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 decode_flush_er_chars (struct decoding_stream *str, unsigned_char_dynarr* dst);
2268 decode_flush_er_chars (struct decoding_stream *str, unsigned_char_dynarr* dst)
2270 if ( str->er_counter > 0)
2272 Dynarr_add_many (dst, str->er_buf, str->er_counter);
2273 str->er_counter = 0;
2278 COMPOSE_FLUSH_CHARS (struct decoding_stream *str, unsigned_char_dynarr* dst);
2280 COMPOSE_FLUSH_CHARS (struct decoding_stream *str, unsigned_char_dynarr* dst)
2284 for (i = 0; i < str->combined_char_count; i++)
2285 DECODE_ADD_UCS_CHAR (str->combined_chars[i], dst);
2286 str->combined_char_count = 0;
2287 str->combining_table = Qnil;
2290 void COMPOSE_ADD_CHAR(struct decoding_stream *str, Emchar character,
2291 unsigned_char_dynarr* dst);
2293 COMPOSE_ADD_CHAR(struct decoding_stream *str,
2294 Emchar character, unsigned_char_dynarr* dst)
2296 if (CODING_SYSTEM_DISABLE_COMPOSITION (str->codesys))
2297 DECODE_ADD_UCS_CHAR (character, dst);
2298 else if (!CHAR_TABLEP (str->combining_table))
2301 = get_char_id_table (XCHAR_TABLE(Vcharacter_composition_table),
2305 DECODE_ADD_UCS_CHAR (character, dst);
2308 str->combined_chars[0] = character;
2309 str->combined_char_count = 1;
2310 str->combining_table = ret;
2316 = get_char_id_table (XCHAR_TABLE(str->combining_table),
2321 Emchar char2 = XCHARVAL (ret);
2323 get_char_id_table (XCHAR_TABLE(Vcharacter_composition_table),
2327 DECODE_ADD_UCS_CHAR (char2, dst);
2328 str->combined_char_count = 0;
2329 str->combining_table = Qnil;
2333 str->combined_chars[0] = char2;
2334 str->combined_char_count = 1;
2335 str->combining_table = ret;
2338 else if (CHAR_TABLEP (ret))
2340 str->combined_chars[str->combined_char_count++] = character;
2341 str->combining_table = ret;
2345 COMPOSE_FLUSH_CHARS (str, dst);
2346 DECODE_ADD_UCS_CHAR (character, dst);
2350 #else /* not UTF2000 */
2351 #define COMPOSE_FLUSH_CHARS(str, dst)
2352 #define COMPOSE_ADD_CHAR(str, ch, dst) DECODE_ADD_UCS_CHAR (ch, dst)
2353 #endif /* UTF2000 */
2355 static ssize_t decoding_reader (Lstream *stream,
2356 unsigned char *data, size_t size);
2357 static ssize_t decoding_writer (Lstream *stream,
2358 const unsigned char *data, size_t size);
2359 static int decoding_rewinder (Lstream *stream);
2360 static int decoding_seekable_p (Lstream *stream);
2361 static int decoding_flusher (Lstream *stream);
2362 static int decoding_closer (Lstream *stream);
2364 static Lisp_Object decoding_marker (Lisp_Object stream);
2366 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
2367 sizeof (struct decoding_stream));
2370 decoding_marker (Lisp_Object stream)
2372 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
2373 Lisp_Object str_obj;
2375 /* We do not need to mark the coding systems or charsets stored
2376 within the stream because they are stored in a global list
2377 and automatically marked. */
2379 XSETLSTREAM (str_obj, str);
2380 mark_object (str_obj);
2381 if (str->imp->marker)
2382 return (str->imp->marker) (str_obj);
2387 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
2388 so we read data from the other end, decode it, and store it into DATA. */
2391 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
2393 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2394 unsigned char *orig_data = data;
2396 int error_occurred = 0;
2398 /* We need to interface to mule_decode(), which expects to take some
2399 amount of data and store the result into a Dynarr. We have
2400 mule_decode() store into str->runoff, and take data from there
2403 /* We loop until we have enough data, reading chunks from the other
2404 end and decoding it. */
2407 /* Take data from the runoff if we can. Make sure to take at
2408 most SIZE bytes, and delete the data from the runoff. */
2409 if (Dynarr_length (str->runoff) > 0)
2411 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
2412 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
2413 Dynarr_delete_many (str->runoff, 0, chunk);
2419 break; /* No more room for data */
2421 if (str->flags & CODING_STATE_END)
2422 /* This means that on the previous iteration, we hit the EOF on
2423 the other end. We loop once more so that mule_decode() can
2424 output any final stuff it may be holding, or any "go back
2425 to a sane state" escape sequences. (This latter makes sense
2426 during encoding.) */
2429 /* Exhausted the runoff, so get some more. DATA has at least
2430 SIZE bytes left of storage in it, so it's OK to read directly
2431 into it. (We'll be overwriting above, after we've decoded it
2432 into the runoff.) */
2433 read_size = Lstream_read (str->other_end, data, size);
2440 /* There might be some more end data produced in the translation.
2441 See the comment above. */
2442 str->flags |= CODING_STATE_END;
2443 mule_decode (stream, (Extbyte *) data, str->runoff, read_size);
2446 if (data - orig_data == 0)
2447 return error_occurred ? -1 : 0;
2449 return data - orig_data;
2453 decoding_writer (Lstream *stream, const unsigned char *data, size_t size)
2455 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2458 /* Decode all our data into the runoff, and then attempt to write
2459 it all out to the other end. Remove whatever chunk we succeeded
2461 mule_decode (stream, (Extbyte *) data, str->runoff, size);
2462 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
2463 Dynarr_length (str->runoff));
2465 Dynarr_delete_many (str->runoff, 0, retval);
2466 /* Do NOT return retval. The return value indicates how much
2467 of the incoming data was written, not how many bytes were
2473 reset_decoding_stream (struct decoding_stream *str)
2476 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
2478 Lisp_Object coding_system;
2479 XSETCODING_SYSTEM (coding_system, str->codesys);
2480 reset_iso2022 (coding_system, &str->iso2022);
2482 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
2484 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
2489 str->er_counter = 0;
2490 str->combined_char_count = 0;
2491 str->combining_table = Qnil;
2493 str->flags = str->cpos = 0;
2497 decoding_rewinder (Lstream *stream)
2499 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2500 reset_decoding_stream (str);
2501 Dynarr_reset (str->runoff);
2502 return Lstream_rewind (str->other_end);
2506 decoding_seekable_p (Lstream *stream)
2508 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2509 return Lstream_seekable_p (str->other_end);
2513 decoding_flusher (Lstream *stream)
2515 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2516 return Lstream_flush (str->other_end);
2520 decoding_closer (Lstream *stream)
2522 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2523 if (stream->flags & LSTREAM_FL_WRITE)
2525 str->flags |= CODING_STATE_END;
2526 decoding_writer (stream, 0, 0);
2528 Dynarr_free (str->runoff);
2530 #ifdef ENABLE_COMPOSITE_CHARS
2531 if (str->iso2022.composite_chars)
2532 Dynarr_free (str->iso2022.composite_chars);
2535 return Lstream_close (str->other_end);
2539 decoding_stream_coding_system (Lstream *stream)
2541 Lisp_Object coding_system;
2542 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
2544 XSETCODING_SYSTEM (coding_system, str->codesys);
2545 return subsidiary_coding_system (coding_system, str->eol_type);
2549 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
2551 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
2552 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
2554 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
2555 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
2556 reset_decoding_stream (str);
2559 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
2560 stream for writing, no automatic code detection will be performed.
2561 The reason for this is that automatic code detection requires a
2562 seekable input. Things will also fail if you open a decoding
2563 stream for reading using a non-fully-specified coding system and
2564 a non-seekable input stream. */
2567 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
2570 Lstream *lstr = Lstream_new (lstream_decoding, mode);
2571 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
2575 str->other_end = stream;
2576 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
2577 str->eol_type = EOL_AUTODETECT;
2578 if (!strcmp (mode, "r")
2579 && Lstream_seekable_p (stream))
2580 /* We can determine the coding system now. */
2581 determine_real_coding_system (stream, &codesys, &str->eol_type);
2582 set_decoding_stream_coding_system (lstr, codesys);
2583 str->decst.eol_type = str->eol_type;
2584 str->decst.mask = ~0;
2585 XSETLSTREAM (obj, lstr);
2590 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
2592 return make_decoding_stream_1 (stream, codesys, "r");
2596 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
2598 return make_decoding_stream_1 (stream, codesys, "w");
2601 /* Note: the decode_coding_* functions all take the same
2602 arguments as mule_decode(), which is to say some SRC data of
2603 size N, which is to be stored into dynamic array DST.
2604 DECODING is the stream within which the decoding is
2605 taking place, but no data is actually read from or
2606 written to that stream; that is handled in decoding_reader()
2607 or decoding_writer(). This allows the same functions to
2608 be used for both reading and writing. */
2611 mule_decode (Lstream *decoding, const Extbyte *src,
2612 unsigned_char_dynarr *dst, size_t n)
2614 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
2616 /* If necessary, do encoding-detection now. We do this when
2617 we're a writing stream or a non-seekable reading stream,
2618 meaning that we can't just process the whole input,
2619 rewind, and start over. */
2621 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
2622 str->eol_type == EOL_AUTODETECT)
2624 Lisp_Object codesys;
2626 XSETCODING_SYSTEM (codesys, str->codesys);
2627 detect_coding_type (&str->decst, src, n,
2628 CODING_SYSTEM_TYPE (str->codesys) !=
2629 CODESYS_AUTODETECT);
2630 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
2631 str->decst.mask != ~0)
2632 /* #### This is cheesy. What we really ought to do is
2633 buffer up a certain amount of data so as to get a
2634 less random result. */
2635 codesys = coding_system_from_mask (str->decst.mask);
2636 str->eol_type = str->decst.eol_type;
2637 if (XCODING_SYSTEM (codesys) != str->codesys)
2639 /* Preserve the CODING_STATE_END flag in case it was set.
2640 If we erase it, bad things might happen. */
2641 int was_end = str->flags & CODING_STATE_END;
2642 set_decoding_stream_coding_system (decoding, codesys);
2644 str->flags |= CODING_STATE_END;
2648 switch (CODING_SYSTEM_TYPE (str->codesys))
2651 case CODESYS_INTERNAL:
2652 Dynarr_add_many (dst, src, n);
2655 case CODESYS_AUTODETECT:
2656 /* If we got this far and still haven't decided on the coding
2657 system, then do no conversion. */
2658 case CODESYS_NO_CONVERSION:
2659 decode_coding_no_conversion (decoding, src, dst, n);
2662 case CODESYS_SHIFT_JIS:
2663 decode_coding_sjis (decoding, src, dst, n);
2666 decode_coding_big5 (decoding, src, dst, n);
2669 decode_coding_ucs4 (decoding, src, dst, n);
2672 decode_coding_utf8 (decoding, src, dst, n);
2675 str->ccl.last_block = str->flags & CODING_STATE_END;
2676 /* When applying ccl program to stream, MUST NOT set NULL
2678 ccl_driver (&str->ccl, (src ? (unsigned char *)src : (unsigned char*)""),
2679 dst, n, 0, CCL_MODE_DECODING);
2681 case CODESYS_ISO2022:
2682 decode_coding_iso2022 (decoding, src, dst, n);
2690 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
2691 Decode the text between START and END which is encoded in CODING-SYSTEM.
2692 This is useful if you've read in encoded text from a file without decoding
2693 it (e.g. you read in a JIS-formatted file but used the `binary' or
2694 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
2695 Return length of decoded text.
2696 BUFFER defaults to the current buffer if unspecified.
2698 (start, end, coding_system, buffer))
2701 struct buffer *buf = decode_buffer (buffer, 0);
2702 Lisp_Object instream, lb_outstream, de_outstream, outstream;
2703 Lstream *istr, *ostr;
2704 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
2706 get_buffer_range_char (buf, start, end, &b, &e, 0);
2708 barf_if_buffer_read_only (buf, b, e);
2710 coding_system = Fget_coding_system (coding_system);
2711 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
2712 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
2713 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
2715 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
2716 Fget_coding_system (Qbinary));
2717 istr = XLSTREAM (instream);
2718 ostr = XLSTREAM (outstream);
2719 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
2721 /* The chain of streams looks like this:
2723 [BUFFER] <----- send through
2724 ------> [ENCODE AS BINARY]
2725 ------> [DECODE AS SPECIFIED]
2731 char tempbuf[1024]; /* some random amount */
2732 Bufpos newpos, even_newer_pos;
2733 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
2734 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
2738 newpos = lisp_buffer_stream_startpos (istr);
2739 Lstream_write (ostr, tempbuf, size_in_bytes);
2740 even_newer_pos = lisp_buffer_stream_startpos (istr);
2741 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
2744 Lstream_close (istr);
2745 Lstream_close (ostr);
2747 Lstream_delete (istr);
2748 Lstream_delete (ostr);
2749 Lstream_delete (XLSTREAM (de_outstream));
2750 Lstream_delete (XLSTREAM (lb_outstream));
2755 /************************************************************************/
2756 /* Converting to an external encoding ("encoding") */
2757 /************************************************************************/
2759 /* An encoding stream is an output stream. When you create the
2760 stream, you specify the coding system that governs the encoding
2761 and another stream that the resulting encoded data is to be
2762 sent to, and then start sending data to it. */
2764 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
2766 struct encoding_stream
2768 /* Coding system that governs the conversion. */
2769 Lisp_Coding_System *codesys;
2771 /* Stream that we read the encoded data from or
2772 write the decoded data to. */
2775 /* If we are reading, then we can return only a fixed amount of
2776 data, so if the conversion resulted in too much data, we store it
2777 here for retrieval the next time around. */
2778 unsigned_char_dynarr *runoff;
2780 /* FLAGS holds flags indicating the current state of the encoding.
2781 Some of these flags are dependent on the coding system. */
2784 /* CH holds a partially built-up character. Since we only deal
2785 with one- and two-byte characters at the moment, we only use
2786 this to store the first byte of a two-byte character. */
2789 /* Additional information used by the ISO2022 encoder. */
2792 /* CHARSET holds the character sets currently assigned to the G0
2793 through G3 registers. It is initialized from the array
2794 INITIAL_CHARSET in CODESYS. */
2795 Lisp_Object charset[4];
2797 /* Which registers are currently invoked into the left (GL) and
2798 right (GR) halves of the 8-bit encoding space? */
2799 int register_left, register_right;
2801 /* Whether we need to explicitly designate the charset in the
2802 G? register before using it. It is initialized from the
2803 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
2804 unsigned char force_charset_on_output[4];
2806 /* Other state variables that need to be preserved across
2808 Lisp_Object current_charset;
2810 int current_char_boundary;
2813 void (*encode_char) (struct encoding_stream *str, Emchar c,
2814 unsigned_char_dynarr *dst, unsigned int *flags);
2815 void (*finish) (struct encoding_stream *str,
2816 unsigned_char_dynarr *dst, unsigned int *flags);
2818 /* Additional information (the state of the running CCL program)
2819 used by the CCL encoder. */
2820 struct ccl_program ccl;
2824 static ssize_t encoding_reader (Lstream *stream, unsigned char *data, size_t size);
2825 static ssize_t encoding_writer (Lstream *stream, const unsigned char *data,
2827 static int encoding_rewinder (Lstream *stream);
2828 static int encoding_seekable_p (Lstream *stream);
2829 static int encoding_flusher (Lstream *stream);
2830 static int encoding_closer (Lstream *stream);
2832 static Lisp_Object encoding_marker (Lisp_Object stream);
2834 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
2835 sizeof (struct encoding_stream));
2838 encoding_marker (Lisp_Object stream)
2840 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
2841 Lisp_Object str_obj;
2843 /* We do not need to mark the coding systems or charsets stored
2844 within the stream because they are stored in a global list
2845 and automatically marked. */
2847 XSETLSTREAM (str_obj, str);
2848 mark_object (str_obj);
2849 if (str->imp->marker)
2850 return (str->imp->marker) (str_obj);
2855 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
2856 so we read data from the other end, encode it, and store it into DATA. */
2859 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
2861 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2862 unsigned char *orig_data = data;
2864 int error_occurred = 0;
2866 /* We need to interface to mule_encode(), which expects to take some
2867 amount of data and store the result into a Dynarr. We have
2868 mule_encode() store into str->runoff, and take data from there
2871 /* We loop until we have enough data, reading chunks from the other
2872 end and encoding it. */
2875 /* Take data from the runoff if we can. Make sure to take at
2876 most SIZE bytes, and delete the data from the runoff. */
2877 if (Dynarr_length (str->runoff) > 0)
2879 int chunk = min ((int) size, Dynarr_length (str->runoff));
2880 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
2881 Dynarr_delete_many (str->runoff, 0, chunk);
2887 break; /* No more room for data */
2889 if (str->flags & CODING_STATE_END)
2890 /* This means that on the previous iteration, we hit the EOF on
2891 the other end. We loop once more so that mule_encode() can
2892 output any final stuff it may be holding, or any "go back
2893 to a sane state" escape sequences. (This latter makes sense
2894 during encoding.) */
2897 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
2898 left of storage in it, so it's OK to read directly into it.
2899 (We'll be overwriting above, after we've encoded it into the
2901 read_size = Lstream_read (str->other_end, data, size);
2908 /* There might be some more end data produced in the translation.
2909 See the comment above. */
2910 str->flags |= CODING_STATE_END;
2911 mule_encode (stream, data, str->runoff, read_size);
2914 if (data == orig_data)
2915 return error_occurred ? -1 : 0;
2917 return data - orig_data;
2921 encoding_writer (Lstream *stream, const unsigned char *data, size_t size)
2923 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2926 /* Encode all our data into the runoff, and then attempt to write
2927 it all out to the other end. Remove whatever chunk we succeeded
2929 mule_encode (stream, data, str->runoff, size);
2930 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
2931 Dynarr_length (str->runoff));
2933 Dynarr_delete_many (str->runoff, 0, retval);
2934 /* Do NOT return retval. The return value indicates how much
2935 of the incoming data was written, not how many bytes were
2941 reset_encoding_stream (struct encoding_stream *str)
2944 switch (CODING_SYSTEM_TYPE (str->codesys))
2946 case CODESYS_ISO2022:
2950 str->encode_char = &char_encode_iso2022;
2951 str->finish = &char_finish_iso2022;
2952 for (i = 0; i < 4; i++)
2954 str->iso2022.charset[i] =
2955 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
2956 str->iso2022.force_charset_on_output[i] =
2957 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
2959 str->iso2022.register_left = 0;
2960 str->iso2022.register_right = 1;
2961 str->iso2022.current_charset = Qnil;
2962 str->iso2022.current_half = 0;
2966 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
2969 str->encode_char = &char_encode_utf8;
2970 str->finish = &char_finish_utf8;
2973 str->encode_char = &char_encode_ucs4;
2974 str->finish = &char_finish_ucs4;
2976 case CODESYS_SHIFT_JIS:
2977 str->encode_char = &char_encode_shift_jis;
2978 str->finish = &char_finish_shift_jis;
2981 str->encode_char = &char_encode_big5;
2982 str->finish = &char_finish_big5;
2988 str->iso2022.current_char_boundary = 0;
2989 str->flags = str->ch = 0;
2993 encoding_rewinder (Lstream *stream)
2995 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
2996 reset_encoding_stream (str);
2997 Dynarr_reset (str->runoff);
2998 return Lstream_rewind (str->other_end);
3002 encoding_seekable_p (Lstream *stream)
3004 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3005 return Lstream_seekable_p (str->other_end);
3009 encoding_flusher (Lstream *stream)
3011 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3012 return Lstream_flush (str->other_end);
3016 encoding_closer (Lstream *stream)
3018 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3019 if (stream->flags & LSTREAM_FL_WRITE)
3021 str->flags |= CODING_STATE_END;
3022 encoding_writer (stream, 0, 0);
3024 Dynarr_free (str->runoff);
3025 return Lstream_close (str->other_end);
3029 encoding_stream_coding_system (Lstream *stream)
3031 Lisp_Object coding_system;
3032 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
3034 XSETCODING_SYSTEM (coding_system, str->codesys);
3035 return coding_system;
3039 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
3041 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
3042 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
3044 reset_encoding_stream (str);
3048 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
3051 Lstream *lstr = Lstream_new (lstream_encoding, mode);
3052 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
3056 str->runoff = Dynarr_new (unsigned_char);
3057 str->other_end = stream;
3058 set_encoding_stream_coding_system (lstr, codesys);
3059 XSETLSTREAM (obj, lstr);
3064 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
3066 return make_encoding_stream_1 (stream, codesys, "r");
3070 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
3072 return make_encoding_stream_1 (stream, codesys, "w");
3075 /* Convert N bytes of internally-formatted data stored in SRC to an
3076 external format, according to the encoding stream ENCODING.
3077 Store the encoded data into DST. */
3080 mule_encode (Lstream *encoding, const Bufbyte *src,
3081 unsigned_char_dynarr *dst, size_t n)
3083 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
3085 switch (CODING_SYSTEM_TYPE (str->codesys))
3088 case CODESYS_INTERNAL:
3089 Dynarr_add_many (dst, src, n);
3092 case CODESYS_AUTODETECT:
3093 /* If we got this far and still haven't decided on the coding
3094 system, then do no conversion. */
3095 case CODESYS_NO_CONVERSION:
3096 encode_coding_no_conversion (encoding, src, dst, n);
3100 str->ccl.last_block = str->flags & CODING_STATE_END;
3101 /* When applying ccl program to stream, MUST NOT set NULL
3103 ccl_driver (&str->ccl, ((src) ? src : (unsigned char*)""),
3104 dst, n, 0, CCL_MODE_ENCODING);
3108 text_encode_generic (encoding, src, dst, n);
3112 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
3113 Encode the text between START and END using CODING-SYSTEM.
3114 This will, for example, convert Japanese characters into stuff such as
3115 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
3116 text. BUFFER defaults to the current buffer if unspecified.
3118 (start, end, coding_system, buffer))
3121 struct buffer *buf = decode_buffer (buffer, 0);
3122 Lisp_Object instream, lb_outstream, de_outstream, outstream;
3123 Lstream *istr, *ostr;
3124 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
3126 get_buffer_range_char (buf, start, end, &b, &e, 0);
3128 barf_if_buffer_read_only (buf, b, e);
3130 coding_system = Fget_coding_system (coding_system);
3131 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
3132 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
3133 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
3134 Fget_coding_system (Qbinary));
3135 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
3137 istr = XLSTREAM (instream);
3138 ostr = XLSTREAM (outstream);
3139 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
3140 /* The chain of streams looks like this:
3142 [BUFFER] <----- send through
3143 ------> [ENCODE AS SPECIFIED]
3144 ------> [DECODE AS BINARY]
3149 char tempbuf[1024]; /* some random amount */
3150 Bufpos newpos, even_newer_pos;
3151 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
3152 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
3156 newpos = lisp_buffer_stream_startpos (istr);
3157 Lstream_write (ostr, tempbuf, size_in_bytes);
3158 even_newer_pos = lisp_buffer_stream_startpos (istr);
3159 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
3165 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
3166 Lstream_close (istr);
3167 Lstream_close (ostr);
3169 Lstream_delete (istr);
3170 Lstream_delete (ostr);
3171 Lstream_delete (XLSTREAM (de_outstream));
3172 Lstream_delete (XLSTREAM (lb_outstream));
3173 return make_int (retlen);
3180 text_encode_generic (Lstream *encoding, const Bufbyte *src,
3181 unsigned_char_dynarr *dst, size_t n)
3184 unsigned char char_boundary;
3185 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
3186 unsigned int flags = str->flags;
3187 Emchar ch = str->ch;
3189 char_boundary = str->iso2022.current_char_boundary;
3195 if (char_boundary == 0)
3223 (*str->encode_char) (str, c, dst, &flags);
3225 else if (char_boundary == 1)
3227 (*str->encode_char) (str, (ch << 6) | (c & 0x3f), dst, &flags);
3233 ch = (ch << 6) | (c & 0x3f);
3238 if ((char_boundary == 0) && (flags & CODING_STATE_END))
3240 (*str->finish) (str, dst, &flags);
3245 str->iso2022.current_char_boundary = char_boundary;
3249 /************************************************************************/
3250 /* Shift-JIS methods */
3251 /************************************************************************/
3253 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
3254 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
3255 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
3256 encoded by "position-code + 0x80". A character of JISX0208
3257 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
3258 position-codes are divided and shifted so that it fit in the range
3261 --- CODE RANGE of Shift-JIS ---
3262 (character set) (range)
3264 JISX0201-Kana 0xA0 .. 0xDF
3265 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
3266 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
3267 -------------------------------
3271 /* Is this the first byte of a Shift-JIS two-byte char? */
3273 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
3274 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
3276 /* Is this the second byte of a Shift-JIS two-byte char? */
3278 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
3279 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
3281 #define BYTE_SJIS_KATAKANA_P(c) \
3282 ((c) >= 0xA1 && (c) <= 0xDF)
3285 detect_coding_sjis (struct detection_state *st, const Extbyte *src, size_t n)
3289 unsigned char c = *(unsigned char *)src++;
3290 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
3292 if (st->shift_jis.in_second_byte)
3294 st->shift_jis.in_second_byte = 0;
3298 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
3299 st->shift_jis.in_second_byte = 1;
3301 return CODING_CATEGORY_SHIFT_JIS_MASK;
3304 /* Convert Shift-JIS data to internal format. */
3307 decode_coding_sjis (Lstream *decoding, const Extbyte *src,
3308 unsigned_char_dynarr *dst, size_t n)
3310 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3311 unsigned int flags = str->flags;
3312 unsigned int cpos = str->cpos;
3313 eol_type_t eol_type = str->eol_type;
3317 unsigned char c = *(unsigned char *)src++;
3321 /* Previous character was first byte of Shift-JIS Kanji char. */
3322 if (BYTE_SJIS_TWO_BYTE_2_P (c))
3324 unsigned char e1, e2;
3326 DECODE_SJIS (cpos, c, e1, e2);
3328 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_japanese_jisx0208,
3332 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
3333 Dynarr_add (dst, e1);
3334 Dynarr_add (dst, e2);
3339 DECODE_ADD_BINARY_CHAR (cpos, dst);
3340 DECODE_ADD_BINARY_CHAR (c, dst);
3346 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
3347 if (BYTE_SJIS_TWO_BYTE_1_P (c))
3349 else if (BYTE_SJIS_KATAKANA_P (c))
3352 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_katakana_jisx0201,
3355 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
3356 Dynarr_add (dst, c);
3361 DECODE_ADD_UCS_CHAR(MAKE_CHAR(Vcharset_latin_jisx0201,
3365 DECODE_ADD_BINARY_CHAR (c, dst);
3367 label_continue_loop:;
3370 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
3376 /* Convert internal character representation to Shift_JIS. */
3379 char_encode_shift_jis (struct encoding_stream *str, Emchar ch,
3380 unsigned_char_dynarr *dst, unsigned int *flags)
3382 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
3386 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
3387 Dynarr_add (dst, '\r');
3388 if (eol_type != EOL_CR)
3389 Dynarr_add (dst, ch);
3393 unsigned int s1, s2;
3395 int code_point = charset_code_point (Vcharset_latin_jisx0201, ch);
3397 if (code_point >= 0)
3398 Dynarr_add (dst, code_point);
3399 else if ((code_point
3400 = charset_code_point (Vcharset_japanese_jisx0208_1990, ch))
3403 ENCODE_SJIS ((code_point >> 8) | 0x80,
3404 (code_point & 0xFF) | 0x80, s1, s2);
3405 Dynarr_add (dst, s1);
3406 Dynarr_add (dst, s2);
3408 else if ((code_point
3409 = charset_code_point (Vcharset_katakana_jisx0201, ch))
3411 Dynarr_add (dst, code_point | 0x80);
3412 else if ((code_point
3413 = charset_code_point (Vcharset_japanese_jisx0208, ch))
3416 ENCODE_SJIS ((code_point >> 8) | 0x80,
3417 (code_point & 0xFF) | 0x80, s1, s2);
3418 Dynarr_add (dst, s1);
3419 Dynarr_add (dst, s2);
3421 else if ((code_point = charset_code_point (Vcharset_ascii, ch))
3423 Dynarr_add (dst, code_point);
3425 Dynarr_add (dst, '?');
3427 Lisp_Object charset;
3428 unsigned int c1, c2;
3430 BREAKUP_CHAR (ch, charset, c1, c2);
3432 if (EQ(charset, Vcharset_katakana_jisx0201))
3434 Dynarr_add (dst, c1 | 0x80);
3438 Dynarr_add (dst, c1);
3440 else if (EQ(charset, Vcharset_japanese_jisx0208))
3442 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
3443 Dynarr_add (dst, s1);
3444 Dynarr_add (dst, s2);
3447 Dynarr_add (dst, '?');
3453 char_finish_shift_jis (struct encoding_stream *str, unsigned_char_dynarr *dst,
3454 unsigned int *flags)
3458 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
3459 Decode a JISX0208 character of Shift-JIS coding-system.
3460 CODE is the character code in Shift-JIS as a cons of type bytes.
3461 Return the corresponding character.
3465 unsigned char c1, c2, s1, s2;
3468 CHECK_INT (XCAR (code));
3469 CHECK_INT (XCDR (code));
3470 s1 = XINT (XCAR (code));
3471 s2 = XINT (XCDR (code));
3472 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
3473 BYTE_SJIS_TWO_BYTE_2_P (s2))
3475 DECODE_SJIS (s1, s2, c1, c2);
3476 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
3477 c1 & 0x7F, c2 & 0x7F));
3483 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
3484 Encode a JISX0208 character CHARACTER to SHIFT-JIS coding-system.
3485 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
3489 Lisp_Object charset;
3492 CHECK_CHAR_COERCE_INT (character);
3493 BREAKUP_CHAR (XCHAR (character), charset, c1, c2);
3494 if (EQ (charset, Vcharset_japanese_jisx0208))
3496 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
3497 return Fcons (make_int (s1), make_int (s2));
3504 /************************************************************************/
3506 /************************************************************************/
3508 /* BIG5 is a coding system encoding two character sets: ASCII and
3509 Big5. An ASCII character is encoded as is. Big5 is a two-byte
3510 character set and is encoded in two-byte.
3512 --- CODE RANGE of BIG5 ---
3513 (character set) (range)
3515 Big5 (1st byte) 0xA1 .. 0xFE
3516 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
3517 --------------------------
3519 Since the number of characters in Big5 is larger than maximum
3520 characters in Emacs' charset (96x96), it can't be handled as one
3521 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
3522 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
3523 contains frequently used characters and the latter contains less
3524 frequently used characters. */
3527 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
3528 ((c) >= 0x81 && (c) <= 0xFE)
3530 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
3531 ((c) >= 0xA1 && (c) <= 0xFE)
3534 /* Is this the second byte of a Shift-JIS two-byte char? */
3536 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
3537 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
3539 /* Number of Big5 characters which have the same code in 1st byte. */
3541 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
3543 /* Code conversion macros. These are macros because they are used in
3544 inner loops during code conversion.
3546 Note that temporary variables in macros introduce the classic
3547 dynamic-scoping problems with variable names. We use capital-
3548 lettered variables in the assumption that XEmacs does not use
3549 capital letters in variables except in a very formalized way
3552 /* Convert Big5 code (b1, b2) into its internal string representation
3555 /* There is a much simpler way to split the Big5 charset into two.
3556 For the moment I'm going to leave the algorithm as-is because it
3557 claims to separate out the most-used characters into a single
3558 charset, which perhaps will lead to optimizations in various
3561 The way the algorithm works is something like this:
3563 Big5 can be viewed as a 94x157 charset, where the row is
3564 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
3565 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
3566 the split between low and high column numbers is apparently
3567 meaningless; ascending rows produce less and less frequent chars.
3568 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
3569 the first charset, and the upper half (0xC9 .. 0xFE) to the
3570 second. To do the conversion, we convert the character into
3571 a single number where 0 .. 156 is the first row, 157 .. 313
3572 is the second, etc. That way, the characters are ordered by
3573 decreasing frequency. Then we just chop the space in two
3574 and coerce the result into a 94x94 space.
3577 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
3579 int B1 = b1, B2 = b2; \
3581 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
3585 lb = LEADING_BYTE_CHINESE_BIG5_1; \
3589 lb = LEADING_BYTE_CHINESE_BIG5_2; \
3590 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
3592 c1 = I / (0xFF - 0xA1) + 0xA1; \
3593 c2 = I % (0xFF - 0xA1) + 0xA1; \
3596 /* Convert the internal string representation of a Big5 character
3597 (lb, c1, c2) into Big5 code (b1, b2). */
3599 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
3601 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
3603 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
3605 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
3607 b1 = I / BIG5_SAME_ROW + 0xA1; \
3608 b2 = I % BIG5_SAME_ROW; \
3609 b2 += b2 < 0x3F ? 0x40 : 0x62; \
3613 detect_coding_big5 (struct detection_state *st, const Extbyte *src, size_t n)
3617 unsigned char c = *(unsigned char *)src++;
3618 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO
3620 || (c >= 0x80 && c <= 0xA0)
3624 if (st->big5.in_second_byte)
3626 st->big5.in_second_byte = 0;
3627 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
3637 st->big5.in_second_byte = 1;
3639 return CODING_CATEGORY_BIG5_MASK;
3642 /* Convert Big5 data to internal format. */
3645 decode_coding_big5 (Lstream *decoding, const Extbyte *src,
3646 unsigned_char_dynarr *dst, size_t n)
3648 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3649 unsigned int flags = str->flags;
3650 unsigned int cpos = str->cpos;
3651 eol_type_t eol_type = str->eol_type;
3654 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (DECODING_STREAM_DATA
3655 (decoding)->codesys, 1);
3660 unsigned char c = *(unsigned char *)src++;
3663 /* Previous character was first byte of Big5 char. */
3664 if (BYTE_BIG5_TWO_BYTE_2_P (c))
3667 int code_point = (cpos << 8) | c;
3668 Emchar char_id = decode_defined_char (ccs, code_point);
3671 char_id = DECODE_CHAR (Vcharset_chinese_big5, code_point);
3672 DECODE_ADD_UCS_CHAR (char_id, dst);
3674 unsigned char b1, b2, b3;
3675 DECODE_BIG5 (cpos, c, b1, b2, b3);
3676 Dynarr_add (dst, b1);
3677 Dynarr_add (dst, b2);
3678 Dynarr_add (dst, b3);
3683 DECODE_ADD_BINARY_CHAR (cpos, dst);
3684 DECODE_ADD_BINARY_CHAR (c, dst);
3690 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
3691 if (BYTE_BIG5_TWO_BYTE_1_P (c))
3694 DECODE_ADD_BINARY_CHAR (c, dst);
3696 label_continue_loop:;
3699 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
3705 /* Convert internally-formatted data to Big5. */
3708 char_encode_big5 (struct encoding_stream *str, Emchar ch,
3709 unsigned_char_dynarr *dst, unsigned int *flags)
3711 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
3715 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
3716 Dynarr_add (dst, '\r');
3717 if (eol_type != EOL_CR)
3718 Dynarr_add (dst, ch);
3725 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, 1);
3727 if ((code_point = charset_code_point (Vcharset_ascii, ch)) >= 0)
3728 Dynarr_add (dst, code_point);
3729 else if ((code_point = charset_code_point (ccs, ch)) >= 0)
3731 Dynarr_add (dst, code_point >> 8);
3732 Dynarr_add (dst, code_point & 0xFF);
3734 else if ((code_point
3735 = charset_code_point (Vcharset_chinese_big5, ch)) >= 0)
3737 Dynarr_add (dst, code_point >> 8);
3738 Dynarr_add (dst, code_point & 0xFF);
3740 else if ((code_point
3741 = charset_code_point (Vcharset_chinese_big5_1, ch)) >= 0)
3744 = ((code_point >> 8) - 33) * (0xFF - 0xA1)
3745 + ((code_point & 0xFF) - 33);
3746 unsigned char b1 = I / BIG5_SAME_ROW + 0xA1;
3747 unsigned char b2 = I % BIG5_SAME_ROW;
3749 b2 += b2 < 0x3F ? 0x40 : 0x62;
3750 Dynarr_add (dst, b1);
3751 Dynarr_add (dst, b2);
3753 else if ((code_point
3754 = charset_code_point (Vcharset_chinese_big5_2, ch)) >= 0)
3757 = ((code_point >> 8) - 33) * (0xFF - 0xA1)
3758 + ((code_point & 0xFF) - 33);
3759 unsigned char b1, b2;
3761 I += BIG5_SAME_ROW * (0xC9 - 0xA1);
3762 b1 = I / BIG5_SAME_ROW + 0xA1;
3763 b2 = I % BIG5_SAME_ROW;
3764 b2 += b2 < 0x3F ? 0x40 : 0x62;
3765 Dynarr_add (dst, b1);
3766 Dynarr_add (dst, b2);
3769 Dynarr_add (dst, '?');
3776 char_finish_big5 (struct encoding_stream *str, unsigned_char_dynarr *dst,
3777 unsigned int *flags)
3782 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
3783 Decode a Big5 character CODE of BIG5 coding-system.
3784 CODE is the character code in BIG5, a cons of two integers.
3785 Return the corresponding character.
3789 unsigned char c1, c2, b1, b2;
3792 CHECK_INT (XCAR (code));
3793 CHECK_INT (XCDR (code));
3794 b1 = XINT (XCAR (code));
3795 b2 = XINT (XCDR (code));
3796 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
3797 BYTE_BIG5_TWO_BYTE_2_P (b2))
3799 Charset_ID leading_byte;
3800 Lisp_Object charset;
3801 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
3802 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
3803 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
3809 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
3810 Encode the Big5 character CHARACTER in the BIG5 coding-system.
3811 Return the corresponding character code in Big5.
3815 Lisp_Object charset;
3818 CHECK_CHAR_COERCE_INT (character);
3819 BREAKUP_CHAR (XCHAR (character), charset, c1, c2);
3820 if (EQ (charset, Vcharset_chinese_big5_1) ||
3821 EQ (charset, Vcharset_chinese_big5_2))
3823 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
3825 return Fcons (make_int (b1), make_int (b2));
3832 /************************************************************************/
3834 /************************************************************************/
3837 detect_coding_ucs4 (struct detection_state *st, const Extbyte *src, size_t n)
3841 unsigned char c = *(unsigned char *)src++;
3842 switch (st->ucs4.in_byte)
3851 st->ucs4.in_byte = 0;
3857 return CODING_CATEGORY_UCS4_MASK;
3861 decode_coding_ucs4 (Lstream *decoding, const Extbyte *src,
3862 unsigned_char_dynarr *dst, size_t n)
3864 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
3865 unsigned int flags = str->flags;
3866 unsigned int cpos = str->cpos;
3867 unsigned char counter = str->counter;
3871 unsigned char c = *(unsigned char *)src++;
3879 DECODE_ADD_UCS_CHAR ((cpos << 8) | c, dst);
3884 cpos = ( cpos << 8 ) | c;
3888 if (counter & CODING_STATE_END)
3889 DECODE_OUTPUT_PARTIAL_CHAR (cpos);
3893 str->counter = counter;
3897 char_encode_ucs4 (struct encoding_stream *str, Emchar ch,
3898 unsigned_char_dynarr *dst, unsigned int *flags)
3900 Dynarr_add (dst, ch >> 24);
3901 Dynarr_add (dst, ch >> 16);
3902 Dynarr_add (dst, ch >> 8);
3903 Dynarr_add (dst, ch );
3907 char_finish_ucs4 (struct encoding_stream *str, unsigned_char_dynarr *dst,
3908 unsigned int *flags)
3913 /************************************************************************/
3915 /************************************************************************/
3918 detect_coding_utf8 (struct detection_state *st, const Extbyte *src, size_t n)
3922 unsigned char c = *(unsigned char *)src++;
3923 switch (st->utf8.in_byte)
3926 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
3929 st->utf8.in_byte = 5;
3931 st->utf8.in_byte = 4;
3933 st->utf8.in_byte = 3;
3935 st->utf8.in_byte = 2;
3937 st->utf8.in_byte = 1;
3942 if ((c & 0xc0) != 0x80)
3948 return CODING_CATEGORY_UTF8_MASK;
3952 decode_output_utf8_partial_char (unsigned char counter,
3954 unsigned_char_dynarr *dst)
3957 DECODE_ADD_BINARY_CHAR ( (cpos|0xFC), dst);
3958 else if (counter == 4)
3960 if (cpos < (1 << 6))
3961 DECODE_ADD_BINARY_CHAR ( (cpos|0xF8), dst);
3964 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xFC), dst);
3965 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3968 else if (counter == 3)
3970 if (cpos < (1 << 6))
3971 DECODE_ADD_BINARY_CHAR ( (cpos|0xF0), dst);
3972 else if (cpos < (1 << 12))
3974 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xF8), dst);
3975 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3979 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xFC), dst);
3980 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
3981 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
3984 else if (counter == 2)
3986 if (cpos < (1 << 6))
3987 DECODE_ADD_BINARY_CHAR ( (cpos|0xE0), dst);
3988 else if (cpos < (1 << 12))
3990 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xF0), dst);
3991 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
3993 else if (cpos < (1 << 18))
3995 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xF8), dst);
3996 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
3997 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4001 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 18)|0xFC), dst);
4002 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
4003 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4004 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4009 if (cpos < (1 << 6))
4010 DECODE_ADD_BINARY_CHAR ( (cpos|0xC0), dst);
4011 else if (cpos < (1 << 12))
4013 DECODE_ADD_BINARY_CHAR ( ((cpos >> 6)|0xE0), dst);
4014 DECODE_ADD_BINARY_CHAR ( ((cpos&0x3F)|0x80), dst);
4016 else if (cpos < (1 << 18))
4018 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 12)|0xF0), dst);
4019 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4020 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4022 else if (cpos < (1 << 24))
4024 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 18)|0xF8), dst);
4025 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
4026 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4027 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4031 DECODE_ADD_BINARY_CHAR ( ( (cpos >> 24)|0xFC), dst);
4032 DECODE_ADD_BINARY_CHAR ( (((cpos >> 18)&0x3F)|0x80), dst);
4033 DECODE_ADD_BINARY_CHAR ( (((cpos >> 12)&0x3F)|0x80), dst);
4034 DECODE_ADD_BINARY_CHAR ( (((cpos >> 6)&0x3F)|0x80), dst);
4035 DECODE_ADD_BINARY_CHAR ( ( (cpos &0x3F)|0x80), dst);
4041 decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
4042 unsigned_char_dynarr *dst, size_t n)
4044 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
4045 unsigned int flags = str->flags;
4046 unsigned int cpos = str->cpos;
4047 eol_type_t eol_type = str->eol_type;
4048 unsigned char counter = str->counter;
4052 unsigned char c = *(unsigned char *)src++;
4057 decode_flush_er_chars (str, dst);
4058 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
4059 DECODE_ADD_UCS_CHAR (c, dst);
4061 else if ( c < 0xC0 )
4063 if (str->er_counter == 0)
4065 if (CODING_SYSTEM_USE_ENTITY_REFERENCE (str->codesys)
4068 str->er_buf[0] = '&';
4072 DECODE_ADD_UCS_CHAR (c, dst);
4076 Lisp_Object string = make_string (str->er_buf,
4078 Lisp_Object rest = Vcoded_charset_entity_reference_alist;
4085 while (!NILP (rest))
4089 if (NILP (ccs = Ffind_charset (ccs)))
4104 pat = concat3 (build_string ("^&"),
4105 pat, build_string ("\\([0-9]+\\)$"));
4108 else if (EQ (ret, Qx))
4110 pat = concat3 (build_string ("^&"),
4112 build_string ("\\([0-9a-f]+\\)$"));
4115 else if (EQ (ret, QX))
4117 pat = concat3 (build_string ("^&"),
4119 build_string ("\\([0-9A-F]+\\)$"));
4125 if (!NILP (Fstring_match (pat, string, Qnil, Qnil)))
4128 = XINT (Fstring_to_number
4129 (Fsubstring (string,
4132 Fmatch_end (make_int (1))),
4135 DECODE_ADD_UCS_CHAR (DECODE_CHAR (ccs, code), dst);
4140 if (!NILP (Fstring_match
4141 (build_string ("^&MCS-\\([0-9A-F]+\\)$"),
4142 string, Qnil, Qnil)))
4145 = XINT (Fstring_to_number
4146 (Fsubstring (string,
4149 Fmatch_end (make_int (1))),
4152 DECODE_ADD_UCS_CHAR (code, dst);
4156 Dynarr_add_many (dst, str->er_buf, str->er_counter);
4157 Dynarr_add (dst, ';');
4160 str->er_counter = 0;
4162 else if ( (str->er_counter >= 16) || (c >= 0x7F) )
4164 Dynarr_add_many (dst, str->er_buf, str->er_counter);
4165 str->er_counter = 0;
4166 DECODE_ADD_UCS_CHAR (c, dst);
4169 str->er_buf[str->er_counter++] = c;
4173 Dynarr_add_many (dst, str->er_buf, str->er_counter);
4174 str->er_counter = 0;
4180 else if ( c < 0xF0 )
4185 else if ( c < 0xF8 )
4190 else if ( c < 0xFC )
4202 else if ( (c & 0xC0) == 0x80 )
4204 cpos = ( cpos << 6 ) | ( c & 0x3f );
4207 DECODE_ADD_UCS_CHAR (cpos, dst);
4216 decode_output_utf8_partial_char (counter, cpos, dst);
4217 DECODE_ADD_BINARY_CHAR (c, dst);
4221 label_continue_loop:;
4224 if (flags & CODING_STATE_END)
4226 decode_flush_er_chars (str, dst);
4229 decode_output_utf8_partial_char (counter, cpos, dst);
4236 str->counter = counter;
4240 char_encode_utf8 (struct encoding_stream *str, Emchar ch,
4241 unsigned_char_dynarr *dst, unsigned int *flags)
4243 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
4247 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
4248 Dynarr_add (dst, '\r');
4249 if (eol_type != EOL_CR)
4250 Dynarr_add (dst, ch);
4252 else if (ch <= 0x7f)
4254 Dynarr_add (dst, ch);
4258 int code_point = charset_code_point (Vcharset_ucs, ch);
4260 if ( (code_point < 0) || (code_point > 0x10FFFF) )
4262 if (CODING_SYSTEM_USE_ENTITY_REFERENCE (str->codesys))
4264 Lisp_Object rest = Vcoded_charset_entity_reference_alist;
4268 int format_columns, idx;
4269 char buf[16], format[16];
4271 while (!NILP (rest))
4275 if (!NILP (ccs = Ffind_charset (ccs)))
4278 = charset_code_point (ccs, ch)) >= 0 )
4283 && ((idx =XSTRING_LENGTH (ret)) <= 6))
4285 strncpy (format, XSTRING_DATA (ret), idx);
4294 format [idx++] = '%';
4295 format_columns = XINT (ret);
4296 if ( (2 <= format_columns)
4297 && (format_columns <= 8) )
4299 format [idx++] = '0';
4300 format [idx++] = '0' + format_columns;
4307 format [idx++] = 'd';
4308 else if (EQ (ret, Qx))
4309 format [idx++] = 'x';
4310 else if (EQ (ret, QX))
4311 format [idx++] = 'X';
4316 sprintf (buf, format, code_point);
4317 Dynarr_add (dst, '&');
4318 Dynarr_add_many (dst, buf, strlen (buf));
4319 Dynarr_add (dst, ';');
4325 sprintf (buf, "&MCS-%08X;", ch);
4326 Dynarr_add_many (dst, buf, strlen (buf));
4332 if (code_point <= 0x7ff)
4334 Dynarr_add (dst, (code_point >> 6) | 0xc0);
4335 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4337 else if (code_point <= 0xffff)
4339 Dynarr_add (dst, (code_point >> 12) | 0xe0);
4340 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4341 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4343 else if (code_point <= 0x1fffff)
4345 Dynarr_add (dst, (code_point >> 18) | 0xf0);
4346 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4347 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4348 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4350 else if (code_point <= 0x3ffffff)
4352 Dynarr_add (dst, (code_point >> 24) | 0xf8);
4353 Dynarr_add (dst, ((code_point >> 18) & 0x3f) | 0x80);
4354 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4355 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4356 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4360 Dynarr_add (dst, (code_point >> 30) | 0xfc);
4361 Dynarr_add (dst, ((code_point >> 24) & 0x3f) | 0x80);
4362 Dynarr_add (dst, ((code_point >> 18) & 0x3f) | 0x80);
4363 Dynarr_add (dst, ((code_point >> 12) & 0x3f) | 0x80);
4364 Dynarr_add (dst, ((code_point >> 6) & 0x3f) | 0x80);
4365 Dynarr_add (dst, (code_point & 0x3f) | 0x80);
4371 char_finish_utf8 (struct encoding_stream *str, unsigned_char_dynarr *dst,
4372 unsigned int *flags)
4377 /************************************************************************/
4378 /* ISO2022 methods */
4379 /************************************************************************/
4381 /* The following note describes the coding system ISO2022 briefly.
4382 Since the intention of this note is to help understand the
4383 functions in this file, some parts are NOT ACCURATE or OVERLY
4384 SIMPLIFIED. For thorough understanding, please refer to the
4385 original document of ISO2022.
4387 ISO2022 provides many mechanisms to encode several character sets
4388 in 7-bit and 8-bit environments. For 7-bit environments, all text
4389 is encoded using bytes less than 128. This may make the encoded
4390 text a little bit longer, but the text passes more easily through
4391 several gateways, some of which strip off MSB (Most Signigant Bit).
4393 There are two kinds of character sets: control character set and
4394 graphic character set. The former contains control characters such
4395 as `newline' and `escape' to provide control functions (control
4396 functions are also provided by escape sequences). The latter
4397 contains graphic characters such as 'A' and '-'. Emacs recognizes
4398 two control character sets and many graphic character sets.
4400 Graphic character sets are classified into one of the following
4401 four classes, according to the number of bytes (DIMENSION) and
4402 number of characters in one dimension (CHARS) of the set:
4403 - DIMENSION1_CHARS94
4404 - DIMENSION1_CHARS96
4405 - DIMENSION2_CHARS94
4406 - DIMENSION2_CHARS96
4408 In addition, each character set is assigned an identification tag,
4409 unique for each set, called "final character" (denoted as <F>
4410 hereafter). The <F> of each character set is decided by ECMA(*)
4411 when it is registered in ISO. The code range of <F> is 0x30..0x7F
4412 (0x30..0x3F are for private use only).
4414 Note (*): ECMA = European Computer Manufacturers Association
4416 Here are examples of graphic character set [NAME(<F>)]:
4417 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
4418 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
4419 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
4420 o DIMENSION2_CHARS96 -- none for the moment
4422 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
4423 C0 [0x00..0x1F] -- control character plane 0
4424 GL [0x20..0x7F] -- graphic character plane 0
4425 C1 [0x80..0x9F] -- control character plane 1
4426 GR [0xA0..0xFF] -- graphic character plane 1
4428 A control character set is directly designated and invoked to C0 or
4429 C1 by an escape sequence. The most common case is that:
4430 - ISO646's control character set is designated/invoked to C0, and
4431 - ISO6429's control character set is designated/invoked to C1,
4432 and usually these designations/invocations are omitted in encoded
4433 text. In a 7-bit environment, only C0 can be used, and a control
4434 character for C1 is encoded by an appropriate escape sequence to
4435 fit into the environment. All control characters for C1 are
4436 defined to have corresponding escape sequences.
4438 A graphic character set is at first designated to one of four
4439 graphic registers (G0 through G3), then these graphic registers are
4440 invoked to GL or GR. These designations and invocations can be
4441 done independently. The most common case is that G0 is invoked to
4442 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
4443 these invocations and designations are omitted in encoded text.
4444 In a 7-bit environment, only GL can be used.
4446 When a graphic character set of CHARS94 is invoked to GL, codes
4447 0x20 and 0x7F of the GL area work as control characters SPACE and
4448 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
4451 There are two ways of invocation: locking-shift and single-shift.
4452 With locking-shift, the invocation lasts until the next different
4453 invocation, whereas with single-shift, the invocation affects the
4454 following character only and doesn't affect the locking-shift
4455 state. Invocations are done by the following control characters or
4458 ----------------------------------------------------------------------
4459 abbrev function cntrl escape seq description
4460 ----------------------------------------------------------------------
4461 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
4462 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
4463 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
4464 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
4465 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
4466 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
4467 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
4468 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
4469 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
4470 ----------------------------------------------------------------------
4471 (*) These are not used by any known coding system.
4473 Control characters for these functions are defined by macros
4474 ISO_CODE_XXX in `coding.h'.
4476 Designations are done by the following escape sequences:
4477 ----------------------------------------------------------------------
4478 escape sequence description
4479 ----------------------------------------------------------------------
4480 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
4481 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
4482 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
4483 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
4484 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
4485 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
4486 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
4487 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
4488 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
4489 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
4490 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
4491 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
4492 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
4493 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
4494 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
4495 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
4496 ----------------------------------------------------------------------
4498 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
4499 of dimension 1, chars 94, and final character <F>, etc...
4501 Note (*): Although these designations are not allowed in ISO2022,
4502 Emacs accepts them on decoding, and produces them on encoding
4503 CHARS96 character sets in a coding system which is characterized as
4504 7-bit environment, non-locking-shift, and non-single-shift.
4506 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
4507 '(' can be omitted. We refer to this as "short-form" hereafter.
4509 Now you may notice that there are a lot of ways for encoding the
4510 same multilingual text in ISO2022. Actually, there exist many
4511 coding systems such as Compound Text (used in X11's inter client
4512 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
4513 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
4514 localized platforms), and all of these are variants of ISO2022.
4516 In addition to the above, Emacs handles two more kinds of escape
4517 sequences: ISO6429's direction specification and Emacs' private
4518 sequence for specifying character composition.
4520 ISO6429's direction specification takes the following form:
4521 o CSI ']' -- end of the current direction
4522 o CSI '0' ']' -- end of the current direction
4523 o CSI '1' ']' -- start of left-to-right text
4524 o CSI '2' ']' -- start of right-to-left text
4525 The control character CSI (0x9B: control sequence introducer) is
4526 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
4528 Character composition specification takes the following form:
4529 o ESC '0' -- start character composition
4530 o ESC '1' -- end character composition
4531 Since these are not standard escape sequences of any ISO standard,
4532 their use with these meanings is restricted to Emacs only. */
4535 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
4539 for (i = 0; i < 4; i++)
4541 if (!NILP (coding_system))
4543 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
4545 iso->charset[i] = Qt;
4546 iso->invalid_designated[i] = 0;
4548 iso->esc = ISO_ESC_NOTHING;
4549 iso->esc_bytes_index = 0;
4550 iso->register_left = 0;
4551 iso->register_right = 1;
4552 iso->switched_dir_and_no_valid_charset_yet = 0;
4553 iso->invalid_switch_dir = 0;
4554 iso->output_direction_sequence = 0;
4555 iso->output_literally = 0;
4556 #ifdef ENABLE_COMPOSITE_CHARS
4557 if (iso->composite_chars)
4558 Dynarr_reset (iso->composite_chars);
4563 fit_to_be_escape_quoted (unsigned char c)
4580 /* Parse one byte of an ISO2022 escape sequence.
4581 If the result is an invalid escape sequence, return 0 and
4582 do not change anything in STR. Otherwise, if the result is
4583 an incomplete escape sequence, update ISO2022.ESC and
4584 ISO2022.ESC_BYTES and return -1. Otherwise, update
4585 all the state variables (but not ISO2022.ESC_BYTES) and
4588 If CHECK_INVALID_CHARSETS is non-zero, check for designation
4589 or invocation of an invalid character set and treat that as
4590 an unrecognized escape sequence. */
4593 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
4594 unsigned char c, unsigned int *flags,
4595 int check_invalid_charsets)
4597 /* (1) If we're at the end of a designation sequence, CS is the
4598 charset being designated and REG is the register to designate
4601 (2) If we're at the end of a locking-shift sequence, REG is
4602 the register to invoke and HALF (0 == left, 1 == right) is
4603 the half to invoke it into.
4605 (3) If we're at the end of a single-shift sequence, REG is
4606 the register to invoke. */
4607 Lisp_Object cs = Qnil;
4610 /* NOTE: This code does goto's all over the fucking place.
4611 The reason for this is that we're basically implementing
4612 a state machine here, and hierarchical languages like C
4613 don't really provide a clean way of doing this. */
4615 if (! (*flags & CODING_STATE_ESCAPE))
4616 /* At beginning of escape sequence; we need to reset our
4617 escape-state variables. */
4618 iso->esc = ISO_ESC_NOTHING;
4620 iso->output_literally = 0;
4621 iso->output_direction_sequence = 0;
4625 case ISO_ESC_NOTHING:
4626 iso->esc_bytes_index = 0;
4629 case ISO_CODE_ESC: /* Start escape sequence */
4630 *flags |= CODING_STATE_ESCAPE;
4634 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
4635 *flags |= CODING_STATE_ESCAPE;
4636 iso->esc = ISO_ESC_5_11;
4639 case ISO_CODE_SO: /* locking shift 1 */
4642 case ISO_CODE_SI: /* locking shift 0 */
4646 case ISO_CODE_SS2: /* single shift */
4649 case ISO_CODE_SS3: /* single shift */
4653 default: /* Other control characters */
4660 /**** single shift ****/
4662 case 'N': /* single shift 2 */
4665 case 'O': /* single shift 3 */
4669 /**** locking shift ****/
4671 case '~': /* locking shift 1 right */
4674 case 'n': /* locking shift 2 */
4677 case '}': /* locking shift 2 right */
4680 case 'o': /* locking shift 3 */
4683 case '|': /* locking shift 3 right */
4687 #ifdef ENABLE_COMPOSITE_CHARS
4688 /**** composite ****/
4691 iso->esc = ISO_ESC_START_COMPOSITE;
4692 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
4693 CODING_STATE_COMPOSITE;
4697 iso->esc = ISO_ESC_END_COMPOSITE;
4698 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
4699 ~CODING_STATE_COMPOSITE;
4701 #endif /* ENABLE_COMPOSITE_CHARS */
4703 /**** directionality ****/
4706 iso->esc = ISO_ESC_5_11;
4709 /**** designation ****/
4711 case '$': /* multibyte charset prefix */
4712 iso->esc = ISO_ESC_2_4;
4716 if (0x28 <= c && c <= 0x2F)
4718 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
4722 /* This function is called with CODESYS equal to nil when
4723 doing coding-system detection. */
4725 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
4726 && fit_to_be_escape_quoted (c))
4728 iso->esc = ISO_ESC_LITERAL;
4729 *flags &= CODING_STATE_ISO2022_LOCK;
4739 /**** directionality ****/
4741 case ISO_ESC_5_11: /* ISO6429 direction control */
4744 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4745 goto directionality;
4747 if (c == '0') iso->esc = ISO_ESC_5_11_0;
4748 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
4749 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
4753 case ISO_ESC_5_11_0:
4756 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4757 goto directionality;
4761 case ISO_ESC_5_11_1:
4764 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
4765 goto directionality;
4769 case ISO_ESC_5_11_2:
4772 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
4773 goto directionality;
4778 iso->esc = ISO_ESC_DIRECTIONALITY;
4779 /* Various junk here to attempt to preserve the direction sequences
4780 literally in the text if they would otherwise be swallowed due
4781 to invalid designations that don't show up as actual charset
4782 changes in the text. */
4783 if (iso->invalid_switch_dir)
4785 /* We already inserted a direction switch literally into the
4786 text. We assume (#### this may not be right) that the
4787 next direction switch is the one going the other way,
4788 and we need to output that literally as well. */
4789 iso->output_literally = 1;
4790 iso->invalid_switch_dir = 0;
4796 /* If we are in the thrall of an invalid designation,
4797 then stick the directionality sequence literally into the
4798 output stream so it ends up in the original text again. */
4799 for (jj = 0; jj < 4; jj++)
4800 if (iso->invalid_designated[jj])
4804 iso->output_literally = 1;
4805 iso->invalid_switch_dir = 1;
4808 /* Indicate that we haven't yet seen a valid designation,
4809 so that if a switch-dir is directly followed by an
4810 invalid designation, both get inserted literally. */
4811 iso->switched_dir_and_no_valid_charset_yet = 1;
4816 /**** designation ****/
4819 if (0x28 <= c && c <= 0x2F)
4821 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
4824 if (0x40 <= c && c <= 0x42)
4827 cs = CHARSET_BY_ATTRIBUTES (94, -1, c,
4828 *flags & CODING_STATE_R2L ?
4829 CHARSET_RIGHT_TO_LEFT :
4830 CHARSET_LEFT_TO_RIGHT);
4841 if (c < '0' || c > '~')
4842 return 0; /* bad final byte */
4844 if (iso->esc >= ISO_ESC_2_8 &&
4845 iso->esc <= ISO_ESC_2_15)
4847 chars = (iso->esc >= ISO_ESC_2_12) ? 96 : 94;
4848 single = 1; /* single-byte */
4849 reg = (iso->esc - ISO_ESC_2_8) & 3;
4851 else if (iso->esc >= ISO_ESC_2_4_8 &&
4852 iso->esc <= ISO_ESC_2_4_15)
4854 chars = (iso->esc >= ISO_ESC_2_4_12) ? 96 : 94;
4855 single = -1; /* multi-byte */
4856 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
4860 /* Can this ever be reached? -slb */
4864 cs = CHARSET_BY_ATTRIBUTES (chars, single, c,
4865 *flags & CODING_STATE_R2L ?
4866 CHARSET_RIGHT_TO_LEFT :
4867 CHARSET_LEFT_TO_RIGHT);
4873 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
4877 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
4878 /* can't invoke something that ain't there. */
4880 iso->esc = ISO_ESC_SINGLE_SHIFT;
4881 *flags &= CODING_STATE_ISO2022_LOCK;
4883 *flags |= CODING_STATE_SS2;
4885 *flags |= CODING_STATE_SS3;
4889 if (check_invalid_charsets &&
4890 !CHARSETP (iso->charset[reg]))
4891 /* can't invoke something that ain't there. */
4894 iso->register_right = reg;
4896 iso->register_left = reg;
4897 *flags &= CODING_STATE_ISO2022_LOCK;
4898 iso->esc = ISO_ESC_LOCKING_SHIFT;
4902 if (NILP (cs) && check_invalid_charsets)
4904 iso->invalid_designated[reg] = 1;
4905 iso->charset[reg] = Vcharset_ascii;
4906 iso->esc = ISO_ESC_DESIGNATE;
4907 *flags &= CODING_STATE_ISO2022_LOCK;
4908 iso->output_literally = 1;
4909 if (iso->switched_dir_and_no_valid_charset_yet)
4911 /* We encountered a switch-direction followed by an
4912 invalid designation. Ensure that the switch-direction
4913 gets outputted; otherwise it will probably get eaten
4914 when the text is written out again. */
4915 iso->switched_dir_and_no_valid_charset_yet = 0;
4916 iso->output_direction_sequence = 1;
4917 /* And make sure that the switch-dir going the other
4918 way gets outputted, as well. */
4919 iso->invalid_switch_dir = 1;
4923 /* This function is called with CODESYS equal to nil when
4924 doing coding-system detection. */
4925 if (!NILP (codesys))
4927 charset_conversion_spec_dynarr *dyn =
4928 XCODING_SYSTEM (codesys)->iso2022.input_conv;
4934 for (i = 0; i < Dynarr_length (dyn); i++)
4936 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
4937 if (EQ (cs, spec->from_charset))
4938 cs = spec->to_charset;
4943 iso->charset[reg] = cs;
4944 iso->esc = ISO_ESC_DESIGNATE;
4945 *flags &= CODING_STATE_ISO2022_LOCK;
4946 if (iso->invalid_designated[reg])
4948 iso->invalid_designated[reg] = 0;
4949 iso->output_literally = 1;
4951 if (iso->switched_dir_and_no_valid_charset_yet)
4952 iso->switched_dir_and_no_valid_charset_yet = 0;
4957 detect_coding_iso2022 (struct detection_state *st, const Extbyte *src, size_t n)
4961 /* #### There are serious deficiencies in the recognition mechanism
4962 here. This needs to be much smarter if it's going to cut it.
4963 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
4964 it should be detected as Latin-1.
4965 All the ISO2022 stuff in this file should be synced up with the
4966 code from FSF Emacs-20.4, in which Mule should be more or less stable.
4967 Perhaps we should wait till R2L works in FSF Emacs? */
4969 if (!st->iso2022.initted)
4971 reset_iso2022 (Qnil, &st->iso2022.iso);
4972 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
4973 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
4974 CODING_CATEGORY_ISO_8_1_MASK |
4975 CODING_CATEGORY_ISO_8_2_MASK |
4976 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
4977 st->iso2022.flags = 0;
4978 st->iso2022.high_byte_count = 0;
4979 st->iso2022.saw_single_shift = 0;
4980 st->iso2022.initted = 1;
4983 mask = st->iso2022.mask;
4987 unsigned char c = *(unsigned char *)src++;
4990 mask &= ~CODING_CATEGORY_ISO_7_MASK;
4991 st->iso2022.high_byte_count++;
4995 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
4997 if (st->iso2022.high_byte_count & 1)
4998 /* odd number of high bytes; assume not iso-8-2 */
4999 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
5001 st->iso2022.high_byte_count = 0;
5002 st->iso2022.saw_single_shift = 0;
5004 mask &= ~CODING_CATEGORY_ISO_7_MASK;
5006 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
5007 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
5008 { /* control chars */
5011 /* Allow and ignore control characters that you might
5012 reasonably see in a text file */
5017 case 8: /* backspace */
5018 case 11: /* vertical tab */
5019 case 12: /* form feed */
5020 case 26: /* MS-DOS C-z junk */
5021 case 31: /* '^_' -- for info */
5022 goto label_continue_loop;
5029 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
5032 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
5033 &st->iso2022.flags, 0))
5035 switch (st->iso2022.iso.esc)
5037 case ISO_ESC_DESIGNATE:
5038 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
5039 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
5041 case ISO_ESC_LOCKING_SHIFT:
5042 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
5043 goto ran_out_of_chars;
5044 case ISO_ESC_SINGLE_SHIFT:
5045 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
5046 st->iso2022.saw_single_shift = 1;
5055 goto ran_out_of_chars;
5058 label_continue_loop:;
5067 postprocess_iso2022_mask (int mask)
5069 /* #### kind of cheesy */
5070 /* If seven-bit ISO is allowed, then assume that the encoding is
5071 entirely seven-bit and turn off the eight-bit ones. */
5072 if (mask & CODING_CATEGORY_ISO_7_MASK)
5073 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
5074 CODING_CATEGORY_ISO_8_1_MASK |
5075 CODING_CATEGORY_ISO_8_2_MASK);
5079 /* If FLAGS is a null pointer or specifies right-to-left motion,
5080 output a switch-dir-to-left-to-right sequence to DST.
5081 Also update FLAGS if it is not a null pointer.
5082 If INTERNAL_P is set, we are outputting in internal format and
5083 need to handle the CSI differently. */
5086 restore_left_to_right_direction (Lisp_Coding_System *codesys,
5087 unsigned_char_dynarr *dst,
5088 unsigned int *flags,
5091 if (!flags || (*flags & CODING_STATE_R2L))
5093 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5095 Dynarr_add (dst, ISO_CODE_ESC);
5096 Dynarr_add (dst, '[');
5098 else if (internal_p)
5099 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
5101 Dynarr_add (dst, ISO_CODE_CSI);
5102 Dynarr_add (dst, '0');
5103 Dynarr_add (dst, ']');
5105 *flags &= ~CODING_STATE_R2L;
5109 /* If FLAGS is a null pointer or specifies a direction different from
5110 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
5111 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
5112 sequence to DST. Also update FLAGS if it is not a null pointer.
5113 If INTERNAL_P is set, we are outputting in internal format and
5114 need to handle the CSI differently. */
5117 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
5118 unsigned_char_dynarr *dst, unsigned int *flags,
5121 if ((!flags || (*flags & CODING_STATE_R2L)) &&
5122 direction == CHARSET_LEFT_TO_RIGHT)
5123 restore_left_to_right_direction (codesys, dst, flags, internal_p);
5124 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
5125 && (!flags || !(*flags & CODING_STATE_R2L)) &&
5126 direction == CHARSET_RIGHT_TO_LEFT)
5128 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5130 Dynarr_add (dst, ISO_CODE_ESC);
5131 Dynarr_add (dst, '[');
5133 else if (internal_p)
5134 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
5136 Dynarr_add (dst, ISO_CODE_CSI);
5137 Dynarr_add (dst, '2');
5138 Dynarr_add (dst, ']');
5140 *flags |= CODING_STATE_R2L;
5144 /* Convert ISO2022-format data to internal format. */
5147 decode_coding_iso2022 (Lstream *decoding, const Extbyte *src,
5148 unsigned_char_dynarr *dst, size_t n)
5150 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
5151 unsigned int flags = str->flags;
5152 unsigned int cpos = str->cpos;
5153 unsigned char counter = str->counter;
5154 eol_type_t eol_type = str->eol_type;
5155 #ifdef ENABLE_COMPOSITE_CHARS
5156 unsigned_char_dynarr *real_dst = dst;
5158 Lisp_Object coding_system;
5160 XSETCODING_SYSTEM (coding_system, str->codesys);
5162 #ifdef ENABLE_COMPOSITE_CHARS
5163 if (flags & CODING_STATE_COMPOSITE)
5164 dst = str->iso2022.composite_chars;
5165 #endif /* ENABLE_COMPOSITE_CHARS */
5169 unsigned char c = *(unsigned char *)src++;
5170 if (flags & CODING_STATE_ESCAPE)
5171 { /* Within ESC sequence */
5172 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
5177 switch (str->iso2022.esc)
5179 #ifdef ENABLE_COMPOSITE_CHARS
5180 case ISO_ESC_START_COMPOSITE:
5181 if (str->iso2022.composite_chars)
5182 Dynarr_reset (str->iso2022.composite_chars);
5184 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
5185 dst = str->iso2022.composite_chars;
5187 case ISO_ESC_END_COMPOSITE:
5189 Bufbyte comstr[MAX_EMCHAR_LEN];
5191 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
5192 Dynarr_length (dst));
5194 len = set_charptr_emchar (comstr, emch);
5195 Dynarr_add_many (dst, comstr, len);
5198 #endif /* ENABLE_COMPOSITE_CHARS */
5200 case ISO_ESC_LITERAL:
5201 COMPOSE_FLUSH_CHARS (str, dst);
5202 DECODE_ADD_BINARY_CHAR (c, dst);
5206 /* Everything else handled already */
5211 /* Attempted error recovery. */
5212 if (str->iso2022.output_direction_sequence)
5213 ensure_correct_direction (flags & CODING_STATE_R2L ?
5214 CHARSET_RIGHT_TO_LEFT :
5215 CHARSET_LEFT_TO_RIGHT,
5216 str->codesys, dst, 0, 1);
5217 /* More error recovery. */
5218 if (!retval || str->iso2022.output_literally)
5220 /* Output the (possibly invalid) sequence */
5222 COMPOSE_FLUSH_CHARS (str, dst);
5223 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
5224 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
5225 flags &= CODING_STATE_ISO2022_LOCK;
5227 n++, src--;/* Repeat the loop with the same character. */
5230 /* No sense in reprocessing the final byte of the
5231 escape sequence; it could mess things up anyway.
5233 COMPOSE_FLUSH_CHARS (str, dst);
5234 DECODE_ADD_BINARY_CHAR (c, dst);
5240 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
5241 { /* Control characters */
5243 /***** Error-handling *****/
5245 /* If we were in the middle of a character, dump out the
5246 partial character. */
5249 COMPOSE_FLUSH_CHARS (str, dst);
5253 DECODE_ADD_BINARY_CHAR
5254 ((unsigned char)(cpos >> (counter * 8)), dst);
5259 /* If we just saw a single-shift character, dump it out.
5260 This may dump out the wrong sort of single-shift character,
5261 but least it will give an indication that something went
5263 if (flags & CODING_STATE_SS2)
5265 COMPOSE_FLUSH_CHARS (str, dst);
5266 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
5267 flags &= ~CODING_STATE_SS2;
5269 if (flags & CODING_STATE_SS3)
5271 COMPOSE_FLUSH_CHARS (str, dst);
5272 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
5273 flags &= ~CODING_STATE_SS3;
5276 /***** Now handle the control characters. *****/
5282 COMPOSE_FLUSH_CHARS (str, dst);
5283 if (eol_type == EOL_CR)
5284 Dynarr_add (dst, '\n');
5285 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR)
5286 Dynarr_add (dst, c);
5288 flags |= CODING_STATE_CR;
5289 goto label_continue_loop;
5291 else if (flags & CODING_STATE_CR)
5292 { /* eol_type == CODING_SYSTEM_EOL_CRLF */
5294 Dynarr_add (dst, '\r');
5295 flags &= ~CODING_STATE_CR;
5298 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5301 flags &= CODING_STATE_ISO2022_LOCK;
5303 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
5305 COMPOSE_FLUSH_CHARS (str, dst);
5306 DECODE_ADD_BINARY_CHAR (c, dst);
5310 { /* Graphic characters */
5311 Lisp_Object charset;
5320 COMPOSE_FLUSH_CHARS (str, dst);
5321 if (eol_type == EOL_CR)
5322 Dynarr_add (dst, '\n');
5323 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR)
5324 Dynarr_add (dst, c);
5326 flags |= CODING_STATE_CR;
5327 goto label_continue_loop;
5329 else if (flags & CODING_STATE_CR)
5330 { /* eol_type == CODING_SYSTEM_EOL_CRLF */
5332 Dynarr_add (dst, '\r');
5333 flags &= ~CODING_STATE_CR;
5336 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5339 /* Now determine the charset. */
5340 reg = ((flags & CODING_STATE_SS2) ? 2
5341 : (flags & CODING_STATE_SS3) ? 3
5342 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
5343 : str->iso2022.register_left);
5344 charset = str->iso2022.charset[reg];
5346 /* Error checking: */
5347 if (! CHARSETP (charset)
5348 || str->iso2022.invalid_designated[reg]
5349 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
5350 && XCHARSET_CHARS (charset) == 94))
5351 /* Mrmph. We are trying to invoke a register that has no
5352 or an invalid charset in it, or trying to add a character
5353 outside the range of the charset. Insert that char literally
5354 to preserve it for the output. */
5356 COMPOSE_FLUSH_CHARS (str, dst);
5360 DECODE_ADD_BINARY_CHAR
5361 ((unsigned char)(cpos >> (counter * 8)), dst);
5364 DECODE_ADD_BINARY_CHAR (c, dst);
5369 /* Things are probably hunky-dorey. */
5371 /* Fetch reverse charset, maybe. */
5372 if (((flags & CODING_STATE_R2L) &&
5373 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
5375 (!(flags & CODING_STATE_R2L) &&
5376 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
5378 Lisp_Object new_charset =
5379 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
5380 if (!NILP (new_charset))
5381 charset = new_charset;
5386 if (XCHARSET_DIMENSION (charset) == counter)
5388 COMPOSE_ADD_CHAR (str,
5389 DECODE_CHAR (charset,
5390 ((cpos & 0x7F7F7F) << 8)
5397 cpos = (cpos << 8) | c;
5399 lb = XCHARSET_LEADING_BYTE (charset);
5400 switch (XCHARSET_REP_BYTES (charset))
5403 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5404 Dynarr_add (dst, c & 0x7F);
5407 case 2: /* one-byte official */
5408 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5409 Dynarr_add (dst, lb);
5410 Dynarr_add (dst, c | 0x80);
5413 case 3: /* one-byte private or two-byte official */
5414 if (XCHARSET_PRIVATE_P (charset))
5416 DECODE_OUTPUT_PARTIAL_CHAR (ch);
5417 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
5418 Dynarr_add (dst, lb);
5419 Dynarr_add (dst, c | 0x80);
5425 Dynarr_add (dst, lb);
5426 Dynarr_add (dst, ch | 0x80);
5427 Dynarr_add (dst, c | 0x80);
5435 default: /* two-byte private */
5438 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
5439 Dynarr_add (dst, lb);
5440 Dynarr_add (dst, ch | 0x80);
5441 Dynarr_add (dst, c | 0x80);
5451 flags &= CODING_STATE_ISO2022_LOCK;
5454 label_continue_loop:;
5457 if (flags & CODING_STATE_END)
5459 COMPOSE_FLUSH_CHARS (str, dst);
5460 DECODE_OUTPUT_PARTIAL_CHAR (cpos);
5464 str->counter = counter;
5468 /***** ISO2022 encoder *****/
5470 /* Designate CHARSET into register REG. */
5473 iso2022_designate (Lisp_Object charset, unsigned char reg,
5474 struct encoding_stream *str, unsigned_char_dynarr *dst)
5476 static const char inter94[] = "()*+";
5477 static const char inter96[] = ",-./";
5478 unsigned short chars;
5479 unsigned char dimension;
5480 unsigned char final;
5481 Lisp_Object old_charset = str->iso2022.charset[reg];
5483 str->iso2022.charset[reg] = charset;
5484 if (!CHARSETP (charset))
5485 /* charset might be an initial nil or t. */
5487 chars = XCHARSET_CHARS (charset);
5488 dimension = XCHARSET_DIMENSION (charset);
5489 final = XCHARSET_FINAL (charset);
5490 if (!str->iso2022.force_charset_on_output[reg] &&
5491 CHARSETP (old_charset) &&
5492 XCHARSET_CHARS (old_charset) == chars &&
5493 XCHARSET_DIMENSION (old_charset) == dimension &&
5494 XCHARSET_FINAL (old_charset) == final)
5497 str->iso2022.force_charset_on_output[reg] = 0;
5500 charset_conversion_spec_dynarr *dyn =
5501 str->codesys->iso2022.output_conv;
5507 for (i = 0; i < Dynarr_length (dyn); i++)
5509 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
5510 if (EQ (charset, spec->from_charset))
5511 charset = spec->to_charset;
5516 Dynarr_add (dst, ISO_CODE_ESC);
5521 Dynarr_add (dst, inter94[reg]);
5524 Dynarr_add (dst, '$');
5526 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
5529 Dynarr_add (dst, inter94[reg]);
5534 Dynarr_add (dst, inter96[reg]);
5537 Dynarr_add (dst, '$');
5538 Dynarr_add (dst, inter96[reg]);
5542 Dynarr_add (dst, final);
5546 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
5548 if (str->iso2022.register_left != 0)
5550 Dynarr_add (dst, ISO_CODE_SI);
5551 str->iso2022.register_left = 0;
5556 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
5558 if (str->iso2022.register_left != 1)
5560 Dynarr_add (dst, ISO_CODE_SO);
5561 str->iso2022.register_left = 1;
5566 char_encode_iso2022 (struct encoding_stream *str, Emchar ch,
5567 unsigned_char_dynarr *dst, unsigned int *flags)
5569 unsigned char charmask;
5570 Lisp_Coding_System* codesys = str->codesys;
5571 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
5573 Lisp_Object charset = str->iso2022.current_charset;
5574 int half = str->iso2022.current_half;
5575 int code_point = -1;
5579 restore_left_to_right_direction (codesys, dst, flags, 0);
5581 /* Make sure G0 contains ASCII */
5582 if ((ch > ' ' && ch < ISO_CODE_DEL)
5583 || !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
5585 ensure_normal_shift (str, dst);
5586 iso2022_designate (Vcharset_ascii, 0, str, dst);
5589 /* If necessary, restore everything to the default state
5591 if (ch == '\n' && !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
5593 restore_left_to_right_direction (codesys, dst, flags, 0);
5595 ensure_normal_shift (str, dst);
5597 for (i = 0; i < 4; i++)
5599 Lisp_Object initial_charset =
5600 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
5601 iso2022_designate (initial_charset, i, str, dst);
5606 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5607 Dynarr_add (dst, '\r');
5608 if (eol_type != EOL_CR)
5609 Dynarr_add (dst, ch);
5613 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
5614 && fit_to_be_escape_quoted (ch))
5615 Dynarr_add (dst, ISO_CODE_ESC);
5616 Dynarr_add (dst, ch);
5619 else if ( (0x80 <= ch) && (ch <= 0x9f) )
5621 charmask = (half == 0 ? 0x00 : 0x80);
5623 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
5624 && fit_to_be_escape_quoted (ch))
5625 Dynarr_add (dst, ISO_CODE_ESC);
5626 /* you asked for it ... */
5627 Dynarr_add (dst, ch);
5633 /* Now determine which register to use. */
5635 for (i = 0; i < 4; i++)
5637 if ((CHARSETP (charset = str->iso2022.charset[i])
5638 && ((code_point = charset_code_point (charset, ch)) >= 0))
5642 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i))
5643 && ((code_point = charset_code_point (charset, ch)) >= 0)))
5651 Lisp_Object original_default_coded_charset_priority_list
5652 = Vdefault_coded_charset_priority_list;
5654 while (!EQ (Vdefault_coded_charset_priority_list, Qnil))
5656 code_point = ENCODE_CHAR (ch, charset);
5657 if (XCHARSET_FINAL (charset))
5659 Vdefault_coded_charset_priority_list
5660 = Fcdr (Fmemq (XCHARSET_NAME (charset),
5661 Vdefault_coded_charset_priority_list));
5663 code_point = ENCODE_CHAR (ch, charset);
5664 if (!XCHARSET_FINAL (charset))
5666 charset = Vcharset_ascii;
5670 Vdefault_coded_charset_priority_list
5671 = original_default_coded_charset_priority_list;
5673 ensure_correct_direction (XCHARSET_DIRECTION (charset),
5674 codesys, dst, flags, 0);
5678 if (XCHARSET_GRAPHIC (charset) != 0)
5680 if (!NILP (str->iso2022.charset[1]) &&
5681 (!CODING_SYSTEM_ISO2022_SEVEN (codesys)
5682 || CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
5684 else if (!NILP (str->iso2022.charset[2]))
5686 else if (!NILP (str->iso2022.charset[3]))
5695 iso2022_designate (charset, reg, str, dst);
5697 /* Now invoke that register. */
5701 ensure_normal_shift (str, dst);
5705 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
5707 ensure_shift_out (str, dst);
5714 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
5716 Dynarr_add (dst, ISO_CODE_ESC);
5717 Dynarr_add (dst, 'N');
5722 Dynarr_add (dst, ISO_CODE_SS2);
5727 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
5729 Dynarr_add (dst, ISO_CODE_ESC);
5730 Dynarr_add (dst, 'O');
5735 Dynarr_add (dst, ISO_CODE_SS3);
5743 charmask = (half == 0 ? 0x00 : 0x80);
5745 switch (XCHARSET_DIMENSION (charset))
5748 Dynarr_add (dst, (code_point & 0xFF) | charmask);
5751 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5752 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5755 Dynarr_add (dst, ((code_point >> 16) & 0xFF) | charmask);
5756 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5757 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5760 Dynarr_add (dst, ((code_point >> 24) & 0xFF) | charmask);
5761 Dynarr_add (dst, ((code_point >> 16) & 0xFF) | charmask);
5762 Dynarr_add (dst, ((code_point >> 8) & 0xFF) | charmask);
5763 Dynarr_add (dst, ( code_point & 0xFF) | charmask);
5769 str->iso2022.current_charset = charset;
5770 str->iso2022.current_half = half;
5774 char_finish_iso2022 (struct encoding_stream *str, unsigned_char_dynarr *dst,
5775 unsigned int *flags)
5777 Lisp_Coding_System* codesys = str->codesys;
5780 restore_left_to_right_direction (codesys, dst, flags, 0);
5781 ensure_normal_shift (str, dst);
5782 for (i = 0; i < 4; i++)
5784 Lisp_Object initial_charset
5785 = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
5786 iso2022_designate (initial_charset, i, str, dst);
5791 /************************************************************************/
5792 /* No-conversion methods */
5793 /************************************************************************/
5795 /* This is used when reading in "binary" files -- i.e. files that may
5796 contain all 256 possible byte values and that are not to be
5797 interpreted as being in any particular decoding. */
5799 decode_coding_no_conversion (Lstream *decoding, const Extbyte *src,
5800 unsigned_char_dynarr *dst, size_t n)
5802 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
5803 unsigned int flags = str->flags;
5804 unsigned int cpos = str->cpos;
5805 eol_type_t eol_type = str->eol_type;
5809 unsigned char c = *(unsigned char *)src++;
5811 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
5812 DECODE_ADD_BINARY_CHAR (c, dst);
5813 label_continue_loop:;
5816 DECODE_HANDLE_END_OF_CONVERSION (flags, cpos, dst);
5823 encode_coding_no_conversion (Lstream *encoding, const Bufbyte *src,
5824 unsigned_char_dynarr *dst, size_t n)
5827 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
5828 unsigned int flags = str->flags;
5829 unsigned int ch = str->ch;
5830 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
5832 unsigned char char_boundary = str->iso2022.current_char_boundary;
5839 if (char_boundary == 0)
5845 else if ( c >= 0xf8 )
5850 else if ( c >= 0xf0 )
5855 else if ( c >= 0xe0 )
5860 else if ( c >= 0xc0 )
5870 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5871 Dynarr_add (dst, '\r');
5872 if (eol_type != EOL_CR)
5873 Dynarr_add (dst, c);
5876 Dynarr_add (dst, c);
5879 else if (char_boundary == 1)
5881 ch = ( ch << 6 ) | ( c & 0x3f );
5882 Dynarr_add (dst, ch & 0xff);
5887 ch = ( ch << 6 ) | ( c & 0x3f );
5890 #else /* not UTF2000 */
5893 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
5894 Dynarr_add (dst, '\r');
5895 if (eol_type != EOL_CR)
5896 Dynarr_add (dst, '\n');
5899 else if (BYTE_ASCII_P (c))
5902 Dynarr_add (dst, c);
5904 else if (BUFBYTE_LEADING_BYTE_P (c))
5907 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
5908 c == LEADING_BYTE_CONTROL_1)
5911 Dynarr_add (dst, '~'); /* untranslatable character */
5915 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
5916 Dynarr_add (dst, c);
5917 else if (ch == LEADING_BYTE_CONTROL_1)
5920 Dynarr_add (dst, c - 0x20);
5922 /* else it should be the second or third byte of an
5923 untranslatable character, so ignore it */
5926 #endif /* not UTF2000 */
5932 str->iso2022.current_char_boundary = char_boundary;
5938 /************************************************************************/
5939 /* Initialization */
5940 /************************************************************************/
5943 syms_of_file_coding (void)
5945 INIT_LRECORD_IMPLEMENTATION (coding_system);
5947 deferror (&Qcoding_system_error, "coding-system-error",
5948 "Coding-system error", Qio_error);
5950 DEFSUBR (Fcoding_system_p);
5951 DEFSUBR (Ffind_coding_system);
5952 DEFSUBR (Fget_coding_system);
5953 DEFSUBR (Fcoding_system_list);
5954 DEFSUBR (Fcoding_system_name);
5955 DEFSUBR (Fmake_coding_system);
5956 DEFSUBR (Fcopy_coding_system);
5957 DEFSUBR (Fcoding_system_canonical_name_p);
5958 DEFSUBR (Fcoding_system_alias_p);
5959 DEFSUBR (Fcoding_system_aliasee);
5960 DEFSUBR (Fdefine_coding_system_alias);
5961 DEFSUBR (Fsubsidiary_coding_system);
5963 DEFSUBR (Fcoding_system_type);
5964 DEFSUBR (Fcoding_system_doc_string);
5966 DEFSUBR (Fcoding_system_charset);
5968 DEFSUBR (Fcoding_system_property);
5970 DEFSUBR (Fcoding_category_list);
5971 DEFSUBR (Fset_coding_priority_list);
5972 DEFSUBR (Fcoding_priority_list);
5973 DEFSUBR (Fset_coding_category_system);
5974 DEFSUBR (Fcoding_category_system);
5976 DEFSUBR (Fdetect_coding_region);
5977 DEFSUBR (Fdecode_coding_region);
5978 DEFSUBR (Fencode_coding_region);
5980 DEFSUBR (Fdecode_shift_jis_char);
5981 DEFSUBR (Fencode_shift_jis_char);
5982 DEFSUBR (Fdecode_big5_char);
5983 DEFSUBR (Fencode_big5_char);
5985 defsymbol (&Qcoding_systemp, "coding-system-p");
5986 defsymbol (&Qno_conversion, "no-conversion");
5987 defsymbol (&Qraw_text, "raw-text");
5989 defsymbol (&Qbig5, "big5");
5990 defsymbol (&Qshift_jis, "shift-jis");
5991 defsymbol (&Qucs4, "ucs-4");
5992 defsymbol (&Qutf8, "utf-8");
5993 defsymbol (&Qccl, "ccl");
5994 defsymbol (&Qiso2022, "iso2022");
5996 defsymbol (&Qmnemonic, "mnemonic");
5997 defsymbol (&Qeol_type, "eol-type");
5998 defsymbol (&Qpost_read_conversion, "post-read-conversion");
5999 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
6001 defsymbol (&Qcr, "cr");
6002 defsymbol (&Qlf, "lf");
6003 defsymbol (&Qcrlf, "crlf");
6004 defsymbol (&Qeol_cr, "eol-cr");
6005 defsymbol (&Qeol_lf, "eol-lf");
6006 defsymbol (&Qeol_crlf, "eol-crlf");
6008 defsymbol (&Qcharset_g0, "charset-g0");
6009 defsymbol (&Qcharset_g1, "charset-g1");
6010 defsymbol (&Qcharset_g2, "charset-g2");
6011 defsymbol (&Qcharset_g3, "charset-g3");
6012 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
6013 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
6014 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
6015 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
6016 defsymbol (&Qno_iso6429, "no-iso6429");
6017 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
6018 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
6020 defsymbol (&Qshort, "short");
6021 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
6022 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
6023 defsymbol (&Qseven, "seven");
6024 defsymbol (&Qlock_shift, "lock-shift");
6025 defsymbol (&Qescape_quoted, "escape-quoted");
6028 defsymbol (&Qdisable_composition, "disable-composition");
6029 defsymbol (&Quse_entity_reference, "use-entity-reference");
6030 defsymbol (&Qd, "d");
6031 defsymbol (&Qx, "x");
6032 defsymbol (&QX, "X");
6034 defsymbol (&Qencode, "encode");
6035 defsymbol (&Qdecode, "decode");
6038 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
6040 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
6042 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
6044 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
6046 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
6048 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
6050 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
6052 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
6054 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
6057 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
6062 lstream_type_create_file_coding (void)
6064 LSTREAM_HAS_METHOD (decoding, reader);
6065 LSTREAM_HAS_METHOD (decoding, writer);
6066 LSTREAM_HAS_METHOD (decoding, rewinder);
6067 LSTREAM_HAS_METHOD (decoding, seekable_p);
6068 LSTREAM_HAS_METHOD (decoding, flusher);
6069 LSTREAM_HAS_METHOD (decoding, closer);
6070 LSTREAM_HAS_METHOD (decoding, marker);
6072 LSTREAM_HAS_METHOD (encoding, reader);
6073 LSTREAM_HAS_METHOD (encoding, writer);
6074 LSTREAM_HAS_METHOD (encoding, rewinder);
6075 LSTREAM_HAS_METHOD (encoding, seekable_p);
6076 LSTREAM_HAS_METHOD (encoding, flusher);
6077 LSTREAM_HAS_METHOD (encoding, closer);
6078 LSTREAM_HAS_METHOD (encoding, marker);
6082 vars_of_file_coding (void)
6086 fcd = xnew (struct file_coding_dump);
6087 dump_add_root_struct_ptr (&fcd, &fcd_description);
6089 /* Initialize to something reasonable ... */
6090 for (i = 0; i < CODING_CATEGORY_LAST; i++)
6092 fcd->coding_category_system[i] = Qnil;
6093 fcd->coding_category_by_priority[i] = i;
6096 Fprovide (intern ("file-coding"));
6098 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
6099 Coding system used for TTY keyboard input.
6100 Not used under a windowing system.
6102 Vkeyboard_coding_system = Qnil;
6104 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
6105 Coding system used for TTY display output.
6106 Not used under a windowing system.
6108 Vterminal_coding_system = Qnil;
6110 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
6111 Overriding coding system used when reading from a file or process.
6112 You should bind this variable with `let', but do not set it globally.
6113 If this is non-nil, it specifies the coding system that will be used
6114 to decode input on read operations, such as from a file or process.
6115 It overrides `buffer-file-coding-system-for-read',
6116 `insert-file-contents-pre-hook', etc. Use those variables instead of
6117 this one for permanent changes to the environment. */ );
6118 Vcoding_system_for_read = Qnil;
6120 DEFVAR_LISP ("coding-system-for-write",
6121 &Vcoding_system_for_write /*
6122 Overriding coding system used when writing to a file or process.
6123 You should bind this variable with `let', but do not set it globally.
6124 If this is non-nil, it specifies the coding system that will be used
6125 to encode output for write operations, such as to a file or process.
6126 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
6127 Use those variables instead of this one for permanent changes to the
6129 Vcoding_system_for_write = Qnil;
6131 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
6132 Coding system used to convert pathnames when accessing files.
6134 Vfile_name_coding_system = Qnil;
6136 DEFVAR_LISP ("coded-charset-entity-reference-alist",
6137 &Vcoded_charset_entity_reference_alist /*
6138 Alist of coded-charset vs corresponding entity-reference.
6139 Each element looks like (CCS PREFIX CODE-COLUMNS CODE-TYPE).
6140 CCS is coded-charset.
6141 CODE-COLUMNS is columns of code-point of entity-reference.
6142 CODE-TYPE is format type of code-point of entity-reference.
6143 `d' means decimal value and `x' means hexadecimal value.
6145 Vcoded_charset_entity_reference_alist = Qnil;
6147 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
6148 Non-nil means the buffer contents are regarded as multi-byte form
6149 of characters, not a binary code. This affects the display, file I/O,
6150 and behaviors of various editing commands.
6152 Setting this to nil does not do anything.
6154 enable_multibyte_characters = 1;
6158 complex_vars_of_file_coding (void)
6160 staticpro (&Vcoding_system_hash_table);
6161 Vcoding_system_hash_table =
6162 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
6164 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
6165 dump_add_root_struct_ptr (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
6167 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
6169 struct codesys_prop csp; \
6171 csp.prop_type = (Prop_Type); \
6172 Dynarr_add (the_codesys_prop_dynarr, csp); \
6175 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
6176 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
6177 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
6178 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
6179 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
6180 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
6181 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
6183 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
6184 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
6185 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
6186 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
6187 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
6188 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
6189 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
6190 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
6191 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
6192 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
6193 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
6194 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
6195 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
6196 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
6197 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
6198 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
6199 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
6201 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
6202 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
6204 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qdisable_composition);
6205 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Quse_entity_reference);
6208 /* Need to create this here or we're really screwed. */
6210 (Qraw_text, Qno_conversion,
6211 build_string ("Raw text, which means it converts only line-break-codes."),
6212 list2 (Qmnemonic, build_string ("Raw")));
6215 (Qbinary, Qno_conversion,
6216 build_string ("Binary, which means it does not convert anything."),
6217 list4 (Qeol_type, Qlf,
6218 Qmnemonic, build_string ("Binary")));
6223 build_string ("Coding-system of ISO/IEC 10646 UTF-8."),
6224 list2 (Qmnemonic, build_string ("UTF8")));
6227 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
6229 Fdefine_coding_system_alias (Qfile_name, Qbinary);
6231 Fdefine_coding_system_alias (Qterminal, Qbinary);
6232 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
6234 /* Need this for bootstrapping */
6235 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
6236 Fget_coding_system (Qraw_text);
6239 fcd->coding_category_system[CODING_CATEGORY_UTF8]
6240 = Fget_coding_system (Qutf8);
6243 #if defined(MULE) && !defined(UTF2000)
6247 for (i = 0; i < countof (fcd->ucs_to_mule_table); i++)
6248 fcd->ucs_to_mule_table[i] = Qnil;
6250 staticpro (&mule_to_ucs_table);
6251 mule_to_ucs_table = Fmake_char_table(Qgeneric);
6252 #endif /* defined(MULE) && !defined(UTF2000) */