Mercurial > hg > xemacs-beta
annotate src/file-coding.c @ 4758:75975fd0b7fc
Implement more of the fontconfig API.
Improve implementation, avoiding nonsyntactic macros and compiler warnings.
Clean up some documentation.
Guard against freeing NULL pointers returned from fonconfig.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Wed, 18 Nov 2009 22:44:28 +0900 |
| parents | 257b468bf2ca |
| children | a9833e8a32ec e0db3c197671 |
| 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) | |
| 771 | 300 printing_unreadable_object |
| 301 ("printing unreadable object #<coding-system 0x%x>", c->header.uid); | |
| 302 | |
| 303 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name); | |
| 304 print_coding_system_properties (obj, printcharfun); | |
| 826 | 305 write_c_string (printcharfun, ">"); |
| 428 | 306 } |
| 307 | |
| 771 | 308 /* Print an abbreviated version of a coding system (but still containing |
| 309 all the information), for use within a coding system print method. */ | |
| 310 | |
| 311 static void | |
| 312 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun, | |
| 2286 | 313 int UNUSED (escapeflag)) |
| 771 | 314 { |
| 800 | 315 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs)); |
| 771 | 316 print_coding_system_properties (cs, printcharfun); |
| 826 | 317 write_c_string (printcharfun, "]"); |
| 771 | 318 } |
| 319 | |
| 3263 | 320 #ifndef NEW_GC |
| 428 | 321 static void |
| 322 finalize_coding_system (void *header, int for_disksave) | |
| 323 { | |
| 771 | 324 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header); |
| 428 | 325 /* Since coding systems never go away, this function is not |
| 326 necessary. But it would be necessary if we changed things | |
| 327 so that coding systems could go away. */ | |
| 328 if (!for_disksave) /* see comment in lstream.c */ | |
| 771 | 329 MAYBE_XCODESYSMETH (cs, finalize, (cs)); |
| 330 } | |
| 3263 | 331 #endif /* not NEW_GC */ |
| 771 | 332 |
| 333 static Bytecount | |
| 334 sizeof_coding_system (const void *header) | |
| 335 { | |
| 336 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header; | |
| 337 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size; | |
| 428 | 338 } |
| 339 | |
| 1204 | 340 static const struct memory_description coding_system_methods_description_1[] |
| 771 | 341 = { |
| 342 { XD_LISP_OBJECT, | |
| 343 offsetof (struct coding_system_methods, type) }, | |
| 344 { XD_LISP_OBJECT, | |
| 345 offsetof (struct coding_system_methods, predicate_symbol) }, | |
| 346 { XD_END } | |
| 347 }; | |
| 348 | |
| 1204 | 349 const struct sized_memory_description coding_system_methods_description = { |
| 771 | 350 sizeof (struct coding_system_methods), |
| 351 coding_system_methods_description_1 | |
| 352 }; | |
| 353 | |
| 1204 | 354 static const struct sized_memory_description coding_system_extra_description_map[] = |
| 355 { | |
| 356 { offsetof (Lisp_Coding_System, methods) }, | |
| 357 { offsetof (struct coding_system_methods, extra_description) }, | |
| 358 { -1 }, | |
| 771 | 359 }; |
| 360 | |
| 1204 | 361 static const struct memory_description coding_system_description[] = |
| 428 | 362 { |
| 2367 | 363 { XD_BLOCK_PTR, offsetof (Lisp_Coding_System, methods), 1, |
| 2551 | 364 { &coding_system_methods_description } }, |
| 1204 | 365 #define MARKED_SLOT(x) { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, x) }, |
| 366 #define MARKED_SLOT_ARRAY(slot, size) \ | |
| 367 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, slot), size }, | |
| 368 #include "coding-system-slots.h" | |
| 2367 | 369 { XD_BLOCK_ARRAY, offsetof (Lisp_Coding_System, data), 1, |
| 2551 | 370 { coding_system_extra_description_map } }, |
| 1204 | 371 { XD_END } |
| 771 | 372 }; |
| 373 | |
| 1204 | 374 static const struct memory_description coding_system_empty_extra_description_1[] = |
| 375 { | |
| 376 { XD_END } | |
| 377 }; | |
| 378 | |
| 379 const struct sized_memory_description coding_system_empty_extra_description = { | |
| 380 0, coding_system_empty_extra_description_1 | |
| 381 }; | |
| 382 | |
| 3263 | 383 #ifdef NEW_GC |
| 384 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system, | |
| 385 1, /*dumpable-flag*/ | |
| 386 mark_coding_system, | |
| 387 print_coding_system, | |
| 388 0, 0, 0, coding_system_description, | |
| 389 sizeof_coding_system, | |
| 390 Lisp_Coding_System); | |
| 391 #else /* not NEW_GC */ | |
| 934 | 392 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system, |
| 393 1, /*dumpable-flag*/ | |
| 394 mark_coding_system, | |
| 395 print_coding_system, | |
| 396 finalize_coding_system, | |
| 397 0, 0, coding_system_description, | |
| 398 sizeof_coding_system, | |
| 399 Lisp_Coding_System); | |
| 3263 | 400 #endif /* not NEW_GC */ |
| 771 | 401 |
| 402 /************************************************************************/ | |
| 403 /* Creating coding systems */ | |
| 404 /************************************************************************/ | |
| 405 | |
| 406 static struct coding_system_methods * | |
| 407 decode_coding_system_type (Lisp_Object type, Error_Behavior errb) | |
| 428 | 408 { |
| 771 | 409 int i; |
| 410 | |
| 411 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++) | |
| 428 | 412 { |
| 771 | 413 if (EQ (type, |
| 414 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type)) | |
| 415 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths; | |
| 428 | 416 } |
| 771 | 417 |
| 418 maybe_invalid_constant ("Invalid coding system type", type, | |
| 419 Qcoding_system, errb); | |
| 420 | |
| 421 return 0; | |
| 428 | 422 } |
| 423 | |
| 771 | 424 static int |
| 425 valid_coding_system_type_p (Lisp_Object type) | |
| 428 | 426 { |
| 771 | 427 return decode_coding_system_type (type, ERROR_ME_NOT) != 0; |
| 428 } | |
| 429 | |
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430 #ifdef MULE |
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431 static Lisp_Object Vdefault_query_coding_region_chartab_cache; |
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432 |
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433 /* Non-static because it's used in INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA. */ |
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434 Lisp_Object |
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435 default_query_method (Lisp_Object codesys, struct buffer *buf, |
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436 Charbpos end, int flags) |
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437 { |
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438 Charbpos pos = BUF_PT (buf), fail_range_start, fail_range_end; |
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439 Charbpos pos_byte = BYTE_BUF_PT (buf); |
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440 Lisp_Object safe_charsets = XCODING_SYSTEM_SAFE_CHARSETS (codesys); |
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441 Lisp_Object safe_chars = XCODING_SYSTEM_SAFE_CHARS (codesys), |
|
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Move the #'query-coding-region implementation to C.
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diff
changeset
|
442 result = Qnil; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
443 enum query_coding_failure_reasons failed_reason, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
444 previous_failed_reason = query_coding_succeeded; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
445 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
446 /* 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
|
447 if (EQ (Qnil, safe_chars)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
448 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
449 if (EQ (Qt, safe_charsets)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
450 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
451 return Qnil; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
452 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
453 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
454 /* 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
|
455 encode, give up. */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
456 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
|
457 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
458 return Qunbound; |
|
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Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
459 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
460 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
461 safe_chars = Fgethash (safe_charsets, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
462 Vdefault_query_coding_region_chartab_cache, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
463 Qnil); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
464 if (NILP (safe_chars)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
465 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
466 safe_chars = Fmake_char_table (Qgeneric); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
467 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
468 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
|
469 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
|
470 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
471 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
472 Fputhash (safe_charsets, safe_chars, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
473 Vdefault_query_coding_region_chartab_cache); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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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.
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parents:
4647
diff
changeset
|
476 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
477 if (flags & QUERY_METHOD_HIGHLIGHT && |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
478 /* 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
|
479 cleared properly: */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
480 !(UNBOUNDP (XSYMBOL (Qquery_coding_clear_highlights)->function))) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
481 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
482 /* 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
|
483 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
|
484 reachable from its entry in |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
485 Vdefault_query_coding_region_chartab_cache */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
486 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
|
487 wrap_buffer (buf)); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
488 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
489 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
490 while (pos < end) |
|
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Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
491 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
492 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
|
493 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
|
494 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
495 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
496 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
497 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
498 else |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
499 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
500 fail_range_start = pos; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
501 while ((pos < end) && |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
502 (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
|
503 && (failed_reason = query_coding_unencodable)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
504 && (previous_failed_reason == query_coding_succeeded |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
505 || previous_failed_reason == failed_reason)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
506 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
507 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
508 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
509 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
|
510 previous_failed_reason = failed_reason; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
511 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
512 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
513 if (fail_range_start == pos) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
514 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
515 /* The character can actually be encoded; move on. */ |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
516 pos++; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
517 INC_BYTEBPOS (buf, pos_byte); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
518 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
519 else |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
520 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
521 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
|
522 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
523 if (flags & QUERY_METHOD_ERRORP) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
524 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
525 DECLARE_EISTRING (error_details); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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parents:
4647
diff
changeset
|
526 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
527 eicpy_ascii (error_details, "Cannot encode "); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
528 eicat_lstr (error_details, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
529 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
|
530 pos - |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
531 fail_range_start)); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
532 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
|
533 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
534 signal_error (Qtext_conversion_error, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
535 (const CIbyte *)(eidata (error_details)), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
536 XCODING_SYSTEM_NAME (codesys)); |
|
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 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
539 if (NILP (result)) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
540 { |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
541 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
|
542 } |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
543 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
544 fail_range_end = pos; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
545 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
546 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
|
547 make_int (fail_range_end), |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
548 Qunencodable, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
549 result); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
550 previous_failed_reason = query_coding_succeeded; |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
551 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
552 if (flags & QUERY_METHOD_HIGHLIGHT) |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
553 { |
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554 Lisp_Object extent |
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555 = Fmake_extent (make_int (fail_range_start), |
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556 make_int (fail_range_end), |
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557 wrap_buffer (buf)); |
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558 |
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559 Fset_extent_priority |
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560 (extent, make_int (2 + mouse_highlight_priority)); |
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561 Fset_extent_face (extent, Qquery_coding_warning_face); |
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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 |
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567 return result; |
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568 } |
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569 #else |
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570 Lisp_Object |
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571 default_query_method (Lisp_Object UNUSED (codesys), |
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572 struct buffer * UNUSED (buf), |
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573 Charbpos UNUSED (end), int UNUSED (flags)) |
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574 { |
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575 return Qnil; |
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576 } |
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577 #endif /* defined MULE */ |
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578 |
| 771 | 579 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /* |
| 580 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid. | |
| 581 Valid types depend on how XEmacs was compiled but may include | |
| 3025 | 582 `undecided', `chain', `integer', `ccl', `iso2022', `big5', `shift-jis', |
| 583 `utf-16', `ucs-4', `utf-8', etc. | |
| 771 | 584 */ |
| 585 (coding_system_type)) | |
| 586 { | |
| 587 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil; | |
| 588 } | |
| 589 | |
| 590 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /* | |
| 591 Return a list of valid coding system types. | |
| 592 */ | |
| 593 ()) | |
| 594 { | |
| 595 return Fcopy_sequence (Vcoding_system_type_list); | |
| 596 } | |
| 597 | |
| 598 void | |
| 599 add_entry_to_coding_system_type_list (struct coding_system_methods *meths) | |
| 600 { | |
| 601 struct coding_system_type_entry entry; | |
| 602 | |
| 603 entry.meths = meths; | |
| 604 Dynarr_add (the_coding_system_type_entry_dynarr, entry); | |
| 605 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list); | |
| 428 | 606 } |
| 607 | |
| 608 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /* | |
| 609 Return t if OBJECT is a coding system. | |
| 610 A coding system is an object that defines how text containing multiple | |
| 611 character sets is encoded into a stream of (typically 8-bit) bytes. | |
| 612 The coding system is used to decode the stream into a series of | |
| 613 characters (which may be from multiple charsets) when the text is read | |
| 614 from a file or process, and is used to encode the text back into the | |
| 615 same format when it is written out to a file or process. | |
| 616 | |
| 617 For example, many ISO2022-compliant coding systems (such as Compound | |
| 618 Text, which is used for inter-client data under the X Window System) | |
| 619 use escape sequences to switch between different charsets -- Japanese | |
| 620 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked | |
| 621 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See | |
| 622 `make-coding-system' for more information. | |
| 623 | |
| 624 Coding systems are normally identified using a symbol, and the | |
| 625 symbol is accepted in place of the actual coding system object whenever | |
| 626 a coding system is called for. (This is similar to how faces work.) | |
| 627 */ | |
| 628 (object)) | |
| 629 { | |
| 630 return CODING_SYSTEMP (object) ? Qt : Qnil; | |
| 631 } | |
| 632 | |
| 4303 | 633 static Lisp_Object |
| 634 find_coding_system (Lisp_Object coding_system_or_name, | |
| 635 int do_autoloads) | |
| 636 { | |
| 637 Lisp_Object lookup; | |
| 638 | |
| 639 if (NILP (coding_system_or_name)) | |
| 640 coding_system_or_name = Qbinary; | |
| 641 else if (CODING_SYSTEMP (coding_system_or_name)) | |
| 642 return coding_system_or_name; | |
| 643 else | |
| 644 CHECK_SYMBOL (coding_system_or_name); | |
| 645 | |
| 646 while (1) | |
| 647 { | |
| 648 lookup = | |
| 649 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil); | |
| 650 | |
| 651 if (CONSP (lookup) && do_autoloads) | |
| 652 { | |
| 653 struct gcpro gcpro1; | |
| 654 int length; | |
| 655 DECLARE_EISTRING (desired_base); | |
| 656 DECLARE_EISTRING (warning_info); | |
| 657 | |
| 658 eicpy_lstr (desired_base, XSYMBOL_NAME (coding_system_or_name)); | |
| 659 | |
| 660 /* Work out the name of the base coding system. */ | |
| 661 length = eilen (desired_base); | |
| 662 if (length > (int)(sizeof ("-unix") - 1)) | |
| 663 { | |
| 664 if (0 == qxestrcmp ((UAscbyte *)"-unix", (eidata (desired_base)) | |
| 665 + (length - (sizeof ("-unix") - 1)))) | |
| 666 { | |
| 667 eidel (desired_base, length - (sizeof ("-unix") - 1), | |
| 668 -1, 5, 5); | |
| 669 } | |
| 670 } | |
| 671 else if (length > (int)(sizeof ("-dos") - 1)) | |
| 672 { | |
| 673 if ((0 == qxestrcmp ((UAscbyte *)"-dos", (eidata (desired_base)) | |
| 674 + (length - (sizeof ("-dos") - 1)))) || | |
| 675 (0 == qxestrcmp ((UAscbyte *)"-mac", (eidata (desired_base)) | |
| 676 + (length - (sizeof ("-mac") - 1))))) | |
| 677 { | |
| 678 eidel (desired_base, length - (sizeof ("-dos") - 1), -1, | |
| 679 4, 4); | |
| 680 } | |
| 681 } | |
| 682 | |
| 683 coding_system_or_name = intern_int (eidata (desired_base)); | |
| 684 | |
| 685 /* Remove this coding system and its subsidiary coding | |
| 686 systems from the hash, to avoid calling this code recursively. */ | |
| 687 Fremhash (coding_system_or_name, Vcoding_system_hash_table); | |
| 688 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-unix"), | |
| 689 Vcoding_system_hash_table); | |
| 690 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-dos"), | |
| 691 Vcoding_system_hash_table); | |
| 692 Fremhash (add_suffix_to_symbol(coding_system_or_name, "-mac"), | |
| 693 Vcoding_system_hash_table); | |
| 694 | |
| 695 eicpy_ascii (warning_info, "Error autoloading coding system "); | |
| 696 eicat_lstr (warning_info, XSYMBOL_NAME (coding_system_or_name)); | |
| 697 | |
| 698 /* Keep around the form so it doesn't disappear from under | |
| 699 #'eval's feet. */ | |
| 700 GCPRO1 (lookup); | |
| 701 call1_trapping_problems ((const CIbyte *)eidata (warning_info), | |
| 702 Qeval, lookup, 0); | |
| 703 UNGCPRO; | |
| 704 | |
| 705 lookup = | |
| 706 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil); | |
| 707 } | |
| 708 | |
| 709 if (CODING_SYSTEMP (lookup) || NILP (lookup)) | |
| 710 return lookup; | |
| 711 | |
| 712 coding_system_or_name = lookup; | |
| 713 } | |
| 714 } | |
| 715 | |
| 428 | 716 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /* |
| 717 Retrieve the coding system of the given name. | |
| 718 | |
| 719 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply | |
| 720 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol. | |
| 721 If there is no such coding system, nil is returned. Otherwise the | |
| 722 associated coding system object is returned. | |
| 723 */ | |
| 724 (coding_system_or_name)) | |
| 725 { | |
| 4303 | 726 return find_coding_system(coding_system_or_name, 1); |
| 727 } | |
| 728 | |
| 729 DEFUN ("autoload-coding-system", Fautoload_coding_system, 2, 2, 0, /* | |
| 730 Define SYMBOL as a coding-system that is loaded on demand. | |
| 731 | |
| 732 FORM is a form to evaluate to define the coding-system. | |
| 733 */ | |
| 734 (symbol, form)) | |
| 735 { | |
| 736 Lisp_Object lookup; | |
| 737 | |
| 738 CHECK_SYMBOL (symbol); | |
| 739 CHECK_CONS (form); | |
| 740 | |
| 741 lookup = find_coding_system (symbol, 0); | |
| 742 | |
| 743 if (!NILP (lookup) && | |
| 744 /* Allow autoloads to be redefined. */ | |
| 745 !CONSP (lookup)) | |
| 440 | 746 { |
| 4303 | 747 invalid_operation ("Cannot redefine existing coding system", |
| 748 symbol); | |
| 440 | 749 } |
| 4303 | 750 |
| 751 Fputhash (symbol, form, Vcoding_system_hash_table); | |
| 752 Fputhash (add_suffix_to_symbol(symbol, "-unix"), form, | |
| 753 Vcoding_system_hash_table); | |
| 754 Fputhash (add_suffix_to_symbol(symbol, "-dos"), form, | |
| 755 Vcoding_system_hash_table); | |
| 756 Fputhash (add_suffix_to_symbol(symbol, "-mac"), form, | |
| 757 Vcoding_system_hash_table); | |
| 758 | |
| 759 /* Tell the POSIX locale infrastructure about this coding system (though | |
| 760 unfortunately it'll be too late for the startup locale sniffing. */ | |
| 761 if (!UNBOUNDP (Qposix_charset_to_coding_system_hash)) | |
| 762 { | |
| 763 Lisp_Object val = Fsymbol_value (Qposix_charset_to_coding_system_hash); | |
| 764 DECLARE_EISTRING (minimal_name); | |
| 765 Ibyte *full_name; | |
| 766 int len = XSTRING_LENGTH (XSYMBOL_NAME (symbol)), i; | |
| 767 | |
| 768 if (!NILP (val)) | |
| 769 { | |
| 770 full_name = XSTRING_DATA (XSYMBOL_NAME (symbol)); | |
| 771 for (i = 0; i < len; ++i) | |
| 772 { | |
| 773 if (full_name[i] >= '0' && full_name[i] <= '9') | |
| 774 { | |
| 775 eicat_ch (minimal_name, full_name[i]); | |
| 776 } | |
| 777 else if (full_name[i] >= 'a' && full_name[i] <= 'z') | |
| 778 { | |
| 779 eicat_ch (minimal_name, full_name[i]); | |
| 780 } | |
| 781 else if (full_name[i] >= 'A' && full_name[i] <= 'Z') | |
| 782 { | |
| 783 eicat_ch (minimal_name, full_name[i] + | |
| 784 ('a' - 'A')); | |
| 785 } | |
| 786 } | |
| 787 | |
| 788 if (eilen (minimal_name)) | |
| 789 { | |
| 790 CHECK_HASH_TABLE (val); | |
| 791 Fputhash (eimake_string(minimal_name), symbol, val); | |
| 792 } | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 return Qt; | |
| 428 | 797 } |
| 798 | |
| 799 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /* | |
| 800 Retrieve the coding system of the given name. | |
| 801 Same as `find-coding-system' except that if there is no such | |
| 802 coding system, an error is signaled instead of returning nil. | |
| 803 */ | |
| 804 (name)) | |
| 805 { | |
| 806 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 807 | |
| 808 if (NILP (coding_system)) | |
| 563 | 809 invalid_argument ("No such coding system", name); |
| 428 | 810 return coding_system; |
| 811 } | |
| 812 | |
| 771 | 813 int |
| 814 coding_system_is_binary (Lisp_Object coding_system) | |
| 815 { | |
| 816 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 817 return | |
| 818 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) && | |
| 819 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF && | |
| 820 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) && | |
| 821 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil)); | |
| 822 } | |
| 823 | |
| 824 static Lisp_Object | |
| 825 coding_system_real_canonical (Lisp_Object cs) | |
| 826 { | |
| 827 if (!NILP (XCODING_SYSTEM_CANONICAL (cs))) | |
| 828 return XCODING_SYSTEM_CANONICAL (cs); | |
| 829 return cs; | |
| 830 } | |
| 831 | |
| 832 /* Return true if coding system is of the "standard" type that decodes | |
| 833 bytes into characters (suitable for decoding a text file). */ | |
| 834 int | |
| 835 coding_system_is_for_text_file (Lisp_Object coding_system) | |
| 836 { | |
| 837 return (XCODESYSMETH_OR_GIVEN | |
| 838 (coding_system, conversion_end_type, | |
| 839 (coding_system_real_canonical (coding_system)), | |
| 840 DECODES_BYTE_TO_CHARACTER) == | |
| 841 DECODES_BYTE_TO_CHARACTER); | |
| 842 } | |
| 843 | |
| 844 static int | |
| 845 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 846 { | |
| 847 enum source_sink_type type = | |
| 848 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type, | |
| 849 (coding_system_real_canonical (cs)), | |
| 850 DECODES_BYTE_TO_CHARACTER); | |
| 851 if (sex == CODING_SOURCE) | |
| 852 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 853 type == DECODES_CHARACTER_TO_BYTE); | |
| 854 else | |
| 855 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 856 type == DECODES_BYTE_TO_CHARACTER); | |
| 857 } | |
| 858 | |
| 859 static int | |
| 860 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 861 { | |
| 862 return decoding_source_sink_type_is_char (cs, | |
| 863 /* Sex change */ | |
| 864 sex == CODING_SOURCE ? | |
| 865 CODING_SINK : CODING_SOURCE); | |
| 866 } | |
| 867 | |
| 868 /* Like Ffind_coding_system() but check that the coding system is of the | |
| 869 "standard" type that decodes bytes into characters (suitable for | |
| 870 decoding a text file), and if not, returns an appropriate wrapper that | |
| 871 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 872 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 873 system to do this. */ | |
| 874 | |
| 875 Lisp_Object | |
| 876 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 877 { | |
| 878 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 879 Lisp_Object wrapper = coding_system; | |
| 880 | |
| 881 if (NILP (coding_system)) | |
| 882 return Qnil; | |
| 883 if (!coding_system_is_for_text_file (coding_system)) | |
| 884 { | |
| 885 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system); | |
| 886 if (NILP (wrapper)) | |
| 887 { | |
| 888 Lisp_Object chain; | |
| 889 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK)) | |
| 890 chain = list2 (coding_system, Qbinary); | |
| 891 else | |
| 892 chain = list1 (coding_system); | |
| 893 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE)) | |
| 894 chain = Fcons (Qbinary, chain); | |
| 895 wrapper = | |
| 896 make_internal_coding_system | |
| 897 (coding_system, | |
| 898 "internal-text-file-wrapper", | |
| 899 Qchain, | |
| 900 Qunbound, list4 (Qchain, chain, | |
| 901 Qcanonicalize_after_coding, coding_system)); | |
| 902 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper; | |
| 903 } | |
| 904 } | |
| 905 | |
| 906 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT) | |
| 907 return wrapper; | |
| 908 | |
| 909 coding_system = wrapper; | |
| 910 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system); | |
| 911 if (!NILP (wrapper)) | |
| 912 return wrapper; | |
| 913 wrapper = | |
| 914 make_internal_coding_system | |
| 915 (coding_system, | |
| 916 "internal-auto-eol-wrapper", | |
| 917 Qundecided, Qunbound, | |
| 918 list4 (Qcoding_system, coding_system, | |
| 919 Qdo_eol, Qt)); | |
| 920 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper; | |
| 921 return wrapper; | |
| 922 } | |
| 923 | |
| 924 /* Like Fget_coding_system() but verify that the coding system is of the | |
| 925 "standard" type that decodes bytes into characters (suitable for | |
| 926 decoding a text file), and if not, returns an appropriate wrapper that | |
| 927 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 928 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 929 system to do this. */ | |
| 930 | |
| 931 Lisp_Object | |
| 932 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 933 { | |
| 934 Lisp_Object coding_system = find_coding_system_for_text_file (name, | |
| 935 eol_wrap); | |
| 936 if (NILP (coding_system)) | |
| 937 invalid_argument ("No such coding system", name); | |
| 938 return coding_system; | |
| 939 } | |
| 940 | |
| 941 /* We store the coding systems in hash tables with the names as the | |
| 942 key and the actual coding system object as the value. Occasionally | |
| 943 we need to use them in a list format. These routines provide us | |
| 944 with that. */ | |
| 428 | 945 struct coding_system_list_closure |
| 946 { | |
| 947 Lisp_Object *coding_system_list; | |
| 771 | 948 int normal; |
| 949 int internal; | |
| 428 | 950 }; |
| 951 | |
| 952 static int | |
| 4303 | 953 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value, |
| 428 | 954 void *coding_system_list_closure) |
| 955 { | |
| 956 /* This function can GC */ | |
| 957 struct coding_system_list_closure *cscl = | |
| 958 (struct coding_system_list_closure *) coding_system_list_closure; | |
| 959 Lisp_Object *coding_system_list = cscl->coding_system_list; | |
| 960 | |
| 771 | 961 /* We can't just use VALUE because KEY might be an alias, and we need |
| 4303 | 962 the real coding system object. |
| 963 | |
| 964 Autoloaded coding systems have conses for their values, and can't be | |
| 965 internal coding systems, or coding system aliases. */ | |
| 966 if (CONSP (value) || | |
| 967 (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ? | |
| 968 cscl->internal : cscl->normal)) | |
| 771 | 969 *coding_system_list = Fcons (key, *coding_system_list); |
| 428 | 970 return 0; |
| 971 } | |
| 972 | |
| 2297 | 973 /* #### should we specify a conventional for "all coding systems"? */ |
| 771 | 974 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /* |
| 428 | 975 Return a list of the names of all defined coding systems. |
| 771 | 976 If INTERNAL is nil, only the normal (non-internal) coding systems are |
| 977 included. (Internal coding systems are created for various internal | |
| 978 purposes, such as implementing EOL types of CRLF and CR; generally, you do | |
| 979 not want to see these.) If it is t, only the internal coding systems are | |
| 980 included. If it is any other non-nil value both normal and internal are | |
| 981 included. | |
| 428 | 982 */ |
| 771 | 983 (internal)) |
| 428 | 984 { |
| 985 Lisp_Object coding_system_list = Qnil; | |
| 986 struct gcpro gcpro1; | |
| 987 struct coding_system_list_closure coding_system_list_closure; | |
| 988 | |
| 989 GCPRO1 (coding_system_list); | |
| 990 coding_system_list_closure.coding_system_list = &coding_system_list; | |
| 771 | 991 coding_system_list_closure.normal = !EQ (internal, Qt); |
| 992 coding_system_list_closure.internal = !NILP (internal); | |
| 428 | 993 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table, |
| 994 &coding_system_list_closure); | |
| 995 UNGCPRO; | |
| 996 | |
| 997 return coding_system_list; | |
| 998 } | |
| 999 | |
| 1000 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /* | |
| 1001 Return the name of the given coding system. | |
| 1002 */ | |
| 1003 (coding_system)) | |
| 1004 { | |
| 1005 coding_system = Fget_coding_system (coding_system); | |
| 1006 return XCODING_SYSTEM_NAME (coding_system); | |
| 1007 } | |
| 1008 | |
| 1009 static Lisp_Coding_System * | |
| 771 | 1010 allocate_coding_system (struct coding_system_methods *codesys_meths, |
| 1011 Bytecount data_size, | |
| 1012 Lisp_Object name) | |
| 428 | 1013 { |
| 771 | 1014 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size; |
| 428 | 1015 Lisp_Coding_System *codesys = |
| 3024 | 1016 (Lisp_Coding_System *) BASIC_ALLOC_LCRECORD (total_size, |
| 1204 | 1017 &lrecord_coding_system); |
| 1018 | |
| 771 | 1019 codesys->methods = codesys_meths; |
| 1204 | 1020 #define MARKED_SLOT(x) codesys->x = Qnil; |
| 1021 #include "coding-system-slots.h" | |
| 1022 | |
| 771 | 1023 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF; |
| 1024 CODING_SYSTEM_NAME (codesys) = name; | |
| 1025 | |
| 1026 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys))); | |
| 428 | 1027 |
| 1028 return codesys; | |
| 1029 } | |
| 1030 | |
| 771 | 1031 static enum eol_type |
| 1032 symbol_to_eol_type (Lisp_Object symbol) | |
| 1033 { | |
| 1034 CHECK_SYMBOL (symbol); | |
| 1035 if (NILP (symbol)) return EOL_AUTODETECT; | |
| 1036 if (EQ (symbol, Qlf)) return EOL_LF; | |
| 1037 if (EQ (symbol, Qcrlf)) return EOL_CRLF; | |
| 1038 if (EQ (symbol, Qcr)) return EOL_CR; | |
| 1039 | |
| 1040 invalid_constant ("Unrecognized eol type", symbol); | |
| 1204 | 1041 RETURN_NOT_REACHED (EOL_AUTODETECT); |
| 771 | 1042 } |
| 1043 | |
| 1044 static Lisp_Object | |
| 1045 eol_type_to_symbol (enum eol_type type) | |
| 1046 { | |
| 1047 switch (type) | |
| 1048 { | |
| 2500 | 1049 default: ABORT (); |
| 771 | 1050 case EOL_LF: return Qlf; |
| 1051 case EOL_CRLF: return Qcrlf; | |
| 1052 case EOL_CR: return Qcr; | |
| 1053 case EOL_AUTODETECT: return Qnil; | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 struct subsidiary_type | |
| 1058 { | |
|
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1059 const Ascbyte *extension; |
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1060 const Ascbyte *mnemonic_ext; |
| 771 | 1061 enum eol_type eol; |
| 1062 }; | |
| 1063 | |
| 1064 static struct subsidiary_type coding_subsidiary_list[] = | |
| 1065 { { "-unix", "", EOL_LF }, | |
| 1066 { "-dos", ":T", EOL_CRLF }, | |
| 1067 { "-mac", ":t", EOL_CR } }; | |
| 1068 | |
| 1069 /* kludge */ | |
| 428 | 1070 static void |
| 771 | 1071 setup_eol_coding_systems (Lisp_Object codesys) |
| 428 | 1072 { |
| 793 | 1073 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name); |
| 2367 | 1074 Ibyte *codesys_name = alloca_ibytes (len + 7); |
| 771 | 1075 int mlen = -1; |
| 867 | 1076 Ibyte *codesys_mnemonic = 0; |
| 771 | 1077 Lisp_Object codesys_name_sym, sub_codesys; |
| 1078 int i; | |
| 1079 | |
| 1080 memcpy (codesys_name, | |
| 793 | 1081 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len); |
| 771 | 1082 |
| 1083 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys))) | |
| 428 | 1084 { |
| 771 | 1085 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys)); |
| 2367 | 1086 codesys_mnemonic = alloca_ibytes (mlen + 7); |
| 771 | 1087 memcpy (codesys_mnemonic, |
| 1088 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen); | |
| 1089 } | |
| 1090 | |
| 1091 /* Create three "subsidiary" coding systems, decoding data encoded using | |
| 1092 each of the three EOL types. We do this for each subsidiary by | |
| 1093 copying the original coding system, setting the EOL type | |
| 1094 appropriately, and setting the CANONICAL member of the new coding | |
| 1095 system to be a chain consisting of the original coding system followed | |
| 1096 by a convert-eol coding system to do the EOL decoding. For EOL type | |
| 1097 LF, however, we don't need any decoding, so we skip creating a | |
| 1098 CANONICAL. | |
| 1099 | |
| 1100 If the original coding system is not a text-type coding system | |
| 1101 (decodes byte->char), we need to coerce it to one by the appropriate | |
| 1102 wrapping in CANONICAL. */ | |
| 1103 | |
| 1104 for (i = 0; i < countof (coding_subsidiary_list); i++) | |
| 1105 { | |
|
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1106 const Ascbyte *extension = coding_subsidiary_list[i].extension; |
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1107 const Ascbyte *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext; |
| 771 | 1108 enum eol_type eol = coding_subsidiary_list[i].eol; |
| 1109 | |
| 2367 | 1110 qxestrcpy_ascii (codesys_name + len, extension); |
| 771 | 1111 codesys_name_sym = intern_int (codesys_name); |
| 1112 if (mlen != -1) | |
| 2367 | 1113 qxestrcpy_ascii (codesys_mnemonic + mlen, mnemonic_ext); |
| 771 | 1114 |
| 1115 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym); | |
| 1116 if (mlen != -1) | |
| 1117 XCODING_SYSTEM_MNEMONIC (sub_codesys) = | |
| 1118 build_intstring (codesys_mnemonic); | |
| 1119 | |
| 1120 if (eol != EOL_LF) | |
| 1121 { | |
| 1122 Lisp_Object chain = list2 (get_coding_system_for_text_file | |
| 1123 (codesys, 0), | |
| 1124 eol == EOL_CR ? Qconvert_eol_cr : | |
| 1125 Qconvert_eol_crlf); | |
| 1126 Lisp_Object canon = | |
| 1127 make_internal_coding_system | |
| 1128 (sub_codesys, "internal-subsidiary-eol-wrapper", | |
| 1129 Qchain, Qunbound, | |
| 1130 mlen != -1 ? | |
| 1131 list6 (Qmnemonic, build_intstring (codesys_mnemonic), | |
| 1132 Qchain, chain, | |
| 1133 Qcanonicalize_after_coding, sub_codesys) : | |
| 1134 list4 (Qchain, chain, | |
| 1135 Qcanonicalize_after_coding, sub_codesys)); | |
| 1136 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon; | |
| 1137 } | |
| 1138 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol; | |
| 1139 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys; | |
| 1140 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys; | |
| 428 | 1141 } |
| 1142 } | |
| 1143 | |
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1144 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, |
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1145 1, 1, 0, /* |
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1146 Return t if OBJECT names a coding system, and is not a coding system alias. |
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1147 */ |
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1148 (object)) |
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1149 { |
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1150 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil)) |
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1151 ? Qt : Qnil; |
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1152 } |
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1153 |
| 771 | 1154 /* Basic function to create new coding systems. For `make-coding-system', |
| 1155 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE, | |
| 1156 DESCRIPTION, and PROPS are the same. All created coding systems are put | |
| 1157 in a hash table indexed by NAME. | |
| 1158 | |
| 1159 If PREFIX is a string, NAME-OR-EXISTING should specify an existing | |
| 1160 coding system (or nil), and an internal coding system will be created. | |
| 1161 The name of the coding system will be constructed by combining PREFIX | |
| 1162 with the name of the existing coding system (if given), and a number | |
| 1163 will be appended to insure uniqueness. In such a case, if Qunbound is | |
| 1164 given for DESCRIPTION, the description gets created based on the | |
| 1165 generated name. Also, if no mnemonic is given in the properties list, a | |
| 1166 mnemonic is created based on the generated name. | |
| 1167 | |
| 1168 For internal coding systems, the coding system is marked as internal | |
| 1169 (see `coding-system-list'), and no subsidiaries will be created or | |
| 1170 eol-wrapping will happen. Otherwise: | |
| 1171 | |
| 1172 -- if the eol-type property is `lf' or t, the coding system is merely | |
| 1173 created and returned. (For t, the coding system will be wrapped with | |
| 1174 an EOL autodetector when it's used to read a file.) | |
| 1175 | |
| 1176 -- if eol-type is `crlf' or `cr', after the coding system object is | |
| 1177 created, it will be wrapped in a chain with the appropriate | |
| 1178 convert-eol coding system (either `convert-eol-crlf' or | |
| 1179 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at | |
| 1180 decoding time, and the opposite at encoding time. The resulting | |
| 1181 chain becomes the CANONICAL field of the coding system object. | |
| 1182 | |
| 1183 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three | |
| 1184 coding systems where the original coding system (before wrapping with | |
| 1185 convert-eol-autodetect) is either unwrapped or wrapped with | |
| 1186 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems | |
| 1187 to handle LF, CRLF, and CR end-of-line indicators are created. (This | |
| 1188 crazy crap is based on existing behavior in other Mule versions, | |
| 1189 including FSF Emacs.) | |
| 1190 */ | |
| 428 | 1191 |
| 1192 static Lisp_Object | |
|
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1193 make_coding_system_1 (Lisp_Object name_or_existing, const Ascbyte *prefix, |
| 771 | 1194 Lisp_Object type, Lisp_Object description, |
| 1195 Lisp_Object props) | |
| 428 | 1196 { |
| 771 | 1197 Lisp_Coding_System *cs; |
| 1198 int need_to_setup_eol_systems = 1; | |
| 1199 enum eol_type eol_wrapper = EOL_AUTODETECT; | |
| 1200 struct coding_system_methods *meths; | |
| 1201 Lisp_Object csobj; | |
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1202 Lisp_Object defmnem = Qnil, aliases = Qnil; |
| 771 | 1203 |
| 1204 if (NILP (type)) | |
| 1205 type = Qundecided; | |
| 1206 meths = decode_coding_system_type (type, ERROR_ME); | |
| 1207 | |
| 1208 if (prefix) | |
| 428 | 1209 { |
| 867 | 1210 Ibyte *newname = |
| 771 | 1211 emacs_sprintf_malloc (NULL, "%s-%s-%d", |
| 1212 prefix, | |
| 867 | 1213 NILP (name_or_existing) ? (Ibyte *) "nil" : |
| 771 | 1214 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME |
| 1215 (name_or_existing))), | |
| 1216 ++coding_system_tick); | |
| 1217 name_or_existing = intern_int (newname); | |
| 1726 | 1218 xfree (newname, Ibyte *); |
| 771 | 1219 |
| 1220 if (UNBOUNDP (description)) | |
| 1221 { | |
| 1222 newname = | |
| 1223 emacs_sprintf_malloc | |
| 1224 (NULL, "For Internal Use (%s)", | |
| 1225 XSTRING_DATA (Fsymbol_name (name_or_existing))); | |
| 1226 description = build_intstring (newname); | |
| 1726 | 1227 xfree (newname, Ibyte *); |
| 771 | 1228 } |
| 1229 | |
| 1230 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick); | |
| 1231 defmnem = build_intstring (newname); | |
| 1726 | 1232 xfree (newname, Ibyte *); |
| 428 | 1233 } |
| 771 | 1234 else |
| 1235 CHECK_SYMBOL (name_or_existing); | |
| 1236 | |
| 4303 | 1237 /* See is there an entry for name_or_existing in the defined coding system |
| 1238 hash table. */ | |
| 1239 csobj = find_coding_system (name_or_existing, 0); | |
| 1240 /* Error if it's there and not an autoload form. */ | |
| 1241 if (!NILP (csobj) && !CONSP (csobj)) | |
| 771 | 1242 invalid_operation ("Cannot redefine existing coding system", |
| 4303 | 1243 name_or_existing); |
| 771 | 1244 |
| 1245 cs = allocate_coding_system (meths, meths->extra_data_size, | |
| 1246 name_or_existing); | |
| 793 | 1247 csobj = wrap_coding_system (cs); |
| 771 | 1248 |
| 1249 cs->internal_p = !!prefix; | |
| 1250 | |
| 1251 if (NILP (description)) | |
| 1252 description = build_string (""); | |
| 1253 else | |
| 1254 CHECK_STRING (description); | |
| 1255 CODING_SYSTEM_DESCRIPTION (cs) = description; | |
| 1256 | |
| 1257 if (!NILP (defmnem)) | |
| 1258 CODING_SYSTEM_MNEMONIC (cs) = defmnem; | |
| 1259 | |
| 1260 { | |
| 1261 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props) | |
| 1262 { | |
| 1263 int recognized = 1; | |
| 1264 | |
| 1265 if (EQ (key, Qmnemonic)) | |
| 1266 { | |
| 1267 if (!NILP (value)) | |
| 1268 CHECK_STRING (value); | |
| 1269 CODING_SYSTEM_MNEMONIC (cs) = value; | |
| 1270 } | |
| 1271 | |
| 1272 else if (EQ (key, Qdocumentation)) | |
| 1273 { | |
| 1274 if (!NILP (value)) | |
| 1275 CHECK_STRING (value); | |
| 1276 CODING_SYSTEM_DOCUMENTATION (cs) = value; | |
| 1277 } | |
| 1278 | |
| 1279 else if (EQ (key, Qeol_type)) | |
| 1280 { | |
| 1281 need_to_setup_eol_systems = NILP (value); | |
| 1282 if (EQ (value, Qt)) | |
| 1283 value = Qnil; | |
| 1284 eol_wrapper = symbol_to_eol_type (value); | |
| 1285 } | |
| 1286 | |
| 1287 else if (EQ (key, Qpost_read_conversion)) | |
| 1288 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value; | |
| 1289 else if (EQ (key, Qpre_write_conversion)) | |
| 1290 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value; | |
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1291 else if (EQ (key, Qaliases)) |
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1292 { |
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1293 EXTERNAL_LIST_LOOP_2 (alias, value) |
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1294 { |
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1295 CHECK_SYMBOL (alias); |
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1296 |
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1297 if (!NILP (Fcoding_system_canonical_name_p (alias))) |
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1298 { |
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1299 invalid_change ("Symbol is the canonical name of a " |
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1300 "coding system and cannot be redefined", |
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1301 alias); |
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1302 } |
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1303 } |
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1304 aliases = value; |
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1305 } |
| 771 | 1306 /* FSF compatibility */ |
| 1307 else if (EQ (key, Qtranslation_table_for_decode)) | |
| 1308 ; | |
| 1309 else if (EQ (key, Qtranslation_table_for_encode)) | |
| 1310 ; | |
| 1311 else if (EQ (key, Qsafe_chars)) | |
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1312 { |
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1313 CHECK_CHAR_TABLE (value); |
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1314 CODING_SYSTEM_SAFE_CHARS (cs) = value; |
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1315 } |
| 771 | 1316 else if (EQ (key, Qsafe_charsets)) |
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1317 { |
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1318 if (!EQ (Qt, value) |
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1319 /* Would be nice to actually do this check, but there are |
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1320 some order conflicts with japanese.el and |
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1321 mule-coding.el */ |
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1322 && 0) |
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1323 { |
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1324 #ifdef MULE |
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1325 EXTERNAL_LIST_LOOP_2 (safe_charset, value) |
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1326 CHECK_CHARSET (Ffind_charset (safe_charset)); |
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1327 #endif |
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1328 } |
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1329 |
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1330 CODING_SYSTEM_SAFE_CHARSETS (cs) = value; |
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1331 } |
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1332 else if (EQ (key, Qcategory)) |
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1333 { |
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1334 Fput (name_or_existing, intern ("coding-system-property"), |
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1335 Fplist_put (Fget (name_or_existing, |
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1336 intern ("coding-system-property"), |
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1337 Qnil), |
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1338 Qcategory, value)); |
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1339 } |
| 771 | 1340 else if (EQ (key, Qmime_charset)) |
| 1341 ; | |
| 1342 else if (EQ (key, Qvalid_codes)) | |
| 1343 ; | |
| 1344 else | |
| 1345 recognized = CODESYSMETH_OR_GIVEN (cs, putprop, | |
| 1346 (csobj, key, value), 0); | |
| 1347 | |
| 1348 if (!recognized) | |
| 1349 invalid_constant ("Unrecognized property", key); | |
| 1350 } | |
| 1351 } | |
| 1352 | |
| 1353 { | |
| 1354 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 1355 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil); | |
| 1356 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system | |
| 1357 below */ | |
| 1358 | |
| 4303 | 1359 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table); |
| 1360 | |
| 771 | 1361 if (need_to_setup_eol_systems && !cs->internal_p) |
| 1362 setup_eol_coding_systems (csobj); | |
| 1363 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF) | |
| 1364 { | |
| 1365 /* If a specific eol-type (other than LF) was specified, we handle | |
| 1366 this by converting the coding system into a chain that wraps the | |
| 1367 coding system along with a convert-eol system after it, in | |
| 1368 exactly that same switcheroo fashion that the normal | |
| 1369 canonicalize method works -- BUT we will run into a problem if | |
| 1370 we do it the obvious way, because when `chain' creates its | |
| 1371 substreams, the substream containing the coding system we're | |
| 1372 creating will have canonicalization expansion done on it, | |
| 1373 leading to infinite recursion. So we have to generate a new, | |
| 1374 internal coding system with the previous value of CANONICAL. */ | |
| 867 | 1375 Ibyte *newname = |
| 771 | 1376 emacs_sprintf_malloc |
| 1377 (NULL, "internal-eol-copy-%s-%d", | |
| 1378 XSTRING_DATA (Fsymbol_name (name_or_existing)), | |
| 1379 ++coding_system_tick); | |
| 1380 Lisp_Object newnamesym = intern_int (newname); | |
| 1381 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym); | |
| 1726 | 1382 xfree (newname, Ibyte *); |
| 771 | 1383 |
| 1384 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 1385 make_internal_coding_system | |
| 1386 (csobj, | |
| 1387 "internal-eol-wrapper", | |
| 1388 Qchain, Qunbound, | |
| 1389 list4 (Qchain, | |
| 1390 list2 (copied, | |
| 1391 eol_wrapper == EOL_CR ? | |
| 1392 Qconvert_eol_cr : | |
| 1393 Qconvert_eol_crlf), | |
| 1394 Qcanonicalize_after_coding, | |
| 1395 csobj)); | |
| 1396 } | |
| 1397 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper; | |
|
4690
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1398 |
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1399 { |
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1400 EXTERNAL_LIST_LOOP_2 (alias, aliases) |
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1401 Fdefine_coding_system_alias (alias, csobj); |
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1402 } |
| 771 | 1403 } |
| 1404 | |
| 1405 return csobj; | |
| 428 | 1406 } |
| 1407 | |
| 771 | 1408 Lisp_Object |
|
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1409 make_internal_coding_system (Lisp_Object existing, const Ascbyte *prefix, |
| 771 | 1410 Lisp_Object type, Lisp_Object description, |
| 1411 Lisp_Object props) | |
| 1412 { | |
| 1413 return make_coding_system_1 (existing, prefix, type, description, props); | |
| 1414 } | |
| 428 | 1415 |
|
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1416 DEFUN ("make-coding-system-internal", Fmake_coding_system_internal, 2, 4, 0, /* |
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1417 See `make-coding-system'. This does much of the work of that function. |
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1418 |
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1419 Without Mule support, it does all the work of that function, and an alias |
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1420 exists, mapping `make-coding-system' to |
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1421 `make-coding-system-internal'. You'll need a non-Mule XEmacs to read the |
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1422 complete docstring. Or you can just read it in make-coding-system.el; |
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1423 something like the following should work: |
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1424 |
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1425 \\[find-function-other-window] find-file RET \\[find-file] mule/make-coding-system.el RET |
| 771 | 1426 |
| 428 | 1427 */ |
| 771 | 1428 (name, type, description, props)) |
| 428 | 1429 { |
| 771 | 1430 return make_coding_system_1 (name, 0, type, description, props); |
| 428 | 1431 } |
| 1432 | |
| 1433 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /* | |
| 1434 Copy OLD-CODING-SYSTEM to NEW-NAME. | |
| 1435 If NEW-NAME does not name an existing coding system, a new one will | |
| 1436 be created. | |
| 771 | 1437 If you are using this function to create an alias, think again: |
| 1438 Use `define-coding-system-alias' instead. | |
| 428 | 1439 */ |
| 1440 (old_coding_system, new_name)) | |
| 1441 { | |
| 1442 Lisp_Object new_coding_system; | |
| 1443 old_coding_system = Fget_coding_system (old_coding_system); | |
| 771 | 1444 new_coding_system = |
| 4303 | 1445 UNBOUNDP (new_name) ? Qnil : find_coding_system (new_name, 0); |
| 428 | 1446 if (NILP (new_coding_system)) |
| 1447 { | |
| 793 | 1448 new_coding_system = |
| 1449 wrap_coding_system | |
| 1450 (allocate_coding_system | |
| 1451 (XCODING_SYSTEM (old_coding_system)->methods, | |
| 1452 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size, | |
| 1453 new_name)); | |
| 771 | 1454 if (!UNBOUNDP (new_name)) |
| 1455 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table); | |
| 428 | 1456 } |
| 771 | 1457 else if (XCODING_SYSTEM (old_coding_system)->methods != |
| 1458 XCODING_SYSTEM (new_coding_system)->methods) | |
| 1459 invalid_operation_2 ("Coding systems not same type", | |
| 1460 old_coding_system, new_coding_system); | |
| 428 | 1461 |
| 1462 { | |
| 1463 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system); | |
| 1464 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system); | |
| 3017 | 1465 COPY_SIZED_LCRECORD (to, from, sizeof_coding_system (from)); |
| 428 | 1466 to->name = new_name; |
| 1467 } | |
| 1468 return new_coding_system; | |
| 1469 } | |
| 1470 | |
| 2297 | 1471 /* #### Shouldn't this really be a find/get pair? */ |
| 1472 | |
| 440 | 1473 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /* |
| 1474 Return t if OBJECT is a coding system alias. | |
| 1475 All coding system aliases are created by `define-coding-system-alias'. | |
| 1476 */ | |
| 1477 (object)) | |
| 428 | 1478 { |
| 440 | 1479 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero)) |
| 1480 ? Qt : Qnil; | |
| 1481 } | |
| 1482 | |
| 1483 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /* | |
| 1484 Return the coding-system symbol for which symbol ALIAS is an alias. | |
| 1485 */ | |
| 1486 (alias)) | |
| 1487 { | |
| 1488 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil); | |
| 1489 if (SYMBOLP (aliasee)) | |
| 1490 return aliasee; | |
| 1491 else | |
| 563 | 1492 invalid_argument ("Symbol is not a coding system alias", alias); |
| 1204 | 1493 RETURN_NOT_REACHED (Qnil); |
| 440 | 1494 } |
| 1495 | |
| 1496 /* A maphash function, for removing dangling coding system aliases. */ | |
| 1497 static int | |
| 2286 | 1498 dangling_coding_system_alias_p (Lisp_Object UNUSED (alias), |
| 440 | 1499 Lisp_Object aliasee, |
| 1500 void *dangling_aliases) | |
| 1501 { | |
| 1502 if (SYMBOLP (aliasee) | |
| 1503 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil))) | |
| 428 | 1504 { |
| 440 | 1505 (*(int *) dangling_aliases)++; |
| 1506 return 1; | |
| 428 | 1507 } |
| 440 | 1508 else |
| 1509 return 0; | |
| 1510 } | |
| 1511 | |
| 1512 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /* | |
| 1513 Define symbol ALIAS as an alias for coding system ALIASEE. | |
| 1514 | |
| 1515 You can use this function to redefine an alias that has already been defined, | |
| 1516 but you cannot redefine a name which is the canonical name for a coding system. | |
| 1517 \(a canonical name of a coding system is what is returned when you call | |
| 1518 `coding-system-name' on a coding system). | |
| 1519 | |
| 1520 ALIASEE itself can be an alias, which allows you to define nested aliases. | |
| 1521 | |
| 1522 You are forbidden, however, from creating alias loops or `dangling' aliases. | |
| 1523 These will be detected, and an error will be signaled if you attempt to do so. | |
| 1524 | |
| 1525 If ALIASEE is nil, then ALIAS will simply be undefined. | |
| 1526 | |
| 1527 See also `coding-system-alias-p', `coding-system-aliasee', | |
| 1528 and `coding-system-canonical-name-p'. | |
| 1529 */ | |
| 1530 (alias, aliasee)) | |
| 1531 { | |
| 2286 | 1532 Lisp_Object probe; |
| 440 | 1533 |
| 1534 CHECK_SYMBOL (alias); | |
| 1535 | |
| 1536 if (!NILP (Fcoding_system_canonical_name_p (alias))) | |
| 563 | 1537 invalid_change |
| 440 | 1538 ("Symbol is the canonical name of a coding system and cannot be redefined", |
| 1539 alias); | |
| 1540 | |
| 1541 if (NILP (aliasee)) | |
| 1542 { | |
| 771 | 1543 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix"); |
| 1544 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos"); | |
| 1545 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac"); | |
| 440 | 1546 |
| 1547 Fremhash (alias, Vcoding_system_hash_table); | |
| 1548 | |
| 1549 /* Undefine subsidiary aliases, | |
| 1550 presumably created by a previous call to this function */ | |
| 1551 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) && | |
| 1552 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) && | |
| 1553 ! NILP (Fcoding_system_alias_p (subsidiary_mac))) | |
| 1554 { | |
| 1555 Fdefine_coding_system_alias (subsidiary_unix, Qnil); | |
| 1556 Fdefine_coding_system_alias (subsidiary_dos, Qnil); | |
| 1557 Fdefine_coding_system_alias (subsidiary_mac, Qnil); | |
| 1558 } | |
| 1559 | |
| 1560 /* Undefine dangling coding system aliases. */ | |
| 1561 { | |
| 1562 int dangling_aliases; | |
| 1563 | |
| 1564 do { | |
| 1565 dangling_aliases = 0; | |
| 1566 elisp_map_remhash (dangling_coding_system_alias_p, | |
| 1567 Vcoding_system_hash_table, | |
| 1568 &dangling_aliases); | |
| 1569 } while (dangling_aliases > 0); | |
| 1570 } | |
| 1571 | |
| 1572 return Qnil; | |
| 1573 } | |
| 1574 | |
| 1575 if (CODING_SYSTEMP (aliasee)) | |
| 1576 aliasee = XCODING_SYSTEM_NAME (aliasee); | |
| 1577 | |
| 1578 /* Checks that aliasee names a coding-system */ | |
| 2286 | 1579 (void) Fget_coding_system (aliasee); |
| 440 | 1580 |
| 1581 /* Check for coding system alias loops */ | |
| 1582 if (EQ (alias, aliasee)) | |
| 563 | 1583 alias_loop: invalid_operation_2 |
| 440 | 1584 ("Attempt to create a coding system alias loop", alias, aliasee); |
| 1585 | |
| 1586 for (probe = aliasee; | |
| 1587 SYMBOLP (probe); | |
| 1588 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero)) | |
| 1589 { | |
| 1590 if (EQ (probe, alias)) | |
| 1591 goto alias_loop; | |
| 1592 } | |
| 1593 | |
| 1594 Fputhash (alias, aliasee, Vcoding_system_hash_table); | |
| 1595 | |
| 1596 /* Set up aliases for subsidiaries. | |
| 2297 | 1597 #### There must be a better way to handle subsidiary coding systems. |
| 1598 Inquiring Minds Want To Know: shouldn't they always be chains? */ | |
| 440 | 1599 { |
| 1600 static const char *suffixes[] = { "-unix", "-dos", "-mac" }; | |
| 1601 int i; | |
| 1602 for (i = 0; i < countof (suffixes); i++) | |
| 1603 { | |
| 1604 Lisp_Object alias_subsidiary = | |
| 771 | 1605 add_suffix_to_symbol (alias, suffixes[i]); |
| 440 | 1606 Lisp_Object aliasee_subsidiary = |
| 771 | 1607 add_suffix_to_symbol (aliasee, suffixes[i]); |
| 440 | 1608 |
| 1609 if (! NILP (Ffind_coding_system (aliasee_subsidiary))) | |
| 1610 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary); | |
| 1611 } | |
| 1612 } | |
| 428 | 1613 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac], |
| 1614 but it doesn't look intentional, so I'd rather return something | |
| 1615 meaningful or nothing at all. */ | |
| 1616 return Qnil; | |
| 1617 } | |
| 1618 | |
| 1619 static Lisp_Object | |
| 771 | 1620 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type) |
| 428 | 1621 { |
| 1622 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 1623 Lisp_Object new_coding_system; | |
| 1624 | |
| 1625 switch (type) | |
| 1626 { | |
| 1627 case EOL_AUTODETECT: return coding_system; | |
| 1628 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break; | |
| 1629 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break; | |
| 1630 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break; | |
| 2500 | 1631 default: ABORT (); return Qnil; |
| 428 | 1632 } |
| 1633 | |
| 1634 return NILP (new_coding_system) ? coding_system : new_coding_system; | |
| 1635 } | |
| 1636 | |
| 1637 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /* | |
| 1638 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE. | |
| 771 | 1639 The logically opposite operation is `coding-system-base'. |
| 428 | 1640 */ |
| 1641 (coding_system, eol_type)) | |
| 1642 { | |
| 771 | 1643 coding_system = get_coding_system_for_text_file (coding_system, 0); |
| 428 | 1644 |
| 1645 return subsidiary_coding_system (coding_system, | |
| 1646 symbol_to_eol_type (eol_type)); | |
| 1647 } | |
| 1648 | |
| 771 | 1649 DEFUN ("coding-system-base", Fcoding_system_base, |
| 1650 1, 1, 0, /* | |
| 1651 Return the base coding system of CODING-SYSTEM. | |
| 1652 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it | |
| 1653 returns CODING-SYSTEM. | |
| 1654 The logically opposite operation is `subsidiary-coding-system'. | |
| 1655 */ | |
| 1656 (coding_system)) | |
| 1657 { | |
| 1658 Lisp_Object base; | |
| 1659 | |
| 1660 coding_system = Fget_coding_system (coding_system); | |
| 1661 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary)) | |
| 1662 return Fget_coding_system (Qraw_text); /* hack! */ | |
| 1663 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system); | |
| 1664 if (!NILP (base)) | |
| 1665 return base; | |
| 1666 return coding_system; | |
| 1667 } | |
| 1668 | |
| 1669 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io, | |
| 1670 1, 1, 0, /* | |
| 1671 Return the coding system actually used for I/O. | |
| 1672 In some cases (e.g. when a particular EOL type is specified) this won't be | |
| 2297 | 1673 the coding system itself. This can be useful when trying to determine |
| 1674 precisely how data was decoded. | |
| 771 | 1675 */ |
| 1676 (coding_system)) | |
| 1677 { | |
| 1678 Lisp_Object canon; | |
| 1679 | |
| 1680 coding_system = Fget_coding_system (coding_system); | |
| 1681 canon = XCODING_SYSTEM_CANONICAL (coding_system); | |
| 1682 if (!NILP (canon)) | |
| 1683 return canon; | |
| 1684 return coding_system; | |
| 1685 } | |
| 1686 | |
| 428 | 1687 |
| 1688 /************************************************************************/ | |
| 1689 /* Coding system accessors */ | |
| 1690 /************************************************************************/ | |
| 1691 | |
| 771 | 1692 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /* |
| 1693 Return the description for CODING-SYSTEM. | |
| 1694 The `description' of a coding system is a short English phrase giving the | |
| 1695 name rendered according to English punctuation rules, plus possibly some | |
| 1696 explanatory text (typically in the form of a parenthetical phrase). The | |
| 1697 description is intended to be short enough that it can appear as a menu item, | |
| 1698 and clear enough to be recognizable even to someone who is assumed to have | |
| 1699 some basic familiarity with different encodings but may not know all the | |
| 1700 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and | |
| 1701 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of | |
| 1702 the encoding is given, followed by a note that this is a Chinese encoding, | |
| 1703 because the great majority of people encountering this would have no idea | |
| 1704 what it is, and giving the language indicates whether the encoding should | |
| 1705 just be ignored or (conceivably) investigated more thoroughly. | |
| 428 | 1706 */ |
| 1707 (coding_system)) | |
| 1708 { | |
| 1709 coding_system = Fget_coding_system (coding_system); | |
| 771 | 1710 return XCODING_SYSTEM_DESCRIPTION (coding_system); |
| 428 | 1711 } |
| 1712 | |
| 1713 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /* | |
| 1714 Return the type of CODING-SYSTEM. | |
| 1715 */ | |
| 1716 (coding_system)) | |
| 1717 { | |
| 771 | 1718 coding_system = Fget_coding_system (coding_system); |
| 1719 return XCODING_SYSTEM_TYPE (coding_system); | |
| 428 | 1720 } |
| 1721 | |
| 1722 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /* | |
| 1723 Return the PROP property of CODING-SYSTEM. | |
| 1724 */ | |
| 1725 (coding_system, prop)) | |
| 1726 { | |
| 1727 coding_system = Fget_coding_system (coding_system); | |
| 1728 CHECK_SYMBOL (prop); | |
| 1729 | |
| 1730 if (EQ (prop, Qname)) | |
| 1731 return XCODING_SYSTEM_NAME (coding_system); | |
| 1732 else if (EQ (prop, Qtype)) | |
| 1733 return Fcoding_system_type (coding_system); | |
| 771 | 1734 else if (EQ (prop, Qdescription)) |
| 1735 return XCODING_SYSTEM_DESCRIPTION (coding_system); | |
| 428 | 1736 else if (EQ (prop, Qmnemonic)) |
| 1737 return XCODING_SYSTEM_MNEMONIC (coding_system); | |
| 771 | 1738 else if (EQ (prop, Qdocumentation)) |
| 1739 return XCODING_SYSTEM_DOCUMENTATION (coding_system); | |
| 428 | 1740 else if (EQ (prop, Qeol_type)) |
| 771 | 1741 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE |
| 1742 (coding_system)); | |
| 428 | 1743 else if (EQ (prop, Qeol_lf)) |
| 1744 return XCODING_SYSTEM_EOL_LF (coding_system); | |
| 1745 else if (EQ (prop, Qeol_crlf)) | |
| 1746 return XCODING_SYSTEM_EOL_CRLF (coding_system); | |
| 1747 else if (EQ (prop, Qeol_cr)) | |
| 1748 return XCODING_SYSTEM_EOL_CR (coding_system); | |
| 1749 else if (EQ (prop, Qpost_read_conversion)) | |
| 1750 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system); | |
| 1751 else if (EQ (prop, Qpre_write_conversion)) | |
| 1752 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system); | |
|
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1753 else if (EQ (prop, Qsafe_charsets)) |
|
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1754 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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|
1755 else if (EQ (prop, Qsafe_chars)) |
|
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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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|
1756 return XCODING_SYSTEM_SAFE_CHARS (coding_system); |
| 771 | 1757 else |
| 1758 { | |
| 1759 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system), | |
| 1760 getprop, | |
| 1761 (coding_system, prop), | |
| 1762 Qunbound); | |
| 1763 if (UNBOUNDP (value)) | |
| 1764 invalid_constant ("Unrecognized property", prop); | |
| 1765 return value; | |
| 1766 } | |
| 1767 } | |
| 1768 | |
| 1769 | |
| 1770 /************************************************************************/ | |
| 1771 /* Coding stream functions */ | |
| 1772 /************************************************************************/ | |
| 1773 | |
| 1774 /* A coding stream is a stream used for encoding or decoding text. The | |
| 1775 coding-stream object keeps track of the actual coding system, the stream | |
| 1776 that is at the other end, and data that needs to be persistent across | |
| 1777 the lifetime of the stream. */ | |
| 1778 | |
| 1204 | 1779 extern const struct sized_memory_description chain_coding_stream_description; |
| 1780 extern const struct sized_memory_description undecided_coding_stream_description; | |
| 1781 | |
| 1782 static const struct memory_description coding_stream_data_description_1 []= { | |
| 2551 | 1783 { XD_BLOCK_PTR, chain_coding_system, 1, |
| 1784 { &chain_coding_stream_description } }, | |
| 1785 { XD_BLOCK_PTR, undecided_coding_system, 1, | |
| 1786 { &undecided_coding_stream_description } }, | |
| 1204 | 1787 { XD_END } |
| 1788 }; | |
| 1789 | |
| 1790 static const struct sized_memory_description coding_stream_data_description = { | |
| 1791 sizeof (void *), coding_stream_data_description_1 | |
| 1792 }; | |
| 1793 | |
| 1794 static const struct memory_description coding_lstream_description[] = { | |
| 1795 { XD_INT, offsetof (struct coding_stream, type) }, | |
| 1796 { XD_LISP_OBJECT, offsetof (struct coding_stream, orig_codesys) }, | |
| 1797 { XD_LISP_OBJECT, offsetof (struct coding_stream, codesys) }, | |
| 1798 { XD_LISP_OBJECT, offsetof (struct coding_stream, other_end) }, | |
| 1799 { XD_UNION, offsetof (struct coding_stream, data), | |
| 2551 | 1800 XD_INDIRECT (0, 0), { &coding_stream_data_description } }, |
| 1204 | 1801 { XD_END } |
| 1802 }; | |
| 1803 | |
| 1804 DEFINE_LSTREAM_IMPLEMENTATION_WITH_DATA ("coding", coding); | |
| 771 | 1805 |
| 1806 /* Encoding and decoding are parallel operations, so we create just one | |
| 1807 stream for both. "Decoding" may involve the extra step of autodetection | |
| 1808 of the data format, but that's only because of the conventional | |
| 1809 definition of decoding as converting from external- to | |
| 1810 internal-formatted data. | |
| 1811 | |
| 2297 | 1812 [[ REWRITE ME! ]] |
| 1813 | |
| 771 | 1814 #### We really need to abstract out the concept of "data formats" and |
| 1815 define "converters" that convert from and to specified formats, | |
| 1816 eliminating the idea of decoding and encoding. When specifying a | |
| 1817 conversion process, we need to give the data formats themselves, not the | |
| 1818 conversion processes -- e.g. a coding system called "Unicode->multibyte" | |
| 1819 converts in both directions, and we could auto-detect the format of data | |
| 1820 at either end. */ | |
| 1821 | |
| 1822 static Bytecount | |
| 1823 coding_reader (Lstream *stream, unsigned char *data, Bytecount size) | |
| 1824 { | |
| 1825 unsigned char *orig_data = data; | |
| 1826 Bytecount read_size; | |
| 1827 int error_occurred = 0; | |
| 1828 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1829 | |
| 1830 /* We need to interface to coding_{de,en}code_1(), which expects to take | |
| 1831 some amount of data and store the result into a Dynarr. We have | |
| 1832 coding_{de,en}code_1() store into c->runoff, and take data from there | |
| 1833 as necessary. */ | |
| 1834 | |
| 1835 /* We loop until we have enough data, reading chunks from the other | |
| 1836 end and converting it. */ | |
| 1837 while (1) | |
| 1838 { | |
| 1839 /* Take data from convert_to if we can. Make sure to take at | |
| 1840 most SIZE bytes, and delete the data from convert_to. */ | |
| 1841 if (Dynarr_length (str->convert_to) > 0) | |
| 1842 { | |
| 1843 Bytecount chunk = | |
| 1844 min (size, (Bytecount) Dynarr_length (str->convert_to)); | |
| 1845 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk); | |
| 1846 Dynarr_delete_many (str->convert_to, 0, chunk); | |
| 1847 data += chunk; | |
| 1848 size -= chunk; | |
| 1849 } | |
| 1850 | |
| 1851 if (size == 0) | |
| 1852 break; /* No more room for data */ | |
| 1853 | |
| 1854 if (str->eof) | |
| 1855 break; | |
| 1856 | |
| 1857 { | |
| 1858 /* Exhausted convert_to, so get some more. Read into convert_from, | |
| 1859 after existing "rejected" data from the last conversion. */ | |
| 1860 Bytecount rejected = Dynarr_length (str->convert_from); | |
| 1861 /* #### 1024 is arbitrary; we really need to separate 0 from EOF, | |
| 1862 and when we get 0, keep taking more data until we don't get 0 -- | |
| 1863 we don't know how much data the conversion routine might need | |
| 2297 | 1864 before it can generate any data of its own (eg, bzip2). */ |
| 814 | 1865 Bytecount readmore = |
| 1866 str->one_byte_at_a_time ? (Bytecount) 1 : | |
| 1867 max (size, (Bytecount) 1024); | |
| 771 | 1868 |
| 1869 Dynarr_add_many (str->convert_from, 0, readmore); | |
| 1870 read_size = Lstream_read (str->other_end, | |
| 1871 Dynarr_atp (str->convert_from, rejected), | |
| 1872 readmore); | |
| 1873 /* Trim size down to how much we actually got */ | |
| 1874 Dynarr_set_size (str->convert_from, rejected + max (0, read_size)); | |
| 1875 } | |
| 1876 | |
| 1877 if (read_size < 0) /* LSTREAM_ERROR */ | |
| 1878 { | |
| 1879 error_occurred = 1; | |
| 1880 break; | |
| 1881 } | |
| 1882 if (read_size == 0) /* LSTREAM_EOF */ | |
| 1883 /* There might be some more end data produced in the translation, | |
| 1884 so we set a flag and call the conversion method once more to | |
| 1885 output any final stuff it may be holding, any "go back to a sane | |
| 1886 state" escape sequences, etc. The conversion method is free to | |
| 1887 look at this flag, and we use it above to stop looping. */ | |
| 1888 str->eof = 1; | |
| 1889 { | |
| 1890 Bytecount processed; | |
| 1891 Bytecount to_process = Dynarr_length (str->convert_from); | |
| 1892 | |
| 1893 /* Convert the data, and save any rejected data in convert_from */ | |
| 1894 processed = | |
| 1895 XCODESYSMETH (str->codesys, convert, | |
| 1896 (str, Dynarr_atp (str->convert_from, 0), | |
| 1897 str->convert_to, to_process)); | |
| 1898 if (processed < 0) | |
| 1899 { | |
| 1900 error_occurred = 1; | |
| 1901 break; | |
| 1902 } | |
| 1903 assert (processed <= to_process); | |
| 1904 if (processed < to_process) | |
| 1905 memmove (Dynarr_atp (str->convert_from, 0), | |
| 1906 Dynarr_atp (str->convert_from, processed), | |
| 1907 to_process - processed); | |
| 1908 Dynarr_set_size (str->convert_from, to_process - processed); | |
| 1909 } | |
| 1910 } | |
| 1911 | |
| 1912 if (data - orig_data == 0) | |
| 1913 return error_occurred ? -1 : 0; | |
| 1914 else | |
| 1915 return data - orig_data; | |
| 1916 } | |
| 1917 | |
| 1918 static Bytecount | |
| 1919 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size) | |
| 1920 { | |
| 1921 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1922 | |
| 1923 /* Convert all our data into convert_to, and then attempt to write | |
| 1924 it all out to the other end. */ | |
| 1925 Dynarr_reset (str->convert_to); | |
| 1926 size = XCODESYSMETH (str->codesys, convert, | |
| 1927 (str, data, str->convert_to, size)); | |
| 1928 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0), | |
| 1929 Dynarr_length (str->convert_to)) < 0) | |
| 1930 return -1; | |
| 1931 else | |
| 1932 /* The return value indicates how much of the incoming data was | |
| 1933 processed, not how many bytes were written. */ | |
| 1934 return size; | |
| 1935 } | |
| 1936 | |
| 1937 static int | |
| 1938 encode_decode_source_sink_type_is_char (Lisp_Object cs, | |
| 1939 enum source_or_sink sex, | |
| 1940 enum encode_decode direction) | |
| 1941 { | |
| 1942 return (direction == CODING_DECODE ? | |
| 1943 decoding_source_sink_type_is_char (cs, sex) : | |
| 1944 encoding_source_sink_type_is_char (cs, sex)); | |
| 1945 } | |
| 1946 | |
| 1947 /* Ensure that the convert methods only get full characters sent to them to | |
| 1948 convert if the source of that conversion is characters; and that no such | |
| 1949 full-character checking happens when the source is bytes. Keep in mind | |
| 1950 that (1) the conversion_end_type return values take the perspective of | |
| 1951 encoding; (2) the source for decoding is the same as the sink for | |
| 1952 encoding; (3) when writing, the data is given to us, and we set our own | |
| 1953 stream to be character mode or not; (4) when reading, the data comes | |
| 1954 from the other_end stream, and we set that one to be character mode or | |
| 1955 not. This is consistent with the comment above the prototype for | |
| 1956 Lstream_set_character_mode(), which lays out rules for who is allowed to | |
| 1957 modify the character type mode on a stream. | |
| 1958 | |
| 814 | 1959 If we're a read stream, we're always setting character mode on the |
| 1960 source, but we also set it on ourselves consistent with the flag that | |
| 1961 can disable this (see again the comment above | |
| 1962 Lstream_set_character_mode()). | |
| 1963 */ | |
| 771 | 1964 |
| 1965 static void | |
| 1966 set_coding_character_mode (Lstream *stream) | |
| 1967 { | |
| 1968 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1969 Lstream *stream_to_set = | |
| 1970 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end; | |
| 1971 if (encode_decode_source_sink_type_is_char | |
| 1972 (str->codesys, CODING_SOURCE, str->direction)) | |
| 1973 Lstream_set_character_mode (stream_to_set); | |
| 1974 else | |
| 1975 Lstream_unset_character_mode (stream_to_set); | |
| 814 | 1976 if (str->set_char_mode_on_us_when_reading && |
| 1977 (stream->flags & LSTREAM_FL_READ)) | |
| 1978 { | |
| 1979 if (encode_decode_source_sink_type_is_char | |
| 1980 (str->codesys, CODING_SINK, str->direction)) | |
| 1981 Lstream_set_character_mode (stream); | |
| 1982 else | |
| 1983 Lstream_unset_character_mode (stream); | |
| 1984 } | |
| 771 | 1985 } |
| 1986 | |
| 1987 static Lisp_Object | |
| 1988 coding_marker (Lisp_Object stream) | |
| 1989 { | |
| 1990 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream)); | |
| 1991 | |
| 1992 mark_object (str->orig_codesys); | |
| 1993 mark_object (str->codesys); | |
| 1994 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str)); | |
| 1995 return wrap_lstream (str->other_end); | |
| 1996 } | |
| 1997 | |
| 1998 static int | |
| 1999 coding_rewinder (Lstream *stream) | |
| 2000 { | |
| 2001 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2002 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str)); | |
| 2003 | |
| 2004 str->ch = 0; | |
| 2005 Dynarr_reset (str->convert_to); | |
| 2006 Dynarr_reset (str->convert_from); | |
| 2007 return Lstream_rewind (str->other_end); | |
| 2008 } | |
| 2009 | |
| 2010 static int | |
| 2011 coding_seekable_p (Lstream *stream) | |
| 2012 { | |
| 2013 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2014 return Lstream_seekable_p (str->other_end); | |
| 2015 } | |
| 2016 | |
| 2017 static int | |
| 2018 coding_flusher (Lstream *stream) | |
| 2019 { | |
| 2020 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2021 return Lstream_flush (str->other_end); | |
| 2022 } | |
| 2023 | |
| 2024 static int | |
| 2025 coding_closer (Lstream *stream) | |
| 2026 { | |
| 2027 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2028 if (stream->flags & LSTREAM_FL_WRITE) | |
| 2029 { | |
| 2030 str->eof = 1; | |
| 2031 coding_writer (stream, 0, 0); | |
| 2032 str->eof = 0; | |
| 2033 } | |
| 2034 /* It's safe to free the runoff dynarrs now because they are used only | |
| 2035 during conversion. We need to keep the type-specific data around, | |
| 2036 though, because of canonicalize_after_coding. */ | |
| 2037 if (str->convert_to) | |
| 2038 { | |
| 2039 Dynarr_free (str->convert_to); | |
| 2040 str->convert_to = 0; | |
| 2041 } | |
| 2042 if (str->convert_from) | |
| 428 | 2043 { |
| 771 | 2044 Dynarr_free (str->convert_from); |
| 2045 str->convert_from = 0; | |
| 2046 } | |
| 2047 | |
| 800 | 2048 if (str->no_close_other) |
| 2049 return Lstream_flush (str->other_end); | |
| 2050 else | |
| 2051 return Lstream_close (str->other_end); | |
| 771 | 2052 } |
| 2053 | |
| 2054 static void | |
| 2055 coding_finalizer (Lstream *stream) | |
| 2056 { | |
| 2057 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2058 | |
| 2059 assert (!str->finalized); | |
| 2060 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2061 if (str->data) | |
| 2062 { | |
| 1726 | 2063 xfree (str->data, void *); |
| 771 | 2064 str->data = 0; |
| 2065 } | |
| 2066 str->finalized = 1; | |
| 2067 } | |
| 2068 | |
| 2069 static Lisp_Object | |
| 2070 coding_stream_canonicalize_after_coding (Lstream *stream) | |
| 2071 { | |
| 2072 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2073 | |
| 2074 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding, | |
| 2075 (str), str->codesys); | |
| 2076 } | |
| 2077 | |
| 2078 Lisp_Object | |
| 2079 coding_stream_detected_coding_system (Lstream *stream) | |
| 2080 { | |
| 2081 Lisp_Object codesys = | |
| 2082 coding_stream_canonicalize_after_coding (stream); | |
| 2083 if (NILP (codesys)) | |
| 2084 return Fget_coding_system (Qidentity); | |
| 2085 return codesys; | |
| 2086 } | |
| 2087 | |
| 2088 Lisp_Object | |
| 2089 coding_stream_coding_system (Lstream *stream) | |
| 2090 { | |
| 2091 return CODING_STREAM_DATA (stream)->codesys; | |
| 2092 } | |
| 2093 | |
| 2094 /* Change the coding system associated with a stream. */ | |
| 2095 | |
| 2096 void | |
| 2097 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys) | |
| 2098 { | |
| 2099 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2100 if (EQ (str->orig_codesys, codesys)) | |
| 2101 return; | |
| 2102 /* We do the equivalent of closing the stream, destroying it, and | |
| 2103 reinitializing it. This includes flushing out the data and signalling | |
| 2104 EOF, if we're a writing stream; we also replace the type-specific data | |
| 2105 with the data appropriate for the new coding system. */ | |
| 2106 if (!NILP (str->codesys)) | |
| 2107 { | |
| 2108 if (lstr->flags & LSTREAM_FL_WRITE) | |
| 2109 { | |
| 2110 Lstream_flush (lstr); | |
| 2111 str->eof = 1; | |
| 2112 coding_writer (lstr, 0, 0); | |
| 2113 str->eof = 0; | |
| 2114 } | |
| 2115 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2116 } | |
| 2117 str->orig_codesys = codesys; | |
| 2118 str->codesys = coding_system_real_canonical (codesys); | |
| 2119 | |
| 2120 if (str->data) | |
| 2121 { | |
| 1726 | 2122 xfree (str->data, void *); |
| 771 | 2123 str->data = 0; |
| 428 | 2124 } |
| 771 | 2125 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size) |
| 1204 | 2126 { |
| 2127 str->data = | |
| 2128 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)-> | |
| 2129 coding_data_size); | |
| 2130 str->type = XCODING_SYSTEM_METHODS (str->codesys)->enumtype; | |
| 2131 } | |
| 771 | 2132 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str)); |
| 2133 /* The new coding system may have different ideas regarding whether its | |
| 2134 ends are characters or bytes. */ | |
| 2135 set_coding_character_mode (lstr); | |
| 2136 } | |
| 2137 | |
| 2138 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding | |
| 2139 stream for writing, no automatic code detection will be performed. | |
| 2140 The reason for this is that automatic code detection requires a | |
| 2141 seekable input. Things will also fail if you open a coding | |
| 2142 stream for reading using a non-fully-specified coding system and | |
| 2143 a non-seekable input stream. */ | |
| 2144 | |
| 2145 static Lisp_Object | |
| 2146 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys, | |
| 800 | 2147 const char *mode, enum encode_decode direction, |
| 802 | 2148 int flags) |
| 771 | 2149 { |
| 2150 Lstream *lstr = Lstream_new (lstream_coding, mode); | |
| 2151 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2152 | |
| 2153 codesys = Fget_coding_system (codesys); | |
| 2154 xzero (*str); | |
| 2155 str->codesys = Qnil; | |
| 2156 str->orig_codesys = Qnil; | |
| 2157 str->us = lstr; | |
| 2158 str->other_end = stream; | |
| 2159 str->convert_to = Dynarr_new (unsigned_char); | |
| 2160 str->convert_from = Dynarr_new (unsigned_char); | |
| 2161 str->direction = direction; | |
| 814 | 2162 if (flags & LSTREAM_FL_NO_CLOSE_OTHER) |
| 802 | 2163 str->no_close_other = 1; |
| 814 | 2164 if (flags & LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME) |
| 802 | 2165 str->one_byte_at_a_time = 1; |
| 814 | 2166 if (!(flags & LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING)) |
| 2167 str->set_char_mode_on_us_when_reading = 1; | |
| 802 | 2168 |
| 771 | 2169 set_coding_stream_coding_system (lstr, codesys); |
| 793 | 2170 return wrap_lstream (lstr); |
| 771 | 2171 } |
| 2172 | |
| 814 | 2173 /* FLAGS: |
| 2174 | |
| 2175 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2176 Don't close STREAM (the stream at the other end) when this stream is | |
| 2177 closed. | |
| 2178 | |
| 2179 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME | |
| 2180 When reading from STREAM, read and process one byte at a time rather | |
| 2181 than in large chunks. This is for reading from TTY's, so we don't | |
| 2182 block. #### We should instead create a non-blocking filedesc stream | |
| 2183 that emulates the behavior as necessary using select(), when the | |
| 2184 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2185 | |
| 2186 LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING | |
| 2187 When reading from STREAM, read and process one byte at a time rather | |
| 2188 than in large chunks. This is for reading from TTY's, so we don't | |
| 2189 block. #### We should instead create a non-blocking filedesc stream | |
| 2190 that emulates the behavior as necessary using select(), when the | |
| 2191 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2192 */ | |
| 771 | 2193 Lisp_Object |
| 2194 make_coding_input_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2195 enum encode_decode direction, int flags) |
| 771 | 2196 { |
| 800 | 2197 return make_coding_stream_1 (stream, codesys, "r", direction, |
| 802 | 2198 flags); |
| 771 | 2199 } |
| 2200 | |
| 814 | 2201 /* FLAGS: |
| 2202 | |
| 2203 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2204 Don't close STREAM (the stream at the other end) when this stream is | |
| 2205 closed. | |
| 2206 */ | |
| 771 | 2207 Lisp_Object |
| 2208 make_coding_output_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2209 enum encode_decode direction, int flags) |
| 771 | 2210 { |
| 800 | 2211 return make_coding_stream_1 (stream, codesys, "w", direction, |
| 802 | 2212 flags); |
| 771 | 2213 } |
| 2214 | |
| 2215 static Lisp_Object | |
| 2216 encode_decode_coding_region (Lisp_Object start, Lisp_Object end, | |
| 2217 Lisp_Object coding_system, Lisp_Object buffer, | |
| 2218 enum encode_decode direction) | |
| 2219 { | |
| 2220 Charbpos b, e; | |
| 2221 struct buffer *buf = decode_buffer (buffer, 0); | |
| 2222 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil; | |
| 2223 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil; | |
| 2224 Lisp_Object lb_outstream = Qnil; | |
| 2225 Lisp_Object next; | |
| 2226 Lstream *istr, *ostr; | |
| 2227 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
| 2228 struct gcpro ngcpro1; | |
| 2229 int source_char, sink_char; | |
| 2230 | |
| 2231 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 2232 barf_if_buffer_read_only (buf, b, e); | |
| 2233 | |
| 2234 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream); | |
| 2235 NGCPRO1 (auto_outstream); | |
| 2236 | |
| 2237 coding_system = Fget_coding_system (coding_system); | |
| 2238 source_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2239 CODING_SOURCE, | |
| 2240 direction); | |
| 2241 sink_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2242 CODING_SINK, | |
| 2243 direction); | |
| 2244 | |
| 2245 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */ | |
| 2246 instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 2247 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0); | |
| 2248 | |
| 2249 if (direction == CODING_DECODE && | |
| 2250 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT) | |
| 2251 next = auto_outstream = | |
| 2252 make_coding_output_stream | |
| 800 | 2253 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect), |
| 2254 CODING_DECODE, 0); | |
| 771 | 2255 |
| 2256 if (!sink_char) | |
| 2257 next = from_outstream = | |
| 800 | 2258 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0); |
| 771 | 2259 outstream = make_coding_output_stream (XLSTREAM (next), coding_system, |
| 800 | 2260 direction, 0); |
| 771 | 2261 if (!source_char) |
| 428 | 2262 { |
| 771 | 2263 to_outstream = |
| 2264 make_coding_output_stream (XLSTREAM (outstream), | |
| 800 | 2265 Qbinary, CODING_ENCODE, 0); |
| 771 | 2266 ostr = XLSTREAM (to_outstream); |
| 2267 } | |
| 2268 else | |
| 2269 ostr = XLSTREAM (outstream); | |
| 2270 istr = XLSTREAM (instream); | |
| 2271 | |
| 2272 /* The chain of streams looks like this: | |
| 2273 | |
| 2297 | 2274 [BUFFER] <----- (( read from/send to loop )) |
| 771 | 2275 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is |
| 2276 in bytes] | |
| 2277 ------> [ENCODE/DECODE AS SPECIFIED] | |
| 2278 ------> [BYTE->CHAR i.e. DECODE AS BINARY | |
| 2279 if sink is in bytes] | |
| 2280 ------> [AUTODETECT EOL if | |
| 2281 we're decoding and | |
| 2282 coding system calls | |
| 2283 for this] | |
| 2284 ------> [BUFFER] | |
| 2285 */ | |
| 2367 | 2286 |
| 2287 /* #### See comment | |
| 2288 | |
| 2289 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS | |
| 2290 | |
| 2291 in text.c. | |
| 2292 */ | |
| 2293 | |
| 771 | 2294 while (1) |
| 2295 { | |
| 2296 char tempbuf[1024]; /* some random amount */ | |
| 2297 Charbpos newpos, even_newer_pos; | |
| 2298 Charbpos oldpos = lisp_buffer_stream_startpos (istr); | |
| 2299 Bytecount size_in_bytes = | |
| 2300 Lstream_read (istr, tempbuf, sizeof (tempbuf)); | |
| 2301 | |
| 2302 if (!size_in_bytes) | |
| 2303 break; | |
| 2304 newpos = lisp_buffer_stream_startpos (istr); | |
| 2305 Lstream_write (ostr, tempbuf, size_in_bytes); | |
| 2306 even_newer_pos = lisp_buffer_stream_startpos (istr); | |
| 2307 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos), | |
| 2308 even_newer_pos, 0); | |
| 428 | 2309 } |
| 771 | 2310 |
| 2311 { | |
| 2312 Charcount retlen = | |
| 2313 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b; | |
| 2314 Lstream_close (istr); | |
| 2315 Lstream_close (ostr); | |
| 2316 NUNGCPRO; | |
| 2317 UNGCPRO; | |
| 2318 Lstream_delete (istr); | |
| 2319 if (!NILP (from_outstream)) | |
| 2320 Lstream_delete (XLSTREAM (from_outstream)); | |
| 2321 Lstream_delete (XLSTREAM (outstream)); | |
| 2322 if (!NILP (to_outstream)) | |
| 2323 Lstream_delete (XLSTREAM (to_outstream)); | |
| 2324 if (!NILP (auto_outstream)) | |
| 2325 Lstream_delete (XLSTREAM (auto_outstream)); | |
| 2326 Lstream_delete (XLSTREAM (lb_outstream)); | |
| 2327 return make_int (retlen); | |
| 2328 } | |
| 2329 } | |
| 2330 | |
| 3302 | 2331 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, |
| 2332 "*r\nzDecode from coding system: \ni", /* | |
| 771 | 2333 Decode the text between START and END which is encoded in CODING-SYSTEM. |
| 2334 This is useful if you've read in encoded text from a file without decoding | |
| 2335 it (e.g. you read in a JIS-formatted file but used the `binary' or | |
| 2336 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B"). | |
| 2337 Return length of decoded text. | |
| 3302 | 2338 BUFFER defaults to the current buffer if unspecified, and when interactive. |
| 771 | 2339 */ |
| 2340 (start, end, coding_system, buffer)) | |
| 2341 { | |
| 2342 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2343 CODING_DECODE); | |
| 2344 } | |
| 2345 | |
| 3302 | 2346 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, |
| 2347 "*r\nzEncode to coding system: \ni", /* | |
| 771 | 2348 Encode the text between START and END using CODING-SYSTEM. |
| 2349 This will, for example, convert Japanese characters into stuff such as | |
| 3302 | 2350 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded text. |
| 2351 BUFFER defaults to the current buffer if unspecified, and when interactive. | |
| 771 | 2352 */ |
| 2353 (start, end, coding_system, buffer)) | |
| 2354 { | |
| 2355 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2356 CODING_ENCODE); | |
| 428 | 2357 } |
| 2358 | |
|
4690
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|
2359 DEFUN ("query-coding-region", Fquery_coding_region, 3, 7, 0, /* |
|
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Move the #'query-coding-region implementation to C.
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|
2360 Work out whether CODING-SYSTEM can losslessly encode a region. |
|
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Move the #'query-coding-region implementation to C.
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|
2361 |
|
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Move the #'query-coding-region implementation to C.
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|
2362 START and END are the beginning and end of the region to check. |
|
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Move the #'query-coding-region implementation to C.
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|
2363 CODING-SYSTEM is the coding system to try. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2364 |
|
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Move the #'query-coding-region implementation to C.
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2365 Optional argument BUFFER is the buffer to check, and defaults to the current |
|
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Move the #'query-coding-region implementation to C.
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|
2366 buffer. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2367 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2368 IGNORE-INVALID-SEQUENCESP, also an optional argument, says to treat XEmacs |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2369 characters which have an unambiguous encoded representation, despite being |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2370 undefined in what they represent, as encodable. These chiefly arise with |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2371 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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|
2372 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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|
2373 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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|
2374 `invalid-sequence-coding-system' argument to `set-language-info'. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2375 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2376 They can also arise with fixed-length encodings like ISO 8859-7, where |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2377 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
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|
2378 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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|
2379 may lead to data that is not understood by other applications. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2380 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2381 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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diff
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|
2382 character in the region cannot be encoded, and defaults to nil. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2383 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2384 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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|
2385 region using `query-coding-warning-face'. It defaults to nil. |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2386 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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diff
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|
2387 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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|
2388 `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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|
2389 with it. The first result is `t' if the region can be encoded using |
|
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Move the #'query-coding-region implementation to C.
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|
2390 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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|
2391 CODING-SYSTEM, the second result is a range table describing the positions |
|
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Move the #'query-coding-region implementation to C.
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|
2392 of the unencodable characters. |
|
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Move the #'query-coding-region implementation to C.
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|
2393 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2394 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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|
2395 IGNORE-INVALID-SEQUENCESP non-nil map to the symbol `invalid-sequence'; |
|
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Move the #'query-coding-region implementation to C.
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|
2396 other ranges map to the symbol `unencodable'. If IGNORE-INVALID-SEQUENCESP |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2397 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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|
2398 `make-range-table' for more details of range tables. |
|
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|
2399 */ |
|
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|
2400 (start, end, coding_system, buffer, ignore_invalid_sequencesp, |
|
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|
2401 errorp, highlight)) |
|
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Move the #'query-coding-region implementation to C.
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2402 { |
|
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Move the #'query-coding-region implementation to C.
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|
2403 Charbpos b, e; |
|
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Move the #'query-coding-region implementation to C.
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|
2404 struct buffer *buf = decode_buffer (buffer, 1); |
|
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Move the #'query-coding-region implementation to C.
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|
2405 Lisp_Object result; |
|
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Move the #'query-coding-region implementation to C.
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|
2406 int flags = 0, speccount = specpdl_depth (); |
|
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Move the #'query-coding-region implementation to C.
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|
2407 |
|
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Move the #'query-coding-region implementation to C.
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|
2408 coding_system = Fget_coding_system (coding_system); |
|
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Move the #'query-coding-region implementation to C.
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|
2409 |
|
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Move the #'query-coding-region implementation to C.
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|
2410 get_buffer_range_char (buf, start, end, &b, &e, 0); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2411 |
|
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Move the #'query-coding-region implementation to C.
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|
2412 if (buf != current_buffer) |
|
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Move the #'query-coding-region implementation to C.
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|
2413 { |
|
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|
2414 record_unwind_protect (save_current_buffer_restore, Fcurrent_buffer ()); |
|
257b468bf2ca
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|
2415 set_buffer_internal (buf); |
|
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Move the #'query-coding-region implementation to C.
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|
2416 } |
|
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|
2417 |
|
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Move the #'query-coding-region implementation to C.
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|
2418 record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
|
257b468bf2ca
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|
2419 |
|
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Move the #'query-coding-region implementation to C.
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|
2420 BUF_SET_PT (buf, b); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
2421 |
|
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|
2422 if (!NILP (ignore_invalid_sequencesp)) |
|
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|
2423 { |
|
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|
2424 flags |= QUERY_METHOD_IGNORE_INVALID_SEQUENCES; |
|
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|
2425 } |
|
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|
2426 |
|
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2427 if (!NILP (errorp)) |
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2428 { |
|
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2429 flags |= QUERY_METHOD_ERRORP; |
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2430 } |
|
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2431 |
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2432 if (!NILP (highlight)) |
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2433 { |
|
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2434 flags |= QUERY_METHOD_HIGHLIGHT; |
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2435 } |
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2436 |
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2437 result = XCODESYSMETH_OR_GIVEN (coding_system, query, |
|
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2438 (coding_system, buf, e, flags), Qunbound); |
|
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2439 |
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2440 if (UNBOUNDP (result)) |
|
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2441 { |
|
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2442 signal_error (Qtext_conversion_error, |
|
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2443 "Coding system doesn't say what it can encode", |
|
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2444 XCODING_SYSTEM_NAME (coding_system)); |
|
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|
2445 } |
|
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|
2446 |
|
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|
2447 result = (NILP (result)) ? Qt : values2 (Qnil, result); |
|
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2448 |
|
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|
2449 return unbind_to_1 (speccount, result); |
|
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|
2450 } |
|
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|
2451 |
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|
2452 |
| 428 | 2453 |
| 2454 /************************************************************************/ | |
| 771 | 2455 /* Chain methods */ |
| 428 | 2456 /************************************************************************/ |
| 2457 | |
| 771 | 2458 /* #### Need a way to create "opposite-direction" coding systems. */ |
| 2459 | |
| 2460 /* Chain two or more coding systems together to make a combination coding | |
| 2461 system. */ | |
| 2462 | |
| 2463 struct chain_coding_system | |
| 2464 { | |
| 2465 /* List of coding systems, in decode order */ | |
| 2466 Lisp_Object *chain; | |
| 2467 /* Number of coding systems in list */ | |
| 2468 int count; | |
| 2469 /* Coding system to return as a result of canonicalize-after-coding */ | |
| 2470 Lisp_Object canonicalize_after_coding; | |
| 2471 }; | |
| 2472 | |
| 2473 struct chain_coding_stream | |
| 2474 { | |
| 2475 int initted; | |
| 2476 /* Lstreams for chain coding system */ | |
| 2477 Lisp_Object *lstreams; | |
| 2478 int lstream_count; | |
| 2479 }; | |
| 2480 | |
| 1204 | 2481 static const struct memory_description chain_coding_system_description[] = { |
| 2482 { XD_INT, offsetof (struct chain_coding_system, count) }, | |
| 2367 | 2483 { XD_BLOCK_PTR, offsetof (struct chain_coding_system, chain), |
| 2551 | 2484 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 1204 | 2485 { XD_LISP_OBJECT, offsetof (struct chain_coding_system, |
| 2486 canonicalize_after_coding) }, | |
| 771 | 2487 { XD_END } |
| 2488 }; | |
| 2489 | |
| 1204 | 2490 static const struct memory_description chain_coding_stream_description_1 [] = { |
| 2491 { XD_INT, offsetof (struct chain_coding_stream, lstream_count) }, | |
| 2367 | 2492 { XD_BLOCK_PTR, offsetof (struct chain_coding_stream, lstreams), |
| 2551 | 2493 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 771 | 2494 { XD_END } |
| 2495 }; | |
| 2496 | |
| 1204 | 2497 const struct sized_memory_description chain_coding_stream_description = { |
| 2498 sizeof (struct chain_coding_stream), chain_coding_stream_description_1 | |
| 2499 }; | |
| 2500 | |
| 2501 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (chain); | |
| 2502 | |
| 771 | 2503 static Lisp_Object |
| 2504 chain_canonicalize (Lisp_Object codesys) | |
| 2505 { | |
| 2506 /* We make use of the fact that this method is called at init time, after | |
| 2507 properties have been parsed. init_method is called too early. */ | |
| 2508 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2509 any more. */ | |
| 2510 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys), | |
| 2511 XCODING_SYSTEM_CHAIN_CHAIN (codesys)); | |
| 2512 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys), | |
| 2513 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys), | |
| 2514 chain)); | |
| 2515 Fputhash (chain, codesys, Vchain_canonicalize_hash_table); | |
| 2516 return codesys; | |
| 2517 } | |
| 2518 | |
| 2519 static Lisp_Object | |
| 2520 chain_canonicalize_after_coding (struct coding_stream *str) | |
| 2521 { | |
| 2522 Lisp_Object cac = | |
| 2523 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys); | |
| 2524 if (!NILP (cac)) | |
| 2525 return cac; | |
| 2526 return str->codesys; | |
| 2527 #if 0 | |
| 2528 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2529 Lisp_Object us = str->codesys, codesys; | |
| 2530 int i; | |
| 2531 Lisp_Object chain; | |
| 2532 Lisp_Object tail; | |
| 2533 int changed = 0; | |
| 2534 | |
| 2535 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2536 any more. */ | |
| 2537 if (str->direction == CODING_ENCODE || !data->initted) | |
| 2538 return us; | |
| 2539 | |
| 2540 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us), | |
| 2541 XCODING_SYSTEM_CHAIN_CHAIN (us)); | |
| 2542 | |
| 2543 tail = chain; | |
| 2544 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++) | |
| 2545 { | |
| 2546 codesys = (coding_stream_canonicalize_after_coding | |
| 2547 (XLSTREAM (data->lstreams[i]))); | |
| 2548 if (!EQ (codesys, XCAR (tail))) | |
| 2549 changed = 1; | |
| 2550 XCAR (tail) = codesys; | |
| 2551 tail = XCDR (tail); | |
| 2552 } | |
| 2553 | |
| 2554 if (!changed) | |
| 2555 return us; | |
| 2556 | |
| 2557 chain = delq_no_quit (Qnil, chain); | |
| 2558 | |
| 2559 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) && | |
| 2560 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us))) | |
| 2561 { | |
| 2562 if (NILP (chain)) | |
| 2563 return Qnil; | |
| 2564 if (NILP (XCDR (chain))) | |
| 2565 return XCAR (chain); | |
| 2566 } | |
| 2567 | |
| 2568 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us), | |
| 2569 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us), | |
| 2570 chain)), Vchain_canonicalize_hash_table, | |
| 2571 Qnil); | |
| 2572 if (!NILP (codesys)) | |
| 2573 return codesys; | |
| 2574 return make_internal_coding_system | |
| 2575 (us, "internal-chain-canonicalizer-wrapper", | |
| 2576 Qchain, Qunbound, list2 (Qchain, chain)); | |
| 2577 #endif /* 0 */ | |
| 2578 } | |
| 2579 | |
| 2580 static void | |
| 2581 chain_init (Lisp_Object codesys) | |
| 2582 { | |
| 2583 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil; | |
| 2584 } | |
| 2585 | |
| 2586 static void | |
| 2587 chain_mark (Lisp_Object codesys) | |
| 2588 { | |
| 2589 int i; | |
| 2590 | |
| 2591 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++) | |
| 2592 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]); | |
| 2593 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys)); | |
| 2594 } | |
| 2595 | |
| 2596 static void | |
| 2597 chain_mark_coding_stream_1 (struct chain_coding_stream *data) | |
| 2598 { | |
| 2599 int i; | |
| 2600 | |
| 2601 for (i = 0; i < data->lstream_count; i++) | |
| 2602 mark_object (data->lstreams[i]); | |
| 2603 } | |
| 2604 | |
| 2605 static void | |
| 2606 chain_mark_coding_stream (struct coding_stream *str) | |
| 2607 { | |
| 2608 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2609 } | |
| 2610 | |
| 2611 static void | |
| 2612 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 2613 { | |
| 2614 int i; | |
| 2615 | |
| 826 | 2616 write_c_string (printcharfun, "("); |
| 771 | 2617 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++) |
| 2618 { | |
| 826 | 2619 write_c_string (printcharfun, i == 0 ? "" : "->"); |
| 771 | 2620 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i], |
| 2621 printcharfun, escapeflag); | |
| 2622 } | |
| 2623 { | |
| 2624 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs); | |
| 2625 if (!NILP (cac)) | |
| 2626 { | |
| 2627 if (i > 0) | |
| 826 | 2628 write_c_string (printcharfun, " "); |
| 2629 write_c_string (printcharfun, "canonicalize-after-coding="); | |
| 771 | 2630 print_coding_system_in_print_method (cac, printcharfun, escapeflag); |
| 2631 } | |
| 2632 } | |
| 2633 | |
| 826 | 2634 write_c_string (printcharfun, ")"); |
| 771 | 2635 } |
| 2636 | |
| 2637 static void | |
| 2638 chain_rewind_coding_stream_1 (struct chain_coding_stream *data) | |
| 2639 { | |
| 2640 /* Each will rewind the next; there is always at least one stream (the | |
| 2641 dynarr stream at the end) if we're initted */ | |
| 2642 if (data->initted) | |
| 2643 Lstream_rewind (XLSTREAM (data->lstreams[0])); | |
| 2644 } | |
| 2645 | |
| 2646 static void | |
| 2647 chain_rewind_coding_stream (struct coding_stream *str) | |
| 2648 { | |
| 2649 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2650 } | |
| 2651 | |
| 2652 static void | |
| 2653 chain_init_coding_streams_1 (struct chain_coding_stream *data, | |
| 2654 unsigned_char_dynarr *dst, | |
| 2655 int ncodesys, Lisp_Object *codesys, | |
| 2656 enum encode_decode direction) | |
| 2657 { | |
| 2658 int i; | |
| 2659 Lisp_Object lstream_out; | |
| 2660 | |
| 2661 data->lstream_count = ncodesys + 1; | |
| 2662 data->lstreams = xnew_array (Lisp_Object, data->lstream_count); | |
| 2663 | |
| 2664 lstream_out = make_dynarr_output_stream (dst); | |
| 2665 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0); | |
| 2666 data->lstreams[data->lstream_count - 1] = lstream_out; | |
| 2667 | |
| 2668 for (i = ncodesys - 1; i >= 0; i--) | |
| 2669 { | |
| 2670 data->lstreams[i] = | |
| 2671 make_coding_output_stream | |
| 2672 (XLSTREAM (lstream_out), | |
| 2673 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i], | |
| 800 | 2674 direction, 0); |
| 771 | 2675 lstream_out = data->lstreams[i]; |
| 2676 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, | |
| 2677 0); | |
| 2678 } | |
| 2679 data->initted = 1; | |
| 2680 } | |
| 2681 | |
| 2682 static Bytecount | |
| 2683 chain_convert (struct coding_stream *str, const UExtbyte *src, | |
| 2684 unsigned_char_dynarr *dst, Bytecount n) | |
| 2685 { | |
| 2686 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2687 | |
| 2688 if (str->eof) | |
| 2689 { | |
| 2690 /* Each will close the next; there is always at least one stream (the | |
| 2691 dynarr stream at the end) if we're initted. We need to close now | |
| 2692 because more data may be generated. */ | |
| 2693 if (data->initted) | |
| 2694 Lstream_close (XLSTREAM (data->lstreams[0])); | |
| 2695 return n; | |
| 2696 } | |
| 2697 | |
| 2698 if (!data->initted) | |
| 2699 chain_init_coding_streams_1 | |
| 2700 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys), | |
| 2701 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction); | |
| 2702 | |
| 2703 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0) | |
| 2704 return -1; | |
| 2705 return n; | |
| 2706 } | |
| 2707 | |
| 2708 static void | |
| 2709 chain_finalize_coding_stream_1 (struct chain_coding_stream *data) | |
| 2710 { | |
| 2711 if (data->lstreams) | |
| 2712 { | |
| 2297 | 2713 /* During GC, these objects are unmarked, and are about to be freed. |
| 2714 We do NOT want them on the free list, and that will cause lots of | |
| 2715 nastiness including crashes. Just let them be freed normally. */ | |
| 771 | 2716 if (!gc_in_progress) |
| 2717 { | |
| 2718 int i; | |
| 2297 | 2719 /* Order of deletion is important here! Delete from the head of |
| 2720 the chain and work your way towards the tail. In general, | |
| 2721 when you delete an object, there should be *NO* pointers to it | |
| 2722 anywhere. Deleting back-to-front would be a problem because | |
| 2723 there are pointers going forward. If there were pointers in | |
| 2724 both directions, you'd have to disconnect the pointers to a | |
| 2725 particular object before deleting it. */ | |
| 771 | 2726 for (i = 0; i < data->lstream_count; i++) |
| 2727 Lstream_delete (XLSTREAM ((data->lstreams)[i])); | |
| 2728 } | |
| 1726 | 2729 xfree (data->lstreams, Lisp_Object *); |
| 771 | 2730 } |
| 2731 } | |
| 2732 | |
| 2733 static void | |
| 2734 chain_finalize_coding_stream (struct coding_stream *str) | |
| 2735 { | |
| 2736 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2737 } | |
| 2738 | |
| 2739 static void | |
| 2740 chain_finalize (Lisp_Object c) | |
| 2741 { | |
| 2742 if (XCODING_SYSTEM_CHAIN_CHAIN (c)) | |
| 1726 | 2743 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c), Lisp_Object *); |
| 771 | 2744 } |
| 2745 | |
| 428 | 2746 static int |
| 771 | 2747 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 2748 { | |
| 2749 if (EQ (key, Qchain)) | |
| 2750 { | |
| 2751 Lisp_Object *cslist; | |
| 2752 int count = 0; | |
| 2753 int i; | |
| 2754 | |
| 2367 | 2755 { |
| 2756 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2757 { | |
| 2758 Fget_coding_system (elt); | |
| 2759 count++; | |
| 2760 } | |
| 2761 } | |
| 771 | 2762 |
| 2763 cslist = xnew_array (Lisp_Object, count); | |
| 2764 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist; | |
| 2765 | |
| 2766 count = 0; | |
| 2367 | 2767 { |
| 2768 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2769 { | |
| 2770 cslist[count] = Fget_coding_system (elt); | |
| 2771 count++; | |
| 2772 } | |
| 2773 } | |
| 771 | 2774 |
| 2775 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count; | |
| 2776 | |
| 2777 for (i = 0; i < count - 1; i++) | |
| 2778 { | |
| 2779 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) != | |
| 2780 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE)) | |
| 2781 invalid_argument_2 ("Sink of first must match source of second", | |
| 2782 cslist[i], cslist[i + 1]); | |
| 2783 } | |
| 2784 } | |
| 2785 else if (EQ (key, Qcanonicalize_after_coding)) | |
| 2786 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = | |
| 2787 Fget_coding_system (value); | |
| 2788 else | |
| 2789 return 0; | |
| 2790 return 1; | |
| 2791 } | |
| 2792 | |
| 2793 static Lisp_Object | |
| 2794 chain_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 2795 { | |
| 2796 if (EQ (prop, Qchain)) | |
| 2797 { | |
| 2798 Lisp_Object result = Qnil; | |
| 2799 int i; | |
| 2800 | |
| 2801 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++) | |
| 2802 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i], | |
| 2803 result); | |
| 2804 | |
| 2805 return Fnreverse (result); | |
| 2806 } | |
| 2807 else if (EQ (prop, Qcanonicalize_after_coding)) | |
| 2808 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system); | |
| 2809 else | |
| 2810 return Qunbound; | |
| 2811 } | |
| 2812 | |
| 2813 static enum source_sink_type | |
| 2814 chain_conversion_end_type (Lisp_Object codesys) | |
| 2815 { | |
| 2816 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys); | |
| 2817 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys); | |
| 2818 int charp_source, charp_sink; | |
| 2819 | |
| 2820 if (n == 0) | |
| 2821 return DECODES_BYTE_TO_BYTE; /* arbitrary */ | |
| 2822 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE); | |
| 2823 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK); | |
| 2824 | |
| 2825 switch (charp_source * 2 + charp_sink) | |
| 2826 { | |
| 2827 case 0: return DECODES_BYTE_TO_BYTE; | |
| 2828 case 1: return DECODES_BYTE_TO_CHARACTER; | |
| 2829 case 2: return DECODES_CHARACTER_TO_BYTE; | |
| 2830 case 3: return DECODES_CHARACTER_TO_CHARACTER; | |
| 2831 } | |
| 2832 | |
| 2500 | 2833 ABORT (); |
| 771 | 2834 return DECODES_BYTE_TO_BYTE; |
| 2835 } | |
| 2836 | |
| 2837 | |
| 2838 /************************************************************************/ | |
| 2839 /* No-conversion methods */ | |
| 2840 /************************************************************************/ | |
| 2841 | |
| 2842 /* "No conversion"; used for binary files. We use quotes because there | |
| 2843 really is some conversion being applied (it does byte<->char | |
| 2844 conversion), but it appears to the user as if the text is read in | |
| 2297 | 2845 without conversion. |
| 2846 | |
| 2847 #### Shouldn't we _call_ it that, then? And while we're at it, | |
| 2848 separate it into "to_internal" and "to_external"? */ | |
| 771 | 2849 DEFINE_CODING_SYSTEM_TYPE (no_conversion); |
| 2850 | |
| 2851 /* This is used when reading in "binary" files -- i.e. files that may | |
| 2852 contain all 256 possible byte values and that are not to be | |
| 2853 interpreted as being in any particular encoding. */ | |
| 2854 static Bytecount | |
| 2855 no_conversion_convert (struct coding_stream *str, | |
| 2856 const UExtbyte *src, | |
| 2857 unsigned_char_dynarr *dst, Bytecount n) | |
| 2858 { | |
| 2859 UExtbyte c; | |
| 2860 unsigned int ch = str->ch; | |
| 2861 Bytecount orign = n; | |
| 2862 | |
| 2863 if (str->direction == CODING_DECODE) | |
| 2864 { | |
| 2865 while (n--) | |
| 2866 { | |
| 2867 c = *src++; | |
| 2868 | |
| 2869 DECODE_ADD_BINARY_CHAR (c, dst); | |
| 2870 } | |
| 2871 | |
| 2872 if (str->eof) | |
| 2873 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst); | |
| 2874 } | |
| 2875 else | |
| 2876 { | |
| 2877 | |
| 2878 while (n--) | |
| 2879 { | |
| 2880 c = *src++; | |
| 826 | 2881 if (byte_ascii_p (c)) |
| 771 | 2882 { |
| 2883 assert (ch == 0); | |
| 2884 Dynarr_add (dst, c); | |
| 2885 } | |
| 2886 #ifdef MULE | |
| 867 | 2887 else if (ibyte_leading_byte_p (c)) |
| 771 | 2888 { |
| 2889 assert (ch == 0); | |
| 2890 if (c == LEADING_BYTE_LATIN_ISO8859_1 || | |
| 2891 c == LEADING_BYTE_CONTROL_1) | |
| 2892 ch = c; | |
| 2893 else | |
| 2297 | 2894 /* #### This is just plain unacceptable. */ |
| 771 | 2895 Dynarr_add (dst, '~'); /* untranslatable character */ |
| 2896 } | |
| 2897 else | |
| 2898 { | |
| 2899 if (ch == LEADING_BYTE_LATIN_ISO8859_1) | |
| 2900 Dynarr_add (dst, c); | |
| 2901 else if (ch == LEADING_BYTE_CONTROL_1) | |
| 2902 { | |
| 2903 assert (c < 0xC0); | |
| 2904 Dynarr_add (dst, c - 0x20); | |
| 2905 } | |
| 2906 /* else it should be the second or third byte of an | |
| 2907 untranslatable character, so ignore it */ | |
| 2908 ch = 0; | |
| 2909 } | |
| 2910 #endif /* MULE */ | |
| 2911 | |
| 2912 } | |
| 2913 } | |
| 2914 | |
| 2915 str->ch = ch; | |
| 2916 return orign; | |
| 2917 } | |
| 2918 | |
| 2919 DEFINE_DETECTOR (no_conversion); | |
| 2920 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 2921 | |
| 2922 struct no_conversion_detector | |
| 2923 { | |
| 2924 int dummy; | |
| 2925 }; | |
| 2926 | |
| 2927 static void | |
| 2286 | 2928 no_conversion_detect (struct detection_state *st, const UExtbyte *UNUSED (src), |
| 2929 Bytecount UNUSED (n)) | |
| 771 | 2930 { |
| 2931 /* Hack until we get better handling of this stuff! */ | |
| 2932 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY; | |
| 2933 } | |
| 2934 | |
| 2935 | |
| 2936 /************************************************************************/ | |
| 2937 /* Convert-eol methods */ | |
| 2938 /************************************************************************/ | |
| 2939 | |
| 2940 /* This is used to handle end-of-line (EOL) differences. It is | |
| 2819 | 2941 character-to-character, and works (when encoding) *BEFORE* sending data to |
| 2942 the main encoding routine -- thus, that routine must handle different EOL | |
| 2943 types itself if it does line-oriented type processing. This is unavoidable | |
| 2944 because we don't know whether the output of the main encoding routine is | |
| 2945 ASCII compatible (UTF-16 is definitely not, for example). [[ sjt sez this | |
| 2946 is bogus. There should be _no_ EOL processing (or processing of any kind) | |
| 2947 after conversion to external. ]] | |
| 771 | 2948 |
| 793 | 2949 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil. |
| 771 | 2950 */ |
| 2951 | |
| 2952 struct convert_eol_coding_system | |
| 2953 { | |
| 2954 enum eol_type subtype; | |
| 2132 | 2955 int dummy; /* On some architectures (eg ia64) the portable dumper can |
| 2956 produce unaligned access errors without this field. Probably | |
| 2957 because the combined structure of this structure and | |
| 2958 Lisp_Coding_System is not properly aligned. */ | |
| 771 | 2959 }; |
| 2960 | |
| 2961 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2962 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2963 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2964 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2965 | |
| 2966 struct convert_eol_coding_stream | |
| 2967 { | |
| 2968 enum eol_type actual; | |
| 2969 }; | |
| 2970 | |
| 1204 | 2971 static const struct memory_description |
| 771 | 2972 convert_eol_coding_system_description[] = { |
| 2973 { XD_END } | |
| 2974 }; | |
| 2975 | |
| 1204 | 2976 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol); |
| 2977 | |
| 771 | 2978 static void |
| 2286 | 2979 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun, |
| 2980 int UNUSED (escapeflag)) | |
| 771 | 2981 { |
| 2982 struct convert_eol_coding_system *data = | |
| 2983 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol); | |
| 2984 | |
| 2985 write_fmt_string (printcharfun, "(%s)", | |
| 2986 data->subtype == EOL_LF ? "lf" : | |
| 2987 data->subtype == EOL_CRLF ? "crlf" : | |
| 2988 data->subtype == EOL_CR ? "cr" : | |
| 793 | 2989 data->subtype == EOL_AUTODETECT ? "nil" : |
| 2500 | 2990 (ABORT(), "")); |
| 771 | 2991 } |
| 2992 | |
| 2993 static enum source_sink_type | |
| 2286 | 2994 convert_eol_conversion_end_type (Lisp_Object UNUSED (codesys)) |
| 771 | 2995 { |
| 2996 return DECODES_CHARACTER_TO_CHARACTER; | |
| 2997 } | |
| 2998 | |
| 2999 static int | |
| 3000 convert_eol_putprop (Lisp_Object codesys, | |
| 3001 Lisp_Object key, | |
| 3002 Lisp_Object value) | |
| 3003 { | |
| 3004 struct convert_eol_coding_system *data = | |
| 3005 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol); | |
| 3006 | |
| 3007 if (EQ (key, Qsubtype)) | |
| 3008 { | |
| 3009 if (EQ (value, Qlf) /* || EQ (value, Qunix) */) | |
| 3010 data->subtype = EOL_LF; | |
| 3011 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */) | |
| 3012 data->subtype = EOL_CRLF; | |
| 3013 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */) | |
| 3014 data->subtype = EOL_CR; | |
| 793 | 3015 else if (EQ (value, Qnil)) |
| 771 | 3016 data->subtype = EOL_AUTODETECT; |
| 3017 else invalid_constant ("Unrecognized eol type", value); | |
| 3018 } | |
| 3019 else | |
| 3020 return 0; | |
| 3021 return 1; | |
| 3022 } | |
| 3023 | |
| 3024 static Lisp_Object | |
| 3025 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 3026 { | |
| 3027 struct convert_eol_coding_system *data = | |
| 3028 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol); | |
| 3029 | |
| 3030 if (EQ (prop, Qsubtype)) | |
| 3031 { | |
| 3032 switch (data->subtype) | |
| 3033 { | |
| 3034 case EOL_LF: return Qlf; | |
| 3035 case EOL_CRLF: return Qcrlf; | |
| 3036 case EOL_CR: return Qcr; | |
| 793 | 3037 case EOL_AUTODETECT: return Qnil; |
| 2500 | 3038 default: ABORT (); |
| 771 | 3039 } |
| 3040 } | |
| 3041 | |
| 3042 return Qunbound; | |
| 3043 } | |
| 3044 | |
| 3045 static void | |
| 3046 convert_eol_init_coding_stream (struct coding_stream *str) | |
| 3047 { | |
| 3048 struct convert_eol_coding_stream *data = | |
| 3049 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3050 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 3051 } | |
| 3052 | |
| 3053 static Bytecount | |
| 867 | 3054 convert_eol_convert (struct coding_stream *str, const Ibyte *src, |
| 771 | 3055 unsigned_char_dynarr *dst, Bytecount n) |
| 3056 { | |
| 3057 if (str->direction == CODING_DECODE) | |
| 3058 { | |
| 3059 struct convert_eol_coding_stream *data = | |
| 3060 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3061 | |
| 3062 if (data->actual == EOL_AUTODETECT) | |
| 3063 { | |
| 3064 Bytecount n2 = n; | |
| 867 | 3065 const Ibyte *src2 = src; |
| 771 | 3066 |
| 3067 for (; n2; n2--) | |
| 3068 { | |
| 867 | 3069 Ibyte c = *src2++; |
| 771 | 3070 if (c == '\n') |
| 3071 { | |
| 3072 data->actual = EOL_LF; | |
| 3073 break; | |
| 3074 } | |
| 3075 else if (c == '\r') | |
| 3076 { | |
| 3077 if (n2 == 1) | |
| 3078 { | |
| 3079 /* If we're seeing a '\r' at the end of the data, then | |
| 3080 reject the '\r' right now so it doesn't become an | |
| 3081 issue in the code below -- unless we're at the end of | |
| 3082 the stream, in which case we can't do that (because | |
| 3083 then the '\r' will never get written out), and in any | |
| 3084 case we should be recognizing it at EOL_CR format. */ | |
| 3085 if (str->eof) | |
| 3086 data->actual = EOL_CR; | |
| 3087 else | |
| 3088 n--; | |
| 3089 break; | |
| 3090 } | |
| 3091 else if (*src2 == '\n') | |
| 3092 data->actual = EOL_CRLF; | |
| 3093 else | |
| 3094 data->actual = EOL_CR; | |
| 3095 break; | |
| 3096 } | |
| 3097 } | |
| 3098 } | |
| 3099 | |
| 3100 /* str->eof is set, the caller reached EOF on the other end and has | |
| 3101 no new data to give us. The only data we get is the data we | |
| 3102 rejected from last time. */ | |
| 3103 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT || | |
| 3104 (str->eof)) | |
| 3105 Dynarr_add_many (dst, src, n); | |
| 3106 else | |
| 3107 { | |
| 867 | 3108 const Ibyte *end = src + n; |
| 771 | 3109 while (1) |
| 3110 { | |
| 3111 /* Find the next section with no \r and add it. */ | |
| 867 | 3112 const Ibyte *runstart = src; |
| 3113 src = (Ibyte *) memchr (src, '\r', end - src); | |
| 771 | 3114 if (!src) |
| 3115 src = end; | |
| 3116 Dynarr_add_many (dst, runstart, src - runstart); | |
| 3117 /* Stop if at end ... */ | |
| 3118 if (src == end) | |
| 3119 break; | |
| 3120 /* ... else, translate as necessary. */ | |
| 3121 src++; | |
| 3122 if (data->actual == EOL_CR) | |
| 3123 Dynarr_add (dst, '\n'); | |
| 3124 /* We need to be careful here with CRLF. If we see a CR at the | |
| 3125 end of the data, we don't know if it's part of a CRLF, so we | |
| 3126 reject it. Otherwise: If it's part of a CRLF, eat it and | |
| 3127 loop; the following LF gets added next time around. If it's | |
| 3128 not part of a CRLF, add the CR and loop. The following | |
| 3129 character will be processed in the next loop iteration. This | |
| 3130 correctly handles a sequence like CR+CR+LF. */ | |
| 3131 else if (src == end) | |
| 3132 return n - 1; /* reject the CR at the end; we'll get it again | |
| 3133 next time the convert method is called */ | |
| 3134 else if (*src != '\n') | |
| 3135 Dynarr_add (dst, '\r'); | |
| 3136 } | |
| 3137 } | |
| 3138 | |
| 3139 return n; | |
| 3140 } | |
| 3141 else | |
| 3142 { | |
| 3143 enum eol_type subtype = | |
| 3144 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 867 | 3145 const Ibyte *end = src + n; |
| 771 | 3146 |
| 3147 /* We try to be relatively efficient here. */ | |
| 3148 if (subtype == EOL_LF) | |
| 3149 Dynarr_add_many (dst, src, n); | |
| 3150 else | |
| 3151 { | |
| 3152 while (1) | |
| 3153 { | |
| 3154 /* Find the next section with no \n and add it. */ | |
| 867 | 3155 const Ibyte *runstart = src; |
| 3156 src = (Ibyte *) memchr (src, '\n', end - src); | |
| 771 | 3157 if (!src) |
| 3158 src = end; | |
| 3159 Dynarr_add_many (dst, runstart, src - runstart); | |
| 3160 /* Stop if at end ... */ | |
| 3161 if (src == end) | |
| 3162 break; | |
| 3163 /* ... else, skip over \n and add its translation. */ | |
| 3164 src++; | |
| 3165 Dynarr_add (dst, '\r'); | |
| 3166 if (subtype == EOL_CRLF) | |
| 3167 Dynarr_add (dst, '\n'); | |
| 3168 } | |
| 3169 } | |
| 3170 | |
| 3171 return n; | |
| 3172 } | |
| 3173 } | |
| 3174 | |
| 3175 static Lisp_Object | |
| 3176 convert_eol_canonicalize_after_coding (struct coding_stream *str) | |
| 3177 { | |
| 3178 struct convert_eol_coding_stream *data = | |
| 3179 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3180 | |
| 3181 if (str->direction == CODING_ENCODE) | |
| 3182 return str->codesys; | |
| 3183 | |
| 3184 switch (data->actual) | |
| 3185 { | |
| 3186 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf); | |
| 3187 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf); | |
| 3188 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr); | |
| 3189 case EOL_AUTODETECT: return str->codesys; | |
| 2500 | 3190 default: ABORT (); return Qnil; |
| 771 | 3191 } |
| 3192 } | |
| 3193 | |
| 3194 | |
| 3195 /************************************************************************/ | |
| 3196 /* Undecided methods */ | |
| 3197 /************************************************************************/ | |
| 3198 | |
| 3199 /* Do autodetection. We can autodetect the EOL type only, the coding | |
| 3200 system only, or both. We only do autodetection when decoding; when | |
| 3201 encoding, we just pass the data through. | |
| 3202 | |
| 3203 When doing just EOL detection, a coding system can be specified; if so, | |
| 3204 we will decode this data through the coding system before doing EOL | |
| 3205 detection. The reason for specifying this is so that | |
| 3206 canonicalize-after-coding works: We will canonicalize the specified | |
| 3207 coding system into the appropriate EOL type. When doing both coding and | |
| 3208 EOL detection, we do similar canonicalization, and also catch situations | |
| 3209 where the EOL type is overspecified, i.e. the detected coding system | |
| 3210 specifies an EOL type, and either switch to the equivalent | |
| 3211 non-EOL-processing coding system (if possible), or terminate EOL | |
| 3212 detection and use the specified EOL type. This prevents data from being | |
| 3213 EOL-processed twice. | |
| 3214 */ | |
| 3215 | |
| 3216 struct undecided_coding_system | |
| 3217 { | |
| 3218 int do_eol, do_coding; | |
| 3219 Lisp_Object cs; | |
| 3220 }; | |
| 3221 | |
| 3222 struct undecided_coding_stream | |
| 3223 { | |
| 3224 Lisp_Object actual; | |
| 3225 /* Either 2 or 3 lstreams here; see undecided_convert */ | |
| 3226 struct chain_coding_stream c; | |
| 3227 | |
| 3228 struct detection_state *st; | |
| 3229 }; | |
| 3230 | |
| 1204 | 3231 static const struct memory_description undecided_coding_system_description[] = { |
| 3232 { XD_LISP_OBJECT, offsetof (struct undecided_coding_system, cs) }, | |
| 771 | 3233 { XD_END } |
| 3234 }; | |
| 3235 | |
| 1204 | 3236 static const struct memory_description undecided_coding_stream_description_1 [] = { |
| 3237 { XD_LISP_OBJECT, offsetof (struct undecided_coding_stream, actual) }, | |
| 2367 | 3238 { XD_BLOCK_ARRAY, offsetof (struct undecided_coding_stream, c), |
| 2551 | 3239 1, { &chain_coding_stream_description } }, |
| 1204 | 3240 { XD_END } |
| 3241 }; | |
| 3242 | |
| 3243 const struct sized_memory_description undecided_coding_stream_description = { | |
| 3244 sizeof (struct undecided_coding_stream), undecided_coding_stream_description_1 | |
| 3245 }; | |
| 3246 | |
| 3247 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (undecided); | |
| 3248 | |
| 771 | 3249 static void |
| 3250 undecided_init (Lisp_Object codesys) | |
| 3251 { | |
| 3252 struct undecided_coding_system *data = | |
| 3253 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3254 | |
| 3255 data->cs = Qnil; | |
| 3256 } | |
| 3257 | |
| 3258 static void | |
| 3259 undecided_mark (Lisp_Object codesys) | |
| 3260 { | |
| 3261 struct undecided_coding_system *data = | |
| 3262 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3263 | |
| 3264 mark_object (data->cs); | |
| 3265 } | |
| 3266 | |
| 3267 static void | |
| 3268 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 3269 { | |
| 3270 struct undecided_coding_system *data = | |
| 3271 XCODING_SYSTEM_TYPE_DATA (cs, undecided); | |
| 3272 int need_space = 0; | |
| 3273 | |
| 826 | 3274 write_c_string (printcharfun, "("); |
| 771 | 3275 if (data->do_eol) |
| 3276 { | |
| 826 | 3277 write_c_string (printcharfun, "do-eol"); |
| 771 | 3278 need_space = 1; |
| 3279 } | |
| 3280 if (data->do_coding) | |
| 3281 { | |
| 3282 if (need_space) | |
| 826 | 3283 write_c_string (printcharfun, " "); |
| 3284 write_c_string (printcharfun, "do-coding"); | |
| 771 | 3285 need_space = 1; |
| 3286 } | |
| 3287 if (!NILP (data->cs)) | |
| 3288 { | |
| 3289 if (need_space) | |
| 826 | 3290 write_c_string (printcharfun, " "); |
| 3291 write_c_string (printcharfun, "coding-system="); | |
| 771 | 3292 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag); |
| 3293 } | |
| 826 | 3294 write_c_string (printcharfun, ")"); |
| 771 | 3295 } |
| 3296 | |
| 3297 static void | |
| 3298 undecided_mark_coding_stream (struct coding_stream *str) | |
| 3299 { | |
| 1204 | 3300 mark_object (CODING_STREAM_TYPE_DATA (str, undecided)->actual); |
| 771 | 3301 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); |
| 3302 } | |
| 3303 | |
| 3304 static int | |
| 3305 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) | |
| 3306 { | |
| 3307 struct undecided_coding_system *data = | |
| 3308 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3309 | |
| 3310 if (EQ (key, Qdo_eol)) | |
| 3311 data->do_eol = 1; | |
| 3312 else if (EQ (key, Qdo_coding)) | |
| 3313 data->do_coding = 1; | |
| 3314 else if (EQ (key, Qcoding_system)) | |
| 3315 data->cs = get_coding_system_for_text_file (value, 0); | |
| 3316 else | |
| 3317 return 0; | |
| 3318 return 1; | |
| 3319 } | |
| 3320 | |
| 3321 static Lisp_Object | |
| 3322 undecided_getprop (Lisp_Object codesys, Lisp_Object prop) | |
| 3323 { | |
| 3324 struct undecided_coding_system *data = | |
| 3325 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3326 | |
| 3327 if (EQ (prop, Qdo_eol)) | |
| 3328 return data->do_eol ? Qt : Qnil; | |
| 3329 if (EQ (prop, Qdo_coding)) | |
| 3330 return data->do_coding ? Qt : Qnil; | |
| 3331 if (EQ (prop, Qcoding_system)) | |
| 3332 return data->cs; | |
| 3333 return Qunbound; | |
| 3334 } | |
| 3335 | |
| 3336 static struct detection_state * | |
| 3337 allocate_detection_state (void) | |
| 3338 { | |
| 3339 int i; | |
| 3340 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3341 struct detection_state *block; | |
| 3342 | |
| 3343 for (i = 0; i < coding_detector_count; i++) | |
| 3344 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3345 | |
| 3346 block = (struct detection_state *) xmalloc_and_zero (size); | |
| 3347 | |
| 3348 size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3349 for (i = 0; i < coding_detector_count; i++) | |
| 3350 { | |
| 3351 block->data_offset[i] = size; | |
| 3352 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3353 } | |
| 3354 | |
| 3355 return block; | |
| 3356 } | |
| 3357 | |
| 3358 static void | |
| 3359 free_detection_state (struct detection_state *st) | |
| 3360 { | |
| 3361 int i; | |
| 3362 | |
| 3363 for (i = 0; i < coding_detector_count; i++) | |
| 3364 { | |
| 3365 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method) | |
| 3366 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method | |
| 3367 (st); | |
| 3368 } | |
| 3369 | |
| 1726 | 3370 xfree (st, struct detection_state *); |
| 771 | 3371 } |
| 3372 | |
| 3373 static int | |
| 3374 coding_category_symbol_to_id (Lisp_Object symbol) | |
| 428 | 3375 { |
| 3376 int i; | |
| 3377 | |
| 3378 CHECK_SYMBOL (symbol); | |
| 771 | 3379 for (i = 0; i < coding_detector_count; i++) |
| 3380 { | |
| 3381 detector_category_dynarr *cats = | |
| 3382 Dynarr_at (all_coding_detectors, i).cats; | |
| 3383 int j; | |
| 3384 | |
| 3385 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3386 if (EQ (Dynarr_at (cats, j).sym, symbol)) | |
| 3387 return Dynarr_at (cats, j).id; | |
| 3388 } | |
| 3389 | |
| 563 | 3390 invalid_constant ("Unrecognized coding category", symbol); |
| 1204 | 3391 RETURN_NOT_REACHED (0); |
| 428 | 3392 } |
| 3393 | |
| 771 | 3394 static Lisp_Object |
| 3395 coding_category_id_to_symbol (int id) | |
| 428 | 3396 { |
| 3397 int i; | |
| 771 | 3398 |
| 3399 for (i = 0; i < coding_detector_count; i++) | |
| 3400 { | |
| 3401 detector_category_dynarr *cats = | |
| 3402 Dynarr_at (all_coding_detectors, i).cats; | |
| 3403 int j; | |
| 3404 | |
| 3405 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3406 if (id == Dynarr_at (cats, j).id) | |
| 3407 return Dynarr_at (cats, j).sym; | |
| 3408 } | |
| 3409 | |
| 2500 | 3410 ABORT (); |
| 771 | 3411 return Qnil; /* (usually) not reached */ |
| 428 | 3412 } |
| 3413 | |
| 771 | 3414 static Lisp_Object |
| 3415 detection_result_number_to_symbol (enum detection_result result) | |
| 428 | 3416 { |
| 1494 | 3417 /* let compiler warn if not all enumerators are handled */ |
| 3418 switch (result) { | |
| 3419 #define FROB(sym, num) case num: return (sym) | |
| 771 | 3420 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); |
| 3421 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3422 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3423 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3424 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3425 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3426 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3427 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3428 #undef FROB | |
| 1494 | 3429 } |
| 771 | 3430 |
| 2500 | 3431 ABORT (); |
| 771 | 3432 return Qnil; /* (usually) not reached */ |
| 3433 } | |
| 3434 | |
| 778 | 3435 #if 0 /* not used */ |
| 771 | 3436 static enum detection_result |
| 3437 detection_result_symbol_to_number (Lisp_Object symbol) | |
| 3438 { | |
| 1494 | 3439 /* using switch here would be bad style, and doesn't help */ |
| 771 | 3440 #define FROB(sym, num) if (EQ (symbol, sym)) return (num) |
| 3441 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); | |
| 3442 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3443 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3444 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3445 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3446 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3447 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3448 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3449 #undef FROB | |
| 3450 | |
| 3451 invalid_constant ("Unrecognized detection result", symbol); | |
| 3452 return ((enum detection_result) 0); /* not reached */ | |
| 3453 } | |
| 778 | 3454 #endif /* 0 */ |
| 771 | 3455 |
| 3456 /* Set all detection results for a given detector to a specified value. */ | |
| 3457 void | |
| 3458 set_detection_results (struct detection_state *st, int detector, int given) | |
| 3459 { | |
| 3460 detector_category_dynarr *cats = | |
| 3461 Dynarr_at (all_coding_detectors, detector).cats; | |
| 3462 int i; | |
| 3463 | |
| 3464 for (i = 0; i < Dynarr_length (cats); i++) | |
| 3465 st->categories[Dynarr_at (cats, i).id] = given; | |
| 3466 } | |
| 428 | 3467 |
| 3468 static int | |
| 3469 acceptable_control_char_p (int c) | |
| 3470 { | |
| 3471 switch (c) | |
| 3472 { | |
| 3473 /* Allow and ignore control characters that you might | |
| 3474 reasonably see in a text file */ | |
| 3475 case '\r': | |
| 3476 case '\n': | |
| 3477 case '\t': | |
| 3478 case 7: /* bell */ | |
| 3479 case 8: /* backspace */ | |
| 3480 case 11: /* vertical tab */ | |
| 3481 case 12: /* form feed */ | |
| 3482 case 26: /* MS-DOS C-z junk */ | |
| 3483 case 31: /* '^_' -- for info */ | |
| 3484 return 1; | |
| 3485 default: | |
| 3486 return 0; | |
| 3487 } | |
| 3488 } | |
| 3489 | |
| 771 | 3490 #ifdef DEBUG_XEMACS |
| 3491 | |
| 3492 static UExtbyte | |
| 3493 hex_digit_to_char (int digit) | |
| 428 | 3494 { |
| 771 | 3495 if (digit < 10) |
| 3496 return digit + '0'; | |
| 3497 else | |
| 3498 return digit - 10 + 'A'; | |
| 428 | 3499 } |
| 3500 | |
| 771 | 3501 static void |
| 3502 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n) | |
| 428 | 3503 { |
| 3425 | 3504 Extbyte *ascii = alloca_array (Extbyte, n + 1); |
| 3505 Extbyte *hex = alloca_array (Extbyte, 3 * n + 1); | |
| 771 | 3506 int i; |
| 3413 | 3507 DECLARE_EISTRING (eistr_ascii); |
| 3508 DECLARE_EISTRING (eistr_hex); | |
| 771 | 3509 |
| 3510 for (i = 0; i < n; i++) | |
| 428 | 3511 { |
| 3425 | 3512 Extbyte c = src[i]; |
| 771 | 3513 if (c < 0x20) |
| 3514 ascii[i] = '.'; | |
| 428 | 3515 else |
| 771 | 3516 ascii[i] = c; |
| 3517 hex[3 * i] = hex_digit_to_char (c >> 4); | |
| 3518 hex[3 * i + 1] = hex_digit_to_char (c & 0xF); | |
| 3519 hex[3 * i + 2] = ' '; | |
| 428 | 3520 } |
| 771 | 3521 ascii[i] = '\0'; |
| 3522 hex[3 * i - 1] = '\0'; | |
| 3413 | 3523 |
| 3524 eicpy_ext(eistr_hex, hex, Qbinary); | |
| 3525 eicpy_ext(eistr_ascii, ascii, Qbinary); | |
| 3526 | |
| 3425 | 3527 stderr_out ("%s %s", eidata(eistr_ascii), eidata(eistr_hex)); |
| 428 | 3528 } |
| 3529 | |
| 771 | 3530 #endif /* DEBUG_XEMACS */ |
| 3531 | |
| 3532 /* Attempt to determine the encoding of the given text. Before calling | |
| 3533 this function for the first time, you must zero out the detection state. | |
| 428 | 3534 |
| 3535 Returns: | |
| 3536 | |
| 771 | 3537 0 == keep going |
| 3538 1 == stop | |
| 428 | 3539 */ |
| 3540 | |
| 3541 static int | |
| 771 | 3542 detect_coding_type (struct detection_state *st, const UExtbyte *src, |
| 3543 Bytecount n) | |
| 428 | 3544 { |
| 771 | 3545 Bytecount n2 = n; |
| 3546 const UExtbyte *src2 = src; | |
| 3547 int i; | |
| 3548 | |
| 3549 #ifdef DEBUG_XEMACS | |
| 3550 if (!NILP (Vdebug_coding_detection)) | |
| 3551 { | |
| 3552 int bytes = min (16, n); | |
| 3553 stderr_out ("detect_coding_type: processing %ld bytes\n", n); | |
| 3554 stderr_out ("First %d: ", bytes); | |
| 3555 output_bytes_in_ascii_and_hex (src, bytes); | |
| 3556 stderr_out ("\nLast %d: ", bytes); | |
| 3557 output_bytes_in_ascii_and_hex (src + n - bytes, bytes); | |
| 3558 stderr_out ("\n"); | |
| 3559 } | |
| 3560 #endif /* DEBUG_XEMACS */ | |
| 428 | 3561 if (!st->seen_non_ascii) |
| 3562 { | |
| 771 | 3563 for (; n2; n2--, src2++) |
| 428 | 3564 { |
| 771 | 3565 UExtbyte c = *src2; |
| 428 | 3566 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80) |
| 3567 { | |
| 3568 st->seen_non_ascii = 1; | |
| 3569 break; | |
| 3570 } | |
| 3571 } | |
| 3572 } | |
| 3573 | |
| 771 | 3574 for (i = 0; i < coding_detector_count; i++) |
| 3575 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n); | |
| 3576 | |
| 3577 st->bytes_seen += n; | |
| 3578 | |
| 3579 #ifdef DEBUG_XEMACS | |
| 3580 if (!NILP (Vdebug_coding_detection)) | |
| 3581 { | |
| 3582 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii); | |
| 1494 | 3583 if (coding_detector_category_count <= 0) |
| 3584 stderr_out ("found %d detector categories\n", | |
| 3585 coding_detector_category_count); | |
| 771 | 3586 for (i = 0; i < coding_detector_category_count; i++) |
| 3587 stderr_out_lisp | |
| 3588 ("%s: %s\n", | |
| 3589 2, | |
| 3590 coding_category_id_to_symbol (i), | |
| 3591 detection_result_number_to_symbol ((enum detection_result) | |
| 3592 st->categories[i])); | |
| 3593 } | |
| 3594 #endif /* DEBUG_XEMACS */ | |
| 3595 | |
| 3596 { | |
| 3597 int not_unlikely = 0; | |
| 3598 int retval; | |
| 3599 | |
| 3600 for (i = 0; i < coding_detector_category_count; i++) | |
| 3601 if (st->categories[i] >= 0) | |
| 3602 not_unlikely++; | |
| 3603 | |
| 3604 retval = (not_unlikely <= 1 | |
| 3605 #if 0 /* this is bogus */ | |
| 3606 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION | |
| 428 | 3607 #endif |
| 771 | 3608 ); |
| 3609 | |
| 3610 #ifdef DEBUG_XEMACS | |
| 3611 if (!NILP (Vdebug_coding_detection)) | |
| 3612 stderr_out ("detect_coding_type: returning %d (%s)\n", | |
| 3613 retval, retval ? "stop" : "keep going"); | |
| 3614 #endif /* DEBUG_XEMACS */ | |
| 3615 | |
| 3616 return retval; | |
| 428 | 3617 } |
| 3618 } | |
| 3619 | |
| 3620 static Lisp_Object | |
| 771 | 3621 detected_coding_system (struct detection_state *st) |
| 428 | 3622 { |
| 771 | 3623 int i; |
| 3624 int even = 1; | |
| 3625 | |
| 3626 if (st->seen_non_ascii) | |
| 3627 { | |
| 3628 for (i = 0; i < coding_detector_category_count; i++) | |
| 3629 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY) | |
| 3630 { | |
| 3631 even = 0; | |
| 3632 break; | |
| 3633 } | |
| 3634 } | |
| 3635 | |
| 3636 /* #### Here we are ignoring the results of detection when it's all | |
| 3637 ASCII. This is obviously a bad thing. But we need to fix up the | |
| 3638 existing detection methods somewhat before we can switch. */ | |
| 3639 if (even) | |
| 428 | 3640 { |
| 3641 /* If the file was entirely or basically ASCII, use the | |
| 3642 default value of `buffer-file-coding-system'. */ | |
| 3643 Lisp_Object retval = | |
| 3644 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system; | |
| 3645 if (!NILP (retval)) | |
| 3646 { | |
| 771 | 3647 retval = find_coding_system_for_text_file (retval, 0); |
| 428 | 3648 if (NILP (retval)) |
| 3649 { | |
| 3650 warn_when_safe | |
| 3651 (Qbad_variable, Qwarning, | |
| 3652 "Invalid `default-buffer-file-coding-system', set to nil"); | |
| 3653 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil; | |
| 3654 } | |
| 3655 } | |
| 3656 if (NILP (retval)) | |
| 4100 | 3657 retval = Fget_coding_system (Qbinary); |
| 428 | 3658 return retval; |
| 3659 } | |
| 3660 else | |
| 3661 { | |
| 771 | 3662 int likelihood; |
| 3663 Lisp_Object retval = Qnil; | |
| 3664 | |
| 3665 /* Look through the coding categories first by likelihood and then by | |
| 3666 priority and find the first one that is allowed. */ | |
| 3667 | |
| 3668 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--) | |
| 428 | 3669 { |
| 771 | 3670 for (i = 0; i < coding_detector_category_count; i++) |
| 3671 { | |
| 3672 int cat = coding_category_by_priority[i]; | |
| 3673 if (st->categories[cat] == likelihood && | |
| 3674 !NILP (coding_category_system[cat])) | |
| 3675 { | |
| 3676 retval = (get_coding_system_for_text_file | |
| 3677 (coding_category_system[cat], 0)); | |
| 3678 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY) | |
| 3679 warn_when_safe_lispobj | |
| 3680 (intern ("detection"), | |
| 793 | 3681 Qwarning, |
| 771 | 3682 emacs_sprintf_string_lisp |
| 3683 ( | |
| 3684 "Detected coding %s is unlikely to be correct (likelihood == `%s')", | |
| 3685 Qnil, 2, XCODING_SYSTEM_NAME (retval), | |
| 3686 detection_result_number_to_symbol | |
| 3687 ((enum detection_result) likelihood))); | |
| 3688 return retval; | |
| 3689 } | |
| 3690 } | |
| 428 | 3691 } |
| 771 | 3692 |
| 3693 return Fget_coding_system (Qraw_text); | |
| 428 | 3694 } |
| 3695 } | |
| 3696 | |
| 1347 | 3697 /* Look for a coding system in the string (skipping over leading |
| 3698 blanks). If found, return it, otherwise nil. */ | |
| 3699 | |
| 3700 static Lisp_Object | |
| 2531 | 3701 snarf_coding_system (const UExtbyte *p, Bytecount len) |
| 1347 | 3702 { |
| 3703 Bytecount n; | |
| 2531 | 3704 UExtbyte *name; |
| 1347 | 3705 |
| 3706 while (*p == ' ' || *p == '\t') p++, len--; | |
| 3707 len = min (len, 1000); | |
| 3708 name = alloca_ibytes (len + 1); | |
| 3709 memcpy (name, p, len); | |
| 3710 name[len] = '\0'; | |
| 3711 | |
| 3712 /* Get coding system name */ | |
| 3713 /* Characters valid in a MIME charset name (rfc 1521), | |
| 3714 and in a Lisp symbol name. */ | |
| 3715 n = qxestrspn (name, | |
| 3716 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
| 3717 "abcdefghijklmnopqrstuvwxyz" | |
| 3718 "0123456789" | |
| 3719 "!$%&*+-.^_{|}~"); | |
| 3720 if (n > 0) | |
| 3721 { | |
| 3722 name[n] = '\0'; | |
| 2531 | 3723 /* This call to intern_int() is OK because we already verified that |
| 3724 there are only ASCII characters in the string */ | |
| 3725 return find_coding_system_for_text_file (intern_int ((Ibyte *) name), 0); | |
| 1347 | 3726 } |
| 3727 | |
| 3728 return Qnil; | |
| 3729 } | |
| 3730 | |
| 428 | 3731 /* Given a seekable read stream and potential coding system and EOL type |
| 3732 as specified, do any autodetection that is called for. If the | |
| 3733 coding system and/or EOL type are not `autodetect', they will be left | |
| 3734 alone; but this function will never return an autodetect coding system | |
| 3735 or EOL type. | |
| 3736 | |
| 3737 This function does not automatically fetch subsidiary coding systems; | |
| 3738 that should be unnecessary with the explicit eol-type argument. */ | |
| 3739 | |
| 3740 #define LENGTH(string_constant) (sizeof (string_constant) - 1) | |
| 3741 | |
| 771 | 3742 static Lisp_Object |
| 3743 unwind_free_detection_state (Lisp_Object opaque) | |
| 3744 { | |
| 3745 struct detection_state *st = | |
| 3746 (struct detection_state *) get_opaque_ptr (opaque); | |
| 3747 free_detection_state (st); | |
| 3748 free_opaque_ptr (opaque); | |
| 3749 return Qnil; | |
| 3750 } | |
| 3751 | |
| 1347 | 3752 /* #### This duplicates code in `find-coding-system-magic-cookie-in-file' |
| 3753 in files.el. Look into combining them. */ | |
| 3754 | |
| 771 | 3755 static Lisp_Object |
| 3756 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len) | |
| 428 | 3757 { |
| 771 | 3758 const UExtbyte *p; |
| 3759 const UExtbyte *scan_end; | |
| 2531 | 3760 Bytecount cookie_len; |
| 771 | 3761 |
| 3762 /* Look for initial "-*-"; mode line prefix */ | |
| 3763 for (p = data, | |
| 3764 scan_end = data + len - LENGTH ("-*-coding:?-*-"); | |
| 3765 p <= scan_end | |
| 3766 && *p != '\n' | |
| 3767 && *p != '\r'; | |
| 3768 p++) | |
| 3769 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3770 { | |
| 3771 const UExtbyte *local_vars_beg = p + 3; | |
| 3772 /* Look for final "-*-"; mode line suffix */ | |
| 3773 for (p = local_vars_beg, | |
| 3774 scan_end = data + len - LENGTH ("-*-"); | |
| 3775 p <= scan_end | |
| 428 | 3776 && *p != '\n' |
| 3777 && *p != '\r'; | |
| 771 | 3778 p++) |
| 3779 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3780 { | |
| 3781 const UExtbyte *suffix = p; | |
| 3782 /* Look for "coding:" */ | |
| 3783 for (p = local_vars_beg, | |
| 3784 scan_end = suffix - LENGTH ("coding:?"); | |
| 3785 p <= scan_end; | |
| 3786 p++) | |
| 3787 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0 | |
| 3788 && (p == local_vars_beg | |
| 3789 || (*(p-1) == ' ' || | |
| 3790 *(p-1) == '\t' || | |
| 3791 *(p-1) == ';'))) | |
| 3792 { | |
| 3793 p += LENGTH ("coding:"); | |
| 1347 | 3794 return snarf_coding_system (p, suffix - p); |
| 771 | 3795 break; |
| 3796 } | |
| 3797 break; | |
| 3798 } | |
| 3799 break; | |
| 3800 } | |
| 3801 | |
| 2531 | 3802 /* Look for ;;;###coding system */ |
| 3803 | |
| 3804 cookie_len = LENGTH (";;;###coding system: "); | |
| 3805 | |
| 3806 for (p = data, | |
| 3807 scan_end = data + len - cookie_len; | |
| 3808 p <= scan_end; | |
| 3809 p++) | |
| 1347 | 3810 { |
| 2531 | 3811 if (*p == ';' && !memcmp (p, ";;;###coding system: ", cookie_len)) |
| 3812 { | |
| 3813 const UExtbyte *suffix; | |
| 3814 | |
| 3815 p += cookie_len; | |
| 3816 suffix = p; | |
| 3817 while (suffix < scan_end && !isspace (*suffix)) | |
| 3818 suffix++; | |
| 3819 return snarf_coding_system (p, suffix - p); | |
| 3820 } | |
| 1347 | 3821 } |
| 3822 | |
| 3823 return Qnil; | |
| 771 | 3824 } |
| 3825 | |
| 3826 static Lisp_Object | |
| 3827 determine_real_coding_system (Lstream *stream) | |
| 3828 { | |
| 3829 struct detection_state *st = allocate_detection_state (); | |
| 3830 int depth = record_unwind_protect (unwind_free_detection_state, | |
| 3831 make_opaque_ptr (st)); | |
| 3832 UExtbyte buf[4096]; | |
| 3833 Bytecount nread = Lstream_read (stream, buf, sizeof (buf)); | |
| 3834 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread); | |
| 3835 | |
| 3836 if (NILP (coding_system)) | |
| 3837 { | |
| 3838 while (1) | |
| 3839 { | |
| 3840 if (detect_coding_type (st, buf, nread)) | |
| 428 | 3841 break; |
| 771 | 3842 nread = Lstream_read (stream, buf, sizeof (buf)); |
| 3843 if (nread == 0) | |
| 3844 break; | |
| 428 | 3845 } |
| 771 | 3846 |
| 3847 coding_system = detected_coding_system (st); | |
| 428 | 3848 } |
| 3849 | |
| 3850 Lstream_rewind (stream); | |
| 771 | 3851 |
| 3852 unbind_to (depth); | |
| 3853 return coding_system; | |
| 3854 } | |
| 3855 | |
| 3856 static void | |
| 3857 undecided_init_coding_stream (struct coding_stream *str) | |
| 3858 { | |
| 3859 struct undecided_coding_stream *data = | |
| 3860 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3861 struct undecided_coding_system *csdata = | |
| 3862 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3863 | |
| 3864 data->actual = Qnil; | |
| 3865 | |
| 3866 if (str->direction == CODING_DECODE) | |
| 3867 { | |
| 3868 Lstream *lst = str->other_end; | |
| 3869 | |
| 3870 if ((lst->flags & LSTREAM_FL_READ) && | |
| 3871 Lstream_seekable_p (lst) && | |
| 3872 csdata->do_coding) | |
| 3873 /* We can determine the coding system now. */ | |
| 3874 data->actual = determine_real_coding_system (lst); | |
| 3875 } | |
| 1494 | 3876 |
| 3877 #ifdef DEBUG_XEMACS | |
| 3878 if (!NILP (Vdebug_coding_detection)) | |
| 3879 stderr_out_lisp ("detected coding system: %s\n", 1, data->actual); | |
| 3880 #endif /* DEBUG_XEMACS */ | |
| 771 | 3881 } |
| 3882 | |
| 3883 static void | |
| 3884 undecided_rewind_coding_stream (struct coding_stream *str) | |
| 3885 { | |
| 3886 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3887 } | |
| 3888 | |
| 3889 static void | |
| 3890 undecided_finalize_coding_stream (struct coding_stream *str) | |
| 3891 { | |
| 3892 struct undecided_coding_stream *data = | |
| 3893 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3894 | |
| 3895 chain_finalize_coding_stream_1 | |
| 3896 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3897 if (data->st) | |
| 3898 free_detection_state (data->st); | |
| 3899 } | |
| 3900 | |
| 3901 static Lisp_Object | |
| 3902 undecided_canonicalize (Lisp_Object codesys) | |
| 3903 { | |
| 3904 struct undecided_coding_system *csdata = | |
| 3905 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3906 if (!csdata->do_eol && !csdata->do_coding) | |
| 3907 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs; | |
| 3908 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs)) | |
| 3909 return Fget_coding_system (Qconvert_eol_autodetect); | |
| 3910 return codesys; | |
| 3911 } | |
| 3912 | |
| 3913 static Bytecount | |
| 3914 undecided_convert (struct coding_stream *str, const UExtbyte *src, | |
| 3915 unsigned_char_dynarr *dst, Bytecount n) | |
| 3916 { | |
| 3917 int first_time = 0; | |
| 3918 | |
| 3919 if (str->direction == CODING_DECODE) | |
| 3920 { | |
| 3921 /* At this point, we have only the following possibilities: | |
| 3922 | |
| 3923 do_eol && do_coding | |
| 3924 do_coding only | |
| 3925 do_eol only and a coding system was specified | |
| 3926 | |
| 3927 Other possibilities are removed during undecided_canonicalize. | |
| 3928 | |
| 3929 Therefore, our substreams are either | |
| 3930 | |
| 3931 lstream_coding -> lstream_dynarr, or | |
| 3932 lstream_coding -> lstream_eol -> lstream_dynarr. | |
| 3933 */ | |
| 3934 struct undecided_coding_system *csdata = | |
| 3935 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3936 struct undecided_coding_stream *data = | |
| 3937 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3938 | |
| 3939 if (str->eof) | |
| 3940 { | |
| 3941 /* Each will close the next. We need to close now because more | |
| 3942 data may be generated. */ | |
| 3943 if (data->c.initted) | |
| 3944 Lstream_close (XLSTREAM (data->c.lstreams[0])); | |
| 3945 return n; | |
| 3946 } | |
| 3947 | |
| 3948 if (!data->c.initted) | |
| 3949 { | |
| 3950 data->c.lstream_count = csdata->do_eol ? 3 : 2; | |
| 3951 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count); | |
| 3952 | |
| 3953 data->c.lstreams[data->c.lstream_count - 1] = | |
| 3954 make_dynarr_output_stream (dst); | |
| 3955 Lstream_set_buffering | |
| 3956 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3957 LSTREAM_UNBUFFERED, 0); | |
| 3958 if (csdata->do_eol) | |
| 3959 { | |
| 3960 data->c.lstreams[1] = | |
| 3961 make_coding_output_stream | |
| 3962 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3963 Fget_coding_system (Qconvert_eol_autodetect), | |
| 800 | 3964 CODING_DECODE, 0); |
| 771 | 3965 Lstream_set_buffering |
| 3966 (XLSTREAM (data->c.lstreams[1]), | |
| 3967 LSTREAM_UNBUFFERED, 0); | |
| 3968 } | |
| 3969 | |
| 3970 data->c.lstreams[0] = | |
| 3971 make_coding_output_stream | |
| 3972 (XLSTREAM (data->c.lstreams[1]), | |
| 3973 /* Substitute binary if we need to detect the encoding */ | |
| 3974 csdata->do_coding ? Qbinary : csdata->cs, | |
| 800 | 3975 CODING_DECODE, 0); |
| 771 | 3976 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]), |
| 3977 LSTREAM_UNBUFFERED, 0); | |
| 3978 | |
| 3979 first_time = 1; | |
| 3980 data->c.initted = 1; | |
| 3981 } | |
| 3982 | |
| 3983 /* If necessary, do encoding-detection now. We do this when we're a | |
| 3984 writing stream or a non-seekable reading stream, meaning that we | |
| 3985 can't just process the whole input, rewind, and start over. */ | |
| 3986 | |
| 3987 if (csdata->do_coding) | |
| 3988 { | |
| 3989 int actual_was_nil = NILP (data->actual); | |
| 3990 if (NILP (data->actual)) | |
| 3991 { | |
| 3992 if (!data->st) | |
| 3993 data->st = allocate_detection_state (); | |
| 3994 if (first_time) | |
| 3995 /* #### This is cheesy. What we really ought to do is buffer | |
| 3996 up a certain minimum amount of data to get a better result. | |
| 3997 */ | |
| 3998 data->actual = look_for_coding_system_magic_cookie (src, n); | |
| 3999 if (NILP (data->actual)) | |
| 4000 { | |
| 4001 /* #### This is cheesy. What we really ought to do is buffer | |
| 4002 up a certain minimum amount of data so as to get a less | |
| 4003 random result when doing subprocess detection. */ | |
| 4004 detect_coding_type (data->st, src, n); | |
| 4005 data->actual = detected_coding_system (data->st); | |
| 4100 | 4006 /* kludge to prevent infinite recursion */ |
| 4007 if (XCODING_SYSTEM(data->actual)->methods->enumtype == undecided_coding_system) | |
| 4008 data->actual = Fget_coding_system (Qbinary); | |
| 771 | 4009 } |
| 4010 } | |
| 4011 /* We need to set the detected coding system if we actually have | |
| 4012 such a coding system but didn't before. That is the case | |
| 4013 either when we just detected it in the previous code or when | |
| 4014 it was detected during undecided_init_coding_stream(). We | |
| 4015 can check for that using first_time. */ | |
| 4016 if (!NILP (data->actual) && (actual_was_nil || first_time)) | |
| 4017 { | |
| 4018 /* If the detected coding system doesn't allow for EOL | |
| 4019 autodetection, try to get the equivalent that does; | |
| 4020 otherwise, disable EOL detection (overriding whatever | |
| 4021 may already have been detected). */ | |
| 4022 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT) | |
| 4023 { | |
| 4024 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual))) | |
| 4025 data->actual = | |
| 4026 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual); | |
| 4027 else if (data->c.lstream_count == 3) | |
| 4028 set_coding_stream_coding_system | |
| 4029 (XLSTREAM (data->c.lstreams[1]), | |
| 4030 Fget_coding_system (Qidentity)); | |
| 4031 } | |
| 4032 set_coding_stream_coding_system | |
| 4033 (XLSTREAM (data->c.lstreams[0]), data->actual); | |
| 4034 } | |
| 4035 } | |
| 4036 | |
| 4037 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0) | |
| 4038 return -1; | |
| 4039 return n; | |
| 4040 } | |
| 4041 else | |
| 4042 return no_conversion_convert (str, src, dst, n); | |
| 4043 } | |
| 4044 | |
| 4045 static Lisp_Object | |
| 4046 undecided_canonicalize_after_coding (struct coding_stream *str) | |
| 4047 { | |
| 4048 struct undecided_coding_stream *data = | |
| 4049 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 4050 Lisp_Object ret, eolret; | |
| 4051 | |
| 4052 if (str->direction == CODING_ENCODE) | |
| 4053 return str->codesys; | |
| 4054 | |
| 4055 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
|
4056 return str->codesys; |
| 771 | 4057 |
| 4058 ret = coding_stream_canonicalize_after_coding | |
| 4059 (XLSTREAM (data->c.lstreams[0])); | |
| 4060 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
|
4061 ret = str->codesys; |
| 771 | 4062 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT) |
| 4063 return ret; | |
| 4064 eolret = coding_stream_canonicalize_after_coding | |
| 4065 (XLSTREAM (data->c.lstreams[1])); | |
| 4066 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol)) | |
| 4067 return ret; | |
| 4068 return | |
| 4069 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret, | |
| 4070 Qsubtype)); | |
| 4071 } | |
| 4072 | |
| 4073 | |
| 4074 /************************************************************************/ | |
| 4075 /* Lisp interface: Coding category functions and detection */ | |
| 4076 /************************************************************************/ | |
| 4077 | |
| 4078 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /* | |
| 4079 Return a list of all recognized coding categories. | |
| 4080 */ | |
| 4081 ()) | |
| 4082 { | |
| 4083 int i; | |
| 4084 Lisp_Object list = Qnil; | |
| 4085 | |
| 4086 for (i = 0; i < coding_detector_count; i++) | |
| 4087 { | |
| 4088 detector_category_dynarr *cats = | |
| 4089 Dynarr_at (all_coding_detectors, i).cats; | |
| 4090 int j; | |
| 4091 | |
| 4092 for (j = 0; j < Dynarr_length (cats); j++) | |
| 4093 list = Fcons (Dynarr_at (cats, j).sym, list); | |
| 4094 } | |
| 4095 | |
| 4096 return Fnreverse (list); | |
| 4097 } | |
| 4098 | |
| 4099 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /* | |
| 4100 Change the priority order of the coding categories. | |
| 4101 LIST should be list of coding categories, in descending order of | |
| 4102 priority. Unspecified coding categories will be lower in priority | |
| 4103 than all specified ones, in the same relative order they were in | |
| 4104 previously. | |
| 4105 */ | |
| 4106 (list)) | |
| 4107 { | |
| 4108 int *category_to_priority = | |
| 4109 alloca_array (int, coding_detector_category_count); | |
| 4110 int i, j; | |
| 4111 | |
| 4112 /* First generate a list that maps coding categories to priorities. */ | |
| 4113 | |
| 4114 for (i = 0; i < coding_detector_category_count; i++) | |
| 4115 category_to_priority[i] = -1; | |
| 4116 | |
| 4117 /* Highest priority comes from the specified list. */ | |
| 4118 i = 0; | |
| 2367 | 4119 { |
| 4120 EXTERNAL_LIST_LOOP_2 (elt, list) | |
| 4121 { | |
| 4122 int cat = coding_category_symbol_to_id (elt); | |
| 4123 | |
| 4124 if (category_to_priority[cat] >= 0) | |
| 4125 sferror ("Duplicate coding category in list", elt); | |
| 4126 category_to_priority[cat] = i++; | |
| 4127 } | |
| 4128 } | |
| 771 | 4129 |
| 4130 /* Now go through the existing categories by priority to retrieve | |
| 4131 the categories not yet specified and preserve their priority | |
| 4132 order. */ | |
| 4133 for (j = 0; j < coding_detector_category_count; j++) | |
| 4134 { | |
| 4135 int cat = coding_category_by_priority[j]; | |
| 4136 if (category_to_priority[cat] < 0) | |
| 4137 category_to_priority[cat] = i++; | |
| 4138 } | |
| 4139 | |
| 4140 /* Now we need to construct the inverse of the mapping we just | |
| 4141 constructed. */ | |
| 4142 | |
| 4143 for (i = 0; i < coding_detector_category_count; i++) | |
| 4144 coding_category_by_priority[category_to_priority[i]] = i; | |
| 4145 | |
| 4146 /* Phew! That was confusing. */ | |
| 4147 return Qnil; | |
| 4148 } | |
| 4149 | |
| 4150 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /* | |
| 4151 Return a list of coding categories in descending order of priority. | |
| 4152 */ | |
| 4153 ()) | |
| 4154 { | |
| 4155 int i; | |
| 4156 Lisp_Object list = Qnil; | |
| 4157 | |
| 4158 for (i = 0; i < coding_detector_category_count; i++) | |
| 4159 list = | |
| 4160 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]), | |
| 4161 list); | |
| 4162 return Fnreverse (list); | |
| 4163 } | |
| 4164 | |
| 4165 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /* | |
| 4166 Change the coding system associated with a coding category. | |
| 4167 */ | |
| 4168 (coding_category, coding_system)) | |
| 4169 { | |
| 4170 coding_category_system[coding_category_symbol_to_id (coding_category)] = | |
| 4171 Fget_coding_system (coding_system); | |
| 4172 return Qnil; | |
| 4173 } | |
| 4174 | |
| 4175 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /* | |
| 4176 Return the coding system associated with a coding category. | |
| 4177 */ | |
| 4178 (coding_category)) | |
| 4179 { | |
| 4180 Lisp_Object sys = | |
| 4181 coding_category_system[coding_category_symbol_to_id (coding_category)]; | |
| 4182 | |
| 4183 if (!NILP (sys)) | |
| 4184 return XCODING_SYSTEM_NAME (sys); | |
| 4185 return Qnil; | |
| 4186 } | |
| 4187 | |
| 800 | 4188 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will |
| 4189 read through to the end of STREAM, leaving it there but open. */ | |
| 4190 | |
| 771 | 4191 Lisp_Object |
| 4192 detect_coding_stream (Lisp_Object stream) | |
| 4193 { | |
| 4194 Lisp_Object val = Qnil; | |
| 4195 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4196 UExtbyte random_buffer[65536]; | |
| 4197 Lisp_Object binary_instream = | |
| 4198 make_coding_input_stream | |
| 4199 (XLSTREAM (stream), Qbinary, | |
| 814 | 4200 CODING_ENCODE, LSTREAM_FL_NO_CLOSE_OTHER); |
| 771 | 4201 Lisp_Object decstream = |
| 4202 make_coding_input_stream | |
| 4203 (XLSTREAM (binary_instream), | |
| 800 | 4204 Qundecided, CODING_DECODE, 0); |
| 771 | 4205 Lstream *decstr = XLSTREAM (decstream); |
| 4206 | |
| 4207 GCPRO3 (decstream, stream, binary_instream); | |
| 4208 /* Read and discard all data; detection happens as a side effect of this, | |
| 4209 and we examine what was detected afterwards. */ | |
| 4210 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0) | |
| 4211 ; | |
| 4212 | |
| 4213 val = coding_stream_detected_coding_system (decstr); | |
| 4214 Lstream_close (decstr); | |
| 4215 Lstream_delete (decstr); | |
| 4216 Lstream_delete (XLSTREAM (binary_instream)); | |
| 4217 UNGCPRO; | |
| 4218 return val; | |
| 428 | 4219 } |
| 4220 | |
| 4221 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /* | |
| 4222 Detect coding system of the text in the region between START and END. | |
| 444 | 4223 Return a list of possible coding systems ordered by priority. |
| 3025 | 4224 If only ASCII characters are found, return `undecided' or one of |
| 428 | 4225 its subsidiary coding systems according to a detected end-of-line |
| 4226 type. Optional arg BUFFER defaults to the current buffer. | |
| 4227 */ | |
| 4228 (start, end, buffer)) | |
| 4229 { | |
| 4230 Lisp_Object val = Qnil; | |
| 4231 struct buffer *buf = decode_buffer (buffer, 0); | |
| 665 | 4232 Charbpos b, e; |
| 771 | 4233 Lisp_Object lb_instream; |
| 428 | 4234 |
| 4235 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 4236 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 771 | 4237 |
| 4238 val = detect_coding_stream (lb_instream); | |
| 4239 Lstream_delete (XLSTREAM (lb_instream)); | |
| 428 | 4240 return val; |
| 4241 } | |
| 4242 | |
| 4243 | |
| 771 | 4244 |
| 4245 #ifdef DEBUG_XEMACS | |
| 4246 | |
| 428 | 4247 /************************************************************************/ |
| 771 | 4248 /* Internal methods */ |
| 4249 /************************************************************************/ | |
| 4250 | |
| 4251 /* Raw (internally-formatted) data. */ | |
| 4252 DEFINE_CODING_SYSTEM_TYPE (internal); | |
| 428 | 4253 |
| 665 | 4254 static Bytecount |
| 2286 | 4255 internal_convert (struct coding_stream *UNUSED (str), const UExtbyte *src, |
| 771 | 4256 unsigned_char_dynarr *dst, Bytecount n) |
| 4257 { | |
| 4258 Bytecount orign = n; | |
| 4259 Dynarr_add_many (dst, src, n); | |
| 4260 return orign; | |
| 4261 } | |
| 4262 | |
| 4263 #endif /* DEBUG_XEMACS */ | |
| 4264 | |
| 4265 | |
| 4266 | |
| 4267 #ifdef HAVE_ZLIB | |
| 4268 | |
| 4269 /************************************************************************/ | |
| 4270 /* Gzip methods */ | |
| 4271 /************************************************************************/ | |
| 4272 | |
| 4273 struct gzip_coding_system | |
| 428 | 4274 { |
| 771 | 4275 int level; /* 0 through 9, or -1 for default */ |
| 4276 }; | |
| 4277 | |
| 4278 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4279 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4280 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4281 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4282 | |
| 4283 struct gzip_coding_stream | |
| 428 | 4284 { |
| 771 | 4285 z_stream stream; |
| 4286 int stream_initted; | |
| 4287 int reached_eof; /* #### this should be handled by the caller, once we | |
| 4288 return LSTREAM_EOF */ | |
| 4289 }; | |
| 4290 | |
| 1204 | 4291 static const struct memory_description |
| 771 | 4292 gzip_coding_system_description[] = { |
| 4293 { XD_END } | |
| 4294 }; | |
| 4295 | |
| 1204 | 4296 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (gzip); |
| 4297 | |
| 771 | 4298 enum source_sink_type |
| 4299 gzip_conversion_end_type (Lisp_Object codesys) | |
| 4300 { | |
| 4301 return DECODES_BYTE_TO_BYTE; | |
| 428 | 4302 } |
| 4303 | |
| 4304 static void | |
| 771 | 4305 gzip_init (Lisp_Object codesys) |
| 4306 { | |
| 4307 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); | |
| 4308 data->level = -1; | |
| 4309 } | |
| 4310 | |
| 4311 static void | |
| 4312 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 428 | 4313 { |
| 771 | 4314 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip); |
| 4315 | |
| 826 | 4316 write_c_string (printcharfun, "("); |
| 771 | 4317 if (data->level == -1) |
| 826 | 4318 write_c_string (printcharfun, "default"); |
| 771 | 4319 else |
| 4320 print_internal (make_int (data->level), printcharfun, 0); | |
| 826 | 4321 write_c_string (printcharfun, ")"); |
| 428 | 4322 } |
| 4323 | |
| 4324 static int | |
| 771 | 4325 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 428 | 4326 { |
| 771 | 4327 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); |
| 4328 | |
| 4329 if (EQ (key, Qlevel)) | |
| 428 | 4330 { |
| 771 | 4331 if (EQ (value, Qdefault)) |
| 4332 data->level = -1; | |
| 4333 else | |
| 428 | 4334 { |
| 771 | 4335 CHECK_INT (value); |
| 4336 check_int_range (XINT (value), 0, 9); | |
| 4337 data->level = XINT (value); | |
| 428 | 4338 } |
| 4339 } | |
| 4340 else | |
| 771 | 4341 return 0; |
| 4342 return 1; | |
| 428 | 4343 } |
| 4344 | |
| 4345 static Lisp_Object | |
| 771 | 4346 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop) |
| 428 | 4347 { |
| 771 | 4348 struct gzip_coding_system *data = |
| 4349 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip); | |
| 4350 | |
| 4351 if (EQ (prop, Qlevel)) | |
| 428 | 4352 { |
| 771 | 4353 if (data->level == -1) |
| 4354 return Qdefault; | |
| 4355 return make_int (data->level); | |
| 428 | 4356 } |
| 771 | 4357 |
| 4358 return Qunbound; | |
| 428 | 4359 } |
| 4360 | |
| 4361 static void | |
| 771 | 4362 gzip_init_coding_stream (struct coding_stream *str) |
| 428 | 4363 { |
| 771 | 4364 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4365 if (data->stream_initted) | |
| 428 | 4366 { |
| 771 | 4367 if (str->direction == CODING_DECODE) |
| 4368 inflateEnd (&data->stream); | |
| 4369 else | |
| 4370 deflateEnd (&data->stream); | |
| 4371 data->stream_initted = 0; | |
| 428 | 4372 } |
| 771 | 4373 data->reached_eof = 0; |
| 428 | 4374 } |
| 4375 | |
| 4376 static void | |
| 771 | 4377 gzip_rewind_coding_stream (struct coding_stream *str) |
| 428 | 4378 { |
| 771 | 4379 gzip_init_coding_stream (str); |
| 428 | 4380 } |
| 4381 | |
| 771 | 4382 static Bytecount |
| 4383 gzip_convert (struct coding_stream *str, | |
| 4384 const UExtbyte *src, | |
| 4385 unsigned_char_dynarr *dst, Bytecount n) | |
| 428 | 4386 { |
| 771 | 4387 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4388 int zerr; | |
| 4389 if (str->direction == CODING_DECODE) | |
| 428 | 4390 { |
| 771 | 4391 if (data->reached_eof) |
| 4392 return n; /* eat the data */ | |
| 4393 | |
| 4394 if (!data->stream_initted) | |
| 428 | 4395 { |
| 771 | 4396 xzero (data->stream); |
| 4397 if (inflateInit (&data->stream) != Z_OK) | |
| 4398 return LSTREAM_ERROR; | |
| 4399 data->stream_initted = 1; | |
| 428 | 4400 } |
| 771 | 4401 |
| 4402 data->stream.next_in = (Bytef *) src; | |
| 4403 data->stream.avail_in = n; | |
| 4404 | |
| 4405 /* Normally we stop when we've fed all data to the decompressor; but | |
| 4406 if we're at the end of the input, and the decompressor hasn't | |
| 4407 reported EOF, we need to keep going, as there might be more output | |
| 4408 to generate. Z_OK from the decompressor means input was processed | |
| 4409 or output was generated; if neither, we break out of the loop. | |
| 4410 Other return values are: | |
| 4411 | |
| 4412 Z_STREAM_END EOF from decompressor | |
| 4413 Z_DATA_ERROR Corrupted data | |
| 4414 Z_BUF_ERROR No progress possible (this should happen if | |
| 4415 we try to feed it an incomplete file) | |
| 4416 Z_MEM_ERROR Out of memory | |
| 4417 Z_STREAM_ERROR (should never happen) | |
| 4418 Z_NEED_DICT (#### when will this happen?) | |
| 4419 */ | |
| 4420 while (data->stream.avail_in > 0 || str->eof) | |
| 4421 { | |
| 4422 /* Reserve an output buffer of the same size as the input buffer; | |
| 4423 if that's not enough, we keep reserving the same size. */ | |
| 4424 Bytecount reserved = n; | |
| 4425 Dynarr_add_many (dst, 0, reserved); | |
| 4426 /* Careful here! Don't retrieve the pointer until after | |
| 4427 reserving the space, or it might be bogus */ | |
| 4428 data->stream.next_out = | |
| 4429 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4430 data->stream.avail_out = reserved; | |
| 4431 zerr = inflate (&data->stream, Z_NO_FLUSH); | |
| 4432 /* Lop off the unused portion */ | |
| 4433 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4434 if (zerr != Z_OK) | |
| 4435 break; | |
| 4436 } | |
| 4437 | |
| 4438 if (zerr == Z_STREAM_END) | |
| 4439 data->reached_eof = 1; | |
| 4440 | |
| 4441 if ((Bytecount) data->stream.avail_in < n) | |
| 4442 return n - data->stream.avail_in; | |
| 4443 | |
| 4444 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4445 return 0; | |
| 4446 | |
| 4447 return LSTREAM_ERROR; | |
| 428 | 4448 } |
| 4449 else | |
| 4450 { | |
| 771 | 4451 if (!data->stream_initted) |
| 4452 { | |
| 4453 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys); | |
| 4454 xzero (data->stream); | |
| 4455 if (deflateInit (&data->stream, | |
| 4456 level == -1 ? Z_DEFAULT_COMPRESSION : level) != | |
| 4457 Z_OK) | |
| 4458 return LSTREAM_ERROR; | |
| 4459 data->stream_initted = 1; | |
| 428 | 4460 } |
| 771 | 4461 |
| 4462 data->stream.next_in = (Bytef *) src; | |
| 4463 data->stream.avail_in = n; | |
| 4464 | |
| 4465 /* Normally we stop when we've fed all data to the compressor; but if | |
| 4466 we're at the end of the input, and the compressor hasn't reported | |
| 4467 EOF, we need to keep going, as there might be more output to | |
| 4468 generate. (To signal EOF on our end, we set the FLUSH parameter | |
| 4469 to Z_FINISH; when all data is output, Z_STREAM_END will be | |
| 4470 returned.) Z_OK from the compressor means input was processed or | |
| 4471 output was generated; if neither, we break out of the loop. Other | |
| 4472 return values are: | |
| 4473 | |
| 4474 Z_STREAM_END EOF from compressor | |
| 4475 Z_BUF_ERROR No progress possible (should never happen) | |
| 4476 Z_STREAM_ERROR (should never happen) | |
| 4477 */ | |
| 4478 while (data->stream.avail_in > 0 || str->eof) | |
| 4479 { | |
| 4480 /* Reserve an output buffer of the same size as the input buffer; | |
| 4481 if that's not enough, we keep reserving the same size. */ | |
| 4482 Bytecount reserved = n; | |
| 4483 Dynarr_add_many (dst, 0, reserved); | |
| 4484 /* Careful here! Don't retrieve the pointer until after | |
| 4485 reserving the space, or it might be bogus */ | |
| 4486 data->stream.next_out = | |
| 4487 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4488 data->stream.avail_out = reserved; | |
| 4489 zerr = | |
| 4490 deflate (&data->stream, | |
| 4491 str->eof ? Z_FINISH : Z_NO_FLUSH); | |
| 4492 /* Lop off the unused portion */ | |
| 4493 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4494 if (zerr != Z_OK) | |
| 4495 break; | |
| 4496 } | |
| 4497 | |
| 4498 if ((Bytecount) data->stream.avail_in < n) | |
| 4499 return n - data->stream.avail_in; | |
| 4500 | |
| 4501 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4502 return 0; | |
| 4503 | |
| 4504 return LSTREAM_ERROR; | |
| 428 | 4505 } |
| 4506 } | |
| 4507 | |
| 771 | 4508 #endif /* HAVE_ZLIB */ |
| 428 | 4509 |
| 4510 | |
| 4511 /************************************************************************/ | |
| 4512 /* Initialization */ | |
| 4513 /************************************************************************/ | |
| 4514 | |
| 4515 void | |
| 4516 syms_of_file_coding (void) | |
| 4517 { | |
| 442 | 4518 INIT_LRECORD_IMPLEMENTATION (coding_system); |
| 4519 | |
| 771 | 4520 DEFSUBR (Fvalid_coding_system_type_p); |
| 4521 DEFSUBR (Fcoding_system_type_list); | |
| 428 | 4522 DEFSUBR (Fcoding_system_p); |
| 4303 | 4523 DEFSUBR (Fautoload_coding_system); |
| 428 | 4524 DEFSUBR (Ffind_coding_system); |
| 4525 DEFSUBR (Fget_coding_system); | |
| 4526 DEFSUBR (Fcoding_system_list); | |
| 4527 DEFSUBR (Fcoding_system_name); | |
|
4690
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Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4528 DEFSUBR (Fmake_coding_system_internal); |
| 428 | 4529 DEFSUBR (Fcopy_coding_system); |
| 440 | 4530 DEFSUBR (Fcoding_system_canonical_name_p); |
| 4531 DEFSUBR (Fcoding_system_alias_p); | |
| 4532 DEFSUBR (Fcoding_system_aliasee); | |
| 428 | 4533 DEFSUBR (Fdefine_coding_system_alias); |
| 4534 DEFSUBR (Fsubsidiary_coding_system); | |
| 771 | 4535 DEFSUBR (Fcoding_system_base); |
| 4536 DEFSUBR (Fcoding_system_used_for_io); | |
| 428 | 4537 |
| 4538 DEFSUBR (Fcoding_system_type); | |
| 771 | 4539 DEFSUBR (Fcoding_system_description); |
| 428 | 4540 DEFSUBR (Fcoding_system_property); |
| 4541 | |
| 4542 DEFSUBR (Fcoding_category_list); | |
| 4543 DEFSUBR (Fset_coding_priority_list); | |
| 4544 DEFSUBR (Fcoding_priority_list); | |
| 4545 DEFSUBR (Fset_coding_category_system); | |
| 4546 DEFSUBR (Fcoding_category_system); | |
| 4547 | |
| 4548 DEFSUBR (Fdetect_coding_region); | |
| 4549 DEFSUBR (Fdecode_coding_region); | |
| 4550 DEFSUBR (Fencode_coding_region); | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4551 DEFSUBR (Fquery_coding_region); |
| 563 | 4552 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp); |
| 4553 DEFSYMBOL (Qno_conversion); | |
| 771 | 4554 DEFSYMBOL (Qconvert_eol); |
| 4555 DEFSYMBOL (Qconvert_eol_autodetect); | |
| 4556 DEFSYMBOL (Qconvert_eol_lf); | |
| 4557 DEFSYMBOL (Qconvert_eol_cr); | |
| 4558 DEFSYMBOL (Qconvert_eol_crlf); | |
| 563 | 4559 DEFSYMBOL (Qraw_text); |
| 771 | 4560 |
| 563 | 4561 DEFSYMBOL (Qmnemonic); |
| 4562 DEFSYMBOL (Qeol_type); | |
| 4563 DEFSYMBOL (Qpost_read_conversion); | |
| 4564 DEFSYMBOL (Qpre_write_conversion); | |
| 4565 | |
| 771 | 4566 DEFSYMBOL (Qtranslation_table_for_decode); |
| 4567 DEFSYMBOL (Qtranslation_table_for_encode); | |
| 4568 DEFSYMBOL (Qsafe_chars); | |
| 4569 DEFSYMBOL (Qsafe_charsets); | |
| 4570 DEFSYMBOL (Qmime_charset); | |
| 4571 DEFSYMBOL (Qvalid_codes); | |
| 4572 | |
| 563 | 4573 DEFSYMBOL (Qcr); |
| 4574 DEFSYMBOL (Qlf); | |
| 4575 DEFSYMBOL (Qcrlf); | |
| 4576 DEFSYMBOL (Qeol_cr); | |
| 4577 DEFSYMBOL (Qeol_lf); | |
| 4578 DEFSYMBOL (Qeol_crlf); | |
| 4579 DEFSYMBOL (Qencode); | |
| 4580 DEFSYMBOL (Qdecode); | |
| 428 | 4581 |
| 771 | 4582 DEFSYMBOL (Qnear_certainty); |
| 4583 DEFSYMBOL (Qquite_probable); | |
| 4584 DEFSYMBOL (Qsomewhat_likely); | |
| 1494 | 4585 DEFSYMBOL (Qslightly_likely); |
| 771 | 4586 DEFSYMBOL (Qas_likely_as_unlikely); |
| 4587 DEFSYMBOL (Qsomewhat_unlikely); | |
| 4588 DEFSYMBOL (Qquite_improbable); | |
| 4589 DEFSYMBOL (Qnearly_impossible); | |
| 4590 | |
| 4591 DEFSYMBOL (Qdo_eol); | |
| 4592 DEFSYMBOL (Qdo_coding); | |
| 4593 | |
| 4594 DEFSYMBOL (Qcanonicalize_after_coding); | |
| 4595 | |
| 4303 | 4596 DEFSYMBOL (Qposix_charset_to_coding_system_hash); |
| 4597 | |
| 771 | 4598 DEFSYMBOL (Qescape_quoted); |
| 4599 | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4600 DEFSYMBOL (Qquery_coding_warning_face); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4601 DEFSYMBOL (Qaliases); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4602 DEFSYMBOL (Qcharset_skip_chars_string); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4603 |
| 771 | 4604 #ifdef HAVE_ZLIB |
| 4605 DEFSYMBOL (Qgzip); | |
| 4606 #endif | |
| 4607 | |
| 428 | 4608 } |
| 4609 | |
| 4610 void | |
| 4611 lstream_type_create_file_coding (void) | |
| 4612 { | |
| 771 | 4613 LSTREAM_HAS_METHOD (coding, reader); |
| 4614 LSTREAM_HAS_METHOD (coding, writer); | |
| 4615 LSTREAM_HAS_METHOD (coding, rewinder); | |
| 4616 LSTREAM_HAS_METHOD (coding, seekable_p); | |
| 4617 LSTREAM_HAS_METHOD (coding, marker); | |
| 4618 LSTREAM_HAS_METHOD (coding, flusher); | |
| 4619 LSTREAM_HAS_METHOD (coding, closer); | |
| 4620 LSTREAM_HAS_METHOD (coding, finalizer); | |
| 4621 } | |
| 4622 | |
| 4623 void | |
| 4624 coding_system_type_create (void) | |
| 4625 { | |
| 4626 int i; | |
| 4627 | |
| 4628 staticpro (&Vcoding_system_hash_table); | |
| 4629 Vcoding_system_hash_table = | |
| 4630 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ); | |
| 4631 | |
| 4632 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry); | |
| 2367 | 4633 dump_add_root_block_ptr (&the_coding_system_type_entry_dynarr, |
| 771 | 4634 &csted_description); |
| 4635 | |
| 4636 Vcoding_system_type_list = Qnil; | |
| 4637 staticpro (&Vcoding_system_type_list); | |
| 4638 | |
| 4639 /* Initialize to something reasonable ... */ | |
| 4640 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++) | |
| 4641 { | |
| 4642 coding_category_system[i] = Qnil; | |
| 1204 | 4643 dump_add_root_lisp_object (&coding_category_system[i]); |
| 771 | 4644 coding_category_by_priority[i] = i; |
| 4645 } | |
| 4646 | |
| 4647 dump_add_opaque (coding_category_by_priority, | |
| 4648 sizeof (coding_category_by_priority)); | |
| 4649 | |
| 4650 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector); | |
| 2367 | 4651 dump_add_root_block_ptr (&all_coding_detectors, |
| 771 | 4652 &detector_dynarr_description); |
| 4653 | |
| 4654 dump_add_opaque_int (&coding_system_tick); | |
| 4655 dump_add_opaque_int (&coding_detector_count); | |
| 4656 dump_add_opaque_int (&coding_detector_category_count); | |
| 4657 | |
| 4658 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion, | |
| 4659 "no-conversion-coding-system-p"); | |
| 4660 CODING_SYSTEM_HAS_METHOD (no_conversion, convert); | |
| 4661 | |
| 4662 INITIALIZE_DETECTOR (no_conversion); | |
| 4663 DETECTOR_HAS_METHOD (no_conversion, detect); | |
| 4664 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 4665 | |
| 4666 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol, | |
| 4667 "convert-eol-coding-system-p"); | |
| 4668 CODING_SYSTEM_HAS_METHOD (convert_eol, print); | |
| 4669 CODING_SYSTEM_HAS_METHOD (convert_eol, convert); | |
| 4670 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop); | |
| 4671 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop); | |
| 4672 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type); | |
| 4673 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding); | |
| 4674 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream); | |
| 4675 | |
| 4676 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided, | |
| 4677 "undecided-coding-system-p"); | |
| 4678 CODING_SYSTEM_HAS_METHOD (undecided, init); | |
| 4679 CODING_SYSTEM_HAS_METHOD (undecided, mark); | |
| 4680 CODING_SYSTEM_HAS_METHOD (undecided, print); | |
| 4681 CODING_SYSTEM_HAS_METHOD (undecided, convert); | |
| 4682 CODING_SYSTEM_HAS_METHOD (undecided, putprop); | |
| 4683 CODING_SYSTEM_HAS_METHOD (undecided, getprop); | |
| 4684 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream); | |
| 4685 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream); | |
| 4686 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream); | |
| 4687 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream); | |
| 4688 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize); | |
| 4689 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding); | |
| 4690 | |
| 4691 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p"); | |
| 4692 | |
| 4693 CODING_SYSTEM_HAS_METHOD (chain, print); | |
| 4694 CODING_SYSTEM_HAS_METHOD (chain, canonicalize); | |
| 4695 CODING_SYSTEM_HAS_METHOD (chain, init); | |
| 4696 CODING_SYSTEM_HAS_METHOD (chain, mark); | |
| 4697 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream); | |
| 4698 CODING_SYSTEM_HAS_METHOD (chain, convert); | |
| 4699 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream); | |
| 4700 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream); | |
| 4701 CODING_SYSTEM_HAS_METHOD (chain, finalize); | |
| 4702 CODING_SYSTEM_HAS_METHOD (chain, putprop); | |
| 4703 CODING_SYSTEM_HAS_METHOD (chain, getprop); | |
| 4704 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type); | |
| 4705 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding); | |
| 4706 | |
| 4707 #ifdef DEBUG_XEMACS | |
| 4708 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p"); | |
| 4709 CODING_SYSTEM_HAS_METHOD (internal, convert); | |
| 4710 #endif | |
| 4711 | |
| 4712 #ifdef HAVE_ZLIB | |
| 4713 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p"); | |
| 4714 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type); | |
| 4715 CODING_SYSTEM_HAS_METHOD (gzip, convert); | |
| 4716 CODING_SYSTEM_HAS_METHOD (gzip, init); | |
| 4717 CODING_SYSTEM_HAS_METHOD (gzip, print); | |
| 4718 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream); | |
| 4719 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream); | |
| 4720 CODING_SYSTEM_HAS_METHOD (gzip, putprop); | |
| 4721 CODING_SYSTEM_HAS_METHOD (gzip, getprop); | |
| 4722 #endif | |
| 4723 } | |
| 4724 | |
| 4725 void | |
| 4726 reinit_coding_system_type_create (void) | |
| 4727 { | |
| 4728 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion); | |
| 4729 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol); | |
| 4730 REINITIALIZE_CODING_SYSTEM_TYPE (undecided); | |
| 4731 REINITIALIZE_CODING_SYSTEM_TYPE (chain); | |
| 4732 #if 0 | |
| 4733 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper); | |
| 4734 #endif /* 0 */ | |
| 4735 #ifdef DEBUG_XEMACS | |
| 4736 REINITIALIZE_CODING_SYSTEM_TYPE (internal); | |
| 4737 #endif | |
| 4738 #ifdef HAVE_ZLIB | |
| 4739 REINITIALIZE_CODING_SYSTEM_TYPE (gzip); | |
| 4740 #endif | |
| 4741 } | |
| 4742 | |
| 4743 void | |
| 4744 reinit_vars_of_file_coding (void) | |
| 4745 { | |
| 428 | 4746 } |
| 4747 | |
| 4748 void | |
| 4749 vars_of_file_coding (void) | |
| 4750 { | |
| 771 | 4751 /* We always have file-coding support */ |
| 428 | 4752 Fprovide (intern ("file-coding")); |
| 4753 | |
| 1347 | 4754 QScoding_system_cookie = build_string (";;;###coding system: "); |
| 4755 staticpro (&QScoding_system_cookie); | |
| 4756 | |
| 1242 | 4757 #ifdef HAVE_DEFAULT_EOL_DETECTION |
| 2297 | 4758 /* #### Find a more appropriate place for this comment. |
| 4759 WARNING: The existing categories are intimately tied to the function | |
| 1242 | 4760 `coding-system-category' in coding.el. If you change a category, or |
| 4761 change the layout of any coding system associated with a category, you | |
| 4762 need to check that function and make sure it's written properly. */ | |
| 4763 | |
| 4764 Fprovide (intern ("unix-default-eol-detection")); | |
| 4765 #endif | |
| 4766 | |
| 428 | 4767 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /* |
| 3142 | 4768 Default coding system used for TTY and X11 keyboard input. |
| 4769 Under X11, used only to interpet the character for a key event when that | |
| 4770 event has a KeySym of NoSymbol but does have an associated string keysym, | |
| 4771 something that's seen with input methods. | |
| 4772 | |
| 4773 If you need to set these things to different coding systems, call the | |
| 4774 function `set-console-tty-coding-system' for the TTY and use this variable | |
| 4775 for X11. | |
| 428 | 4776 */ ); |
| 4777 Vkeyboard_coding_system = Qnil; | |
| 4778 | |
| 4779 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /* | |
| 4780 Coding system used for TTY display output. | |
| 4781 Not used under a windowing system. | |
| 4782 */ ); | |
| 4783 Vterminal_coding_system = Qnil; | |
| 4784 | |
| 4785 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /* | |
| 440 | 4786 Overriding coding system used when reading from a file or process. |
| 4787 You should bind this variable with `let', but do not set it globally. | |
| 4788 If this is non-nil, it specifies the coding system that will be used | |
| 4789 to decode input on read operations, such as from a file or process. | |
| 4790 It overrides `buffer-file-coding-system-for-read', | |
| 428 | 4791 `insert-file-contents-pre-hook', etc. Use those variables instead of |
| 440 | 4792 this one for permanent changes to the environment. */ ); |
| 428 | 4793 Vcoding_system_for_read = Qnil; |
| 4794 | |
| 4795 DEFVAR_LISP ("coding-system-for-write", | |
| 4796 &Vcoding_system_for_write /* | |
| 440 | 4797 Overriding coding system used when writing to a file or process. |
| 4798 You should bind this variable with `let', but do not set it globally. | |
| 4799 If this is non-nil, it specifies the coding system that will be used | |
| 4800 to encode output for write operations, such as to a file or process. | |
| 4801 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc. | |
| 4802 Use those variables instead of this one for permanent changes to the | |
| 4803 environment. */ ); | |
| 428 | 4804 Vcoding_system_for_write = Qnil; |
| 4805 | |
| 4806 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /* | |
| 4807 Coding system used to convert pathnames when accessing files. | |
| 4808 */ ); | |
| 4809 Vfile_name_coding_system = Qnil; | |
| 4810 | |
| 4811 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /* | |
| 771 | 4812 Setting this has no effect. It is purely for FSF compatibility. |
| 428 | 4813 */ ); |
| 4814 enable_multibyte_characters = 1; | |
| 771 | 4815 |
| 4816 Vchain_canonicalize_hash_table = | |
| 4817 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL); | |
| 4818 staticpro (&Vchain_canonicalize_hash_table); | |
| 4819 | |
| 4820 #ifdef DEBUG_XEMACS | |
| 4821 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /* | |
| 4822 If non-nil, display debug information about detection operations in progress. | |
| 4823 Information is displayed on stderr. | |
| 4824 */ ); | |
| 4825 Vdebug_coding_detection = Qnil; | |
| 4826 #endif | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
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4647
diff
changeset
|
4827 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4828 #ifdef MULE |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4829 Vdefault_query_coding_region_chartab_cache |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4830 = 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
|
4831 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
|
4832 #endif |
| 428 | 4833 } |
| 4834 | |
| 2297 | 4835 /* #### reformat this for consistent appearance? */ |
| 4836 | |
| 428 | 4837 void |
| 4838 complex_vars_of_file_coding (void) | |
| 4839 { | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4840 Fmake_coding_system_internal |
| 771 | 4841 (Qconvert_eol_cr, Qconvert_eol, |
| 4842 build_msg_string ("Convert CR to LF"), | |
| 4843 nconc2 (list6 (Qdocumentation, | |
| 4844 build_msg_string ( | |
| 4845 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4846 "(used internally and under Unix to mark the end of a line)."), | |
| 4847 Qmnemonic, build_string ("CR->LF"), | |
| 4848 Qsubtype, Qcr), | |
| 4849 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4850 subsidiaries -- it needs the coding systems we're creating | |
| 4851 to do so! */ | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4852 list4 (Qeol_type, Qlf, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4853 Qsafe_charsets, Qt))); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4854 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4855 Fmake_coding_system_internal |
| 771 | 4856 (Qconvert_eol_lf, Qconvert_eol, |
| 4857 build_msg_string ("Convert LF to LF (do nothing)"), | |
| 4858 nconc2 (list6 (Qdocumentation, | |
| 4859 build_msg_string ( | |
| 4860 "Do nothing."), | |
| 4861 Qmnemonic, build_string ("LF->LF"), | |
| 4862 Qsubtype, Qlf), | |
| 4863 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4864 subsidiaries -- it needs the coding systems we're creating | |
| 4865 to do so! */ | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4866 list4 (Qeol_type, Qlf, |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4867 Qsafe_charsets, Qt))); |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4868 |
|
257b468bf2ca
Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4647
diff
changeset
|
4869 Fmake_coding_system_internal |
| 771 | 4870 (Qconvert_eol_crlf, Qconvert_eol, |
| 4871 build_msg_string ("Convert CRLF to LF"), | |
| 4872 nconc2 (list6 (Qdocumentation, | |
| 4873 build_msg_string ( | |
| 4874 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4875 "(used internally and under Unix to mark the end of a line)."), | |
| 4876 Qmnemonic, build_string ("CRLF->LF"), | |
| 4877 Qsubtype, Qcrlf), | |
|
4690
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|
4878 |
| 771 | 4879 /* VERY IMPORTANT! Tell make-coding-system not to generate |
| 4880 subsidiaries -- it needs the coding systems we're creating | |
| 4881 to do so! */ | |
|
4690
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|
4882 list4 (Qeol_type, Qlf, |
|
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Move the #'query-coding-region implementation to C.
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|
4883 Qsafe_charsets, Qt))); |
|
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|
4884 |
|
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Move the #'query-coding-region implementation to C.
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|
4885 Fmake_coding_system_internal |
| 771 | 4886 (Qconvert_eol_autodetect, Qconvert_eol, |
| 4887 build_msg_string ("Autodetect EOL type"), | |
| 4888 nconc2 (list6 (Qdocumentation, | |
| 4889 build_msg_string ( | |
| 4890 "Autodetect the end-of-line type."), | |
| 4891 Qmnemonic, build_string ("Auto-EOL"), | |
| 793 | 4892 Qsubtype, Qnil), |
| 771 | 4893 /* VERY IMPORTANT! Tell make-coding-system not to generate |
| 4894 subsidiaries -- it needs the coding systems we're creating | |
| 4895 to do so! */ | |
|
4690
257b468bf2ca
Move the #'query-coding-region implementation to C.
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|
4896 list4 (Qeol_type, Qlf, |
|
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Move the #'query-coding-region implementation to C.
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|
4897 Qsafe_charsets, Qt))); |
|
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|
4898 |
|
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Move the #'query-coding-region implementation to C.
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|
4899 Fmake_coding_system_internal |
| 771 | 4900 (Qundecided, Qundecided, |
| 4901 build_msg_string ("Undecided (auto-detect)"), | |
| 4902 nconc2 (list4 (Qdocumentation, | |
| 4903 build_msg_string | |
| 4904 ("Automatically detects the correct encoding."), | |
| 4905 Qmnemonic, build_string ("Auto")), | |
| 4906 list6 (Qdo_eol, Qt, Qdo_coding, Qt, | |
| 4907 /* We do EOL detection ourselves so we don't need to be | |
| 4908 wrapped in an EOL detector. (It doesn't actually hurt, | |
| 4909 though, I don't think.) */ | |
| 4910 Qeol_type, Qlf))); | |
| 4911 | |
|
4690
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|
4912 Fmake_coding_system_internal |
| 771 | 4913 (intern ("undecided-dos"), Qundecided, |
| 4914 build_msg_string ("Undecided (auto-detect) (CRLF)"), | |
| 4915 nconc2 (list4 (Qdocumentation, | |
| 4916 build_msg_string | |
| 4917 ("Automatically detects the correct encoding; EOL type of CRLF forced."), | |
| 4918 Qmnemonic, build_string ("Auto")), | |
| 4919 list4 (Qdo_coding, Qt, | |
| 4920 Qeol_type, Qcrlf))); | |
| 4921 | |
|
4690
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Move the #'query-coding-region implementation to C.
Aidan Kehoe <kehoea@parhasard.net>
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|
4922 Fmake_coding_system_internal |
| 771 | 4923 (intern ("undecided-unix"), Qundecided, |
| 4924 build_msg_string ("Undecided (auto-detect) (LF)"), | |
| 4925 nconc2 (list4 (Qdocumentation, | |
| 4926 build_msg_string | |
| 4927 ("Automatically detects the correct encoding; EOL type of LF forced."), | |
| 4928 Qmnemonic, build_string ("Auto")), | |
| 4929 list4 (Qdo_coding, Qt, | |
| 4930 Qeol_type, Qlf))); | |
| 4931 | |
|
4690
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Aidan Kehoe <kehoea@parhasard.net>
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|
4932 Fmake_coding_system_internal |
| 771 | 4933 (intern ("undecided-mac"), Qundecided, |
| 4934 build_msg_string ("Undecided (auto-detect) (CR)"), | |
| 4935 nconc2 (list4 (Qdocumentation, | |
| 4936 build_msg_string | |
| 4937 ("Automatically detects the correct encoding; EOL type of CR forced."), | |
| 4938 Qmnemonic, build_string ("Auto")), | |
| 4939 list4 (Qdo_coding, Qt, | |
| 4940 Qeol_type, Qcr))); | |
| 4941 | |
| 428 | 4942 /* 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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|
4943 Fmake_coding_system_internal |
| 428 | 4944 (Qraw_text, Qno_conversion, |
| 771 | 4945 build_msg_string ("Raw Text"), |
|
4690
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|
4946 nconc2 (list4 (Qdocumentation, |
|
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|
4947 build_msg_string ("Raw text converts only line-break " |
|
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|
4948 "codes, and acts otherwise like " |
|
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|
4949 "`binary'."), |
|
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|
4950 Qmnemonic, build_string ("Raw")), |
|
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|
4951 #ifdef MULE |
|
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|
4952 list2 (Qsafe_charsets, list3 (Vcharset_ascii, Vcharset_control_1, |
|
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|
4953 Vcharset_latin_iso8859_1)))); |
|
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|
4954 |
|
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|
4955 #else |
|
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|
4956 Qnil)); |
|
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|
4957 #endif |
|
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|
4958 |
|
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diff
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|
4959 Fmake_coding_system_internal |
| 428 | 4960 (Qbinary, Qno_conversion, |
| 771 | 4961 build_msg_string ("Binary"), |
|
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|
4962 nconc2 (list6 (Qdocumentation, |
|
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diff
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|
4963 build_msg_string ( |
| 771 | 4964 "This coding system is as close as it comes to doing no conversion.\n" |
| 4965 "On input, each byte is converted directly into the character\n" | |
| 4966 "with the corresponding code -- i.e. from the `ascii', `control-1',\n" | |
| 4967 "or `latin-1' character sets. On output, these characters are\n" | |
| 4968 "converted back to the corresponding bytes, and other characters\n" | |
| 4969 "are converted to the default character, i.e. `~'."), | |
|
4690
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|
4970 Qeol_type, Qlf, |
|
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Move the #'query-coding-region implementation to C.
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|
4971 Qmnemonic, build_string ("Binary")), |
|
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|
4972 #ifdef MULE |
|
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|
4973 list2 (Qsafe_charsets, list3 (Vcharset_ascii, Vcharset_control_1, |
|
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|
4974 Vcharset_latin_iso8859_1)))); |
|
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|
4975 |
|
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|
4976 #else |
|
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|
4977 Qnil)); |
|
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Move the #'query-coding-region implementation to C.
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|
4978 #endif |
| 428 | 4979 |
| 771 | 4980 /* Formerly aliased to raw-text! Completely bogus and not even the same |
| 4981 as FSF Emacs. */ | |
| 4982 Fdefine_coding_system_alias (Qno_conversion, Qbinary); | |
| 4983 Fdefine_coding_system_alias (intern ("no-conversion-unix"), | |
| 4984 intern ("raw-text-unix")); | |
| 4985 Fdefine_coding_system_alias (intern ("no-conversion-dos"), | |
| 4986 intern ("raw-text-dos")); | |
| 4987 Fdefine_coding_system_alias (intern ("no-conversion-mac"), | |
| 4988 intern ("raw-text-mac")); | |
| 4989 | |
| 1318 | 4990 /* These three below will get their defaults set correctly |
| 4991 in code-init.el. We init them now so we can handle stuff at dump | |
| 771 | 4992 time before we get to code-init.el. */ |
| 1318 | 4993 Fdefine_coding_system_alias (Qnative, Qbinary); |
| 440 | 4994 Fdefine_coding_system_alias (Qterminal, Qbinary); |
| 4995 Fdefine_coding_system_alias (Qkeyboard, Qbinary); | |
| 4996 | |
| 1318 | 4997 Fdefine_coding_system_alias (Qfile_name, Qnative); |
| 771 | 4998 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf); |
| 4999 | |
| 428 | 5000 /* Need this for bootstrapping */ |
| 771 | 5001 coding_category_system[detector_category_no_conversion] = |
| 428 | 5002 Fget_coding_system (Qraw_text); |
| 5003 } |