/* Coding system handler (conversion, detection, and etc).
- Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
+ Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN.
Licensed to the Free Software Foundation.
This file is part of GNU Emacs.
/*** TABLE OF CONTENTS ***
+ 0. General comments
1. Preamble
2. Emacs' internal format (emacs-mule) handlers
3. ISO2022 handlers
4. Shift-JIS and BIG5 handlers
- 5. End-of-line handlers
- 6. C library functions
- 7. Emacs Lisp library functions
- 8. Post-amble
+ 5. CCL handlers
+ 6. End-of-line handlers
+ 7. C library functions
+ 8. Emacs Lisp library functions
+ 9. Post-amble
*/
+/*** 0. General comments ***/
+
+
/*** GENERAL NOTE on CODING SYSTEM ***
Coding system is an encoding mechanism of one or more character
(Code Conversion Language) programs. Emacs executes the CCL program
while reading/writing.
- Emacs represents a coding-system by a Lisp symbol that has a property
- `coding-system'. But, before actually using the coding-system, the
+ Emacs represents a coding system by a Lisp symbol that has a property
+ `coding-system'. But, before actually using the coding system, the
information about it is set in a structure of type `struct
coding_system' for rapid processing. See section 6 for more details.
How end-of-line of a text is encoded depends on a system. For
instance, Unix's format is just one byte of `line-feed' code,
whereas DOS's format is two-byte sequence of `carriage-return' and
- `line-feed' codes. MacOS's format is one byte of `carriage-return'.
+ `line-feed' codes. MacOS's format is usually one byte of
+ `carriage-return'.
Since text characters encoding and end-of-line encoding are
independent, any coding system described above can take
/*** GENERAL NOTES on `decode_coding_XXX ()' functions ***
- These functions decode SRC_BYTES length text at SOURCE encoded in
- CODING to Emacs' internal format (emacs-mule). The resulting text
- goes to a place pointed to by DESTINATION, the length of which should
- not exceed DST_BYTES. The number of bytes actually processed is
- returned as *CONSUMED. The return value is the length of the decoded
- text. Below is a template of these functions. */
+ These functions decode SRC_BYTES length of unibyte text at SOURCE
+ encoded in CODING to Emacs' internal format. The resulting
+ multibyte text goes to a place pointed to by DESTINATION, the length
+ of which should not exceed DST_BYTES.
+
+ These functions set the information of original and decoded texts in
+ the members produced, produced_char, consumed, and consumed_char of
+ the structure *CODING. They also set the member result to one of
+ CODING_FINISH_XXX indicating how the decoding finished.
+
+ DST_BYTES zero means that source area and destination area are
+ overlapped, which means that we can produce a decoded text until it
+ reaches at the head of not-yet-decoded source text.
+
+ Below is a template of these functions. */
#if 0
-decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes, consumed)
+static void
+decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
...
}
/*** GENERAL NOTES on `encode_coding_XXX ()' functions ***
These functions encode SRC_BYTES length text at SOURCE of Emacs'
- internal format (emacs-mule) to CODING. The resulting text goes to
- a place pointed to by DESTINATION, the length of which should not
- exceed DST_BYTES. The number of bytes actually processed is
- returned as *CONSUMED. The return value is the length of the
- encoded text. Below is a template of these functions. */
+ internal multibyte format to CODING. The resulting unibyte text
+ goes to a place pointed to by DESTINATION, the length of which
+ should not exceed DST_BYTES.
+
+ These functions set the information of original and encoded texts in
+ the members produced, produced_char, consumed, and consumed_char of
+ the structure *CODING. They also set the member result to one of
+ CODING_FINISH_XXX indicating how the encoding finished.
+
+ DST_BYTES zero means that source area and destination area are
+ overlapped, which means that we can produce a encoded text until it
+ reaches at the head of not-yet-encoded source text.
+
+ Below is a template of these functions. */
#if 0
-encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes, consumed)
+static void
+encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
...
}
/*** COMMONLY USED MACROS ***/
-/* The following three macros ONE_MORE_BYTE, TWO_MORE_BYTES, and
- THREE_MORE_BYTES safely get one, two, and three bytes from the
- source text respectively. If there are not enough bytes in the
- source, they jump to `label_end_of_loop'. The caller should set
- variables `src' and `src_end' to appropriate areas in advance. */
-
-#define ONE_MORE_BYTE(c1) \
- do { \
- if (src < src_end) \
- c1 = *src++; \
- else \
- goto label_end_of_loop; \
- } while (0)
+/* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely
+ get one, two, and three bytes from the source text respectively.
+ If there are not enough bytes in the source, they jump to
+ `label_end_of_loop'. The caller should set variables `coding',
+ `src' and `src_end' to appropriate pointer in advance. These
+ macros are called from decoding routines `decode_coding_XXX', thus
+ it is assumed that the source text is unibyte. */
-#define TWO_MORE_BYTES(c1, c2) \
- do { \
- if (src + 1 < src_end) \
- c1 = *src++, c2 = *src++; \
- else \
- goto label_end_of_loop; \
+#define ONE_MORE_BYTE(c1) \
+ do { \
+ if (src >= src_end) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_SRC; \
+ goto label_end_of_loop; \
+ } \
+ c1 = *src++; \
} while (0)
-#define THREE_MORE_BYTES(c1, c2, c3) \
- do { \
- if (src + 2 < src_end) \
- c1 = *src++, c2 = *src++, c3 = *src++; \
- else \
- goto label_end_of_loop; \
+#define TWO_MORE_BYTES(c1, c2) \
+ do { \
+ if (src + 1 >= src_end) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_SRC; \
+ goto label_end_of_loop; \
+ } \
+ c1 = *src++; \
+ c2 = *src++; \
} while (0)
-/* The following three macros DECODE_CHARACTER_ASCII,
- DECODE_CHARACTER_DIMENSION1, and DECODE_CHARACTER_DIMENSION2 put
- the multi-byte form of a character of each class at the place
- pointed by `dst'. The caller should set the variable `dst' to
- point to an appropriate area and the variable `coding' to point to
- the coding-system of the currently decoding text in advance. */
-/* Decode one ASCII character C. */
+/* Set C to the next character at the source text pointed by `src'.
+ If there are not enough characters in the source, jump to
+ `label_end_of_loop'. The caller should set variables `coding'
+ `src', `src_end', and `translation_table' to appropriate pointers
+ in advance. This macro is used in encoding routines
+ `encode_coding_XXX', thus it assumes that the source text is in
+ multibyte form except for 8-bit characters. 8-bit characters are
+ in multibyte form if coding->src_multibyte is nonzero, else they
+ are represented by a single byte. */
-#define DECODE_CHARACTER_ASCII(c) \
+#define ONE_MORE_CHAR(c) \
do { \
- if (COMPOSING_P (coding->composing)) \
- *dst++ = 0xA0, *dst++ = (c) | 0x80; \
+ int len = src_end - src; \
+ int bytes; \
+ if (len <= 0) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_SRC; \
+ goto label_end_of_loop; \
+ } \
+ if (coding->src_multibyte \
+ || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \
+ c = STRING_CHAR_AND_LENGTH (src, len, bytes); \
else \
- *dst++ = (c); \
+ c = *src, bytes = 1; \
+ if (!NILP (translation_table)) \
+ c = translate_char (translation_table, c, 0, 0, 0); \
+ src += bytes; \
} while (0)
-/* Decode one DIMENSION1 character whose charset is CHARSET and whose
- position-code is C. */
-#define DECODE_CHARACTER_DIMENSION1(charset, c) \
+/* Produce a multibyte form of characater C to `dst'. Jump to
+ `label_end_of_loop' if there's not enough space at `dst'.
+
+ If we are now in the middle of composition sequence, the decoded
+ character may be ALTCHAR (for the current composition). In that
+ case, the character goes to coding->cmp_data->data instead of
+ `dst'.
+
+ This macro is used in decoding routines. */
+
+#define EMIT_CHAR(c) \
do { \
- unsigned char leading_code = CHARSET_LEADING_CODE_BASE (charset); \
- if (COMPOSING_P (coding->composing)) \
- *dst++ = leading_code + 0x20; \
- else \
- *dst++ = leading_code; \
- if (leading_code = CHARSET_LEADING_CODE_EXT (charset)) \
- *dst++ = leading_code; \
- *dst++ = (c) | 0x80; \
+ if (! COMPOSING_P (coding) \
+ || coding->composing == COMPOSITION_RELATIVE \
+ || coding->composing == COMPOSITION_WITH_RULE) \
+ { \
+ int bytes = CHAR_BYTES (c); \
+ if ((dst + bytes) > (dst_bytes ? dst_end : src)) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_DST; \
+ goto label_end_of_loop; \
+ } \
+ dst += CHAR_STRING (c, dst); \
+ coding->produced_char++; \
+ } \
+ \
+ if (COMPOSING_P (coding) \
+ && coding->composing != COMPOSITION_RELATIVE) \
+ { \
+ CODING_ADD_COMPOSITION_COMPONENT (coding, c); \
+ coding->composition_rule_follows \
+ = coding->composing != COMPOSITION_WITH_ALTCHARS; \
+ } \
} while (0)
-/* Decode one DIMENSION2 character whose charset is CHARSET and whose
- position-codes are C1 and C2. */
-#define DECODE_CHARACTER_DIMENSION2(charset, c1, c2) \
- do { \
- DECODE_CHARACTER_DIMENSION1 (charset, c1); \
- *dst++ = (c2) | 0x80; \
+#define EMIT_ONE_BYTE(c) \
+ do { \
+ if (dst >= (dst_bytes ? dst_end : src)) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_DST; \
+ goto label_end_of_loop; \
+ } \
+ *dst++ = c; \
+ } while (0)
+
+#define EMIT_TWO_BYTES(c1, c2) \
+ do { \
+ if (dst + 2 > (dst_bytes ? dst_end : src)) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_DST; \
+ goto label_end_of_loop; \
+ } \
+ *dst++ = c1, *dst++ = c2; \
+ } while (0)
+
+#define EMIT_BYTES(from, to) \
+ do { \
+ if (dst + (to - from) > (dst_bytes ? dst_end : src)) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_DST; \
+ goto label_end_of_loop; \
+ } \
+ while (from < to) \
+ *dst++ = *from++; \
} while (0)
\f
/*** 1. Preamble ***/
+#ifdef emacs
+#include <config.h>
+#endif
+
#include <stdio.h>
#ifdef emacs
-#include <config.h>
#include "lisp.h"
#include "buffer.h"
#include "charset.h"
+#include "composite.h"
#include "ccl.h"
#include "coding.h"
#include "window.h"
Lisp_Object Qno_conversion, Qundecided;
Lisp_Object Qcoding_system_history;
Lisp_Object Qsafe_charsets;
+Lisp_Object Qvalid_codes;
extern Lisp_Object Qinsert_file_contents, Qwrite_region;
Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument;
Lisp_Object Qstart_process, Qopen_network_stream;
Lisp_Object Qtarget_idx;
-/* Mnemonic character of each format of end-of-line. */
-int eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac;
-/* Mnemonic character to indicate format of end-of-line is not yet
+Lisp_Object Vselect_safe_coding_system_function;
+
+/* Mnemonic string for each format of end-of-line. */
+Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac;
+/* Mnemonic string to indicate format of end-of-line is not yet
decided. */
-int eol_mnemonic_undecided;
+Lisp_Object eol_mnemonic_undecided;
/* Format of end-of-line decided by system. This is CODING_EOL_LF on
Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */
Lisp_Object Qcoding_system_p, Qcoding_system_error;
-/* Coding system emacs-mule is for converting only end-of-line format. */
-Lisp_Object Qemacs_mule;
+/* Coding system emacs-mule and raw-text are for converting only
+ end-of-line format. */
+Lisp_Object Qemacs_mule, Qraw_text;
/* Coding-systems are handed between Emacs Lisp programs and C internal
routines by the following three variables. */
Lisp_Object Vlast_coding_system_used;
/* A vector of length 256 which contains information about special
- Latin codes (espepcially for dealing with Microsoft code). */
+ Latin codes (especially for dealing with Microsoft codes). */
Lisp_Object Vlatin_extra_code_table;
/* Flag to inhibit code conversion of end-of-line format. */
int inhibit_eol_conversion;
+/* Flag to make buffer-file-coding-system inherit from process-coding. */
+int inherit_process_coding_system;
+
/* Coding system to be used to encode text for terminal display. */
struct coding_system terminal_coding;
/* Coding system of what is sent from terminal keyboard. */
struct coding_system keyboard_coding;
+/* Default coding system to be used to write a file. */
+struct coding_system default_buffer_file_coding;
+
Lisp_Object Vfile_coding_system_alist;
Lisp_Object Vprocess_coding_system_alist;
Lisp_Object Vnetwork_coding_system_alist;
+Lisp_Object Vlocale_coding_system;
+
#endif /* emacs */
-Lisp_Object Qcoding_category_index;
+Lisp_Object Qcoding_category, Qcoding_category_index;
/* List of symbols `coding-category-xxx' ordered by priority. */
Lisp_Object Vcoding_category_list;
-/* Table of coding-systems currently assigned to each coding-category. */
-Lisp_Object coding_category_table[CODING_CATEGORY_IDX_MAX];
+/* Table of coding categories (Lisp symbols). */
+Lisp_Object Vcoding_category_table;
/* Table of names of symbol for each coding-category. */
char *coding_category_name[CODING_CATEGORY_IDX_MAX] = {
"coding-category-emacs-mule",
"coding-category-sjis",
"coding-category-iso-7",
+ "coding-category-iso-7-tight",
"coding-category-iso-8-1",
"coding-category-iso-8-2",
"coding-category-iso-7-else",
"coding-category-iso-8-else",
+ "coding-category-ccl",
"coding-category-big5",
+ "coding-category-utf-8",
+ "coding-category-utf-16-be",
+ "coding-category-utf-16-le",
"coding-category-raw-text",
"coding-category-binary"
};
-/* Flag to tell if we look up unification table on character code
+/* Table of pointers to coding systems corresponding to each coding
+ categories. */
+struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX];
+
+/* Table of coding category masks. Nth element is a mask for a coding
+ cateogry of which priority is Nth. */
+static
+int coding_priorities[CODING_CATEGORY_IDX_MAX];
+
+/* Flag to tell if we look up translation table on character code
conversion. */
-Lisp_Object Venable_character_unification;
-/* Standard unification table to look up on decoding (reading). */
-Lisp_Object Vstandard_character_unification_table_for_decode;
-/* Standard unification table to look up on encoding (writing). */
-Lisp_Object Vstandard_character_unification_table_for_encode;
+Lisp_Object Venable_character_translation;
+/* Standard translation table to look up on decoding (reading). */
+Lisp_Object Vstandard_translation_table_for_decode;
+/* Standard translation table to look up on encoding (writing). */
+Lisp_Object Vstandard_translation_table_for_encode;
-Lisp_Object Qcharacter_unification_table;
-Lisp_Object Qcharacter_unification_table_for_decode;
-Lisp_Object Qcharacter_unification_table_for_encode;
+Lisp_Object Qtranslation_table;
+Lisp_Object Qtranslation_table_id;
+Lisp_Object Qtranslation_table_for_decode;
+Lisp_Object Qtranslation_table_for_encode;
/* Alist of charsets vs revision number. */
Lisp_Object Vcharset_revision_alist;
/* Default coding systems used for process I/O. */
Lisp_Object Vdefault_process_coding_system;
+/* Global flag to tell that we can't call post-read-conversion and
+ pre-write-conversion functions. Usually the value is zero, but it
+ is set to 1 temporarily while such functions are running. This is
+ to avoid infinite recursive call. */
+static int inhibit_pre_post_conversion;
+
\f
/*** 2. Emacs internal format (emacs-mule) handlers ***/
/* Emacs' internal format for encoding multiple character sets is a
kind of multi-byte encoding, i.e. characters are encoded by
- variable-length sequences of one-byte codes. ASCII characters
- and control characters (e.g. `tab', `newline') are represented by
- one-byte sequences which are their ASCII codes, in the range 0x00
- through 0x7F. The other characters are represented by a sequence
- of `base leading-code', optional `extended leading-code', and one
- or two `position-code's. The length of the sequence is determined
- by the base leading-code. Leading-code takes the range 0x80
- through 0x9F, whereas extended leading-code and position-code take
- the range 0xA0 through 0xFF. See `charset.h' for more details
- about leading-code and position-code.
-
- There's one exception to this rule. Special leading-code
- `leading-code-composition' denotes that the following several
- characters should be composed into one character. Leading-codes of
- components (except for ASCII) are added 0x20. An ASCII character
- component is represented by a 2-byte sequence of `0xA0' and
- `ASCII-code + 0x80'. See also the comments in `charset.h' for the
- details of composite character. Hence, we can summarize the code
- range as follows:
+ variable-length sequences of one-byte codes.
+
+ ASCII characters and control characters (e.g. `tab', `newline') are
+ represented by one-byte sequences which are their ASCII codes, in
+ the range 0x00 through 0x7F.
+
+ 8-bit characters of the range 0x80..0x9F are represented by
+ two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit
+ code + 0x20).
+
+ 8-bit characters of the range 0xA0..0xFF are represented by
+ one-byte sequences which are their 8-bit code.
+
+ The other characters are represented by a sequence of `base
+ leading-code', optional `extended leading-code', and one or two
+ `position-code's. The length of the sequence is determined by the
+ base leading-code. Leading-code takes the range 0x80 through 0x9F,
+ whereas extended leading-code and position-code take the range 0xA0
+ through 0xFF. See `charset.h' for more details about leading-code
+ and position-code.
--- CODE RANGE of Emacs' internal format ---
- (character set) (range)
- ASCII 0x00 .. 0x7F
- ELSE (1st byte) 0x80 .. 0x9F
- (rest bytes) 0xA0 .. 0xFF
+ character set range
+ ------------- -----
+ ascii 0x00..0x7F
+ eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF
+ eight-bit-graphic 0xA0..0xBF
+ ELSE 0x81..0x9F + [0xA0..0xFF]+
---------------------------------------------
*/
enum emacs_code_class_type emacs_code_class[256];
-/* Go to the next statement only if *SRC is accessible and the code is
- greater than 0xA0. */
-#define CHECK_CODE_RANGE_A0_FF \
- do { \
- if (src >= src_end) \
- goto label_end_of_switch; \
- else if (*src++ < 0xA0) \
- return 0; \
- } while (0)
-
/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
Check if a text is encoded in Emacs' internal format. If it is,
- return CODING_CATEGORY_MASK_EMASC_MULE, else return 0. */
+ return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */
int
detect_coding_emacs_mule (src, src_end)
- unsigned char *src, *src_end;
+ unsigned char *src, *src_end;
{
unsigned char c;
int composing = 0;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
- while (src < src_end)
+ while (1)
{
- c = *src++;
+ ONE_MORE_BYTE (c);
if (composing)
{
if (c < 0xA0)
composing = 0;
+ else if (c == 0xA0)
+ {
+ ONE_MORE_BYTE (c);
+ c &= 0x7F;
+ }
else
c -= 0x20;
}
- switch (emacs_code_class[c])
+ if (c < 0x20)
{
- case EMACS_ascii_code:
- case EMACS_linefeed_code:
- break;
-
- case EMACS_control_code:
if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
return 0;
- break;
-
- case EMACS_invalid_code:
- return 0;
-
- case EMACS_leading_code_composition: /* c == 0x80 */
- if (composing)
- CHECK_CODE_RANGE_A0_FF;
- else
+ }
+ else if (c >= 0x80 && c < 0xA0)
+ {
+ if (c == 0x80)
+ /* Old leading code for a composite character. */
composing = 1;
- break;
+ else
+ {
+ unsigned char *src_base = src - 1;
+ int bytes;
- case EMACS_leading_code_4:
- CHECK_CODE_RANGE_A0_FF;
- /* fall down to check it two more times ... */
+ if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base,
+ bytes))
+ return 0;
+ src = src_base + bytes;
+ }
+ }
+ }
+ label_end_of_loop:
+ return CODING_CATEGORY_MASK_EMACS_MULE;
+}
- case EMACS_leading_code_3:
- CHECK_CODE_RANGE_A0_FF;
- /* fall down to check it one more time ... */
- case EMACS_leading_code_2:
- CHECK_CODE_RANGE_A0_FF;
- break;
+/* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
- default:
- label_end_of_switch:
+static void
+decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes)
+ struct coding_system *coding;
+ unsigned char *source, *destination;
+ int src_bytes, dst_bytes;
+{
+ unsigned char *src = source;
+ unsigned char *src_end = source + src_bytes;
+ unsigned char *dst = destination;
+ unsigned char *dst_end = destination + dst_bytes;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source code, or
+ when there's not enough destination area to produce a
+ character. */
+ unsigned char *src_base;
+
+ coding->produced_char = 0;
+ while ((src_base = src) < src_end)
+ {
+ unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p;
+ int bytes;
+
+ if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes))
+ {
+ p = src;
+ src += bytes;
+ }
+ else
+ {
+ bytes = CHAR_STRING (*src, tmp);
+ p = tmp;
+ src++;
+ }
+ if (dst + bytes >= (dst_bytes ? dst_end : src))
+ {
+ coding->result = CODING_FINISH_INSUFFICIENT_DST;
break;
}
+ while (bytes--) *dst++ = *p++;
+ coding->produced_char++;
}
- return CODING_CATEGORY_MASK_EMACS_MULE;
+ coding->consumed = coding->consumed_char = src_base - source;
+ coding->produced = dst - destination;
}
+#define encode_coding_emacs_mule(coding, source, destination, src_bytes, dst_bytes) \
+ encode_eol (coding, source, destination, src_bytes, dst_bytes)
+
+
\f
/*** 3. ISO2022 handlers ***/
/* The following note describes the coding system ISO2022 briefly.
- Since the intention of this note is to help in understanding of
- the programs in this file, some parts are NOT ACCURATE or OVERLY
- SIMPLIFIED. For the thorough understanding, please refer to the
+ Since the intention of this note is to help understand the
+ functions in this file, some parts are NOT ACCURATE or OVERLY
+ SIMPLIFIED. For thorough understanding, please refer to the
original document of ISO2022.
ISO2022 provides many mechanisms to encode several character sets
- in 7-bit and 8-bit environment. If one chooses 7-bite environment,
- all text is encoded by codes of less than 128. This may make the
- encoded text a little bit longer, but the text gets more stability
- to pass through several gateways (some of them strip off the MSB).
+ in 7-bit and 8-bit environments. For 7-bite environments, all text
+ is encoded using bytes less than 128. This may make the encoded
+ text a little bit longer, but the text passes more easily through
+ several gateways, some of which strip off MSB (Most Signigant Bit).
- There are two kinds of character set: control character set and
+ There are two kinds of character sets: control character set and
graphic character set. The former contains control characters such
as `newline' and `escape' to provide control functions (control
- functions are provided also by escape sequences). The latter
- contains graphic characters such as ' A' and '-'. Emacs recognizes
+ functions are also provided by escape sequences). The latter
+ contains graphic characters such as 'A' and '-'. Emacs recognizes
two control character sets and many graphic character sets.
Graphic character sets are classified into one of the following
- four classes, DIMENSION1_CHARS94, DIMENSION1_CHARS96,
- DIMENSION2_CHARS94, DIMENSION2_CHARS96 according to the number of
- bytes (DIMENSION) and the number of characters in one dimension
- (CHARS) of the set. In addition, each character set is assigned an
- identification tag (called "final character" and denoted as <F>
- here after) which is unique in each class. <F> of each character
- set is decided by ECMA(*) when it is registered in ISO. Code range
- of <F> is 0x30..0x7F (0x30..0x3F are for private use only).
+ four classes, according to the number of bytes (DIMENSION) and
+ number of characters in one dimension (CHARS) of the set:
+ - DIMENSION1_CHARS94
+ - DIMENSION1_CHARS96
+ - DIMENSION2_CHARS94
+ - DIMENSION2_CHARS96
+
+ In addition, each character set is assigned an identification tag,
+ unique for each set, called "final character" (denoted as <F>
+ hereafter). The <F> of each character set is decided by ECMA(*)
+ when it is registered in ISO. The code range of <F> is 0x30..0x7F
+ (0x30..0x3F are for private use only).
Note (*): ECMA = European Computer Manufacturers Association
o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
o DIMENSION2_CHARS96 -- none for the moment
- A code area (1byte=8bits) is divided into 4 areas, C0, GL, C1, and GR.
+ A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR.
C0 [0x00..0x1F] -- control character plane 0
GL [0x20..0x7F] -- graphic character plane 0
C1 [0x80..0x9F] -- control character plane 1
GR [0xA0..0xFF] -- graphic character plane 1
A control character set is directly designated and invoked to C0 or
- C1 by an escape sequence. The most common case is that ISO646's
- control character set is designated/invoked to C0 and ISO6429's
- control character set is designated/invoked to C1, and usually
- these designations/invocations are omitted in a coded text. With
- 7-bit environment, only C0 can be used, and a control character for
- C1 is encoded by an appropriate escape sequence to fit in the
- environment. All control characters for C1 are defined the
- corresponding escape sequences.
+ C1 by an escape sequence. The most common case is that:
+ - ISO646's control character set is designated/invoked to C0, and
+ - ISO6429's control character set is designated/invoked to C1,
+ and usually these designations/invocations are omitted in encoded
+ text. In a 7-bit environment, only C0 can be used, and a control
+ character for C1 is encoded by an appropriate escape sequence to
+ fit into the environment. All control characters for C1 are
+ defined to have corresponding escape sequences.
A graphic character set is at first designated to one of four
graphic registers (G0 through G3), then these graphic registers are
invoked to GL or GR. These designations and invocations can be
done independently. The most common case is that G0 is invoked to
- GL, G1 is invoked to GR, and ASCII is designated to G0, and usually
- these invocations and designations are omitted in a coded text.
- With 7-bit environment, only GL can be used.
+ GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
+ these invocations and designations are omitted in encoded text.
+ In a 7-bit environment, only GL can be used.
- When a graphic character set of CHARS94 is invoked to GL, code 0x20
- and 0x7F of GL area work as control characters SPACE and DEL
- respectively, and code 0xA0 and 0xFF of GR area should not be used.
+ When a graphic character set of CHARS94 is invoked to GL, codes
+ 0x20 and 0x7F of the GL area work as control characters SPACE and
+ DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
+ be used.
There are two ways of invocation: locking-shift and single-shift.
With locking-shift, the invocation lasts until the next different
- invocation, whereas with single-shift, the invocation works only
- for the following character and doesn't affect locking-shift.
- Invocations are done by the following control characters or escape
- sequences.
+ invocation, whereas with single-shift, the invocation affects the
+ following character only and doesn't affect the locking-shift
+ state. Invocations are done by the following control characters or
+ escape sequences:
----------------------------------------------------------------------
- function control char escape sequence description
+ abbrev function cntrl escape seq description
----------------------------------------------------------------------
- SI (shift-in) 0x0F none invoke G0 to GL
- SO (shift-out) 0x0E none invoke G1 to GL
- LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
- LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
- SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 into GL
- SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 into GL
+ SI/LS0 (shift-in) 0x0F none invoke G0 into GL
+ SO/LS1 (shift-out) 0x0E none invoke G1 into GL
+ LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
+ LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
+ LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
+ LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
+ LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
+ SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
+ SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
----------------------------------------------------------------------
- The first four are for locking-shift. Control characters for these
- functions are defined by macros ISO_CODE_XXX in `coding.h'.
+ (*) These are not used by any known coding system.
+
+ Control characters for these functions are defined by macros
+ ISO_CODE_XXX in `coding.h'.
- Designations are done by the following escape sequences.
+ Designations are done by the following escape sequences:
----------------------------------------------------------------------
escape sequence description
----------------------------------------------------------------------
----------------------------------------------------------------------
In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
- of dimension 1, chars 94, and final character <F>, and etc.
+ of dimension 1, chars 94, and final character <F>, etc...
Note (*): Although these designations are not allowed in ISO2022,
Emacs accepts them on decoding, and produces them on encoding
- CHARS96 character set in a coding system which is characterized as
+ CHARS96 character sets in a coding system which is characterized as
7-bit environment, non-locking-shift, and non-single-shift.
Note (**): If <F> is '@', 'A', or 'B', the intermediate character
- '(' can be omitted. We call this as "short-form" here after.
+ '(' can be omitted. We refer to this as "short-form" hereafter.
Now you may notice that there are a lot of ways for encoding the
- same multilingual text in ISO2022. Actually, there exists many
- coding systems such as Compound Text (used in X's inter client
- communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR
- (used in Korean Internet), EUC (Extended UNIX Code, used in Asian
+ same multilingual text in ISO2022. Actually, there exist many
+ coding systems such as Compound Text (used in X11's inter client
+ communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
+ (used in Korean internet), EUC (Extended UNIX Code, used in Asian
localized platforms), and all of these are variants of ISO2022.
In addition to the above, Emacs handles two more kinds of escape
sequences: ISO6429's direction specification and Emacs' private
sequence for specifying character composition.
- ISO6429's direction specification takes the following format:
+ ISO6429's direction specification takes the following form:
o CSI ']' -- end of the current direction
o CSI '0' ']' -- end of the current direction
o CSI '1' ']' -- start of left-to-right text
o CSI '2' ']' -- start of right-to-left text
The control character CSI (0x9B: control sequence introducer) is
- abbreviated to the escape sequence ESC '[' in 7-bit environment.
-
- Character composition specification takes the following format:
- o ESC '0' -- start character composition
- o ESC '1' -- end character composition
- Since these are not standard escape sequences of any ISO, the use
- of them for these meaning is restricted to Emacs only. */
+ abbreviated to the escape sequence ESC '[' in a 7-bit environment.
+
+ Character composition specification takes the following form:
+ o ESC '0' -- start relative composition
+ o ESC '1' -- end composition
+ o ESC '2' -- start rule-base composition (*)
+ o ESC '3' -- start relative composition with alternate chars (**)
+ o ESC '4' -- start rule-base composition with alternate chars (**)
+ Since these are not standard escape sequences of any ISO standard,
+ the use of them for these meaning is restricted to Emacs only.
+
+ (*) This form is used only in Emacs 20.5 and the older versions,
+ but the newer versions can safely decode it.
+ (**) This form is used only in Emacs 21.1 and the newer versions,
+ and the older versions can't decode it.
+
+ Here's a list of examples usages of these composition escape
+ sequences (categorized by `enum composition_method').
+
+ COMPOSITION_RELATIVE:
+ ESC 0 CHAR [ CHAR ] ESC 1
+ COMPOSITOIN_WITH_RULE:
+ ESC 2 CHAR [ RULE CHAR ] ESC 1
+ COMPOSITION_WITH_ALTCHARS:
+ ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1
+ COMPOSITION_WITH_RULE_ALTCHARS:
+ ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */
enum iso_code_class_type iso_code_class[256];
+#define CHARSET_OK(idx, charset) \
+ (coding_system_table[idx] \
+ && (coding_system_table[idx]->safe_charsets[charset] \
+ || (CODING_SPEC_ISO_REQUESTED_DESIGNATION \
+ (coding_system_table[idx], charset) \
+ != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)))
+
+#define SHIFT_OUT_OK(idx) \
+ (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0)
+
/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
Check if a text is encoded in ISO2022. If it is, returns an
integer in which appropriate flag bits any of:
CODING_CATEGORY_MASK_ISO_7
+ CODING_CATEGORY_MASK_ISO_7_TIGHT
CODING_CATEGORY_MASK_ISO_8_1
CODING_CATEGORY_MASK_ISO_8_2
CODING_CATEGORY_MASK_ISO_7_ELSE
detect_coding_iso2022 (src, src_end)
unsigned char *src, *src_end;
{
- int mask = (CODING_CATEGORY_MASK_ISO_7
- | CODING_CATEGORY_MASK_ISO_8_1
- | CODING_CATEGORY_MASK_ISO_8_2
- | CODING_CATEGORY_MASK_ISO_7_ELSE
- | CODING_CATEGORY_MASK_ISO_8_ELSE
- );
- int g1 = 0; /* 1 iff designating to G1. */
- int c, i;
- struct coding_system coding_iso_8_1, coding_iso_8_2;
-
- /* Coding systems of these categories may accept latin extra codes. */
- setup_coding_system
- (XSYMBOL (coding_category_table[CODING_CATEGORY_IDX_ISO_8_1])->value,
- &coding_iso_8_1);
- setup_coding_system
- (XSYMBOL (coding_category_table[CODING_CATEGORY_IDX_ISO_8_2])->value,
- &coding_iso_8_2);
-
+ int mask = CODING_CATEGORY_MASK_ISO;
+ int mask_found = 0;
+ int reg[4], shift_out = 0, single_shifting = 0;
+ int c, c1, i, charset;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
+
+ reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1;
while (mask && src < src_end)
{
- c = *src++;
+ ONE_MORE_BYTE (c);
switch (c)
{
case ISO_CODE_ESC:
- if (src >= src_end)
- break;
- c = *src++;
- if ((c >= '(' && c <= '/'))
+ single_shifting = 0;
+ ONE_MORE_BYTE (c);
+ if (c >= '(' && c <= '/')
{
/* Designation sequence for a charset of dimension 1. */
- if (src >= src_end)
+ ONE_MORE_BYTE (c1);
+ if (c1 < ' ' || c1 >= 0x80
+ || (charset = iso_charset_table[0][c >= ','][c1]) < 0)
+ /* Invalid designation sequence. Just ignore. */
break;
- c = *src++;
- if (c < ' ' || c >= 0x80)
- /* Invalid designation sequence. */
- return 0;
+ reg[(c - '(') % 4] = charset;
}
else if (c == '$')
{
/* Designation sequence for a charset of dimension 2. */
- if (src >= src_end)
- break;
- c = *src++;
+ ONE_MORE_BYTE (c);
if (c >= '@' && c <= 'B')
/* Designation for JISX0208.1978, GB2312, or JISX0208. */
- ;
+ reg[0] = charset = iso_charset_table[1][0][c];
else if (c >= '(' && c <= '/')
{
- if (src >= src_end)
+ ONE_MORE_BYTE (c1);
+ if (c1 < ' ' || c1 >= 0x80
+ || (charset = iso_charset_table[1][c >= ','][c1]) < 0)
+ /* Invalid designation sequence. Just ignore. */
break;
- c = *src++;
- if (c < ' ' || c >= 0x80)
- /* Invalid designation sequence. */
- return 0;
+ reg[(c - '(') % 4] = charset;
}
else
- /* Invalid designation sequence. */
- return 0;
+ /* Invalid designation sequence. Just ignore. */
+ break;
+ }
+ else if (c == 'N' || c == 'O')
+ {
+ /* ESC <Fe> for SS2 or SS3. */
+ mask &= CODING_CATEGORY_MASK_ISO_7_ELSE;
+ break;
+ }
+ else if (c >= '0' && c <= '4')
+ {
+ /* ESC <Fp> for start/end composition. */
+ mask_found |= CODING_CATEGORY_MASK_ISO;
+ break;
}
- else if (c == 'N' || c == 'O' || c == 'n' || c == 'o')
- /* Locking shift. */
- mask &= (CODING_CATEGORY_MASK_ISO_7_ELSE
- | CODING_CATEGORY_MASK_ISO_8_ELSE);
- else if (c == '0' || c == '1' || c == '2')
- /* Start/end composition. */
- ;
else
- /* Invalid escape sequence. */
- return 0;
+ /* Invalid escape sequence. Just ignore. */
+ break;
+
+ /* We found a valid designation sequence for CHARSET. */
+ mask &= ~CODING_CATEGORY_MASK_ISO_8BIT;
+ if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset))
+ mask_found |= CODING_CATEGORY_MASK_ISO_7;
+ else
+ mask &= ~CODING_CATEGORY_MASK_ISO_7;
+ if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset))
+ mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT;
+ else
+ mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT;
+ if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset))
+ mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE;
+ else
+ mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE;
+ if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset))
+ mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE;
+ else
+ mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE;
break;
case ISO_CODE_SO:
- mask &= (CODING_CATEGORY_MASK_ISO_7_ELSE
- | CODING_CATEGORY_MASK_ISO_8_ELSE);
+ single_shifting = 0;
+ if (shift_out == 0
+ && (reg[1] >= 0
+ || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE)
+ || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE)))
+ {
+ /* Locking shift out. */
+ mask &= ~CODING_CATEGORY_MASK_ISO_7BIT;
+ mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT;
+ }
break;
+ case ISO_CODE_SI:
+ single_shifting = 0;
+ if (shift_out == 1)
+ {
+ /* Locking shift in. */
+ mask &= ~CODING_CATEGORY_MASK_ISO_7BIT;
+ mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT;
+ }
+ break;
+
case ISO_CODE_CSI:
+ single_shifting = 0;
case ISO_CODE_SS2:
case ISO_CODE_SS3:
{
if (c != ISO_CODE_CSI)
{
- if (coding_iso_8_1.flags & CODING_FLAG_ISO_SINGLE_SHIFT)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags
+ & CODING_FLAG_ISO_SINGLE_SHIFT)
newmask |= CODING_CATEGORY_MASK_ISO_8_1;
- if (coding_iso_8_2.flags & CODING_FLAG_ISO_SINGLE_SHIFT)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags
+ & CODING_FLAG_ISO_SINGLE_SHIFT)
newmask |= CODING_CATEGORY_MASK_ISO_8_2;
+ single_shifting = 1;
}
if (VECTORP (Vlatin_extra_code_table)
&& !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c]))
{
- if (coding_iso_8_1.flags & CODING_FLAG_ISO_LATIN_EXTRA)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags
+ & CODING_FLAG_ISO_LATIN_EXTRA)
newmask |= CODING_CATEGORY_MASK_ISO_8_1;
- if (coding_iso_8_2.flags & CODING_FLAG_ISO_LATIN_EXTRA)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags
+ & CODING_FLAG_ISO_LATIN_EXTRA)
newmask |= CODING_CATEGORY_MASK_ISO_8_2;
}
mask &= newmask;
+ mask_found |= newmask;
}
break;
default:
if (c < 0x80)
- break;
+ {
+ single_shifting = 0;
+ break;
+ }
else if (c < 0xA0)
{
+ single_shifting = 0;
if (VECTORP (Vlatin_extra_code_table)
&& !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c]))
{
int newmask = 0;
- if (coding_iso_8_1.flags & CODING_FLAG_ISO_LATIN_EXTRA)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags
+ & CODING_FLAG_ISO_LATIN_EXTRA)
newmask |= CODING_CATEGORY_MASK_ISO_8_1;
- if (coding_iso_8_2.flags & CODING_FLAG_ISO_LATIN_EXTRA)
+ if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags
+ & CODING_FLAG_ISO_LATIN_EXTRA)
newmask |= CODING_CATEGORY_MASK_ISO_8_2;
mask &= newmask;
+ mask_found |= newmask;
}
else
return 0;
}
else
{
- unsigned char *src_begin = src;
-
- mask &= ~(CODING_CATEGORY_MASK_ISO_7
+ mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT
| CODING_CATEGORY_MASK_ISO_7_ELSE);
- while (src < src_end && *src >= 0xA0)
- src++;
- if ((src - src_begin - 1) & 1 && src < src_end)
- mask &= ~CODING_CATEGORY_MASK_ISO_8_2;
+ mask_found |= CODING_CATEGORY_MASK_ISO_8_1;
+ /* Check the length of succeeding codes of the range
+ 0xA0..0FF. If the byte length is odd, we exclude
+ CODING_CATEGORY_MASK_ISO_8_2. We can check this only
+ when we are not single shifting. */
+ if (!single_shifting
+ && mask & CODING_CATEGORY_MASK_ISO_8_2)
+ {
+ int i = 1;
+ while (src < src_end)
+ {
+ ONE_MORE_BYTE (c);
+ if (c < 0xA0)
+ break;
+ i++;
+ }
+
+ if (i & 1 && src < src_end)
+ mask &= ~CODING_CATEGORY_MASK_ISO_8_2;
+ else
+ mask_found |= CODING_CATEGORY_MASK_ISO_8_2;
+ }
}
break;
}
}
+ label_end_of_loop:
+ return (mask & mask_found);
+}
+
+/* Decode a character of which charset is CHARSET, the 1st position
+ code is C1, the 2nd position code is C2, and return the decoded
+ character code. If the variable `translation_table' is non-nil,
+ returned the translated code. */
- return mask;
+#define DECODE_ISO_CHARACTER(charset, c1, c2) \
+ (NILP (translation_table) \
+ ? MAKE_CHAR (charset, c1, c2) \
+ : translate_char (translation_table, -1, charset, c1, c2))
+
+/* Set designation state into CODING. */
+#define DECODE_DESIGNATION(reg, dimension, chars, final_char) \
+ do { \
+ int charset; \
+ \
+ if (final_char < '0' || final_char >= 128) \
+ goto label_invalid_code; \
+ charset = ISO_CHARSET_TABLE (make_number (dimension), \
+ make_number (chars), \
+ make_number (final_char)); \
+ if (charset >= 0 \
+ && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \
+ || coding->safe_charsets[charset])) \
+ { \
+ if (coding->spec.iso2022.last_invalid_designation_register == 0 \
+ && reg == 0 \
+ && charset == CHARSET_ASCII) \
+ { \
+ /* We should insert this designation sequence as is so \
+ that it is surely written back to a file. */ \
+ coding->spec.iso2022.last_invalid_designation_register = -1; \
+ goto label_invalid_code; \
+ } \
+ coding->spec.iso2022.last_invalid_designation_register = -1; \
+ if ((coding->mode & CODING_MODE_DIRECTION) \
+ && CHARSET_REVERSE_CHARSET (charset) >= 0) \
+ charset = CHARSET_REVERSE_CHARSET (charset); \
+ CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \
+ } \
+ else \
+ { \
+ coding->spec.iso2022.last_invalid_designation_register = reg; \
+ goto label_invalid_code; \
+ } \
+ } while (0)
+
+/* Allocate a memory block for storing information about compositions.
+ The block is chained to the already allocated blocks. */
+
+void
+coding_allocate_composition_data (coding, char_offset)
+ struct coding_system *coding;
+ int char_offset;
+{
+ struct composition_data *cmp_data
+ = (struct composition_data *) xmalloc (sizeof *cmp_data);
+
+ cmp_data->char_offset = char_offset;
+ cmp_data->used = 0;
+ cmp_data->prev = coding->cmp_data;
+ cmp_data->next = NULL;
+ if (coding->cmp_data)
+ coding->cmp_data->next = cmp_data;
+ coding->cmp_data = cmp_data;
+ coding->cmp_data_start = 0;
}
-/* Decode a character of which charset is CHARSET and the 1st position
- code is C1. If dimension of CHARSET is 2, the 2nd position code is
- fetched from SRC and set to C2. If CHARSET is negative, it means
- that we are decoding ill formed text, and what we can do is just to
- read C1 as is. */
+/* Record the starting position START and METHOD of one composition. */
-#define DECODE_ISO_CHARACTER(charset, c1) \
+#define CODING_ADD_COMPOSITION_START(coding, start, method) \
+ do { \
+ struct composition_data *cmp_data = coding->cmp_data; \
+ int *data = cmp_data->data + cmp_data->used; \
+ coding->cmp_data_start = cmp_data->used; \
+ data[0] = -1; \
+ data[1] = cmp_data->char_offset + start; \
+ data[3] = (int) method; \
+ cmp_data->used += 4; \
+ } while (0)
+
+/* Record the ending position END of the current composition. */
+
+#define CODING_ADD_COMPOSITION_END(coding, end) \
+ do { \
+ struct composition_data *cmp_data = coding->cmp_data; \
+ int *data = cmp_data->data + coding->cmp_data_start; \
+ data[0] = cmp_data->used - coding->cmp_data_start; \
+ data[2] = cmp_data->char_offset + end; \
+ } while (0)
+
+/* Record one COMPONENT (alternate character or composition rule). */
+
+#define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \
+ (coding->cmp_data->data[coding->cmp_data->used++] = component)
+
+/* Handle compositoin start sequence ESC 0, ESC 2, ESC 3, or ESC 4. */
+
+#define DECODE_COMPOSITION_START(c1) \
+ do { \
+ if (coding->composing == COMPOSITION_DISABLED) \
+ { \
+ *dst++ = ISO_CODE_ESC; \
+ *dst++ = c1 & 0x7f; \
+ coding->produced_char += 2; \
+ } \
+ else if (!COMPOSING_P (coding)) \
+ { \
+ /* This is surely the start of a composition. We must be sure \
+ that coding->cmp_data has enough space to store the \
+ information about the composition. If not, terminate the \
+ current decoding loop, allocate one more memory block for \
+ coding->cmp_data in the calller, then start the decoding \
+ loop again. We can't allocate memory here directly because \
+ it may cause buffer/string relocation. */ \
+ if (!coding->cmp_data \
+ || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \
+ >= COMPOSITION_DATA_SIZE)) \
+ { \
+ coding->result = CODING_FINISH_INSUFFICIENT_CMP; \
+ goto label_end_of_loop; \
+ } \
+ coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \
+ : c1 == '2' ? COMPOSITION_WITH_RULE \
+ : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \
+ : COMPOSITION_WITH_RULE_ALTCHARS); \
+ CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \
+ coding->composing); \
+ coding->composition_rule_follows = 0; \
+ } \
+ else \
+ { \
+ /* We are already handling a composition. If the method is \
+ the following two, the codes following the current escape \
+ sequence are actual characters stored in a buffer. */ \
+ if (coding->composing == COMPOSITION_WITH_ALTCHARS \
+ || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \
+ { \
+ coding->composing = COMPOSITION_RELATIVE; \
+ coding->composition_rule_follows = 0; \
+ } \
+ } \
+ } while (0)
+
+/* Handle compositoin end sequence ESC 1. */
+
+#define DECODE_COMPOSITION_END(c1) \
do { \
- int c_alt, charset_alt = (charset); \
- if (COMPOSING_HEAD_P (coding->composing)) \
+ if (coding->composing == COMPOSITION_DISABLED) \
{ \
- *dst++ = LEADING_CODE_COMPOSITION; \
- if (COMPOSING_WITH_RULE_P (coding->composing)) \
- /* To tell composition rules are embeded. */ \
- *dst++ = 0xFF; \
- coding->composing += 2; \
+ *dst++ = ISO_CODE_ESC; \
+ *dst++ = c1; \
+ coding->produced_char += 2; \
} \
- if ((charset) >= 0) \
+ else \
{ \
- if (CHARSET_DIMENSION (charset) == 2) \
- { \
- ONE_MORE_BYTE (c2); \
- if (iso_code_class[(c2) & 0x7F] != ISO_0x20_or_0x7F \
- && iso_code_class[(c2) & 0x7F] != ISO_graphic_plane_0) \
- { \
- src--; \
- c2 = ' '; \
- } \
- } \
- if (!NILP (unification_table) \
- && ((c_alt = unify_char (unification_table, \
- -1, (charset), c1, c2)) >= 0)) \
- SPLIT_CHAR (c_alt, charset_alt, c1, c2); \
+ CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \
+ coding->composing = COMPOSITION_NO; \
} \
- if (charset_alt == CHARSET_ASCII || charset_alt < 0) \
- DECODE_CHARACTER_ASCII (c1); \
- else if (CHARSET_DIMENSION (charset_alt) == 1) \
- DECODE_CHARACTER_DIMENSION1 (charset_alt, c1); \
- else \
- DECODE_CHARACTER_DIMENSION2 (charset_alt, c1, c2); \
- if (COMPOSING_WITH_RULE_P (coding->composing)) \
- /* To tell a composition rule follows. */ \
- coding->composing = COMPOSING_WITH_RULE_RULE; \
} while (0)
-/* Set designation state into CODING. */
-#define DECODE_DESIGNATION(reg, dimension, chars, final_char) \
- do { \
- int charset = ISO_CHARSET_TABLE (make_number (dimension), \
- make_number (chars), \
- make_number (final_char)); \
- if (charset >= 0) \
- { \
- if (coding->direction == 1 \
- && CHARSET_REVERSE_CHARSET (charset) >= 0) \
- charset = CHARSET_REVERSE_CHARSET (charset); \
- CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \
- } \
+/* Decode a composition rule from the byte C1 (and maybe one more byte
+ from SRC) and store one encoded composition rule in
+ coding->cmp_data. */
+
+#define DECODE_COMPOSITION_RULE(c1) \
+ do { \
+ int rule = 0; \
+ (c1) -= 32; \
+ if (c1 < 81) /* old format (before ver.21) */ \
+ { \
+ int gref = (c1) / 9; \
+ int nref = (c1) % 9; \
+ if (gref == 4) gref = 10; \
+ if (nref == 4) nref = 10; \
+ rule = COMPOSITION_ENCODE_RULE (gref, nref); \
+ } \
+ else if (c1 < 93) /* new format (after ver.21) */ \
+ { \
+ ONE_MORE_BYTE (c2); \
+ rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \
+ } \
+ CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \
+ coding->composition_rule_follows = 0; \
} while (0)
+
/* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
-int
-decode_coding_iso2022 (coding, source, destination,
- src_bytes, dst_bytes, consumed)
+static void
+decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
unsigned char *src = source;
unsigned char *src_end = source + src_bytes;
unsigned char *dst = destination;
unsigned char *dst_end = destination + dst_bytes;
- /* Since the maximum bytes produced by each loop is 7, we subtract 6
- from DST_END to assure that overflow checking is necessary only
- at the head of loop. */
- unsigned char *adjusted_dst_end = dst_end - 6;
- int charset;
/* Charsets invoked to graphic plane 0 and 1 respectively. */
int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1);
- Lisp_Object unification_table
- = coding->character_unification_table_for_decode;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source code
+ (within macro ONE_MORE_BYTE), or when there's not enough
+ destination area to produce a character (within macro
+ EMIT_CHAR). */
+ unsigned char *src_base;
+ int c, charset;
+ Lisp_Object translation_table;
+
+ if (NILP (Venable_character_translation))
+ translation_table = Qnil;
+ else
+ {
+ translation_table = coding->translation_table_for_decode;
+ if (NILP (translation_table))
+ translation_table = Vstandard_translation_table_for_decode;
+ }
- if (!NILP (Venable_character_unification) && NILP (unification_table))
- unification_table = Vstandard_character_unification_table_for_decode;
+ coding->result = CODING_FINISH_NORMAL;
- while (src < src_end && dst < adjusted_dst_end)
+ while (1)
{
- /* SRC_BASE remembers the start position in source in each loop.
- The loop will be exited when there's not enough source text
- to analyze long escape sequence or 2-byte code (within macros
- ONE_MORE_BYTE or TWO_MORE_BYTES). In that case, SRC is reset
- to SRC_BASE before exiting. */
- unsigned char *src_base = src;
- int c1 = *src++, c2;
+ int c1, c2;
+
+ src_base = src;
+ ONE_MORE_BYTE (c1);
+ /* We produce no character or one character. */
switch (iso_code_class [c1])
{
case ISO_0x20_or_0x7F:
- if (!coding->composing
- && (charset0 < 0 || CHARSET_CHARS (charset0) == 94))
+ if (COMPOSING_P (coding) && coding->composition_rule_follows)
+ {
+ DECODE_COMPOSITION_RULE (c1);
+ continue;
+ }
+ if (charset0 < 0 || CHARSET_CHARS (charset0) == 94)
{
/* This is SPACE or DEL. */
- *dst++ = c1;
+ charset = CHARSET_ASCII;
break;
}
/* This is a graphic character, we fall down ... */
case ISO_graphic_plane_0:
- if (coding->composing == COMPOSING_WITH_RULE_RULE)
+ if (COMPOSING_P (coding) && coding->composition_rule_follows)
{
- /* This is a composition rule. */
- *dst++ = c1 | 0x80;
- coding->composing = COMPOSING_WITH_RULE_TAIL;
+ DECODE_COMPOSITION_RULE (c1);
+ continue;
}
- else
- DECODE_ISO_CHARACTER (charset0, c1);
+ charset = charset0;
break;
case ISO_0xA0_or_0xFF:
- if (charset1 < 0 || CHARSET_CHARS (charset1) == 94)
- {
- /* Invalid code. */
- *dst++ = c1;
- break;
- }
+ if (charset1 < 0 || CHARSET_CHARS (charset1) == 94
+ || coding->flags & CODING_FLAG_ISO_SEVEN_BITS)
+ goto label_invalid_code;
/* This is a graphic character, we fall down ... */
case ISO_graphic_plane_1:
- DECODE_ISO_CHARACTER (charset1, c1);
+ if (charset1 < 0)
+ goto label_invalid_code;
+ charset = charset1;
break;
- case ISO_control_code:
+ case ISO_control_0:
+ if (COMPOSING_P (coding))
+ DECODE_COMPOSITION_END ('1');
+
/* All ISO2022 control characters in this class have the
same representation in Emacs internal format. */
- *dst++ = c1;
+ if (c1 == '\n'
+ && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ && (coding->eol_type == CODING_EOL_CR
+ || coding->eol_type == CODING_EOL_CRLF))
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
+ charset = CHARSET_ASCII;
break;
+ case ISO_control_1:
+ if (COMPOSING_P (coding))
+ DECODE_COMPOSITION_END ('1');
+ goto label_invalid_code;
+
case ISO_carriage_return:
+ if (COMPOSING_P (coding))
+ DECODE_COMPOSITION_END ('1');
+
if (coding->eol_type == CODING_EOL_CR)
- {
- *dst++ = '\n';
- }
+ c1 = '\n';
else if (coding->eol_type == CODING_EOL_CRLF)
{
ONE_MORE_BYTE (c1);
- if (c1 == ISO_CODE_LF)
- *dst++ = '\n';
- else
+ if (c1 != ISO_CODE_LF)
{
+ if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
src--;
- *dst++ = c1;
+ c1 = '\r';
}
}
- else
- {
- *dst++ = c1;
- }
+ charset = CHARSET_ASCII;
break;
case ISO_shift_out:
- if (CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0)
- goto label_invalid_escape_sequence;
+ if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)
+ || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0)
+ goto label_invalid_code;
CODING_SPEC_ISO_INVOCATION (coding, 0) = 1;
charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
- break;
+ continue;
case ISO_shift_in:
+ if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT))
+ goto label_invalid_code;
CODING_SPEC_ISO_INVOCATION (coding, 0) = 0;
charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
- break;
+ continue;
case ISO_single_shift_2_7:
case ISO_single_shift_2:
+ if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT))
+ goto label_invalid_code;
/* SS2 is handled as an escape sequence of ESC 'N' */
c1 = 'N';
goto label_escape_sequence;
case ISO_single_shift_3:
+ if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT))
+ goto label_invalid_code;
/* SS2 is handled as an escape sequence of ESC 'O' */
c1 = 'O';
goto label_escape_sequence;
case '&': /* revision of following character set */
ONE_MORE_BYTE (c1);
if (!(c1 >= '@' && c1 <= '~'))
- goto label_invalid_escape_sequence;
+ goto label_invalid_code;
ONE_MORE_BYTE (c1);
if (c1 != ISO_CODE_ESC)
- goto label_invalid_escape_sequence;
+ goto label_invalid_code;
ONE_MORE_BYTE (c1);
goto label_escape_sequence;
case '$': /* designation of 2-byte character set */
+ if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION))
+ goto label_invalid_code;
ONE_MORE_BYTE (c1);
if (c1 >= '@' && c1 <= 'B')
{ /* designation of JISX0208.1978, GB2312.1980,
- or JISX0208.1980 */
+ or JISX0208.1980 */
DECODE_DESIGNATION (0, 2, 94, c1);
}
else if (c1 >= 0x28 && c1 <= 0x2B)
DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2);
}
else
- goto label_invalid_escape_sequence;
- break;
+ goto label_invalid_code;
+ /* We must update these variables now. */
+ charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
+ charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1);
+ continue;
case 'n': /* invocation of locking-shift-2 */
- if (CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0)
- goto label_invalid_escape_sequence;
+ if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)
+ || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0)
+ goto label_invalid_code;
CODING_SPEC_ISO_INVOCATION (coding, 0) = 2;
charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
- break;
+ continue;
case 'o': /* invocation of locking-shift-3 */
- if (CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0)
- goto label_invalid_escape_sequence;
+ if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)
+ || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0)
+ goto label_invalid_code;
CODING_SPEC_ISO_INVOCATION (coding, 0) = 3;
charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
- break;
+ continue;
case 'N': /* invocation of single-shift-2 */
- if (CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0)
- goto label_invalid_escape_sequence;
- ONE_MORE_BYTE (c1);
+ if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)
+ || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0)
+ goto label_invalid_code;
charset = CODING_SPEC_ISO_DESIGNATION (coding, 2);
- DECODE_ISO_CHARACTER (charset, c1);
+ ONE_MORE_BYTE (c1);
break;
case 'O': /* invocation of single-shift-3 */
- if (CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0)
- goto label_invalid_escape_sequence;
- ONE_MORE_BYTE (c1);
+ if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)
+ || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0)
+ goto label_invalid_code;
charset = CODING_SPEC_ISO_DESIGNATION (coding, 3);
- DECODE_ISO_CHARACTER (charset, c1);
- break;
-
- case '0': /* start composing without embeded rules */
- coding->composing = COMPOSING_NO_RULE_HEAD;
+ ONE_MORE_BYTE (c1);
break;
- case '1': /* end composing */
- coding->composing = COMPOSING_NO;
- break;
+ case '0': case '2': case '3': case '4': /* start composition */
+ DECODE_COMPOSITION_START (c1);
+ continue;
- case '2': /* start composing with embeded rules */
- coding->composing = COMPOSING_WITH_RULE_HEAD;
- break;
+ case '1': /* end composition */
+ DECODE_COMPOSITION_END (c1);
+ continue;
case '[': /* specification of direction */
+ if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION)
+ goto label_invalid_code;
/* For the moment, nested direction is not supported.
- So, the value of `coding->direction' is 0 or 1: 0
- means left-to-right, 1 means right-to-left. */
+ So, `coding->mode & CODING_MODE_DIRECTION' zero means
+ left-to-right, and nozero means right-to-left. */
ONE_MORE_BYTE (c1);
switch (c1)
{
case ']': /* end of the current direction */
- coding->direction = 0;
+ coding->mode &= ~CODING_MODE_DIRECTION;
case '0': /* end of the current direction */
case '1': /* start of left-to-right direction */
ONE_MORE_BYTE (c1);
if (c1 == ']')
- coding->direction = 0;
+ coding->mode &= ~CODING_MODE_DIRECTION;
else
- goto label_invalid_escape_sequence;
+ goto label_invalid_code;
break;
case '2': /* start of right-to-left direction */
ONE_MORE_BYTE (c1);
if (c1 == ']')
- coding->direction= 1;
+ coding->mode |= CODING_MODE_DIRECTION;
else
- goto label_invalid_escape_sequence;
+ goto label_invalid_code;
break;
default:
- goto label_invalid_escape_sequence;
+ goto label_invalid_code;
}
- break;
+ continue;
default:
+ if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION))
+ goto label_invalid_code;
if (c1 >= 0x28 && c1 <= 0x2B)
{ /* designation of DIMENSION1_CHARS94 character set */
ONE_MORE_BYTE (c2);
DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2);
}
else
- {
- goto label_invalid_escape_sequence;
- }
+ goto label_invalid_code;
+ /* We must update these variables now. */
+ charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
+ charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1);
+ continue;
}
- /* We must update these variables now. */
- charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0);
- charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1);
- break;
-
- label_invalid_escape_sequence:
- {
- int length = src - src_base;
+ }
- bcopy (src_base, dst, length);
- dst += length;
- }
+ /* Now we know CHARSET and 1st position code C1 of a character.
+ Produce a multibyte sequence for that character while getting
+ 2nd position code C2 if necessary. */
+ if (CHARSET_DIMENSION (charset) == 2)
+ {
+ ONE_MORE_BYTE (c2);
+ if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0)
+ /* C2 is not in a valid range. */
+ goto label_invalid_code;
}
+ c = DECODE_ISO_CHARACTER (charset, c1, c2);
+ EMIT_CHAR (c);
continue;
- label_end_of_loop:
- coding->carryover_size = src - src_base;
- bcopy (src_base, coding->carryover, coding->carryover_size);
+ label_invalid_code:
+ coding->errors++;
+ if (COMPOSING_P (coding))
+ DECODE_COMPOSITION_END ('1');
src = src_base;
- break;
+ c = *src++;
+ EMIT_CHAR (c);
}
- /* If this is the last block of the text to be decoded, we had
- better just flush out all remaining codes in the text although
- they are not valid characters. */
- if (coding->last_block)
- {
- bcopy (src, dst, src_end - src);
- dst += (src_end - src);
- src = src_end;
- }
- *consumed = src - source;
- return dst - destination;
+ label_end_of_loop:
+ coding->consumed = coding->consumed_char = src_base - source;
+ coding->produced = dst - destination;
+ return;
}
+
/* ISO2022 encoding stuff. */
/*
It is not enough to say just "ISO2022" on encoding, we have to
- specify more details. In Emacs, each coding-system of ISO2022
+ specify more details. In Emacs, each coding system of ISO2022
variant has the following specifications:
1. Initial designation to G0 thru G3.
2. Allows short-form designation?
*/
/* Produce codes (escape sequence) for designating CHARSET to graphic
- register REG. If <final-char> of CHARSET is '@', 'A', or 'B' and
- the coding system CODING allows, produce designation sequence of
- short-form. */
+ register REG at DST, and increment DST. If <final-char> of CHARSET is
+ '@', 'A', or 'B' and the coding system CODING allows, produce
+ designation sequence of short-form. */
#define ENCODE_DESIGNATION(charset, reg, coding) \
do { \
char *intermediate_char_94 = "()*+"; \
char *intermediate_char_96 = ",-./"; \
int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \
+ \
if (revision < 255) \
{ \
*dst++ = ISO_CODE_ESC; \
*dst++ = '&'; \
*dst++ = '@' + revision; \
} \
- *dst++ = ISO_CODE_ESC; \
+ *dst++ = ISO_CODE_ESC; \
if (CHARSET_DIMENSION (charset) == 1) \
{ \
if (CHARSET_CHARS (charset) == 94) \
*dst++ = '$'; \
if (CHARSET_CHARS (charset) == 94) \
{ \
- if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \
- || reg != 0 \
- || final_char < '@' || final_char > 'B') \
+ if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \
+ || reg != 0 \
+ || final_char < '@' || final_char > 'B') \
*dst++ = (unsigned char) (intermediate_char_94[reg]); \
} \
else \
- *dst++ = (unsigned char) (intermediate_char_96[reg]); \
+ *dst++ = (unsigned char) (intermediate_char_96[reg]); \
} \
- *dst++ = final_char; \
+ *dst++ = final_char; \
CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \
} while (0)
CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \
} while (0)
-#define ENCODE_SINGLE_SHIFT_3 \
- do { \
+#define ENCODE_SINGLE_SHIFT_3 \
+ do { \
if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \
- *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \
- else \
- *dst++ = ISO_CODE_SS3; \
+ *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \
+ else \
+ *dst++ = ISO_CODE_SS3; \
CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \
} while (0)
escape sequence) for ISO2022 locking-shift functions (shift-in,
shift-out, locking-shift-2, and locking-shift-3). */
-#define ENCODE_SHIFT_IN \
- do { \
- *dst++ = ISO_CODE_SI; \
+#define ENCODE_SHIFT_IN \
+ do { \
+ *dst++ = ISO_CODE_SI; \
CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \
} while (0)
-#define ENCODE_SHIFT_OUT \
- do { \
- *dst++ = ISO_CODE_SO; \
+#define ENCODE_SHIFT_OUT \
+ do { \
+ *dst++ = ISO_CODE_SO; \
CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \
} while (0)
CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \
} while (0)
-#define ENCODE_LOCKING_SHIFT_3 \
- do { \
- *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \
+#define ENCODE_LOCKING_SHIFT_3 \
+ do { \
+ *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \
CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \
} while (0)
CHARSET and whose position-code is C1. Designation and invocation
sequences are also produced in advance if necessary. */
-
#define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \
do { \
if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \
dst = encode_invocation_designation (charset, coding, dst); \
} while (1)
-#define ENCODE_ISO_CHARACTER(charset, c1, c2) \
- do { \
- int c_alt, charset_alt; \
- if (!NILP (unification_table) \
- && ((c_alt = unify_char (unification_table, -1, charset, c1, c2)) \
- >= 0)) \
- SPLIT_CHAR (c_alt, charset_alt, c1, c2); \
- else \
- charset_alt = charset; \
- if (CHARSET_DIMENSION (charset_alt) == 1) \
- ENCODE_ISO_CHARACTER_DIMENSION1 (charset_alt, c1); \
- else \
- ENCODE_ISO_CHARACTER_DIMENSION2 (charset_alt, c1, c2); \
+#define ENCODE_ISO_CHARACTER(charset, c1, c2) \
+ do { \
+ int alt_charset = charset; \
+ \
+ if (CHARSET_DEFINED_P (charset)) \
+ { \
+ if (CHARSET_DIMENSION (charset) == 1) \
+ { \
+ if (charset == CHARSET_ASCII \
+ && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \
+ alt_charset = charset_latin_jisx0201; \
+ ENCODE_ISO_CHARACTER_DIMENSION1 (alt_charset, c1); \
+ } \
+ else \
+ { \
+ if (charset == charset_jisx0208 \
+ && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \
+ alt_charset = charset_jisx0208_1978; \
+ ENCODE_ISO_CHARACTER_DIMENSION2 (alt_charset, c1, c2); \
+ } \
+ } \
+ else \
+ { \
+ *dst++ = c1; \
+ if (c2 >= 0) \
+ *dst++ = c2; \
+ } \
} while (0)
/* Produce designation and invocation codes at a place pointed by DST
break;
}
}
+
return dst;
}
-/* The following two macros produce codes for indicating composition. */
-#define ENCODE_COMPOSITION_NO_RULE_START *dst++ = ISO_CODE_ESC, *dst++ = '0'
-#define ENCODE_COMPOSITION_WITH_RULE_START *dst++ = ISO_CODE_ESC, *dst++ = '2'
-#define ENCODE_COMPOSITION_END *dst++ = ISO_CODE_ESC, *dst++ = '1'
+/* Produce 2-byte codes for encoded composition rule RULE. */
-/* The following three macros produce codes for indicating direction
- of text. */
-#define ENCODE_CONTROL_SEQUENCE_INTRODUCER \
- do { \
- if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \
- *dst++ = ISO_CODE_ESC, *dst++ = '['; \
- else \
- *dst++ = ISO_CODE_CSI; \
+#define ENCODE_COMPOSITION_RULE(rule) \
+ do { \
+ int gref, nref; \
+ COMPOSITION_DECODE_RULE (rule, gref, nref); \
+ *dst++ = 32 + 81 + gref; \
+ *dst++ = 32 + nref; \
} while (0)
-#define ENCODE_DIRECTION_R2L \
- ENCODE_CONTROL_SEQUENCE_INTRODUCER, *dst++ = '2', *dst++ = ']'
+/* Produce codes for indicating the start of a composition sequence
+ (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers
+ which specify information about the composition. See the comment
+ in coding.h for the format of DATA. */
-#define ENCODE_DIRECTION_L2R \
- ENCODE_CONTROL_SEQUENCE_INTRODUCER, *dst++ = '0', *dst++ = ']'
+#define ENCODE_COMPOSITION_START(coding, data) \
+ do { \
+ coding->composing = data[3]; \
+ *dst++ = ISO_CODE_ESC; \
+ if (coding->composing == COMPOSITION_RELATIVE) \
+ *dst++ = '0'; \
+ else \
+ { \
+ *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \
+ ? '3' : '4'); \
+ coding->cmp_data_index = coding->cmp_data_start + 4; \
+ coding->composition_rule_follows = 0; \
+ } \
+ } while (0)
-/* Produce codes for designation and invocation to reset the graphic
- planes and registers to initial state. */
+/* Produce codes for indicating the end of the current composition. */
+
+#define ENCODE_COMPOSITION_END(coding, data) \
+ do { \
+ *dst++ = ISO_CODE_ESC; \
+ *dst++ = '1'; \
+ coding->cmp_data_start += data[0]; \
+ coding->composing = COMPOSITION_NO; \
+ if (coding->cmp_data_start == coding->cmp_data->used \
+ && coding->cmp_data->next) \
+ { \
+ coding->cmp_data = coding->cmp_data->next; \
+ coding->cmp_data_start = 0; \
+ } \
+ } while (0)
+
+/* Produce composition start sequence ESC 0. Here, this sequence
+ doesn't mean the start of a new composition but means that we have
+ just produced components (alternate chars and composition rules) of
+ the composition and the actual text follows in SRC. */
+
+#define ENCODE_COMPOSITION_FAKE_START(coding) \
+ do { \
+ *dst++ = ISO_CODE_ESC; \
+ *dst++ = '0'; \
+ coding->composing = COMPOSITION_RELATIVE; \
+ } while (0)
+
+/* The following three macros produce codes for indicating direction
+ of text. */
+#define ENCODE_CONTROL_SEQUENCE_INTRODUCER \
+ do { \
+ if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \
+ *dst++ = ISO_CODE_ESC, *dst++ = '['; \
+ else \
+ *dst++ = ISO_CODE_CSI; \
+ } while (0)
+
+#define ENCODE_DIRECTION_R2L \
+ ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']'
+
+#define ENCODE_DIRECTION_L2R \
+ ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']'
+
+/* Produce codes for designation and invocation to reset the graphic
+ planes and registers to initial state. */
#define ENCODE_RESET_PLANE_AND_REGISTER \
do { \
int reg; \
} while (0)
/* Produce designation sequences of charsets in the line started from
- *SRC to a place pointed by DSTP.
+ SRC to a place pointed by DST, and return updated DST.
If the current block ends before any end-of-line, we may fail to
- find all the necessary *designations. */
-encode_designation_at_bol (coding, table, src, src_end, dstp)
+ find all the necessary designations. */
+
+static unsigned char *
+encode_designation_at_bol (coding, translation_table, src, src_end, dst)
struct coding_system *coding;
- Lisp_Object table;
- unsigned char *src, *src_end, **dstp;
+ Lisp_Object translation_table;
+ unsigned char *src, *src_end, *dst;
{
int charset, c, found = 0, reg;
/* Table of charsets to be designated to each graphic register. */
int r[4];
- unsigned char *dst = *dstp;
for (reg = 0; reg < 4; reg++)
r[reg] = -1;
- while (src < src_end && *src != '\n' && found < 4)
+ while (found < 4)
{
- int bytes = BYTES_BY_CHAR_HEAD (*src);
+ ONE_MORE_CHAR (c);
+ if (c == '\n')
+ break;
- if (NILP (table))
- charset = CHARSET_AT (src);
- else
- {
- int c_alt;
- unsigned char c1, c2;
-
- SPLIT_STRING(src, bytes, charset, c1, c2);
- if ((c_alt = unify_char (table, -1, charset, c1, c2)) >= 0)
- charset = CHAR_CHARSET (c_alt);
- }
-
+ charset = CHAR_CHARSET (c);
reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset);
- if (r[reg] < 0)
+ if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0)
{
found++;
r[reg] = charset;
}
-
- src += bytes;
}
+ label_end_of_loop:
if (found)
{
for (reg = 0; reg < 4; reg++)
if (r[reg] >= 0
&& CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg])
ENCODE_DESIGNATION (r[reg], reg, coding);
- *dstp = dst;
}
+
+ return dst;
}
/* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */
-int
-encode_coding_iso2022 (coding, source, destination,
- src_bytes, dst_bytes, consumed)
+static void
+encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
unsigned char *src = source;
unsigned char *src_end = source + src_bytes;
from DST_END to assure overflow checking is necessary only at the
head of loop. */
unsigned char *adjusted_dst_end = dst_end - 19;
- Lisp_Object unification_table
- = coding->character_unification_table_for_encode;
-
- if (!NILP (Venable_character_unification) && NILP (unification_table))
- unification_table = Vstandard_character_unification_table_for_encode;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source text to
+ analyze multi-byte codes (within macro ONE_MORE_CHAR), or when
+ there's not enough destination area to produce encoded codes
+ (within macro EMIT_BYTES). */
+ unsigned char *src_base;
+ int c;
+ Lisp_Object translation_table;
+
+ if (NILP (Venable_character_translation))
+ translation_table = Qnil;
+ else
+ {
+ translation_table = coding->translation_table_for_encode;
+ if (NILP (translation_table))
+ translation_table = Vstandard_translation_table_for_encode;
+ }
- while (src < src_end && dst < adjusted_dst_end)
+ coding->consumed_char = 0;
+ coding->errors = 0;
+ while (1)
{
- /* SRC_BASE remembers the start position in source in each loop.
- The loop will be exited when there's not enough source text
- to analyze multi-byte codes (within macros ONE_MORE_BYTE,
- TWO_MORE_BYTES, and THREE_MORE_BYTES). In that case, SRC is
- reset to SRC_BASE before exiting. */
- unsigned char *src_base = src;
- int charset, c1, c2, c3, c4;
+ int charset, c1, c2;
+
+ src_base = src;
+
+ if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19)))
+ {
+ coding->result = CODING_FINISH_INSUFFICIENT_DST;
+ break;
+ }
if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL
&& CODING_SPEC_ISO_BOL (coding))
{
/* We have to produce designation sequences if any now. */
- encode_designation_at_bol (coding, unification_table,
- src, src_end, &dst);
+ dst = encode_designation_at_bol (coding, translation_table,
+ src, src_end, dst);
CODING_SPEC_ISO_BOL (coding) = 0;
}
- c1 = *src++;
- /* If we are seeing a component of a composite character, we are
- seeing a leading-code specially encoded for composition, or a
- composition rule if composing with rule. We must set C1
- to a normal leading-code or an ASCII code. If we are not at
- a composed character, we must reset the composition state. */
- if (COMPOSING_P (coding->composing))
+ /* Check composition start and end. */
+ if (coding->composing != COMPOSITION_DISABLED
+ && coding->cmp_data_start < coding->cmp_data->used)
{
- if (c1 < 0xA0)
+ struct composition_data *cmp_data = coding->cmp_data;
+ int *data = cmp_data->data + coding->cmp_data_start;
+ int this_pos = cmp_data->char_offset + coding->consumed_char;
+
+ if (coding->composing == COMPOSITION_RELATIVE)
{
- /* We are not in a composite character any longer. */
- coding->composing = COMPOSING_NO;
- ENCODE_COMPOSITION_END;
+ if (this_pos == data[2])
+ {
+ ENCODE_COMPOSITION_END (coding, data);
+ cmp_data = coding->cmp_data;
+ data = cmp_data->data + coding->cmp_data_start;
+ }
}
- else
+ else if (COMPOSING_P (coding))
{
- if (coding->composing == COMPOSING_WITH_RULE_RULE)
+ /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */
+ if (coding->cmp_data_index == coding->cmp_data_start + data[0])
+ /* We have consumed components of the composition.
+ What follows in SRC is the compositions's base
+ text. */
+ ENCODE_COMPOSITION_FAKE_START (coding);
+ else
{
- *dst++ = c1 & 0x7F;
- coding->composing = COMPOSING_WITH_RULE_HEAD;
+ int c = cmp_data->data[coding->cmp_data_index++];
+ if (coding->composition_rule_follows)
+ {
+ ENCODE_COMPOSITION_RULE (c);
+ coding->composition_rule_follows = 0;
+ }
+ else
+ {
+ SPLIT_CHAR (c, charset, c1, c2);
+ ENCODE_ISO_CHARACTER (charset, c1, c2);
+ if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS)
+ coding->composition_rule_follows = 1;
+ }
continue;
}
- else if (coding->composing == COMPOSING_WITH_RULE_HEAD)
- coding->composing = COMPOSING_WITH_RULE_RULE;
- if (c1 == 0xA0)
+ }
+ if (!COMPOSING_P (coding))
+ {
+ if (this_pos == data[1])
{
- /* This is an ASCII component. */
- ONE_MORE_BYTE (c1);
- c1 &= 0x7F;
+ ENCODE_COMPOSITION_START (coding, data);
+ continue;
}
- else
- /* This is a leading-code of non ASCII component. */
- c1 -= 0x20;
}
}
-
- /* Now encode one character. C1 is a control character, an
- ASCII character, or a leading-code of multi-byte character. */
- switch (emacs_code_class[c1])
- {
- case EMACS_ascii_code:
- ENCODE_ISO_CHARACTER (CHARSET_ASCII, c1, /* dummy */ c2);
- break;
-
- case EMACS_control_code:
- if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL)
- ENCODE_RESET_PLANE_AND_REGISTER;
- *dst++ = c1;
- break;
-
- case EMACS_carriage_return_code:
- if (!coding->selective)
- {
- if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL)
- ENCODE_RESET_PLANE_AND_REGISTER;
- *dst++ = c1;
- break;
- }
- /* fall down to treat '\r' as '\n' ... */
-
- case EMACS_linefeed_code:
- if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL)
- ENCODE_RESET_PLANE_AND_REGISTER;
- if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL)
- bcopy (coding->spec.iso2022.initial_designation,
- coding->spec.iso2022.current_designation,
- sizeof coding->spec.iso2022.initial_designation);
- if (coding->eol_type == CODING_EOL_LF
- || coding->eol_type == CODING_EOL_UNDECIDED)
- *dst++ = ISO_CODE_LF;
- else if (coding->eol_type == CODING_EOL_CRLF)
- *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF;
- else
- *dst++ = ISO_CODE_CR;
- CODING_SPEC_ISO_BOL (coding) = 1;
- break;
-
- case EMACS_leading_code_2:
- ONE_MORE_BYTE (c2);
- if (c2 < 0xA0)
- {
- /* invalid sequence */
- *dst++ = c1;
- *dst++ = c2;
- }
- else
- ENCODE_ISO_CHARACTER (c1, c2, /* dummy */ c3);
- break;
- case EMACS_leading_code_3:
- TWO_MORE_BYTES (c2, c3);
- if (c2 < 0xA0 || c3 < 0xA0)
- {
- /* invalid sequence */
- *dst++ = c1;
- *dst++ = c2;
- *dst++ = c3;
- }
- else if (c1 < LEADING_CODE_PRIVATE_11)
- ENCODE_ISO_CHARACTER (c1, c2, c3);
- else
- ENCODE_ISO_CHARACTER (c2, c3, /* dummy */ c4);
- break;
-
- case EMACS_leading_code_4:
- THREE_MORE_BYTES (c2, c3, c4);
- if (c2 < 0xA0 || c3 < 0xA0 || c4 < 0xA0)
- {
- /* invalid sequence */
- *dst++ = c1;
- *dst++ = c2;
- *dst++ = c3;
- *dst++ = c4;
- }
- else
- ENCODE_ISO_CHARACTER (c2, c3, c4);
- break;
+ ONE_MORE_CHAR (c);
- case EMACS_leading_code_composition:
- ONE_MORE_BYTE (c2);
- if (c2 < 0xA0)
+ /* Now encode the character C. */
+ if (c < 0x20 || c == 0x7F)
+ {
+ if (c == '\r')
{
- /* invalid sequence */
- *dst++ = c1;
- *dst++ = c2;
+ if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY))
+ {
+ if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL)
+ ENCODE_RESET_PLANE_AND_REGISTER;
+ *dst++ = c;
+ continue;
+ }
+ /* fall down to treat '\r' as '\n' ... */
+ c = '\n';
}
- else if (c2 == 0xFF)
+ if (c == '\n')
{
- coding->composing = COMPOSING_WITH_RULE_HEAD;
- ENCODE_COMPOSITION_WITH_RULE_START;
+ if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL)
+ ENCODE_RESET_PLANE_AND_REGISTER;
+ if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL)
+ bcopy (coding->spec.iso2022.initial_designation,
+ coding->spec.iso2022.current_designation,
+ sizeof coding->spec.iso2022.initial_designation);
+ if (coding->eol_type == CODING_EOL_LF
+ || coding->eol_type == CODING_EOL_UNDECIDED)
+ *dst++ = ISO_CODE_LF;
+ else if (coding->eol_type == CODING_EOL_CRLF)
+ *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF;
+ else
+ *dst++ = ISO_CODE_CR;
+ CODING_SPEC_ISO_BOL (coding) = 1;
}
- else
+ else
{
- /* Rewind one byte because it is a character code of
- composition elements. */
- src--;
- coding->composing = COMPOSING_NO_RULE_HEAD;
- ENCODE_COMPOSITION_NO_RULE_START;
+ if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL)
+ ENCODE_RESET_PLANE_AND_REGISTER;
+ *dst++ = c;
}
- break;
-
- case EMACS_invalid_code:
- *dst++ = c1;
- break;
}
- continue;
- label_end_of_loop:
- /* We reach here because the source date ends not at character
- boundary. */
- coding->carryover_size = src_end - src_base;
- bcopy (src_base, coding->carryover, coding->carryover_size);
- src = src_end;
- break;
- }
-
- /* If this is the last block of the text to be encoded, we must
- reset graphic planes and registers to the initial state. */
- if (src >= src_end && coding->last_block)
- {
- ENCODE_RESET_PLANE_AND_REGISTER;
- if (coding->carryover_size > 0
- && coding->carryover_size < (dst_end - dst))
+ else if (ASCII_BYTE_P (c))
+ ENCODE_ISO_CHARACTER (CHARSET_ASCII, c, /* dummy */ c1);
+ else if (SINGLE_BYTE_CHAR_P (c))
+ {
+ *dst++ = c;
+ coding->errors++;
+ }
+ else
{
- bcopy (coding->carryover, dst, coding->carryover_size);
- dst += coding->carryover_size;
- coding->carryover_size = 0;
+ SPLIT_CHAR (c, charset, c1, c2);
+ ENCODE_ISO_CHARACTER (charset, c1, c2);
}
+
+ coding->consumed_char++;
}
- *consumed = src - source;
- return dst - destination;
+
+ label_end_of_loop:
+ coding->consumed = src_base - source;
+ coding->produced = coding->produced_char = dst - destination;
}
\f
(character set) (range)
ASCII 0x00 .. 0x7F
KATAKANA-JISX0201 0xA0 .. 0xDF
- JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xFF
- (2nd byte) 0x40 .. 0xFF
+ JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF
+ (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
-------------------------------
*/
b2 += b2 < 0x3F ? 0x40 : 0x62; \
} while (0)
-#define DECODE_SJIS_BIG5_CHARACTER(charset, c1, c2) \
- do { \
- int c_alt, charset_alt = (charset); \
- if (!NILP (unification_table) \
- && ((c_alt = unify_char (unification_table, \
- -1, (charset), c1, c2)) >= 0)) \
- SPLIT_CHAR (c_alt, charset_alt, c1, c2); \
- if (charset_alt == CHARSET_ASCII || charset_alt < 0) \
- DECODE_CHARACTER_ASCII (c1); \
- else if (CHARSET_DIMENSION (charset_alt) == 1) \
- DECODE_CHARACTER_DIMENSION1 (charset_alt, c1); \
- else \
- DECODE_CHARACTER_DIMENSION2 (charset_alt, c1, c2); \
- } while (0)
-
-#define ENCODE_SJIS_BIG5_CHARACTER(charset, c1, c2) \
- do { \
- int c_alt, charset_alt; \
- if (!NILP (unification_table) \
- && ((c_alt = unify_char (unification_table, -1, charset, c1, c2)) \
- >= 0)) \
- SPLIT_CHAR (c_alt, charset_alt, c1, c2); \
- else \
- charset_alt = charset; \
- if (charset_alt == charset_ascii) \
- *dst++ = c1; \
- else if (CHARSET_DIMENSION (charset_alt) == 1) \
- { \
- if (sjis_p && charset_alt == charset_katakana_jisx0201) \
- *dst++ = c1; \
- else \
- *dst++ = charset_alt, *dst++ = c1; \
- } \
- else \
- { \
- c1 &= 0x7F, c2 &= 0x7F; \
- if (sjis_p && charset_alt == charset_jisx0208) \
- { \
- unsigned char s1, s2; \
- \
- ENCODE_SJIS (c1, c2, s1, s2); \
- *dst++ = s1, *dst++ = s2; \
- } \
- else if (!sjis_p \
- && (charset_alt == charset_big5_1 \
- || charset_alt == charset_big5_2)) \
- { \
- unsigned char b1, b2; \
- \
- ENCODE_BIG5 (charset_alt, c1, c2, b1, b2); \
- *dst++ = b1, *dst++ = b2; \
- } \
- else \
- *dst++ = charset_alt, *dst++ = c1, *dst++ = c2; \
- } \
- } while (0);
-
/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
Check if a text is encoded in SJIS. If it is, return
CODING_CATEGORY_MASK_SJIS, else return 0. */
detect_coding_sjis (src, src_end)
unsigned char *src, *src_end;
{
- unsigned char c;
+ int c;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
- while (src < src_end)
+ while (1)
{
- c = *src++;
- if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
- return 0;
+ ONE_MORE_BYTE (c);
if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
{
- if (src < src_end && *src++ < 0x40)
+ ONE_MORE_BYTE (c);
+ if (c < 0x40)
return 0;
}
}
+ label_end_of_loop:
return CODING_CATEGORY_MASK_SJIS;
}
detect_coding_big5 (src, src_end)
unsigned char *src, *src_end;
{
- unsigned char c;
+ int c;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
- while (src < src_end)
+ while (1)
{
- c = *src++;
- if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
- return 0;
+ ONE_MORE_BYTE (c);
if (c >= 0xA1)
{
- if (src >= src_end)
- break;
- c = *src++;
+ ONE_MORE_BYTE (c);
if (c < 0x40 || (c >= 0x7F && c <= 0xA0))
return 0;
}
}
+ label_end_of_loop:
return CODING_CATEGORY_MASK_BIG5;
}
+/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
+ Check if a text is encoded in UTF-8. If it is, return
+ CODING_CATEGORY_MASK_UTF_8, else return 0. */
+
+#define UTF_8_1_OCTET_P(c) ((c) < 0x80)
+#define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80)
+#define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0)
+#define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0)
+#define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0)
+#define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8)
+#define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC)
+
+int
+detect_coding_utf_8 (src, src_end)
+ unsigned char *src, *src_end;
+{
+ unsigned char c;
+ int seq_maybe_bytes;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
+
+ while (1)
+ {
+ ONE_MORE_BYTE (c);
+ if (UTF_8_1_OCTET_P (c))
+ continue;
+ else if (UTF_8_2_OCTET_LEADING_P (c))
+ seq_maybe_bytes = 1;
+ else if (UTF_8_3_OCTET_LEADING_P (c))
+ seq_maybe_bytes = 2;
+ else if (UTF_8_4_OCTET_LEADING_P (c))
+ seq_maybe_bytes = 3;
+ else if (UTF_8_5_OCTET_LEADING_P (c))
+ seq_maybe_bytes = 4;
+ else if (UTF_8_6_OCTET_LEADING_P (c))
+ seq_maybe_bytes = 5;
+ else
+ return 0;
+
+ do
+ {
+ ONE_MORE_BYTE (c);
+ if (!UTF_8_EXTRA_OCTET_P (c))
+ return 0;
+ seq_maybe_bytes--;
+ }
+ while (seq_maybe_bytes > 0);
+ }
+
+ label_end_of_loop:
+ return CODING_CATEGORY_MASK_UTF_8;
+}
+
+/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
+ Check if a text is encoded in UTF-16 Big Endian (endian == 1) or
+ Little Endian (otherwise). If it is, return
+ CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE,
+ else return 0. */
+
+#define UTF_16_INVALID_P(val) \
+ (((val) == 0xFFFE) \
+ || ((val) == 0xFFFF))
+
+#define UTF_16_HIGH_SURROGATE_P(val) \
+ (((val) & 0xD800) == 0xD800)
+
+#define UTF_16_LOW_SURROGATE_P(val) \
+ (((val) & 0xDC00) == 0xDC00)
+
+int
+detect_coding_utf_16 (src, src_end)
+ unsigned char *src, *src_end;
+{
+ unsigned char c1, c2;
+ /* Dummy for TWO_MORE_BYTES. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
+
+ TWO_MORE_BYTES (c1, c2);
+
+ if ((c1 == 0xFF) && (c2 == 0xFE))
+ return CODING_CATEGORY_MASK_UTF_16_LE;
+ else if ((c1 == 0xFE) && (c2 == 0xFF))
+ return CODING_CATEGORY_MASK_UTF_16_BE;
+
+ label_end_of_loop:
+ return 0;
+}
+
/* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions".
If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */
-int
+static void
decode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed, sjis_p)
+ src_bytes, dst_bytes, sjis_p)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
int sjis_p;
{
unsigned char *src = source;
unsigned char *src_end = source + src_bytes;
unsigned char *dst = destination;
unsigned char *dst_end = destination + dst_bytes;
- /* Since the maximum bytes produced by each loop is 4, we subtract 3
- from DST_END to assure overflow checking is necessary only at the
- head of loop. */
- unsigned char *adjusted_dst_end = dst_end - 3;
- Lisp_Object unification_table
- = coding->character_unification_table_for_decode;
-
- if (!NILP (Venable_character_unification) && NILP (unification_table))
- unification_table = Vstandard_character_unification_table_for_decode;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source code
+ (within macro ONE_MORE_BYTE), or when there's not enough
+ destination area to produce a character (within macro
+ EMIT_CHAR). */
+ unsigned char *src_base;
+ Lisp_Object translation_table;
+
+ if (NILP (Venable_character_translation))
+ translation_table = Qnil;
+ else
+ {
+ translation_table = coding->translation_table_for_decode;
+ if (NILP (translation_table))
+ translation_table = Vstandard_translation_table_for_decode;
+ }
- while (src < src_end && dst < adjusted_dst_end)
+ coding->produced_char = 0;
+ while (1)
{
- /* SRC_BASE remembers the start position in source in each loop.
- The loop will be exited when there's not enough source text
- to analyze two-byte character (within macro ONE_MORE_BYTE).
- In that case, SRC is reset to SRC_BASE before exiting. */
- unsigned char *src_base = src;
- unsigned char c1 = *src++, c2, c3, c4;
-
- if (c1 == '\r')
+ int c, charset, c1, c2;
+
+ src_base = src;
+ ONE_MORE_BYTE (c1);
+
+ if (c1 < 0x80)
{
- if (coding->eol_type == CODING_EOL_CRLF)
+ charset = CHARSET_ASCII;
+ if (c1 < 0x20)
{
- ONE_MORE_BYTE (c2);
- if (c2 == '\n')
- *dst++ = c2;
- else
- /* To process C2 again, SRC is subtracted by 1. */
- *dst++ = c1, src--;
+ if (c1 == '\r')
+ {
+ if (coding->eol_type == CODING_EOL_CRLF)
+ {
+ ONE_MORE_BYTE (c2);
+ if (c2 == '\n')
+ c1 = c2;
+ else if (coding->mode
+ & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
+ else
+ /* To process C2 again, SRC is subtracted by 1. */
+ src--;
+ }
+ else if (coding->eol_type == CODING_EOL_CR)
+ c1 = '\n';
+ }
+ else if (c1 == '\n'
+ && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ && (coding->eol_type == CODING_EOL_CR
+ || coding->eol_type == CODING_EOL_CRLF))
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
}
- else
- *dst++ = c1;
}
- else if (c1 < 0x20)
- *dst++ = c1;
- else if (c1 < 0x80)
- DECODE_SJIS_BIG5_CHARACTER (charset_ascii, c1, /* dummy */ c2);
- else if (c1 < 0xA0 || c1 >= 0xE0)
- {
- /* SJIS -> JISX0208, BIG5 -> Big5 (only if 0xE0 <= c1 < 0xFF) */
+ else
+ {
if (sjis_p)
{
- ONE_MORE_BYTE (c2);
- DECODE_SJIS (c1, c2, c3, c4);
- DECODE_SJIS_BIG5_CHARACTER (charset_jisx0208, c3, c4);
- }
- else if (c1 >= 0xE0 && c1 < 0xFF)
- {
- int charset;
-
- ONE_MORE_BYTE (c2);
- DECODE_BIG5 (c1, c2, charset, c3, c4);
- DECODE_SJIS_BIG5_CHARACTER (charset, c3, c4);
+ if (c1 >= 0xF0)
+ goto label_invalid_code;
+ if (c1 < 0xA0 || c1 >= 0xE0)
+ {
+ /* SJIS -> JISX0208 */
+ ONE_MORE_BYTE (c2);
+ if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC)
+ goto label_invalid_code;
+ DECODE_SJIS (c1, c2, c1, c2);
+ charset = charset_jisx0208;
+ }
+ else
+ /* SJIS -> JISX0201-Kana */
+ charset = charset_katakana_jisx0201;
}
- else /* Invalid code */
- *dst++ = c1;
- }
- else
- {
- /* SJIS -> JISX0201-Kana, BIG5 -> Big5 */
- if (sjis_p)
- DECODE_SJIS_BIG5_CHARACTER (charset_katakana_jisx0201, c1, /* dummy */ c2);
else
{
- int charset;
-
+ /* BIG5 -> Big5 */
+ if (c1 < 0xA1 || c1 > 0xFE)
+ goto label_invalid_code;
ONE_MORE_BYTE (c2);
- DECODE_BIG5 (c1, c2, charset, c3, c4);
- DECODE_SJIS_BIG5_CHARACTER (charset, c3, c4);
+ if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE)
+ goto label_invalid_code;
+ DECODE_BIG5 (c1, c2, charset, c1, c2);
}
}
+
+ c = DECODE_ISO_CHARACTER (charset, c1, c2);
+ EMIT_CHAR (c);
continue;
- label_end_of_loop:
- coding->carryover_size = src - src_base;
- bcopy (src_base, coding->carryover, coding->carryover_size);
+ label_invalid_code:
+ coding->errors++;
src = src_base;
- break;
+ c = *src++;
+ EMIT_CHAR (c);
}
- *consumed = src - source;
- return dst - destination;
+ label_end_of_loop:
+ coding->consumed = coding->consumed_char = src_base - source;
+ coding->produced = dst - destination;
+ return;
}
/* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions".
- This function can encode `charset_ascii', `charset_katakana_jisx0201',
- `charset_jisx0208', `charset_big5_1', and `charset_big5-2'. We are
- sure that all these charsets are registered as official charset
+ This function can encode charsets `ascii', `katakana-jisx0201',
+ `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We
+ are sure that all these charsets are registered as official charset
(i.e. do not have extended leading-codes). Characters of other
charsets are produced without any encoding. If SJIS_P is 1, encode
SJIS text, else encode BIG5 text. */
-int
+static void
encode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed, sjis_p)
+ src_bytes, dst_bytes, sjis_p)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
int sjis_p;
{
unsigned char *src = source;
unsigned char *src_end = source + src_bytes;
unsigned char *dst = destination;
unsigned char *dst_end = destination + dst_bytes;
- /* Since the maximum bytes produced by each loop is 2, we subtract 1
- from DST_END to assure overflow checking is necessary only at the
- head of loop. */
- unsigned char *adjusted_dst_end = dst_end - 1;
- Lisp_Object unification_table
- = coding->character_unification_table_for_encode;
-
- if (!NILP (Venable_character_unification) && NILP (unification_table))
- unification_table = Vstandard_character_unification_table_for_encode;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source text to
+ analyze multi-byte codes (within macro ONE_MORE_CHAR), or when
+ there's not enough destination area to produce encoded codes
+ (within macro EMIT_BYTES). */
+ unsigned char *src_base;
+ Lisp_Object translation_table;
+
+ if (NILP (Venable_character_translation))
+ translation_table = Qnil;
+ else
+ {
+ translation_table = coding->translation_table_for_decode;
+ if (NILP (translation_table))
+ translation_table = Vstandard_translation_table_for_decode;
+ }
- while (src < src_end && dst < adjusted_dst_end)
+ while (1)
{
- /* SRC_BASE remembers the start position in source in each loop.
- The loop will be exited when there's not enough source text
- to analyze multi-byte codes (within macros ONE_MORE_BYTE and
- TWO_MORE_BYTES). In that case, SRC is reset to SRC_BASE
- before exiting. */
- unsigned char *src_base = src;
- unsigned char c1 = *src++, c2, c3, c4;
-
- if (coding->composing)
+ int c, charset, c1, c2;
+
+ src_base = src;
+ ONE_MORE_CHAR (c);
+
+ /* Now encode the character C. */
+ if (SINGLE_BYTE_CHAR_P (c))
{
- if (c1 == 0xA0)
+ switch (c)
{
- ONE_MORE_BYTE (c1);
- c1 &= 0x7F;
+ case '\r':
+ if (!coding->mode & CODING_MODE_SELECTIVE_DISPLAY)
+ {
+ EMIT_ONE_BYTE (c);
+ break;
+ }
+ c = '\n';
+ case '\n':
+ if (coding->eol_type == CODING_EOL_CRLF)
+ {
+ EMIT_TWO_BYTES ('\r', c);
+ break;
+ }
+ else if (coding->eol_type == CODING_EOL_CR)
+ c = '\r';
+ default:
+ EMIT_ONE_BYTE (c);
}
- else if (c1 >= 0xA0)
- c1 -= 0x20;
- else
- coding->composing = 0;
}
-
- switch (emacs_code_class[c1])
+ else
{
- case EMACS_ascii_code:
- ENCODE_SJIS_BIG5_CHARACTER (charset_ascii, c1, /* dummy */ c2);
- break;
-
- case EMACS_control_code:
- *dst++ = c1;
- break;
-
- case EMACS_carriage_return_code:
- if (!coding->selective)
+ SPLIT_CHAR (c, charset, c1, c2);
+ if (sjis_p)
{
- *dst++ = c1;
- break;
+ if (charset == charset_jisx0208
+ || charset == charset_jisx0208_1978)
+ {
+ ENCODE_SJIS (c1, c2, c1, c2);
+ EMIT_TWO_BYTES (c1, c2);
+ }
+ else if (charset == charset_latin_jisx0201)
+ EMIT_ONE_BYTE (c1);
+ else
+ /* There's no way other than producing the internal
+ codes as is. */
+ EMIT_BYTES (src_base, src);
}
- /* fall down to treat '\r' as '\n' ... */
-
- case EMACS_linefeed_code:
- if (coding->eol_type == CODING_EOL_LF
- || coding->eol_type == CODING_EOL_UNDECIDED)
- *dst++ = '\n';
- else if (coding->eol_type == CODING_EOL_CRLF)
- *dst++ = '\r', *dst++ = '\n';
else
- *dst++ = '\r';
- break;
-
- case EMACS_leading_code_2:
- ONE_MORE_BYTE (c2);
- ENCODE_SJIS_BIG5_CHARACTER (c1, c2, /* dummy */ c3);
- break;
+ {
+ if (charset == charset_big5_1 || charset == charset_big5_2)
+ {
+ ENCODE_BIG5 (charset, c1, c2, c1, c2);
+ EMIT_TWO_BYTES (c1, c2);
+ }
+ else
+ /* There's no way other than producing the internal
+ codes as is. */
+ EMIT_BYTES (src_base, src);
+ }
+ }
+ coding->consumed_char++;
+ }
- case EMACS_leading_code_3:
- TWO_MORE_BYTES (c2, c3);
- ENCODE_SJIS_BIG5_CHARACTER (c1, c2, c3);
- break;
+ label_end_of_loop:
+ coding->consumed = src_base - source;
+ coding->produced = coding->produced_char = dst - destination;
+}
- case EMACS_leading_code_4:
- THREE_MORE_BYTES (c2, c3, c4);
- ENCODE_SJIS_BIG5_CHARACTER (c2, c3, c4);
- break;
+\f
+/*** 5. CCL handlers ***/
- case EMACS_leading_code_composition:
- coding->composing = 1;
- break;
+/* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
+ Check if a text is encoded in a coding system of which
+ encoder/decoder are written in CCL program. If it is, return
+ CODING_CATEGORY_MASK_CCL, else return 0. */
- default: /* i.e. case EMACS_invalid_code: */
- *dst++ = c1;
- }
- continue;
+int
+detect_coding_ccl (src, src_end)
+ unsigned char *src, *src_end;
+{
+ unsigned char *valid;
+ int c;
+ /* Dummy for ONE_MORE_BYTE. */
+ struct coding_system dummy_coding;
+ struct coding_system *coding = &dummy_coding;
+
+ /* No coding system is assigned to coding-category-ccl. */
+ if (!coding_system_table[CODING_CATEGORY_IDX_CCL])
+ return 0;
- label_end_of_loop:
- coding->carryover_size = src_end - src_base;
- bcopy (src_base, coding->carryover, coding->carryover_size);
- src = src_end;
- break;
+ valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes;
+ while (1)
+ {
+ ONE_MORE_BYTE (c);
+ if (! valid[c])
+ return 0;
}
-
- *consumed = src - source;
- return dst - destination;
+ label_end_of_loop:
+ return CODING_CATEGORY_MASK_CCL;
}
\f
-/*** 5. End-of-line handlers ***/
+/*** 6. End-of-line handlers ***/
-/* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions".
- This function is called only when `coding->eol_type' is
- CODING_EOL_CRLF or CODING_EOL_CR. */
+/* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */
-decode_eol (coding, source, destination, src_bytes, dst_bytes, consumed)
+static void
+decode_eol (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
unsigned char *src = source;
- unsigned char *src_end = source + src_bytes;
unsigned char *dst = destination;
- unsigned char *dst_end = destination + dst_bytes;
- int produced;
-
+ unsigned char *src_end = src + src_bytes;
+ unsigned char *dst_end = dst + dst_bytes;
+ Lisp_Object translation_table;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source code
+ (within macro ONE_MORE_BYTE), or when there's not enough
+ destination area to produce a character (within macro
+ EMIT_CHAR). */
+ unsigned char *src_base;
+ int c;
+
+ translation_table = Qnil;
switch (coding->eol_type)
{
case CODING_EOL_CRLF:
- {
- /* Since the maximum bytes produced by each loop is 2, we
- subtract 1 from DST_END to assure overflow checking is
- necessary only at the head of loop. */
- unsigned char *adjusted_dst_end = dst_end - 1;
-
- while (src < src_end && dst < adjusted_dst_end)
- {
- unsigned char *src_base = src;
- unsigned char c = *src++;
- if (c == '\r')
- {
- ONE_MORE_BYTE (c);
- if (c != '\n')
- *dst++ = '\r';
- *dst++ = c;
- }
- else
- *dst++ = c;
- continue;
-
- label_end_of_loop:
- coding->carryover_size = src - src_base;
- bcopy (src_base, coding->carryover, coding->carryover_size);
- src = src_base;
- break;
- }
- *consumed = src - source;
- produced = dst - destination;
- break;
- }
+ while (1)
+ {
+ src_base = src;
+ ONE_MORE_BYTE (c);
+ if (c == '\r')
+ {
+ ONE_MORE_BYTE (c);
+ if (c != '\n')
+ {
+ if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
+ src--;
+ c = '\r';
+ }
+ }
+ else if (c == '\n'
+ && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL))
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
+ EMIT_CHAR (c);
+ }
+ break;
case CODING_EOL_CR:
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- bcopy (source, destination, produced);
- dst_end = destination + produced;
- while (dst < dst_end)
- if (*dst++ == '\r') dst[-1] = '\n';
- *consumed = produced;
+ while (1)
+ {
+ src_base = src;
+ ONE_MORE_BYTE (c);
+ if (c == '\n')
+ {
+ if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ {
+ coding->result = CODING_FINISH_INCONSISTENT_EOL;
+ goto label_end_of_loop;
+ }
+ }
+ else if (c == '\r')
+ c = '\n';
+ EMIT_CHAR (c);
+ }
break;
- default: /* i.e. case: CODING_EOL_LF */
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- bcopy (source, destination, produced);
- *consumed = produced;
- break;
+ default: /* no need for EOL handling */
+ while (1)
+ {
+ src_base = src;
+ ONE_MORE_BYTE (c);
+ EMIT_CHAR (c);
+ }
}
- return produced;
+ label_end_of_loop:
+ coding->consumed = coding->consumed_char = src_base - source;
+ coding->produced = dst - destination;
+ return;
}
/* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode
- format of end-of-line according to `coding->eol_type'. If
- `coding->selective' is 1, code '\r' in source text also means
- end-of-line. */
-
-encode_eol (coding, source, destination, src_bytes, dst_bytes, consumed)
+ format of end-of-line according to `coding->eol_type'. It also
+ convert multibyte form 8-bit characers to unibyte if
+ CODING->src_multibyte is nonzero. If `coding->mode &
+ CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text
+ also means end-of-line. */
+
+static void
+encode_eol (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
unsigned char *src = source;
unsigned char *dst = destination;
- int produced;
-
- if (src_bytes <= 0)
- return 0;
+ unsigned char *src_end = src + src_bytes;
+ unsigned char *dst_end = dst + dst_bytes;
+ Lisp_Object translation_table;
+ /* SRC_BASE remembers the start position in source in each loop.
+ The loop will be exited when there's not enough source text to
+ analyze multi-byte codes (within macro ONE_MORE_CHAR), or when
+ there's not enough destination area to produce encoded codes
+ (within macro EMIT_BYTES). */
+ unsigned char *src_base;
+ int c;
+ int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY;
+
+ translation_table = Qnil;
+ if (coding->src_multibyte
+ && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL)
+ {
+ src_end--;
+ src_bytes--;
+ coding->result = CODING_FINISH_INSUFFICIENT_SRC;
+ }
- switch (coding->eol_type)
+ if (coding->eol_type == CODING_EOL_CRLF)
{
- case CODING_EOL_LF:
- case CODING_EOL_UNDECIDED:
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- bcopy (source, destination, produced);
- if (coding->selective)
+ while (src < src_end)
{
- int i = produced;
- while (i--)
- if (*dst++ == '\r') dst[-1] = '\n';
+ src_base = src;
+ c = *src++;
+ if (c >= 0x20)
+ EMIT_ONE_BYTE (c);
+ else if (c == '\n' || (c == '\r' && selective_display))
+ EMIT_TWO_BYTES ('\r', '\n');
+ else
+ EMIT_ONE_BYTE (c);
+ }
+ src_base = src;
+ label_end_of_loop:
+ ;
+ }
+ else
+ {
+ if (src_bytes <= dst_bytes)
+ {
+ safe_bcopy (src, dst, src_bytes);
+ src_base = src_end;
+ dst += src_bytes;
+ }
+ else
+ {
+ if (coding->src_multibyte
+ && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL)
+ dst_bytes--;
+ safe_bcopy (src, dst, dst_bytes);
+ src_base = src + dst_bytes;
+ dst = destination + dst_bytes;
+ coding->result = CODING_FINISH_INSUFFICIENT_DST;
+ }
+ if (coding->eol_type == CODING_EOL_CR)
+ {
+ for (src = destination; src < dst; src++)
+ if (*src == '\n') *src = '\r';
+ }
+ else if (selective_display)
+ {
+ for (src = destination; src < dst; src++)
+ if (*src == '\r') *src = '\n';
}
- *consumed = produced;
-
- case CODING_EOL_CRLF:
- {
- unsigned char c;
- unsigned char *src_end = source + src_bytes;
- unsigned char *dst_end = destination + dst_bytes;
- /* Since the maximum bytes produced by each loop is 2, we
- subtract 1 from DST_END to assure overflow checking is
- necessary only at the head of loop. */
- unsigned char *adjusted_dst_end = dst_end - 1;
-
- while (src < src_end && dst < adjusted_dst_end)
- {
- c = *src++;
- if (c == '\n' || (c == '\r' && coding->selective))
- *dst++ = '\r', *dst++ = '\n';
- else
- *dst++ = c;
- }
- produced = dst - destination;
- *consumed = src - source;
- break;
- }
-
- default: /* i.e. case CODING_EOL_CR: */
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- bcopy (source, destination, produced);
- {
- int i = produced;
- while (i--)
- if (*dst++ == '\n') dst[-1] = '\r';
- }
- *consumed = produced;
}
+ if (coding->src_multibyte)
+ dst = destination + str_as_unibyte (destination, dst - destination);
- return produced;
+ coding->consumed = src_base - source;
+ coding->produced = dst - destination;
}
\f
-/*** 6. C library functions ***/
+/*** 7. C library functions ***/
/* In Emacs Lisp, coding system is represented by a Lisp symbol which
has a property `coding-system'. The value of this property is a
Lisp_Object coding_system;
struct coding_system *coding;
{
- Lisp_Object coding_spec, plist, type, eol_type;
+ Lisp_Object coding_spec, coding_type, eol_type, plist;
Lisp_Object val;
int i;
- /* At first, set several fields to default values. */
- coding->require_flushing = 0;
- coding->last_block = 0;
- coding->selective = 0;
- coding->composing = 0;
- coding->direction = 0;
- coding->carryover_size = 0;
+ /* Initialize some fields required for all kinds of coding systems. */
+ coding->symbol = coding_system;
+ coding->common_flags = 0;
+ coding->mode = 0;
+ coding->heading_ascii = -1;
coding->post_read_conversion = coding->pre_write_conversion = Qnil;
- coding->character_unification_table_for_decode = Qnil;
- coding->character_unification_table_for_encode = Qnil;
+ coding->composing = COMPOSITION_DISABLED;
+ coding->cmp_data = NULL;
- Vlast_coding_system_used = coding->symbol = coding_system;
- eol_type = Qnil;
+ if (NILP (coding_system))
+ goto label_invalid_coding_system;
- /* Get values of property `coding-system' and `eol-type'.
- Also get values of coding system properties:
- `post-read-conversion', `pre-write-conversion',
- `character-unification-table-for-decode',
- `character-unification-table-for-encode'. */
coding_spec = Fget (coding_system, Qcoding_system);
+
if (!VECTORP (coding_spec)
|| XVECTOR (coding_spec)->size != 5
|| !CONSP (XVECTOR (coding_spec)->contents[3]))
goto label_invalid_coding_system;
- if (!inhibit_eol_conversion)
- eol_type = Fget (coding_system, Qeol_type);
+ eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type);
+ if (VECTORP (eol_type))
+ {
+ coding->eol_type = CODING_EOL_UNDECIDED;
+ coding->common_flags = CODING_REQUIRE_DETECTION_MASK;
+ }
+ else if (XFASTINT (eol_type) == 1)
+ {
+ coding->eol_type = CODING_EOL_CRLF;
+ coding->common_flags
+ = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
+ }
+ else if (XFASTINT (eol_type) == 2)
+ {
+ coding->eol_type = CODING_EOL_CR;
+ coding->common_flags
+ = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
+ }
+ else
+ coding->eol_type = CODING_EOL_LF;
+
+ coding_type = XVECTOR (coding_spec)->contents[0];
+ /* Try short cut. */
+ if (SYMBOLP (coding_type))
+ {
+ if (EQ (coding_type, Qt))
+ {
+ coding->type = coding_type_undecided;
+ coding->common_flags |= CODING_REQUIRE_DETECTION_MASK;
+ }
+ else
+ coding->type = coding_type_no_conversion;
+ return 0;
+ }
+
+ /* Get values of coding system properties:
+ `post-read-conversion', `pre-write-conversion',
+ `translation-table-for-decode', `translation-table-for-encode'. */
plist = XVECTOR (coding_spec)->contents[3];
- coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion);
- coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion);
- val = Fplist_get (plist, Qcharacter_unification_table_for_decode);
+ /* Pre & post conversion functions should be disabled if
+ inhibit_eol_conversion is nozero. This is the case that a code
+ conversion function is called while those functions are running. */
+ if (! inhibit_pre_post_conversion)
+ {
+ coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion);
+ coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion);
+ }
+ val = Fplist_get (plist, Qtranslation_table_for_decode);
if (SYMBOLP (val))
- val = Fget (val, Qcharacter_unification_table_for_decode);
- coding->character_unification_table_for_decode
- = CHAR_TABLE_P (val) ? val : Qnil;
- val = Fplist_get (plist, Qcharacter_unification_table_for_encode);
+ val = Fget (val, Qtranslation_table_for_decode);
+ coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil;
+ val = Fplist_get (plist, Qtranslation_table_for_encode);
if (SYMBOLP (val))
- val = Fget (val, Qcharacter_unification_table_for_encode);
- coding->character_unification_table_for_encode
- = CHAR_TABLE_P (val) ? val : Qnil;
+ val = Fget (val, Qtranslation_table_for_encode);
+ coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil;
+ val = Fplist_get (plist, Qcoding_category);
+ if (!NILP (val))
+ {
+ val = Fget (val, Qcoding_category_index);
+ if (INTEGERP (val))
+ coding->category_idx = XINT (val);
+ else
+ goto label_invalid_coding_system;
+ }
+ else
+ goto label_invalid_coding_system;
val = Fplist_get (plist, Qsafe_charsets);
if (EQ (val, Qt))
bzero (coding->safe_charsets, MAX_CHARSET + 1);
while (CONSP (val))
{
- if ((i = get_charset_id (XCONS (val)->car)) >= 0)
+ if ((i = get_charset_id (XCAR (val))) >= 0)
coding->safe_charsets[i] = 1;
- val = XCONS (val)->cdr;
+ val = XCDR (val);
}
}
- if (VECTORP (eol_type))
- coding->eol_type = CODING_EOL_UNDECIDED;
- else if (XFASTINT (eol_type) == 1)
- coding->eol_type = CODING_EOL_CRLF;
- else if (XFASTINT (eol_type) == 2)
- coding->eol_type = CODING_EOL_CR;
- else
- coding->eol_type = CODING_EOL_LF;
+ /* If the coding system has non-nil `composition' property, enable
+ composition handling. */
+ val = Fplist_get (plist, Qcomposition);
+ if (!NILP (val))
+ coding->composing = COMPOSITION_NO;
- type = XVECTOR (coding_spec)->contents[0];
- switch (XFASTINT (type))
+ switch (XFASTINT (coding_type))
{
case 0:
coding->type = coding_type_emacs_mule;
+ if (!NILP (coding->post_read_conversion))
+ coding->common_flags |= CODING_REQUIRE_DECODING_MASK;
+ if (!NILP (coding->pre_write_conversion))
+ coding->common_flags |= CODING_REQUIRE_ENCODING_MASK;
break;
case 1:
coding->type = coding_type_sjis;
+ coding->common_flags
+ |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
break;
case 2:
coding->type = coding_type_iso2022;
+ coding->common_flags
+ |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
{
Lisp_Object val, temp;
Lisp_Object *flags;
- int i, charset, default_reg_bits = 0;
+ int i, charset, reg_bits = 0;
val = XVECTOR (coding_spec)->contents[4];
val = Vcharset_revision_alist;
while (CONSP (val))
{
- charset = get_charset_id (Fcar_safe (XCONS (val)->car));
+ charset = get_charset_id (Fcar_safe (XCAR (val)));
if (charset >= 0
- && (temp = Fcdr_safe (XCONS (val)->car), INTEGERP (temp))
+ && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp))
&& (i = XINT (temp), (i >= 0 && (i + '@') < 128)))
CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i;
- val = XCONS (val)->cdr;
+ val = XCDR (val);
}
/* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations.
list of integer, nil, or t: designate the first
element (if integer) to REG initially, the remaining
elements (if integer) is designated to REG on request,
- if an element is t, REG can be used by any charset,
+ if an element is t, REG can be used by any charsets,
nil: REG is never used. */
for (charset = 0; charset <= MAX_CHARSET; charset++)
CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
else if (EQ (flags[i], Qt))
{
CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1;
- default_reg_bits |= 1 << i;
+ reg_bits |= 1 << i;
+ coding->flags |= CODING_FLAG_ISO_DESIGNATION;
}
else if (CONSP (flags[i]))
{
- Lisp_Object tail = flags[i];
+ Lisp_Object tail;
+ tail = flags[i];
- if (INTEGERP (XCONS (tail)->car)
- && (charset = XINT (XCONS (tail)->car),
+ coding->flags |= CODING_FLAG_ISO_DESIGNATION;
+ if (INTEGERP (XCAR (tail))
+ && (charset = XINT (XCAR (tail)),
CHARSET_VALID_P (charset))
- || (charset = get_charset_id (XCONS (tail)->car)) >= 0)
+ || (charset = get_charset_id (XCAR (tail))) >= 0)
{
CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset;
CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i;
}
else
CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1;
- tail = XCONS (tail)->cdr;
+ tail = XCDR (tail);
while (CONSP (tail))
{
- if (INTEGERP (XCONS (tail)->car)
- && (charset = XINT (XCONS (tail)->car),
+ if (INTEGERP (XCAR (tail))
+ && (charset = XINT (XCAR (tail)),
CHARSET_VALID_P (charset))
- || (charset = get_charset_id (XCONS (tail)->car)) >= 0)
+ || (charset = get_charset_id (XCAR (tail))) >= 0)
CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
= i;
- else if (EQ (XCONS (tail)->car, Qt))
- default_reg_bits |= 1 << i;
- tail = XCONS (tail)->cdr;
+ else if (EQ (XCAR (tail), Qt))
+ reg_bits |= 1 << i;
+ tail = XCDR (tail);
}
}
else
= CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i);
}
- if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT))
+ if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT))
{
/* REG 1 can be used only by locking shift in 7-bit env. */
if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS)
- default_reg_bits &= ~2;
+ reg_bits &= ~2;
if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT))
/* Without any shifting, only REG 0 and 1 can be used. */
- default_reg_bits &= 3;
+ reg_bits &= 3;
}
- for (charset = 0; charset <= MAX_CHARSET; charset++)
- if (CHARSET_VALID_P (charset)
- && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
- == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION))
+ if (reg_bits)
+ for (charset = 0; charset <= MAX_CHARSET; charset++)
{
- /* We have not yet decided where to designate CHARSET. */
- int reg_bits = default_reg_bits;
-
- if (CHARSET_CHARS (charset) == 96)
- /* A charset of CHARS96 can't be designated to REG 0. */
- reg_bits &= ~1;
-
- if (reg_bits)
- /* There exist some default graphic register. */
- CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
- = (reg_bits & 1
- ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3)));
- else
- /* We anyway have to designate CHARSET to somewhere. */
- CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
- = (CHARSET_CHARS (charset) == 94
- ? 0
- : ((coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT
- || ! coding->flags & CODING_FLAG_ISO_SEVEN_BITS)
- ? 1
- : (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT
- ? 2 : 0)));
+ if (CHARSET_VALID_P (charset))
+ {
+ /* There exist some default graphic registers to be
+ used CHARSET. */
+
+ /* We had better avoid designating a charset of
+ CHARS96 to REG 0 as far as possible. */
+ if (CHARSET_CHARS (charset) == 96)
+ CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
+ = (reg_bits & 2
+ ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0)));
+ else
+ CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
+ = (reg_bits & 1
+ ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3)));
+ }
}
}
- coding->require_flushing = 1;
+ coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK;
+ coding->spec.iso2022.last_invalid_designation_register = -1;
break;
case 3:
coding->type = coding_type_big5;
+ coding->common_flags
+ |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
coding->flags
= (NILP (XVECTOR (coding_spec)->contents[4])
? CODING_FLAG_BIG5_HKU
case 4:
coding->type = coding_type_ccl;
+ coding->common_flags
+ |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK;
{
- Lisp_Object val = XVECTOR (coding_spec)->contents[4];
- if (CONSP (val)
- && VECTORP (XCONS (val)->car)
- && VECTORP (XCONS (val)->cdr))
+ val = XVECTOR (coding_spec)->contents[4];
+ if (! CONSP (val)
+ || setup_ccl_program (&(coding->spec.ccl.decoder),
+ XCAR (val)) < 0
+ || setup_ccl_program (&(coding->spec.ccl.encoder),
+ XCDR (val)) < 0)
+ goto label_invalid_coding_system;
+
+ bzero (coding->spec.ccl.valid_codes, 256);
+ val = Fplist_get (plist, Qvalid_codes);
+ if (CONSP (val))
{
- setup_ccl_program (&(coding->spec.ccl.decoder), XCONS (val)->car);
- setup_ccl_program (&(coding->spec.ccl.encoder), XCONS (val)->cdr);
+ Lisp_Object this;
+
+ for (; CONSP (val); val = XCDR (val))
+ {
+ this = XCAR (val);
+ if (INTEGERP (this)
+ && XINT (this) >= 0 && XINT (this) < 256)
+ coding->spec.ccl.valid_codes[XINT (this)] = 1;
+ else if (CONSP (this)
+ && INTEGERP (XCAR (this))
+ && INTEGERP (XCDR (this)))
+ {
+ int start = XINT (XCAR (this));
+ int end = XINT (XCDR (this));
+
+ if (start >= 0 && start <= end && end < 256)
+ while (start <= end)
+ coding->spec.ccl.valid_codes[start++] = 1;
+ }
+ }
}
- else
- goto label_invalid_coding_system;
}
- coding->require_flushing = 1;
+ coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK;
+ coding->spec.ccl.cr_carryover = 0;
break;
case 5:
break;
default:
- if (EQ (type, Qt))
- coding->type = coding_type_undecided;
- else
- coding->type = coding_type_no_conversion;
- break;
+ goto label_invalid_coding_system;
}
return 0;
label_invalid_coding_system:
coding->type = coding_type_no_conversion;
+ coding->category_idx = CODING_CATEGORY_IDX_BINARY;
+ coding->common_flags = 0;
coding->eol_type = CODING_EOL_LF;
- coding->symbol = coding->pre_write_conversion = coding->post_read_conversion
- = Qnil;
+ coding->pre_write_conversion = coding->post_read_conversion = Qnil;
return -1;
}
+/* Free memory blocks allocated for storing composition information. */
+
+void
+coding_free_composition_data (coding)
+ struct coding_system *coding;
+{
+ struct composition_data *cmp_data = coding->cmp_data, *next;
+
+ if (!cmp_data)
+ return;
+ /* Memory blocks are chained. At first, rewind to the first, then,
+ free blocks one by one. */
+ while (cmp_data->prev)
+ cmp_data = cmp_data->prev;
+ while (cmp_data)
+ {
+ next = cmp_data->next;
+ xfree (cmp_data);
+ cmp_data = next;
+ }
+ coding->cmp_data = NULL;
+}
+
+/* Set `char_offset' member of all memory blocks pointed by
+ coding->cmp_data to POS. */
+
+void
+coding_adjust_composition_offset (coding, pos)
+ struct coding_system *coding;
+ int pos;
+{
+ struct composition_data *cmp_data;
+
+ for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next)
+ cmp_data->char_offset = pos;
+}
+
+/* Setup raw-text or one of its subsidiaries in the structure
+ coding_system CODING according to the already setup value eol_type
+ in CODING. CODING should be setup for some coding system in
+ advance. */
+
+void
+setup_raw_text_coding_system (coding)
+ struct coding_system *coding;
+{
+ if (coding->type != coding_type_raw_text)
+ {
+ coding->symbol = Qraw_text;
+ coding->type = coding_type_raw_text;
+ if (coding->eol_type != CODING_EOL_UNDECIDED)
+ {
+ Lisp_Object subsidiaries;
+ subsidiaries = Fget (Qraw_text, Qeol_type);
+
+ if (VECTORP (subsidiaries)
+ && XVECTOR (subsidiaries)->size == 3)
+ coding->symbol
+ = XVECTOR (subsidiaries)->contents[coding->eol_type];
+ }
+ setup_coding_system (coding->symbol, coding);
+ }
+ return;
+}
+
/* Emacs has a mechanism to automatically detect a coding system if it
is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But,
it's impossible to distinguish some coding systems accurately
The category for a coding system which has the same code range
as ISO2022 of 7-bit environment. This doesn't use any locking
- shift and single shift functions. Assigned the coding-system
- (Lisp symbol) `iso-2022-7bit' by default.
+ shift and single shift functions. This can encode/decode all
+ charsets. Assigned the coding-system (Lisp symbol)
+ `iso-2022-7bit' by default.
+
+ o coding-category-iso-7-tight
+
+ Same as coding-category-iso-7 except that this can
+ encode/decode only the specified charsets.
o coding-category-iso-8-1
as BIG5. Assigned the coding-system (Lisp symbol)
`cn-big5' by default.
+ o coding-category-utf-8
+
+ The category for a coding system which has the same code range
+ as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp
+ symbol) `utf-8' by default.
+
+ o coding-category-utf-16-be
+
+ The category for a coding system in which a text has an
+ Unicode signature (cf. Unicode Standard) in the order of BIG
+ endian at the head. Assigned the coding-system (Lisp symbol)
+ `utf-16-be' by default.
+
+ o coding-category-utf-16-le
+
+ The category for a coding system in which a text has an
+ Unicode signature (cf. Unicode Standard) in the order of
+ LITTLE endian at the head. Assigned the coding-system (Lisp
+ symbol) `utf-16-le' by default.
+
+ o coding-category-ccl
+
+ The category for a coding system of which encoder/decoder is
+ written in CCL programs. The default value is nil, i.e., no
+ coding system is assigned.
+
o coding-category-binary
The category for a coding system not categorized in any of the
*/
-/* Detect how a text of length SRC_BYTES pointed by SRC is encoded.
+static
+int ascii_skip_code[256];
+
+/* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded.
If it detects possible coding systems, return an integer in which
appropriate flag bits are set. Flag bits are defined by macros
- CODING_CATEGORY_MASK_XXX in `coding.h'. */
+ CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL,
+ it should point the table `coding_priorities'. In that case, only
+ the flag bit for a coding system of the highest priority is set in
+ the returned value.
-int
-detect_coding_mask (src, src_bytes)
- unsigned char *src;
- int src_bytes;
+ How many ASCII characters are at the head is returned as *SKIP. */
+
+static int
+detect_coding_mask (source, src_bytes, priorities, skip)
+ unsigned char *source;
+ int src_bytes, *priorities, *skip;
{
register unsigned char c;
- unsigned char *src_end = src + src_bytes;
- int mask;
+ unsigned char *src = source, *src_end = source + src_bytes;
+ unsigned int mask, utf16_examined_p, iso2022_examined_p;
+ int i, idx;
/* At first, skip all ASCII characters and control characters except
for three ISO2022 specific control characters. */
+ ascii_skip_code[ISO_CODE_SO] = 0;
+ ascii_skip_code[ISO_CODE_SI] = 0;
+ ascii_skip_code[ISO_CODE_ESC] = 0;
+
label_loop_detect_coding:
- while (src < src_end)
- {
- c = *src;
- if (c >= 0x80
- || (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO))
- break;
- src++;
- }
+ while (src < src_end && ascii_skip_code[*src]) src++;
+ *skip = src - source;
if (src >= src_end)
/* We found nothing other than ASCII. There's nothing to do. */
- return CODING_CATEGORY_MASK_ANY;
+ return 0;
+ c = *src;
/* The text seems to be encoded in some multilingual coding system.
Now, try to find in which coding system the text is encoded. */
if (c < 0x80)
/* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */
/* C is an ISO2022 specific control code of C0. */
mask = detect_coding_iso2022 (src, src_end);
- src++;
if (mask == 0)
- /* No valid ISO2022 code follows C. Try again. */
- goto label_loop_detect_coding;
- mask |= CODING_CATEGORY_MASK_RAW_TEXT;
+ {
+ /* No valid ISO2022 code follows C. Try again. */
+ src++;
+ if (c == ISO_CODE_ESC)
+ ascii_skip_code[ISO_CODE_ESC] = 1;
+ else
+ ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1;
+ goto label_loop_detect_coding;
+ }
+ if (priorities)
+ {
+ for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++)
+ {
+ if (mask & priorities[i])
+ return priorities[i];
+ }
+ return CODING_CATEGORY_MASK_RAW_TEXT;
+ }
}
- else if (c < 0xA0)
+ else
{
- /* If C is a special latin extra code,
- or is an ISO2022 specific control code of C1 (SS2 or SS3),
- or is an ISO2022 control-sequence-introducer (CSI),
- we should also consider the possibility of ISO2022 codings. */
- if ((VECTORP (Vlatin_extra_code_table)
- && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c]))
- || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3)
- || (c == ISO_CODE_CSI
- && (src < src_end
- && (*src == ']'
- || (src + 1 < src_end
- && src[1] == ']'
- && (*src == '0' || *src == '1' || *src == '2'))))))
- mask = (detect_coding_iso2022 (src, src_end)
- | detect_coding_sjis (src, src_end)
- | detect_coding_emacs_mule (src, src_end)
- | CODING_CATEGORY_MASK_RAW_TEXT);
+ int try;
+ if (c < 0xA0)
+ {
+ /* C is the first byte of SJIS character code,
+ or a leading-code of Emacs' internal format (emacs-mule),
+ or the first byte of UTF-16. */
+ try = (CODING_CATEGORY_MASK_SJIS
+ | CODING_CATEGORY_MASK_EMACS_MULE
+ | CODING_CATEGORY_MASK_UTF_16_BE
+ | CODING_CATEGORY_MASK_UTF_16_LE);
+
+ /* Or, if C is a special latin extra code,
+ or is an ISO2022 specific control code of C1 (SS2 or SS3),
+ or is an ISO2022 control-sequence-introducer (CSI),
+ we should also consider the possibility of ISO2022 codings. */
+ if ((VECTORP (Vlatin_extra_code_table)
+ && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c]))
+ || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3)
+ || (c == ISO_CODE_CSI
+ && (src < src_end
+ && (*src == ']'
+ || ((*src == '0' || *src == '1' || *src == '2')
+ && src + 1 < src_end
+ && src[1] == ']')))))
+ try |= (CODING_CATEGORY_MASK_ISO_8_ELSE
+ | CODING_CATEGORY_MASK_ISO_8BIT);
+ }
else
- /* C is the first byte of SJIS character code,
- or a leading-code of Emacs' internal format (emacs-mule). */
- mask = (detect_coding_sjis (src, src_end)
- | detect_coding_emacs_mule (src, src_end)
- | CODING_CATEGORY_MASK_RAW_TEXT);
+ /* C is a character of ISO2022 in graphic plane right,
+ or a SJIS's 1-byte character code (i.e. JISX0201),
+ or the first byte of BIG5's 2-byte code,
+ or the first byte of UTF-8/16. */
+ try = (CODING_CATEGORY_MASK_ISO_8_ELSE
+ | CODING_CATEGORY_MASK_ISO_8BIT
+ | CODING_CATEGORY_MASK_SJIS
+ | CODING_CATEGORY_MASK_BIG5
+ | CODING_CATEGORY_MASK_UTF_8
+ | CODING_CATEGORY_MASK_UTF_16_BE
+ | CODING_CATEGORY_MASK_UTF_16_LE);
+
+ /* Or, we may have to consider the possibility of CCL. */
+ if (coding_system_table[CODING_CATEGORY_IDX_CCL]
+ && (coding_system_table[CODING_CATEGORY_IDX_CCL]
+ ->spec.ccl.valid_codes)[c])
+ try |= CODING_CATEGORY_MASK_CCL;
+
+ mask = 0;
+ utf16_examined_p = iso2022_examined_p = 0;
+ if (priorities)
+ {
+ for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++)
+ {
+ if (!iso2022_examined_p
+ && (priorities[i] & try & CODING_CATEGORY_MASK_ISO))
+ {
+ mask |= detect_coding_iso2022 (src, src_end);
+ iso2022_examined_p = 1;
+ }
+ else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS)
+ mask |= detect_coding_sjis (src, src_end);
+ else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8)
+ mask |= detect_coding_utf_8 (src, src_end);
+ else if (!utf16_examined_p
+ && (priorities[i] & try &
+ CODING_CATEGORY_MASK_UTF_16_BE_LE))
+ {
+ mask |= detect_coding_utf_16 (src, src_end);
+ utf16_examined_p = 1;
+ }
+ else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5)
+ mask |= detect_coding_big5 (src, src_end);
+ else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE)
+ mask |= detect_coding_emacs_mule (src, src_end);
+ else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL)
+ mask |= detect_coding_ccl (src, src_end);
+ else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT)
+ mask |= CODING_CATEGORY_MASK_RAW_TEXT;
+ else if (priorities[i] & CODING_CATEGORY_MASK_BINARY)
+ mask |= CODING_CATEGORY_MASK_BINARY;
+ if (mask & priorities[i])
+ return priorities[i];
+ }
+ return CODING_CATEGORY_MASK_RAW_TEXT;
+ }
+ if (try & CODING_CATEGORY_MASK_ISO)
+ mask |= detect_coding_iso2022 (src, src_end);
+ if (try & CODING_CATEGORY_MASK_SJIS)
+ mask |= detect_coding_sjis (src, src_end);
+ if (try & CODING_CATEGORY_MASK_BIG5)
+ mask |= detect_coding_big5 (src, src_end);
+ if (try & CODING_CATEGORY_MASK_UTF_8)
+ mask |= detect_coding_utf_8 (src, src_end);
+ if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE)
+ mask |= detect_coding_utf_16 (src, src_end);
+ if (try & CODING_CATEGORY_MASK_EMACS_MULE)
+ mask |= detect_coding_emacs_mule (src, src_end);
+ if (try & CODING_CATEGORY_MASK_CCL)
+ mask |= detect_coding_ccl (src, src_end);
}
- else
- /* C is a character of ISO2022 in graphic plane right,
- or a SJIS's 1-byte character code (i.e. JISX0201),
- or the first byte of BIG5's 2-byte code. */
- mask = (detect_coding_iso2022 (src, src_end)
- | detect_coding_sjis (src, src_end)
- | detect_coding_big5 (src, src_end)
- | CODING_CATEGORY_MASK_RAW_TEXT);
-
- return mask;
+ return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY);
}
/* Detect how a text of length SRC_BYTES pointed by SRC is encoded.
unsigned char *src;
int src_bytes;
{
- int mask = detect_coding_mask (src, src_bytes);
- int idx;
- Lisp_Object val = Vcoding_category_list;
+ unsigned int idx;
+ int skip, mask, i;
+ Lisp_Object val;
- if (mask == CODING_CATEGORY_MASK_ANY)
- /* We found nothing other than ASCII. There's nothing to do. */
- return;
+ val = Vcoding_category_list;
+ mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip);
+ coding->heading_ascii = skip;
- /* We found some plausible coding systems. Let's use a coding
- system of the highest priority. */
+ if (!mask) return;
- if (CONSP (val))
- while (!NILP (val))
- {
- idx = XFASTINT (Fget (XCONS (val)->car, Qcoding_category_index));
- if ((idx < CODING_CATEGORY_IDX_MAX) && (mask & (1 << idx)))
- break;
- val = XCONS (val)->cdr;
- }
- else
- val = Qnil;
+ /* We found a single coding system of the highest priority in MASK. */
+ idx = 0;
+ while (mask && ! (mask & 1)) mask >>= 1, idx++;
+ if (! mask)
+ idx = CODING_CATEGORY_IDX_RAW_TEXT;
- if (NILP (val))
+ val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[idx])->value;
+
+ if (coding->eol_type != CODING_EOL_UNDECIDED)
{
- /* For unknown reason, `Vcoding_category_list' contains none of
- found categories. Let's use any of them. */
- for (idx = 0; idx < CODING_CATEGORY_IDX_MAX; idx++)
- if (mask & (1 << idx))
- break;
+ Lisp_Object tmp;
+
+ tmp = Fget (val, Qeol_type);
+ if (VECTORP (tmp))
+ val = XVECTOR (tmp)->contents[coding->eol_type];
}
- setup_coding_system (XSYMBOL (coding_category_table[idx])->value, coding);
+
+ /* Setup this new coding system while preserving some slots. */
+ {
+ int src_multibyte = coding->src_multibyte;
+ int dst_multibyte = coding->dst_multibyte;
+
+ setup_coding_system (val, coding);
+ coding->src_multibyte = src_multibyte;
+ coding->dst_multibyte = dst_multibyte;
+ coding->heading_ascii = skip;
+ }
}
-/* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC
- is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF,
- CODING_EOL_CR, and CODING_EOL_UNDECIDED. */
+/* Detect how end-of-line of a text of length SRC_BYTES pointed by
+ SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF,
+ CODING_EOL_CR, and CODING_EOL_UNDECIDED.
+
+ How many non-eol characters are at the head is returned as *SKIP. */
#define MAX_EOL_CHECK_COUNT 3
-int
-detect_eol_type (src, src_bytes)
- unsigned char *src;
- int src_bytes;
+static int
+detect_eol_type (source, src_bytes, skip)
+ unsigned char *source;
+ int src_bytes, *skip;
{
- unsigned char *src_end = src + src_bytes;
+ unsigned char *src = source, *src_end = src + src_bytes;
unsigned char c;
int total = 0; /* How many end-of-lines are found so far. */
int eol_type = CODING_EOL_UNDECIDED;
int this_eol_type;
+ *skip = 0;
+
while (src < src_end && total < MAX_EOL_CHECK_COUNT)
{
c = *src++;
if (c == '\n' || c == '\r')
{
+ if (*skip == 0)
+ *skip = src - 1 - source;
total++;
if (c == '\n')
this_eol_type = CODING_EOL_LF;
/* This is the first end-of-line. */
eol_type = this_eol_type;
else if (eol_type != this_eol_type)
- /* The found type is different from what found before.
- Let's notice the caller about this inconsistency. */
- return CODING_EOL_INCONSISTENT;
+ {
+ /* The found type is different from what found before. */
+ eol_type = CODING_EOL_INCONSISTENT;
+ break;
+ }
}
}
+ if (*skip == 0)
+ *skip = src_end - source;
return eol_type;
}
-/* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC
- is encoded. If it detects an appropriate format of end-of-line, it
- sets the information in *CODING. */
+/* Like detect_eol_type, but detect EOL type in 2-octet
+ big-endian/little-endian format for coding systems utf-16-be and
+ utf-16-le. */
-void
-detect_eol (coding, src, src_bytes)
- struct coding_system *coding;
- unsigned char *src;
- int src_bytes;
+static int
+detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p)
+ unsigned char *source;
+ int src_bytes, *skip;
{
- Lisp_Object val;
- int eol_type = detect_eol_type (src, src_bytes);
+ unsigned char *src = source, *src_end = src + src_bytes;
+ unsigned int c1, c2;
+ int total = 0; /* How many end-of-lines are found so far. */
+ int eol_type = CODING_EOL_UNDECIDED;
+ int this_eol_type;
+ int msb, lsb;
- if (eol_type == CODING_EOL_UNDECIDED)
- /* We found no end-of-line in the source text. */
- return;
+ if (big_endian_p)
+ msb = 0, lsb = 1;
+ else
+ msb = 1, lsb = 0;
- if (eol_type == CODING_EOL_INCONSISTENT)
+ *skip = 0;
+
+ while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT)
{
-#if 0
- /* This code is suppressed until we find a better way to
- distinguish raw text file and binary file. */
+ c1 = (src[msb] << 8) | (src[lsb]);
+ src += 2;
- /* If we have already detected that the coding is raw-text, the
- coding should actually be no-conversion. */
- if (coding->type == coding_type_raw_text)
+ if (c1 == '\n' || c1 == '\r')
{
- setup_coding_system (Qno_conversion, coding);
- return;
- }
- /* Else, let's decode only text code anyway. */
-#endif /* 0 */
- eol_type = CODING_EOL_LF;
- }
-
- val = Fget (coding->symbol, Qeol_type);
- if (VECTORP (val) && XVECTOR (val)->size == 3)
- setup_coding_system (XVECTOR (val)->contents[eol_type], coding);
+ if (*skip == 0)
+ *skip = src - 2 - source;
+ total++;
+ if (c1 == '\n')
+ {
+ this_eol_type = CODING_EOL_LF;
+ }
+ else
+ {
+ if ((src + 1) >= src_end)
+ {
+ this_eol_type = CODING_EOL_CR;
+ }
+ else
+ {
+ c2 = (src[msb] << 8) | (src[lsb]);
+ if (c2 == '\n')
+ this_eol_type = CODING_EOL_CRLF, src += 2;
+ else
+ this_eol_type = CODING_EOL_CR;
+ }
+ }
+
+ if (eol_type == CODING_EOL_UNDECIDED)
+ /* This is the first end-of-line. */
+ eol_type = this_eol_type;
+ else if (eol_type != this_eol_type)
+ {
+ /* The found type is different from what found before. */
+ eol_type = CODING_EOL_INCONSISTENT;
+ break;
+ }
+ }
+ }
+
+ if (*skip == 0)
+ *skip = src_end - source;
+ return eol_type;
}
-/* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before
- decoding, it may detect coding system and format of end-of-line if
- those are not yet decided. */
+/* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC
+ is encoded. If it detects an appropriate format of end-of-line, it
+ sets the information in *CODING. */
+
+void
+detect_eol (coding, src, src_bytes)
+ struct coding_system *coding;
+ unsigned char *src;
+ int src_bytes;
+{
+ Lisp_Object val;
+ int skip;
+ int eol_type;
+
+ switch (coding->category_idx)
+ {
+ case CODING_CATEGORY_IDX_UTF_16_BE:
+ eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1);
+ break;
+ case CODING_CATEGORY_IDX_UTF_16_LE:
+ eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0);
+ break;
+ default:
+ eol_type = detect_eol_type (src, src_bytes, &skip);
+ break;
+ }
+
+ if (coding->heading_ascii > skip)
+ coding->heading_ascii = skip;
+ else
+ skip = coding->heading_ascii;
+
+ if (eol_type == CODING_EOL_UNDECIDED)
+ return;
+ if (eol_type == CODING_EOL_INCONSISTENT)
+ {
+#if 0
+ /* This code is suppressed until we find a better way to
+ distinguish raw text file and binary file. */
+
+ /* If we have already detected that the coding is raw-text, the
+ coding should actually be no-conversion. */
+ if (coding->type == coding_type_raw_text)
+ {
+ setup_coding_system (Qno_conversion, coding);
+ return;
+ }
+ /* Else, let's decode only text code anyway. */
+#endif /* 0 */
+ eol_type = CODING_EOL_LF;
+ }
+
+ val = Fget (coding->symbol, Qeol_type);
+ if (VECTORP (val) && XVECTOR (val)->size == 3)
+ {
+ int src_multibyte = coding->src_multibyte;
+ int dst_multibyte = coding->dst_multibyte;
+
+ setup_coding_system (XVECTOR (val)->contents[eol_type], coding);
+ coding->src_multibyte = src_multibyte;
+ coding->dst_multibyte = dst_multibyte;
+ coding->heading_ascii = skip;
+ }
+}
+
+#define CONVERSION_BUFFER_EXTRA_ROOM 256
+
+#define DECODING_BUFFER_MAG(coding) \
+ (coding->type == coding_type_iso2022 \
+ ? 3 \
+ : (coding->type == coding_type_ccl \
+ ? coding->spec.ccl.decoder.buf_magnification \
+ : 2))
+
+/* Return maximum size (bytes) of a buffer enough for decoding
+ SRC_BYTES of text encoded in CODING. */
+
+int
+decoding_buffer_size (coding, src_bytes)
+ struct coding_system *coding;
+ int src_bytes;
+{
+ return (src_bytes * DECODING_BUFFER_MAG (coding)
+ + CONVERSION_BUFFER_EXTRA_ROOM);
+}
+
+/* Return maximum size (bytes) of a buffer enough for encoding
+ SRC_BYTES of text to CODING. */
+
+int
+encoding_buffer_size (coding, src_bytes)
+ struct coding_system *coding;
+ int src_bytes;
+{
+ int magnification;
+
+ if (coding->type == coding_type_ccl)
+ magnification = coding->spec.ccl.encoder.buf_magnification;
+ else if (CODING_REQUIRE_ENCODING (coding))
+ magnification = 3;
+ else
+ magnification = 1;
+
+ return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM);
+}
+
+#ifndef MINIMUM_CONVERSION_BUFFER_SIZE
+#define MINIMUM_CONVERSION_BUFFER_SIZE 1024
+#endif
+
+char *conversion_buffer;
+int conversion_buffer_size;
+
+/* Return a pointer to a SIZE bytes of buffer to be used for encoding
+ or decoding. Sufficient memory is allocated automatically. If we
+ run out of memory, return NULL. */
+
+char *
+get_conversion_buffer (size)
+ int size;
+{
+ if (size > conversion_buffer_size)
+ {
+ char *buf;
+ int real_size = conversion_buffer_size * 2;
+
+ while (real_size < size) real_size *= 2;
+ buf = (char *) xmalloc (real_size);
+ xfree (conversion_buffer);
+ conversion_buffer = buf;
+ conversion_buffer_size = real_size;
+ }
+ return conversion_buffer;
+}
int
-decode_coding (coding, source, destination, src_bytes, dst_bytes, consumed)
+ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep)
struct coding_system *coding;
unsigned char *source, *destination;
- int src_bytes, dst_bytes;
- int *consumed;
+ int src_bytes, dst_bytes, encodep;
{
- int produced;
+ struct ccl_program *ccl
+ = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder;
+ int result;
+
+ ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK;
+ if (encodep)
+ ccl->eol_type = coding->eol_type;
+ coding->produced = ccl_driver (ccl, source, destination,
+ src_bytes, dst_bytes, &(coding->consumed));
+ if (encodep)
+ coding->produced_char = coding->produced;
+ else
+ {
+ int bytes
+ = dst_bytes ? dst_bytes : source + coding->consumed - destination;
+ coding->produced = str_as_multibyte (destination, bytes,
+ coding->produced,
+ &(coding->produced_char));
+ }
- if (src_bytes <= 0)
+ switch (ccl->status)
{
- *consumed = 0;
- return 0;
+ case CCL_STAT_SUSPEND_BY_SRC:
+ result = CODING_FINISH_INSUFFICIENT_SRC;
+ break;
+ case CCL_STAT_SUSPEND_BY_DST:
+ result = CODING_FINISH_INSUFFICIENT_DST;
+ break;
+ case CCL_STAT_QUIT:
+ case CCL_STAT_INVALID_CMD:
+ result = CODING_FINISH_INTERRUPT;
+ break;
+ default:
+ result = CODING_FINISH_NORMAL;
+ break;
+ }
+ return result;
+}
+
+/* Decode EOL format of the text at PTR of BYTES length destructively
+ according to CODING->eol_type. This is called after the CCL
+ program produced a decoded text at PTR. If we do CRLF->LF
+ conversion, update CODING->produced and CODING->produced_char. */
+
+static void
+decode_eol_post_ccl (coding, ptr, bytes)
+ struct coding_system *coding;
+ unsigned char *ptr;
+ int bytes;
+{
+ Lisp_Object val, saved_coding_symbol;
+ unsigned char *pend = ptr + bytes;
+ int dummy;
+
+ /* Remember the current coding system symbol. We set it back when
+ an inconsistent EOL is found so that `last-coding-system-used' is
+ set to the coding system that doesn't specify EOL conversion. */
+ saved_coding_symbol = coding->symbol;
+
+ coding->spec.ccl.cr_carryover = 0;
+ if (coding->eol_type == CODING_EOL_UNDECIDED)
+ {
+ /* Here, to avoid the call of setup_coding_system, we directly
+ call detect_eol_type. */
+ coding->eol_type = detect_eol_type (ptr, bytes, &dummy);
+ if (coding->eol_type == CODING_EOL_INCONSISTENT)
+ coding->eol_type = CODING_EOL_LF;
+ if (coding->eol_type != CODING_EOL_UNDECIDED)
+ {
+ val = Fget (coding->symbol, Qeol_type);
+ if (VECTORP (val) && XVECTOR (val)->size == 3)
+ coding->symbol = XVECTOR (val)->contents[coding->eol_type];
+ }
+ coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL;
+ }
+
+ if (coding->eol_type == CODING_EOL_LF
+ || coding->eol_type == CODING_EOL_UNDECIDED)
+ {
+ /* We have nothing to do. */
+ ptr = pend;
+ }
+ else if (coding->eol_type == CODING_EOL_CRLF)
+ {
+ unsigned char *pstart = ptr, *p = ptr;
+
+ if (! (coding->mode & CODING_MODE_LAST_BLOCK)
+ && *(pend - 1) == '\r')
+ {
+ /* If the last character is CR, we can't handle it here
+ because LF will be in the not-yet-decoded source text.
+ Recorded that the CR is not yet processed. */
+ coding->spec.ccl.cr_carryover = 1;
+ coding->produced--;
+ coding->produced_char--;
+ pend--;
+ }
+ while (ptr < pend)
+ {
+ if (*ptr == '\r')
+ {
+ if (ptr + 1 < pend && *(ptr + 1) == '\n')
+ {
+ *p++ = '\n';
+ ptr += 2;
+ }
+ else
+ {
+ if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ goto undo_eol_conversion;
+ *p++ = *ptr++;
+ }
+ }
+ else if (*ptr == '\n'
+ && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ goto undo_eol_conversion;
+ else
+ *p++ = *ptr++;
+ continue;
+
+ undo_eol_conversion:
+ /* We have faced with inconsistent EOL format at PTR.
+ Convert all LFs before PTR back to CRLFs. */
+ for (p--, ptr--; p >= pstart; p--)
+ {
+ if (*p == '\n')
+ *ptr-- = '\n', *ptr-- = '\r';
+ else
+ *ptr-- = *p;
+ }
+ /* If carryover is recorded, cancel it because we don't
+ convert CRLF anymore. */
+ if (coding->spec.ccl.cr_carryover)
+ {
+ coding->spec.ccl.cr_carryover = 0;
+ coding->produced++;
+ coding->produced_char++;
+ pend++;
+ }
+ p = ptr = pend;
+ coding->eol_type = CODING_EOL_LF;
+ coding->symbol = saved_coding_symbol;
+ }
+ if (p < pend)
+ {
+ /* As each two-byte sequence CRLF was converted to LF, (PEND
+ - P) is the number of deleted characters. */
+ coding->produced -= pend - p;
+ coding->produced_char -= pend - p;
+ }
+ }
+ else /* i.e. coding->eol_type == CODING_EOL_CR */
+ {
+ unsigned char *p = ptr;
+
+ for (; ptr < pend; ptr++)
+ {
+ if (*ptr == '\r')
+ *ptr = '\n';
+ else if (*ptr == '\n'
+ && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)
+ {
+ for (; p < ptr; p++)
+ {
+ if (*p == '\n')
+ *p = '\r';
+ }
+ ptr = pend;
+ coding->eol_type = CODING_EOL_LF;
+ coding->symbol = saved_coding_symbol;
+ }
+ }
}
+}
+
+/* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before
+ decoding, it may detect coding system and format of end-of-line if
+ those are not yet decided. The source should be unibyte, the
+ result is multibyte if CODING->dst_multibyte is nonzero, else
+ unibyte. */
+int
+decode_coding (coding, source, destination, src_bytes, dst_bytes)
+ struct coding_system *coding;
+ unsigned char *source, *destination;
+ int src_bytes, dst_bytes;
+{
if (coding->type == coding_type_undecided)
detect_coding (coding, source, src_bytes);
- if (coding->eol_type == CODING_EOL_UNDECIDED)
+ if (coding->eol_type == CODING_EOL_UNDECIDED
+ && coding->type != coding_type_ccl)
detect_eol (coding, source, src_bytes);
- coding->carryover_size = 0;
+ coding->produced = coding->produced_char = 0;
+ coding->consumed = coding->consumed_char = 0;
+ coding->errors = 0;
+ coding->result = CODING_FINISH_NORMAL;
+
switch (coding->type)
{
- case coding_type_no_conversion:
- label_no_conversion:
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- bcopy (source, destination, produced);
- *consumed = produced;
- break;
-
- case coding_type_emacs_mule:
- case coding_type_undecided:
- case coding_type_raw_text:
- if (coding->eol_type == CODING_EOL_LF
- || coding->eol_type == CODING_EOL_UNDECIDED)
- goto label_no_conversion;
- produced = decode_eol (coding, source, destination,
- src_bytes, dst_bytes, consumed);
- break;
-
case coding_type_sjis:
- produced = decode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed,
- 1);
+ decode_coding_sjis_big5 (coding, source, destination,
+ src_bytes, dst_bytes, 1);
break;
case coding_type_iso2022:
- produced = decode_coding_iso2022 (coding, source, destination,
- src_bytes, dst_bytes, consumed);
+ decode_coding_iso2022 (coding, source, destination,
+ src_bytes, dst_bytes);
break;
case coding_type_big5:
- produced = decode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed,
- 0);
+ decode_coding_sjis_big5 (coding, source, destination,
+ src_bytes, dst_bytes, 0);
+ break;
+
+ case coding_type_emacs_mule:
+ decode_coding_emacs_mule (coding, source, destination,
+ src_bytes, dst_bytes);
break;
case coding_type_ccl:
- produced = ccl_driver (&coding->spec.ccl.decoder, source, destination,
- src_bytes, dst_bytes, consumed);
+ if (coding->spec.ccl.cr_carryover)
+ {
+ /* Set the CR which is not processed by the previous call of
+ decode_eol_post_ccl in DESTINATION. */
+ *destination = '\r';
+ coding->produced++;
+ coding->produced_char++;
+ dst_bytes--;
+ }
+ ccl_coding_driver (coding, source,
+ destination + coding->spec.ccl.cr_carryover,
+ src_bytes, dst_bytes, 0);
+ if (coding->eol_type != CODING_EOL_LF)
+ decode_eol_post_ccl (coding, destination, coding->produced);
break;
+
+ default:
+ decode_eol (coding, source, destination, src_bytes, dst_bytes);
+ }
+
+ if (coding->result == CODING_FINISH_INSUFFICIENT_SRC
+ && coding->consumed == src_bytes)
+ coding->result = CODING_FINISH_NORMAL;
+
+ if (coding->mode & CODING_MODE_LAST_BLOCK
+ && coding->result == CODING_FINISH_INSUFFICIENT_SRC)
+ {
+ unsigned char *src = source + coding->consumed;
+ unsigned char *dst = destination + coding->produced;
+
+ src_bytes -= coding->consumed;
+ coding->errors++;
+ if (COMPOSING_P (coding))
+ DECODE_COMPOSITION_END ('1');
+ while (src_bytes--)
+ {
+ int c = *src++;
+ dst += CHAR_STRING (c, dst);
+ coding->produced_char++;
+ }
+ coding->consumed = coding->consumed_char = src - source;
+ coding->produced = dst - destination;
+ }
+
+ if (!coding->dst_multibyte)
+ {
+ coding->produced = str_as_unibyte (destination, coding->produced);
+ coding->produced_char = coding->produced;
}
- return produced;
+ return coding->result;
}
-/* See "GENERAL NOTES about `encode_coding_XXX ()' functions". */
+/* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The
+ multibyteness of the source is CODING->src_multibyte, the
+ multibyteness of the result is always unibyte. */
int
-encode_coding (coding, source, destination, src_bytes, dst_bytes, consumed)
+encode_coding (coding, source, destination, src_bytes, dst_bytes)
struct coding_system *coding;
unsigned char *source, *destination;
int src_bytes, dst_bytes;
- int *consumed;
{
- int produced;
+ coding->produced = coding->produced_char = 0;
+ coding->consumed = coding->consumed_char = 0;
+ coding->errors = 0;
+ coding->result = CODING_FINISH_NORMAL;
switch (coding->type)
{
- case coding_type_no_conversion:
- label_no_conversion:
- produced = (src_bytes > dst_bytes) ? dst_bytes : src_bytes;
- if (produced > 0)
- {
- bcopy (source, destination, produced);
- if (coding->selective)
- {
- unsigned char *p = destination, *pend = destination + produced;
- while (p < pend)
- if (*p++ == '\015') p[-1] = '\n';
- }
- }
- *consumed = produced;
- break;
-
- case coding_type_emacs_mule:
- case coding_type_undecided:
- case coding_type_raw_text:
- if (coding->eol_type == CODING_EOL_LF
- || coding->eol_type == CODING_EOL_UNDECIDED)
- goto label_no_conversion;
- produced = encode_eol (coding, source, destination,
- src_bytes, dst_bytes, consumed);
- break;
-
case coding_type_sjis:
- produced = encode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed,
- 1);
+ encode_coding_sjis_big5 (coding, source, destination,
+ src_bytes, dst_bytes, 1);
break;
case coding_type_iso2022:
- produced = encode_coding_iso2022 (coding, source, destination,
- src_bytes, dst_bytes, consumed);
+ encode_coding_iso2022 (coding, source, destination,
+ src_bytes, dst_bytes);
break;
case coding_type_big5:
- produced = encode_coding_sjis_big5 (coding, source, destination,
- src_bytes, dst_bytes, consumed,
- 0);
+ encode_coding_sjis_big5 (coding, source, destination,
+ src_bytes, dst_bytes, 0);
+ break;
+
+ case coding_type_emacs_mule:
+ encode_coding_emacs_mule (coding, source, destination,
+ src_bytes, dst_bytes);
break;
case coding_type_ccl:
- produced = ccl_driver (&coding->spec.ccl.encoder, source, destination,
- src_bytes, dst_bytes, consumed);
+ ccl_coding_driver (coding, source, destination,
+ src_bytes, dst_bytes, 1);
break;
+
+ default:
+ encode_eol (coding, source, destination, src_bytes, dst_bytes);
+ }
+
+ if (coding->result == CODING_FINISH_INSUFFICIENT_SRC
+ && coding->consumed == src_bytes)
+ coding->result = CODING_FINISH_NORMAL;
+
+ if (coding->mode & CODING_MODE_LAST_BLOCK)
+ {
+ unsigned char *src = source + coding->consumed;
+ unsigned char *src_end = src + src_bytes;
+ unsigned char *dst = destination + coding->produced;
+
+ if (coding->type == coding_type_iso2022)
+ ENCODE_RESET_PLANE_AND_REGISTER;
+ if (COMPOSING_P (coding))
+ *dst++ = ISO_CODE_ESC, *dst++ = '1';
+ if (coding->consumed < src_bytes)
+ {
+ int len = src_bytes - coding->consumed;
+
+ BCOPY_SHORT (source + coding->consumed, dst, len);
+ if (coding->src_multibyte)
+ len = str_as_unibyte (dst, len);
+ dst += len;
+ coding->consumed = src_bytes;
+ }
+ coding->produced = coding->produced_char = dst - destination;
}
- return produced;
+ return coding->result;
}
-#define CONVERSION_BUFFER_EXTRA_ROOM 256
+/* Scan text in the region between *BEG and *END (byte positions),
+ skip characters which we don't have to decode by coding system
+ CODING at the head and tail, then set *BEG and *END to the region
+ of the text we actually have to convert. The caller should move
+ the gap out of the region in advance if the region is from a
+ buffer.
-/* Return maximum size (bytes) of a buffer enough for decoding
- SRC_BYTES of text encoded in CODING. */
+ If STR is not NULL, *BEG and *END are indices into STR. */
-int
-decoding_buffer_size (coding, src_bytes)
+static void
+shrink_decoding_region (beg, end, coding, str)
+ int *beg, *end;
struct coding_system *coding;
- int src_bytes;
+ unsigned char *str;
{
- int magnification;
-
- if (coding->type == coding_type_iso2022)
- magnification = 3;
- else if (coding->type == coding_type_ccl)
- magnification = coding->spec.ccl.decoder.buf_magnification;
- else
- magnification = 2;
+ unsigned char *begp_orig, *begp, *endp_orig, *endp, c;
+ int eol_conversion;
+ Lisp_Object translation_table;
+
+ if (coding->type == coding_type_ccl
+ || coding->type == coding_type_undecided
+ || coding->eol_type != CODING_EOL_LF
+ || !NILP (coding->post_read_conversion)
+ || coding->composing != COMPOSITION_DISABLED)
+ {
+ /* We can't skip any data. */
+ return;
+ }
+ if (coding->type == coding_type_no_conversion
+ || coding->type == coding_type_raw_text
+ || coding->type == coding_type_emacs_mule)
+ {
+ /* We need no conversion, but don't have to skip any data here.
+ Decoding routine handles them effectively anyway. */
+ return;
+ }
- return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM);
+ translation_table = coding->translation_table_for_decode;
+ if (NILP (translation_table) && !NILP (Venable_character_translation))
+ translation_table = Vstandard_translation_table_for_decode;
+ if (CHAR_TABLE_P (translation_table))
+ {
+ int i;
+ for (i = 0; i < 128; i++)
+ if (!NILP (CHAR_TABLE_REF (translation_table, i)))
+ break;
+ if (i < 128)
+ /* Some ASCII character should be translated. We give up
+ shrinking. */
+ return;
+ }
+
+ if (coding->heading_ascii >= 0)
+ /* Detection routine has already found how much we can skip at the
+ head. */
+ *beg += coding->heading_ascii;
+
+ if (str)
+ {
+ begp_orig = begp = str + *beg;
+ endp_orig = endp = str + *end;
+ }
+ else
+ {
+ begp_orig = begp = BYTE_POS_ADDR (*beg);
+ endp_orig = endp = begp + *end - *beg;
+ }
+
+ eol_conversion = (coding->eol_type == CODING_EOL_CR
+ || coding->eol_type == CODING_EOL_CRLF);
+
+ switch (coding->type)
+ {
+ case coding_type_sjis:
+ case coding_type_big5:
+ /* We can skip all ASCII characters at the head. */
+ if (coding->heading_ascii < 0)
+ {
+ if (eol_conversion)
+ while (begp < endp && *begp < 0x80 && *begp != '\r') begp++;
+ else
+ while (begp < endp && *begp < 0x80) begp++;
+ }
+ /* We can skip all ASCII characters at the tail except for the
+ second byte of SJIS or BIG5 code. */
+ if (eol_conversion)
+ while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--;
+ else
+ while (begp < endp && endp[-1] < 0x80) endp--;
+ /* Do not consider LF as ascii if preceded by CR, since that
+ confuses eol decoding. */
+ if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n')
+ endp++;
+ if (begp < endp && endp < endp_orig && endp[-1] >= 0x80)
+ endp++;
+ break;
+
+ case coding_type_iso2022:
+ if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII)
+ /* We can't skip any data. */
+ break;
+ if (coding->heading_ascii < 0)
+ {
+ /* We can skip all ASCII characters at the head except for a
+ few control codes. */
+ while (begp < endp && (c = *begp) < 0x80
+ && c != ISO_CODE_CR && c != ISO_CODE_SO
+ && c != ISO_CODE_SI && c != ISO_CODE_ESC
+ && (!eol_conversion || c != ISO_CODE_LF))
+ begp++;
+ }
+ switch (coding->category_idx)
+ {
+ case CODING_CATEGORY_IDX_ISO_8_1:
+ case CODING_CATEGORY_IDX_ISO_8_2:
+ /* We can skip all ASCII characters at the tail. */
+ if (eol_conversion)
+ while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--;
+ else
+ while (begp < endp && endp[-1] < 0x80) endp--;
+ /* Do not consider LF as ascii if preceded by CR, since that
+ confuses eol decoding. */
+ if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n')
+ endp++;
+ break;
+
+ case CODING_CATEGORY_IDX_ISO_7:
+ case CODING_CATEGORY_IDX_ISO_7_TIGHT:
+ {
+ /* We can skip all charactes at the tail except for 8-bit
+ codes and ESC and the following 2-byte at the tail. */
+ unsigned char *eight_bit = NULL;
+
+ if (eol_conversion)
+ while (begp < endp
+ && (c = endp[-1]) != ISO_CODE_ESC && c != '\r')
+ {
+ if (!eight_bit && c & 0x80) eight_bit = endp;
+ endp--;
+ }
+ else
+ while (begp < endp
+ && (c = endp[-1]) != ISO_CODE_ESC)
+ {
+ if (!eight_bit && c & 0x80) eight_bit = endp;
+ endp--;
+ }
+ /* Do not consider LF as ascii if preceded by CR, since that
+ confuses eol decoding. */
+ if (begp < endp && endp < endp_orig
+ && endp[-1] == '\r' && endp[0] == '\n')
+ endp++;
+ if (begp < endp && endp[-1] == ISO_CODE_ESC)
+ {
+ if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B')
+ /* This is an ASCII designation sequence. We can
+ surely skip the tail. But, if we have
+ encountered an 8-bit code, skip only the codes
+ after that. */
+ endp = eight_bit ? eight_bit : endp + 2;
+ else
+ /* Hmmm, we can't skip the tail. */
+ endp = endp_orig;
+ }
+ else if (eight_bit)
+ endp = eight_bit;
+ }
+ }
+ break;
+
+ default:
+ abort ();
+ }
+ *beg += begp - begp_orig;
+ *end += endp - endp_orig;
+ return;
}
-/* Return maximum size (bytes) of a buffer enough for encoding
- SRC_BYTES of text to CODING. */
+/* Like shrink_decoding_region but for encoding. */
+
+static void
+shrink_encoding_region (beg, end, coding, str)
+ int *beg, *end;
+ struct coding_system *coding;
+ unsigned char *str;
+{
+ unsigned char *begp_orig, *begp, *endp_orig, *endp;
+ int eol_conversion;
+ Lisp_Object translation_table;
+
+ if (coding->type == coding_type_ccl
+ || coding->eol_type == CODING_EOL_CRLF
+ || coding->eol_type == CODING_EOL_CR
+ || coding->cmp_data && coding->cmp_data->used > 0)
+ {
+ /* We can't skip any data. */
+ return;
+ }
+ if (coding->type == coding_type_no_conversion
+ || coding->type == coding_type_raw_text
+ || coding->type == coding_type_emacs_mule
+ || coding->type == coding_type_undecided)
+ {
+ /* We need no conversion, but don't have to skip any data here.
+ Encoding routine handles them effectively anyway. */
+ return;
+ }
+
+ translation_table = coding->translation_table_for_encode;
+ if (NILP (translation_table) && !NILP (Venable_character_translation))
+ translation_table = Vstandard_translation_table_for_encode;
+ if (CHAR_TABLE_P (translation_table))
+ {
+ int i;
+ for (i = 0; i < 128; i++)
+ if (!NILP (CHAR_TABLE_REF (translation_table, i)))
+ break;
+ if (i < 128)
+ /* Some ASCII character should be tranlsated. We give up
+ shrinking. */
+ return;
+ }
+
+ if (str)
+ {
+ begp_orig = begp = str + *beg;
+ endp_orig = endp = str + *end;
+ }
+ else
+ {
+ begp_orig = begp = BYTE_POS_ADDR (*beg);
+ endp_orig = endp = begp + *end - *beg;
+ }
+
+ eol_conversion = (coding->eol_type == CODING_EOL_CR
+ || coding->eol_type == CODING_EOL_CRLF);
+
+ /* Here, we don't have to check coding->pre_write_conversion because
+ the caller is expected to have handled it already. */
+ switch (coding->type)
+ {
+ case coding_type_iso2022:
+ if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII)
+ /* We can't skip any data. */
+ break;
+ if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL)
+ {
+ unsigned char *bol = begp;
+ while (begp < endp && *begp < 0x80)
+ {
+ begp++;
+ if (begp[-1] == '\n')
+ bol = begp;
+ }
+ begp = bol;
+ goto label_skip_tail;
+ }
+ /* fall down ... */
+
+ case coding_type_sjis:
+ case coding_type_big5:
+ /* We can skip all ASCII characters at the head and tail. */
+ if (eol_conversion)
+ while (begp < endp && *begp < 0x80 && *begp != '\n') begp++;
+ else
+ while (begp < endp && *begp < 0x80) begp++;
+ label_skip_tail:
+ if (eol_conversion)
+ while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--;
+ else
+ while (begp < endp && *(endp - 1) < 0x80) endp--;
+ break;
+
+ default:
+ abort ();
+ }
+
+ *beg += begp - begp_orig;
+ *end += endp - endp_orig;
+ return;
+}
+
+/* As shrinking conversion region requires some overhead, we don't try
+ shrinking if the length of conversion region is less than this
+ value. */
+static int shrink_conversion_region_threshhold = 1024;
+
+#define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \
+ do { \
+ if (*(end) - *(beg) > shrink_conversion_region_threshhold) \
+ { \
+ if (encodep) shrink_encoding_region (beg, end, coding, str); \
+ else shrink_decoding_region (beg, end, coding, str); \
+ } \
+ } while (0)
+
+static Lisp_Object
+code_convert_region_unwind (dummy)
+ Lisp_Object dummy;
+{
+ inhibit_pre_post_conversion = 0;
+ return Qnil;
+}
+
+/* Store information about all compositions in the range FROM and TO
+ of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a
+ buffer or a string, defaults to the current buffer. */
+
+void
+coding_save_composition (coding, from, to, obj)
+ struct coding_system *coding;
+ int from, to;
+ Lisp_Object obj;
+{
+ Lisp_Object prop;
+ int start, end;
+
+ if (coding->composing == COMPOSITION_DISABLED)
+ return;
+ if (!coding->cmp_data)
+ coding_allocate_composition_data (coding, from);
+ if (!find_composition (from, to, &start, &end, &prop, obj)
+ || end > to)
+ return;
+ if (start < from
+ && (!find_composition (end, to, &start, &end, &prop, obj)
+ || end > to))
+ return;
+ coding->composing = COMPOSITION_NO;
+ do
+ {
+ if (COMPOSITION_VALID_P (start, end, prop))
+ {
+ enum composition_method method = COMPOSITION_METHOD (prop);
+ if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH
+ >= COMPOSITION_DATA_SIZE)
+ coding_allocate_composition_data (coding, from);
+ /* For relative composition, we remember start and end
+ positions, for the other compositions, we also remember
+ components. */
+ CODING_ADD_COMPOSITION_START (coding, start - from, method);
+ if (method != COMPOSITION_RELATIVE)
+ {
+ /* We must store a*/
+ Lisp_Object val, ch;
+
+ val = COMPOSITION_COMPONENTS (prop);
+ if (CONSP (val))
+ while (CONSP (val))
+ {
+ ch = XCAR (val), val = XCDR (val);
+ CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch));
+ }
+ else if (VECTORP (val) || STRINGP (val))
+ {
+ int len = (VECTORP (val)
+ ? XVECTOR (val)->size : XSTRING (val)->size);
+ int i;
+ for (i = 0; i < len; i++)
+ {
+ ch = (STRINGP (val)
+ ? Faref (val, make_number (i))
+ : XVECTOR (val)->contents[i]);
+ CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch));
+ }
+ }
+ else /* INTEGERP (val) */
+ CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val));
+ }
+ CODING_ADD_COMPOSITION_END (coding, end - from);
+ }
+ start = end;
+ }
+ while (start < to
+ && find_composition (start, to, &start, &end, &prop, obj)
+ && end <= to);
+
+ /* Make coding->cmp_data point to the first memory block. */
+ while (coding->cmp_data->prev)
+ coding->cmp_data = coding->cmp_data->prev;
+ coding->cmp_data_start = 0;
+}
+
+/* Reflect the saved information about compositions to OBJ.
+ CODING->cmp_data points to a memory block for the informaiton. OBJ
+ is a buffer or a string, defaults to the current buffer. */
+
+void
+coding_restore_composition (coding, obj)
+ struct coding_system *coding;
+ Lisp_Object obj;
+{
+ struct composition_data *cmp_data = coding->cmp_data;
+
+ if (!cmp_data)
+ return;
+
+ while (cmp_data->prev)
+ cmp_data = cmp_data->prev;
+
+ while (cmp_data)
+ {
+ int i;
+
+ for (i = 0; i < cmp_data->used; i += cmp_data->data[i])
+ {
+ int *data = cmp_data->data + i;
+ enum composition_method method = (enum composition_method) data[3];
+ Lisp_Object components;
+
+ if (method == COMPOSITION_RELATIVE)
+ components = Qnil;
+ else
+ {
+ int len = data[0] - 4, j;
+ Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1];
+
+ for (j = 0; j < len; j++)
+ args[j] = make_number (data[4 + j]);
+ components = (method == COMPOSITION_WITH_ALTCHARS
+ ? Fstring (len, args) : Fvector (len, args));
+ }
+ compose_text (data[1], data[2], components, Qnil, obj);
+ }
+ cmp_data = cmp_data->next;
+ }
+}
+
+/* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the
+ text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by
+ coding system CODING, and return the status code of code conversion
+ (currently, this value has no meaning).
+
+ How many characters (and bytes) are converted to how many
+ characters (and bytes) are recorded in members of the structure
+ CODING.
+
+ If REPLACE is nonzero, we do various things as if the original text
+ is deleted and a new text is inserted. See the comments in
+ replace_range (insdel.c) to know what we are doing.
+
+ If REPLACE is zero, it is assumed that the source text is unibyte.
+ Otherwize, it is assumed that the source text is multibyte. */
int
-encoding_buffer_size (coding, src_bytes)
+code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace)
+ int from, from_byte, to, to_byte, encodep, replace;
struct coding_system *coding;
- int src_bytes;
{
- int magnification;
+ int len = to - from, len_byte = to_byte - from_byte;
+ int require, inserted, inserted_byte;
+ int head_skip, tail_skip, total_skip = 0;
+ Lisp_Object saved_coding_symbol;
+ int first = 1;
+ unsigned char *src, *dst;
+ Lisp_Object deletion;
+ int orig_point = PT, orig_len = len;
+ int prev_Z;
+ int multibyte_p = !NILP (current_buffer->enable_multibyte_characters);
+
+ coding->src_multibyte = replace && multibyte_p;
+ coding->dst_multibyte = multibyte_p;
+
+ deletion = Qnil;
+ saved_coding_symbol = Qnil;
+
+ if (from < PT && PT < to)
+ {
+ TEMP_SET_PT_BOTH (from, from_byte);
+ orig_point = from;
+ }
- if (coding->type == coding_type_ccl)
- magnification = coding->spec.ccl.encoder.buf_magnification;
+ if (replace)
+ {
+ int saved_from = from;
+
+ prepare_to_modify_buffer (from, to, &from);
+ if (saved_from != from)
+ {
+ to = from + len;
+ from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to);
+ len_byte = to_byte - from_byte;
+ }
+ }
+
+ if (! encodep && CODING_REQUIRE_DETECTION (coding))
+ {
+ /* We must detect encoding of text and eol format. */
+
+ if (from < GPT && to > GPT)
+ move_gap_both (from, from_byte);
+ if (coding->type == coding_type_undecided)
+ {
+ detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte);
+ if (coding->type == coding_type_undecided)
+ /* It seems that the text contains only ASCII, but we
+ should not left it undecided because the deeper
+ decoding routine (decode_coding) tries to detect the
+ encodings again in vain. */
+ coding->type = coding_type_emacs_mule;
+ }
+ if (coding->eol_type == CODING_EOL_UNDECIDED
+ && coding->type != coding_type_ccl)
+ {
+ saved_coding_symbol = coding->symbol;
+ detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte);
+ if (coding->eol_type == CODING_EOL_UNDECIDED)
+ coding->eol_type = CODING_EOL_LF;
+ /* We had better recover the original eol format if we
+ encounter an inconsitent eol format while decoding. */
+ coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL;
+ }
+ }
+
+ /* Now we convert the text. */
+
+ /* For encoding, we must process pre-write-conversion in advance. */
+ if (! inhibit_pre_post_conversion
+ && encodep
+ && SYMBOLP (coding->pre_write_conversion)
+ && ! NILP (Ffboundp (coding->pre_write_conversion)))
+ {
+ /* The function in pre-write-conversion may put a new text in a
+ new buffer. */
+ struct buffer *prev = current_buffer;
+ Lisp_Object new;
+ int count = specpdl_ptr - specpdl;
+
+ record_unwind_protect (code_convert_region_unwind, Qnil);
+ /* We should not call any more pre-write/post-read-conversion
+ functions while this pre-write-conversion is running. */
+ inhibit_pre_post_conversion = 1;
+ call2 (coding->pre_write_conversion,
+ make_number (from), make_number (to));
+ inhibit_pre_post_conversion = 0;
+ /* Discard the unwind protect. */
+ specpdl_ptr--;
+
+ if (current_buffer != prev)
+ {
+ len = ZV - BEGV;
+ new = Fcurrent_buffer ();
+ set_buffer_internal_1 (prev);
+ del_range_2 (from, from_byte, to, to_byte, 0);
+ TEMP_SET_PT_BOTH (from, from_byte);
+ insert_from_buffer (XBUFFER (new), 1, len, 0);
+ Fkill_buffer (new);
+ if (orig_point >= to)
+ orig_point += len - orig_len;
+ else if (orig_point > from)
+ orig_point = from;
+ orig_len = len;
+ to = from + len;
+ from_byte = CHAR_TO_BYTE (from);
+ to_byte = CHAR_TO_BYTE (to);
+ len_byte = to_byte - from_byte;
+ TEMP_SET_PT_BOTH (from, from_byte);
+ }
+ }
+
+ if (replace)
+ deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
+
+ if (coding->composing != COMPOSITION_DISABLED)
+ {
+ if (encodep)
+ coding_save_composition (coding, from, to, Fcurrent_buffer ());
+ else
+ coding_allocate_composition_data (coding, from);
+ }
+
+ /* Try to skip the heading and tailing ASCIIs. */
+ {
+ int from_byte_orig = from_byte, to_byte_orig = to_byte;
+
+ if (from < GPT && GPT < to)
+ move_gap_both (from, from_byte);
+ SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep);
+ if (from_byte == to_byte
+ && (encodep || NILP (coding->post_read_conversion))
+ && ! CODING_REQUIRE_FLUSHING (coding))
+ {
+ coding->produced = len_byte;
+ coding->produced_char = len;
+ if (!replace)
+ /* We must record and adjust for this new text now. */
+ adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len);
+ return 0;
+ }
+
+ head_skip = from_byte - from_byte_orig;
+ tail_skip = to_byte_orig - to_byte;
+ total_skip = head_skip + tail_skip;
+ from += head_skip;
+ to -= tail_skip;
+ len -= total_skip; len_byte -= total_skip;
+ }
+
+ /* The code conversion routine can not preserve text properties for
+ now. So, we must remove all text properties in the region.
+ Here, we must suppress all modification hooks. */
+ if (replace)
+ {
+ int saved_inhibit_modification_hooks = inhibit_modification_hooks;
+ inhibit_modification_hooks = 1;
+ Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil);
+ inhibit_modification_hooks = saved_inhibit_modification_hooks;
+ }
+
+ /* For converion, we must put the gap before the text in addition to
+ making the gap larger for efficient decoding. The required gap
+ size starts from 2000 which is the magic number used in make_gap.
+ But, after one batch of conversion, it will be incremented if we
+ find that it is not enough . */
+ require = 2000;
+
+ if (GAP_SIZE < require)
+ make_gap (require - GAP_SIZE);
+ move_gap_both (from, from_byte);
+
+ inserted = inserted_byte = 0;
+
+ GAP_SIZE += len_byte;
+ ZV -= len;
+ Z -= len;
+ ZV_BYTE -= len_byte;
+ Z_BYTE -= len_byte;
+
+ if (GPT - BEG < BEG_UNCHANGED)
+ BEG_UNCHANGED = GPT - BEG;
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
+ if (!encodep && coding->src_multibyte)
+ {
+ /* Decoding routines expects that the source text is unibyte.
+ We must convert 8-bit characters of multibyte form to
+ unibyte. */
+ int len_byte_orig = len_byte;
+ len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte);
+ if (len_byte < len_byte_orig)
+ safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte,
+ len_byte);
+ coding->src_multibyte = 0;
+ }
+
+ for (;;)
+ {
+ int result;
+
+ /* The buffer memory is now:
+ +--------+converted-text+---------+-------original-text-------+---+
+ |<-from->|<--inserted-->|---------|<--------len_byte--------->|---|
+ |<---------------------- GAP ----------------------->| */
+ src = GAP_END_ADDR - len_byte;
+ dst = GPT_ADDR + inserted_byte;
+
+ if (encodep)
+ result = encode_coding (coding, src, dst, len_byte, 0);
+ else
+ result = decode_coding (coding, src, dst, len_byte, 0);
+
+ /* The buffer memory is now:
+ +--------+-------converted-text----+--+------original-text----+---+
+ |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---|
+ |<---------------------- GAP ----------------------->| */
+
+ inserted += coding->produced_char;
+ inserted_byte += coding->produced;
+ len_byte -= coding->consumed;
+
+ if (result == CODING_FINISH_INSUFFICIENT_CMP)
+ {
+ coding_allocate_composition_data (coding, from + inserted);
+ continue;
+ }
+
+ src += coding->consumed;
+ dst += coding->produced;
+
+ if (result == CODING_FINISH_NORMAL)
+ {
+ src += len_byte;
+ break;
+ }
+ if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL)
+ {
+ unsigned char *pend = dst, *p = pend - inserted_byte;
+ Lisp_Object eol_type;
+
+ /* Encode LFs back to the original eol format (CR or CRLF). */
+ if (coding->eol_type == CODING_EOL_CR)
+ {
+ while (p < pend) if (*p++ == '\n') p[-1] = '\r';
+ }
+ else
+ {
+ int count = 0;
+
+ while (p < pend) if (*p++ == '\n') count++;
+ if (src - dst < count)
+ {
+ /* We don't have sufficient room for encoding LFs
+ back to CRLF. We must record converted and
+ not-yet-converted text back to the buffer
+ content, enlarge the gap, then record them out of
+ the buffer contents again. */
+ int add = len_byte + inserted_byte;
+
+ GAP_SIZE -= add;
+ ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add;
+ GPT += inserted_byte; GPT_BYTE += inserted_byte;
+ make_gap (count - GAP_SIZE);
+ GAP_SIZE += add;
+ ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add;
+ GPT -= inserted_byte; GPT_BYTE -= inserted_byte;
+ /* Don't forget to update SRC, DST, and PEND. */
+ src = GAP_END_ADDR - len_byte;
+ dst = GPT_ADDR + inserted_byte;
+ pend = dst;
+ }
+ inserted += count;
+ inserted_byte += count;
+ coding->produced += count;
+ p = dst = pend + count;
+ while (count)
+ {
+ *--p = *--pend;
+ if (*p == '\n') count--, *--p = '\r';
+ }
+ }
+
+ /* Suppress eol-format conversion in the further conversion. */
+ coding->eol_type = CODING_EOL_LF;
+
+ /* Set the coding system symbol to that for Unix-like EOL. */
+ eol_type = Fget (saved_coding_symbol, Qeol_type);
+ if (VECTORP (eol_type)
+ && XVECTOR (eol_type)->size == 3
+ && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF]))
+ coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF];
+ else
+ coding->symbol = saved_coding_symbol;
+
+ continue;
+ }
+ if (len_byte <= 0)
+ {
+ if (coding->type != coding_type_ccl
+ || coding->mode & CODING_MODE_LAST_BLOCK)
+ break;
+ coding->mode |= CODING_MODE_LAST_BLOCK;
+ continue;
+ }
+ if (result == CODING_FINISH_INSUFFICIENT_SRC)
+ {
+ /* The source text ends in invalid codes. Let's just
+ make them valid buffer contents, and finish conversion. */
+ inserted += len_byte;
+ inserted_byte += len_byte;
+ while (len_byte--)
+ *dst++ = *src++;
+ break;
+ }
+ if (result == CODING_FINISH_INTERRUPT)
+ {
+ /* The conversion procedure was interrupted by a user. */
+ break;
+ }
+ /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */
+ if (coding->consumed < 1)
+ {
+ /* It's quite strange to require more memory without
+ consuming any bytes. Perhaps CCL program bug. */
+ break;
+ }
+ if (first)
+ {
+ /* We have just done the first batch of conversion which was
+ stoped because of insufficient gap. Let's reconsider the
+ required gap size (i.e. SRT - DST) now.
+
+ We have converted ORIG bytes (== coding->consumed) into
+ NEW bytes (coding->produced). To convert the remaining
+ LEN bytes, we may need REQUIRE bytes of gap, where:
+ REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG)
+ REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG
+ Here, we are sure that NEW >= ORIG. */
+ float ratio = coding->produced - coding->consumed;
+ ratio /= coding->consumed;
+ require = len_byte * ratio;
+ first = 0;
+ }
+ if ((src - dst) < (require + 2000))
+ {
+ /* See the comment above the previous call of make_gap. */
+ int add = len_byte + inserted_byte;
+
+ GAP_SIZE -= add;
+ ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add;
+ GPT += inserted_byte; GPT_BYTE += inserted_byte;
+ make_gap (require + 2000);
+ GAP_SIZE += add;
+ ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add;
+ GPT -= inserted_byte; GPT_BYTE -= inserted_byte;
+ }
+ }
+ if (src - dst > 0) *dst = 0; /* Put an anchor. */
+
+ if (encodep && coding->dst_multibyte)
+ {
+ /* The output is unibyte. We must convert 8-bit characters to
+ multibyte form. */
+ if (inserted_byte * 2 > GAP_SIZE)
+ {
+ GAP_SIZE -= inserted_byte;
+ ZV += inserted_byte; Z += inserted_byte;
+ ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte;
+ GPT += inserted_byte; GPT_BYTE += inserted_byte;
+ make_gap (inserted_byte - GAP_SIZE);
+ GAP_SIZE += inserted_byte;
+ ZV -= inserted_byte; Z -= inserted_byte;
+ ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte;
+ GPT -= inserted_byte; GPT_BYTE -= inserted_byte;
+ }
+ inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte);
+ }
+
+ /* If we have shrinked the conversion area, adjust it now. */
+ if (total_skip > 0)
+ {
+ if (tail_skip > 0)
+ safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip);
+ inserted += total_skip; inserted_byte += total_skip;
+ GAP_SIZE += total_skip;
+ GPT -= head_skip; GPT_BYTE -= head_skip;
+ ZV -= total_skip; ZV_BYTE -= total_skip;
+ Z -= total_skip; Z_BYTE -= total_skip;
+ from -= head_skip; from_byte -= head_skip;
+ to += tail_skip; to_byte += tail_skip;
+ }
+
+ prev_Z = Z;
+ adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte);
+ inserted = Z - prev_Z;
+
+ if (!encodep && coding->cmp_data && coding->cmp_data->used)
+ coding_restore_composition (coding, Fcurrent_buffer ());
+ coding_free_composition_data (coding);
+
+ if (! inhibit_pre_post_conversion
+ && ! encodep && ! NILP (coding->post_read_conversion))
+ {
+ Lisp_Object val;
+ int count = specpdl_ptr - specpdl;
+
+ if (from != PT)
+ TEMP_SET_PT_BOTH (from, from_byte);
+ prev_Z = Z;
+ record_unwind_protect (code_convert_region_unwind, Qnil);
+ /* We should not call any more pre-write/post-read-conversion
+ functions while this post-read-conversion is running. */
+ inhibit_pre_post_conversion = 1;
+ val = call1 (coding->post_read_conversion, make_number (inserted));
+ inhibit_pre_post_conversion = 0;
+ /* Discard the unwind protect. */
+ specpdl_ptr--;
+ CHECK_NUMBER (val, 0);
+ inserted += Z - prev_Z;
+ }
+
+ if (orig_point >= from)
+ {
+ if (orig_point >= from + orig_len)
+ orig_point += inserted - orig_len;
+ else
+ orig_point = from;
+ TEMP_SET_PT (orig_point);
+ }
+
+ if (replace)
+ {
+ signal_after_change (from, to - from, inserted);
+ update_compositions (from, from + inserted, CHECK_BORDER);
+ }
+
+ {
+ coding->consumed = to_byte - from_byte;
+ coding->consumed_char = to - from;
+ coding->produced = inserted_byte;
+ coding->produced_char = inserted;
+ }
+
+ return 0;
+}
+
+Lisp_Object
+run_pre_post_conversion_on_str (str, coding, encodep)
+ Lisp_Object str;
+ struct coding_system *coding;
+ int encodep;
+{
+ int count = specpdl_ptr - specpdl;
+ struct gcpro gcpro1;
+ struct buffer *prev = current_buffer;
+ int multibyte = STRING_MULTIBYTE (str);
+
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ record_unwind_protect (code_convert_region_unwind, Qnil);
+ GCPRO1 (str);
+ temp_output_buffer_setup (" *code-converting-work*");
+ set_buffer_internal (XBUFFER (Vstandard_output));
+ /* We must insert the contents of STR as is without
+ unibyte<->multibyte conversion. For that, we adjust the
+ multibyteness of the working buffer to that of STR. */
+ Ferase_buffer ();
+ current_buffer->enable_multibyte_characters = multibyte ? Qt : Qnil;
+ insert_from_string (str, 0, 0,
+ XSTRING (str)->size, STRING_BYTES (XSTRING (str)), 0);
+ UNGCPRO;
+ inhibit_pre_post_conversion = 1;
+ if (encodep)
+ call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z));
else
- magnification = 3;
+ {
+ TEMP_SET_PT_BOTH (BEG, BEG_BYTE);
+ call1 (coding->post_read_conversion, make_number (Z - BEG));
+ }
+ inhibit_pre_post_conversion = 0;
+ str = make_buffer_string (BEG, Z, 0);
+ return unbind_to (count, str);
+}
- return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM);
+Lisp_Object
+decode_coding_string (str, coding, nocopy)
+ Lisp_Object str;
+ struct coding_system *coding;
+ int nocopy;
+{
+ int len;
+ char *buf;
+ int from, to, to_byte;
+ struct gcpro gcpro1;
+ Lisp_Object saved_coding_symbol;
+ int result;
+
+ from = 0;
+ to = XSTRING (str)->size;
+ to_byte = STRING_BYTES (XSTRING (str));
+
+ saved_coding_symbol = Qnil;
+ if (CODING_REQUIRE_DETECTION (coding))
+ {
+ /* See the comments in code_convert_region. */
+ if (coding->type == coding_type_undecided)
+ {
+ detect_coding (coding, XSTRING (str)->data, to_byte);
+ if (coding->type == coding_type_undecided)
+ coding->type = coding_type_emacs_mule;
+ }
+ if (coding->eol_type == CODING_EOL_UNDECIDED
+ && coding->type != coding_type_ccl)
+ {
+ saved_coding_symbol = coding->symbol;
+ detect_eol (coding, XSTRING (str)->data, to_byte);
+ if (coding->eol_type == CODING_EOL_UNDECIDED)
+ coding->eol_type = CODING_EOL_LF;
+ /* We had better recover the original eol format if we
+ encounter an inconsitent eol format while decoding. */
+ coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL;
+ }
+ }
+
+ if (! CODING_REQUIRE_DECODING (coding))
+ {
+ if (!STRING_MULTIBYTE (str))
+ {
+ str = Fstring_as_multibyte (str);
+ nocopy = 1;
+ }
+ return (nocopy ? str : Fcopy_sequence (str));
+ }
+
+ if (STRING_MULTIBYTE (str))
+ {
+ /* Decoding routines expect the source text to be unibyte. */
+ str = Fstring_as_unibyte (str);
+ to_byte = STRING_BYTES (XSTRING (str));
+ nocopy = 1;
+ coding->src_multibyte = 0;
+ }
+ coding->dst_multibyte = 1;
+
+ if (coding->composing != COMPOSITION_DISABLED)
+ coding_allocate_composition_data (coding, from);
+
+ /* Try to skip the heading and tailing ASCIIs. */
+ {
+ int from_orig = from;
+
+ SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data,
+ 0);
+ if (from == to_byte)
+ return (nocopy ? str : Fcopy_sequence (str));
+ }
+
+ len = decoding_buffer_size (coding, to_byte - from);
+ len += from + STRING_BYTES (XSTRING (str)) - to_byte;
+ GCPRO1 (str);
+ buf = get_conversion_buffer (len);
+ UNGCPRO;
+
+ if (from > 0)
+ bcopy (XSTRING (str)->data, buf, from);
+ result = decode_coding (coding, XSTRING (str)->data + from,
+ buf + from, to_byte - from, len);
+ if (result == CODING_FINISH_INCONSISTENT_EOL)
+ {
+ /* We simply try to decode the whole string again but without
+ eol-conversion this time. */
+ coding->eol_type = CODING_EOL_LF;
+ coding->symbol = saved_coding_symbol;
+ coding_free_composition_data (coding);
+ return decode_coding_string (str, coding, nocopy);
+ }
+
+ bcopy (XSTRING (str)->data + to_byte, buf + from + coding->produced,
+ STRING_BYTES (XSTRING (str)) - to_byte);
+
+ len = from + STRING_BYTES (XSTRING (str)) - to_byte;
+ str = make_multibyte_string (buf, len + coding->produced_char,
+ len + coding->produced);
+
+ if (coding->cmp_data && coding->cmp_data->used)
+ coding_restore_composition (coding, str);
+ coding_free_composition_data (coding);
+
+ if (SYMBOLP (coding->post_read_conversion)
+ && !NILP (Ffboundp (coding->post_read_conversion)))
+ str = run_pre_post_conversion_on_str (str, coding, 0);
+
+ return str;
}
-#ifndef MINIMUM_CONVERSION_BUFFER_SIZE
-#define MINIMUM_CONVERSION_BUFFER_SIZE 1024
-#endif
+Lisp_Object
+encode_coding_string (str, coding, nocopy)
+ Lisp_Object str;
+ struct coding_system *coding;
+ int nocopy;
+{
+ int len;
+ char *buf;
+ int from, to, to_byte;
+ struct gcpro gcpro1;
+ Lisp_Object saved_coding_symbol;
+ int result;
-char *conversion_buffer;
-int conversion_buffer_size;
+ if (SYMBOLP (coding->pre_write_conversion)
+ && !NILP (Ffboundp (coding->pre_write_conversion)))
+ str = run_pre_post_conversion_on_str (str, coding, 1);
+
+ from = 0;
+ to = XSTRING (str)->size;
+ to_byte = STRING_BYTES (XSTRING (str));
+
+ saved_coding_symbol = Qnil;
+ if (! CODING_REQUIRE_ENCODING (coding))
+ {
+ if (STRING_MULTIBYTE (str))
+ {
+ str = Fstring_as_unibyte (str);
+ nocopy = 1;
+ }
+ return (nocopy ? str : Fcopy_sequence (str));
+ }
+
+ /* Encoding routines determine the multibyteness of the source text
+ by coding->src_multibyte. */
+ coding->src_multibyte = STRING_MULTIBYTE (str);
+ coding->dst_multibyte = 0;
+
+ if (coding->composing != COMPOSITION_DISABLED)
+ coding_save_composition (coding, from, to, str);
+
+ /* Try to skip the heading and tailing ASCIIs. */
+ {
+ int from_orig = from;
+
+ SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data,
+ 1);
+ if (from == to_byte)
+ return (nocopy ? str : Fcopy_sequence (str));
+ }
-/* Return a pointer to a SIZE bytes of buffer to be used for encoding
- or decoding. Sufficient memory is allocated automatically. If we
- run out of memory, return NULL. */
+ len = encoding_buffer_size (coding, to_byte - from);
+ len += from + STRING_BYTES (XSTRING (str)) - to_byte;
+ GCPRO1 (str);
+ buf = get_conversion_buffer (len);
+ UNGCPRO;
-char *
-get_conversion_buffer (size)
- int size;
-{
- if (size > conversion_buffer_size)
- {
- char *buf;
- int real_size = conversion_buffer_size * 2;
+ if (from > 0)
+ bcopy (XSTRING (str)->data, buf, from);
+ result = encode_coding (coding, XSTRING (str)->data + from,
+ buf + from, to_byte - from, len);
+ bcopy (XSTRING (str)->data + to_byte, buf + from + coding->produced,
+ STRING_BYTES (XSTRING (str)) - to_byte);
- while (real_size < size) real_size *= 2;
- buf = (char *) xmalloc (real_size);
- xfree (conversion_buffer);
- conversion_buffer = buf;
- conversion_buffer_size = real_size;
- }
- return conversion_buffer;
+ len = from + STRING_BYTES (XSTRING (str)) - to_byte;
+ str = make_unibyte_string (buf, len + coding->produced);
+ coding_free_composition_data (coding);
+
+ return str;
}
\f
#ifdef emacs
-/*** 7. Emacs Lisp library functions ***/
+/*** 8. Emacs Lisp library functions ***/
DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0,
"Return t if OBJECT is nil or a coding-system.\n\
-See document of make-coding-system for coding-system object.")
+See the documentation of `make-coding-system' for information\n\
+about coding-system objects.")
(obj)
Lisp_Object obj;
{
DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system,
1, 1, 0,
"Check validity of CODING-SYSTEM.\n\
-If valid, return CODING-SYSTEM, else `coding-system-error' is signaled.\n\
-CODING-SYSTEM is valid if it is a symbol and has \"coding-system\" property.\n\
+If valid, return CODING-SYSTEM, else signal a `coding-system-error' error.\n\
+It is valid if it is a symbol with a non-nil `coding-system' property.\n\
The value of property should be a vector of length 5.")
(coding_system)
Lisp_Object coding_system;
while (1)
Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil));
}
-
-DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region,
- 2, 2, 0,
- "Detect coding system of the text in the region between START and END.\n\
-Return a list of possible coding systems ordered by priority.\n\
-If only ASCII characters are found, it returns `undecided'\n\
- or its subsidiary coding system according to a detected end-of-line format.")
- (b, e)
- Lisp_Object b, e;
+\f
+Lisp_Object
+detect_coding_system (src, src_bytes, highest)
+ unsigned char *src;
+ int src_bytes, highest;
{
int coding_mask, eol_type;
- Lisp_Object val;
- int beg, end;
-
- validate_region (&b, &e);
- beg = XINT (b), end = XINT (e);
- if (beg < GPT && end >= GPT) move_gap (end);
+ Lisp_Object val, tmp;
+ int dummy;
- coding_mask = detect_coding_mask (POS_ADDR (beg), end - beg);
- eol_type = detect_eol_type (POS_ADDR (beg), end - beg);
+ coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy);
+ eol_type = detect_eol_type (src, src_bytes, &dummy);
+ if (eol_type == CODING_EOL_INCONSISTENT)
+ eol_type = CODING_EOL_UNDECIDED;
- if (coding_mask == CODING_CATEGORY_MASK_ANY)
+ if (!coding_mask)
{
val = Qundecided;
- if (eol_type != CODING_EOL_UNDECIDED
- && eol_type != CODING_EOL_INCONSISTENT)
+ if (eol_type != CODING_EOL_UNDECIDED)
{
Lisp_Object val2;
val2 = Fget (Qundecided, Qeol_type);
if (VECTORP (val2))
val = XVECTOR (val2)->contents[eol_type];
}
+ return (highest ? val : Fcons (val, Qnil));
}
- else
- {
- Lisp_Object val2;
-
- /* At first, gather possible coding-systems in VAL in a reverse
- order. */
- val = Qnil;
- for (val2 = Vcoding_category_list;
- !NILP (val2);
- val2 = XCONS (val2)->cdr)
- {
- int idx
- = XFASTINT (Fget (XCONS (val2)->car, Qcoding_category_index));
- if (coding_mask & (1 << idx))
- {
-#if 0
- /* This code is suppressed until we find a better way to
- distinguish raw text file and binary file. */
- if (idx == CODING_CATEGORY_IDX_RAW_TEXT
- && eol_type == CODING_EOL_INCONSISTENT)
- val = Fcons (Qno_conversion, val);
- else
-#endif /* 0 */
- val = Fcons (Fsymbol_value (XCONS (val2)->car), val);
- }
- }
+ /* At first, gather possible coding systems in VAL. */
+ val = Qnil;
+ for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp))
+ {
+ Lisp_Object category_val, category_index;
- /* Then, change the order of the list, while getting subsidiary
- coding-systems. */
- val2 = val;
- val = Qnil;
- if (eol_type == CODING_EOL_INCONSISTENT)
- eol_type == CODING_EOL_UNDECIDED;
- for (; !NILP (val2); val2 = XCONS (val2)->cdr)
+ category_index = Fget (XCAR (tmp), Qcoding_category_index);
+ category_val = Fsymbol_value (XCAR (tmp));
+ if (!NILP (category_val)
+ && NATNUMP (category_index)
+ && (coding_mask & (1 << XFASTINT (category_index))))
{
- if (eol_type == CODING_EOL_UNDECIDED)
- val = Fcons (XCONS (val2)->car, val);
- else
- {
- Lisp_Object val3;
- val3 = Fget (XCONS (val2)->car, Qeol_type);
- if (VECTORP (val3))
- val = Fcons (XVECTOR (val3)->contents[eol_type], val);
- else
- val = Fcons (XCONS (val2)->car, val);
- }
+ val = Fcons (category_val, val);
+ if (highest)
+ break;
}
}
+ if (!highest)
+ val = Fnreverse (val);
- return val;
-}
-
-/* Scan text in the region between *BEGP and *ENDP, skip characters
- which we never have to encode to (iff ENCODEP is 1) or decode from
- coding system CODING at the head and tail, then set BEGP and ENDP
- to the addresses of start and end of the text we actually convert. */
-
-void
-shrink_conversion_area (begp, endp, coding, encodep)
- unsigned char **begp, **endp;
- struct coding_system *coding;
- int encodep;
-{
- register unsigned char *beg_addr = *begp, *end_addr = *endp;
-
- if (coding->eol_type != CODING_EOL_LF
- && coding->eol_type != CODING_EOL_UNDECIDED)
- /* Since we anyway have to convert end-of-line format, it is not
- worth skipping at most 100 bytes or so. */
- return;
-
- if (encodep) /* for encoding */
- {
- switch (coding->type)
- {
- case coding_type_no_conversion:
- case coding_type_emacs_mule:
- case coding_type_undecided:
- case coding_type_raw_text:
- /* We need no conversion. */
- *begp = *endp;
- return;
- case coding_type_ccl:
- /* We can't skip any data. */
- return;
- case coding_type_iso2022:
- if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL)
- {
- unsigned char *bol = beg_addr;
- while (beg_addr < end_addr && *beg_addr < 0x80)
- {
- beg_addr++;
- if (*(beg_addr - 1) == '\n')
- bol = beg_addr;
- }
- beg_addr = bol;
- goto label_skip_tail;
- }
- /* fall down ... */
- default:
- /* We can skip all ASCII characters at the head and tail. */
- while (beg_addr < end_addr && *beg_addr < 0x80) beg_addr++;
- label_skip_tail:
- while (beg_addr < end_addr && *(end_addr - 1) < 0x80) end_addr--;
- break;
- }
- }
- else /* for decoding */
+ /* Then, replace the elements with subsidiary coding systems. */
+ for (tmp = val; CONSP (tmp); tmp = XCDR (tmp))
{
- switch (coding->type)
+ if (eol_type != CODING_EOL_UNDECIDED
+ && eol_type != CODING_EOL_INCONSISTENT)
{
- case coding_type_no_conversion:
- /* We need no conversion. */
- *begp = *endp;
- return;
- case coding_type_emacs_mule:
- case coding_type_raw_text:
- if (coding->eol_type == CODING_EOL_LF)
- {
- /* We need no conversion. */
- *begp = *endp;
- return;
- }
- /* We can skip all but carriage-return. */
- while (beg_addr < end_addr && *beg_addr != '\r') beg_addr++;
- while (beg_addr < end_addr && *(end_addr - 1) != '\r') end_addr--;
- break;
- case coding_type_sjis:
- case coding_type_big5:
- /* We can skip all ASCII characters at the head. */
- while (beg_addr < end_addr && *beg_addr < 0x80) beg_addr++;
- /* We can skip all ASCII characters at the tail except for
- the second byte of SJIS or BIG5 code. */
- while (beg_addr < end_addr && *(end_addr - 1) < 0x80) end_addr--;
- if (end_addr != *endp)
- end_addr++;
- break;
- case coding_type_ccl:
- /* We can't skip any data. */
- return;
- default: /* i.e. case coding_type_iso2022: */
- {
- unsigned char c;
-
- /* We can skip all ASCII characters except for a few
- control codes at the head. */
- while (beg_addr < end_addr && (c = *beg_addr) < 0x80
- && c != ISO_CODE_CR && c != ISO_CODE_SO
- && c != ISO_CODE_SI && c != ISO_CODE_ESC)
- beg_addr++;
- }
- break;
+ Lisp_Object eol;
+ eol = Fget (XCAR (tmp), Qeol_type);
+ if (VECTORP (eol))
+ XCAR (tmp) = XVECTOR (eol)->contents[eol_type];
}
}
- *begp = beg_addr;
- *endp = end_addr;
- return;
-}
-
-/* Encode to (iff ENCODEP is 1) or decode form coding system CODING a
- text between B and E. B and E are buffer position. */
+ return (highest ? XCAR (val) : val);
+}
-Lisp_Object
-code_convert_region (b, e, coding, encodep)
- Lisp_Object b, e;
- struct coding_system *coding;
- int encodep;
+DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region,
+ 2, 3, 0,
+ "Detect coding system of the text in the region between START and END.\n\
+Return a list of possible coding systems ordered by priority.\n\
+\n\
+If only ASCII characters are found, it returns a list of single element\n\
+`undecided' or its subsidiary coding system according to a detected\n\
+end-of-line format.\n\
+\n\
+If optional argument HIGHEST is non-nil, return the coding system of\n\
+highest priority.")
+ (start, end, highest)
+ Lisp_Object start, end, highest;
{
- int beg, end, len, consumed, produced;
- char *buf;
- unsigned char *begp, *endp;
- int pos = PT;
+ int from, to;
+ int from_byte, to_byte;
- validate_region (&b, &e);
- beg = XINT (b), end = XINT (e);
- if (beg < GPT && end >= GPT)
- move_gap (end);
+ CHECK_NUMBER_COERCE_MARKER (start, 0);
+ CHECK_NUMBER_COERCE_MARKER (end, 1);
- if (encodep && !NILP (coding->pre_write_conversion))
- {
- /* We must call a pre-conversion function which may put a new
- text to be converted in a new buffer. */
- struct buffer *old = current_buffer, *new;
-
- TEMP_SET_PT (beg);
- call2 (coding->pre_write_conversion, b, e);
- if (old != current_buffer)
- {
- /* Replace the original text by the text just generated. */
- len = ZV - BEGV;
- new = current_buffer;
- set_buffer_internal (old);
- del_range (beg, end);
- insert_from_buffer (new, 1, len, 0);
- end = beg + len;
- }
- }
+ validate_region (&start, &end);
+ from = XINT (start), to = XINT (end);
+ from_byte = CHAR_TO_BYTE (from);
+ to_byte = CHAR_TO_BYTE (to);
- /* We may be able to shrink the conversion region. */
- begp = POS_ADDR (beg); endp = begp + (end - beg);
- shrink_conversion_area (&begp, &endp, coding, encodep);
-
- if (begp == endp)
- /* We need no conversion. */
- len = end - beg;
- else
- {
- beg += begp - POS_ADDR (beg);
- end = beg + (endp - begp);
+ if (from < GPT && to >= GPT)
+ move_gap_both (to, to_byte);
- if (encodep)
- len = encoding_buffer_size (coding, end - beg);
- else
- len = decoding_buffer_size (coding, end - beg);
- buf = get_conversion_buffer (len);
-
- coding->last_block = 1;
- produced = (encodep
- ? encode_coding (coding, POS_ADDR (beg), buf, end - beg, len,
- &consumed)
- : decode_coding (coding, POS_ADDR (beg), buf, end - beg, len,
- &consumed));
-
- len = produced + (beg - XINT (b)) + (XINT (e) - end);
-
- TEMP_SET_PT (beg);
- insert (buf, produced);
- del_range (PT, PT + end - beg);
- if (pos >= end)
- pos = PT + (pos - end);
- else if (pos > beg)
- pos = beg;
- TEMP_SET_PT (pos);
- }
+ return detect_coding_system (BYTE_POS_ADDR (from_byte),
+ to_byte - from_byte,
+ !NILP (highest));
+}
- if (!encodep && !NILP (coding->post_read_conversion))
- {
- /* We must call a post-conversion function which may alter
- the text just converted. */
- Lisp_Object insval;
-
- beg = XINT (b);
- TEMP_SET_PT (beg);
- insval = call1 (coding->post_read_conversion, make_number (len));
- CHECK_NUMBER (insval, 0);
- if (pos >= beg + len)
- pos = beg + XINT (insval);
- else if (pos > beg)
- pos = beg;
- TEMP_SET_PT (pos);
- len = XINT (insval);
- }
+DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string,
+ 1, 2, 0,
+ "Detect coding system of the text in STRING.\n\
+Return a list of possible coding systems ordered by priority.\n\
+\n\
+If only ASCII characters are found, it returns a list of single element\n\
+`undecided' or its subsidiary coding system according to a detected\n\
+end-of-line format.\n\
+\n\
+If optional argument HIGHEST is non-nil, return the coding system of\n\
+highest priority.")
+ (string, highest)
+ Lisp_Object string, highest;
+{
+ CHECK_STRING (string, 0);
- return make_number (len);
+ return detect_coding_system (XSTRING (string)->data,
+ STRING_BYTES (XSTRING (string)),
+ !NILP (highest));
}
Lisp_Object
-code_convert_string (str, coding, encodep, nocopy)
- Lisp_Object str, nocopy;
- struct coding_system *coding;
+code_convert_region1 (start, end, coding_system, encodep)
+ Lisp_Object start, end, coding_system;
int encodep;
{
- int len, consumed, produced;
- char *buf;
- unsigned char *begp, *endp;
- int head_skip, tail_skip;
- struct gcpro gcpro1;
-
- if (encodep && !NILP (coding->pre_write_conversion)
- || !encodep && !NILP (coding->post_read_conversion))
- {
- /* Since we have to call Lisp functions which assume target text
- is in a buffer, after setting a temporary buffer, call
- code_convert_region. */
- int count = specpdl_ptr - specpdl;
- int len = XSTRING (str)->size;
- Lisp_Object result;
- struct buffer *old = current_buffer;
-
- record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
- temp_output_buffer_setup (" *code-converting-work*");
- set_buffer_internal (XBUFFER (Vstandard_output));
- insert_from_string (str, 0, len, 0);
- code_convert_region (make_number (BEGV), make_number (ZV),
- coding, encodep);
- result = make_buffer_string (BEGV, ZV, 0);
- set_buffer_internal (old);
- return unbind_to (count, result);
- }
-
- /* We may be able to shrink the conversion region. */
- begp = XSTRING (str)->data;
- endp = begp + XSTRING (str)->size;
- shrink_conversion_area (&begp, &endp, coding, encodep);
-
- if (begp == endp)
- /* We need no conversion. */
- return (NILP (nocopy) ? Fcopy_sequence (str) : str);
-
- head_skip = begp - XSTRING (str)->data;
- tail_skip = XSTRING (str)->size - head_skip - (endp - begp);
+ struct coding_system coding;
+ int from, to, len;
- GCPRO1 (str);
+ CHECK_NUMBER_COERCE_MARKER (start, 0);
+ CHECK_NUMBER_COERCE_MARKER (end, 1);
+ CHECK_SYMBOL (coding_system, 2);
- if (encodep)
- len = encoding_buffer_size (coding, endp - begp);
- else
- len = decoding_buffer_size (coding, endp - begp);
- buf = get_conversion_buffer (len + head_skip + tail_skip);
-
- bcopy (XSTRING (str)->data, buf, head_skip);
- coding->last_block = 1;
- produced = (encodep
- ? encode_coding (coding, XSTRING (str)->data + head_skip,
- buf + head_skip, endp - begp, len, &consumed)
- : decode_coding (coding, XSTRING (str)->data + head_skip,
- buf + head_skip, endp - begp, len, &consumed));
- bcopy (XSTRING (str)->data + head_skip + (endp - begp),
- buf + head_skip + produced,
- tail_skip);
+ validate_region (&start, &end);
+ from = XFASTINT (start);
+ to = XFASTINT (end);
- UNGCPRO;
+ if (NILP (coding_system))
+ return make_number (to - from);
- return make_string (buf, head_skip + produced + tail_skip);
+ if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0)
+ error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data);
+
+ coding.mode |= CODING_MODE_LAST_BLOCK;
+ coding.src_multibyte = coding.dst_multibyte
+ = !NILP (current_buffer->enable_multibyte_characters);
+ code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to),
+ &coding, encodep, 1);
+ Vlast_coding_system_used = coding.symbol;
+ return make_number (coding.produced_char);
}
DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region,
3, 3, "r\nzCoding system: ",
- "Decode current region by specified coding system.\n\
+ "Decode the current region by specified coding system.\n\
When called from a program, takes three arguments:\n\
-START, END, and CODING-SYSTEM. START END are buffer positions.\n\
-Return length of decoded text.")
- (b, e, coding_system)
- Lisp_Object b, e, coding_system;
+START, END, and CODING-SYSTEM. START and END are buffer positions.\n\
+This function sets `last-coding-system-used' to the precise coding system\n\
+used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\
+not fully specified.)\n\
+It returns the length of the decoded text.")
+ (start, end, coding_system)
+ Lisp_Object start, end, coding_system;
{
- struct coding_system coding;
-
- CHECK_NUMBER_COERCE_MARKER (b, 0);
- CHECK_NUMBER_COERCE_MARKER (e, 1);
- CHECK_SYMBOL (coding_system, 2);
-
- if (NILP (coding_system))
- return make_number (XFASTINT (e) - XFASTINT (b));
- if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0)
- error ("Invalid coding-system: %s", XSYMBOL (coding_system)->name->data);
-
- return code_convert_region (b, e, &coding, 0);
+ return code_convert_region1 (start, end, coding_system, 0);
}
DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region,
3, 3, "r\nzCoding system: ",
- "Encode current region by specified coding system.\n\
+ "Encode the current region by specified coding system.\n\
When called from a program, takes three arguments:\n\
-START, END, and CODING-SYSTEM. START END are buffer positions.\n\
-Return length of encoded text.")
- (b, e, coding_system)
- Lisp_Object b, e, coding_system;
+START, END, and CODING-SYSTEM. START and END are buffer positions.\n\
+This function sets `last-coding-system-used' to the precise coding system\n\
+used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\
+not fully specified.)\n\
+It returns the length of the encoded text.")
+ (start, end, coding_system)
+ Lisp_Object start, end, coding_system;
+{
+ return code_convert_region1 (start, end, coding_system, 1);
+}
+
+Lisp_Object
+code_convert_string1 (string, coding_system, nocopy, encodep)
+ Lisp_Object string, coding_system, nocopy;
+ int encodep;
{
struct coding_system coding;
- CHECK_NUMBER_COERCE_MARKER (b, 0);
- CHECK_NUMBER_COERCE_MARKER (e, 1);
- CHECK_SYMBOL (coding_system, 2);
+ CHECK_STRING (string, 0);
+ CHECK_SYMBOL (coding_system, 1);
if (NILP (coding_system))
- return make_number (XFASTINT (e) - XFASTINT (b));
+ return (NILP (nocopy) ? Fcopy_sequence (string) : string);
+
if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0)
- error ("Invalid coding-system: %s", XSYMBOL (coding_system)->name->data);
+ error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data);
- return code_convert_region (b, e, &coding, 1);
+ coding.mode |= CODING_MODE_LAST_BLOCK;
+ string = (encodep
+ ? encode_coding_string (string, &coding, !NILP (nocopy))
+ : decode_coding_string (string, &coding, !NILP (nocopy)));
+ Vlast_coding_system_used = coding.symbol;
+
+ return string;
}
DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string,
2, 3, 0,
"Decode STRING which is encoded in CODING-SYSTEM, and return the result.\n\
Optional arg NOCOPY non-nil means it is ok to return STRING itself\n\
-if the decoding operation is trivial.")
+if the decoding operation is trivial.\n\
+This function sets `last-coding-system-used' to the precise coding system\n\
+used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\
+not fully specified.)")
(string, coding_system, nocopy)
Lisp_Object string, coding_system, nocopy;
{
- struct coding_system coding;
-
- CHECK_STRING (string, 0);
- CHECK_SYMBOL (coding_system, 1);
-
- if (NILP (coding_system))
- return (NILP (nocopy) ? Fcopy_sequence (string) : string);
- if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0)
- error ("Invalid coding-system: %s", XSYMBOL (coding_system)->name->data);
-
- return code_convert_string (string, &coding, 0, nocopy);
+ return code_convert_string1 (string, coding_system, nocopy, 0);
}
DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string,
2, 3, 0,
"Encode STRING to CODING-SYSTEM, and return the result.\n\
Optional arg NOCOPY non-nil means it is ok to return STRING itself\n\
-if the encoding operation is trivial.")
+if the encoding operation is trivial.\n\
+This function sets `last-coding-system-used' to the precise coding system\n\
+used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\
+not fully specified.)")
(string, coding_system, nocopy)
Lisp_Object string, coding_system, nocopy;
+{
+ return code_convert_string1 (string, coding_system, nocopy, 1);
+}
+
+/* Encode or decode STRING according to CODING_SYSTEM.
+ Do not set Vlast_coding_system_used.
+
+ This function is called only from macros DECODE_FILE and
+ ENCODE_FILE, thus we ignore character composition. */
+
+Lisp_Object
+code_convert_string_norecord (string, coding_system, encodep)
+ Lisp_Object string, coding_system;
+ int encodep;
{
struct coding_system coding;
CHECK_SYMBOL (coding_system, 1);
if (NILP (coding_system))
- return (NILP (nocopy) ? Fcopy_sequence (string) : string);
+ return string;
+
if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0)
- error ("Invalid coding-system: %s", XSYMBOL (coding_system)->name->data);
+ error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data);
- return code_convert_string (string, &coding, 1, nocopy);
+ coding.composing = COMPOSITION_DISABLED;
+ coding.mode |= CODING_MODE_LAST_BLOCK;
+ return (encodep
+ ? encode_coding_string (string, &coding, 1)
+ : decode_coding_string (string, &coding, 1));
}
-
+\f
DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0,
- "Decode a JISX0208 character of shift-jis encoding.\n\
-CODE is the character code in SJIS.\n\
+ "Decode a Japanese character which has CODE in shift_jis encoding.\n\
Return the corresponding character.")
(code)
Lisp_Object code;
CHECK_NUMBER (code, 0);
s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF;
- DECODE_SJIS (s1, s2, c1, c2);
- XSETFASTINT (val, MAKE_NON_ASCII_CHAR (charset_jisx0208, c1, c2));
+ if (s1 == 0)
+ {
+ if (s2 < 0x80)
+ XSETFASTINT (val, s2);
+ else if (s2 >= 0xA0 || s2 <= 0xDF)
+ XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0));
+ else
+ error ("Invalid Shift JIS code: %x", XFASTINT (code));
+ }
+ else
+ {
+ if ((s1 < 0x80 || s1 > 0x9F && s1 < 0xE0 || s1 > 0xEF)
+ || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC))
+ error ("Invalid Shift JIS code: %x", XFASTINT (code));
+ DECODE_SJIS (s1, s2, c1, c2);
+ XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2));
+ }
return val;
}
DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0,
- "Encode a JISX0208 character CHAR to SJIS coding-system.\n\
-Return the corresponding character code in SJIS.")
+ "Encode a Japanese character CHAR to shift_jis encoding.\n\
+Return the corresponding code in SJIS.")
(ch)
Lisp_Object ch;
{
CHECK_NUMBER (ch, 0);
SPLIT_CHAR (XFASTINT (ch), charset, c1, c2);
- if (charset == charset_jisx0208)
+ if (charset == CHARSET_ASCII)
+ {
+ val = ch;
+ }
+ else if (charset == charset_jisx0208
+ && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F)
{
ENCODE_SJIS (c1, c2, s1, s2);
XSETFASTINT (val, (s1 << 8) | s2);
}
+ else if (charset == charset_katakana_jisx0201
+ && c1 > 0x20 && c2 < 0xE0)
+ {
+ XSETFASTINT (val, c1 | 0x80);
+ }
else
- XSETFASTINT (val, 0);
+ error ("Can't encode to shift_jis: %d", XFASTINT (ch));
return val;
}
DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0,
- "Decode a Big5 character CODE of BIG5 coding-system.\n\
-CODE is the character code in BIG5.\n\
+ "Decode a Big5 character which has CODE in BIG5 coding system.\n\
Return the corresponding character.")
(code)
Lisp_Object code;
CHECK_NUMBER (code, 0);
b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF;
- DECODE_BIG5 (b1, b2, charset, c1, c2);
- XSETFASTINT (val, MAKE_NON_ASCII_CHAR (charset, c1, c2));
+ if (b1 == 0)
+ {
+ if (b2 >= 0x80)
+ error ("Invalid BIG5 code: %x", XFASTINT (code));
+ val = code;
+ }
+ else
+ {
+ if ((b1 < 0xA1 || b1 > 0xFE)
+ || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE))
+ error ("Invalid BIG5 code: %x", XFASTINT (code));
+ DECODE_BIG5 (b1, b2, charset, c1, c2);
+ XSETFASTINT (val, MAKE_CHAR (charset, c1, c2));
+ }
return val;
}
DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0,
- "Encode the Big5 character CHAR to BIG5 coding-system.\n\
+ "Encode the Big5 character CHAR to BIG5 coding system.\n\
Return the corresponding character code in Big5.")
(ch)
Lisp_Object ch;
CHECK_NUMBER (ch, 0);
SPLIT_CHAR (XFASTINT (ch), charset, c1, c2);
- if (charset == charset_big5_1 || charset == charset_big5_2)
+ if (charset == CHARSET_ASCII)
+ {
+ val = ch;
+ }
+ else if ((charset == charset_big5_1
+ && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec))
+ || (charset == charset_big5_2
+ && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2))
{
ENCODE_BIG5 (charset, c1, c2, b1, b2);
XSETFASTINT (val, (b1 << 8) | b2);
}
else
- XSETFASTINT (val, 0);
+ error ("Can't encode to Big5: %d", XFASTINT (ch));
return val;
}
-
+\f
DEFUN ("set-terminal-coding-system-internal",
Fset_terminal_coding_system_internal,
Sset_terminal_coding_system_internal, 1, 1, 0, "")
setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding);
/* We had better not send unsafe characters to terminal. */
terminal_coding.flags |= CODING_FLAG_ISO_SAFE;
-
+ /* Characer composition should be disabled. */
+ terminal_coding.composing = COMPOSITION_DISABLED;
+ terminal_coding.src_multibyte = 1;
+ terminal_coding.dst_multibyte = 0;
return Qnil;
}
CHECK_SYMBOL (coding_system, 0);
setup_coding_system (Fcheck_coding_system (coding_system),
&safe_terminal_coding);
+ /* Characer composition should be disabled. */
+ safe_terminal_coding.composing = COMPOSITION_DISABLED;
+ safe_terminal_coding.src_multibyte = 1;
+ safe_terminal_coding.dst_multibyte = 0;
return Qnil;
}
DEFUN ("terminal-coding-system",
Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0,
- "Return coding-system of your terminal.")
+ "Return coding system specified for terminal output.")
()
{
return terminal_coding.symbol;
{
CHECK_SYMBOL (coding_system, 0);
setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding);
+ /* Characer composition should be disabled. */
+ keyboard_coding.composing = COMPOSITION_DISABLED;
return Qnil;
}
DEFUN ("keyboard-coding-system",
Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0,
- "Return coding-system of what is sent from terminal keyboard.")
+ "Return coding system specified for decoding keyboard input.")
()
{
return keyboard_coding.symbol;
DEFUN ("find-operation-coding-system", Ffind_operation_coding_system,
Sfind_operation_coding_system, 1, MANY, 0,
"Choose a coding system for an operation based on the target name.\n\
-The value names a pair of coding systems: (DECODING-SYSTEM ENCODING-SYSTEM).\n\
+The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM).\n\
DECODING-SYSTEM is the coding system to use for decoding\n\
\(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system\n\
for encoding (in case OPERATION does encoding).\n\
if (NILP (chain))
return Qnil;
- for (; CONSP (chain); chain = XCONS (chain)->cdr)
+ for (; CONSP (chain); chain = XCDR (chain))
{
Lisp_Object elt;
- elt = XCONS (chain)->car;
+ elt = XCAR (chain);
if (CONSP (elt)
&& ((STRINGP (target)
- && STRINGP (XCONS (elt)->car)
- && fast_string_match (XCONS (elt)->car, target) >= 0)
- || (INTEGERP (target) && EQ (target, XCONS (elt)->car))))
+ && STRINGP (XCAR (elt))
+ && fast_string_match (XCAR (elt), target) >= 0)
+ || (INTEGERP (target) && EQ (target, XCAR (elt)))))
{
- val = XCONS (elt)->cdr;
+ val = XCDR (elt);
/* Here, if VAL is both a valid coding system and a valid
function symbol, we return VAL as a coding system. */
if (CONSP (val))
return Qnil;
}
+DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal,
+ Supdate_coding_systems_internal, 0, 0, 0,
+ "Update internal database for ISO2022 and CCL based coding systems.\n\
+When values of any coding categories are changed, you must\n\
+call this function")
+ ()
+{
+ int i;
+
+ for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++)
+ {
+ Lisp_Object val;
+
+ val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[i])->value;
+ if (!NILP (val))
+ {
+ if (! coding_system_table[i])
+ coding_system_table[i] = ((struct coding_system *)
+ xmalloc (sizeof (struct coding_system)));
+ setup_coding_system (val, coding_system_table[i]);
+ }
+ else if (coding_system_table[i])
+ {
+ xfree (coding_system_table[i]);
+ coding_system_table[i] = NULL;
+ }
+ }
+
+ return Qnil;
+}
+
+DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal,
+ Sset_coding_priority_internal, 0, 0, 0,
+ "Update internal database for the current value of `coding-category-list'.\n\
+This function is internal use only.")
+ ()
+{
+ int i = 0, idx;
+ Lisp_Object val;
+
+ val = Vcoding_category_list;
+
+ while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX)
+ {
+ if (! SYMBOLP (XCAR (val)))
+ break;
+ idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index));
+ if (idx >= CODING_CATEGORY_IDX_MAX)
+ break;
+ coding_priorities[i++] = (1 << idx);
+ val = XCDR (val);
+ }
+ /* If coding-category-list is valid and contains all coding
+ categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not,
+ the following code saves Emacs from crashing. */
+ while (i < CODING_CATEGORY_IDX_MAX)
+ coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT;
+
+ return Qnil;
+}
+
#endif /* emacs */
\f
-/*** 8. Post-amble ***/
+/*** 9. Post-amble ***/
+
+void
+init_coding ()
+{
+ conversion_buffer = (char *) xmalloc (MINIMUM_CONVERSION_BUFFER_SIZE);
+}
+void
init_coding_once ()
{
int i;
for (i = 0x21 ; i < 0x7F; i++)
emacs_code_class[i] = EMACS_ascii_code;
emacs_code_class[0x7F] = EMACS_control_code;
- emacs_code_class[0x80] = EMACS_leading_code_composition;
- for (i = 0x81; i < 0xFF; i++)
+ for (i = 0x80; i < 0xFF; i++)
emacs_code_class[i] = EMACS_invalid_code;
emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3;
emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3;
/* ISO2022 specific initialize routine. */
for (i = 0; i < 0x20; i++)
- iso_code_class[i] = ISO_control_code;
+ iso_code_class[i] = ISO_control_0;
for (i = 0x21; i < 0x7F; i++)
iso_code_class[i] = ISO_graphic_plane_0;
for (i = 0x80; i < 0xA0; i++)
- iso_code_class[i] = ISO_control_code;
+ iso_code_class[i] = ISO_control_1;
for (i = 0xA1; i < 0xFF; i++)
iso_code_class[i] = ISO_graphic_plane_1;
iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F;
iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer;
conversion_buffer_size = MINIMUM_CONVERSION_BUFFER_SIZE;
- conversion_buffer = (char *) xmalloc (MINIMUM_CONVERSION_BUFFER_SIZE);
setup_coding_system (Qnil, &keyboard_coding);
setup_coding_system (Qnil, &terminal_coding);
setup_coding_system (Qnil, &safe_terminal_coding);
+ setup_coding_system (Qnil, &default_buffer_file_coding);
+
+ bzero (coding_system_table, sizeof coding_system_table);
+
+ bzero (ascii_skip_code, sizeof ascii_skip_code);
+ for (i = 0; i < 128; i++)
+ ascii_skip_code[i] = 1;
#if defined (MSDOS) || defined (WINDOWSNT)
system_eol_type = CODING_EOL_CRLF;
#else
system_eol_type = CODING_EOL_LF;
#endif
+
+ inhibit_pre_post_conversion = 0;
}
#ifdef emacs
+void
syms_of_coding ()
{
Qtarget_idx = intern ("target-idx");
Fput (Qcoding_system_error, Qerror_message,
build_string ("Invalid coding system"));
+ Qcoding_category = intern ("coding-category");
+ staticpro (&Qcoding_category);
Qcoding_category_index = intern ("coding-category-index");
staticpro (&Qcoding_category_index);
+ Vcoding_category_table
+ = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil);
+ staticpro (&Vcoding_category_table);
{
int i;
for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++)
{
- coding_category_table[i] = intern (coding_category_name[i]);
- staticpro (&coding_category_table[i]);
- Fput (coding_category_table[i], Qcoding_category_index,
- make_number (i));
+ XVECTOR (Vcoding_category_table)->contents[i]
+ = intern (coding_category_name[i]);
+ Fput (XVECTOR (Vcoding_category_table)->contents[i],
+ Qcoding_category_index, make_number (i));
}
}
- Qcharacter_unification_table = intern ("character-unification-table");
- staticpro (&Qcharacter_unification_table);
- Fput (Qcharacter_unification_table, Qchar_table_extra_slots,
- make_number (0));
+ Qtranslation_table = intern ("translation-table");
+ staticpro (&Qtranslation_table);
+ Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1));
- Qcharacter_unification_table_for_decode
- = intern ("character-unification-table-for-decode");
- staticpro (&Qcharacter_unification_table_for_decode);
+ Qtranslation_table_id = intern ("translation-table-id");
+ staticpro (&Qtranslation_table_id);
- Qcharacter_unification_table_for_encode
- = intern ("character-unification-table-for-encode");
- staticpro (&Qcharacter_unification_table_for_encode);
+ Qtranslation_table_for_decode = intern ("translation-table-for-decode");
+ staticpro (&Qtranslation_table_for_decode);
+
+ Qtranslation_table_for_encode = intern ("translation-table-for-encode");
+ staticpro (&Qtranslation_table_for_encode);
Qsafe_charsets = intern ("safe-charsets");
staticpro (&Qsafe_charsets);
+ Qvalid_codes = intern ("valid-codes");
+ staticpro (&Qvalid_codes);
+
Qemacs_mule = intern ("emacs-mule");
staticpro (&Qemacs_mule);
+ Qraw_text = intern ("raw-text");
+ staticpro (&Qraw_text);
+
defsubr (&Scoding_system_p);
defsubr (&Sread_coding_system);
defsubr (&Sread_non_nil_coding_system);
defsubr (&Scheck_coding_system);
defsubr (&Sdetect_coding_region);
+ defsubr (&Sdetect_coding_string);
defsubr (&Sdecode_coding_region);
defsubr (&Sencode_coding_region);
defsubr (&Sdecode_coding_string);
defsubr (&Sset_keyboard_coding_system_internal);
defsubr (&Skeyboard_coding_system);
defsubr (&Sfind_operation_coding_system);
+ defsubr (&Supdate_coding_systems_internal);
+ defsubr (&Sset_coding_priority_internal);
DEFVAR_LISP ("coding-system-list", &Vcoding_system_list,
"List of coding systems.\n\
Vcoding_category_list = Qnil;
for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--)
Vcoding_category_list
- = Fcons (coding_category_table[i], Vcoding_category_list);
+ = Fcons (XVECTOR (Vcoding_category_table)->contents[i],
+ Vcoding_category_list);
}
DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read,
DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write,
"Specify the coding system for write operations.\n\
-It is useful to bind this variable with `let', but do not set it globally.\n\
-If the value is a coding system, it is used for encoding on write operation.\n\
-If not, an appropriate element is used from one of the coding system alists:\n\
+Programs bind this variable with `let', but you should not set it globally.\n\
+If the value is a coding system, it is used for encoding of output,\n\
+when writing it to a file and when sending it to a file or subprocess.\n\
+\n\
+If this does not specify a coding system, an appropriate element\n\
+is used from one of the coding system alists:\n\
There are three such tables, `file-coding-system-alist',\n\
-`process-coding-system-alist', and `network-coding-system-alist'.");
+`process-coding-system-alist', and `network-coding-system-alist'.\n\
+For output to files, if the above procedure does not specify a coding system,\n\
+the value of `buffer-file-coding-system' is used.");
Vcoding_system_for_write = Qnil;
DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used,
Vlast_coding_system_used = Qnil;
DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion,
- "*Non-nil inhibit code conversion of end-of-line format in any cases.");
+ "*Non-nil means always inhibit code conversion of end-of-line format.\n\
+See info node `Coding Systems' and info node `Text and Binary' concerning\n\
+such conversion.");
inhibit_eol_conversion = 0;
+ DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system,
+ "Non-nil means process buffer inherits coding system of process output.\n\
+Bind it to t if the process output is to be treated as if it were a file\n\
+read from some filesystem.");
+ inherit_process_coding_system = 0;
+
DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist,
"Alist to decide a coding system to use for a file I/O operation.\n\
The format is ((PATTERN . VAL) ...),\n\
If VAL is a function symbol, the function must return a coding system\n\
or a cons of coding systems which are used as above.\n\
\n\
-See also the function `find-operation-coding-system'.");
+See also the function `find-operation-coding-system'\n\
+and the variable `auto-coding-alist'.");
Vfile_coding_system_alist = Qnil;
DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist,
See also the function `find-operation-coding-system'.");
Vnetwork_coding_system_alist = Qnil;
- DEFVAR_INT ("eol-mnemonic-unix", &eol_mnemonic_unix,
- "Mnemonic character indicating UNIX-like end-of-line format (i.e. LF) .");
- eol_mnemonic_unix = ':';
+ DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system,
+ "Coding system to use with system messages.");
+ Vlocale_coding_system = Qnil;
+
+ /* The eol mnemonics are reset in startup.el system-dependently. */
+ DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix,
+ "*String displayed in mode line for UNIX-like (LF) end-of-line format.");
+ eol_mnemonic_unix = build_string (":");
- DEFVAR_INT ("eol-mnemonic-dos", &eol_mnemonic_dos,
- "Mnemonic character indicating DOS-like end-of-line format (i.e. CRLF).");
- eol_mnemonic_dos = '\\';
+ DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos,
+ "*String displayed in mode line for DOS-like (CRLF) end-of-line format.");
+ eol_mnemonic_dos = build_string ("\\");
- DEFVAR_INT ("eol-mnemonic-mac", &eol_mnemonic_mac,
- "Mnemonic character indicating MAC-like end-of-line format (i.e. CR).");
- eol_mnemonic_mac = '/';
+ DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac,
+ "*String displayed in mode line for MAC-like (CR) end-of-line format.");
+ eol_mnemonic_mac = build_string ("/");
- DEFVAR_INT ("eol-mnemonic-undecided", &eol_mnemonic_undecided,
- "Mnemonic character indicating end-of-line format is not yet decided.");
- eol_mnemonic_undecided = ':';
+ DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided,
+ "*String displayed in mode line when end-of-line format is not yet determined.");
+ eol_mnemonic_undecided = build_string (":");
- DEFVAR_LISP ("enable-character-unification", &Venable_character_unification,
- "Non-nil means ISO 2022 encoder/decoder do character unification.");
- Venable_character_unification = Qt;
+ DEFVAR_LISP ("enable-character-translation", &Venable_character_translation,
+ "*Non-nil enables character translation while encoding and decoding.");
+ Venable_character_translation = Qt;
- DEFVAR_LISP ("standard-character-unification-table-for-decode",
- &Vstandard_character_unification_table_for_decode,
- "Table for unifying characters when reading.");
- Vstandard_character_unification_table_for_decode = Qnil;
+ DEFVAR_LISP ("standard-translation-table-for-decode",
+ &Vstandard_translation_table_for_decode,
+ "Table for translating characters while decoding.");
+ Vstandard_translation_table_for_decode = Qnil;
- DEFVAR_LISP ("standard-character-unification-table-for-encode",
- &Vstandard_character_unification_table_for_encode,
- "Table for unifying characters when writing.");
- Vstandard_character_unification_table_for_encode = Qnil;
+ DEFVAR_LISP ("standard-translation-table-for-encode",
+ &Vstandard_translation_table_for_encode,
+ "Table for translationg characters while encoding.");
+ Vstandard_translation_table_for_encode = Qnil;
DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist,
"Alist of charsets vs revision numbers.\n\
or reading output of a subprocess.\n\
Only 128th through 159th elements has a meaning.");
Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil);
+
+ DEFVAR_LISP ("select-safe-coding-system-function",
+ &Vselect_safe_coding_system_function,
+ "Function to call to select safe coding system for encoding a text.\n\
+\n\
+If set, this function is called to force a user to select a proper\n\
+coding system which can encode the text in the case that a default\n\
+coding system used in each operation can't encode the text.\n\
+\n\
+The default value is `select-safe-coding-system' (which see).");
+ Vselect_safe_coding_system_function = Qnil;
+
+}
+
+char *
+emacs_strerror (error_number)
+ int error_number;
+{
+ char *str;
+
+ synchronize_system_messages_locale ();
+ str = strerror (error_number);
+
+ if (! NILP (Vlocale_coding_system))
+ {
+ Lisp_Object dec = code_convert_string_norecord (build_string (str),
+ Vlocale_coding_system,
+ 0);
+ str = (char *) XSTRING (dec)->data;
+ }
+
+ return str;
}
#endif /* emacs */
+
HCoop / bpt / emacs.git / blobdiff