1 /* Code conversion functions.
2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
3 Copyright (C) 1995 Sun Microsystems, Inc.
4 Copyright (C) 1999,2000,2001,2002 MORIOKA Tomohiko
6 This file is part of XEmacs.
8 XEmacs is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with XEmacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Synched up with: Mule 2.3. Not in FSF. */
25 /* Rewritten by Ben Wing <ben@xemacs.org>. */
26 /* Rewritten by MORIOKA Tomohiko <tomo@m17n.org> for XEmacs UTF-2000. */
40 #include "file-coding.h"
42 Lisp_Object Qcoding_system_error;
44 Lisp_Object Vkeyboard_coding_system;
45 Lisp_Object Vterminal_coding_system;
46 Lisp_Object Vcoding_system_for_read;
47 Lisp_Object Vcoding_system_for_write;
48 Lisp_Object Vfile_name_coding_system;
50 Lisp_Object Vcoded_charset_entity_reference_alist;
52 /* Table of symbols identifying each coding category. */
53 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST];
57 struct file_coding_dump {
58 /* Coding system currently associated with each coding category. */
59 Lisp_Object coding_category_system[CODING_CATEGORY_LAST];
61 /* Table of all coding categories in decreasing order of priority.
62 This describes a permutation of the possible coding categories. */
63 int coding_category_by_priority[CODING_CATEGORY_LAST];
65 #if defined(MULE) && !defined(UTF2000)
66 Lisp_Object ucs_to_mule_table[65536];
70 static const struct lrecord_description fcd_description_1[] = {
71 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST },
72 #if defined(MULE) && !defined(UTF2000)
73 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, ucs_to_mule_table), countof (fcd->ucs_to_mule_table) },
78 static const struct struct_description fcd_description = {
79 sizeof (struct file_coding_dump),
83 Lisp_Object mule_to_ucs_table;
85 Lisp_Object Qcoding_systemp;
87 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
88 /* Qinternal in general.c */
90 Lisp_Object Qmnemonic, Qeol_type;
91 Lisp_Object Qcr, Qcrlf, Qlf;
92 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
93 Lisp_Object Qpost_read_conversion;
94 Lisp_Object Qpre_write_conversion;
97 Lisp_Object Qucs4, Qutf8;
98 Lisp_Object Qbig5, Qshift_jis;
99 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
100 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
101 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
102 Lisp_Object Qno_iso6429;
103 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
104 Lisp_Object Qescape_quoted;
105 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
108 Lisp_Object Qdisable_composition;
109 Lisp_Object Quse_entity_reference;
110 Lisp_Object Qd, Qx, QX;
112 Lisp_Object Qencode, Qdecode;
114 Lisp_Object Vcoding_system_hash_table;
116 int enable_multibyte_characters;
119 /* Additional information used by the ISO2022 decoder and detector. */
120 struct iso2022_decoder
122 /* CHARSET holds the character sets currently assigned to the G0
123 through G3 variables. It is initialized from the array
124 INITIAL_CHARSET in CODESYS. */
125 Lisp_Object charset[4];
127 /* Which registers are currently invoked into the left (GL) and
128 right (GR) halves of the 8-bit encoding space? */
129 int register_left, register_right;
131 /* ISO_ESC holds a value indicating part of an escape sequence
132 that has already been seen. */
133 enum iso_esc_flag esc;
135 /* This records the bytes we've seen so far in an escape sequence,
136 in case the sequence is invalid (we spit out the bytes unchanged). */
137 unsigned char esc_bytes[8];
139 /* Index for next byte to store in ISO escape sequence. */
142 #ifdef ENABLE_COMPOSITE_CHARS
143 /* Stuff seen so far when composing a string. */
144 unsigned_char_dynarr *composite_chars;
147 /* If we saw an invalid designation sequence for a particular
148 register, we flag it here and switch to ASCII. The next time we
149 see a valid designation for this register, we turn off the flag
150 and do the designation normally, but pretend the sequence was
151 invalid. The effect of all this is that (most of the time) the
152 escape sequences for both the switch to the unknown charset, and
153 the switch back to the known charset, get inserted literally into
154 the buffer and saved out as such. The hope is that we can
155 preserve the escape sequences so that the resulting written out
156 file makes sense. If we don't do any of this, the designation
157 to the invalid charset will be preserved but that switch back
158 to the known charset will probably get eaten because it was
159 the same charset that was already present in the register. */
160 unsigned char invalid_designated[4];
162 /* We try to do similar things as above for direction-switching
163 sequences. If we encountered a direction switch while an
164 invalid designation was present, or an invalid designation
165 just after a direction switch (i.e. no valid designation
166 encountered yet), we insert the direction-switch escape
167 sequence literally into the output stream, and later on
168 insert the corresponding direction-restoring escape sequence
170 unsigned int switched_dir_and_no_valid_charset_yet :1;
171 unsigned int invalid_switch_dir :1;
173 /* Tells the decoder to output the escape sequence literally
174 even though it was valid. Used in the games we play to
175 avoid lossage when we encounter invalid designations. */
176 unsigned int output_literally :1;
177 /* We encountered a direction switch followed by an invalid
178 designation. We didn't output the direction switch
179 literally because we didn't know about the invalid designation;
180 but we have to do so now. */
181 unsigned int output_direction_sequence :1;
184 EXFUN (Fcopy_coding_system, 2);
186 struct detection_state;
189 text_encode_generic (Lstream *encoding, const Bufbyte *src,
190 unsigned_char_dynarr *dst, size_t n);
192 static int detect_coding_sjis (struct detection_state *st,
193 const Extbyte *src, size_t n);
194 static void decode_coding_sjis (Lstream *decoding, const Extbyte *src,
195 unsigned_char_dynarr *dst, size_t n);
196 void char_encode_shift_jis (struct encoding_stream *str, Emchar c,
197 unsigned_char_dynarr *dst, unsigned int *flags);
198 void char_finish_shift_jis (struct encoding_stream *str,
199 unsigned_char_dynarr *dst, unsigned int *flags);
201 static int detect_coding_big5 (struct detection_state *st,
202 const Extbyte *src, size_t n);
203 static void decode_coding_big5 (Lstream *decoding, const Extbyte *src,
204 unsigned_char_dynarr *dst, size_t n);
205 void char_encode_big5 (struct encoding_stream *str, Emchar c,
206 unsigned_char_dynarr *dst, unsigned int *flags);
207 void char_finish_big5 (struct encoding_stream *str,
208 unsigned_char_dynarr *dst, unsigned int *flags);
210 static int detect_coding_ucs4 (struct detection_state *st,
211 const Extbyte *src, size_t n);
212 static void decode_coding_ucs4 (Lstream *decoding, const Extbyte *src,
213 unsigned_char_dynarr *dst, size_t n);
214 void char_encode_ucs4 (struct encoding_stream *str, Emchar c,
215 unsigned_char_dynarr *dst, unsigned int *flags);
216 void char_finish_ucs4 (struct encoding_stream *str,
217 unsigned_char_dynarr *dst, unsigned int *flags);
219 static int detect_coding_utf8 (struct detection_state *st,
220 const Extbyte *src, size_t n);
221 static void decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
222 unsigned_char_dynarr *dst, size_t n);
223 void char_encode_utf8 (struct encoding_stream *str, Emchar c,
224 unsigned_char_dynarr *dst, unsigned int *flags);
225 void char_finish_utf8 (struct encoding_stream *str,
226 unsigned_char_dynarr *dst, unsigned int *flags);
228 static int postprocess_iso2022_mask (int mask);
229 static void reset_iso2022 (Lisp_Object coding_system,
230 struct iso2022_decoder *iso);
231 static int detect_coding_iso2022 (struct detection_state *st,
232 const Extbyte *src, size_t n);
233 static void decode_coding_iso2022 (Lstream *decoding, const Extbyte *src,
234 unsigned_char_dynarr *dst, size_t n);
235 void char_encode_iso2022 (struct encoding_stream *str, Emchar c,
236 unsigned_char_dynarr *dst, unsigned int *flags);
237 void char_finish_iso2022 (struct encoding_stream *str,
238 unsigned_char_dynarr *dst, unsigned int *flags);
240 static void decode_coding_no_conversion (Lstream *decoding, const Extbyte *src,
241 unsigned_char_dynarr *dst, size_t n);
242 static void encode_coding_no_conversion (Lstream *encoding, const Bufbyte *src,
243 unsigned_char_dynarr *dst, size_t n);
244 static void mule_decode (Lstream *decoding, const Extbyte *src,
245 unsigned_char_dynarr *dst, size_t n);
246 static void mule_encode (Lstream *encoding, const Bufbyte *src,
247 unsigned_char_dynarr *dst, size_t n);
249 typedef struct codesys_prop codesys_prop;
258 Dynarr_declare (codesys_prop);
259 } codesys_prop_dynarr;
261 static const struct lrecord_description codesys_prop_description_1[] = {
262 { XD_LISP_OBJECT, offsetof (codesys_prop, sym) },
266 static const struct struct_description codesys_prop_description = {
267 sizeof (codesys_prop),
268 codesys_prop_description_1
271 static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
272 XD_DYNARR_DESC (codesys_prop_dynarr, &codesys_prop_description),
276 static const struct struct_description codesys_prop_dynarr_description = {
277 sizeof (codesys_prop_dynarr),
278 codesys_prop_dynarr_description_1
281 codesys_prop_dynarr *the_codesys_prop_dynarr;
283 enum codesys_prop_enum
286 CODESYS_PROP_ISO2022,
291 /************************************************************************/
292 /* Coding system functions */
293 /************************************************************************/
295 static Lisp_Object mark_coding_system (Lisp_Object);
296 static void print_coding_system (Lisp_Object, Lisp_Object, int);
297 static void finalize_coding_system (void *header, int for_disksave);
300 static const struct lrecord_description ccs_description_1[] = {
301 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, from_charset) },
302 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, to_charset) },
306 static const struct struct_description ccs_description = {
307 sizeof (charset_conversion_spec),
311 static const struct lrecord_description ccsd_description_1[] = {
312 XD_DYNARR_DESC (charset_conversion_spec_dynarr, &ccs_description),
316 static const struct struct_description ccsd_description = {
317 sizeof (charset_conversion_spec_dynarr),
322 static const struct lrecord_description coding_system_description[] = {
323 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
324 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, doc_string) },
325 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
326 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
327 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
328 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_lf) },
329 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_crlf) },
330 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_cr) },
332 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, iso2022.initial_charset), 4 },
333 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
334 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
335 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.decode) },
336 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.encode) },
338 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccs_priority_list) },
344 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
345 mark_coding_system, print_coding_system,
346 finalize_coding_system,
347 0, 0, coding_system_description,
351 mark_coding_system (Lisp_Object obj)
353 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
355 mark_object (CODING_SYSTEM_NAME (codesys));
356 mark_object (CODING_SYSTEM_DOC_STRING (codesys));
357 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
358 mark_object (CODING_SYSTEM_EOL_LF (codesys));
359 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
360 mark_object (CODING_SYSTEM_EOL_CR (codesys));
362 switch (CODING_SYSTEM_TYPE (codesys))
366 case CODESYS_ISO2022:
367 for (i = 0; i < 4; i++)
368 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
369 if (codesys->iso2022.input_conv)
371 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
373 struct charset_conversion_spec *ccs =
374 Dynarr_atp (codesys->iso2022.input_conv, i);
375 mark_object (ccs->from_charset);
376 mark_object (ccs->to_charset);
379 if (codesys->iso2022.output_conv)
381 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
383 struct charset_conversion_spec *ccs =
384 Dynarr_atp (codesys->iso2022.output_conv, i);
385 mark_object (ccs->from_charset);
386 mark_object (ccs->to_charset);
393 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 0));
394 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 1));
399 mark_object (CODING_SYSTEM_CCL_DECODE (codesys));
400 mark_object (CODING_SYSTEM_CCL_ENCODE (codesys));
407 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
409 mark_object (CODING_SYSTEM_CCS_PRIORITY_LIST (codesys));
411 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
415 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
418 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
420 error ("printing unreadable object #<coding_system 0x%x>",
423 write_c_string ("#<coding_system ", printcharfun);
424 print_internal (c->name, printcharfun, 1);
425 write_c_string (">", printcharfun);
429 finalize_coding_system (void *header, int for_disksave)
431 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
432 /* Since coding systems never go away, this function is not
433 necessary. But it would be necessary if we changed things
434 so that coding systems could go away. */
435 if (!for_disksave) /* see comment in lstream.c */
437 switch (CODING_SYSTEM_TYPE (c))
440 case CODESYS_ISO2022:
441 if (c->iso2022.input_conv)
443 Dynarr_free (c->iso2022.input_conv);
444 c->iso2022.input_conv = 0;
446 if (c->iso2022.output_conv)
448 Dynarr_free (c->iso2022.output_conv);
449 c->iso2022.output_conv = 0;
460 symbol_to_eol_type (Lisp_Object symbol)
462 CHECK_SYMBOL (symbol);
463 if (NILP (symbol)) return EOL_AUTODETECT;
464 if (EQ (symbol, Qlf)) return EOL_LF;
465 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
466 if (EQ (symbol, Qcr)) return EOL_CR;
468 signal_simple_error ("Unrecognized eol type", symbol);
469 return EOL_AUTODETECT; /* not reached */
473 eol_type_to_symbol (eol_type_t type)
478 case EOL_LF: return Qlf;
479 case EOL_CRLF: return Qcrlf;
480 case EOL_CR: return Qcr;
481 case EOL_AUTODETECT: return Qnil;
486 setup_eol_coding_systems (Lisp_Coding_System *codesys)
488 Lisp_Object codesys_obj;
489 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
490 char *codesys_name = (char *) alloca (len + 7);
492 char *codesys_mnemonic=0;
494 Lisp_Object codesys_name_sym, sub_codesys_obj;
498 XSETCODING_SYSTEM (codesys_obj, codesys);
500 memcpy (codesys_name,
501 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
503 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
505 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
506 codesys_mnemonic = (char *) alloca (mlen + 7);
507 memcpy (codesys_mnemonic,
508 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
511 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
512 strcpy (codesys_name + len, "-" op_sys); \
514 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
515 codesys_name_sym = intern (codesys_name); \
516 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
517 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
519 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
520 build_string (codesys_mnemonic); \
521 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
524 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
525 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
526 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
529 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
530 Return t if OBJECT is a coding system.
531 A coding system is an object that defines how text containing multiple
532 character sets is encoded into a stream of (typically 8-bit) bytes.
533 The coding system is used to decode the stream into a series of
534 characters (which may be from multiple charsets) when the text is read
535 from a file or process, and is used to encode the text back into the
536 same format when it is written out to a file or process.
538 For example, many ISO2022-compliant coding systems (such as Compound
539 Text, which is used for inter-client data under the X Window System)
540 use escape sequences to switch between different charsets -- Japanese
541 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
542 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
543 `make-coding-system' for more information.
545 Coding systems are normally identified using a symbol, and the
546 symbol is accepted in place of the actual coding system object whenever
547 a coding system is called for. (This is similar to how faces work.)
551 return CODING_SYSTEMP (object) ? Qt : Qnil;
554 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
555 Retrieve the coding system of the given name.
557 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
558 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
559 If there is no such coding system, nil is returned. Otherwise the
560 associated coding system object is returned.
562 (coding_system_or_name))
564 if (NILP (coding_system_or_name))
565 coding_system_or_name = Qbinary;
566 else if (CODING_SYSTEMP (coding_system_or_name))
567 return coding_system_or_name;
569 CHECK_SYMBOL (coding_system_or_name);
573 coding_system_or_name =
574 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
576 if (CODING_SYSTEMP (coding_system_or_name) || NILP (coding_system_or_name))
577 return coding_system_or_name;
581 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
582 Retrieve the coding system of the given name.
583 Same as `find-coding-system' except that if there is no such
584 coding system, an error is signaled instead of returning nil.
588 Lisp_Object coding_system = Ffind_coding_system (name);
590 if (NILP (coding_system))
591 signal_simple_error ("No such coding system", name);
592 return coding_system;
595 /* We store the coding systems in hash tables with the names as the key and the
596 actual coding system object as the value. Occasionally we need to use them
597 in a list format. These routines provide us with that. */
598 struct coding_system_list_closure
600 Lisp_Object *coding_system_list;
604 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
605 void *coding_system_list_closure)
607 /* This function can GC */
608 struct coding_system_list_closure *cscl =
609 (struct coding_system_list_closure *) coding_system_list_closure;
610 Lisp_Object *coding_system_list = cscl->coding_system_list;
612 *coding_system_list = Fcons (key, *coding_system_list);
616 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
617 Return a list of the names of all defined coding systems.
621 Lisp_Object coding_system_list = Qnil;
623 struct coding_system_list_closure coding_system_list_closure;
625 GCPRO1 (coding_system_list);
626 coding_system_list_closure.coding_system_list = &coding_system_list;
627 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
628 &coding_system_list_closure);
631 return coding_system_list;
634 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
635 Return the name of the given coding system.
639 coding_system = Fget_coding_system (coding_system);
640 return XCODING_SYSTEM_NAME (coding_system);
643 static Lisp_Coding_System *
644 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
646 Lisp_Coding_System *codesys =
647 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
649 zero_lcrecord (codesys);
650 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
651 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
652 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
653 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
654 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
655 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
656 CODING_SYSTEM_TYPE (codesys) = type;
657 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
660 CODING_SYSTEM_CCS_PRIORITY_LIST (codesys) = Qnil;
662 if (type == CODESYS_ISO2022)
665 for (i = 0; i < 4; i++)
666 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
669 if (type == CODESYS_BIG5)
671 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 0)
673 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 1)
674 = Vcharset_chinese_big5;
675 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 2)
677 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, 3)
681 else if (type == CODESYS_CCL)
683 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
684 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
687 CODING_SYSTEM_NAME (codesys) = name;
693 /* Given a list of charset conversion specs as specified in a Lisp
694 program, parse it into STORE_HERE. */
697 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
698 Lisp_Object spec_list)
702 EXTERNAL_LIST_LOOP (rest, spec_list)
704 Lisp_Object car = XCAR (rest);
705 Lisp_Object from, to;
706 struct charset_conversion_spec spec;
708 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
709 signal_simple_error ("Invalid charset conversion spec", car);
710 from = Fget_charset (XCAR (car));
711 to = Fget_charset (XCAR (XCDR (car)));
712 if ( (XCHARSET_CHARS (from) != XCHARSET_CHARS (to)) ||
713 (XCHARSET_DIMENSION (from) != XCHARSET_DIMENSION (to)) )
714 signal_simple_error_2
715 ("Attempted conversion between different charset types",
717 spec.from_charset = from;
718 spec.to_charset = to;
720 Dynarr_add (store_here, spec);
724 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
725 specs, return the equivalent as the Lisp programmer would see it.
727 If LOAD_HERE is 0, return Qnil. */
730 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
737 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
739 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
740 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
743 return Fnreverse (result);
748 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
749 Register symbol NAME as a coding system.
751 TYPE describes the conversion method used and should be one of
754 Automatic conversion. XEmacs attempts to detect the coding system
757 No conversion. Use this for binary files and such. On output,
758 graphic characters that are not in ASCII or Latin-1 will be
759 replaced by a ?. (For a no-conversion-encoded buffer, these
760 characters will only be present if you explicitly insert them.)
762 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
764 ISO 10646 UCS-4 encoding.
766 ISO 10646 UTF-8 encoding.
768 Any ISO2022-compliant encoding. Among other things, this includes
769 JIS (the Japanese encoding commonly used for e-mail), EUC (the
770 standard Unix encoding for Japanese and other languages), and
771 Compound Text (the encoding used in X11). You can specify more
772 specific information about the conversion with the PROPS argument.
774 Big5 (the encoding commonly used for Taiwanese).
776 The conversion is performed using a user-written pseudo-code
777 program. CCL (Code Conversion Language) is the name of this
780 Write out or read in the raw contents of the memory representing
781 the buffer's text. This is primarily useful for debugging
782 purposes, and is only enabled when XEmacs has been compiled with
783 DEBUG_XEMACS defined (via the --debug configure option).
784 WARNING: Reading in a file using 'internal conversion can result
785 in an internal inconsistency in the memory representing a
786 buffer's text, which will produce unpredictable results and may
787 cause XEmacs to crash. Under normal circumstances you should
788 never use 'internal conversion.
790 DOC-STRING is a string describing the coding system.
792 PROPS is a property list, describing the specific nature of the
793 character set. Recognized properties are:
796 String to be displayed in the modeline when this coding system is
800 End-of-line conversion to be used. It should be one of
803 Automatically detect the end-of-line type (LF, CRLF,
804 or CR). Also generate subsidiary coding systems named
805 `NAME-unix', `NAME-dos', and `NAME-mac', that are
806 identical to this coding system but have an EOL-TYPE
807 value of 'lf, 'crlf, and 'cr, respectively.
809 The end of a line is marked externally using ASCII LF.
810 Since this is also the way that XEmacs represents an
811 end-of-line internally, specifying this option results
812 in no end-of-line conversion. This is the standard
813 format for Unix text files.
815 The end of a line is marked externally using ASCII
816 CRLF. This is the standard format for MS-DOS text
819 The end of a line is marked externally using ASCII CR.
820 This is the standard format for Macintosh text files.
822 Automatically detect the end-of-line type but do not
823 generate subsidiary coding systems. (This value is
824 converted to nil when stored internally, and
825 `coding-system-property' will return nil.)
828 If non-nil, composition/decomposition for combining characters
831 'use-entity-reference
832 If non-nil, SGML style entity-reference is used for non-system-characters.
834 'post-read-conversion
835 Function called after a file has been read in, to perform the
836 decoding. Called with two arguments, START and END, denoting
837 a region of the current buffer to be decoded.
839 'pre-write-conversion
840 Function called before a file is written out, to perform the
841 encoding. Called with two arguments, START and END, denoting
842 a region of the current buffer to be encoded.
845 The following additional properties are recognized if TYPE is 'iso2022:
851 The character set initially designated to the G0 - G3 registers.
852 The value should be one of
854 -- A charset object (designate that character set)
855 -- nil (do not ever use this register)
856 -- t (no character set is initially designated to
857 the register, but may be later on; this automatically
858 sets the corresponding `force-g*-on-output' property)
864 If non-nil, send an explicit designation sequence on output before
865 using the specified register.
868 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
869 "ESC $ B" on output in place of the full designation sequences
870 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
873 If non-nil, don't designate ASCII to G0 at each end of line on output.
874 Setting this to non-nil also suppresses other state-resetting that
875 normally happens at the end of a line.
878 If non-nil, don't designate ASCII to G0 before control chars on output.
881 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
885 If non-nil, use locking-shift (SO/SI) instead of single-shift
886 or designation by escape sequence.
889 If non-nil, don't use ISO6429's direction specification.
892 If non-nil, literal control characters that are the same as
893 the beginning of a recognized ISO2022 or ISO6429 escape sequence
894 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
895 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
896 so that they can be properly distinguished from an escape sequence.
897 (Note that doing this results in a non-portable encoding.) This
898 encoding flag is used for byte-compiled files. Note that ESC
899 is a good choice for a quoting character because there are no
900 escape sequences whose second byte is a character from the Control-0
901 or Control-1 character sets; this is explicitly disallowed by the
904 'input-charset-conversion
905 A list of conversion specifications, specifying conversion of
906 characters in one charset to another when decoding is performed.
907 Each specification is a list of two elements: the source charset,
908 and the destination charset.
910 'output-charset-conversion
911 A list of conversion specifications, specifying conversion of
912 characters in one charset to another when encoding is performed.
913 The form of each specification is the same as for
914 'input-charset-conversion.
917 The following additional properties are recognized (and required)
921 CCL program used for decoding (converting to internal format).
924 CCL program used for encoding (converting to external format).
926 (name, type, doc_string, props))
928 Lisp_Coding_System *codesys;
929 enum coding_system_type ty;
930 int need_to_setup_eol_systems = 1;
932 /* Convert type to constant */
933 if (NILP (type) || EQ (type, Qundecided))
934 { ty = CODESYS_AUTODETECT; }
936 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
937 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
938 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
939 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
940 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
941 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
943 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
945 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
948 signal_simple_error ("Invalid coding system type", type);
952 codesys = allocate_coding_system (ty, name);
954 if (NILP (doc_string))
955 doc_string = build_string ("");
957 CHECK_STRING (doc_string);
958 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
961 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props)
963 if (EQ (key, Qmnemonic))
966 CHECK_STRING (value);
967 CODING_SYSTEM_MNEMONIC (codesys) = value;
970 else if (EQ (key, Qeol_type))
972 need_to_setup_eol_systems = NILP (value);
975 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
978 else if (EQ (key, Qpost_read_conversion))
979 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
980 else if (EQ (key, Qpre_write_conversion))
981 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
983 else if (EQ (key, Qdisable_composition))
984 CODING_SYSTEM_DISABLE_COMPOSITION (codesys) = !NILP (value);
985 else if (EQ (key, Quse_entity_reference))
986 CODING_SYSTEM_USE_ENTITY_REFERENCE (codesys) = !NILP (value);
989 else if (ty == CODESYS_ISO2022)
991 #define FROB_INITIAL_CHARSET(charset_num) \
992 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
993 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
995 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
996 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
997 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
998 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
1000 #define FROB_FORCE_CHARSET(charset_num) \
1001 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
1003 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
1004 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
1005 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
1006 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
1008 #define FROB_BOOLEAN_PROPERTY(prop) \
1009 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
1011 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
1012 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
1013 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
1014 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
1015 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
1016 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
1017 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
1019 else if (EQ (key, Qinput_charset_conversion))
1021 codesys->iso2022.input_conv =
1022 Dynarr_new (charset_conversion_spec);
1023 parse_charset_conversion_specs (codesys->iso2022.input_conv,
1026 else if (EQ (key, Qoutput_charset_conversion))
1028 codesys->iso2022.output_conv =
1029 Dynarr_new (charset_conversion_spec);
1030 parse_charset_conversion_specs (codesys->iso2022.output_conv,
1034 signal_simple_error ("Unrecognized property", key);
1037 else if (ty == CODESYS_BIG5)
1039 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
1040 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
1042 signal_simple_error ("Unrecognized property", key);
1045 else if (EQ (type, Qccl))
1048 struct ccl_program test_ccl;
1051 /* Check key first. */
1052 if (EQ (key, Qdecode))
1053 suffix = "-ccl-decode";
1054 else if (EQ (key, Qencode))
1055 suffix = "-ccl-encode";
1057 signal_simple_error ("Unrecognized property", key);
1059 /* If value is vector, register it as a ccl program
1060 associated with an newly created symbol for
1061 backward compatibility. */
1062 if (VECTORP (value))
1064 sym = Fintern (concat2 (Fsymbol_name (name),
1065 build_string (suffix)),
1067 Fregister_ccl_program (sym, value);
1071 CHECK_SYMBOL (value);
1074 /* check if the given ccl programs are valid. */
1075 if (setup_ccl_program (&test_ccl, sym) < 0)
1076 signal_simple_error ("Invalid CCL program", value);
1078 if (EQ (key, Qdecode))
1079 CODING_SYSTEM_CCL_DECODE (codesys) = sym;
1080 else if (EQ (key, Qencode))
1081 CODING_SYSTEM_CCL_ENCODE (codesys) = sym;
1086 signal_simple_error ("Unrecognized property", key);
1090 if (need_to_setup_eol_systems)
1091 setup_eol_coding_systems (codesys);
1094 Lisp_Object codesys_obj;
1095 XSETCODING_SYSTEM (codesys_obj, codesys);
1096 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
1101 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
1102 Copy OLD-CODING-SYSTEM to NEW-NAME.
1103 If NEW-NAME does not name an existing coding system, a new one will
1106 (old_coding_system, new_name))
1108 Lisp_Object new_coding_system;
1109 old_coding_system = Fget_coding_system (old_coding_system);
1110 new_coding_system = Ffind_coding_system (new_name);
1111 if (NILP (new_coding_system))
1113 XSETCODING_SYSTEM (new_coding_system,
1114 allocate_coding_system
1115 (XCODING_SYSTEM_TYPE (old_coding_system),
1117 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
1121 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
1122 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
1123 memcpy (((char *) to ) + sizeof (to->header),
1124 ((char *) from) + sizeof (from->header),
1125 sizeof (*from) - sizeof (from->header));
1126 to->name = new_name;
1128 return new_coding_system;
1131 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, 1, 1, 0, /*
1132 Return t if OBJECT names a coding system, and is not a coding system alias.
1136 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
1140 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
1141 Return t if OBJECT is a coding system alias.
1142 All coding system aliases are created by `define-coding-system-alias'.
1146 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
1150 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
1151 Return the coding-system symbol for which symbol ALIAS is an alias.
1155 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
1156 if (SYMBOLP (aliasee))
1159 signal_simple_error ("Symbol is not a coding system alias", alias);
1160 return Qnil; /* To keep the compiler happy */
1164 append_suffix_to_symbol (Lisp_Object symbol, const char *ascii_string)
1166 return Fintern (concat2 (Fsymbol_name (symbol), build_string (ascii_string)),
1170 /* A maphash function, for removing dangling coding system aliases. */
1172 dangling_coding_system_alias_p (Lisp_Object alias,
1173 Lisp_Object aliasee,
1174 void *dangling_aliases)
1176 if (SYMBOLP (aliasee)
1177 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
1179 (*(int *) dangling_aliases)++;
1186 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
1187 Define symbol ALIAS as an alias for coding system ALIASEE.
1189 You can use this function to redefine an alias that has already been defined,
1190 but you cannot redefine a name which is the canonical name for a coding system.
1191 \(a canonical name of a coding system is what is returned when you call
1192 `coding-system-name' on a coding system).
1194 ALIASEE itself can be an alias, which allows you to define nested aliases.
1196 You are forbidden, however, from creating alias loops or `dangling' aliases.
1197 These will be detected, and an error will be signaled if you attempt to do so.
1199 If ALIASEE is nil, then ALIAS will simply be undefined.
1201 See also `coding-system-alias-p', `coding-system-aliasee',
1202 and `coding-system-canonical-name-p'.
1206 Lisp_Object real_coding_system, probe;
1208 CHECK_SYMBOL (alias);
1210 if (!NILP (Fcoding_system_canonical_name_p (alias)))
1212 ("Symbol is the canonical name of a coding system and cannot be redefined",
1217 Lisp_Object subsidiary_unix = append_suffix_to_symbol (alias, "-unix");
1218 Lisp_Object subsidiary_dos = append_suffix_to_symbol (alias, "-dos");
1219 Lisp_Object subsidiary_mac = append_suffix_to_symbol (alias, "-mac");
1221 Fremhash (alias, Vcoding_system_hash_table);
1223 /* Undefine subsidiary aliases,
1224 presumably created by a previous call to this function */
1225 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
1226 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
1227 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
1229 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
1230 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
1231 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
1234 /* Undefine dangling coding system aliases. */
1236 int dangling_aliases;
1239 dangling_aliases = 0;
1240 elisp_map_remhash (dangling_coding_system_alias_p,
1241 Vcoding_system_hash_table,
1243 } while (dangling_aliases > 0);
1249 if (CODING_SYSTEMP (aliasee))
1250 aliasee = XCODING_SYSTEM_NAME (aliasee);
1252 /* Checks that aliasee names a coding-system */
1253 real_coding_system = Fget_coding_system (aliasee);
1255 /* Check for coding system alias loops */
1256 if (EQ (alias, aliasee))
1257 alias_loop: signal_simple_error_2
1258 ("Attempt to create a coding system alias loop", alias, aliasee);
1260 for (probe = aliasee;
1262 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
1264 if (EQ (probe, alias))
1268 Fputhash (alias, aliasee, Vcoding_system_hash_table);
1270 /* Set up aliases for subsidiaries.
1271 #### There must be a better way to handle subsidiary coding systems. */
1273 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
1275 for (i = 0; i < countof (suffixes); i++)
1277 Lisp_Object alias_subsidiary =
1278 append_suffix_to_symbol (alias, suffixes[i]);
1279 Lisp_Object aliasee_subsidiary =
1280 append_suffix_to_symbol (aliasee, suffixes[i]);
1282 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
1283 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
1286 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
1287 but it doesn't look intentional, so I'd rather return something
1288 meaningful or nothing at all. */
1293 subsidiary_coding_system (Lisp_Object coding_system, eol_type_t type)
1295 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
1296 Lisp_Object new_coding_system;
1298 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
1299 return coding_system;
1303 case EOL_AUTODETECT: return coding_system;
1304 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
1305 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
1306 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
1307 default: abort (); return Qnil;
1310 return NILP (new_coding_system) ? coding_system : new_coding_system;
1313 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
1314 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
1316 (coding_system, eol_type))
1318 coding_system = Fget_coding_system (coding_system);
1320 return subsidiary_coding_system (coding_system,
1321 symbol_to_eol_type (eol_type));
1325 /************************************************************************/
1326 /* Coding system accessors */
1327 /************************************************************************/
1329 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
1330 Return the doc string for CODING-SYSTEM.
1334 coding_system = Fget_coding_system (coding_system);
1335 return XCODING_SYSTEM_DOC_STRING (coding_system);
1338 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
1339 Return the type of CODING-SYSTEM.
1343 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
1346 case CODESYS_AUTODETECT: return Qundecided;
1348 case CODESYS_SHIFT_JIS: return Qshift_jis;
1349 case CODESYS_ISO2022: return Qiso2022;
1350 case CODESYS_BIG5: return Qbig5;
1351 case CODESYS_UCS4: return Qucs4;
1352 case CODESYS_UTF8: return Qutf8;
1353 case CODESYS_CCL: return Qccl;
1355 case CODESYS_NO_CONVERSION: return Qno_conversion;
1357 case CODESYS_INTERNAL: return Qinternal;
1364 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
1367 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
1369 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
1372 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
1373 Return initial charset of CODING-SYSTEM designated to GNUM.
1376 (coding_system, gnum))
1378 coding_system = Fget_coding_system (coding_system);
1381 return coding_system_charset (coding_system, XINT (gnum));
1385 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
1386 Return the PROP property of CODING-SYSTEM.
1388 (coding_system, prop))
1391 enum coding_system_type type;
1393 coding_system = Fget_coding_system (coding_system);
1394 CHECK_SYMBOL (prop);
1395 type = XCODING_SYSTEM_TYPE (coding_system);
1397 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
1398 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
1401 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
1403 case CODESYS_PROP_ALL_OK:
1406 case CODESYS_PROP_ISO2022:
1407 if (type != CODESYS_ISO2022)
1409 ("Property only valid in ISO2022 coding systems",
1413 case CODESYS_PROP_CCL:
1414 if (type != CODESYS_CCL)
1416 ("Property only valid in CCL coding systems",
1426 signal_simple_error ("Unrecognized property", prop);
1428 if (EQ (prop, Qname))
1429 return XCODING_SYSTEM_NAME (coding_system);
1430 else if (EQ (prop, Qtype))
1431 return Fcoding_system_type (coding_system);
1432 else if (EQ (prop, Qdoc_string))
1433 return XCODING_SYSTEM_DOC_STRING (coding_system);
1434 else if (EQ (prop, Qmnemonic))
1435 return XCODING_SYSTEM_MNEMONIC (coding_system);
1436 else if (EQ (prop, Qeol_type))
1437 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
1438 else if (EQ (prop, Qeol_lf))
1439 return XCODING_SYSTEM_EOL_LF (coding_system);
1440 else if (EQ (prop, Qeol_crlf))
1441 return XCODING_SYSTEM_EOL_CRLF (coding_system);
1442 else if (EQ (prop, Qeol_cr))
1443 return XCODING_SYSTEM_EOL_CR (coding_system);
1444 else if (EQ (prop, Qpost_read_conversion))
1445 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
1446 else if (EQ (prop, Qpre_write_conversion))
1447 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
1450 else if (EQ (prop, Qdisable_composition))
1451 return XCODING_SYSTEM_DISABLE_COMPOSITION (coding_system) ? Qt : Qnil;
1452 else if (EQ (prop, Quse_entity_reference))
1453 return XCODING_SYSTEM_USE_ENTITY_REFERENCE (coding_system) ? Qt : Qnil;
1455 else if (type == CODESYS_ISO2022)
1457 if (EQ (prop, Qcharset_g0))
1458 return coding_system_charset (coding_system, 0);
1459 else if (EQ (prop, Qcharset_g1))
1460 return coding_system_charset (coding_system, 1);
1461 else if (EQ (prop, Qcharset_g2))
1462 return coding_system_charset (coding_system, 2);
1463 else if (EQ (prop, Qcharset_g3))
1464 return coding_system_charset (coding_system, 3);
1466 #define FORCE_CHARSET(charset_num) \
1467 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
1468 (coding_system, charset_num) ? Qt : Qnil)
1470 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
1471 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
1472 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
1473 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
1475 #define LISP_BOOLEAN(prop) \
1476 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
1478 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
1479 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
1480 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
1481 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
1482 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
1483 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
1484 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
1486 else if (EQ (prop, Qinput_charset_conversion))
1488 unparse_charset_conversion_specs
1489 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
1490 else if (EQ (prop, Qoutput_charset_conversion))
1492 unparse_charset_conversion_specs
1493 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
1497 else if (type == CODESYS_CCL)
1499 if (EQ (prop, Qdecode))
1500 return XCODING_SYSTEM_CCL_DECODE (coding_system);
1501 else if (EQ (prop, Qencode))
1502 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
1510 return Qnil; /* not reached */
1514 /************************************************************************/
1515 /* Coding category functions */
1516 /************************************************************************/
1519 decode_coding_category (Lisp_Object symbol)
1523 CHECK_SYMBOL (symbol);
1524 for (i = 0; i < CODING_CATEGORY_LAST; i++)
1525 if (EQ (coding_category_symbol[i], symbol))
1528 signal_simple_error ("Unrecognized coding category", symbol);
1529 return 0; /* not reached */
1532 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
1533 Return a list of all recognized coding categories.
1538 Lisp_Object list = Qnil;
1540 for (i = CODING_CATEGORY_LAST - 1; i >= 0; i--)
1541 list = Fcons (coding_category_symbol[i], list);
1545 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
1546 Change the priority order of the coding categories.
1547 LIST should be list of coding categories, in descending order of
1548 priority. Unspecified coding categories will be lower in priority
1549 than all specified ones, in the same relative order they were in
1554 int category_to_priority[CODING_CATEGORY_LAST];
1558 /* First generate a list that maps coding categories to priorities. */
1560 for (i = 0; i < CODING_CATEGORY_LAST; i++)
1561 category_to_priority[i] = -1;
1563 /* Highest priority comes from the specified list. */
1565 EXTERNAL_LIST_LOOP (rest, list)
1567 int cat = decode_coding_category (XCAR (rest));
1569 if (category_to_priority[cat] >= 0)
1570 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
1571 category_to_priority[cat] = i++;
1574 /* Now go through the existing categories by priority to retrieve
1575 the categories not yet specified and preserve their priority
1577 for (j = 0; j < CODING_CATEGORY_LAST; j++)
1579 int cat = fcd->coding_category_by_priority[j];
1580 if (category_to_priority[cat] < 0)
1581 category_to_priority[cat] = i++;
1584 /* Now we need to construct the inverse of the mapping we just
1587 for (i = 0; i < CODING_CATEGORY_LAST; i++)
1588 fcd->coding_category_by_priority[category_to_priority[i]] = i;
1590 /* Phew! That was confusing. */
1594 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
1595 Return a list of coding categories in descending order of priority.
1600 Lisp_Object list = Qnil;
1602 for (i = CODING_CATEGORY_LAST - 1; i >= 0; i--)
1603 list = Fcons (coding_category_symbol[fcd->coding_category_by_priority[i]],
1608 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
1609 Change the coding system associated with a coding category.
1611 (coding_category, coding_system))
1613 int cat = decode_coding_category (coding_category);
1615 coding_system = Fget_coding_system (coding_system);
1616 fcd->coding_category_system[cat] = coding_system;
1620 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
1621 Return the coding system associated with a coding category.
1625 int cat = decode_coding_category (coding_category);
1626 Lisp_Object sys = fcd->coding_category_system[cat];
1629 return XCODING_SYSTEM_NAME (sys);
1634 /************************************************************************/
1635 /* Detecting the encoding of data */
1636 /************************************************************************/
1638 struct detection_state
1640 eol_type_t eol_type;
1676 struct iso2022_decoder iso;
1678 int high_byte_count;
1679 unsigned int saw_single_shift:1;
1692 acceptable_control_char_p (int c)
1696 /* Allow and ignore control characters that you might
1697 reasonably see in a text file */
1702 case 8: /* backspace */
1703 case 11: /* vertical tab */
1704 case 12: /* form feed */
1705 case 26: /* MS-DOS C-z junk */
1706 case 31: /* '^_' -- for info */
1714 mask_has_at_most_one_bit_p (int mask)
1716 /* Perhaps the only thing useful you learn from intensive Microsoft
1717 technical interviews */
1718 return (mask & (mask - 1)) == 0;
1722 detect_eol_type (struct detection_state *st, const Extbyte *src,
1727 unsigned char c = *(unsigned char *)src++;
1730 if (st->eol.just_saw_cr)
1732 else if (st->eol.seen_anything)
1735 else if (st->eol.just_saw_cr)
1738 st->eol.just_saw_cr = 1;
1740 st->eol.just_saw_cr = 0;
1741 st->eol.seen_anything = 1;
1744 return EOL_AUTODETECT;
1747 /* Attempt to determine the encoding and EOL type of the given text.
1748 Before calling this function for the first type, you must initialize
1749 st->eol_type as appropriate and initialize st->mask to ~0.
1751 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
1754 st->mask holds the determined coding category mask, or ~0 if only
1755 ASCII has been seen so far.
1759 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
1760 is present in st->mask
1761 1 == definitive answers are here for both st->eol_type and st->mask
1765 detect_coding_type (struct detection_state *st, const Extbyte *src,
1766 size_t n, int just_do_eol)
1768 if (st->eol_type == EOL_AUTODETECT)
1769 st->eol_type = detect_eol_type (st, src, n);
1772 return st->eol_type != EOL_AUTODETECT;
1774 if (!st->seen_non_ascii)
1776 for (; n; n--, src++)
1778 unsigned char c = *(unsigned char *) src;
1779 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
1781 st->seen_non_ascii = 1;
1783 st->shift_jis.mask = ~0;
1787 st->iso2022.mask = ~0;
1797 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
1798 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
1799 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
1800 st->shift_jis.mask = detect_coding_sjis (st, src, n);
1801 if (!mask_has_at_most_one_bit_p (st->big5.mask))
1802 st->big5.mask = detect_coding_big5 (st, src, n);
1803 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
1804 st->utf8.mask = detect_coding_utf8 (st, src, n);
1805 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
1806 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
1809 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
1810 | st->utf8.mask | st->ucs4.mask;
1813 int retval = mask_has_at_most_one_bit_p (st->mask);
1814 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
1815 return retval && st->eol_type != EOL_AUTODETECT;
1820 coding_system_from_mask (int mask)
1824 /* If the file was entirely or basically ASCII, use the
1825 default value of `buffer-file-coding-system'. */
1826 Lisp_Object retval =
1827 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
1830 retval = Ffind_coding_system (retval);
1834 (Qbad_variable, Qwarning,
1835 "Invalid `default-buffer-file-coding-system', set to nil");
1836 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
1840 retval = Fget_coding_system (Qraw_text);
1848 mask = postprocess_iso2022_mask (mask);
1850 /* Look through the coding categories by priority and find
1851 the first one that is allowed. */
1852 for (i = 0; i < CODING_CATEGORY_LAST; i++)
1854 cat = fcd->coding_category_by_priority[i];
1855 if ((mask & (1 << cat)) &&
1856 !NILP (fcd->coding_category_system[cat]))
1860 return fcd->coding_category_system[cat];
1862 return Fget_coding_system (Qraw_text);
1866 /* Given a seekable read stream and potential coding system and EOL type
1867 as specified, do any autodetection that is called for. If the
1868 coding system and/or EOL type are not `autodetect', they will be left
1869 alone; but this function will never return an autodetect coding system
1872 This function does not automatically fetch subsidiary coding systems;
1873 that should be unnecessary with the explicit eol-type argument. */
1875 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
1878 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
1879 eol_type_t *eol_type_in_out)
1881 struct detection_state decst;
1883 if (*eol_type_in_out == EOL_AUTODETECT)
1884 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
1887 decst.eol_type = *eol_type_in_out;
1890 /* If autodetection is called for, do it now. */
1891 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
1892 || *eol_type_in_out == EOL_AUTODETECT)
1895 Lisp_Object coding_system = Qnil;
1897 ssize_t nread = Lstream_read (stream, buf, sizeof (buf));
1900 /* Look for initial "-*-"; mode line prefix */
1902 scan_end = buf + nread - LENGTH ("-*-coding:?-*-");
1907 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
1909 Extbyte *local_vars_beg = p + 3;
1910 /* Look for final "-*-"; mode line suffix */
1911 for (p = local_vars_beg,
1912 scan_end = buf + nread - LENGTH ("-*-");
1917 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
1919 Extbyte *suffix = p;
1920 /* Look for "coding:" */
1921 for (p = local_vars_beg,
1922 scan_end = suffix - LENGTH ("coding:?");
1925 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
1926 && (p == local_vars_beg
1927 || (*(p-1) == ' ' ||
1933 p += LENGTH ("coding:");
1934 while (*p == ' ' || *p == '\t') p++;
1936 /* Get coding system name */
1937 save = *suffix; *suffix = '\0';
1938 /* Characters valid in a MIME charset name (rfc 1521),
1939 and in a Lisp symbol name. */
1940 n = strspn ( (char *) p,
1941 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1942 "abcdefghijklmnopqrstuvwxyz"
1948 save = p[n]; p[n] = '\0';
1950 Ffind_coding_system (intern ((char *) p));
1960 if (NILP (coding_system))
1963 if (detect_coding_type (&decst, buf, nread,
1964 XCODING_SYSTEM_TYPE (*codesys_in_out)
1965 != CODESYS_AUTODETECT))
1967 nread = Lstream_read (stream, buf, sizeof (buf));
1973 else if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
1974 && XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
1977 if (detect_coding_type (&decst, buf, nread, 1))
1979 nread = Lstream_read (stream, buf, sizeof (buf));
1985 *eol_type_in_out = decst.eol_type;
1986 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
1988 if (NILP (coding_system))
1989 *codesys_in_out = coding_system_from_mask (decst.mask);
1991 *codesys_in_out = coding_system;
1995 /* If we absolutely can't determine the EOL type, just assume LF. */
1996 if (*eol_type_in_out == EOL_AUTODETECT)
1997 *eol_type_in_out = EOL_LF;
1999 Lstream_rewind (stream);
2002 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
2003 Detect coding system of the text in the region between START and END.
2004 Return a list of possible coding systems ordered by priority.
2005 If only ASCII characters are found, return 'undecided or one of
2006 its subsidiary coding systems according to a detected end-of-line
2007 type. Optional arg BUFFER defaults to the current buffer.
2009 (start, end, buffer))
2011 Lisp_Object val = Qnil;
2012 struct buffer *buf = decode_buffer (buffer, 0);
2014 Lisp_Object instream, lb_instream;
2015 Lstream *istr, *lb_istr;
2016 struct detection_state decst;
2017 struct gcpro gcpro1, gcpro2;
2019 get_buffer_range_char (buf, start, end, &b, &e, 0);
2020 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
2021 lb_istr = XLSTREAM (lb_instream);
2022 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
2023 istr = XLSTREAM (instream);
2024 GCPRO2 (instream, lb_instream);
2026 decst.eol_type = EOL_AUTODETECT;
2030 Extbyte random_buffer[4096];
2031 ssize_t nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
2035 if (detect_coding_type (&decst, random_buffer, nread, 0))
2039 if (decst.mask == ~0)
2040 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
2048 decst.mask = postprocess_iso2022_mask (decst.mask);
2050 for (i = CODING_CATEGORY_LAST - 1; i >= 0; i--)
2052 int sys = fcd->coding_category_by_priority[i];
2053 if (decst.mask & (1 << sys))
2055 Lisp_Object codesys = fcd->coding_category_system[sys];
2056 if (!NILP (codesys))
2057 codesys = subsidiary_coding_system (codesys, decst.eol_type);
2058 val = Fcons (codesys, val);
2062 Lstream_close (istr);
2064 Lstream_delete (istr);
2065 Lstream_delete (lb_istr);
2070 /************************************************************************/
2071 /* Converting to internal Mule format ("decoding") */
2072 /************************************************************************/
2074 /* A decoding stream is a stream used for decoding text (i.e.
2075 converting from some external format to internal format).
2076 The decoding-stream object keeps track of the actual coding
2077 stream, the stream that is at the other end, and data that
2078 needs to be persistent across the lifetime of the stream. */
2080 /* Handle the EOL stuff related to just-read-in character C.
2081 EOL_TYPE is the EOL type of the coding stream.
2082 FLAGS is the current value of FLAGS in the coding stream, and may
2083 be modified by this macro. (The macro only looks at the
2084 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
2085 bytes are to be written. You need to also define a local goto
2086 label "label_continue_loop" that is at the end of the main
2087 character-reading loop.
2089 If C is a CR character, then this macro handles it entirely and
2090 jumps to label_continue_loop. Otherwise, this macro does not add
2091 anything to DST, and continues normally. You should continue
2092 processing C normally after this macro. */
2094 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
2098 if (eol_type == EOL_CR) \
2099 Dynarr_add (dst, '\n'); \
2100 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
2101 Dynarr_add (dst, c); \
2103 flags |= CODING_STATE_CR; \
2104 goto label_continue_loop; \
2106 else if (flags & CODING_STATE_CR) \
2107 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
2109 Dynarr_add (dst, '\r'); \
2110 flags &= ~CODING_STATE_CR; \
2114 /* C should be a binary character in the range 0 - 255; convert
2115 to internal format and add to Dynarr DST. */
2118 #define DECODE_ADD_BINARY_CHAR(c, dst) \
2120 if (BYTE_ASCII_P (c)) \
2121 Dynarr_add (dst, c); \
2124 Dynarr_add (dst, (c >> 6) | 0xc0); \
2125 Dynarr_add (dst, (c & 0x3f) | 0x80); \
2129 INLINE_HEADER void DECODE_ADD_UCS_CHAR(Emchar c, unsigned_char_dynarr* dst);
2131 DECODE_ADD_UCS_CHAR(Emchar c, unsigned_char_dynarr* dst)
2135 Dynarr_add (dst, c);
2137 else if ( c <= 0x7ff )
2139 Dynarr_add (dst, (c >> 6) | 0xc0);
2140 Dynarr_add (dst, (c & 0x3f) | 0x80);
2142 else if ( c <= 0xffff )
2144 Dynarr_add (dst, (c >> 12) | 0xe0);
2145 Dynarr_add (dst, ((c >> 6) & 0x3f) | 0x80);
2146 Dynarr_add (dst, (c & 0x3f) | 0x80);
2148 else if ( c <= 0x1fffff )
2150 Dynarr_add (dst, (c >> 18) | 0xf0);
2151 Dynarr_add (dst, ((c >> 12) & 0x3f) | 0x80);
2152 Dynarr_add (dst, ((c >> 6) & 0x3f) | 0x80);
2153 Dynarr_add (dst, (c & 0x3f) | 0x80);
2155 else if ( c <= 0x3ffffff )
2157 Dynarr_add (dst, (c >> 24) | 0xf8);
2158 Dynarr_add (dst, ((c >> 18) & 0x3f) | 0x80);
2159 Dynarr_add (dst, ((c >> 12) & 0x3f) | 0x80);
2160 Dynarr_add (dst, ((c >> 6) & 0x3f) | 0x80);
2161 Dynarr_add (dst, (c & 0x3f) | 0x80);
2165 Dynarr_add (dst, (c >> 30) | 0xfc);
2166 Dynarr_add (dst, ((c >> 24) & 0x3f) | 0x80);
2167 Dynarr_add (dst, ((c >> 18) & 0x3f) | 0x80);
2168 Dynarr_add (dst, ((c >> 12) & 0x3f) | 0x80);
2169 Dynarr_add (dst, ((c >> 6) & 0x3f) | 0x80);
2170 Dynarr_add (dst, (c & 0x3f) | 0x80);
2174 #define DECODE_ADD_BINARY_CHAR(c, dst) \
2176 if (BYTE_ASCII_P (c)) \
2177 Dynarr_add (dst, c); \
2178 else if (BYTE_C1_P (c)) \
2180 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
2181 Dynarr_add (dst, c + 0x20); \
2185 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
2186 Dynarr_add (dst, c); \
2191 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
2195 DECODE_ADD_BINARY_CHAR (ch, dst); \
2200 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
2202 if (flags & CODING_STATE_END) \
2204 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
2205 if (flags & CODING_STATE_CR) \
2206 Dynarr_add (dst, '\r'); \
2210 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
2212 struct decoding_stream
2214 /* Coding system that governs the conversion. */
2215 Lisp_Coding_System *codesys;
2217 /* Stream that we read the encoded data from or
2218 write the decoded data to. */
2221 /* If we are reading, then we can return only a fixed amount of
2222 data, so if the conversion resulted in too much data, we store it
2223 here for retrieval the next time around. */
2224 unsigned_char_dynarr *runoff;
2226 /* FLAGS holds flags indicating the current state of the decoding.
2227 Some of these flags are dependent on the coding system. */
2230 /* CPOS holds a partially built-up code-point of character. */
2233 /* EOL_TYPE specifies the type of end-of-line conversion that
2234 currently applies. We need to keep this separate from the
2235 EOL type stored in CODESYS because the latter might indicate
2236 automatic EOL-type detection while the former will always
2237 indicate a particular EOL type. */
2238 eol_type_t eol_type;
2240 /* Additional ISO2022 information. We define the structure above
2241 because it's also needed by the detection routines. */
2242 struct iso2022_decoder iso2022;
2244 /* Additional information (the state of the running CCL program)
2245 used by the CCL decoder. */
2246 struct ccl_program ccl;
2248 /* counter for UTF-8 or UCS-4 */
2249 unsigned char counter;
2252 unsigned char er_counter;
2253 unsigned char er_buf[16];
2255 unsigned combined_char_count;
2256 Emchar combined_chars[16];
2257 Lisp_Object combining_table;
2259 struct detection_state decst;
2263 extern Lisp_Object Vcharacter_composition_table;
2266 COMPOSE_FLUSH_CHARS (struct decoding_stream *str, unsigned_char_dynarr* dst);
2268 COMPOSE_FLUSH_CHARS (struct decoding_stream *str, unsigned_char_dynarr* dst)
2272 for (i = 0; i < str->combined_char_count; i++)
2273 DECODE_ADD_UCS_CHAR (str->combined_chars[i], dst);
2274 str->combined_char_count = 0;
2275 str->combining_table = Qnil;
2278 void COMPOSE_ADD_CHAR(struct decoding_stream *str, Emchar character,
2279 unsigned_char_dynarr* dst);
2281 COMPOSE_ADD_CHAR(struct decoding_stream *str,
2282 Emchar character, unsigned_char_dynarr* dst)
2284 if (CODING_SYSTEM_DISABLE_COMPOSITION (str->codesys))
2285 DECODE_ADD_UCS_CHAR (character, dst);
2286 else if (!CHAR_TABLEP (str->combining_table))
2289 = get_char_id_table (XCHAR_TABLE(Vcharacter_composition_table),
2293 DECODE_ADD_UCS_CHAR (character, dst);
2296 str->combined_chars[0] = character;
2297 str->combined_char_count = 1;
2298 str->combining_table = ret;
2304 = get_char_id_table (XCHAR_TABLE(str->combining_table),
2309 Emchar char2 = XCHARVAL (ret);
2311 get_char_id_table (XCHAR_TABLE(Vcharacter_composition_table),
2315 DECODE_ADD_UCS_CHAR (char2, dst);
2316 str->combined_char_count = 0;
2317 str->combining_table = Qnil;
2321 str->combined_chars[0] = char2;
2322 str->combined_char_count = 1;
2323 str->combining_table = ret;
2326 else if (CHAR_TABLEP (ret))
2328 str->combined_chars[str->combined_char_count++] = character;
2329 str->combining_table = ret;
2333 COMPOSE_FLUSH_CHARS (str, dst);
2334 DECODE_ADD_UCS_CHAR (character, dst);
2338 #else /* not UTF2000 */
2339 #define COMPOSE_FLUSH_CHARS(str, dst)
2340 #define COMPOSE_ADD_CHAR(str, ch, dst) DECODE_ADD_UCS_CHAR (ch, dst)
2341 #endif /* UTF2000 */
2343 static ssize_t decoding_reader (Lstream *stream,
2344 unsigned char *data, size_t size);
2345 static ssize_t decoding_writer (Lstream *stream,
2346 const unsigned char *data, size_t size);
2347 static int decoding_rewinder (Lstream *stream);
2348 static int decoding_seekable_p (Lstream *stream);
2349 static int decoding_flusher (Lstream *stream);
2350 static int decoding_closer (Lstream *stream);
2352 static Lisp_Object decoding_marker (Lisp_Object stream);
2354 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
2355 sizeof (struct decoding_stream));
2358 decoding_marker (Lisp_Object stream)
2360 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
2361 Lisp_Object str_obj;
2363 /* We do not need to mark the coding systems or charsets stored
2364 within the stream because they are stored in a global list
2365 and automatically marked. */
2367 XSETLSTREAM (str_obj, str);
2368 mark_object (str_obj);
2369 if (str->imp->marker)
2370 return (str->imp->marker) (str_obj);
2375 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
2376 so we read data from the other end, decode it, and store it into DATA. */
2379 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
2381 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2382 unsigned char *orig_data = data;
2384 int error_occurred = 0;
2386 /* We need to interface to mule_decode(), which expects to take some
2387 amount of data and store the result into a Dynarr. We have
2388 mule_decode() store into str->runoff, and take data from there
2391 /* We loop until we have enough data, reading chunks from the other
2392 end and decoding it. */
2395 /* Take data from the runoff if we can. Make sure to take at
2396 most SIZE bytes, and delete the data from the runoff. */
2397 if (Dynarr_length (str->runoff) > 0)
2399 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
2400 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
2401 Dynarr_delete_many (str->runoff, 0, chunk);
2407 break; /* No more room for data */
2409 if (str->flags & CODING_STATE_END)
2410 /* This means that on the previous iteration, we hit the EOF on
2411 the other end. We loop once more so that mule_decode() can
2412 output any final stuff it may be holding, or any "go back
2413 to a sane state" escape sequences. (This latter makes sense
2414 during encoding.) */
2417 /* Exhausted the runoff, so get some more. DATA has at least
2418 SIZE bytes left of storage in it, so it's OK to read directly
2419 into it. (We'll be overwriting above, after we've decoded it
2420 into the runoff.) */
2421 read_size = Lstream_read (str->other_end, data, size);
2428 /* There might be some more end data produced in the translation.
2429 See the comment above. */
2430 str->flags |= CODING_STATE_END;
2431 mule_decode (stream, (Extbyte *) data, str->runoff, read_size);
2434 if (data - orig_data == 0)
2435 return error_occurred ? -1 : 0;
2437 return data - orig_data;
2441 decoding_writer (Lstream *stream, const unsigned char *data, size_t size)
2443 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2446 /* Decode all our data into the runoff, and then attempt to write
2447 it all out to the other end. Remove whatever chunk we succeeded
2449 mule_decode (stream, (Extbyte *) data, str->runoff, size);
2450 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
2451 Dynarr_length (str->runoff));
2453 Dynarr_delete_many (str->runoff, 0, retval);
2454 /* Do NOT return retval. The return value indicates how much
2455 of the incoming data was written, not how many bytes were
2461 reset_decoding_stream (struct decoding_stream *str)
2464 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
2466 Lisp_Object coding_system;
2467 XSETCODING_SYSTEM (coding_system, str->codesys);
2468 reset_iso2022 (coding_system, &str->iso2022);
2470 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
2472 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
2477 str->er_counter = 0;
2478 str->combined_char_count = 0;
2479 str->combining_table = Qnil;
2481 str->flags = str->cpos = 0;
2485 decoding_rewinder (Lstream *stream)
2487 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2488 reset_decoding_stream (str);
2489 Dynarr_reset (str->runoff);
2490 return Lstream_rewind (str->other_end);
2494 decoding_seekable_p (Lstream *stream)
2496 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2497 return Lstream_seekable_p (str->other_end);
2501 decoding_flusher (Lstream *stream)
2503 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2504 return Lstream_flush (str->other_end);
2508 decoding_closer (Lstream *stream)
2510 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2511 if (stream->flags & LSTREAM_FL_WRITE)
2513 str->flags |= CODING_STATE_END;
2514 decoding_writer (stream, 0, 0);
2516 Dynarr_free (str->runoff);
2518 #ifdef ENABLE_COMPOSITE_CHARS
2519 if (str->iso2022.composite_chars)
2520 Dynarr_free (str->iso2022.composite_chars);
2523 return Lstream_close (str->other_end);
2527 decoding_stream_coding_system (Lstream *stream)
2529 Lisp_Object coding_system;
2530 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2532 XSETCODING_SYSTEM (coding_system, str->codesys);
2533 return subsidiary_coding_system (coding_system, str->eol_type);
2537 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
2539 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
2540 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
2542 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
2543 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
2544 reset_decoding_stream (str);
2547 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
2548 stream for writing, no automatic code detection will be performed.
2549 The reason for this is that automatic code detection requires a
2550 seekable input. Things will also fail if you open a decoding
2551 stream for reading using a non-fully-specified coding system and
2552 a non-seekable input stream. */
2555 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
2558 Lstream *lstr = Lstream_new (lstream_decoding, mode);
2559 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
2563 str->other_end = stream;
2564 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
2565 str->eol_type = EOL_AUTODETECT;
2566 if (!strcmp (mode, "r")
2567 && Lstream_seekable_p (stream))
2568 /* We can determine the coding system now. */
2569 determine_real_coding_system (stream, &codesys, &str->eol_type);
2570 set_decoding_stream_coding_system (lstr, codesys);
2571 str->decst.eol_type = str->eol_type;
2572 str->decst.mask = ~0;
2573 XSETLSTREAM (obj, lstr);
2578 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
2580 return make_decoding_stream_1 (stream, codesys, "r");
2584 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
2586 return make_decoding_stream_1 (stream, codesys, "w");
2589 /* Note: the decode_coding_* functions all take the same
2590 arguments as mule_decode(), which is to say some SRC data of
2591 size N, which is to be stored into dynamic array DST.
2592 DECODING is the stream within which the decoding is
2593 taking place, but no data is actually read from or
2594 written to that stream; that is handled in decoding_reader()
2595 or decoding_writer(). This allows the same functions to
2596 be used for both reading and writing. */
2599 mule_decode (Lstream *decoding, const Extbyte *src,
2600 unsigned_char_dynarr *dst, size_t n)
2602 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
2604 /* If necessary, do encoding-detection now. We do this when
2605 we're a writing stream or a non-seekable reading stream,
2606 meaning that we can't just process the whole input,
2607 rewind, and start over. */
2609 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
2610 str->eol_type == EOL_AUTODETECT)
2612 Lisp_Object codesys;
2614 XSETCODING_SYSTEM (codesys, str->codesys);
2615 detect_coding_type (&str->decst, src, n,
2616 CODING_SYSTEM_TYPE (str->codesys) !=
2617 CODESYS_AUTODETECT);
2618 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
2619 str->decst.mask != ~0)
2620 /* #### This is cheesy. What we really ought to do is
2621 buffer up a certain amount of data so as to get a
2622 less random result. */
2623 codesys = coding_system_from_mask (str->decst.mask);
2624 str->eol_type = str->decst.eol_type;
2625 if (XCODING_SYSTEM (codesys) != str->codesys)
2627 /* Preserve the CODING_STATE_END flag in case it was set.
2628 If we erase it, bad things might happen. */
2629 int was_end = str->flags & CODING_STATE_END;
2630 set_decoding_stream_coding_system (decoding, codesys);
2632 str->flags |= CODING_STATE_END;
2636 switch (CODING_SYSTEM_TYPE (str->codesys))
2639 case CODESYS_INTERNAL:
2640 Dynarr_add_many (dst, src, n);
2643 case CODESYS_AUTODETECT:
2644 /* If we got this far and still haven't decided on the coding
2645 system, then do no conversion. */
2646 case CODESYS_NO_CONVERSION:
2647 decode_coding_no_conversion (decoding, src, dst, n);
2650 case CODESYS_SHIFT_JIS:
2651 decode_coding_sjis (decoding, src, dst, n);
2654 decode_coding_big5 (decoding, src, dst, n);
2657 decode_coding_ucs4 (decoding, src, dst, n);
2660 decode_coding_utf8 (decoding, src, dst, n);
2663 str->ccl.last_block = str->flags & CODING_STATE_END;
2664 /* When applying ccl program to stream, MUST NOT set NULL
2666 ccl_driver (&str->ccl, (src ? (unsigned char *)src : (unsigned char*)""),
2667 dst, n, 0, CCL_MODE_DECODING);
2669 case CODESYS_ISO2022:
2670 decode_coding_iso2022 (decoding, src, dst, n);
2678 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
2679 Decode the text between START and END which is encoded in CODING-SYSTEM.
2680 This is useful if you've read in encoded text from a file without decoding
2681 it (e.g. you read in a JIS-formatted file but used the `binary' or
2682 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
2683 Return length of decoded text.
2684 BUFFER defaults to the current buffer if unspecified.
2686 (start, end, coding_system, buffer))
2689 struct buffer *buf = decode_buffer (buffer, 0);
2690 Lisp_Object instream, lb_outstream, de_outstream, outstream;
2691 Lstream *istr, *ostr;
2692 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
2694 get_buffer_range_char (buf, start, end, &b, &e, 0);
2696 barf_if_buffer_read_only (buf, b, e);
2698 coding_system = Fget_coding_system (coding_system);
2699 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
2700 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
2701 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
2703 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
2704 Fget_coding_system (Qbinary));
2705 istr = XLSTREAM (instream);
2706 ostr = XLSTREAM (outstream);
2707 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
2709 /* The chain of streams looks like this:
2711 [BUFFER] <----- send through
2712 ------> [ENCODE AS BINARY]
2713 ------> [DECODE AS SPECIFIED]
2719 char tempbuf[1024]; /* some random amount */
2720 Bufpos newpos, even_newer_pos;
2721 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
2722 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
2726 newpos = lisp_buffer_stream_startpos (istr);
2727 Lstream_write (ostr, tempbuf, size_in_bytes);
2728 even_newer_pos = lisp_buffer_stream_startpos (istr);
2729 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
2732 Lstream_close (istr);
2733 Lstream_close (ostr);
2735 Lstream_delete (istr);
2736 Lstream_delete (ostr);
2737 Lstream_delete (XLSTREAM (de_outstream));
2738 Lstream_delete (XLSTREAM (lb_outstream));
2743 /************************************************************************/
2744 /* Converting to an external encoding ("encoding") */
2745 /************************************************************************/
2747 /* An encoding stream is an output stream. When you create the
2748 stream, you specify the coding system that governs the encoding
2749 and another stream that the resulting encoded data is to be
2750 sent to, and then start sending data to it. */
2752 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
2754 struct encoding_stream
2756 /* Coding system that governs the conversion. */
2757 Lisp_Coding_System *codesys;
2759 /* Stream that we read the encoded data from or
2760 write the decoded data to. */
2763 /* If we are reading, then we can return only a fixed amount of
2764 data, so if the conversion resulted in too much data, we store it
2765 here for retrieval the next time around. */
2766 unsigned_char_dynarr *runoff;
2768 /* FLAGS holds flags indicating the current state of the encoding.
2769 Some of these flags are dependent on the coding system. */
2772 /* CH holds a partially built-up character. Since we only deal
2773 with one- and two-byte characters at the moment, we only use
2774 this to store the first byte of a two-byte character. */
2777 /* Additional information used by the ISO2022 encoder. */
2780 /* CHARSET holds the character sets currently assigned to the G0
2781 through G3 registers. It is initialized from the array
2782 INITIAL_CHARSET in CODESYS. */
2783 Lisp_Object charset[4];
2785 /* Which registers are currently invoked into the left (GL) and
2786 right (GR) halves of the 8-bit encoding space? */
2787 int register_left, register_right;
2789 /* Whether we need to explicitly designate the charset in the
2790 G? register before using it. It is initialized from the
2791 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
2792 unsigned char force_charset_on_output[4];
2794 /* Other state variables that need to be preserved across
2796 Lisp_Object current_charset;
2798 int current_char_boundary;
2801 void (*encode_char) (struct encoding_stream *str, Emchar c,
2802 unsigned_char_dynarr *dst, unsigned int *flags);
2803 void (*finish) (struct encoding_stream *str,
2804 unsigned_char_dynarr *dst, unsigned int *flags);
2806 /* Additional information (the state of the running CCL program)
2807 used by the CCL encoder. */
2808 struct ccl_program ccl;
2812 static ssize_t encoding_reader (Lstream *stream, unsigned char *data, size_t size);
2813 static ssize_t encoding_writer (Lstream *stream, const unsigned char *data,
2815 static int encoding_rewinder (Lstream *stream);
2816 static int encoding_seekable_p (Lstream *stream);
2817 static int encoding_flusher (Lstream *stream);
2818 static int encoding_closer (Lstream *stream);
2820 static Lisp_Object encoding_marker (Lisp_Object stream);
2822 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
2823 sizeof (struct encoding_stream));
2826 encoding_marker (Lisp_Object stream)
2828 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
2829 Lisp_Object str_obj;
2831 /* We do not need to mark the coding systems or charsets stored
2832 within the stream because they are stored in a global list
2833 and automatically marked. */
2835 XSETLSTREAM (str_obj, str);
2836 mark_object (str_obj);
2837 if (str->imp->marker)
2838 return (str->imp->marker) (str_obj);
2843 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
2844 so we read data from the other end, encode it, and store it into DATA. */
2847 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
2849 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2850 unsigned char *orig_data = data;
2852 int error_occurred = 0;
2854 /* We need to interface to mule_encode(), which expects to take some
2855 amount of data and store the result into a Dynarr. We have
2856 mule_encode() store into str->runoff, and take data from there
2859 /* We loop until we have enough data, reading chunks from the other
2860 end and encoding it. */
2863 /* Take data from the runoff if we can. Make sure to take at
2864 most SIZE bytes, and delete the data from the runoff. */
2865 if (Dynarr_length (str->runoff) > 0)
2867 int chunk = min ((int) size, Dynarr_length (str->runoff));
2868 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
2869 Dynarr_delete_many (str->runoff, 0, chunk);
2875 break; /* No more room for data */
2877 if (str->flags & CODING_STATE_END)
2878 /* This means that on the previous iteration, we hit the EOF on
2879 the other end. We loop once more so that mule_encode() can
2880 output any final stuff it may be holding, or any "go back
2881 to a sane state" escape sequences. (This latter makes sense
2882 during encoding.) */
2885 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
2886 left of storage in it, so it's OK to read directly into it.
2887 (We'll be overwriting above, after we've encoded it into the
2889 read_size = Lstream_read (str->other_end, data, size);
2896 /* There might be some more end data produced in the translation.
2897 See the comment above. */
2898 str->flags |= CODING_STATE_END;
2899 mule_encode (stream, data, str->runoff, read_size);
2902 if (data == orig_data)
2903 return error_occurred ? -1 : 0;
2905 return data - orig_data;
2909 encoding_writer (Lstream *stream, const unsigned char *data, size_t size)
2911 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2914 /* Encode all our data into the runoff, and then attempt to write
2915 it all out to the other end. Remove whatever chunk we succeeded
2917 mule_encode (stream, data, str->runoff, size);
2918 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
2919 Dynarr_length (str->runoff));
2921 Dynarr_delete_many (str->runoff, 0, retval);
2922 /* Do NOT return retval. The return value indicates how much
2923 of the incoming data was written, not how many bytes were
2929 reset_encoding_stream (struct encoding_stream *str)
2932 switch (CODING_SYSTEM_TYPE (str->codesys))
2934 case CODESYS_ISO2022:
2938 str->encode_char = &char_encode_iso2022;
2939 str->finish = &char_finish_iso2022;
2940 for (i = 0; i < 4; i++)
2942 str->iso2022.charset[i] =
2943 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
2944 str->iso2022.force_charset_on_output[i] =
2945 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
2947 str->iso2022.register_left = 0;
2948 str->iso2022.register_right = 1;
2949 str->iso2022.current_charset = Qnil;
2950 str->iso2022.current_half = 0;
2954 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
2957 str->encode_char = &char_encode_utf8;
2958 str->finish = &char_finish_utf8;
2961 str->encode_char = &char_encode_ucs4;
2962 str->finish = &char_finish_ucs4;
2964 case CODESYS_SHIFT_JIS:
2965 str->encode_char = &char_encode_shift_jis;
2966 str->finish = &char_finish_shift_jis;
2969 str->encode_char = &char_encode_big5;
2970 str->finish = &char_finish_big5;
2976 str->iso2022.current_char_boundary = 0;
2977 str->flags = str->ch = 0;
2981 encoding_rewinder (Lstream *stream)
2983 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2984 reset_encoding_stream (str);
2985 Dynarr_reset (str->runoff);
2986 return Lstream_rewind (str->other_end);
2990 encoding_seekable_p (Lstream *stream)
2992 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2993 return Lstream_seekable_p (str->other_end);
2997 encoding_flusher (Lstream *stream)
2999 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3000 return Lstream_flush (str->other_end);
3004 encoding_closer (Lstream *stream)
3006 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3007 if (stream->flags & LSTREAM_FL_WRITE)
3009 str->flags |= CODING_STATE_END;
3010 encoding_writer (stream, 0, 0);
3012 Dynarr_free (str->runoff);
3013 return Lstream_close (str->other_end);
3017 encoding_stream_coding_system (Lstream *stream)
3019 Lisp_Object coding_system;
3020 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3022 XSETCODING_SYSTEM (coding_system, str->codesys);
3023 return coding_system;
3027 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
3029 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
3030 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
3032 reset_encoding_stream (str);
3036 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
3039 Lstream *lstr = Lstream_new (lstream_encoding, mode);
3040 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
3044 str->runoff = Dynarr_new (unsigned_char);
3045 str->other_end = stream;
3046 set_encoding_stream_coding_system (lstr, codesys);
3047 XSETLSTREAM (obj, lstr);
3052 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
3054 return make_encoding_stream_1 (stream, codesys, "r");
3058 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
3060 return make_encoding_stream_1 (stream, codesys, "w");
3063 /* Convert N bytes of internally-formatted data stored in SRC to an
3064 external format, according to the encoding stream ENCODING.
3065 Store the encoded data into DST. */
3068 mule_encode (Lstream *encoding, const Bufbyte *src,
3069 unsigned_char_dynarr *dst, size_t n)
3071 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
3073 switch (CODING_SYSTEM_TYPE (str->codesys))
3076 case CODESYS_INTERNAL:
3077 Dynarr_add_many (dst, src, n);
3080 case CODESYS_AUTODETECT:
3081 /* If we got this far and still haven't decided on the coding
3082 system, then do no conversion. */
3083 case CODESYS_NO_CONVERSION:
3084 encode_coding_no_conversion (encoding, src, dst, n);
3088 str->ccl.last_block = str->flags & CODING_STATE_END;
3089 /* When applying ccl program to stream, MUST NOT set NULL
3091 ccl_driver (&str->ccl, ((src) ? src : (unsigned char*)""),
3092 dst, n, 0, CCL_MODE_ENCODING);
3096 text_encode_generic (encoding, src, dst, n);
3100 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
3101 Encode the text between START and END using CODING-SYSTEM.
3102 This will, for example, convert Japanese characters into stuff such as
3103 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
3104 text. BUFFER defaults to the current buffer if unspecified.
3106 (start, end, coding_system, buffer))
3109 struct buffer *buf = decode_buffer (buffer, 0);
3110 Lisp_Object instream, lb_outstream, de_outstream, outstream;
3111 Lstream *istr, *ostr;
3112 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
3114 get_buffer_range_char (buf, start, end, &b, &e, 0);
3116 barf_if_buffer_read_only (buf, b, e);
3118 coding_system = Fget_coding_system (coding_system);
3119 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
3120 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
3121 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
3122 Fget_coding_system (Qbinary));
3123 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
3125 istr = XLSTREAM (instream);
3126 ostr = XLSTREAM (outstream);
3127 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
3128 /* The chain of streams looks like this:
3130 [BUFFER] <----- send through
3131 ------> [ENCODE AS SPECIFIED]
3132 ------> [DECODE AS BINARY]
3137 char tempbuf[1024]; /* some random amount */
3138 Bufpos newpos, even_newer_pos;
3139 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
3140 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
3144 newpos = lisp_buffer_stream_startpos (istr);
3145 Lstream_write (ostr, tempbuf, size_in_bytes);
3146 even_newer_pos = lisp_buffer_stream_startpos (istr);
3147 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
3153 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
3154 Lstream_close (istr);
3155 Lstream_close (ostr);
3157 Lstream_delete (istr);
3158 Lstream_delete (ostr);
3159 Lstream_delete (XLSTREAM (de_outstream));
3160 Lstream_delete (XLSTREAM (lb_outstream));
3161 return make_int (retlen);
3168 text_encode_generic (Lstream *encoding, const Bufbyte *src,
3169 unsigned_char_dynarr *dst, size_t n)
3172 unsigned char char_boundary;
3173 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
3174 unsigned int flags = str->flags;
3175 Emchar ch = str->ch;
3177 char_boundary = str->iso2022.current_char_boundary;
3183 if (char_boundary == 0)
3211 (*str->encode_char) (str, c, dst, &flags);
3213 else if (char_boundary == 1)
3215 (*str->encode_char) (str, (ch << 6) | (c & 0x3f), dst, &flags);
3221 ch = (ch << 6) | (c & 0x3f);
3226 if ((char_boundary == 0) && (flags & CODING_STATE_END))
3228 (*str->finish) (str, dst, &flags);
3233 str->iso2022.current_char_boundary = char_boundary;
3237 /************************************************************************/
3238 /* Shift-JIS methods */
3239 /************************************************************************/
3241 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
3242 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
3243 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
3244 encoded by "position-code + 0x80". A character of JISX0208
3245 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
3246 position-codes are divided and shifted so that it fit in the range
3249 --- CODE RANGE of Shift-JIS ---
3250 (character set) (range)
3252 JISX0201-Kana 0xA0 .. 0xDF
3253 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
3254 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
3255 -------------------------------
3259 /* Is this the first byte of a Shift-JIS two-byte char? */
3261 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
3262 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
3264 /* Is this the second byte of a Shift-JIS two-byte char? */
3266 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
3267 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
3269 #define BYTE_SJIS_KATAKANA_P(c) \
3270 ((c) >= 0xA1 && (c) <= 0xDF)
3273 detect_coding_sjis (struct detection_state *st, const Extbyte *src, size_t n)
3277 unsigned char c = *(unsigned char *)src++;
3278 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
3280 if (st->shift_jis.in_second_byte)
3282 st->shift_jis.in_second_byte = 0;
3286 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
3287 st->shift_jis.in_second_byte = 1;
3289 return CODING_CATEGORY_SHIFT_JIS_MASK;
3292 /* Convert Shift-JIS data to internal format. */
3295 decode_coding_sjis (Lstream *decoding, const Extbyte *src,
3296 unsigned_char_dynarr *dst, size_t n)
3298 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3299 unsigned int flags = str->flags;
3300 unsigned int cpos = str->cpos;
3301 eol_type_t eol_type = str->eol_type;
3305 unsigned char c = *(unsigned char *)src++;
3309 /* Previous character was first byte of Shift-JIS Kanji char. */
3310 if (BYTE_SJIS_TWO_BYTE_2_P (c))
3312 unsigned char e1, e2;
3314 DECODE_SJIS (cpos, c, e1, e2);
3316 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_japanese_jisx0208,
3320 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
3321 Dynarr_add (dst, e1);
3322 Dynarr_add (dst, e2);
3327 DECODE_ADD_BINARY_CHAR (cpos, dst);
3328 DECODE_ADD_BINARY_CHAR (c, dst);
3334 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
3335 if (BYTE_SJIS_TWO_BYTE_1_P (c))
3337 else if (BYTE_SJIS_KATAKANA_P (c))
3340 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_katakana_jisx0201,
3343 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
3344 Dynarr_add (dst, c);
3349 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_latin_jisx0201,
3353 DECODE_ADD_BINARY_CHAR (c, dst);
3355 label_continue_loop:;
3358 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
3364 /* Convert internal character representation to Shift_JIS. */
3367 char_encode_shift_jis (struct encoding_stream *str, Emchar ch,
3368 unsigned_char_dynarr *dst, unsigned int *flags)
3370 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
3374 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
3375 Dynarr_add (dst, '\r');
3376 if (eol_type != EOL_CR)
3377 Dynarr_add (dst, ch);
3381 unsigned int s1, s2;
3383 int code_point = charset_code_point (Vcharset_latin_jisx0201, ch);
3385 if (code_point >= 0)
3386 Dynarr_add (dst, code_point);
3387 else if ((code_point
3388 = charset_code_point (Vcharset_japanese_jisx0208_1990, ch))
3391 ENCODE_SJIS ((code_point >> 8) | 0x80,
3392 (code_point & 0xFF) | 0x80, s1, s2);
3393 Dynarr_add (dst, s1);
3394 Dynarr_add (dst, s2);
3396 else if ((code_point
3397 = charset_code_point (Vcharset_katakana_jisx0201, ch))
3399 Dynarr_add (dst, code_point | 0x80);
3400 else if ((code_point
3401 = charset_code_point (Vcharset_japanese_jisx0208, ch))
3404 ENCODE_SJIS ((code_point >> 8) | 0x80,
3405 (code_point & 0xFF) | 0x80, s1, s2);
3406 Dynarr_add (dst, s1);
3407 Dynarr_add (dst, s2);
3409 else if ((code_point = charset_code_point (Vcharset_ascii, ch))
3411 Dynarr_add (dst, code_point);
3413 Dynarr_add (dst, '?');
3415 Lisp_Object charset;
3416 unsigned int c1, c2;
3418 BREAKUP_CHAR (ch, charset, c1, c2);
3420 if (EQ(charset, Vcharset_katakana_jisx0201))
3422 Dynarr_add (dst, c1 | 0x80);
3426 Dynarr_add (dst, c1);
3428 else if (EQ(charset, Vcharset_japanese_jisx0208))
3430 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
3431 Dynarr_add (dst, s1);
3432 Dynarr_add (dst, s2);
3435 Dynarr_add (dst, '?');
3441 char_finish_shift_jis (struct encoding_stream *str, unsigned_char_dynarr *dst,
3442 unsigned int *flags)
3446 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
3447 Decode a JISX0208 character of Shift-JIS coding-system.
3448 CODE is the character code in Shift-JIS as a cons of type bytes.
3449 Return the corresponding character.
3453 unsigned char c1, c2, s1, s2;
3456 CHECK_INT (XCAR (code));
3457 CHECK_INT (XCDR (code));
3458 s1 = XINT (XCAR (code));
3459 s2 = XINT (XCDR (code));
3460 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
3461 BYTE_SJIS_TWO_BYTE_2_P (s2))
3463 DECODE_SJIS (s1, s2, c1, c2);
3464 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
3465 c1 & 0x7F, c2 & 0x7F));
3471 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
3472 Encode a JISX0208 character CHARACTER to SHIFT-JIS coding-system.
3473 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
3477 Lisp_Object charset;
3480 CHECK_CHAR_COERCE_INT (character);
3481 BREAKUP_CHAR (XCHAR (character), charset, c1, c2);
3482 if (EQ (charset, Vcharset_japanese_jisx0208))
3484 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
3485 return Fcons (make_int (s1), make_int (s2));
3492 /************************************************************************/
3494 /************************************************************************/
3496 /* BIG5 is a coding system encoding two character sets: ASCII and
3497 Big5. An ASCII character is encoded as is. Big5 is a two-byte
3498 character set and is encoded in two-byte.
3500 --- CODE RANGE of BIG5 ---
3501 (character set) (range)
3503 Big5 (1st byte) 0xA1 .. 0xFE
3504 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
3505 --------------------------
3507 Since the number of characters in Big5 is larger than maximum
3508 characters in Emacs' charset (96x96), it can't be handled as one
3509 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
3510 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
3511 contains frequently used characters and the latter contains less
3512 frequently used characters. */
3515 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
3516 ((c) >= 0x81 && (c) <= 0xFE)
3518 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
3519 ((c) >= 0xA1 && (c) <= 0xFE)
3522 /* Is this the second byte of a Shift-JIS two-byte char? */
3524 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
3525 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
3527 /* Number of Big5 characters which have the same code in 1st byte. */
3529 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
3531 /* Code conversion macros. These are macros because they are used in
3532 inner loops during code conversion.
3534 Note that temporary variables in macros introduce the classic
3535 dynamic-scoping problems with variable names. We use capital-
3536 lettered variables in the assumption that XEmacs does not use
3537 capital letters in variables except in a very formalized way
3540 /* Convert Big5 code (b1, b2) into its internal string representation
3543 /* There is a much simpler way to split the Big5 charset into two.
3544 For the moment I'm going to leave the algorithm as-is because it
3545 claims to separate out the most-used characters into a single
3546 charset, which perhaps will lead to optimizations in various
3549 The way the algorithm works is something like this:
3551 Big5 can be viewed as a 94x157 charset, where the row is
3552 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
3553 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
3554 the split between low and high column numbers is apparently
3555 meaningless; ascending rows produce less and less frequent chars.
3556 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
3557 the first charset, and the upper half (0xC9 .. 0xFE) to the
3558 second. To do the conversion, we convert the character into
3559 a single number where 0 .. 156 is the first row, 157 .. 313
3560 is the second, etc. That way, the characters are ordered by
3561 decreasing frequency. Then we just chop the space in two
3562 and coerce the result into a 94x94 space.
3565 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
3567 int B1 = b1, B2 = b2; \
3569 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
3573 lb = LEADING_BYTE_CHINESE_BIG5_1; \
3577 lb = LEADING_BYTE_CHINESE_BIG5_2; \
3578 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
3580 c1 = I / (0xFF - 0xA1) + 0xA1; \
3581 c2 = I % (0xFF - 0xA1) + 0xA1; \
3584 /* Convert the internal string representation of a Big5 character
3585 (lb, c1, c2) into Big5 code (b1, b2). */
3587 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
3589 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
3591 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
3593 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
3595 b1 = I / BIG5_SAME_ROW + 0xA1; \
3596 b2 = I % BIG5_SAME_ROW; \
3597 b2 += b2 < 0x3F ? 0x40 : 0x62; \
3601 detect_coding_big5 (struct detection_state *st, const Extbyte *src, size_t n)
3605 unsigned char c = *(unsigned char *)src++;
3606 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO
3608 || (c >= 0x80 && c <= 0xA0)
3612 if (st->big5.in_second_byte)
3614 st->big5.in_second_byte = 0;
3615 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
3625 st->big5.in_second_byte = 1;
3627 return CODING_CATEGORY_BIG5_MASK;
3630 /* Convert Big5 data to internal format. */
3633 decode_coding_big5 (Lstream *decoding, const Extbyte *src,
3634 unsigned_char_dynarr *dst, size_t n)
3636 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3637 unsigned int flags = str->flags;
3638 unsigned int cpos = str->cpos;
3639 eol_type_t eol_type = str->eol_type;
3642 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (DECODING_STREAM_DATA
3643 (decoding)->codesys, 1);
3648 unsigned char c = *(unsigned char *)src++;
3651 /* Previous character was first byte of Big5 char. */
3652 if (BYTE_BIG5_TWO_BYTE_2_P (c))
3655 int code_point = (cpos << 8) | c;
3656 Emchar char_id = decode_defined_char (ccs, code_point);
3659 char_id = DECODE_CHAR (Vcharset_chinese_big5, code_point);
3660 DECODE_ADD_UCS_CHAR (char_id, dst);
3662 unsigned char b1, b2, b3;
3663 DECODE_BIG5 (cpos, c, b1, b2, b3);
3664 Dynarr_add (dst, b1);
3665 Dynarr_add (dst, b2);
3666 Dynarr_add (dst, b3);
3671 DECODE_ADD_BINARY_CHAR (cpos, dst);
3672 DECODE_ADD_BINARY_CHAR (c, dst);
3678 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
3679 if (BYTE_BIG5_TWO_BYTE_1_P (c))
3682 DECODE_ADD_BINARY_CHAR (c, dst);
3684 label_continue_loop:;
3687 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
3693 /* Convert internally-formatted data to Big5. */
3696 char_encode_big5 (struct encoding_stream *str, Emchar ch,
3697 unsigned_char_dynarr *dst, unsigned int *flags)
3699 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
3703 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
3704 Dynarr_add (dst, '\r');
3705 if (eol_type != EOL_CR)
3706 Dynarr_add (dst, ch);
3713 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, 1);
3715 if ((code_point = charset_code_point (Vcharset_ascii, ch)) >= 0)
3716 Dynarr_add (dst, code_point);
3717 else if ((code_point = charset_code_point (ccs, ch)) >= 0)
3719 Dynarr_add (dst, code_point >> 8);
3720 Dynarr_add (dst, code_point & 0xFF);
3722 else if ((code_point
3723 = charset_code_point (Vcharset_chinese_big5, ch)) >= 0)
3725 Dynarr_add (dst, code_point >> 8);
3726 Dynarr_add (dst, code_point & 0xFF);
3728 else if ((code_point
3729 = charset_code_point (Vcharset_chinese_big5_1, ch)) >= 0)
3732 = ((code_point >> 8) - 33) * (0xFF - 0xA1)
3733 + ((code_point & 0xFF) - 33);
3734 unsigned char b1 = I / BIG5_SAME_ROW + 0xA1;
3735 unsigned char b2 = I % BIG5_SAME_ROW;
3737 b2 += b2 < 0x3F ? 0x40 : 0x62;
3738 Dynarr_add (dst, b1);
3739 Dynarr_add (dst, b2);
3741 else if ((code_point
3742 = charset_code_point (Vcharset_chinese_big5_2, ch)) >= 0)
3745 = ((code_point >> 8) - 33) * (0xFF - 0xA1)
3746 + ((code_point & 0xFF) - 33);
3747 unsigned char b1, b2;
3749 I += BIG5_SAME_ROW * (0xC9 - 0xA1);
3750 b1 = I / BIG5_SAME_ROW + 0xA1;
3751 b2 = I % BIG5_SAME_ROW;
3752 b2 += b2 < 0x3F ? 0x40 : 0x62;
3753 Dynarr_add (dst, b1);
3754 Dynarr_add (dst, b2);
3757 Dynarr_add (dst, '?');
3764 char_finish_big5 (struct encoding_stream *str, unsigned_char_dynarr *dst,
3765 unsigned int *flags)
3770 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
3771 Decode a Big5 character CODE of BIG5 coding-system.
3772 CODE is the character code in BIG5, a cons of two integers.
3773 Return the corresponding character.
3777 unsigned char c1, c2, b1, b2;
3780 CHECK_INT (XCAR (code));
3781 CHECK_INT (XCDR (code));
3782 b1 = XINT (XCAR (code));
3783 b2 = XINT (XCDR (code));
3784 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
3785 BYTE_BIG5_TWO_BYTE_2_P (b2))
3787 Charset_ID leading_byte;
3788 Lisp_Object charset;
3789 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
3790 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
3791 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
3797 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
3798 Encode the Big5 character CHARACTER in the BIG5 coding-system.
3799 Return the corresponding character code in Big5.
3803 Lisp_Object charset;
3806 CHECK_CHAR_COERCE_INT (character);
3807 BREAKUP_CHAR (XCHAR (character), charset, c1, c2);
3808 if (EQ (charset, Vcharset_chinese_big5_1) ||
3809 EQ (charset, Vcharset_chinese_big5_2))
3811 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
3813 return Fcons (make_int (b1), make_int (b2));
3820 /************************************************************************/
3822 /************************************************************************/
3825 detect_coding_ucs4 (struct detection_state *st, const Extbyte *src, size_t n)
3829 unsigned char c = *(unsigned char *)src++;
3830 switch (st->ucs4.in_byte)
3839 st->ucs4.in_byte = 0;
3845 return CODING_CATEGORY_UCS4_MASK;
3849 decode_coding_ucs4 (Lstream *decoding, const Extbyte *src,
3850 unsigned_char_dynarr *dst, size_t n)
3852 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3853 unsigned int flags = str->flags;
3854 unsigned int cpos = str->cpos;
3855 unsigned char counter = str->counter;
3859 unsigned char c = *(unsigned char *)src++;
3867 DECODE_ADD_UCS_CHAR ((cpos << 8) | c, dst);
3872 cpos = ( cpos << 8 ) | c;
3876 if (counter & CODING_STATE_END)
3877 DECODE_OUTPUT_PARTIAL_CHAR (cpos);
3881 str->counter = counter;
3885 char_encode_ucs4 (struct encoding_stream *str, Emchar ch,
3886 unsigned_char_dynarr *dst, unsigned int *flags)
3888 Dynarr_add (dst, ch >> 24);
3889 Dynarr_add (dst, ch >> 16);
3890 Dynarr_add (dst, ch >> 8);
3891 Dynarr_add (dst, ch );
3895 char_finish_ucs4 (struct encoding_stream *str, unsigned_char_dynarr *dst,
3896 unsigned int *flags)
3901 /************************************************************************/
3903 /************************************************************************/
3906 detect_coding_utf8 (struct detection_state *st, const Extbyte *src, size_t n)
3910 unsigned char c = *(unsigned char *)src++;
3911 switch (st->utf8.in_byte)
3914 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
3917 st->utf8.in_byte = 5;
3919 st->utf8.in_byte = 4;
3921 st->utf8.in_byte = 3;
3923 st->utf8.in_byte = 2;
3925 st->utf8.in_byte = 1;
3930 if ((c & 0xc0) != 0x80)
3936 return CODING_CATEGORY_UTF8_MASK;
3940 decode_output_utf8_partial_char (unsigned char counter,
3942 unsigned_char_dynarr *dst)
3945 DECODE_ADD_BINARY_CHAR ( (cpos|0xFC), dst);
3946 else if (counter == 4)
3948 if (cpos < (1 << 6))
3949 DECODE_ADD_BINARY_CHAR ( (cpos|0xF8), dst);
3952 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xFC), dst);
3953 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3956 else if (counter == 3)
3958 if (cpos < (1 << 6))
3959 DECODE_ADD_BINARY_CHAR ( (cpos|0xF0), dst);
3960 else if (cpos < (1 << 12))
3962 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xF8), dst);
3963 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3967 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xFC), dst);
3968 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
3969 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
3972 else if (counter == 2)
3974 if (cpos < (1 << 6))
3975 DECODE_ADD_BINARY_CHAR ( (cpos|0xE0), dst);
3976 else if (cpos < (1 << 12))
3978 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xF0), dst);
3979 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3981 else if (cpos < (1 << 18))
3983 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xF8), dst);
3984 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
3985 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
3989 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 18)|0xFC), dst);
3990 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
3991 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
3992 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
3997 if (cpos < (1 << 6))
3998 DECODE_ADD_BINARY_CHAR ( (cpos|0xC0), dst);
3999 else if (cpos < (1 << 12))
4001 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xE0), dst);
4002 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
4004 else if (cpos < (1 << 18))
4006 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xF0), dst);
4007 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4008 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4010 else if (cpos < (1 << 24))
4012 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 18)|0xF8), dst);
4013 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
4014 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4015 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4019 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 24)|0xFC), dst);
4020 DECODE_ADD_BINARY_CHAR ( (((cpos >> 18)&0x3F)|0x80), dst);
4021 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
4022 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4023 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4029 decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
4030 unsigned_char_dynarr *dst, size_t n)
4032 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
4033 unsigned int flags = str->flags;
4034 unsigned int cpos = str->cpos;
4035 eol_type_t eol_type = str->eol_type;
4036 unsigned char counter = str->counter;
4037 unsigned char er_counter = str->er_counter;
4041 unsigned char c = *(unsigned char *)src++;
4046 if ( er_counter > 0)
4048 Dynarr_add_many (dst, str->er_buf, er_counter);
4051 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
4052 DECODE_ADD_UCS_CHAR (c, dst);
4054 else if ( c < 0xC0 )
4056 if (er_counter == 0)
4058 if (CODING_SYSTEM_USE_ENTITY_REFERENCE (str->codesys)
4061 str->er_buf[0] = '&';
4065 DECODE_ADD_UCS_CHAR (c, dst);
4069 Lisp_Object string = make_string (str->er_buf, er_counter);
4070 Lisp_Object rest = Vcoded_charset_entity_reference_alist;
4077 while (!NILP (rest))
4081 if (NILP (ccs = Ffind_charset (ccs)))
4096 pat = concat3 (build_string ("^&"),
4097 pat, build_string ("\\([0-9]+\\)$"));
4100 else if (EQ (ret, Qx))
4102 pat = concat3 (build_string ("^&"),
4104 build_string ("\\([0-9a-f]+\\)$"));
4107 else if (EQ (ret, QX))
4109 pat = concat3 (build_string ("^&"),
4111 build_string ("\\([0-9A-F]+\\)$"));
4117 if (!NILP (Fstring_match (pat, string, Qnil, Qnil)))
4120 = XINT (Fstring_to_number
4121 (Fsubstring (string,
4124 Fmatch_end (make_int (1))),
4127 DECODE_ADD_UCS_CHAR (DECODE_CHAR (ccs, code), dst);
4132 if (!NILP (Fstring_match
4133 (build_string ("^&MCS-\\([0-9A-F]+\\)$"),
4134 string, Qnil, Qnil)))
4137 = XINT (Fstring_to_number
4138 (Fsubstring (string,
4141 Fmatch_end (make_int (1))),
4144 DECODE_ADD_UCS_CHAR (code, dst);
4148 Dynarr_add_many (dst, str->er_buf, er_counter);
4149 Dynarr_add (dst, ';');
4154 else if ( (er_counter >= 16) || (c >= 0x7F) )
4156 Dynarr_add_many (dst, str->er_buf, er_counter);
4158 DECODE_ADD_UCS_CHAR (c, dst);
4161 str->er_buf[er_counter++] = c;
4165 Dynarr_add_many (dst, str->er_buf, er_counter);
4172 else if ( c < 0xF0 )
4177 else if ( c < 0xF8 )
4182 else if ( c < 0xFC )
4194 else if ( (c & 0xC0) == 0x80 )
4196 cpos = ( cpos << 6 ) | ( c & 0x3f );
4199 DECODE_ADD_UCS_CHAR (cpos, dst);
4208 decode_output_utf8_partial_char (counter, cpos, dst);
4209 DECODE_ADD_BINARY_CHAR (c, dst);
4213 label_continue_loop:;
4216 if (flags & CODING_STATE_END)
4218 if ( er_counter > 0)
4220 Dynarr_add_many (dst, str->er_buf, er_counter);
4225 decode_output_utf8_partial_char (counter, cpos, dst);
4232 str->counter = counter;
4233 str->er_counter = er_counter;
4237 char_encode_utf8 (struct encoding_stream *str, Emchar ch,
4238 unsigned_char_dynarr *dst, unsigned int *flags)
4240 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
4244 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
4245 Dynarr_add (dst, '\r');
4246 if (eol_type != EOL_CR)
4247 Dynarr_add (dst, ch);
4249 else if (ch <= 0x7f)
4251 Dynarr_add (dst, ch);
4255 int code_point = charset_code_point (Vcharset_ucs, ch);
4257 if ( (code_point < 0) || (code_point > 0x10FFFF) )
4259 if (CODING_SYSTEM_USE_ENTITY_REFERENCE (str->codesys))
4261 Lisp_Object rest = Vcoded_charset_entity_reference_alist;
4265 int format_columns, idx;
4266 char buf[16], format[16];
4268 while (!NILP (rest))
4272 if (!NILP (ccs = Ffind_charset (ccs)))
4275 = charset_code_point (ccs, ch)) >= 0 )
4280 && ((idx =XSTRING_LENGTH (ret)) <= 6))
4282 strncpy (format, XSTRING_DATA (ret), idx);
4291 format [idx++] = '%';
4292 format_columns = XINT (ret);
4293 if ( (2 <= format_columns)
4294 && (format_columns <= 8) )
4296 format [idx++] = '0';
4297 format [idx++] = '0' + format_columns;
4304 format [idx++] = 'd';
4305 else if (EQ (ret, Qx))
4306 format [idx++] = 'x';
4307 else if (EQ (ret, QX))
4308 format [idx++] = 'X';
4313 sprintf (buf, format, code_point);
4314 Dynarr_add (dst, '&');
4315 Dynarr_add_many (dst, buf, strlen (buf));
4316 Dynarr_add (dst, ';');
4322 sprintf (buf, "&MCS-%08X;", ch);
4323 Dynarr_add_many (dst, buf, strlen (buf));
4329 if (code_point <= 0x7ff)
4331 Dynarr_add (dst, (code_point >> 6) | 0xc0);
4332 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4334 else if (code_point <= 0xffff)
4336 Dynarr_add (dst, (code_point >> 12) | 0xe0);
4337 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4338 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4340 else if (code_point <= 0x1fffff)
4342 Dynarr_add (dst, (code_point >> 18) | 0xf0);
4343 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4344 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4345 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4347 else if (code_point <= 0x3ffffff)
4349 Dynarr_add (dst, (code_point >> 24) | 0xf8);
4350 Dynarr_add (dst, ((code_point >> 18) & 0x3f) | 0x80);
4351 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4352 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4353 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4357 Dynarr_add (dst, (code_point >> 30) | 0xfc);
4358 Dynarr_add (dst, ((code_point >> 24) & 0x3f) | 0x80);
4359 Dynarr_add (dst, ((code_point >> 18) & 0x3f) | 0x80);
4360 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4361 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4362 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4368 char_finish_utf8 (struct encoding_stream *str, unsigned_char_dynarr *dst,
4369 unsigned int *flags)
4374 /************************************************************************/
4375 /* ISO2022 methods */
4376 /************************************************************************/
4378 /* The following note describes the coding system ISO2022 briefly.
4379 Since the intention of this note is to help understand the
4380 functions in this file, some parts are NOT ACCURATE or OVERLY
4381 SIMPLIFIED. For thorough understanding, please refer to the
4382 original document of ISO2022.
4384 ISO2022 provides many mechanisms to encode several character sets
4385 in 7-bit and 8-bit environments. For 7-bit environments, all text
4386 is encoded using bytes less than 128. This may make the encoded
4387 text a little bit longer, but the text passes more easily through
4388 several gateways, some of which strip off MSB (Most Signigant Bit).
4390 There are two kinds of character sets: control character set and
4391 graphic character set. The former contains control characters such
4392 as `newline' and `escape' to provide control functions (control
4393 functions are also provided by escape sequences). The latter
4394 contains graphic characters such as 'A' and '-'. Emacs recognizes
4395 two control character sets and many graphic character sets.
4397 Graphic character sets are classified into one of the following
4398 four classes, according to the number of bytes (DIMENSION) and
4399 number of characters in one dimension (CHARS) of the set:
4400 - DIMENSION1_CHARS94
4401 - DIMENSION1_CHARS96
4402 - DIMENSION2_CHARS94
4403 - DIMENSION2_CHARS96
4405 In addition, each character set is assigned an identification tag,
4406 unique for each set, called "final character" (denoted as <F>
4407 hereafter). The <F> of each character set is decided by ECMA(*)
4408 when it is registered in ISO. The code range of <F> is 0x30..0x7F
4409 (0x30..0x3F are for private use only).
4411 Note (*): ECMA = European Computer Manufacturers Association
4413 Here are examples of graphic character set [NAME(<F>)]:
4414 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
4415 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
4416 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
4417 o DIMENSION2_CHARS96 -- none for the moment
4419 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
4420 C0 [0x00..0x1F] -- control character plane 0
4421 GL [0x20..0x7F] -- graphic character plane 0
4422 C1 [0x80..0x9F] -- control character plane 1
4423 GR [0xA0..0xFF] -- graphic character plane 1
4425 A control character set is directly designated and invoked to C0 or
4426 C1 by an escape sequence. The most common case is that:
4427 - ISO646's control character set is designated/invoked to C0, and
4428 - ISO6429's control character set is designated/invoked to C1,
4429 and usually these designations/invocations are omitted in encoded
4430 text. In a 7-bit environment, only C0 can be used, and a control
4431 character for C1 is encoded by an appropriate escape sequence to
4432 fit into the environment. All control characters for C1 are
4433 defined to have corresponding escape sequences.
4435 A graphic character set is at first designated to one of four
4436 graphic registers (G0 through G3), then these graphic registers are
4437 invoked to GL or GR. These designations and invocations can be
4438 done independently. The most common case is that G0 is invoked to
4439 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
4440 these invocations and designations are omitted in encoded text.
4441 In a 7-bit environment, only GL can be used.
4443 When a graphic character set of CHARS94 is invoked to GL, codes
4444 0x20 and 0x7F of the GL area work as control characters SPACE and
4445 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
4448 There are two ways of invocation: locking-shift and single-shift.
4449 With locking-shift, the invocation lasts until the next different
4450 invocation, whereas with single-shift, the invocation affects the
4451 following character only and doesn't affect the locking-shift
4452 state. Invocations are done by the following control characters or
4455 ----------------------------------------------------------------------
4456 abbrev function cntrl escape seq description
4457 ----------------------------------------------------------------------
4458 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
4459 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
4460 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
4461 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
4462 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
4463 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
4464 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
4465 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
4466 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
4467 ----------------------------------------------------------------------
4468 (*) These are not used by any known coding system.
4470 Control characters for these functions are defined by macros
4471 ISO_CODE_XXX in `coding.h'.
4473 Designations are done by the following escape sequences:
4474 ----------------------------------------------------------------------
4475 escape sequence description
4476 ----------------------------------------------------------------------
4477 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
4478 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
4479 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
4480 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
4481 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
4482 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
4483 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
4484 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
4485 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
4486 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
4487 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
4488 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
4489 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
4490 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
4491 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
4492 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
4493 ----------------------------------------------------------------------
4495 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
4496 of dimension 1, chars 94, and final character <F>, etc...
4498 Note (*): Although these designations are not allowed in ISO2022,
4499 Emacs accepts them on decoding, and produces them on encoding
4500 CHARS96 character sets in a coding system which is characterized as
4501 7-bit environment, non-locking-shift, and non-single-shift.
4503 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
4504 '(' can be omitted. We refer to this as "short-form" hereafter.
4506 Now you may notice that there are a lot of ways for encoding the
4507 same multilingual text in ISO2022. Actually, there exist many
4508 coding systems such as Compound Text (used in X11's inter client
4509 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
4510 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
4511 localized platforms), and all of these are variants of ISO2022.
4513 In addition to the above, Emacs handles two more kinds of escape
4514 sequences: ISO6429's direction specification and Emacs' private
4515 sequence for specifying character composition.
4517 ISO6429's direction specification takes the following form:
4518 o CSI ']' -- end of the current direction
4519 o CSI '0' ']' -- end of the current direction
4520 o CSI '1' ']' -- start of left-to-right text
4521 o CSI '2' ']' -- start of right-to-left text
4522 The control character CSI (0x9B: control sequence introducer) is
4523 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
4525 Character composition specification takes the following form:
4526 o ESC '0' -- start character composition
4527 o ESC '1' -- end character composition
4528 Since these are not standard escape sequences of any ISO standard,
4529 their use with these meanings is restricted to Emacs only. */
4532 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
4536 for (i = 0; i < 4; i++)
4538 if (!NILP (coding_system))
4540 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
4542 iso->charset[i] = Qt;
4543 iso->invalid_designated[i] = 0;
4545 iso->esc = ISO_ESC_NOTHING;
4546 iso->esc_bytes_index = 0;
4547 iso->register_left = 0;
4548 iso->register_right = 1;
4549 iso->switched_dir_and_no_valid_charset_yet = 0;
4550 iso->invalid_switch_dir = 0;
4551 iso->output_direction_sequence = 0;
4552 iso->output_literally = 0;
4553 #ifdef ENABLE_COMPOSITE_CHARS
4554 if (iso->composite_chars)
4555 Dynarr_reset (iso->composite_chars);
4560 fit_to_be_escape_quoted (unsigned char c)
4577 /* Parse one byte of an ISO2022 escape sequence.
4578 If the result is an invalid escape sequence, return 0 and
4579 do not change anything in STR. Otherwise, if the result is
4580 an incomplete escape sequence, update ISO2022.ESC and
4581 ISO2022.ESC_BYTES and return -1. Otherwise, update
4582 all the state variables (but not ISO2022.ESC_BYTES) and
4585 If CHECK_INVALID_CHARSETS is non-zero, check for designation
4586 or invocation of an invalid character set and treat that as
4587 an unrecognized escape sequence. */
4590 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
4591 unsigned char c, unsigned int *flags,
4592 int check_invalid_charsets)
4594 /* (1) If we're at the end of a designation sequence, CS is the
4595 charset being designated and REG is the register to designate
4598 (2) If we're at the end of a locking-shift sequence, REG is
4599 the register to invoke and HALF (0 == left, 1 == right) is
4600 the half to invoke it into.
4602 (3) If we're at the end of a single-shift sequence, REG is
4603 the register to invoke. */
4604 Lisp_Object cs = Qnil;
4607 /* NOTE: This code does goto's all over the fucking place.
4608 The reason for this is that we're basically implementing
4609 a state machine here, and hierarchical languages like C
4610 don't really provide a clean way of doing this. */
4612 if (! (*flags & CODING_STATE_ESCAPE))
4613 /* At beginning of escape sequence; we need to reset our
4614 escape-state variables. */
4615 iso->esc = ISO_ESC_NOTHING;
4617 iso->output_literally = 0;
4618 iso->output_direction_sequence = 0;
4622 case ISO_ESC_NOTHING:
4623 iso->esc_bytes_index = 0;
4626 case ISO_CODE_ESC: /* Start escape sequence */
4627 *flags |= CODING_STATE_ESCAPE;
4631 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
4632 *flags |= CODING_STATE_ESCAPE;
4633 iso->esc = ISO_ESC_5_11;
4636 case ISO_CODE_SO: /* locking shift 1 */
4639 case ISO_CODE_SI: /* locking shift 0 */
4643 case ISO_CODE_SS2: /* single shift */
4646 case ISO_CODE_SS3: /* single shift */
4650 default: /* Other control characters */
4657 /**** single shift ****/
4659 case 'N': /* single shift 2 */
4662 case 'O': /* single shift 3 */
4666 /**** locking shift ****/
4668 case '~': /* locking shift 1 right */
4671 case 'n': /* locking shift 2 */
4674 case '}': /* locking shift 2 right */
4677 case 'o': /* locking shift 3 */
4680 case '|': /* locking shift 3 right */
4684 #ifdef ENABLE_COMPOSITE_CHARS
4685 /**** composite ****/
4688 iso->esc = ISO_ESC_START_COMPOSITE;
4689 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
4690 CODING_STATE_COMPOSITE;
4694 iso->esc = ISO_ESC_END_COMPOSITE;
4695 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
4696 ~CODING_STATE_COMPOSITE;
4698 #endif /* ENABLE_COMPOSITE_CHARS */
4700 /**** directionality ****/
4703 iso->esc = ISO_ESC_5_11;
4706 /**** designation ****/
4708 case '$': /* multibyte charset prefix */
4709 iso->esc = ISO_ESC_2_4;
4713 if (0x28 <= c && c <= 0x2F)
4715 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
4719 /* This function is called with CODESYS equal to nil when
4720 doing coding-system detection. */
4722 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
4723 && fit_to_be_escape_quoted (c))
4725 iso->esc = ISO_ESC_LITERAL;
4726 *flags &= CODING_STATE_ISO2022_LOCK;
4736 /**** directionality ****/
4738 case ISO_ESC_5_11: /* ISO6429 direction control */
4741 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4742 goto directionality;
4744 if (c == '0') iso->esc = ISO_ESC_5_11_0;
4745 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
4746 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
4750 case ISO_ESC_5_11_0:
4753 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4754 goto directionality;
4758 case ISO_ESC_5_11_1:
4761 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4762 goto directionality;
4766 case ISO_ESC_5_11_2:
4769 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
4770 goto directionality;
4775 iso->esc = ISO_ESC_DIRECTIONALITY;
4776 /* Various junk here to attempt to preserve the direction sequences
4777 literally in the text if they would otherwise be swallowed due
4778 to invalid designations that don't show up as actual charset
4779 changes in the text. */
4780 if (iso->invalid_switch_dir)
4782 /* We already inserted a direction switch literally into the
4783 text. We assume (#### this may not be right) that the
4784 next direction switch is the one going the other way,
4785 and we need to output that literally as well. */
4786 iso->output_literally = 1;
4787 iso->invalid_switch_dir = 0;
4793 /* If we are in the thrall of an invalid designation,
4794 then stick the directionality sequence literally into the
4795 output stream so it ends up in the original text again. */
4796 for (jj = 0; jj < 4; jj++)
4797 if (iso->invalid_designated[jj])
4801 iso->output_literally = 1;
4802 iso->invalid_switch_dir = 1;
4805 /* Indicate that we haven't yet seen a valid designation,
4806 so that if a switch-dir is directly followed by an
4807 invalid designation, both get inserted literally. */
4808 iso->switched_dir_and_no_valid_charset_yet = 1;
4813 /**** designation ****/
4816 if (0x28 <= c && c <= 0x2F)
4818 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
4821 if (0x40 <= c && c <= 0x42)
4824 cs = CHARSET_BY_ATTRIBUTES (94, -1, c,
4825 *flags & CODING_STATE_R2L ?
4826 CHARSET_RIGHT_TO_LEFT :
4827 CHARSET_LEFT_TO_RIGHT);
4838 if (c < '0' || c > '~')
4839 return 0; /* bad final byte */
4841 if (iso->esc >= ISO_ESC_2_8 &&
4842 iso->esc <= ISO_ESC_2_15)
4844 chars = (iso->esc >= ISO_ESC_2_12) ? 96 : 94;
4845 single = 1; /* single-byte */
4846 reg = (iso->esc - ISO_ESC_2_8) & 3;
4848 else if (iso->esc >= ISO_ESC_2_4_8 &&
4849 iso->esc <= ISO_ESC_2_4_15)
4851 chars = (iso->esc >= ISO_ESC_2_4_12) ? 96 : 94;
4852 single = -1; /* multi-byte */
4853 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
4857 /* Can this ever be reached? -slb */
4861 cs = CHARSET_BY_ATTRIBUTES (chars, single, c,
4862 *flags & CODING_STATE_R2L ?
4863 CHARSET_RIGHT_TO_LEFT :
4864 CHARSET_LEFT_TO_RIGHT);
4870 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
4874 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
4875 /* can't invoke something that ain't there. */
4877 iso->esc = ISO_ESC_SINGLE_SHIFT;
4878 *flags &= CODING_STATE_ISO2022_LOCK;
4880 *flags |= CODING_STATE_SS2;
4882 *flags |= CODING_STATE_SS3;
4886 if (check_invalid_charsets &&
4887 !CHARSETP (iso->charset[reg]))
4888 /* can't invoke something that ain't there. */
4891 iso->register_right = reg;
4893 iso->register_left = reg;
4894 *flags &= CODING_STATE_ISO2022_LOCK;
4895 iso->esc = ISO_ESC_LOCKING_SHIFT;
4899 if (NILP (cs) && check_invalid_charsets)
4901 iso->invalid_designated[reg] = 1;
4902 iso->charset[reg] = Vcharset_ascii;
4903 iso->esc = ISO_ESC_DESIGNATE;
4904 *flags &= CODING_STATE_ISO2022_LOCK;
4905 iso->output_literally = 1;
4906 if (iso->switched_dir_and_no_valid_charset_yet)
4908 /* We encountered a switch-direction followed by an
4909 invalid designation. Ensure that the switch-direction
4910 gets outputted; otherwise it will probably get eaten
4911 when the text is written out again. */
4912 iso->switched_dir_and_no_valid_charset_yet = 0;
4913 iso->output_direction_sequence = 1;
4914 /* And make sure that the switch-dir going the other
4915 way gets outputted, as well. */
4916 iso->invalid_switch_dir = 1;
4920 /* This function is called with CODESYS equal to nil when
4921 doing coding-system detection. */
4922 if (!NILP (codesys))
4924 charset_conversion_spec_dynarr *dyn =
4925 XCODING_SYSTEM (codesys)->iso2022.input_conv;
4931 for (i = 0; i < Dynarr_length (dyn); i++)
4933 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
4934 if (EQ (cs, spec->from_charset))
4935 cs = spec->to_charset;
4940 iso->charset[reg] = cs;
4941 iso->esc = ISO_ESC_DESIGNATE;
4942 *flags &= CODING_STATE_ISO2022_LOCK;
4943 if (iso->invalid_designated[reg])
4945 iso->invalid_designated[reg] = 0;
4946 iso->output_literally = 1;
4948 if (iso->switched_dir_and_no_valid_charset_yet)
4949 iso->switched_dir_and_no_valid_charset_yet = 0;
4954 detect_coding_iso2022 (struct detection_state *st, const Extbyte *src, size_t n)
4958 /* #### There are serious deficiencies in the recognition mechanism
4959 here. This needs to be much smarter if it's going to cut it.
4960 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
4961 it should be detected as Latin-1.
4962 All the ISO2022 stuff in this file should be synced up with the
4963 code from FSF Emacs-20.4, in which Mule should be more or less stable.
4964 Perhaps we should wait till R2L works in FSF Emacs? */
4966 if (!st->iso2022.initted)
4968 reset_iso2022 (Qnil, &st->iso2022.iso);
4969 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
4970 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
4971 CODING_CATEGORY_ISO_8_1_MASK |
4972 CODING_CATEGORY_ISO_8_2_MASK |
4973 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
4974 st->iso2022.flags = 0;
4975 st->iso2022.high_byte_count = 0;
4976 st->iso2022.saw_single_shift = 0;
4977 st->iso2022.initted = 1;
4980 mask = st->iso2022.mask;
4984 unsigned char c = *(unsigned char *)src++;
4987 mask &= ~CODING_CATEGORY_ISO_7_MASK;
4988 st->iso2022.high_byte_count++;
4992 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
4994 if (st->iso2022.high_byte_count & 1)
4995 /* odd number of high bytes; assume not iso-8-2 */
4996 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
4998 st->iso2022.high_byte_count = 0;
4999 st->iso2022.saw_single_shift = 0;
5001 mask &= ~CODING_CATEGORY_ISO_7_MASK;
5003 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
5004 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
5005 { /* control chars */
5008 /* Allow and ignore control characters that you might
5009 reasonably see in a text file */
5014 case 8: /* backspace */
5015 case 11: /* vertical tab */
5016 case 12: /* form feed */
5017 case 26: /* MS-DOS C-z junk */
5018 case 31: /* '^_' -- for info */
5019 goto label_continue_loop;
5026 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
5029 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
5030 &st->iso2022.flags, 0))
5032 switch (st->iso2022.iso.esc)
5034 case ISO_ESC_DESIGNATE:
5035 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
5036 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
5038 case ISO_ESC_LOCKING_SHIFT:
5039 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
5040 goto ran_out_of_chars;
5041 case ISO_ESC_SINGLE_SHIFT:
5042 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
5043 st->iso2022.saw_single_shift = 1;
5052 goto ran_out_of_chars;
5055 label_continue_loop:;
5064 postprocess_iso2022_mask (int mask)
5066 /* #### kind of cheesy */
5067 /* If seven-bit ISO is allowed, then assume that the encoding is
5068 entirely seven-bit and turn off the eight-bit ones. */
5069 if (mask & CODING_CATEGORY_ISO_7_MASK)
5070 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
5071 CODING_CATEGORY_ISO_8_1_MASK |
5072 CODING_CATEGORY_ISO_8_2_MASK);
5076 /* If FLAGS is a null pointer or specifies right-to-left motion,
5077 output a switch-dir-to-left-to-right sequence to DST.
5078 Also update FLAGS if it is not a null pointer.
5079 If INTERNAL_P is set, we are outputting in internal format and
5080 need to handle the CSI differently. */
5083 restore_left_to_right_direction (Lisp_Coding_System *codesys,
5084 unsigned_char_dynarr *dst,
5085 unsigned int *flags,
5088 if (!flags || (*flags & CODING_STATE_R2L))
5090 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5092 Dynarr_add (dst, ISO_CODE_ESC);
5093 Dynarr_add (dst, '[');
5095 else if (internal_p)
5096 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
5098 Dynarr_add (dst, ISO_CODE_CSI);
5099 Dynarr_add (dst, '0');
5100 Dynarr_add (dst, ']');
5102 *flags &= ~CODING_STATE_R2L;
5106 /* If FLAGS is a null pointer or specifies a direction different from
5107 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
5108 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
5109 sequence to DST. Also update FLAGS if it is not a null pointer.
5110 If INTERNAL_P is set, we are outputting in internal format and
5111 need to handle the CSI differently. */
5114 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
5115 unsigned_char_dynarr *dst, unsigned int *flags,
5118 if ((!flags || (*flags & CODING_STATE_R2L)) &&
5119 direction == CHARSET_LEFT_TO_RIGHT)
5120 restore_left_to_right_direction (codesys, dst, flags, internal_p);
5121 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
5122 && (!flags || !(*flags & CODING_STATE_R2L)) &&
5123 direction == CHARSET_RIGHT_TO_LEFT)
5125 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5127 Dynarr_add (dst, ISO_CODE_ESC);
5128 Dynarr_add (dst, '[');
5130 else if (internal_p)
5131 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
5133 Dynarr_add (dst, ISO_CODE_CSI);
5134 Dynarr_add (dst, '2');
5135 Dynarr_add (dst, ']');
5137 *flags |= CODING_STATE_R2L;
5141 /* Convert ISO2022-format data to internal format. */
5144 decode_coding_iso2022 (Lstream *decoding, const Extbyte *src,
5145 unsigned_char_dynarr *dst, size_t n)
5147 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
5148 unsigned int flags = str->flags;
5149 unsigned int cpos = str->cpos;
5150 unsigned char counter = str->counter;
5151 eol_type_t eol_type = str->eol_type;
5152 #ifdef ENABLE_COMPOSITE_CHARS
5153 unsigned_char_dynarr *real_dst = dst;
5155 Lisp_Object coding_system;
5157 XSETCODING_SYSTEM (coding_system, str->codesys);
5159 #ifdef ENABLE_COMPOSITE_CHARS
5160 if (flags & CODING_STATE_COMPOSITE)
5161 dst = str->iso2022.composite_chars;
5162 #endif /* ENABLE_COMPOSITE_CHARS */
5166 unsigned char c = *(unsigned char *)src++;
5167 if (flags & CODING_STATE_ESCAPE)
5168 { /* Within ESC sequence */
5169 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
5174 switch (str->iso2022.esc)
5176 #ifdef ENABLE_COMPOSITE_CHARS
5177 case ISO_ESC_START_COMPOSITE:
5178 if (str->iso2022.composite_chars)
5179 Dynarr_reset (str->iso2022.composite_chars);
5181 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
5182 dst = str->iso2022.composite_chars;
5184 case ISO_ESC_END_COMPOSITE:
5186 Bufbyte comstr[MAX_EMCHAR_LEN];
5188 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
5189 Dynarr_length (dst));
5191 len = set_charptr_emchar (comstr, emch);
5192 Dynarr_add_many (dst, comstr, len);
5195 #endif /* ENABLE_COMPOSITE_CHARS */
5197 case ISO_ESC_LITERAL:
5198 COMPOSE_FLUSH_CHARS (str, dst);
5199 DECODE_ADD_BINARY_CHAR (c, dst);
5203 /* Everything else handled already */
5208 /* Attempted error recovery. */
5209 if (str->iso2022.output_direction_sequence)
5210 ensure_correct_direction (flags & CODING_STATE_R2L ?
5211 CHARSET_RIGHT_TO_LEFT :
5212 CHARSET_LEFT_TO_RIGHT,
5213 str->codesys, dst, 0, 1);
5214 /* More error recovery. */
5215 if (!retval || str->iso2022.output_literally)
5217 /* Output the (possibly invalid) sequence */
5219 COMPOSE_FLUSH_CHARS (str, dst);
5220 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
5221 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
5222 flags &= CODING_STATE_ISO2022_LOCK;
5224 n++, src--;/* Repeat the loop with the same character. */
5227 /* No sense in reprocessing the final byte of the
5228 escape sequence; it could mess things up anyway.
5230 COMPOSE_FLUSH_CHARS (str, dst);
5231 DECODE_ADD_BINARY_CHAR (c, dst);
5237 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
5238 { /* Control characters */
5240 /***** Error-handling *****/
5242 /* If we were in the middle of a character, dump out the
5243 partial character. */
5246 COMPOSE_FLUSH_CHARS (str, dst);
5250 DECODE_ADD_BINARY_CHAR
5251 ((unsigned char)(cpos >> (counter * 8)), dst);
5256 /* If we just saw a single-shift character, dump it out.
5257 This may dump out the wrong sort of single-shift character,
5258 but least it will give an indication that something went
5260 if (flags & CODING_STATE_SS2)
5262 COMPOSE_FLUSH_CHARS (str, dst);
5263 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
5264 flags &= ~CODING_STATE_SS2;
5266 if (flags & CODING_STATE_SS3)
5268 COMPOSE_FLUSH_CHARS (str, dst);
5269 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
5270 flags &= ~CODING_STATE_SS3;
5273 /***** Now handle the control characters. *****/
5279 COMPOSE_FLUSH_CHARS (str, dst);
5280 if (eol_type == EOL_CR)
5281 Dynarr_add (dst, '\n');
5282 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR)
5283 Dynarr_add (dst, c);
5285 flags |= CODING_STATE_CR;
5286 goto label_continue_loop;
5288 else if (flags & CODING_STATE_CR)
5289 { /* eol_type == CODING_SYSTEM_EOL_CRLF */
5291 Dynarr_add (dst, '\r');
5292 flags &= ~CODING_STATE_CR;
5295 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5298 flags &= CODING_STATE_ISO2022_LOCK;
5300 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
5302 COMPOSE_FLUSH_CHARS (str, dst);
5303 DECODE_ADD_BINARY_CHAR (c, dst);
5307 { /* Graphic characters */
5308 Lisp_Object charset;
5317 COMPOSE_FLUSH_CHARS (str, dst);
5318 if (eol_type == EOL_CR)
5319 Dynarr_add (dst, '\n');
5320 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR)
5321 Dynarr_add (dst, c);
5323 flags |= CODING_STATE_CR;
5324 goto label_continue_loop;
5326 else if (flags & CODING_STATE_CR)
5327 { /* eol_type == CODING_SYSTEM_EOL_CRLF */
5329 Dynarr_add (dst, '\r');
5330 flags &= ~CODING_STATE_CR;
5333 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5336 /* Now determine the charset. */
5337 reg = ((flags & CODING_STATE_SS2) ? 2
5338 : (flags & CODING_STATE_SS3) ? 3
5339 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
5340 : str->iso2022.register_left);
5341 charset = str->iso2022.charset[reg];
5343 /* Error checking: */
5344 if (! CHARSETP (charset)
5345 || str->iso2022.invalid_designated[reg]
5346 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
5347 && XCHARSET_CHARS (charset) == 94))
5348 /* Mrmph. We are trying to invoke a register that has no
5349 or an invalid charset in it, or trying to add a character
5350 outside the range of the charset. Insert that char literally
5351 to preserve it for the output. */
5353 COMPOSE_FLUSH_CHARS (str, dst);
5357 DECODE_ADD_BINARY_CHAR
5358 ((unsigned char)(cpos >> (counter * 8)), dst);
5361 DECODE_ADD_BINARY_CHAR (c, dst);
5366 /* Things are probably hunky-dorey. */
5368 /* Fetch reverse charset, maybe. */
5369 if (((flags & CODING_STATE_R2L) &&
5370 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
5372 (!(flags & CODING_STATE_R2L) &&
5373 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
5375 Lisp_Object new_charset =
5376 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
5377 if (!NILP (new_charset))
5378 charset = new_charset;
5383 if (XCHARSET_DIMENSION (charset) == counter)
5385 COMPOSE_ADD_CHAR (str,
5386 DECODE_CHAR (charset,
5387 ((cpos & 0x7F7F7F) << 8)
5394 cpos = (cpos << 8) | c;
5396 lb = XCHARSET_LEADING_BYTE (charset);
5397 switch (XCHARSET_REP_BYTES (charset))
5400 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5401 Dynarr_add (dst, c & 0x7F);
5404 case 2: /* one-byte official */
5405 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5406 Dynarr_add (dst, lb);
5407 Dynarr_add (dst, c | 0x80);
5410 case 3: /* one-byte private or two-byte official */
5411 if (XCHARSET_PRIVATE_P (charset))
5413 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5414 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
5415 Dynarr_add (dst, lb);
5416 Dynarr_add (dst, c | 0x80);
5422 Dynarr_add (dst, lb);
5423 Dynarr_add (dst, ch | 0x80);
5424 Dynarr_add (dst, c | 0x80);
5432 default: /* two-byte private */
5435 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
5436 Dynarr_add (dst, lb);
5437 Dynarr_add (dst, ch | 0x80);
5438 Dynarr_add (dst, c | 0x80);
5448 flags &= CODING_STATE_ISO2022_LOCK;
5451 label_continue_loop:;
5454 if (flags & CODING_STATE_END)
5456 COMPOSE_FLUSH_CHARS (str, dst);
5457 DECODE_OUTPUT_PARTIAL_CHAR (cpos);
5461 str->counter = counter;
5465 /***** ISO2022 encoder *****/
5467 /* Designate CHARSET into register REG. */
5470 iso2022_designate (Lisp_Object charset, unsigned char reg,
5471 struct encoding_stream *str, unsigned_char_dynarr *dst)
5473 static const char inter94[] = "()*+";
5474 static const char inter96[] = ",-./";
5475 unsigned short chars;
5476 unsigned char dimension;
5477 unsigned char final;
5478 Lisp_Object old_charset = str->iso2022.charset[reg];
5480 str->iso2022.charset[reg] = charset;
5481 if (!CHARSETP (charset))
5482 /* charset might be an initial nil or t. */
5484 chars = XCHARSET_CHARS (charset);
5485 dimension = XCHARSET_DIMENSION (charset);
5486 final = XCHARSET_FINAL (charset);
5487 if (!str->iso2022.force_charset_on_output[reg] &&
5488 CHARSETP (old_charset) &&
5489 XCHARSET_CHARS (old_charset) == chars &&
5490 XCHARSET_DIMENSION (old_charset) == dimension &&
5491 XCHARSET_FINAL (old_charset) == final)
5494 str->iso2022.force_charset_on_output[reg] = 0;
5497 charset_conversion_spec_dynarr *dyn =
5498 str->codesys->iso2022.output_conv;
5504 for (i = 0; i < Dynarr_length (dyn); i++)
5506 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
5507 if (EQ (charset, spec->from_charset))
5508 charset = spec->to_charset;
5513 Dynarr_add (dst, ISO_CODE_ESC);
5518 Dynarr_add (dst, inter94[reg]);
5521 Dynarr_add (dst, '$');
5523 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
5526 Dynarr_add (dst, inter94[reg]);
5531 Dynarr_add (dst, inter96[reg]);
5534 Dynarr_add (dst, '$');
5535 Dynarr_add (dst, inter96[reg]);
5539 Dynarr_add (dst, final);
5543 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
5545 if (str->iso2022.register_left != 0)
5547 Dynarr_add (dst, ISO_CODE_SI);
5548 str->iso2022.register_left = 0;
5553 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
5555 if (str->iso2022.register_left != 1)
5557 Dynarr_add (dst, ISO_CODE_SO);
5558 str->iso2022.register_left = 1;
5563 char_encode_iso2022 (struct encoding_stream *str, Emchar ch,
5564 unsigned_char_dynarr *dst, unsigned int *flags)
5566 unsigned char charmask;
5567 Lisp_Coding_System* codesys = str->codesys;
5568 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
5570 Lisp_Object charset = str->iso2022.current_charset;
5571 int half = str->iso2022.current_half;
5572 int code_point = -1;
5576 restore_left_to_right_direction (codesys, dst, flags, 0);
5578 /* Make sure G0 contains ASCII */
5579 if ((ch > ' ' && ch < ISO_CODE_DEL)
5580 || !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
5582 ensure_normal_shift (str, dst);
5583 iso2022_designate (Vcharset_ascii, 0, str, dst);
5586 /* If necessary, restore everything to the default state
5588 if (ch == '\n' && !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
5590 restore_left_to_right_direction (codesys, dst, flags, 0);
5592 ensure_normal_shift (str, dst);
5594 for (i = 0; i < 4; i++)
5596 Lisp_Object initial_charset =
5597 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
5598 iso2022_designate (initial_charset, i, str, dst);
5603 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5604 Dynarr_add (dst, '\r');
5605 if (eol_type != EOL_CR)
5606 Dynarr_add (dst, ch);
5610 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
5611 && fit_to_be_escape_quoted (ch))
5612 Dynarr_add (dst, ISO_CODE_ESC);
5613 Dynarr_add (dst, ch);
5616 else if ( (0x80 <= ch) && (ch <= 0x9f) )
5618 charmask = (half == 0 ? 0x00 : 0x80);
5620 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
5621 && fit_to_be_escape_quoted (ch))
5622 Dynarr_add (dst, ISO_CODE_ESC);
5623 /* you asked for it ... */
5624 Dynarr_add (dst, ch);
5630 /* Now determine which register to use. */
5632 for (i = 0; i < 4; i++)
5634 if ((CHARSETP (charset = str->iso2022.charset[i])
5635 && ((code_point = charset_code_point (charset, ch)) >= 0))
5639 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i))
5640 && ((code_point = charset_code_point (charset, ch)) >= 0)))
5648 Lisp_Object original_default_coded_charset_priority_list
5649 = Vdefault_coded_charset_priority_list;
5651 while (!EQ (Vdefault_coded_charset_priority_list, Qnil))
5653 code_point = ENCODE_CHAR (ch, charset);
5654 if (XCHARSET_FINAL (charset))
5656 Vdefault_coded_charset_priority_list
5657 = Fcdr (Fmemq (XCHARSET_NAME (charset),
5658 Vdefault_coded_charset_priority_list));
5660 code_point = ENCODE_CHAR (ch, charset);
5661 if (!XCHARSET_FINAL (charset))
5663 charset = Vcharset_ascii;
5667 Vdefault_coded_charset_priority_list
5668 = original_default_coded_charset_priority_list;
5670 ensure_correct_direction (XCHARSET_DIRECTION (charset),
5671 codesys, dst, flags, 0);
5675 if (XCHARSET_GRAPHIC (charset) != 0)
5677 if (!NILP (str->iso2022.charset[1]) &&
5678 (!CODING_SYSTEM_ISO2022_SEVEN (codesys)
5679 || CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
5681 else if (!NILP (str->iso2022.charset[2]))
5683 else if (!NILP (str->iso2022.charset[3]))
5692 iso2022_designate (charset, reg, str, dst);
5694 /* Now invoke that register. */
5698 ensure_normal_shift (str, dst);
5702 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5704 ensure_shift_out (str, dst);
5711 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
5713 Dynarr_add (dst, ISO_CODE_ESC);
5714 Dynarr_add (dst, 'N');
5719 Dynarr_add (dst, ISO_CODE_SS2);
5724 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
5726 Dynarr_add (dst, ISO_CODE_ESC);
5727 Dynarr_add (dst, 'O');
5732 Dynarr_add (dst, ISO_CODE_SS3);
5740 charmask = (half == 0 ? 0x00 : 0x80);
5742 switch (XCHARSET_DIMENSION (charset))
5745 Dynarr_add (dst, (code_point & 0xFF) | charmask);
5748 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5749 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5752 Dynarr_add (dst, ((code_point >> 16) & 0xFF) | charmask);
5753 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5754 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5757 Dynarr_add (dst, ((code_point >> 24) & 0xFF) | charmask);
5758 Dynarr_add (dst, ((code_point >> 16) & 0xFF) | charmask);
5759 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5760 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5766 str->iso2022.current_charset = charset;
5767 str->iso2022.current_half = half;
5771 char_finish_iso2022 (struct encoding_stream *str, unsigned_char_dynarr *dst,
5772 unsigned int *flags)
5774 Lisp_Coding_System* codesys = str->codesys;
5777 restore_left_to_right_direction (codesys, dst, flags, 0);
5778 ensure_normal_shift (str, dst);
5779 for (i = 0; i < 4; i++)
5781 Lisp_Object initial_charset
5782 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
5783 iso2022_designate (initial_charset, i, str, dst);
5788 /************************************************************************/
5789 /* No-conversion methods */
5790 /************************************************************************/
5792 /* This is used when reading in "binary" files -- i.e. files that may
5793 contain all 256 possible byte values and that are not to be
5794 interpreted as being in any particular decoding. */
5796 decode_coding_no_conversion (Lstream *decoding, const Extbyte *src,
5797 unsigned_char_dynarr *dst, size_t n)
5799 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
5800 unsigned int flags = str->flags;
5801 unsigned int cpos = str->cpos;
5802 eol_type_t eol_type = str->eol_type;
5806 unsigned char c = *(unsigned char *)src++;
5808 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5809 DECODE_ADD_BINARY_CHAR (c, dst);
5810 label_continue_loop:;
5813 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
5820 encode_coding_no_conversion (Lstream *encoding, const Bufbyte *src,
5821 unsigned_char_dynarr *dst, size_t n)
5824 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
5825 unsigned int flags = str->flags;
5826 unsigned int ch = str->ch;
5827 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
5829 unsigned char char_boundary = str->iso2022.current_char_boundary;
5836 if (char_boundary == 0)
5842 else if ( c >= 0xf8 )
5847 else if ( c >= 0xf0 )
5852 else if ( c >= 0xe0 )
5857 else if ( c >= 0xc0 )
5867 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5868 Dynarr_add (dst, '\r');
5869 if (eol_type != EOL_CR)
5870 Dynarr_add (dst, c);
5873 Dynarr_add (dst, c);
5876 else if (char_boundary == 1)
5878 ch = ( ch << 6 ) | ( c & 0x3f );
5879 Dynarr_add (dst, ch & 0xff);
5884 ch = ( ch << 6 ) | ( c & 0x3f );
5887 #else /* not UTF2000 */
5890 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5891 Dynarr_add (dst, '\r');
5892 if (eol_type != EOL_CR)
5893 Dynarr_add (dst, '\n');
5896 else if (BYTE_ASCII_P (c))
5899 Dynarr_add (dst, c);
5901 else if (BUFBYTE_LEADING_BYTE_P (c))
5904 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
5905 c == LEADING_BYTE_CONTROL_1)
5908 Dynarr_add (dst, '~'); /* untranslatable character */
5912 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
5913 Dynarr_add (dst, c);
5914 else if (ch == LEADING_BYTE_CONTROL_1)
5917 Dynarr_add (dst, c - 0x20);
5919 /* else it should be the second or third byte of an
5920 untranslatable character, so ignore it */
5923 #endif /* not UTF2000 */
5929 str->iso2022.current_char_boundary = char_boundary;
5935 /************************************************************************/
5936 /* Initialization */
5937 /************************************************************************/
5940 syms_of_file_coding (void)
5942 INIT_LRECORD_IMPLEMENTATION (coding_system);
5944 deferror (&Qcoding_system_error, "coding-system-error",
5945 "Coding-system error", Qio_error);
5947 DEFSUBR (Fcoding_system_p);
5948 DEFSUBR (Ffind_coding_system);
5949 DEFSUBR (Fget_coding_system);
5950 DEFSUBR (Fcoding_system_list);
5951 DEFSUBR (Fcoding_system_name);
5952 DEFSUBR (Fmake_coding_system);
5953 DEFSUBR (Fcopy_coding_system);
5954 DEFSUBR (Fcoding_system_canonical_name_p);
5955 DEFSUBR (Fcoding_system_alias_p);
5956 DEFSUBR (Fcoding_system_aliasee);
5957 DEFSUBR (Fdefine_coding_system_alias);
5958 DEFSUBR (Fsubsidiary_coding_system);
5960 DEFSUBR (Fcoding_system_type);
5961 DEFSUBR (Fcoding_system_doc_string);
5963 DEFSUBR (Fcoding_system_charset);
5965 DEFSUBR (Fcoding_system_property);
5967 DEFSUBR (Fcoding_category_list);
5968 DEFSUBR (Fset_coding_priority_list);
5969 DEFSUBR (Fcoding_priority_list);
5970 DEFSUBR (Fset_coding_category_system);
5971 DEFSUBR (Fcoding_category_system);
5973 DEFSUBR (Fdetect_coding_region);
5974 DEFSUBR (Fdecode_coding_region);
5975 DEFSUBR (Fencode_coding_region);
5977 DEFSUBR (Fdecode_shift_jis_char);
5978 DEFSUBR (Fencode_shift_jis_char);
5979 DEFSUBR (Fdecode_big5_char);
5980 DEFSUBR (Fencode_big5_char);
5982 defsymbol (&Qcoding_systemp, "coding-system-p");
5983 defsymbol (&Qno_conversion, "no-conversion");
5984 defsymbol (&Qraw_text, "raw-text");
5986 defsymbol (&Qbig5, "big5");
5987 defsymbol (&Qshift_jis, "shift-jis");
5988 defsymbol (&Qucs4, "ucs-4");
5989 defsymbol (&Qutf8, "utf-8");
5990 defsymbol (&Qccl, "ccl");
5991 defsymbol (&Qiso2022, "iso2022");
5993 defsymbol (&Qmnemonic, "mnemonic");
5994 defsymbol (&Qeol_type, "eol-type");
5995 defsymbol (&Qpost_read_conversion, "post-read-conversion");
5996 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
5998 defsymbol (&Qcr, "cr");
5999 defsymbol (&Qlf, "lf");
6000 defsymbol (&Qcrlf, "crlf");
6001 defsymbol (&Qeol_cr, "eol-cr");
6002 defsymbol (&Qeol_lf, "eol-lf");
6003 defsymbol (&Qeol_crlf, "eol-crlf");
6005 defsymbol (&Qcharset_g0, "charset-g0");
6006 defsymbol (&Qcharset_g1, "charset-g1");
6007 defsymbol (&Qcharset_g2, "charset-g2");
6008 defsymbol (&Qcharset_g3, "charset-g3");
6009 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
6010 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
6011 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
6012 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
6013 defsymbol (&Qno_iso6429, "no-iso6429");
6014 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
6015 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
6017 defsymbol (&Qshort, "short");
6018 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
6019 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
6020 defsymbol (&Qseven, "seven");
6021 defsymbol (&Qlock_shift, "lock-shift");
6022 defsymbol (&Qescape_quoted, "escape-quoted");
6025 defsymbol (&Qdisable_composition, "disable-composition");
6026 defsymbol (&Quse_entity_reference, "use-entity-reference");
6027 defsymbol (&Qd, "d");
6028 defsymbol (&Qx, "x");
6029 defsymbol (&QX, "X");
6031 defsymbol (&Qencode, "encode");
6032 defsymbol (&Qdecode, "decode");
6035 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
6037 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
6039 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
6041 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
6043 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
6045 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
6047 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
6049 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
6051 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
6054 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
6059 lstream_type_create_file_coding (void)
6061 LSTREAM_HAS_METHOD (decoding, reader);
6062 LSTREAM_HAS_METHOD (decoding, writer);
6063 LSTREAM_HAS_METHOD (decoding, rewinder);
6064 LSTREAM_HAS_METHOD (decoding, seekable_p);
6065 LSTREAM_HAS_METHOD (decoding, flusher);
6066 LSTREAM_HAS_METHOD (decoding, closer);
6067 LSTREAM_HAS_METHOD (decoding, marker);
6069 LSTREAM_HAS_METHOD (encoding, reader);
6070 LSTREAM_HAS_METHOD (encoding, writer);
6071 LSTREAM_HAS_METHOD (encoding, rewinder);
6072 LSTREAM_HAS_METHOD (encoding, seekable_p);
6073 LSTREAM_HAS_METHOD (encoding, flusher);
6074 LSTREAM_HAS_METHOD (encoding, closer);
6075 LSTREAM_HAS_METHOD (encoding, marker);
6079 vars_of_file_coding (void)
6083 fcd = xnew (struct file_coding_dump);
6084 dump_add_root_struct_ptr (&fcd, &fcd_description);
6086 /* Initialize to something reasonable ... */
6087 for (i = 0; i < CODING_CATEGORY_LAST; i++)
6089 fcd->coding_category_system[i] = Qnil;
6090 fcd->coding_category_by_priority[i] = i;
6093 Fprovide (intern ("file-coding"));
6095 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
6096 Coding system used for TTY keyboard input.
6097 Not used under a windowing system.
6099 Vkeyboard_coding_system = Qnil;
6101 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
6102 Coding system used for TTY display output.
6103 Not used under a windowing system.
6105 Vterminal_coding_system = Qnil;
6107 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
6108 Overriding coding system used when reading from a file or process.
6109 You should bind this variable with `let', but do not set it globally.
6110 If this is non-nil, it specifies the coding system that will be used
6111 to decode input on read operations, such as from a file or process.
6112 It overrides `buffer-file-coding-system-for-read',
6113 `insert-file-contents-pre-hook', etc. Use those variables instead of
6114 this one for permanent changes to the environment. */ );
6115 Vcoding_system_for_read = Qnil;
6117 DEFVAR_LISP ("coding-system-for-write",
6118 &Vcoding_system_for_write /*
6119 Overriding coding system used when writing to a file or process.
6120 You should bind this variable with `let', but do not set it globally.
6121 If this is non-nil, it specifies the coding system that will be used
6122 to encode output for write operations, such as to a file or process.
6123 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
6124 Use those variables instead of this one for permanent changes to the
6126 Vcoding_system_for_write = Qnil;
6128 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
6129 Coding system used to convert pathnames when accessing files.
6131 Vfile_name_coding_system = Qnil;
6133 DEFVAR_LISP ("coded-charset-entity-reference-alist",
6134 &Vcoded_charset_entity_reference_alist /*
6135 Alist of coded-charset vs corresponding entity-reference.
6136 Each element looks like (CCS PREFIX CODE-COLUMNS CODE-TYPE).
6137 CCS is coded-charset.
6138 CODE-COLUMNS is columns of code-point of entity-reference.
6139 CODE-TYPE is format type of code-point of entity-reference.
6140 `d' means decimal value and `x' means hexadecimal value.
6142 Vcoded_charset_entity_reference_alist = Qnil;
6144 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
6145 Non-nil means the buffer contents are regarded as multi-byte form
6146 of characters, not a binary code. This affects the display, file I/O,
6147 and behaviors of various editing commands.
6149 Setting this to nil does not do anything.
6151 enable_multibyte_characters = 1;
6155 complex_vars_of_file_coding (void)
6157 staticpro (&Vcoding_system_hash_table);
6158 Vcoding_system_hash_table =
6159 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
6161 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
6162 dump_add_root_struct_ptr (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
6164 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
6166 struct codesys_prop csp; \
6168 csp.prop_type = (Prop_Type); \
6169 Dynarr_add (the_codesys_prop_dynarr, csp); \
6172 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
6173 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
6174 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
6175 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
6176 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
6177 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
6178 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
6180 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
6181 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
6182 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
6183 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
6184 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
6185 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
6186 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
6187 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
6188 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
6189 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
6190 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
6191 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
6192 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
6193 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
6194 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
6195 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
6196 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
6198 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
6199 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
6201 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qdisable_composition);
6202 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Quse_entity_reference);
6205 /* Need to create this here or we're really screwed. */
6207 (Qraw_text, Qno_conversion,
6208 build_string ("Raw text, which means it converts only line-break-codes."),
6209 list2 (Qmnemonic, build_string ("Raw")));
6212 (Qbinary, Qno_conversion,
6213 build_string ("Binary, which means it does not convert anything."),
6214 list4 (Qeol_type, Qlf,
6215 Qmnemonic, build_string ("Binary")));
6220 build_string ("Coding-system of ISO/IEC 10646 UTF-8."),
6221 list2 (Qmnemonic, build_string ("UTF8")));
6224 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
6226 Fdefine_coding_system_alias (Qfile_name, Qbinary);
6228 Fdefine_coding_system_alias (Qterminal, Qbinary);
6229 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
6231 /* Need this for bootstrapping */
6232 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
6233 Fget_coding_system (Qraw_text);
6236 fcd->coding_category_system[CODING_CATEGORY_UTF8]
6237 = Fget_coding_system (Qutf8);
6240 #if defined(MULE) && !defined(UTF2000)
6244 for (i = 0; i < countof (fcd->ucs_to_mule_table); i++)
6245 fcd->ucs_to_mule_table[i] = Qnil;
6247 staticpro (&mule_to_ucs_table);
6248 mule_to_ucs_table = Fmake_char_table(Qgeneric);
6249 #endif /* defined(MULE) && !defined(UTF2000) */