|
70
|
1 /* Code conversion functions.
|
|
|
2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
|
|
|
3 Copyright (C) 1995 Sun Microsystems, Inc.
|
|
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
|
|
|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
20 Boston, MA 02111-1307, USA. */
|
|
|
21
|
|
|
22 /* Synched up with: Mule 2.3. Not in FSF. */
|
|
|
23
|
|
|
24 /* Rewritten by Ben Wing <wing@666.com>. */
|
|
|
25
|
|
|
26 #include <config.h>
|
|
|
27 #include "lisp.h"
|
|
|
28
|
|
|
29 #include "buffer.h"
|
|
|
30 #include "elhash.h"
|
|
|
31 #include "insdel.h"
|
|
|
32 #include "lstream.h"
|
|
|
33 #include "mule-coding.h"
|
|
|
34
|
|
|
35 Lisp_Object Qfile_coding_system, Qcoding_system_error;
|
|
|
36
|
|
|
37 Lisp_Object Vkeyboard_coding_system;
|
|
|
38 Lisp_Object Vterminal_coding_system;
|
|
|
39 Lisp_Object Vprocess_input_coding_system;
|
|
|
40 Lisp_Object Vprocess_output_coding_system;
|
|
|
41 Lisp_Object Vpathname_coding_system;
|
|
|
42
|
|
|
43 /* Table of symbols identifying each coding category. */
|
|
|
44 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
|
|
|
45
|
|
|
46 /* Coding system currently associated with each coding category. */
|
|
|
47 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
|
|
|
48
|
|
|
49 /* Table of all coding categories in decreasing order of priority.
|
|
|
50 This describes a permutation of the possible coding categories. */
|
|
|
51 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
|
|
|
52
|
|
|
53 Lisp_Object Qcoding_system_p;
|
|
|
54
|
|
|
55 Lisp_Object Qbig5, Qshift_jis, Qno_conversion, Qccl, Qiso2022;
|
|
|
56 /* Qinternal in general.c */
|
|
|
57
|
|
|
58 Lisp_Object Qmnemonic, Qeol_type;
|
|
|
59 Lisp_Object Qcr, Qcrlf, Qlf;
|
|
|
60 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
|
|
|
61 Lisp_Object Qpost_read_conversion;
|
|
|
62 Lisp_Object Qpre_write_conversion;
|
|
|
63
|
|
|
64 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
|
|
|
65 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
|
|
|
66 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
|
|
|
67 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
|
|
|
68 Lisp_Object Qno_iso6429, Qescape_quoted;
|
|
|
69 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
|
|
|
70
|
|
|
71 Lisp_Object Qencode, Qdecode;
|
|
|
72
|
|
|
73 Lisp_Object Qctext;
|
|
|
74
|
|
|
75 Lisp_Object Vcoding_system_hashtable;
|
|
|
76
|
|
|
77 /* Additional information used by the ISO2022 decoder and detector. */
|
|
|
78 struct iso2022_decoder
|
|
|
79 {
|
|
|
80 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
81 through G3 variables. It is initialized from the array
|
|
|
82 INITIAL_CHARSET in CODESYS. */
|
|
|
83 Lisp_Object charset[4];
|
|
|
84
|
|
|
85 /* Which registers are currently invoked into the left (GL) and
|
|
|
86 right (GR) halves of the 8-bit encoding space? */
|
|
|
87 int register_left, register_right;
|
|
|
88
|
|
|
89 /* ISO_ESC holds a value indicating part of an escape sequence
|
|
|
90 that has already been seen. */
|
|
|
91 enum iso_esc_flag esc;
|
|
|
92
|
|
|
93 /* This records the bytes we've seen so far in an escape sequence,
|
|
|
94 in case the sequence is invalid (we spit out the bytes unchanged). */
|
|
|
95 unsigned char esc_bytes[8];
|
|
|
96
|
|
|
97 /* Index for next byte to store in ISO escape sequence. */
|
|
|
98 int esc_bytes_index;
|
|
|
99
|
|
|
100 /* Stuff seen so far when composing a string. */
|
|
|
101 unsigned_char_dynarr *composite_chars;
|
|
|
102
|
|
|
103 /* If we saw an invalid designation sequence for a particular
|
|
|
104 register, we flag it here and switch to ASCII. The next time we
|
|
|
105 see a valid designation for this register, we turn off the flag
|
|
|
106 and do the designation normally, but pretend the sequence was
|
|
|
107 invalid. The effect of all this is that (most of the time) the
|
|
|
108 escape sequences for both the switch to the unknown charset, and
|
|
|
109 the switch back to the known charset, get inserted literally into
|
|
|
110 the buffer and saved out as such. The hope is that we can
|
|
|
111 preserve the escape sequences so that the resulting written out
|
|
|
112 file makes sense. If we don't do any of this, the designation
|
|
|
113 to the invalid charset will be preserved but that switch back
|
|
|
114 to the known charset will probably get eaten because it was
|
|
|
115 the same charset that was already present in the register. */
|
|
|
116 unsigned char invalid_designated[4];
|
|
|
117
|
|
|
118 /* We try to do similar things as above for direction-switching
|
|
|
119 sequences. If we encountered a direction switch while an
|
|
|
120 invalid designation was present, or an invalid designation
|
|
|
121 just after a direction switch (i.e. no valid designation
|
|
|
122 encountered yet), we insert the direction-switch escape
|
|
|
123 sequence literally into the output stream, and later on
|
|
|
124 insert the corresponding direction-restoring escape sequence
|
|
|
125 literally also. */
|
|
|
126 int switched_dir_and_no_valid_charset_yet :1;
|
|
|
127 int invalid_switch_dir :1;
|
|
|
128
|
|
|
129 /* Tells the decoder to output the escape sequence literally
|
|
|
130 even though it was valid. Used in the games we play to
|
|
|
131 avoid lossage when we encounter invalid designations. */
|
|
|
132 int output_literally :1;
|
|
|
133 /* We encountered a direction switch followed by an invalid
|
|
|
134 designation. We didn't output the direction switch
|
|
|
135 literally because we didn't know about the invalid designation;
|
|
|
136 but we have to do so now. */
|
|
|
137 int output_direction_sequence :1;
|
|
|
138 };
|
|
|
139
|
|
|
140 Lisp_Object Fcopy_coding_system (Lisp_Object old_coding_system,
|
|
|
141 Lisp_Object new_name);
|
|
|
142 struct detection_state;
|
|
|
143 static int detect_coding_shift_jis (struct detection_state *st,
|
|
|
144 CONST unsigned char *src,
|
|
|
145 unsigned int n);
|
|
|
146 static void decode_coding_shift_jis (Lstream *decoding,
|
|
|
147 CONST unsigned char *src,
|
|
|
148 unsigned_char_dynarr *dst,
|
|
|
149 unsigned int n);
|
|
|
150 static void encode_coding_shift_jis (Lstream *encoding,
|
|
|
151 CONST unsigned char *src,
|
|
|
152 unsigned_char_dynarr *dst,
|
|
|
153 unsigned int n);
|
|
|
154 static int detect_coding_big5 (struct detection_state *st,
|
|
|
155 CONST unsigned char *src,
|
|
|
156 unsigned int n);
|
|
|
157 static void decode_coding_big5 (Lstream *decoding,
|
|
|
158 CONST unsigned char *src,
|
|
|
159 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
160 static void encode_coding_big5 (Lstream *encoding,
|
|
|
161 CONST unsigned char *src,
|
|
|
162 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
163 static int postprocess_iso2022_mask (int mask);
|
|
|
164 static void reset_iso2022 (Lisp_Object coding_system,
|
|
|
165 struct iso2022_decoder *iso);
|
|
|
166 static int detect_coding_iso2022 (struct detection_state *st,
|
|
|
167 CONST unsigned char *src,
|
|
|
168 unsigned int n);
|
|
|
169 static void decode_coding_iso2022 (Lstream *decoding,
|
|
|
170 CONST unsigned char *src,
|
|
|
171 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
172 static void encode_coding_iso2022 (Lstream *encoding,
|
|
|
173 CONST unsigned char *src,
|
|
|
174 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
175 static void decode_coding_no_conversion (Lstream *decoding,
|
|
|
176 CONST unsigned char *src,
|
|
|
177 unsigned_char_dynarr *dst,
|
|
|
178 unsigned int n);
|
|
|
179 static void encode_coding_no_conversion (Lstream *encoding,
|
|
|
180 CONST unsigned char *src,
|
|
|
181 unsigned_char_dynarr *dst,
|
|
|
182 unsigned int n);
|
|
|
183 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
|
184 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
185 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
|
186 unsigned_char_dynarr *dst, unsigned int n);
|
|
|
187
|
|
|
188 struct codesys_prop
|
|
|
189 {
|
|
|
190 Lisp_Object sym;
|
|
|
191 int prop_type;
|
|
|
192 };
|
|
|
193
|
|
|
194 typedef struct codesys_prop_dynarr_type
|
|
|
195 {
|
|
|
196 Dynarr_declare (struct codesys_prop);
|
|
|
197 } codesys_prop_dynarr;
|
|
|
198
|
|
|
199 codesys_prop_dynarr *the_codesys_prop_dynarr;
|
|
|
200
|
|
|
201 enum codesys_prop_enum
|
|
|
202 {
|
|
|
203 CODESYS_PROP_ALL_OK,
|
|
|
204 CODESYS_PROP_ISO2022,
|
|
|
205 CODESYS_PROP_CCL
|
|
|
206 };
|
|
|
207
|
|
|
208
|
|
|
209 /************************************************************************/
|
|
|
210 /* Coding system functions */
|
|
|
211 /************************************************************************/
|
|
|
212
|
|
|
213 static Lisp_Object mark_coding_system (Lisp_Object, void (*) (Lisp_Object));
|
|
|
214 static void print_coding_system (Lisp_Object, Lisp_Object, int);
|
|
|
215 static void finalize_coding_system (void *header, int for_disksave);
|
|
|
216
|
|
|
217 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
|
|
|
218 mark_coding_system, print_coding_system,
|
|
|
219 finalize_coding_system,
|
|
|
220 0, 0, struct Lisp_Coding_System);
|
|
|
221
|
|
|
222 static Lisp_Object
|
|
|
223 mark_coding_system (Lisp_Object obj, void (*markobj) (Lisp_Object))
|
|
|
224 {
|
|
|
225 struct Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
|
|
|
226 int i;
|
|
|
227
|
|
|
228 (markobj) (CODING_SYSTEM_NAME (codesys));
|
|
|
229 (markobj) (CODING_SYSTEM_DOC_STRING (codesys));
|
|
|
230 (markobj) (CODING_SYSTEM_MNEMONIC (codesys));
|
|
|
231 (markobj) (CODING_SYSTEM_EOL_LF (codesys));
|
|
|
232 (markobj) (CODING_SYSTEM_EOL_CRLF (codesys));
|
|
|
233 (markobj) (CODING_SYSTEM_EOL_CR (codesys));
|
|
|
234 switch (CODING_SYSTEM_TYPE (codesys))
|
|
|
235 {
|
|
|
236 case CODESYS_ISO2022:
|
|
|
237 for (i = 0; i < 4; i++)
|
|
|
238 (markobj) (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
|
|
|
239 if (codesys->iso2022.input_conv)
|
|
|
240 {
|
|
|
241 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
|
|
|
242 {
|
|
|
243 struct charset_conversion_spec *ccs =
|
|
|
244 Dynarr_atp (codesys->iso2022.input_conv, i);
|
|
|
245 (markobj) (ccs->from_charset);
|
|
|
246 (markobj) (ccs->to_charset);
|
|
|
247 }
|
|
|
248 }
|
|
|
249 if (codesys->iso2022.output_conv)
|
|
|
250 {
|
|
|
251 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
|
|
|
252 {
|
|
|
253 struct charset_conversion_spec *ccs =
|
|
|
254 Dynarr_atp (codesys->iso2022.output_conv, i);
|
|
|
255 (markobj) (ccs->from_charset);
|
|
|
256 (markobj) (ccs->to_charset);
|
|
|
257 }
|
|
|
258 }
|
|
|
259 break;
|
|
|
260
|
|
|
261 case CODESYS_CCL:
|
|
|
262 (markobj) (CODING_SYSTEM_CCL_DECODE (codesys));
|
|
|
263 (markobj) (CODING_SYSTEM_CCL_ENCODE (codesys));
|
|
|
264 break;
|
|
|
265 default:
|
|
|
266 break;
|
|
|
267 }
|
|
|
268
|
|
|
269 (markobj) (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
|
270 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
|
271 }
|
|
|
272
|
|
|
273 static void
|
|
|
274 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
275 int escapeflag)
|
|
|
276 {
|
|
|
277 struct Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
278 if (print_readably)
|
|
|
279 error ("printing unreadable object #<coding_system 0x%x>",
|
|
|
280 c->header.uid);
|
|
|
281
|
|
|
282 write_c_string ("#<coding_system ", printcharfun);
|
|
|
283 print_internal (c->name, printcharfun, 1);
|
|
|
284 write_c_string (">", printcharfun);
|
|
|
285 }
|
|
|
286
|
|
|
287 static void
|
|
|
288 finalize_coding_system (void *header, int for_disksave)
|
|
|
289 {
|
|
|
290 struct Lisp_Coding_System *c = (struct Lisp_Coding_System *) header;
|
|
|
291 /* Since coding systems never go away, this function is not
|
|
|
292 necessary. But it would be necessary if we changed things
|
|
|
293 so that coding systems could go away. */
|
|
|
294 if (!for_disksave) /* see comment in lstream.c */
|
|
|
295 {
|
|
|
296 switch (CODING_SYSTEM_TYPE (c))
|
|
|
297 {
|
|
|
298 case CODESYS_ISO2022:
|
|
|
299 if (c->iso2022.input_conv)
|
|
|
300 {
|
|
|
301 Dynarr_free (c->iso2022.input_conv);
|
|
|
302 c->iso2022.input_conv = 0;
|
|
|
303 }
|
|
|
304 if (c->iso2022.output_conv)
|
|
|
305 {
|
|
|
306 Dynarr_free (c->iso2022.output_conv);
|
|
|
307 c->iso2022.output_conv = 0;
|
|
|
308 }
|
|
|
309 break;
|
|
|
310
|
|
|
311 default:
|
|
|
312 break;
|
|
|
313 }
|
|
|
314 }
|
|
|
315 }
|
|
|
316
|
|
|
317 static int
|
|
|
318 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
319 {
|
|
|
320 CHECK_SYMBOL (symbol);
|
|
|
321 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
322 else if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
323 else if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
324 else if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
325 else
|
|
|
326 signal_simple_error ("Unrecognized eol type", symbol);
|
|
|
327
|
|
|
328 return 0; /* not reached */
|
|
|
329 }
|
|
|
330
|
|
|
331 static Lisp_Object
|
|
|
332 eol_type_to_symbol (int eol_type)
|
|
|
333 {
|
|
|
334 switch (eol_type)
|
|
|
335 {
|
|
|
336 case EOL_LF: return Qlf;
|
|
|
337 case EOL_CRLF: return Qcrlf;
|
|
|
338 case EOL_CR: return Qcr;
|
|
|
339 case EOL_AUTODETECT: return Qnil;
|
|
|
340 default: abort ();
|
|
|
341 }
|
|
|
342
|
|
|
343 return Qnil; /* not reached */
|
|
|
344 }
|
|
|
345
|
|
|
346 static void
|
|
|
347 setup_eol_coding_systems (struct Lisp_Coding_System *codesys)
|
|
|
348 {
|
|
|
349 Lisp_Object codesys_obj = Qnil;
|
|
|
350 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
|
351 char *codesys_name = (char *) alloca (len + 7);
|
|
|
352 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
|
353
|
|
|
354 /* kludge */
|
|
|
355
|
|
|
356 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
357
|
|
|
358 memcpy (codesys_name,
|
|
|
359 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
|
360
|
|
|
361 #define DEFINE_SUB_CODESYS(op_sys, Type) do { \
|
|
|
362 strcpy (codesys_name + len, "-" op_sys); \
|
|
|
363 codesys_name_sym = intern (codesys_name); \
|
|
|
364 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
|
365 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
|
366 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
|
|
367 } while (0)
|
|
|
368
|
|
|
369 DEFINE_SUB_CODESYS("unix", EOL_LF);
|
|
|
370 DEFINE_SUB_CODESYS("dos", EOL_CRLF);
|
|
|
371 DEFINE_SUB_CODESYS("mac", EOL_CR);
|
|
|
372 }
|
|
|
373
|
|
|
374 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
375 T if OBJECT is a coding system.
|
|
|
376 A coding system is an object that defines how text containing multiple
|
|
|
377 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
378 The coding system is used to decode the stream into a series of
|
|
|
379 characters (which may be from multiple charsets) when the text is read
|
|
|
380 from a file or process, and is used to encode the text back into the
|
|
|
381 same format when it is written out to a file or process.
|
|
|
382
|
|
|
383 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
384 Text, which is used for inter-client data under the X Window System)
|
|
|
385 use escape sequences to switch between different charsets -- Japanese
|
|
|
386 Kanji, for example, is invoked with \"ESC $ ( B\"; ASCII is invoked
|
|
|
387 with \"ESC ( B\"; and Cyrillic is invoked with \"ESC - L\". See
|
|
|
388 `make-coding-system' for more information.
|
|
|
389
|
|
|
390 Coding systems are normally identified using a symbol, and the
|
|
|
391 symbol is accepted in place of the actual coding system object whenever
|
|
|
392 a coding system is called for. (This is similar to how faces work.)
|
|
|
393 */
|
|
|
394 (object))
|
|
|
395 {
|
|
|
396 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
397 }
|
|
|
398
|
|
|
399 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
400 Retrieve the coding system of the given name.
|
|
|
401
|
|
|
402 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
403 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
404 If there is no such coding system, nil is returned. Otherwise the
|
|
|
405 associated coding system object is returned.
|
|
|
406 */
|
|
|
407 (coding_system_or_name))
|
|
|
408 {
|
|
|
409 if (NILP (coding_system_or_name))
|
|
|
410 coding_system_or_name = Qbinary;
|
|
|
411 if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
412 return coding_system_or_name;
|
|
|
413 CHECK_SYMBOL (coding_system_or_name);
|
|
|
414
|
|
|
415 return Fgethash (coding_system_or_name, Vcoding_system_hashtable, Qnil);
|
|
|
416 }
|
|
|
417
|
|
|
418 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
419 Retrieve the coding system of the given name.
|
|
|
420 Same as `find-coding-system' except that if there is no such
|
|
|
421 coding system, an error is signaled instead of returning nil.
|
|
|
422 */
|
|
|
423 (name))
|
|
|
424 {
|
|
|
425 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
426
|
|
|
427 if (NILP (coding_system))
|
|
|
428 signal_simple_error ("No such coding system", name);
|
|
|
429 return coding_system;
|
|
|
430 }
|
|
|
431
|
|
|
432 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
433 actual coding system object as the value. Occasionally we need to use them
|
|
|
434 in a list format. These routines provide us with that. */
|
|
|
435 struct coding_system_list_closure
|
|
|
436 {
|
|
|
437 Lisp_Object *coding_system_list;
|
|
|
438 };
|
|
|
439
|
|
|
440 static void
|
|
|
441 add_coding_system_to_list_mapper (CONST void *hash_key, void *hash_contents,
|
|
|
442 void *coding_system_list_closure)
|
|
|
443 {
|
|
|
444 /* This function can GC */
|
|
|
445 Lisp_Object key, contents;
|
|
|
446 Lisp_Object *coding_system_list;
|
|
|
447 struct coding_system_list_closure *chcl = coding_system_list_closure;
|
|
|
448 CVOID_TO_LISP (key, hash_key);
|
|
|
449 VOID_TO_LISP (contents, hash_contents);
|
|
|
450 coding_system_list = chcl->coding_system_list;
|
|
|
451
|
|
|
452 *coding_system_list = Fcons (XCODING_SYSTEM (contents)->name,
|
|
|
453 *coding_system_list);
|
|
|
454 }
|
|
|
455
|
|
|
456 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
457 Return a list of the names of all defined coding systems.
|
|
|
458 */
|
|
|
459 ())
|
|
|
460 {
|
|
|
461 Lisp_Object coding_system_list = Qnil;
|
|
|
462 struct gcpro gcpro1;
|
|
|
463 struct coding_system_list_closure coding_system_list_closure;
|
|
|
464
|
|
|
465 GCPRO1 (coding_system_list);
|
|
|
466 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
|
467 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hashtable,
|
|
|
468 &coding_system_list_closure);
|
|
|
469 UNGCPRO;
|
|
|
470
|
|
|
471 return coding_system_list;
|
|
|
472 }
|
|
|
473
|
|
|
474 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
475 Return the name of the given coding system.
|
|
|
476 */
|
|
|
477 (coding_system))
|
|
|
478 {
|
|
|
479 coding_system = Fget_coding_system (coding_system);
|
|
|
480 return (XCODING_SYSTEM_NAME (coding_system));
|
|
|
481 }
|
|
|
482
|
|
|
483 static struct Lisp_Coding_System *
|
|
|
484 allocate_coding_system (int type, Lisp_Object name)
|
|
|
485 {
|
|
|
486 struct Lisp_Coding_System *codesys;
|
|
|
487
|
|
|
488 codesys = (struct Lisp_Coding_System *)
|
|
|
489 alloc_lcrecord (sizeof (struct Lisp_Coding_System), lrecord_coding_system);
|
|
|
490
|
|
|
491 zero_lcrecord (codesys);
|
|
|
492 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
493 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
494 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
495 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
496 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
497 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
498 CODING_SYSTEM_TYPE (codesys) = type;
|
|
|
499
|
|
|
500 if (type == CODESYS_ISO2022)
|
|
|
501 {
|
|
|
502 int i;
|
|
|
503 for (i = 0; i < 4; i++)
|
|
|
504 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
505 }
|
|
|
506 else if (type == CODESYS_CCL)
|
|
|
507 {
|
|
|
508 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
509 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
510 }
|
|
|
511
|
|
|
512 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
513
|
|
|
514 return codesys;
|
|
|
515 }
|
|
|
516
|
|
|
517 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
518 program, parse it into STORE_HERE. */
|
|
|
519
|
|
|
520 static void
|
|
|
521 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
522 Lisp_Object spec_list)
|
|
|
523 {
|
|
|
524 Lisp_Object rest;
|
|
|
525
|
|
|
526 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
527 {
|
|
|
528 Lisp_Object car = XCAR (rest);
|
|
|
529 Lisp_Object from, to;
|
|
|
530 struct charset_conversion_spec spec;
|
|
|
531
|
|
|
532 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
533 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
534 from = Fget_charset (XCAR (car));
|
|
|
535 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
536 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
537 signal_simple_error_2
|
|
|
538 ("Attempted conversion between different charset types",
|
|
|
539 from, to);
|
|
|
540 spec.from_charset = from;
|
|
|
541 spec.to_charset = to;
|
|
|
542
|
|
|
543 Dynarr_add (store_here, spec);
|
|
|
544 }
|
|
|
545 }
|
|
|
546
|
|
|
547 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
548 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
549
|
|
|
550 If LOAD_HERE is 0, return Qnil. */
|
|
|
551
|
|
|
552 static Lisp_Object
|
|
|
553 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
554 {
|
|
|
555 int i;
|
|
|
556 Lisp_Object result = Qnil;
|
|
|
557
|
|
|
558 if (!load_here)
|
|
|
559 return Qnil;
|
|
|
560 for (i = 0; i < Dynarr_length (load_here); i++)
|
|
|
561 {
|
|
|
562 struct charset_conversion_spec *ccs =
|
|
|
563 Dynarr_atp (load_here, i);
|
|
|
564 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
565 }
|
|
|
566
|
|
|
567 return Fnreverse (result);
|
|
|
568 }
|
|
|
569
|
|
|
570 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
571 Register symbol NAME as a coding system.
|
|
|
572
|
|
|
573 TYPE describes the conversion method used and should be one of
|
|
|
574
|
|
|
575 nil or 'autodetect
|
|
|
576 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
577 used in the file.
|
|
|
578 'no-conversion
|
|
|
579 No conversion. Use this for binary files and such. On output,
|
|
|
580 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
581 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
582 characters will only be present if you explicitly insert them.)
|
|
|
583 'shift-jis
|
|
|
584 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
|
585 'iso2022
|
|
|
586 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
587 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
588 standard Unix encoding for Japanese and other languages), and
|
|
|
589 Compound Text (the encoding used in X11). You can specify more
|
|
|
590 specific information about the conversion with the FLAGS argument.
|
|
|
591 'big5
|
|
|
592 Big5 (the encoding commonly used for Taiwanese).
|
|
|
593 'ccl
|
|
|
594 The conversion is performed using a user-written pseudo-code
|
|
|
595 program. CCL (Code Conversion Language) is the name of this
|
|
|
596 pseudo-code.
|
|
|
597 'internal
|
|
|
598 Write out or read in the raw contents of the memory representing
|
|
|
599 the buffer's text. This is primarily useful for debugging
|
|
|
600 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
601 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
602 WARNING: Reading in a file using 'internal conversion can result
|
|
|
603 in an internal inconsistency in the memory representing a
|
|
|
604 buffer's text, which will produce unpredictable results and may
|
|
|
605 cause XEmacs to crash. Under normal circumstances you should
|
|
|
606 never use 'internal conversion.
|
|
|
607
|
|
|
608 DOC-STRING is a string describing the coding system.
|
|
|
609
|
|
|
610 PROPS is a property list, describing the specific nature of the
|
|
|
611 character set. Recognized properties are:
|
|
|
612
|
|
|
613 'mnemonic
|
|
|
614 String to be displayed in the modeline when this coding system is
|
|
|
615 active.
|
|
|
616
|
|
|
617 'eol-type
|
|
|
618 End-of-line conversion to be used. It should be one of
|
|
|
619
|
|
|
620 nil
|
|
|
621 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
622 or CR). Also generate subsidiary coding systems named
|
|
|
623 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
624 identical to this coding system but have an EOL-TYPE
|
|
|
625 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
626 'lf
|
|
|
627 The end of a line is marked externally using ASCII LF.
|
|
|
628 Since this is also the way that XEmacs represents an
|
|
|
629 end-of-line internally, specifying this option results
|
|
|
630 in no end-of-line conversion. This is the standard
|
|
|
631 format for Unix text files.
|
|
|
632 'crlf
|
|
|
633 The end of a line is marked externally using ASCII
|
|
|
634 CRLF. This is the standard format for MS-DOS text
|
|
|
635 files.
|
|
|
636 'cr
|
|
|
637 The end of a line is marked externally using ASCII CR.
|
|
|
638 This is the standard format for Macintosh text files.
|
|
|
639 t
|
|
|
640 Automatically detect the end-of-line type but do not
|
|
|
641 generate subsidiary coding systems. (This value is
|
|
|
642 converted to nil when stored internally, and
|
|
|
643 `coding-system-property' will return nil.)
|
|
|
644
|
|
|
645 'post-read-conversion
|
|
|
646 Function called after a file has been read in, to perform the
|
|
|
647 decoding. Called with two arguments, BEG and END, denoting
|
|
|
648 a region of the current buffer to be decoded.
|
|
|
649
|
|
|
650 'pre-write-conversion
|
|
|
651 Function called before a file is written out, to perform the
|
|
|
652 encoding. Called with two arguments, BEG and END, denoting
|
|
|
653 a region of the current buffer to be encoded.
|
|
|
654
|
|
|
655
|
|
|
656 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
657
|
|
|
658 'charset-g0
|
|
|
659 'charset-g1
|
|
|
660 'charset-g2
|
|
|
661 'charset-g3
|
|
|
662 The character set initially designated to the G0 - G3 registers.
|
|
|
663 The value should be one of
|
|
|
664
|
|
|
665 -- A charset object (designate that character set)
|
|
|
666 -- nil (do not ever use this register)
|
|
|
667 -- t (no character set is initially designated to
|
|
|
668 the register, but may be later on; this automatically
|
|
|
669 sets the corresponding `force-g*-on-output' property)
|
|
|
670
|
|
|
671 'force-g0-on-output
|
|
|
672 'force-g1-on-output
|
|
|
673 'force-g2-on-output
|
|
|
674 'force-g2-on-output
|
|
|
675 If non-nil, send an explicit designation sequence on output before
|
|
|
676 using the specified register.
|
|
|
677
|
|
|
678 'short
|
|
|
679 If non-nil, use the short forms \"ESC $ @\", \"ESC $ A\", and
|
|
|
680 \"ESC $ B\" on output in place of the full designation sequences
|
|
|
681 \"ESC $ ( @\", \"ESC $ ( A\", and \"ESC $ ( B\".
|
|
|
682
|
|
|
683 'no-ascii-eol
|
|
|
684 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
685 Setting this to non-nil also suppresses other state-resetting that
|
|
|
686 normally happens at the end of a line.
|
|
|
687
|
|
|
688 'no-ascii-cntl
|
|
|
689 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
690
|
|
|
691 'seven
|
|
|
692 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
693 environment.
|
|
|
694
|
|
|
695 'lock-shift
|
|
|
696 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
697 or designation by escape sequence.
|
|
|
698
|
|
|
699 'no-iso6429
|
|
|
700 If non-nil, don't use ISO6429's direction specification.
|
|
|
701
|
|
|
702 'escape-quoted
|
|
|
703 If non-nil, literal control characters that are the same as
|
|
|
704 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
705 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
706 SS3 (0x8F), and CSI (0x9B)) are \"quoted\" with an escape character
|
|
|
707 so that they can be properly distinguished from an escape sequence.
|
|
|
708 (Note that doing this results in a non-portable encoding.) This
|
|
|
709 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
710 is a good choice for a quoting character because there are no
|
|
|
711 escape sequences whose second byte is a character from the Control-0
|
|
|
712 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
713 ISO2022 standard.
|
|
|
714
|
|
|
715 'input-charset-conversion
|
|
|
716 A list of conversion specifications, specifying conversion of
|
|
|
717 characters in one charset to another when decoding is performed.
|
|
|
718 Each specification is a list of two elements: the source charset,
|
|
|
719 and the destination charset.
|
|
|
720
|
|
|
721 'output-charset-conversion
|
|
|
722 A list of conversion specifications, specifying conversion of
|
|
|
723 characters in one charset to another when encoding is performed.
|
|
|
724 The form of each specification is the same as for
|
|
|
725 'input-charset-conversion.
|
|
|
726
|
|
|
727
|
|
|
728 The following additional properties are recognized (and required)
|
|
|
729 if TYPE is 'ccl:
|
|
|
730
|
|
|
731 'decode
|
|
|
732 CCL program used for decoding (converting to internal format).
|
|
|
733
|
|
|
734 'encode
|
|
|
735 CCL program used for encoding (converting to external format).
|
|
|
736 */
|
|
|
737 (name, type, doc_string, props))
|
|
|
738 {
|
|
|
739 struct Lisp_Coding_System *codesys;
|
|
|
740 Lisp_Object rest, key, value;
|
|
|
741 int ty;
|
|
|
742 int need_to_setup_eol_systems = 1;
|
|
|
743
|
|
|
744 /* Convert type to constant */
|
|
|
745 if (NILP (type) || EQ (type, Qautodetect)) { ty = CODESYS_AUTODETECT; }
|
|
|
746 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
747 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
748 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
|
749 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
750 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
|
751 #ifdef DEBUG_XEMACS
|
|
|
752 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
|
753 #endif
|
|
|
754 else
|
|
|
755 signal_simple_error ("Invalid coding system type", type);
|
|
|
756
|
|
|
757 CHECK_SYMBOL (name);
|
|
|
758
|
|
|
759 codesys = allocate_coding_system (ty, name);
|
|
|
760
|
|
|
761 if (NILP (doc_string))
|
|
|
762 doc_string = build_string ("");
|
|
|
763 else
|
|
|
764 CHECK_STRING (doc_string);
|
|
|
765 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
766
|
|
|
767 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
768 {
|
|
|
769 if (EQ (key, Qmnemonic))
|
|
|
770 {
|
|
|
771 if (!NILP (value))
|
|
|
772 CHECK_STRING (value);
|
|
|
773 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
774 }
|
|
|
775
|
|
|
776 else if (EQ (key, Qeol_type))
|
|
|
777 {
|
|
|
778 need_to_setup_eol_systems = NILP (value);
|
|
|
779 if (EQ (value, Qt))
|
|
|
780 value = Qnil;
|
|
|
781 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
782 }
|
|
|
783
|
|
|
784 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
785 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
786 else if (ty == CODESYS_ISO2022)
|
|
|
787 {
|
|
|
788 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
789 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
790 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
791
|
|
|
792 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
793 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
794 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
795 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
|
796
|
|
|
797 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
798 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
799
|
|
|
800 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
801 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
802 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
803 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
804
|
|
|
805 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
806 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
|
807
|
|
|
808 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
809 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
810 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
811 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
812 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
813 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
814 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
|
815
|
|
|
816 else if (EQ (key, Qinput_charset_conversion))
|
|
|
817 {
|
|
|
818 codesys->iso2022.input_conv =
|
|
|
819 Dynarr_new (struct charset_conversion_spec);
|
|
|
820 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
821 value);
|
|
|
822 }
|
|
|
823 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
824 {
|
|
|
825 codesys->iso2022.output_conv =
|
|
|
826 Dynarr_new (struct charset_conversion_spec);
|
|
|
827 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
828 value);
|
|
|
829 }
|
|
|
830 else
|
|
|
831 signal_simple_error ("Unrecognized property", key);
|
|
|
832 }
|
|
|
833 else if (EQ (type, Qccl))
|
|
|
834 {
|
|
|
835 if (EQ (key, Qdecode))
|
|
|
836 {
|
|
|
837 CHECK_VECTOR (value);
|
|
|
838 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
839 }
|
|
|
840 else if (EQ (key, Qencode))
|
|
|
841 {
|
|
|
842 CHECK_VECTOR (value);
|
|
|
843 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
844 }
|
|
|
845 else
|
|
|
846 signal_simple_error ("Unrecognized property", key);
|
|
|
847 }
|
|
|
848 else
|
|
|
849 signal_simple_error ("Unrecognized property", key);
|
|
|
850 }
|
|
|
851
|
|
|
852 if (need_to_setup_eol_systems)
|
|
|
853 setup_eol_coding_systems (codesys);
|
|
|
854
|
|
|
855 {
|
|
|
856 Lisp_Object codesys_obj;
|
|
|
857 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
858 Fputhash (name, codesys_obj, Vcoding_system_hashtable);
|
|
|
859 return codesys_obj;
|
|
|
860 }
|
|
|
861 }
|
|
|
862
|
|
|
863 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
864 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
865 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
866 be created.
|
|
|
867 */
|
|
|
868 (old_coding_system, new_name))
|
|
|
869 {
|
|
|
870 Lisp_Object new_coding_system;
|
|
|
871 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
872 new_coding_system = Ffind_coding_system (new_name);
|
|
|
873 if (NILP (new_coding_system))
|
|
|
874 {
|
|
|
875 XSETCODING_SYSTEM (new_coding_system,
|
|
|
876 allocate_coding_system
|
|
|
877 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
878 new_name));
|
|
|
879 Fputhash (new_name, new_coding_system, Vcoding_system_hashtable);
|
|
|
880 }
|
|
|
881
|
|
|
882 {
|
|
|
883 struct Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
884 struct Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
|
885 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
886 ((char *) from) + sizeof (from->header),
|
|
|
887 sizeof (*from) - sizeof (from->header));
|
|
|
888 to->name = new_name;
|
|
|
889 }
|
|
|
890 return new_coding_system;
|
|
|
891 }
|
|
|
892
|
|
|
893 static Lisp_Object
|
|
|
894 subsidiary_coding_system (Lisp_Object coding_system, int eol_type)
|
|
|
895 {
|
|
|
896 struct Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
897 Lisp_Object new_coding_system;
|
|
|
898
|
|
|
899 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
900 return coding_system;
|
|
|
901 if (eol_type == EOL_AUTODETECT)
|
|
|
902 return coding_system;
|
|
|
903
|
|
|
904 switch (eol_type)
|
|
|
905 {
|
|
|
906 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
907 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
908 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
909 default: abort ();
|
|
|
910 }
|
|
|
911
|
|
|
912 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
913 }
|
|
|
914
|
|
|
915 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
916 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
917 */
|
|
|
918 (coding_system, eol_type))
|
|
|
919 {
|
|
|
920 coding_system = Fget_coding_system (coding_system);
|
|
|
921
|
|
|
922 return subsidiary_coding_system (coding_system,
|
|
|
923 symbol_to_eol_type (eol_type));
|
|
|
924 }
|
|
|
925
|
|
|
926
|
|
|
927 /************************************************************************/
|
|
|
928 /* Coding system accessors */
|
|
|
929 /************************************************************************/
|
|
|
930
|
|
|
931 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
932 Return the doc string for CODING-SYSTEM.
|
|
|
933 */
|
|
|
934 (coding_system))
|
|
|
935 {
|
|
|
936 coding_system = Fget_coding_system (coding_system);
|
|
|
937 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
938 }
|
|
|
939
|
|
|
940 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
941 Return the type of CODING-SYSTEM.
|
|
|
942 */
|
|
|
943 (coding_system))
|
|
|
944 {
|
|
|
945 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
946 {
|
|
|
947 case CODESYS_AUTODETECT: return Qautodetect;
|
|
|
948 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
949 case CODESYS_ISO2022: return Qiso2022;
|
|
|
950 case CODESYS_BIG5: return Qbig5;
|
|
|
951 case CODESYS_CCL: return Qccl;
|
|
|
952 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
953 #ifdef DEBUG_XEMACS
|
|
|
954 case CODESYS_INTERNAL: return Qinternal;
|
|
|
955 #endif
|
|
|
956 default:
|
|
|
957 abort ();
|
|
|
958 }
|
|
|
959
|
|
|
960 return Qnil; /* not reached */
|
|
|
961 }
|
|
|
962
|
|
|
963 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
964 Return the PROP property of CODING-SYSTEM.
|
|
|
965 */
|
|
|
966 (coding_system, prop))
|
|
|
967 {
|
|
|
968 int i, ok = 0;
|
|
|
969 enum coding_system_type type;
|
|
|
970
|
|
|
971 coding_system = Fget_coding_system (coding_system);
|
|
|
972 CHECK_SYMBOL (prop);
|
|
|
973 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
974
|
|
|
975 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
976 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
977 {
|
|
|
978 ok = 1;
|
|
|
979 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
980 {
|
|
|
981 case CODESYS_PROP_ALL_OK:
|
|
|
982 break;
|
|
|
983
|
|
|
984 case CODESYS_PROP_ISO2022:
|
|
|
985 if (type != CODESYS_ISO2022)
|
|
|
986 signal_simple_error
|
|
|
987 ("Property only valid in ISO2022 coding systems",
|
|
|
988 prop);
|
|
|
989 break;
|
|
|
990
|
|
|
991 case CODESYS_PROP_CCL:
|
|
|
992 if (type != CODESYS_CCL)
|
|
|
993 signal_simple_error
|
|
|
994 ("Property only valid in CCL coding systems",
|
|
|
995 prop);
|
|
|
996 break;
|
|
|
997
|
|
|
998 default:
|
|
|
999 abort ();
|
|
|
1000 }
|
|
|
1001 }
|
|
|
1002
|
|
|
1003 if (!ok)
|
|
|
1004 signal_simple_error ("Unrecognized property", prop);
|
|
|
1005
|
|
|
1006 if (EQ (prop, Qname))
|
|
|
1007 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1008 else if (EQ (prop, Qtype))
|
|
|
1009 return Fcoding_system_type (coding_system);
|
|
|
1010 else if (EQ (prop, Qdoc_string))
|
|
|
1011 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1012 else if (EQ (prop, Qmnemonic))
|
|
|
1013 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1014 else if (EQ (prop, Qeol_type))
|
|
|
1015 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1016 else if (EQ (prop, Qeol_lf))
|
|
|
1017 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1018 else if (EQ (prop, Qeol_crlf))
|
|
|
1019 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1020 else if (EQ (prop, Qeol_cr))
|
|
|
1021 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1022 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1023 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1024 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1025 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1026 else if (type == CODESYS_ISO2022)
|
|
|
1027 {
|
|
|
1028 #define INITIAL_CHARSET(charset_num) \
|
|
|
1029 (XCHARSET_NAME (XCODING_SYSTEM_ISO2022_INITIAL_CHARSET \
|
|
|
1030 (coding_system, charset_num)))
|
|
|
1031
|
|
|
1032 if (EQ (prop, Qcharset_g0)) return INITIAL_CHARSET (0);
|
|
|
1033 else if (EQ (prop, Qcharset_g1)) return INITIAL_CHARSET (1);
|
|
|
1034 else if (EQ (prop, Qcharset_g2)) return INITIAL_CHARSET (2);
|
|
|
1035 else if (EQ (prop, Qcharset_g3)) return INITIAL_CHARSET (3);
|
|
|
1036
|
|
|
1037 #define FORCE_CHARSET(charset_num) \
|
|
|
1038 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1039 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1040
|
|
|
1041 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1042 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1043 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1044 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1045
|
|
|
1046 #define LISP_BOOLEAN(prop) \
|
|
|
1047 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
|
1048
|
|
|
1049 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1050 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1051 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1052 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1053 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1054 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1055 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
|
1056
|
|
|
1057 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1058 return
|
|
|
1059 unparse_charset_conversion_specs
|
|
|
1060 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1061 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1062 return
|
|
|
1063 unparse_charset_conversion_specs
|
|
|
1064 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1065 else
|
|
|
1066 abort ();
|
|
|
1067 }
|
|
|
1068 else if (type == CODESYS_CCL)
|
|
|
1069 {
|
|
|
1070 if (EQ (prop, Qdecode))
|
|
|
1071 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1072 else if (EQ (prop, Qencode))
|
|
|
1073 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1074 else
|
|
|
1075 abort ();
|
|
|
1076 }
|
|
|
1077 else
|
|
|
1078 abort ();
|
|
|
1079
|
|
|
1080 return Qnil; /* not reached */
|
|
|
1081 }
|
|
|
1082
|
|
|
1083
|
|
|
1084 /************************************************************************/
|
|
|
1085 /* Coding category functions */
|
|
|
1086 /************************************************************************/
|
|
|
1087
|
|
|
1088 static int
|
|
|
1089 decode_coding_category (Lisp_Object symbol)
|
|
|
1090 {
|
|
|
1091 int i;
|
|
|
1092
|
|
|
1093 CHECK_SYMBOL (symbol);
|
|
|
1094 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1095 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1096 return i;
|
|
|
1097
|
|
|
1098 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1099 return 0; /* not reached */
|
|
|
1100 }
|
|
|
1101
|
|
|
1102 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1103 Return a list of all recognized coding categories.
|
|
|
1104 */
|
|
|
1105 ())
|
|
|
1106 {
|
|
|
1107 int i;
|
|
|
1108 Lisp_Object list = Qnil;
|
|
|
1109
|
|
|
1110 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1111 list = Fcons (coding_category_symbol[i], list);
|
|
|
1112 return list;
|
|
|
1113 }
|
|
|
1114
|
|
|
1115 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1116 Change the priority order of the coding categories.
|
|
|
1117 LIST should be list of coding categories, in descending order of
|
|
|
1118 priority. Unspecified coding categories will be lower in priority
|
|
|
1119 than all specified ones, in the same relative order they were in
|
|
|
1120 previously.
|
|
|
1121 */
|
|
|
1122 (list))
|
|
|
1123 {
|
|
|
1124 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1125 int i, j;
|
|
|
1126 Lisp_Object rest;
|
|
|
1127
|
|
|
1128 /* First generate a list that maps coding categories to priorities. */
|
|
|
1129
|
|
|
1130 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1131 category_to_priority[i] = -1;
|
|
|
1132
|
|
|
1133 /* Highest priority comes from the specified list. */
|
|
|
1134 i = 0;
|
|
|
1135 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1136 {
|
|
|
1137 int cat = decode_coding_category (XCAR (rest));
|
|
|
1138
|
|
|
1139 if (category_to_priority[cat] >= 0)
|
|
|
1140 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1141 category_to_priority[cat] = i++;
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 /* Now go through the existing categories by priority to retrieve
|
|
|
1145 the categories not yet specified and preserve their priority
|
|
|
1146 order. */
|
|
|
1147 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1148 {
|
|
|
1149 int cat = coding_category_by_priority[j];
|
|
|
1150 if (category_to_priority[cat] < 0)
|
|
|
1151 category_to_priority[cat] = i++;
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 /* Now we need to construct the inverse of the mapping we just
|
|
|
1155 constructed. */
|
|
|
1156
|
|
|
1157 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1158 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
1159
|
|
|
1160 /* Phew! That was confusing. */
|
|
|
1161 return Qnil;
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1165 Return a list of coding categories in descending order of priority.
|
|
|
1166 */
|
|
|
1167 ())
|
|
|
1168 {
|
|
|
1169 int i;
|
|
|
1170 Lisp_Object list = Qnil;
|
|
|
1171
|
|
|
1172 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1173 list = Fcons (coding_category_symbol[coding_category_by_priority[i]],
|
|
|
1174 list);
|
|
|
1175 return list;
|
|
|
1176 }
|
|
|
1177
|
|
|
1178 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1179 Change the coding system associated with a coding category.
|
|
|
1180 */
|
|
|
1181 (coding_category, coding_system))
|
|
|
1182 {
|
|
|
1183 int cat = decode_coding_category (coding_category);
|
|
|
1184
|
|
|
1185 coding_system = Fget_coding_system (coding_system);
|
|
|
1186 coding_category_system[cat] = coding_system;
|
|
|
1187 return Qnil;
|
|
|
1188 }
|
|
|
1189
|
|
|
1190 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1191 Return the coding system associated with a coding category.
|
|
|
1192 */
|
|
|
1193 (coding_category))
|
|
|
1194 {
|
|
|
1195 int cat = decode_coding_category (coding_category);
|
|
|
1196 Lisp_Object sys = coding_category_system[cat];
|
|
|
1197
|
|
|
1198 if (!NILP (sys))
|
|
|
1199 return XCODING_SYSTEM_NAME (sys);
|
|
|
1200 return Qnil;
|
|
|
1201 }
|
|
|
1202
|
|
|
1203
|
|
|
1204 /************************************************************************/
|
|
|
1205 /* Detecting the encoding of data */
|
|
|
1206 /************************************************************************/
|
|
|
1207
|
|
|
1208 struct detection_state
|
|
|
1209 {
|
|
|
1210 int eol_type;
|
|
|
1211 int seen_non_ascii;
|
|
|
1212 int mask;
|
|
|
1213
|
|
|
1214 struct
|
|
|
1215 {
|
|
|
1216 int mask;
|
|
|
1217 int in_second_byte;
|
|
|
1218 }
|
|
|
1219 big5;
|
|
|
1220
|
|
|
1221 struct
|
|
|
1222 {
|
|
|
1223 int mask;
|
|
|
1224 int in_second_byte;
|
|
|
1225 }
|
|
|
1226 shift_jis;
|
|
|
1227
|
|
|
1228 struct
|
|
|
1229 {
|
|
|
1230 int mask;
|
|
|
1231 int initted;
|
|
|
1232 struct iso2022_decoder iso;
|
|
|
1233 unsigned int flags;
|
|
|
1234 int high_byte_count;
|
|
|
1235 int saw_single_shift:1;
|
|
|
1236 }
|
|
|
1237 iso2022;
|
|
|
1238
|
|
|
1239 struct
|
|
|
1240 {
|
|
|
1241 int seen_anything;
|
|
|
1242 int just_saw_cr;
|
|
|
1243 }
|
|
|
1244 eol;
|
|
|
1245 };
|
|
|
1246
|
|
|
1247 static int
|
|
|
1248 acceptable_control_char_p (int c)
|
|
|
1249 {
|
|
|
1250 switch (c)
|
|
|
1251 {
|
|
|
1252 /* Allow and ignore control characters that you might
|
|
|
1253 reasonably see in a text file */
|
|
|
1254 case '\r':
|
|
|
1255 case '\n':
|
|
|
1256 case '\t':
|
|
|
1257 case 7: /* bell */
|
|
|
1258 case 8: /* backspace */
|
|
|
1259 case 11: /* vertical tab */
|
|
|
1260 case 12: /* form feed */
|
|
|
1261 case 26: /* MS-DOS C-z junk */
|
|
|
1262 return 1;
|
|
|
1263 default:
|
|
|
1264 return 0;
|
|
|
1265 }
|
|
|
1266 }
|
|
|
1267
|
|
|
1268 static int
|
|
|
1269 mask_has_at_most_one_bit_p (int mask)
|
|
|
1270 {
|
|
|
1271 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1272 technical interviews */
|
|
|
1273 return (mask & (mask - 1)) == 0;
|
|
|
1274 }
|
|
|
1275
|
|
|
1276 static int
|
|
|
1277 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1278 unsigned int n)
|
|
|
1279 {
|
|
|
1280 int c;
|
|
|
1281
|
|
|
1282 while (n--)
|
|
|
1283 {
|
|
|
1284 c = *src++;
|
|
|
1285 if (c == '\r')
|
|
|
1286 st->eol.just_saw_cr = 1;
|
|
|
1287 else
|
|
|
1288 {
|
|
|
1289 if (c == '\n')
|
|
|
1290 {
|
|
|
1291 if (st->eol.just_saw_cr)
|
|
|
1292 return EOL_CRLF;
|
|
|
1293 else if (st->eol.seen_anything)
|
|
|
1294 return EOL_LF;
|
|
|
1295 }
|
|
|
1296 else if (st->eol.just_saw_cr)
|
|
|
1297 return EOL_CR;
|
|
|
1298 st->eol.just_saw_cr = 0;
|
|
|
1299 }
|
|
|
1300 st->eol.seen_anything = 1;
|
|
|
1301 }
|
|
|
1302
|
|
|
1303 return EOL_AUTODETECT;
|
|
|
1304 }
|
|
|
1305
|
|
|
1306 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1307 Before calling this function for the first type, you must initialize
|
|
|
1308 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1309
|
|
|
1310 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1311 not yet known.
|
|
|
1312
|
|
|
1313 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1314 ASCII has been seen so far.
|
|
|
1315
|
|
|
1316 Returns:
|
|
|
1317
|
|
|
1318 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1319 is present in st->mask
|
|
|
1320 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1321 */
|
|
|
1322
|
|
|
1323 static int
|
|
|
1324 detect_coding_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1325 unsigned int n, int just_do_eol)
|
|
|
1326 {
|
|
|
1327 int c;
|
|
|
1328
|
|
|
1329 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1330 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1331
|
|
|
1332 if (just_do_eol)
|
|
|
1333 return st->eol_type != EOL_AUTODETECT;
|
|
|
1334
|
|
|
1335 if (!st->seen_non_ascii)
|
|
|
1336 {
|
|
|
1337 for (; n; n--, src++)
|
|
|
1338 {
|
|
|
1339 c = *src;
|
|
|
1340 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1341 {
|
|
|
1342 st->seen_non_ascii = 1;
|
|
|
1343 st->shift_jis.mask = ~0;
|
|
|
1344 st->big5.mask = ~0;
|
|
|
1345 st->iso2022.mask = ~0;
|
|
|
1346 break;
|
|
|
1347 }
|
|
|
1348 }
|
|
|
1349 }
|
|
|
1350
|
|
|
1351 if (!n)
|
|
|
1352 return 0;
|
|
|
1353
|
|
|
1354 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1355 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1356 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
|
1357 st->shift_jis.mask = detect_coding_shift_jis (st, src, n);
|
|
|
1358 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1359 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
|
1360
|
|
|
1361 st->mask = st->iso2022.mask | st->shift_jis.mask | st->big5.mask;
|
|
|
1362
|
|
|
1363 {
|
|
|
1364 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1365 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1366 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1367 }
|
|
|
1368 }
|
|
|
1369
|
|
|
1370 static Lisp_Object
|
|
|
1371 coding_system_from_mask (int mask)
|
|
|
1372 {
|
|
|
1373 if (mask == ~0)
|
|
|
1374 {
|
|
|
1375 /* If the file was entirely or basically ASCII, use the
|
|
|
1376 default value of `file-coding-system'. */
|
|
|
1377 Lisp_Object retval =
|
|
|
1378 XBUFFER (Vbuffer_defaults)->file_coding_system;
|
|
|
1379 if (!NILP (retval))
|
|
|
1380 {
|
|
|
1381 retval = Ffind_coding_system (retval);
|
|
|
1382 if (NILP (retval))
|
|
|
1383 {
|
|
|
1384 warn_when_safe
|
|
|
1385 (Qbad_variable, Qwarning,
|
|
|
1386 "Invalid `default-file-coding-system', set to nil");
|
|
|
1387 XBUFFER (Vbuffer_defaults)->file_coding_system = Qnil;
|
|
|
1388 }
|
|
|
1389 }
|
|
|
1390 if (NILP (retval))
|
|
|
1391 retval = Fget_coding_system (Qno_conversion);
|
|
|
1392 return retval;
|
|
|
1393 }
|
|
|
1394 else
|
|
|
1395 {
|
|
|
1396 int i;
|
|
|
1397 int cat = -1;
|
|
|
1398
|
|
|
1399 mask = postprocess_iso2022_mask (mask);
|
|
|
1400
|
|
|
1401 /* Look through the coding categories by priority and find
|
|
|
1402 the first one that is allowed. */
|
|
|
1403 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1404 {
|
|
|
1405 cat = coding_category_by_priority[i];
|
|
|
1406 if ((mask & (1 << cat)) &&
|
|
|
1407 !NILP (coding_category_system[cat]))
|
|
|
1408 break;
|
|
|
1409 }
|
|
|
1410 if (cat >= 0)
|
|
|
1411 return coding_category_system[cat];
|
|
|
1412 else
|
|
|
1413 return Fget_coding_system (Qno_conversion);
|
|
|
1414 }
|
|
|
1415 }
|
|
|
1416
|
|
|
1417 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1418 as specified, do any autodetection that is called for. If the
|
|
|
1419 coding system and/or EOL type are not autodetect, they will be left
|
|
|
1420 alone; but this function will never return an autodetect coding system
|
|
|
1421 or EOL type.
|
|
|
1422
|
|
|
1423 This function does not automatically fetch subsidiary coding systems;
|
|
|
1424 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1425
|
|
|
1426 static void
|
|
|
1427 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
|
1428 int *eol_type_in_out)
|
|
|
1429 {
|
|
|
1430 struct detection_state decst;
|
|
|
1431
|
|
|
1432 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1433 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1434
|
|
|
1435 memset (&decst, 0, sizeof (decst));
|
|
|
1436 decst.eol_type = *eol_type_in_out;
|
|
|
1437 decst.mask = ~0;
|
|
|
1438
|
|
|
1439 /* If autodetection is called for, do it now. */
|
|
|
1440 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT ||
|
|
|
1441 *eol_type_in_out == EOL_AUTODETECT)
|
|
|
1442 {
|
|
|
1443
|
|
|
1444 while (1)
|
|
|
1445 {
|
|
|
1446 unsigned char random_buffer[4096];
|
|
|
1447 int nread;
|
|
|
1448
|
|
|
1449 nread = Lstream_read (stream, random_buffer, sizeof (random_buffer));
|
|
|
1450 if (!nread)
|
|
|
1451 break;
|
|
|
1452 if (detect_coding_type (&decst, random_buffer, nread,
|
|
|
1453 XCODING_SYSTEM_TYPE (*codesys_in_out) !=
|
|
|
1454 CODESYS_AUTODETECT))
|
|
|
1455 break;
|
|
|
1456 }
|
|
|
1457
|
|
|
1458 *eol_type_in_out = decst.eol_type;
|
|
|
1459 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
|
1460 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1461 }
|
|
|
1462
|
|
|
1463 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1464 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1465 *eol_type_in_out = EOL_LF;
|
|
|
1466
|
|
|
1467 Lstream_rewind (stream);
|
|
|
1468 }
|
|
|
1469
|
|
|
1470 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1471 Detect coding system of the text in the region between START and END.
|
|
|
1472 Returned value is a list of possible coding systems ordered by priority.
|
|
|
1473 If only ASCII characters are found, it returns 'autodetect or one of its
|
|
|
1474 subsidiary coding systems according to a detected end-of-line type.
|
|
|
1475 Optional arg BUFFER defaults to the current buffer.
|
|
|
1476 */
|
|
|
1477 (start, end, buffer))
|
|
|
1478 {
|
|
|
1479 Lisp_Object val = Qnil;
|
|
|
1480 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1481 Bufpos b, e;
|
|
|
1482 Lisp_Object instream;
|
|
|
1483 struct detection_state decst;
|
|
|
1484
|
|
|
1485 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1486 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1487 instream = make_encoding_input_stream (XLSTREAM (instream),
|
|
|
1488 Fget_coding_system (Qbinary));
|
|
|
1489 memset (&decst, 0, sizeof (decst));
|
|
|
1490 decst.eol_type = EOL_AUTODETECT;
|
|
|
1491 decst.mask = ~0;
|
|
|
1492 while (1)
|
|
|
1493 {
|
|
|
1494 unsigned char random_buffer[4096];
|
|
|
1495 int nread;
|
|
|
1496
|
|
|
1497 nread = Lstream_read (XLSTREAM (instream), random_buffer,
|
|
|
1498 sizeof (random_buffer));
|
|
|
1499 if (!nread)
|
|
|
1500 break;
|
|
|
1501 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1502 break;
|
|
|
1503 }
|
|
|
1504
|
|
|
1505 if (decst.mask == ~0)
|
|
|
1506 {
|
|
|
1507 val = subsidiary_coding_system (Fget_coding_system (Qautodetect),
|
|
|
1508 decst.eol_type);
|
|
|
1509 }
|
|
|
1510 else
|
|
|
1511 {
|
|
|
1512 int i;
|
|
|
1513
|
|
|
1514 val = Qnil;
|
|
|
1515
|
|
|
1516 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
|
1517
|
|
|
1518 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1519 {
|
|
|
1520 int sys = coding_category_by_priority[i];
|
|
|
1521 if (decst.mask & (1 << sys))
|
|
|
1522 {
|
|
|
1523 Lisp_Object codesys = coding_category_system[sys];
|
|
|
1524 if (!NILP (codesys))
|
|
|
1525 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1526 val = Fcons (codesys, val);
|
|
|
1527 }
|
|
|
1528 }
|
|
|
1529 }
|
|
|
1530 return val;
|
|
|
1531 }
|
|
|
1532
|
|
|
1533
|
|
|
1534 /************************************************************************/
|
|
|
1535 /* Converting to internal Mule format ("decoding") */
|
|
|
1536 /************************************************************************/
|
|
|
1537
|
|
|
1538 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1539 converting from some external format to internal format).
|
|
|
1540 The decoding-stream object keeps track of the actual coding
|
|
|
1541 stream, the stream that is at the other end, and data that
|
|
|
1542 needs to be persistent across the lifetime of the stream. */
|
|
|
1543
|
|
|
1544 /* Handle the EOL stuff related to just-read-in character C. EOL is
|
|
|
1545 the EOL type of the coding stream. FLAGS is the current value of
|
|
|
1546 FLAGS in the coding stream, and may be modified by this macro.
|
|
|
1547 (The macro only looks at the CODING_STATE_CR flag.) DST is the
|
|
|
1548 Dynarr to which the decoded bytes are to be written. You need to
|
|
|
1549 also define a local goto label "label_continue_loop" that is at the
|
|
|
1550 end of the main character-reading loop.
|
|
|
1551
|
|
|
1552 If C is a CR character, then this macro handles it entirely and
|
|
|
1553 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
1554 anything to DST, and continues normally. You should continue
|
|
|
1555 processing C normally after this macro. */
|
|
|
1556
|
|
|
1557 #define DECODE_HANDLE_EOL_TYPE(eol, c, flags, dst) \
|
|
|
1558 do { \
|
|
|
1559 if (c == '\r') \
|
|
|
1560 { \
|
|
|
1561 if (eol == EOL_CR) \
|
|
|
1562 Dynarr_add (dst, '\n'); \
|
|
|
1563 else if (eol != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
|
1564 Dynarr_add (dst, c); \
|
|
|
1565 else \
|
|
|
1566 flags |= CODING_STATE_CR; \
|
|
|
1567 goto label_continue_loop; \
|
|
|
1568 } \
|
|
|
1569 else if (flags & CODING_STATE_CR) \
|
|
|
1570 { /* eol == CODING_SYSTEM_EOL_CRLF */ \
|
|
|
1571 if (c != '\n') \
|
|
|
1572 Dynarr_add (dst, '\r'); \
|
|
|
1573 flags &= ~CODING_STATE_CR; \
|
|
|
1574 } \
|
|
|
1575 } while (0)
|
|
|
1576
|
|
|
1577 /* C should be a binary character in the range 0 - 255; convert
|
|
|
1578 to internal format and add to Dynarr DST. */
|
|
|
1579
|
|
|
1580 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
1581 do { \
|
|
|
1582 if (BYTE_ASCII_P (c)) \
|
|
|
1583 Dynarr_add (dst, c); \
|
|
|
1584 else if (BYTE_C1_P (c)) \
|
|
|
1585 { \
|
|
|
1586 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
1587 Dynarr_add (dst, c + 0x20); \
|
|
|
1588 } \
|
|
|
1589 else \
|
|
|
1590 { \
|
|
|
1591 Dynarr_add (dst, LEADING_BYTE_LATIN_1); \
|
|
|
1592 Dynarr_add (dst, c); \
|
|
|
1593 } \
|
|
|
1594 } while (0)
|
|
|
1595
|
|
|
1596 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
1597 do { \
|
|
|
1598 if (ch) \
|
|
|
1599 { \
|
|
|
1600 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
1601 ch = 0; \
|
|
|
1602 } \
|
|
|
1603 } while (0)
|
|
|
1604
|
|
|
1605 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst)\
|
|
|
1606 do { \
|
|
|
1607 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
1608 if (flags & CODING_STATE_END) \
|
|
|
1609 { \
|
|
|
1610 if (flags & CODING_STATE_CR) \
|
|
|
1611 Dynarr_add (dst, '\r'); \
|
|
|
1612 } \
|
|
|
1613 } while (0)
|
|
|
1614
|
|
|
1615 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
1616
|
|
|
1617 struct decoding_stream
|
|
|
1618 {
|
|
|
1619 /* Coding system that governs the conversion. */
|
|
|
1620 struct Lisp_Coding_System *codesys;
|
|
|
1621
|
|
|
1622 /* Stream that we read the encoded data from or
|
|
|
1623 write the decoded data to. */
|
|
|
1624 Lstream *other_end;
|
|
|
1625
|
|
|
1626 /* If we are reading, then we can return only a fixed amount of
|
|
|
1627 data, so if the conversion resulted in too much data, we store it
|
|
|
1628 here for retrieval the next time around. */
|
|
|
1629 unsigned_char_dynarr *runoff;
|
|
|
1630
|
|
|
1631 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
1632 Some of these flags are dependent on the coding system. */
|
|
|
1633 unsigned int flags;
|
|
|
1634
|
|
|
1635 /* CH holds a partially built-up character. Since we only deal
|
|
|
1636 with one- and two-byte characters at the moment, we only use
|
|
|
1637 this to store the first byte of a two-byte character. */
|
|
|
1638 unsigned int ch;
|
|
|
1639
|
|
|
1640 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
1641 currently applies. We need to keep this separate from the
|
|
|
1642 EOL type stored in CODESYS because the latter might indicate
|
|
|
1643 automatic EOL-type detection while the former will always
|
|
|
1644 indicate a particular EOL type. */
|
|
|
1645 int eol_type;
|
|
|
1646
|
|
|
1647 /* Additional ISO2022 information. We define the structure above
|
|
|
1648 because it's also needed by the detection routines. */
|
|
|
1649 struct iso2022_decoder iso2022;
|
|
|
1650
|
|
|
1651 /* Additional information (the state of the running CCL program)
|
|
|
1652 used by the CCL decoder. */
|
|
|
1653 struct ccl_program ccl;
|
|
|
1654
|
|
|
1655 struct detection_state decst;
|
|
|
1656 };
|
|
|
1657
|
|
|
1658 static int decoding_reader (Lstream *stream, unsigned char *data, int size);
|
|
|
1659 static int decoding_writer (Lstream *stream, CONST unsigned char *data, int size);
|
|
|
1660 static int decoding_rewinder (Lstream *stream);
|
|
|
1661 static int decoding_seekable_p (Lstream *stream);
|
|
|
1662 static int decoding_flusher (Lstream *stream);
|
|
|
1663 static int decoding_closer (Lstream *stream);
|
|
|
1664 static Lisp_Object decoding_marker (Lisp_Object stream,
|
|
|
1665 void (*markobj) (Lisp_Object));
|
|
|
1666
|
|
|
1667 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
1668 sizeof (struct decoding_stream));
|
|
|
1669
|
|
|
1670 static Lisp_Object
|
|
|
1671 decoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
1672 {
|
|
|
1673 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
1674 Lisp_Object str_obj;
|
|
|
1675
|
|
|
1676 /* We do not need to mark the coding systems or charsets stored
|
|
|
1677 within the stream because they are stored in a global list
|
|
|
1678 and automatically marked. */
|
|
|
1679
|
|
|
1680 XSETLSTREAM (str_obj, str);
|
|
|
1681 (markobj) (str_obj);
|
|
|
1682 if (str->imp->marker)
|
|
|
1683 return (str->imp->marker) (str_obj, markobj);
|
|
|
1684 else
|
|
|
1685 return Qnil;
|
|
|
1686 }
|
|
|
1687
|
|
|
1688 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
1689 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
1690
|
|
|
1691 static int
|
|
|
1692 decoding_reader (Lstream *stream, unsigned char *data, int size)
|
|
|
1693 {
|
|
|
1694 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1695 unsigned char *orig_data = data;
|
|
|
1696 int read_size;
|
|
|
1697 int error_occurred = 0;
|
|
|
1698
|
|
|
1699 /* We need to interface to mule_decode(), which expects to take some
|
|
|
1700 amount of data and store the result into a Dynarr. We have
|
|
|
1701 mule_decode() store into str->runoff, and take data from there
|
|
|
1702 as necessary. */
|
|
|
1703
|
|
|
1704 /* We loop until we have enough data, reading chunks from the other
|
|
|
1705 end and decoding it. */
|
|
|
1706 while (1)
|
|
|
1707 {
|
|
|
1708 /* Take data from the runoff if we can. Make sure to take at
|
|
|
1709 most SIZE bytes, and delete the data from the runoff. */
|
|
|
1710 if (Dynarr_length (str->runoff) > 0)
|
|
|
1711 {
|
|
|
1712 int chunk = min (size, Dynarr_length (str->runoff));
|
|
|
1713 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
1714 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
1715 data += chunk;
|
|
|
1716 size -= chunk;
|
|
|
1717 }
|
|
|
1718
|
|
|
1719 if (size == 0)
|
|
|
1720 break; /* No more room for data */
|
|
|
1721
|
|
|
1722 if (str->flags & CODING_STATE_END)
|
|
|
1723 /* This means that on the previous iteration, we hit the EOF on
|
|
|
1724 the other end. We loop once more so that mule_decode() can
|
|
|
1725 output any final stuff it may be holding, or any "go back
|
|
|
1726 to a sane state" escape sequences. (This latter makes sense
|
|
|
1727 during encoding.) */
|
|
|
1728 break;
|
|
|
1729
|
|
|
1730 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
1731 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
1732 into it. (We'll be overwriting above, after we've decoded it
|
|
|
1733 into the runoff.) */
|
|
|
1734 read_size = Lstream_read (str->other_end, data, size);
|
|
|
1735 if (read_size < 0)
|
|
|
1736 {
|
|
|
1737 error_occurred = 1;
|
|
|
1738 break;
|
|
|
1739 }
|
|
|
1740 if (read_size == 0)
|
|
|
1741 /* There might be some more end data produced in the translation.
|
|
|
1742 See the comment above. */
|
|
|
1743 str->flags |= CODING_STATE_END;
|
|
|
1744 mule_decode (stream, data, str->runoff, read_size);
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 if (data - orig_data == 0)
|
|
|
1748 return error_occurred ? -1 : 0;
|
|
|
1749 else
|
|
|
1750 return data - orig_data;
|
|
|
1751 }
|
|
|
1752
|
|
|
1753 static int
|
|
|
1754 decoding_writer (Lstream *stream, CONST unsigned char *data, int size)
|
|
|
1755 {
|
|
|
1756 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1757 int retval;
|
|
|
1758
|
|
|
1759 /* Decode all our data into the runoff, and then attempt to write
|
|
|
1760 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
1761 in writing. */
|
|
|
1762 mule_decode (stream, data, str->runoff, size);
|
|
|
1763 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
1764 Dynarr_length (str->runoff));
|
|
|
1765 if (retval > 0)
|
|
|
1766 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
1767 /* Do NOT return retval. The return value indicates how much
|
|
|
1768 of the incoming data was written, not how many bytes were
|
|
|
1769 written. */
|
|
|
1770 return size;
|
|
|
1771 }
|
|
|
1772
|
|
|
1773 static void
|
|
|
1774 reset_decoding_stream (struct decoding_stream *str)
|
|
|
1775 {
|
|
|
1776 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
1777 {
|
|
|
1778 Lisp_Object coding_system = Qnil;
|
|
|
1779 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1780 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
1781 }
|
|
|
1782 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
1783 {
|
|
|
1784 set_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys),
|
|
|
1785 0, 0, 0);
|
|
|
1786 }
|
|
|
1787
|
|
|
1788 str->flags = str->ch = 0;
|
|
|
1789 }
|
|
|
1790
|
|
|
1791 static int
|
|
|
1792 decoding_rewinder (Lstream *stream)
|
|
|
1793 {
|
|
|
1794 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1795 reset_decoding_stream (str);
|
|
|
1796 Dynarr_reset (str->runoff);
|
|
|
1797 return Lstream_rewind (str->other_end);
|
|
|
1798 }
|
|
|
1799
|
|
|
1800 static int
|
|
|
1801 decoding_seekable_p (Lstream *stream)
|
|
|
1802 {
|
|
|
1803 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1804 return Lstream_seekable_p (str->other_end);
|
|
|
1805 }
|
|
|
1806
|
|
|
1807 static int
|
|
|
1808 decoding_flusher (Lstream *stream)
|
|
|
1809 {
|
|
|
1810 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1811 return Lstream_flush (str->other_end);
|
|
|
1812 }
|
|
|
1813
|
|
|
1814 static int
|
|
|
1815 decoding_closer (Lstream *stream)
|
|
|
1816 {
|
|
|
1817 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1818 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
1819 {
|
|
|
1820 str->flags |= CODING_STATE_END;
|
|
|
1821 decoding_writer (stream, 0, 0);
|
|
|
1822 }
|
|
|
1823 Dynarr_free (str->runoff);
|
|
|
1824 if (str->iso2022.composite_chars)
|
|
|
1825 Dynarr_free (str->iso2022.composite_chars);
|
|
|
1826 return Lstream_close (str->other_end);
|
|
|
1827 }
|
|
|
1828
|
|
|
1829 Lisp_Object
|
|
|
1830 decoding_stream_coding_system (Lstream *stream)
|
|
|
1831 {
|
|
|
1832 Lisp_Object coding_system = Qnil;
|
|
|
1833 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1834
|
|
|
1835 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1836 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
1837 }
|
|
|
1838
|
|
|
1839 void
|
|
|
1840 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
1841 {
|
|
|
1842 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
1843 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1844 str->codesys = cs;
|
|
|
1845 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1846 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
1847 reset_decoding_stream (str);
|
|
|
1848 }
|
|
|
1849
|
|
|
1850 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
1851 stream for writing, no automatic code detection will be performed.
|
|
|
1852 The reason for this is that automatic code detection requires a
|
|
|
1853 seekable input. Things will also fail if you open a decoding
|
|
|
1854 stream for reading using a non-fully-specified coding system and
|
|
|
1855 a non-seekable input stream. */
|
|
|
1856
|
|
|
1857 static Lisp_Object
|
|
|
1858 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
1859 CONST char *mode)
|
|
|
1860 {
|
|
|
1861 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
1862 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1863 Lisp_Object obj;
|
|
|
1864
|
|
|
1865 memset (str, 0, sizeof (*str));
|
|
|
1866 str->other_end = stream;
|
|
|
1867 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned char);
|
|
|
1868 str->eol_type = EOL_AUTODETECT;
|
|
|
1869 if (!strcmp (mode, "r")
|
|
|
1870 && Lstream_seekable_p (stream))
|
|
|
1871 /* We can determine the coding system now. */
|
|
|
1872 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
1873 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
1874 str->decst.eol_type = str->eol_type;
|
|
|
1875 str->decst.mask = ~0;
|
|
|
1876 XSETLSTREAM (obj, lstr);
|
|
|
1877 return obj;
|
|
|
1878 }
|
|
|
1879
|
|
|
1880 Lisp_Object
|
|
|
1881 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1882 {
|
|
|
1883 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
1884 }
|
|
|
1885
|
|
|
1886 Lisp_Object
|
|
|
1887 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1888 {
|
|
|
1889 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
1890 }
|
|
|
1891
|
|
|
1892 /* Note: the decode_coding_? functions all take the same
|
|
|
1893 arguments as mule_decode(), which is to say some SRC data of
|
|
|
1894 size N, which is to be stored into dynamic array DST.
|
|
|
1895 DECODING is the stream within which the decoding is
|
|
|
1896 taking place, but no data is actually read from or
|
|
|
1897 written to that stream; that is handled in decoding_reader()
|
|
|
1898 or decoding_writer(). This allows the same functions to
|
|
|
1899 be used for both reading and writing. */
|
|
|
1900
|
|
|
1901 static void
|
|
|
1902 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
|
1903 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
1904 {
|
|
|
1905 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
1906
|
|
|
1907 /* If necessary, do encoding-detection now. We do this when
|
|
|
1908 we're a writing stream or a non-seekable reading stream,
|
|
|
1909 meaning that we can't just process the whole input,
|
|
|
1910 rewind, and start over. */
|
|
|
1911
|
|
|
1912 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
1913 str->eol_type == EOL_AUTODETECT)
|
|
|
1914 {
|
|
|
1915 Lisp_Object codesys = Qnil;
|
|
|
1916
|
|
|
1917 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
1918 detect_coding_type (&str->decst, src, n,
|
|
|
1919 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
1920 CODESYS_AUTODETECT);
|
|
|
1921 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
1922 str->decst.mask != ~0)
|
|
|
1923 /* #### This is cheesy. What we really ought to do is
|
|
|
1924 buffer up a certain amount of data so as to get a
|
|
|
1925 less random result. */
|
|
|
1926 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
1927 str->eol_type = str->decst.eol_type;
|
|
|
1928 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
1929 {
|
|
|
1930 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
1931 If we erase it, bad things might happen. */
|
|
|
1932 int was_end = str->flags & CODING_STATE_END;
|
|
|
1933 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
1934 if (was_end)
|
|
|
1935 str->flags |= CODING_STATE_END;
|
|
|
1936 }
|
|
|
1937 }
|
|
|
1938
|
|
|
1939 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
1940 {
|
|
|
1941 #ifdef DEBUG_XEMACS
|
|
|
1942 case CODESYS_INTERNAL:
|
|
|
1943 Dynarr_add_many (dst, src, n);
|
|
|
1944 break;
|
|
|
1945 #endif
|
|
|
1946 case CODESYS_AUTODETECT:
|
|
|
1947 /* If we got this far and still haven't decided on the coding
|
|
|
1948 system, then do no conversion. */
|
|
|
1949 case CODESYS_NO_CONVERSION:
|
|
|
1950 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
1951 break;
|
|
|
1952 case CODESYS_SHIFT_JIS:
|
|
|
1953 decode_coding_shift_jis (decoding, src, dst, n);
|
|
|
1954 break;
|
|
|
1955 case CODESYS_BIG5:
|
|
|
1956 decode_coding_big5 (decoding, src, dst, n);
|
|
|
1957 break;
|
|
|
1958 case CODESYS_CCL:
|
|
|
1959 ccl_driver (&str->ccl, src, dst, n, (str->flags) & CODING_STATE_END);
|
|
|
1960 break;
|
|
|
1961 case CODESYS_ISO2022:
|
|
|
1962 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
1963 break;
|
|
|
1964 default:
|
|
|
1965 abort ();
|
|
|
1966 }
|
|
|
1967 }
|
|
|
1968
|
|
|
1969 static Lisp_Object
|
|
|
1970 close_both_streams (Lisp_Object cons)
|
|
|
1971 {
|
|
|
1972 Lisp_Object instream = XCAR (cons);
|
|
|
1973 Lisp_Object outstream = XCDR (cons);
|
|
|
1974 Lstream_close (XLSTREAM (outstream));
|
|
|
1975 Lstream_close (XLSTREAM (instream));
|
|
|
1976 return Qnil;
|
|
|
1977 }
|
|
|
1978
|
|
|
1979 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
1980 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
1981 This is useful if you've read in encoded text from a file without decoding
|
|
|
1982 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
1983 `no-conversion' coding system, so that it shows up as \"^[$B!<!+^[(B\").
|
|
|
1984 Return length of decoded text.
|
|
|
1985 BUFFER defaults to the current buffer if unspecified.
|
|
|
1986 */
|
|
|
1987 (start, end, coding_system, buffer))
|
|
|
1988 {
|
|
|
1989 Bufpos b, e;
|
|
|
1990 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1991 Lisp_Object instream, outstream;
|
|
|
1992 int speccount = specpdl_depth ();
|
|
|
1993 struct gcpro gcpro1, gcpro2;
|
|
|
1994
|
|
|
1995 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1996 coding_system = Fget_coding_system (coding_system);
|
|
|
1997 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1998 outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
1999 outstream = make_decoding_output_stream (XLSTREAM (outstream),
|
|
|
2000 coding_system);
|
|
|
2001 outstream = make_encoding_output_stream (XLSTREAM (outstream),
|
|
|
2002 Fget_coding_system (Qbinary));
|
|
|
2003 GCPRO2 (instream, outstream);
|
|
|
2004 record_unwind_protect (close_both_streams, Fcons (instream, outstream));
|
|
|
2005
|
|
|
2006 /* The chain of streams looks like this:
|
|
|
2007
|
|
|
2008 [BUFFER] <----- send through
|
|
|
2009 ------> [ENCODE AS BINARY]
|
|
|
2010 ------> [DECODE AS SPECIFIED]
|
|
|
2011 ------> [BUFFER]
|
|
|
2012 */
|
|
|
2013
|
|
|
2014 {
|
|
|
2015 char tempbuf[1024]; /* some random amount */
|
|
|
2016 Lstream *in = XLSTREAM(instream);
|
|
|
2017 Lstream *out = XLSTREAM(outstream);
|
|
|
2018 Bufpos newpos, even_newer_pos;
|
|
|
2019
|
|
|
2020 while (1)
|
|
|
2021 {
|
|
|
2022 Bufpos oldpos = lisp_buffer_stream_startpos (in);
|
|
|
2023 int size_in_bytes = Lstream_read (in, tempbuf, sizeof (tempbuf));
|
|
|
2024 if (!size_in_bytes)
|
|
|
2025 break;
|
|
|
2026 newpos = lisp_buffer_stream_startpos (in);
|
|
|
2027 Lstream_write (out, tempbuf, size_in_bytes);
|
|
|
2028 even_newer_pos = lisp_buffer_stream_startpos (in);
|
|
|
2029 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2030 even_newer_pos, 0);
|
|
|
2031 }
|
|
|
2032 }
|
|
|
2033
|
|
|
2034 unbind_to (speccount, Qnil);
|
|
|
2035 UNGCPRO;
|
|
|
2036 return Qnil;
|
|
|
2037 }
|
|
|
2038
|
|
|
2039
|
|
|
2040 /************************************************************************/
|
|
|
2041 /* Converting to an external encoding ("encoding") */
|
|
|
2042 /************************************************************************/
|
|
|
2043
|
|
|
2044 /* An encoding stream is an output stream. When you create the
|
|
|
2045 stream, you specify the coding system that governs the encoding
|
|
|
2046 and another stream that the resulting encoded data is to be
|
|
|
2047 sent to, and then start sending data to it. */
|
|
|
2048
|
|
|
2049 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2050
|
|
|
2051 struct encoding_stream
|
|
|
2052 {
|
|
|
2053 /* Coding system that governs the conversion. */
|
|
|
2054 struct Lisp_Coding_System *codesys;
|
|
|
2055
|
|
|
2056 /* Stream that we read the encoded data from or
|
|
|
2057 write the decoded data to. */
|
|
|
2058 Lstream *other_end;
|
|
|
2059
|
|
|
2060 /* If we are reading, then we can return only a fixed amount of
|
|
|
2061 data, so if the conversion resulted in too much data, we store it
|
|
|
2062 here for retrieval the next time around. */
|
|
|
2063 unsigned_char_dynarr *runoff;
|
|
|
2064
|
|
|
2065 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2066 Some of these flags are dependent on the coding system. */
|
|
|
2067 unsigned int flags;
|
|
|
2068
|
|
|
2069 /* CH holds a partially built-up character. Since we only deal
|
|
|
2070 with one- and two-byte characters at the moment, we only use
|
|
|
2071 this to store the first byte of a two-byte character. */
|
|
|
2072 unsigned int ch;
|
|
|
2073
|
|
|
2074 /* Additional information used by the ISO2022 encoder. */
|
|
|
2075 struct
|
|
|
2076 {
|
|
|
2077 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2078 through G3 registers. It is initialized from the array
|
|
|
2079 INITIAL_CHARSET in CODESYS. */
|
|
|
2080 Lisp_Object charset[4];
|
|
|
2081
|
|
|
2082 /* Which registers are currently invoked into the left (GL) and
|
|
|
2083 right (GR) halves of the 8-bit encoding space? */
|
|
|
2084 int register_left, register_right;
|
|
|
2085
|
|
|
2086 /* Whether we need to explicitly designate the charset in the
|
|
|
2087 G? register before using it. It is initialized from the
|
|
|
2088 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2089 unsigned char force_charset_on_output[4];
|
|
|
2090
|
|
|
2091 /* Other state variables that need to be preserved across
|
|
|
2092 invocations. */
|
|
|
2093 Lisp_Object current_charset;
|
|
|
2094 int current_half;
|
|
|
2095 int current_char_boundary;
|
|
|
2096 } iso2022;
|
|
|
2097
|
|
|
2098 /* Additional information (the state of the running CCL program)
|
|
|
2099 used by the CCL encoder. */
|
|
|
2100 struct ccl_program ccl;
|
|
|
2101 };
|
|
|
2102
|
|
|
2103 static int encoding_reader (Lstream *stream, unsigned char *data, int size);
|
|
|
2104 static int encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
|
2105 int size);
|
|
|
2106 static int encoding_rewinder (Lstream *stream);
|
|
|
2107 static int encoding_seekable_p (Lstream *stream);
|
|
|
2108 static int encoding_flusher (Lstream *stream);
|
|
|
2109 static int encoding_closer (Lstream *stream);
|
|
|
2110 static Lisp_Object encoding_marker (Lisp_Object stream,
|
|
|
2111 void (*markobj) (Lisp_Object));
|
|
|
2112
|
|
|
2113 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2114 sizeof (struct encoding_stream));
|
|
|
2115
|
|
|
2116 static Lisp_Object
|
|
|
2117 encoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
2118 {
|
|
|
2119 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2120 Lisp_Object str_obj;
|
|
|
2121
|
|
|
2122 /* We do not need to mark the coding systems or charsets stored
|
|
|
2123 within the stream because they are stored in a global list
|
|
|
2124 and automatically marked. */
|
|
|
2125
|
|
|
2126 XSETLSTREAM (str_obj, str);
|
|
|
2127 (markobj) (str_obj);
|
|
|
2128 if (str->imp->marker)
|
|
|
2129 return (str->imp->marker) (str_obj, markobj);
|
|
|
2130 else
|
|
|
2131 return Qnil;
|
|
|
2132 }
|
|
|
2133
|
|
|
2134 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2135 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2136
|
|
|
2137 static int
|
|
|
2138 encoding_reader (Lstream *stream, unsigned char *data, int size)
|
|
|
2139 {
|
|
|
2140 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2141 unsigned char *orig_data = data;
|
|
|
2142 int read_size;
|
|
|
2143 int error_occurred = 0;
|
|
|
2144
|
|
|
2145 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2146 amount of data and store the result into a Dynarr. We have
|
|
|
2147 mule_encode() store into str->runoff, and take data from there
|
|
|
2148 as necessary. */
|
|
|
2149
|
|
|
2150 /* We loop until we have enough data, reading chunks from the other
|
|
|
2151 end and encoding it. */
|
|
|
2152 while (1)
|
|
|
2153 {
|
|
|
2154 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2155 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2156 if (Dynarr_length (str->runoff) > 0)
|
|
|
2157 {
|
|
|
2158 int chunk = min (size, Dynarr_length (str->runoff));
|
|
|
2159 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2160 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2161 data += chunk;
|
|
|
2162 size -= chunk;
|
|
|
2163 }
|
|
|
2164
|
|
|
2165 if (size == 0)
|
|
|
2166 break; /* No more room for data */
|
|
|
2167
|
|
|
2168 if (str->flags & CODING_STATE_END)
|
|
|
2169 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2170 the other end. We loop once more so that mule_encode() can
|
|
|
2171 output any final stuff it may be holding, or any "go back
|
|
|
2172 to a sane state" escape sequences. (This latter makes sense
|
|
|
2173 during encoding.) */
|
|
|
2174 break;
|
|
|
2175
|
|
|
2176 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2177 left of storage in it, so it's OK to read directly into it.
|
|
|
2178 (We'll be overwriting above, after we've encoded it into the
|
|
|
2179 runoff.) */
|
|
|
2180 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2181 if (read_size < 0)
|
|
|
2182 {
|
|
|
2183 error_occurred = 1;
|
|
|
2184 break;
|
|
|
2185 }
|
|
|
2186 if (read_size == 0)
|
|
|
2187 /* There might be some more end data produced in the translation.
|
|
|
2188 See the comment above. */
|
|
|
2189 str->flags |= CODING_STATE_END;
|
|
|
2190 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2191 }
|
|
|
2192
|
|
|
2193 if (data - orig_data == 0)
|
|
|
2194 return error_occurred ? -1 : 0;
|
|
|
2195 else
|
|
|
2196 return data - orig_data;
|
|
|
2197 }
|
|
|
2198
|
|
|
2199 static int
|
|
|
2200 encoding_writer (Lstream *stream, CONST unsigned char *data, int size)
|
|
|
2201 {
|
|
|
2202 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2203 int retval;
|
|
|
2204
|
|
|
2205 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2206 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2207 in writing. */
|
|
|
2208 mule_encode (stream, data, str->runoff, size);
|
|
|
2209 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2210 Dynarr_length (str->runoff));
|
|
|
2211 if (retval > 0)
|
|
|
2212 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2213 /* Do NOT return retval. The return value indicates how much
|
|
|
2214 of the incoming data was written, not how many bytes were
|
|
|
2215 written. */
|
|
|
2216 return size;
|
|
|
2217 }
|
|
|
2218
|
|
|
2219 static void
|
|
|
2220 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2221 {
|
|
|
2222 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
2223 {
|
|
|
2224 int i;
|
|
|
2225
|
|
|
2226 for (i = 0; i < 4; i++)
|
|
|
2227 str->iso2022.charset[i] =
|
|
|
2228 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2229 for (i = 0; i < 4; i++)
|
|
|
2230 str->iso2022.force_charset_on_output[i] =
|
|
|
2231 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2232 str->iso2022.register_left = 0;
|
|
|
2233 str->iso2022.register_right = 1;
|
|
|
2234 str->iso2022.current_charset = Qnil;
|
|
|
2235 str->iso2022.current_half = 0;
|
|
|
2236 str->iso2022.current_char_boundary = 1;
|
|
|
2237 }
|
|
|
2238 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
2239 {
|
|
|
2240 set_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys), 0, 0, 0);
|
|
|
2241 }
|
|
|
2242 str->flags = str->ch = 0;
|
|
|
2243 }
|
|
|
2244
|
|
|
2245 static int
|
|
|
2246 encoding_rewinder (Lstream *stream)
|
|
|
2247 {
|
|
|
2248 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2249 reset_encoding_stream (str);
|
|
|
2250 Dynarr_reset (str->runoff);
|
|
|
2251 return Lstream_rewind (str->other_end);
|
|
|
2252 }
|
|
|
2253
|
|
|
2254 static int
|
|
|
2255 encoding_seekable_p (Lstream *stream)
|
|
|
2256 {
|
|
|
2257 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2258 return Lstream_seekable_p (str->other_end);
|
|
|
2259 }
|
|
|
2260
|
|
|
2261 static int
|
|
|
2262 encoding_flusher (Lstream *stream)
|
|
|
2263 {
|
|
|
2264 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2265 return Lstream_flush (str->other_end);
|
|
|
2266 }
|
|
|
2267
|
|
|
2268 static int
|
|
|
2269 encoding_closer (Lstream *stream)
|
|
|
2270 {
|
|
|
2271 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2272 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2273 {
|
|
|
2274 str->flags |= CODING_STATE_END;
|
|
|
2275 encoding_writer (stream, 0, 0);
|
|
|
2276 }
|
|
|
2277 Dynarr_free (str->runoff);
|
|
|
2278 return Lstream_close (str->other_end);
|
|
|
2279 }
|
|
|
2280
|
|
|
2281 Lisp_Object
|
|
|
2282 encoding_stream_coding_system (Lstream *stream)
|
|
|
2283 {
|
|
|
2284 Lisp_Object coding_system = Qnil;
|
|
|
2285 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2286
|
|
|
2287 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2288 return coding_system;
|
|
|
2289 }
|
|
|
2290
|
|
|
2291 void
|
|
|
2292 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2293 {
|
|
|
2294 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2295 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2296 str->codesys = cs;
|
|
|
2297 reset_encoding_stream (str);
|
|
|
2298 }
|
|
|
2299
|
|
|
2300 static Lisp_Object
|
|
|
2301 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
2302 CONST char *mode)
|
|
|
2303 {
|
|
|
2304 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2305 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2306 Lisp_Object obj;
|
|
|
2307
|
|
|
2308 memset (str, 0, sizeof (*str));
|
|
|
2309 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned char);
|
|
|
2310 str->other_end = stream;
|
|
|
2311 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2312 XSETLSTREAM (obj, lstr);
|
|
|
2313 return obj;
|
|
|
2314 }
|
|
|
2315
|
|
|
2316 Lisp_Object
|
|
|
2317 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2318 {
|
|
|
2319 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2320 }
|
|
|
2321
|
|
|
2322 Lisp_Object
|
|
|
2323 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2324 {
|
|
|
2325 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2326 }
|
|
|
2327
|
|
|
2328 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2329 external format, according to the encoding stream ENCODING.
|
|
|
2330 Store the encoded data into DST. */
|
|
|
2331
|
|
|
2332 static void
|
|
|
2333 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
|
2334 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2335 {
|
|
|
2336 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2337
|
|
|
2338 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2339 {
|
|
|
2340 #ifdef DEBUG_XEMACS
|
|
|
2341 case CODESYS_INTERNAL:
|
|
|
2342 Dynarr_add_many (dst, src, n);
|
|
|
2343 break;
|
|
|
2344 #endif
|
|
|
2345 case CODESYS_AUTODETECT:
|
|
|
2346 /* If we got this far and still haven't decided on the coding
|
|
|
2347 system, then do no conversion. */
|
|
|
2348 case CODESYS_NO_CONVERSION:
|
|
|
2349 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2350 break;
|
|
|
2351 case CODESYS_SHIFT_JIS:
|
|
|
2352 encode_coding_shift_jis (encoding, src, dst, n);
|
|
|
2353 break;
|
|
|
2354 case CODESYS_BIG5:
|
|
|
2355 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2356 break;
|
|
|
2357 case CODESYS_CCL:
|
|
|
2358 ccl_driver (&str->ccl, src, dst, n, (str->flags) & CODING_STATE_END);
|
|
|
2359 break;
|
|
|
2360 case CODESYS_ISO2022:
|
|
|
2361 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2362 break;
|
|
|
2363 default:
|
|
|
2364 abort ();
|
|
|
2365 }
|
|
|
2366 }
|
|
|
2367
|
|
|
2368 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2369 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2370 This will, for example, convert Japanese characters into stuff such as
|
|
|
2371 \"^[$B!<!+^[(B\" if you use the JIS encoding. Return length of encoded
|
|
|
2372 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2373 */
|
|
|
2374 (start, end, coding_system, buffer))
|
|
|
2375 {
|
|
|
2376 Bufpos b, e;
|
|
|
2377 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2378 Lisp_Object instream, outstream;
|
|
|
2379 char tempbuf[1024]; /* some random amount */
|
|
|
2380 int speccount = specpdl_depth ();
|
|
|
2381 struct gcpro gcpro1, gcpro2;
|
|
|
2382
|
|
|
2383 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2384 coding_system = Fget_coding_system (coding_system);
|
|
|
2385 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2386 outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2387 outstream = make_decoding_output_stream (XLSTREAM (outstream),
|
|
|
2388 Fget_coding_system (Qbinary));
|
|
|
2389 outstream = make_encoding_output_stream (XLSTREAM (outstream),
|
|
|
2390 coding_system);
|
|
|
2391 GCPRO2 (instream, outstream);
|
|
|
2392 record_unwind_protect (close_both_streams, Fcons (instream, outstream));
|
|
|
2393 /* The chain of streams looks like this:
|
|
|
2394
|
|
|
2395 [BUFFER] <----- send through
|
|
|
2396 ------> [ENCODE AS SPECIFIED]
|
|
|
2397 ------> [DECODE AS BINARY]
|
|
|
2398 ------> [BUFFER]
|
|
|
2399
|
|
|
2400 */
|
|
|
2401 while (1)
|
|
|
2402 {
|
|
|
2403 int size_in_bytes;
|
|
|
2404 Bufpos oldpos, newpos, even_newer_pos;
|
|
|
2405
|
|
|
2406 oldpos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2407 size_in_bytes = Lstream_read (XLSTREAM (instream), tempbuf,
|
|
|
2408 sizeof (tempbuf));
|
|
|
2409 if (!size_in_bytes)
|
|
|
2410 break;
|
|
|
2411 newpos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2412 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
2413 even_newer_pos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2414 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2415 even_newer_pos, 0);
|
|
|
2416 }
|
|
|
2417
|
|
|
2418 {
|
|
|
2419 Charcount retlen =
|
|
|
2420 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2421 unbind_to (speccount, Qnil);
|
|
|
2422 UNGCPRO;
|
|
|
2423 return make_int (retlen);
|
|
|
2424 }
|
|
|
2425 }
|
|
|
2426
|
|
|
2427
|
|
|
2428 /************************************************************************/
|
|
|
2429 /* Shift-JIS methods */
|
|
|
2430 /************************************************************************/
|
|
|
2431
|
|
|
2432 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2433 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
|
2434 as is. A character of JISX0201-Kana (TYPE94 character set) is
|
|
|
2435 encoded by "position-code + 0x80". A character of JISX0208
|
|
|
2436 (TYPE94x94 character set) is encoded in 2-byte but two
|
|
|
2437 position-codes are divided and shifted so that it fit in the range
|
|
|
2438 below.
|
|
|
2439
|
|
|
2440 --- CODE RANGE of Shift-JIS ---
|
|
|
2441 (character set) (range)
|
|
|
2442 ASCII 0x00 .. 0x7F
|
|
|
2443 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2444 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2445 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2446 -------------------------------
|
|
|
2447
|
|
|
2448 */
|
|
|
2449
|
|
|
2450 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2451
|
|
|
2452 #define BYTE_SHIFT_JIS_TWO_BYTE_1_P(c) \
|
|
|
2453 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2454
|
|
|
2455 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2456
|
|
|
2457 #define BYTE_SHIFT_JIS_TWO_BYTE_2_P(c) \
|
|
|
2458 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2459
|
|
|
2460 #define BYTE_SHIFT_JIS_KATAKANA_P(c) \
|
|
|
2461 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2462
|
|
|
2463 /* Code conversion macros. These are macros because they are used in
|
|
|
2464 inner loops during code conversion.
|
|
|
2465
|
|
|
2466 Note that temporary variables in macros introduce the classic
|
|
|
2467 dynamic-scoping problems with variable names. We use capital-
|
|
|
2468 lettered variables in the assumption that XEmacs does not use
|
|
|
2469 capital letters in variables except in a very formalized way
|
|
|
2470 (e.g. Qstring). */
|
|
|
2471
|
|
|
2472 /* Convert shift-JIS code (sj1, sj2) into internal string
|
|
|
2473 representation (c1, c2). (The leading byte is assumed.) */
|
|
|
2474
|
|
|
2475 #define DECODE_SHIFT_JIS(sj1, sj2, c1, c2) do \
|
|
|
2476 { \
|
|
|
2477 int I1 = sj1, I2 = sj2; \
|
|
|
2478 if (I2 >= 0x9f) \
|
|
|
2479 { \
|
|
|
2480 if (I1 >= 0xe0) \
|
|
|
2481 c1 = (I1 << 1) - 0xe0; \
|
|
|
2482 else \
|
|
|
2483 c1 = (I1 << 1) - 0x60; \
|
|
|
2484 c2 = I2 + 2; \
|
|
|
2485 } \
|
|
|
2486 else \
|
|
|
2487 { \
|
|
|
2488 if (I1 >= 0xe0) \
|
|
|
2489 c1 = (I1 << 1) - 0xe1; \
|
|
|
2490 else \
|
|
|
2491 c1 = (I1 << 1) - 0x61; \
|
|
|
2492 if (I2 >= 0x7f) \
|
|
|
2493 c2 = I2 + 0x60; \
|
|
|
2494 else \
|
|
|
2495 c2 = I2 + 0x61; \
|
|
|
2496 } \
|
|
|
2497 } while (0)
|
|
|
2498
|
|
|
2499 /* Convert the internal string representation of a Shift-JIS character
|
|
|
2500 (c1, c2) into Shift-JIS code (sj1, sj2). The leading byte is
|
|
|
2501 assumed. */
|
|
|
2502
|
|
|
2503 #define ENCODE_SHIFT_JIS(c1, c2, sj1, sj2) do \
|
|
|
2504 { \
|
|
|
2505 int I1 = c1, I2 = sj2; \
|
|
|
2506 if (I1 & 1) \
|
|
|
2507 { \
|
|
|
2508 if (I1 < 0xdf) \
|
|
|
2509 sj1 = (I1 >> 1) + 0x31; \
|
|
|
2510 else \
|
|
|
2511 sj1 = (I1 >> 1) + 0x71; \
|
|
|
2512 if (I2 >= 0xe0) \
|
|
|
2513 sj2 = I2 - 0x60; \
|
|
|
2514 else \
|
|
|
2515 sj2 = I2 - 0x61; \
|
|
|
2516 } \
|
|
|
2517 else \
|
|
|
2518 { \
|
|
|
2519 if (I1 < 0xdf) \
|
|
|
2520 sj1 = (I1 >> 1) + 0x30; \
|
|
|
2521 else \
|
|
|
2522 sj1 = (I1 >> 1) + 0x70; \
|
|
|
2523 sj2 = I2 - 2; \
|
|
|
2524 } \
|
|
|
2525 } while (0)
|
|
|
2526
|
|
|
2527 static int
|
|
|
2528 detect_coding_shift_jis (struct detection_state *st, CONST unsigned char *src,
|
|
|
2529 unsigned int n)
|
|
|
2530 {
|
|
|
2531 int c;
|
|
|
2532
|
|
|
2533 while (n--)
|
|
|
2534 {
|
|
|
2535 c = *src++;
|
|
|
2536 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2537 return 0;
|
|
|
2538 if (st->shift_jis.in_second_byte)
|
|
|
2539 {
|
|
|
2540 st->shift_jis.in_second_byte = 0;
|
|
|
2541 if (c < 0x40)
|
|
|
2542 return 0;
|
|
|
2543 }
|
|
|
2544 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2545 st->shift_jis.in_second_byte = 1;
|
|
|
2546 }
|
|
|
2547 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2548 }
|
|
|
2549
|
|
|
2550 /* Convert Shift-JIS data to internal format. */
|
|
|
2551
|
|
|
2552 static void
|
|
|
2553 decode_coding_shift_jis (Lstream *decoding, CONST unsigned char *src,
|
|
|
2554 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2555 {
|
|
|
2556 unsigned char c;
|
|
|
2557 unsigned int flags, ch;
|
|
|
2558 int eol;
|
|
|
2559 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2560
|
|
|
2561 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
2562 eol = str->eol_type;
|
|
|
2563
|
|
|
2564 while (n--)
|
|
|
2565 {
|
|
|
2566 c = *src++;
|
|
|
2567
|
|
|
2568 if (ch)
|
|
|
2569 {
|
|
|
2570 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
|
2571 if (BYTE_SHIFT_JIS_TWO_BYTE_2_P (c))
|
|
|
2572 {
|
|
|
2573 unsigned char e1, e2;
|
|
|
2574
|
|
|
2575 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
2576 DECODE_SHIFT_JIS (ch, c, e1, e2);
|
|
|
2577 Dynarr_add (dst, e1);
|
|
|
2578 Dynarr_add (dst, e2);
|
|
|
2579 }
|
|
|
2580 else
|
|
|
2581 {
|
|
|
2582 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2583 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2584 }
|
|
|
2585 ch = 0;
|
|
|
2586 }
|
|
|
2587 else
|
|
|
2588 {
|
|
|
2589 DECODE_HANDLE_EOL_TYPE (eol, c, flags, dst);
|
|
|
2590 if (BYTE_SHIFT_JIS_TWO_BYTE_1_P (c))
|
|
|
2591 ch = c;
|
|
|
2592 else if (BYTE_SHIFT_JIS_KATAKANA_P (c))
|
|
|
2593 {
|
|
|
2594 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0201_KANA);
|
|
|
2595 Dynarr_add (dst, c);
|
|
|
2596 }
|
|
|
2597 else
|
|
|
2598 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2599 }
|
|
|
2600 label_continue_loop:;
|
|
|
2601 }
|
|
|
2602
|
|
|
2603 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2604
|
|
|
2605 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2606 }
|
|
|
2607
|
|
|
2608 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
2609
|
|
|
2610 static void
|
|
|
2611 encode_coding_shift_jis (Lstream *encoding, CONST unsigned char *src,
|
|
|
2612 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2613 {
|
|
|
2614 unsigned char c;
|
|
|
2615 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2616 unsigned int flags, ch;
|
|
|
2617 int eol;
|
|
|
2618
|
|
|
2619 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
2620 eol = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
2621
|
|
|
2622 while (n--)
|
|
|
2623 {
|
|
|
2624 c = *src++;
|
|
|
2625 if (c == '\n')
|
|
|
2626 {
|
|
|
2627 if (eol != EOL_LF && eol != EOL_AUTODETECT)
|
|
|
2628 Dynarr_add (dst, '\r');
|
|
|
2629 if (eol != EOL_CR)
|
|
|
2630 Dynarr_add (dst, '\n');
|
|
|
2631 ch = 0;
|
|
|
2632 }
|
|
|
2633 else if (BYTE_ASCII_P (c))
|
|
|
2634 {
|
|
|
2635 Dynarr_add (dst, c);
|
|
|
2636 ch = 0;
|
|
|
2637 }
|
|
|
2638 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2639 ch = (c == LEADING_BYTE_JAPANESE_JISX0201_KANA ||
|
|
|
2640 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2641 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
2642 else if (ch)
|
|
|
2643 {
|
|
|
2644 if (ch == LEADING_BYTE_JAPANESE_JISX0201_KANA)
|
|
|
2645 {
|
|
|
2646 Dynarr_add (dst, c);
|
|
|
2647 ch = 0;
|
|
|
2648 }
|
|
|
2649 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2650 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
2651 ch = c;
|
|
|
2652 else
|
|
|
2653 {
|
|
|
2654 unsigned char j1, j2;
|
|
|
2655 ENCODE_SHIFT_JIS (ch, c, j1, j2);
|
|
|
2656 Dynarr_add (dst, j1);
|
|
|
2657 Dynarr_add (dst, j2);
|
|
|
2658 ch = 0;
|
|
|
2659 }
|
|
|
2660 }
|
|
|
2661 }
|
|
|
2662
|
|
|
2663 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2664 }
|
|
|
2665
|
|
|
2666 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
2667 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
2668 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
2669 Return the corresponding character.
|
|
|
2670 */
|
|
|
2671 (code))
|
|
|
2672 {
|
|
|
2673 unsigned char c1, c2, s1, s2;
|
|
|
2674
|
|
|
2675 CHECK_CONS (code);
|
|
|
2676 CHECK_INT (XCAR (code));
|
|
|
2677 CHECK_INT (XCDR (code));
|
|
|
2678 s1 = XINT (XCAR (code));
|
|
|
2679 s2 = XINT (XCDR (code));
|
|
|
2680 if (BYTE_SHIFT_JIS_TWO_BYTE_1_P (s1) &&
|
|
|
2681 BYTE_SHIFT_JIS_TWO_BYTE_2_P (s2))
|
|
|
2682 {
|
|
|
2683 DECODE_SHIFT_JIS (s1, s2, c1, c2);
|
|
|
2684 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
2685 c1 & 0x7F, c2 & 0x7F));
|
|
|
2686 }
|
|
|
2687 else
|
|
|
2688 return Qnil;
|
|
|
2689 }
|
|
|
2690
|
|
|
2691 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
2692 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
2693 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
2694 */
|
|
|
2695 (ch))
|
|
|
2696 {
|
|
|
2697 Lisp_Object charset;
|
|
|
2698 int c1, c2, s1, s2;
|
|
|
2699
|
|
|
2700 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2701 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2702 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
2703 {
|
|
|
2704 ENCODE_SHIFT_JIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
|
2705 return Fcons (make_int (s1), make_int (s2));
|
|
|
2706 }
|
|
|
2707 else
|
|
|
2708 return Qnil;
|
|
|
2709 }
|
|
|
2710
|
|
|
2711
|
|
|
2712 /************************************************************************/
|
|
|
2713 /* Big5 methods */
|
|
|
2714 /************************************************************************/
|
|
|
2715
|
|
|
2716 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
2717 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
2718 character set and is encoded in two-byte.
|
|
|
2719
|
|
|
2720 --- CODE RANGE of BIG5 ---
|
|
|
2721 (character set) (range)
|
|
|
2722 ASCII 0x00 .. 0x7F
|
|
|
2723 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
2724 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
2725 --------------------------
|
|
|
2726
|
|
|
2727 Since the number of characters in Big5 is larger than maximum
|
|
|
2728 characters in Emacs' charset (96x96), it can't be handled as one
|
|
|
2729 charset. So, in Emacs, Big5 is devided into two: `charset-big5-1'
|
|
|
2730 and `charset-big5-2'. Both <type>s are TYPE94x94. The former
|
|
|
2731 contains frequently used characters and the latter contains less
|
|
|
2732 frequently used characters. */
|
|
|
2733
|
|
|
2734 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
2735 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
2736
|
|
|
2737 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2738
|
|
|
2739 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
2740 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
2741
|
|
|
2742 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
2743
|
|
|
2744 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
2745
|
|
|
2746 /* Code conversion macros. These are macros because they are used in
|
|
|
2747 inner loops during code conversion.
|
|
|
2748
|
|
|
2749 Note that temporary variables in macros introduce the classic
|
|
|
2750 dynamic-scoping problems with variable names. We use capital-
|
|
|
2751 lettered variables in the assumption that XEmacs does not use
|
|
|
2752 capital letters in variables except in a very formalized way
|
|
|
2753 (e.g. Qstring). */
|
|
|
2754
|
|
|
2755 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
2756 (lb, c1, c2). */
|
|
|
2757
|
|
|
2758 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
2759 For the moment I'm going to leave the algorithm as-is because it
|
|
|
2760 claims to separate out the most-used characters into a single
|
|
|
2761 charset, which perhaps will lead to optimizations in various
|
|
|
2762 places.
|
|
|
2763
|
|
|
2764 The way the algorithm works is something like this:
|
|
|
2765
|
|
|
2766 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
2767 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
2768 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
2769 the split between low and high column numbers is apparently
|
|
|
2770 meaningless; ascending rows produce less and less frequent chars.
|
|
|
2771 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
2772 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
2773 second. To do the conversion, we convert the character into
|
|
|
2774 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
2775 is the second, etc. That way, the characters are ordered by
|
|
|
2776 decreasing frequency. Then we just chop the space in two
|
|
|
2777 and coerce the result into a 94x94 space.
|
|
|
2778 */
|
|
|
2779
|
|
|
2780 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
2781 { \
|
|
|
2782 int B1 = b1, B2 = b2; \
|
|
|
2783 unsigned int I \
|
|
|
2784 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
2785 \
|
|
|
2786 if (B1 < 0xC9) \
|
|
|
2787 { \
|
|
|
2788 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
2789 } \
|
|
|
2790 else \
|
|
|
2791 { \
|
|
|
2792 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
2793 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
2794 } \
|
|
|
2795 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
2796 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
2797 } while (0)
|
|
|
2798
|
|
|
2799 /* Convert the internal string representation of a Big5 character
|
|
|
2800 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
2801
|
|
|
2802 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
2803 { \
|
|
|
2804 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
2805 \
|
|
|
2806 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
2807 { \
|
|
|
2808 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
2809 } \
|
|
|
2810 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
2811 b2 = I % BIG5_SAME_ROW; \
|
|
|
2812 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
2813 } while (0)
|
|
|
2814
|
|
|
2815 static int
|
|
|
2816 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
|
|
2817 unsigned int n)
|
|
|
2818 {
|
|
|
2819 int c;
|
|
|
2820
|
|
|
2821 while (n--)
|
|
|
2822 {
|
|
|
2823 c = *src++;
|
|
|
2824 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
2825 (c >= 0x80 && c <= 0xA0))
|
|
|
2826 return 0;
|
|
|
2827 if (st->big5.in_second_byte)
|
|
|
2828 {
|
|
|
2829 st->big5.in_second_byte = 0;
|
|
|
2830 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
2831 return 0;
|
|
|
2832 }
|
|
|
2833 else if (c >= 0xA1)
|
|
|
2834 st->big5.in_second_byte = 1;
|
|
|
2835 }
|
|
|
2836 return CODING_CATEGORY_BIG5_MASK;
|
|
|
2837 }
|
|
|
2838
|
|
|
2839 /* Convert Big5 data to internal format. */
|
|
|
2840
|
|
|
2841 static void
|
|
|
2842 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
|
|
2843 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2844 {
|
|
|
2845 unsigned char c;
|
|
|
2846 unsigned int flags, ch, eol;
|
|
|
2847 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2848
|
|
|
2849 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
2850 eol = str->eol_type;
|
|
|
2851
|
|
|
2852 while (n--)
|
|
|
2853 {
|
|
|
2854 c = *src++;
|
|
|
2855 if (ch)
|
|
|
2856 {
|
|
|
2857 /* Previous character was first byte of Big5 char. */
|
|
|
2858 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
2859 {
|
|
|
2860 unsigned char b1, b2, b3;
|
|
|
2861 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
2862 Dynarr_add (dst, b1);
|
|
|
2863 Dynarr_add (dst, b2);
|
|
|
2864 Dynarr_add (dst, b3);
|
|
|
2865 }
|
|
|
2866 else
|
|
|
2867 {
|
|
|
2868 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2869 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2870 }
|
|
|
2871 ch = 0;
|
|
|
2872 }
|
|
|
2873 else
|
|
|
2874 {
|
|
|
2875 DECODE_HANDLE_EOL_TYPE (eol, c, flags, dst);
|
|
|
2876 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
2877 ch = c;
|
|
|
2878 else
|
|
|
2879 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2880 }
|
|
|
2881 label_continue_loop:;
|
|
|
2882 }
|
|
|
2883
|
|
|
2884 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2885
|
|
|
2886 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2887 }
|
|
|
2888
|
|
|
2889 /* Convert internally-formatted data to Big5. */
|
|
|
2890
|
|
|
2891 static void
|
|
|
2892 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
|
|
2893 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2894 {
|
|
|
2895 unsigned char c;
|
|
|
2896 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2897 unsigned int flags, ch, eol;
|
|
|
2898
|
|
|
2899 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
2900 eol = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
2901
|
|
|
2902 while (n--)
|
|
|
2903 {
|
|
|
2904 c = *src++;
|
|
|
2905 if (c == '\n')
|
|
|
2906 {
|
|
|
2907 if (eol != EOL_LF && eol != EOL_AUTODETECT)
|
|
|
2908 Dynarr_add (dst, '\r');
|
|
|
2909 if (eol != EOL_CR)
|
|
|
2910 Dynarr_add (dst, '\n');
|
|
|
2911 }
|
|
|
2912 else if (BYTE_ASCII_P (c))
|
|
|
2913 {
|
|
|
2914 /* ASCII. */
|
|
|
2915 Dynarr_add (dst, c);
|
|
|
2916 }
|
|
|
2917 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2918 {
|
|
|
2919 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2920 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2921 {
|
|
|
2922 /* A recognized leading byte. */
|
|
|
2923 ch = c;
|
|
|
2924 continue; /* not done with this character. */
|
|
|
2925 }
|
|
|
2926 /* otherwise just ignore this character. */
|
|
|
2927 }
|
|
|
2928 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2929 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2930 {
|
|
|
2931 /* Previous char was a recognized leading byte. */
|
|
|
2932 ch = (ch << 8) | c;
|
|
|
2933 continue; /* not done with this character. */
|
|
|
2934 }
|
|
|
2935 else if (ch)
|
|
|
2936 {
|
|
|
2937 /* Encountering second byte of a Big5 character. */
|
|
|
2938 unsigned char b1, b2;
|
|
|
2939
|
|
|
2940 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
2941 Dynarr_add (dst, b1);
|
|
|
2942 Dynarr_add (dst, b2);
|
|
|
2943 }
|
|
|
2944
|
|
|
2945 ch = 0;
|
|
|
2946 }
|
|
|
2947
|
|
|
2948 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2949 }
|
|
|
2950
|
|
|
2951
|
|
|
2952 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
2953 Decode a Big5 character CODE of BIG5 coding-system.
|
|
|
2954 CODE is the character code in BIG5.
|
|
|
2955 Return the corresponding character.
|
|
|
2956 */
|
|
|
2957 (code))
|
|
|
2958 {
|
|
|
2959 unsigned char c1, c2, b1, b2;
|
|
|
2960 Lisp_Object charset;
|
|
|
2961
|
|
|
2962 CHECK_CONS (code);
|
|
|
2963 CHECK_INT (XCAR (code));
|
|
|
2964 CHECK_INT (XCDR (code));
|
|
|
2965 b1 = XINT (XCAR (code));
|
|
|
2966 b2 = XINT (XCDR (code));
|
|
|
2967 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
2968 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
2969 {
|
|
|
2970 DECODE_BIG5 (b1, b2, XCHARSET_LEADING_BYTE (charset), c1, c2);
|
|
|
2971 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
2972 }
|
|
|
2973 else
|
|
|
2974 return Qnil;
|
|
|
2975 }
|
|
|
2976
|
|
|
2977 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
2978 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
2979 Return the corresponding character code in Big5.
|
|
|
2980 */
|
|
|
2981 (ch))
|
|
|
2982 {
|
|
|
2983 Lisp_Object charset;
|
|
|
2984 int c1, c2, b1, b2;
|
|
|
2985
|
|
|
2986 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2987 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2988 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
2989 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
2990 {
|
|
|
2991 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
2992 b1, b2);
|
|
|
2993 return Fcons (make_int (b1), make_int (b2));
|
|
|
2994 }
|
|
|
2995 else
|
|
|
2996 return Qnil;
|
|
|
2997 }
|
|
|
2998
|
|
|
2999
|
|
|
3000 /************************************************************************/
|
|
|
3001 /* ISO2022 methods */
|
|
|
3002 /************************************************************************/
|
|
|
3003
|
|
|
3004 /* The following note describes the coding system ISO2022 briefly.
|
|
|
3005 Since the intention of this note is to help understanding of the
|
|
|
3006 programs in this file, some parts are NOT ACCURATE or OVERLY
|
|
|
3007 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
3008 original document of ISO2022.
|
|
|
3009
|
|
|
3010 ISO2022 provides many mechanisms to encode several character sets
|
|
|
3011 in 7-bit and 8-bit environments. If one chooses 7-bit environment,
|
|
|
3012 all text is encoded by codes of less than 128. This may make the
|
|
|
3013 encoded text a little bit longer, but the text get more stability
|
|
|
3014 to pass through several gateways (some of them strip off MSB).
|
|
|
3015
|
|
|
3016 There are two kind of character sets: control character set and
|
|
|
3017 graphic character set. The former contains control characters such
|
|
|
3018 as `newline' and `escape' to provide control functions (control
|
|
|
3019 functions are provided also by escape sequence). The latter
|
|
|
3020 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
3021 two control character sets and many graphic character sets.
|
|
|
3022
|
|
|
3023 Graphic character sets are classified into one of four types,
|
|
|
3024 according to the dimension and number of characters in the set:
|
|
|
3025 TYPE94, TYPE96, TYPE94x94, and TYPE96x96. In addition, each
|
|
|
3026 character set is assigned an identification byte, unique for each
|
|
|
3027 type, called "final character" (denoted as <F> hereafter). The <F>
|
|
|
3028 of each character set is decided by ECMA(*) when it is registered
|
|
|
3029 in ISO. Code range of <F> is 0x30..0x7F (0x30..0x3F are for
|
|
|
3030 private use only).
|
|
|
3031
|
|
|
3032 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
3033
|
|
|
3034 Here are examples of graphic character set [NAME(<F>)]:
|
|
|
3035 o TYPE94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
3036 o TYPE96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
3037 o TYPE94x94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
3038 o TYPE96x96 -- none for the moment
|
|
|
3039
|
|
|
3040 A code area (1byte=8bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
|
3041 C0 [0x00..0x1F] -- control character plane 0
|
|
|
3042 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
3043 C1 [0x80..0x9F] -- control character plane 1
|
|
|
3044 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
3045
|
|
|
3046 A control character set is directly designated and invoked to C0 or
|
|
|
3047 C1 by an escape sequence. The most common case is that:
|
|
|
3048 - ISO646's control character set is designated/invoked to C0, and
|
|
|
3049 - ISO6429's control character set is designated/invoked to C1,
|
|
|
3050 and usually these designations/invocations are omitted in encoded
|
|
|
3051 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
3052 character for C1 is encoded by an appropriate escape sequence to
|
|
|
3053 fit into the environment. All control characters for C1 are
|
|
|
3054 defined to have corresponding escape sequences.
|
|
|
3055
|
|
|
3056 A graphic character set is at first designated to one of four
|
|
|
3057 graphic registers (G0 through G3), then these graphic registers are
|
|
|
3058 invoked to GL or GR. These designations and invocations can be
|
|
|
3059 done independently. The most common case is that G0 is invoked to
|
|
|
3060 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
3061 these invocations and designations are omitted in encoded text.
|
|
|
3062 In a 7-bit environment, only GL can be used.
|
|
|
3063
|
|
|
3064 When a graphic character set of TYPE94 or TYPE94x94 is invoked to
|
|
|
3065 GL, codes 0x20 and 0x7F of the GL area work as control characters
|
|
|
3066 SPACE and DEL respectively, and code 0xA0 and 0xFF of GR area
|
|
|
3067 should not be used.
|
|
|
3068
|
|
|
3069 There are two ways of invocation: locking-shift and single-shift.
|
|
|
3070 With locking-shift, the invocation lasts until the next different
|
|
|
3071 invocation, whereas with single-shift, the invocation works only
|
|
|
3072 for the following character and doesn't affect locking-shift.
|
|
|
3073 Invocations are done by the following control characters or escape
|
|
|
3074 sequences.
|
|
|
3075
|
|
|
3076 ----------------------------------------------------------------------
|
|
|
3077 abbrev function cntrl escape seq description
|
|
|
3078 ----------------------------------------------------------------------
|
|
|
3079 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
3080 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
3081 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR
|
|
|
3082 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
3083 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR
|
|
|
3084 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
|
3085 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR
|
|
|
3086 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
3087 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
3088 ----------------------------------------------------------------------
|
|
|
3089 The first four are for locking-shift. Control characters for these
|
|
|
3090 functions are defined by macros ISO_CODE_XXX in `coding.h'.
|
|
|
3091
|
|
|
3092 Designations are done by the following escape sequences.
|
|
|
3093 ----------------------------------------------------------------------
|
|
|
3094 escape sequence description
|
|
|
3095 ----------------------------------------------------------------------
|
|
|
3096 ESC '(' <F> designate TYPE94<F> to G0
|
|
|
3097 ESC ')' <F> designate TYPE94<F> to G1
|
|
|
3098 ESC '*' <F> designate TYPE94<F> to G2
|
|
|
3099 ESC '+' <F> designate TYPE94<F> to G3
|
|
|
3100 ESC ',' <F> designate TYPE96<F> to G0 (*)
|
|
|
3101 ESC '-' <F> designate TYPE96<F> to G1
|
|
|
3102 ESC '.' <F> designate TYPE96<F> to G2
|
|
|
3103 ESC '/' <F> designate TYPE96<F> to G3
|
|
|
3104 ESC '$' '(' <F> designate TYPE94x94<F> to G0 (**)
|
|
|
3105 ESC '$' ')' <F> designate TYPE94x94<F> to G1
|
|
|
3106 ESC '$' '*' <F> designate TYPE94x94<F> to G2
|
|
|
3107 ESC '$' '+' <F> designate TYPE94x94<F> to G3
|
|
|
3108 ESC '$' ',' <F> designate TYPE96x96<F> to G0 (*)
|
|
|
3109 ESC '$' '-' <F> designate TYPE96x96<F> to G1
|
|
|
3110 ESC '$' '.' <F> designate TYPE96x96<F> to G2
|
|
|
3111 ESC '$' '/' <F> designate TYPE96x96<F> to G3
|
|
|
3112 ----------------------------------------------------------------------
|
|
|
3113 In this list, "TYPE94<F>" means a graphic character set of type TYPE94
|
|
|
3114 and final character <F>, and etc.
|
|
|
3115
|
|
|
3116 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
3117 Emacs accepts them on decoding, and produces them on encoding
|
|
|
3118 TYPE96 or TYPE96x96 character set in a coding system which is
|
|
|
3119 characterized as 7-bit environment, non-locking-shift, and
|
|
|
3120 non-single-shift.
|
|
|
3121
|
|
|
3122 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
|
3123 '(' can be omitted. We call this as "short-form" here after.
|
|
|
3124
|
|
|
3125 Now you may notice that there are a lot of ways for encoding the
|
|
|
3126 same multilingual text in ISO2022. Actually, there exist many
|
|
|
3127 coding systems such as Compound Text (used in X's inter client
|
|
|
3128 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
3129 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
3130 localized platforms), and all of these are variants of ISO2022.
|
|
|
3131
|
|
|
3132 In addition to the above, Emacs handles two more kinds of escape
|
|
|
3133 sequences: ISO6429's direction specification and Emacs' private
|
|
|
3134 sequence for specifying character composition.
|
|
|
3135
|
|
|
3136 ISO6429's direction specification takes the following format:
|
|
|
3137 o CSI ']' -- end of the current direction
|
|
|
3138 o CSI '0' ']' -- end of the current direction
|
|
|
3139 o CSI '1' ']' -- start of left-to-right text
|
|
|
3140 o CSI '2' ']' -- start of right-to-left text
|
|
|
3141 The control character CSI (0x9B: control sequence introducer) is
|
|
|
3142 abbreviated to the escape sequence ESC '[' in 7-bit environment.
|
|
|
3143
|
|
|
3144 Character composition specification takes the following format:
|
|
|
3145 o ESC '0' -- start character composition
|
|
|
3146 o ESC '1' -- end character composition
|
|
|
3147 Since these are not standard escape sequences of any ISO, the use
|
|
|
3148 of them for these meanings is restricted to Emacs only. */
|
|
|
3149
|
|
|
3150 static void
|
|
|
3151 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
3152 {
|
|
|
3153 int i;
|
|
|
3154
|
|
|
3155 for (i = 0; i < 4; i++)
|
|
|
3156 {
|
|
|
3157 if (!NILP (coding_system))
|
|
|
3158 iso->charset[i] =
|
|
|
3159 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
3160 else
|
|
|
3161 iso->charset[i] = Qt;
|
|
|
3162 iso->invalid_designated[i] = 0;
|
|
|
3163 }
|
|
|
3164 iso->esc = ISO_ESC_NOTHING;
|
|
|
3165 iso->esc_bytes_index = 0;
|
|
|
3166 iso->register_left = 0;
|
|
|
3167 iso->register_right = 1;
|
|
|
3168 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3169 iso->invalid_switch_dir = 0;
|
|
|
3170 iso->output_direction_sequence = 0;
|
|
|
3171 iso->output_literally = 0;
|
|
|
3172 if (iso->composite_chars)
|
|
|
3173 Dynarr_reset (iso->composite_chars);
|
|
|
3174 }
|
|
|
3175
|
|
|
3176 static int
|
|
|
3177 fit_to_be_escape_quoted (unsigned char c)
|
|
|
3178 {
|
|
|
3179 switch (c)
|
|
|
3180 {
|
|
|
3181 case ISO_CODE_ESC:
|
|
|
3182 case ISO_CODE_CSI:
|
|
|
3183 case ISO_CODE_SS2:
|
|
|
3184 case ISO_CODE_SS3:
|
|
|
3185 case ISO_CODE_SO:
|
|
|
3186 case ISO_CODE_SI:
|
|
|
3187 return 1;
|
|
|
3188
|
|
|
3189 default:
|
|
|
3190 return 0;
|
|
|
3191 }
|
|
|
3192 }
|
|
|
3193
|
|
|
3194 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
3195 If the result is an invalid escape sequence, return 0 and
|
|
|
3196 do not change anything in STR. Otherwise, if the result is
|
|
|
3197 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
3198 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
3199 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
3200 return 1.
|
|
|
3201
|
|
|
3202 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
3203 or invocation of an invalid character set and treat that as
|
|
|
3204 an unrecognized escape sequence. */
|
|
|
3205
|
|
|
3206 static int
|
|
|
3207 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
3208 unsigned char c, unsigned int *flags,
|
|
|
3209 int check_invalid_charsets)
|
|
|
3210 {
|
|
|
3211 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
3212 charset being designated and REG is the register to designate
|
|
|
3213 it to.
|
|
|
3214
|
|
|
3215 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
3216 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
3217 the half to invoke it into.
|
|
|
3218
|
|
|
3219 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
3220 the register to invoke. */
|
|
|
3221 Lisp_Object cs = Qnil;
|
|
|
3222 int reg, half;
|
|
|
3223
|
|
|
3224 /* NOTE: This code does goto's all over the fucking place.
|
|
|
3225 The reason for this is that we're basically implementing
|
|
|
3226 a state machine here, and hierarchical languages like C
|
|
|
3227 don't really provide a clean way of doing this. */
|
|
|
3228
|
|
|
3229 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
3230 /* At beginning of escape sequence; we need to reset our
|
|
|
3231 escape-state variables. */
|
|
|
3232 iso->esc = ISO_ESC_NOTHING;
|
|
|
3233
|
|
|
3234 iso->output_literally = 0;
|
|
|
3235 iso->output_direction_sequence = 0;
|
|
|
3236
|
|
|
3237 switch (iso->esc)
|
|
|
3238 {
|
|
|
3239 case ISO_ESC_NOTHING:
|
|
|
3240 iso->esc_bytes_index = 0;
|
|
|
3241 switch (c)
|
|
|
3242 {
|
|
|
3243 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
3244 *flags |= CODING_STATE_ESCAPE;
|
|
|
3245 iso->esc = ISO_ESC;
|
|
|
3246 goto not_done;
|
|
|
3247
|
|
|
3248 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
3249 *flags |= CODING_STATE_ESCAPE;
|
|
|
3250 iso->esc = ISO_ESC_5_11;
|
|
|
3251 goto not_done;
|
|
|
3252
|
|
|
3253 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
3254 reg = 1; half = 0;
|
|
|
3255 goto locking_shift;
|
|
|
3256 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
3257 reg = 0; half = 0;
|
|
|
3258 goto locking_shift;
|
|
|
3259
|
|
|
3260 case ISO_CODE_SS2: /* single shift */
|
|
|
3261 reg = 2;
|
|
|
3262 goto single_shift;
|
|
|
3263 case ISO_CODE_SS3: /* single shift */
|
|
|
3264 reg = 3;
|
|
|
3265 goto single_shift;
|
|
|
3266
|
|
|
3267 default: /* Other control characters */
|
|
|
3268 return 0;
|
|
|
3269 }
|
|
|
3270
|
|
|
3271 case ISO_ESC:
|
|
|
3272 switch (c)
|
|
|
3273 {
|
|
|
3274 /**** single shift ****/
|
|
|
3275
|
|
|
3276 case 'N': /* single shift 2 */
|
|
|
3277 reg = 2;
|
|
|
3278 goto single_shift;
|
|
|
3279 case 'O': /* single shift 3 */
|
|
|
3280 reg = 3;
|
|
|
3281 goto single_shift;
|
|
|
3282
|
|
|
3283 /**** locking shift ****/
|
|
|
3284
|
|
|
3285 case '~': /* locking shift 1 right */
|
|
|
3286 reg = 1; half = 1;
|
|
|
3287 goto locking_shift;
|
|
|
3288 case 'n': /* locking shift 2 */
|
|
|
3289 reg = 2; half = 0;
|
|
|
3290 goto locking_shift;
|
|
|
3291 case '}': /* locking shift 2 right */
|
|
|
3292 reg = 2; half = 1;
|
|
|
3293 goto locking_shift;
|
|
|
3294 case 'o': /* locking shift 3 */
|
|
|
3295 reg = 3; half = 0;
|
|
|
3296 goto locking_shift;
|
|
|
3297 case '|': /* locking shift 3 right */
|
|
|
3298 reg = 3; half = 1;
|
|
|
3299 goto locking_shift;
|
|
|
3300
|
|
|
3301 /**** composite ****/
|
|
|
3302
|
|
|
3303 case '0':
|
|
|
3304 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
3305 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
3306 CODING_STATE_COMPOSITE;
|
|
|
3307 return 1;
|
|
|
3308
|
|
|
3309 case '1':
|
|
|
3310 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
3311 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
3312 ~CODING_STATE_COMPOSITE;
|
|
|
3313 return 1;
|
|
|
3314
|
|
|
3315 /**** directionality ****/
|
|
|
3316
|
|
|
3317 case '[':
|
|
|
3318 iso->esc = ISO_ESC_5_11;
|
|
|
3319 goto not_done;
|
|
|
3320
|
|
|
3321 /**** designation ****/
|
|
|
3322
|
|
|
3323 case '$': /* multibyte charset prefix */
|
|
|
3324 iso->esc = ISO_ESC_2_4;
|
|
|
3325 goto not_done;
|
|
|
3326
|
|
|
3327 default:
|
|
|
3328 if (0x28 <= c && c <= 0x2F)
|
|
|
3329 {
|
|
|
3330 iso->esc = c - 0x28 + ISO_ESC_2_8;
|
|
|
3331 goto not_done;
|
|
|
3332 }
|
|
|
3333
|
|
|
3334 /* This function is called with CODESYS equal to nil when
|
|
|
3335 doing coding-system detection. */
|
|
|
3336 if (!NILP (codesys)
|
|
|
3337 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
3338 && fit_to_be_escape_quoted (c))
|
|
|
3339 {
|
|
|
3340 iso->esc = ISO_ESC_LITERAL;
|
|
|
3341 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3342 return 1;
|
|
|
3343 }
|
|
|
3344
|
|
|
3345 /* bzzzt! */
|
|
|
3346 return 0;
|
|
|
3347 }
|
|
|
3348
|
|
|
3349
|
|
|
3350
|
|
|
3351 /**** directionality ****/
|
|
|
3352
|
|
|
3353 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
3354 if (c == ']')
|
|
|
3355 {
|
|
|
3356 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3357 goto directionality;
|
|
|
3358 }
|
|
|
3359 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
3360 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
3361 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
3362 else return 0;
|
|
|
3363 goto not_done;
|
|
|
3364
|
|
|
3365 case ISO_ESC_5_11_0:
|
|
|
3366 if (c == ']')
|
|
|
3367 {
|
|
|
3368 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3369 goto directionality;
|
|
|
3370 }
|
|
|
3371 return 0;
|
|
|
3372
|
|
|
3373 case ISO_ESC_5_11_1:
|
|
|
3374 if (c == ']')
|
|
|
3375 {
|
|
|
3376 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3377 goto directionality;
|
|
|
3378 }
|
|
|
3379 return 0;
|
|
|
3380
|
|
|
3381 case ISO_ESC_5_11_2:
|
|
|
3382 if (c == ']')
|
|
|
3383 {
|
|
|
3384 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
3385 goto directionality;
|
|
|
3386 }
|
|
|
3387 return 0;
|
|
|
3388
|
|
|
3389 directionality:
|
|
|
3390 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
3391 /* Various junk here to attempt to preserve the direction sequences
|
|
|
3392 literally in the text if they would otherwise be swallowed due
|
|
|
3393 to invalid designations that don't show up as actual charset
|
|
|
3394 changes in the text. */
|
|
|
3395 if (iso->invalid_switch_dir)
|
|
|
3396 {
|
|
|
3397 /* We already inserted a direction switch literally into the
|
|
|
3398 text. We assume (#### this may not be right) that the
|
|
|
3399 next direction switch is the one going the other way,
|
|
|
3400 and we need to output that literally as well. */
|
|
|
3401 iso->output_literally = 1;
|
|
|
3402 iso->invalid_switch_dir = 0;
|
|
|
3403 }
|
|
|
3404 else
|
|
|
3405 {
|
|
|
3406 int jj;
|
|
|
3407
|
|
|
3408 /* If we are in the thrall of in invalid designation,
|
|
|
3409 then stick the directionality sequence literally into the
|
|
|
3410 output stream so it ends up in the original text again. */
|
|
|
3411 for (jj = 0; jj < 4; jj++)
|
|
|
3412 if (iso->invalid_designated[jj])
|
|
|
3413 break;
|
|
|
3414 if (jj < 4)
|
|
|
3415 {
|
|
|
3416 iso->output_literally = 1;
|
|
|
3417 iso->invalid_switch_dir = 1;
|
|
|
3418 }
|
|
|
3419 else
|
|
|
3420 /* Indicate that we haven't yet seen a valid designation,
|
|
|
3421 so that if a switch-dir is directly followed by an
|
|
|
3422 invalid designation, both get inserted literally. */
|
|
|
3423 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
3424 }
|
|
|
3425 return 1;
|
|
|
3426
|
|
|
3427
|
|
|
3428 /**** designation ****/
|
|
|
3429
|
|
|
3430 case ISO_ESC_2_4:
|
|
|
3431 if (0x28 <= c && c <= 0x2F)
|
|
|
3432 {
|
|
|
3433 iso->esc = c - 0x28 + ISO_ESC_2_4_8;
|
|
|
3434 goto not_done;
|
|
|
3435 }
|
|
|
3436 if (0x40 <= c && c <= 0x42)
|
|
|
3437 {
|
|
|
3438 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
3439 *flags & CODING_STATE_R2L ?
|
|
|
3440 CHARSET_RIGHT_TO_LEFT :
|
|
|
3441 CHARSET_LEFT_TO_RIGHT);
|
|
|
3442 reg = 0;
|
|
|
3443 goto designated;
|
|
|
3444 }
|
|
|
3445 return 0;
|
|
|
3446
|
|
|
3447 default:
|
|
|
3448 {
|
|
|
3449 int type;
|
|
|
3450
|
|
|
3451 if (c < '0' || c > '~')
|
|
|
3452 return 0; /* bad final byte */
|
|
|
3453
|
|
|
3454 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
3455 iso->esc <= ISO_ESC_2_15)
|
|
|
3456 {
|
|
|
3457 if (iso->esc >= ISO_ESC_2_12)
|
|
|
3458 type = CHARSET_TYPE_96;
|
|
|
3459 else
|
|
|
3460 type = CHARSET_TYPE_94;
|
|
|
3461 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
3462 }
|
|
|
3463 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
3464 iso->esc <= ISO_ESC_2_4_15)
|
|
|
3465 {
|
|
|
3466 if (iso->esc >= ISO_ESC_2_4_12)
|
|
|
3467 type = CHARSET_TYPE_96X96;
|
|
|
3468 else
|
|
|
3469 type = CHARSET_TYPE_94X94;
|
|
|
3470 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
3471 }
|
|
|
3472
|
|
|
3473 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
3474 *flags & CODING_STATE_R2L ?
|
|
|
3475 CHARSET_RIGHT_TO_LEFT :
|
|
|
3476 CHARSET_LEFT_TO_RIGHT);
|
|
|
3477 goto designated;
|
|
|
3478 }
|
|
|
3479 }
|
|
|
3480
|
|
|
3481 not_done:
|
|
|
3482 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
3483 return -1;
|
|
|
3484
|
|
|
3485 single_shift:
|
|
|
3486 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
3487 /* can't invoke something that ain't there. */
|
|
|
3488 return 0;
|
|
|
3489 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
3490 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3491 if (reg == 2)
|
|
|
3492 *flags |= CODING_STATE_SS2;
|
|
|
3493 else
|
|
|
3494 *flags |= CODING_STATE_SS3;
|
|
|
3495 return 1;
|
|
|
3496
|
|
|
3497 locking_shift:
|
|
|
3498 if (check_invalid_charsets &&
|
|
|
3499 !CHARSETP (iso->charset[reg]))
|
|
|
3500 /* can't invoke something that ain't there. */
|
|
|
3501 return 0;
|
|
|
3502 if (half)
|
|
|
3503 iso->register_right = reg;
|
|
|
3504 else
|
|
|
3505 iso->register_left = reg;
|
|
|
3506 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3507 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
3508 return 1;
|
|
|
3509
|
|
|
3510 designated:
|
|
|
3511 if (NILP (cs) && check_invalid_charsets)
|
|
|
3512 {
|
|
|
3513 iso->invalid_designated[reg] = 1;
|
|
|
3514 iso->charset[reg] = Vcharset_ascii;
|
|
|
3515 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3516 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3517 iso->output_literally = 1;
|
|
|
3518 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3519 {
|
|
|
3520 /* We encountered a switch-direction followed by an
|
|
|
3521 invalid designation. Ensure that the switch-direction
|
|
|
3522 gets outputted; otherwise it will probably get eaten
|
|
|
3523 when the text is written out again. */
|
|
|
3524 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3525 iso->output_direction_sequence = 1;
|
|
|
3526 /* And make sure that the switch-dir going the other
|
|
|
3527 way gets outputted, as well. */
|
|
|
3528 iso->invalid_switch_dir = 1;
|
|
|
3529 }
|
|
|
3530 return 1;
|
|
|
3531 }
|
|
|
3532 /* This function is called with CODESYS equal to nil when
|
|
|
3533 doing coding-system detection. */
|
|
|
3534 if (!NILP (codesys))
|
|
|
3535 {
|
|
|
3536 charset_conversion_spec_dynarr *dyn =
|
|
|
3537 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
3538
|
|
|
3539 if (dyn)
|
|
|
3540 {
|
|
|
3541 int i;
|
|
|
3542
|
|
|
3543 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
3544 {
|
|
|
3545 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
3546 if (EQ (cs, spec->from_charset))
|
|
|
3547 cs = spec->to_charset;
|
|
|
3548 }
|
|
|
3549 }
|
|
|
3550 }
|
|
|
3551
|
|
|
3552 iso->charset[reg] = cs;
|
|
|
3553 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3554 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3555 if (iso->invalid_designated[reg])
|
|
|
3556 {
|
|
|
3557 iso->invalid_designated[reg] = 0;
|
|
|
3558 iso->output_literally = 1;
|
|
|
3559 }
|
|
|
3560 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3561 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3562 return 1;
|
|
|
3563 }
|
|
|
3564
|
|
|
3565 static int
|
|
|
3566 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
|
|
3567 unsigned int n)
|
|
|
3568 {
|
|
|
3569 int c;
|
|
|
3570 int mask;
|
|
|
3571
|
|
|
3572 /* #### There are serious deficiencies in the recognition mechanism
|
|
|
3573 here. This needs to be much smarter if it's going to cut it. */
|
|
|
3574
|
|
|
3575 if (!st->iso2022.initted)
|
|
|
3576 {
|
|
|
3577 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
3578 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
3579 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3580 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3581 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
3582 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
3583 st->iso2022.flags = 0;
|
|
|
3584 st->iso2022.high_byte_count = 0;
|
|
|
3585 st->iso2022.saw_single_shift = 0;
|
|
|
3586 st->iso2022.initted = 1;
|
|
|
3587 }
|
|
|
3588
|
|
|
3589 mask = st->iso2022.mask;
|
|
|
3590
|
|
|
3591 while (n--)
|
|
|
3592 {
|
|
|
3593 c = *src++;
|
|
|
3594 if (c >= 0xA0)
|
|
|
3595 {
|
|
|
3596 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3597 st->iso2022.high_byte_count++;
|
|
|
3598 }
|
|
|
3599 else
|
|
|
3600 {
|
|
|
3601 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
3602 {
|
|
|
3603 if (st->iso2022.high_byte_count & 1)
|
|
|
3604 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
3605 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3606 }
|
|
|
3607 st->iso2022.high_byte_count = 0;
|
|
|
3608 st->iso2022.saw_single_shift = 0;
|
|
|
3609 if (c > 0x80)
|
|
|
3610 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3611 }
|
|
|
3612 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
3613 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
3614 { /* control chars */
|
|
|
3615 switch (c)
|
|
|
3616 {
|
|
|
3617 /* Allow and ignore control characters that you might
|
|
|
3618 reasonably see in a text file */
|
|
|
3619 case '\r':
|
|
|
3620 case '\n':
|
|
|
3621 case '\t':
|
|
|
3622 case 7: /* bell */
|
|
|
3623 case 8: /* backspace */
|
|
|
3624 case 11: /* vertical tab */
|
|
|
3625 case 12: /* form feed */
|
|
|
3626 case 26: /* MS-DOS C-z junk */
|
|
|
3627 goto label_continue_loop;
|
|
|
3628
|
|
|
3629 default:
|
|
|
3630 break;
|
|
|
3631 }
|
|
|
3632 }
|
|
|
3633
|
|
|
3634 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
3635 || BYTE_C1_P (c))
|
|
|
3636 {
|
|
|
3637 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
3638 &st->iso2022.flags, 0))
|
|
|
3639 {
|
|
|
3640 switch (st->iso2022.iso.esc)
|
|
|
3641 {
|
|
|
3642 case ISO_ESC_DESIGNATE:
|
|
|
3643 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
3644 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3645 break;
|
|
|
3646 case ISO_ESC_LOCKING_SHIFT:
|
|
|
3647 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
3648 goto ran_out_of_chars;
|
|
|
3649 case ISO_ESC_SINGLE_SHIFT:
|
|
|
3650 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
3651 st->iso2022.saw_single_shift = 1;
|
|
|
3652 break;
|
|
|
3653 default:
|
|
|
3654 break;
|
|
|
3655 }
|
|
|
3656 }
|
|
|
3657 else
|
|
|
3658 {
|
|
|
3659 mask = 0;
|
|
|
3660 goto ran_out_of_chars;
|
|
|
3661 }
|
|
|
3662 }
|
|
|
3663 label_continue_loop:;
|
|
|
3664 }
|
|
|
3665
|
|
|
3666 ran_out_of_chars:
|
|
|
3667
|
|
|
3668 return mask;
|
|
|
3669 }
|
|
|
3670
|
|
|
3671 static int
|
|
|
3672 postprocess_iso2022_mask (int mask)
|
|
|
3673 {
|
|
|
3674 /* #### kind of cheesy */
|
|
|
3675 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
3676 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
3677 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
3678 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3679 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3680 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
3681 return mask;
|
|
|
3682 }
|
|
|
3683
|
|
|
3684 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
3685 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
3686 Also update FLAGS if it is not a null pointer.
|
|
|
3687 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3688 need to handle the CSI differently. */
|
|
|
3689
|
|
|
3690 static void
|
|
|
3691 restore_left_to_right_direction (struct Lisp_Coding_System *codesys,
|
|
|
3692 unsigned_char_dynarr *dst,
|
|
|
3693 unsigned int *flags,
|
|
|
3694 int internal_p)
|
|
|
3695 {
|
|
|
3696 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
3697 {
|
|
|
3698 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3699 {
|
|
|
3700 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3701 Dynarr_add (dst, '[');
|
|
|
3702 }
|
|
|
3703 else if (internal_p)
|
|
|
3704 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3705 else
|
|
|
3706 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3707 Dynarr_add (dst, '0');
|
|
|
3708 Dynarr_add (dst, ']');
|
|
|
3709 if (flags)
|
|
|
3710 *flags &= ~CODING_STATE_R2L;
|
|
|
3711 }
|
|
|
3712 }
|
|
|
3713
|
|
|
3714 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
3715 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
3716 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
3717 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
3718 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3719 need to handle the CSI differently. */
|
|
|
3720
|
|
|
3721 static void
|
|
|
3722 ensure_correct_direction (int direction, struct Lisp_Coding_System *codesys,
|
|
|
3723 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
3724 int internal_p)
|
|
|
3725 {
|
|
|
3726 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
3727 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
3728 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
3729 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
3730 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
3731 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
3732 {
|
|
|
3733 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3734 {
|
|
|
3735 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3736 Dynarr_add (dst, '[');
|
|
|
3737 }
|
|
|
3738 else if (internal_p)
|
|
|
3739 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3740 else
|
|
|
3741 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3742 Dynarr_add (dst, '2');
|
|
|
3743 Dynarr_add (dst, ']');
|
|
|
3744 if (flags)
|
|
|
3745 *flags |= CODING_STATE_R2L;
|
|
|
3746 }
|
|
|
3747 }
|
|
|
3748
|
|
|
3749 /* Convert ISO2022-format data to internal format. */
|
|
|
3750
|
|
|
3751 static void
|
|
|
3752 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3753 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3754 {
|
|
|
3755 unsigned char c;
|
|
|
3756 unsigned int flags, ch;
|
|
|
3757 int eol;
|
|
|
3758 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3759 Lisp_Object coding_system = Qnil;
|
|
|
3760 unsigned_char_dynarr *real_dst = dst;
|
|
|
3761
|
|
|
3762 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
3763 eol = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3764 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
3765
|
|
|
3766 if (flags & CODING_STATE_COMPOSITE)
|
|
|
3767 dst = str->iso2022.composite_chars;
|
|
|
3768
|
|
|
3769 while (n--)
|
|
|
3770 {
|
|
|
3771 c = *src++;
|
|
|
3772 if (flags & CODING_STATE_ESCAPE)
|
|
|
3773 { /* Within ESC sequence */
|
|
|
3774 int retval;
|
|
|
3775
|
|
|
3776 retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
3777 c, &flags, 1);
|
|
|
3778
|
|
|
3779 if (retval)
|
|
|
3780 {
|
|
|
3781 switch (str->iso2022.esc)
|
|
|
3782 {
|
|
|
3783 case ISO_ESC_START_COMPOSITE:
|
|
|
3784 if (str->iso2022.composite_chars)
|
|
|
3785 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
3786 else
|
|
|
3787 str->iso2022.composite_chars = Dynarr_new (unsigned char);
|
|
|
3788 dst = str->iso2022.composite_chars;
|
|
|
3789 break;
|
|
|
3790 case ISO_ESC_END_COMPOSITE:
|
|
|
3791 {
|
|
|
3792 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
3793 Bytecount len;
|
|
|
3794 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
3795 Dynarr_length (dst));
|
|
|
3796 dst = real_dst;
|
|
|
3797 len = set_charptr_emchar (comstr, emch);
|
|
|
3798 Dynarr_add_many (dst, comstr, len);
|
|
|
3799 break;
|
|
|
3800 }
|
|
|
3801
|
|
|
3802 case ISO_ESC_LITERAL:
|
|
|
3803 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3804 break;
|
|
|
3805
|
|
|
3806 default:
|
|
|
3807 /* Everything else handled already */
|
|
|
3808 break;
|
|
|
3809 }
|
|
|
3810 }
|
|
|
3811
|
|
|
3812 /* Attempted error recovery. */
|
|
|
3813 if (str->iso2022.output_direction_sequence)
|
|
|
3814 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
3815 CHARSET_RIGHT_TO_LEFT :
|
|
|
3816 CHARSET_LEFT_TO_RIGHT,
|
|
|
3817 str->codesys, dst, 0, 1);
|
|
|
3818 /* More error recovery. */
|
|
|
3819 if (!retval || str->iso2022.output_literally)
|
|
|
3820 {
|
|
|
3821 /* Output the (possibly invalid) sequence */
|
|
|
3822 int i;
|
|
|
3823 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
3824 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
3825 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3826 if (!retval)
|
|
|
3827 n++, src--;/* Repeat the loop with the same character. */
|
|
|
3828 else
|
|
|
3829 {
|
|
|
3830 /* No sense in reprocessing the final byte of the
|
|
|
3831 escape sequence; it could mess things up anyway.
|
|
|
3832 Just add it now. */
|
|
|
3833 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3834 }
|
|
|
3835 }
|
|
|
3836 ch = 0;
|
|
|
3837 }
|
|
|
3838 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
3839 { /* Control characters */
|
|
|
3840
|
|
|
3841 /***** Error-handling *****/
|
|
|
3842
|
|
|
3843 /* If we were in the middle of a character, dump out the
|
|
|
3844 partial character. */
|
|
|
3845 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3846
|
|
|
3847 /* If we just saw a single-shift character, dump it out.
|
|
|
3848 This may dump out the wrong sort of single-shift character,
|
|
|
3849 but least it will give an indication that something went
|
|
|
3850 wrong. */
|
|
|
3851 if (flags & CODING_STATE_SS2)
|
|
|
3852 {
|
|
|
3853 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
3854 flags &= ~CODING_STATE_SS2;
|
|
|
3855 }
|
|
|
3856 if (flags & CODING_STATE_SS3)
|
|
|
3857 {
|
|
|
3858 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
3859 flags &= ~CODING_STATE_SS3;
|
|
|
3860 }
|
|
|
3861
|
|
|
3862 /***** Now handle the control characters. *****/
|
|
|
3863
|
|
|
3864 /* Handle CR/LF */
|
|
|
3865 DECODE_HANDLE_EOL_TYPE (eol, c, flags, dst);
|
|
|
3866
|
|
|
3867 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3868
|
|
|
3869 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
3870 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3871 }
|
|
|
3872 else
|
|
|
3873 { /* Graphic characters */
|
|
|
3874 Lisp_Object charset;
|
|
|
3875 int lb;
|
|
|
3876 int reg;
|
|
|
3877
|
|
|
3878 DECODE_HANDLE_EOL_TYPE (eol, c, flags, dst);
|
|
|
3879
|
|
|
3880 /* Now determine the charset. */
|
|
|
3881 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
3882 : (flags & CODING_STATE_SS3) ? 3
|
|
|
3883 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
3884 : str->iso2022.register_left);
|
|
|
3885 charset = str->iso2022.charset[reg];
|
|
|
3886
|
|
|
3887 /* Error checking: */
|
|
|
3888 if (NILP (charset) || str->iso2022.invalid_designated[reg]
|
|
|
3889 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
3890 && XCHARSET_CHARS (charset) == 94))
|
|
|
3891 /* Mrmph. We are trying to invoke a register that has no
|
|
|
3892 or an invalid charset in it, or trying to add a character
|
|
|
3893 outside the range of the charset. Insert that char literally
|
|
|
3894 to preserve it for the output. */
|
|
|
3895 {
|
|
|
3896 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3897 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3898 }
|
|
|
3899
|
|
|
3900 else
|
|
|
3901 {
|
|
|
3902 /* Things are probably hunky-dorey. */
|
|
|
3903
|
|
|
3904 /* Fetch reverse charset, maybe. */
|
|
|
3905 if (((flags & CODING_STATE_R2L) &&
|
|
|
3906 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
3907 ||
|
|
|
3908 (!(flags & CODING_STATE_R2L) &&
|
|
|
3909 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
3910 {
|
|
|
3911 Lisp_Object new_charset =
|
|
|
3912 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
3913 if (!NILP (new_charset))
|
|
|
3914 charset = new_charset;
|
|
|
3915 }
|
|
|
3916
|
|
|
3917 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
3918 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3919 {
|
|
|
3920 case 1: /* ASCII */
|
|
|
3921 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3922 Dynarr_add (dst, c & 0x7F);
|
|
|
3923 break;
|
|
|
3924
|
|
|
3925 case 2: /* one-byte official */
|
|
|
3926 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3927 Dynarr_add (dst, lb);
|
|
|
3928 Dynarr_add (dst, c | 0x80);
|
|
|
3929 break;
|
|
|
3930
|
|
|
3931 case 3: /* one-byte private or two-byte official */
|
|
|
3932 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3933 {
|
|
|
3934 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3935 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
3936 Dynarr_add (dst, lb);
|
|
|
3937 Dynarr_add (dst, c | 0x80);
|
|
|
3938 }
|
|
|
3939 else
|
|
|
3940 {
|
|
|
3941 if (ch)
|
|
|
3942 {
|
|
|
3943 Dynarr_add (dst, lb);
|
|
|
3944 Dynarr_add (dst, ch | 0x80);
|
|
|
3945 Dynarr_add (dst, c | 0x80);
|
|
|
3946 ch = 0;
|
|
|
3947 }
|
|
|
3948 else
|
|
|
3949 ch = c;
|
|
|
3950 }
|
|
|
3951 break;
|
|
|
3952
|
|
|
3953 default: /* two-byte private */
|
|
|
3954 if (ch)
|
|
|
3955 {
|
|
|
3956 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
3957 Dynarr_add (dst, lb);
|
|
|
3958 Dynarr_add (dst, ch | 0x80);
|
|
|
3959 Dynarr_add (dst, c | 0x80);
|
|
|
3960 ch = 0;
|
|
|
3961 }
|
|
|
3962 else
|
|
|
3963 ch = c;
|
|
|
3964 }
|
|
|
3965 }
|
|
|
3966
|
|
|
3967 if (!ch)
|
|
|
3968 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3969 }
|
|
|
3970
|
|
|
3971 label_continue_loop:;
|
|
|
3972 }
|
|
|
3973
|
|
|
3974 if (flags & CODING_STATE_END)
|
|
|
3975 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3976
|
|
|
3977 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
3978 }
|
|
|
3979
|
|
|
3980
|
|
|
3981 /***** ISO2022 encoder *****/
|
|
|
3982
|
|
|
3983 /* Designate CHARSET into register REG. */
|
|
|
3984
|
|
|
3985 static void
|
|
|
3986 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
3987 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
3988 {
|
|
|
3989 CONST char *inter94 = "()*+", *inter96= ",-./";
|
|
|
3990 int type;
|
|
|
3991 unsigned char final;
|
|
|
3992 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
3993
|
|
|
3994 str->iso2022.charset[reg] = charset;
|
|
|
3995 if (!CHARSETP (charset))
|
|
|
3996 /* charset might be an initial nil or t. */
|
|
|
3997 return;
|
|
|
3998 type = XCHARSET_TYPE (charset);
|
|
|
3999 final = XCHARSET_FINAL (charset);
|
|
|
4000 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
4001 CHARSETP (old_charset) &&
|
|
|
4002 XCHARSET_TYPE (old_charset) == type &&
|
|
|
4003 XCHARSET_FINAL (old_charset) == final)
|
|
|
4004 return;
|
|
|
4005
|
|
|
4006 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
4007
|
|
|
4008 {
|
|
|
4009 charset_conversion_spec_dynarr *dyn =
|
|
|
4010 str->codesys->iso2022.output_conv;
|
|
|
4011
|
|
|
4012 if (dyn)
|
|
|
4013 {
|
|
|
4014 int i;
|
|
|
4015
|
|
|
4016 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4017 {
|
|
|
4018 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4019 if (EQ (charset, spec->from_charset))
|
|
|
4020 charset = spec->to_charset;
|
|
|
4021 }
|
|
|
4022 }
|
|
|
4023 }
|
|
|
4024
|
|
|
4025 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4026 switch (type)
|
|
|
4027 {
|
|
|
4028 case CHARSET_TYPE_94:
|
|
|
4029 Dynarr_add (dst, inter94[reg]);
|
|
|
4030 break;
|
|
|
4031 case CHARSET_TYPE_96:
|
|
|
4032 Dynarr_add (dst, inter96[reg]);
|
|
|
4033 break;
|
|
|
4034 case CHARSET_TYPE_94X94:
|
|
|
4035 Dynarr_add (dst, '$');
|
|
|
4036 if (reg != 0
|
|
|
4037 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
4038 || final < '@'
|
|
|
4039 || final > 'B')
|
|
|
4040 Dynarr_add (dst, inter94[reg]);
|
|
|
4041 break;
|
|
|
4042 case CHARSET_TYPE_96X96:
|
|
|
4043 Dynarr_add (dst, '$');
|
|
|
4044 Dynarr_add (dst, inter96[reg]);
|
|
|
4045 break;
|
|
|
4046 }
|
|
|
4047 Dynarr_add (dst, final);
|
|
|
4048 }
|
|
|
4049
|
|
|
4050 static void
|
|
|
4051 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4052 {
|
|
|
4053 if (str->iso2022.register_left != 0)
|
|
|
4054 {
|
|
|
4055 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
4056 str->iso2022.register_left = 0;
|
|
|
4057 }
|
|
|
4058 }
|
|
|
4059
|
|
|
4060 static void
|
|
|
4061 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4062 {
|
|
|
4063 if (str->iso2022.register_left != 1)
|
|
|
4064 {
|
|
|
4065 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
4066 str->iso2022.register_left = 1;
|
|
|
4067 }
|
|
|
4068 }
|
|
|
4069
|
|
|
4070 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
4071
|
|
|
4072 static void
|
|
|
4073 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
|
|
4074 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4075 {
|
|
|
4076 unsigned char charmask, c;
|
|
|
4077 unsigned int flags, ch, eol;
|
|
|
4078 unsigned char char_boundary;
|
|
|
4079 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
4080 struct Lisp_Coding_System *codesys = str->codesys;
|
|
|
4081 int i;
|
|
|
4082 Lisp_Object charset;
|
|
|
4083 int half;
|
|
|
4084
|
|
|
4085 /* flags for handling composite chars. We do a little switcharoo
|
|
|
4086 on the source while we're outputting the composite char. */
|
|
|
4087 unsigned int saved_n;
|
|
|
4088 CONST unsigned char *saved_src;
|
|
|
4089 int in_composite = 0;
|
|
|
4090
|
|
|
4091 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
4092 eol = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
4093 char_boundary = str->iso2022.current_char_boundary;
|
|
|
4094 charset = str->iso2022.current_charset;
|
|
|
4095 half = str->iso2022.current_half;
|
|
|
4096
|
|
|
4097 back_to_square_n:
|
|
|
4098 while (n--)
|
|
|
4099 {
|
|
|
4100 c = *src++;
|
|
|
4101
|
|
|
4102 if (BYTE_ASCII_P (c))
|
|
|
4103 { /* Processing ASCII character */
|
|
|
4104 ch = 0;
|
|
|
4105
|
|
|
4106 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4107
|
|
|
4108 /* Make sure G0 contains ASCII */
|
|
|
4109 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
4110 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
4111 {
|
|
|
4112 ensure_normal_shift (str, dst);
|
|
|
4113 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
4114 }
|
|
|
4115
|
|
|
4116 /* If necessary, restore everything to the default state
|
|
|
4117 at end-of-line */
|
|
|
4118 if (c == '\n' &&
|
|
|
4119 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
4120 {
|
|
|
4121 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4122
|
|
|
4123 ensure_normal_shift (str, dst);
|
|
|
4124
|
|
|
4125 for (i = 0; i < 4; i++)
|
|
|
4126 {
|
|
|
4127 Lisp_Object initial_charset =
|
|
|
4128 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4129 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4130 }
|
|
|
4131 }
|
|
|
4132 if (c == '\n')
|
|
|
4133 {
|
|
|
4134 if (eol != EOL_LF && eol != EOL_AUTODETECT)
|
|
|
4135 Dynarr_add (dst, '\r');
|
|
|
4136 if (eol != EOL_CR)
|
|
|
4137 Dynarr_add (dst, c);
|
|
|
4138 }
|
|
|
4139 else
|
|
|
4140 {
|
|
|
4141 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4142 && fit_to_be_escape_quoted (c))
|
|
|
4143 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4144 Dynarr_add (dst, c);
|
|
|
4145 }
|
|
|
4146 char_boundary = 1;
|
|
|
4147 }
|
|
|
4148
|
|
|
4149 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
4150 { /* Processing Leading Byte */
|
|
|
4151 ch = 0;
|
|
|
4152 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
4153 if (c == PRE_LEADING_BYTE_PRIVATE_1 ||
|
|
|
4154 c == PRE_LEADING_BYTE_PRIVATE_2)
|
|
|
4155 ch = c;
|
|
|
4156 else if (!EQ (charset, Vcharset_control_1)
|
|
|
4157 && !EQ (charset, Vcharset_composite))
|
|
|
4158 {
|
|
|
4159 int reg;
|
|
|
4160
|
|
|
4161 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
4162 codesys, dst, &flags, 0);
|
|
|
4163
|
|
|
4164 /* Now determine which register to use. */
|
|
|
4165 reg = -1;
|
|
|
4166 for (i = 0; i < 4; i++)
|
|
|
4167 {
|
|
|
4168 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
4169 EQ (charset,
|
|
|
4170 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
4171 {
|
|
|
4172 reg = i;
|
|
|
4173 break;
|
|
|
4174 }
|
|
|
4175 }
|
|
|
4176
|
|
|
4177 if (reg == -1)
|
|
|
4178 {
|
|
|
4179 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
4180 {
|
|
|
4181 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
4182 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
4183 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
4184 reg = 1;
|
|
|
4185 else if (!NILP (str->iso2022.charset[2]))
|
|
|
4186 reg = 2;
|
|
|
4187 else if (!NILP (str->iso2022.charset[3]))
|
|
|
4188 reg = 3;
|
|
|
4189 else
|
|
|
4190 reg = 0;
|
|
|
4191 }
|
|
|
4192 else
|
|
|
4193 reg = 0;
|
|
|
4194 }
|
|
|
4195
|
|
|
4196 iso2022_designate (charset, reg, str, dst);
|
|
|
4197
|
|
|
4198 /* Now invoke that register. */
|
|
|
4199 switch (reg)
|
|
|
4200 {
|
|
|
4201 case 0:
|
|
|
4202 ensure_normal_shift (str, dst);
|
|
|
4203 half = 0;
|
|
|
4204 break;
|
|
|
4205
|
|
|
4206 case 1:
|
|
|
4207 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4208 {
|
|
|
4209 ensure_shift_out (str, dst);
|
|
|
4210 half = 0;
|
|
|
4211 }
|
|
|
4212 else
|
|
|
4213 half = 1;
|
|
|
4214 break;
|
|
|
4215
|
|
|
4216 case 2:
|
|
|
4217 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4218 {
|
|
|
4219 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4220 Dynarr_add (dst, 'N');
|
|
|
4221 half = 0;
|
|
|
4222 }
|
|
|
4223 else
|
|
|
4224 {
|
|
|
4225 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
4226 half = 1;
|
|
|
4227 }
|
|
|
4228 break;
|
|
|
4229
|
|
|
4230 case 3:
|
|
|
4231 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4232 {
|
|
|
4233 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4234 Dynarr_add (dst, 'O');
|
|
|
4235 half = 0;
|
|
|
4236 }
|
|
|
4237 else
|
|
|
4238 {
|
|
|
4239 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
4240 half = 1;
|
|
|
4241 }
|
|
|
4242 break;
|
|
|
4243
|
|
|
4244 default:
|
|
|
4245 abort ();
|
|
|
4246 }
|
|
|
4247 }
|
|
|
4248 char_boundary = 0;
|
|
|
4249 }
|
|
|
4250 else
|
|
|
4251 { /* Processing Non-ASCII character */
|
|
|
4252 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
4253 char_boundary = 1;
|
|
|
4254 if (EQ (charset, Vcharset_control_1))
|
|
|
4255 {
|
|
|
4256 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4257 && fit_to_be_escape_quoted (c))
|
|
|
4258 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4259 /* you asked for it ... */
|
|
|
4260 Dynarr_add (dst, c - 0x20);
|
|
|
4261 }
|
|
|
4262 else
|
|
|
4263 {
|
|
|
4264 switch (XCHARSET_REP_BYTES (charset))
|
|
|
4265 {
|
|
|
4266 case 2:
|
|
|
4267 Dynarr_add (dst, c & charmask);
|
|
|
4268 break;
|
|
|
4269 case 3:
|
|
|
4270 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4271 {
|
|
|
4272 Dynarr_add (dst, c & charmask);
|
|
|
4273 ch = 0;
|
|
|
4274 }
|
|
|
4275 else if (ch)
|
|
|
4276 {
|
|
|
4277 if (EQ (charset, Vcharset_composite))
|
|
|
4278 {
|
|
|
4279 if (in_composite)
|
|
|
4280 {
|
|
|
4281 /* #### Bother! We don't know how to
|
|
|
4282 handle this yet. */
|
|
|
4283 Dynarr_add (dst, '~');
|
|
|
4284 }
|
|
|
4285 else
|
|
|
4286 {
|
|
|
4287 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
4288 ch & 0x7F, c & 0x7F);
|
|
|
4289 Lisp_Object lstr = composite_char_string (emch);
|
|
|
4290 saved_n = n;
|
|
|
4291 saved_src = src;
|
|
|
4292 in_composite = 1;
|
|
|
4293 src = XSTRING_DATA (lstr);
|
|
|
4294 n = XSTRING_LENGTH (lstr);
|
|
|
4295 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4296 Dynarr_add (dst, '0'); /* start composing */
|
|
|
4297 }
|
|
|
4298 }
|
|
|
4299 else
|
|
|
4300 {
|
|
|
4301 Dynarr_add (dst, ch & charmask);
|
|
|
4302 Dynarr_add (dst, c & charmask);
|
|
|
4303 }
|
|
|
4304 ch = 0;
|
|
|
4305 }
|
|
|
4306 else
|
|
|
4307 {
|
|
|
4308 ch = c;
|
|
|
4309 char_boundary = 0;
|
|
|
4310 }
|
|
|
4311 break;
|
|
|
4312 case 4:
|
|
|
4313 if (ch)
|
|
|
4314 {
|
|
|
4315 Dynarr_add (dst, ch & charmask);
|
|
|
4316 Dynarr_add (dst, c & charmask);
|
|
|
4317 ch = 0;
|
|
|
4318 }
|
|
|
4319 else
|
|
|
4320 {
|
|
|
4321 ch = c;
|
|
|
4322 char_boundary = 0;
|
|
|
4323 }
|
|
|
4324 break;
|
|
|
4325 default:
|
|
|
4326 abort ();
|
|
|
4327 }
|
|
|
4328 }
|
|
|
4329 }
|
|
|
4330 }
|
|
|
4331
|
|
|
4332 if (in_composite)
|
|
|
4333 {
|
|
|
4334 n = saved_n;
|
|
|
4335 src = saved_src;
|
|
|
4336 in_composite = 0;
|
|
|
4337 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4338 Dynarr_add (dst, '1'); /* end composing */
|
|
|
4339 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
4340 }
|
|
|
4341
|
|
|
4342 if (char_boundary && flags & CODING_STATE_END)
|
|
|
4343 {
|
|
|
4344 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4345 ensure_normal_shift (str, dst);
|
|
|
4346 for (i = 0; i < 4; i++)
|
|
|
4347 {
|
|
|
4348 Lisp_Object initial_charset =
|
|
|
4349 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4350 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4351 }
|
|
|
4352 }
|
|
|
4353
|
|
|
4354 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4355 str->iso2022.current_char_boundary = char_boundary;
|
|
|
4356 str->iso2022.current_charset = charset;
|
|
|
4357 str->iso2022.current_half = half;
|
|
|
4358
|
|
|
4359 /* Verbum caro factum est! */
|
|
|
4360 }
|
|
|
4361
|
|
|
4362
|
|
|
4363 /************************************************************************/
|
|
|
4364 /* No-conversion methods */
|
|
|
4365 /************************************************************************/
|
|
|
4366
|
|
|
4367 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
4368 contain all 256 possible byte values and that are not to be
|
|
|
4369 interpreted as being in any particular decoding. */
|
|
|
4370 static void
|
|
|
4371 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
|
|
4372 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4373 {
|
|
|
4374 unsigned char c;
|
|
|
4375 unsigned int flags, ch;
|
|
|
4376 int eol;
|
|
|
4377 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
4378
|
|
|
4379 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
4380 eol = str->eol_type;
|
|
|
4381
|
|
|
4382 while (n--)
|
|
|
4383 {
|
|
|
4384 c = *src++;
|
|
|
4385
|
|
|
4386 DECODE_HANDLE_EOL_TYPE (eol, c, flags, dst);
|
|
|
4387 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4388 label_continue_loop:;
|
|
|
4389 }
|
|
|
4390
|
|
|
4391 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
4392
|
|
|
4393 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4394 }
|
|
|
4395
|
|
|
4396 static void
|
|
|
4397 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
|
|
4398 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4399 {
|
|
|
4400 unsigned char c;
|
|
|
4401 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
4402 unsigned int flags, ch, eol;
|
|
|
4403
|
|
|
4404 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
|
4405 eol = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
4406
|
|
|
4407 while (n--)
|
|
|
4408 {
|
|
|
4409 c = *src++;
|
|
|
4410 if (c == '\n')
|
|
|
4411 {
|
|
|
4412 if (eol != EOL_LF && eol != EOL_AUTODETECT)
|
|
|
4413 Dynarr_add (dst, '\r');
|
|
|
4414 if (eol != EOL_CR)
|
|
|
4415 Dynarr_add (dst, '\n');
|
|
|
4416 ch = 0;
|
|
|
4417 }
|
|
|
4418 else if (BYTE_ASCII_P (c))
|
|
|
4419 {
|
|
|
4420 assert (ch == 0);
|
|
|
4421 Dynarr_add (dst, c);
|
|
|
4422 }
|
|
|
4423 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
4424 {
|
|
|
4425 assert (ch == 0);
|
|
|
4426 if (c == LEADING_BYTE_LATIN_1 || c == LEADING_BYTE_CONTROL_1)
|
|
|
4427 ch = c;
|
|
|
4428 else
|
|
|
4429 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
4430 }
|
|
|
4431 else
|
|
|
4432 {
|
|
|
4433 if (ch == LEADING_BYTE_LATIN_1)
|
|
|
4434 Dynarr_add (dst, c);
|
|
|
4435 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
4436 {
|
|
|
4437 assert (c < 0xC0);
|
|
|
4438 Dynarr_add (dst, c - 0x20);
|
|
|
4439 }
|
|
|
4440 /* else it should be the second or third byte of an
|
|
|
4441 untranslatable character, so ignore it */
|
|
|
4442 ch = 0;
|
|
|
4443 }
|
|
|
4444 }
|
|
|
4445
|
|
|
4446 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4447 }
|
|
|
4448
|
|
|
4449
|
|
|
4450 /************************************************************************/
|
|
|
4451 /* Simple internal/external functions */
|
|
|
4452 /************************************************************************/
|
|
|
4453
|
|
|
4454 static extbyte_dynarr *conversion_out_dynarr;
|
|
|
4455 static bufbyte_dynarr *conversion_in_dynarr;
|
|
|
4456
|
|
|
4457 /* Determine coding system from coding format */
|
|
|
4458
|
|
|
4459 #define PATHNAME_CODING_SYSTEM \
|
|
|
4460 ((NILP (Vpathname_coding_system) || \
|
|
|
4461 (EQ ((Vpathname_coding_system), Qbinary))) ? \
|
|
|
4462 Qnil : Fget_coding_system (Vpathname_coding_system))
|
|
|
4463
|
|
|
4464 /* #### not correct for all values of `fmt'! */
|
|
|
4465 #define FMT_CODING_SYSTEM(fmt) \
|
|
|
4466 (((fmt) == FORMAT_FILENAME) ? PATHNAME_CODING_SYSTEM : \
|
|
|
4467 ((fmt) == FORMAT_CTEXT ) ? Fget_coding_system (Qctext) : \
|
|
|
4468 ((fmt) == FORMAT_TERMINAL) ? PATHNAME_CODING_SYSTEM : \
|
|
|
4469 Qnil)
|
|
|
4470
|
|
|
4471 extern CONST Extbyte *
|
|
|
4472 convert_to_external_format (CONST Bufbyte *ptr,
|
|
|
4473 Bytecount len,
|
|
|
4474 Extcount *len_out,
|
|
|
4475 enum external_data_format fmt)
|
|
|
4476 {
|
|
|
4477 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
|
4478
|
|
|
4479 if (!conversion_out_dynarr)
|
|
|
4480 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
|
4481 else
|
|
|
4482 Dynarr_reset (conversion_out_dynarr);
|
|
|
4483
|
|
|
4484 if (NILP (coding_system))
|
|
|
4485 {
|
|
|
4486 CONST Bufbyte *end = ptr + len;
|
|
|
4487
|
|
|
4488 for (; ptr < end;)
|
|
|
4489 {
|
|
|
4490 Bufbyte c =
|
|
|
4491 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
|
4492 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
4493 (*ptr == LEADING_BYTE_LATIN_1) ? (*(ptr+1)) :
|
|
|
4494 '~';
|
|
|
4495
|
|
|
4496 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
|
4497 INC_CHARPTR (ptr);
|
|
|
4498 }
|
|
|
4499
|
|
|
4500 #ifdef ERROR_CHECK_BUFPOS
|
|
|
4501 assert (ptr == end);
|
|
|
4502 #endif
|
|
|
4503 }
|
|
|
4504 else
|
|
|
4505 {
|
|
|
4506 Lisp_Object instream =
|
|
|
4507 make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4508 Lisp_Object outstream = make_dynarr_output_stream
|
|
|
4509 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
4510 struct gcpro gcpro1, gcpro2;
|
|
|
4511 char tempbuf[1024]; /* some random amount */
|
|
|
4512
|
|
|
4513 outstream =
|
|
|
4514 make_encoding_output_stream (XLSTREAM (outstream), coding_system);
|
|
|
4515 GCPRO2 (instream, outstream); /* Necessary?? */
|
|
|
4516 while (1)
|
|
|
4517 {
|
|
|
4518 int size_in_bytes = Lstream_read (XLSTREAM (instream),
|
|
|
4519 tempbuf, sizeof (tempbuf));
|
|
|
4520 if (!size_in_bytes)
|
|
|
4521 break;
|
|
|
4522 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
4523 }
|
|
|
4524 Lstream_close (XLSTREAM (instream));
|
|
|
4525 Lstream_close (XLSTREAM (outstream));
|
|
|
4526 UNGCPRO;
|
|
|
4527 }
|
|
|
4528
|
|
|
4529 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
|
4530 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4531 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
4532 }
|
|
|
4533
|
|
|
4534 extern CONST Bufbyte *
|
|
|
4535 convert_from_external_format (CONST Extbyte *ptr,
|
|
|
4536 Extcount len,
|
|
|
4537 Bytecount *len_out,
|
|
|
4538 enum external_data_format fmt)
|
|
|
4539 {
|
|
|
4540 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
|
4541
|
|
|
4542 if (!conversion_in_dynarr)
|
|
|
4543 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
|
4544 else
|
|
|
4545 Dynarr_reset (conversion_in_dynarr);
|
|
|
4546
|
|
|
4547 if (NILP (coding_system))
|
|
|
4548 {
|
|
|
4549 CONST Extbyte *end = ptr + len;
|
|
|
4550 for (; ptr < end; ptr++)
|
|
|
4551 {
|
|
|
4552 Extbyte c = *ptr;
|
|
|
4553 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
|
4554 }
|
|
|
4555 }
|
|
|
4556 else
|
|
|
4557 {
|
|
|
4558 Lisp_Object instream =
|
|
|
4559 make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4560 Lisp_Object outstream = make_dynarr_output_stream
|
|
|
4561 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
4562 struct gcpro gcpro1, gcpro2;
|
|
|
4563 char tempbuf[1024]; /* some random amount */
|
|
|
4564
|
|
|
4565 outstream =
|
|
|
4566 make_decoding_output_stream (XLSTREAM (outstream), coding_system);
|
|
|
4567 GCPRO2 (instream, outstream); /* Necessary?? */
|
|
|
4568 while (1)
|
|
|
4569 {
|
|
|
4570 int size_in_bytes = Lstream_read (XLSTREAM (instream),
|
|
|
4571 tempbuf, sizeof (tempbuf));
|
|
|
4572 if (!size_in_bytes)
|
|
|
4573 break;
|
|
|
4574 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
4575 }
|
|
|
4576 Lstream_close (XLSTREAM (instream));
|
|
|
4577 Lstream_close (XLSTREAM (outstream));
|
|
|
4578 UNGCPRO;
|
|
|
4579 }
|
|
|
4580
|
|
|
4581 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
|
4582 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4583 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
4584 }
|
|
|
4585
|
|
|
4586
|
|
|
4587 /************************************************************************/
|
|
|
4588 /* Initialization */
|
|
|
4589 /************************************************************************/
|
|
|
4590
|
|
|
4591 void
|
|
|
4592 syms_of_mule_coding (void)
|
|
|
4593 {
|
|
|
4594 defsymbol (&Qfile_coding_system, "file-coding-system");
|
|
|
4595 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
4596 "Coding-system error", Qio_error);
|
|
|
4597
|
|
|
4598 DEFSUBR (Fcoding_system_p);
|
|
|
4599 DEFSUBR (Ffind_coding_system);
|
|
|
4600 DEFSUBR (Fget_coding_system);
|
|
|
4601 DEFSUBR (Fcoding_system_list);
|
|
|
4602 DEFSUBR (Fcoding_system_name);
|
|
|
4603 DEFSUBR (Fmake_coding_system);
|
|
|
4604 DEFSUBR (Fcopy_coding_system);
|
|
|
4605 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
4606
|
|
|
4607 DEFSUBR (Fcoding_system_type);
|
|
|
4608 DEFSUBR (Fcoding_system_doc_string);
|
|
|
4609 DEFSUBR (Fcoding_system_property);
|
|
|
4610
|
|
|
4611 DEFSUBR (Fcoding_category_list);
|
|
|
4612 DEFSUBR (Fset_coding_priority_list);
|
|
|
4613 DEFSUBR (Fcoding_priority_list);
|
|
|
4614 DEFSUBR (Fset_coding_category_system);
|
|
|
4615 DEFSUBR (Fcoding_category_system);
|
|
|
4616
|
|
|
4617 DEFSUBR (Fdetect_coding_region);
|
|
|
4618 DEFSUBR (Fdecode_coding_region);
|
|
|
4619 DEFSUBR (Fencode_coding_region);
|
|
|
4620 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
4621 DEFSUBR (Fencode_shift_jis_char);
|
|
|
4622 DEFSUBR (Fdecode_big5_char);
|
|
|
4623 DEFSUBR (Fencode_big5_char);
|
|
|
4624
|
|
|
4625 defsymbol (&Qcoding_system_p, "coding-system-p");
|
|
|
4626
|
|
|
4627 defsymbol (&Qbig5, "big5");
|
|
|
4628 defsymbol (&Qshift_jis, "shift-jis");
|
|
|
4629 defsymbol (&Qno_conversion, "no-conversion");
|
|
|
4630 defsymbol (&Qccl, "ccl");
|
|
|
4631 defsymbol (&Qiso2022, "iso2022");
|
|
|
4632
|
|
|
4633 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
4634 defsymbol (&Qeol_type, "eol-type");
|
|
|
4635 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
4636 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
4637
|
|
|
4638 defsymbol (&Qcr, "cr");
|
|
|
4639 defsymbol (&Qlf, "lf");
|
|
|
4640 defsymbol (&Qcrlf, "crlf");
|
|
|
4641 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
4642 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
4643 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
4644
|
|
|
4645 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
4646 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
4647 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
4648 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
4649 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
4650 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
4651 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
4652 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
4653 defsymbol (&Qshort, "short");
|
|
|
4654 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
4655 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
4656 defsymbol (&Qseven, "seven");
|
|
|
4657 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
4658 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
4659 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
|
4660 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
4661 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
|
4662
|
|
|
4663 defsymbol (&Qencode, "encode");
|
|
|
4664 defsymbol (&Qdecode, "decode");
|
|
|
4665
|
|
|
4666 defsymbol (&Qctext, "ctext");
|
|
|
4667
|
|
|
4668 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
4669 "shift-jis");
|
|
|
4670 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
4671 "iso-7");
|
|
|
4672 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
4673 "iso-8-designate");
|
|
|
4674 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
4675 "iso-8-1");
|
|
|
4676 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
4677 "iso-8-2");
|
|
|
4678 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
4679 "iso-lock-shift");
|
|
|
4680 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
4681 "big5");
|
|
|
4682 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
4683 "no-conversion");
|
|
|
4684 }
|
|
|
4685
|
|
|
4686 void
|
|
|
4687 lstream_type_create_mule_coding (void)
|
|
|
4688 {
|
|
|
4689 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
4690 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
4691 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
4692 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
4693 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
4694 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
4695 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
4696
|
|
|
4697 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
4698 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
4699 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
4700 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
4701 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
4702 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
4703 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
4704 }
|
|
|
4705
|
|
|
4706 void
|
|
|
4707 vars_of_mule_coding (void)
|
|
|
4708 {
|
|
|
4709 int i;
|
|
|
4710
|
|
|
4711 /* Initialize to something reasonable ... */
|
|
|
4712 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
4713 {
|
|
|
4714 coding_category_system[i] = Qnil;
|
|
|
4715 coding_category_by_priority[i] = i;
|
|
|
4716 }
|
|
|
4717
|
|
|
4718 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4719 Coding system used for TTY keyboard input.
|
|
|
4720 Not used under a windowing system.
|
|
|
4721 */ );
|
|
|
4722 Vkeyboard_coding_system = Qnil;
|
|
|
4723
|
|
|
4724 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4725 Coding system used for TTY display output.
|
|
|
4726 Not used under a windowing system.
|
|
|
4727 */ );
|
|
|
4728 Vterminal_coding_system = Qnil;
|
|
|
4729
|
|
|
4730 DEFVAR_LISP ("process-input-coding-system", &Vprocess_input_coding_system /*
|
|
|
4731 Default coding system used by C process routines for inputting data.
|
|
|
4732 This can be changed for a particular process using
|
|
|
4733 `set-process-input-coding-system'.
|
|
|
4734 */ );
|
|
|
4735 Vprocess_input_coding_system = Qnil;
|
|
|
4736
|
|
|
4737 DEFVAR_LISP ("process-output-coding-system",
|
|
|
4738 &Vprocess_output_coding_system /*
|
|
|
4739 Default coding system used by C process routines for outputting data.
|
|
|
4740 This can be changed for a particular process using
|
|
|
4741 `set-process-output-coding-system'.
|
|
|
4742 */ );
|
|
|
4743 Vprocess_output_coding_system = Qnil;
|
|
|
4744
|
|
|
4745 DEFVAR_LISP ("pathname-coding-system", &Vpathname_coding_system /*
|
|
|
4746 Coding system used to convert pathnames when accessing files.
|
|
|
4747 */ );
|
|
|
4748 Vpathname_coding_system = Qnil;
|
|
|
4749 }
|
|
|
4750
|
|
|
4751 void
|
|
|
4752 complex_vars_of_mule_coding (void)
|
|
|
4753 {
|
|
|
4754 staticpro (&Vcoding_system_hashtable);
|
|
|
4755 Vcoding_system_hashtable = make_lisp_hashtable (50, HASHTABLE_NONWEAK,
|
|
|
4756 HASHTABLE_EQ);
|
|
|
4757
|
|
|
4758 the_codesys_prop_dynarr = Dynarr_new (struct codesys_prop);
|
|
|
4759
|
|
|
4760 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
4761 { \
|
|
|
4762 struct codesys_prop csp; \
|
|
|
4763 csp.sym = (Sym); \
|
|
|
4764 csp.prop_type = (Prop_Type); \
|
|
|
4765 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
4766 } while (0)
|
|
|
4767
|
|
|
4768 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
4769 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
4770 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
4771 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
4772 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
4773 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
4774 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
4775
|
|
|
4776 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
4777 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
4778 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
4779 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
4780 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
4781 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
4782 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
4783 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
4784 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
4785 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
4786 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
4787 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
4788 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
4789 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
4790 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
4791 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
4792 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
4793
|
|
|
4794 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
4795 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
4796
|
|
|
4797 /* Need to create this here or we're really screwed. */
|
|
|
4798 Fmake_coding_system (Qno_conversion, Qno_conversion, build_string ("No conversion"),
|
|
|
4799 list2 (Qmnemonic, build_string ("Noconv")));
|
|
|
4800
|
|
|
4801 Fcopy_coding_system (Fcoding_system_property (Qno_conversion, Qeol_lf),
|
|
|
4802 Qbinary);
|
|
|
4803
|
|
|
4804 /* Need this for bootstrapping */
|
|
|
4805 coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
4806 Fget_coding_system (Qno_conversion);
|
|
|
4807 }
|
