Mercurial > hg > xemacs-beta
annotate src/file-coding.c @ 4931:8a08cf0b7583
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Thu, 21 Jan 2010 00:46:37 -0600 |
| parents | a98ca4640147 |
| children | 19a72041c5ed |
| rev | line source |
|---|---|
| 771 | 1 /* Text encoding conversion functions; coding-system object. |
| 2 #### rename me to coding-system.c or coding.c | |
| 428 | 3 Copyright (C) 1991, 1995 Free Software Foundation, Inc. |
| 4 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 3025 | 5 Copyright (C) 2000, 2001, 2002, 2003, 2005 Ben Wing. |
| 428 | 6 |
| 7 This file is part of XEmacs. | |
| 8 | |
| 9 XEmacs is free software; you can redistribute it and/or modify it | |
| 10 under the terms of the GNU General Public License as published by the | |
| 11 Free Software Foundation; either version 2, or (at your option) any | |
| 12 later version. | |
| 13 | |
| 14 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 17 for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 20 along with XEmacs; see the file COPYING. If not, write to | |
| 21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 22 Boston, MA 02111-1307, USA. */ | |
| 23 | |
| 771 | 24 /* Synched up with: Not in FSF. */ |
| 25 | |
| 26 /* Authorship: | |
| 27 | |
| 28 Current primary author: Ben Wing <ben@xemacs.org> | |
| 29 | |
| 30 Rewritten by Ben Wing <ben@xemacs.org>, based originally on coding.c | |
| 31 from Mule 2.? but probably does not share one line of code with that | |
| 32 original source. Rewriting work started around Dec. 1994. or Jan. 1995. | |
| 33 Proceeded in earnest till Nov. 1995. | |
| 34 | |
| 35 Around Feb. 17, 1998, Andy Piper renamed what was then mule-coding.c to | |
| 36 file-coding.c, with the intention of using it to do end-of-line conversion | |
| 37 on non-MULE machines (specifically, on Windows machines). He separated | |
| 38 out the MULE stuff from non-MULE using ifdef's, and searched throughout | |
| 39 the rest of the source tree looking for coding-system-related code that | |
| 40 was ifdef MULE but should be ifdef HAVE_CODING_SYSTEMS. | |
| 41 | |
| 42 Sept. 4 - 8, 1998, Tomohiko Morioka added the UCS_4 and UTF_8 coding system | |
| 43 types, providing a primitive means of decoding and encoding externally- | |
| 44 formatted Unicode/UCS_4 and Unicode/UTF_8 data. | |
| 45 | |
| 46 January 25, 2000, Martin Buchholz redid and fleshed out the coding | |
| 47 system alias handling that was first added in prototype form by | |
| 48 Hrjove Niksic, April 15, 1999. | |
| 49 | |
| 50 April to May 2000, Ben Wing: More major reorganization. Adding features | |
| 51 needed for MS Windows (multibyte, unicode, unicode-to-multibyte), the | |
| 52 "chain" coding system for chaining two together, and doing a lot of | |
| 53 reorganization in preparation for properly abstracting out the different | |
| 54 coding system types. | |
| 55 | |
| 56 June 2001, Ben Wing: Added Unicode support. Eliminated previous | |
| 57 junky Unicode translation support. | |
| 58 | |
| 59 August 2001, Ben Wing: Moved Unicode support to unicode.c. Finished | |
| 60 abstracting everything except detection, which is hard to abstract (see | |
| 61 just below). | |
| 62 | |
| 63 September 2001, Ben Wing: Moved Mule code to mule-coding.c, Windows code | |
| 64 to intl-win32.c. Lots more rewriting; very little code is untouched | |
| 65 from before April 2000. Abstracted the detection code, added multiple | |
| 66 levels of likelihood to increase the reliability of the algorithm. | |
| 67 | |
| 68 October 2001, Ben Wing: HAVE_CODING_SYSTEMS is always now defined. | |
| 69 Removed the conditionals. | |
| 70 */ | |
| 71 | |
| 428 | 72 #include <config.h> |
| 73 #include "lisp.h" | |
| 74 | |
| 75 #include "buffer.h" | |
| 76 #include "elhash.h" | |
| 77 #include "insdel.h" | |
| 78 #include "lstream.h" | |
| 440 | 79 #include "opaque.h" |
| 771 | 80 #include "file-coding.h" |
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81 #include "extents.h" |
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82 #include "rangetab.h" |
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83 #include "chartab.h" |
| 771 | 84 |
| 85 #ifdef HAVE_ZLIB | |
| 86 #include "zlib.h" | |
| 428 | 87 #endif |
| 88 | |
| 89 Lisp_Object Vkeyboard_coding_system; | |
| 90 Lisp_Object Vterminal_coding_system; | |
| 91 Lisp_Object Vcoding_system_for_read; | |
| 92 Lisp_Object Vcoding_system_for_write; | |
| 93 Lisp_Object Vfile_name_coding_system; | |
| 94 | |
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95 Lisp_Object Qaliases, Qcharset_skip_chars_string; |
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96 |
| 771 | 97 #ifdef DEBUG_XEMACS |
| 98 Lisp_Object Vdebug_coding_detection; | |
| 440 | 99 #endif |
| 771 | 100 |
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101 #ifdef MULE |
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102 extern Lisp_Object Vcharset_ascii, Vcharset_control_1, |
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103 Vcharset_latin_iso8859_1; |
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104 #endif |
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105 |
| 771 | 106 typedef struct coding_system_type_entry |
| 107 { | |
| 108 struct coding_system_methods *meths; | |
| 109 } coding_system_type_entry; | |
| 110 | |
| 111 typedef struct | |
| 112 { | |
| 113 Dynarr_declare (coding_system_type_entry); | |
| 114 } coding_system_type_entry_dynarr; | |
| 115 | |
| 116 static coding_system_type_entry_dynarr *the_coding_system_type_entry_dynarr; | |
| 117 | |
| 1204 | 118 static const struct memory_description cste_description_1[] = { |
| 2551 | 119 { XD_BLOCK_PTR, offsetof (coding_system_type_entry, meths), 1, |
| 120 { &coding_system_methods_description } }, | |
| 771 | 121 { XD_END } |
| 122 }; | |
| 123 | |
| 1204 | 124 static const struct sized_memory_description cste_description = { |
| 771 | 125 sizeof (coding_system_type_entry), |
| 126 cste_description_1 | |
| 127 }; | |
| 128 | |
| 1204 | 129 static const struct memory_description csted_description_1[] = { |
| 771 | 130 XD_DYNARR_DESC (coding_system_type_entry_dynarr, &cste_description), |
| 428 | 131 { XD_END } |
| 132 }; | |
| 133 | |
| 1204 | 134 static const struct sized_memory_description csted_description = { |
| 771 | 135 sizeof (coding_system_type_entry_dynarr), |
| 136 csted_description_1 | |
| 137 }; | |
| 138 | |
| 139 static Lisp_Object Vcoding_system_type_list; | |
| 140 | |
| 141 /* Coding system currently associated with each coding category. */ | |
| 142 Lisp_Object coding_category_system[MAX_DETECTOR_CATEGORIES]; | |
| 143 | |
| 144 /* Table of all coding categories in decreasing order of priority. | |
| 145 This describes a permutation of the possible coding categories. */ | |
| 146 int coding_category_by_priority[MAX_DETECTOR_CATEGORIES]; | |
| 147 | |
| 148 /* Value used with to give a unique name to nameless coding systems */ | |
| 149 int coding_system_tick; | |
| 150 | |
| 151 int coding_detector_count; | |
| 152 int coding_detector_category_count; | |
| 153 | |
| 154 detector_dynarr *all_coding_detectors; | |
| 155 | |
| 1204 | 156 static const struct memory_description struct_detector_category_description_1[] |
| 771 | 157 = |
| 158 { | |
| 159 { XD_LISP_OBJECT, offsetof (struct detector_category, sym) }, | |
| 160 { XD_END } | |
| 161 }; | |
| 162 | |
| 1204 | 163 static const struct sized_memory_description struct_detector_category_description = |
| 771 | 164 { |
| 165 sizeof (struct detector_category), | |
| 166 struct_detector_category_description_1 | |
| 428 | 167 }; |
| 168 | |
| 1204 | 169 static const struct memory_description detector_category_dynarr_description_1[] = |
| 771 | 170 { |
| 171 XD_DYNARR_DESC (detector_category_dynarr, | |
| 172 &struct_detector_category_description), | |
| 173 { XD_END } | |
| 174 }; | |
| 175 | |
| 1204 | 176 static const struct sized_memory_description detector_category_dynarr_description = { |
| 771 | 177 sizeof (detector_category_dynarr), |
| 178 detector_category_dynarr_description_1 | |
| 179 }; | |
| 180 | |
| 1204 | 181 static const struct memory_description struct_detector_description_1[] |
| 771 | 182 = |
| 183 { | |
| 2367 | 184 { XD_BLOCK_PTR, offsetof (struct detector, cats), 1, |
| 2551 | 185 { &detector_category_dynarr_description } }, |
| 771 | 186 { XD_END } |
| 187 }; | |
| 188 | |
| 1204 | 189 static const struct sized_memory_description struct_detector_description = |
| 771 | 190 { |
| 191 sizeof (struct detector), | |
| 192 struct_detector_description_1 | |
| 193 }; | |
| 194 | |
| 1204 | 195 static const struct memory_description detector_dynarr_description_1[] = |
| 771 | 196 { |
| 197 XD_DYNARR_DESC (detector_dynarr, &struct_detector_description), | |
| 198 { XD_END } | |
| 199 }; | |
| 200 | |
| 1204 | 201 static const struct sized_memory_description detector_dynarr_description = { |
| 771 | 202 sizeof (detector_dynarr), |
| 203 detector_dynarr_description_1 | |
| 204 }; | |
| 428 | 205 |
| 206 Lisp_Object Qcoding_systemp; | |
| 207 | |
| 771 | 208 Lisp_Object Qraw_text; |
| 428 | 209 |
| 210 Lisp_Object Qmnemonic, Qeol_type; | |
| 211 Lisp_Object Qcr, Qcrlf, Qlf; | |
| 212 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf; | |
| 213 Lisp_Object Qpost_read_conversion; | |
| 214 Lisp_Object Qpre_write_conversion; | |
| 215 | |
| 771 | 216 Lisp_Object Qtranslation_table_for_decode; |
| 217 Lisp_Object Qtranslation_table_for_encode; | |
| 218 Lisp_Object Qsafe_chars; | |
| 219 Lisp_Object Qsafe_charsets; | |
| 220 Lisp_Object Qmime_charset; | |
| 221 Lisp_Object Qvalid_codes; | |
| 222 | |
| 223 Lisp_Object Qno_conversion; | |
| 224 Lisp_Object Qconvert_eol; | |
| 440 | 225 Lisp_Object Qescape_quoted; |
| 771 | 226 Lisp_Object Qencode, Qdecode; |
| 227 | |
| 228 Lisp_Object Qconvert_eol_lf, Qconvert_eol_cr, Qconvert_eol_crlf; | |
| 229 Lisp_Object Qconvert_eol_autodetect; | |
| 230 | |
| 231 Lisp_Object Qnear_certainty, Qquite_probable, Qsomewhat_likely; | |
| 1494 | 232 Lisp_Object Qslightly_likely; |
| 771 | 233 Lisp_Object Qas_likely_as_unlikely, Qsomewhat_unlikely, Qquite_improbable; |
| 234 Lisp_Object Qnearly_impossible; | |
| 235 | |
| 236 Lisp_Object Qdo_eol, Qdo_coding; | |
| 237 | |
| 238 Lisp_Object Qcanonicalize_after_coding; | |
| 239 | |
| 1347 | 240 Lisp_Object QScoding_system_cookie; |
| 241 | |
| 4303 | 242 Lisp_Object Qposix_charset_to_coding_system_hash; |
| 243 | |
| 771 | 244 /* This is used to convert autodetected coding systems into existing |
| 245 systems. For example, the chain undecided->convert-eol-autodetect may | |
| 246 have its separate parts detected as mswindows-multibyte and | |
| 247 convert-eol-crlf, and the result needs to be mapped to | |
| 248 mswindows-multibyte-dos. */ | |
| 249 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 250 any more. */ | |
| 251 static Lisp_Object Vchain_canonicalize_hash_table; | |
| 252 | |
| 253 #ifdef HAVE_ZLIB | |
| 254 Lisp_Object Qgzip; | |
| 428 | 255 #endif |
| 771 | 256 |
| 2297 | 257 /* Maps symbols (coding system names) to either coding system objects or |
| 258 (for aliases) other names. */ | |
| 771 | 259 static Lisp_Object Vcoding_system_hash_table; |
| 428 | 260 |
| 261 int enable_multibyte_characters; | |
| 262 | |
| 263 EXFUN (Fcopy_coding_system, 2); | |
| 264 | |
| 265 | |
| 266 /************************************************************************/ | |
| 771 | 267 /* Coding system object methods */ |
| 428 | 268 /************************************************************************/ |
| 269 | |
| 270 static Lisp_Object | |
| 271 mark_coding_system (Lisp_Object obj) | |
| 272 { | |
| 273 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj); | |
| 274 | |
| 1204 | 275 #define MARKED_SLOT(x) mark_object (codesys->x); |
| 276 #include "coding-system-slots.h" | |
| 771 | 277 |
| 278 MAYBE_CODESYSMETH (codesys, mark, (obj)); | |
| 428 | 279 |
| 1204 | 280 return Qnil; |
| 428 | 281 } |
| 282 | |
| 283 static void | |
| 771 | 284 print_coding_system_properties (Lisp_Object obj, Lisp_Object printcharfun) |
| 285 { | |
| 286 Lisp_Coding_System *c = XCODING_SYSTEM (obj); | |
| 287 print_internal (c->methods->type, printcharfun, 1); | |
| 288 MAYBE_CODESYSMETH (c, print, (obj, printcharfun, 1)); | |
| 289 if (CODING_SYSTEM_EOL_TYPE (c) != EOL_AUTODETECT) | |
| 290 write_fmt_string_lisp (printcharfun, " eol-type=%s", | |
| 291 1, Fcoding_system_property (obj, Qeol_type)); | |
| 292 } | |
| 293 | |
| 294 static void | |
| 428 | 295 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun, |
| 2286 | 296 int UNUSED (escapeflag)) |
| 428 | 297 { |
| 298 Lisp_Coding_System *c = XCODING_SYSTEM (obj); | |
| 299 if (print_readably) | |
| 4846 | 300 printing_unreadable_lcrecord (obj, 0); |
| 771 | 301 |
| 302 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name); | |
| 303 print_coding_system_properties (obj, printcharfun); | |
| 826 | 304 write_c_string (printcharfun, ">"); |
| 428 | 305 } |
| 306 | |
| 771 | 307 /* Print an abbreviated version of a coding system (but still containing |
| 308 all the information), for use within a coding system print method. */ | |
| 309 | |
| 310 static void | |
| 311 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun, | |
| 2286 | 312 int UNUSED (escapeflag)) |
| 771 | 313 { |
| 800 | 314 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs)); |
| 771 | 315 print_coding_system_properties (cs, printcharfun); |
| 826 | 316 write_c_string (printcharfun, "]"); |
| 771 | 317 } |
| 318 | |
| 3263 | 319 #ifndef NEW_GC |
| 428 | 320 static void |
| 321 finalize_coding_system (void *header, int for_disksave) | |
| 322 { | |
| 771 | 323 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header); |
| 428 | 324 /* Since coding systems never go away, this function is not |
| 325 necessary. But it would be necessary if we changed things | |
| 326 so that coding systems could go away. */ | |
| 327 if (!for_disksave) /* see comment in lstream.c */ | |
| 771 | 328 MAYBE_XCODESYSMETH (cs, finalize, (cs)); |
| 329 } | |
| 3263 | 330 #endif /* not NEW_GC */ |
| 771 | 331 |
| 332 static Bytecount | |
| 333 sizeof_coding_system (const void *header) | |
| 334 { | |
| 335 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header; | |
| 336 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size; | |
| 428 | 337 } |
| 338 | |
| 1204 | 339 static const struct memory_description coding_system_methods_description_1[] |
| 771 | 340 = { |
| 341 { XD_LISP_OBJECT, | |
| 342 offsetof (struct coding_system_methods, type) }, | |
| 343 { XD_LISP_OBJECT, | |
| 344 offsetof (struct coding_system_methods, predicate_symbol) }, | |
| 345 { XD_END } | |
| 346 }; | |
| 347 | |
| 1204 | 348 const struct sized_memory_description coding_system_methods_description = { |
| 771 | 349 sizeof (struct coding_system_methods), |
| 350 coding_system_methods_description_1 | |
| 351 }; | |
| 352 | |
| 1204 | 353 static const struct sized_memory_description coding_system_extra_description_map[] = |
| 354 { | |
| 355 { offsetof (Lisp_Coding_System, methods) }, | |
| 356 { offsetof (struct coding_system_methods, extra_description) }, | |
| 357 { -1 }, | |
| 771 | 358 }; |
| 359 | |
| 1204 | 360 static const struct memory_description coding_system_description[] = |
| 428 | 361 { |
| 2367 | 362 { XD_BLOCK_PTR, offsetof (Lisp_Coding_System, methods), 1, |
| 2551 | 363 { &coding_system_methods_description } }, |
| 1204 | 364 #define MARKED_SLOT(x) { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, x) }, |
| 365 #define MARKED_SLOT_ARRAY(slot, size) \ | |
| 366 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, slot), size }, | |
| 367 #include "coding-system-slots.h" | |
| 2367 | 368 { XD_BLOCK_ARRAY, offsetof (Lisp_Coding_System, data), 1, |
| 2551 | 369 { coding_system_extra_description_map } }, |
| 1204 | 370 { XD_END } |
| 771 | 371 }; |
| 372 | |
| 1204 | 373 static const struct memory_description coding_system_empty_extra_description_1[] = |
| 374 { | |
| 375 { XD_END } | |
| 376 }; | |
| 377 | |
| 378 const struct sized_memory_description coding_system_empty_extra_description = { | |
| 379 0, coding_system_empty_extra_description_1 | |
| 380 }; | |
| 381 | |
| 3263 | 382 #ifdef NEW_GC |
| 383 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system, | |
| 384 1, /*dumpable-flag*/ | |
| 385 mark_coding_system, | |
| 386 print_coding_system, | |
| 387 0, 0, 0, coding_system_description, | |
| 388 sizeof_coding_system, | |
| 389 Lisp_Coding_System); | |
| 390 #else /* not NEW_GC */ | |
| 934 | 391 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system, |
| 392 1, /*dumpable-flag*/ | |
| 393 mark_coding_system, | |
| 394 print_coding_system, | |
| 395 finalize_coding_system, | |
| 396 0, 0, coding_system_description, | |
| 397 sizeof_coding_system, | |
| 398 Lisp_Coding_System); | |
| 3263 | 399 #endif /* not NEW_GC */ |
| 771 | 400 |
| 401 /************************************************************************/ | |
| 402 /* Creating coding systems */ | |
| 403 /************************************************************************/ | |
| 404 | |
| 405 static struct coding_system_methods * | |
| 406 decode_coding_system_type (Lisp_Object type, Error_Behavior errb) | |
| 428 | 407 { |
| 771 | 408 int i; |
| 409 | |
| 410 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++) | |
| 428 | 411 { |
| 771 | 412 if (EQ (type, |
| 413 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type)) | |
| 414 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths; | |
| 428 | 415 } |
| 771 | 416 |
| 417 maybe_invalid_constant ("Invalid coding system type", type, | |
| 418 Qcoding_system, errb); | |
| 419 | |
| 420 return 0; | |
| 428 | 421 } |
| 422 | |
| 771 | 423 static int |
| 424 valid_coding_system_type_p (Lisp_Object type) | |
| 428 | 425 { |
| 771 | 426 return decode_coding_system_type (type, ERROR_ME_NOT) != 0; |
| 427 } | |
| 428 | |
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429 #ifdef MULE |
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430 static Lisp_Object Vdefault_query_coding_region_chartab_cache; |
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431 |
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432 /* Non-static because it's used in INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA. */ |
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433 Lisp_Object |
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434 default_query_method (Lisp_Object codesys, struct buffer *buf, |
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435 Charbpos end, int flags) |
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436 { |
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437 Charbpos pos = BUF_PT (buf), fail_range_start, fail_range_end; |
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438 Charbpos pos_byte = BYTE_BUF_PT (buf); |
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439 Lisp_Object safe_charsets = XCODING_SYSTEM_SAFE_CHARSETS (codesys); |
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440 Lisp_Object safe_chars = XCODING_SYSTEM_SAFE_CHARS (codesys), |
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|
441 result = Qnil; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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4647
diff
changeset
|
442 enum query_coding_failure_reasons failed_reason, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
443 previous_failed_reason = query_coding_succeeded; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
444 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
445 /* safe-charsets of t means the coding system can encode everything. */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
446 if (EQ (Qnil, safe_chars)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
447 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
448 if (EQ (Qt, safe_charsets)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
449 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
450 return Qnil; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
451 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
452 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
453 /* If we've no information on what characters the coding system can |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
454 encode, give up. */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
455 if (EQ (Qnil, safe_charsets) && EQ (Qnil, safe_chars)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
456 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
457 return Qunbound; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
458 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
459 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
460 safe_chars = Fgethash (safe_charsets, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
461 Vdefault_query_coding_region_chartab_cache, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
462 Qnil); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
463 if (NILP (safe_chars)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
464 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
465 safe_chars = Fmake_char_table (Qgeneric); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
466 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
467 EXTERNAL_LIST_LOOP_2 (safe_charset, safe_charsets) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
468 Fput_char_table (safe_charset, Qt, safe_chars); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
469 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
470 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
471 Fputhash (safe_charsets, safe_chars, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
472 Vdefault_query_coding_region_chartab_cache); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
473 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
474 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
475 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
476 if (flags & QUERY_METHOD_HIGHLIGHT && |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
477 /* If we're being called really early, live without highlights getting |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
478 cleared properly: */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
479 !(UNBOUNDP (XSYMBOL (Qquery_coding_clear_highlights)->function))) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
480 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
481 /* It's okay to call Lisp here, the only non-stack object we may have |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
482 allocated up to this point is safe_chars, and that's |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
483 reachable from its entry in |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
484 Vdefault_query_coding_region_chartab_cache */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
485 call3 (Qquery_coding_clear_highlights, make_int (pos), make_int (end), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
486 wrap_buffer (buf)); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
487 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
488 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
489 while (pos < end) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
490 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
491 Ichar ch = BYTE_BUF_FETCH_CHAR (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
492 if (!EQ (Qnil, get_char_table (ch, safe_chars))) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
493 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
494 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
495 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
496 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
497 else |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
498 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
499 fail_range_start = pos; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
500 while ((pos < end) && |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
501 (EQ (Qnil, get_char_table (ch, safe_chars)) |
|
4839
5f1c6ca4d05e
fix bad change to default_query_method, rewrite conditional for more correctness
Ben Wing <ben@xemacs.org>
parents:
4830
diff
changeset
|
502 && (failed_reason = query_coding_unencodable, |
|
5f1c6ca4d05e
fix bad change to default_query_method, rewrite conditional for more correctness
Ben Wing <ben@xemacs.org>
parents:
4830
diff
changeset
|
503 (previous_failed_reason == query_coding_succeeded |
|
5f1c6ca4d05e
fix bad change to default_query_method, rewrite conditional for more correctness
Ben Wing <ben@xemacs.org>
parents:
4830
diff
changeset
|
504 || previous_failed_reason == failed_reason)))) |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
505 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
506 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
507 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
508 ch = BYTE_BUF_FETCH_CHAR (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
509 previous_failed_reason = failed_reason; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
510 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
511 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
512 if (fail_range_start == pos) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
513 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
514 /* The character can actually be encoded; move on. */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
515 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
516 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
517 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
518 else |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
519 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
520 assert (previous_failed_reason == query_coding_unencodable); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
521 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
522 if (flags & QUERY_METHOD_ERRORP) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
523 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
524 DECLARE_EISTRING (error_details); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
525 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
526 eicpy_ascii (error_details, "Cannot encode "); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
527 eicat_lstr (error_details, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
528 make_string_from_buffer (buf, fail_range_start, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
529 pos - |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
530 fail_range_start)); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
531 eicat_ascii (error_details, " using coding system"); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
532 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
533 signal_error (Qtext_conversion_error, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
534 (const CIbyte *)(eidata (error_details)), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
535 XCODING_SYSTEM_NAME (codesys)); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
536 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
537 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
538 if (NILP (result)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
539 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
540 result = Fmake_range_table (Qstart_closed_end_open); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
541 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
542 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
543 fail_range_end = pos; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
544 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
545 Fput_range_table (make_int (fail_range_start), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
546 make_int (fail_range_end), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
547 Qunencodable, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
548 result); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
549 previous_failed_reason = query_coding_succeeded; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
550 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
551 if (flags & QUERY_METHOD_HIGHLIGHT) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
552 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
553 Lisp_Object extent |
|
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554 = Fmake_extent (make_int (fail_range_start), |
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555 make_int (fail_range_end), |
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556 wrap_buffer (buf)); |
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557 |
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558 Fset_extent_priority |
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559 (extent, make_int (2 + mouse_highlight_priority)); |
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560 Fset_extent_face (extent, Qquery_coding_warning_face); |
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561 } |
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562 } |
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563 } |
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564 } |
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565 |
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566 return result; |
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567 } |
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568 #else |
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569 Lisp_Object |
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570 default_query_method (Lisp_Object UNUSED (codesys), |
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571 struct buffer * UNUSED (buf), |
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572 Charbpos UNUSED (end), int UNUSED (flags)) |
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573 { |
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574 return Qnil; |
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575 } |
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576 #endif /* defined MULE */ |
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577 |
| 771 | 578 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /* |
| 579 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid. | |
| 580 Valid types depend on how XEmacs was compiled but may include | |
| 3025 | 581 `undecided', `chain', `integer', `ccl', `iso2022', `big5', `shift-jis', |
| 582 `utf-16', `ucs-4', `utf-8', etc. | |
| 771 | 583 */ |
| 584 (coding_system_type)) | |
| 585 { | |
| 586 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil; | |
| 587 } | |
| 588 | |
| 589 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /* | |
| 590 Return a list of valid coding system types. | |
| 591 */ | |
| 592 ()) | |
| 593 { | |
| 594 return Fcopy_sequence (Vcoding_system_type_list); | |
| 595 } | |
| 596 | |
| 597 void | |
| 598 add_entry_to_coding_system_type_list (struct coding_system_methods *meths) | |
| 599 { | |
| 600 struct coding_system_type_entry entry; | |
| 601 | |
| 602 entry.meths = meths; | |
| 603 Dynarr_add (the_coding_system_type_entry_dynarr, entry); | |
| 604 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list); | |
| 428 | 605 } |
| 606 | |
| 607 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /* | |
| 608 Return t if OBJECT is a coding system. | |
| 609 A coding system is an object that defines how text containing multiple | |
| 610 character sets is encoded into a stream of (typically 8-bit) bytes. | |
| 611 The coding system is used to decode the stream into a series of | |
| 612 characters (which may be from multiple charsets) when the text is read | |
| 613 from a file or process, and is used to encode the text back into the | |
| 614 same format when it is written out to a file or process. | |
| 615 | |
| 616 For example, many ISO2022-compliant coding systems (such as Compound | |
| 617 Text, which is used for inter-client data under the X Window System) | |
| 618 use escape sequences to switch between different charsets -- Japanese | |
| 619 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked | |
| 620 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See | |
| 621 `make-coding-system' for more information. | |
| 622 | |
| 623 Coding systems are normally identified using a symbol, and the | |
| 624 symbol is accepted in place of the actual coding system object whenever | |
| 625 a coding system is called for. (This is similar to how faces work.) | |
| 626 */ | |
| 627 (object)) | |
| 628 { | |
| 629 return CODING_SYSTEMP (object) ? Qt : Qnil; | |
| 630 } | |
| 631 | |
| 4303 | 632 static Lisp_Object |
| 633 find_coding_system (Lisp_Object coding_system_or_name, | |
| 634 int do_autoloads) | |
| 635 { | |
| 636 Lisp_Object lookup; | |
| 637 | |
| 638 if (NILP (coding_system_or_name)) | |
| 639 coding_system_or_name = Qbinary; | |
| 640 else if (CODING_SYSTEMP (coding_system_or_name)) | |
| 641 return coding_system_or_name; | |
| 642 else | |
| 643 CHECK_SYMBOL (coding_system_or_name); | |
| 644 | |
| 645 while (1) | |
| 646 { | |
| 647 lookup = | |
| 648 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil); | |
| 649 | |
| 650 if (CONSP (lookup) && do_autoloads) | |
| 651 { | |
| 652 struct gcpro gcpro1; | |
| 653 int length; | |
| 654 DECLARE_EISTRING (desired_base); | |
| 655 DECLARE_EISTRING (warning_info); | |
| 656 | |
| 657 eicpy_lstr (desired_base, XSYMBOL_NAME (coding_system_or_name)); | |
| 658 | |
| 659 /* Work out the name of the base coding system. */ | |
| 660 length = eilen (desired_base); | |
| 661 if (length > (int)(sizeof ("-unix") - 1)) | |
| 662 { | |
| 663 if (0 == qxestrcmp ((UAscbyte *)"-unix", (eidata (desired_base)) | |
| 664 + (length - (sizeof ("-unix") - 1)))) | |
| 665 { | |
| 666 eidel (desired_base, length - (sizeof ("-unix") - 1), | |
| 667 -1, 5, 5); | |
| 668 } | |
| 669 } | |
| 670 else if (length > (int)(sizeof ("-dos") - 1)) | |
| 671 { | |
| 672 if ((0 == qxestrcmp ((UAscbyte *)"-dos", (eidata (desired_base)) | |
| 673 + (length - (sizeof ("-dos") - 1)))) || | |
| 674 (0 == qxestrcmp ((UAscbyte *)"-mac", (eidata (desired_base)) | |
| 675 + (length - (sizeof ("-mac") - 1))))) | |
| 676 { | |
| 677 eidel (desired_base, length - (sizeof ("-dos") - 1), -1, | |
| 678 4, 4); | |
| 679 } | |
| 680 } | |
| 681 | |
| 682 coding_system_or_name = intern_int (eidata (desired_base)); | |
| 683 | |
| 684 /* Remove this coding system and its subsidiary coding | |
| 685 systems from the hash, to avoid calling this code recursively. */ | |
| 686 Fremhash (coding_system_or_name, Vcoding_system_hash_table); | |
| 687 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-unix"), | |
| 688 Vcoding_system_hash_table); | |
| 689 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-dos"), | |
| 690 Vcoding_system_hash_table); | |
| 691 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-mac"), | |
| 692 Vcoding_system_hash_table); | |
| 693 | |
| 694 eicpy_ascii (warning_info, "Error autoloading coding system "); | |
| 695 eicat_lstr (warning_info, XSYMBOL_NAME (coding_system_or_name)); | |
| 696 | |
| 697 /* Keep around the form so it doesn't disappear from under | |
| 698 #'eval's feet. */ | |
| 699 GCPRO1 (lookup); | |
| 700 call1_trapping_problems ((const CIbyte *)eidata (warning_info), | |
| 701 Qeval, lookup, 0); | |
| 702 UNGCPRO; | |
| 703 | |
| 704 lookup = | |
| 705 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil); | |
| 706 } | |
| 707 | |
| 708 if (CODING_SYSTEMP (lookup) || NILP (lookup)) | |
| 709 return lookup; | |
| 710 | |
| 711 coding_system_or_name = lookup; | |
| 712 } | |
| 713 } | |
| 714 | |
| 428 | 715 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /* |
| 716 Retrieve the coding system of the given name. | |
| 717 | |
| 718 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply | |
| 719 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol. | |
| 720 If there is no such coding system, nil is returned. Otherwise the | |
| 721 associated coding system object is returned. | |
| 722 */ | |
| 723 (coding_system_or_name)) | |
| 724 { | |
| 4303 | 725 return find_coding_system(coding_system_or_name, 1); |
| 726 } | |
| 727 | |
| 728 DEFUN ("autoload-coding-system", Fautoload_coding_system, 2, 2, 0, /* | |
| 729 Define SYMBOL as a coding-system that is loaded on demand. | |
| 730 | |
| 731 FORM is a form to evaluate to define the coding-system. | |
| 732 */ | |
| 733 (symbol, form)) | |
| 734 { | |
| 735 Lisp_Object lookup; | |
| 736 | |
| 737 CHECK_SYMBOL (symbol); | |
| 738 CHECK_CONS (form); | |
| 739 | |
| 740 lookup = find_coding_system (symbol, 0); | |
| 741 | |
| 742 if (!NILP (lookup) && | |
| 743 /* Allow autoloads to be redefined. */ | |
| 744 !CONSP (lookup)) | |
| 440 | 745 { |
| 4303 | 746 invalid_operation ("Cannot redefine existing coding system", |
| 747 symbol); | |
| 440 | 748 } |
| 4303 | 749 |
| 750 Fputhash (symbol, form, Vcoding_system_hash_table); | |
| 751 Fputhash (add_suffix_to_symbol(symbol, "-unix"), form, | |
| 752 Vcoding_system_hash_table); | |
| 753 Fputhash (add_suffix_to_symbol(symbol, "-dos"), form, | |
| 754 Vcoding_system_hash_table); | |
| 755 Fputhash (add_suffix_to_symbol(symbol, "-mac"), form, | |
| 756 Vcoding_system_hash_table); | |
| 757 | |
| 758 /* Tell the POSIX locale infrastructure about this coding system (though | |
| 759 unfortunately it'll be too late for the startup locale sniffing. */ | |
| 760 if (!UNBOUNDP (Qposix_charset_to_coding_system_hash)) | |
| 761 { | |
| 762 Lisp_Object val = Fsymbol_value (Qposix_charset_to_coding_system_hash); | |
| 763 DECLARE_EISTRING (minimal_name); | |
| 764 Ibyte *full_name; | |
| 765 int len = XSTRING_LENGTH (XSYMBOL_NAME (symbol)), i; | |
| 766 | |
| 767 if (!NILP (val)) | |
| 768 { | |
| 769 full_name = XSTRING_DATA (XSYMBOL_NAME (symbol)); | |
| 770 for (i = 0; i < len; ++i) | |
| 771 { | |
| 772 if (full_name[i] >= '0' && full_name[i] <= '9') | |
| 773 { | |
| 774 eicat_ch (minimal_name, full_name[i]); | |
| 775 } | |
| 776 else if (full_name[i] >= 'a' && full_name[i] <= 'z') | |
| 777 { | |
| 778 eicat_ch (minimal_name, full_name[i]); | |
| 779 } | |
| 780 else if (full_name[i] >= 'A' && full_name[i] <= 'Z') | |
| 781 { | |
| 782 eicat_ch (minimal_name, full_name[i] + | |
| 783 ('a' - 'A')); | |
| 784 } | |
| 785 } | |
| 786 | |
| 787 if (eilen (minimal_name)) | |
| 788 { | |
| 789 CHECK_HASH_TABLE (val); | |
| 790 Fputhash (eimake_string(minimal_name), symbol, val); | |
| 791 } | |
| 792 } | |
| 793 } | |
| 794 | |
| 795 return Qt; | |
| 428 | 796 } |
| 797 | |
| 798 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /* | |
| 799 Retrieve the coding system of the given name. | |
| 800 Same as `find-coding-system' except that if there is no such | |
| 801 coding system, an error is signaled instead of returning nil. | |
| 802 */ | |
| 803 (name)) | |
| 804 { | |
| 805 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 806 | |
| 807 if (NILP (coding_system)) | |
| 563 | 808 invalid_argument ("No such coding system", name); |
| 428 | 809 return coding_system; |
| 810 } | |
| 811 | |
| 771 | 812 int |
| 813 coding_system_is_binary (Lisp_Object coding_system) | |
| 814 { | |
| 815 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 816 return | |
| 817 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) && | |
| 818 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF && | |
| 819 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) && | |
| 820 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil)); | |
| 821 } | |
| 822 | |
| 823 static Lisp_Object | |
| 824 coding_system_real_canonical (Lisp_Object cs) | |
| 825 { | |
| 826 if (!NILP (XCODING_SYSTEM_CANONICAL (cs))) | |
| 827 return XCODING_SYSTEM_CANONICAL (cs); | |
| 828 return cs; | |
| 829 } | |
| 830 | |
| 831 /* Return true if coding system is of the "standard" type that decodes | |
| 832 bytes into characters (suitable for decoding a text file). */ | |
| 833 int | |
| 834 coding_system_is_for_text_file (Lisp_Object coding_system) | |
| 835 { | |
| 836 return (XCODESYSMETH_OR_GIVEN | |
| 837 (coding_system, conversion_end_type, | |
| 838 (coding_system_real_canonical (coding_system)), | |
| 839 DECODES_BYTE_TO_CHARACTER) == | |
| 840 DECODES_BYTE_TO_CHARACTER); | |
| 841 } | |
| 842 | |
| 843 static int | |
| 844 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 845 { | |
| 846 enum source_sink_type type = | |
| 847 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type, | |
| 848 (coding_system_real_canonical (cs)), | |
| 849 DECODES_BYTE_TO_CHARACTER); | |
| 850 if (sex == CODING_SOURCE) | |
| 851 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 852 type == DECODES_CHARACTER_TO_BYTE); | |
| 853 else | |
| 854 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 855 type == DECODES_BYTE_TO_CHARACTER); | |
| 856 } | |
| 857 | |
| 858 static int | |
| 859 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 860 { | |
| 861 return decoding_source_sink_type_is_char (cs, | |
| 862 /* Sex change */ | |
| 863 sex == CODING_SOURCE ? | |
| 864 CODING_SINK : CODING_SOURCE); | |
| 865 } | |
| 866 | |
| 867 /* Like Ffind_coding_system() but check that the coding system is of the | |
| 868 "standard" type that decodes bytes into characters (suitable for | |
| 869 decoding a text file), and if not, returns an appropriate wrapper that | |
| 870 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 871 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 872 system to do this. */ | |
| 873 | |
| 874 Lisp_Object | |
| 875 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 876 { | |
| 877 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 878 Lisp_Object wrapper = coding_system; | |
| 879 | |
| 880 if (NILP (coding_system)) | |
| 881 return Qnil; | |
| 882 if (!coding_system_is_for_text_file (coding_system)) | |
| 883 { | |
| 884 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system); | |
| 885 if (NILP (wrapper)) | |
| 886 { | |
| 887 Lisp_Object chain; | |
| 888 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK)) | |
| 889 chain = list2 (coding_system, Qbinary); | |
| 890 else | |
| 891 chain = list1 (coding_system); | |
| 892 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE)) | |
| 893 chain = Fcons (Qbinary, chain); | |
| 894 wrapper = | |
| 895 make_internal_coding_system | |
| 896 (coding_system, | |
| 897 "internal-text-file-wrapper", | |
| 898 Qchain, | |
| 899 Qunbound, list4 (Qchain, chain, | |
| 900 Qcanonicalize_after_coding, coding_system)); | |
| 901 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper; | |
| 902 } | |
| 903 } | |
| 904 | |
| 905 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT) | |
| 906 return wrapper; | |
| 907 | |
| 908 coding_system = wrapper; | |
| 909 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system); | |
| 910 if (!NILP (wrapper)) | |
| 911 return wrapper; | |
| 912 wrapper = | |
| 913 make_internal_coding_system | |
| 914 (coding_system, | |
| 915 "internal-auto-eol-wrapper", | |
| 916 Qundecided, Qunbound, | |
| 917 list4 (Qcoding_system, coding_system, | |
| 918 Qdo_eol, Qt)); | |
| 919 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper; | |
| 920 return wrapper; | |
| 921 } | |
| 922 | |
| 923 /* Like Fget_coding_system() but verify that the coding system is of the | |
| 924 "standard" type that decodes bytes into characters (suitable for | |
| 925 decoding a text file), and if not, returns an appropriate wrapper that | |
| 926 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 927 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 928 system to do this. */ | |
| 929 | |
| 930 Lisp_Object | |
| 931 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 932 { | |
| 933 Lisp_Object coding_system = find_coding_system_for_text_file (name, | |
| 934 eol_wrap); | |
| 935 if (NILP (coding_system)) | |
| 936 invalid_argument ("No such coding system", name); | |
| 937 return coding_system; | |
| 938 } | |
| 939 | |
| 940 /* We store the coding systems in hash tables with the names as the | |
| 941 key and the actual coding system object as the value. Occasionally | |
| 942 we need to use them in a list format. These routines provide us | |
| 943 with that. */ | |
| 428 | 944 struct coding_system_list_closure |
| 945 { | |
| 946 Lisp_Object *coding_system_list; | |
| 771 | 947 int normal; |
| 948 int internal; | |
| 428 | 949 }; |
| 950 | |
| 951 static int | |
| 4303 | 952 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value, |
| 428 | 953 void *coding_system_list_closure) |
| 954 { | |
| 955 /* This function can GC */ | |
| 956 struct coding_system_list_closure *cscl = | |
| 957 (struct coding_system_list_closure *) coding_system_list_closure; | |
| 958 Lisp_Object *coding_system_list = cscl->coding_system_list; | |
| 959 | |
| 771 | 960 /* We can't just use VALUE because KEY might be an alias, and we need |
| 4303 | 961 the real coding system object. |
| 962 | |
| 963 Autoloaded coding systems have conses for their values, and can't be | |
| 964 internal coding systems, or coding system aliases. */ | |
| 965 if (CONSP (value) || | |
| 966 (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ? | |
| 967 cscl->internal : cscl->normal)) | |
| 771 | 968 *coding_system_list = Fcons (key, *coding_system_list); |
| 428 | 969 return 0; |
| 970 } | |
| 971 | |
| 2297 | 972 /* #### should we specify a conventional for "all coding systems"? */ |
| 771 | 973 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /* |
| 428 | 974 Return a list of the names of all defined coding systems. |
| 771 | 975 If INTERNAL is nil, only the normal (non-internal) coding systems are |
| 976 included. (Internal coding systems are created for various internal | |
| 977 purposes, such as implementing EOL types of CRLF and CR; generally, you do | |
| 978 not want to see these.) If it is t, only the internal coding systems are | |
| 979 included. If it is any other non-nil value both normal and internal are | |
| 980 included. | |
| 428 | 981 */ |
| 771 | 982 (internal)) |
| 428 | 983 { |
| 984 Lisp_Object coding_system_list = Qnil; | |
| 985 struct gcpro gcpro1; | |
| 986 struct coding_system_list_closure coding_system_list_closure; | |
| 987 | |
| 988 GCPRO1 (coding_system_list); | |
| 989 coding_system_list_closure.coding_system_list = &coding_system_list; | |
| 771 | 990 coding_system_list_closure.normal = !EQ (internal, Qt); |
| 991 coding_system_list_closure.internal = !NILP (internal); | |
| 428 | 992 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table, |
| 993 &coding_system_list_closure); | |
| 994 UNGCPRO; | |
| 995 | |
| 996 return coding_system_list; | |
| 997 } | |
| 998 | |
| 999 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /* | |
| 1000 Return the name of the given coding system. | |
| 1001 */ | |
| 1002 (coding_system)) | |
| 1003 { | |
| 1004 coding_system = Fget_coding_system (coding_system); | |
| 1005 return XCODING_SYSTEM_NAME (coding_system); | |
| 1006 } | |
| 1007 | |
| 1008 static Lisp_Coding_System * | |
| 771 | 1009 allocate_coding_system (struct coding_system_methods *codesys_meths, |
| 1010 Bytecount data_size, | |
| 1011 Lisp_Object name) | |
| 428 | 1012 { |
| 771 | 1013 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size; |
| 428 | 1014 Lisp_Coding_System *codesys = |
| 3024 | 1015 (Lisp_Coding_System *) BASIC_ALLOC_LCRECORD (total_size, |
| 1204 | 1016 &lrecord_coding_system); |
| 1017 | |
| 771 | 1018 codesys->methods = codesys_meths; |
| 1204 | 1019 #define MARKED_SLOT(x) codesys->x = Qnil; |
| 1020 #include "coding-system-slots.h" | |
| 1021 | |
| 771 | 1022 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF; |
| 1023 CODING_SYSTEM_NAME (codesys) = name; | |
| 1024 | |
| 1025 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys))); | |
| 428 | 1026 |
| 1027 return codesys; | |
| 1028 } | |
| 1029 | |
| 771 | 1030 static enum eol_type |
| 1031 symbol_to_eol_type (Lisp_Object symbol) | |
| 1032 { | |
| 1033 CHECK_SYMBOL (symbol); | |
| 1034 if (NILP (symbol)) return EOL_AUTODETECT; | |
| 1035 if (EQ (symbol, Qlf)) return EOL_LF; | |
| 1036 if (EQ (symbol, Qcrlf)) return EOL_CRLF; | |
| 1037 if (EQ (symbol, Qcr)) return EOL_CR; | |
| 1038 | |
| 1039 invalid_constant ("Unrecognized eol type", symbol); | |
| 1204 | 1040 RETURN_NOT_REACHED (EOL_AUTODETECT); |
| 771 | 1041 } |
| 1042 | |
| 1043 static Lisp_Object | |
| 1044 eol_type_to_symbol (enum eol_type type) | |
| 1045 { | |
| 1046 switch (type) | |
| 1047 { | |
| 2500 | 1048 default: ABORT (); |
| 771 | 1049 case EOL_LF: return Qlf; |
| 1050 case EOL_CRLF: return Qcrlf; | |
| 1051 case EOL_CR: return Qcr; | |
| 1052 case EOL_AUTODETECT: return Qnil; | |
| 1053 } | |
| 1054 } | |
| 1055 | |
| 1056 struct subsidiary_type | |
| 1057 { | |
|
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1058 const Ascbyte *extension; |
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1059 const Ascbyte *mnemonic_ext; |
| 771 | 1060 enum eol_type eol; |
| 1061 }; | |
| 1062 | |
| 1063 static struct subsidiary_type coding_subsidiary_list[] = | |
| 1064 { { "-unix", "", EOL_LF }, | |
| 1065 { "-dos", ":T", EOL_CRLF }, | |
| 1066 { "-mac", ":t", EOL_CR } }; | |
| 1067 | |
| 1068 /* kludge */ | |
| 428 | 1069 static void |
| 771 | 1070 setup_eol_coding_systems (Lisp_Object codesys) |
| 428 | 1071 { |
| 793 | 1072 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name); |
| 2367 | 1073 Ibyte *codesys_name = alloca_ibytes (len + 7); |
| 771 | 1074 int mlen = -1; |
| 867 | 1075 Ibyte *codesys_mnemonic = 0; |
| 771 | 1076 Lisp_Object codesys_name_sym, sub_codesys; |
| 1077 int i; | |
| 1078 | |
| 1079 memcpy (codesys_name, | |
| 793 | 1080 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len); |
| 771 | 1081 |
| 1082 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys))) | |
| 428 | 1083 { |
| 771 | 1084 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys)); |
| 2367 | 1085 codesys_mnemonic = alloca_ibytes (mlen + 7); |
| 771 | 1086 memcpy (codesys_mnemonic, |
| 1087 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen); | |
| 1088 } | |
| 1089 | |
| 1090 /* Create three "subsidiary" coding systems, decoding data encoded using | |
| 1091 each of the three EOL types. We do this for each subsidiary by | |
| 1092 copying the original coding system, setting the EOL type | |
| 1093 appropriately, and setting the CANONICAL member of the new coding | |
| 1094 system to be a chain consisting of the original coding system followed | |
| 1095 by a convert-eol coding system to do the EOL decoding. For EOL type | |
| 1096 LF, however, we don't need any decoding, so we skip creating a | |
| 1097 CANONICAL. | |
| 1098 | |
| 1099 If the original coding system is not a text-type coding system | |
| 1100 (decodes byte->char), we need to coerce it to one by the appropriate | |
| 1101 wrapping in CANONICAL. */ | |
| 1102 | |
| 1103 for (i = 0; i < countof (coding_subsidiary_list); i++) | |
| 1104 { | |
|
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1105 const Ascbyte *extension = coding_subsidiary_list[i].extension; |
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1106 const Ascbyte *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext; |
| 771 | 1107 enum eol_type eol = coding_subsidiary_list[i].eol; |
| 1108 | |
| 2367 | 1109 qxestrcpy_ascii (codesys_name + len, extension); |
| 771 | 1110 codesys_name_sym = intern_int (codesys_name); |
| 1111 if (mlen != -1) | |
| 2367 | 1112 qxestrcpy_ascii (codesys_mnemonic + mlen, mnemonic_ext); |
| 771 | 1113 |
| 1114 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym); | |
| 1115 if (mlen != -1) | |
| 1116 XCODING_SYSTEM_MNEMONIC (sub_codesys) = | |
| 1117 build_intstring (codesys_mnemonic); | |
| 1118 | |
| 1119 if (eol != EOL_LF) | |
| 1120 { | |
| 1121 Lisp_Object chain = list2 (get_coding_system_for_text_file | |
| 1122 (codesys, 0), | |
| 1123 eol == EOL_CR ? Qconvert_eol_cr : | |
| 1124 Qconvert_eol_crlf); | |
| 1125 Lisp_Object canon = | |
| 1126 make_internal_coding_system | |
| 1127 (sub_codesys, "internal-subsidiary-eol-wrapper", | |
| 1128 Qchain, Qunbound, | |
| 1129 mlen != -1 ? | |
| 1130 list6 (Qmnemonic, build_intstring (codesys_mnemonic), | |
| 1131 Qchain, chain, | |
| 1132 Qcanonicalize_after_coding, sub_codesys) : | |
| 1133 list4 (Qchain, chain, | |
| 1134 Qcanonicalize_after_coding, sub_codesys)); | |
| 1135 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon; | |
| 1136 } | |
| 1137 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol; | |
| 1138 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys; | |
| 1139 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys; | |
| 428 | 1140 } |
| 1141 } | |
| 1142 | |
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1143 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, |
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1144 1, 1, 0, /* |
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1145 Return t if OBJECT names a coding system, and is not a coding system alias. |
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1146 */ |
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1147 (object)) |
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1148 { |
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1149 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil)) |
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1150 ? Qt : Qnil; |
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1151 } |
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1152 |
| 771 | 1153 /* Basic function to create new coding systems. For `make-coding-system', |
| 1154 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE, | |
| 1155 DESCRIPTION, and PROPS are the same. All created coding systems are put | |
| 1156 in a hash table indexed by NAME. | |
| 1157 | |
| 1158 If PREFIX is a string, NAME-OR-EXISTING should specify an existing | |
| 1159 coding system (or nil), and an internal coding system will be created. | |
| 1160 The name of the coding system will be constructed by combining PREFIX | |
| 1161 with the name of the existing coding system (if given), and a number | |
| 1162 will be appended to insure uniqueness. In such a case, if Qunbound is | |
| 1163 given for DESCRIPTION, the description gets created based on the | |
| 1164 generated name. Also, if no mnemonic is given in the properties list, a | |
| 1165 mnemonic is created based on the generated name. | |
| 1166 | |
| 1167 For internal coding systems, the coding system is marked as internal | |
| 1168 (see `coding-system-list'), and no subsidiaries will be created or | |
| 1169 eol-wrapping will happen. Otherwise: | |
| 1170 | |
| 1171 -- if the eol-type property is `lf' or t, the coding system is merely | |
| 1172 created and returned. (For t, the coding system will be wrapped with | |
| 1173 an EOL autodetector when it's used to read a file.) | |
| 1174 | |
| 1175 -- if eol-type is `crlf' or `cr', after the coding system object is | |
| 1176 created, it will be wrapped in a chain with the appropriate | |
| 1177 convert-eol coding system (either `convert-eol-crlf' or | |
| 1178 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at | |
| 1179 decoding time, and the opposite at encoding time. The resulting | |
| 1180 chain becomes the CANONICAL field of the coding system object. | |
| 1181 | |
| 1182 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three | |
| 1183 coding systems where the original coding system (before wrapping with | |
| 1184 convert-eol-autodetect) is either unwrapped or wrapped with | |
| 1185 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems | |
| 1186 to handle LF, CRLF, and CR end-of-line indicators are created. (This | |
| 1187 crazy crap is based on existing behavior in other Mule versions, | |
| 1188 including FSF Emacs.) | |
| 1189 */ | |
| 428 | 1190 |
| 1191 static Lisp_Object | |
|
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1192 make_coding_system_1 (Lisp_Object name_or_existing, const Ascbyte *prefix, |
| 771 | 1193 Lisp_Object type, Lisp_Object description, |
| 1194 Lisp_Object props) | |
| 428 | 1195 { |
| 771 | 1196 Lisp_Coding_System *cs; |
| 1197 int need_to_setup_eol_systems = 1; | |
| 1198 enum eol_type eol_wrapper = EOL_AUTODETECT; | |
| 1199 struct coding_system_methods *meths; | |
| 1200 Lisp_Object csobj; | |
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1201 Lisp_Object defmnem = Qnil, aliases = Qnil; |
| 771 | 1202 |
| 1203 if (NILP (type)) | |
| 1204 type = Qundecided; | |
| 1205 meths = decode_coding_system_type (type, ERROR_ME); | |
| 1206 | |
| 1207 if (prefix) | |
| 428 | 1208 { |
| 867 | 1209 Ibyte *newname = |
| 771 | 1210 emacs_sprintf_malloc (NULL, "%s-%s-%d", |
| 1211 prefix, | |
| 867 | 1212 NILP (name_or_existing) ? (Ibyte *) "nil" : |
| 771 | 1213 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME |
| 1214 (name_or_existing))), | |
| 1215 ++coding_system_tick); | |
| 1216 name_or_existing = intern_int (newname); | |
| 1726 | 1217 xfree (newname, Ibyte *); |
| 771 | 1218 |
| 1219 if (UNBOUNDP (description)) | |
| 1220 { | |
| 1221 newname = | |
| 1222 emacs_sprintf_malloc | |
| 1223 (NULL, "For Internal Use (%s)", | |
| 1224 XSTRING_DATA (Fsymbol_name (name_or_existing))); | |
| 1225 description = build_intstring (newname); | |
| 1726 | 1226 xfree (newname, Ibyte *); |
| 771 | 1227 } |
| 1228 | |
| 1229 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick); | |
| 1230 defmnem = build_intstring (newname); | |
| 1726 | 1231 xfree (newname, Ibyte *); |
| 428 | 1232 } |
| 771 | 1233 else |
| 1234 CHECK_SYMBOL (name_or_existing); | |
| 1235 | |
| 4303 | 1236 /* See is there an entry for name_or_existing in the defined coding system |
| 1237 hash table. */ | |
| 1238 csobj = find_coding_system (name_or_existing, 0); | |
| 1239 /* Error if it's there and not an autoload form. */ | |
| 1240 if (!NILP (csobj) && !CONSP (csobj)) | |
| 771 | 1241 invalid_operation ("Cannot redefine existing coding system", |
| 4303 | 1242 name_or_existing); |
| 771 | 1243 |
| 1244 cs = allocate_coding_system (meths, meths->extra_data_size, | |
| 1245 name_or_existing); | |
| 793 | 1246 csobj = wrap_coding_system (cs); |
| 771 | 1247 |
| 1248 cs->internal_p = !!prefix; | |
| 1249 | |
| 1250 if (NILP (description)) | |
| 1251 description = build_string (""); | |
| 1252 else | |
| 1253 CHECK_STRING (description); | |
| 1254 CODING_SYSTEM_DESCRIPTION (cs) = description; | |
| 1255 | |
| 1256 if (!NILP (defmnem)) | |
| 1257 CODING_SYSTEM_MNEMONIC (cs) = defmnem; | |
| 1258 | |
| 1259 { | |
| 1260 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props) | |
| 1261 { | |
| 1262 int recognized = 1; | |
| 1263 | |
| 1264 if (EQ (key, Qmnemonic)) | |
| 1265 { | |
| 1266 if (!NILP (value)) | |
| 1267 CHECK_STRING (value); | |
| 1268 CODING_SYSTEM_MNEMONIC (cs) = value; | |
| 1269 } | |
| 1270 | |
| 1271 else if (EQ (key, Qdocumentation)) | |
| 1272 { | |
| 1273 if (!NILP (value)) | |
| 1274 CHECK_STRING (value); | |
| 1275 CODING_SYSTEM_DOCUMENTATION (cs) = value; | |
| 1276 } | |
| 1277 | |
| 1278 else if (EQ (key, Qeol_type)) | |
| 1279 { | |
| 1280 need_to_setup_eol_systems = NILP (value); | |
| 1281 if (EQ (value, Qt)) | |
| 1282 value = Qnil; | |
| 1283 eol_wrapper = symbol_to_eol_type (value); | |
| 1284 } | |
| 1285 | |
| 1286 else if (EQ (key, Qpost_read_conversion)) | |
| 1287 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value; | |
| 1288 else if (EQ (key, Qpre_write_conversion)) | |
| 1289 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value; | |
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1290 else if (EQ (key, Qaliases)) |
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1291 { |
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1292 EXTERNAL_LIST_LOOP_2 (alias, value) |
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1293 { |
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1294 CHECK_SYMBOL (alias); |
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1295 |
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1296 if (!NILP (Fcoding_system_canonical_name_p (alias))) |
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1297 { |
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1298 invalid_change ("Symbol is the canonical name of a " |
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1299 "coding system and cannot be redefined", |
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1300 alias); |
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1301 } |
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1302 } |
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1303 aliases = value; |
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1304 } |
| 771 | 1305 /* FSF compatibility */ |
| 1306 else if (EQ (key, Qtranslation_table_for_decode)) | |
| 1307 ; | |
| 1308 else if (EQ (key, Qtranslation_table_for_encode)) | |
| 1309 ; | |
| 1310 else if (EQ (key, Qsafe_chars)) | |
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1311 { |
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1312 CHECK_CHAR_TABLE (value); |
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1313 CODING_SYSTEM_SAFE_CHARS (cs) = value; |
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1314 } |
| 771 | 1315 else if (EQ (key, Qsafe_charsets)) |
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1316 { |
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1317 if (!EQ (Qt, value) |
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1318 /* Would be nice to actually do this check, but there are |
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1319 some order conflicts with japanese.el and |
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1320 mule-coding.el */ |
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1321 && 0) |
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1322 { |
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1323 #ifdef MULE |
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1324 EXTERNAL_LIST_LOOP_2 (safe_charset, value) |
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1325 CHECK_CHARSET (Ffind_charset (safe_charset)); |
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1326 #endif |
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1327 } |
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1328 |
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1329 CODING_SYSTEM_SAFE_CHARSETS (cs) = value; |
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1330 } |
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1331 else if (EQ (key, Qcategory)) |
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1332 { |
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1333 Fput (name_or_existing, intern ("coding-system-property"), |
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1334 Fplist_put (Fget (name_or_existing, |
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1335 intern ("coding-system-property"), |
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1336 Qnil), |
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1337 Qcategory, value)); |
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1338 } |
| 771 | 1339 else if (EQ (key, Qmime_charset)) |
| 1340 ; | |
| 1341 else if (EQ (key, Qvalid_codes)) | |
| 1342 ; | |
| 1343 else | |
| 1344 recognized = CODESYSMETH_OR_GIVEN (cs, putprop, | |
| 1345 (csobj, key, value), 0); | |
| 1346 | |
| 1347 if (!recognized) | |
| 1348 invalid_constant ("Unrecognized property", key); | |
| 1349 } | |
| 1350 } | |
| 1351 | |
| 1352 { | |
| 1353 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 1354 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil); | |
| 1355 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system | |
| 1356 below */ | |
| 1357 | |
| 4303 | 1358 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table); |
| 1359 | |
| 771 | 1360 if (need_to_setup_eol_systems && !cs->internal_p) |
| 1361 setup_eol_coding_systems (csobj); | |
| 1362 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF) | |
| 1363 { | |
| 1364 /* If a specific eol-type (other than LF) was specified, we handle | |
| 1365 this by converting the coding system into a chain that wraps the | |
| 1366 coding system along with a convert-eol system after it, in | |
| 1367 exactly that same switcheroo fashion that the normal | |
| 1368 canonicalize method works -- BUT we will run into a problem if | |
| 1369 we do it the obvious way, because when `chain' creates its | |
| 1370 substreams, the substream containing the coding system we're | |
| 1371 creating will have canonicalization expansion done on it, | |
| 1372 leading to infinite recursion. So we have to generate a new, | |
| 1373 internal coding system with the previous value of CANONICAL. */ | |
| 867 | 1374 Ibyte *newname = |
| 771 | 1375 emacs_sprintf_malloc |
| 1376 (NULL, "internal-eol-copy-%s-%d", | |
| 1377 XSTRING_DATA (Fsymbol_name (name_or_existing)), | |
| 1378 ++coding_system_tick); | |
| 1379 Lisp_Object newnamesym = intern_int (newname); | |
| 1380 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym); | |
| 1726 | 1381 xfree (newname, Ibyte *); |
| 771 | 1382 |
| 1383 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 1384 make_internal_coding_system | |
| 1385 (csobj, | |
| 1386 "internal-eol-wrapper", | |
| 1387 Qchain, Qunbound, | |
| 1388 list4 (Qchain, | |
| 1389 list2 (copied, | |
| 1390 eol_wrapper == EOL_CR ? | |
| 1391 Qconvert_eol_cr : | |
| 1392 Qconvert_eol_crlf), | |
| 1393 Qcanonicalize_after_coding, | |
| 1394 csobj)); | |
| 1395 } | |
| 1396 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper; | |
|
4690
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1397 |
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1398 { |
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1399 EXTERNAL_LIST_LOOP_2 (alias, aliases) |
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1400 Fdefine_coding_system_alias (alias, csobj); |
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1401 } |
| 771 | 1402 } |
| 1403 | |
| 1404 return csobj; | |
| 428 | 1405 } |
| 1406 | |
| 771 | 1407 Lisp_Object |
|
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1408 make_internal_coding_system (Lisp_Object existing, const Ascbyte *prefix, |
| 771 | 1409 Lisp_Object type, Lisp_Object description, |
| 1410 Lisp_Object props) | |
| 1411 { | |
| 1412 return make_coding_system_1 (existing, prefix, type, description, props); | |
| 1413 } | |
| 428 | 1414 |
|
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1415 DEFUN ("make-coding-system-internal", Fmake_coding_system_internal, 2, 4, 0, /* |
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1416 See `make-coding-system'. This does much of the work of that function. |
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1417 |
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1418 Without Mule support, it does all the work of that function, and an alias |
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1419 exists, mapping `make-coding-system' to |
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1420 `make-coding-system-internal'. You'll need a non-Mule XEmacs to read the |
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1421 complete docstring. Or you can just read it in make-coding-system.el; |
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1422 something like the following should work: |
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1423 |
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1424 \\[find-function-other-window] find-file RET \\[find-file] mule/make-coding-system.el RET |
| 771 | 1425 |
| 428 | 1426 */ |
| 771 | 1427 (name, type, description, props)) |
| 428 | 1428 { |
| 771 | 1429 return make_coding_system_1 (name, 0, type, description, props); |
| 428 | 1430 } |
| 1431 | |
| 1432 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /* | |
| 1433 Copy OLD-CODING-SYSTEM to NEW-NAME. | |
| 1434 If NEW-NAME does not name an existing coding system, a new one will | |
| 1435 be created. | |
| 771 | 1436 If you are using this function to create an alias, think again: |
| 1437 Use `define-coding-system-alias' instead. | |
| 428 | 1438 */ |
| 1439 (old_coding_system, new_name)) | |
| 1440 { | |
| 1441 Lisp_Object new_coding_system; | |
| 1442 old_coding_system = Fget_coding_system (old_coding_system); | |
| 771 | 1443 new_coding_system = |
| 4303 | 1444 UNBOUNDP (new_name) ? Qnil : find_coding_system (new_name, 0); |
| 428 | 1445 if (NILP (new_coding_system)) |
| 1446 { | |
| 793 | 1447 new_coding_system = |
| 1448 wrap_coding_system | |
| 1449 (allocate_coding_system | |
| 1450 (XCODING_SYSTEM (old_coding_system)->methods, | |
| 1451 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size, | |
| 1452 new_name)); | |
| 771 | 1453 if (!UNBOUNDP (new_name)) |
| 1454 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table); | |
| 428 | 1455 } |
| 771 | 1456 else if (XCODING_SYSTEM (old_coding_system)->methods != |
| 1457 XCODING_SYSTEM (new_coding_system)->methods) | |
| 1458 invalid_operation_2 ("Coding systems not same type", | |
| 1459 old_coding_system, new_coding_system); | |
| 428 | 1460 |
| 1461 { | |
| 1462 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system); | |
| 1463 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system); | |
| 3017 | 1464 COPY_SIZED_LCRECORD (to, from, sizeof_coding_system (from)); |
| 428 | 1465 to->name = new_name; |
| 1466 } | |
| 1467 return new_coding_system; | |
| 1468 } | |
| 1469 | |
| 2297 | 1470 /* #### Shouldn't this really be a find/get pair? */ |
| 1471 | |
| 440 | 1472 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /* |
| 1473 Return t if OBJECT is a coding system alias. | |
| 1474 All coding system aliases are created by `define-coding-system-alias'. | |
| 1475 */ | |
| 1476 (object)) | |
| 428 | 1477 { |
| 440 | 1478 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero)) |
| 1479 ? Qt : Qnil; | |
| 1480 } | |
| 1481 | |
| 1482 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /* | |
| 1483 Return the coding-system symbol for which symbol ALIAS is an alias. | |
| 1484 */ | |
| 1485 (alias)) | |
| 1486 { | |
| 1487 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil); | |
| 1488 if (SYMBOLP (aliasee)) | |
| 1489 return aliasee; | |
| 1490 else | |
| 563 | 1491 invalid_argument ("Symbol is not a coding system alias", alias); |
| 1204 | 1492 RETURN_NOT_REACHED (Qnil); |
| 440 | 1493 } |
| 1494 | |
| 1495 /* A maphash function, for removing dangling coding system aliases. */ | |
| 1496 static int | |
| 2286 | 1497 dangling_coding_system_alias_p (Lisp_Object UNUSED (alias), |
| 440 | 1498 Lisp_Object aliasee, |
| 1499 void *dangling_aliases) | |
| 1500 { | |
| 1501 if (SYMBOLP (aliasee) | |
| 1502 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil))) | |
| 428 | 1503 { |
| 440 | 1504 (*(int *) dangling_aliases)++; |
| 1505 return 1; | |
| 428 | 1506 } |
| 440 | 1507 else |
| 1508 return 0; | |
| 1509 } | |
| 1510 | |
| 1511 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /* | |
| 1512 Define symbol ALIAS as an alias for coding system ALIASEE. | |
| 1513 | |
| 1514 You can use this function to redefine an alias that has already been defined, | |
| 1515 but you cannot redefine a name which is the canonical name for a coding system. | |
| 1516 \(a canonical name of a coding system is what is returned when you call | |
| 1517 `coding-system-name' on a coding system). | |
| 1518 | |
| 1519 ALIASEE itself can be an alias, which allows you to define nested aliases. | |
| 1520 | |
| 1521 You are forbidden, however, from creating alias loops or `dangling' aliases. | |
| 1522 These will be detected, and an error will be signaled if you attempt to do so. | |
| 1523 | |
| 1524 If ALIASEE is nil, then ALIAS will simply be undefined. | |
| 1525 | |
| 1526 See also `coding-system-alias-p', `coding-system-aliasee', | |
| 1527 and `coding-system-canonical-name-p'. | |
| 1528 */ | |
| 1529 (alias, aliasee)) | |
| 1530 { | |
| 2286 | 1531 Lisp_Object probe; |
| 440 | 1532 |
| 1533 CHECK_SYMBOL (alias); | |
| 1534 | |
| 1535 if (!NILP (Fcoding_system_canonical_name_p (alias))) | |
| 563 | 1536 invalid_change |
| 440 | 1537 ("Symbol is the canonical name of a coding system and cannot be redefined", |
| 1538 alias); | |
| 1539 | |
| 1540 if (NILP (aliasee)) | |
| 1541 { | |
| 771 | 1542 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix"); |
| 1543 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos"); | |
| 1544 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac"); | |
| 440 | 1545 |
| 1546 Fremhash (alias, Vcoding_system_hash_table); | |
| 1547 | |
| 1548 /* Undefine subsidiary aliases, | |
| 1549 presumably created by a previous call to this function */ | |
| 1550 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) && | |
| 1551 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) && | |
| 1552 ! NILP (Fcoding_system_alias_p (subsidiary_mac))) | |
| 1553 { | |
| 1554 Fdefine_coding_system_alias (subsidiary_unix, Qnil); | |
| 1555 Fdefine_coding_system_alias (subsidiary_dos, Qnil); | |
| 1556 Fdefine_coding_system_alias (subsidiary_mac, Qnil); | |
| 1557 } | |
| 1558 | |
| 1559 /* Undefine dangling coding system aliases. */ | |
| 1560 { | |
| 1561 int dangling_aliases; | |
| 1562 | |
| 1563 do { | |
| 1564 dangling_aliases = 0; | |
| 1565 elisp_map_remhash (dangling_coding_system_alias_p, | |
| 1566 Vcoding_system_hash_table, | |
| 1567 &dangling_aliases); | |
| 1568 } while (dangling_aliases > 0); | |
| 1569 } | |
| 1570 | |
| 1571 return Qnil; | |
| 1572 } | |
| 1573 | |
| 1574 if (CODING_SYSTEMP (aliasee)) | |
| 1575 aliasee = XCODING_SYSTEM_NAME (aliasee); | |
| 1576 | |
| 1577 /* Checks that aliasee names a coding-system */ | |
| 2286 | 1578 (void) Fget_coding_system (aliasee); |
| 440 | 1579 |
| 1580 /* Check for coding system alias loops */ | |
| 1581 if (EQ (alias, aliasee)) | |
| 563 | 1582 alias_loop: invalid_operation_2 |
| 440 | 1583 ("Attempt to create a coding system alias loop", alias, aliasee); |
| 1584 | |
| 1585 for (probe = aliasee; | |
| 1586 SYMBOLP (probe); | |
| 1587 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero)) | |
| 1588 { | |
| 1589 if (EQ (probe, alias)) | |
| 1590 goto alias_loop; | |
| 1591 } | |
| 1592 | |
| 1593 Fputhash (alias, aliasee, Vcoding_system_hash_table); | |
| 1594 | |
| 1595 /* Set up aliases for subsidiaries. | |
| 2297 | 1596 #### There must be a better way to handle subsidiary coding systems. |
| 1597 Inquiring Minds Want To Know: shouldn't they always be chains? */ | |
| 440 | 1598 { |
| 1599 static const char *suffixes[] = { "-unix", "-dos", "-mac" }; | |
| 1600 int i; | |
| 1601 for (i = 0; i < countof (suffixes); i++) | |
| 1602 { | |
| 1603 Lisp_Object alias_subsidiary = | |
| 771 | 1604 add_suffix_to_symbol (alias, suffixes[i]); |
| 440 | 1605 Lisp_Object aliasee_subsidiary = |
| 771 | 1606 add_suffix_to_symbol (aliasee, suffixes[i]); |
| 440 | 1607 |
| 1608 if (! NILP (Ffind_coding_system (aliasee_subsidiary))) | |
| 1609 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary); | |
| 1610 } | |
| 1611 } | |
| 428 | 1612 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac], |
| 1613 but it doesn't look intentional, so I'd rather return something | |
| 1614 meaningful or nothing at all. */ | |
| 1615 return Qnil; | |
| 1616 } | |
| 1617 | |
| 1618 static Lisp_Object | |
| 771 | 1619 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type) |
| 428 | 1620 { |
| 1621 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 1622 Lisp_Object new_coding_system; | |
| 1623 | |
| 1624 switch (type) | |
| 1625 { | |
| 1626 case EOL_AUTODETECT: return coding_system; | |
| 1627 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break; | |
| 1628 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break; | |
| 1629 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break; | |
| 2500 | 1630 default: ABORT (); return Qnil; |
| 428 | 1631 } |
| 1632 | |
| 1633 return NILP (new_coding_system) ? coding_system : new_coding_system; | |
| 1634 } | |
| 1635 | |
| 1636 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /* | |
| 1637 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE. | |
| 771 | 1638 The logically opposite operation is `coding-system-base'. |
| 428 | 1639 */ |
| 1640 (coding_system, eol_type)) | |
| 1641 { | |
| 771 | 1642 coding_system = get_coding_system_for_text_file (coding_system, 0); |
| 428 | 1643 |
| 1644 return subsidiary_coding_system (coding_system, | |
| 1645 symbol_to_eol_type (eol_type)); | |
| 1646 } | |
| 1647 | |
| 771 | 1648 DEFUN ("coding-system-base", Fcoding_system_base, |
| 1649 1, 1, 0, /* | |
| 1650 Return the base coding system of CODING-SYSTEM. | |
| 1651 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it | |
| 1652 returns CODING-SYSTEM. | |
| 1653 The logically opposite operation is `subsidiary-coding-system'. | |
| 1654 */ | |
| 1655 (coding_system)) | |
| 1656 { | |
| 1657 Lisp_Object base; | |
| 1658 | |
| 1659 coding_system = Fget_coding_system (coding_system); | |
| 1660 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary)) | |
| 1661 return Fget_coding_system (Qraw_text); /* hack! */ | |
| 1662 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system); | |
| 1663 if (!NILP (base)) | |
| 1664 return base; | |
| 1665 return coding_system; | |
| 1666 } | |
| 1667 | |
| 1668 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io, | |
| 1669 1, 1, 0, /* | |
| 1670 Return the coding system actually used for I/O. | |
| 1671 In some cases (e.g. when a particular EOL type is specified) this won't be | |
| 2297 | 1672 the coding system itself. This can be useful when trying to determine |
| 1673 precisely how data was decoded. | |
| 771 | 1674 */ |
| 1675 (coding_system)) | |
| 1676 { | |
| 1677 Lisp_Object canon; | |
| 1678 | |
| 1679 coding_system = Fget_coding_system (coding_system); | |
| 1680 canon = XCODING_SYSTEM_CANONICAL (coding_system); | |
| 1681 if (!NILP (canon)) | |
| 1682 return canon; | |
| 1683 return coding_system; | |
| 1684 } | |
| 1685 | |
| 428 | 1686 |
| 1687 /************************************************************************/ | |
| 1688 /* Coding system accessors */ | |
| 1689 /************************************************************************/ | |
| 1690 | |
| 771 | 1691 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /* |
| 1692 Return the description for CODING-SYSTEM. | |
| 1693 The `description' of a coding system is a short English phrase giving the | |
| 1694 name rendered according to English punctuation rules, plus possibly some | |
| 1695 explanatory text (typically in the form of a parenthetical phrase). The | |
| 1696 description is intended to be short enough that it can appear as a menu item, | |
| 1697 and clear enough to be recognizable even to someone who is assumed to have | |
| 1698 some basic familiarity with different encodings but may not know all the | |
| 1699 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and | |
| 1700 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of | |
| 1701 the encoding is given, followed by a note that this is a Chinese encoding, | |
| 1702 because the great majority of people encountering this would have no idea | |
| 1703 what it is, and giving the language indicates whether the encoding should | |
| 1704 just be ignored or (conceivably) investigated more thoroughly. | |
| 428 | 1705 */ |
| 1706 (coding_system)) | |
| 1707 { | |
| 1708 coding_system = Fget_coding_system (coding_system); | |
| 771 | 1709 return XCODING_SYSTEM_DESCRIPTION (coding_system); |
| 428 | 1710 } |
| 1711 | |
| 1712 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /* | |
| 1713 Return the type of CODING-SYSTEM. | |
| 1714 */ | |
| 1715 (coding_system)) | |
| 1716 { | |
| 771 | 1717 coding_system = Fget_coding_system (coding_system); |
| 1718 return XCODING_SYSTEM_TYPE (coding_system); | |
| 428 | 1719 } |
| 1720 | |
| 1721 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /* | |
| 1722 Return the PROP property of CODING-SYSTEM. | |
| 1723 */ | |
| 1724 (coding_system, prop)) | |
| 1725 { | |
| 1726 coding_system = Fget_coding_system (coding_system); | |
| 1727 CHECK_SYMBOL (prop); | |
| 1728 | |
| 1729 if (EQ (prop, Qname)) | |
| 1730 return XCODING_SYSTEM_NAME (coding_system); | |
| 1731 else if (EQ (prop, Qtype)) | |
| 1732 return Fcoding_system_type (coding_system); | |
| 771 | 1733 else if (EQ (prop, Qdescription)) |
| 1734 return XCODING_SYSTEM_DESCRIPTION (coding_system); | |
| 428 | 1735 else if (EQ (prop, Qmnemonic)) |
| 1736 return XCODING_SYSTEM_MNEMONIC (coding_system); | |
| 771 | 1737 else if (EQ (prop, Qdocumentation)) |
| 1738 return XCODING_SYSTEM_DOCUMENTATION (coding_system); | |
| 428 | 1739 else if (EQ (prop, Qeol_type)) |
| 771 | 1740 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE |
| 1741 (coding_system)); | |
| 428 | 1742 else if (EQ (prop, Qeol_lf)) |
| 1743 return XCODING_SYSTEM_EOL_LF (coding_system); | |
| 1744 else if (EQ (prop, Qeol_crlf)) | |
| 1745 return XCODING_SYSTEM_EOL_CRLF (coding_system); | |
| 1746 else if (EQ (prop, Qeol_cr)) | |
| 1747 return XCODING_SYSTEM_EOL_CR (coding_system); | |
| 1748 else if (EQ (prop, Qpost_read_conversion)) | |
| 1749 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system); | |
| 1750 else if (EQ (prop, Qpre_write_conversion)) | |
| 1751 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system); | |
|
4568
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Add #'query-coding-region tests; do the work necessary to get them running.
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1752 else if (EQ (prop, Qsafe_charsets)) |
|
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1753 return XCODING_SYSTEM_SAFE_CHARSETS (coding_system); |
|
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Add #'query-coding-region tests; do the work necessary to get them running.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1754 else if (EQ (prop, Qsafe_chars)) |
|
1d74a1d115ee
Add #'query-coding-region tests; do the work necessary to get them running.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4303
diff
changeset
|
1755 return XCODING_SYSTEM_SAFE_CHARS (coding_system); |
| 771 | 1756 else |
| 1757 { | |
| 1758 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system), | |
| 1759 getprop, | |
| 1760 (coding_system, prop), | |
| 1761 Qunbound); | |
| 1762 if (UNBOUNDP (value)) | |
| 1763 invalid_constant ("Unrecognized property", prop); | |
| 1764 return value; | |
| 1765 } | |
| 1766 } | |
| 1767 | |
| 1768 | |
| 1769 /************************************************************************/ | |
| 1770 /* Coding stream functions */ | |
| 1771 /************************************************************************/ | |
| 1772 | |
| 1773 /* A coding stream is a stream used for encoding or decoding text. The | |
| 1774 coding-stream object keeps track of the actual coding system, the stream | |
| 1775 that is at the other end, and data that needs to be persistent across | |
| 1776 the lifetime of the stream. */ | |
| 1777 | |
| 1204 | 1778 extern const struct sized_memory_description chain_coding_stream_description; |
| 1779 extern const struct sized_memory_description undecided_coding_stream_description; | |
| 1780 | |
| 1781 static const struct memory_description coding_stream_data_description_1 []= { | |
| 2551 | 1782 { XD_BLOCK_PTR, chain_coding_system, 1, |
| 1783 { &chain_coding_stream_description } }, | |
| 1784 { XD_BLOCK_PTR, undecided_coding_system, 1, | |
| 1785 { &undecided_coding_stream_description } }, | |
| 1204 | 1786 { XD_END } |
| 1787 }; | |
| 1788 | |
| 1789 static const struct sized_memory_description coding_stream_data_description = { | |
| 1790 sizeof (void *), coding_stream_data_description_1 | |
| 1791 }; | |
| 1792 | |
| 1793 static const struct memory_description coding_lstream_description[] = { | |
| 1794 { XD_INT, offsetof (struct coding_stream, type) }, | |
| 1795 { XD_LISP_OBJECT, offsetof (struct coding_stream, orig_codesys) }, | |
| 1796 { XD_LISP_OBJECT, offsetof (struct coding_stream, codesys) }, | |
| 1797 { XD_LISP_OBJECT, offsetof (struct coding_stream, other_end) }, | |
| 1798 { XD_UNION, offsetof (struct coding_stream, data), | |
| 2551 | 1799 XD_INDIRECT (0, 0), { &coding_stream_data_description } }, |
| 1204 | 1800 { XD_END } |
| 1801 }; | |
| 1802 | |
| 1803 DEFINE_LSTREAM_IMPLEMENTATION_WITH_DATA ("coding", coding); | |
| 771 | 1804 |
| 1805 /* Encoding and decoding are parallel operations, so we create just one | |
| 1806 stream for both. "Decoding" may involve the extra step of autodetection | |
| 1807 of the data format, but that's only because of the conventional | |
| 1808 definition of decoding as converting from external- to | |
| 1809 internal-formatted data. | |
| 1810 | |
| 2297 | 1811 [[ REWRITE ME! ]] |
| 1812 | |
| 771 | 1813 #### We really need to abstract out the concept of "data formats" and |
| 1814 define "converters" that convert from and to specified formats, | |
| 1815 eliminating the idea of decoding and encoding. When specifying a | |
| 1816 conversion process, we need to give the data formats themselves, not the | |
| 1817 conversion processes -- e.g. a coding system called "Unicode->multibyte" | |
| 1818 converts in both directions, and we could auto-detect the format of data | |
| 1819 at either end. */ | |
| 1820 | |
| 1821 static Bytecount | |
| 1822 coding_reader (Lstream *stream, unsigned char *data, Bytecount size) | |
| 1823 { | |
| 1824 unsigned char *orig_data = data; | |
| 1825 Bytecount read_size; | |
| 1826 int error_occurred = 0; | |
| 1827 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1828 | |
| 1829 /* We need to interface to coding_{de,en}code_1(), which expects to take | |
| 1830 some amount of data and store the result into a Dynarr. We have | |
| 1831 coding_{de,en}code_1() store into c->runoff, and take data from there | |
| 1832 as necessary. */ | |
| 1833 | |
| 1834 /* We loop until we have enough data, reading chunks from the other | |
| 1835 end and converting it. */ | |
| 1836 while (1) | |
| 1837 { | |
| 1838 /* Take data from convert_to if we can. Make sure to take at | |
| 1839 most SIZE bytes, and delete the data from convert_to. */ | |
| 1840 if (Dynarr_length (str->convert_to) > 0) | |
| 1841 { | |
| 1842 Bytecount chunk = | |
| 1843 min (size, (Bytecount) Dynarr_length (str->convert_to)); | |
| 1844 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk); | |
| 1845 Dynarr_delete_many (str->convert_to, 0, chunk); | |
| 1846 data += chunk; | |
| 1847 size -= chunk; | |
| 1848 } | |
| 1849 | |
| 1850 if (size == 0) | |
| 1851 break; /* No more room for data */ | |
| 1852 | |
| 1853 if (str->eof) | |
| 1854 break; | |
| 1855 | |
| 1856 { | |
| 1857 /* Exhausted convert_to, so get some more. Read into convert_from, | |
| 1858 after existing "rejected" data from the last conversion. */ | |
| 1859 Bytecount rejected = Dynarr_length (str->convert_from); | |
| 1860 /* #### 1024 is arbitrary; we really need to separate 0 from EOF, | |
| 1861 and when we get 0, keep taking more data until we don't get 0 -- | |
| 1862 we don't know how much data the conversion routine might need | |
| 2297 | 1863 before it can generate any data of its own (eg, bzip2). */ |
| 814 | 1864 Bytecount readmore = |
| 1865 str->one_byte_at_a_time ? (Bytecount) 1 : | |
| 1866 max (size, (Bytecount) 1024); | |
| 771 | 1867 |
| 1868 Dynarr_add_many (str->convert_from, 0, readmore); | |
| 1869 read_size = Lstream_read (str->other_end, | |
| 1870 Dynarr_atp (str->convert_from, rejected), | |
| 1871 readmore); | |
| 1872 /* Trim size down to how much we actually got */ | |
| 1873 Dynarr_set_size (str->convert_from, rejected + max (0, read_size)); | |
| 1874 } | |
| 1875 | |
| 1876 if (read_size < 0) /* LSTREAM_ERROR */ | |
| 1877 { | |
| 1878 error_occurred = 1; | |
| 1879 break; | |
| 1880 } | |
| 1881 if (read_size == 0) /* LSTREAM_EOF */ | |
| 1882 /* There might be some more end data produced in the translation, | |
| 1883 so we set a flag and call the conversion method once more to | |
| 1884 output any final stuff it may be holding, any "go back to a sane | |
| 1885 state" escape sequences, etc. The conversion method is free to | |
| 1886 look at this flag, and we use it above to stop looping. */ | |
| 1887 str->eof = 1; | |
| 1888 { | |
| 1889 Bytecount processed; | |
| 1890 Bytecount to_process = Dynarr_length (str->convert_from); | |
| 1891 | |
| 1892 /* Convert the data, and save any rejected data in convert_from */ | |
| 1893 processed = | |
| 1894 XCODESYSMETH (str->codesys, convert, | |
| 1895 (str, Dynarr_atp (str->convert_from, 0), | |
| 1896 str->convert_to, to_process)); | |
| 1897 if (processed < 0) | |
| 1898 { | |
| 1899 error_occurred = 1; | |
| 1900 break; | |
| 1901 } | |
| 1902 assert (processed <= to_process); | |
| 1903 if (processed < to_process) | |
| 1904 memmove (Dynarr_atp (str->convert_from, 0), | |
| 1905 Dynarr_atp (str->convert_from, processed), | |
| 1906 to_process - processed); | |
| 1907 Dynarr_set_size (str->convert_from, to_process - processed); | |
| 1908 } | |
| 1909 } | |
| 1910 | |
| 1911 if (data - orig_data == 0) | |
| 1912 return error_occurred ? -1 : 0; | |
| 1913 else | |
| 1914 return data - orig_data; | |
| 1915 } | |
| 1916 | |
| 1917 static Bytecount | |
| 1918 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size) | |
| 1919 { | |
| 1920 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1921 | |
| 1922 /* Convert all our data into convert_to, and then attempt to write | |
| 1923 it all out to the other end. */ | |
| 1924 Dynarr_reset (str->convert_to); | |
| 1925 size = XCODESYSMETH (str->codesys, convert, | |
| 1926 (str, data, str->convert_to, size)); | |
| 1927 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0), | |
| 1928 Dynarr_length (str->convert_to)) < 0) | |
| 1929 return -1; | |
| 1930 else | |
| 1931 /* The return value indicates how much of the incoming data was | |
| 1932 processed, not how many bytes were written. */ | |
| 1933 return size; | |
| 1934 } | |
| 1935 | |
| 1936 static int | |
| 1937 encode_decode_source_sink_type_is_char (Lisp_Object cs, | |
| 1938 enum source_or_sink sex, | |
| 1939 enum encode_decode direction) | |
| 1940 { | |
| 1941 return (direction == CODING_DECODE ? | |
| 1942 decoding_source_sink_type_is_char (cs, sex) : | |
| 1943 encoding_source_sink_type_is_char (cs, sex)); | |
| 1944 } | |
| 1945 | |
| 1946 /* Ensure that the convert methods only get full characters sent to them to | |
| 1947 convert if the source of that conversion is characters; and that no such | |
| 1948 full-character checking happens when the source is bytes. Keep in mind | |
| 1949 that (1) the conversion_end_type return values take the perspective of | |
| 1950 encoding; (2) the source for decoding is the same as the sink for | |
| 1951 encoding; (3) when writing, the data is given to us, and we set our own | |
| 1952 stream to be character mode or not; (4) when reading, the data comes | |
| 1953 from the other_end stream, and we set that one to be character mode or | |
| 1954 not. This is consistent with the comment above the prototype for | |
| 1955 Lstream_set_character_mode(), which lays out rules for who is allowed to | |
| 1956 modify the character type mode on a stream. | |
| 1957 | |
| 814 | 1958 If we're a read stream, we're always setting character mode on the |
| 1959 source, but we also set it on ourselves consistent with the flag that | |
| 1960 can disable this (see again the comment above | |
| 1961 Lstream_set_character_mode()). | |
| 1962 */ | |
| 771 | 1963 |
| 1964 static void | |
| 1965 set_coding_character_mode (Lstream *stream) | |
| 1966 { | |
| 1967 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1968 Lstream *stream_to_set = | |
| 1969 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end; | |
| 1970 if (encode_decode_source_sink_type_is_char | |
| 1971 (str->codesys, CODING_SOURCE, str->direction)) | |
| 1972 Lstream_set_character_mode (stream_to_set); | |
| 1973 else | |
| 1974 Lstream_unset_character_mode (stream_to_set); | |
| 814 | 1975 if (str->set_char_mode_on_us_when_reading && |
| 1976 (stream->flags & LSTREAM_FL_READ)) | |
| 1977 { | |
| 1978 if (encode_decode_source_sink_type_is_char | |
| 1979 (str->codesys, CODING_SINK, str->direction)) | |
| 1980 Lstream_set_character_mode (stream); | |
| 1981 else | |
| 1982 Lstream_unset_character_mode (stream); | |
| 1983 } | |
| 771 | 1984 } |
| 1985 | |
| 1986 static Lisp_Object | |
| 1987 coding_marker (Lisp_Object stream) | |
| 1988 { | |
| 1989 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream)); | |
| 1990 | |
| 1991 mark_object (str->orig_codesys); | |
| 1992 mark_object (str->codesys); | |
| 1993 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str)); | |
| 1994 return wrap_lstream (str->other_end); | |
| 1995 } | |
| 1996 | |
| 1997 static int | |
| 1998 coding_rewinder (Lstream *stream) | |
| 1999 { | |
| 2000 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2001 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str)); | |
| 2002 | |
| 2003 str->ch = 0; | |
| 2004 Dynarr_reset (str->convert_to); | |
| 2005 Dynarr_reset (str->convert_from); | |
| 2006 return Lstream_rewind (str->other_end); | |
| 2007 } | |
| 2008 | |
| 2009 static int | |
| 2010 coding_seekable_p (Lstream *stream) | |
| 2011 { | |
| 2012 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2013 return Lstream_seekable_p (str->other_end); | |
| 2014 } | |
| 2015 | |
| 2016 static int | |
| 2017 coding_flusher (Lstream *stream) | |
| 2018 { | |
| 2019 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2020 return Lstream_flush (str->other_end); | |
| 2021 } | |
| 2022 | |
| 2023 static int | |
| 2024 coding_closer (Lstream *stream) | |
| 2025 { | |
| 2026 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2027 if (stream->flags & LSTREAM_FL_WRITE) | |
| 2028 { | |
| 2029 str->eof = 1; | |
| 2030 coding_writer (stream, 0, 0); | |
| 2031 str->eof = 0; | |
| 2032 } | |
| 2033 /* It's safe to free the runoff dynarrs now because they are used only | |
| 2034 during conversion. We need to keep the type-specific data around, | |
| 2035 though, because of canonicalize_after_coding. */ | |
| 2036 if (str->convert_to) | |
| 2037 { | |
| 2038 Dynarr_free (str->convert_to); | |
| 2039 str->convert_to = 0; | |
| 2040 } | |
| 2041 if (str->convert_from) | |
| 428 | 2042 { |
| 771 | 2043 Dynarr_free (str->convert_from); |
| 2044 str->convert_from = 0; | |
| 2045 } | |
| 2046 | |
| 800 | 2047 if (str->no_close_other) |
| 2048 return Lstream_flush (str->other_end); | |
| 2049 else | |
| 2050 return Lstream_close (str->other_end); | |
| 771 | 2051 } |
| 2052 | |
| 2053 static void | |
| 2054 coding_finalizer (Lstream *stream) | |
| 2055 { | |
| 2056 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2057 | |
| 2058 assert (!str->finalized); | |
| 2059 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2060 if (str->data) | |
| 2061 { | |
| 1726 | 2062 xfree (str->data, void *); |
| 771 | 2063 str->data = 0; |
| 2064 } | |
| 2065 str->finalized = 1; | |
| 2066 } | |
| 2067 | |
| 2068 static Lisp_Object | |
| 2069 coding_stream_canonicalize_after_coding (Lstream *stream) | |
| 2070 { | |
| 2071 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2072 | |
| 2073 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding, | |
| 2074 (str), str->codesys); | |
| 2075 } | |
| 2076 | |
| 2077 Lisp_Object | |
| 2078 coding_stream_detected_coding_system (Lstream *stream) | |
| 2079 { | |
| 2080 Lisp_Object codesys = | |
| 2081 coding_stream_canonicalize_after_coding (stream); | |
| 2082 if (NILP (codesys)) | |
| 2083 return Fget_coding_system (Qidentity); | |
| 2084 return codesys; | |
| 2085 } | |
| 2086 | |
| 2087 Lisp_Object | |
| 2088 coding_stream_coding_system (Lstream *stream) | |
| 2089 { | |
| 2090 return CODING_STREAM_DATA (stream)->codesys; | |
| 2091 } | |
| 2092 | |
| 2093 /* Change the coding system associated with a stream. */ | |
| 2094 | |
| 2095 void | |
| 2096 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys) | |
| 2097 { | |
| 2098 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2099 if (EQ (str->orig_codesys, codesys)) | |
| 2100 return; | |
| 2101 /* We do the equivalent of closing the stream, destroying it, and | |
| 2102 reinitializing it. This includes flushing out the data and signalling | |
| 2103 EOF, if we're a writing stream; we also replace the type-specific data | |
| 2104 with the data appropriate for the new coding system. */ | |
| 2105 if (!NILP (str->codesys)) | |
| 2106 { | |
| 2107 if (lstr->flags & LSTREAM_FL_WRITE) | |
| 2108 { | |
| 2109 Lstream_flush (lstr); | |
| 2110 str->eof = 1; | |
| 2111 coding_writer (lstr, 0, 0); | |
| 2112 str->eof = 0; | |
| 2113 } | |
| 2114 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2115 } | |
| 2116 str->orig_codesys = codesys; | |
| 2117 str->codesys = coding_system_real_canonical (codesys); | |
| 2118 | |
| 2119 if (str->data) | |
| 2120 { | |
| 1726 | 2121 xfree (str->data, void *); |
| 771 | 2122 str->data = 0; |
| 428 | 2123 } |
| 771 | 2124 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size) |
| 1204 | 2125 { |
| 2126 str->data = | |
| 2127 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)-> | |
| 2128 coding_data_size); | |
| 2129 str->type = XCODING_SYSTEM_METHODS (str->codesys)->enumtype; | |
| 2130 } | |
| 771 | 2131 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str)); |
| 2132 /* The new coding system may have different ideas regarding whether its | |
| 2133 ends are characters or bytes. */ | |
| 2134 set_coding_character_mode (lstr); | |
| 2135 } | |
| 2136 | |
| 2137 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding | |
| 2138 stream for writing, no automatic code detection will be performed. | |
| 2139 The reason for this is that automatic code detection requires a | |
| 2140 seekable input. Things will also fail if you open a coding | |
| 2141 stream for reading using a non-fully-specified coding system and | |
| 2142 a non-seekable input stream. */ | |
| 2143 | |
| 2144 static Lisp_Object | |
| 2145 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys, | |
| 800 | 2146 const char *mode, enum encode_decode direction, |
| 802 | 2147 int flags) |
| 771 | 2148 { |
| 2149 Lstream *lstr = Lstream_new (lstream_coding, mode); | |
| 2150 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2151 | |
| 2152 codesys = Fget_coding_system (codesys); | |
| 2153 xzero (*str); | |
| 2154 str->codesys = Qnil; | |
| 2155 str->orig_codesys = Qnil; | |
| 2156 str->us = lstr; | |
| 2157 str->other_end = stream; | |
| 2158 str->convert_to = Dynarr_new (unsigned_char); | |
| 2159 str->convert_from = Dynarr_new (unsigned_char); | |
| 2160 str->direction = direction; | |
| 814 | 2161 if (flags & LSTREAM_FL_NO_CLOSE_OTHER) |
| 802 | 2162 str->no_close_other = 1; |
| 814 | 2163 if (flags & LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME) |
| 802 | 2164 str->one_byte_at_a_time = 1; |
| 814 | 2165 if (!(flags & LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING)) |
| 2166 str->set_char_mode_on_us_when_reading = 1; | |
| 802 | 2167 |
| 771 | 2168 set_coding_stream_coding_system (lstr, codesys); |
| 793 | 2169 return wrap_lstream (lstr); |
| 771 | 2170 } |
| 2171 | |
| 814 | 2172 /* FLAGS: |
| 2173 | |
| 2174 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2175 Don't close STREAM (the stream at the other end) when this stream is | |
| 2176 closed. | |
| 2177 | |
| 2178 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME | |
| 2179 When reading from STREAM, read and process one byte at a time rather | |
| 2180 than in large chunks. This is for reading from TTY's, so we don't | |
| 2181 block. #### We should instead create a non-blocking filedesc stream | |
| 2182 that emulates the behavior as necessary using select(), when the | |
| 2183 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2184 | |
| 2185 LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING | |
| 2186 When reading from STREAM, read and process one byte at a time rather | |
| 2187 than in large chunks. This is for reading from TTY's, so we don't | |
| 2188 block. #### We should instead create a non-blocking filedesc stream | |
| 2189 that emulates the behavior as necessary using select(), when the | |
| 2190 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2191 */ | |
| 771 | 2192 Lisp_Object |
| 2193 make_coding_input_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2194 enum encode_decode direction, int flags) |
| 771 | 2195 { |
| 800 | 2196 return make_coding_stream_1 (stream, codesys, "r", direction, |
| 802 | 2197 flags); |
| 771 | 2198 } |
| 2199 | |
| 814 | 2200 /* FLAGS: |
| 2201 | |
| 2202 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2203 Don't close STREAM (the stream at the other end) when this stream is | |
| 2204 closed. | |
| 2205 */ | |
| 771 | 2206 Lisp_Object |
| 2207 make_coding_output_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2208 enum encode_decode direction, int flags) |
| 771 | 2209 { |
| 800 | 2210 return make_coding_stream_1 (stream, codesys, "w", direction, |
| 802 | 2211 flags); |
| 771 | 2212 } |
| 2213 | |
| 2214 static Lisp_Object | |
| 2215 encode_decode_coding_region (Lisp_Object start, Lisp_Object end, | |
| 2216 Lisp_Object coding_system, Lisp_Object buffer, | |
| 2217 enum encode_decode direction) | |
| 2218 { | |
| 2219 Charbpos b, e; | |
| 2220 struct buffer *buf = decode_buffer (buffer, 0); | |
| 2221 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil; | |
| 2222 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil; | |
| 2223 Lisp_Object lb_outstream = Qnil; | |
| 2224 Lisp_Object next; | |
| 2225 Lstream *istr, *ostr; | |
| 2226 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
| 2227 struct gcpro ngcpro1; | |
| 2228 int source_char, sink_char; | |
| 2229 | |
| 2230 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 2231 barf_if_buffer_read_only (buf, b, e); | |
| 2232 | |
| 2233 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream); | |
| 2234 NGCPRO1 (auto_outstream); | |
| 2235 | |
| 2236 coding_system = Fget_coding_system (coding_system); | |
| 2237 source_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2238 CODING_SOURCE, | |
| 2239 direction); | |
| 2240 sink_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2241 CODING_SINK, | |
| 2242 direction); | |
| 2243 | |
| 2244 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */ | |
| 2245 instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 2246 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0); | |
| 2247 | |
| 2248 if (direction == CODING_DECODE && | |
| 2249 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT) | |
| 2250 next = auto_outstream = | |
| 2251 make_coding_output_stream | |
| 800 | 2252 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect), |
| 2253 CODING_DECODE, 0); | |
| 771 | 2254 |
| 2255 if (!sink_char) | |
| 2256 next = from_outstream = | |
| 800 | 2257 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0); |
| 771 | 2258 outstream = make_coding_output_stream (XLSTREAM (next), coding_system, |
| 800 | 2259 direction, 0); |
| 771 | 2260 if (!source_char) |
| 428 | 2261 { |
| 771 | 2262 to_outstream = |
| 2263 make_coding_output_stream (XLSTREAM (outstream), | |
| 800 | 2264 Qbinary, CODING_ENCODE, 0); |
| 771 | 2265 ostr = XLSTREAM (to_outstream); |
| 2266 } | |
| 2267 else | |
| 2268 ostr = XLSTREAM (outstream); | |
| 2269 istr = XLSTREAM (instream); | |
| 2270 | |
| 2271 /* The chain of streams looks like this: | |
| 2272 | |
| 2297 | 2273 [BUFFER] <----- (( read from/send to loop )) |
| 771 | 2274 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is |
| 2275 in bytes] | |
| 2276 ------> [ENCODE/DECODE AS SPECIFIED] | |
| 2277 ------> [BYTE->CHAR i.e. DECODE AS BINARY | |
| 2278 if sink is in bytes] | |
| 2279 ------> [AUTODETECT EOL if | |
| 2280 we're decoding and | |
| 2281 coding system calls | |
| 2282 for this] | |
| 2283 ------> [BUFFER] | |
| 2284 */ | |
| 2367 | 2285 |
| 2286 /* #### See comment | |
| 2287 | |
| 2288 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS | |
| 2289 | |
| 2290 in text.c. | |
| 2291 */ | |
| 2292 | |
| 771 | 2293 while (1) |
| 2294 { | |
| 2295 char tempbuf[1024]; /* some random amount */ | |
| 2296 Charbpos newpos, even_newer_pos; | |
| 2297 Charbpos oldpos = lisp_buffer_stream_startpos (istr); | |
| 2298 Bytecount size_in_bytes = | |
| 2299 Lstream_read (istr, tempbuf, sizeof (tempbuf)); | |
| 2300 | |
| 2301 if (!size_in_bytes) | |
| 2302 break; | |
| 2303 newpos = lisp_buffer_stream_startpos (istr); | |
| 2304 Lstream_write (ostr, tempbuf, size_in_bytes); | |
| 2305 even_newer_pos = lisp_buffer_stream_startpos (istr); | |
| 2306 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos), | |
| 2307 even_newer_pos, 0); | |
| 428 | 2308 } |
| 771 | 2309 |
| 2310 { | |
| 2311 Charcount retlen = | |
| 2312 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b; | |
| 2313 Lstream_close (istr); | |
| 2314 Lstream_close (ostr); | |
| 2315 NUNGCPRO; | |
| 2316 UNGCPRO; | |
| 2317 Lstream_delete (istr); | |
| 2318 if (!NILP (from_outstream)) | |
| 2319 Lstream_delete (XLSTREAM (from_outstream)); | |
| 2320 Lstream_delete (XLSTREAM (outstream)); | |
| 2321 if (!NILP (to_outstream)) | |
| 2322 Lstream_delete (XLSTREAM (to_outstream)); | |
| 2323 if (!NILP (auto_outstream)) | |
| 2324 Lstream_delete (XLSTREAM (auto_outstream)); | |
| 2325 Lstream_delete (XLSTREAM (lb_outstream)); | |
| 2326 return make_int (retlen); | |
| 2327 } | |
| 2328 } | |
| 2329 | |
| 3302 | 2330 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, |
| 2331 "*r\nzDecode from coding system: \ni", /* | |
| 771 | 2332 Decode the text between START and END which is encoded in CODING-SYSTEM. |
| 2333 This is useful if you've read in encoded text from a file without decoding | |
| 2334 it (e.g. you read in a JIS-formatted file but used the `binary' or | |
| 2335 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B"). | |
| 2336 Return length of decoded text. | |
| 3302 | 2337 BUFFER defaults to the current buffer if unspecified, and when interactive. |
| 771 | 2338 */ |
| 2339 (start, end, coding_system, buffer)) | |
| 2340 { | |
| 2341 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2342 CODING_DECODE); | |
| 2343 } | |
| 2344 | |
| 3302 | 2345 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, |
| 2346 "*r\nzEncode to coding system: \ni", /* | |
| 771 | 2347 Encode the text between START and END using CODING-SYSTEM. |
| 2348 This will, for example, convert Japanese characters into stuff such as | |
| 3302 | 2349 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded text. |
| 2350 BUFFER defaults to the current buffer if unspecified, and when interactive. | |
| 771 | 2351 */ |
| 2352 (start, end, coding_system, buffer)) | |
| 2353 { | |
| 2354 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2355 CODING_ENCODE); | |
| 428 | 2356 } |
| 2357 | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2358 DEFUN ("query-coding-region", Fquery_coding_region, 3, 7, 0, /* |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2359 Work out whether CODING-SYSTEM can losslessly encode a region. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2360 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2361 START and END are the beginning and end of the region to check. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2362 CODING-SYSTEM is the coding system to try. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2363 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2364 Optional argument BUFFER is the buffer to check, and defaults to the current |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2365 buffer. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2366 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2367 IGNORE-INVALID-SEQUENCESP, also an optional argument, says to treat XEmacs |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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4647
diff
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|
2368 characters which have an unambiguous encoded representation, despite being |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2369 undefined in what they represent, as encodable. These chiefly arise with |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2370 variable-length encodings like UTF-8 and UTF-16, where an invalid sequence |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2371 is passed through to XEmacs as a sequence of characters with a defined |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2372 correspondence to the octets on disk, but no non-error semantics; see the |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2373 `invalid-sequence-coding-system' argument to `set-language-info'. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2374 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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changeset
|
2375 They can also arise with fixed-length encodings like ISO 8859-7, where |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
2376 certain octets on disk have undefined values, and treating them as |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
2377 corresponding to the ISO 8859-1 characters with the same numerical values |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2378 may lead to data that is not understood by other applications. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2379 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
changeset
|
2380 Optional argument ERRORP says to signal a `text-conversion-error' if some |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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4647
diff
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|
2381 character in the region cannot be encoded, and defaults to nil. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2382 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2383 Optional argument HIGHLIGHT says to display unencodable characters in the |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2384 region using `query-coding-warning-face'. It defaults to nil. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2385 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2386 This function can return multiple values; the intention is that callers use |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2387 `multiple-value-bind' or the related CL multiple value functions to deal |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2388 with it. The first result is `t' if the region can be encoded using |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2389 CODING-SYSTEM, or `nil' if not. If the region cannot be encoded using |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2390 CODING-SYSTEM, the second result is a range table describing the positions |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2391 of the unencodable characters. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2392 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2393 Ranges that describe characters that would be ignored were |
|
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Move the #'query-coding-region implementation to C.
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|
2394 IGNORE-INVALID-SEQUENCESP non-nil map to the symbol `invalid-sequence'; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2395 other ranges map to the symbol `unencodable'. If IGNORE-INVALID-SEQUENCESP |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2396 is non-nil, all ranges will map to the symbol `unencodable'. See |
|
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Move the #'query-coding-region implementation to C.
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|
2397 `make-range-table' for more details of range tables. |
|
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Move the #'query-coding-region implementation to C.
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|
2398 */ |
|
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Move the #'query-coding-region implementation to C.
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|
2399 (start, end, coding_system, buffer, ignore_invalid_sequencesp, |
|
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|
2400 errorp, highlight)) |
|
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|
2401 { |
|
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Move the #'query-coding-region implementation to C.
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|
2402 Charbpos b, e; |
|
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Move the #'query-coding-region implementation to C.
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|
2403 struct buffer *buf = decode_buffer (buffer, 1); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2404 Lisp_Object result; |
|
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Move the #'query-coding-region implementation to C.
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|
2405 int flags = 0, speccount = specpdl_depth (); |
|
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Move the #'query-coding-region implementation to C.
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|
2406 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2407 coding_system = Fget_coding_system (coding_system); |
|
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Move the #'query-coding-region implementation to C.
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|
2408 |
|
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Move the #'query-coding-region implementation to C.
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|
2409 get_buffer_range_char (buf, start, end, &b, &e, 0); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2410 |
|
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Move the #'query-coding-region implementation to C.
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|
2411 if (buf != current_buffer) |
|
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Move the #'query-coding-region implementation to C.
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|
2412 { |
|
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Move the #'query-coding-region implementation to C.
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|
2413 record_unwind_protect (save_current_buffer_restore, Fcurrent_buffer ()); |
|
257b468bf2ca
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|
2414 set_buffer_internal (buf); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2415 } |
|
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|
2416 |
|
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|
2417 record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
|
257b468bf2ca
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|
2418 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2419 BUF_SET_PT (buf, b); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2420 |
|
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|
2421 if (!NILP (ignore_invalid_sequencesp)) |
|
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|
2422 { |
|
257b468bf2ca
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|
2423 flags |= QUERY_METHOD_IGNORE_INVALID_SEQUENCES; |
|
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|
2424 } |
|
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Move the #'query-coding-region implementation to C.
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|
2425 |
|
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Move the #'query-coding-region implementation to C.
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|
2426 if (!NILP (errorp)) |
|
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|
2427 { |
|
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2428 flags |= QUERY_METHOD_ERRORP; |
|
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2429 } |
|
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2430 |
|
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2431 if (!NILP (highlight)) |
|
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|
2432 { |
|
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|
2433 flags |= QUERY_METHOD_HIGHLIGHT; |
|
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2434 } |
|
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2435 |
|
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2436 result = XCODESYSMETH_OR_GIVEN (coding_system, query, |
|
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2437 (coding_system, buf, e, flags), Qunbound); |
|
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2438 |
|
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|
2439 if (UNBOUNDP (result)) |
|
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|
2440 { |
|
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|
2441 signal_error (Qtext_conversion_error, |
|
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2442 "Coding system doesn't say what it can encode", |
|
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|
2443 XCODING_SYSTEM_NAME (coding_system)); |
|
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|
2444 } |
|
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|
2445 |
|
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|
2446 result = (NILP (result)) ? Qt : values2 (Qnil, result); |
|
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|
2447 |
|
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|
2448 return unbind_to_1 (speccount, result); |
|
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|
2449 } |
|
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|
2450 |
|
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|
2451 |
| 428 | 2452 |
| 2453 /************************************************************************/ | |
| 771 | 2454 /* Chain methods */ |
| 428 | 2455 /************************************************************************/ |
| 2456 | |
| 771 | 2457 /* #### Need a way to create "opposite-direction" coding systems. */ |
| 2458 | |
| 2459 /* Chain two or more coding systems together to make a combination coding | |
| 2460 system. */ | |
| 2461 | |
| 2462 struct chain_coding_system | |
| 2463 { | |
| 2464 /* List of coding systems, in decode order */ | |
| 2465 Lisp_Object *chain; | |
| 2466 /* Number of coding systems in list */ | |
| 2467 int count; | |
| 2468 /* Coding system to return as a result of canonicalize-after-coding */ | |
| 2469 Lisp_Object canonicalize_after_coding; | |
| 2470 }; | |
| 2471 | |
| 2472 struct chain_coding_stream | |
| 2473 { | |
| 2474 int initted; | |
| 2475 /* Lstreams for chain coding system */ | |
| 2476 Lisp_Object *lstreams; | |
| 2477 int lstream_count; | |
| 2478 }; | |
| 2479 | |
| 1204 | 2480 static const struct memory_description chain_coding_system_description[] = { |
| 2481 { XD_INT, offsetof (struct chain_coding_system, count) }, | |
| 2367 | 2482 { XD_BLOCK_PTR, offsetof (struct chain_coding_system, chain), |
| 2551 | 2483 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 1204 | 2484 { XD_LISP_OBJECT, offsetof (struct chain_coding_system, |
| 2485 canonicalize_after_coding) }, | |
| 771 | 2486 { XD_END } |
| 2487 }; | |
| 2488 | |
| 1204 | 2489 static const struct memory_description chain_coding_stream_description_1 [] = { |
| 2490 { XD_INT, offsetof (struct chain_coding_stream, lstream_count) }, | |
| 2367 | 2491 { XD_BLOCK_PTR, offsetof (struct chain_coding_stream, lstreams), |
| 2551 | 2492 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 771 | 2493 { XD_END } |
| 2494 }; | |
| 2495 | |
| 1204 | 2496 const struct sized_memory_description chain_coding_stream_description = { |
| 2497 sizeof (struct chain_coding_stream), chain_coding_stream_description_1 | |
| 2498 }; | |
| 2499 | |
| 2500 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (chain); | |
| 2501 | |
| 771 | 2502 static Lisp_Object |
| 2503 chain_canonicalize (Lisp_Object codesys) | |
| 2504 { | |
| 2505 /* We make use of the fact that this method is called at init time, after | |
| 2506 properties have been parsed. init_method is called too early. */ | |
| 2507 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2508 any more. */ | |
| 2509 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys), | |
| 2510 XCODING_SYSTEM_CHAIN_CHAIN (codesys)); | |
| 2511 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys), | |
| 2512 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys), | |
| 2513 chain)); | |
| 2514 Fputhash (chain, codesys, Vchain_canonicalize_hash_table); | |
| 2515 return codesys; | |
| 2516 } | |
| 2517 | |
| 2518 static Lisp_Object | |
| 2519 chain_canonicalize_after_coding (struct coding_stream *str) | |
| 2520 { | |
| 2521 Lisp_Object cac = | |
| 2522 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys); | |
| 2523 if (!NILP (cac)) | |
| 2524 return cac; | |
| 2525 return str->codesys; | |
| 2526 #if 0 | |
| 2527 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2528 Lisp_Object us = str->codesys, codesys; | |
| 2529 int i; | |
| 2530 Lisp_Object chain; | |
| 2531 Lisp_Object tail; | |
| 2532 int changed = 0; | |
| 2533 | |
| 2534 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2535 any more. */ | |
| 2536 if (str->direction == CODING_ENCODE || !data->initted) | |
| 2537 return us; | |
| 2538 | |
| 2539 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us), | |
| 2540 XCODING_SYSTEM_CHAIN_CHAIN (us)); | |
| 2541 | |
| 2542 tail = chain; | |
| 2543 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++) | |
| 2544 { | |
| 2545 codesys = (coding_stream_canonicalize_after_coding | |
| 2546 (XLSTREAM (data->lstreams[i]))); | |
| 2547 if (!EQ (codesys, XCAR (tail))) | |
| 2548 changed = 1; | |
| 2549 XCAR (tail) = codesys; | |
| 2550 tail = XCDR (tail); | |
| 2551 } | |
| 2552 | |
| 2553 if (!changed) | |
| 2554 return us; | |
| 2555 | |
| 2556 chain = delq_no_quit (Qnil, chain); | |
| 2557 | |
| 2558 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) && | |
| 2559 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us))) | |
| 2560 { | |
| 2561 if (NILP (chain)) | |
| 2562 return Qnil; | |
| 2563 if (NILP (XCDR (chain))) | |
| 2564 return XCAR (chain); | |
| 2565 } | |
| 2566 | |
| 2567 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us), | |
| 2568 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us), | |
| 2569 chain)), Vchain_canonicalize_hash_table, | |
| 2570 Qnil); | |
| 2571 if (!NILP (codesys)) | |
| 2572 return codesys; | |
| 2573 return make_internal_coding_system | |
| 2574 (us, "internal-chain-canonicalizer-wrapper", | |
| 2575 Qchain, Qunbound, list2 (Qchain, chain)); | |
| 2576 #endif /* 0 */ | |
| 2577 } | |
| 2578 | |
| 2579 static void | |
| 2580 chain_init (Lisp_Object codesys) | |
| 2581 { | |
| 2582 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil; | |
| 2583 } | |
| 2584 | |
| 2585 static void | |
| 2586 chain_mark (Lisp_Object codesys) | |
| 2587 { | |
| 2588 int i; | |
| 2589 | |
| 2590 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++) | |
| 2591 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]); | |
| 2592 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys)); | |
| 2593 } | |
| 2594 | |
| 2595 static void | |
| 2596 chain_mark_coding_stream_1 (struct chain_coding_stream *data) | |
| 2597 { | |
| 2598 int i; | |
| 2599 | |
| 2600 for (i = 0; i < data->lstream_count; i++) | |
| 2601 mark_object (data->lstreams[i]); | |
| 2602 } | |
| 2603 | |
| 2604 static void | |
| 2605 chain_mark_coding_stream (struct coding_stream *str) | |
| 2606 { | |
| 2607 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2608 } | |
| 2609 | |
| 2610 static void | |
| 2611 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 2612 { | |
| 2613 int i; | |
| 2614 | |
| 826 | 2615 write_c_string (printcharfun, "("); |
| 771 | 2616 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++) |
| 2617 { | |
| 826 | 2618 write_c_string (printcharfun, i == 0 ? "" : "->"); |
| 771 | 2619 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i], |
| 2620 printcharfun, escapeflag); | |
| 2621 } | |
| 2622 { | |
| 2623 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs); | |
| 2624 if (!NILP (cac)) | |
| 2625 { | |
| 2626 if (i > 0) | |
| 826 | 2627 write_c_string (printcharfun, " "); |
| 2628 write_c_string (printcharfun, "canonicalize-after-coding="); | |
| 771 | 2629 print_coding_system_in_print_method (cac, printcharfun, escapeflag); |
| 2630 } | |
| 2631 } | |
| 2632 | |
| 826 | 2633 write_c_string (printcharfun, ")"); |
| 771 | 2634 } |
| 2635 | |
| 2636 static void | |
| 2637 chain_rewind_coding_stream_1 (struct chain_coding_stream *data) | |
| 2638 { | |
| 2639 /* Each will rewind the next; there is always at least one stream (the | |
| 2640 dynarr stream at the end) if we're initted */ | |
| 2641 if (data->initted) | |
| 2642 Lstream_rewind (XLSTREAM (data->lstreams[0])); | |
| 2643 } | |
| 2644 | |
| 2645 static void | |
| 2646 chain_rewind_coding_stream (struct coding_stream *str) | |
| 2647 { | |
| 2648 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2649 } | |
| 2650 | |
| 2651 static void | |
| 2652 chain_init_coding_streams_1 (struct chain_coding_stream *data, | |
| 2653 unsigned_char_dynarr *dst, | |
| 2654 int ncodesys, Lisp_Object *codesys, | |
| 2655 enum encode_decode direction) | |
| 2656 { | |
| 2657 int i; | |
| 2658 Lisp_Object lstream_out; | |
| 2659 | |
| 2660 data->lstream_count = ncodesys + 1; | |
| 2661 data->lstreams = xnew_array (Lisp_Object, data->lstream_count); | |
| 2662 | |
| 2663 lstream_out = make_dynarr_output_stream (dst); | |
| 2664 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0); | |
| 2665 data->lstreams[data->lstream_count - 1] = lstream_out; | |
| 2666 | |
| 2667 for (i = ncodesys - 1; i >= 0; i--) | |
| 2668 { | |
| 2669 data->lstreams[i] = | |
| 2670 make_coding_output_stream | |
| 2671 (XLSTREAM (lstream_out), | |
| 2672 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i], | |
| 800 | 2673 direction, 0); |
| 771 | 2674 lstream_out = data->lstreams[i]; |
| 2675 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, | |
| 2676 0); | |
| 2677 } | |
| 2678 data->initted = 1; | |
| 2679 } | |
| 2680 | |
| 2681 static Bytecount | |
| 2682 chain_convert (struct coding_stream *str, const UExtbyte *src, | |
| 2683 unsigned_char_dynarr *dst, Bytecount n) | |
| 2684 { | |
| 2685 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2686 | |
| 2687 if (str->eof) | |
| 2688 { | |
| 2689 /* Each will close the next; there is always at least one stream (the | |
| 2690 dynarr stream at the end) if we're initted. We need to close now | |
| 2691 because more data may be generated. */ | |
| 2692 if (data->initted) | |
| 2693 Lstream_close (XLSTREAM (data->lstreams[0])); | |
| 2694 return n; | |
| 2695 } | |
| 2696 | |
| 2697 if (!data->initted) | |
| 2698 chain_init_coding_streams_1 | |
| 2699 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys), | |
| 2700 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction); | |
| 2701 | |
| 2702 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0) | |
| 2703 return -1; | |
| 2704 return n; | |
| 2705 } | |
| 2706 | |
| 2707 static void | |
| 2708 chain_finalize_coding_stream_1 (struct chain_coding_stream *data) | |
| 2709 { | |
| 2710 if (data->lstreams) | |
| 2711 { | |
| 2297 | 2712 /* During GC, these objects are unmarked, and are about to be freed. |
| 2713 We do NOT want them on the free list, and that will cause lots of | |
| 2714 nastiness including crashes. Just let them be freed normally. */ | |
| 771 | 2715 if (!gc_in_progress) |
| 2716 { | |
| 2717 int i; | |
| 2297 | 2718 /* Order of deletion is important here! Delete from the head of |
| 2719 the chain and work your way towards the tail. In general, | |
| 2720 when you delete an object, there should be *NO* pointers to it | |
| 2721 anywhere. Deleting back-to-front would be a problem because | |
| 2722 there are pointers going forward. If there were pointers in | |
| 2723 both directions, you'd have to disconnect the pointers to a | |
| 2724 particular object before deleting it. */ | |
| 771 | 2725 for (i = 0; i < data->lstream_count; i++) |
| 2726 Lstream_delete (XLSTREAM ((data->lstreams)[i])); | |
| 2727 } | |
| 1726 | 2728 xfree (data->lstreams, Lisp_Object *); |
| 771 | 2729 } |
| 2730 } | |
| 2731 | |
| 2732 static void | |
| 2733 chain_finalize_coding_stream (struct coding_stream *str) | |
| 2734 { | |
| 2735 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2736 } | |
| 2737 | |
| 2738 static void | |
| 2739 chain_finalize (Lisp_Object c) | |
| 2740 { | |
| 2741 if (XCODING_SYSTEM_CHAIN_CHAIN (c)) | |
| 1726 | 2742 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c), Lisp_Object *); |
| 771 | 2743 } |
| 2744 | |
| 428 | 2745 static int |
| 771 | 2746 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 2747 { | |
| 2748 if (EQ (key, Qchain)) | |
| 2749 { | |
| 2750 Lisp_Object *cslist; | |
| 2751 int count = 0; | |
| 2752 int i; | |
| 2753 | |
| 2367 | 2754 { |
| 2755 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2756 { | |
| 2757 Fget_coding_system (elt); | |
| 2758 count++; | |
| 2759 } | |
| 2760 } | |
| 771 | 2761 |
| 2762 cslist = xnew_array (Lisp_Object, count); | |
| 2763 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist; | |
| 2764 | |
| 2765 count = 0; | |
| 2367 | 2766 { |
| 2767 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2768 { | |
| 2769 cslist[count] = Fget_coding_system (elt); | |
| 2770 count++; | |
| 2771 } | |
| 2772 } | |
| 771 | 2773 |
| 2774 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count; | |
| 2775 | |
| 2776 for (i = 0; i < count - 1; i++) | |
| 2777 { | |
| 2778 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) != | |
| 2779 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE)) | |
| 2780 invalid_argument_2 ("Sink of first must match source of second", | |
| 2781 cslist[i], cslist[i + 1]); | |
| 2782 } | |
| 2783 } | |
| 2784 else if (EQ (key, Qcanonicalize_after_coding)) | |
| 2785 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = | |
| 2786 Fget_coding_system (value); | |
| 2787 else | |
| 2788 return 0; | |
| 2789 return 1; | |
| 2790 } | |
| 2791 | |
| 2792 static Lisp_Object | |
| 2793 chain_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 2794 { | |
| 2795 if (EQ (prop, Qchain)) | |
| 2796 { | |
| 2797 Lisp_Object result = Qnil; | |
| 2798 int i; | |
| 2799 | |
| 2800 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++) | |
| 2801 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i], | |
| 2802 result); | |
| 2803 | |
| 2804 return Fnreverse (result); | |
| 2805 } | |
| 2806 else if (EQ (prop, Qcanonicalize_after_coding)) | |
| 2807 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system); | |
| 2808 else | |
| 2809 return Qunbound; | |
| 2810 } | |
| 2811 | |
| 2812 static enum source_sink_type | |
| 2813 chain_conversion_end_type (Lisp_Object codesys) | |
| 2814 { | |
| 2815 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys); | |
| 2816 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys); | |
| 2817 int charp_source, charp_sink; | |
| 2818 | |
| 2819 if (n == 0) | |
| 2820 return DECODES_BYTE_TO_BYTE; /* arbitrary */ | |
| 2821 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE); | |
| 2822 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK); | |
| 2823 | |
| 2824 switch (charp_source * 2 + charp_sink) | |
| 2825 { | |
| 2826 case 0: return DECODES_BYTE_TO_BYTE; | |
| 2827 case 1: return DECODES_BYTE_TO_CHARACTER; | |
| 2828 case 2: return DECODES_CHARACTER_TO_BYTE; | |
| 2829 case 3: return DECODES_CHARACTER_TO_CHARACTER; | |
| 2830 } | |
| 2831 | |
| 2500 | 2832 ABORT (); |
| 771 | 2833 return DECODES_BYTE_TO_BYTE; |
| 2834 } | |
| 2835 | |
| 2836 | |
| 2837 /************************************************************************/ | |
| 2838 /* No-conversion methods */ | |
| 2839 /************************************************************************/ | |
| 2840 | |
| 2841 /* "No conversion"; used for binary files. We use quotes because there | |
| 2842 really is some conversion being applied (it does byte<->char | |
| 2843 conversion), but it appears to the user as if the text is read in | |
| 2297 | 2844 without conversion. |
| 2845 | |
| 2846 #### Shouldn't we _call_ it that, then? And while we're at it, | |
| 2847 separate it into "to_internal" and "to_external"? */ | |
| 771 | 2848 DEFINE_CODING_SYSTEM_TYPE (no_conversion); |
| 2849 | |
| 2850 /* This is used when reading in "binary" files -- i.e. files that may | |
| 2851 contain all 256 possible byte values and that are not to be | |
| 2852 interpreted as being in any particular encoding. */ | |
| 2853 static Bytecount | |
| 2854 no_conversion_convert (struct coding_stream *str, | |
| 2855 const UExtbyte *src, | |
| 2856 unsigned_char_dynarr *dst, Bytecount n) | |
| 2857 { | |
| 2858 UExtbyte c; | |
| 2859 unsigned int ch = str->ch; | |
| 2860 Bytecount orign = n; | |
| 2861 | |
| 2862 if (str->direction == CODING_DECODE) | |
| 2863 { | |
| 2864 while (n--) | |
| 2865 { | |
| 2866 c = *src++; | |
| 2867 | |
| 2868 DECODE_ADD_BINARY_CHAR (c, dst); | |
| 2869 } | |
| 2870 | |
| 2871 if (str->eof) | |
| 2872 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst); | |
| 2873 } | |
| 2874 else | |
| 2875 { | |
| 2876 | |
| 2877 while (n--) | |
| 2878 { | |
| 2879 c = *src++; | |
| 826 | 2880 if (byte_ascii_p (c)) |
| 771 | 2881 { |
| 2882 assert (ch == 0); | |
| 2883 Dynarr_add (dst, c); | |
| 2884 } | |
| 2885 #ifdef MULE | |
| 867 | 2886 else if (ibyte_leading_byte_p (c)) |
| 771 | 2887 { |
| 2888 assert (ch == 0); | |
| 2889 if (c == LEADING_BYTE_LATIN_ISO8859_1 || | |
| 2890 c == LEADING_BYTE_CONTROL_1) | |
| 2891 ch = c; | |
| 2892 else | |
| 2297 | 2893 /* #### This is just plain unacceptable. */ |
| 771 | 2894 Dynarr_add (dst, '~'); /* untranslatable character */ |
| 2895 } | |
| 2896 else | |
| 2897 { | |
| 2898 if (ch == LEADING_BYTE_LATIN_ISO8859_1) | |
| 2899 Dynarr_add (dst, c); | |
| 2900 else if (ch == LEADING_BYTE_CONTROL_1) | |
| 2901 { | |
| 2902 assert (c < 0xC0); | |
| 2903 Dynarr_add (dst, c - 0x20); | |
| 2904 } | |
| 2905 /* else it should be the second or third byte of an | |
| 2906 untranslatable character, so ignore it */ | |
| 2907 ch = 0; | |
| 2908 } | |
| 2909 #endif /* MULE */ | |
| 2910 | |
| 2911 } | |
| 2912 } | |
| 2913 | |
| 2914 str->ch = ch; | |
| 2915 return orign; | |
| 2916 } | |
| 2917 | |
| 2918 DEFINE_DETECTOR (no_conversion); | |
| 2919 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 2920 | |
| 2921 struct no_conversion_detector | |
| 2922 { | |
| 2923 int dummy; | |
| 2924 }; | |
| 2925 | |
| 2926 static void | |
| 2286 | 2927 no_conversion_detect (struct detection_state *st, const UExtbyte *UNUSED (src), |
| 2928 Bytecount UNUSED (n)) | |
| 771 | 2929 { |
| 2930 /* Hack until we get better handling of this stuff! */ | |
| 2931 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY; | |
| 2932 } | |
| 2933 | |
| 2934 | |
| 2935 /************************************************************************/ | |
| 2936 /* Convert-eol methods */ | |
| 2937 /************************************************************************/ | |
| 2938 | |
| 2939 /* This is used to handle end-of-line (EOL) differences. It is | |
| 2819 | 2940 character-to-character, and works (when encoding) *BEFORE* sending data to |
| 2941 the main encoding routine -- thus, that routine must handle different EOL | |
| 2942 types itself if it does line-oriented type processing. This is unavoidable | |
| 2943 because we don't know whether the output of the main encoding routine is | |
| 2944 ASCII compatible (UTF-16 is definitely not, for example). [[ sjt sez this | |
| 2945 is bogus. There should be _no_ EOL processing (or processing of any kind) | |
| 2946 after conversion to external. ]] | |
| 771 | 2947 |
| 793 | 2948 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil. |
| 771 | 2949 */ |
| 2950 | |
| 2951 struct convert_eol_coding_system | |
| 2952 { | |
| 2953 enum eol_type subtype; | |
| 2132 | 2954 int dummy; /* On some architectures (eg ia64) the portable dumper can |
| 2955 produce unaligned access errors without this field. Probably | |
| 2956 because the combined structure of this structure and | |
| 2957 Lisp_Coding_System is not properly aligned. */ | |
| 771 | 2958 }; |
| 2959 | |
| 2960 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2961 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2962 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2963 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2964 | |
| 2965 struct convert_eol_coding_stream | |
| 2966 { | |
| 2967 enum eol_type actual; | |
| 2968 }; | |
| 2969 | |
| 1204 | 2970 static const struct memory_description |
| 771 | 2971 convert_eol_coding_system_description[] = { |
| 2972 { XD_END } | |
| 2973 }; | |
| 2974 | |
| 1204 | 2975 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol); |
| 2976 | |
| 771 | 2977 static void |
| 2286 | 2978 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun, |
| 2979 int UNUSED (escapeflag)) | |
| 771 | 2980 { |
| 2981 struct convert_eol_coding_system *data = | |
| 2982 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol); | |
| 2983 | |
| 2984 write_fmt_string (printcharfun, "(%s)", | |
| 2985 data->subtype == EOL_LF ? "lf" : | |
| 2986 data->subtype == EOL_CRLF ? "crlf" : | |
| 2987 data->subtype == EOL_CR ? "cr" : | |
| 793 | 2988 data->subtype == EOL_AUTODETECT ? "nil" : |
| 2500 | 2989 (ABORT(), "")); |
| 771 | 2990 } |
| 2991 | |
| 2992 static enum source_sink_type | |
| 2286 | 2993 convert_eol_conversion_end_type (Lisp_Object UNUSED (codesys)) |
| 771 | 2994 { |
| 2995 return DECODES_CHARACTER_TO_CHARACTER; | |
| 2996 } | |
| 2997 | |
| 2998 static int | |
| 2999 convert_eol_putprop (Lisp_Object codesys, | |
| 3000 Lisp_Object key, | |
| 3001 Lisp_Object value) | |
| 3002 { | |
| 3003 struct convert_eol_coding_system *data = | |
| 3004 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol); | |
| 3005 | |
| 3006 if (EQ (key, Qsubtype)) | |
| 3007 { | |
| 3008 if (EQ (value, Qlf) /* || EQ (value, Qunix) */) | |
| 3009 data->subtype = EOL_LF; | |
| 3010 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */) | |
| 3011 data->subtype = EOL_CRLF; | |
| 3012 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */) | |
| 3013 data->subtype = EOL_CR; | |
| 793 | 3014 else if (EQ (value, Qnil)) |
| 771 | 3015 data->subtype = EOL_AUTODETECT; |
| 3016 else invalid_constant ("Unrecognized eol type", value); | |
| 3017 } | |
| 3018 else | |
| 3019 return 0; | |
| 3020 return 1; | |
| 3021 } | |
| 3022 | |
| 3023 static Lisp_Object | |
| 3024 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 3025 { | |
| 3026 struct convert_eol_coding_system *data = | |
| 3027 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol); | |
| 3028 | |
| 3029 if (EQ (prop, Qsubtype)) | |
| 3030 { | |
| 3031 switch (data->subtype) | |
| 3032 { | |
| 3033 case EOL_LF: return Qlf; | |
| 3034 case EOL_CRLF: return Qcrlf; | |
| 3035 case EOL_CR: return Qcr; | |
| 793 | 3036 case EOL_AUTODETECT: return Qnil; |
| 2500 | 3037 default: ABORT (); |
| 771 | 3038 } |
| 3039 } | |
| 3040 | |
| 3041 return Qunbound; | |
| 3042 } | |
| 3043 | |
| 3044 static void | |
| 3045 convert_eol_init_coding_stream (struct coding_stream *str) | |
| 3046 { | |
| 3047 struct convert_eol_coding_stream *data = | |
| 3048 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3049 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 3050 } | |
| 3051 | |
| 3052 static Bytecount | |
| 867 | 3053 convert_eol_convert (struct coding_stream *str, const Ibyte *src, |
| 771 | 3054 unsigned_char_dynarr *dst, Bytecount n) |
| 3055 { | |
| 3056 if (str->direction == CODING_DECODE) | |
| 3057 { | |
| 3058 struct convert_eol_coding_stream *data = | |
| 3059 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3060 | |
| 3061 if (data->actual == EOL_AUTODETECT) | |
| 3062 { | |
| 3063 Bytecount n2 = n; | |
| 867 | 3064 const Ibyte *src2 = src; |
| 771 | 3065 |
| 3066 for (; n2; n2--) | |
| 3067 { | |
| 867 | 3068 Ibyte c = *src2++; |
| 771 | 3069 if (c == '\n') |
| 3070 { | |
| 3071 data->actual = EOL_LF; | |
| 3072 break; | |
| 3073 } | |
| 3074 else if (c == '\r') | |
| 3075 { | |
| 3076 if (n2 == 1) | |
| 3077 { | |
| 3078 /* If we're seeing a '\r' at the end of the data, then | |
| 3079 reject the '\r' right now so it doesn't become an | |
| 3080 issue in the code below -- unless we're at the end of | |
| 3081 the stream, in which case we can't do that (because | |
| 3082 then the '\r' will never get written out), and in any | |
| 3083 case we should be recognizing it at EOL_CR format. */ | |
| 3084 if (str->eof) | |
| 3085 data->actual = EOL_CR; | |
| 3086 else | |
| 3087 n--; | |
| 3088 break; | |
| 3089 } | |
| 3090 else if (*src2 == '\n') | |
| 3091 data->actual = EOL_CRLF; | |
| 3092 else | |
| 3093 data->actual = EOL_CR; | |
| 3094 break; | |
| 3095 } | |
| 3096 } | |
| 3097 } | |
| 3098 | |
| 3099 /* str->eof is set, the caller reached EOF on the other end and has | |
| 3100 no new data to give us. The only data we get is the data we | |
| 3101 rejected from last time. */ | |
| 3102 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT || | |
| 3103 (str->eof)) | |
| 3104 Dynarr_add_many (dst, src, n); | |
| 3105 else | |
| 3106 { | |
| 867 | 3107 const Ibyte *end = src + n; |
| 771 | 3108 while (1) |
| 3109 { | |
| 3110 /* Find the next section with no \r and add it. */ | |
| 867 | 3111 const Ibyte *runstart = src; |
| 3112 src = (Ibyte *) memchr (src, '\r', end - src); | |
| 771 | 3113 if (!src) |
| 3114 src = end; | |
| 3115 Dynarr_add_many (dst, runstart, src - runstart); | |
| 3116 /* Stop if at end ... */ | |
| 3117 if (src == end) | |
| 3118 break; | |
| 3119 /* ... else, translate as necessary. */ | |
| 3120 src++; | |
| 3121 if (data->actual == EOL_CR) | |
| 3122 Dynarr_add (dst, '\n'); | |
| 3123 /* We need to be careful here with CRLF. If we see a CR at the | |
| 3124 end of the data, we don't know if it's part of a CRLF, so we | |
| 3125 reject it. Otherwise: If it's part of a CRLF, eat it and | |
| 3126 loop; the following LF gets added next time around. If it's | |
| 3127 not part of a CRLF, add the CR and loop. The following | |
| 3128 character will be processed in the next loop iteration. This | |
| 3129 correctly handles a sequence like CR+CR+LF. */ | |
| 3130 else if (src == end) | |
| 3131 return n - 1; /* reject the CR at the end; we'll get it again | |
| 3132 next time the convert method is called */ | |
| 3133 else if (*src != '\n') | |
| 3134 Dynarr_add (dst, '\r'); | |
| 3135 } | |
| 3136 } | |
| 3137 | |
| 3138 return n; | |
| 3139 } | |
| 3140 else | |
| 3141 { | |
| 3142 enum eol_type subtype = | |
| 3143 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 867 | 3144 const Ibyte *end = src + n; |
| 771 | 3145 |
| 3146 /* We try to be relatively efficient here. */ | |
| 3147 if (subtype == EOL_LF) | |
| 3148 Dynarr_add_many (dst, src, n); | |
| 3149 else | |
| 3150 { | |
| 3151 while (1) | |
| 3152 { | |
| 3153 /* Find the next section with no \n and add it. */ | |
| 867 | 3154 const Ibyte *runstart = src; |
| 3155 src = (Ibyte *) memchr (src, '\n', end - src); | |
| 771 | 3156 if (!src) |
| 3157 src = end; | |
| 3158 Dynarr_add_many (dst, runstart, src - runstart); | |
| 3159 /* Stop if at end ... */ | |
| 3160 if (src == end) | |
| 3161 break; | |
| 3162 /* ... else, skip over \n and add its translation. */ | |
| 3163 src++; | |
| 3164 Dynarr_add (dst, '\r'); | |
| 3165 if (subtype == EOL_CRLF) | |
| 3166 Dynarr_add (dst, '\n'); | |
| 3167 } | |
| 3168 } | |
| 3169 | |
| 3170 return n; | |
| 3171 } | |
| 3172 } | |
| 3173 | |
| 3174 static Lisp_Object | |
| 3175 convert_eol_canonicalize_after_coding (struct coding_stream *str) | |
| 3176 { | |
| 3177 struct convert_eol_coding_stream *data = | |
| 3178 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3179 | |
| 3180 if (str->direction == CODING_ENCODE) | |
| 3181 return str->codesys; | |
| 3182 | |
| 3183 switch (data->actual) | |
| 3184 { | |
| 3185 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf); | |
| 3186 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf); | |
| 3187 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr); | |
| 3188 case EOL_AUTODETECT: return str->codesys; | |
| 2500 | 3189 default: ABORT (); return Qnil; |
| 771 | 3190 } |
| 3191 } | |
| 3192 | |
| 3193 | |
| 3194 /************************************************************************/ | |
| 3195 /* Undecided methods */ | |
| 3196 /************************************************************************/ | |
| 3197 | |
| 3198 /* Do autodetection. We can autodetect the EOL type only, the coding | |
| 3199 system only, or both. We only do autodetection when decoding; when | |
| 3200 encoding, we just pass the data through. | |
| 3201 | |
| 3202 When doing just EOL detection, a coding system can be specified; if so, | |
| 3203 we will decode this data through the coding system before doing EOL | |
| 3204 detection. The reason for specifying this is so that | |
| 3205 canonicalize-after-coding works: We will canonicalize the specified | |
| 3206 coding system into the appropriate EOL type. When doing both coding and | |
| 3207 EOL detection, we do similar canonicalization, and also catch situations | |
| 3208 where the EOL type is overspecified, i.e. the detected coding system | |
| 3209 specifies an EOL type, and either switch to the equivalent | |
| 3210 non-EOL-processing coding system (if possible), or terminate EOL | |
| 3211 detection and use the specified EOL type. This prevents data from being | |
| 3212 EOL-processed twice. | |
| 3213 */ | |
| 3214 | |
| 3215 struct undecided_coding_system | |
| 3216 { | |
| 3217 int do_eol, do_coding; | |
| 3218 Lisp_Object cs; | |
| 3219 }; | |
| 3220 | |
| 3221 struct undecided_coding_stream | |
| 3222 { | |
| 3223 Lisp_Object actual; | |
| 3224 /* Either 2 or 3 lstreams here; see undecided_convert */ | |
| 3225 struct chain_coding_stream c; | |
| 3226 | |
| 3227 struct detection_state *st; | |
| 3228 }; | |
| 3229 | |
| 1204 | 3230 static const struct memory_description undecided_coding_system_description[] = { |
| 3231 { XD_LISP_OBJECT, offsetof (struct undecided_coding_system, cs) }, | |
| 771 | 3232 { XD_END } |
| 3233 }; | |
| 3234 | |
| 1204 | 3235 static const struct memory_description undecided_coding_stream_description_1 [] = { |
| 3236 { XD_LISP_OBJECT, offsetof (struct undecided_coding_stream, actual) }, | |
| 2367 | 3237 { XD_BLOCK_ARRAY, offsetof (struct undecided_coding_stream, c), |
| 2551 | 3238 1, { &chain_coding_stream_description } }, |
| 1204 | 3239 { XD_END } |
| 3240 }; | |
| 3241 | |
| 3242 const struct sized_memory_description undecided_coding_stream_description = { | |
| 3243 sizeof (struct undecided_coding_stream), undecided_coding_stream_description_1 | |
| 3244 }; | |
| 3245 | |
| 3246 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (undecided); | |
| 3247 | |
| 771 | 3248 static void |
| 3249 undecided_init (Lisp_Object codesys) | |
| 3250 { | |
| 3251 struct undecided_coding_system *data = | |
| 3252 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3253 | |
| 3254 data->cs = Qnil; | |
| 3255 } | |
| 3256 | |
| 3257 static void | |
| 3258 undecided_mark (Lisp_Object codesys) | |
| 3259 { | |
| 3260 struct undecided_coding_system *data = | |
| 3261 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3262 | |
| 3263 mark_object (data->cs); | |
| 3264 } | |
| 3265 | |
| 3266 static void | |
| 3267 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 3268 { | |
| 3269 struct undecided_coding_system *data = | |
| 3270 XCODING_SYSTEM_TYPE_DATA (cs, undecided); | |
| 3271 int need_space = 0; | |
| 3272 | |
| 826 | 3273 write_c_string (printcharfun, "("); |
| 771 | 3274 if (data->do_eol) |
| 3275 { | |
| 826 | 3276 write_c_string (printcharfun, "do-eol"); |
| 771 | 3277 need_space = 1; |
| 3278 } | |
| 3279 if (data->do_coding) | |
| 3280 { | |
| 3281 if (need_space) | |
| 826 | 3282 write_c_string (printcharfun, " "); |
| 3283 write_c_string (printcharfun, "do-coding"); | |
| 771 | 3284 need_space = 1; |
| 3285 } | |
| 3286 if (!NILP (data->cs)) | |
| 3287 { | |
| 3288 if (need_space) | |
| 826 | 3289 write_c_string (printcharfun, " "); |
| 3290 write_c_string (printcharfun, "coding-system="); | |
| 771 | 3291 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag); |
| 3292 } | |
| 826 | 3293 write_c_string (printcharfun, ")"); |
| 771 | 3294 } |
| 3295 | |
| 3296 static void | |
| 3297 undecided_mark_coding_stream (struct coding_stream *str) | |
| 3298 { | |
| 1204 | 3299 mark_object (CODING_STREAM_TYPE_DATA (str, undecided)->actual); |
| 771 | 3300 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); |
| 3301 } | |
| 3302 | |
| 3303 static int | |
| 3304 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) | |
| 3305 { | |
| 3306 struct undecided_coding_system *data = | |
| 3307 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3308 | |
| 3309 if (EQ (key, Qdo_eol)) | |
| 3310 data->do_eol = 1; | |
| 3311 else if (EQ (key, Qdo_coding)) | |
| 3312 data->do_coding = 1; | |
| 3313 else if (EQ (key, Qcoding_system)) | |
| 3314 data->cs = get_coding_system_for_text_file (value, 0); | |
| 3315 else | |
| 3316 return 0; | |
| 3317 return 1; | |
| 3318 } | |
| 3319 | |
| 3320 static Lisp_Object | |
| 3321 undecided_getprop (Lisp_Object codesys, Lisp_Object prop) | |
| 3322 { | |
| 3323 struct undecided_coding_system *data = | |
| 3324 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3325 | |
| 3326 if (EQ (prop, Qdo_eol)) | |
| 3327 return data->do_eol ? Qt : Qnil; | |
| 3328 if (EQ (prop, Qdo_coding)) | |
| 3329 return data->do_coding ? Qt : Qnil; | |
| 3330 if (EQ (prop, Qcoding_system)) | |
| 3331 return data->cs; | |
| 3332 return Qunbound; | |
| 3333 } | |
| 3334 | |
| 3335 static struct detection_state * | |
| 3336 allocate_detection_state (void) | |
| 3337 { | |
| 3338 int i; | |
| 3339 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3340 struct detection_state *block; | |
| 3341 | |
| 3342 for (i = 0; i < coding_detector_count; i++) | |
| 3343 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3344 | |
| 3345 block = (struct detection_state *) xmalloc_and_zero (size); | |
| 3346 | |
| 3347 size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3348 for (i = 0; i < coding_detector_count; i++) | |
| 3349 { | |
| 3350 block->data_offset[i] = size; | |
| 3351 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3352 } | |
| 3353 | |
| 3354 return block; | |
| 3355 } | |
| 3356 | |
| 3357 static void | |
| 3358 free_detection_state (struct detection_state *st) | |
| 3359 { | |
| 3360 int i; | |
| 3361 | |
| 3362 for (i = 0; i < coding_detector_count; i++) | |
| 3363 { | |
| 3364 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method) | |
| 3365 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method | |
| 3366 (st); | |
| 3367 } | |
| 3368 | |
| 1726 | 3369 xfree (st, struct detection_state *); |
| 771 | 3370 } |
| 3371 | |
| 3372 static int | |
| 3373 coding_category_symbol_to_id (Lisp_Object symbol) | |
| 428 | 3374 { |
| 3375 int i; | |
| 3376 | |
| 3377 CHECK_SYMBOL (symbol); | |
| 771 | 3378 for (i = 0; i < coding_detector_count; i++) |
| 3379 { | |
| 3380 detector_category_dynarr *cats = | |
| 3381 Dynarr_at (all_coding_detectors, i).cats; | |
| 3382 int j; | |
| 3383 | |
| 3384 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3385 if (EQ (Dynarr_at (cats, j).sym, symbol)) | |
| 3386 return Dynarr_at (cats, j).id; | |
| 3387 } | |
| 3388 | |
| 563 | 3389 invalid_constant ("Unrecognized coding category", symbol); |
| 1204 | 3390 RETURN_NOT_REACHED (0); |
| 428 | 3391 } |
| 3392 | |
| 771 | 3393 static Lisp_Object |
| 3394 coding_category_id_to_symbol (int id) | |
| 428 | 3395 { |
| 3396 int i; | |
| 771 | 3397 |
| 3398 for (i = 0; i < coding_detector_count; i++) | |
| 3399 { | |
| 3400 detector_category_dynarr *cats = | |
| 3401 Dynarr_at (all_coding_detectors, i).cats; | |
| 3402 int j; | |
| 3403 | |
| 3404 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3405 if (id == Dynarr_at (cats, j).id) | |
| 3406 return Dynarr_at (cats, j).sym; | |
| 3407 } | |
| 3408 | |
| 2500 | 3409 ABORT (); |
| 771 | 3410 return Qnil; /* (usually) not reached */ |
| 428 | 3411 } |
| 3412 | |
| 771 | 3413 static Lisp_Object |
| 3414 detection_result_number_to_symbol (enum detection_result result) | |
| 428 | 3415 { |
| 1494 | 3416 /* let compiler warn if not all enumerators are handled */ |
| 3417 switch (result) { | |
| 3418 #define FROB(sym, num) case num: return (sym) | |
| 771 | 3419 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); |
| 3420 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3421 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3422 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3423 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3424 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3425 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3426 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3427 #undef FROB | |
| 1494 | 3428 } |
| 771 | 3429 |
| 2500 | 3430 ABORT (); |
| 771 | 3431 return Qnil; /* (usually) not reached */ |
| 3432 } | |
| 3433 | |
| 778 | 3434 #if 0 /* not used */ |
| 771 | 3435 static enum detection_result |
| 3436 detection_result_symbol_to_number (Lisp_Object symbol) | |
| 3437 { | |
| 1494 | 3438 /* using switch here would be bad style, and doesn't help */ |
| 771 | 3439 #define FROB(sym, num) if (EQ (symbol, sym)) return (num) |
| 3440 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); | |
| 3441 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3442 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3443 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3444 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3445 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3446 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3447 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3448 #undef FROB | |
| 3449 | |
| 3450 invalid_constant ("Unrecognized detection result", symbol); | |
| 3451 return ((enum detection_result) 0); /* not reached */ | |
| 3452 } | |
| 778 | 3453 #endif /* 0 */ |
| 771 | 3454 |
| 3455 /* Set all detection results for a given detector to a specified value. */ | |
| 3456 void | |
| 3457 set_detection_results (struct detection_state *st, int detector, int given) | |
| 3458 { | |
| 3459 detector_category_dynarr *cats = | |
| 3460 Dynarr_at (all_coding_detectors, detector).cats; | |
| 3461 int i; | |
| 3462 | |
| 3463 for (i = 0; i < Dynarr_length (cats); i++) | |
| 3464 st->categories[Dynarr_at (cats, i).id] = given; | |
| 3465 } | |
| 428 | 3466 |
| 3467 static int | |
| 3468 acceptable_control_char_p (int c) | |
| 3469 { | |
| 3470 switch (c) | |
| 3471 { | |
| 3472 /* Allow and ignore control characters that you might | |
| 3473 reasonably see in a text file */ | |
| 3474 case '\r': | |
| 3475 case '\n': | |
| 3476 case '\t': | |
| 3477 case 7: /* bell */ | |
| 3478 case 8: /* backspace */ | |
| 3479 case 11: /* vertical tab */ | |
| 3480 case 12: /* form feed */ | |
| 3481 case 26: /* MS-DOS C-z junk */ | |
| 3482 case 31: /* '^_' -- for info */ | |
| 3483 return 1; | |
| 3484 default: | |
| 3485 return 0; | |
| 3486 } | |
| 3487 } | |
| 3488 | |
| 771 | 3489 #ifdef DEBUG_XEMACS |
| 3490 | |
| 3491 static UExtbyte | |
| 3492 hex_digit_to_char (int digit) | |
| 428 | 3493 { |
| 771 | 3494 if (digit < 10) |
| 3495 return digit + '0'; | |
| 3496 else | |
| 3497 return digit - 10 + 'A'; | |
| 428 | 3498 } |
| 3499 | |
| 771 | 3500 static void |
| 3501 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n) | |
| 428 | 3502 { |
| 3425 | 3503 Extbyte *ascii = alloca_array (Extbyte, n + 1); |
| 3504 Extbyte *hex = alloca_array (Extbyte, 3 * n + 1); | |
| 771 | 3505 int i; |
| 3413 | 3506 DECLARE_EISTRING (eistr_ascii); |
| 3507 DECLARE_EISTRING (eistr_hex); | |
| 771 | 3508 |
| 3509 for (i = 0; i < n; i++) | |
| 428 | 3510 { |
| 3425 | 3511 Extbyte c = src[i]; |
| 771 | 3512 if (c < 0x20) |
| 3513 ascii[i] = '.'; | |
| 428 | 3514 else |
| 771 | 3515 ascii[i] = c; |
| 3516 hex[3 * i] = hex_digit_to_char (c >> 4); | |
| 3517 hex[3 * i + 1] = hex_digit_to_char (c & 0xF); | |
| 3518 hex[3 * i + 2] = ' '; | |
| 428 | 3519 } |
| 771 | 3520 ascii[i] = '\0'; |
| 3521 hex[3 * i - 1] = '\0'; | |
| 3413 | 3522 |
| 3523 eicpy_ext(eistr_hex, hex, Qbinary); | |
| 3524 eicpy_ext(eistr_ascii, ascii, Qbinary); | |
| 3525 | |
| 3425 | 3526 stderr_out ("%s %s", eidata(eistr_ascii), eidata(eistr_hex)); |
| 428 | 3527 } |
| 3528 | |
| 771 | 3529 #endif /* DEBUG_XEMACS */ |
| 3530 | |
| 3531 /* Attempt to determine the encoding of the given text. Before calling | |
| 3532 this function for the first time, you must zero out the detection state. | |
| 428 | 3533 |
| 3534 Returns: | |
| 3535 | |
| 771 | 3536 0 == keep going |
| 3537 1 == stop | |
| 428 | 3538 */ |
| 3539 | |
| 3540 static int | |
| 771 | 3541 detect_coding_type (struct detection_state *st, const UExtbyte *src, |
| 3542 Bytecount n) | |
| 428 | 3543 { |
| 771 | 3544 Bytecount n2 = n; |
| 3545 const UExtbyte *src2 = src; | |
| 3546 int i; | |
| 3547 | |
| 3548 #ifdef DEBUG_XEMACS | |
| 3549 if (!NILP (Vdebug_coding_detection)) | |
| 3550 { | |
| 3551 int bytes = min (16, n); | |
| 3552 stderr_out ("detect_coding_type: processing %ld bytes\n", n); | |
| 3553 stderr_out ("First %d: ", bytes); | |
| 3554 output_bytes_in_ascii_and_hex (src, bytes); | |
| 3555 stderr_out ("\nLast %d: ", bytes); | |
| 3556 output_bytes_in_ascii_and_hex (src + n - bytes, bytes); | |
| 3557 stderr_out ("\n"); | |
| 3558 } | |
| 3559 #endif /* DEBUG_XEMACS */ | |
| 428 | 3560 if (!st->seen_non_ascii) |
| 3561 { | |
| 771 | 3562 for (; n2; n2--, src2++) |
| 428 | 3563 { |
| 771 | 3564 UExtbyte c = *src2; |
| 428 | 3565 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80) |
| 3566 { | |
| 3567 st->seen_non_ascii = 1; | |
| 3568 break; | |
| 3569 } | |
| 3570 } | |
| 3571 } | |
| 3572 | |
| 771 | 3573 for (i = 0; i < coding_detector_count; i++) |
| 3574 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n); | |
| 3575 | |
| 3576 st->bytes_seen += n; | |
| 3577 | |
| 3578 #ifdef DEBUG_XEMACS | |
| 3579 if (!NILP (Vdebug_coding_detection)) | |
| 3580 { | |
| 3581 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii); | |
| 1494 | 3582 if (coding_detector_category_count <= 0) |
| 3583 stderr_out ("found %d detector categories\n", | |
| 3584 coding_detector_category_count); | |
| 771 | 3585 for (i = 0; i < coding_detector_category_count; i++) |
| 3586 stderr_out_lisp | |
| 3587 ("%s: %s\n", | |
| 3588 2, | |
| 3589 coding_category_id_to_symbol (i), | |
| 3590 detection_result_number_to_symbol ((enum detection_result) | |
| 3591 st->categories[i])); | |
| 3592 } | |
| 3593 #endif /* DEBUG_XEMACS */ | |
| 3594 | |
| 3595 { | |
| 3596 int not_unlikely = 0; | |
| 3597 int retval; | |
| 3598 | |
| 3599 for (i = 0; i < coding_detector_category_count; i++) | |
| 3600 if (st->categories[i] >= 0) | |
| 3601 not_unlikely++; | |
| 3602 | |
| 3603 retval = (not_unlikely <= 1 | |
| 3604 #if 0 /* this is bogus */ | |
| 3605 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION | |
| 428 | 3606 #endif |
| 771 | 3607 ); |
| 3608 | |
| 3609 #ifdef DEBUG_XEMACS | |
| 3610 if (!NILP (Vdebug_coding_detection)) | |
| 3611 stderr_out ("detect_coding_type: returning %d (%s)\n", | |
| 3612 retval, retval ? "stop" : "keep going"); | |
| 3613 #endif /* DEBUG_XEMACS */ | |
| 3614 | |
| 3615 return retval; | |
| 428 | 3616 } |
| 3617 } | |
| 3618 | |
| 3619 static Lisp_Object | |
| 771 | 3620 detected_coding_system (struct detection_state *st) |
| 428 | 3621 { |
| 771 | 3622 int i; |
| 3623 int even = 1; | |
| 3624 | |
| 3625 if (st->seen_non_ascii) | |
| 3626 { | |
| 3627 for (i = 0; i < coding_detector_category_count; i++) | |
| 3628 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY) | |
| 3629 { | |
| 3630 even = 0; | |
| 3631 break; | |
| 3632 } | |
| 3633 } | |
| 3634 | |
| 3635 /* #### Here we are ignoring the results of detection when it's all | |
| 3636 ASCII. This is obviously a bad thing. But we need to fix up the | |
| 3637 existing detection methods somewhat before we can switch. */ | |
| 3638 if (even) | |
| 428 | 3639 { |
| 3640 /* If the file was entirely or basically ASCII, use the | |
| 3641 default value of `buffer-file-coding-system'. */ | |
| 3642 Lisp_Object retval = | |
| 3643 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system; | |
| 3644 if (!NILP (retval)) | |
| 3645 { | |
| 771 | 3646 retval = find_coding_system_for_text_file (retval, 0); |
| 428 | 3647 if (NILP (retval)) |
| 3648 { | |
| 3649 warn_when_safe | |
| 3650 (Qbad_variable, Qwarning, | |
| 3651 "Invalid `default-buffer-file-coding-system', set to nil"); | |
| 3652 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil; | |
| 3653 } | |
| 3654 } | |
| 3655 if (NILP (retval)) | |
| 4100 | 3656 retval = Fget_coding_system (Qbinary); |
| 428 | 3657 return retval; |
| 3658 } | |
| 3659 else | |
| 3660 { | |
| 771 | 3661 int likelihood; |
| 3662 Lisp_Object retval = Qnil; | |
| 3663 | |
| 3664 /* Look through the coding categories first by likelihood and then by | |
| 3665 priority and find the first one that is allowed. */ | |
| 3666 | |
| 3667 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--) | |
| 428 | 3668 { |
| 771 | 3669 for (i = 0; i < coding_detector_category_count; i++) |
| 3670 { | |
| 3671 int cat = coding_category_by_priority[i]; | |
| 3672 if (st->categories[cat] == likelihood && | |
| 3673 !NILP (coding_category_system[cat])) | |
| 3674 { | |
| 3675 retval = (get_coding_system_for_text_file | |
| 3676 (coding_category_system[cat], 0)); | |
| 3677 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY) | |
| 3678 warn_when_safe_lispobj | |
| 3679 (intern ("detection"), | |
| 793 | 3680 Qwarning, |
| 771 | 3681 emacs_sprintf_string_lisp |
| 3682 ( | |
| 3683 "Detected coding %s is unlikely to be correct (likelihood == `%s')", | |
| 3684 Qnil, 2, XCODING_SYSTEM_NAME (retval), | |
| 3685 detection_result_number_to_symbol | |
| 3686 ((enum detection_result) likelihood))); | |
| 3687 return retval; | |
| 3688 } | |
| 3689 } | |
| 428 | 3690 } |
| 771 | 3691 |
| 3692 return Fget_coding_system (Qraw_text); | |
| 428 | 3693 } |
| 3694 } | |
| 3695 | |
| 1347 | 3696 /* Look for a coding system in the string (skipping over leading |
| 3697 blanks). If found, return it, otherwise nil. */ | |
| 3698 | |
| 3699 static Lisp_Object | |
| 2531 | 3700 snarf_coding_system (const UExtbyte *p, Bytecount len) |
| 1347 | 3701 { |
| 3702 Bytecount n; | |
| 2531 | 3703 UExtbyte *name; |
| 1347 | 3704 |
| 3705 while (*p == ' ' || *p == '\t') p++, len--; | |
| 3706 len = min (len, 1000); | |
| 3707 name = alloca_ibytes (len + 1); | |
| 3708 memcpy (name, p, len); | |
| 3709 name[len] = '\0'; | |
| 3710 | |
| 3711 /* Get coding system name */ | |
| 3712 /* Characters valid in a MIME charset name (rfc 1521), | |
| 3713 and in a Lisp symbol name. */ | |
| 3714 n = qxestrspn (name, | |
| 3715 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
| 3716 "abcdefghijklmnopqrstuvwxyz" | |
| 3717 "0123456789" | |
| 3718 "!$%&*+-.^_{|}~"); | |
| 3719 if (n > 0) | |
| 3720 { | |
| 3721 name[n] = '\0'; | |
| 2531 | 3722 /* This call to intern_int() is OK because we already verified that |
| 3723 there are only ASCII characters in the string */ | |
| 3724 return find_coding_system_for_text_file (intern_int ((Ibyte *) name), 0); | |
| 1347 | 3725 } |
| 3726 | |
| 3727 return Qnil; | |
| 3728 } | |
| 3729 | |
| 428 | 3730 /* Given a seekable read stream and potential coding system and EOL type |
| 3731 as specified, do any autodetection that is called for. If the | |
| 3732 coding system and/or EOL type are not `autodetect', they will be left | |
| 3733 alone; but this function will never return an autodetect coding system | |
| 3734 or EOL type. | |
| 3735 | |
| 3736 This function does not automatically fetch subsidiary coding systems; | |
| 3737 that should be unnecessary with the explicit eol-type argument. */ | |
| 3738 | |
| 3739 #define LENGTH(string_constant) (sizeof (string_constant) - 1) | |
| 3740 | |
| 771 | 3741 static Lisp_Object |
| 3742 unwind_free_detection_state (Lisp_Object opaque) | |
| 3743 { | |
| 3744 struct detection_state *st = | |
| 3745 (struct detection_state *) get_opaque_ptr (opaque); | |
| 3746 free_detection_state (st); | |
| 3747 free_opaque_ptr (opaque); | |
| 3748 return Qnil; | |
| 3749 } | |
| 3750 | |
| 1347 | 3751 /* #### This duplicates code in `find-coding-system-magic-cookie-in-file' |
| 3752 in files.el. Look into combining them. */ | |
| 3753 | |
| 771 | 3754 static Lisp_Object |
| 3755 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len) | |
| 428 | 3756 { |
| 771 | 3757 const UExtbyte *p; |
| 3758 const UExtbyte *scan_end; | |
| 2531 | 3759 Bytecount cookie_len; |
| 771 | 3760 |
| 3761 /* Look for initial "-*-"; mode line prefix */ | |
| 3762 for (p = data, | |
| 3763 scan_end = data + len - LENGTH ("-*-coding:?-*-"); | |
| 3764 p <= scan_end | |
| 3765 && *p != '\n' | |
| 3766 && *p != '\r'; | |
| 3767 p++) | |
| 3768 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3769 { | |
| 3770 const UExtbyte *local_vars_beg = p + 3; | |
| 3771 /* Look for final "-*-"; mode line suffix */ | |
| 3772 for (p = local_vars_beg, | |
| 3773 scan_end = data + len - LENGTH ("-*-"); | |
| 3774 p <= scan_end | |
| 428 | 3775 && *p != '\n' |
| 3776 && *p != '\r'; | |
| 771 | 3777 p++) |
| 3778 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3779 { | |
| 3780 const UExtbyte *suffix = p; | |
| 3781 /* Look for "coding:" */ | |
| 3782 for (p = local_vars_beg, | |
| 3783 scan_end = suffix - LENGTH ("coding:?"); | |
| 3784 p <= scan_end; | |
| 3785 p++) | |
| 3786 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0 | |
| 3787 && (p == local_vars_beg | |
| 3788 || (*(p-1) == ' ' || | |
| 3789 *(p-1) == '\t' || | |
| 3790 *(p-1) == ';'))) | |
| 3791 { | |
| 3792 p += LENGTH ("coding:"); | |
| 1347 | 3793 return snarf_coding_system (p, suffix - p); |
| 771 | 3794 break; |
| 3795 } | |
| 3796 break; | |
| 3797 } | |
| 3798 break; | |
| 3799 } | |
| 3800 | |
| 2531 | 3801 /* Look for ;;;###coding system */ |
| 3802 | |
| 3803 cookie_len = LENGTH (";;;###coding system: "); | |
| 3804 | |
| 3805 for (p = data, | |
| 3806 scan_end = data + len - cookie_len; | |
| 3807 p <= scan_end; | |
| 3808 p++) | |
| 1347 | 3809 { |
| 2531 | 3810 if (*p == ';' && !memcmp (p, ";;;###coding system: ", cookie_len)) |
| 3811 { | |
| 3812 const UExtbyte *suffix; | |
| 3813 | |
| 3814 p += cookie_len; | |
| 3815 suffix = p; | |
| 3816 while (suffix < scan_end && !isspace (*suffix)) | |
| 3817 suffix++; | |
| 3818 return snarf_coding_system (p, suffix - p); | |
| 3819 } | |
| 1347 | 3820 } |
| 3821 | |
| 3822 return Qnil; | |
| 771 | 3823 } |
| 3824 | |
| 3825 static Lisp_Object | |
| 3826 determine_real_coding_system (Lstream *stream) | |
| 3827 { | |
| 3828 struct detection_state *st = allocate_detection_state (); | |
| 3829 int depth = record_unwind_protect (unwind_free_detection_state, | |
| 3830 make_opaque_ptr (st)); | |
| 3831 UExtbyte buf[4096]; | |
| 3832 Bytecount nread = Lstream_read (stream, buf, sizeof (buf)); | |
| 3833 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread); | |
| 3834 | |
| 3835 if (NILP (coding_system)) | |
| 3836 { | |
| 3837 while (1) | |
| 3838 { | |
| 3839 if (detect_coding_type (st, buf, nread)) | |
| 428 | 3840 break; |
| 771 | 3841 nread = Lstream_read (stream, buf, sizeof (buf)); |
| 3842 if (nread == 0) | |
| 3843 break; | |
| 428 | 3844 } |
| 771 | 3845 |
| 3846 coding_system = detected_coding_system (st); | |
| 428 | 3847 } |
| 3848 | |
| 3849 Lstream_rewind (stream); | |
| 771 | 3850 |
| 3851 unbind_to (depth); | |
| 3852 return coding_system; | |
| 3853 } | |
| 3854 | |
| 3855 static void | |
| 3856 undecided_init_coding_stream (struct coding_stream *str) | |
| 3857 { | |
| 3858 struct undecided_coding_stream *data = | |
| 3859 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3860 struct undecided_coding_system *csdata = | |
| 3861 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3862 | |
| 3863 data->actual = Qnil; | |
| 3864 | |
| 3865 if (str->direction == CODING_DECODE) | |
| 3866 { | |
| 3867 Lstream *lst = str->other_end; | |
| 3868 | |
| 3869 if ((lst->flags & LSTREAM_FL_READ) && | |
| 3870 Lstream_seekable_p (lst) && | |
| 3871 csdata->do_coding) | |
| 3872 /* We can determine the coding system now. */ | |
| 3873 data->actual = determine_real_coding_system (lst); | |
| 3874 } | |
| 1494 | 3875 |
| 3876 #ifdef DEBUG_XEMACS | |
| 3877 if (!NILP (Vdebug_coding_detection)) | |
| 3878 stderr_out_lisp ("detected coding system: %s\n", 1, data->actual); | |
| 3879 #endif /* DEBUG_XEMACS */ | |
| 771 | 3880 } |
| 3881 | |
| 3882 static void | |
| 3883 undecided_rewind_coding_stream (struct coding_stream *str) | |
| 3884 { | |
| 3885 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3886 } | |
| 3887 | |
| 3888 static void | |
| 3889 undecided_finalize_coding_stream (struct coding_stream *str) | |
| 3890 { | |
| 3891 struct undecided_coding_stream *data = | |
| 3892 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3893 | |
| 3894 chain_finalize_coding_stream_1 | |
| 3895 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3896 if (data->st) | |
| 3897 free_detection_state (data->st); | |
| 3898 } | |
| 3899 | |
| 3900 static Lisp_Object | |
| 3901 undecided_canonicalize (Lisp_Object codesys) | |
| 3902 { | |
| 3903 struct undecided_coding_system *csdata = | |
| 3904 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3905 if (!csdata->do_eol && !csdata->do_coding) | |
| 3906 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs; | |
| 3907 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs)) | |
| 3908 return Fget_coding_system (Qconvert_eol_autodetect); | |
| 3909 return codesys; | |
| 3910 } | |
| 3911 | |
| 3912 static Bytecount | |
| 3913 undecided_convert (struct coding_stream *str, const UExtbyte *src, | |
| 3914 unsigned_char_dynarr *dst, Bytecount n) | |
| 3915 { | |
| 3916 int first_time = 0; | |
| 3917 | |
| 3918 if (str->direction == CODING_DECODE) | |
| 3919 { | |
| 3920 /* At this point, we have only the following possibilities: | |
| 3921 | |
| 3922 do_eol && do_coding | |
| 3923 do_coding only | |
| 3924 do_eol only and a coding system was specified | |
| 3925 | |
| 3926 Other possibilities are removed during undecided_canonicalize. | |
| 3927 | |
| 3928 Therefore, our substreams are either | |
| 3929 | |
| 3930 lstream_coding -> lstream_dynarr, or | |
| 3931 lstream_coding -> lstream_eol -> lstream_dynarr. | |
| 3932 */ | |
| 3933 struct undecided_coding_system *csdata = | |
| 3934 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3935 struct undecided_coding_stream *data = | |
| 3936 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3937 | |
| 3938 if (str->eof) | |
| 3939 { | |
| 3940 /* Each will close the next. We need to close now because more | |
| 3941 data may be generated. */ | |
| 3942 if (data->c.initted) | |
| 3943 Lstream_close (XLSTREAM (data->c.lstreams[0])); | |
| 3944 return n; | |
| 3945 } | |
| 3946 | |
| 3947 if (!data->c.initted) | |
| 3948 { | |
| 3949 data->c.lstream_count = csdata->do_eol ? 3 : 2; | |
| 3950 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count); | |
| 3951 | |
| 3952 data->c.lstreams[data->c.lstream_count - 1] = | |
| 3953 make_dynarr_output_stream (dst); | |
| 3954 Lstream_set_buffering | |
| 3955 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3956 LSTREAM_UNBUFFERED, 0); | |
| 3957 if (csdata->do_eol) | |
| 3958 { | |
| 3959 data->c.lstreams[1] = | |
| 3960 make_coding_output_stream | |
| 3961 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3962 Fget_coding_system (Qconvert_eol_autodetect), | |
| 800 | 3963 CODING_DECODE, 0); |
| 771 | 3964 Lstream_set_buffering |
| 3965 (XLSTREAM (data->c.lstreams[1]), | |
| 3966 LSTREAM_UNBUFFERED, 0); | |
| 3967 } | |
| 3968 | |
| 3969 data->c.lstreams[0] = | |
| 3970 make_coding_output_stream | |
| 3971 (XLSTREAM (data->c.lstreams[1]), | |
| 3972 /* Substitute binary if we need to detect the encoding */ | |
| 3973 csdata->do_coding ? Qbinary : csdata->cs, | |
| 800 | 3974 CODING_DECODE, 0); |
| 771 | 3975 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]), |
| 3976 LSTREAM_UNBUFFERED, 0); | |
| 3977 | |
| 3978 first_time = 1; | |
| 3979 data->c.initted = 1; | |
| 3980 } | |
| 3981 | |
| 3982 /* If necessary, do encoding-detection now. We do this when we're a | |
| 3983 writing stream or a non-seekable reading stream, meaning that we | |
| 3984 can't just process the whole input, rewind, and start over. */ | |
| 3985 | |
| 3986 if (csdata->do_coding) | |
| 3987 { | |
| 3988 int actual_was_nil = NILP (data->actual); | |
| 3989 if (NILP (data->actual)) | |
| 3990 { | |
| 3991 if (!data->st) | |
| 3992 data->st = allocate_detection_state (); | |
| 3993 if (first_time) | |
| 3994 /* #### This is cheesy. What we really ought to do is buffer | |
| 3995 up a certain minimum amount of data to get a better result. | |
| 3996 */ | |
| 3997 data->actual = look_for_coding_system_magic_cookie (src, n); | |
| 3998 if (NILP (data->actual)) | |
| 3999 { | |
| 4000 /* #### This is cheesy. What we really ought to do is buffer | |
| 4001 up a certain minimum amount of data so as to get a less | |
| 4002 random result when doing subprocess detection. */ | |
| 4003 detect_coding_type (data->st, src, n); | |
| 4004 data->actual = detected_coding_system (data->st); | |
| 4100 | 4005 /* kludge to prevent infinite recursion */ |
| 4006 if (XCODING_SYSTEM(data->actual)->methods->enumtype == undecided_coding_system) | |
| 4007 data->actual = Fget_coding_system (Qbinary); | |
| 771 | 4008 } |
| 4009 } | |
| 4010 /* We need to set the detected coding system if we actually have | |
| 4011 such a coding system but didn't before. That is the case | |
| 4012 either when we just detected it in the previous code or when | |
| 4013 it was detected during undecided_init_coding_stream(). We | |
| 4014 can check for that using first_time. */ | |
| 4015 if (!NILP (data->actual) && (actual_was_nil || first_time)) | |
| 4016 { | |
| 4017 /* If the detected coding system doesn't allow for EOL | |
| 4018 autodetection, try to get the equivalent that does; | |
| 4019 otherwise, disable EOL detection (overriding whatever | |
| 4020 may already have been detected). */ | |
| 4021 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT) | |
| 4022 { | |
| 4023 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual))) | |
| 4024 data->actual = | |
| 4025 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual); | |
| 4026 else if (data->c.lstream_count == 3) | |
| 4027 set_coding_stream_coding_system | |
| 4028 (XLSTREAM (data->c.lstreams[1]), | |
| 4029 Fget_coding_system (Qidentity)); | |
| 4030 } | |
| 4031 set_coding_stream_coding_system | |
| 4032 (XLSTREAM (data->c.lstreams[0]), data->actual); | |
| 4033 } | |
| 4034 } | |
| 4035 | |
| 4036 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0) | |
| 4037 return -1; | |
| 4038 return n; | |
| 4039 } | |
| 4040 else | |
| 4041 return no_conversion_convert (str, src, dst, n); | |
| 4042 } | |
| 4043 | |
| 4044 static Lisp_Object | |
| 4045 undecided_canonicalize_after_coding (struct coding_stream *str) | |
| 4046 { | |
| 4047 struct undecided_coding_stream *data = | |
| 4048 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 4049 Lisp_Object ret, eolret; | |
| 4050 | |
| 4051 if (str->direction == CODING_ENCODE) | |
| 4052 return str->codesys; | |
| 4053 | |
| 4054 if (!data->c.initted) | |
|
4647
e4ed58cb0e5b
Fix bugs with #'find-file, 0-length files, & coding-system-for-read specified.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4569
diff
changeset
|
4055 return str->codesys; |
| 771 | 4056 |
| 4057 ret = coding_stream_canonicalize_after_coding | |
| 4058 (XLSTREAM (data->c.lstreams[0])); | |
| 4059 if (NILP (ret)) | |
|
4647
e4ed58cb0e5b
Fix bugs with #'find-file, 0-length files, & coding-system-for-read specified.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4569
diff
changeset
|
4060 ret = str->codesys; |
| 771 | 4061 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT) |
| 4062 return ret; | |
| 4063 eolret = coding_stream_canonicalize_after_coding | |
| 4064 (XLSTREAM (data->c.lstreams[1])); | |
| 4065 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol)) | |
| 4066 return ret; | |
| 4067 return | |
| 4068 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret, | |
| 4069 Qsubtype)); | |
| 4070 } | |
| 4071 | |
| 4072 | |
| 4073 /************************************************************************/ | |
| 4074 /* Lisp interface: Coding category functions and detection */ | |
| 4075 /************************************************************************/ | |
| 4076 | |
| 4077 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /* | |
| 4078 Return a list of all recognized coding categories. | |
| 4079 */ | |
| 4080 ()) | |
| 4081 { | |
| 4082 int i; | |
| 4083 Lisp_Object list = Qnil; | |
| 4084 | |
| 4085 for (i = 0; i < coding_detector_count; i++) | |
| 4086 { | |
| 4087 detector_category_dynarr *cats = | |
| 4088 Dynarr_at (all_coding_detectors, i).cats; | |
| 4089 int j; | |
| 4090 | |
| 4091 for (j = 0; j < Dynarr_length (cats); j++) | |
| 4092 list = Fcons (Dynarr_at (cats, j).sym, list); | |
| 4093 } | |
| 4094 | |
| 4095 return Fnreverse (list); | |
| 4096 } | |
| 4097 | |
| 4098 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /* | |
| 4099 Change the priority order of the coding categories. | |
| 4100 LIST should be list of coding categories, in descending order of | |
| 4101 priority. Unspecified coding categories will be lower in priority | |
| 4102 than all specified ones, in the same relative order they were in | |
| 4103 previously. | |
| 4104 */ | |
| 4105 (list)) | |
| 4106 { | |
| 4107 int *category_to_priority = | |
| 4108 alloca_array (int, coding_detector_category_count); | |
| 4109 int i, j; | |
| 4110 | |
| 4111 /* First generate a list that maps coding categories to priorities. */ | |
| 4112 | |
| 4113 for (i = 0; i < coding_detector_category_count; i++) | |
| 4114 category_to_priority[i] = -1; | |
| 4115 | |
| 4116 /* Highest priority comes from the specified list. */ | |
| 4117 i = 0; | |
| 2367 | 4118 { |
| 4119 EXTERNAL_LIST_LOOP_2 (elt, list) | |
| 4120 { | |
| 4121 int cat = coding_category_symbol_to_id (elt); | |
| 4122 | |
| 4123 if (category_to_priority[cat] >= 0) | |
| 4124 sferror ("Duplicate coding category in list", elt); | |
| 4125 category_to_priority[cat] = i++; | |
| 4126 } | |
| 4127 } | |
| 771 | 4128 |
| 4129 /* Now go through the existing categories by priority to retrieve | |
| 4130 the categories not yet specified and preserve their priority | |
| 4131 order. */ | |
| 4132 for (j = 0; j < coding_detector_category_count; j++) | |
| 4133 { | |
| 4134 int cat = coding_category_by_priority[j]; | |
| 4135 if (category_to_priority[cat] < 0) | |
| 4136 category_to_priority[cat] = i++; | |
| 4137 } | |
| 4138 | |
| 4139 /* Now we need to construct the inverse of the mapping we just | |
| 4140 constructed. */ | |
| 4141 | |
| 4142 for (i = 0; i < coding_detector_category_count; i++) | |
| 4143 coding_category_by_priority[category_to_priority[i]] = i; | |
| 4144 | |
| 4145 /* Phew! That was confusing. */ | |
| 4146 return Qnil; | |
| 4147 } | |
| 4148 | |
| 4149 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /* | |
| 4150 Return a list of coding categories in descending order of priority. | |
| 4151 */ | |
| 4152 ()) | |
| 4153 { | |
| 4154 int i; | |
| 4155 Lisp_Object list = Qnil; | |
| 4156 | |
| 4157 for (i = 0; i < coding_detector_category_count; i++) | |
| 4158 list = | |
| 4159 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]), | |
| 4160 list); | |
| 4161 return Fnreverse (list); | |
| 4162 } | |
| 4163 | |
| 4164 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /* | |
| 4165 Change the coding system associated with a coding category. | |
| 4166 */ | |
| 4167 (coding_category, coding_system)) | |
| 4168 { | |
| 4169 coding_category_system[coding_category_symbol_to_id (coding_category)] = | |
| 4170 Fget_coding_system (coding_system); | |
| 4171 return Qnil; | |
| 4172 } | |
| 4173 | |
| 4174 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /* | |
| 4175 Return the coding system associated with a coding category. | |
| 4176 */ | |
| 4177 (coding_category)) | |
| 4178 { | |
| 4179 Lisp_Object sys = | |
| 4180 coding_category_system[coding_category_symbol_to_id (coding_category)]; | |
| 4181 | |
| 4182 if (!NILP (sys)) | |
| 4183 return XCODING_SYSTEM_NAME (sys); | |
| 4184 return Qnil; | |
| 4185 } | |
| 4186 | |
| 800 | 4187 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will |
| 4188 read through to the end of STREAM, leaving it there but open. */ | |
| 4189 | |
| 771 | 4190 Lisp_Object |
| 4191 detect_coding_stream (Lisp_Object stream) | |
| 4192 { | |
| 4193 Lisp_Object val = Qnil; | |
| 4194 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4195 UExtbyte random_buffer[65536]; | |
| 4196 Lisp_Object binary_instream = | |
| 4197 make_coding_input_stream | |
| 4198 (XLSTREAM (stream), Qbinary, | |
| 814 | 4199 CODING_ENCODE, LSTREAM_FL_NO_CLOSE_OTHER); |
| 771 | 4200 Lisp_Object decstream = |
| 4201 make_coding_input_stream | |
| 4202 (XLSTREAM (binary_instream), | |
| 800 | 4203 Qundecided, CODING_DECODE, 0); |
| 771 | 4204 Lstream *decstr = XLSTREAM (decstream); |
| 4205 | |
| 4206 GCPRO3 (decstream, stream, binary_instream); | |
| 4207 /* Read and discard all data; detection happens as a side effect of this, | |
| 4208 and we examine what was detected afterwards. */ | |
| 4209 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0) | |
| 4210 ; | |
| 4211 | |
| 4212 val = coding_stream_detected_coding_system (decstr); | |
| 4213 Lstream_close (decstr); | |
| 4214 Lstream_delete (decstr); | |
| 4215 Lstream_delete (XLSTREAM (binary_instream)); | |
| 4216 UNGCPRO; | |
| 4217 return val; | |
| 428 | 4218 } |
| 4219 | |
| 4220 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /* | |
| 4221 Detect coding system of the text in the region between START and END. | |
| 444 | 4222 Return a list of possible coding systems ordered by priority. |
| 3025 | 4223 If only ASCII characters are found, return `undecided' or one of |
| 428 | 4224 its subsidiary coding systems according to a detected end-of-line |
| 4225 type. Optional arg BUFFER defaults to the current buffer. | |
| 4226 */ | |
| 4227 (start, end, buffer)) | |
| 4228 { | |
| 4229 Lisp_Object val = Qnil; | |
| 4230 struct buffer *buf = decode_buffer (buffer, 0); | |
| 665 | 4231 Charbpos b, e; |
| 771 | 4232 Lisp_Object lb_instream; |
| 428 | 4233 |
| 4234 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 4235 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 771 | 4236 |
| 4237 val = detect_coding_stream (lb_instream); | |
| 4238 Lstream_delete (XLSTREAM (lb_instream)); | |
| 428 | 4239 return val; |
| 4240 } | |
| 4241 | |
| 4242 | |
| 771 | 4243 |
| 4244 #ifdef DEBUG_XEMACS | |
| 4245 | |
| 428 | 4246 /************************************************************************/ |
| 771 | 4247 /* Internal methods */ |
| 4248 /************************************************************************/ | |
| 4249 | |
| 4250 /* Raw (internally-formatted) data. */ | |
| 4251 DEFINE_CODING_SYSTEM_TYPE (internal); | |
| 428 | 4252 |
| 665 | 4253 static Bytecount |
| 2286 | 4254 internal_convert (struct coding_stream *UNUSED (str), const UExtbyte *src, |
| 771 | 4255 unsigned_char_dynarr *dst, Bytecount n) |
| 4256 { | |
| 4257 Bytecount orign = n; | |
| 4258 Dynarr_add_many (dst, src, n); | |
| 4259 return orign; | |
| 4260 } | |
| 4261 | |
| 4262 #endif /* DEBUG_XEMACS */ | |
| 4263 | |
| 4264 | |
| 4265 | |
| 4266 #ifdef HAVE_ZLIB | |
| 4267 | |
| 4268 /************************************************************************/ | |
| 4269 /* Gzip methods */ | |
| 4270 /************************************************************************/ | |
| 4271 | |
| 4272 struct gzip_coding_system | |
| 428 | 4273 { |
| 771 | 4274 int level; /* 0 through 9, or -1 for default */ |
| 4275 }; | |
| 4276 | |
| 4277 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4278 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4279 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4280 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4281 | |
| 4282 struct gzip_coding_stream | |
| 428 | 4283 { |
| 771 | 4284 z_stream stream; |
| 4285 int stream_initted; | |
| 4286 int reached_eof; /* #### this should be handled by the caller, once we | |
| 4287 return LSTREAM_EOF */ | |
| 4288 }; | |
| 4289 | |
| 1204 | 4290 static const struct memory_description |
| 771 | 4291 gzip_coding_system_description[] = { |
| 4292 { XD_END } | |
| 4293 }; | |
| 4294 | |
| 1204 | 4295 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (gzip); |
| 4296 | |
| 771 | 4297 enum source_sink_type |
| 4298 gzip_conversion_end_type (Lisp_Object codesys) | |
| 4299 { | |
| 4300 return DECODES_BYTE_TO_BYTE; | |
| 428 | 4301 } |
| 4302 | |
| 4303 static void | |
| 771 | 4304 gzip_init (Lisp_Object codesys) |
| 4305 { | |
| 4306 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); | |
| 4307 data->level = -1; | |
| 4308 } | |
| 4309 | |
| 4310 static void | |
| 4311 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 428 | 4312 { |
| 771 | 4313 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip); |
| 4314 | |
| 826 | 4315 write_c_string (printcharfun, "("); |
| 771 | 4316 if (data->level == -1) |
| 826 | 4317 write_c_string (printcharfun, "default"); |
| 771 | 4318 else |
| 4319 print_internal (make_int (data->level), printcharfun, 0); | |
| 826 | 4320 write_c_string (printcharfun, ")"); |
| 428 | 4321 } |
| 4322 | |
| 4323 static int | |
| 771 | 4324 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 428 | 4325 { |
| 771 | 4326 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); |
| 4327 | |
| 4328 if (EQ (key, Qlevel)) | |
| 428 | 4329 { |
| 771 | 4330 if (EQ (value, Qdefault)) |
| 4331 data->level = -1; | |
| 4332 else | |
| 428 | 4333 { |
| 771 | 4334 CHECK_INT (value); |
| 4335 check_int_range (XINT (value), 0, 9); | |
| 4336 data->level = XINT (value); | |
| 428 | 4337 } |
| 4338 } | |
| 4339 else | |
| 771 | 4340 return 0; |
| 4341 return 1; | |
| 428 | 4342 } |
| 4343 | |
| 4344 static Lisp_Object | |
| 771 | 4345 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop) |
| 428 | 4346 { |
| 771 | 4347 struct gzip_coding_system *data = |
| 4348 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip); | |
| 4349 | |
| 4350 if (EQ (prop, Qlevel)) | |
| 428 | 4351 { |
| 771 | 4352 if (data->level == -1) |
| 4353 return Qdefault; | |
| 4354 return make_int (data->level); | |
| 428 | 4355 } |
| 771 | 4356 |
| 4357 return Qunbound; | |
| 428 | 4358 } |
| 4359 | |
| 4360 static void | |
| 771 | 4361 gzip_init_coding_stream (struct coding_stream *str) |
| 428 | 4362 { |
| 771 | 4363 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4364 if (data->stream_initted) | |
| 428 | 4365 { |
| 771 | 4366 if (str->direction == CODING_DECODE) |
| 4367 inflateEnd (&data->stream); | |
| 4368 else | |
| 4369 deflateEnd (&data->stream); | |
| 4370 data->stream_initted = 0; | |
| 428 | 4371 } |
| 771 | 4372 data->reached_eof = 0; |
| 428 | 4373 } |
| 4374 | |
| 4375 static void | |
| 771 | 4376 gzip_rewind_coding_stream (struct coding_stream *str) |
| 428 | 4377 { |
| 771 | 4378 gzip_init_coding_stream (str); |
| 428 | 4379 } |
| 4380 | |
| 771 | 4381 static Bytecount |
| 4382 gzip_convert (struct coding_stream *str, | |
| 4383 const UExtbyte *src, | |
| 4384 unsigned_char_dynarr *dst, Bytecount n) | |
| 428 | 4385 { |
| 771 | 4386 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4387 int zerr; | |
| 4388 if (str->direction == CODING_DECODE) | |
| 428 | 4389 { |
| 771 | 4390 if (data->reached_eof) |
| 4391 return n; /* eat the data */ | |
| 4392 | |
| 4393 if (!data->stream_initted) | |
| 428 | 4394 { |
| 771 | 4395 xzero (data->stream); |
| 4396 if (inflateInit (&data->stream) != Z_OK) | |
| 4397 return LSTREAM_ERROR; | |
| 4398 data->stream_initted = 1; | |
| 428 | 4399 } |
| 771 | 4400 |
| 4401 data->stream.next_in = (Bytef *) src; | |
| 4402 data->stream.avail_in = n; | |
| 4403 | |
| 4404 /* Normally we stop when we've fed all data to the decompressor; but | |
| 4405 if we're at the end of the input, and the decompressor hasn't | |
| 4406 reported EOF, we need to keep going, as there might be more output | |
| 4407 to generate. Z_OK from the decompressor means input was processed | |
| 4408 or output was generated; if neither, we break out of the loop. | |
| 4409 Other return values are: | |
| 4410 | |
| 4411 Z_STREAM_END EOF from decompressor | |
| 4412 Z_DATA_ERROR Corrupted data | |
| 4413 Z_BUF_ERROR No progress possible (this should happen if | |
| 4414 we try to feed it an incomplete file) | |
| 4415 Z_MEM_ERROR Out of memory | |
| 4416 Z_STREAM_ERROR (should never happen) | |
| 4417 Z_NEED_DICT (#### when will this happen?) | |
| 4418 */ | |
| 4419 while (data->stream.avail_in > 0 || str->eof) | |
| 4420 { | |
| 4421 /* Reserve an output buffer of the same size as the input buffer; | |
| 4422 if that's not enough, we keep reserving the same size. */ | |
| 4423 Bytecount reserved = n; | |
| 4424 Dynarr_add_many (dst, 0, reserved); | |
| 4425 /* Careful here! Don't retrieve the pointer until after | |
| 4426 reserving the space, or it might be bogus */ | |
| 4427 data->stream.next_out = | |
| 4428 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4429 data->stream.avail_out = reserved; | |
| 4430 zerr = inflate (&data->stream, Z_NO_FLUSH); | |
| 4431 /* Lop off the unused portion */ | |
| 4432 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4433 if (zerr != Z_OK) | |
| 4434 break; | |
| 4435 } | |
| 4436 | |
| 4437 if (zerr == Z_STREAM_END) | |
| 4438 data->reached_eof = 1; | |
| 4439 | |
| 4440 if ((Bytecount) data->stream.avail_in < n) | |
| 4441 return n - data->stream.avail_in; | |
| 4442 | |
| 4443 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4444 return 0; | |
| 4445 | |
| 4446 return LSTREAM_ERROR; | |
| 428 | 4447 } |
| 4448 else | |
| 4449 { | |
| 771 | 4450 if (!data->stream_initted) |
| 4451 { | |
| 4452 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys); | |
| 4453 xzero (data->stream); | |
| 4454 if (deflateInit (&data->stream, | |
| 4455 level == -1 ? Z_DEFAULT_COMPRESSION : level) != | |
| 4456 Z_OK) | |
| 4457 return LSTREAM_ERROR; | |
| 4458 data->stream_initted = 1; | |
| 428 | 4459 } |
| 771 | 4460 |
| 4461 data->stream.next_in = (Bytef *) src; | |
| 4462 data->stream.avail_in = n; | |
| 4463 | |
| 4464 /* Normally we stop when we've fed all data to the compressor; but if | |
| 4465 we're at the end of the input, and the compressor hasn't reported | |
| 4466 EOF, we need to keep going, as there might be more output to | |
| 4467 generate. (To signal EOF on our end, we set the FLUSH parameter | |
| 4468 to Z_FINISH; when all data is output, Z_STREAM_END will be | |
| 4469 returned.) Z_OK from the compressor means input was processed or | |
| 4470 output was generated; if neither, we break out of the loop. Other | |
| 4471 return values are: | |
| 4472 | |
| 4473 Z_STREAM_END EOF from compressor | |
| 4474 Z_BUF_ERROR No progress possible (should never happen) | |
| 4475 Z_STREAM_ERROR (should never happen) | |
| 4476 */ | |
| 4477 while (data->stream.avail_in > 0 || str->eof) | |
| 4478 { | |
| 4479 /* Reserve an output buffer of the same size as the input buffer; | |
| 4480 if that's not enough, we keep reserving the same size. */ | |
| 4481 Bytecount reserved = n; | |
| 4482 Dynarr_add_many (dst, 0, reserved); | |
| 4483 /* Careful here! Don't retrieve the pointer until after | |
| 4484 reserving the space, or it might be bogus */ | |
| 4485 data->stream.next_out = | |
| 4486 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4487 data->stream.avail_out = reserved; | |
| 4488 zerr = | |
| 4489 deflate (&data->stream, | |
| 4490 str->eof ? Z_FINISH : Z_NO_FLUSH); | |
| 4491 /* Lop off the unused portion */ | |
| 4492 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4493 if (zerr != Z_OK) | |
| 4494 break; | |
| 4495 } | |
| 4496 | |
| 4497 if ((Bytecount) data->stream.avail_in < n) | |
| 4498 return n - data->stream.avail_in; | |
| 4499 | |
| 4500 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4501 return 0; | |
| 4502 | |
| 4503 return LSTREAM_ERROR; | |
| 428 | 4504 } |
| 4505 } | |
| 4506 | |
| 771 | 4507 #endif /* HAVE_ZLIB */ |
| 428 | 4508 |
| 4509 | |
| 4510 /************************************************************************/ | |
| 4511 /* Initialization */ | |
| 4512 /************************************************************************/ | |
| 4513 | |
| 4514 void | |
| 4515 syms_of_file_coding (void) | |
| 4516 { | |
| 442 | 4517 INIT_LRECORD_IMPLEMENTATION (coding_system); |
| 4518 | |
| 771 | 4519 DEFSUBR (Fvalid_coding_system_type_p); |
| 4520 DEFSUBR (Fcoding_system_type_list); | |
| 428 | 4521 DEFSUBR (Fcoding_system_p); |
| 4303 | 4522 DEFSUBR (Fautoload_coding_system); |
| 428 | 4523 DEFSUBR (Ffind_coding_system); |
| 4524 DEFSUBR (Fget_coding_system); | |
| 4525 DEFSUBR (Fcoding_system_list); | |
| 4526 DEFSUBR (Fcoding_system_name); | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4527 DEFSUBR (Fmake_coding_system_internal); |
| 428 | 4528 DEFSUBR (Fcopy_coding_system); |
| 440 | 4529 DEFSUBR (Fcoding_system_canonical_name_p); |
| 4530 DEFSUBR (Fcoding_system_alias_p); | |
| 4531 DEFSUBR (Fcoding_system_aliasee); | |
| 428 | 4532 DEFSUBR (Fdefine_coding_system_alias); |
| 4533 DEFSUBR (Fsubsidiary_coding_system); | |
| 771 | 4534 DEFSUBR (Fcoding_system_base); |
| 4535 DEFSUBR (Fcoding_system_used_for_io); | |
| 428 | 4536 |
| 4537 DEFSUBR (Fcoding_system_type); | |
| 771 | 4538 DEFSUBR (Fcoding_system_description); |
| 428 | 4539 DEFSUBR (Fcoding_system_property); |
| 4540 | |
| 4541 DEFSUBR (Fcoding_category_list); | |
| 4542 DEFSUBR (Fset_coding_priority_list); | |
| 4543 DEFSUBR (Fcoding_priority_list); | |
| 4544 DEFSUBR (Fset_coding_category_system); | |
| 4545 DEFSUBR (Fcoding_category_system); | |
| 4546 | |
| 4547 DEFSUBR (Fdetect_coding_region); | |
| 4548 DEFSUBR (Fdecode_coding_region); | |
| 4549 DEFSUBR (Fencode_coding_region); | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4550 DEFSUBR (Fquery_coding_region); |
| 563 | 4551 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp); |
| 4552 DEFSYMBOL (Qno_conversion); | |
| 771 | 4553 DEFSYMBOL (Qconvert_eol); |
| 4554 DEFSYMBOL (Qconvert_eol_autodetect); | |
| 4555 DEFSYMBOL (Qconvert_eol_lf); | |
| 4556 DEFSYMBOL (Qconvert_eol_cr); | |
| 4557 DEFSYMBOL (Qconvert_eol_crlf); | |
| 563 | 4558 DEFSYMBOL (Qraw_text); |
| 771 | 4559 |
| 563 | 4560 DEFSYMBOL (Qmnemonic); |
| 4561 DEFSYMBOL (Qeol_type); | |
| 4562 DEFSYMBOL (Qpost_read_conversion); | |
| 4563 DEFSYMBOL (Qpre_write_conversion); | |
| 4564 | |
| 771 | 4565 DEFSYMBOL (Qtranslation_table_for_decode); |
| 4566 DEFSYMBOL (Qtranslation_table_for_encode); | |
| 4567 DEFSYMBOL (Qsafe_chars); | |
| 4568 DEFSYMBOL (Qsafe_charsets); | |
| 4569 DEFSYMBOL (Qmime_charset); | |
| 4570 DEFSYMBOL (Qvalid_codes); | |
| 4571 | |
| 563 | 4572 DEFSYMBOL (Qcr); |
| 4573 DEFSYMBOL (Qlf); | |
| 4574 DEFSYMBOL (Qcrlf); | |
| 4575 DEFSYMBOL (Qeol_cr); | |
| 4576 DEFSYMBOL (Qeol_lf); | |
| 4577 DEFSYMBOL (Qeol_crlf); | |
| 4578 DEFSYMBOL (Qencode); | |
| 4579 DEFSYMBOL (Qdecode); | |
| 428 | 4580 |
| 771 | 4581 DEFSYMBOL (Qnear_certainty); |
| 4582 DEFSYMBOL (Qquite_probable); | |
| 4583 DEFSYMBOL (Qsomewhat_likely); | |
| 1494 | 4584 DEFSYMBOL (Qslightly_likely); |
| 771 | 4585 DEFSYMBOL (Qas_likely_as_unlikely); |
| 4586 DEFSYMBOL (Qsomewhat_unlikely); | |
| 4587 DEFSYMBOL (Qquite_improbable); | |
| 4588 DEFSYMBOL (Qnearly_impossible); | |
| 4589 | |
| 4590 DEFSYMBOL (Qdo_eol); | |
| 4591 DEFSYMBOL (Qdo_coding); | |
| 4592 | |
| 4593 DEFSYMBOL (Qcanonicalize_after_coding); | |
| 4594 | |
| 4303 | 4595 DEFSYMBOL (Qposix_charset_to_coding_system_hash); |
| 4596 | |
| 771 | 4597 DEFSYMBOL (Qescape_quoted); |
| 4598 | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4599 DEFSYMBOL (Qquery_coding_warning_face); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4600 DEFSYMBOL (Qaliases); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4601 DEFSYMBOL (Qcharset_skip_chars_string); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4602 |
| 771 | 4603 #ifdef HAVE_ZLIB |
| 4604 DEFSYMBOL (Qgzip); | |
| 4605 #endif | |
| 4606 | |
| 428 | 4607 } |
| 4608 | |
| 4609 void | |
| 4610 lstream_type_create_file_coding (void) | |
| 4611 { | |
| 771 | 4612 LSTREAM_HAS_METHOD (coding, reader); |
| 4613 LSTREAM_HAS_METHOD (coding, writer); | |
| 4614 LSTREAM_HAS_METHOD (coding, rewinder); | |
| 4615 LSTREAM_HAS_METHOD (coding, seekable_p); | |
| 4616 LSTREAM_HAS_METHOD (coding, marker); | |
| 4617 LSTREAM_HAS_METHOD (coding, flusher); | |
| 4618 LSTREAM_HAS_METHOD (coding, closer); | |
| 4619 LSTREAM_HAS_METHOD (coding, finalizer); | |
| 4620 } | |
| 4621 | |
| 4622 void | |
| 4623 coding_system_type_create (void) | |
| 4624 { | |
| 4625 int i; | |
| 4626 | |
| 4627 staticpro (&Vcoding_system_hash_table); | |
| 4628 Vcoding_system_hash_table = | |
| 4629 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ); | |
| 4630 | |
| 4631 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry); | |
| 2367 | 4632 dump_add_root_block_ptr (&the_coding_system_type_entry_dynarr, |
| 771 | 4633 &csted_description); |
| 4634 | |
| 4635 Vcoding_system_type_list = Qnil; | |
| 4636 staticpro (&Vcoding_system_type_list); | |
| 4637 | |
| 4638 /* Initialize to something reasonable ... */ | |
| 4639 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++) | |
| 4640 { | |
| 4641 coding_category_system[i] = Qnil; | |
| 1204 | 4642 dump_add_root_lisp_object (&coding_category_system[i]); |
| 771 | 4643 coding_category_by_priority[i] = i; |
| 4644 } | |
| 4645 | |
| 4646 dump_add_opaque (coding_category_by_priority, | |
| 4647 sizeof (coding_category_by_priority)); | |
| 4648 | |
| 4649 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector); | |
| 2367 | 4650 dump_add_root_block_ptr (&all_coding_detectors, |
| 771 | 4651 &detector_dynarr_description); |
| 4652 | |
| 4653 dump_add_opaque_int (&coding_system_tick); | |
| 4654 dump_add_opaque_int (&coding_detector_count); | |
| 4655 dump_add_opaque_int (&coding_detector_category_count); | |
| 4656 | |
| 4657 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion, | |
| 4658 "no-conversion-coding-system-p"); | |
| 4659 CODING_SYSTEM_HAS_METHOD (no_conversion, convert); | |
| 4660 | |
| 4661 INITIALIZE_DETECTOR (no_conversion); | |
| 4662 DETECTOR_HAS_METHOD (no_conversion, detect); | |
| 4663 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 4664 | |
| 4665 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol, | |
| 4666 "convert-eol-coding-system-p"); | |
| 4667 CODING_SYSTEM_HAS_METHOD (convert_eol, print); | |
| 4668 CODING_SYSTEM_HAS_METHOD (convert_eol, convert); | |
| 4669 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop); | |
| 4670 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop); | |
| 4671 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type); | |
| 4672 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding); | |
| 4673 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream); | |
| 4674 | |
| 4675 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided, | |
| 4676 "undecided-coding-system-p"); | |
| 4677 CODING_SYSTEM_HAS_METHOD (undecided, init); | |
| 4678 CODING_SYSTEM_HAS_METHOD (undecided, mark); | |
| 4679 CODING_SYSTEM_HAS_METHOD (undecided, print); | |
| 4680 CODING_SYSTEM_HAS_METHOD (undecided, convert); | |
| 4681 CODING_SYSTEM_HAS_METHOD (undecided, putprop); | |
| 4682 CODING_SYSTEM_HAS_METHOD (undecided, getprop); | |
| 4683 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream); | |
| 4684 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream); | |
| 4685 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream); | |
| 4686 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream); | |
| 4687 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize); | |
| 4688 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding); | |
| 4689 | |
| 4690 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p"); | |
| 4691 | |
| 4692 CODING_SYSTEM_HAS_METHOD (chain, print); | |
| 4693 CODING_SYSTEM_HAS_METHOD (chain, canonicalize); | |
| 4694 CODING_SYSTEM_HAS_METHOD (chain, init); | |
| 4695 CODING_SYSTEM_HAS_METHOD (chain, mark); | |
| 4696 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream); | |
| 4697 CODING_SYSTEM_HAS_METHOD (chain, convert); | |
| 4698 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream); | |
| 4699 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream); | |
| 4700 CODING_SYSTEM_HAS_METHOD (chain, finalize); | |
| 4701 CODING_SYSTEM_HAS_METHOD (chain, putprop); | |
| 4702 CODING_SYSTEM_HAS_METHOD (chain, getprop); | |
| 4703 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type); | |
| 4704 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding); | |
| 4705 | |
| 4706 #ifdef DEBUG_XEMACS | |
| 4707 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p"); | |
| 4708 CODING_SYSTEM_HAS_METHOD (internal, convert); | |
| 4709 #endif | |
| 4710 | |
| 4711 #ifdef HAVE_ZLIB | |
| 4712 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p"); | |
| 4713 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type); | |
| 4714 CODING_SYSTEM_HAS_METHOD (gzip, convert); | |
| 4715 CODING_SYSTEM_HAS_METHOD (gzip, init); | |
| 4716 CODING_SYSTEM_HAS_METHOD (gzip, print); | |
| 4717 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream); | |
| 4718 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream); | |
| 4719 CODING_SYSTEM_HAS_METHOD (gzip, putprop); | |
| 4720 CODING_SYSTEM_HAS_METHOD (gzip, getprop); | |
| 4721 #endif | |
| 4722 } | |
| 4723 | |
| 4724 void | |
| 4725 reinit_coding_system_type_create (void) | |
| 4726 { | |
| 4727 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion); | |
| 4728 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol); | |
| 4729 REINITIALIZE_CODING_SYSTEM_TYPE (undecided); | |
| 4730 REINITIALIZE_CODING_SYSTEM_TYPE (chain); | |
| 4731 #if 0 | |
| 4732 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper); | |
| 4733 #endif /* 0 */ | |
| 4734 #ifdef DEBUG_XEMACS | |
| 4735 REINITIALIZE_CODING_SYSTEM_TYPE (internal); | |
| 4736 #endif | |
| 4737 #ifdef HAVE_ZLIB | |
| 4738 REINITIALIZE_CODING_SYSTEM_TYPE (gzip); | |
| 4739 #endif | |
| 4740 } | |
| 4741 | |
| 4742 void | |
| 4743 reinit_vars_of_file_coding (void) | |
| 4744 { | |
| 428 | 4745 } |
| 4746 | |
| 4747 void | |
| 4748 vars_of_file_coding (void) | |
| 4749 { | |
| 771 | 4750 /* We always have file-coding support */ |
| 428 | 4751 Fprovide (intern ("file-coding")); |
| 4752 | |
| 1347 | 4753 QScoding_system_cookie = build_string (";;;###coding system: "); |
| 4754 staticpro (&QScoding_system_cookie); | |
| 4755 | |
| 1242 | 4756 #ifdef HAVE_DEFAULT_EOL_DETECTION |
| 2297 | 4757 /* #### Find a more appropriate place for this comment. |
| 4758 WARNING: The existing categories are intimately tied to the function | |
| 1242 | 4759 `coding-system-category' in coding.el. If you change a category, or |
| 4760 change the layout of any coding system associated with a category, you | |
| 4761 need to check that function and make sure it's written properly. */ | |
| 4762 | |
| 4763 Fprovide (intern ("unix-default-eol-detection")); | |
| 4764 #endif | |
| 4765 | |
| 428 | 4766 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /* |
| 3142 | 4767 Default coding system used for TTY and X11 keyboard input. |
| 4768 Under X11, used only to interpet the character for a key event when that | |
| 4769 event has a KeySym of NoSymbol but does have an associated string keysym, | |
| 4770 something that's seen with input methods. | |
| 4771 | |
| 4772 If you need to set these things to different coding systems, call the | |
| 4773 function `set-console-tty-coding-system' for the TTY and use this variable | |
| 4774 for X11. | |
| 428 | 4775 */ ); |
| 4776 Vkeyboard_coding_system = Qnil; | |
| 4777 | |
| 4778 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /* | |
| 4779 Coding system used for TTY display output. | |
| 4780 Not used under a windowing system. | |
| 4781 */ ); | |
| 4782 Vterminal_coding_system = Qnil; | |
| 4783 | |
| 4784 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /* | |
| 440 | 4785 Overriding coding system used when reading from a file or process. |
| 4786 You should bind this variable with `let', but do not set it globally. | |
| 4787 If this is non-nil, it specifies the coding system that will be used | |
| 4788 to decode input on read operations, such as from a file or process. | |
| 4789 It overrides `buffer-file-coding-system-for-read', | |
| 428 | 4790 `insert-file-contents-pre-hook', etc. Use those variables instead of |
| 440 | 4791 this one for permanent changes to the environment. */ ); |
| 428 | 4792 Vcoding_system_for_read = Qnil; |
| 4793 | |
| 4794 DEFVAR_LISP ("coding-system-for-write", | |
| 4795 &Vcoding_system_for_write /* | |
| 440 | 4796 Overriding coding system used when writing to a file or process. |
| 4797 You should bind this variable with `let', but do not set it globally. | |
| 4798 If this is non-nil, it specifies the coding system that will be used | |
| 4799 to encode output for write operations, such as to a file or process. | |
| 4800 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc. | |
| 4801 Use those variables instead of this one for permanent changes to the | |
| 4802 environment. */ ); | |
| 428 | 4803 Vcoding_system_for_write = Qnil; |
| 4804 | |
| 4805 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /* | |
| 4806 Coding system used to convert pathnames when accessing files. | |
| 4807 */ ); | |
| 4808 Vfile_name_coding_system = Qnil; | |
| 4809 | |
| 4810 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /* | |
| 771 | 4811 Setting this has no effect. It is purely for FSF compatibility. |
| 428 | 4812 */ ); |
| 4813 enable_multibyte_characters = 1; | |
| 771 | 4814 |
| 4815 Vchain_canonicalize_hash_table = | |
| 4816 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL); | |
| 4817 staticpro (&Vchain_canonicalize_hash_table); | |
| 4818 | |
| 4819 #ifdef DEBUG_XEMACS | |
| 4820 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /* | |
| 4821 If non-nil, display debug information about detection operations in progress. | |
| 4822 Information is displayed on stderr. | |
| 4823 */ ); | |
| 4824 Vdebug_coding_detection = Qnil; | |
| 4825 #endif | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4826 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4827 #ifdef MULE |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4828 Vdefault_query_coding_region_chartab_cache |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4829 = make_lisp_hash_table (25, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4830 staticpro (&Vdefault_query_coding_region_chartab_cache); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4831 #endif |
| 428 | 4832 } |
| 4833 | |
| 2297 | 4834 /* #### reformat this for consistent appearance? */ |
| 4835 | |
| 428 | 4836 void |
| 4837 complex_vars_of_file_coding (void) | |
| 4838 { | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4839 Fmake_coding_system_internal |
| 771 | 4840 (Qconvert_eol_cr, Qconvert_eol, |
| 4841 build_msg_string ("Convert CR to LF"), | |
| 4842 nconc2 (list6 (Qdocumentation, | |
| 4843 build_msg_string ( | |
| 4844 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4845 "(used internally and under Unix to mark the end of a line)."), | |
| 4846 Qmnemonic, build_string ("CR->LF"), | |
| 4847 Qsubtype, Qcr), | |
| 4848 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4849 subsidiaries -- it needs the coding systems we're creating | |
| 4850 to do so! */ | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4851 list4 (Qeol_type, Qlf, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4852 Qsafe_charsets, Qt))); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4853 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4854 Fmake_coding_system_internal |
| 771 | 4855 (Qconvert_eol_lf, Qconvert_eol, |
| 4856 build_msg_string ("Convert LF to LF (do nothing)"), | |
| 4857 nconc2 (list6 (Qdocumentation, | |
| 4858 build_msg_string ( | |
| 4859 "Do nothing."), | |
| 4860 Qmnemonic, build_string ("LF->LF"), | |
| 4861 Qsubtype, Qlf), | |
| 4862 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4863 subsidiaries -- it needs the coding systems we're creating | |
| 4864 to do so! */ | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4865 list4 (Qeol_type, Qlf, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4866 Qsafe_charsets, Qt))); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4867 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4868 Fmake_coding_system_internal |
| 771 | 4869 (Qconvert_eol_crlf, Qconvert_eol, |
| 4870 build_msg_string ("Convert CRLF to LF"), | |
| 4871 nconc2 (list6 (Qdocumentation, | |
| 4872 build_msg_string ( | |
| 4873 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4874 "(used internally and under Unix to mark the end of a line)."), | |
| 4875 Qmnemonic, build_string ("CRLF->LF"), | |
| 4876 Qsubtype, Qcrlf), | |
|
4690
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|
4877 |
| 771 | 4878 /* VERY IMPORTANT! Tell make-coding-system not to generate |
| 4879 subsidiaries -- it needs the coding systems we're creating | |
| 4880 to do so! */ | |
|
4690
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|
4881 list4 (Qeol_type, Qlf, |
|
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Move the #'query-coding-region implementation to C.
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|
4882 Qsafe_charsets, Qt))); |
|
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|
4883 |
|
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Move the #'query-coding-region implementation to C.
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|
4884 Fmake_coding_system_internal |
| 771 | 4885 (Qconvert_eol_autodetect, Qconvert_eol, |
| 4886 build_msg_string ("Autodetect EOL type"), | |
| 4887 nconc2 (list6 (Qdocumentation, | |
| 4888 build_msg_string ( | |
| 4889 "Autodetect the end-of-line type."), | |
| 4890 Qmnemonic, build_string ("Auto-EOL"), | |
| 793 | 4891 Qsubtype, Qnil), |
| 771 | 4892 /* VERY IMPORTANT! Tell make-coding-system not to generate |
| 4893 subsidiaries -- it needs the coding systems we're creating | |
| 4894 to do so! */ | |
|
4690
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Move the #'query-coding-region implementation to C.
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|
4895 list4 (Qeol_type, Qlf, |
|
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Move the #'query-coding-region implementation to C.
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4896 Qsafe_charsets, Qt))); |
|
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|
4897 |
|
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Move the #'query-coding-region implementation to C.
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|
4898 Fmake_coding_system_internal |
| 771 | 4899 (Qundecided, Qundecided, |
| 4900 build_msg_string ("Undecided (auto-detect)"), | |
| 4901 nconc2 (list4 (Qdocumentation, | |
| 4902 build_msg_string | |
| 4903 ("Automatically detects the correct encoding."), | |
| 4904 Qmnemonic, build_string ("Auto")), | |
| 4905 list6 (Qdo_eol, Qt, Qdo_coding, Qt, | |
| 4906 /* We do EOL detection ourselves so we don't need to be | |
| 4907 wrapped in an EOL detector. (It doesn't actually hurt, | |
| 4908 though, I don't think.) */ | |
| 4909 Qeol_type, Qlf))); | |
| 4910 | |
|
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4911 Fmake_coding_system_internal |
| 771 | 4912 (intern ("undecided-dos"), Qundecided, |
| 4913 build_msg_string ("Undecided (auto-detect) (CRLF)"), | |
| 4914 nconc2 (list4 (Qdocumentation, | |
| 4915 build_msg_string | |
| 4916 ("Automatically detects the correct encoding; EOL type of CRLF forced."), | |
| 4917 Qmnemonic, build_string ("Auto")), | |
| 4918 list4 (Qdo_coding, Qt, | |
| 4919 Qeol_type, Qcrlf))); | |
| 4920 | |
|
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|
4921 Fmake_coding_system_internal |
| 771 | 4922 (intern ("undecided-unix"), Qundecided, |
| 4923 build_msg_string ("Undecided (auto-detect) (LF)"), | |
| 4924 nconc2 (list4 (Qdocumentation, | |
| 4925 build_msg_string | |
| 4926 ("Automatically detects the correct encoding; EOL type of LF forced."), | |
| 4927 Qmnemonic, build_string ("Auto")), | |
| 4928 list4 (Qdo_coding, Qt, | |
| 4929 Qeol_type, Qlf))); | |
| 4930 | |
|
4690
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Aidan Kehoe <kehoea@parhasard.net>
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|
4931 Fmake_coding_system_internal |
| 771 | 4932 (intern ("undecided-mac"), Qundecided, |
| 4933 build_msg_string ("Undecided (auto-detect) (CR)"), | |
| 4934 nconc2 (list4 (Qdocumentation, | |
| 4935 build_msg_string | |
| 4936 ("Automatically detects the correct encoding; EOL type of CR forced."), | |
| 4937 Qmnemonic, build_string ("Auto")), | |
| 4938 list4 (Qdo_coding, Qt, | |
| 4939 Qeol_type, Qcr))); | |
| 4940 | |
| 428 | 4941 /* Need to create this here or we're really screwed. */ |
|
4690
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Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
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|
4942 Fmake_coding_system_internal |
| 428 | 4943 (Qraw_text, Qno_conversion, |
| 771 | 4944 build_msg_string ("Raw Text"), |
|
4690
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|
4945 nconc2 (list4 (Qdocumentation, |
|
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|
4946 build_msg_string ("Raw text converts only line-break " |
|
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|
4947 "codes, and acts otherwise like " |
|
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|
4948 "`binary'."), |
|
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|
4949 Qmnemonic, build_string ("Raw")), |
|
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|
4950 #ifdef MULE |
|
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|
4951 list2 (Qsafe_charsets, list3 (Vcharset_ascii, Vcharset_control_1, |
|
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4952 Vcharset_latin_iso8859_1)))); |
|
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|
4953 |
|
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|
4954 #else |
|
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|
4955 Qnil)); |
|
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4956 #endif |
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|
4957 |
|
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|
4958 Fmake_coding_system_internal |
| 428 | 4959 (Qbinary, Qno_conversion, |
| 771 | 4960 build_msg_string ("Binary"), |
|
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|
4961 nconc2 (list6 (Qdocumentation, |
|
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|
4962 build_msg_string ( |
| 771 | 4963 "This coding system is as close as it comes to doing no conversion.\n" |
| 4964 "On input, each byte is converted directly into the character\n" | |
| 4965 "with the corresponding code -- i.e. from the `ascii', `control-1',\n" | |
| 4966 "or `latin-1' character sets. On output, these characters are\n" | |
| 4967 "converted back to the corresponding bytes, and other characters\n" | |
| 4968 "are converted to the default character, i.e. `~'."), | |
|
4690
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|
4969 Qeol_type, Qlf, |
|
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|
4970 Qmnemonic, build_string ("Binary")), |
|
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|
4971 #ifdef MULE |
|
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|
4972 list2 (Qsafe_charsets, list3 (Vcharset_ascii, Vcharset_control_1, |
|
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|
4973 Vcharset_latin_iso8859_1)))); |
|
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|
4974 |
|
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|
4975 #else |
|
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|
4976 Qnil)); |
|
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|
4977 #endif |
| 428 | 4978 |
| 771 | 4979 /* Formerly aliased to raw-text! Completely bogus and not even the same |
| 4980 as FSF Emacs. */ | |
| 4981 Fdefine_coding_system_alias (Qno_conversion, Qbinary); | |
| 4982 Fdefine_coding_system_alias (intern ("no-conversion-unix"), | |
| 4983 intern ("raw-text-unix")); | |
| 4984 Fdefine_coding_system_alias (intern ("no-conversion-dos"), | |
| 4985 intern ("raw-text-dos")); | |
| 4986 Fdefine_coding_system_alias (intern ("no-conversion-mac"), | |
| 4987 intern ("raw-text-mac")); | |
| 4988 | |
| 1318 | 4989 /* These three below will get their defaults set correctly |
| 4990 in code-init.el. We init them now so we can handle stuff at dump | |
| 771 | 4991 time before we get to code-init.el. */ |
| 1318 | 4992 Fdefine_coding_system_alias (Qnative, Qbinary); |
| 440 | 4993 Fdefine_coding_system_alias (Qterminal, Qbinary); |
| 4994 Fdefine_coding_system_alias (Qkeyboard, Qbinary); | |
| 4995 | |
| 1318 | 4996 Fdefine_coding_system_alias (Qfile_name, Qnative); |
| 771 | 4997 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf); |
| 4998 | |
| 428 | 4999 /* Need this for bootstrapping */ |
| 771 | 5000 coding_category_system[detector_category_no_conversion] = |
| 428 | 5001 Fget_coding_system (Qraw_text); |
| 5002 } |