)
2660 single_shifting
= 0;
2661 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_8BIT
;
2665 /* Control sequence introducer. */
2666 single_shifting
= 0;
2667 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_7_ELSE
;
2668 found
|= CATEGORY_MASK_ISO_8_ELSE
;
2669 goto check_extra_latin
;
2674 if (inhibit_iso_escape_detection
)
2676 single_shifting
= 0;
2677 rejected
|= CATEGORY_MASK_ISO_7BIT
;
2678 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_1
])
2679 & CODING_ISO_FLAG_SINGLE_SHIFT
)
2680 found
|= CATEGORY_MASK_ISO_8_1
, single_shifting
= 1;
2681 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_2
])
2682 & CODING_ISO_FLAG_SINGLE_SHIFT
)
2683 found
|= CATEGORY_MASK_ISO_8_2
, single_shifting
= 1;
2684 if (single_shifting
)
2686 goto check_extra_latin
;
2693 single_shifting
= 0;
2698 rejected
|= CATEGORY_MASK_ISO_7BIT
| CATEGORY_MASK_ISO_7_ELSE
;
2699 found
|= CATEGORY_MASK_ISO_8_1
;
2700 /* Check the length of succeeding codes of the range
2701 0xA0..0FF. If the byte length is even, we include
2702 CATEGORY_MASK_ISO_8_2 in `found'. We can check this
2703 only when we are not single shifting. */
2704 if (! single_shifting
2705 && ! (rejected
& CATEGORY_MASK_ISO_8_2
))
2708 while (src
< src_end
)
2716 if (i
& 1 && src
< src_end
)
2717 rejected
|= CATEGORY_MASK_ISO_8_2
;
2719 found
|= CATEGORY_MASK_ISO_8_2
;
2724 single_shifting
= 0;
2725 if (! VECTORP (Vlatin_extra_code_table
)
2726 || NILP (XVECTOR (Vlatin_extra_code_table
)->contents
[c
]))
2728 rejected
= CATEGORY_MASK_ISO
;
2731 if (CODING_ISO_FLAGS (&coding_categories
[coding_category_iso_8_1
])
2732 & CODING_ISO_FLAG_LATIN_EXTRA
)
2733 found
|= CATEGORY_MASK_ISO_8_1
;
2735 rejected
|= CATEGORY_MASK_ISO_8_1
;
2736 rejected
|= CATEGORY_MASK_ISO_8_2
;
2739 detect_info
->rejected
|= CATEGORY_MASK_ISO
;
2743 detect_info
->rejected
|= rejected
;
2744 detect_info
->found
|= (found
& ~rejected
);
2749 /* Set designation state into CODING. Set CHARS_96 to -1 if the
2750 escape sequence should be kept. */
2751 #define DECODE_DESIGNATION(reg, dim, chars_96, final) \
2755 if (final < '0' || final >= 128 \
2756 || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \
2757 || !SAFE_CHARSET_P (coding, id)) \
2759 CODING_ISO_DESIGNATION (coding, reg) = -2; \
2763 prev = CODING_ISO_DESIGNATION (coding, reg); \
2764 if (id == charset_jisx0201_roman) \
2766 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \
2767 id = charset_ascii; \
2769 else if (id == charset_jisx0208_1978) \
2771 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \
2772 id = charset_jisx0208; \
2774 CODING_ISO_DESIGNATION (coding, reg) = id; \
2775 /* If there was an invalid designation to REG previously, and this \
2776 designation is ASCII to REG, we should keep this designation \
2778 if (prev == -2 && id == charset_ascii) \
2783 #define MAYBE_FINISH_COMPOSITION() \
2786 if (composition_state == COMPOSING_NO) \
2788 /* It is assured that we have enough room for producing \
2789 characters stored in the table `components'. */ \
2790 if (charbuf + component_idx > charbuf_end) \
2791 goto no_more_source; \
2792 composition_state = COMPOSING_NO; \
2793 if (method == COMPOSITION_RELATIVE \
2794 || method == COMPOSITION_WITH_ALTCHARS) \
2796 for (i = 0; i < component_idx; i++) \
2797 *charbuf++ = components[i]; \
2798 char_offset += component_idx; \
2802 for (i = 0; i < component_idx; i += 2) \
2803 *charbuf++ = components[i]; \
2804 char_offset += (component_idx / 2) + 1; \
2809 /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4.
2810 ESC 0 : relative composition : ESC 0 CHAR ... ESC 1
2811 ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1
2812 ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1
2813 ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1
2816 #define DECODE_COMPOSITION_START(c1) \
2819 && composition_state == COMPOSING_COMPONENT_RULE) \
2821 component_len = component_idx; \
2822 composition_state = COMPOSING_CHAR; \
2826 const unsigned char *p; \
2828 MAYBE_FINISH_COMPOSITION (); \
2829 if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \
2830 goto no_more_source; \
2831 for (p = src; p < src_end - 1; p++) \
2832 if (*p == ISO_CODE_ESC && p[1] == '1') \
2834 if (p == src_end - 1) \
2836 /* The current composition doesn't end in the current \
2838 record_conversion_result \
2839 (coding, CODING_RESULT_INSUFFICIENT_SRC); \
2840 goto no_more_source; \
2843 /* This is surely the start of a composition. */ \
2844 method = (c1 == '0' ? COMPOSITION_RELATIVE \
2845 : c1 == '2' ? COMPOSITION_WITH_RULE \
2846 : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \
2847 : COMPOSITION_WITH_RULE_ALTCHARS); \
2848 composition_state = (c1 <= '2' ? COMPOSING_CHAR \
2849 : COMPOSING_COMPONENT_CHAR); \
2850 component_idx = component_len = 0; \
2855 /* Handle compositoin end sequence ESC 1. */
2857 #define DECODE_COMPOSITION_END() \
2859 int nchars = (component_len > 0 ? component_idx - component_len \
2860 : method == COMPOSITION_RELATIVE ? component_idx \
2861 : (component_idx + 1) / 2); \
2863 int *saved_charbuf = charbuf; \
2865 ADD_COMPOSITION_DATA (charbuf, nchars, method); \
2866 if (method != COMPOSITION_RELATIVE) \
2868 if (component_len == 0) \
2869 for (i = 0; i < component_idx; i++) \
2870 *charbuf++ = components[i]; \
2872 for (i = 0; i < component_len; i++) \
2873 *charbuf++ = components[i]; \
2874 *saved_charbuf = saved_charbuf - charbuf; \
2876 if (method == COMPOSITION_WITH_RULE) \
2877 for (i = 0; i < component_idx; i += 2, char_offset++) \
2878 *charbuf++ = components[i]; \
2880 for (i = component_len; i < component_idx; i++, char_offset++) \
2881 *charbuf++ = components[i]; \
2882 coding->annotated = 1; \
2883 composition_state = COMPOSING_NO; \
2887 /* Decode a composition rule from the byte C1 (and maybe one more byte
2888 from SRC) and store one encoded composition rule in
2889 coding->cmp_data. */
2891 #define DECODE_COMPOSITION_RULE(c1) \
2894 if (c1 < 81) /* old format (before ver.21) */ \
2896 int gref = (c1) / 9; \
2897 int nref = (c1) % 9; \
2898 if (gref == 4) gref = 10; \
2899 if (nref == 4) nref = 10; \
2900 c1 = COMPOSITION_ENCODE_RULE (gref, nref); \
2902 else if (c1 < 93) /* new format (after ver.21) */ \
2904 ONE_MORE_BYTE (c2); \
2905 c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \
2912 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
2915 decode_coding_iso_2022 (coding
)
2916 struct coding_system
*coding
;
2918 const unsigned char *src
= coding
->source
+ coding
->consumed
;
2919 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
2920 const unsigned char *src_base
;
2921 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
2923 = coding
->charbuf
+ coding
->charbuf_size
- 4 - MAX_ANNOTATION_LENGTH
;
2924 int consumed_chars
= 0, consumed_chars_base
;
2925 int multibytep
= coding
->src_multibyte
;
2926 /* Charsets invoked to graphic plane 0 and 1 respectively. */
2927 int charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
2928 int charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
2929 int charset_id_2
, charset_id_3
;
2930 struct charset
*charset
;
2932 /* For handling composition sequence. */
2933 #define COMPOSING_NO 0
2934 #define COMPOSING_CHAR 1
2935 #define COMPOSING_RULE 2
2936 #define COMPOSING_COMPONENT_CHAR 3
2937 #define COMPOSING_COMPONENT_RULE 4
2939 int composition_state
= COMPOSING_NO
;
2940 enum composition_method method
;
2941 int components
[MAX_COMPOSITION_COMPONENTS
* 2 + 1];
2944 Lisp_Object attrs
, charset_list
;
2945 int char_offset
= coding
->produced_char
;
2946 int last_offset
= char_offset
;
2947 int last_id
= charset_ascii
;
2949 CODING_GET_INFO (coding
, attrs
, charset_list
);
2950 setup_iso_safe_charsets (attrs
);
2951 /* Charset list may have been changed. */
2952 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
2953 coding
->safe_charsets
= (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs
));
2960 consumed_chars_base
= consumed_chars
;
2962 if (charbuf
>= charbuf_end
)
2969 /* We produce at most one character. */
2970 switch (iso_code_class
[c1
])
2972 case ISO_0x20_or_0x7F
:
2973 if (composition_state
!= COMPOSING_NO
)
2975 if (composition_state
== COMPOSING_RULE
2976 || composition_state
== COMPOSING_COMPONENT_RULE
)
2978 DECODE_COMPOSITION_RULE (c1
);
2979 components
[component_idx
++] = c1
;
2980 composition_state
--;
2984 if (charset_id_0
< 0
2985 || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0
)))
2986 /* This is SPACE or DEL. */
2987 charset
= CHARSET_FROM_ID (charset_ascii
);
2989 charset
= CHARSET_FROM_ID (charset_id_0
);
2992 case ISO_graphic_plane_0
:
2993 if (composition_state
!= COMPOSING_NO
)
2995 if (composition_state
== COMPOSING_RULE
2996 || composition_state
== COMPOSING_COMPONENT_RULE
)
2998 DECODE_COMPOSITION_RULE (c1
);
2999 components
[component_idx
++] = c1
;
3000 composition_state
--;
3004 if (charset_id_0
< 0)
3005 charset
= CHARSET_FROM_ID (charset_ascii
);
3007 charset
= CHARSET_FROM_ID (charset_id_0
);
3010 case ISO_0xA0_or_0xFF
:
3011 if (charset_id_1
< 0
3012 || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1
))
3013 || CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SEVEN_BITS
)
3015 /* This is a graphic character, we fall down ... */
3017 case ISO_graphic_plane_1
:
3018 if (charset_id_1
< 0)
3020 charset
= CHARSET_FROM_ID (charset_id_1
);
3024 MAYBE_FINISH_COMPOSITION ();
3025 charset
= CHARSET_FROM_ID (charset_ascii
);
3029 MAYBE_FINISH_COMPOSITION ();
3033 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3034 || CODING_ISO_DESIGNATION (coding
, 1) < 0)
3036 CODING_ISO_INVOCATION (coding
, 0) = 1;
3037 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3041 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
))
3043 CODING_ISO_INVOCATION (coding
, 0) = 0;
3044 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3047 case ISO_single_shift_2_7
:
3048 case ISO_single_shift_2
:
3049 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
))
3051 /* SS2 is handled as an escape sequence of ESC 'N' */
3053 goto label_escape_sequence
;
3055 case ISO_single_shift_3
:
3056 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
))
3058 /* SS2 is handled as an escape sequence of ESC 'O' */
3060 goto label_escape_sequence
;
3062 case ISO_control_sequence_introducer
:
3063 /* CSI is handled as an escape sequence of ESC '[' ... */
3065 goto label_escape_sequence
;
3069 label_escape_sequence
:
3070 /* Escape sequences handled here are invocation,
3071 designation, direction specification, and character
3072 composition specification. */
3075 case '&': /* revision of following character set */
3077 if (!(c1
>= '@' && c1
<= '~'))
3080 if (c1
!= ISO_CODE_ESC
)
3083 goto label_escape_sequence
;
3085 case '$': /* designation of 2-byte character set */
3086 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATION
))
3092 if (c1
>= '@' && c1
<= 'B')
3093 { /* designation of JISX0208.1978, GB2312.1980,
3095 reg
= 0, chars96
= 0;
3097 else if (c1
>= 0x28 && c1
<= 0x2B)
3098 { /* designation of DIMENSION2_CHARS94 character set */
3099 reg
= c1
- 0x28, chars96
= 0;
3102 else if (c1
>= 0x2C && c1
<= 0x2F)
3103 { /* designation of DIMENSION2_CHARS96 character set */
3104 reg
= c1
- 0x2C, chars96
= 1;
3109 DECODE_DESIGNATION (reg
, 2, chars96
, c1
);
3110 /* We must update these variables now. */
3112 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3114 charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
3120 case 'n': /* invocation of locking-shift-2 */
3121 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3122 || CODING_ISO_DESIGNATION (coding
, 2) < 0)
3124 CODING_ISO_INVOCATION (coding
, 0) = 2;
3125 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3128 case 'o': /* invocation of locking-shift-3 */
3129 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_LOCKING_SHIFT
)
3130 || CODING_ISO_DESIGNATION (coding
, 3) < 0)
3132 CODING_ISO_INVOCATION (coding
, 0) = 3;
3133 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3136 case 'N': /* invocation of single-shift-2 */
3137 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3138 || CODING_ISO_DESIGNATION (coding
, 2) < 0)
3140 charset_id_2
= CODING_ISO_DESIGNATION (coding
, 2);
3141 if (charset_id_2
< 0)
3142 charset
= CHARSET_FROM_ID (charset_ascii
);
3144 charset
= CHARSET_FROM_ID (charset_id_2
);
3146 if (c1
< 0x20 || (c1
>= 0x80 && c1
< 0xA0))
3150 case 'O': /* invocation of single-shift-3 */
3151 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3152 || CODING_ISO_DESIGNATION (coding
, 3) < 0)
3154 charset_id_3
= CODING_ISO_DESIGNATION (coding
, 3);
3155 if (charset_id_3
< 0)
3156 charset
= CHARSET_FROM_ID (charset_ascii
);
3158 charset
= CHARSET_FROM_ID (charset_id_3
);
3160 if (c1
< 0x20 || (c1
>= 0x80 && c1
< 0xA0))
3164 case '0': case '2': case '3': case '4': /* start composition */
3165 if (! (coding
->common_flags
& CODING_ANNOTATE_COMPOSITION_MASK
))
3167 DECODE_COMPOSITION_START (c1
);
3170 case '1': /* end composition */
3171 if (composition_state
== COMPOSING_NO
)
3173 DECODE_COMPOSITION_END ();
3176 case '[': /* specification of direction */
3177 if (! CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DIRECTION
)
3179 /* For the moment, nested direction is not supported.
3180 So, `coding->mode & CODING_MODE_DIRECTION' zero means
3181 left-to-right, and nozero means right-to-left. */
3185 case ']': /* end of the current direction */
3186 coding
->mode
&= ~CODING_MODE_DIRECTION
;
3188 case '0': /* end of the current direction */
3189 case '1': /* start of left-to-right direction */
3192 coding
->mode
&= ~CODING_MODE_DIRECTION
;
3197 case '2': /* start of right-to-left direction */
3200 coding
->mode
|= CODING_MODE_DIRECTION
;
3214 /* CTEXT extended segment:
3215 ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES--
3216 We keep these bytes as is for the moment.
3217 They may be decoded by post-read-conversion. */
3221 ONE_MORE_BYTE (dim
);
3224 size
= ((M
- 128) * 128) + (L
- 128);
3225 if (charbuf
+ 8 + size
> charbuf_end
)
3227 *charbuf
++ = ISO_CODE_ESC
;
3231 *charbuf
++ = BYTE8_TO_CHAR (M
);
3232 *charbuf
++ = BYTE8_TO_CHAR (L
);
3236 *charbuf
++ = ASCII_BYTE_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
3241 /* XFree86 extension for embedding UTF-8 in CTEXT:
3242 ESC % G --UTF-8-BYTES-- ESC % @
3243 We keep these bytes as is for the moment.
3244 They may be decoded by post-read-conversion. */
3247 if (p
+ 6 > charbuf_end
)
3249 *p
++ = ISO_CODE_ESC
;
3252 while (p
< charbuf_end
)
3255 if (c1
== ISO_CODE_ESC
3256 && src
+ 1 < src_end
3263 *p
++ = ASCII_BYTE_P (c1
) ? c1
: BYTE8_TO_CHAR (c1
);
3265 if (p
+ 3 > charbuf_end
)
3267 *p
++ = ISO_CODE_ESC
;
3278 if (! (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATION
))
3283 if (c1
>= 0x28 && c1
<= 0x2B)
3284 { /* designation of DIMENSION1_CHARS94 character set */
3285 reg
= c1
- 0x28, chars96
= 0;
3288 else if (c1
>= 0x2C && c1
<= 0x2F)
3289 { /* designation of DIMENSION1_CHARS96 character set */
3290 reg
= c1
- 0x2C, chars96
= 1;
3295 DECODE_DESIGNATION (reg
, 1, chars96
, c1
);
3296 /* We must update these variables now. */
3298 charset_id_0
= CODING_ISO_INVOKED_CHARSET (coding
, 0);
3300 charset_id_1
= CODING_ISO_INVOKED_CHARSET (coding
, 1);
3308 if (charset
->id
!= charset_ascii
3309 && last_id
!= charset
->id
)
3311 if (last_id
!= charset_ascii
)
3312 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
3313 last_id
= charset
->id
;
3314 last_offset
= char_offset
;
3317 /* Now we know CHARSET and 1st position code C1 of a character.
3318 Produce a decoded character while getting 2nd position code
3321 if (CHARSET_DIMENSION (charset
) > 1)
3324 if (c2
< 0x20 || (c2
>= 0x80 && c2
< 0xA0))
3325 /* C2 is not in a valid range. */
3327 c1
= (c1
<< 8) | (c2
& 0x7F);
3328 if (CHARSET_DIMENSION (charset
) > 2)
3331 if (c2
< 0x20 || (c2
>= 0x80 && c2
< 0xA0))
3332 /* C2 is not in a valid range. */
3334 c1
= (c1
<< 8) | (c2
& 0x7F);
3338 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c1
, c
);
3341 MAYBE_FINISH_COMPOSITION ();
3342 for (; src_base
< src
; src_base
++, char_offset
++)
3344 if (ASCII_BYTE_P (*src_base
))
3345 *charbuf
++ = *src_base
;
3347 *charbuf
++ = BYTE8_TO_CHAR (*src_base
);
3350 else if (composition_state
== COMPOSING_NO
)
3357 components
[component_idx
++] = c
;
3358 if (method
== COMPOSITION_WITH_RULE
3359 || (method
== COMPOSITION_WITH_RULE_ALTCHARS
3360 && composition_state
== COMPOSING_COMPONENT_CHAR
))
3361 composition_state
++;
3366 MAYBE_FINISH_COMPOSITION ();
3368 consumed_chars
= consumed_chars_base
;
3370 *charbuf
++ = c
< 0 ? -c
: ASCII_BYTE_P (c
) ? c
: BYTE8_TO_CHAR (c
);
3380 if (last_id
!= charset_ascii
)
3381 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
3382 coding
->consumed_char
+= consumed_chars_base
;
3383 coding
->consumed
= src_base
- coding
->source
;
3384 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
3388 /* ISO2022 encoding stuff. */
3391 It is not enough to say just "ISO2022" on encoding, we have to
3392 specify more details. In Emacs, each coding system of ISO2022
3393 variant has the following specifications:
3394 1. Initial designation to G0 thru G3.
3395 2. Allows short-form designation?
3396 3. ASCII should be designated to G0 before control characters?
3397 4. ASCII should be designated to G0 at end of line?
3398 5. 7-bit environment or 8-bit environment?
3399 6. Use locking-shift?
3400 7. Use Single-shift?
3401 And the following two are only for Japanese:
3402 8. Use ASCII in place of JIS0201-1976-Roman?
3403 9. Use JISX0208-1983 in place of JISX0208-1978?
3404 These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits
3405 defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more
3409 /* Produce codes (escape sequence) for designating CHARSET to graphic
3410 register REG at DST, and increment DST. If <final-char> of CHARSET is
3411 '@', 'A', or 'B' and the coding system CODING allows, produce
3412 designation sequence of short-form. */
3414 #define ENCODE_DESIGNATION(charset, reg, coding) \
3416 unsigned char final_char = CHARSET_ISO_FINAL (charset); \
3417 char *intermediate_char_94 = "()*+"; \
3418 char *intermediate_char_96 = ",-./"; \
3419 int revision = -1; \
3422 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \
3423 revision = CHARSET_ISO_REVISION (charset); \
3425 if (revision >= 0) \
3427 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \
3428 EMIT_ONE_BYTE ('@' + revision); \
3430 EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \
3431 if (CHARSET_DIMENSION (charset) == 1) \
3433 if (! CHARSET_ISO_CHARS_96 (charset)) \
3434 c = intermediate_char_94[reg]; \
3436 c = intermediate_char_96[reg]; \
3437 EMIT_ONE_ASCII_BYTE (c); \
3441 EMIT_ONE_ASCII_BYTE ('$'); \
3442 if (! CHARSET_ISO_CHARS_96 (charset)) \
3444 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \
3446 || final_char < '@' || final_char > 'B') \
3447 EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \
3450 EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \
3452 EMIT_ONE_ASCII_BYTE (final_char); \
3454 CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \
3458 /* The following two macros produce codes (control character or escape
3459 sequence) for ISO2022 single-shift functions (single-shift-2 and
3462 #define ENCODE_SINGLE_SHIFT_2 \
3464 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
3465 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \
3467 EMIT_ONE_BYTE (ISO_CODE_SS2); \
3468 CODING_ISO_SINGLE_SHIFTING (coding) = 1; \
3472 #define ENCODE_SINGLE_SHIFT_3 \
3474 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
3475 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \
3477 EMIT_ONE_BYTE (ISO_CODE_SS3); \
3478 CODING_ISO_SINGLE_SHIFTING (coding) = 1; \
3482 /* The following four macros produce codes (control character or
3483 escape sequence) for ISO2022 locking-shift functions (shift-in,
3484 shift-out, locking-shift-2, and locking-shift-3). */
3486 #define ENCODE_SHIFT_IN \
3488 EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \
3489 CODING_ISO_INVOCATION (coding, 0) = 0; \
3493 #define ENCODE_SHIFT_OUT \
3495 EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \
3496 CODING_ISO_INVOCATION (coding, 0) = 1; \
3500 #define ENCODE_LOCKING_SHIFT_2 \
3502 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \
3503 CODING_ISO_INVOCATION (coding, 0) = 2; \
3507 #define ENCODE_LOCKING_SHIFT_3 \
3509 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \
3510 CODING_ISO_INVOCATION (coding, 0) = 3; \
3514 /* Produce codes for a DIMENSION1 character whose character set is
3515 CHARSET and whose position-code is C1. Designation and invocation
3516 sequences are also produced in advance if necessary. */
3518 #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \
3520 int id = CHARSET_ID (charset); \
3522 if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \
3523 && id == charset_ascii) \
3525 id = charset_jisx0201_roman; \
3526 charset = CHARSET_FROM_ID (id); \
3529 if (CODING_ISO_SINGLE_SHIFTING (coding)) \
3531 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
3532 EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \
3534 EMIT_ONE_BYTE (c1 | 0x80); \
3535 CODING_ISO_SINGLE_SHIFTING (coding) = 0; \
3538 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \
3540 EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \
3543 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \
3545 EMIT_ONE_BYTE (c1 | 0x80); \
3549 /* Since CHARSET is not yet invoked to any graphic planes, we \
3550 must invoke it, or, at first, designate it to some graphic \
3551 register. Then repeat the loop to actually produce the \
3553 dst = encode_invocation_designation (charset, coding, dst, \
3558 /* Produce codes for a DIMENSION2 character whose character set is
3559 CHARSET and whose position-codes are C1 and C2. Designation and
3560 invocation codes are also produced in advance if necessary. */
3562 #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \
3564 int id = CHARSET_ID (charset); \
3566 if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \
3567 && id == charset_jisx0208) \
3569 id = charset_jisx0208_1978; \
3570 charset = CHARSET_FROM_ID (id); \
3573 if (CODING_ISO_SINGLE_SHIFTING (coding)) \
3575 if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \
3576 EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \
3578 EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \
3579 CODING_ISO_SINGLE_SHIFTING (coding) = 0; \
3582 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \
3584 EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \
3587 else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \
3589 EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \
3593 /* Since CHARSET is not yet invoked to any graphic planes, we \
3594 must invoke it, or, at first, designate it to some graphic \
3595 register. Then repeat the loop to actually produce the \
3597 dst = encode_invocation_designation (charset, coding, dst, \
3602 #define ENCODE_ISO_CHARACTER(charset, c) \
3604 int code = ENCODE_CHAR ((charset),(c)); \
3606 if (CHARSET_DIMENSION (charset) == 1) \
3607 ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \
3609 ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \
3613 /* Produce designation and invocation codes at a place pointed by DST
3614 to use CHARSET. The element `spec.iso_2022' of *CODING is updated.
3618 encode_invocation_designation (charset
, coding
, dst
, p_nchars
)
3619 struct charset
*charset
;
3620 struct coding_system
*coding
;
3624 int multibytep
= coding
->dst_multibyte
;
3625 int produced_chars
= *p_nchars
;
3626 int reg
; /* graphic register number */
3627 int id
= CHARSET_ID (charset
);
3629 /* At first, check designations. */
3630 for (reg
= 0; reg
< 4; reg
++)
3631 if (id
== CODING_ISO_DESIGNATION (coding
, reg
))
3636 /* CHARSET is not yet designated to any graphic registers. */
3637 /* At first check the requested designation. */
3638 reg
= CODING_ISO_REQUEST (coding
, id
);
3640 /* Since CHARSET requests no special designation, designate it
3641 to graphic register 0. */
3644 ENCODE_DESIGNATION (charset
, reg
, coding
);
3647 if (CODING_ISO_INVOCATION (coding
, 0) != reg
3648 && CODING_ISO_INVOCATION (coding
, 1) != reg
)
3650 /* Since the graphic register REG is not invoked to any graphic
3651 planes, invoke it to graphic plane 0. */
3654 case 0: /* graphic register 0 */
3658 case 1: /* graphic register 1 */
3662 case 2: /* graphic register 2 */
3663 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3664 ENCODE_SINGLE_SHIFT_2
;
3666 ENCODE_LOCKING_SHIFT_2
;
3669 case 3: /* graphic register 3 */
3670 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_SINGLE_SHIFT
)
3671 ENCODE_SINGLE_SHIFT_3
;
3673 ENCODE_LOCKING_SHIFT_3
;
3678 *p_nchars
= produced_chars
;
3682 /* The following three macros produce codes for indicating direction
3684 #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \
3686 if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \
3687 EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \
3689 EMIT_ONE_BYTE (ISO_CODE_CSI); \
3693 #define ENCODE_DIRECTION_R2L() \
3695 ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \
3696 EMIT_TWO_ASCII_BYTES ('2', ']'); \
3700 #define ENCODE_DIRECTION_L2R() \
3702 ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \
3703 EMIT_TWO_ASCII_BYTES ('0', ']'); \
3707 /* Produce codes for designation and invocation to reset the graphic
3708 planes and registers to initial state. */
3709 #define ENCODE_RESET_PLANE_AND_REGISTER() \
3712 struct charset *charset; \
3714 if (CODING_ISO_INVOCATION (coding, 0) != 0) \
3716 for (reg = 0; reg < 4; reg++) \
3717 if (CODING_ISO_INITIAL (coding, reg) >= 0 \
3718 && (CODING_ISO_DESIGNATION (coding, reg) \
3719 != CODING_ISO_INITIAL (coding, reg))) \
3721 charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \
3722 ENCODE_DESIGNATION (charset, reg, coding); \
3727 /* Produce designation sequences of charsets in the line started from
3728 SRC to a place pointed by DST, and return updated DST.
3730 If the current block ends before any end-of-line, we may fail to
3731 find all the necessary designations. */
3733 static unsigned char *
3734 encode_designation_at_bol (coding
, charbuf
, charbuf_end
, dst
)
3735 struct coding_system
*coding
;
3736 int *charbuf
, *charbuf_end
;
3739 struct charset
*charset
;
3740 /* Table of charsets to be designated to each graphic register. */
3742 int c
, found
= 0, reg
;
3743 int produced_chars
= 0;
3744 int multibytep
= coding
->dst_multibyte
;
3746 Lisp_Object charset_list
;
3748 attrs
= CODING_ID_ATTRS (coding
->id
);
3749 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
3750 if (EQ (charset_list
, Qiso_2022
))
3751 charset_list
= Viso_2022_charset_list
;
3753 for (reg
= 0; reg
< 4; reg
++)
3763 charset
= char_charset (c
, charset_list
, NULL
);
3764 id
= CHARSET_ID (charset
);
3765 reg
= CODING_ISO_REQUEST (coding
, id
);
3766 if (reg
>= 0 && r
[reg
] < 0)
3775 for (reg
= 0; reg
< 4; reg
++)
3777 && CODING_ISO_DESIGNATION (coding
, reg
) != r
[reg
])
3778 ENCODE_DESIGNATION (CHARSET_FROM_ID (r
[reg
]), reg
, coding
);
3784 /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */
3787 encode_coding_iso_2022 (coding
)
3788 struct coding_system
*coding
;
3790 int multibytep
= coding
->dst_multibyte
;
3791 int *charbuf
= coding
->charbuf
;
3792 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
3793 unsigned char *dst
= coding
->destination
+ coding
->produced
;
3794 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
3797 = (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATE_AT_BOL
3798 && CODING_ISO_BOL (coding
));
3799 int produced_chars
= 0;
3800 Lisp_Object attrs
, eol_type
, charset_list
;
3801 int ascii_compatible
;
3803 int preferred_charset_id
= -1;
3805 CODING_GET_INFO (coding
, attrs
, charset_list
);
3806 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
3807 if (VECTORP (eol_type
))
3810 setup_iso_safe_charsets (attrs
);
3811 /* Charset list may have been changed. */
3812 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
3813 coding
->safe_charsets
= (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs
));
3815 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
3817 while (charbuf
< charbuf_end
)
3819 ASSURE_DESTINATION (safe_room
);
3821 if (bol_designation
)
3823 unsigned char *dst_prev
= dst
;
3825 /* We have to produce designation sequences if any now. */
3826 dst
= encode_designation_at_bol (coding
, charbuf
, charbuf_end
, dst
);
3827 bol_designation
= 0;
3828 /* We are sure that designation sequences are all ASCII bytes. */
3829 produced_chars
+= dst
- dst_prev
;
3836 /* Handle an annotation. */
3839 case CODING_ANNOTATE_COMPOSITION_MASK
:
3840 /* Not yet implemented. */
3842 case CODING_ANNOTATE_CHARSET_MASK
:
3843 preferred_charset_id
= charbuf
[2];
3844 if (preferred_charset_id
>= 0
3845 && NILP (Fmemq (make_number (preferred_charset_id
),
3847 preferred_charset_id
= -1;
3856 /* Now encode the character C. */
3857 if (c
< 0x20 || c
== 0x7F)
3860 || (c
== '\r' && EQ (eol_type
, Qmac
)))
3862 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_EOL
)
3863 ENCODE_RESET_PLANE_AND_REGISTER ();
3864 if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_INIT_AT_BOL
)
3868 for (i
= 0; i
< 4; i
++)
3869 CODING_ISO_DESIGNATION (coding
, i
)
3870 = CODING_ISO_INITIAL (coding
, i
);
3873 = CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_DESIGNATE_AT_BOL
;
3875 else if (CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_CNTL
)
3876 ENCODE_RESET_PLANE_AND_REGISTER ();
3877 EMIT_ONE_ASCII_BYTE (c
);
3879 else if (ASCII_CHAR_P (c
))
3881 if (ascii_compatible
)
3882 EMIT_ONE_ASCII_BYTE (c
);
3885 struct charset
*charset
= CHARSET_FROM_ID (charset_ascii
);
3886 ENCODE_ISO_CHARACTER (charset
, c
);
3889 else if (CHAR_BYTE8_P (c
))
3891 c
= CHAR_TO_BYTE8 (c
);
3896 struct charset
*charset
;
3898 if (preferred_charset_id
>= 0)
3900 charset
= CHARSET_FROM_ID (preferred_charset_id
);
3901 if (! CHAR_CHARSET_P (c
, charset
))
3902 charset
= char_charset (c
, charset_list
, NULL
);
3905 charset
= char_charset (c
, charset_list
, NULL
);
3908 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
3910 c
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
3911 charset
= CHARSET_FROM_ID (charset_ascii
);
3915 c
= coding
->default_char
;
3916 charset
= char_charset (c
, charset_list
, NULL
);
3919 ENCODE_ISO_CHARACTER (charset
, c
);
3923 if (coding
->mode
& CODING_MODE_LAST_BLOCK
3924 && CODING_ISO_FLAGS (coding
) & CODING_ISO_FLAG_RESET_AT_EOL
)
3926 ASSURE_DESTINATION (safe_room
);
3927 ENCODE_RESET_PLANE_AND_REGISTER ();
3929 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
3930 CODING_ISO_BOL (coding
) = bol_designation
;
3931 coding
->produced_char
+= produced_chars
;
3932 coding
->produced
= dst
- coding
->destination
;
3937 /*** 8,9. SJIS and BIG5 handlers ***/
3939 /* Although SJIS and BIG5 are not ISO's coding system, they are used
3940 quite widely. So, for the moment, Emacs supports them in the bare
3941 C code. But, in the future, they may be supported only by CCL. */
3943 /* SJIS is a coding system encoding three character sets: ASCII, right
3944 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
3945 as is. A character of charset katakana-jisx0201 is encoded by
3946 "position-code + 0x80". A character of charset japanese-jisx0208
3947 is encoded in 2-byte but two position-codes are divided and shifted
3948 so that it fit in the range below.
3950 --- CODE RANGE of SJIS ---
3951 (character set) (range)
3953 KATAKANA-JISX0201 0xA0 .. 0xDF
3954 JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF
3955 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
3956 -------------------------------
3960 /* BIG5 is a coding system encoding two character sets: ASCII and
3961 Big5. An ASCII character is encoded as is. Big5 is a two-byte
3962 character set and is encoded in two-byte.
3964 --- CODE RANGE of BIG5 ---
3965 (character set) (range)
3967 Big5 (1st byte) 0xA1 .. 0xFE
3968 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
3969 --------------------------
3973 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
3974 Check if a text is encoded in SJIS. If it is, return
3975 CATEGORY_MASK_SJIS, else return 0. */
3978 detect_coding_sjis (coding
, detect_info
)
3979 struct coding_system
*coding
;
3980 struct coding_detection_info
*detect_info
;
3982 const unsigned char *src
= coding
->source
, *src_base
;
3983 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
3984 int multibytep
= coding
->src_multibyte
;
3985 int consumed_chars
= 0;
3989 detect_info
->checked
|= CATEGORY_MASK_SJIS
;
3990 /* A coding system of this category is always ASCII compatible. */
3991 src
+= coding
->head_ascii
;
3999 if ((c
>= 0x81 && c
<= 0x9F) || (c
>= 0xE0 && c
<= 0xEF))
4002 if (c
< 0x40 || c
== 0x7F || c
> 0xFC)
4004 found
= CATEGORY_MASK_SJIS
;
4006 else if (c
>= 0xA0 && c
< 0xE0)
4007 found
= CATEGORY_MASK_SJIS
;
4011 detect_info
->rejected
|= CATEGORY_MASK_SJIS
;
4015 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
4017 detect_info
->rejected
|= CATEGORY_MASK_SJIS
;
4020 detect_info
->found
|= found
;
4024 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
4025 Check if a text is encoded in BIG5. If it is, return
4026 CATEGORY_MASK_BIG5, else return 0. */
4029 detect_coding_big5 (coding
, detect_info
)
4030 struct coding_system
*coding
;
4031 struct coding_detection_info
*detect_info
;
4033 const unsigned char *src
= coding
->source
, *src_base
;
4034 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4035 int multibytep
= coding
->src_multibyte
;
4036 int consumed_chars
= 0;
4040 detect_info
->checked
|= CATEGORY_MASK_BIG5
;
4041 /* A coding system of this category is always ASCII compatible. */
4042 src
+= coding
->head_ascii
;
4053 if (c
< 0x40 || (c
>= 0x7F && c
<= 0xA0))
4055 found
= CATEGORY_MASK_BIG5
;
4060 detect_info
->rejected
|= CATEGORY_MASK_BIG5
;
4064 if (src_base
< src
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
4066 detect_info
->rejected
|= CATEGORY_MASK_BIG5
;
4069 detect_info
->found
|= found
;
4073 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions".
4074 If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */
4077 decode_coding_sjis (coding
)
4078 struct coding_system
*coding
;
4080 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4081 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4082 const unsigned char *src_base
;
4083 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4085 = coding
->charbuf
+ coding
->charbuf_size
- MAX_ANNOTATION_LENGTH
;
4086 int consumed_chars
= 0, consumed_chars_base
;
4087 int multibytep
= coding
->src_multibyte
;
4088 struct charset
*charset_roman
, *charset_kanji
, *charset_kana
;
4089 struct charset
*charset_kanji2
;
4090 Lisp_Object attrs
, charset_list
, val
;
4091 int char_offset
= coding
->produced_char
;
4092 int last_offset
= char_offset
;
4093 int last_id
= charset_ascii
;
4095 CODING_GET_INFO (coding
, attrs
, charset_list
);
4098 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4099 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4100 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4101 charset_kanji2
= NILP (val
) ? NULL
: CHARSET_FROM_ID (XINT (XCAR (val
)));
4106 struct charset
*charset
;
4109 consumed_chars_base
= consumed_chars
;
4111 if (charbuf
>= charbuf_end
)
4118 charset
= charset_roman
;
4119 else if (c
== 0x80 || c
== 0xA0)
4121 else if (c
>= 0xA1 && c
<= 0xDF)
4123 /* SJIS -> JISX0201-Kana */
4125 charset
= charset_kana
;
4129 /* SJIS -> JISX0208 */
4131 if (c1
< 0x40 || c1
== 0x7F || c1
> 0xFC)
4135 charset
= charset_kanji
;
4137 else if (c
<= 0xFC && charset_kanji2
)
4139 /* SJIS -> JISX0213-2 */
4141 if (c1
< 0x40 || c1
== 0x7F || c1
> 0xFC)
4145 charset
= charset_kanji2
;
4149 if (charset
->id
!= charset_ascii
4150 && last_id
!= charset
->id
)
4152 if (last_id
!= charset_ascii
)
4153 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4154 last_id
= charset
->id
;
4155 last_offset
= char_offset
;
4157 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c
, c
);
4164 consumed_chars
= consumed_chars_base
;
4166 *charbuf
++ = c
< 0 ? -c
: BYTE8_TO_CHAR (c
);
4172 if (last_id
!= charset_ascii
)
4173 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4174 coding
->consumed_char
+= consumed_chars_base
;
4175 coding
->consumed
= src_base
- coding
->source
;
4176 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4180 decode_coding_big5 (coding
)
4181 struct coding_system
*coding
;
4183 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4184 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4185 const unsigned char *src_base
;
4186 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4188 = coding
->charbuf
+ coding
->charbuf_size
- MAX_ANNOTATION_LENGTH
;
4189 int consumed_chars
= 0, consumed_chars_base
;
4190 int multibytep
= coding
->src_multibyte
;
4191 struct charset
*charset_roman
, *charset_big5
;
4192 Lisp_Object attrs
, charset_list
, val
;
4193 int char_offset
= coding
->produced_char
;
4194 int last_offset
= char_offset
;
4195 int last_id
= charset_ascii
;
4197 CODING_GET_INFO (coding
, attrs
, charset_list
);
4199 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4200 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
4205 struct charset
*charset
;
4208 consumed_chars_base
= consumed_chars
;
4210 if (charbuf
>= charbuf_end
)
4218 charset
= charset_roman
;
4222 if (c
< 0xA1 || c
> 0xFE)
4225 if (c1
< 0x40 || (c1
> 0x7E && c1
< 0xA1) || c1
> 0xFE)
4228 charset
= charset_big5
;
4230 if (charset
->id
!= charset_ascii
4231 && last_id
!= charset
->id
)
4233 if (last_id
!= charset_ascii
)
4234 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4235 last_id
= charset
->id
;
4236 last_offset
= char_offset
;
4238 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
, charset
, c
, c
);
4245 consumed_chars
= consumed_chars_base
;
4247 *charbuf
++ = c
< 0 ? -c
: BYTE8_TO_CHAR (c
);
4253 if (last_id
!= charset_ascii
)
4254 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4255 coding
->consumed_char
+= consumed_chars_base
;
4256 coding
->consumed
= src_base
- coding
->source
;
4257 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4260 /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions".
4261 This function can encode charsets `ascii', `katakana-jisx0201',
4262 `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We
4263 are sure that all these charsets are registered as official charset
4264 (i.e. do not have extended leading-codes). Characters of other
4265 charsets are produced without any encoding. If SJIS_P is 1, encode
4266 SJIS text, else encode BIG5 text. */
4269 encode_coding_sjis (coding
)
4270 struct coding_system
*coding
;
4272 int multibytep
= coding
->dst_multibyte
;
4273 int *charbuf
= coding
->charbuf
;
4274 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4275 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4276 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4278 int produced_chars
= 0;
4279 Lisp_Object attrs
, charset_list
, val
;
4280 int ascii_compatible
;
4281 struct charset
*charset_roman
, *charset_kanji
, *charset_kana
;
4282 struct charset
*charset_kanji2
;
4285 CODING_GET_INFO (coding
, attrs
, charset_list
);
4287 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4288 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4289 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4290 charset_kanji2
= NILP (val
) ? NULL
: CHARSET_FROM_ID (XINT (XCAR (val
)));
4292 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
4294 while (charbuf
< charbuf_end
)
4296 ASSURE_DESTINATION (safe_room
);
4298 /* Now encode the character C. */
4299 if (ASCII_CHAR_P (c
) && ascii_compatible
)
4300 EMIT_ONE_ASCII_BYTE (c
);
4301 else if (CHAR_BYTE8_P (c
))
4303 c
= CHAR_TO_BYTE8 (c
);
4309 struct charset
*charset
= char_charset (c
, charset_list
, &code
);
4313 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
4315 code
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
4316 charset
= CHARSET_FROM_ID (charset_ascii
);
4320 c
= coding
->default_char
;
4321 charset
= char_charset (c
, charset_list
, &code
);
4324 if (code
== CHARSET_INVALID_CODE (charset
))
4326 if (charset
== charset_kanji
)
4330 c1
= code
>> 8, c2
= code
& 0xFF;
4331 EMIT_TWO_BYTES (c1
, c2
);
4333 else if (charset
== charset_kana
)
4334 EMIT_ONE_BYTE (code
| 0x80);
4335 else if (charset_kanji2
&& charset
== charset_kanji2
)
4340 if (c1
== 0x21 || (c1
>= 0x23 && c1
< 0x25)
4341 || (c1
>= 0x2C && c1
<= 0x2F) || c1
>= 0x6E)
4343 JIS_TO_SJIS2 (code
);
4344 c1
= code
>> 8, c2
= code
& 0xFF;
4345 EMIT_TWO_BYTES (c1
, c2
);
4348 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
4351 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
4354 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4355 coding
->produced_char
+= produced_chars
;
4356 coding
->produced
= dst
- coding
->destination
;
4361 encode_coding_big5 (coding
)
4362 struct coding_system
*coding
;
4364 int multibytep
= coding
->dst_multibyte
;
4365 int *charbuf
= coding
->charbuf
;
4366 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4367 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4368 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4370 int produced_chars
= 0;
4371 Lisp_Object attrs
, charset_list
, val
;
4372 int ascii_compatible
;
4373 struct charset
*charset_roman
, *charset_big5
;
4376 CODING_GET_INFO (coding
, attrs
, charset_list
);
4378 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
4379 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
4380 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
4382 while (charbuf
< charbuf_end
)
4384 ASSURE_DESTINATION (safe_room
);
4386 /* Now encode the character C. */
4387 if (ASCII_CHAR_P (c
) && ascii_compatible
)
4388 EMIT_ONE_ASCII_BYTE (c
);
4389 else if (CHAR_BYTE8_P (c
))
4391 c
= CHAR_TO_BYTE8 (c
);
4397 struct charset
*charset
= char_charset (c
, charset_list
, &code
);
4401 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
4403 code
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
4404 charset
= CHARSET_FROM_ID (charset_ascii
);
4408 c
= coding
->default_char
;
4409 charset
= char_charset (c
, charset_list
, &code
);
4412 if (code
== CHARSET_INVALID_CODE (charset
))
4414 if (charset
== charset_big5
)
4418 c1
= code
>> 8, c2
= code
& 0xFF;
4419 EMIT_TWO_BYTES (c1
, c2
);
4422 EMIT_ONE_ASCII_BYTE (code
& 0x7F);
4425 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4426 coding
->produced_char
+= produced_chars
;
4427 coding
->produced
= dst
- coding
->destination
;
4432 /*** 10. CCL handlers ***/
4434 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
4435 Check if a text is encoded in a coding system of which
4436 encoder/decoder are written in CCL program. If it is, return
4437 CATEGORY_MASK_CCL, else return 0. */
4440 detect_coding_ccl (coding
, detect_info
)
4441 struct coding_system
*coding
;
4442 struct coding_detection_info
*detect_info
;
4444 const unsigned char *src
= coding
->source
, *src_base
;
4445 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4446 int multibytep
= coding
->src_multibyte
;
4447 int consumed_chars
= 0;
4449 unsigned char *valids
;
4450 int head_ascii
= coding
->head_ascii
;
4453 detect_info
->checked
|= CATEGORY_MASK_CCL
;
4455 coding
= &coding_categories
[coding_category_ccl
];
4456 valids
= CODING_CCL_VALIDS (coding
);
4457 attrs
= CODING_ID_ATTRS (coding
->id
);
4458 if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
4467 if (c
< 0 || ! valids
[c
])
4469 if ((valids
[c
] > 1))
4470 found
= CATEGORY_MASK_CCL
;
4472 detect_info
->rejected
|= CATEGORY_MASK_CCL
;
4476 detect_info
->found
|= found
;
4481 decode_coding_ccl (coding
)
4482 struct coding_system
*coding
;
4484 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4485 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4486 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4487 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_size
;
4488 int consumed_chars
= 0;
4489 int multibytep
= coding
->src_multibyte
;
4490 struct ccl_program ccl
;
4491 int source_charbuf
[1024];
4492 int source_byteidx
[1024];
4493 Lisp_Object attrs
, charset_list
;
4495 CODING_GET_INFO (coding
, attrs
, charset_list
);
4496 setup_ccl_program (&ccl
, CODING_CCL_DECODER (coding
));
4498 while (src
< src_end
)
4500 const unsigned char *p
= src
;
4501 int *source
, *source_end
;
4505 while (i
< 1024 && p
< src_end
)
4507 source_byteidx
[i
] = p
- src
;
4508 source_charbuf
[i
++] = STRING_CHAR_ADVANCE (p
);
4511 while (i
< 1024 && p
< src_end
)
4512 source_charbuf
[i
++] = *p
++;
4514 if (p
== src_end
&& coding
->mode
& CODING_MODE_LAST_BLOCK
)
4517 source
= source_charbuf
;
4518 source_end
= source
+ i
;
4519 while (source
< source_end
)
4521 ccl_driver (&ccl
, source
, charbuf
,
4522 source_end
- source
, charbuf_end
- charbuf
,
4524 source
+= ccl
.consumed
;
4525 charbuf
+= ccl
.produced
;
4526 if (ccl
.status
!= CCL_STAT_SUSPEND_BY_DST
)
4529 if (source
< source_end
)
4530 src
+= source_byteidx
[source
- source_charbuf
];
4533 consumed_chars
+= source
- source_charbuf
;
4535 if (ccl
.status
!= CCL_STAT_SUSPEND_BY_SRC
4536 && ccl
.status
!= CODING_RESULT_INSUFFICIENT_SRC
)
4542 case CCL_STAT_SUSPEND_BY_SRC
:
4543 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
4545 case CCL_STAT_SUSPEND_BY_DST
:
4548 case CCL_STAT_INVALID_CMD
:
4549 record_conversion_result (coding
, CODING_RESULT_INTERRUPT
);
4552 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4555 coding
->consumed_char
+= consumed_chars
;
4556 coding
->consumed
= src
- coding
->source
;
4557 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4561 encode_coding_ccl (coding
)
4562 struct coding_system
*coding
;
4564 struct ccl_program ccl
;
4565 int multibytep
= coding
->dst_multibyte
;
4566 int *charbuf
= coding
->charbuf
;
4567 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4568 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4569 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4570 int destination_charbuf
[1024];
4571 int i
, produced_chars
= 0;
4572 Lisp_Object attrs
, charset_list
;
4574 CODING_GET_INFO (coding
, attrs
, charset_list
);
4575 setup_ccl_program (&ccl
, CODING_CCL_ENCODER (coding
));
4577 ccl
.last_block
= coding
->mode
& CODING_MODE_LAST_BLOCK
;
4578 ccl
.dst_multibyte
= coding
->dst_multibyte
;
4580 while (charbuf
< charbuf_end
)
4582 ccl_driver (&ccl
, charbuf
, destination_charbuf
,
4583 charbuf_end
- charbuf
, 1024, charset_list
);
4586 ASSURE_DESTINATION (ccl
.produced
* 2);
4587 for (i
= 0; i
< ccl
.produced
; i
++)
4588 EMIT_ONE_BYTE (destination_charbuf
[i
] & 0xFF);
4592 ASSURE_DESTINATION (ccl
.produced
);
4593 for (i
= 0; i
< ccl
.produced
; i
++)
4594 *dst
++ = destination_charbuf
[i
] & 0xFF;
4595 produced_chars
+= ccl
.produced
;
4597 charbuf
+= ccl
.consumed
;
4598 if (ccl
.status
== CCL_STAT_QUIT
4599 || ccl
.status
== CCL_STAT_INVALID_CMD
)
4605 case CCL_STAT_SUSPEND_BY_SRC
:
4606 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
4608 case CCL_STAT_SUSPEND_BY_DST
:
4609 record_conversion_result (coding
, CODING_RESULT_INSUFFICIENT_DST
);
4612 case CCL_STAT_INVALID_CMD
:
4613 record_conversion_result (coding
, CODING_RESULT_INTERRUPT
);
4616 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4620 coding
->produced_char
+= produced_chars
;
4621 coding
->produced
= dst
- coding
->destination
;
4627 /*** 10, 11. no-conversion handlers ***/
4629 /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
4632 decode_coding_raw_text (coding
)
4633 struct coding_system
*coding
;
4635 coding
->chars_at_source
= 1;
4636 coding
->consumed_char
= 0;
4637 coding
->consumed
= 0;
4638 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4642 encode_coding_raw_text (coding
)
4643 struct coding_system
*coding
;
4645 int multibytep
= coding
->dst_multibyte
;
4646 int *charbuf
= coding
->charbuf
;
4647 int *charbuf_end
= coding
->charbuf
+ coding
->charbuf_used
;
4648 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4649 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4650 int produced_chars
= 0;
4655 int safe_room
= MAX_MULTIBYTE_LENGTH
* 2;
4657 if (coding
->src_multibyte
)
4658 while (charbuf
< charbuf_end
)
4660 ASSURE_DESTINATION (safe_room
);
4662 if (ASCII_CHAR_P (c
))
4663 EMIT_ONE_ASCII_BYTE (c
);
4664 else if (CHAR_BYTE8_P (c
))
4666 c
= CHAR_TO_BYTE8 (c
);
4671 unsigned char str
[MAX_MULTIBYTE_LENGTH
], *p0
= str
, *p1
= str
;
4673 CHAR_STRING_ADVANCE (c
, p1
);
4676 EMIT_ONE_BYTE (*p0
);
4682 while (charbuf
< charbuf_end
)
4684 ASSURE_DESTINATION (safe_room
);
4691 if (coding
->src_multibyte
)
4693 int safe_room
= MAX_MULTIBYTE_LENGTH
;
4695 while (charbuf
< charbuf_end
)
4697 ASSURE_DESTINATION (safe_room
);
4699 if (ASCII_CHAR_P (c
))
4701 else if (CHAR_BYTE8_P (c
))
4702 *dst
++ = CHAR_TO_BYTE8 (c
);
4704 CHAR_STRING_ADVANCE (c
, dst
);
4710 ASSURE_DESTINATION (charbuf_end
- charbuf
);
4711 while (charbuf
< charbuf_end
&& dst
< dst_end
)
4712 *dst
++ = *charbuf
++;
4713 produced_chars
= dst
- (coding
->destination
+ coding
->dst_bytes
);
4716 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4717 coding
->produced_char
+= produced_chars
;
4718 coding
->produced
= dst
- coding
->destination
;
4722 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
4723 Check if a text is encoded in a charset-based coding system. If it
4724 is, return 1, else return 0. */
4727 detect_coding_charset (coding
, detect_info
)
4728 struct coding_system
*coding
;
4729 struct coding_detection_info
*detect_info
;
4731 const unsigned char *src
= coding
->source
, *src_base
;
4732 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4733 int multibytep
= coding
->src_multibyte
;
4734 int consumed_chars
= 0;
4735 Lisp_Object attrs
, valids
;
4737 int head_ascii
= coding
->head_ascii
;
4739 detect_info
->checked
|= CATEGORY_MASK_CHARSET
;
4741 coding
= &coding_categories
[coding_category_charset
];
4742 attrs
= CODING_ID_ATTRS (coding
->id
);
4743 valids
= AREF (attrs
, coding_attr_charset_valids
);
4745 if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
4752 struct charset
*charset
;
4759 val
= AREF (valids
, c
);
4763 found
= CATEGORY_MASK_CHARSET
;
4766 charset
= CHARSET_FROM_ID (XFASTINT (val
));
4767 dim
= CHARSET_DIMENSION (charset
);
4768 for (idx
= 1; idx
< dim
; idx
++)
4773 if (c
< charset
->code_space
[(dim
- 1 - idx
) * 2]
4774 || c
> charset
->code_space
[(dim
- 1 - idx
) * 2 + 1])
4783 for (; CONSP (val
); val
= XCDR (val
))
4785 charset
= CHARSET_FROM_ID (XFASTINT (XCAR (val
)));
4786 dim
= CHARSET_DIMENSION (charset
);
4792 if (c
< charset
->code_space
[(dim
- 1 - idx
) * 4]
4793 || c
> charset
->code_space
[(dim
- 1 - idx
) * 4 + 1])
4808 detect_info
->rejected
|= CATEGORY_MASK_CHARSET
;
4812 detect_info
->found
|= found
;
4817 decode_coding_charset (coding
)
4818 struct coding_system
*coding
;
4820 const unsigned char *src
= coding
->source
+ coding
->consumed
;
4821 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
4822 const unsigned char *src_base
;
4823 int *charbuf
= coding
->charbuf
+ coding
->charbuf_used
;
4825 = coding
->charbuf
+ coding
->charbuf_size
- MAX_ANNOTATION_LENGTH
;
4826 int consumed_chars
= 0, consumed_chars_base
;
4827 int multibytep
= coding
->src_multibyte
;
4828 Lisp_Object attrs
, charset_list
, valids
;
4829 int char_offset
= coding
->produced_char
;
4830 int last_offset
= char_offset
;
4831 int last_id
= charset_ascii
;
4833 CODING_GET_INFO (coding
, attrs
, charset_list
);
4834 valids
= AREF (attrs
, coding_attr_charset_valids
);
4840 struct charset
*charset
;
4846 consumed_chars_base
= consumed_chars
;
4848 if (charbuf
>= charbuf_end
)
4856 val
= AREF (valids
, c
);
4861 charset
= CHARSET_FROM_ID (XFASTINT (val
));
4862 dim
= CHARSET_DIMENSION (charset
);
4866 code
= (code
<< 8) | c
;
4869 CODING_DECODE_CHAR (coding
, src
, src_base
, src_end
,
4874 /* VAL is a list of charset IDs. It is assured that the
4875 list is sorted by charset dimensions (smaller one
4879 charset
= CHARSET_FROM_ID (XFASTINT (XCAR (val
)));
4880 dim
= CHARSET_DIMENSION (charset
);
4884 code
= (code
<< 8) | c
;
4887 CODING_DECODE_CHAR (coding
, src
, src_base
,
4888 src_end
, charset
, code
, c
);
4896 if (charset
->id
!= charset_ascii
4897 && last_id
!= charset
->id
)
4899 if (last_id
!= charset_ascii
)
4900 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4901 last_id
= charset
->id
;
4902 last_offset
= char_offset
;
4911 consumed_chars
= consumed_chars_base
;
4913 *charbuf
++ = c
< 0 ? -c
: ASCII_BYTE_P (c
) ? c
: BYTE8_TO_CHAR (c
);
4919 if (last_id
!= charset_ascii
)
4920 ADD_CHARSET_DATA (charbuf
, char_offset
- last_offset
, last_id
);
4921 coding
->consumed_char
+= consumed_chars_base
;
4922 coding
->consumed
= src_base
- coding
->source
;
4923 coding
->charbuf_used
= charbuf
- coding
->charbuf
;
4927 encode_coding_charset (coding
)
4928 struct coding_system
*coding
;
4930 int multibytep
= coding
->dst_multibyte
;
4931 int *charbuf
= coding
->charbuf
;
4932 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
4933 unsigned char *dst
= coding
->destination
+ coding
->produced
;
4934 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
4935 int safe_room
= MAX_MULTIBYTE_LENGTH
;
4936 int produced_chars
= 0;
4937 Lisp_Object attrs
, charset_list
;
4938 int ascii_compatible
;
4941 CODING_GET_INFO (coding
, attrs
, charset_list
);
4942 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
4944 while (charbuf
< charbuf_end
)
4946 struct charset
*charset
;
4949 ASSURE_DESTINATION (safe_room
);
4951 if (ascii_compatible
&& ASCII_CHAR_P (c
))
4952 EMIT_ONE_ASCII_BYTE (c
);
4953 else if (CHAR_BYTE8_P (c
))
4955 c
= CHAR_TO_BYTE8 (c
);
4960 charset
= char_charset (c
, charset_list
, &code
);
4963 if (CHARSET_DIMENSION (charset
) == 1)
4964 EMIT_ONE_BYTE (code
);
4965 else if (CHARSET_DIMENSION (charset
) == 2)
4966 EMIT_TWO_BYTES (code
>> 8, code
& 0xFF);
4967 else if (CHARSET_DIMENSION (charset
) == 3)
4968 EMIT_THREE_BYTES (code
>> 16, (code
>> 8) & 0xFF, code
& 0xFF);
4970 EMIT_FOUR_BYTES (code
>> 24, (code
>> 16) & 0xFF,
4971 (code
>> 8) & 0xFF, code
& 0xFF);
4975 if (coding
->mode
& CODING_MODE_SAFE_ENCODING
)
4976 c
= CODING_INHIBIT_CHARACTER_SUBSTITUTION
;
4978 c
= coding
->default_char
;
4984 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
4985 coding
->produced_char
+= produced_chars
;
4986 coding
->produced
= dst
- coding
->destination
;
4991 /*** 7. C library functions ***/
4993 /* Setup coding context CODING from information about CODING_SYSTEM.
4994 If CODING_SYSTEM is nil, `no-conversion' is assumed. If
4995 CODING_SYSTEM is invalid, signal an error. */
4998 setup_coding_system (coding_system
, coding
)
4999 Lisp_Object coding_system
;
5000 struct coding_system
*coding
;
5003 Lisp_Object eol_type
;
5004 Lisp_Object coding_type
;
5007 if (NILP (coding_system
))
5008 coding_system
= Qundecided
;
5010 CHECK_CODING_SYSTEM_GET_ID (coding_system
, coding
->id
);
5012 attrs
= CODING_ID_ATTRS (coding
->id
);
5013 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
5016 coding
->head_ascii
= -1;
5017 if (VECTORP (eol_type
))
5018 coding
->common_flags
= (CODING_REQUIRE_DECODING_MASK
5019 | CODING_REQUIRE_DETECTION_MASK
);
5020 else if (! EQ (eol_type
, Qunix
))
5021 coding
->common_flags
= (CODING_REQUIRE_DECODING_MASK
5022 | CODING_REQUIRE_ENCODING_MASK
);
5024 coding
->common_flags
= 0;
5025 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
5026 coding
->common_flags
|= CODING_REQUIRE_DECODING_MASK
;
5027 if (! NILP (CODING_ATTR_PRE_WRITE (attrs
)))
5028 coding
->common_flags
|= CODING_REQUIRE_ENCODING_MASK
;
5029 if (! NILP (CODING_ATTR_FOR_UNIBYTE (attrs
)))
5030 coding
->common_flags
|= CODING_FOR_UNIBYTE_MASK
;
5032 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
5033 coding
->max_charset_id
= SCHARS (val
) - 1;
5034 coding
->safe_charsets
= (char *) SDATA (val
);
5035 coding
->default_char
= XINT (CODING_ATTR_DEFAULT_CHAR (attrs
));
5037 coding_type
= CODING_ATTR_TYPE (attrs
);
5038 if (EQ (coding_type
, Qundecided
))
5040 coding
->detector
= NULL
;
5041 coding
->decoder
= decode_coding_raw_text
;
5042 coding
->encoder
= encode_coding_raw_text
;
5043 coding
->common_flags
|= CODING_REQUIRE_DETECTION_MASK
;
5045 else if (EQ (coding_type
, Qiso_2022
))
5048 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
5050 /* Invoke graphic register 0 to plane 0. */
5051 CODING_ISO_INVOCATION (coding
, 0) = 0;
5052 /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */
5053 CODING_ISO_INVOCATION (coding
, 1)
5054 = (flags
& CODING_ISO_FLAG_SEVEN_BITS
? -1 : 1);
5055 /* Setup the initial status of designation. */
5056 for (i
= 0; i
< 4; i
++)
5057 CODING_ISO_DESIGNATION (coding
, i
) = CODING_ISO_INITIAL (coding
, i
);
5058 /* Not single shifting initially. */
5059 CODING_ISO_SINGLE_SHIFTING (coding
) = 0;
5060 /* Beginning of buffer should also be regarded as bol. */
5061 CODING_ISO_BOL (coding
) = 1;
5062 coding
->detector
= detect_coding_iso_2022
;
5063 coding
->decoder
= decode_coding_iso_2022
;
5064 coding
->encoder
= encode_coding_iso_2022
;
5065 if (flags
& CODING_ISO_FLAG_SAFE
)
5066 coding
->mode
|= CODING_MODE_SAFE_ENCODING
;
5067 coding
->common_flags
5068 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
5069 | CODING_REQUIRE_FLUSHING_MASK
);
5070 if (flags
& CODING_ISO_FLAG_COMPOSITION
)
5071 coding
->common_flags
|= CODING_ANNOTATE_COMPOSITION_MASK
;
5072 if (flags
& CODING_ISO_FLAG_DESIGNATION
)
5073 coding
->common_flags
|= CODING_ANNOTATE_CHARSET_MASK
;
5074 if (flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
5076 setup_iso_safe_charsets (attrs
);
5077 val
= CODING_ATTR_SAFE_CHARSETS (attrs
);
5078 coding
->max_charset_id
= SCHARS (val
) - 1;
5079 coding
->safe_charsets
= (char *) SDATA (val
);
5081 CODING_ISO_FLAGS (coding
) = flags
;
5083 else if (EQ (coding_type
, Qcharset
))
5085 coding
->detector
= detect_coding_charset
;
5086 coding
->decoder
= decode_coding_charset
;
5087 coding
->encoder
= encode_coding_charset
;
5088 coding
->common_flags
5089 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5091 else if (EQ (coding_type
, Qutf_8
))
5093 coding
->detector
= detect_coding_utf_8
;
5094 coding
->decoder
= decode_coding_utf_8
;
5095 coding
->encoder
= encode_coding_utf_8
;
5096 coding
->common_flags
5097 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5099 else if (EQ (coding_type
, Qutf_16
))
5101 val
= AREF (attrs
, coding_attr_utf_16_bom
);
5102 CODING_UTF_16_BOM (coding
) = (CONSP (val
) ? utf_16_detect_bom
5103 : EQ (val
, Qt
) ? utf_16_with_bom
5104 : utf_16_without_bom
);
5105 val
= AREF (attrs
, coding_attr_utf_16_endian
);
5106 CODING_UTF_16_ENDIAN (coding
) = (EQ (val
, Qbig
) ? utf_16_big_endian
5107 : utf_16_little_endian
);
5108 CODING_UTF_16_SURROGATE (coding
) = 0;
5109 coding
->detector
= detect_coding_utf_16
;
5110 coding
->decoder
= decode_coding_utf_16
;
5111 coding
->encoder
= encode_coding_utf_16
;
5112 coding
->common_flags
5113 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5114 if (CODING_UTF_16_BOM (coding
) == utf_16_detect_bom
)
5115 coding
->common_flags
|= CODING_REQUIRE_DETECTION_MASK
;
5117 else if (EQ (coding_type
, Qccl
))
5119 coding
->detector
= detect_coding_ccl
;
5120 coding
->decoder
= decode_coding_ccl
;
5121 coding
->encoder
= encode_coding_ccl
;
5122 coding
->common_flags
5123 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
5124 | CODING_REQUIRE_FLUSHING_MASK
);
5126 else if (EQ (coding_type
, Qemacs_mule
))
5128 coding
->detector
= detect_coding_emacs_mule
;
5129 coding
->decoder
= decode_coding_emacs_mule
;
5130 coding
->encoder
= encode_coding_emacs_mule
;
5131 coding
->common_flags
5132 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5133 if (! NILP (AREF (attrs
, coding_attr_emacs_mule_full
))
5134 && ! EQ (CODING_ATTR_CHARSET_LIST (attrs
), Vemacs_mule_charset_list
))
5136 Lisp_Object tail
, safe_charsets
;
5137 int max_charset_id
= 0;
5139 for (tail
= Vemacs_mule_charset_list
; CONSP (tail
);
5141 if (max_charset_id
< XFASTINT (XCAR (tail
)))
5142 max_charset_id
= XFASTINT (XCAR (tail
));
5143 safe_charsets
= Fmake_string (make_number (max_charset_id
+ 1),
5145 for (tail
= Vemacs_mule_charset_list
; CONSP (tail
);
5147 SSET (safe_charsets
, XFASTINT (XCAR (tail
)), 0);
5148 coding
->max_charset_id
= max_charset_id
;
5149 coding
->safe_charsets
= (char *) SDATA (safe_charsets
);
5152 else if (EQ (coding_type
, Qshift_jis
))
5154 coding
->detector
= detect_coding_sjis
;
5155 coding
->decoder
= decode_coding_sjis
;
5156 coding
->encoder
= encode_coding_sjis
;
5157 coding
->common_flags
5158 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5160 else if (EQ (coding_type
, Qbig5
))
5162 coding
->detector
= detect_coding_big5
;
5163 coding
->decoder
= decode_coding_big5
;
5164 coding
->encoder
= encode_coding_big5
;
5165 coding
->common_flags
5166 |= (CODING_REQUIRE_DECODING_MASK
| CODING_REQUIRE_ENCODING_MASK
);
5168 else /* EQ (coding_type, Qraw_text) */
5170 coding
->detector
= NULL
;
5171 coding
->decoder
= decode_coding_raw_text
;
5172 coding
->encoder
= encode_coding_raw_text
;
5173 if (! EQ (eol_type
, Qunix
))
5175 coding
->common_flags
|= CODING_REQUIRE_DECODING_MASK
;
5176 if (! VECTORP (eol_type
))
5177 coding
->common_flags
|= CODING_REQUIRE_ENCODING_MASK
;
5185 /* Return a list of charsets supported by CODING. */
5188 coding_charset_list (coding
)
5189 struct coding_system
*coding
;
5191 Lisp_Object attrs
, charset_list
;
5193 CODING_GET_INFO (coding
, attrs
, charset_list
);
5194 if (EQ (CODING_ATTR_TYPE (attrs
), Qiso_2022
))
5196 int flags
= XINT (AREF (attrs
, coding_attr_iso_flags
));
5198 if (flags
& CODING_ISO_FLAG_FULL_SUPPORT
)
5199 charset_list
= Viso_2022_charset_list
;
5201 else if (EQ (CODING_ATTR_TYPE (attrs
), Qemacs_mule
))
5203 charset_list
= Vemacs_mule_charset_list
;
5205 return charset_list
;
5209 /* Return raw-text or one of its subsidiaries that has the same
5210 eol_type as CODING-SYSTEM. */
5213 raw_text_coding_system (coding_system
)
5214 Lisp_Object coding_system
;
5216 Lisp_Object spec
, attrs
;
5217 Lisp_Object eol_type
, raw_text_eol_type
;
5219 if (NILP (coding_system
))
5221 spec
= CODING_SYSTEM_SPEC (coding_system
);
5222 attrs
= AREF (spec
, 0);
5224 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
5225 return coding_system
;
5227 eol_type
= AREF (spec
, 2);
5228 if (VECTORP (eol_type
))
5230 spec
= CODING_SYSTEM_SPEC (Qraw_text
);
5231 raw_text_eol_type
= AREF (spec
, 2);
5232 return (EQ (eol_type
, Qunix
) ? AREF (raw_text_eol_type
, 0)
5233 : EQ (eol_type
, Qdos
) ? AREF (raw_text_eol_type
, 1)
5234 : AREF (raw_text_eol_type
, 2));
5238 /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT
5239 does, return one of the subsidiary that has the same eol-spec as
5240 PARENT. Otherwise, return CODING_SYSTEM. If PARENT is nil,
5241 inherit end-of-line format from the system's setting
5242 (system_eol_type). */
5245 coding_inherit_eol_type (coding_system
, parent
)
5246 Lisp_Object coding_system
, parent
;
5248 Lisp_Object spec
, eol_type
;
5250 if (NILP (coding_system
))
5251 coding_system
= Qraw_text
;
5252 spec
= CODING_SYSTEM_SPEC (coding_system
);
5253 eol_type
= AREF (spec
, 2);
5254 if (VECTORP (eol_type
))
5256 Lisp_Object parent_eol_type
;
5258 if (! NILP (parent
))
5260 Lisp_Object parent_spec
;
5262 parent_spec
= CODING_SYSTEM_SPEC (parent
);
5263 parent_eol_type
= AREF (parent_spec
, 2);
5266 parent_eol_type
= system_eol_type
;
5267 if (EQ (parent_eol_type
, Qunix
))
5268 coding_system
= AREF (eol_type
, 0);
5269 else if (EQ (parent_eol_type
, Qdos
))
5270 coding_system
= AREF (eol_type
, 1);
5271 else if (EQ (parent_eol_type
, Qmac
))
5272 coding_system
= AREF (eol_type
, 2);
5274 return coding_system
;
5277 /* Emacs has a mechanism to automatically detect a coding system if it
5278 is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But,
5279 it's impossible to distinguish some coding systems accurately
5280 because they use the same range of codes. So, at first, coding
5281 systems are categorized into 7, those are:
5283 o coding-category-emacs-mule
5285 The category for a coding system which has the same code range
5286 as Emacs' internal format. Assigned the coding-system (Lisp
5287 symbol) `emacs-mule' by default.
5289 o coding-category-sjis
5291 The category for a coding system which has the same code range
5292 as SJIS. Assigned the coding-system (Lisp
5293 symbol) `japanese-shift-jis' by default.
5295 o coding-category-iso-7
5297 The category for a coding system which has the same code range
5298 as ISO2022 of 7-bit environment. This doesn't use any locking
5299 shift and single shift functions. This can encode/decode all
5300 charsets. Assigned the coding-system (Lisp symbol)
5301 `iso-2022-7bit' by default.
5303 o coding-category-iso-7-tight
5305 Same as coding-category-iso-7 except that this can
5306 encode/decode only the specified charsets.
5308 o coding-category-iso-8-1
5310 The category for a coding system which has the same code range
5311 as ISO2022 of 8-bit environment and graphic plane 1 used only
5312 for DIMENSION1 charset. This doesn't use any locking shift
5313 and single shift functions. Assigned the coding-system (Lisp
5314 symbol) `iso-latin-1' by default.
5316 o coding-category-iso-8-2
5318 The category for a coding system which has the same code range
5319 as ISO2022 of 8-bit environment and graphic plane 1 used only
5320 for DIMENSION2 charset. This doesn't use any locking shift
5321 and single shift functions. Assigned the coding-system (Lisp
5322 symbol) `japanese-iso-8bit' by default.
5324 o coding-category-iso-7-else
5326 The category for a coding system which has the same code range
5327 as ISO2022 of 7-bit environemnt but uses locking shift or
5328 single shift functions. Assigned the coding-system (Lisp
5329 symbol) `iso-2022-7bit-lock' by default.
5331 o coding-category-iso-8-else
5333 The category for a coding system which has the same code range
5334 as ISO2022 of 8-bit environemnt but uses locking shift or
5335 single shift functions. Assigned the coding-system (Lisp
5336 symbol) `iso-2022-8bit-ss2' by default.
5338 o coding-category-big5
5340 The category for a coding system which has the same code range
5341 as BIG5. Assigned the coding-system (Lisp symbol)
5342 `cn-big5' by default.
5344 o coding-category-utf-8
5346 The category for a coding system which has the same code range
5347 as UTF-8 (cf. RFC3629). Assigned the coding-system (Lisp
5348 symbol) `utf-8' by default.
5350 o coding-category-utf-16-be
5352 The category for a coding system in which a text has an
5353 Unicode signature (cf. Unicode Standard) in the order of BIG
5354 endian at the head. Assigned the coding-system (Lisp symbol)
5355 `utf-16-be' by default.
5357 o coding-category-utf-16-le
5359 The category for a coding system in which a text has an
5360 Unicode signature (cf. Unicode Standard) in the order of
5361 LITTLE endian at the head. Assigned the coding-system (Lisp
5362 symbol) `utf-16-le' by default.
5364 o coding-category-ccl
5366 The category for a coding system of which encoder/decoder is
5367 written in CCL programs. The default value is nil, i.e., no
5368 coding system is assigned.
5370 o coding-category-binary
5372 The category for a coding system not categorized in any of the
5373 above. Assigned the coding-system (Lisp symbol)
5374 `no-conversion' by default.
5376 Each of them is a Lisp symbol and the value is an actual
5377 `coding-system's (this is also a Lisp symbol) assigned by a user.
5378 What Emacs does actually is to detect a category of coding system.
5379 Then, it uses a `coding-system' assigned to it. If Emacs can't
5380 decide only one possible category, it selects a category of the
5381 highest priority. Priorities of categories are also specified by a
5382 user in a Lisp variable `coding-category-list'.
5386 #define EOL_SEEN_NONE 0
5387 #define EOL_SEEN_LF 1
5388 #define EOL_SEEN_CR 2
5389 #define EOL_SEEN_CRLF 4
5391 /* Detect how end-of-line of a text of length SRC_BYTES pointed by
5392 SOURCE is encoded. If CATEGORY is one of
5393 coding_category_utf_16_XXXX, assume that CR and LF are encoded by
5394 two-byte, else they are encoded by one-byte.
5396 Return one of EOL_SEEN_XXX. */
5398 #define MAX_EOL_CHECK_COUNT 3
5401 detect_eol (source
, src_bytes
, category
)
5402 const unsigned char *source
;
5403 EMACS_INT src_bytes
;
5404 enum coding_category category
;
5406 const unsigned char *src
= source
, *src_end
= src
+ src_bytes
;
5409 int eol_seen
= EOL_SEEN_NONE
;
5411 if ((1 << category
) & CATEGORY_MASK_UTF_16
)
5415 msb
= category
== (coding_category_utf_16_le
5416 | coding_category_utf_16_le_nosig
);
5419 while (src
+ 1 < src_end
)
5422 if (src
[msb
] == 0 && (c
== '\n' || c
== '\r'))
5427 this_eol
= EOL_SEEN_LF
;
5428 else if (src
+ 3 >= src_end
5429 || src
[msb
+ 2] != 0
5430 || src
[lsb
+ 2] != '\n')
5431 this_eol
= EOL_SEEN_CR
;
5433 this_eol
= EOL_SEEN_CRLF
;
5435 if (eol_seen
== EOL_SEEN_NONE
)
5436 /* This is the first end-of-line. */
5437 eol_seen
= this_eol
;
5438 else if (eol_seen
!= this_eol
)
5440 /* The found type is different from what found before. */
5441 eol_seen
= EOL_SEEN_LF
;
5444 if (++total
== MAX_EOL_CHECK_COUNT
)
5452 while (src
< src_end
)
5455 if (c
== '\n' || c
== '\r')
5460 this_eol
= EOL_SEEN_LF
;
5461 else if (src
>= src_end
|| *src
!= '\n')
5462 this_eol
= EOL_SEEN_CR
;
5464 this_eol
= EOL_SEEN_CRLF
, src
++;
5466 if (eol_seen
== EOL_SEEN_NONE
)
5467 /* This is the first end-of-line. */
5468 eol_seen
= this_eol
;
5469 else if (eol_seen
!= this_eol
)
5471 /* The found type is different from what found before. */
5472 eol_seen
= EOL_SEEN_LF
;
5475 if (++total
== MAX_EOL_CHECK_COUNT
)
5485 adjust_coding_eol_type (coding
, eol_seen
)
5486 struct coding_system
*coding
;
5489 Lisp_Object eol_type
;
5491 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
5492 if (eol_seen
& EOL_SEEN_LF
)
5494 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 0));
5497 else if (eol_seen
& EOL_SEEN_CRLF
)
5499 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 1));
5502 else if (eol_seen
& EOL_SEEN_CR
)
5504 coding
->id
= CODING_SYSTEM_ID (AREF (eol_type
, 2));
5510 /* Detect how a text specified in CODING is encoded. If a coding
5511 system is detected, update fields of CODING by the detected coding
5515 detect_coding (coding
)
5516 struct coding_system
*coding
;
5518 const unsigned char *src
, *src_end
;
5520 coding
->consumed
= coding
->consumed_char
= 0;
5521 coding
->produced
= coding
->produced_char
= 0;
5522 coding_set_source (coding
);
5524 src_end
= coding
->source
+ coding
->src_bytes
;
5526 /* If we have not yet decided the text encoding type, detect it
5528 if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding
->id
)), Qundecided
))
5531 struct coding_detection_info detect_info
;
5533 detect_info
.checked
= detect_info
.found
= detect_info
.rejected
= 0;
5534 for (i
= 0, src
= coding
->source
; src
< src_end
; i
++, src
++)
5540 && (c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
)
5541 && ! inhibit_iso_escape_detection
5542 && ! detect_info
.checked
)
5544 coding
->head_ascii
= src
- (coding
->source
+ coding
->consumed
);
5545 if (detect_coding_iso_2022 (coding
, &detect_info
))
5547 /* We have scanned the whole data. */
5548 if (! (detect_info
.rejected
& CATEGORY_MASK_ISO_7_ELSE
))
5549 /* We didn't find an 8-bit code. */
5555 coding
->head_ascii
= src
- (coding
->source
+ coding
->consumed
);
5557 if (coding
->head_ascii
< coding
->src_bytes
5558 || detect_info
.found
)
5560 enum coding_category category
;
5561 struct coding_system
*this;
5563 if (coding
->head_ascii
== coding
->src_bytes
)
5564 /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */
5565 for (i
= 0; i
< coding_category_raw_text
; i
++)
5567 category
= coding_priorities
[i
];
5568 this = coding_categories
+ category
;
5569 if (detect_info
.found
& (1 << category
))
5573 for (i
= 0; i
< coding_category_raw_text
; i
++)
5575 category
= coding_priorities
[i
];
5576 this = coding_categories
+ category
;
5579 /* No coding system of this category is defined. */
5580 detect_info
.rejected
|= (1 << category
);
5582 else if (category
>= coding_category_raw_text
)
5584 else if (detect_info
.checked
& (1 << category
))
5586 if (detect_info
.found
& (1 << category
))
5589 else if ((*(this->detector
)) (coding
, &detect_info
)
5590 && detect_info
.found
& (1 << category
))
5592 if (category
== coding_category_utf_16_auto
)
5594 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
5595 category
= coding_category_utf_16_le
;
5597 category
= coding_category_utf_16_be
;
5603 if (i
< coding_category_raw_text
)
5604 setup_coding_system (CODING_ID_NAME (this->id
), coding
);
5605 else if (detect_info
.rejected
== CATEGORY_MASK_ANY
)
5606 setup_coding_system (Qraw_text
, coding
);
5607 else if (detect_info
.rejected
)
5608 for (i
= 0; i
< coding_category_raw_text
; i
++)
5609 if (! (detect_info
.rejected
& (1 << coding_priorities
[i
])))
5611 this = coding_categories
+ coding_priorities
[i
];
5612 setup_coding_system (CODING_ID_NAME (this->id
), coding
);
5617 else if (XINT (CODING_ATTR_CATEGORY (CODING_ID_ATTRS (coding
->id
)))
5618 == coding_category_utf_16_auto
)
5620 Lisp_Object coding_systems
;
5621 struct coding_detection_info detect_info
;
5624 = AREF (CODING_ID_ATTRS (coding
->id
), coding_attr_utf_16_bom
);
5625 detect_info
.found
= detect_info
.rejected
= 0;
5626 if (CONSP (coding_systems
)
5627 && detect_coding_utf_16 (coding
, &detect_info
))
5629 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
5630 setup_coding_system (XCAR (coding_systems
), coding
);
5631 else if (detect_info
.found
& CATEGORY_MASK_UTF_16_BE
)
5632 setup_coding_system (XCDR (coding_systems
), coding
);
5640 struct coding_system
*coding
;
5642 Lisp_Object eol_type
;
5643 unsigned char *p
, *pbeg
, *pend
;
5645 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
5646 if (EQ (eol_type
, Qunix
))
5649 if (NILP (coding
->dst_object
))
5650 pbeg
= coding
->destination
;
5652 pbeg
= BYTE_POS_ADDR (coding
->dst_pos_byte
);
5653 pend
= pbeg
+ coding
->produced
;
5655 if (VECTORP (eol_type
))
5657 int eol_seen
= EOL_SEEN_NONE
;
5659 for (p
= pbeg
; p
< pend
; p
++)
5662 eol_seen
|= EOL_SEEN_LF
;
5663 else if (*p
== '\r')
5665 if (p
+ 1 < pend
&& *(p
+ 1) == '\n')
5667 eol_seen
|= EOL_SEEN_CRLF
;
5671 eol_seen
|= EOL_SEEN_CR
;
5674 if (eol_seen
!= EOL_SEEN_NONE
5675 && eol_seen
!= EOL_SEEN_LF
5676 && eol_seen
!= EOL_SEEN_CRLF
5677 && eol_seen
!= EOL_SEEN_CR
)
5678 eol_seen
= EOL_SEEN_LF
;
5679 if (eol_seen
!= EOL_SEEN_NONE
)
5680 eol_type
= adjust_coding_eol_type (coding
, eol_seen
);
5683 if (EQ (eol_type
, Qmac
))
5685 for (p
= pbeg
; p
< pend
; p
++)
5689 else if (EQ (eol_type
, Qdos
))
5693 if (NILP (coding
->dst_object
))
5695 /* Start deleting '\r' from the tail to minimize the memory
5697 for (p
= pend
- 2; p
>= pbeg
; p
--)
5700 safe_bcopy ((char *) (p
+ 1), (char *) p
, pend
-- - p
- 1);
5706 int pos_byte
= coding
->dst_pos_byte
;
5707 int pos
= coding
->dst_pos
;
5708 int pos_end
= pos
+ coding
->produced_char
- 1;
5710 while (pos
< pos_end
)
5712 p
= BYTE_POS_ADDR (pos_byte
);
5713 if (*p
== '\r' && p
[1] == '\n')
5715 del_range_2 (pos
, pos_byte
, pos
+ 1, pos_byte
+ 1, 0);
5720 pos_byte
+= BYTES_BY_CHAR_HEAD (*p
);
5723 coding
->produced
-= n
;
5724 coding
->produced_char
-= n
;
5729 /* Return a translation table (or list of them) from coding system
5730 attribute vector ATTRS for encoding (ENCODEP is nonzero) or
5731 decoding (ENCODEP is zero). */
5734 get_translation_table (attrs
, encodep
, max_lookup
)
5736 int encodep
, *max_lookup
;
5738 Lisp_Object standard
, translation_table
;
5742 translation_table
= CODING_ATTR_ENCODE_TBL (attrs
),
5743 standard
= Vstandard_translation_table_for_encode
;
5745 translation_table
= CODING_ATTR_DECODE_TBL (attrs
),
5746 standard
= Vstandard_translation_table_for_decode
;
5747 if (NILP (translation_table
))
5748 translation_table
= standard
;
5751 if (SYMBOLP (translation_table
))
5752 translation_table
= Fget (translation_table
, Qtranslation_table
);
5753 else if (CONSP (translation_table
))
5755 translation_table
= Fcopy_sequence (translation_table
);
5756 for (val
= translation_table
; CONSP (val
); val
= XCDR (val
))
5757 if (SYMBOLP (XCAR (val
)))
5758 XSETCAR (val
, Fget (XCAR (val
), Qtranslation_table
));
5760 if (CHAR_TABLE_P (standard
))
5762 if (CONSP (translation_table
))
5763 translation_table
= nconc2 (translation_table
,
5764 Fcons (standard
, Qnil
));
5766 translation_table
= Fcons (translation_table
,
5767 Fcons (standard
, Qnil
));
5774 if (CHAR_TABLE_P (translation_table
)
5775 && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (translation_table
)) > 1)
5777 val
= XCHAR_TABLE (translation_table
)->extras
[1];
5778 if (NATNUMP (val
) && *max_lookup
< XFASTINT (val
))
5779 *max_lookup
= XFASTINT (val
);
5781 else if (CONSP (translation_table
))
5783 Lisp_Object tail
, val
;
5785 for (tail
= translation_table
; CONSP (tail
); tail
= XCDR (tail
))
5786 if (CHAR_TABLE_P (XCAR (tail
))
5787 && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (XCAR (tail
))) > 1)
5789 val
= XCHAR_TABLE (XCAR (tail
))->extras
[1];
5790 if (NATNUMP (val
) && *max_lookup
< XFASTINT (val
))
5791 *max_lookup
= XFASTINT (val
);
5795 return translation_table
;
5798 #define LOOKUP_TRANSLATION_TABLE(table, c, trans) \
5801 if (CHAR_TABLE_P (table)) \
5803 trans = CHAR_TABLE_REF (table, c); \
5804 if (CHARACTERP (trans)) \
5805 c = XFASTINT (trans), trans = Qnil; \
5807 else if (CONSP (table)) \
5811 for (tail = table; CONSP (tail); tail = XCDR (tail)) \
5812 if (CHAR_TABLE_P (XCAR (tail))) \
5814 trans = CHAR_TABLE_REF (XCAR (tail), c); \
5815 if (CHARACTERP (trans)) \
5816 c = XFASTINT (trans), trans = Qnil; \
5817 else if (! NILP (trans)) \
5825 get_translation (val
, buf
, buf_end
, last_block
, from_nchars
, to_nchars
)
5829 int *from_nchars
, *to_nchars
;
5831 /* VAL is TO or (([FROM-CHAR ...] . TO) ...) where TO is TO-CHAR or
5835 Lisp_Object from
, tail
;
5838 for (tail
= val
; CONSP (tail
); tail
= XCDR (tail
))
5843 for (i
= 0; i
< len
; i
++)
5845 if (buf
+ i
== buf_end
)
5851 if (XINT (AREF (from
, i
)) != buf
[i
])
5865 *buf
= XINT (AREF (val
, 0)), *to_nchars
= ASIZE (val
);
5873 produce_chars (coding
, translation_table
, last_block
)
5874 struct coding_system
*coding
;
5875 Lisp_Object translation_table
;
5878 unsigned char *dst
= coding
->destination
+ coding
->produced
;
5879 unsigned char *dst_end
= coding
->destination
+ coding
->dst_bytes
;
5881 int produced_chars
= 0;
5884 if (! coding
->chars_at_source
)
5886 /* Characters are in coding->charbuf. */
5887 int *buf
= coding
->charbuf
;
5888 int *buf_end
= buf
+ coding
->charbuf_used
;
5890 if (BUFFERP (coding
->src_object
)
5891 && EQ (coding
->src_object
, coding
->dst_object
))
5892 dst_end
= ((unsigned char *) coding
->source
) + coding
->consumed
;
5894 while (buf
< buf_end
)
5900 int from_nchars
= 1, to_nchars
= 1;
5901 Lisp_Object trans
= Qnil
;
5903 LOOKUP_TRANSLATION_TABLE (translation_table
, c
, trans
);
5906 trans
= get_translation (trans
, buf
, buf_end
, last_block
,
5907 &from_nchars
, &to_nchars
);
5913 if (dst
+ MAX_MULTIBYTE_LENGTH
* to_nchars
> dst_end
)
5915 dst
= alloc_destination (coding
,
5917 + MAX_MULTIBYTE_LENGTH
* to_nchars
,
5919 dst_end
= coding
->destination
+ coding
->dst_bytes
;
5922 for (i
= 0; i
< to_nchars
; i
++)
5925 c
= XINT (AREF (trans
, i
));
5926 if (coding
->dst_multibyte
5927 || ! CHAR_BYTE8_P (c
))
5928 CHAR_STRING_ADVANCE (c
, dst
);
5930 *dst
++ = CHAR_TO_BYTE8 (c
);
5932 produced_chars
+= to_nchars
;
5934 while (--from_nchars
> 0)
5938 /* This is an annotation datum. (-C) is the length. */
5941 carryover
= buf_end
- buf
;
5945 const unsigned char *src
= coding
->source
;
5946 const unsigned char *src_end
= src
+ coding
->src_bytes
;
5947 Lisp_Object eol_type
;
5949 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
5951 if (coding
->src_multibyte
!= coding
->dst_multibyte
)
5953 if (coding
->src_multibyte
)
5960 const unsigned char *src_base
= src
;
5966 if (EQ (eol_type
, Qdos
))
5970 record_conversion_result
5971 (coding
, CODING_RESULT_INSUFFICIENT_SRC
);
5972 goto no_more_source
;
5977 else if (EQ (eol_type
, Qmac
))
5982 coding
->consumed
= src
- coding
->source
;
5984 if (EQ (coding
->src_object
, coding
->dst_object
))
5985 dst_end
= (unsigned char *) src
;
5988 dst
= alloc_destination (coding
, src_end
- src
+ 1,
5990 dst_end
= coding
->destination
+ coding
->dst_bytes
;
5991 coding_set_source (coding
);
5992 src
= coding
->source
+ coding
->consumed
;
5993 src_end
= coding
->source
+ coding
->src_bytes
;
6003 while (src
< src_end
)
6010 if (EQ (eol_type
, Qdos
))
6016 else if (EQ (eol_type
, Qmac
))
6019 if (dst
>= dst_end
- 1)
6021 coding
->consumed
= src
- coding
->source
;
6023 if (EQ (coding
->src_object
, coding
->dst_object
))
6024 dst_end
= (unsigned char *) src
;
6025 if (dst
>= dst_end
- 1)
6027 dst
= alloc_destination (coding
, src_end
- src
+ 2,
6029 dst_end
= coding
->destination
+ coding
->dst_bytes
;
6030 coding_set_source (coding
);
6031 src
= coding
->source
+ coding
->consumed
;
6032 src_end
= coding
->source
+ coding
->src_bytes
;
6040 if (!EQ (coding
->src_object
, coding
->dst_object
))
6042 int require
= coding
->src_bytes
- coding
->dst_bytes
;
6046 EMACS_INT offset
= src
- coding
->source
;
6048 dst
= alloc_destination (coding
, require
, dst
);
6049 coding_set_source (coding
);
6050 src
= coding
->source
+ offset
;
6051 src_end
= coding
->source
+ coding
->src_bytes
;
6054 produced_chars
= coding
->src_chars
;
6055 while (src
< src_end
)
6061 if (EQ (eol_type
, Qdos
))
6068 else if (EQ (eol_type
, Qmac
))
6074 coding
->consumed
= coding
->src_bytes
;
6075 coding
->consumed_char
= coding
->src_chars
;
6078 produced
= dst
- (coding
->destination
+ coding
->produced
);
6079 if (BUFFERP (coding
->dst_object
) && produced_chars
> 0)
6080 insert_from_gap (produced_chars
, produced
);
6081 coding
->produced
+= produced
;
6082 coding
->produced_char
+= produced_chars
;
6086 /* Compose text in CODING->object according to the annotation data at
6087 CHARBUF. CHARBUF is an array:
6088 [ -LENGTH ANNOTATION_MASK FROM TO METHOD COMP_LEN [ COMPONENTS... ] ]
6092 produce_composition (coding
, charbuf
, pos
)
6093 struct coding_system
*coding
;
6099 enum composition_method method
;
6100 Lisp_Object components
;
6103 to
= pos
+ charbuf
[2];
6106 method
= (enum composition_method
) (charbuf
[3]);
6108 if (method
== COMPOSITION_RELATIVE
)
6110 else if (method
>= COMPOSITION_WITH_RULE
6111 && method
<= COMPOSITION_WITH_RULE_ALTCHARS
)
6113 Lisp_Object args
[MAX_COMPOSITION_COMPONENTS
* 2 - 1];
6118 for (i
= 0; i
< len
; i
++)
6120 args
[i
] = make_number (charbuf
[i
]);
6124 components
= (method
== COMPOSITION_WITH_ALTCHARS
6125 ? Fstring (len
, args
) : Fvector (len
, args
));
6129 compose_text (pos
, to
, components
, Qnil
, coding
->dst_object
);
6133 /* Put `charset' property on text in CODING->object according to
6134 the annotation data at CHARBUF. CHARBUF is an array:
6135 [ -LENGTH ANNOTATION_MASK NCHARS CHARSET-ID ]
6139 produce_charset (coding
, charbuf
, pos
)
6140 struct coding_system
*coding
;
6144 EMACS_INT from
= pos
- charbuf
[2];
6145 struct charset
*charset
= CHARSET_FROM_ID (charbuf
[3]);
6147 Fput_text_property (make_number (from
), make_number (pos
),
6148 Qcharset
, CHARSET_NAME (charset
),
6149 coding
->dst_object
);
6153 #define CHARBUF_SIZE 0x4000
6155 #define ALLOC_CONVERSION_WORK_AREA(coding) \
6157 int size = CHARBUF_SIZE;; \
6159 coding->charbuf = NULL; \
6160 while (size > 1024) \
6162 coding->charbuf = (int *) alloca (sizeof (int) * size); \
6163 if (coding->charbuf) \
6167 if (! coding->charbuf) \
6169 record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_MEM); \
6170 return coding->result; \
6172 coding->charbuf_size = size; \
6177 produce_annotation (coding
, pos
)
6178 struct coding_system
*coding
;
6181 int *charbuf
= coding
->charbuf
;
6182 int *charbuf_end
= charbuf
+ coding
->charbuf_used
;
6184 if (NILP (coding
->dst_object
))
6187 while (charbuf
< charbuf_end
)
6193 int len
= -*charbuf
;
6196 case CODING_ANNOTATE_COMPOSITION_MASK
:
6197 produce_composition (coding
, charbuf
, pos
);
6199 case CODING_ANNOTATE_CHARSET_MASK
:
6200 produce_charset (coding
, charbuf
, pos
);
6210 /* Decode the data at CODING->src_object into CODING->dst_object.
6211 CODING->src_object is a buffer, a string, or nil.
6212 CODING->dst_object is a buffer.
6214 If CODING->src_object is a buffer, it must be the current buffer.
6215 In this case, if CODING->src_pos is positive, it is a position of
6216 the source text in the buffer, otherwise, the source text is in the
6217 gap area of the buffer, and CODING->src_pos specifies the offset of
6218 the text from GPT (which must be the same as PT). If this is the
6219 same buffer as CODING->dst_object, CODING->src_pos must be
6222 If CODING->src_object is a string, CODING->src_pos is an index to
6225 If CODING->src_object is nil, CODING->source must already point to
6226 the non-relocatable memory area. In this case, CODING->src_pos is
6227 an offset from CODING->source.
6229 The decoded data is inserted at the current point of the buffer
6234 decode_coding (coding
)
6235 struct coding_system
*coding
;
6238 Lisp_Object undo_list
;
6239 Lisp_Object translation_table
;
6243 if (BUFFERP (coding
->src_object
)
6244 && coding
->src_pos
> 0
6245 && coding
->src_pos
< GPT
6246 && coding
->src_pos
+ coding
->src_chars
> GPT
)
6247 move_gap_both (coding
->src_pos
, coding
->src_pos_byte
);
6250 if (BUFFERP (coding
->dst_object
))
6252 if (current_buffer
!= XBUFFER (coding
->dst_object
))
6253 set_buffer_internal (XBUFFER (coding
->dst_object
));
6255 move_gap_both (PT
, PT_BYTE
);
6256 undo_list
= current_buffer
->undo_list
;
6257 current_buffer
->undo_list
= Qt
;
6260 coding
->consumed
= coding
->consumed_char
= 0;
6261 coding
->produced
= coding
->produced_char
= 0;
6262 coding
->chars_at_source
= 0;
6263 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
6266 ALLOC_CONVERSION_WORK_AREA (coding
);
6268 attrs
= CODING_ID_ATTRS (coding
->id
);
6269 translation_table
= get_translation_table (attrs
, 0, NULL
);
6274 EMACS_INT pos
= coding
->dst_pos
+ coding
->produced_char
;
6276 coding_set_source (coding
);
6277 coding
->annotated
= 0;
6278 coding
->charbuf_used
= carryover
;
6279 (*(coding
->decoder
)) (coding
);
6280 coding_set_destination (coding
);
6281 carryover
= produce_chars (coding
, translation_table
, 0);
6282 if (coding
->annotated
)
6283 produce_annotation (coding
, pos
);
6284 for (i
= 0; i
< carryover
; i
++)
6286 = coding
->charbuf
[coding
->charbuf_used
- carryover
+ i
];
6288 while (coding
->consumed
< coding
->src_bytes
6289 && (coding
->result
== CODING_RESULT_SUCCESS
6290 || coding
->result
== CODING_RESULT_INVALID_SRC
));
6294 coding_set_destination (coding
);
6295 coding
->charbuf_used
= carryover
;
6296 produce_chars (coding
, translation_table
, 1);
6299 coding
->carryover_bytes
= 0;
6300 if (coding
->consumed
< coding
->src_bytes
)
6302 int nbytes
= coding
->src_bytes
- coding
->consumed
;
6303 const unsigned char *src
;
6305 coding_set_source (coding
);
6306 coding_set_destination (coding
);
6307 src
= coding
->source
+ coding
->consumed
;
6309 if (coding
->mode
& CODING_MODE_LAST_BLOCK
)
6311 /* Flush out unprocessed data as binary chars. We are sure
6312 that the number of data is less than the size of
6314 coding
->charbuf_used
= 0;
6315 while (nbytes
-- > 0)
6320 c
= BYTE8_TO_CHAR (c
);
6321 coding
->charbuf
[coding
->charbuf_used
++] = c
;
6323 produce_chars (coding
, Qnil
, 1);
6327 /* Record unprocessed bytes in coding->carryover. We are
6328 sure that the number of data is less than the size of
6329 coding->carryover. */
6330 unsigned char *p
= coding
->carryover
;
6332 coding
->carryover_bytes
= nbytes
;
6333 while (nbytes
-- > 0)
6336 coding
->consumed
= coding
->src_bytes
;
6339 if (! EQ (CODING_ID_EOL_TYPE (coding
->id
), Qunix
))
6340 decode_eol (coding
);
6341 if (BUFFERP (coding
->dst_object
))
6343 current_buffer
->undo_list
= undo_list
;
6344 record_insert (coding
->dst_pos
, coding
->produced_char
);
6346 return coding
->result
;
6350 /* Extract an annotation datum from a composition starting at POS and
6351 ending before LIMIT of CODING->src_object (buffer or string), store
6352 the data in BUF, set *STOP to a starting position of the next
6353 composition (if any) or to LIMIT, and return the address of the
6354 next element of BUF.
6356 If such an annotation is not found, set *STOP to a starting
6357 position of a composition after POS (if any) or to LIMIT, and
6361 handle_composition_annotation (pos
, limit
, coding
, buf
, stop
)
6362 EMACS_INT pos
, limit
;
6363 struct coding_system
*coding
;
6367 EMACS_INT start
, end
;
6370 if (! find_composition (pos
, limit
, &start
, &end
, &prop
, coding
->src_object
)
6373 else if (start
> pos
)
6379 /* We found a composition. Store the corresponding
6380 annotation data in BUF. */
6382 enum composition_method method
= COMPOSITION_METHOD (prop
);
6383 int nchars
= COMPOSITION_LENGTH (prop
);
6385 ADD_COMPOSITION_DATA (buf
, nchars
, method
);
6386 if (method
!= COMPOSITION_RELATIVE
)
6388 Lisp_Object components
;
6391 components
= COMPOSITION_COMPONENTS (prop
);
6392 if (VECTORP (components
))
6394 len
= XVECTOR (components
)->size
;
6395 for (i
= 0; i
< len
; i
++)
6396 *buf
++ = XINT (AREF (components
, i
));
6398 else if (STRINGP (components
))
6400 len
= SCHARS (components
);
6404 FETCH_STRING_CHAR_ADVANCE (*buf
, components
, i
, i_byte
);
6408 else if (INTEGERP (components
))
6411 *buf
++ = XINT (components
);
6413 else if (CONSP (components
))
6415 for (len
= 0; CONSP (components
);
6416 len
++, components
= XCDR (components
))
6417 *buf
++ = XINT (XCAR (components
));
6425 if (find_composition (end
, limit
, &start
, &end
, &prop
,
6436 /* Extract an annotation datum from a text property `charset' at POS of
6437 CODING->src_object (buffer of string), store the data in BUF, set
6438 *STOP to the position where the value of `charset' property changes
6439 (limiting by LIMIT), and return the address of the next element of
6442 If the property value is nil, set *STOP to the position where the
6443 property value is non-nil (limiting by LIMIT), and return BUF. */
6446 handle_charset_annotation (pos
, limit
, coding
, buf
, stop
)
6447 EMACS_INT pos
, limit
;
6448 struct coding_system
*coding
;
6452 Lisp_Object val
, next
;
6455 val
= Fget_text_property (make_number (pos
), Qcharset
, coding
->src_object
);
6456 if (! NILP (val
) && CHARSETP (val
))
6457 id
= XINT (CHARSET_SYMBOL_ID (val
));
6460 ADD_CHARSET_DATA (buf
, 0, id
);
6461 next
= Fnext_single_property_change (make_number (pos
), Qcharset
,
6463 make_number (limit
));
6464 *stop
= XINT (next
);
6470 consume_chars (coding
, translation_table
, max_lookup
)
6471 struct coding_system
*coding
;
6472 Lisp_Object translation_table
;
6475 int *buf
= coding
->charbuf
;
6476 int *buf_end
= coding
->charbuf
+ coding
->charbuf_size
;
6477 const unsigned char *src
= coding
->source
+ coding
->consumed
;
6478 const unsigned char *src_end
= coding
->source
+ coding
->src_bytes
;
6479 EMACS_INT pos
= coding
->src_pos
+ coding
->consumed_char
;
6480 EMACS_INT end_pos
= coding
->src_pos
+ coding
->src_chars
;
6481 int multibytep
= coding
->src_multibyte
;
6482 Lisp_Object eol_type
;
6484 EMACS_INT stop
, stop_composition
, stop_charset
;
6485 int *lookup_buf
= NULL
;
6487 if (! NILP (translation_table
))
6488 lookup_buf
= alloca (sizeof (int) * max_lookup
);
6490 eol_type
= CODING_ID_EOL_TYPE (coding
->id
);
6491 if (VECTORP (eol_type
))
6494 /* Note: composition handling is not yet implemented. */
6495 coding
->common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
6497 if (NILP (coding
->src_object
))
6498 stop
= stop_composition
= stop_charset
= end_pos
;
6501 if (coding
->common_flags
& CODING_ANNOTATE_COMPOSITION_MASK
)
6502 stop
= stop_composition
= pos
;
6504 stop
= stop_composition
= end_pos
;
6505 if (coding
->common_flags
& CODING_ANNOTATE_CHARSET_MASK
)
6506 stop
= stop_charset
= pos
;
6508 stop_charset
= end_pos
;
6511 /* Compensate for CRLF and conversion. */
6512 buf_end
-= 1 + MAX_ANNOTATION_LENGTH
;
6513 while (buf
< buf_end
)
6521 if (pos
== stop_composition
)
6522 buf
= handle_composition_annotation (pos
, end_pos
, coding
,
6523 buf
, &stop_composition
);
6524 if (pos
== stop_charset
)
6525 buf
= handle_charset_annotation (pos
, end_pos
, coding
,
6526 buf
, &stop_charset
);
6527 stop
= (stop_composition
< stop_charset
6528 ? stop_composition
: stop_charset
);
6535 if (coding
->encoder
== encode_coding_raw_text
)
6537 else if ((bytes
= MULTIBYTE_LENGTH (src
, src_end
)) > 0)
6538 c
= STRING_CHAR_ADVANCE (src
), pos
+= bytes
;
6540 c
= BYTE8_TO_CHAR (*src
), src
++, pos
++;
6543 c
= STRING_CHAR_ADVANCE (src
), pos
++;
6544 if ((c
== '\r') && (coding
->mode
& CODING_MODE_SELECTIVE_DISPLAY
))
6546 if (! EQ (eol_type
, Qunix
))
6550 if (EQ (eol_type
, Qdos
))
6558 LOOKUP_TRANSLATION_TABLE (translation_table
, c
, trans
);
6563 int from_nchars
= 1, to_nchars
= 1;
6564 int *lookup_buf_end
;
6565 const unsigned char *p
= src
;
6569 for (i
= 1; i
< max_lookup
&& p
< src_end
; i
++)
6570 lookup_buf
[i
] = STRING_CHAR_ADVANCE (p
);
6571 lookup_buf_end
= lookup_buf
+ i
;
6572 trans
= get_translation (trans
, lookup_buf
, lookup_buf_end
, 1,
6573 &from_nchars
, &to_nchars
);
6575 || buf
+ to_nchars
> buf_end
)
6577 *buf
++ = *lookup_buf
;
6578 for (i
= 1; i
< to_nchars
; i
++)
6579 *buf
++ = XINT (AREF (trans
, i
));
6580 for (i
= 1; i
< from_nchars
; i
++, pos
++)
6581 src
+= MULTIBYTE_LENGTH_NO_CHECK (src
);
6585 coding
->consumed
= src
- coding
->source
;
6586 coding
->consumed_char
= pos
- coding
->src_pos
;
6587 coding
->charbuf_used
= buf
- coding
->charbuf
;
6588 coding
->chars_at_source
= 0;
6592 /* Encode the text at CODING->src_object into CODING->dst_object.
6593 CODING->src_object is a buffer or a string.
6594 CODING->dst_object is a buffer or nil.
6596 If CODING->src_object is a buffer, it must be the current buffer.
6597 In this case, if CODING->src_pos is positive, it is a position of
6598 the source text in the buffer, otherwise. the source text is in the
6599 gap area of the buffer, and coding->src_pos specifies the offset of
6600 the text from GPT (which must be the same as PT). If this is the
6601 same buffer as CODING->dst_object, CODING->src_pos must be
6602 negative and CODING should not have `pre-write-conversion'.
6604 If CODING->src_object is a string, CODING should not have
6605 `pre-write-conversion'.
6607 If CODING->dst_object is a buffer, the encoded data is inserted at
6608 the current point of that buffer.
6610 If CODING->dst_object is nil, the encoded data is placed at the
6611 memory area specified by CODING->destination. */
6614 encode_coding (coding
)
6615 struct coding_system
*coding
;
6618 Lisp_Object translation_table
;
6621 attrs
= CODING_ID_ATTRS (coding
->id
);
6622 if (coding
->encoder
== encode_coding_raw_text
)
6623 translation_table
= Qnil
, max_lookup
= 0;
6625 translation_table
= get_translation_table (attrs
, 1, &max_lookup
);
6627 if (BUFFERP (coding
->dst_object
))
6629 set_buffer_internal (XBUFFER (coding
->dst_object
));
6630 coding
->dst_multibyte
6631 = ! NILP (current_buffer
->enable_multibyte_characters
);
6634 coding
->consumed
= coding
->consumed_char
= 0;
6635 coding
->produced
= coding
->produced_char
= 0;
6636 record_conversion_result (coding
, CODING_RESULT_SUCCESS
);
6639 ALLOC_CONVERSION_WORK_AREA (coding
);
6642 coding_set_source (coding
);
6643 consume_chars (coding
, translation_table
, max_lookup
);
6644 coding_set_destination (coding
);
6645 (*(coding
->encoder
)) (coding
);
6646 } while (coding
->consumed_char
< coding
->src_chars
);
6648 if (BUFFERP (coding
->dst_object
) && coding
->produced_char
> 0)
6649 insert_from_gap (coding
->produced_char
, coding
->produced
);
6651 return (coding
->result
);
6655 /* Name (or base name) of work buffer for code conversion. */
6656 static Lisp_Object Vcode_conversion_workbuf_name
;
6658 /* A working buffer used by the top level conversion. Once it is
6659 created, it is never destroyed. It has the name
6660 Vcode_conversion_workbuf_name. The other working buffers are
6661 destroyed after the use is finished, and their names are modified
6662 versions of Vcode_conversion_workbuf_name. */
6663 static Lisp_Object Vcode_conversion_reused_workbuf
;
6665 /* 1 iff Vcode_conversion_reused_workbuf is already in use. */
6666 static int reused_workbuf_in_use
;
6669 /* Return a working buffer of code convesion. MULTIBYTE specifies the
6670 multibyteness of returning buffer. */
6673 make_conversion_work_buffer (multibyte
)
6676 Lisp_Object name
, workbuf
;
6677 struct buffer
*current
;
6679 if (reused_workbuf_in_use
++)
6681 name
= Fgenerate_new_buffer_name (Vcode_conversion_workbuf_name
, Qnil
);
6682 workbuf
= Fget_buffer_create (name
);
6686 name
= Vcode_conversion_workbuf_name
;
6687 workbuf
= Fget_buffer_create (name
);
6688 if (NILP (Vcode_conversion_reused_workbuf
))
6689 Vcode_conversion_reused_workbuf
= workbuf
;
6691 current
= current_buffer
;
6692 set_buffer_internal (XBUFFER (workbuf
));
6694 current_buffer
->undo_list
= Qt
;
6695 current_buffer
->enable_multibyte_characters
= multibyte
? Qt
: Qnil
;
6696 set_buffer_internal (current
);
6702 code_conversion_restore (arg
)
6705 Lisp_Object current
, workbuf
;
6706 struct gcpro gcpro1
;
6709 current
= XCAR (arg
);
6710 workbuf
= XCDR (arg
);
6711 if (! NILP (workbuf
))
6713 if (EQ (workbuf
, Vcode_conversion_reused_workbuf
))
6714 reused_workbuf_in_use
= 0;
6715 else if (! NILP (Fbuffer_live_p (workbuf
)))
6716 Fkill_buffer (workbuf
);
6718 set_buffer_internal (XBUFFER (current
));
6724 code_conversion_save (with_work_buf
, multibyte
)
6725 int with_work_buf
, multibyte
;
6727 Lisp_Object workbuf
= Qnil
;
6730 workbuf
= make_conversion_work_buffer (multibyte
);
6731 record_unwind_protect (code_conversion_restore
,
6732 Fcons (Fcurrent_buffer (), workbuf
));
6737 decode_coding_gap (coding
, chars
, bytes
)
6738 struct coding_system
*coding
;
6739 EMACS_INT chars
, bytes
;
6741 int count
= specpdl_ptr
- specpdl
;
6744 code_conversion_save (0, 0);
6746 coding
->src_object
= Fcurrent_buffer ();
6747 coding
->src_chars
= chars
;
6748 coding
->src_bytes
= bytes
;
6749 coding
->src_pos
= -chars
;
6750 coding
->src_pos_byte
= -bytes
;
6751 coding
->src_multibyte
= chars
< bytes
;
6752 coding
->dst_object
= coding
->src_object
;
6753 coding
->dst_pos
= PT
;
6754 coding
->dst_pos_byte
= PT_BYTE
;
6755 coding
->dst_multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
6757 if (CODING_REQUIRE_DETECTION (coding
))
6758 detect_coding (coding
);
6760 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6761 current_buffer
->text
->inhibit_shrinking
= 1;
6762 decode_coding (coding
);
6763 current_buffer
->text
->inhibit_shrinking
= 0;
6765 attrs
= CODING_ID_ATTRS (coding
->id
);
6766 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
6768 EMACS_INT prev_Z
= Z
, prev_Z_BYTE
= Z_BYTE
;
6771 TEMP_SET_PT_BOTH (coding
->dst_pos
, coding
->dst_pos_byte
);
6772 val
= call1 (CODING_ATTR_POST_READ (attrs
),
6773 make_number (coding
->produced_char
));
6775 coding
->produced_char
+= Z
- prev_Z
;
6776 coding
->produced
+= Z_BYTE
- prev_Z_BYTE
;
6779 unbind_to (count
, Qnil
);
6780 return coding
->result
;
6784 encode_coding_gap (coding
, chars
, bytes
)
6785 struct coding_system
*coding
;
6786 EMACS_INT chars
, bytes
;
6788 int count
= specpdl_ptr
- specpdl
;
6790 code_conversion_save (0, 0);
6792 coding
->src_object
= Fcurrent_buffer ();
6793 coding
->src_chars
= chars
;
6794 coding
->src_bytes
= bytes
;
6795 coding
->src_pos
= -chars
;
6796 coding
->src_pos_byte
= -bytes
;
6797 coding
->src_multibyte
= chars
< bytes
;
6798 coding
->dst_object
= coding
->src_object
;
6799 coding
->dst_pos
= PT
;
6800 coding
->dst_pos_byte
= PT_BYTE
;
6802 encode_coding (coding
);
6804 unbind_to (count
, Qnil
);
6805 return coding
->result
;
6809 /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in
6810 SRC_OBJECT into DST_OBJECT by coding context CODING.
6812 SRC_OBJECT is a buffer, a string, or Qnil.
6814 If it is a buffer, the text is at point of the buffer. FROM and TO
6815 are positions in the buffer.
6817 If it is a string, the text is at the beginning of the string.
6818 FROM and TO are indices to the string.
6820 If it is nil, the text is at coding->source. FROM and TO are
6821 indices to coding->source.
6823 DST_OBJECT is a buffer, Qt, or Qnil.
6825 If it is a buffer, the decoded text is inserted at point of the
6826 buffer. If the buffer is the same as SRC_OBJECT, the source text
6829 If it is Qt, a string is made from the decoded text, and
6830 set in CODING->dst_object.
6832 If it is Qnil, the decoded text is stored at CODING->destination.
6833 The caller must allocate CODING->dst_bytes bytes at
6834 CODING->destination by xmalloc. If the decoded text is longer than
6835 CODING->dst_bytes, CODING->destination is relocated by xrealloc.
6839 decode_coding_object (coding
, src_object
, from
, from_byte
, to
, to_byte
,
6841 struct coding_system
*coding
;
6842 Lisp_Object src_object
;
6843 EMACS_INT from
, from_byte
, to
, to_byte
;
6844 Lisp_Object dst_object
;
6846 int count
= specpdl_ptr
- specpdl
;
6847 unsigned char *destination
;
6848 EMACS_INT dst_bytes
;
6849 EMACS_INT chars
= to
- from
;
6850 EMACS_INT bytes
= to_byte
- from_byte
;
6853 int saved_pt
= -1, saved_pt_byte
;
6855 buffer
= Fcurrent_buffer ();
6857 if (NILP (dst_object
))
6859 destination
= coding
->destination
;
6860 dst_bytes
= coding
->dst_bytes
;
6863 coding
->src_object
= src_object
;
6864 coding
->src_chars
= chars
;
6865 coding
->src_bytes
= bytes
;
6866 coding
->src_multibyte
= chars
< bytes
;
6868 if (STRINGP (src_object
))
6870 coding
->src_pos
= from
;
6871 coding
->src_pos_byte
= from_byte
;
6873 else if (BUFFERP (src_object
))
6875 set_buffer_internal (XBUFFER (src_object
));
6877 move_gap_both (from
, from_byte
);
6878 if (EQ (src_object
, dst_object
))
6880 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
6881 TEMP_SET_PT_BOTH (from
, from_byte
);
6882 del_range_both (from
, from_byte
, to
, to_byte
, 1);
6883 coding
->src_pos
= -chars
;
6884 coding
->src_pos_byte
= -bytes
;
6888 coding
->src_pos
= from
;
6889 coding
->src_pos_byte
= from_byte
;
6893 if (CODING_REQUIRE_DETECTION (coding
))
6894 detect_coding (coding
);
6895 attrs
= CODING_ID_ATTRS (coding
->id
);
6897 if (EQ (dst_object
, Qt
)
6898 || (! NILP (CODING_ATTR_POST_READ (attrs
))
6899 && NILP (dst_object
)))
6901 coding
->dst_object
= code_conversion_save (1, 1);
6902 coding
->dst_pos
= BEG
;
6903 coding
->dst_pos_byte
= BEG_BYTE
;
6904 coding
->dst_multibyte
= 1;
6906 else if (BUFFERP (dst_object
))
6908 code_conversion_save (0, 0);
6909 coding
->dst_object
= dst_object
;
6910 coding
->dst_pos
= BUF_PT (XBUFFER (dst_object
));
6911 coding
->dst_pos_byte
= BUF_PT_BYTE (XBUFFER (dst_object
));
6912 coding
->dst_multibyte
6913 = ! NILP (XBUFFER (dst_object
)->enable_multibyte_characters
);
6917 code_conversion_save (0, 0);
6918 coding
->dst_object
= Qnil
;
6919 coding
->dst_multibyte
= 1;
6922 decode_coding (coding
);
6924 if (BUFFERP (coding
->dst_object
))
6925 set_buffer_internal (XBUFFER (coding
->dst_object
));
6927 if (! NILP (CODING_ATTR_POST_READ (attrs
)))
6929 struct gcpro gcpro1
, gcpro2
;
6930 EMACS_INT prev_Z
= Z
, prev_Z_BYTE
= Z_BYTE
;
6933 TEMP_SET_PT_BOTH (coding
->dst_pos
, coding
->dst_pos_byte
);
6934 GCPRO2 (coding
->src_object
, coding
->dst_object
);
6935 val
= safe_call1 (CODING_ATTR_POST_READ (attrs
),
6936 make_number (coding
->produced_char
));
6939 coding
->produced_char
+= Z
- prev_Z
;
6940 coding
->produced
+= Z_BYTE
- prev_Z_BYTE
;
6943 if (EQ (dst_object
, Qt
))
6945 coding
->dst_object
= Fbuffer_string ();
6947 else if (NILP (dst_object
) && BUFFERP (coding
->dst_object
))
6949 set_buffer_internal (XBUFFER (coding
->dst_object
));
6950 if (dst_bytes
< coding
->produced
)
6953 = (unsigned char *) xrealloc (destination
, coding
->produced
);
6956 record_conversion_result (coding
,
6957 CODING_RESULT_INSUFFICIENT_DST
);
6958 unbind_to (count
, Qnil
);
6961 if (BEGV
< GPT
&& GPT
< BEGV
+ coding
->produced_char
)
6962 move_gap_both (BEGV
, BEGV_BYTE
);
6963 bcopy (BEGV_ADDR
, destination
, coding
->produced
);
6964 coding
->destination
= destination
;
6970 /* This is the case of:
6971 (BUFFERP (src_object) && EQ (src_object, dst_object))
6972 As we have moved PT while replacing the original buffer
6973 contents, we must recover it now. */
6974 set_buffer_internal (XBUFFER (src_object
));
6975 if (saved_pt
< from
)
6976 TEMP_SET_PT_BOTH (saved_pt
, saved_pt_byte
);
6977 else if (saved_pt
< from
+ chars
)
6978 TEMP_SET_PT_BOTH (from
, from_byte
);
6979 else if (! NILP (current_buffer
->enable_multibyte_characters
))
6980 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced_char
- chars
),
6981 saved_pt_byte
+ (coding
->produced
- bytes
));
6983 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced
- bytes
),
6984 saved_pt_byte
+ (coding
->produced
- bytes
));
6987 unbind_to (count
, coding
->dst_object
);
6992 encode_coding_object (coding
, src_object
, from
, from_byte
, to
, to_byte
,
6994 struct coding_system
*coding
;
6995 Lisp_Object src_object
;
6996 EMACS_INT from
, from_byte
, to
, to_byte
;
6997 Lisp_Object dst_object
;
6999 int count
= specpdl_ptr
- specpdl
;
7000 EMACS_INT chars
= to
- from
;
7001 EMACS_INT bytes
= to_byte
- from_byte
;
7004 int saved_pt
= -1, saved_pt_byte
;
7005 int kill_src_buffer
= 0;
7007 buffer
= Fcurrent_buffer ();
7009 coding
->src_object
= src_object
;
7010 coding
->src_chars
= chars
;
7011 coding
->src_bytes
= bytes
;
7012 coding
->src_multibyte
= chars
< bytes
;
7014 attrs
= CODING_ID_ATTRS (coding
->id
);
7016 if (! NILP (CODING_ATTR_PRE_WRITE (attrs
)))
7018 coding
->src_object
= code_conversion_save (1, coding
->src_multibyte
);
7019 set_buffer_internal (XBUFFER (coding
->src_object
));
7020 if (STRINGP (src_object
))
7021 insert_from_string (src_object
, from
, from_byte
, chars
, bytes
, 0);
7022 else if (BUFFERP (src_object
))
7023 insert_from_buffer (XBUFFER (src_object
), from
, chars
, 0);
7025 insert_1_both (coding
->source
+ from
, chars
, bytes
, 0, 0, 0);
7027 if (EQ (src_object
, dst_object
))
7029 set_buffer_internal (XBUFFER (src_object
));
7030 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
7031 del_range_both (from
, from_byte
, to
, to_byte
, 1);
7032 set_buffer_internal (XBUFFER (coding
->src_object
));
7036 Lisp_Object args
[3];
7038 args
[0] = CODING_ATTR_PRE_WRITE (attrs
);
7039 args
[1] = make_number (BEG
);
7040 args
[2] = make_number (Z
);
7041 safe_call (3, args
);
7043 if (XBUFFER (coding
->src_object
) != current_buffer
)
7044 kill_src_buffer
= 1;
7045 coding
->src_object
= Fcurrent_buffer ();
7047 move_gap_both (BEG
, BEG_BYTE
);
7048 coding
->src_chars
= Z
- BEG
;
7049 coding
->src_bytes
= Z_BYTE
- BEG_BYTE
;
7050 coding
->src_pos
= BEG
;
7051 coding
->src_pos_byte
= BEG_BYTE
;
7052 coding
->src_multibyte
= Z
< Z_BYTE
;
7054 else if (STRINGP (src_object
))
7056 code_conversion_save (0, 0);
7057 coding
->src_pos
= from
;
7058 coding
->src_pos_byte
= from_byte
;
7060 else if (BUFFERP (src_object
))
7062 code_conversion_save (0, 0);
7063 set_buffer_internal (XBUFFER (src_object
));
7064 if (EQ (src_object
, dst_object
))
7066 saved_pt
= PT
, saved_pt_byte
= PT_BYTE
;
7067 coding
->src_object
= del_range_1 (from
, to
, 1, 1);
7068 coding
->src_pos
= 0;
7069 coding
->src_pos_byte
= 0;
7073 if (from
< GPT
&& to
>= GPT
)
7074 move_gap_both (from
, from_byte
);
7075 coding
->src_pos
= from
;
7076 coding
->src_pos_byte
= from_byte
;
7080 code_conversion_save (0, 0);
7082 if (BUFFERP (dst_object
))
7084 coding
->dst_object
= dst_object
;
7085 if (EQ (src_object
, dst_object
))
7087 coding
->dst_pos
= from
;
7088 coding
->dst_pos_byte
= from_byte
;
7092 coding
->dst_pos
= BUF_PT (XBUFFER (dst_object
));
7093 coding
->dst_pos_byte
= BUF_PT_BYTE (XBUFFER (dst_object
));
7095 coding
->dst_multibyte
7096 = ! NILP (XBUFFER (dst_object
)->enable_multibyte_characters
);
7098 else if (EQ (dst_object
, Qt
))
7100 coding
->dst_object
= Qnil
;
7101 coding
->dst_bytes
= coding
->src_chars
;
7102 if (coding
->dst_bytes
== 0)
7103 coding
->dst_bytes
= 1;
7104 coding
->destination
= (unsigned char *) xmalloc (coding
->dst_bytes
);
7105 coding
->dst_multibyte
= 0;
7109 coding
->dst_object
= Qnil
;
7110 coding
->dst_multibyte
= 0;
7113 encode_coding (coding
);
7115 if (EQ (dst_object
, Qt
))
7117 if (BUFFERP (coding
->dst_object
))
7118 coding
->dst_object
= Fbuffer_string ();
7122 = make_unibyte_string ((char *) coding
->destination
,
7124 xfree (coding
->destination
);
7130 /* This is the case of:
7131 (BUFFERP (src_object) && EQ (src_object, dst_object))
7132 As we have moved PT while replacing the original buffer
7133 contents, we must recover it now. */
7134 set_buffer_internal (XBUFFER (src_object
));
7135 if (saved_pt
< from
)
7136 TEMP_SET_PT_BOTH (saved_pt
, saved_pt_byte
);
7137 else if (saved_pt
< from
+ chars
)
7138 TEMP_SET_PT_BOTH (from
, from_byte
);
7139 else if (! NILP (current_buffer
->enable_multibyte_characters
))
7140 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced_char
- chars
),
7141 saved_pt_byte
+ (coding
->produced
- bytes
));
7143 TEMP_SET_PT_BOTH (saved_pt
+ (coding
->produced
- bytes
),
7144 saved_pt_byte
+ (coding
->produced
- bytes
));
7147 if (kill_src_buffer
)
7148 Fkill_buffer (coding
->src_object
);
7149 unbind_to (count
, Qnil
);
7154 preferred_coding_system ()
7156 int id
= coding_categories
[coding_priorities
[0]].id
;
7158 return CODING_ID_NAME (id
);
7163 /*** 8. Emacs Lisp library functions ***/
7165 DEFUN ("coding-system-p", Fcoding_system_p
, Scoding_system_p
, 1, 1, 0,
7166 doc
: /* Return t if OBJECT is nil or a coding-system.
7167 See the documentation of `define-coding-system' for information
7168 about coding-system objects. */)
7173 || CODING_SYSTEM_ID (obj
) >= 0)
7176 || NILP (Fget (obj
, Qcoding_system_define_form
)))
7181 DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system
,
7182 Sread_non_nil_coding_system
, 1, 1, 0,
7183 doc
: /* Read a coding system from the minibuffer, prompting with string PROMPT. */)
7190 val
= Fcompleting_read (prompt
, Vcoding_system_alist
, Qnil
,
7191 Qt
, Qnil
, Qcoding_system_history
, Qnil
, Qnil
);
7193 while (SCHARS (val
) == 0);
7194 return (Fintern (val
, Qnil
));
7197 DEFUN ("read-coding-system", Fread_coding_system
, Sread_coding_system
, 1, 2, 0,
7198 doc
: /* Read a coding system from the minibuffer, prompting with string PROMPT.
7199 If the user enters null input, return second argument DEFAULT-CODING-SYSTEM.
7200 Ignores case when completing coding systems (all Emacs coding systems
7201 are lower-case). */)
7202 (prompt
, default_coding_system
)
7203 Lisp_Object prompt
, default_coding_system
;
7206 int count
= SPECPDL_INDEX ();
7208 if (SYMBOLP (default_coding_system
))
7209 default_coding_system
= SYMBOL_NAME (default_coding_system
);
7210 specbind (Qcompletion_ignore_case
, Qt
);
7211 val
= Fcompleting_read (prompt
, Vcoding_system_alist
, Qnil
,
7212 Qt
, Qnil
, Qcoding_system_history
,
7213 default_coding_system
, Qnil
);
7214 unbind_to (count
, Qnil
);
7215 return (SCHARS (val
) == 0 ? Qnil
: Fintern (val
, Qnil
));
7218 DEFUN ("check-coding-system", Fcheck_coding_system
, Scheck_coding_system
,
7220 doc
: /* Check validity of CODING-SYSTEM.
7221 If valid, return CODING-SYSTEM, else signal a `coding-system-error' error.
7222 It is valid if it is nil or a symbol defined as a coding system by the
7223 function `define-coding-system'. */)
7225 Lisp_Object coding_system
;
7227 Lisp_Object define_form
;
7229 define_form
= Fget (coding_system
, Qcoding_system_define_form
);
7230 if (! NILP (define_form
))
7232 Fput (coding_system
, Qcoding_system_define_form
, Qnil
);
7233 safe_eval (define_form
);
7235 if (!NILP (Fcoding_system_p (coding_system
)))
7236 return coding_system
;
7237 xsignal1 (Qcoding_system_error
, coding_system
);
7241 /* Detect how the bytes at SRC of length SRC_BYTES are encoded. If
7242 HIGHEST is nonzero, return the coding system of the highest
7243 priority among the detected coding systems. Otherwize return a
7244 list of detected coding systems sorted by their priorities. If
7245 MULTIBYTEP is nonzero, it is assumed that the bytes are in correct
7246 multibyte form but contains only ASCII and eight-bit chars.
7247 Otherwise, the bytes are raw bytes.
7249 CODING-SYSTEM controls the detection as below:
7251 If it is nil, detect both text-format and eol-format. If the
7252 text-format part of CODING-SYSTEM is already specified
7253 (e.g. `iso-latin-1'), detect only eol-format. If the eol-format
7254 part of CODING-SYSTEM is already specified (e.g. `undecided-unix'),
7255 detect only text-format. */
7258 detect_coding_system (src
, src_chars
, src_bytes
, highest
, multibytep
,
7260 const unsigned char *src
;
7261 int src_chars
, src_bytes
, highest
;
7263 Lisp_Object coding_system
;
7265 const unsigned char *src_end
= src
+ src_bytes
;
7266 Lisp_Object attrs
, eol_type
;
7268 struct coding_system coding
;
7270 struct coding_detection_info detect_info
;
7271 enum coding_category base_category
;
7273 if (NILP (coding_system
))
7274 coding_system
= Qundecided
;
7275 setup_coding_system (coding_system
, &coding
);
7276 attrs
= CODING_ID_ATTRS (coding
.id
);
7277 eol_type
= CODING_ID_EOL_TYPE (coding
.id
);
7278 coding_system
= CODING_ATTR_BASE_NAME (attrs
);
7280 coding
.source
= src
;
7281 coding
.src_chars
= src_chars
;
7282 coding
.src_bytes
= src_bytes
;
7283 coding
.src_multibyte
= multibytep
;
7284 coding
.consumed
= 0;
7285 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
7287 detect_info
.checked
= detect_info
.found
= detect_info
.rejected
= 0;
7289 /* At first, detect text-format if necessary. */
7290 base_category
= XINT (CODING_ATTR_CATEGORY (attrs
));
7291 if (base_category
== coding_category_undecided
)
7293 enum coding_category category
;
7294 struct coding_system
*this;
7297 /* Skip all ASCII bytes except for a few ISO2022 controls. */
7298 for (i
= 0; src
< src_end
; i
++, src
++)
7304 && (c
== ISO_CODE_ESC
|| c
== ISO_CODE_SI
|| c
== ISO_CODE_SO
)
7305 && ! inhibit_iso_escape_detection
)
7307 coding
.head_ascii
= src
- coding
.source
;
7308 if (detect_coding_iso_2022 (&coding
, &detect_info
))
7310 /* We have scanned the whole data. */
7311 if (! (detect_info
.rejected
& CATEGORY_MASK_ISO_7_ELSE
))
7312 /* We didn't find an 8-bit code. */
7318 coding
.head_ascii
= src
- coding
.source
;
7321 || detect_info
.found
)
7324 /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */
7325 for (i
= 0; i
< coding_category_raw_text
; i
++)
7327 category
= coding_priorities
[i
];
7328 this = coding_categories
+ category
;
7329 if (detect_info
.found
& (1 << category
))
7333 for (i
= 0; i
< coding_category_raw_text
; i
++)
7335 category
= coding_priorities
[i
];
7336 this = coding_categories
+ category
;
7340 /* No coding system of this category is defined. */
7341 detect_info
.rejected
|= (1 << category
);
7343 else if (category
>= coding_category_raw_text
)
7345 else if (detect_info
.checked
& (1 << category
))
7348 && (detect_info
.found
& (1 << category
)))
7353 if ((*(this->detector
)) (&coding
, &detect_info
)
7355 && (detect_info
.found
& (1 << category
)))
7357 if (category
== coding_category_utf_16_auto
)
7359 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
7360 category
= coding_category_utf_16_le
;
7362 category
= coding_category_utf_16_be
;
7370 if (detect_info
.rejected
== CATEGORY_MASK_ANY
)
7372 detect_info
.found
= CATEGORY_MASK_RAW_TEXT
;
7373 id
= coding_categories
[coding_category_raw_text
].id
;
7374 val
= Fcons (make_number (id
), Qnil
);
7376 else if (! detect_info
.rejected
&& ! detect_info
.found
)
7378 detect_info
.found
= CATEGORY_MASK_ANY
;
7379 id
= coding_categories
[coding_category_undecided
].id
;
7380 val
= Fcons (make_number (id
), Qnil
);
7384 if (detect_info
.found
)
7386 detect_info
.found
= 1 << category
;
7387 val
= Fcons (make_number (this->id
), Qnil
);
7390 for (i
= 0; i
< coding_category_raw_text
; i
++)
7391 if (! (detect_info
.rejected
& (1 << coding_priorities
[i
])))
7393 detect_info
.found
= 1 << coding_priorities
[i
];
7394 id
= coding_categories
[coding_priorities
[i
]].id
;
7395 val
= Fcons (make_number (id
), Qnil
);
7401 int mask
= detect_info
.rejected
| detect_info
.found
;
7405 for (i
= coding_category_raw_text
- 1; i
>= 0; i
--)
7407 category
= coding_priorities
[i
];
7408 if (! (mask
& (1 << category
)))
7410 found
|= 1 << category
;
7411 id
= coding_categories
[category
].id
;
7413 val
= Fcons (make_number (id
), val
);
7416 for (i
= coding_category_raw_text
- 1; i
>= 0; i
--)
7418 category
= coding_priorities
[i
];
7419 if (detect_info
.found
& (1 << category
))
7421 id
= coding_categories
[category
].id
;
7422 val
= Fcons (make_number (id
), val
);
7425 detect_info
.found
|= found
;
7428 else if (base_category
== coding_category_utf_16_auto
)
7430 if (detect_coding_utf_16 (&coding
, &detect_info
))
7432 struct coding_system
*this;
7434 if (detect_info
.found
& CATEGORY_MASK_UTF_16_LE
)
7435 this = coding_categories
+ coding_category_utf_16_le
;
7436 else if (detect_info
.found
& CATEGORY_MASK_UTF_16_BE
)
7437 this = coding_categories
+ coding_category_utf_16_be
;
7438 else if (detect_info
.rejected
& CATEGORY_MASK_UTF_16_LE_NOSIG
)
7439 this = coding_categories
+ coding_category_utf_16_be_nosig
;
7441 this = coding_categories
+ coding_category_utf_16_le_nosig
;
7442 val
= Fcons (make_number (this->id
), Qnil
);
7447 detect_info
.found
= 1 << XINT (CODING_ATTR_CATEGORY (attrs
));
7448 val
= Fcons (make_number (coding
.id
), Qnil
);
7451 /* Then, detect eol-format if necessary. */
7453 int normal_eol
= -1, utf_16_be_eol
= -1, utf_16_le_eol
;
7456 if (VECTORP (eol_type
))
7458 if (detect_info
.found
& ~CATEGORY_MASK_UTF_16
)
7459 normal_eol
= detect_eol (coding
.source
, src_bytes
,
7460 coding_category_raw_text
);
7461 if (detect_info
.found
& (CATEGORY_MASK_UTF_16_BE
7462 | CATEGORY_MASK_UTF_16_BE_NOSIG
))
7463 utf_16_be_eol
= detect_eol (coding
.source
, src_bytes
,
7464 coding_category_utf_16_be
);
7465 if (detect_info
.found
& (CATEGORY_MASK_UTF_16_LE
7466 | CATEGORY_MASK_UTF_16_LE_NOSIG
))
7467 utf_16_le_eol
= detect_eol (coding
.source
, src_bytes
,
7468 coding_category_utf_16_le
);
7472 if (EQ (eol_type
, Qunix
))
7473 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_LF
;
7474 else if (EQ (eol_type
, Qdos
))
7475 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_CRLF
;
7477 normal_eol
= utf_16_be_eol
= utf_16_le_eol
= EOL_SEEN_CR
;
7480 for (tail
= val
; CONSP (tail
); tail
= XCDR (tail
))
7482 enum coding_category category
;
7485 id
= XINT (XCAR (tail
));
7486 attrs
= CODING_ID_ATTRS (id
);
7487 category
= XINT (CODING_ATTR_CATEGORY (attrs
));
7488 eol_type
= CODING_ID_EOL_TYPE (id
);
7489 if (VECTORP (eol_type
))
7491 if (category
== coding_category_utf_16_be
7492 || category
== coding_category_utf_16_be_nosig
)
7493 this_eol
= utf_16_be_eol
;
7494 else if (category
== coding_category_utf_16_le
7495 || category
== coding_category_utf_16_le_nosig
)
7496 this_eol
= utf_16_le_eol
;
7498 this_eol
= normal_eol
;
7500 if (this_eol
== EOL_SEEN_LF
)
7501 XSETCAR (tail
, AREF (eol_type
, 0));
7502 else if (this_eol
== EOL_SEEN_CRLF
)
7503 XSETCAR (tail
, AREF (eol_type
, 1));
7504 else if (this_eol
== EOL_SEEN_CR
)
7505 XSETCAR (tail
, AREF (eol_type
, 2));
7507 XSETCAR (tail
, CODING_ID_NAME (id
));
7510 XSETCAR (tail
, CODING_ID_NAME (id
));
7514 return (highest
? XCAR (val
) : val
);
7518 DEFUN ("detect-coding-region", Fdetect_coding_region
, Sdetect_coding_region
,
7520 doc
: /* Detect coding system of the text in the region between START and END.
7521 Return a list of possible coding systems ordered by priority.
7523 If only ASCII characters are found (except for such ISO-2022 control
7524 characters ISO-2022 as ESC), it returns a list of single element
7525 `undecided' or its subsidiary coding system according to a detected
7528 If optional argument HIGHEST is non-nil, return the coding system of
7529 highest priority. */)
7530 (start
, end
, highest
)
7531 Lisp_Object start
, end
, highest
;
7534 int from_byte
, to_byte
;
7536 CHECK_NUMBER_COERCE_MARKER (start
);
7537 CHECK_NUMBER_COERCE_MARKER (end
);
7539 validate_region (&start
, &end
);
7540 from
= XINT (start
), to
= XINT (end
);
7541 from_byte
= CHAR_TO_BYTE (from
);
7542 to_byte
= CHAR_TO_BYTE (to
);
7544 if (from
< GPT
&& to
>= GPT
)
7545 move_gap_both (to
, to_byte
);
7547 return detect_coding_system (BYTE_POS_ADDR (from_byte
),
7548 to
- from
, to_byte
- from_byte
,
7550 !NILP (current_buffer
7551 ->enable_multibyte_characters
),
7555 DEFUN ("detect-coding-string", Fdetect_coding_string
, Sdetect_coding_string
,
7557 doc
: /* Detect coding system of the text in STRING.
7558 Return a list of possible coding systems ordered by priority.
7560 If only ASCII characters are found (except for such ISO-2022 control
7561 characters ISO-2022 as ESC), it returns a list of single element
7562 `undecided' or its subsidiary coding system according to a detected
7565 If optional argument HIGHEST is non-nil, return the coding system of
7566 highest priority. */)
7568 Lisp_Object string
, highest
;
7570 CHECK_STRING (string
);
7572 return detect_coding_system (SDATA (string
),
7573 SCHARS (string
), SBYTES (string
),
7574 !NILP (highest
), STRING_MULTIBYTE (string
),
7580 char_encodable_p (c
, attrs
)
7585 struct charset
*charset
;
7586 Lisp_Object translation_table
;
7588 translation_table
= CODING_ATTR_TRANS_TBL (attrs
);
7589 if (! NILP (translation_table
))
7590 c
= translate_char (translation_table
, c
);
7591 for (tail
= CODING_ATTR_CHARSET_LIST (attrs
);
7592 CONSP (tail
); tail
= XCDR (tail
))
7594 charset
= CHARSET_FROM_ID (XINT (XCAR (tail
)));
7595 if (CHAR_CHARSET_P (c
, charset
))
7598 return (! NILP (tail
));
7602 /* Return a list of coding systems that safely encode the text between
7603 START and END. If EXCLUDE is non-nil, it is a list of coding
7604 systems not to check. The returned list doesn't contain any such
7605 coding systems. In any case, if the text contains only ASCII or is
7606 unibyte, return t. */
7608 DEFUN ("find-coding-systems-region-internal",
7609 Ffind_coding_systems_region_internal
,
7610 Sfind_coding_systems_region_internal
, 2, 3, 0,
7611 doc
: /* Internal use only. */)
7612 (start
, end
, exclude
)
7613 Lisp_Object start
, end
, exclude
;
7615 Lisp_Object coding_attrs_list
, safe_codings
;
7616 EMACS_INT start_byte
, end_byte
;
7617 const unsigned char *p
, *pbeg
, *pend
;
7619 Lisp_Object tail
, elt
;
7621 if (STRINGP (start
))
7623 if (!STRING_MULTIBYTE (start
)
7624 || SCHARS (start
) == SBYTES (start
))
7627 end_byte
= SBYTES (start
);
7631 CHECK_NUMBER_COERCE_MARKER (start
);
7632 CHECK_NUMBER_COERCE_MARKER (end
);
7633 if (XINT (start
) < BEG
|| XINT (end
) > Z
|| XINT (start
) > XINT (end
))
7634 args_out_of_range (start
, end
);
7635 if (NILP (current_buffer
->enable_multibyte_characters
))
7637 start_byte
= CHAR_TO_BYTE (XINT (start
));
7638 end_byte
= CHAR_TO_BYTE (XINT (end
));
7639 if (XINT (end
) - XINT (start
) == end_byte
- start_byte
)
7642 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
7644 if ((GPT
- XINT (start
)) < (XINT (end
) - GPT
))
7645 move_gap_both (XINT (start
), start_byte
);
7647 move_gap_both (XINT (end
), end_byte
);
7651 coding_attrs_list
= Qnil
;
7652 for (tail
= Vcoding_system_list
; CONSP (tail
); tail
= XCDR (tail
))
7654 || NILP (Fmemq (XCAR (tail
), exclude
)))
7658 attrs
= AREF (CODING_SYSTEM_SPEC (XCAR (tail
)), 0);
7659 if (EQ (XCAR (tail
), CODING_ATTR_BASE_NAME (attrs
))
7660 && ! EQ (CODING_ATTR_TYPE (attrs
), Qundecided
))
7662 ASET (attrs
, coding_attr_trans_tbl
,
7663 get_translation_table (attrs
, 1, NULL
));
7664 coding_attrs_list
= Fcons (attrs
, coding_attrs_list
);
7668 if (STRINGP (start
))
7669 p
= pbeg
= SDATA (start
);
7671 p
= pbeg
= BYTE_POS_ADDR (start_byte
);
7672 pend
= p
+ (end_byte
- start_byte
);
7674 while (p
< pend
&& ASCII_BYTE_P (*p
)) p
++;
7675 while (p
< pend
&& ASCII_BYTE_P (*(pend
- 1))) pend
--;
7679 if (ASCII_BYTE_P (*p
))
7683 c
= STRING_CHAR_ADVANCE (p
);
7685 charset_map_loaded
= 0;
7686 for (tail
= coding_attrs_list
; CONSP (tail
);)
7691 else if (char_encodable_p (c
, elt
))
7693 else if (CONSP (XCDR (tail
)))
7695 XSETCAR (tail
, XCAR (XCDR (tail
)));
7696 XSETCDR (tail
, XCDR (XCDR (tail
)));
7700 XSETCAR (tail
, Qnil
);
7704 if (charset_map_loaded
)
7706 EMACS_INT p_offset
= p
- pbeg
, pend_offset
= pend
- pbeg
;
7708 if (STRINGP (start
))
7709 pbeg
= SDATA (start
);
7711 pbeg
= BYTE_POS_ADDR (start_byte
);
7712 p
= pbeg
+ p_offset
;
7713 pend
= pbeg
+ pend_offset
;
7718 safe_codings
= list2 (Qraw_text
, Qno_conversion
);
7719 for (tail
= coding_attrs_list
; CONSP (tail
); tail
= XCDR (tail
))
7720 if (! NILP (XCAR (tail
)))
7721 safe_codings
= Fcons (CODING_ATTR_BASE_NAME (XCAR (tail
)), safe_codings
);
7723 return safe_codings
;
7727 DEFUN ("unencodable-char-position", Funencodable_char_position
,
7728 Sunencodable_char_position
, 3, 5, 0,
7730 Return position of first un-encodable character in a region.
7731 START and END specfiy the region and CODING-SYSTEM specifies the
7732 encoding to check. Return nil if CODING-SYSTEM does encode the region.
7734 If optional 4th argument COUNT is non-nil, it specifies at most how
7735 many un-encodable characters to search. In this case, the value is a
7738 If optional 5th argument STRING is non-nil, it is a string to search
7739 for un-encodable characters. In that case, START and END are indexes
7741 (start
, end
, coding_system
, count
, string
)
7742 Lisp_Object start
, end
, coding_system
, count
, string
;
7745 struct coding_system coding
;
7746 Lisp_Object attrs
, charset_list
, translation_table
;
7747 Lisp_Object positions
;
7749 const unsigned char *p
, *stop
, *pend
;
7750 int ascii_compatible
;
7752 setup_coding_system (Fcheck_coding_system (coding_system
), &coding
);
7753 attrs
= CODING_ID_ATTRS (coding
.id
);
7754 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
7756 ascii_compatible
= ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
));
7757 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
7758 translation_table
= get_translation_table (attrs
, 1, NULL
);
7762 validate_region (&start
, &end
);
7763 from
= XINT (start
);
7765 if (NILP (current_buffer
->enable_multibyte_characters
)
7766 || (ascii_compatible
7767 && (to
- from
) == (CHAR_TO_BYTE (to
) - (CHAR_TO_BYTE (from
)))))
7769 p
= CHAR_POS_ADDR (from
);
7770 pend
= CHAR_POS_ADDR (to
);
7771 if (from
< GPT
&& to
>= GPT
)
7778 CHECK_STRING (string
);
7779 CHECK_NATNUM (start
);
7781 from
= XINT (start
);
7784 || to
> SCHARS (string
))
7785 args_out_of_range_3 (string
, start
, end
);
7786 if (! STRING_MULTIBYTE (string
))
7788 p
= SDATA (string
) + string_char_to_byte (string
, from
);
7789 stop
= pend
= SDATA (string
) + string_char_to_byte (string
, to
);
7790 if (ascii_compatible
&& (to
- from
) == (pend
- p
))
7798 CHECK_NATNUM (count
);
7807 if (ascii_compatible
)
7808 while (p
< stop
&& ASCII_BYTE_P (*p
))
7818 c
= STRING_CHAR_ADVANCE (p
);
7819 if (! (ASCII_CHAR_P (c
) && ascii_compatible
)
7820 && ! char_charset (translate_char (translation_table
, c
),
7821 charset_list
, NULL
))
7823 positions
= Fcons (make_number (from
), positions
);
7832 return (NILP (count
) ? Fcar (positions
) : Fnreverse (positions
));
7836 DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region
,
7837 Scheck_coding_systems_region
, 3, 3, 0,
7838 doc
: /* Check if the region is encodable by coding systems.
7840 START and END are buffer positions specifying the region.
7841 CODING-SYSTEM-LIST is a list of coding systems to check.
7843 The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where
7844 CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the
7845 whole region, POS0, POS1, ... are buffer positions where non-encodable
7846 characters are found.
7848 If all coding systems in CODING-SYSTEM-LIST can encode the region, the
7851 START may be a string. In that case, check if the string is
7852 encodable, and the value contains indices to the string instead of
7853 buffer positions. END is ignored. */)
7854 (start
, end
, coding_system_list
)
7855 Lisp_Object start
, end
, coding_system_list
;
7858 EMACS_INT start_byte
, end_byte
;
7860 const unsigned char *p
, *pbeg
, *pend
;
7862 Lisp_Object tail
, elt
, attrs
;
7864 if (STRINGP (start
))
7866 if (!STRING_MULTIBYTE (start
)
7867 && SCHARS (start
) != SBYTES (start
))
7870 end_byte
= SBYTES (start
);
7875 CHECK_NUMBER_COERCE_MARKER (start
);
7876 CHECK_NUMBER_COERCE_MARKER (end
);
7877 if (XINT (start
) < BEG
|| XINT (end
) > Z
|| XINT (start
) > XINT (end
))
7878 args_out_of_range (start
, end
);
7879 if (NILP (current_buffer
->enable_multibyte_characters
))
7881 start_byte
= CHAR_TO_BYTE (XINT (start
));
7882 end_byte
= CHAR_TO_BYTE (XINT (end
));
7883 if (XINT (end
) - XINT (start
) == end_byte
- start_byte
)
7886 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
7888 if ((GPT
- XINT (start
)) < (XINT (end
) - GPT
))
7889 move_gap_both (XINT (start
), start_byte
);
7891 move_gap_both (XINT (end
), end_byte
);
7897 for (tail
= coding_system_list
; CONSP (tail
); tail
= XCDR (tail
))
7900 attrs
= AREF (CODING_SYSTEM_SPEC (elt
), 0);
7901 ASET (attrs
, coding_attr_trans_tbl
,
7902 get_translation_table (attrs
, 1, NULL
));
7903 list
= Fcons (Fcons (elt
, Fcons (attrs
, Qnil
)), list
);
7906 if (STRINGP (start
))
7907 p
= pbeg
= SDATA (start
);
7909 p
= pbeg
= BYTE_POS_ADDR (start_byte
);
7910 pend
= p
+ (end_byte
- start_byte
);
7912 while (p
< pend
&& ASCII_BYTE_P (*p
)) p
++, pos
++;
7913 while (p
< pend
&& ASCII_BYTE_P (*(pend
- 1))) pend
--;
7917 if (ASCII_BYTE_P (*p
))
7921 c
= STRING_CHAR_ADVANCE (p
);
7923 charset_map_loaded
= 0;
7924 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
7926 elt
= XCDR (XCAR (tail
));
7927 if (! char_encodable_p (c
, XCAR (elt
)))
7928 XSETCDR (elt
, Fcons (make_number (pos
), XCDR (elt
)));
7930 if (charset_map_loaded
)
7932 EMACS_INT p_offset
= p
- pbeg
, pend_offset
= pend
- pbeg
;
7934 if (STRINGP (start
))
7935 pbeg
= SDATA (start
);
7937 pbeg
= BYTE_POS_ADDR (start_byte
);
7938 p
= pbeg
+ p_offset
;
7939 pend
= pbeg
+ pend_offset
;
7947 for (; CONSP (tail
); tail
= XCDR (tail
))
7950 if (CONSP (XCDR (XCDR (elt
))))
7951 list
= Fcons (Fcons (XCAR (elt
), Fnreverse (XCDR (XCDR (elt
)))),
7960 code_convert_region (start
, end
, coding_system
, dst_object
, encodep
, norecord
)
7961 Lisp_Object start
, end
, coding_system
, dst_object
;
7962 int encodep
, norecord
;
7964 struct coding_system coding
;
7965 EMACS_INT from
, from_byte
, to
, to_byte
;
7966 Lisp_Object src_object
;
7968 CHECK_NUMBER_COERCE_MARKER (start
);
7969 CHECK_NUMBER_COERCE_MARKER (end
);
7970 if (NILP (coding_system
))
7971 coding_system
= Qno_conversion
;
7973 CHECK_CODING_SYSTEM (coding_system
);
7974 src_object
= Fcurrent_buffer ();
7975 if (NILP (dst_object
))
7976 dst_object
= src_object
;
7977 else if (! EQ (dst_object
, Qt
))
7978 CHECK_BUFFER (dst_object
);
7980 validate_region (&start
, &end
);
7981 from
= XFASTINT (start
);
7982 from_byte
= CHAR_TO_BYTE (from
);
7983 to
= XFASTINT (end
);
7984 to_byte
= CHAR_TO_BYTE (to
);
7986 setup_coding_system (coding_system
, &coding
);
7987 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
7990 encode_coding_object (&coding
, src_object
, from
, from_byte
, to
, to_byte
,
7993 decode_coding_object (&coding
, src_object
, from
, from_byte
, to
, to_byte
,
7996 Vlast_coding_system_used
= CODING_ID_NAME (coding
.id
);
7998 return (BUFFERP (dst_object
)
7999 ? make_number (coding
.produced_char
)
8000 : coding
.dst_object
);
8004 DEFUN ("decode-coding-region", Fdecode_coding_region
, Sdecode_coding_region
,
8005 3, 4, "r\nzCoding system: ",
8006 doc
: /* Decode the current region from the specified coding system.
8007 When called from a program, takes four arguments:
8008 START, END, CODING-SYSTEM, and DESTINATION.
8009 START and END are buffer positions.
8011 Optional 4th arguments DESTINATION specifies where the decoded text goes.
8012 If nil, the region between START and END is replace by the decoded text.
8013 If buffer, the decoded text is inserted in the buffer.
8014 If t, the decoded text is returned.
8016 This function sets `last-coding-system-used' to the precise coding system
8017 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
8018 not fully specified.)
8019 It returns the length of the decoded text. */)
8020 (start
, end
, coding_system
, destination
)
8021 Lisp_Object start
, end
, coding_system
, destination
;
8023 return code_convert_region (start
, end
, coding_system
, destination
, 0, 0);
8026 DEFUN ("encode-coding-region", Fencode_coding_region
, Sencode_coding_region
,
8027 3, 4, "r\nzCoding system: ",
8028 doc
: /* Encode the current region by specified coding system.
8029 When called from a program, takes three arguments:
8030 START, END, and CODING-SYSTEM. START and END are buffer positions.
8032 Optional 4th arguments DESTINATION specifies where the encoded text goes.
8033 If nil, the region between START and END is replace by the encoded text.
8034 If buffer, the encoded text is inserted in the buffer.
8035 If t, the encoded text is returned.
8037 This function sets `last-coding-system-used' to the precise coding system
8038 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
8039 not fully specified.)
8040 It returns the length of the encoded text. */)
8041 (start
, end
, coding_system
, destination
)
8042 Lisp_Object start
, end
, coding_system
, destination
;
8044 return code_convert_region (start
, end
, coding_system
, destination
, 1, 0);
8048 code_convert_string (string
, coding_system
, dst_object
,
8049 encodep
, nocopy
, norecord
)
8050 Lisp_Object string
, coding_system
, dst_object
;
8051 int encodep
, nocopy
, norecord
;
8053 struct coding_system coding
;
8054 EMACS_INT chars
, bytes
;
8056 CHECK_STRING (string
);
8057 if (NILP (coding_system
))
8060 Vlast_coding_system_used
= Qno_conversion
;
8061 if (NILP (dst_object
))
8062 return (nocopy
? Fcopy_sequence (string
) : string
);
8065 if (NILP (coding_system
))
8066 coding_system
= Qno_conversion
;
8068 CHECK_CODING_SYSTEM (coding_system
);
8069 if (NILP (dst_object
))
8071 else if (! EQ (dst_object
, Qt
))
8072 CHECK_BUFFER (dst_object
);
8074 setup_coding_system (coding_system
, &coding
);
8075 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
8076 chars
= SCHARS (string
);
8077 bytes
= SBYTES (string
);
8079 encode_coding_object (&coding
, string
, 0, 0, chars
, bytes
, dst_object
);
8081 decode_coding_object (&coding
, string
, 0, 0, chars
, bytes
, dst_object
);
8083 Vlast_coding_system_used
= CODING_ID_NAME (coding
.id
);
8085 return (BUFFERP (dst_object
)
8086 ? make_number (coding
.produced_char
)
8087 : coding
.dst_object
);
8091 /* Encode or decode STRING according to CODING_SYSTEM.
8092 Do not set Vlast_coding_system_used.
8094 This function is called only from macros DECODE_FILE and
8095 ENCODE_FILE, thus we ignore character composition. */
8098 code_convert_string_norecord (string
, coding_system
, encodep
)
8099 Lisp_Object string
, coding_system
;
8102 return code_convert_string (string
, coding_system
, Qt
, encodep
, 0, 1);
8106 DEFUN ("decode-coding-string", Fdecode_coding_string
, Sdecode_coding_string
,
8108 doc
: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result.
8110 Optional third arg NOCOPY non-nil means it is OK to return STRING itself
8111 if the decoding operation is trivial.
8113 Optional fourth arg BUFFER non-nil meant that the decoded text is
8114 inserted in BUFFER instead of returned as a string. In this case,
8115 the return value is BUFFER.
8117 This function sets `last-coding-system-used' to the precise coding system
8118 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
8119 not fully specified. */)
8120 (string
, coding_system
, nocopy
, buffer
)
8121 Lisp_Object string
, coding_system
, nocopy
, buffer
;
8123 return code_convert_string (string
, coding_system
, buffer
,
8124 0, ! NILP (nocopy
), 0);
8127 DEFUN ("encode-coding-string", Fencode_coding_string
, Sencode_coding_string
,
8129 doc
: /* Encode STRING to CODING-SYSTEM, and return the result.
8131 Optional third arg NOCOPY non-nil means it is OK to return STRING
8132 itself if the encoding operation is trivial.
8134 Optional fourth arg BUFFER non-nil meant that the encoded text is
8135 inserted in BUFFER instead of returned as a string. In this case,
8136 the return value is BUFFER.
8138 This function sets `last-coding-system-used' to the precise coding system
8139 used (which may be different from CODING-SYSTEM if CODING-SYSTEM is
8140 not fully specified.) */)
8141 (string
, coding_system
, nocopy
, buffer
)
8142 Lisp_Object string
, coding_system
, nocopy
, buffer
;
8144 return code_convert_string (string
, coding_system
, buffer
,
8145 1, ! NILP (nocopy
), 1);
8149 DEFUN ("decode-sjis-char", Fdecode_sjis_char
, Sdecode_sjis_char
, 1, 1, 0,
8150 doc
: /* Decode a Japanese character which has CODE in shift_jis encoding.
8151 Return the corresponding character. */)
8155 Lisp_Object spec
, attrs
, val
;
8156 struct charset
*charset_roman
, *charset_kanji
, *charset_kana
, *charset
;
8159 CHECK_NATNUM (code
);
8160 c
= XFASTINT (code
);
8161 CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system
, spec
);
8162 attrs
= AREF (spec
, 0);
8164 if (ASCII_BYTE_P (c
)
8165 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
8168 val
= CODING_ATTR_CHARSET_LIST (attrs
);
8169 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
8170 charset_kana
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
8171 charset_kanji
= CHARSET_FROM_ID (XINT (XCAR (val
)));
8174 charset
= charset_roman
;
8175 else if (c
>= 0xA0 && c
< 0xDF)
8177 charset
= charset_kana
;
8182 int s1
= c
>> 8, s2
= c
& 0xFF;
8184 if (s1
< 0x81 || (s1
> 0x9F && s1
< 0xE0) || s1
> 0xEF
8185 || s2
< 0x40 || s2
== 0x7F || s2
> 0xFC)
8186 error ("Invalid code: %d", code
);
8188 charset
= charset_kanji
;
8190 c
= DECODE_CHAR (charset
, c
);
8192 error ("Invalid code: %d", code
);
8193 return make_number (c
);
8197 DEFUN ("encode-sjis-char", Fencode_sjis_char
, Sencode_sjis_char
, 1, 1, 0,
8198 doc
: /* Encode a Japanese character CH to shift_jis encoding.
8199 Return the corresponding code in SJIS. */)
8203 Lisp_Object spec
, attrs
, charset_list
;
8205 struct charset
*charset
;
8208 CHECK_CHARACTER (ch
);
8210 CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system
, spec
);
8211 attrs
= AREF (spec
, 0);
8213 if (ASCII_CHAR_P (c
)
8214 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
8217 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
8218 charset
= char_charset (c
, charset_list
, &code
);
8219 if (code
== CHARSET_INVALID_CODE (charset
))
8220 error ("Can't encode by shift_jis encoding: %d", c
);
8223 return make_number (code
);
8226 DEFUN ("decode-big5-char", Fdecode_big5_char
, Sdecode_big5_char
, 1, 1, 0,
8227 doc
: /* Decode a Big5 character which has CODE in BIG5 coding system.
8228 Return the corresponding character. */)
8232 Lisp_Object spec
, attrs
, val
;
8233 struct charset
*charset_roman
, *charset_big5
, *charset
;
8236 CHECK_NATNUM (code
);
8237 c
= XFASTINT (code
);
8238 CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system
, spec
);
8239 attrs
= AREF (spec
, 0);
8241 if (ASCII_BYTE_P (c
)
8242 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
8245 val
= CODING_ATTR_CHARSET_LIST (attrs
);
8246 charset_roman
= CHARSET_FROM_ID (XINT (XCAR (val
))), val
= XCDR (val
);
8247 charset_big5
= CHARSET_FROM_ID (XINT (XCAR (val
)));
8250 charset
= charset_roman
;
8253 int b1
= c
>> 8, b2
= c
& 0x7F;
8254 if (b1
< 0xA1 || b1
> 0xFE
8255 || b2
< 0x40 || (b2
> 0x7E && b2
< 0xA1) || b2
> 0xFE)
8256 error ("Invalid code: %d", code
);
8257 charset
= charset_big5
;
8259 c
= DECODE_CHAR (charset
, (unsigned )c
);
8261 error ("Invalid code: %d", code
);
8262 return make_number (c
);
8265 DEFUN ("encode-big5-char", Fencode_big5_char
, Sencode_big5_char
, 1, 1, 0,
8266 doc
: /* Encode the Big5 character CH to BIG5 coding system.
8267 Return the corresponding character code in Big5. */)
8271 Lisp_Object spec
, attrs
, charset_list
;
8272 struct charset
*charset
;
8276 CHECK_CHARACTER (ch
);
8278 CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system
, spec
);
8279 attrs
= AREF (spec
, 0);
8280 if (ASCII_CHAR_P (c
)
8281 && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs
)))
8284 charset_list
= CODING_ATTR_CHARSET_LIST (attrs
);
8285 charset
= char_charset (c
, charset_list
, &code
);
8286 if (code
== CHARSET_INVALID_CODE (charset
))
8287 error ("Can't encode by Big5 encoding: %d", c
);
8289 return make_number (code
);
8293 DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal
,
8294 Sset_terminal_coding_system_internal
, 1, 2, 0,
8295 doc
: /* Internal use only. */)
8296 (coding_system
, terminal
)
8297 Lisp_Object coding_system
;
8298 Lisp_Object terminal
;
8300 struct coding_system
*terminal_coding
= TERMINAL_TERMINAL_CODING (get_terminal (terminal
, 1));
8301 CHECK_SYMBOL (coding_system
);
8302 setup_coding_system (Fcheck_coding_system (coding_system
), terminal_coding
);
8303 /* We had better not send unsafe characters to terminal. */
8304 terminal_coding
->mode
|= CODING_MODE_SAFE_ENCODING
;
8305 /* Characer composition should be disabled. */
8306 terminal_coding
->common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
8307 terminal_coding
->src_multibyte
= 1;
8308 terminal_coding
->dst_multibyte
= 0;
8312 DEFUN ("set-safe-terminal-coding-system-internal",
8313 Fset_safe_terminal_coding_system_internal
,
8314 Sset_safe_terminal_coding_system_internal
, 1, 1, 0,
8315 doc
: /* Internal use only. */)
8317 Lisp_Object coding_system
;
8319 CHECK_SYMBOL (coding_system
);
8320 setup_coding_system (Fcheck_coding_system (coding_system
),
8321 &safe_terminal_coding
);
8322 /* Characer composition should be disabled. */
8323 safe_terminal_coding
.common_flags
&= ~CODING_ANNOTATE_COMPOSITION_MASK
;
8324 safe_terminal_coding
.src_multibyte
= 1;
8325 safe_terminal_coding
.dst_multibyte
= 0;
8329 DEFUN ("terminal-coding-system", Fterminal_coding_system
,
8330 Sterminal_coding_system
, 0, 1, 0,
8331 doc
: /* Return coding system specified for terminal output on the given terminal.
8332 TERMINAL may be a terminal id, a frame, or nil for the selected
8333 frame's terminal device. */)
8335 Lisp_Object terminal
;
8337 struct coding_system
*terminal_coding
8338 = TERMINAL_TERMINAL_CODING (get_terminal (terminal
, 1));
8339 Lisp_Object coding_system
= CODING_ID_NAME (terminal_coding
->id
);
8341 /* For backward compatibility, return nil if it is `undecided'. */
8342 return (! EQ (coding_system
, Qundecided
) ? coding_system
: Qnil
);
8345 DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal
,
8346 Sset_keyboard_coding_system_internal
, 1, 2, 0,
8347 doc
: /* Internal use only. */)
8348 (coding_system
, terminal
)
8349 Lisp_Object coding_system
;
8350 Lisp_Object terminal
;
8352 struct terminal
*t
= get_terminal (terminal
, 1);
8353 CHECK_SYMBOL (coding_system
);
8354 setup_coding_system (Fcheck_coding_system (coding_system
),
8355 TERMINAL_KEYBOARD_CODING (t
));
8356 /* Characer composition should be disabled. */
8357 TERMINAL_KEYBOARD_CODING (t
)->common_flags
8358 &= ~CODING_ANNOTATE_COMPOSITION_MASK
;
8362 DEFUN ("keyboard-coding-system",
8363 Fkeyboard_coding_system
, Skeyboard_coding_system
, 0, 1, 0,
8364 doc
: /* Return coding system specified for decoding keyboard input. */)
8366 Lisp_Object terminal
;
8368 return CODING_ID_NAME (TERMINAL_KEYBOARD_CODING
8369 (get_terminal (terminal
, 1))->id
);
8373 DEFUN ("find-operation-coding-system", Ffind_operation_coding_system
,
8374 Sfind_operation_coding_system
, 1, MANY
, 0,
8375 doc
: /* Choose a coding system for an operation based on the target name.
8376 The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM).
8377 DECODING-SYSTEM is the coding system to use for decoding
8378 \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system
8379 for encoding (in case OPERATION does encoding).
8381 The first argument OPERATION specifies an I/O primitive:
8382 For file I/O, `insert-file-contents' or `write-region'.
8383 For process I/O, `call-process', `call-process-region', or `start-process'.
8384 For network I/O, `open-network-stream'.
8386 The remaining arguments should be the same arguments that were passed
8387 to the primitive. Depending on which primitive, one of those arguments
8388 is selected as the TARGET. For example, if OPERATION does file I/O,
8389 whichever argument specifies the file name is TARGET.
8391 TARGET has a meaning which depends on OPERATION:
8392 For file I/O, TARGET is a file name (except for the special case below).
8393 For process I/O, TARGET is a process name.
8394 For network I/O, TARGET is a service name or a port number
8396 This function looks up what specified for TARGET in,
8397 `file-coding-system-alist', `process-coding-system-alist',
8398 or `network-coding-system-alist' depending on OPERATION.
8399 They may specify a coding system, a cons of coding systems,
8400 or a function symbol to call.
8401 In the last case, we call the function with one argument,
8402 which is a list of all the arguments given to this function.
8403 If the function can't decide a coding system, it can return
8404 `undecided' so that the normal code-detection is performed.
8406 If OPERATION is `insert-file-contents', the argument corresponding to
8407 TARGET may be a cons (FILENAME . BUFFER). In that case, FILENAME is a
8408 file name to look up, and BUFFER is a buffer that contains the file's
8409 contents (not yet decoded). If `file-coding-system-alist' specifies a
8410 function to call for FILENAME, that function should examine the
8411 contents of BUFFER instead of reading the file.
8413 usage: (find-operation-coding-system OPERATION ARGUMENTS...) */)
8418 Lisp_Object operation
, target_idx
, target
, val
;
8419 register Lisp_Object chain
;
8422 error ("Too few arguments");
8423 operation
= args
[0];
8424 if (!SYMBOLP (operation
)
8425 || !INTEGERP (target_idx
= Fget (operation
, Qtarget_idx
)))
8426 error ("Invalid first arguement");
8427 if (nargs
< 1 + XINT (target_idx
))
8428 error ("Too few arguments for operation: %s",
8429 SDATA (SYMBOL_NAME (operation
)));
8430 target
= args
[XINT (target_idx
) + 1];
8431 if (!(STRINGP (target
)
8432 || (EQ (operation
, Qinsert_file_contents
) && CONSP (target
)
8433 && STRINGP (XCAR (target
)) && BUFFERP (XCDR (target
)))
8434 || (EQ (operation
, Qopen_network_stream
) && INTEGERP (target
))))
8435 error ("Invalid %dth argument", XINT (target_idx
) + 1);
8437 target
= XCAR (target
);
8439 chain
= ((EQ (operation
, Qinsert_file_contents
)
8440 || EQ (operation
, Qwrite_region
))
8441 ? Vfile_coding_system_alist
8442 : (EQ (operation
, Qopen_network_stream
)
8443 ? Vnetwork_coding_system_alist
8444 : Vprocess_coding_system_alist
));
8448 for (; CONSP (chain
); chain
= XCDR (chain
))
8454 && ((STRINGP (target
)
8455 && STRINGP (XCAR (elt
))
8456 && fast_string_match (XCAR (elt
), target
) >= 0)
8457 || (INTEGERP (target
) && EQ (target
, XCAR (elt
)))))
8460 /* Here, if VAL is both a valid coding system and a valid
8461 function symbol, we return VAL as a coding system. */
8464 if (! SYMBOLP (val
))
8466 if (! NILP (Fcoding_system_p (val
)))
8467 return Fcons (val
, val
);
8468 if (! NILP (Ffboundp (val
)))
8470 /* We use call1 rather than safe_call1
8471 so as to get bug reports about functions called here
8472 which don't handle the current interface. */
8473 val
= call1 (val
, Flist (nargs
, args
));
8476 if (SYMBOLP (val
) && ! NILP (Fcoding_system_p (val
)))
8477 return Fcons (val
, val
);
8485 DEFUN ("set-coding-system-priority", Fset_coding_system_priority
,
8486 Sset_coding_system_priority
, 0, MANY
, 0,
8487 doc
: /* Assign higher priority to the coding systems given as arguments.
8488 If multiple coding systems belongs to the same category,
8489 all but the first one are ignored.
8491 usage: (set-coding-system-priority ...) */)
8497 int changed
[coding_category_max
];
8498 enum coding_category priorities
[coding_category_max
];
8500 bzero (changed
, sizeof changed
);
8502 for (i
= j
= 0; i
< nargs
; i
++)
8504 enum coding_category category
;
8505 Lisp_Object spec
, attrs
;
8507 CHECK_CODING_SYSTEM_GET_SPEC (args
[i
], spec
);
8508 attrs
= AREF (spec
, 0);
8509 category
= XINT (CODING_ATTR_CATEGORY (attrs
));
8510 if (changed
[category
])
8511 /* Ignore this coding system because a coding system of the
8512 same category already had a higher priority. */
8514 changed
[category
] = 1;
8515 priorities
[j
++] = category
;
8516 if (coding_categories
[category
].id
>= 0
8517 && ! EQ (args
[i
], CODING_ID_NAME (coding_categories
[category
].id
)))
8518 setup_coding_system (args
[i
], &coding_categories
[category
]);
8519 Fset (AREF (Vcoding_category_table
, category
), args
[i
]);
8522 /* Now we have decided top J priorities. Reflect the order of the
8523 original priorities to the remaining priorities. */
8525 for (i
= j
, j
= 0; i
< coding_category_max
; i
++, j
++)
8527 while (j
< coding_category_max
8528 && changed
[coding_priorities
[j
]])
8530 if (j
== coding_category_max
)
8532 priorities
[i
] = coding_priorities
[j
];
8535 bcopy (priorities
, coding_priorities
, sizeof priorities
);
8537 /* Update `coding-category-list'. */
8538 Vcoding_category_list
= Qnil
;
8539 for (i
= coding_category_max
- 1; i
>= 0; i
--)
8540 Vcoding_category_list
8541 = Fcons (AREF (Vcoding_category_table
, priorities
[i
]),
8542 Vcoding_category_list
);
8547 DEFUN ("coding-system-priority-list", Fcoding_system_priority_list
,
8548 Scoding_system_priority_list
, 0, 1, 0,
8549 doc
: /* Return a list of coding systems ordered by their priorities.
8550 HIGHESTP non-nil means just return the highest priority one. */)
8552 Lisp_Object highestp
;
8557 for (i
= 0, val
= Qnil
; i
< coding_category_max
; i
++)
8559 enum coding_category category
= coding_priorities
[i
];
8560 int id
= coding_categories
[category
].id
;
8565 attrs
= CODING_ID_ATTRS (id
);
8566 if (! NILP (highestp
))
8567 return CODING_ATTR_BASE_NAME (attrs
);
8568 val
= Fcons (CODING_ATTR_BASE_NAME (attrs
), val
);
8570 return Fnreverse (val
);
8573 static char *suffixes
[] = { "-unix", "-dos", "-mac" };
8576 make_subsidiaries (base
)
8579 Lisp_Object subsidiaries
;
8580 int base_name_len
= SBYTES (SYMBOL_NAME (base
));
8581 char *buf
= (char *) alloca (base_name_len
+ 6);
8584 bcopy (SDATA (SYMBOL_NAME (base
)), buf
, base_name_len
);
8585 subsidiaries
= Fmake_vector (make_number (3), Qnil
);
8586 for (i
= 0; i
< 3; i
++)
8588 bcopy (suffixes
[i
], buf
+ base_name_len
, strlen (suffixes
[i
]) + 1);
8589 ASET (subsidiaries
, i
, intern (buf
));
8591 return subsidiaries
;
8595 DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal
,
8596 Sdefine_coding_system_internal
, coding_arg_max
, MANY
, 0,
8597 doc
: /* For internal use only.
8598 usage: (define-coding-system-internal ...) */)
8604 Lisp_Object spec_vec
; /* [ ATTRS ALIASE EOL_TYPE ] */
8605 Lisp_Object attrs
; /* Vector of attributes. */
8606 Lisp_Object eol_type
;
8607 Lisp_Object aliases
;
8608 Lisp_Object coding_type
, charset_list
, safe_charsets
;
8609 enum coding_category category
;
8610 Lisp_Object tail
, val
;
8611 int max_charset_id
= 0;
8614 if (nargs
< coding_arg_max
)
8617 attrs
= Fmake_vector (make_number (coding_attr_last_index
), Qnil
);
8619 name
= args
[coding_arg_name
];
8620 CHECK_SYMBOL (name
);
8621 CODING_ATTR_BASE_NAME (attrs
) = name
;
8623 val
= args
[coding_arg_mnemonic
];
8624 if (! STRINGP (val
))
8625 CHECK_CHARACTER (val
);
8626 CODING_ATTR_MNEMONIC (attrs
) = val
;
8628 coding_type
= args
[coding_arg_coding_type
];
8629 CHECK_SYMBOL (coding_type
);
8630 CODING_ATTR_TYPE (attrs
) = coding_type
;
8632 charset_list
= args
[coding_arg_charset_list
];
8633 if (SYMBOLP (charset_list
))
8635 if (EQ (charset_list
, Qiso_2022
))
8637 if (! EQ (coding_type
, Qiso_2022
))
8638 error ("Invalid charset-list");
8639 charset_list
= Viso_2022_charset_list
;
8641 else if (EQ (charset_list
, Qemacs_mule
))
8643 if (! EQ (coding_type
, Qemacs_mule
))
8644 error ("Invalid charset-list");
8645 charset_list
= Vemacs_mule_charset_list
;
8647 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
8648 if (max_charset_id
< XFASTINT (XCAR (tail
)))
8649 max_charset_id
= XFASTINT (XCAR (tail
));
8653 charset_list
= Fcopy_sequence (charset_list
);
8654 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
8656 struct charset
*charset
;
8659 CHECK_CHARSET_GET_CHARSET (val
, charset
);
8660 if (EQ (coding_type
, Qiso_2022
)
8661 ? CHARSET_ISO_FINAL (charset
) < 0
8662 : EQ (coding_type
, Qemacs_mule
)
8663 ? CHARSET_EMACS_MULE_ID (charset
) < 0
8665 error ("Can't handle charset `%s'",
8666 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
8668 XSETCAR (tail
, make_number (charset
->id
));
8669 if (max_charset_id
< charset
->id
)
8670 max_charset_id
= charset
->id
;
8673 CODING_ATTR_CHARSET_LIST (attrs
) = charset_list
;
8675 safe_charsets
= Fmake_string (make_number (max_charset_id
+ 1),
8677 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
8678 SSET (safe_charsets
, XFASTINT (XCAR (tail
)), 0);
8679 CODING_ATTR_SAFE_CHARSETS (attrs
) = safe_charsets
;
8681 CODING_ATTR_ASCII_COMPAT (attrs
) = args
[coding_arg_ascii_compatible_p
];
8683 val
= args
[coding_arg_decode_translation_table
];
8684 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
8686 CODING_ATTR_DECODE_TBL (attrs
) = val
;
8688 val
= args
[coding_arg_encode_translation_table
];
8689 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
8691 CODING_ATTR_ENCODE_TBL (attrs
) = val
;
8693 val
= args
[coding_arg_post_read_conversion
];
8695 CODING_ATTR_POST_READ (attrs
) = val
;
8697 val
= args
[coding_arg_pre_write_conversion
];
8699 CODING_ATTR_PRE_WRITE (attrs
) = val
;
8701 val
= args
[coding_arg_default_char
];
8703 CODING_ATTR_DEFAULT_CHAR (attrs
) = make_number (' ');
8706 CHECK_CHARACTER (val
);
8707 CODING_ATTR_DEFAULT_CHAR (attrs
) = val
;
8710 val
= args
[coding_arg_for_unibyte
];
8711 CODING_ATTR_FOR_UNIBYTE (attrs
) = NILP (val
) ? Qnil
: Qt
;
8713 val
= args
[coding_arg_plist
];
8715 CODING_ATTR_PLIST (attrs
) = val
;
8717 if (EQ (coding_type
, Qcharset
))
8719 /* Generate a lisp vector of 256 elements. Each element is nil,
8720 integer, or a list of charset IDs.
8722 If Nth element is nil, the byte code N is invalid in this
8725 If Nth element is a number NUM, N is the first byte of a
8726 charset whose ID is NUM.
8728 If Nth element is a list of charset IDs, N is the first byte
8729 of one of them. The list is sorted by dimensions of the
8730 charsets. A charset of smaller dimension comes firtst. */
8731 val
= Fmake_vector (make_number (256), Qnil
);
8733 for (tail
= charset_list
; CONSP (tail
); tail
= XCDR (tail
))
8735 struct charset
*charset
= CHARSET_FROM_ID (XFASTINT (XCAR (tail
)));
8736 int dim
= CHARSET_DIMENSION (charset
);
8737 int idx
= (dim
- 1) * 4;
8739 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
8740 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
8742 for (i
= charset
->code_space
[idx
];
8743 i
<= charset
->code_space
[idx
+ 1]; i
++)
8745 Lisp_Object tmp
, tmp2
;
8748 tmp
= AREF (val
, i
);
8751 else if (NUMBERP (tmp
))
8753 dim2
= CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (tmp
)));
8755 tmp
= Fcons (XCAR (tail
), Fcons (tmp
, Qnil
));
8757 tmp
= Fcons (tmp
, Fcons (XCAR (tail
), Qnil
));
8761 for (tmp2
= tmp
; CONSP (tmp2
); tmp2
= XCDR (tmp2
))
8763 dim2
= CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (XCAR (tmp2
))));
8768 tmp
= nconc2 (tmp
, Fcons (XCAR (tail
), Qnil
));
8771 XSETCDR (tmp2
, Fcons (XCAR (tmp2
), XCDR (tmp2
)));
8772 XSETCAR (tmp2
, XCAR (tail
));
8778 ASET (attrs
, coding_attr_charset_valids
, val
);
8779 category
= coding_category_charset
;
8781 else if (EQ (coding_type
, Qccl
))
8785 if (nargs
< coding_arg_ccl_max
)
8788 val
= args
[coding_arg_ccl_decoder
];
8789 CHECK_CCL_PROGRAM (val
);
8791 val
= Fcopy_sequence (val
);
8792 ASET (attrs
, coding_attr_ccl_decoder
, val
);
8794 val
= args
[coding_arg_ccl_encoder
];
8795 CHECK_CCL_PROGRAM (val
);
8797 val
= Fcopy_sequence (val
);
8798 ASET (attrs
, coding_attr_ccl_encoder
, val
);
8800 val
= args
[coding_arg_ccl_valids
];
8801 valids
= Fmake_string (make_number (256), make_number (0));
8802 for (tail
= val
; !NILP (tail
); tail
= Fcdr (tail
))
8809 from
= to
= XINT (val
);
8810 if (from
< 0 || from
> 255)
8811 args_out_of_range_3 (val
, make_number (0), make_number (255));
8816 CHECK_NATNUM_CAR (val
);
8817 CHECK_NATNUM_CDR (val
);
8818 from
= XINT (XCAR (val
));
8820 args_out_of_range_3 (XCAR (val
),
8821 make_number (0), make_number (255));
8822 to
= XINT (XCDR (val
));
8823 if (to
< from
|| to
> 255)
8824 args_out_of_range_3 (XCDR (val
),
8825 XCAR (val
), make_number (255));
8827 for (i
= from
; i
<= to
; i
++)
8828 SSET (valids
, i
, 1);
8830 ASET (attrs
, coding_attr_ccl_valids
, valids
);
8832 category
= coding_category_ccl
;
8834 else if (EQ (coding_type
, Qutf_16
))
8836 Lisp_Object bom
, endian
;
8838 CODING_ATTR_ASCII_COMPAT (attrs
) = Qnil
;
8840 if (nargs
< coding_arg_utf16_max
)
8843 bom
= args
[coding_arg_utf16_bom
];
8844 if (! NILP (bom
) && ! EQ (bom
, Qt
))
8848 CHECK_CODING_SYSTEM (val
);
8850 CHECK_CODING_SYSTEM (val
);
8852 ASET (attrs
, coding_attr_utf_16_bom
, bom
);
8854 endian
= args
[coding_arg_utf16_endian
];
8855 CHECK_SYMBOL (endian
);
8858 else if (! EQ (endian
, Qbig
) && ! EQ (endian
, Qlittle
))
8859 error ("Invalid endian: %s", SDATA (SYMBOL_NAME (endian
)));
8860 ASET (attrs
, coding_attr_utf_16_endian
, endian
);
8862 category
= (CONSP (bom
)
8863 ? coding_category_utf_16_auto
8865 ? (EQ (endian
, Qbig
)
8866 ? coding_category_utf_16_be_nosig
8867 : coding_category_utf_16_le_nosig
)
8868 : (EQ (endian
, Qbig
)
8869 ? coding_category_utf_16_be
8870 : coding_category_utf_16_le
));
8872 else if (EQ (coding_type
, Qiso_2022
))
8874 Lisp_Object initial
, reg_usage
, request
, flags
;
8877 if (nargs
< coding_arg_iso2022_max
)
8880 initial
= Fcopy_sequence (args
[coding_arg_iso2022_initial
]);
8881 CHECK_VECTOR (initial
);
8882 for (i
= 0; i
< 4; i
++)
8884 val
= Faref (initial
, make_number (i
));
8887 struct charset
*charset
;
8889 CHECK_CHARSET_GET_CHARSET (val
, charset
);
8890 ASET (initial
, i
, make_number (CHARSET_ID (charset
)));
8891 if (i
== 0 && CHARSET_ASCII_COMPATIBLE_P (charset
))
8892 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
8895 ASET (initial
, i
, make_number (-1));
8898 reg_usage
= args
[coding_arg_iso2022_reg_usage
];
8899 CHECK_CONS (reg_usage
);
8900 CHECK_NUMBER_CAR (reg_usage
);
8901 CHECK_NUMBER_CDR (reg_usage
);
8903 request
= Fcopy_sequence (args
[coding_arg_iso2022_request
]);
8904 for (tail
= request
; ! NILP (tail
); tail
= Fcdr (tail
))
8912 CHECK_CHARSET_GET_ID (tmp
, id
);
8913 CHECK_NATNUM_CDR (val
);
8914 if (XINT (XCDR (val
)) >= 4)
8915 error ("Invalid graphic register number: %d", XINT (XCDR (val
)));
8916 XSETCAR (val
, make_number (id
));
8919 flags
= args
[coding_arg_iso2022_flags
];
8920 CHECK_NATNUM (flags
);
8922 if (EQ (args
[coding_arg_charset_list
], Qiso_2022
))
8923 flags
= make_number (i
| CODING_ISO_FLAG_FULL_SUPPORT
);
8925 ASET (attrs
, coding_attr_iso_initial
, initial
);
8926 ASET (attrs
, coding_attr_iso_usage
, reg_usage
);
8927 ASET (attrs
, coding_attr_iso_request
, request
);
8928 ASET (attrs
, coding_attr_iso_flags
, flags
);
8929 setup_iso_safe_charsets (attrs
);
8931 if (i
& CODING_ISO_FLAG_SEVEN_BITS
)
8932 category
= ((i
& (CODING_ISO_FLAG_LOCKING_SHIFT
8933 | CODING_ISO_FLAG_SINGLE_SHIFT
))
8934 ? coding_category_iso_7_else
8935 : EQ (args
[coding_arg_charset_list
], Qiso_2022
)
8936 ? coding_category_iso_7
8937 : coding_category_iso_7_tight
);
8940 int id
= XINT (AREF (initial
, 1));
8942 category
= (((i
& CODING_ISO_FLAG_LOCKING_SHIFT
)
8943 || EQ (args
[coding_arg_charset_list
], Qiso_2022
)
8945 ? coding_category_iso_8_else
8946 : (CHARSET_DIMENSION (CHARSET_FROM_ID (id
)) == 1)
8947 ? coding_category_iso_8_1
8948 : coding_category_iso_8_2
);
8950 if (category
!= coding_category_iso_8_1
8951 && category
!= coding_category_iso_8_2
)
8952 CODING_ATTR_ASCII_COMPAT (attrs
) = Qnil
;
8954 else if (EQ (coding_type
, Qemacs_mule
))
8956 if (EQ (args
[coding_arg_charset_list
], Qemacs_mule
))
8957 ASET (attrs
, coding_attr_emacs_mule_full
, Qt
);
8958 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
8959 category
= coding_category_emacs_mule
;
8961 else if (EQ (coding_type
, Qshift_jis
))
8964 struct charset
*charset
;
8966 if (XINT (Flength (charset_list
)) != 3
8967 && XINT (Flength (charset_list
)) != 4)
8968 error ("There should be three or four charsets");
8970 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
8971 if (CHARSET_DIMENSION (charset
) != 1)
8972 error ("Dimension of charset %s is not one",
8973 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
8974 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
8975 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
8977 charset_list
= XCDR (charset_list
);
8978 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
8979 if (CHARSET_DIMENSION (charset
) != 1)
8980 error ("Dimension of charset %s is not one",
8981 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
8983 charset_list
= XCDR (charset_list
);
8984 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
8985 if (CHARSET_DIMENSION (charset
) != 2)
8986 error ("Dimension of charset %s is not two",
8987 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
8989 charset_list
= XCDR (charset_list
);
8990 if (! NILP (charset_list
))
8992 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
8993 if (CHARSET_DIMENSION (charset
) != 2)
8994 error ("Dimension of charset %s is not two",
8995 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
8998 category
= coding_category_sjis
;
8999 Vsjis_coding_system
= name
;
9001 else if (EQ (coding_type
, Qbig5
))
9003 struct charset
*charset
;
9005 if (XINT (Flength (charset_list
)) != 2)
9006 error ("There should be just two charsets");
9008 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
9009 if (CHARSET_DIMENSION (charset
) != 1)
9010 error ("Dimension of charset %s is not one",
9011 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
9012 if (CHARSET_ASCII_COMPATIBLE_P (charset
))
9013 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
9015 charset_list
= XCDR (charset_list
);
9016 charset
= CHARSET_FROM_ID (XINT (XCAR (charset_list
)));
9017 if (CHARSET_DIMENSION (charset
) != 2)
9018 error ("Dimension of charset %s is not two",
9019 SDATA (SYMBOL_NAME (CHARSET_NAME (charset
))));
9021 category
= coding_category_big5
;
9022 Vbig5_coding_system
= name
;
9024 else if (EQ (coding_type
, Qraw_text
))
9026 category
= coding_category_raw_text
;
9027 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
9029 else if (EQ (coding_type
, Qutf_8
))
9031 category
= coding_category_utf_8
;
9032 CODING_ATTR_ASCII_COMPAT (attrs
) = Qt
;
9034 else if (EQ (coding_type
, Qundecided
))
9035 category
= coding_category_undecided
;
9037 error ("Invalid coding system type: %s",
9038 SDATA (SYMBOL_NAME (coding_type
)));
9040 CODING_ATTR_CATEGORY (attrs
) = make_number (category
);
9041 CODING_ATTR_PLIST (attrs
)
9042 = Fcons (QCcategory
, Fcons (AREF (Vcoding_category_table
, category
),
9043 CODING_ATTR_PLIST (attrs
)));
9044 CODING_ATTR_PLIST (attrs
)
9045 = Fcons (QCascii_compatible_p
,
9046 Fcons (CODING_ATTR_ASCII_COMPAT (attrs
),
9047 CODING_ATTR_PLIST (attrs
)));
9049 eol_type
= args
[coding_arg_eol_type
];
9050 if (! NILP (eol_type
)
9051 && ! EQ (eol_type
, Qunix
)
9052 && ! EQ (eol_type
, Qdos
)
9053 && ! EQ (eol_type
, Qmac
))
9054 error ("Invalid eol-type");
9056 aliases
= Fcons (name
, Qnil
);
9058 if (NILP (eol_type
))
9060 eol_type
= make_subsidiaries (name
);
9061 for (i
= 0; i
< 3; i
++)
9063 Lisp_Object this_spec
, this_name
, this_aliases
, this_eol_type
;
9065 this_name
= AREF (eol_type
, i
);
9066 this_aliases
= Fcons (this_name
, Qnil
);
9067 this_eol_type
= (i
== 0 ? Qunix
: i
== 1 ? Qdos
: Qmac
);
9068 this_spec
= Fmake_vector (make_number (3), attrs
);
9069 ASET (this_spec
, 1, this_aliases
);
9070 ASET (this_spec
, 2, this_eol_type
);
9071 Fputhash (this_name
, this_spec
, Vcoding_system_hash_table
);
9072 Vcoding_system_list
= Fcons (this_name
, Vcoding_system_list
);
9073 val
= Fassoc (Fsymbol_name (this_name
), Vcoding_system_alist
);
9075 Vcoding_system_alist
9076 = Fcons (Fcons (Fsymbol_name (this_name
), Qnil
),
9077 Vcoding_system_alist
);
9081 spec_vec
= Fmake_vector (make_number (3), attrs
);
9082 ASET (spec_vec
, 1, aliases
);
9083 ASET (spec_vec
, 2, eol_type
);
9085 Fputhash (name
, spec_vec
, Vcoding_system_hash_table
);
9086 Vcoding_system_list
= Fcons (name
, Vcoding_system_list
);
9087 val
= Fassoc (Fsymbol_name (name
), Vcoding_system_alist
);
9089 Vcoding_system_alist
= Fcons (Fcons (Fsymbol_name (name
), Qnil
),
9090 Vcoding_system_alist
);
9093 int id
= coding_categories
[category
].id
;
9095 if (id
< 0 || EQ (name
, CODING_ID_NAME (id
)))
9096 setup_coding_system (name
, &coding_categories
[category
]);
9102 return Fsignal (Qwrong_number_of_arguments
,
9103 Fcons (intern ("define-coding-system-internal"),
9104 make_number (nargs
)));
9108 DEFUN ("coding-system-put", Fcoding_system_put
, Scoding_system_put
,
9110 doc
: /* Change value in CODING-SYSTEM's property list PROP to VAL. */)
9111 (coding_system
, prop
, val
)
9112 Lisp_Object coding_system
, prop
, val
;
9114 Lisp_Object spec
, attrs
;
9116 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
9117 attrs
= AREF (spec
, 0);
9118 if (EQ (prop
, QCmnemonic
))
9120 if (! STRINGP (val
))
9121 CHECK_CHARACTER (val
);
9122 CODING_ATTR_MNEMONIC (attrs
) = val
;
9124 else if (EQ (prop
, QCdefalut_char
))
9127 val
= make_number (' ');
9129 CHECK_CHARACTER (val
);
9130 CODING_ATTR_DEFAULT_CHAR (attrs
) = val
;
9132 else if (EQ (prop
, QCdecode_translation_table
))
9134 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
9136 CODING_ATTR_DECODE_TBL (attrs
) = val
;
9138 else if (EQ (prop
, QCencode_translation_table
))
9140 if (! CHAR_TABLE_P (val
) && ! CONSP (val
))
9142 CODING_ATTR_ENCODE_TBL (attrs
) = val
;
9144 else if (EQ (prop
, QCpost_read_conversion
))
9147 CODING_ATTR_POST_READ (attrs
) = val
;
9149 else if (EQ (prop
, QCpre_write_conversion
))
9152 CODING_ATTR_PRE_WRITE (attrs
) = val
;
9154 else if (EQ (prop
, QCascii_compatible_p
))
9156 CODING_ATTR_ASCII_COMPAT (attrs
) = val
;
9159 CODING_ATTR_PLIST (attrs
)
9160 = Fplist_put (CODING_ATTR_PLIST (attrs
), prop
, val
);
9165 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias
,
9166 Sdefine_coding_system_alias
, 2, 2, 0,
9167 doc
: /* Define ALIAS as an alias for CODING-SYSTEM. */)
9168 (alias
, coding_system
)
9169 Lisp_Object alias
, coding_system
;
9171 Lisp_Object spec
, aliases
, eol_type
, val
;
9173 CHECK_SYMBOL (alias
);
9174 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
9175 aliases
= AREF (spec
, 1);
9176 /* ALISES should be a list of length more than zero, and the first
9177 element is a base coding system. Append ALIAS at the tail of the
9179 while (!NILP (XCDR (aliases
)))
9180 aliases
= XCDR (aliases
);
9181 XSETCDR (aliases
, Fcons (alias
, Qnil
));
9183 eol_type
= AREF (spec
, 2);
9184 if (VECTORP (eol_type
))
9186 Lisp_Object subsidiaries
;
9189 subsidiaries
= make_subsidiaries (alias
);
9190 for (i
= 0; i
< 3; i
++)
9191 Fdefine_coding_system_alias (AREF (subsidiaries
, i
),
9192 AREF (eol_type
, i
));
9195 Fputhash (alias
, spec
, Vcoding_system_hash_table
);
9196 Vcoding_system_list
= Fcons (alias
, Vcoding_system_list
);
9197 val
= Fassoc (Fsymbol_name (alias
), Vcoding_system_alist
);
9199 Vcoding_system_alist
= Fcons (Fcons (Fsymbol_name (alias
), Qnil
),
9200 Vcoding_system_alist
);
9205 DEFUN ("coding-system-base", Fcoding_system_base
, Scoding_system_base
,
9207 doc
: /* Return the base of CODING-SYSTEM.
9208 Any alias or subsidiary coding system is not a base coding system. */)
9210 Lisp_Object coding_system
;
9212 Lisp_Object spec
, attrs
;
9214 if (NILP (coding_system
))
9215 return (Qno_conversion
);
9216 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
9217 attrs
= AREF (spec
, 0);
9218 return CODING_ATTR_BASE_NAME (attrs
);
9221 DEFUN ("coding-system-plist", Fcoding_system_plist
, Scoding_system_plist
,
9223 doc
: "Return the property list of CODING-SYSTEM.")
9225 Lisp_Object coding_system
;
9227 Lisp_Object spec
, attrs
;
9229 if (NILP (coding_system
))
9230 coding_system
= Qno_conversion
;
9231 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
9232 attrs
= AREF (spec
, 0);
9233 return CODING_ATTR_PLIST (attrs
);
9237 DEFUN ("coding-system-aliases", Fcoding_system_aliases
, Scoding_system_aliases
,
9239 doc
: /* Return the list of aliases of CODING-SYSTEM. */)
9241 Lisp_Object coding_system
;
9245 if (NILP (coding_system
))
9246 coding_system
= Qno_conversion
;
9247 CHECK_CODING_SYSTEM_GET_SPEC (coding_system
, spec
);
9248 return AREF (spec
, 1);
9251 DEFUN ("coding-system-eol-type", Fcoding_system_eol_type
,
9252 Scoding_system_eol_type
, 1, 1, 0,
9253 doc
: /* Return eol-type of CODING-SYSTEM.
9254 An eol-type is integer 0, 1, 2, or a vector of coding systems.
9256 Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF,
9257 and CR respectively.
9259 A vector value indicates that a format of end-of-line should be
9260 detected automatically. Nth element of the vector is the subsidiary
9261 coding system whose eol-type is N. */)
9263 Lisp_Object coding_system
;
9265 Lisp_Object spec
, eol_type
;
9268 if (NILP (coding_system
))
9269 coding_system
= Qno_conversion
;
9270 if (! CODING_SYSTEM_P (coding_system
))
9272 spec
= CODING_SYSTEM_SPEC (coding_system
);
9273 eol_type
= AREF (spec
, 2);
9274 if (VECTORP (eol_type
))
9275 return Fcopy_sequence (eol_type
);
9276 n
= EQ (eol_type
, Qunix
) ? 0 : EQ (eol_type
, Qdos
) ? 1 : 2;
9277 return make_number (n
);
9283 /*** 9. Post-amble ***/
9290 for (i
= 0; i
< coding_category_max
; i
++)
9292 coding_categories
[i
].id
= -1;
9293 coding_priorities
[i
] = i
;
9296 /* ISO2022 specific initialize routine. */
9297 for (i
= 0; i
< 0x20; i
++)
9298 iso_code_class
[i
] = ISO_control_0
;
9299 for (i
= 0x21; i
< 0x7F; i
++)
9300 iso_code_class
[i
] = ISO_graphic_plane_0
;
9301 for (i
= 0x80; i
< 0xA0; i
++)
9302 iso_code_class
[i
] = ISO_control_1
;
9303 for (i
= 0xA1; i
< 0xFF; i
++)
9304 iso_code_class
[i
] = ISO_graphic_plane_1
;
9305 iso_code_class
[0x20] = iso_code_class
[0x7F] = ISO_0x20_or_0x7F
;
9306 iso_code_class
[0xA0] = iso_code_class
[0xFF] = ISO_0xA0_or_0xFF
;
9307 iso_code_class
[ISO_CODE_SO
] = ISO_shift_out
;
9308 iso_code_class
[ISO_CODE_SI
] = ISO_shift_in
;
9309 iso_code_class
[ISO_CODE_SS2_7
] = ISO_single_shift_2_7
;
9310 iso_code_class
[ISO_CODE_ESC
] = ISO_escape
;
9311 iso_code_class
[ISO_CODE_SS2
] = ISO_single_shift_2
;
9312 iso_code_class
[ISO_CODE_SS3
] = ISO_single_shift_3
;
9313 iso_code_class
[ISO_CODE_CSI
] = ISO_control_sequence_introducer
;
9315 for (i
= 0; i
< 256; i
++)
9317 emacs_mule_bytes
[i
] = 1;
9319 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_11
] = 3;
9320 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_12
] = 3;
9321 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_21
] = 4;
9322 emacs_mule_bytes
[EMACS_MULE_LEADING_CODE_PRIVATE_22
] = 4;
9330 staticpro (&Vcoding_system_hash_table
);
9332 Lisp_Object args
[2];
9335 Vcoding_system_hash_table
= Fmake_hash_table (2, args
);
9338 staticpro (&Vsjis_coding_system
);
9339 Vsjis_coding_system
= Qnil
;
9341 staticpro (&Vbig5_coding_system
);
9342 Vbig5_coding_system
= Qnil
;
9344 staticpro (&Vcode_conversion_reused_workbuf
);
9345 Vcode_conversion_reused_workbuf
= Qnil
;
9347 staticpro (&Vcode_conversion_workbuf_name
);
9348 Vcode_conversion_workbuf_name
= build_string (" *code-conversion-work*");
9350 reused_workbuf_in_use
= 0;
9352 DEFSYM (Qcharset
, "charset");
9353 DEFSYM (Qtarget_idx
, "target-idx");
9354 DEFSYM (Qcoding_system_history
, "coding-system-history");
9355 Fset (Qcoding_system_history
, Qnil
);
9357 /* Target FILENAME is the first argument. */
9358 Fput (Qinsert_file_contents
, Qtarget_idx
, make_number (0));
9359 /* Target FILENAME is the third argument. */
9360 Fput (Qwrite_region
, Qtarget_idx
, make_number (2));
9362 DEFSYM (Qcall_process
, "call-process");
9363 /* Target PROGRAM is the first argument. */
9364 Fput (Qcall_process
, Qtarget_idx
, make_number (0));
9366 DEFSYM (Qcall_process_region
, "call-process-region");
9367 /* Target PROGRAM is the third argument. */
9368 Fput (Qcall_process_region
, Qtarget_idx
, make_number (2));
9370 DEFSYM (Qstart_process
, "start-process");
9371 /* Target PROGRAM is the third argument. */
9372 Fput (Qstart_process
, Qtarget_idx
, make_number (2));
9374 DEFSYM (Qopen_network_stream
, "open-network-stream");
9375 /* Target SERVICE is the fourth argument. */
9376 Fput (Qopen_network_stream
, Qtarget_idx
, make_number (3));
9378 DEFSYM (Qcoding_system
, "coding-system");
9379 DEFSYM (Qcoding_aliases
, "coding-aliases");
9381 DEFSYM (Qeol_type
, "eol-type");
9382 DEFSYM (Qunix
, "unix");
9383 DEFSYM (Qdos
, "dos");
9385 DEFSYM (Qbuffer_file_coding_system
, "buffer-file-coding-system");
9386 DEFSYM (Qpost_read_conversion
, "post-read-conversion");
9387 DEFSYM (Qpre_write_conversion
, "pre-write-conversion");
9388 DEFSYM (Qdefault_char
, "default-char");
9389 DEFSYM (Qundecided
, "undecided");
9390 DEFSYM (Qno_conversion
, "no-conversion");
9391 DEFSYM (Qraw_text
, "raw-text");
9393 DEFSYM (Qiso_2022
, "iso-2022");
9395 DEFSYM (Qutf_8
, "utf-8");
9396 DEFSYM (Qutf_8_emacs
, "utf-8-emacs");
9398 DEFSYM (Qutf_16
, "utf-16");
9399 DEFSYM (Qbig
, "big");
9400 DEFSYM (Qlittle
, "little");
9402 DEFSYM (Qshift_jis
, "shift-jis");
9403 DEFSYM (Qbig5
, "big5");
9405 DEFSYM (Qcoding_system_p
, "coding-system-p");
9407 DEFSYM (Qcoding_system_error
, "coding-system-error");
9408 Fput (Qcoding_system_error
, Qerror_conditions
,
9409 Fcons (Qcoding_system_error
, Fcons (Qerror
, Qnil
)));
9410 Fput (Qcoding_system_error
, Qerror_message
,
9411 build_string ("Invalid coding system"));
9413 /* Intern this now in case it isn't already done.
9414 Setting this variable twice is harmless.
9415 But don't staticpro it here--that is done in alloc.c. */
9416 Qchar_table_extra_slots
= intern ("char-table-extra-slots");
9418 DEFSYM (Qtranslation_table
, "translation-table");
9419 Fput (Qtranslation_table
, Qchar_table_extra_slots
, make_number (2));
9420 DEFSYM (Qtranslation_table_id
, "translation-table-id");
9421 DEFSYM (Qtranslation_table_for_decode
, "translation-table-for-decode");
9422 DEFSYM (Qtranslation_table_for_encode
, "translation-table-for-encode");
9424 DEFSYM (Qvalid_codes
, "valid-codes");
9426 DEFSYM (Qemacs_mule
, "emacs-mule");
9428 DEFSYM (QCcategory
, ":category");
9429 DEFSYM (QCmnemonic
, ":mnemonic");
9430 DEFSYM (QCdefalut_char
, ":default-char");
9431 DEFSYM (QCdecode_translation_table
, ":decode-translation-table");
9432 DEFSYM (QCencode_translation_table
, ":encode-translation-table");
9433 DEFSYM (QCpost_read_conversion
, ":post-read-conversion");
9434 DEFSYM (QCpre_write_conversion
, ":pre-write-conversion");
9435 DEFSYM (QCascii_compatible_p
, ":ascii-compatible-p");
9437 Vcoding_category_table
9438 = Fmake_vector (make_number (coding_category_max
), Qnil
);
9439 staticpro (&Vcoding_category_table
);
9440 /* Followings are target of code detection. */
9441 ASET (Vcoding_category_table
, coding_category_iso_7
,
9442 intern ("coding-category-iso-7"));
9443 ASET (Vcoding_category_table
, coding_category_iso_7_tight
,
9444 intern ("coding-category-iso-7-tight"));
9445 ASET (Vcoding_category_table
, coding_category_iso_8_1
,
9446 intern ("coding-category-iso-8-1"));
9447 ASET (Vcoding_category_table
, coding_category_iso_8_2
,
9448 intern ("coding-category-iso-8-2"));
9449 ASET (Vcoding_category_table
, coding_category_iso_7_else
,
9450 intern ("coding-category-iso-7-else"));
9451 ASET (Vcoding_category_table
, coding_category_iso_8_else
,
9452 intern ("coding-category-iso-8-else"));
9453 ASET (Vcoding_category_table
, coding_category_utf_8
,
9454 intern ("coding-category-utf-8"));
9455 ASET (Vcoding_category_table
, coding_category_utf_16_be
,
9456 intern ("coding-category-utf-16-be"));
9457 ASET (Vcoding_category_table
, coding_category_utf_16_auto
,
9458 intern ("coding-category-utf-16-auto"));
9459 ASET (Vcoding_category_table
, coding_category_utf_16_le
,
9460 intern ("coding-category-utf-16-le"));
9461 ASET (Vcoding_category_table
, coding_category_utf_16_be_nosig
,
9462 intern ("coding-category-utf-16-be-nosig"));
9463 ASET (Vcoding_category_table
, coding_category_utf_16_le_nosig
,
9464 intern ("coding-category-utf-16-le-nosig"));
9465 ASET (Vcoding_category_table
, coding_category_charset
,
9466 intern ("coding-category-charset"));
9467 ASET (Vcoding_category_table
, coding_category_sjis
,
9468 intern ("coding-category-sjis"));
9469 ASET (Vcoding_category_table
, coding_category_big5
,
9470 intern ("coding-category-big5"));
9471 ASET (Vcoding_category_table
, coding_category_ccl
,
9472 intern ("coding-category-ccl"));
9473 ASET (Vcoding_category_table
, coding_category_emacs_mule
,
9474 intern ("coding-category-emacs-mule"));
9475 /* Followings are NOT target of code detection. */
9476 ASET (Vcoding_category_table
, coding_category_raw_text
,
9477 intern ("coding-category-raw-text"));
9478 ASET (Vcoding_category_table
, coding_category_undecided
,
9479 intern ("coding-category-undecided"));
9481 DEFSYM (Qinsufficient_source
, "insufficient-source");
9482 DEFSYM (Qinconsistent_eol
, "inconsistent-eol");
9483 DEFSYM (Qinvalid_source
, "invalid-source");
9484 DEFSYM (Qinterrupted
, "interrupted");
9485 DEFSYM (Qinsufficient_memory
, "insufficient-memory");
9486 DEFSYM (Qcoding_system_define_form
, "coding-system-define-form");
9488 defsubr (&Scoding_system_p
);
9489 defsubr (&Sread_coding_system
);
9490 defsubr (&Sread_non_nil_coding_system
);
9491 defsubr (&Scheck_coding_system
);
9492 defsubr (&Sdetect_coding_region
);
9493 defsubr (&Sdetect_coding_string
);
9494 defsubr (&Sfind_coding_systems_region_internal
);
9495 defsubr (&Sunencodable_char_position
);
9496 defsubr (&Scheck_coding_systems_region
);
9497 defsubr (&Sdecode_coding_region
);
9498 defsubr (&Sencode_coding_region
);
9499 defsubr (&Sdecode_coding_string
);
9500 defsubr (&Sencode_coding_string
);
9501 defsubr (&Sdecode_sjis_char
);
9502 defsubr (&Sencode_sjis_char
);
9503 defsubr (&Sdecode_big5_char
);
9504 defsubr (&Sencode_big5_char
);
9505 defsubr (&Sset_terminal_coding_system_internal
);
9506 defsubr (&Sset_safe_terminal_coding_system_internal
);
9507 defsubr (&Sterminal_coding_system
);
9508 defsubr (&Sset_keyboard_coding_system_internal
);
9509 defsubr (&Skeyboard_coding_system
);
9510 defsubr (&Sfind_operation_coding_system
);
9511 defsubr (&Sset_coding_system_priority
);
9512 defsubr (&Sdefine_coding_system_internal
);
9513 defsubr (&Sdefine_coding_system_alias
);
9514 defsubr (&Scoding_system_put
);
9515 defsubr (&Scoding_system_base
);
9516 defsubr (&Scoding_system_plist
);
9517 defsubr (&Scoding_system_aliases
);
9518 defsubr (&Scoding_system_eol_type
);
9519 defsubr (&Scoding_system_priority_list
);
9521 DEFVAR_LISP ("coding-system-list", &Vcoding_system_list
,
9522 doc
: /* List of coding systems.
9524 Do not alter the value of this variable manually. This variable should be
9525 updated by the functions `define-coding-system' and
9526 `define-coding-system-alias'. */);
9527 Vcoding_system_list
= Qnil
;
9529 DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist
,
9530 doc
: /* Alist of coding system names.
9531 Each element is one element list of coding system name.
9532 This variable is given to `completing-read' as TABLE argument.
9534 Do not alter the value of this variable manually. This variable should be
9535 updated by the functions `make-coding-system' and
9536 `define-coding-system-alias'. */);
9537 Vcoding_system_alist
= Qnil
;
9539 DEFVAR_LISP ("coding-category-list", &Vcoding_category_list
,
9540 doc
: /* List of coding-categories (symbols) ordered by priority.
9542 On detecting a coding system, Emacs tries code detection algorithms
9543 associated with each coding-category one by one in this order. When
9544 one algorithm agrees with a byte sequence of source text, the coding
9545 system bound to the corresponding coding-category is selected.
9547 Don't modify this variable directly, but use `set-coding-priority'. */);
9551 Vcoding_category_list
= Qnil
;
9552 for (i
= coding_category_max
- 1; i
>= 0; i
--)
9553 Vcoding_category_list
9554 = Fcons (XVECTOR (Vcoding_category_table
)->contents
[i
],
9555 Vcoding_category_list
);
9558 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read
,
9559 doc
: /* Specify the coding system for read operations.
9560 It is useful to bind this variable with `let', but do not set it globally.
9561 If the value is a coding system, it is used for decoding on read operation.
9562 If not, an appropriate element is used from one of the coding system alists:
9563 There are three such tables, `file-coding-system-alist',
9564 `process-coding-system-alist', and `network-coding-system-alist'. */);
9565 Vcoding_system_for_read
= Qnil
;
9567 DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write
,
9568 doc
: /* Specify the coding system for write operations.
9569 Programs bind this variable with `let', but you should not set it globally.
9570 If the value is a coding system, it is used for encoding of output,
9571 when writing it to a file and when sending it to a file or subprocess.
9573 If this does not specify a coding system, an appropriate element
9574 is used from one of the coding system alists:
9575 There are three such tables, `file-coding-system-alist',
9576 `process-coding-system-alist', and `network-coding-system-alist'.
9577 For output to files, if the above procedure does not specify a coding system,
9578 the value of `buffer-file-coding-system' is used. */);
9579 Vcoding_system_for_write
= Qnil
;
9581 DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used
,
9583 Coding system used in the latest file or process I/O. */);
9584 Vlast_coding_system_used
= Qnil
;
9586 DEFVAR_LISP ("last-code-conversion-error", &Vlast_code_conversion_error
,
9588 Error status of the last code conversion.
9590 When an error was detected in the last code conversion, this variable
9591 is set to one of the following symbols.
9592 `insufficient-source'
9596 `insufficient-memory'
9597 When no error was detected, the value doesn't change. So, to check
9598 the error status of a code conversion by this variable, you must
9599 explicitly set this variable to nil before performing code
9601 Vlast_code_conversion_error
= Qnil
;
9603 DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion
,
9605 *Non-nil means always inhibit code conversion of end-of-line format.
9606 See info node `Coding Systems' and info node `Text and Binary' concerning
9607 such conversion. */);
9608 inhibit_eol_conversion
= 0;
9610 DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system
,
9612 Non-nil means process buffer inherits coding system of process output.
9613 Bind it to t if the process output is to be treated as if it were a file
9614 read from some filesystem. */);
9615 inherit_process_coding_system
= 0;
9617 DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist
,
9619 Alist to decide a coding system to use for a file I/O operation.
9620 The format is ((PATTERN . VAL) ...),
9621 where PATTERN is a regular expression matching a file name,
9622 VAL is a coding system, a cons of coding systems, or a function symbol.
9623 If VAL is a coding system, it is used for both decoding and encoding
9625 If VAL is a cons of coding systems, the car part is used for decoding,
9626 and the cdr part is used for encoding.
9627 If VAL is a function symbol, the function must return a coding system
9628 or a cons of coding systems which are used as above. The function is
9629 called with an argument that is a list of the arguments with which
9630 `find-operation-coding-system' was called. If the function can't decide
9631 a coding system, it can return `undecided' so that the normal
9632 code-detection is performed.
9634 See also the function `find-operation-coding-system'
9635 and the variable `auto-coding-alist'. */);
9636 Vfile_coding_system_alist
= Qnil
;
9638 DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist
,
9640 Alist to decide a coding system to use for a process I/O operation.
9641 The format is ((PATTERN . VAL) ...),
9642 where PATTERN is a regular expression matching a program name,
9643 VAL is a coding system, a cons of coding systems, or a function symbol.
9644 If VAL is a coding system, it is used for both decoding what received
9645 from the program and encoding what sent to the program.
9646 If VAL is a cons of coding systems, the car part is used for decoding,
9647 and the cdr part is used for encoding.
9648 If VAL is a function symbol, the function must return a coding system
9649 or a cons of coding systems which are used as above.
9651 See also the function `find-operation-coding-system'. */);
9652 Vprocess_coding_system_alist
= Qnil
;
9654 DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist
,
9656 Alist to decide a coding system to use for a network I/O operation.
9657 The format is ((PATTERN . VAL) ...),
9658 where PATTERN is a regular expression matching a network service name
9659 or is a port number to connect to,
9660 VAL is a coding system, a cons of coding systems, or a function symbol.
9661 If VAL is a coding system, it is used for both decoding what received
9662 from the network stream and encoding what sent to the network stream.
9663 If VAL is a cons of coding systems, the car part is used for decoding,
9664 and the cdr part is used for encoding.
9665 If VAL is a function symbol, the function must return a coding system
9666 or a cons of coding systems which are used as above.
9668 See also the function `find-operation-coding-system'. */);
9669 Vnetwork_coding_system_alist
= Qnil
;
9671 DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system
,
9672 doc
: /* Coding system to use with system messages.
9673 Also used for decoding keyboard input on X Window system. */);
9674 Vlocale_coding_system
= Qnil
;
9676 /* The eol mnemonics are reset in startup.el system-dependently. */
9677 DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix
,
9679 *String displayed in mode line for UNIX-like (LF) end-of-line format. */);
9680 eol_mnemonic_unix
= build_string (":");
9682 DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos
,
9684 *String displayed in mode line for DOS-like (CRLF) end-of-line format. */);
9685 eol_mnemonic_dos
= build_string ("\\");
9687 DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac
,
9689 *String displayed in mode line for MAC-like (CR) end-of-line format. */);
9690 eol_mnemonic_mac
= build_string ("/");
9692 DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided
,
9694 *String displayed in mode line when end-of-line format is not yet determined. */);
9695 eol_mnemonic_undecided
= build_string (":");
9697 DEFVAR_LISP ("enable-character-translation", &Venable_character_translation
,
9699 *Non-nil enables character translation while encoding and decoding. */);
9700 Venable_character_translation
= Qt
;
9702 DEFVAR_LISP ("standard-translation-table-for-decode",
9703 &Vstandard_translation_table_for_decode
,
9704 doc
: /* Table for translating characters while decoding. */);
9705 Vstandard_translation_table_for_decode
= Qnil
;
9707 DEFVAR_LISP ("standard-translation-table-for-encode",
9708 &Vstandard_translation_table_for_encode
,
9709 doc
: /* Table for translating characters while encoding. */);
9710 Vstandard_translation_table_for_encode
= Qnil
;
9712 DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table
,
9713 doc
: /* Alist of charsets vs revision numbers.
9714 While encoding, if a charset (car part of an element) is found,
9715 designate it with the escape sequence identifying revision (cdr part
9716 of the element). */);
9717 Vcharset_revision_table
= Qnil
;
9719 DEFVAR_LISP ("default-process-coding-system",
9720 &Vdefault_process_coding_system
,
9721 doc
: /* Cons of coding systems used for process I/O by default.
9722 The car part is used for decoding a process output,
9723 the cdr part is used for encoding a text to be sent to a process. */);
9724 Vdefault_process_coding_system
= Qnil
;
9726 DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table
,
9728 Table of extra Latin codes in the range 128..159 (inclusive).
9729 This is a vector of length 256.
9730 If Nth element is non-nil, the existence of code N in a file
9731 \(or output of subprocess) doesn't prevent it to be detected as
9732 a coding system of ISO 2022 variant which has a flag
9733 `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file
9734 or reading output of a subprocess.
9735 Only 128th through 159th elements has a meaning. */);
9736 Vlatin_extra_code_table
= Fmake_vector (make_number (256), Qnil
);
9738 DEFVAR_LISP ("select-safe-coding-system-function",
9739 &Vselect_safe_coding_system_function
,
9741 Function to call to select safe coding system for encoding a text.
9743 If set, this function is called to force a user to select a proper
9744 coding system which can encode the text in the case that a default
9745 coding system used in each operation can't encode the text.
9747 The default value is `select-safe-coding-system' (which see). */);
9748 Vselect_safe_coding_system_function
= Qnil
;
9750 DEFVAR_BOOL ("coding-system-require-warning",
9751 &coding_system_require_warning
,
9752 doc
: /* Internal use only.
9753 If non-nil, on writing a file, `select-safe-coding-system-function' is
9754 called even if `coding-system-for-write' is non-nil. The command
9755 `universal-coding-system-argument' binds this variable to t temporarily. */);
9756 coding_system_require_warning
= 0;
9759 DEFVAR_BOOL ("inhibit-iso-escape-detection",
9760 &inhibit_iso_escape_detection
,
9762 If non-nil, Emacs ignores ISO2022's escape sequence on code detection.
9764 By default, on reading a file, Emacs tries to detect how the text is
9765 encoded. This code detection is sensitive to escape sequences. If
9766 the sequence is valid as ISO2022, the code is determined as one of
9767 the ISO2022 encodings, and the file is decoded by the corresponding
9768 coding system (e.g. `iso-2022-7bit').
9770 However, there may be a case that you want to read escape sequences in
9771 a file as is. In such a case, you can set this variable to non-nil.
9772 Then, as the code detection ignores any escape sequences, no file is
9773 detected as encoded in some ISO2022 encoding. The result is that all
9774 escape sequences become visible in a buffer.
9776 The default value is nil, and it is strongly recommended not to change
9777 it. That is because many Emacs Lisp source files that contain
9778 non-ASCII characters are encoded by the coding system `iso-2022-7bit'
9779 in Emacs's distribution, and they won't be decoded correctly on
9780 reading if you suppress escape sequence detection.
9782 The other way to read escape sequences in a file without decoding is
9783 to explicitly specify some coding system that doesn't use ISO2022's
9784 escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */);
9785 inhibit_iso_escape_detection
= 0;
9787 DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input
,
9788 doc
: /* Char table for translating self-inserting characters.
9789 This is applied to the result of input methods, not their input. See also
9790 `keyboard-translate-table'. */);
9791 Vtranslation_table_for_input
= Qnil
;
9794 Lisp_Object args
[coding_arg_max
];
9795 Lisp_Object plist
[16];
9798 for (i
= 0; i
< coding_arg_max
; i
++)
9801 plist
[0] = intern (":name");
9802 plist
[1] = args
[coding_arg_name
] = Qno_conversion
;
9803 plist
[2] = intern (":mnemonic");
9804 plist
[3] = args
[coding_arg_mnemonic
] = make_number ('=');
9805 plist
[4] = intern (":coding-type");
9806 plist
[5] = args
[coding_arg_coding_type
] = Qraw_text
;
9807 plist
[6] = intern (":ascii-compatible-p");
9808 plist
[7] = args
[coding_arg_ascii_compatible_p
] = Qt
;
9809 plist
[8] = intern (":default-char");
9810 plist
[9] = args
[coding_arg_default_char
] = make_number (0);
9811 plist
[10] = intern (":for-unibyte");
9812 plist
[11] = args
[coding_arg_for_unibyte
] = Qt
;
9813 plist
[12] = intern (":docstring");
9814 plist
[13] = build_string ("Do no conversion.\n\
9816 When you visit a file with this coding, the file is read into a\n\
9817 unibyte buffer as is, thus each byte of a file is treated as a\n\
9819 plist
[14] = intern (":eol-type");
9820 plist
[15] = args
[coding_arg_eol_type
] = Qunix
;
9821 args
[coding_arg_plist
] = Flist (16, plist
);
9822 Fdefine_coding_system_internal (coding_arg_max
, args
);
9824 plist
[1] = args
[coding_arg_name
] = Qundecided
;
9825 plist
[3] = args
[coding_arg_mnemonic
] = make_number ('-');
9826 plist
[5] = args
[coding_arg_coding_type
] = Qundecided
;
9827 /* This is already set.
9828 plist[7] = args[coding_arg_ascii_compatible_p] = Qt; */
9829 plist
[8] = intern (":charset-list");
9830 plist
[9] = args
[coding_arg_charset_list
] = Fcons (Qascii
, Qnil
);
9831 plist
[11] = args
[coding_arg_for_unibyte
] = Qnil
;
9832 plist
[13] = build_string ("No conversion on encoding, automatic conversion on decoding.");
9833 plist
[15] = args
[coding_arg_eol_type
] = Qnil
;
9834 args
[coding_arg_plist
] = Flist (16, plist
);
9835 Fdefine_coding_system_internal (coding_arg_max
, args
);
9838 setup_coding_system (Qno_conversion
, &safe_terminal_coding
);
9843 for (i
= 0; i
< coding_category_max
; i
++)
9844 Fset (AREF (Vcoding_category_table
, i
), Qno_conversion
);
9846 #if defined (MSDOS) || defined (WINDOWSNT)
9847 system_eol_type
= Qdos
;
9849 system_eol_type
= Qunix
;
9851 staticpro (&system_eol_type
);
9855 emacs_strerror (error_number
)
9860 synchronize_system_messages_locale ();
9861 str
= strerror (error_number
);
9863 if (! NILP (Vlocale_coding_system
))
9865 Lisp_Object dec
= code_convert_string_norecord (build_string (str
),
9866 Vlocale_coding_system
,
9868 str
= (char *) SDATA (dec
);
9876 /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d
9877 (do not change this comment) */