Mercurial > hg > xemacs-beta
annotate src/file-coding.c @ 5117:3742ea8250b5 ben-lisp-object ben-lisp-object-final-ws-year-2005
Checking in final CVS version of workspace 'ben-lisp-object'
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sat, 26 Dec 2009 00:20:27 -0600 |
| parents | facf3239ba30 |
| children | 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" |
| 81 | |
| 82 #ifdef HAVE_ZLIB | |
| 83 #include "zlib.h" | |
| 428 | 84 #endif |
| 85 | |
| 86 Lisp_Object Vkeyboard_coding_system; | |
| 87 Lisp_Object Vterminal_coding_system; | |
| 88 Lisp_Object Vcoding_system_for_read; | |
| 89 Lisp_Object Vcoding_system_for_write; | |
| 90 Lisp_Object Vfile_name_coding_system; | |
| 91 | |
| 771 | 92 #ifdef DEBUG_XEMACS |
| 93 Lisp_Object Vdebug_coding_detection; | |
| 440 | 94 #endif |
| 771 | 95 |
| 96 typedef struct coding_system_type_entry | |
| 97 { | |
| 98 struct coding_system_methods *meths; | |
| 99 } coding_system_type_entry; | |
| 100 | |
| 101 typedef struct | |
| 102 { | |
| 103 Dynarr_declare (coding_system_type_entry); | |
| 104 } coding_system_type_entry_dynarr; | |
| 105 | |
| 106 static coding_system_type_entry_dynarr *the_coding_system_type_entry_dynarr; | |
| 107 | |
| 1204 | 108 static const struct memory_description cste_description_1[] = { |
| 2551 | 109 { XD_BLOCK_PTR, offsetof (coding_system_type_entry, meths), 1, |
| 110 { &coding_system_methods_description } }, | |
| 771 | 111 { XD_END } |
| 112 }; | |
| 113 | |
| 1204 | 114 static const struct sized_memory_description cste_description = { |
| 771 | 115 sizeof (coding_system_type_entry), |
| 116 cste_description_1 | |
| 117 }; | |
| 118 | |
| 1204 | 119 static const struct memory_description csted_description_1[] = { |
| 771 | 120 XD_DYNARR_DESC (coding_system_type_entry_dynarr, &cste_description), |
| 428 | 121 { XD_END } |
| 122 }; | |
| 123 | |
| 1204 | 124 static const struct sized_memory_description csted_description = { |
| 771 | 125 sizeof (coding_system_type_entry_dynarr), |
| 126 csted_description_1 | |
| 127 }; | |
| 128 | |
| 129 static Lisp_Object Vcoding_system_type_list; | |
| 130 | |
| 131 /* Coding system currently associated with each coding category. */ | |
| 132 Lisp_Object coding_category_system[MAX_DETECTOR_CATEGORIES]; | |
| 133 | |
| 134 /* Table of all coding categories in decreasing order of priority. | |
| 135 This describes a permutation of the possible coding categories. */ | |
| 136 int coding_category_by_priority[MAX_DETECTOR_CATEGORIES]; | |
| 137 | |
| 138 /* Value used with to give a unique name to nameless coding systems */ | |
| 139 int coding_system_tick; | |
| 140 | |
| 141 int coding_detector_count; | |
| 142 int coding_detector_category_count; | |
| 143 | |
| 144 detector_dynarr *all_coding_detectors; | |
| 145 | |
| 1204 | 146 static const struct memory_description struct_detector_category_description_1[] |
| 771 | 147 = |
| 148 { | |
| 149 { XD_LISP_OBJECT, offsetof (struct detector_category, sym) }, | |
| 150 { XD_END } | |
| 151 }; | |
| 152 | |
| 1204 | 153 static const struct sized_memory_description struct_detector_category_description = |
| 771 | 154 { |
| 155 sizeof (struct detector_category), | |
| 156 struct_detector_category_description_1 | |
| 428 | 157 }; |
| 158 | |
| 1204 | 159 static const struct memory_description detector_category_dynarr_description_1[] = |
| 771 | 160 { |
| 161 XD_DYNARR_DESC (detector_category_dynarr, | |
| 162 &struct_detector_category_description), | |
| 163 { XD_END } | |
| 164 }; | |
| 165 | |
| 1204 | 166 static const struct sized_memory_description detector_category_dynarr_description = { |
| 771 | 167 sizeof (detector_category_dynarr), |
| 168 detector_category_dynarr_description_1 | |
| 169 }; | |
| 170 | |
| 1204 | 171 static const struct memory_description struct_detector_description_1[] |
| 771 | 172 = |
| 173 { | |
| 2367 | 174 { XD_BLOCK_PTR, offsetof (struct detector, cats), 1, |
| 2551 | 175 { &detector_category_dynarr_description } }, |
| 771 | 176 { XD_END } |
| 177 }; | |
| 178 | |
| 1204 | 179 static const struct sized_memory_description struct_detector_description = |
| 771 | 180 { |
| 181 sizeof (struct detector), | |
| 182 struct_detector_description_1 | |
| 183 }; | |
| 184 | |
| 1204 | 185 static const struct memory_description detector_dynarr_description_1[] = |
| 771 | 186 { |
| 187 XD_DYNARR_DESC (detector_dynarr, &struct_detector_description), | |
| 188 { XD_END } | |
| 189 }; | |
| 190 | |
| 1204 | 191 static const struct sized_memory_description detector_dynarr_description = { |
| 771 | 192 sizeof (detector_dynarr), |
| 193 detector_dynarr_description_1 | |
| 194 }; | |
| 428 | 195 |
| 196 Lisp_Object Qcoding_systemp; | |
| 197 | |
| 771 | 198 Lisp_Object Qraw_text; |
| 428 | 199 |
| 200 Lisp_Object Qmnemonic, Qeol_type; | |
| 201 Lisp_Object Qcr, Qcrlf, Qlf; | |
| 202 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf; | |
| 203 Lisp_Object Qpost_read_conversion; | |
| 204 Lisp_Object Qpre_write_conversion; | |
| 205 | |
| 771 | 206 Lisp_Object Qtranslation_table_for_decode; |
| 207 Lisp_Object Qtranslation_table_for_encode; | |
| 208 Lisp_Object Qsafe_chars; | |
| 209 Lisp_Object Qsafe_charsets; | |
| 210 Lisp_Object Qmime_charset; | |
| 211 Lisp_Object Qvalid_codes; | |
| 212 | |
| 213 Lisp_Object Qno_conversion; | |
| 214 Lisp_Object Qconvert_eol; | |
| 440 | 215 Lisp_Object Qescape_quoted; |
| 771 | 216 Lisp_Object Qencode, Qdecode; |
| 217 | |
| 218 Lisp_Object Qconvert_eol_lf, Qconvert_eol_cr, Qconvert_eol_crlf; | |
| 219 Lisp_Object Qconvert_eol_autodetect; | |
| 220 | |
| 221 Lisp_Object Qnear_certainty, Qquite_probable, Qsomewhat_likely; | |
| 1494 | 222 Lisp_Object Qslightly_likely; |
| 771 | 223 Lisp_Object Qas_likely_as_unlikely, Qsomewhat_unlikely, Qquite_improbable; |
| 224 Lisp_Object Qnearly_impossible; | |
| 225 | |
| 226 Lisp_Object Qdo_eol, Qdo_coding; | |
| 227 | |
| 228 Lisp_Object Qcanonicalize_after_coding; | |
| 229 | |
| 1347 | 230 Lisp_Object QScoding_system_cookie; |
| 231 | |
| 771 | 232 /* This is used to convert autodetected coding systems into existing |
| 233 systems. For example, the chain undecided->convert-eol-autodetect may | |
| 234 have its separate parts detected as mswindows-multibyte and | |
| 235 convert-eol-crlf, and the result needs to be mapped to | |
| 236 mswindows-multibyte-dos. */ | |
| 237 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 238 any more. */ | |
| 239 static Lisp_Object Vchain_canonicalize_hash_table; | |
| 240 | |
| 241 #ifdef HAVE_ZLIB | |
| 242 Lisp_Object Qgzip; | |
| 428 | 243 #endif |
| 771 | 244 |
| 2297 | 245 /* Maps symbols (coding system names) to either coding system objects or |
| 246 (for aliases) other names. */ | |
| 771 | 247 static Lisp_Object Vcoding_system_hash_table; |
| 428 | 248 |
| 249 int enable_multibyte_characters; | |
| 250 | |
| 251 EXFUN (Fcopy_coding_system, 2); | |
| 252 | |
| 253 | |
| 254 /************************************************************************/ | |
| 771 | 255 /* Coding system object methods */ |
| 428 | 256 /************************************************************************/ |
| 257 | |
| 258 static Lisp_Object | |
| 259 mark_coding_system (Lisp_Object obj) | |
| 260 { | |
| 261 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj); | |
| 262 | |
| 1204 | 263 #define MARKED_SLOT(x) mark_object (codesys->x); |
| 264 #include "coding-system-slots.h" | |
| 771 | 265 |
| 266 MAYBE_CODESYSMETH (codesys, mark, (obj)); | |
| 428 | 267 |
| 1204 | 268 return Qnil; |
| 428 | 269 } |
| 270 | |
| 271 static void | |
| 771 | 272 print_coding_system_properties (Lisp_Object obj, Lisp_Object printcharfun) |
| 273 { | |
| 274 Lisp_Coding_System *c = XCODING_SYSTEM (obj); | |
| 275 print_internal (c->methods->type, printcharfun, 1); | |
| 276 MAYBE_CODESYSMETH (c, print, (obj, printcharfun, 1)); | |
| 277 if (CODING_SYSTEM_EOL_TYPE (c) != EOL_AUTODETECT) | |
| 278 write_fmt_string_lisp (printcharfun, " eol-type=%s", | |
| 279 1, Fcoding_system_property (obj, Qeol_type)); | |
| 280 } | |
| 281 | |
| 282 static void | |
| 428 | 283 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun, |
| 2286 | 284 int UNUSED (escapeflag)) |
| 428 | 285 { |
| 286 Lisp_Coding_System *c = XCODING_SYSTEM (obj); | |
| 287 if (print_readably) | |
| 771 | 288 printing_unreadable_object |
| 289 ("printing unreadable object #<coding-system 0x%x>", c->header.uid); | |
| 290 | |
| 291 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name); | |
| 292 print_coding_system_properties (obj, printcharfun); | |
| 826 | 293 write_c_string (printcharfun, ">"); |
| 428 | 294 } |
| 295 | |
| 771 | 296 /* Print an abbreviated version of a coding system (but still containing |
| 297 all the information), for use within a coding system print method. */ | |
| 298 | |
| 299 static void | |
| 300 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun, | |
| 2286 | 301 int UNUSED (escapeflag)) |
| 771 | 302 { |
| 800 | 303 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs)); |
| 771 | 304 print_coding_system_properties (cs, printcharfun); |
| 826 | 305 write_c_string (printcharfun, "]"); |
| 771 | 306 } |
| 307 | |
| 428 | 308 static void |
| 309 finalize_coding_system (void *header, int for_disksave) | |
| 310 { | |
| 771 | 311 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header); |
| 428 | 312 /* Since coding systems never go away, this function is not |
| 313 necessary. But it would be necessary if we changed things | |
| 314 so that coding systems could go away. */ | |
| 315 if (!for_disksave) /* see comment in lstream.c */ | |
| 771 | 316 MAYBE_XCODESYSMETH (cs, finalize, (cs)); |
| 317 } | |
| 318 | |
| 319 static Bytecount | |
| 320 sizeof_coding_system (const void *header) | |
| 321 { | |
| 322 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header; | |
| 323 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size; | |
| 428 | 324 } |
| 325 | |
| 1204 | 326 static const struct memory_description coding_system_methods_description_1[] |
| 771 | 327 = { |
| 328 { XD_LISP_OBJECT, | |
| 329 offsetof (struct coding_system_methods, type) }, | |
| 330 { XD_LISP_OBJECT, | |
| 331 offsetof (struct coding_system_methods, predicate_symbol) }, | |
| 332 { XD_END } | |
| 333 }; | |
| 334 | |
| 1204 | 335 const struct sized_memory_description coding_system_methods_description = { |
| 771 | 336 sizeof (struct coding_system_methods), |
| 337 coding_system_methods_description_1 | |
| 338 }; | |
| 339 | |
| 1204 | 340 static const struct sized_memory_description coding_system_extra_description_map[] = |
| 341 { | |
| 342 { offsetof (Lisp_Coding_System, methods) }, | |
| 343 { offsetof (struct coding_system_methods, extra_description) }, | |
| 344 { -1 }, | |
| 771 | 345 }; |
| 346 | |
| 1204 | 347 static const struct memory_description coding_system_description[] = |
| 428 | 348 { |
| 2367 | 349 { XD_BLOCK_PTR, offsetof (Lisp_Coding_System, methods), 1, |
| 2551 | 350 { &coding_system_methods_description } }, |
| 1204 | 351 #define MARKED_SLOT(x) { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, x) }, |
| 352 #define MARKED_SLOT_ARRAY(slot, size) \ | |
| 353 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, slot), size }, | |
| 354 #include "coding-system-slots.h" | |
| 2367 | 355 { XD_BLOCK_ARRAY, offsetof (Lisp_Coding_System, data), 1, |
| 2551 | 356 { coding_system_extra_description_map } }, |
| 1204 | 357 { XD_END } |
| 771 | 358 }; |
| 359 | |
| 1204 | 360 static const struct memory_description coding_system_empty_extra_description_1[] = |
| 361 { | |
| 362 { XD_END } | |
| 363 }; | |
| 364 | |
| 365 const struct sized_memory_description coding_system_empty_extra_description = { | |
| 366 0, coding_system_empty_extra_description_1 | |
| 367 }; | |
| 368 | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
369 DEFINE_SIZABLE_LISP_OBJECT ("coding-system", coding_system, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
370 mark_coding_system, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
371 print_coding_system, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
372 finalize_coding_system, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
373 0, 0, coding_system_description, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
374 sizeof_coding_system, |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
375 Lisp_Coding_System); |
| 771 | 376 |
| 377 /************************************************************************/ | |
| 378 /* Creating coding systems */ | |
| 379 /************************************************************************/ | |
| 380 | |
| 381 static struct coding_system_methods * | |
| 382 decode_coding_system_type (Lisp_Object type, Error_Behavior errb) | |
| 428 | 383 { |
| 771 | 384 int i; |
| 385 | |
| 386 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++) | |
| 428 | 387 { |
| 771 | 388 if (EQ (type, |
| 389 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type)) | |
| 390 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths; | |
| 428 | 391 } |
| 771 | 392 |
| 393 maybe_invalid_constant ("Invalid coding system type", type, | |
| 394 Qcoding_system, errb); | |
| 395 | |
| 396 return 0; | |
| 428 | 397 } |
| 398 | |
| 771 | 399 static int |
| 400 valid_coding_system_type_p (Lisp_Object type) | |
| 428 | 401 { |
| 771 | 402 return decode_coding_system_type (type, ERROR_ME_NOT) != 0; |
| 403 } | |
| 404 | |
| 405 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /* | |
| 406 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid. | |
| 407 Valid types depend on how XEmacs was compiled but may include | |
| 3025 | 408 `undecided', `chain', `integer', `ccl', `iso2022', `big5', `shift-jis', |
| 409 `utf-16', `ucs-4', `utf-8', etc. | |
| 771 | 410 */ |
| 411 (coding_system_type)) | |
| 412 { | |
| 413 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil; | |
| 414 } | |
| 415 | |
| 416 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /* | |
| 417 Return a list of valid coding system types. | |
| 418 */ | |
| 419 ()) | |
| 420 { | |
| 421 return Fcopy_sequence (Vcoding_system_type_list); | |
| 422 } | |
| 423 | |
| 424 void | |
| 425 add_entry_to_coding_system_type_list (struct coding_system_methods *meths) | |
| 426 { | |
| 427 struct coding_system_type_entry entry; | |
| 428 | |
| 429 entry.meths = meths; | |
| 430 Dynarr_add (the_coding_system_type_entry_dynarr, entry); | |
| 431 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list); | |
| 428 | 432 } |
| 433 | |
| 434 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /* | |
| 435 Return t if OBJECT is a coding system. | |
| 436 A coding system is an object that defines how text containing multiple | |
| 437 character sets is encoded into a stream of (typically 8-bit) bytes. | |
| 438 The coding system is used to decode the stream into a series of | |
| 439 characters (which may be from multiple charsets) when the text is read | |
| 440 from a file or process, and is used to encode the text back into the | |
| 441 same format when it is written out to a file or process. | |
| 442 | |
| 443 For example, many ISO2022-compliant coding systems (such as Compound | |
| 444 Text, which is used for inter-client data under the X Window System) | |
| 445 use escape sequences to switch between different charsets -- Japanese | |
| 446 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked | |
| 447 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See | |
| 448 `make-coding-system' for more information. | |
| 449 | |
| 450 Coding systems are normally identified using a symbol, and the | |
| 451 symbol is accepted in place of the actual coding system object whenever | |
| 452 a coding system is called for. (This is similar to how faces work.) | |
| 453 */ | |
| 454 (object)) | |
| 455 { | |
| 456 return CODING_SYSTEMP (object) ? Qt : Qnil; | |
| 457 } | |
| 458 | |
| 459 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /* | |
| 460 Retrieve the coding system of the given name. | |
| 461 | |
| 462 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply | |
| 463 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol. | |
| 464 If there is no such coding system, nil is returned. Otherwise the | |
| 465 associated coding system object is returned. | |
| 466 */ | |
| 467 (coding_system_or_name)) | |
| 468 { | |
| 469 if (NILP (coding_system_or_name)) | |
| 470 coding_system_or_name = Qbinary; | |
| 440 | 471 else if (CODING_SYSTEMP (coding_system_or_name)) |
| 472 return coding_system_or_name; | |
| 428 | 473 else |
| 474 CHECK_SYMBOL (coding_system_or_name); | |
| 475 | |
| 440 | 476 while (1) |
| 477 { | |
| 478 coding_system_or_name = | |
| 479 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil); | |
| 480 | |
| 771 | 481 if (CODING_SYSTEMP (coding_system_or_name) |
| 482 || NILP (coding_system_or_name)) | |
| 440 | 483 return coding_system_or_name; |
| 484 } | |
| 428 | 485 } |
| 486 | |
| 487 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /* | |
| 488 Retrieve the coding system of the given name. | |
| 489 Same as `find-coding-system' except that if there is no such | |
| 490 coding system, an error is signaled instead of returning nil. | |
| 491 */ | |
| 492 (name)) | |
| 493 { | |
| 494 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 495 | |
| 496 if (NILP (coding_system)) | |
| 563 | 497 invalid_argument ("No such coding system", name); |
| 428 | 498 return coding_system; |
| 499 } | |
| 500 | |
| 771 | 501 int |
| 502 coding_system_is_binary (Lisp_Object coding_system) | |
| 503 { | |
| 504 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 505 return | |
| 506 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) && | |
| 507 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF && | |
| 508 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) && | |
| 509 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil)); | |
| 510 } | |
| 511 | |
| 512 static Lisp_Object | |
| 513 coding_system_real_canonical (Lisp_Object cs) | |
| 514 { | |
| 515 if (!NILP (XCODING_SYSTEM_CANONICAL (cs))) | |
| 516 return XCODING_SYSTEM_CANONICAL (cs); | |
| 517 return cs; | |
| 518 } | |
| 519 | |
| 520 /* Return true if coding system is of the "standard" type that decodes | |
| 521 bytes into characters (suitable for decoding a text file). */ | |
| 522 int | |
| 523 coding_system_is_for_text_file (Lisp_Object coding_system) | |
| 524 { | |
| 525 return (XCODESYSMETH_OR_GIVEN | |
| 526 (coding_system, conversion_end_type, | |
| 527 (coding_system_real_canonical (coding_system)), | |
| 528 DECODES_BYTE_TO_CHARACTER) == | |
| 529 DECODES_BYTE_TO_CHARACTER); | |
| 530 } | |
| 531 | |
| 532 static int | |
| 533 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 534 { | |
| 535 enum source_sink_type type = | |
| 536 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type, | |
| 537 (coding_system_real_canonical (cs)), | |
| 538 DECODES_BYTE_TO_CHARACTER); | |
| 539 if (sex == CODING_SOURCE) | |
| 540 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 541 type == DECODES_CHARACTER_TO_BYTE); | |
| 542 else | |
| 543 return (type == DECODES_CHARACTER_TO_CHARACTER || | |
| 544 type == DECODES_BYTE_TO_CHARACTER); | |
| 545 } | |
| 546 | |
| 547 static int | |
| 548 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex) | |
| 549 { | |
| 550 return decoding_source_sink_type_is_char (cs, | |
| 551 /* Sex change */ | |
| 552 sex == CODING_SOURCE ? | |
| 553 CODING_SINK : CODING_SOURCE); | |
| 554 } | |
| 555 | |
| 556 /* Like Ffind_coding_system() but check that the coding system is of the | |
| 557 "standard" type that decodes bytes into characters (suitable for | |
| 558 decoding a text file), and if not, returns an appropriate wrapper that | |
| 559 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 560 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 561 system to do this. */ | |
| 562 | |
| 563 Lisp_Object | |
| 564 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 565 { | |
| 566 Lisp_Object coding_system = Ffind_coding_system (name); | |
| 567 Lisp_Object wrapper = coding_system; | |
| 568 | |
| 569 if (NILP (coding_system)) | |
| 570 return Qnil; | |
| 571 if (!coding_system_is_for_text_file (coding_system)) | |
| 572 { | |
| 573 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system); | |
| 574 if (NILP (wrapper)) | |
| 575 { | |
| 576 Lisp_Object chain; | |
| 577 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK)) | |
| 578 chain = list2 (coding_system, Qbinary); | |
| 579 else | |
| 580 chain = list1 (coding_system); | |
| 581 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE)) | |
| 582 chain = Fcons (Qbinary, chain); | |
| 583 wrapper = | |
| 584 make_internal_coding_system | |
| 585 (coding_system, | |
| 586 "internal-text-file-wrapper", | |
| 587 Qchain, | |
| 588 Qunbound, list4 (Qchain, chain, | |
| 589 Qcanonicalize_after_coding, coding_system)); | |
| 590 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper; | |
| 591 } | |
| 592 } | |
| 593 | |
| 594 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT) | |
| 595 return wrapper; | |
| 596 | |
| 597 coding_system = wrapper; | |
| 598 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system); | |
| 599 if (!NILP (wrapper)) | |
| 600 return wrapper; | |
| 601 wrapper = | |
| 602 make_internal_coding_system | |
| 603 (coding_system, | |
| 604 "internal-auto-eol-wrapper", | |
| 605 Qundecided, Qunbound, | |
| 606 list4 (Qcoding_system, coding_system, | |
| 607 Qdo_eol, Qt)); | |
| 608 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper; | |
| 609 return wrapper; | |
| 610 } | |
| 611 | |
| 612 /* Like Fget_coding_system() but verify that the coding system is of the | |
| 613 "standard" type that decodes bytes into characters (suitable for | |
| 614 decoding a text file), and if not, returns an appropriate wrapper that | |
| 615 does. Also, if EOL_WRAP is non-zero, check whether this coding system | |
| 616 wants EOL auto-detection, and if so, wrap with a convert-eol coding | |
| 617 system to do this. */ | |
| 618 | |
| 619 Lisp_Object | |
| 620 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap) | |
| 621 { | |
| 622 Lisp_Object coding_system = find_coding_system_for_text_file (name, | |
| 623 eol_wrap); | |
| 624 if (NILP (coding_system)) | |
| 625 invalid_argument ("No such coding system", name); | |
| 626 return coding_system; | |
| 627 } | |
| 628 | |
| 629 /* We store the coding systems in hash tables with the names as the | |
| 630 key and the actual coding system object as the value. Occasionally | |
| 631 we need to use them in a list format. These routines provide us | |
| 632 with that. */ | |
| 428 | 633 struct coding_system_list_closure |
| 634 { | |
| 635 Lisp_Object *coding_system_list; | |
| 771 | 636 int normal; |
| 637 int internal; | |
| 428 | 638 }; |
| 639 | |
| 640 static int | |
| 2286 | 641 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object UNUSED (value), |
| 428 | 642 void *coding_system_list_closure) |
| 643 { | |
| 644 /* This function can GC */ | |
| 645 struct coding_system_list_closure *cscl = | |
| 646 (struct coding_system_list_closure *) coding_system_list_closure; | |
| 647 Lisp_Object *coding_system_list = cscl->coding_system_list; | |
| 648 | |
| 771 | 649 /* We can't just use VALUE because KEY might be an alias, and we need |
| 650 the real coding system object. */ | |
| 651 if (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ? | |
| 652 cscl->internal : cscl->normal) | |
| 653 *coding_system_list = Fcons (key, *coding_system_list); | |
| 428 | 654 return 0; |
| 655 } | |
| 656 | |
| 2297 | 657 /* #### should we specify a conventional for "all coding systems"? */ |
| 771 | 658 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /* |
| 428 | 659 Return a list of the names of all defined coding systems. |
| 771 | 660 If INTERNAL is nil, only the normal (non-internal) coding systems are |
| 661 included. (Internal coding systems are created for various internal | |
| 662 purposes, such as implementing EOL types of CRLF and CR; generally, you do | |
| 663 not want to see these.) If it is t, only the internal coding systems are | |
| 664 included. If it is any other non-nil value both normal and internal are | |
| 665 included. | |
| 428 | 666 */ |
| 771 | 667 (internal)) |
| 428 | 668 { |
| 669 Lisp_Object coding_system_list = Qnil; | |
| 670 struct gcpro gcpro1; | |
| 671 struct coding_system_list_closure coding_system_list_closure; | |
| 672 | |
| 673 GCPRO1 (coding_system_list); | |
| 674 coding_system_list_closure.coding_system_list = &coding_system_list; | |
| 771 | 675 coding_system_list_closure.normal = !EQ (internal, Qt); |
| 676 coding_system_list_closure.internal = !NILP (internal); | |
| 428 | 677 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table, |
| 678 &coding_system_list_closure); | |
| 679 UNGCPRO; | |
| 680 | |
| 681 return coding_system_list; | |
| 682 } | |
| 683 | |
| 684 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /* | |
| 685 Return the name of the given coding system. | |
| 686 */ | |
| 687 (coding_system)) | |
| 688 { | |
| 689 coding_system = Fget_coding_system (coding_system); | |
| 690 return XCODING_SYSTEM_NAME (coding_system); | |
| 691 } | |
| 692 | |
| 693 static Lisp_Coding_System * | |
| 771 | 694 allocate_coding_system (struct coding_system_methods *codesys_meths, |
| 695 Bytecount data_size, | |
| 696 Lisp_Object name) | |
| 428 | 697 { |
| 771 | 698 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size; |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
699 Lisp_Object obj = ALLOC_SIZED_LISP_OBJECT (total_size, coding_system); |
|
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
700 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj); |
| 1204 | 701 |
| 771 | 702 codesys->methods = codesys_meths; |
| 1204 | 703 #define MARKED_SLOT(x) codesys->x = Qnil; |
| 704 #include "coding-system-slots.h" | |
| 705 | |
| 771 | 706 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF; |
| 707 CODING_SYSTEM_NAME (codesys) = name; | |
| 708 | |
| 709 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys))); | |
| 428 | 710 |
| 711 return codesys; | |
| 712 } | |
| 713 | |
| 771 | 714 static enum eol_type |
| 715 symbol_to_eol_type (Lisp_Object symbol) | |
| 716 { | |
| 717 CHECK_SYMBOL (symbol); | |
| 718 if (NILP (symbol)) return EOL_AUTODETECT; | |
| 719 if (EQ (symbol, Qlf)) return EOL_LF; | |
| 720 if (EQ (symbol, Qcrlf)) return EOL_CRLF; | |
| 721 if (EQ (symbol, Qcr)) return EOL_CR; | |
| 722 | |
| 723 invalid_constant ("Unrecognized eol type", symbol); | |
| 1204 | 724 RETURN_NOT_REACHED (EOL_AUTODETECT); |
| 771 | 725 } |
| 726 | |
| 727 static Lisp_Object | |
| 728 eol_type_to_symbol (enum eol_type type) | |
| 729 { | |
| 730 switch (type) | |
| 731 { | |
| 2500 | 732 default: ABORT (); |
| 771 | 733 case EOL_LF: return Qlf; |
| 734 case EOL_CRLF: return Qcrlf; | |
| 735 case EOL_CR: return Qcr; | |
| 736 case EOL_AUTODETECT: return Qnil; | |
| 737 } | |
| 738 } | |
| 739 | |
| 740 struct subsidiary_type | |
| 741 { | |
| 2367 | 742 Ascbyte *extension; |
| 743 Ascbyte *mnemonic_ext; | |
| 771 | 744 enum eol_type eol; |
| 745 }; | |
| 746 | |
| 747 static struct subsidiary_type coding_subsidiary_list[] = | |
| 748 { { "-unix", "", EOL_LF }, | |
| 749 { "-dos", ":T", EOL_CRLF }, | |
| 750 { "-mac", ":t", EOL_CR } }; | |
| 751 | |
| 752 /* kludge */ | |
| 428 | 753 static void |
| 771 | 754 setup_eol_coding_systems (Lisp_Object codesys) |
| 428 | 755 { |
| 793 | 756 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name); |
| 2367 | 757 Ibyte *codesys_name = alloca_ibytes (len + 7); |
| 771 | 758 int mlen = -1; |
| 867 | 759 Ibyte *codesys_mnemonic = 0; |
| 771 | 760 Lisp_Object codesys_name_sym, sub_codesys; |
| 761 int i; | |
| 762 | |
| 763 memcpy (codesys_name, | |
| 793 | 764 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len); |
| 771 | 765 |
| 766 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys))) | |
| 428 | 767 { |
| 771 | 768 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys)); |
| 2367 | 769 codesys_mnemonic = alloca_ibytes (mlen + 7); |
| 771 | 770 memcpy (codesys_mnemonic, |
| 771 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen); | |
| 772 } | |
| 773 | |
| 774 /* Create three "subsidiary" coding systems, decoding data encoded using | |
| 775 each of the three EOL types. We do this for each subsidiary by | |
| 776 copying the original coding system, setting the EOL type | |
| 777 appropriately, and setting the CANONICAL member of the new coding | |
| 778 system to be a chain consisting of the original coding system followed | |
| 779 by a convert-eol coding system to do the EOL decoding. For EOL type | |
| 780 LF, however, we don't need any decoding, so we skip creating a | |
| 781 CANONICAL. | |
| 782 | |
| 783 If the original coding system is not a text-type coding system | |
| 784 (decodes byte->char), we need to coerce it to one by the appropriate | |
| 785 wrapping in CANONICAL. */ | |
| 786 | |
| 787 for (i = 0; i < countof (coding_subsidiary_list); i++) | |
| 788 { | |
| 2367 | 789 Ascbyte *extension = coding_subsidiary_list[i].extension; |
| 790 Ascbyte *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext; | |
| 771 | 791 enum eol_type eol = coding_subsidiary_list[i].eol; |
| 792 | |
| 2367 | 793 qxestrcpy_ascii (codesys_name + len, extension); |
| 771 | 794 codesys_name_sym = intern_int (codesys_name); |
| 795 if (mlen != -1) | |
| 2367 | 796 qxestrcpy_ascii (codesys_mnemonic + mlen, mnemonic_ext); |
| 771 | 797 |
| 798 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym); | |
| 799 if (mlen != -1) | |
| 800 XCODING_SYSTEM_MNEMONIC (sub_codesys) = | |
| 801 build_intstring (codesys_mnemonic); | |
| 802 | |
| 803 if (eol != EOL_LF) | |
| 804 { | |
| 805 Lisp_Object chain = list2 (get_coding_system_for_text_file | |
| 806 (codesys, 0), | |
| 807 eol == EOL_CR ? Qconvert_eol_cr : | |
| 808 Qconvert_eol_crlf); | |
| 809 Lisp_Object canon = | |
| 810 make_internal_coding_system | |
| 811 (sub_codesys, "internal-subsidiary-eol-wrapper", | |
| 812 Qchain, Qunbound, | |
| 813 mlen != -1 ? | |
| 814 list6 (Qmnemonic, build_intstring (codesys_mnemonic), | |
| 815 Qchain, chain, | |
| 816 Qcanonicalize_after_coding, sub_codesys) : | |
| 817 list4 (Qchain, chain, | |
| 818 Qcanonicalize_after_coding, sub_codesys)); | |
| 819 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon; | |
| 820 } | |
| 821 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol; | |
| 822 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys; | |
| 823 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys; | |
| 428 | 824 } |
| 825 } | |
| 826 | |
| 771 | 827 /* Basic function to create new coding systems. For `make-coding-system', |
| 828 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE, | |
| 829 DESCRIPTION, and PROPS are the same. All created coding systems are put | |
| 830 in a hash table indexed by NAME. | |
| 831 | |
| 832 If PREFIX is a string, NAME-OR-EXISTING should specify an existing | |
| 833 coding system (or nil), and an internal coding system will be created. | |
| 834 The name of the coding system will be constructed by combining PREFIX | |
| 835 with the name of the existing coding system (if given), and a number | |
| 836 will be appended to insure uniqueness. In such a case, if Qunbound is | |
| 837 given for DESCRIPTION, the description gets created based on the | |
| 838 generated name. Also, if no mnemonic is given in the properties list, a | |
| 839 mnemonic is created based on the generated name. | |
| 840 | |
| 841 For internal coding systems, the coding system is marked as internal | |
| 842 (see `coding-system-list'), and no subsidiaries will be created or | |
| 843 eol-wrapping will happen. Otherwise: | |
| 844 | |
| 845 -- if the eol-type property is `lf' or t, the coding system is merely | |
| 846 created and returned. (For t, the coding system will be wrapped with | |
| 847 an EOL autodetector when it's used to read a file.) | |
| 848 | |
| 849 -- if eol-type is `crlf' or `cr', after the coding system object is | |
| 850 created, it will be wrapped in a chain with the appropriate | |
| 851 convert-eol coding system (either `convert-eol-crlf' or | |
| 852 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at | |
| 853 decoding time, and the opposite at encoding time. The resulting | |
| 854 chain becomes the CANONICAL field of the coding system object. | |
| 855 | |
| 856 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three | |
| 857 coding systems where the original coding system (before wrapping with | |
| 858 convert-eol-autodetect) is either unwrapped or wrapped with | |
| 859 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems | |
| 860 to handle LF, CRLF, and CR end-of-line indicators are created. (This | |
| 861 crazy crap is based on existing behavior in other Mule versions, | |
| 862 including FSF Emacs.) | |
| 863 */ | |
| 428 | 864 |
| 865 static Lisp_Object | |
| 2367 | 866 make_coding_system_1 (Lisp_Object name_or_existing, Ascbyte *prefix, |
| 771 | 867 Lisp_Object type, Lisp_Object description, |
| 868 Lisp_Object props) | |
| 428 | 869 { |
| 771 | 870 Lisp_Coding_System *cs; |
| 871 int need_to_setup_eol_systems = 1; | |
| 872 enum eol_type eol_wrapper = EOL_AUTODETECT; | |
| 873 struct coding_system_methods *meths; | |
| 874 Lisp_Object csobj; | |
| 875 Lisp_Object defmnem = Qnil; | |
| 876 | |
| 877 if (NILP (type)) | |
| 878 type = Qundecided; | |
| 879 meths = decode_coding_system_type (type, ERROR_ME); | |
| 880 | |
| 881 if (prefix) | |
| 428 | 882 { |
| 867 | 883 Ibyte *newname = |
| 771 | 884 emacs_sprintf_malloc (NULL, "%s-%s-%d", |
| 885 prefix, | |
| 867 | 886 NILP (name_or_existing) ? (Ibyte *) "nil" : |
| 771 | 887 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME |
| 888 (name_or_existing))), | |
| 889 ++coding_system_tick); | |
| 890 name_or_existing = intern_int (newname); | |
| 1726 | 891 xfree (newname, Ibyte *); |
| 771 | 892 |
| 893 if (UNBOUNDP (description)) | |
| 894 { | |
| 895 newname = | |
| 896 emacs_sprintf_malloc | |
| 897 (NULL, "For Internal Use (%s)", | |
| 898 XSTRING_DATA (Fsymbol_name (name_or_existing))); | |
| 899 description = build_intstring (newname); | |
| 1726 | 900 xfree (newname, Ibyte *); |
| 771 | 901 } |
| 902 | |
| 903 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick); | |
| 904 defmnem = build_intstring (newname); | |
| 1726 | 905 xfree (newname, Ibyte *); |
| 428 | 906 } |
| 771 | 907 else |
| 908 CHECK_SYMBOL (name_or_existing); | |
| 909 | |
| 910 if (!NILP (Ffind_coding_system (name_or_existing))) | |
| 911 invalid_operation ("Cannot redefine existing coding system", | |
| 912 name_or_existing); | |
| 913 | |
| 914 cs = allocate_coding_system (meths, meths->extra_data_size, | |
| 915 name_or_existing); | |
| 793 | 916 csobj = wrap_coding_system (cs); |
| 771 | 917 |
| 918 cs->internal_p = !!prefix; | |
| 919 | |
| 920 if (NILP (description)) | |
| 921 description = build_string (""); | |
| 922 else | |
| 923 CHECK_STRING (description); | |
| 924 CODING_SYSTEM_DESCRIPTION (cs) = description; | |
| 925 | |
| 926 if (!NILP (defmnem)) | |
| 927 CODING_SYSTEM_MNEMONIC (cs) = defmnem; | |
| 928 | |
| 929 { | |
| 930 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props) | |
| 931 { | |
| 932 int recognized = 1; | |
| 933 | |
| 934 if (EQ (key, Qmnemonic)) | |
| 935 { | |
| 936 if (!NILP (value)) | |
| 937 CHECK_STRING (value); | |
| 938 CODING_SYSTEM_MNEMONIC (cs) = value; | |
| 939 } | |
| 940 | |
| 941 else if (EQ (key, Qdocumentation)) | |
| 942 { | |
| 943 if (!NILP (value)) | |
| 944 CHECK_STRING (value); | |
| 945 CODING_SYSTEM_DOCUMENTATION (cs) = value; | |
| 946 } | |
| 947 | |
| 948 else if (EQ (key, Qeol_type)) | |
| 949 { | |
| 950 need_to_setup_eol_systems = NILP (value); | |
| 951 if (EQ (value, Qt)) | |
| 952 value = Qnil; | |
| 953 eol_wrapper = symbol_to_eol_type (value); | |
| 954 } | |
| 955 | |
| 956 else if (EQ (key, Qpost_read_conversion)) | |
| 957 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value; | |
| 958 else if (EQ (key, Qpre_write_conversion)) | |
| 959 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value; | |
| 960 /* FSF compatibility */ | |
| 961 else if (EQ (key, Qtranslation_table_for_decode)) | |
| 962 ; | |
| 963 else if (EQ (key, Qtranslation_table_for_encode)) | |
| 964 ; | |
| 965 else if (EQ (key, Qsafe_chars)) | |
| 966 ; | |
| 967 else if (EQ (key, Qsafe_charsets)) | |
| 968 ; | |
| 969 else if (EQ (key, Qmime_charset)) | |
| 970 ; | |
| 971 else if (EQ (key, Qvalid_codes)) | |
| 972 ; | |
| 973 else | |
| 974 recognized = CODESYSMETH_OR_GIVEN (cs, putprop, | |
| 975 (csobj, key, value), 0); | |
| 976 | |
| 977 if (!recognized) | |
| 978 invalid_constant ("Unrecognized property", key); | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 { | |
| 983 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 984 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil); | |
| 985 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system | |
| 986 below */ | |
| 987 | |
| 988 if (need_to_setup_eol_systems && !cs->internal_p) | |
| 989 setup_eol_coding_systems (csobj); | |
| 990 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF) | |
| 991 { | |
| 992 /* If a specific eol-type (other than LF) was specified, we handle | |
| 993 this by converting the coding system into a chain that wraps the | |
| 994 coding system along with a convert-eol system after it, in | |
| 995 exactly that same switcheroo fashion that the normal | |
| 996 canonicalize method works -- BUT we will run into a problem if | |
| 997 we do it the obvious way, because when `chain' creates its | |
| 998 substreams, the substream containing the coding system we're | |
| 999 creating will have canonicalization expansion done on it, | |
| 1000 leading to infinite recursion. So we have to generate a new, | |
| 1001 internal coding system with the previous value of CANONICAL. */ | |
| 867 | 1002 Ibyte *newname = |
| 771 | 1003 emacs_sprintf_malloc |
| 1004 (NULL, "internal-eol-copy-%s-%d", | |
| 1005 XSTRING_DATA (Fsymbol_name (name_or_existing)), | |
| 1006 ++coding_system_tick); | |
| 1007 Lisp_Object newnamesym = intern_int (newname); | |
| 1008 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym); | |
| 1726 | 1009 xfree (newname, Ibyte *); |
| 771 | 1010 |
| 1011 XCODING_SYSTEM_CANONICAL (csobj) = | |
| 1012 make_internal_coding_system | |
| 1013 (csobj, | |
| 1014 "internal-eol-wrapper", | |
| 1015 Qchain, Qunbound, | |
| 1016 list4 (Qchain, | |
| 1017 list2 (copied, | |
| 1018 eol_wrapper == EOL_CR ? | |
| 1019 Qconvert_eol_cr : | |
| 1020 Qconvert_eol_crlf), | |
| 1021 Qcanonicalize_after_coding, | |
| 1022 csobj)); | |
| 1023 } | |
| 1024 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper; | |
| 1025 } | |
| 1026 | |
| 1027 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table); | |
| 1028 | |
| 1029 return csobj; | |
| 428 | 1030 } |
| 1031 | |
| 771 | 1032 Lisp_Object |
| 2367 | 1033 make_internal_coding_system (Lisp_Object existing, Ascbyte *prefix, |
| 771 | 1034 Lisp_Object type, Lisp_Object description, |
| 1035 Lisp_Object props) | |
| 1036 { | |
| 1037 return make_coding_system_1 (existing, prefix, type, description, props); | |
| 1038 } | |
| 428 | 1039 |
| 1040 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /* | |
| 1041 Register symbol NAME as a coding system. | |
| 1042 | |
| 1043 TYPE describes the conversion method used and should be one of | |
| 1044 | |
| 3025 | 1045 nil or `undecided' |
| 428 | 1046 Automatic conversion. XEmacs attempts to detect the coding system |
| 1047 used in the file. | |
| 3025 | 1048 `chain' |
| 771 | 1049 Chain two or more coding systems together to make a combination coding |
| 1050 system. | |
| 3025 | 1051 `no-conversion' |
| 428 | 1052 No conversion. Use this for binary files and such. On output, |
| 1053 graphic characters that are not in ASCII or Latin-1 will be | |
| 1054 replaced by a ?. (For a no-conversion-encoded buffer, these | |
| 1055 characters will only be present if you explicitly insert them.) | |
| 3025 | 1056 `convert-eol' |
| 771 | 1057 Convert CRLF sequences or CR to LF. |
| 3025 | 1058 `shift-jis' |
| 428 | 1059 Shift-JIS (a Japanese encoding commonly used in PC operating systems). |
| 3025 | 1060 `unicode' |
| 771 | 1061 Any Unicode encoding (UCS-4, UTF-8, UTF-16, etc.). |
| 3025 | 1062 `mswindows-unicode-to-multibyte' |
| 771 | 1063 (MS Windows only) Converts from Windows Unicode to Windows Multibyte |
| 1064 (any code page encoding) upon encoding, and the other way upon decoding. | |
| 3025 | 1065 `mswindows-multibyte' |
| 771 | 1066 Converts to or from Windows Multibyte (any code page encoding). |
| 1067 This is resolved into a chain of `mswindows-unicode' and | |
| 1068 `mswindows-unicode-to-multibyte'. | |
| 3025 | 1069 `iso2022' |
| 428 | 1070 Any ISO2022-compliant encoding. Among other things, this includes |
| 1071 JIS (the Japanese encoding commonly used for e-mail), EUC (the | |
| 1072 standard Unix encoding for Japanese and other languages), and | |
| 1073 Compound Text (the encoding used in X11). You can specify more | |
| 442 | 1074 specific information about the conversion with the PROPS argument. |
| 3025 | 1075 `big5' |
| 2819 | 1076 Big5 (the encoding commonly used for Mandarin Chinese in Taiwan). |
| 3025 | 1077 `ccl' |
| 428 | 1078 The conversion is performed using a user-written pseudo-code |
| 1079 program. CCL (Code Conversion Language) is the name of this | |
| 1080 pseudo-code. | |
| 3025 | 1081 `gzip' |
| 771 | 1082 GZIP compression format. |
| 3025 | 1083 `internal' |
| 428 | 1084 Write out or read in the raw contents of the memory representing |
| 1085 the buffer's text. This is primarily useful for debugging | |
| 1086 purposes, and is only enabled when XEmacs has been compiled with | |
| 1087 DEBUG_XEMACS defined (via the --debug configure option). | |
| 3025 | 1088 WARNING: Reading in a file using `internal' conversion can result |
| 428 | 1089 in an internal inconsistency in the memory representing a |
| 1090 buffer's text, which will produce unpredictable results and may | |
| 1091 cause XEmacs to crash. Under normal circumstances you should | |
| 3025 | 1092 never use `internal' conversion. |
| 428 | 1093 |
| 771 | 1094 DESCRIPTION is a short English phrase describing the coding system, |
| 1095 suitable for use as a menu item. (See also the `documentation' property | |
| 1096 below.) | |
| 428 | 1097 |
| 1098 PROPS is a property list, describing the specific nature of the | |
| 1099 character set. Recognized properties are: | |
| 1100 | |
| 3025 | 1101 `mnemonic' |
| 428 | 1102 String to be displayed in the modeline when this coding system is |
| 1103 active. | |
| 1104 | |
| 3025 | 1105 `documentation' |
| 771 | 1106 Detailed documentation on the coding system. |
| 1107 | |
| 3025 | 1108 `eol-type' |
| 428 | 1109 End-of-line conversion to be used. It should be one of |
| 1110 | |
| 1111 nil | |
| 1112 Automatically detect the end-of-line type (LF, CRLF, | |
| 1113 or CR). Also generate subsidiary coding systems named | |
| 1114 `NAME-unix', `NAME-dos', and `NAME-mac', that are | |
| 1115 identical to this coding system but have an EOL-TYPE | |
| 3025 | 1116 value of `lf', `crlf', and `cr', respectively. |
| 1117 `lf' | |
| 428 | 1118 The end of a line is marked externally using ASCII LF. |
| 1119 Since this is also the way that XEmacs represents an | |
| 1120 end-of-line internally, specifying this option results | |
| 1121 in no end-of-line conversion. This is the standard | |
| 1122 format for Unix text files. | |
| 3025 | 1123 `crlf' |
| 428 | 1124 The end of a line is marked externally using ASCII |
| 1125 CRLF. This is the standard format for MS-DOS text | |
| 1126 files. | |
| 3025 | 1127 `cr' |
| 428 | 1128 The end of a line is marked externally using ASCII CR. |
| 1129 This is the standard format for Macintosh text files. | |
| 1130 t | |
| 1131 Automatically detect the end-of-line type but do not | |
| 1132 generate subsidiary coding systems. (This value is | |
| 1133 converted to nil when stored internally, and | |
| 1134 `coding-system-property' will return nil.) | |
| 1135 | |
| 3025 | 1136 `post-read-conversion' |
| 771 | 1137 The value is a function to call after some text is inserted and |
| 1138 decoded by the coding system itself and before any functions in | |
| 1139 `after-change-functions' are called. (#### Not actually true in | |
| 1140 XEmacs. `after-change-functions' will be called twice if | |
| 1141 `post-read-conversion' changes something.) The argument of this | |
| 1142 function is the same as for a function in | |
| 1143 `after-insert-file-functions', i.e. LENGTH of the text inserted, | |
| 1144 with point at the head of the text to be decoded. | |
| 428 | 1145 |
| 3025 | 1146 `pre-write-conversion' |
| 771 | 1147 The value is a function to call after all functions in |
| 1148 `write-region-annotate-functions' and `buffer-file-format' are | |
| 1149 called, and before the text is encoded by the coding system itself. | |
| 1150 The arguments to this function are the same as those of a function | |
| 1151 in `write-region-annotate-functions', i.e. FROM and TO, specifying | |
| 1152 a region of text. | |
| 1153 | |
| 1154 | |
| 1155 | |
| 1156 The following properties are allowed for FSF compatibility but currently | |
| 1157 ignored: | |
| 1158 | |
| 3025 | 1159 `translation-table-for-decode' |
| 771 | 1160 The value is a translation table to be applied on decoding. See |
| 1161 the function `make-translation-table' for the format of translation | |
| 1162 table. This is not applicable to CCL-based coding systems. | |
| 1163 | |
| 3025 | 1164 `translation-table-for-encode' |
| 771 | 1165 The value is a translation table to be applied on encoding. This is |
| 1166 not applicable to CCL-based coding systems. | |
| 1167 | |
| 3025 | 1168 `safe-chars' |
| 771 | 1169 The value is a char table. If a character has non-nil value in it, |
| 1170 the character is safely supported by the coding system. This | |
| 1171 overrides the specification of safe-charsets. | |
| 1172 | |
| 3025 | 1173 `safe-charsets' |
| 771 | 1174 The value is a list of charsets safely supported by the coding |
| 1175 system. The value t means that all charsets Emacs handles are | |
| 1176 supported. Even if some charset is not in this list, it doesn't | |
| 1177 mean that the charset can't be encoded in the coding system; | |
| 1178 it just means that some other receiver of text encoded | |
| 1179 in the coding system won't be able to handle that charset. | |
| 1180 | |
| 3025 | 1181 `mime-charset' |
| 771 | 1182 The value is a symbol of which name is `MIME-charset' parameter of |
| 1183 the coding system. | |
| 1184 | |
| 3025 | 1185 `valid-codes' (meaningful only for a coding system based on CCL) |
| 771 | 1186 The value is a list to indicate valid byte ranges of the encoded |
| 1187 file. Each element of the list is an integer or a cons of integer. | |
| 1188 In the former case, the integer value is a valid byte code. In the | |
| 1189 latter case, the integers specifies the range of valid byte codes. | |
| 1190 | |
| 1191 | |
| 1192 | |
| 3025 | 1193 The following additional property is recognized if TYPE is `convert-eol': |
| 1194 | |
| 1195 `subtype' | |
| 793 | 1196 One of `lf', `crlf', `cr' or nil (for autodetection). When decoding, |
| 1197 the corresponding sequence will be converted to LF. When encoding, | |
| 1198 the opposite happens. This coding system converts characters to | |
| 771 | 1199 characters. |
| 1200 | |
| 428 | 1201 |
| 1202 | |
| 3025 | 1203 The following additional properties are recognized if TYPE is `iso2022': |
| 1204 | |
| 1205 `charset-g0' | |
| 1206 `charset-g1' | |
| 1207 `charset-g2' | |
| 1208 `charset-g3' | |
| 428 | 1209 The character set initially designated to the G0 - G3 registers. |
| 1210 The value should be one of | |
| 1211 | |
| 1212 -- A charset object (designate that character set) | |
| 1213 -- nil (do not ever use this register) | |
| 1214 -- t (no character set is initially designated to | |
| 1215 the register, but may be later on; this automatically | |
| 1216 sets the corresponding `force-g*-on-output' property) | |
| 1217 | |
| 3025 | 1218 `force-g0-on-output' |
| 1219 `force-g1-on-output' | |
| 1220 `force-g2-on-output' | |
| 1221 `force-g2-on-output' | |
| 428 | 1222 If non-nil, send an explicit designation sequence on output before |
| 1223 using the specified register. | |
| 1224 | |
| 3025 | 1225 `short' |
| 428 | 1226 If non-nil, use the short forms "ESC $ @", "ESC $ A", and |
| 1227 "ESC $ B" on output in place of the full designation sequences | |
| 1228 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B". | |
| 1229 | |
| 3025 | 1230 `no-ascii-eol' |
| 428 | 1231 If non-nil, don't designate ASCII to G0 at each end of line on output. |
| 1232 Setting this to non-nil also suppresses other state-resetting that | |
| 1233 normally happens at the end of a line. | |
| 1234 | |
| 3025 | 1235 `no-ascii-cntl' |
| 428 | 1236 If non-nil, don't designate ASCII to G0 before control chars on output. |
| 1237 | |
| 3025 | 1238 `seven' |
| 428 | 1239 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit |
| 1240 environment. | |
| 1241 | |
| 3025 | 1242 `lock-shift' |
| 428 | 1243 If non-nil, use locking-shift (SO/SI) instead of single-shift |
| 1244 or designation by escape sequence. | |
| 1245 | |
| 3025 | 1246 `no-iso6429' |
| 428 | 1247 If non-nil, don't use ISO6429's direction specification. |
| 1248 | |
| 3025 | 1249 `escape-quoted' |
| 428 | 1250 If non-nil, literal control characters that are the same as |
| 1251 the beginning of a recognized ISO2022 or ISO6429 escape sequence | |
| 1252 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E), | |
| 1253 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character | |
| 1254 so that they can be properly distinguished from an escape sequence. | |
| 1255 (Note that doing this results in a non-portable encoding.) This | |
| 1256 encoding flag is used for byte-compiled files. Note that ESC | |
| 1257 is a good choice for a quoting character because there are no | |
| 1258 escape sequences whose second byte is a character from the Control-0 | |
| 1259 or Control-1 character sets; this is explicitly disallowed by the | |
| 1260 ISO2022 standard. | |
| 1261 | |
| 3025 | 1262 `input-charset-conversion' |
| 428 | 1263 A list of conversion specifications, specifying conversion of |
| 1264 characters in one charset to another when decoding is performed. | |
| 1265 Each specification is a list of two elements: the source charset, | |
| 1266 and the destination charset. | |
| 1267 | |
| 3025 | 1268 `output-charset-conversion' |
| 428 | 1269 A list of conversion specifications, specifying conversion of |
| 1270 characters in one charset to another when encoding is performed. | |
| 1271 The form of each specification is the same as for | |
| 3025 | 1272 `input-charset-conversion'. |
| 428 | 1273 |
| 1274 | |
| 771 | 1275 |
| 428 | 1276 The following additional properties are recognized (and required) |
| 3025 | 1277 if TYPE is `ccl': |
| 1278 | |
| 1279 `decode' | |
| 428 | 1280 CCL program used for decoding (converting to internal format). |
| 1281 | |
| 3025 | 1282 `encode' |
| 428 | 1283 CCL program used for encoding (converting to external format). |
| 771 | 1284 |
| 1285 | |
| 3025 | 1286 The following additional properties are recognized if TYPE is `chain': |
| 1287 | |
| 1288 `chain' | |
| 771 | 1289 List of coding systems to be chained together, in decoding order. |
| 1290 | |
| 3025 | 1291 `canonicalize-after-coding' |
| 771 | 1292 Coding system to be returned by the detector routines in place of |
| 1293 this coding system. | |
| 1294 | |
| 1295 | |
| 1296 | |
| 3025 | 1297 The following additional properties are recognized if TYPE is `unicode': |
| 1298 | |
| 1299 `type' | |
| 771 | 1300 One of `utf-16', `utf-8', `ucs-4', or `utf-7' (the latter is not |
| 1301 yet implemented). `utf-16' is the basic two-byte encoding; | |
| 1302 `ucs-4' is the four-byte encoding; `utf-8' is an ASCII-compatible | |
| 1303 variable-width 8-bit encoding; `utf-7' is a 7-bit encoding using | |
| 1304 only characters that will safely pass through all mail gateways. | |
| 2297 | 1305 [[ This should be \"transformation format\". There should also be |
| 1306 `ucs-2' (or `bmp' -- no surrogates) and `utf-32' (range checked). ]] | |
| 771 | 1307 |
| 3025 | 1308 `little-endian' |
| 771 | 1309 If non-nil, `utf-16' and `ucs-4' will write out the groups of two |
| 1310 or four bytes little-endian instead of big-endian. This is required, | |
| 1311 for example, under Windows. | |
| 1312 | |
| 3025 | 1313 `need-bom' |
| 771 | 1314 If non-nil, a byte order mark (BOM, or Unicode FFFE) should be |
| 1315 written out at the beginning of the data. This serves both to | |
| 1316 identify the endianness of the following data and to mark the | |
| 1317 data as Unicode (at least, this is how Windows uses it). | |
| 2297 | 1318 [[ The correct term is \"signature\", since this technique may also |
| 1319 be used with UTF-8. That is the term used in the standard. ]] | |
| 771 | 1320 |
| 1321 | |
| 1322 The following additional properties are recognized if TYPE is | |
| 3025 | 1323 `mswindows-multibyte': |
| 1324 | |
| 1325 `code-page' | |
| 771 | 1326 Either a number (specifying a particular code page) or one of the |
| 1327 symbols `ansi', `oem', `mac', or `ebcdic', specifying the ANSI, | |
| 1328 OEM, Macintosh, or EBCDIC code page associated with a particular | |
| 1329 locale (given by the `locale' property). NOTE: EBCDIC code pages | |
| 1330 only exist in Windows 2000 and later. | |
| 1331 | |
| 3025 | 1332 `locale' |
| 771 | 1333 If `code-page' is a symbol, this specifies the locale whose code |
| 1334 page of the corresponding type should be used. This should be | |
| 1335 one of the following: A cons of two strings, (LANGUAGE | |
| 1336 . SUBLANGUAGE) (see `mswindows-set-current-locale'); a string (a | |
| 1337 language; SUBLANG_DEFAULT, i.e. the default sublanguage, is | |
| 1338 used); or one of the symbols `current', `user-default', or | |
| 1339 `system-default', corresponding to the values of | |
| 1340 `mswindows-current-locale', `mswindows-user-default-locale', or | |
| 1341 `mswindows-system-default-locale', respectively. | |
| 1342 | |
| 1343 | |
| 1344 | |
| 3025 | 1345 The following additional properties are recognized if TYPE is `undecided': |
| 2297 | 1346 [[ Doesn't GNU use \"detect-*\" for the following two? ]] |
| 771 | 1347 |
| 3025 | 1348 `do-eol' |
| 771 | 1349 Do EOL detection. |
| 1350 | |
| 3025 | 1351 `do-coding' |
| 771 | 1352 Do encoding detection. |
| 1353 | |
| 3025 | 1354 `coding-system' |
| 771 | 1355 If encoding detection is not done, use the specified coding system |
| 1356 to do decoding. This is used internally when implementing coding | |
| 1357 systems with an EOL type that specifies autodetection (the default), | |
| 1358 so that the detector routines return the proper subsidiary. | |
| 1359 | |
| 1360 | |
| 1361 | |
| 3025 | 1362 The following additional property is recognized if TYPE is `gzip': |
| 1363 | |
| 1364 `level' | |
| 771 | 1365 Compression level: 0 through 9, or `default' (currently 6). |
| 1366 | |
| 428 | 1367 */ |
| 771 | 1368 (name, type, description, props)) |
| 428 | 1369 { |
| 771 | 1370 return make_coding_system_1 (name, 0, type, description, props); |
| 428 | 1371 } |
| 1372 | |
| 1373 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /* | |
| 1374 Copy OLD-CODING-SYSTEM to NEW-NAME. | |
| 1375 If NEW-NAME does not name an existing coding system, a new one will | |
| 1376 be created. | |
| 771 | 1377 If you are using this function to create an alias, think again: |
| 1378 Use `define-coding-system-alias' instead. | |
| 428 | 1379 */ |
| 1380 (old_coding_system, new_name)) | |
| 1381 { | |
| 1382 Lisp_Object new_coding_system; | |
| 1383 old_coding_system = Fget_coding_system (old_coding_system); | |
| 771 | 1384 new_coding_system = |
| 1385 UNBOUNDP (new_name) ? Qnil : Ffind_coding_system (new_name); | |
| 428 | 1386 if (NILP (new_coding_system)) |
| 1387 { | |
| 793 | 1388 new_coding_system = |
| 1389 wrap_coding_system | |
| 1390 (allocate_coding_system | |
| 1391 (XCODING_SYSTEM (old_coding_system)->methods, | |
| 1392 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size, | |
| 1393 new_name)); | |
| 771 | 1394 if (!UNBOUNDP (new_name)) |
| 1395 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table); | |
| 428 | 1396 } |
| 771 | 1397 else if (XCODING_SYSTEM (old_coding_system)->methods != |
| 1398 XCODING_SYSTEM (new_coding_system)->methods) | |
| 1399 invalid_operation_2 ("Coding systems not same type", | |
| 1400 old_coding_system, new_coding_system); | |
| 428 | 1401 |
| 1402 { | |
| 1403 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system); | |
| 1404 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system); | |
| 3017 | 1405 COPY_SIZED_LCRECORD (to, from, sizeof_coding_system (from)); |
| 428 | 1406 to->name = new_name; |
| 1407 } | |
| 1408 return new_coding_system; | |
| 1409 } | |
| 1410 | |
| 771 | 1411 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, |
| 1412 1, 1, 0, /* | |
| 440 | 1413 Return t if OBJECT names a coding system, and is not a coding system alias. |
| 428 | 1414 */ |
| 440 | 1415 (object)) |
| 1416 { | |
| 1417 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil)) | |
| 1418 ? Qt : Qnil; | |
| 1419 } | |
| 1420 | |
| 2297 | 1421 /* #### Shouldn't this really be a find/get pair? */ |
| 1422 | |
| 440 | 1423 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /* |
| 1424 Return t if OBJECT is a coding system alias. | |
| 1425 All coding system aliases are created by `define-coding-system-alias'. | |
| 1426 */ | |
| 1427 (object)) | |
| 428 | 1428 { |
| 440 | 1429 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero)) |
| 1430 ? Qt : Qnil; | |
| 1431 } | |
| 1432 | |
| 1433 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /* | |
| 1434 Return the coding-system symbol for which symbol ALIAS is an alias. | |
| 1435 */ | |
| 1436 (alias)) | |
| 1437 { | |
| 1438 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil); | |
| 1439 if (SYMBOLP (aliasee)) | |
| 1440 return aliasee; | |
| 1441 else | |
| 563 | 1442 invalid_argument ("Symbol is not a coding system alias", alias); |
| 1204 | 1443 RETURN_NOT_REACHED (Qnil); |
| 440 | 1444 } |
| 1445 | |
| 1446 /* A maphash function, for removing dangling coding system aliases. */ | |
| 1447 static int | |
| 2286 | 1448 dangling_coding_system_alias_p (Lisp_Object UNUSED (alias), |
| 440 | 1449 Lisp_Object aliasee, |
| 1450 void *dangling_aliases) | |
| 1451 { | |
| 1452 if (SYMBOLP (aliasee) | |
| 1453 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil))) | |
| 428 | 1454 { |
| 440 | 1455 (*(int *) dangling_aliases)++; |
| 1456 return 1; | |
| 428 | 1457 } |
| 440 | 1458 else |
| 1459 return 0; | |
| 1460 } | |
| 1461 | |
| 1462 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /* | |
| 1463 Define symbol ALIAS as an alias for coding system ALIASEE. | |
| 1464 | |
| 1465 You can use this function to redefine an alias that has already been defined, | |
| 1466 but you cannot redefine a name which is the canonical name for a coding system. | |
| 1467 \(a canonical name of a coding system is what is returned when you call | |
| 1468 `coding-system-name' on a coding system). | |
| 1469 | |
| 1470 ALIASEE itself can be an alias, which allows you to define nested aliases. | |
| 1471 | |
| 1472 You are forbidden, however, from creating alias loops or `dangling' aliases. | |
| 1473 These will be detected, and an error will be signaled if you attempt to do so. | |
| 1474 | |
| 1475 If ALIASEE is nil, then ALIAS will simply be undefined. | |
| 1476 | |
| 1477 See also `coding-system-alias-p', `coding-system-aliasee', | |
| 1478 and `coding-system-canonical-name-p'. | |
| 1479 */ | |
| 1480 (alias, aliasee)) | |
| 1481 { | |
| 2286 | 1482 Lisp_Object probe; |
| 440 | 1483 |
| 1484 CHECK_SYMBOL (alias); | |
| 1485 | |
| 1486 if (!NILP (Fcoding_system_canonical_name_p (alias))) | |
| 563 | 1487 invalid_change |
| 440 | 1488 ("Symbol is the canonical name of a coding system and cannot be redefined", |
| 1489 alias); | |
| 1490 | |
| 1491 if (NILP (aliasee)) | |
| 1492 { | |
| 771 | 1493 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix"); |
| 1494 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos"); | |
| 1495 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac"); | |
| 440 | 1496 |
| 1497 Fremhash (alias, Vcoding_system_hash_table); | |
| 1498 | |
| 1499 /* Undefine subsidiary aliases, | |
| 1500 presumably created by a previous call to this function */ | |
| 1501 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) && | |
| 1502 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) && | |
| 1503 ! NILP (Fcoding_system_alias_p (subsidiary_mac))) | |
| 1504 { | |
| 1505 Fdefine_coding_system_alias (subsidiary_unix, Qnil); | |
| 1506 Fdefine_coding_system_alias (subsidiary_dos, Qnil); | |
| 1507 Fdefine_coding_system_alias (subsidiary_mac, Qnil); | |
| 1508 } | |
| 1509 | |
| 1510 /* Undefine dangling coding system aliases. */ | |
| 1511 { | |
| 1512 int dangling_aliases; | |
| 1513 | |
| 1514 do { | |
| 1515 dangling_aliases = 0; | |
| 1516 elisp_map_remhash (dangling_coding_system_alias_p, | |
| 1517 Vcoding_system_hash_table, | |
| 1518 &dangling_aliases); | |
| 1519 } while (dangling_aliases > 0); | |
| 1520 } | |
| 1521 | |
| 1522 return Qnil; | |
| 1523 } | |
| 1524 | |
| 1525 if (CODING_SYSTEMP (aliasee)) | |
| 1526 aliasee = XCODING_SYSTEM_NAME (aliasee); | |
| 1527 | |
| 1528 /* Checks that aliasee names a coding-system */ | |
| 2286 | 1529 (void) Fget_coding_system (aliasee); |
| 440 | 1530 |
| 1531 /* Check for coding system alias loops */ | |
| 1532 if (EQ (alias, aliasee)) | |
| 563 | 1533 alias_loop: invalid_operation_2 |
| 440 | 1534 ("Attempt to create a coding system alias loop", alias, aliasee); |
| 1535 | |
| 1536 for (probe = aliasee; | |
| 1537 SYMBOLP (probe); | |
| 1538 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero)) | |
| 1539 { | |
| 1540 if (EQ (probe, alias)) | |
| 1541 goto alias_loop; | |
| 1542 } | |
| 1543 | |
| 1544 Fputhash (alias, aliasee, Vcoding_system_hash_table); | |
| 1545 | |
| 1546 /* Set up aliases for subsidiaries. | |
| 2297 | 1547 #### There must be a better way to handle subsidiary coding systems. |
| 1548 Inquiring Minds Want To Know: shouldn't they always be chains? */ | |
| 440 | 1549 { |
| 1550 static const char *suffixes[] = { "-unix", "-dos", "-mac" }; | |
| 1551 int i; | |
| 1552 for (i = 0; i < countof (suffixes); i++) | |
| 1553 { | |
| 1554 Lisp_Object alias_subsidiary = | |
| 771 | 1555 add_suffix_to_symbol (alias, suffixes[i]); |
| 440 | 1556 Lisp_Object aliasee_subsidiary = |
| 771 | 1557 add_suffix_to_symbol (aliasee, suffixes[i]); |
| 440 | 1558 |
| 1559 if (! NILP (Ffind_coding_system (aliasee_subsidiary))) | |
| 1560 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary); | |
| 1561 } | |
| 1562 } | |
| 428 | 1563 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac], |
| 1564 but it doesn't look intentional, so I'd rather return something | |
| 1565 meaningful or nothing at all. */ | |
| 1566 return Qnil; | |
| 1567 } | |
| 1568 | |
| 1569 static Lisp_Object | |
| 771 | 1570 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type) |
| 428 | 1571 { |
| 1572 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system); | |
| 1573 Lisp_Object new_coding_system; | |
| 1574 | |
| 1575 switch (type) | |
| 1576 { | |
| 1577 case EOL_AUTODETECT: return coding_system; | |
| 1578 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break; | |
| 1579 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break; | |
| 1580 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break; | |
| 2500 | 1581 default: ABORT (); return Qnil; |
| 428 | 1582 } |
| 1583 | |
| 1584 return NILP (new_coding_system) ? coding_system : new_coding_system; | |
| 1585 } | |
| 1586 | |
| 1587 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /* | |
| 1588 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE. | |
| 771 | 1589 The logically opposite operation is `coding-system-base'. |
| 428 | 1590 */ |
| 1591 (coding_system, eol_type)) | |
| 1592 { | |
| 771 | 1593 coding_system = get_coding_system_for_text_file (coding_system, 0); |
| 428 | 1594 |
| 1595 return subsidiary_coding_system (coding_system, | |
| 1596 symbol_to_eol_type (eol_type)); | |
| 1597 } | |
| 1598 | |
| 771 | 1599 DEFUN ("coding-system-base", Fcoding_system_base, |
| 1600 1, 1, 0, /* | |
| 1601 Return the base coding system of CODING-SYSTEM. | |
| 1602 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it | |
| 1603 returns CODING-SYSTEM. | |
| 1604 The logically opposite operation is `subsidiary-coding-system'. | |
| 1605 */ | |
| 1606 (coding_system)) | |
| 1607 { | |
| 1608 Lisp_Object base; | |
| 1609 | |
| 1610 coding_system = Fget_coding_system (coding_system); | |
| 1611 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary)) | |
| 1612 return Fget_coding_system (Qraw_text); /* hack! */ | |
| 1613 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system); | |
| 1614 if (!NILP (base)) | |
| 1615 return base; | |
| 1616 return coding_system; | |
| 1617 } | |
| 1618 | |
| 1619 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io, | |
| 1620 1, 1, 0, /* | |
| 1621 Return the coding system actually used for I/O. | |
| 1622 In some cases (e.g. when a particular EOL type is specified) this won't be | |
| 2297 | 1623 the coding system itself. This can be useful when trying to determine |
| 1624 precisely how data was decoded. | |
| 771 | 1625 */ |
| 1626 (coding_system)) | |
| 1627 { | |
| 1628 Lisp_Object canon; | |
| 1629 | |
| 1630 coding_system = Fget_coding_system (coding_system); | |
| 1631 canon = XCODING_SYSTEM_CANONICAL (coding_system); | |
| 1632 if (!NILP (canon)) | |
| 1633 return canon; | |
| 1634 return coding_system; | |
| 1635 } | |
| 1636 | |
| 428 | 1637 |
| 1638 /************************************************************************/ | |
| 1639 /* Coding system accessors */ | |
| 1640 /************************************************************************/ | |
| 1641 | |
| 771 | 1642 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /* |
| 1643 Return the description for CODING-SYSTEM. | |
| 1644 The `description' of a coding system is a short English phrase giving the | |
| 1645 name rendered according to English punctuation rules, plus possibly some | |
| 1646 explanatory text (typically in the form of a parenthetical phrase). The | |
| 1647 description is intended to be short enough that it can appear as a menu item, | |
| 1648 and clear enough to be recognizable even to someone who is assumed to have | |
| 1649 some basic familiarity with different encodings but may not know all the | |
| 1650 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and | |
| 1651 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of | |
| 1652 the encoding is given, followed by a note that this is a Chinese encoding, | |
| 1653 because the great majority of people encountering this would have no idea | |
| 1654 what it is, and giving the language indicates whether the encoding should | |
| 1655 just be ignored or (conceivably) investigated more thoroughly. | |
| 428 | 1656 */ |
| 1657 (coding_system)) | |
| 1658 { | |
| 1659 coding_system = Fget_coding_system (coding_system); | |
| 771 | 1660 return XCODING_SYSTEM_DESCRIPTION (coding_system); |
| 428 | 1661 } |
| 1662 | |
| 1663 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /* | |
| 1664 Return the type of CODING-SYSTEM. | |
| 1665 */ | |
| 1666 (coding_system)) | |
| 1667 { | |
| 771 | 1668 coding_system = Fget_coding_system (coding_system); |
| 1669 return XCODING_SYSTEM_TYPE (coding_system); | |
| 428 | 1670 } |
| 1671 | |
| 1672 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /* | |
| 1673 Return the PROP property of CODING-SYSTEM. | |
| 1674 */ | |
| 1675 (coding_system, prop)) | |
| 1676 { | |
| 1677 coding_system = Fget_coding_system (coding_system); | |
| 1678 CHECK_SYMBOL (prop); | |
| 1679 | |
| 1680 if (EQ (prop, Qname)) | |
| 1681 return XCODING_SYSTEM_NAME (coding_system); | |
| 1682 else if (EQ (prop, Qtype)) | |
| 1683 return Fcoding_system_type (coding_system); | |
| 771 | 1684 else if (EQ (prop, Qdescription)) |
| 1685 return XCODING_SYSTEM_DESCRIPTION (coding_system); | |
| 428 | 1686 else if (EQ (prop, Qmnemonic)) |
| 1687 return XCODING_SYSTEM_MNEMONIC (coding_system); | |
| 771 | 1688 else if (EQ (prop, Qdocumentation)) |
| 1689 return XCODING_SYSTEM_DOCUMENTATION (coding_system); | |
| 428 | 1690 else if (EQ (prop, Qeol_type)) |
| 771 | 1691 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE |
| 1692 (coding_system)); | |
| 428 | 1693 else if (EQ (prop, Qeol_lf)) |
| 1694 return XCODING_SYSTEM_EOL_LF (coding_system); | |
| 1695 else if (EQ (prop, Qeol_crlf)) | |
| 1696 return XCODING_SYSTEM_EOL_CRLF (coding_system); | |
| 1697 else if (EQ (prop, Qeol_cr)) | |
| 1698 return XCODING_SYSTEM_EOL_CR (coding_system); | |
| 1699 else if (EQ (prop, Qpost_read_conversion)) | |
| 1700 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system); | |
| 1701 else if (EQ (prop, Qpre_write_conversion)) | |
| 1702 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system); | |
| 771 | 1703 else |
| 1704 { | |
| 1705 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system), | |
| 1706 getprop, | |
| 1707 (coding_system, prop), | |
| 1708 Qunbound); | |
| 1709 if (UNBOUNDP (value)) | |
| 1710 invalid_constant ("Unrecognized property", prop); | |
| 1711 return value; | |
| 1712 } | |
| 1713 } | |
| 1714 | |
| 1715 | |
| 1716 /************************************************************************/ | |
| 1717 /* Coding stream functions */ | |
| 1718 /************************************************************************/ | |
| 1719 | |
| 1720 /* A coding stream is a stream used for encoding or decoding text. The | |
| 1721 coding-stream object keeps track of the actual coding system, the stream | |
| 1722 that is at the other end, and data that needs to be persistent across | |
| 1723 the lifetime of the stream. */ | |
| 1724 | |
| 1204 | 1725 extern const struct sized_memory_description chain_coding_stream_description; |
| 1726 extern const struct sized_memory_description undecided_coding_stream_description; | |
| 1727 | |
| 1728 static const struct memory_description coding_stream_data_description_1 []= { | |
| 2551 | 1729 { XD_BLOCK_PTR, chain_coding_system, 1, |
| 1730 { &chain_coding_stream_description } }, | |
| 1731 { XD_BLOCK_PTR, undecided_coding_system, 1, | |
| 1732 { &undecided_coding_stream_description } }, | |
| 1204 | 1733 { XD_END } |
| 1734 }; | |
| 1735 | |
| 1736 static const struct sized_memory_description coding_stream_data_description = { | |
| 1737 sizeof (void *), coding_stream_data_description_1 | |
| 1738 }; | |
| 1739 | |
| 1740 static const struct memory_description coding_lstream_description[] = { | |
| 1741 { XD_INT, offsetof (struct coding_stream, type) }, | |
| 1742 { XD_LISP_OBJECT, offsetof (struct coding_stream, orig_codesys) }, | |
| 1743 { XD_LISP_OBJECT, offsetof (struct coding_stream, codesys) }, | |
| 1744 { XD_LISP_OBJECT, offsetof (struct coding_stream, other_end) }, | |
| 1745 { XD_UNION, offsetof (struct coding_stream, data), | |
| 2551 | 1746 XD_INDIRECT (0, 0), { &coding_stream_data_description } }, |
| 1204 | 1747 { XD_END } |
| 1748 }; | |
| 1749 | |
| 1750 DEFINE_LSTREAM_IMPLEMENTATION_WITH_DATA ("coding", coding); | |
| 771 | 1751 |
| 1752 /* Encoding and decoding are parallel operations, so we create just one | |
| 1753 stream for both. "Decoding" may involve the extra step of autodetection | |
| 1754 of the data format, but that's only because of the conventional | |
| 1755 definition of decoding as converting from external- to | |
| 1756 internal-formatted data. | |
| 1757 | |
| 2297 | 1758 [[ REWRITE ME! ]] |
| 1759 | |
| 771 | 1760 #### We really need to abstract out the concept of "data formats" and |
| 1761 define "converters" that convert from and to specified formats, | |
| 1762 eliminating the idea of decoding and encoding. When specifying a | |
| 1763 conversion process, we need to give the data formats themselves, not the | |
| 1764 conversion processes -- e.g. a coding system called "Unicode->multibyte" | |
| 1765 converts in both directions, and we could auto-detect the format of data | |
| 1766 at either end. */ | |
| 1767 | |
| 1768 static Bytecount | |
| 1769 coding_reader (Lstream *stream, unsigned char *data, Bytecount size) | |
| 1770 { | |
| 1771 unsigned char *orig_data = data; | |
| 1772 Bytecount read_size; | |
| 1773 int error_occurred = 0; | |
| 1774 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1775 | |
| 1776 /* We need to interface to coding_{de,en}code_1(), which expects to take | |
| 1777 some amount of data and store the result into a Dynarr. We have | |
| 1778 coding_{de,en}code_1() store into c->runoff, and take data from there | |
| 1779 as necessary. */ | |
| 1780 | |
| 1781 /* We loop until we have enough data, reading chunks from the other | |
| 1782 end and converting it. */ | |
| 1783 while (1) | |
| 1784 { | |
| 1785 /* Take data from convert_to if we can. Make sure to take at | |
| 1786 most SIZE bytes, and delete the data from convert_to. */ | |
| 1787 if (Dynarr_length (str->convert_to) > 0) | |
| 1788 { | |
| 1789 Bytecount chunk = | |
| 1790 min (size, (Bytecount) Dynarr_length (str->convert_to)); | |
| 1791 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk); | |
| 1792 Dynarr_delete_many (str->convert_to, 0, chunk); | |
| 1793 data += chunk; | |
| 1794 size -= chunk; | |
| 1795 } | |
| 1796 | |
| 1797 if (size == 0) | |
| 1798 break; /* No more room for data */ | |
| 1799 | |
| 1800 if (str->eof) | |
| 1801 break; | |
| 1802 | |
| 1803 { | |
| 1804 /* Exhausted convert_to, so get some more. Read into convert_from, | |
| 1805 after existing "rejected" data from the last conversion. */ | |
| 1806 Bytecount rejected = Dynarr_length (str->convert_from); | |
| 1807 /* #### 1024 is arbitrary; we really need to separate 0 from EOF, | |
| 1808 and when we get 0, keep taking more data until we don't get 0 -- | |
| 1809 we don't know how much data the conversion routine might need | |
| 2297 | 1810 before it can generate any data of its own (eg, bzip2). */ |
| 814 | 1811 Bytecount readmore = |
| 1812 str->one_byte_at_a_time ? (Bytecount) 1 : | |
| 1813 max (size, (Bytecount) 1024); | |
| 771 | 1814 |
| 1815 Dynarr_add_many (str->convert_from, 0, readmore); | |
| 1816 read_size = Lstream_read (str->other_end, | |
| 1817 Dynarr_atp (str->convert_from, rejected), | |
| 1818 readmore); | |
| 1819 /* Trim size down to how much we actually got */ | |
| 1820 Dynarr_set_size (str->convert_from, rejected + max (0, read_size)); | |
| 1821 } | |
| 1822 | |
| 1823 if (read_size < 0) /* LSTREAM_ERROR */ | |
| 1824 { | |
| 1825 error_occurred = 1; | |
| 1826 break; | |
| 1827 } | |
| 1828 if (read_size == 0) /* LSTREAM_EOF */ | |
| 1829 /* There might be some more end data produced in the translation, | |
| 1830 so we set a flag and call the conversion method once more to | |
| 1831 output any final stuff it may be holding, any "go back to a sane | |
| 1832 state" escape sequences, etc. The conversion method is free to | |
| 1833 look at this flag, and we use it above to stop looping. */ | |
| 1834 str->eof = 1; | |
| 1835 { | |
| 1836 Bytecount processed; | |
| 1837 Bytecount to_process = Dynarr_length (str->convert_from); | |
| 1838 | |
| 1839 /* Convert the data, and save any rejected data in convert_from */ | |
| 1840 processed = | |
| 1841 XCODESYSMETH (str->codesys, convert, | |
| 1842 (str, Dynarr_atp (str->convert_from, 0), | |
| 1843 str->convert_to, to_process)); | |
| 1844 if (processed < 0) | |
| 1845 { | |
| 1846 error_occurred = 1; | |
| 1847 break; | |
| 1848 } | |
| 1849 assert (processed <= to_process); | |
| 1850 if (processed < to_process) | |
| 1851 memmove (Dynarr_atp (str->convert_from, 0), | |
| 1852 Dynarr_atp (str->convert_from, processed), | |
| 1853 to_process - processed); | |
| 1854 Dynarr_set_size (str->convert_from, to_process - processed); | |
| 1855 } | |
| 1856 } | |
| 1857 | |
| 1858 if (data - orig_data == 0) | |
| 1859 return error_occurred ? -1 : 0; | |
| 1860 else | |
| 1861 return data - orig_data; | |
| 1862 } | |
| 1863 | |
| 1864 static Bytecount | |
| 1865 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size) | |
| 1866 { | |
| 1867 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1868 | |
| 1869 /* Convert all our data into convert_to, and then attempt to write | |
| 1870 it all out to the other end. */ | |
| 1871 Dynarr_reset (str->convert_to); | |
| 1872 size = XCODESYSMETH (str->codesys, convert, | |
| 1873 (str, data, str->convert_to, size)); | |
| 1874 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0), | |
| 1875 Dynarr_length (str->convert_to)) < 0) | |
| 1876 return -1; | |
| 1877 else | |
| 1878 /* The return value indicates how much of the incoming data was | |
| 1879 processed, not how many bytes were written. */ | |
| 1880 return size; | |
| 1881 } | |
| 1882 | |
| 1883 static int | |
| 1884 encode_decode_source_sink_type_is_char (Lisp_Object cs, | |
| 1885 enum source_or_sink sex, | |
| 1886 enum encode_decode direction) | |
| 1887 { | |
| 1888 return (direction == CODING_DECODE ? | |
| 1889 decoding_source_sink_type_is_char (cs, sex) : | |
| 1890 encoding_source_sink_type_is_char (cs, sex)); | |
| 1891 } | |
| 1892 | |
| 1893 /* Ensure that the convert methods only get full characters sent to them to | |
| 1894 convert if the source of that conversion is characters; and that no such | |
| 1895 full-character checking happens when the source is bytes. Keep in mind | |
| 1896 that (1) the conversion_end_type return values take the perspective of | |
| 1897 encoding; (2) the source for decoding is the same as the sink for | |
| 1898 encoding; (3) when writing, the data is given to us, and we set our own | |
| 1899 stream to be character mode or not; (4) when reading, the data comes | |
| 1900 from the other_end stream, and we set that one to be character mode or | |
| 1901 not. This is consistent with the comment above the prototype for | |
| 1902 Lstream_set_character_mode(), which lays out rules for who is allowed to | |
| 1903 modify the character type mode on a stream. | |
| 1904 | |
| 814 | 1905 If we're a read stream, we're always setting character mode on the |
| 1906 source, but we also set it on ourselves consistent with the flag that | |
| 1907 can disable this (see again the comment above | |
| 1908 Lstream_set_character_mode()). | |
| 1909 */ | |
| 771 | 1910 |
| 1911 static void | |
| 1912 set_coding_character_mode (Lstream *stream) | |
| 1913 { | |
| 1914 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1915 Lstream *stream_to_set = | |
| 1916 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end; | |
| 1917 if (encode_decode_source_sink_type_is_char | |
| 1918 (str->codesys, CODING_SOURCE, str->direction)) | |
| 1919 Lstream_set_character_mode (stream_to_set); | |
| 1920 else | |
| 1921 Lstream_unset_character_mode (stream_to_set); | |
| 814 | 1922 if (str->set_char_mode_on_us_when_reading && |
| 1923 (stream->flags & LSTREAM_FL_READ)) | |
| 1924 { | |
| 1925 if (encode_decode_source_sink_type_is_char | |
| 1926 (str->codesys, CODING_SINK, str->direction)) | |
| 1927 Lstream_set_character_mode (stream); | |
| 1928 else | |
| 1929 Lstream_unset_character_mode (stream); | |
| 1930 } | |
| 771 | 1931 } |
| 1932 | |
| 1933 static Lisp_Object | |
| 1934 coding_marker (Lisp_Object stream) | |
| 1935 { | |
| 1936 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream)); | |
| 1937 | |
| 1938 mark_object (str->orig_codesys); | |
| 1939 mark_object (str->codesys); | |
| 1940 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str)); | |
| 1941 return wrap_lstream (str->other_end); | |
| 1942 } | |
| 1943 | |
| 1944 static int | |
| 1945 coding_rewinder (Lstream *stream) | |
| 1946 { | |
| 1947 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1948 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str)); | |
| 1949 | |
| 1950 str->ch = 0; | |
| 1951 Dynarr_reset (str->convert_to); | |
| 1952 Dynarr_reset (str->convert_from); | |
| 1953 return Lstream_rewind (str->other_end); | |
| 1954 } | |
| 1955 | |
| 1956 static int | |
| 1957 coding_seekable_p (Lstream *stream) | |
| 1958 { | |
| 1959 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1960 return Lstream_seekable_p (str->other_end); | |
| 1961 } | |
| 1962 | |
| 1963 static int | |
| 1964 coding_flusher (Lstream *stream) | |
| 1965 { | |
| 1966 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1967 return Lstream_flush (str->other_end); | |
| 1968 } | |
| 1969 | |
| 1970 static int | |
| 1971 coding_closer (Lstream *stream) | |
| 1972 { | |
| 1973 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 1974 if (stream->flags & LSTREAM_FL_WRITE) | |
| 1975 { | |
| 1976 str->eof = 1; | |
| 1977 coding_writer (stream, 0, 0); | |
| 1978 str->eof = 0; | |
| 1979 } | |
| 1980 /* It's safe to free the runoff dynarrs now because they are used only | |
| 1981 during conversion. We need to keep the type-specific data around, | |
| 1982 though, because of canonicalize_after_coding. */ | |
| 1983 if (str->convert_to) | |
| 1984 { | |
| 1985 Dynarr_free (str->convert_to); | |
| 1986 str->convert_to = 0; | |
| 1987 } | |
| 1988 if (str->convert_from) | |
| 428 | 1989 { |
| 771 | 1990 Dynarr_free (str->convert_from); |
| 1991 str->convert_from = 0; | |
| 1992 } | |
| 1993 | |
| 800 | 1994 if (str->no_close_other) |
| 1995 return Lstream_flush (str->other_end); | |
| 1996 else | |
| 1997 return Lstream_close (str->other_end); | |
| 771 | 1998 } |
| 1999 | |
| 2000 static void | |
| 2001 coding_finalizer (Lstream *stream) | |
| 2002 { | |
| 2003 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2004 | |
| 2005 assert (!str->finalized); | |
| 2006 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2007 if (str->data) | |
| 2008 { | |
| 1726 | 2009 xfree (str->data, void *); |
| 771 | 2010 str->data = 0; |
| 2011 } | |
| 2012 str->finalized = 1; | |
| 2013 } | |
| 2014 | |
| 2015 static Lisp_Object | |
| 2016 coding_stream_canonicalize_after_coding (Lstream *stream) | |
| 2017 { | |
| 2018 struct coding_stream *str = CODING_STREAM_DATA (stream); | |
| 2019 | |
| 2020 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding, | |
| 2021 (str), str->codesys); | |
| 2022 } | |
| 2023 | |
| 2024 Lisp_Object | |
| 2025 coding_stream_detected_coding_system (Lstream *stream) | |
| 2026 { | |
| 2027 Lisp_Object codesys = | |
| 2028 coding_stream_canonicalize_after_coding (stream); | |
| 2029 if (NILP (codesys)) | |
| 2030 return Fget_coding_system (Qidentity); | |
| 2031 return codesys; | |
| 2032 } | |
| 2033 | |
| 2034 Lisp_Object | |
| 2035 coding_stream_coding_system (Lstream *stream) | |
| 2036 { | |
| 2037 return CODING_STREAM_DATA (stream)->codesys; | |
| 2038 } | |
| 2039 | |
| 2040 /* Change the coding system associated with a stream. */ | |
| 2041 | |
| 2042 void | |
| 2043 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys) | |
| 2044 { | |
| 2045 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2046 if (EQ (str->orig_codesys, codesys)) | |
| 2047 return; | |
| 2048 /* We do the equivalent of closing the stream, destroying it, and | |
| 2049 reinitializing it. This includes flushing out the data and signalling | |
| 2050 EOF, if we're a writing stream; we also replace the type-specific data | |
| 2051 with the data appropriate for the new coding system. */ | |
| 2052 if (!NILP (str->codesys)) | |
| 2053 { | |
| 2054 if (lstr->flags & LSTREAM_FL_WRITE) | |
| 2055 { | |
| 2056 Lstream_flush (lstr); | |
| 2057 str->eof = 1; | |
| 2058 coding_writer (lstr, 0, 0); | |
| 2059 str->eof = 0; | |
| 2060 } | |
| 2061 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str)); | |
| 2062 } | |
| 2063 str->orig_codesys = codesys; | |
| 2064 str->codesys = coding_system_real_canonical (codesys); | |
| 2065 | |
| 2066 if (str->data) | |
| 2067 { | |
| 1726 | 2068 xfree (str->data, void *); |
| 771 | 2069 str->data = 0; |
| 428 | 2070 } |
| 771 | 2071 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size) |
| 1204 | 2072 { |
| 2073 str->data = | |
| 2074 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)-> | |
| 2075 coding_data_size); | |
| 2076 str->type = XCODING_SYSTEM_METHODS (str->codesys)->enumtype; | |
| 2077 } | |
| 771 | 2078 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str)); |
| 2079 /* The new coding system may have different ideas regarding whether its | |
| 2080 ends are characters or bytes. */ | |
| 2081 set_coding_character_mode (lstr); | |
| 2082 } | |
| 2083 | |
| 2084 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding | |
| 2085 stream for writing, no automatic code detection will be performed. | |
| 2086 The reason for this is that automatic code detection requires a | |
| 2087 seekable input. Things will also fail if you open a coding | |
| 2088 stream for reading using a non-fully-specified coding system and | |
| 2089 a non-seekable input stream. */ | |
| 2090 | |
| 2091 static Lisp_Object | |
| 2092 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys, | |
| 800 | 2093 const char *mode, enum encode_decode direction, |
| 802 | 2094 int flags) |
| 771 | 2095 { |
| 2096 Lstream *lstr = Lstream_new (lstream_coding, mode); | |
| 2097 struct coding_stream *str = CODING_STREAM_DATA (lstr); | |
| 2098 | |
| 2099 codesys = Fget_coding_system (codesys); | |
| 2100 xzero (*str); | |
| 2101 str->codesys = Qnil; | |
| 2102 str->orig_codesys = Qnil; | |
| 2103 str->us = lstr; | |
| 2104 str->other_end = stream; | |
| 2105 str->convert_to = Dynarr_new (unsigned_char); | |
| 2106 str->convert_from = Dynarr_new (unsigned_char); | |
| 2107 str->direction = direction; | |
| 814 | 2108 if (flags & LSTREAM_FL_NO_CLOSE_OTHER) |
| 802 | 2109 str->no_close_other = 1; |
| 814 | 2110 if (flags & LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME) |
| 802 | 2111 str->one_byte_at_a_time = 1; |
| 814 | 2112 if (!(flags & LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING)) |
| 2113 str->set_char_mode_on_us_when_reading = 1; | |
| 802 | 2114 |
| 771 | 2115 set_coding_stream_coding_system (lstr, codesys); |
| 793 | 2116 return wrap_lstream (lstr); |
| 771 | 2117 } |
| 2118 | |
| 814 | 2119 /* FLAGS: |
| 2120 | |
| 2121 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2122 Don't close STREAM (the stream at the other end) when this stream is | |
| 2123 closed. | |
| 2124 | |
| 2125 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME | |
| 2126 When reading from STREAM, read and process one byte at a time rather | |
| 2127 than in large chunks. This is for reading from TTY's, so we don't | |
| 2128 block. #### We should instead create a non-blocking filedesc stream | |
| 2129 that emulates the behavior as necessary using select(), when the | |
| 2130 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2131 | |
| 2132 LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING | |
| 2133 When reading from STREAM, read and process one byte at a time rather | |
| 2134 than in large chunks. This is for reading from TTY's, so we don't | |
| 2135 block. #### We should instead create a non-blocking filedesc stream | |
| 2136 that emulates the behavior as necessary using select(), when the | |
| 2137 fcntls don't work. (As seems to be the case on Cygwin.) | |
| 2138 */ | |
| 771 | 2139 Lisp_Object |
| 2140 make_coding_input_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2141 enum encode_decode direction, int flags) |
| 771 | 2142 { |
| 800 | 2143 return make_coding_stream_1 (stream, codesys, "r", direction, |
| 802 | 2144 flags); |
| 771 | 2145 } |
| 2146 | |
| 814 | 2147 /* FLAGS: |
| 2148 | |
| 2149 LSTREAM_FL_NO_CLOSE_OTHER | |
| 2150 Don't close STREAM (the stream at the other end) when this stream is | |
| 2151 closed. | |
| 2152 */ | |
| 771 | 2153 Lisp_Object |
| 2154 make_coding_output_stream (Lstream *stream, Lisp_Object codesys, | |
| 802 | 2155 enum encode_decode direction, int flags) |
| 771 | 2156 { |
| 800 | 2157 return make_coding_stream_1 (stream, codesys, "w", direction, |
| 802 | 2158 flags); |
| 771 | 2159 } |
| 2160 | |
| 2161 static Lisp_Object | |
| 2162 encode_decode_coding_region (Lisp_Object start, Lisp_Object end, | |
| 2163 Lisp_Object coding_system, Lisp_Object buffer, | |
| 2164 enum encode_decode direction) | |
| 2165 { | |
| 2166 Charbpos b, e; | |
| 2167 struct buffer *buf = decode_buffer (buffer, 0); | |
| 2168 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil; | |
| 2169 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil; | |
| 2170 Lisp_Object lb_outstream = Qnil; | |
| 2171 Lisp_Object next; | |
| 2172 Lstream *istr, *ostr; | |
| 2173 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
| 2174 struct gcpro ngcpro1; | |
| 2175 int source_char, sink_char; | |
| 2176 | |
| 2177 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 2178 barf_if_buffer_read_only (buf, b, e); | |
| 2179 | |
| 2180 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream); | |
| 2181 NGCPRO1 (auto_outstream); | |
| 2182 | |
| 2183 coding_system = Fget_coding_system (coding_system); | |
| 2184 source_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2185 CODING_SOURCE, | |
| 2186 direction); | |
| 2187 sink_char = encode_decode_source_sink_type_is_char (coding_system, | |
| 2188 CODING_SINK, | |
| 2189 direction); | |
| 2190 | |
| 2191 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */ | |
| 2192 instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 2193 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0); | |
| 2194 | |
| 2195 if (direction == CODING_DECODE && | |
| 2196 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT) | |
| 2197 next = auto_outstream = | |
| 2198 make_coding_output_stream | |
| 800 | 2199 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect), |
| 2200 CODING_DECODE, 0); | |
| 771 | 2201 |
| 2202 if (!sink_char) | |
| 2203 next = from_outstream = | |
| 800 | 2204 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0); |
| 771 | 2205 outstream = make_coding_output_stream (XLSTREAM (next), coding_system, |
| 800 | 2206 direction, 0); |
| 771 | 2207 if (!source_char) |
| 428 | 2208 { |
| 771 | 2209 to_outstream = |
| 2210 make_coding_output_stream (XLSTREAM (outstream), | |
| 800 | 2211 Qbinary, CODING_ENCODE, 0); |
| 771 | 2212 ostr = XLSTREAM (to_outstream); |
| 2213 } | |
| 2214 else | |
| 2215 ostr = XLSTREAM (outstream); | |
| 2216 istr = XLSTREAM (instream); | |
| 2217 | |
| 2218 /* The chain of streams looks like this: | |
| 2219 | |
| 2297 | 2220 [BUFFER] <----- (( read from/send to loop )) |
| 771 | 2221 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is |
| 2222 in bytes] | |
| 2223 ------> [ENCODE/DECODE AS SPECIFIED] | |
| 2224 ------> [BYTE->CHAR i.e. DECODE AS BINARY | |
| 2225 if sink is in bytes] | |
| 2226 ------> [AUTODETECT EOL if | |
| 2227 we're decoding and | |
| 2228 coding system calls | |
| 2229 for this] | |
| 2230 ------> [BUFFER] | |
| 2231 */ | |
| 2367 | 2232 |
| 2233 /* #### See comment | |
| 2234 | |
| 2235 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS | |
| 2236 | |
| 2237 in text.c. | |
| 2238 */ | |
| 2239 | |
| 771 | 2240 while (1) |
| 2241 { | |
| 2242 char tempbuf[1024]; /* some random amount */ | |
| 2243 Charbpos newpos, even_newer_pos; | |
| 2244 Charbpos oldpos = lisp_buffer_stream_startpos (istr); | |
| 2245 Bytecount size_in_bytes = | |
| 2246 Lstream_read (istr, tempbuf, sizeof (tempbuf)); | |
| 2247 | |
| 2248 if (!size_in_bytes) | |
| 2249 break; | |
| 2250 newpos = lisp_buffer_stream_startpos (istr); | |
| 2251 Lstream_write (ostr, tempbuf, size_in_bytes); | |
| 2252 even_newer_pos = lisp_buffer_stream_startpos (istr); | |
| 2253 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos), | |
| 2254 even_newer_pos, 0); | |
| 428 | 2255 } |
| 771 | 2256 |
| 2257 { | |
| 2258 Charcount retlen = | |
| 2259 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b; | |
| 2260 Lstream_close (istr); | |
| 2261 Lstream_close (ostr); | |
| 2262 NUNGCPRO; | |
| 2263 UNGCPRO; | |
| 2264 Lstream_delete (istr); | |
| 2265 if (!NILP (from_outstream)) | |
| 2266 Lstream_delete (XLSTREAM (from_outstream)); | |
| 2267 Lstream_delete (XLSTREAM (outstream)); | |
| 2268 if (!NILP (to_outstream)) | |
| 2269 Lstream_delete (XLSTREAM (to_outstream)); | |
| 2270 if (!NILP (auto_outstream)) | |
| 2271 Lstream_delete (XLSTREAM (auto_outstream)); | |
| 2272 Lstream_delete (XLSTREAM (lb_outstream)); | |
| 2273 return make_int (retlen); | |
| 2274 } | |
| 2275 } | |
| 2276 | |
| 2277 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /* | |
| 2278 Decode the text between START and END which is encoded in CODING-SYSTEM. | |
| 2279 This is useful if you've read in encoded text from a file without decoding | |
| 2280 it (e.g. you read in a JIS-formatted file but used the `binary' or | |
| 2281 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B"). | |
| 2282 Return length of decoded text. | |
| 2283 BUFFER defaults to the current buffer if unspecified. | |
| 2284 */ | |
| 2285 (start, end, coding_system, buffer)) | |
| 2286 { | |
| 2287 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2288 CODING_DECODE); | |
| 2289 } | |
| 2290 | |
| 2291 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /* | |
| 2292 Encode the text between START and END using CODING-SYSTEM. | |
| 2293 This will, for example, convert Japanese characters into stuff such as | |
| 2294 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded | |
| 2295 text. BUFFER defaults to the current buffer if unspecified. | |
| 2296 */ | |
| 2297 (start, end, coding_system, buffer)) | |
| 2298 { | |
| 2299 return encode_decode_coding_region (start, end, coding_system, buffer, | |
| 2300 CODING_ENCODE); | |
| 428 | 2301 } |
| 2302 | |
| 2303 | |
| 2304 /************************************************************************/ | |
| 771 | 2305 /* Chain methods */ |
| 428 | 2306 /************************************************************************/ |
| 2307 | |
| 771 | 2308 /* #### Need a way to create "opposite-direction" coding systems. */ |
| 2309 | |
| 2310 /* Chain two or more coding systems together to make a combination coding | |
| 2311 system. */ | |
| 2312 | |
| 2313 struct chain_coding_system | |
| 2314 { | |
| 2315 /* List of coding systems, in decode order */ | |
| 2316 Lisp_Object *chain; | |
| 2317 /* Number of coding systems in list */ | |
| 2318 int count; | |
| 2319 /* Coding system to return as a result of canonicalize-after-coding */ | |
| 2320 Lisp_Object canonicalize_after_coding; | |
| 2321 }; | |
| 2322 | |
| 2323 struct chain_coding_stream | |
| 2324 { | |
| 2325 int initted; | |
| 2326 /* Lstreams for chain coding system */ | |
| 2327 Lisp_Object *lstreams; | |
| 2328 int lstream_count; | |
| 2329 }; | |
| 2330 | |
| 1204 | 2331 static const struct memory_description chain_coding_system_description[] = { |
| 2332 { XD_INT, offsetof (struct chain_coding_system, count) }, | |
| 2367 | 2333 { XD_BLOCK_PTR, offsetof (struct chain_coding_system, chain), |
| 2551 | 2334 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 1204 | 2335 { XD_LISP_OBJECT, offsetof (struct chain_coding_system, |
| 2336 canonicalize_after_coding) }, | |
| 771 | 2337 { XD_END } |
| 2338 }; | |
| 2339 | |
| 1204 | 2340 static const struct memory_description chain_coding_stream_description_1 [] = { |
| 2341 { XD_INT, offsetof (struct chain_coding_stream, lstream_count) }, | |
| 2367 | 2342 { XD_BLOCK_PTR, offsetof (struct chain_coding_stream, lstreams), |
| 2551 | 2343 XD_INDIRECT (0, 0), { &lisp_object_description } }, |
| 771 | 2344 { XD_END } |
| 2345 }; | |
| 2346 | |
| 1204 | 2347 const struct sized_memory_description chain_coding_stream_description = { |
| 2348 sizeof (struct chain_coding_stream), chain_coding_stream_description_1 | |
| 2349 }; | |
| 2350 | |
| 2351 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (chain); | |
| 2352 | |
| 771 | 2353 static Lisp_Object |
| 2354 chain_canonicalize (Lisp_Object codesys) | |
| 2355 { | |
| 2356 /* We make use of the fact that this method is called at init time, after | |
| 2357 properties have been parsed. init_method is called too early. */ | |
| 2358 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2359 any more. */ | |
| 2360 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys), | |
| 2361 XCODING_SYSTEM_CHAIN_CHAIN (codesys)); | |
| 2362 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys), | |
| 2363 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys), | |
| 2364 chain)); | |
| 2365 Fputhash (chain, codesys, Vchain_canonicalize_hash_table); | |
| 2366 return codesys; | |
| 2367 } | |
| 2368 | |
| 2369 static Lisp_Object | |
| 2370 chain_canonicalize_after_coding (struct coding_stream *str) | |
| 2371 { | |
| 2372 Lisp_Object cac = | |
| 2373 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys); | |
| 2374 if (!NILP (cac)) | |
| 2375 return cac; | |
| 2376 return str->codesys; | |
| 2377 #if 0 | |
| 2378 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2379 Lisp_Object us = str->codesys, codesys; | |
| 2380 int i; | |
| 2381 Lisp_Object chain; | |
| 2382 Lisp_Object tail; | |
| 2383 int changed = 0; | |
| 2384 | |
| 2385 /* #### It's not clear we need this whole chain-canonicalize mechanism | |
| 2386 any more. */ | |
| 2387 if (str->direction == CODING_ENCODE || !data->initted) | |
| 2388 return us; | |
| 2389 | |
| 2390 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us), | |
| 2391 XCODING_SYSTEM_CHAIN_CHAIN (us)); | |
| 2392 | |
| 2393 tail = chain; | |
| 2394 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++) | |
| 2395 { | |
| 2396 codesys = (coding_stream_canonicalize_after_coding | |
| 2397 (XLSTREAM (data->lstreams[i]))); | |
| 2398 if (!EQ (codesys, XCAR (tail))) | |
| 2399 changed = 1; | |
| 2400 XCAR (tail) = codesys; | |
| 2401 tail = XCDR (tail); | |
| 2402 } | |
| 2403 | |
| 2404 if (!changed) | |
| 2405 return us; | |
| 2406 | |
| 2407 chain = delq_no_quit (Qnil, chain); | |
| 2408 | |
| 2409 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) && | |
| 2410 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us))) | |
| 2411 { | |
| 2412 if (NILP (chain)) | |
| 2413 return Qnil; | |
| 2414 if (NILP (XCDR (chain))) | |
| 2415 return XCAR (chain); | |
| 2416 } | |
| 2417 | |
| 2418 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us), | |
| 2419 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us), | |
| 2420 chain)), Vchain_canonicalize_hash_table, | |
| 2421 Qnil); | |
| 2422 if (!NILP (codesys)) | |
| 2423 return codesys; | |
| 2424 return make_internal_coding_system | |
| 2425 (us, "internal-chain-canonicalizer-wrapper", | |
| 2426 Qchain, Qunbound, list2 (Qchain, chain)); | |
| 2427 #endif /* 0 */ | |
| 2428 } | |
| 2429 | |
| 2430 static void | |
| 2431 chain_init (Lisp_Object codesys) | |
| 2432 { | |
| 2433 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil; | |
| 2434 } | |
| 2435 | |
| 2436 static void | |
| 2437 chain_mark (Lisp_Object codesys) | |
| 2438 { | |
| 2439 int i; | |
| 2440 | |
| 2441 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++) | |
| 2442 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]); | |
| 2443 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys)); | |
| 2444 } | |
| 2445 | |
| 2446 static void | |
| 2447 chain_mark_coding_stream_1 (struct chain_coding_stream *data) | |
| 2448 { | |
| 2449 int i; | |
| 2450 | |
| 2451 for (i = 0; i < data->lstream_count; i++) | |
| 2452 mark_object (data->lstreams[i]); | |
| 2453 } | |
| 2454 | |
| 2455 static void | |
| 2456 chain_mark_coding_stream (struct coding_stream *str) | |
| 2457 { | |
| 2458 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2459 } | |
| 2460 | |
| 2461 static void | |
| 2462 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 2463 { | |
| 2464 int i; | |
| 2465 | |
| 826 | 2466 write_c_string (printcharfun, "("); |
| 771 | 2467 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++) |
| 2468 { | |
| 826 | 2469 write_c_string (printcharfun, i == 0 ? "" : "->"); |
| 771 | 2470 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i], |
| 2471 printcharfun, escapeflag); | |
| 2472 } | |
| 2473 { | |
| 2474 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs); | |
| 2475 if (!NILP (cac)) | |
| 2476 { | |
| 2477 if (i > 0) | |
| 826 | 2478 write_c_string (printcharfun, " "); |
| 2479 write_c_string (printcharfun, "canonicalize-after-coding="); | |
| 771 | 2480 print_coding_system_in_print_method (cac, printcharfun, escapeflag); |
| 2481 } | |
| 2482 } | |
| 2483 | |
| 826 | 2484 write_c_string (printcharfun, ")"); |
| 771 | 2485 } |
| 2486 | |
| 2487 static void | |
| 2488 chain_rewind_coding_stream_1 (struct chain_coding_stream *data) | |
| 2489 { | |
| 2490 /* Each will rewind the next; there is always at least one stream (the | |
| 2491 dynarr stream at the end) if we're initted */ | |
| 2492 if (data->initted) | |
| 2493 Lstream_rewind (XLSTREAM (data->lstreams[0])); | |
| 2494 } | |
| 2495 | |
| 2496 static void | |
| 2497 chain_rewind_coding_stream (struct coding_stream *str) | |
| 2498 { | |
| 2499 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2500 } | |
| 2501 | |
| 2502 static void | |
| 2503 chain_init_coding_streams_1 (struct chain_coding_stream *data, | |
| 2504 unsigned_char_dynarr *dst, | |
| 2505 int ncodesys, Lisp_Object *codesys, | |
| 2506 enum encode_decode direction) | |
| 2507 { | |
| 2508 int i; | |
| 2509 Lisp_Object lstream_out; | |
| 2510 | |
| 2511 data->lstream_count = ncodesys + 1; | |
| 2512 data->lstreams = xnew_array (Lisp_Object, data->lstream_count); | |
| 2513 | |
| 2514 lstream_out = make_dynarr_output_stream (dst); | |
| 2515 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0); | |
| 2516 data->lstreams[data->lstream_count - 1] = lstream_out; | |
| 2517 | |
| 2518 for (i = ncodesys - 1; i >= 0; i--) | |
| 2519 { | |
| 2520 data->lstreams[i] = | |
| 2521 make_coding_output_stream | |
| 2522 (XLSTREAM (lstream_out), | |
| 2523 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i], | |
| 800 | 2524 direction, 0); |
| 771 | 2525 lstream_out = data->lstreams[i]; |
| 2526 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, | |
| 2527 0); | |
| 2528 } | |
| 2529 data->initted = 1; | |
| 2530 } | |
| 2531 | |
| 2532 static Bytecount | |
| 2533 chain_convert (struct coding_stream *str, const UExtbyte *src, | |
| 2534 unsigned_char_dynarr *dst, Bytecount n) | |
| 2535 { | |
| 2536 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain); | |
| 2537 | |
| 2538 if (str->eof) | |
| 2539 { | |
| 2540 /* Each will close the next; there is always at least one stream (the | |
| 2541 dynarr stream at the end) if we're initted. We need to close now | |
| 2542 because more data may be generated. */ | |
| 2543 if (data->initted) | |
| 2544 Lstream_close (XLSTREAM (data->lstreams[0])); | |
| 2545 return n; | |
| 2546 } | |
| 2547 | |
| 2548 if (!data->initted) | |
| 2549 chain_init_coding_streams_1 | |
| 2550 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys), | |
| 2551 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction); | |
| 2552 | |
| 2553 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0) | |
| 2554 return -1; | |
| 2555 return n; | |
| 2556 } | |
| 2557 | |
| 2558 static void | |
| 2559 chain_finalize_coding_stream_1 (struct chain_coding_stream *data) | |
| 2560 { | |
| 2561 if (data->lstreams) | |
| 2562 { | |
| 2297 | 2563 /* During GC, these objects are unmarked, and are about to be freed. |
| 2564 We do NOT want them on the free list, and that will cause lots of | |
| 2565 nastiness including crashes. Just let them be freed normally. */ | |
| 771 | 2566 if (!gc_in_progress) |
| 2567 { | |
| 2568 int i; | |
| 2297 | 2569 /* Order of deletion is important here! Delete from the head of |
| 2570 the chain and work your way towards the tail. In general, | |
| 2571 when you delete an object, there should be *NO* pointers to it | |
| 2572 anywhere. Deleting back-to-front would be a problem because | |
| 2573 there are pointers going forward. If there were pointers in | |
| 2574 both directions, you'd have to disconnect the pointers to a | |
| 2575 particular object before deleting it. */ | |
| 771 | 2576 for (i = 0; i < data->lstream_count; i++) |
| 2577 Lstream_delete (XLSTREAM ((data->lstreams)[i])); | |
| 2578 } | |
| 1726 | 2579 xfree (data->lstreams, Lisp_Object *); |
| 771 | 2580 } |
| 2581 } | |
| 2582 | |
| 2583 static void | |
| 2584 chain_finalize_coding_stream (struct coding_stream *str) | |
| 2585 { | |
| 2586 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain)); | |
| 2587 } | |
| 2588 | |
| 2589 static void | |
| 2590 chain_finalize (Lisp_Object c) | |
| 2591 { | |
| 2592 if (XCODING_SYSTEM_CHAIN_CHAIN (c)) | |
| 1726 | 2593 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c), Lisp_Object *); |
| 771 | 2594 } |
| 2595 | |
| 428 | 2596 static int |
| 771 | 2597 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 2598 { | |
| 2599 if (EQ (key, Qchain)) | |
| 2600 { | |
| 2601 Lisp_Object *cslist; | |
| 2602 int count = 0; | |
| 2603 int i; | |
| 2604 | |
| 2367 | 2605 { |
| 2606 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2607 { | |
| 2608 Fget_coding_system (elt); | |
| 2609 count++; | |
| 2610 } | |
| 2611 } | |
| 771 | 2612 |
| 2613 cslist = xnew_array (Lisp_Object, count); | |
| 2614 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist; | |
| 2615 | |
| 2616 count = 0; | |
| 2367 | 2617 { |
| 2618 EXTERNAL_LIST_LOOP_2 (elt, value) | |
| 2619 { | |
| 2620 cslist[count] = Fget_coding_system (elt); | |
| 2621 count++; | |
| 2622 } | |
| 2623 } | |
| 771 | 2624 |
| 2625 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count; | |
| 2626 | |
| 2627 for (i = 0; i < count - 1; i++) | |
| 2628 { | |
| 2629 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) != | |
| 2630 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE)) | |
| 2631 invalid_argument_2 ("Sink of first must match source of second", | |
| 2632 cslist[i], cslist[i + 1]); | |
| 2633 } | |
| 2634 } | |
| 2635 else if (EQ (key, Qcanonicalize_after_coding)) | |
| 2636 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = | |
| 2637 Fget_coding_system (value); | |
| 2638 else | |
| 2639 return 0; | |
| 2640 return 1; | |
| 2641 } | |
| 2642 | |
| 2643 static Lisp_Object | |
| 2644 chain_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 2645 { | |
| 2646 if (EQ (prop, Qchain)) | |
| 2647 { | |
| 2648 Lisp_Object result = Qnil; | |
| 2649 int i; | |
| 2650 | |
| 2651 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++) | |
| 2652 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i], | |
| 2653 result); | |
| 2654 | |
| 2655 return Fnreverse (result); | |
| 2656 } | |
| 2657 else if (EQ (prop, Qcanonicalize_after_coding)) | |
| 2658 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system); | |
| 2659 else | |
| 2660 return Qunbound; | |
| 2661 } | |
| 2662 | |
| 2663 static enum source_sink_type | |
| 2664 chain_conversion_end_type (Lisp_Object codesys) | |
| 2665 { | |
| 2666 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys); | |
| 2667 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys); | |
| 2668 int charp_source, charp_sink; | |
| 2669 | |
| 2670 if (n == 0) | |
| 2671 return DECODES_BYTE_TO_BYTE; /* arbitrary */ | |
| 2672 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE); | |
| 2673 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK); | |
| 2674 | |
| 2675 switch (charp_source * 2 + charp_sink) | |
| 2676 { | |
| 2677 case 0: return DECODES_BYTE_TO_BYTE; | |
| 2678 case 1: return DECODES_BYTE_TO_CHARACTER; | |
| 2679 case 2: return DECODES_CHARACTER_TO_BYTE; | |
| 2680 case 3: return DECODES_CHARACTER_TO_CHARACTER; | |
| 2681 } | |
| 2682 | |
| 2500 | 2683 ABORT (); |
| 771 | 2684 return DECODES_BYTE_TO_BYTE; |
| 2685 } | |
| 2686 | |
| 2687 | |
| 2688 /************************************************************************/ | |
| 2689 /* No-conversion methods */ | |
| 2690 /************************************************************************/ | |
| 2691 | |
| 2692 /* "No conversion"; used for binary files. We use quotes because there | |
| 2693 really is some conversion being applied (it does byte<->char | |
| 2694 conversion), but it appears to the user as if the text is read in | |
| 2297 | 2695 without conversion. |
| 2696 | |
| 2697 #### Shouldn't we _call_ it that, then? And while we're at it, | |
| 2698 separate it into "to_internal" and "to_external"? */ | |
| 771 | 2699 DEFINE_CODING_SYSTEM_TYPE (no_conversion); |
| 2700 | |
| 2701 /* This is used when reading in "binary" files -- i.e. files that may | |
| 2702 contain all 256 possible byte values and that are not to be | |
| 2703 interpreted as being in any particular encoding. */ | |
| 2704 static Bytecount | |
| 2705 no_conversion_convert (struct coding_stream *str, | |
| 2706 const UExtbyte *src, | |
| 2707 unsigned_char_dynarr *dst, Bytecount n) | |
| 2708 { | |
| 2709 UExtbyte c; | |
| 2710 unsigned int ch = str->ch; | |
| 2711 Bytecount orign = n; | |
| 2712 | |
| 2713 if (str->direction == CODING_DECODE) | |
| 2714 { | |
| 2715 while (n--) | |
| 2716 { | |
| 2717 c = *src++; | |
| 2718 | |
| 2719 DECODE_ADD_BINARY_CHAR (c, dst); | |
| 2720 } | |
| 2721 | |
| 2722 if (str->eof) | |
| 2723 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst); | |
| 2724 } | |
| 2725 else | |
| 2726 { | |
| 2727 | |
| 2728 while (n--) | |
| 2729 { | |
| 2730 c = *src++; | |
| 826 | 2731 if (byte_ascii_p (c)) |
| 771 | 2732 { |
| 2733 assert (ch == 0); | |
| 2734 Dynarr_add (dst, c); | |
| 2735 } | |
| 2736 #ifdef MULE | |
| 867 | 2737 else if (ibyte_leading_byte_p (c)) |
| 771 | 2738 { |
| 2739 assert (ch == 0); | |
| 2740 if (c == LEADING_BYTE_LATIN_ISO8859_1 || | |
| 2741 c == LEADING_BYTE_CONTROL_1) | |
| 2742 ch = c; | |
| 2743 else | |
| 2297 | 2744 /* #### This is just plain unacceptable. */ |
| 771 | 2745 Dynarr_add (dst, '~'); /* untranslatable character */ |
| 2746 } | |
| 2747 else | |
| 2748 { | |
| 2749 if (ch == LEADING_BYTE_LATIN_ISO8859_1) | |
| 2750 Dynarr_add (dst, c); | |
| 2751 else if (ch == LEADING_BYTE_CONTROL_1) | |
| 2752 { | |
| 2753 assert (c < 0xC0); | |
| 2754 Dynarr_add (dst, c - 0x20); | |
| 2755 } | |
| 2756 /* else it should be the second or third byte of an | |
| 2757 untranslatable character, so ignore it */ | |
| 2758 ch = 0; | |
| 2759 } | |
| 2760 #endif /* MULE */ | |
| 2761 | |
| 2762 } | |
| 2763 } | |
| 2764 | |
| 2765 str->ch = ch; | |
| 2766 return orign; | |
| 2767 } | |
| 2768 | |
| 2769 DEFINE_DETECTOR (no_conversion); | |
| 2770 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 2771 | |
| 2772 struct no_conversion_detector | |
| 2773 { | |
| 2774 int dummy; | |
| 2775 }; | |
| 2776 | |
| 2777 static void | |
| 2286 | 2778 no_conversion_detect (struct detection_state *st, const UExtbyte *UNUSED (src), |
| 2779 Bytecount UNUSED (n)) | |
| 771 | 2780 { |
| 2781 /* Hack until we get better handling of this stuff! */ | |
| 2782 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY; | |
| 2783 } | |
| 2784 | |
| 2785 | |
| 2786 /************************************************************************/ | |
| 2787 /* Convert-eol methods */ | |
| 2788 /************************************************************************/ | |
| 2789 | |
| 2790 /* This is used to handle end-of-line (EOL) differences. It is | |
| 2819 | 2791 character-to-character, and works (when encoding) *BEFORE* sending data to |
| 2792 the main encoding routine -- thus, that routine must handle different EOL | |
| 2793 types itself if it does line-oriented type processing. This is unavoidable | |
| 2794 because we don't know whether the output of the main encoding routine is | |
| 2795 ASCII compatible (UTF-16 is definitely not, for example). [[ sjt sez this | |
| 2796 is bogus. There should be _no_ EOL processing (or processing of any kind) | |
| 2797 after conversion to external. ]] | |
| 771 | 2798 |
| 793 | 2799 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil. |
| 771 | 2800 */ |
| 2801 | |
| 2802 struct convert_eol_coding_system | |
| 2803 { | |
| 2804 enum eol_type subtype; | |
| 2132 | 2805 int dummy; /* On some architectures (eg ia64) the portable dumper can |
| 2806 produce unaligned access errors without this field. Probably | |
| 2807 because the combined structure of this structure and | |
| 2808 Lisp_Coding_System is not properly aligned. */ | |
| 771 | 2809 }; |
| 2810 | |
| 2811 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2812 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2813 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \ | |
| 2814 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype) | |
| 2815 | |
| 2816 struct convert_eol_coding_stream | |
| 2817 { | |
| 2818 enum eol_type actual; | |
| 2819 }; | |
| 2820 | |
| 1204 | 2821 static const struct memory_description |
| 771 | 2822 convert_eol_coding_system_description[] = { |
| 2823 { XD_END } | |
| 2824 }; | |
| 2825 | |
| 1204 | 2826 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol); |
| 2827 | |
| 771 | 2828 static void |
| 2286 | 2829 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun, |
| 2830 int UNUSED (escapeflag)) | |
| 771 | 2831 { |
| 2832 struct convert_eol_coding_system *data = | |
| 2833 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol); | |
| 2834 | |
| 2835 write_fmt_string (printcharfun, "(%s)", | |
| 2836 data->subtype == EOL_LF ? "lf" : | |
| 2837 data->subtype == EOL_CRLF ? "crlf" : | |
| 2838 data->subtype == EOL_CR ? "cr" : | |
| 793 | 2839 data->subtype == EOL_AUTODETECT ? "nil" : |
| 2500 | 2840 (ABORT(), "")); |
| 771 | 2841 } |
| 2842 | |
| 2843 static enum source_sink_type | |
| 2286 | 2844 convert_eol_conversion_end_type (Lisp_Object UNUSED (codesys)) |
| 771 | 2845 { |
| 2846 return DECODES_CHARACTER_TO_CHARACTER; | |
| 2847 } | |
| 2848 | |
| 2849 static int | |
| 2850 convert_eol_putprop (Lisp_Object codesys, | |
| 2851 Lisp_Object key, | |
| 2852 Lisp_Object value) | |
| 2853 { | |
| 2854 struct convert_eol_coding_system *data = | |
| 2855 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol); | |
| 2856 | |
| 2857 if (EQ (key, Qsubtype)) | |
| 2858 { | |
| 2859 if (EQ (value, Qlf) /* || EQ (value, Qunix) */) | |
| 2860 data->subtype = EOL_LF; | |
| 2861 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */) | |
| 2862 data->subtype = EOL_CRLF; | |
| 2863 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */) | |
| 2864 data->subtype = EOL_CR; | |
| 793 | 2865 else if (EQ (value, Qnil)) |
| 771 | 2866 data->subtype = EOL_AUTODETECT; |
| 2867 else invalid_constant ("Unrecognized eol type", value); | |
| 2868 } | |
| 2869 else | |
| 2870 return 0; | |
| 2871 return 1; | |
| 2872 } | |
| 2873 | |
| 2874 static Lisp_Object | |
| 2875 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop) | |
| 2876 { | |
| 2877 struct convert_eol_coding_system *data = | |
| 2878 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol); | |
| 2879 | |
| 2880 if (EQ (prop, Qsubtype)) | |
| 2881 { | |
| 2882 switch (data->subtype) | |
| 2883 { | |
| 2884 case EOL_LF: return Qlf; | |
| 2885 case EOL_CRLF: return Qcrlf; | |
| 2886 case EOL_CR: return Qcr; | |
| 793 | 2887 case EOL_AUTODETECT: return Qnil; |
| 2500 | 2888 default: ABORT (); |
| 771 | 2889 } |
| 2890 } | |
| 2891 | |
| 2892 return Qunbound; | |
| 2893 } | |
| 2894 | |
| 2895 static void | |
| 2896 convert_eol_init_coding_stream (struct coding_stream *str) | |
| 2897 { | |
| 2898 struct convert_eol_coding_stream *data = | |
| 2899 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 2900 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 2901 } | |
| 2902 | |
| 2903 static Bytecount | |
| 867 | 2904 convert_eol_convert (struct coding_stream *str, const Ibyte *src, |
| 771 | 2905 unsigned_char_dynarr *dst, Bytecount n) |
| 2906 { | |
| 2907 if (str->direction == CODING_DECODE) | |
| 2908 { | |
| 2909 struct convert_eol_coding_stream *data = | |
| 2910 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 2911 | |
| 2912 if (data->actual == EOL_AUTODETECT) | |
| 2913 { | |
| 2914 Bytecount n2 = n; | |
| 867 | 2915 const Ibyte *src2 = src; |
| 771 | 2916 |
| 2917 for (; n2; n2--) | |
| 2918 { | |
| 867 | 2919 Ibyte c = *src2++; |
| 771 | 2920 if (c == '\n') |
| 2921 { | |
| 2922 data->actual = EOL_LF; | |
| 2923 break; | |
| 2924 } | |
| 2925 else if (c == '\r') | |
| 2926 { | |
| 2927 if (n2 == 1) | |
| 2928 { | |
| 2929 /* If we're seeing a '\r' at the end of the data, then | |
| 2930 reject the '\r' right now so it doesn't become an | |
| 2931 issue in the code below -- unless we're at the end of | |
| 2932 the stream, in which case we can't do that (because | |
| 2933 then the '\r' will never get written out), and in any | |
| 2934 case we should be recognizing it at EOL_CR format. */ | |
| 2935 if (str->eof) | |
| 2936 data->actual = EOL_CR; | |
| 2937 else | |
| 2938 n--; | |
| 2939 break; | |
| 2940 } | |
| 2941 else if (*src2 == '\n') | |
| 2942 data->actual = EOL_CRLF; | |
| 2943 else | |
| 2944 data->actual = EOL_CR; | |
| 2945 break; | |
| 2946 } | |
| 2947 } | |
| 2948 } | |
| 2949 | |
| 2950 /* str->eof is set, the caller reached EOF on the other end and has | |
| 2951 no new data to give us. The only data we get is the data we | |
| 2952 rejected from last time. */ | |
| 2953 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT || | |
| 2954 (str->eof)) | |
| 2955 Dynarr_add_many (dst, src, n); | |
| 2956 else | |
| 2957 { | |
| 867 | 2958 const Ibyte *end = src + n; |
| 771 | 2959 while (1) |
| 2960 { | |
| 2961 /* Find the next section with no \r and add it. */ | |
| 867 | 2962 const Ibyte *runstart = src; |
| 2963 src = (Ibyte *) memchr (src, '\r', end - src); | |
| 771 | 2964 if (!src) |
| 2965 src = end; | |
| 2966 Dynarr_add_many (dst, runstart, src - runstart); | |
| 2967 /* Stop if at end ... */ | |
| 2968 if (src == end) | |
| 2969 break; | |
| 2970 /* ... else, translate as necessary. */ | |
| 2971 src++; | |
| 2972 if (data->actual == EOL_CR) | |
| 2973 Dynarr_add (dst, '\n'); | |
| 2974 /* We need to be careful here with CRLF. If we see a CR at the | |
| 2975 end of the data, we don't know if it's part of a CRLF, so we | |
| 2976 reject it. Otherwise: If it's part of a CRLF, eat it and | |
| 2977 loop; the following LF gets added next time around. If it's | |
| 2978 not part of a CRLF, add the CR and loop. The following | |
| 2979 character will be processed in the next loop iteration. This | |
| 2980 correctly handles a sequence like CR+CR+LF. */ | |
| 2981 else if (src == end) | |
| 2982 return n - 1; /* reject the CR at the end; we'll get it again | |
| 2983 next time the convert method is called */ | |
| 2984 else if (*src != '\n') | |
| 2985 Dynarr_add (dst, '\r'); | |
| 2986 } | |
| 2987 } | |
| 2988 | |
| 2989 return n; | |
| 2990 } | |
| 2991 else | |
| 2992 { | |
| 2993 enum eol_type subtype = | |
| 2994 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys); | |
| 867 | 2995 const Ibyte *end = src + n; |
| 771 | 2996 |
| 2997 /* We try to be relatively efficient here. */ | |
| 2998 if (subtype == EOL_LF) | |
| 2999 Dynarr_add_many (dst, src, n); | |
| 3000 else | |
| 3001 { | |
| 3002 while (1) | |
| 3003 { | |
| 3004 /* Find the next section with no \n and add it. */ | |
| 867 | 3005 const Ibyte *runstart = src; |
| 3006 src = (Ibyte *) memchr (src, '\n', end - src); | |
| 771 | 3007 if (!src) |
| 3008 src = end; | |
| 3009 Dynarr_add_many (dst, runstart, src - runstart); | |
| 3010 /* Stop if at end ... */ | |
| 3011 if (src == end) | |
| 3012 break; | |
| 3013 /* ... else, skip over \n and add its translation. */ | |
| 3014 src++; | |
| 3015 Dynarr_add (dst, '\r'); | |
| 3016 if (subtype == EOL_CRLF) | |
| 3017 Dynarr_add (dst, '\n'); | |
| 3018 } | |
| 3019 } | |
| 3020 | |
| 3021 return n; | |
| 3022 } | |
| 3023 } | |
| 3024 | |
| 3025 static Lisp_Object | |
| 3026 convert_eol_canonicalize_after_coding (struct coding_stream *str) | |
| 3027 { | |
| 3028 struct convert_eol_coding_stream *data = | |
| 3029 CODING_STREAM_TYPE_DATA (str, convert_eol); | |
| 3030 | |
| 3031 if (str->direction == CODING_ENCODE) | |
| 3032 return str->codesys; | |
| 3033 | |
| 3034 switch (data->actual) | |
| 3035 { | |
| 3036 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf); | |
| 3037 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf); | |
| 3038 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr); | |
| 3039 case EOL_AUTODETECT: return str->codesys; | |
| 2500 | 3040 default: ABORT (); return Qnil; |
| 771 | 3041 } |
| 3042 } | |
| 3043 | |
| 3044 | |
| 3045 /************************************************************************/ | |
| 3046 /* Undecided methods */ | |
| 3047 /************************************************************************/ | |
| 3048 | |
| 3049 /* Do autodetection. We can autodetect the EOL type only, the coding | |
| 3050 system only, or both. We only do autodetection when decoding; when | |
| 3051 encoding, we just pass the data through. | |
| 3052 | |
| 3053 When doing just EOL detection, a coding system can be specified; if so, | |
| 3054 we will decode this data through the coding system before doing EOL | |
| 3055 detection. The reason for specifying this is so that | |
| 3056 canonicalize-after-coding works: We will canonicalize the specified | |
| 3057 coding system into the appropriate EOL type. When doing both coding and | |
| 3058 EOL detection, we do similar canonicalization, and also catch situations | |
| 3059 where the EOL type is overspecified, i.e. the detected coding system | |
| 3060 specifies an EOL type, and either switch to the equivalent | |
| 3061 non-EOL-processing coding system (if possible), or terminate EOL | |
| 3062 detection and use the specified EOL type. This prevents data from being | |
| 3063 EOL-processed twice. | |
| 3064 */ | |
| 3065 | |
| 3066 struct undecided_coding_system | |
| 3067 { | |
| 3068 int do_eol, do_coding; | |
| 3069 Lisp_Object cs; | |
| 3070 }; | |
| 3071 | |
| 3072 struct undecided_coding_stream | |
| 3073 { | |
| 3074 Lisp_Object actual; | |
| 3075 /* Either 2 or 3 lstreams here; see undecided_convert */ | |
| 3076 struct chain_coding_stream c; | |
| 3077 | |
| 3078 struct detection_state *st; | |
| 3079 }; | |
| 3080 | |
| 1204 | 3081 static const struct memory_description undecided_coding_system_description[] = { |
| 3082 { XD_LISP_OBJECT, offsetof (struct undecided_coding_system, cs) }, | |
| 771 | 3083 { XD_END } |
| 3084 }; | |
| 3085 | |
| 1204 | 3086 static const struct memory_description undecided_coding_stream_description_1 [] = { |
| 3087 { XD_LISP_OBJECT, offsetof (struct undecided_coding_stream, actual) }, | |
| 2367 | 3088 { XD_BLOCK_ARRAY, offsetof (struct undecided_coding_stream, c), |
| 2551 | 3089 1, { &chain_coding_stream_description } }, |
| 1204 | 3090 { XD_END } |
| 3091 }; | |
| 3092 | |
| 3093 const struct sized_memory_description undecided_coding_stream_description = { | |
| 3094 sizeof (struct undecided_coding_stream), undecided_coding_stream_description_1 | |
| 3095 }; | |
| 3096 | |
| 3097 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (undecided); | |
| 3098 | |
| 771 | 3099 static void |
| 3100 undecided_init (Lisp_Object codesys) | |
| 3101 { | |
| 3102 struct undecided_coding_system *data = | |
| 3103 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3104 | |
| 3105 data->cs = Qnil; | |
| 3106 } | |
| 3107 | |
| 3108 static void | |
| 3109 undecided_mark (Lisp_Object codesys) | |
| 3110 { | |
| 3111 struct undecided_coding_system *data = | |
| 3112 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3113 | |
| 3114 mark_object (data->cs); | |
| 3115 } | |
| 3116 | |
| 3117 static void | |
| 3118 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 3119 { | |
| 3120 struct undecided_coding_system *data = | |
| 3121 XCODING_SYSTEM_TYPE_DATA (cs, undecided); | |
| 3122 int need_space = 0; | |
| 3123 | |
| 826 | 3124 write_c_string (printcharfun, "("); |
| 771 | 3125 if (data->do_eol) |
| 3126 { | |
| 826 | 3127 write_c_string (printcharfun, "do-eol"); |
| 771 | 3128 need_space = 1; |
| 3129 } | |
| 3130 if (data->do_coding) | |
| 3131 { | |
| 3132 if (need_space) | |
| 826 | 3133 write_c_string (printcharfun, " "); |
| 3134 write_c_string (printcharfun, "do-coding"); | |
| 771 | 3135 need_space = 1; |
| 3136 } | |
| 3137 if (!NILP (data->cs)) | |
| 3138 { | |
| 3139 if (need_space) | |
| 826 | 3140 write_c_string (printcharfun, " "); |
| 3141 write_c_string (printcharfun, "coding-system="); | |
| 771 | 3142 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag); |
| 3143 } | |
| 826 | 3144 write_c_string (printcharfun, ")"); |
| 771 | 3145 } |
| 3146 | |
| 3147 static void | |
| 3148 undecided_mark_coding_stream (struct coding_stream *str) | |
| 3149 { | |
| 1204 | 3150 mark_object (CODING_STREAM_TYPE_DATA (str, undecided)->actual); |
| 771 | 3151 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); |
| 3152 } | |
| 3153 | |
| 3154 static int | |
| 3155 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) | |
| 3156 { | |
| 3157 struct undecided_coding_system *data = | |
| 3158 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3159 | |
| 3160 if (EQ (key, Qdo_eol)) | |
| 3161 data->do_eol = 1; | |
| 3162 else if (EQ (key, Qdo_coding)) | |
| 3163 data->do_coding = 1; | |
| 3164 else if (EQ (key, Qcoding_system)) | |
| 3165 data->cs = get_coding_system_for_text_file (value, 0); | |
| 3166 else | |
| 3167 return 0; | |
| 3168 return 1; | |
| 3169 } | |
| 3170 | |
| 3171 static Lisp_Object | |
| 3172 undecided_getprop (Lisp_Object codesys, Lisp_Object prop) | |
| 3173 { | |
| 3174 struct undecided_coding_system *data = | |
| 3175 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3176 | |
| 3177 if (EQ (prop, Qdo_eol)) | |
| 3178 return data->do_eol ? Qt : Qnil; | |
| 3179 if (EQ (prop, Qdo_coding)) | |
| 3180 return data->do_coding ? Qt : Qnil; | |
| 3181 if (EQ (prop, Qcoding_system)) | |
| 3182 return data->cs; | |
| 3183 return Qunbound; | |
| 3184 } | |
| 3185 | |
| 3186 static struct detection_state * | |
| 3187 allocate_detection_state (void) | |
| 3188 { | |
| 3189 int i; | |
| 3190 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3191 struct detection_state *block; | |
| 3192 | |
| 3193 for (i = 0; i < coding_detector_count; i++) | |
| 3194 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3195 | |
| 3196 block = (struct detection_state *) xmalloc_and_zero (size); | |
| 3197 | |
| 3198 size = MAX_ALIGN_SIZE (sizeof (struct detection_state)); | |
| 3199 for (i = 0; i < coding_detector_count; i++) | |
| 3200 { | |
| 3201 block->data_offset[i] = size; | |
| 3202 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size); | |
| 3203 } | |
| 3204 | |
| 3205 return block; | |
| 3206 } | |
| 3207 | |
| 3208 static void | |
| 3209 free_detection_state (struct detection_state *st) | |
| 3210 { | |
| 3211 int i; | |
| 3212 | |
| 3213 for (i = 0; i < coding_detector_count; i++) | |
| 3214 { | |
| 3215 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method) | |
| 3216 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method | |
| 3217 (st); | |
| 3218 } | |
| 3219 | |
| 1726 | 3220 xfree (st, struct detection_state *); |
| 771 | 3221 } |
| 3222 | |
| 3223 static int | |
| 3224 coding_category_symbol_to_id (Lisp_Object symbol) | |
| 428 | 3225 { |
| 3226 int i; | |
| 3227 | |
| 3228 CHECK_SYMBOL (symbol); | |
| 771 | 3229 for (i = 0; i < coding_detector_count; i++) |
| 3230 { | |
| 3231 detector_category_dynarr *cats = | |
| 3232 Dynarr_at (all_coding_detectors, i).cats; | |
| 3233 int j; | |
| 3234 | |
| 3235 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3236 if (EQ (Dynarr_at (cats, j).sym, symbol)) | |
| 3237 return Dynarr_at (cats, j).id; | |
| 3238 } | |
| 3239 | |
| 563 | 3240 invalid_constant ("Unrecognized coding category", symbol); |
| 1204 | 3241 RETURN_NOT_REACHED (0); |
| 428 | 3242 } |
| 3243 | |
| 771 | 3244 static Lisp_Object |
| 3245 coding_category_id_to_symbol (int id) | |
| 428 | 3246 { |
| 3247 int i; | |
| 771 | 3248 |
| 3249 for (i = 0; i < coding_detector_count; i++) | |
| 3250 { | |
| 3251 detector_category_dynarr *cats = | |
| 3252 Dynarr_at (all_coding_detectors, i).cats; | |
| 3253 int j; | |
| 3254 | |
| 3255 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3256 if (id == Dynarr_at (cats, j).id) | |
| 3257 return Dynarr_at (cats, j).sym; | |
| 3258 } | |
| 3259 | |
| 2500 | 3260 ABORT (); |
| 771 | 3261 return Qnil; /* (usually) not reached */ |
| 428 | 3262 } |
| 3263 | |
| 771 | 3264 static Lisp_Object |
| 3265 detection_result_number_to_symbol (enum detection_result result) | |
| 428 | 3266 { |
| 1494 | 3267 /* let compiler warn if not all enumerators are handled */ |
| 3268 switch (result) { | |
| 3269 #define FROB(sym, num) case num: return (sym) | |
| 771 | 3270 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); |
| 3271 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3272 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3273 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3274 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3275 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3276 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3277 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3278 #undef FROB | |
| 1494 | 3279 } |
| 771 | 3280 |
| 2500 | 3281 ABORT (); |
| 771 | 3282 return Qnil; /* (usually) not reached */ |
| 3283 } | |
| 3284 | |
| 778 | 3285 #if 0 /* not used */ |
| 771 | 3286 static enum detection_result |
| 3287 detection_result_symbol_to_number (Lisp_Object symbol) | |
| 3288 { | |
| 1494 | 3289 /* using switch here would be bad style, and doesn't help */ |
| 771 | 3290 #define FROB(sym, num) if (EQ (symbol, sym)) return (num) |
| 3291 FROB (Qnear_certainty, DET_NEAR_CERTAINTY); | |
| 3292 FROB (Qquite_probable, DET_QUITE_PROBABLE); | |
| 3293 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY); | |
| 1494 | 3294 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY); |
| 771 | 3295 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY); |
| 3296 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY); | |
| 3297 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE); | |
| 3298 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE); | |
| 3299 #undef FROB | |
| 3300 | |
| 3301 invalid_constant ("Unrecognized detection result", symbol); | |
| 3302 return ((enum detection_result) 0); /* not reached */ | |
| 3303 } | |
| 778 | 3304 #endif /* 0 */ |
| 771 | 3305 |
| 3306 /* Set all detection results for a given detector to a specified value. */ | |
| 3307 void | |
| 3308 set_detection_results (struct detection_state *st, int detector, int given) | |
| 3309 { | |
| 3310 detector_category_dynarr *cats = | |
| 3311 Dynarr_at (all_coding_detectors, detector).cats; | |
| 3312 int i; | |
| 3313 | |
| 3314 for (i = 0; i < Dynarr_length (cats); i++) | |
| 3315 st->categories[Dynarr_at (cats, i).id] = given; | |
| 3316 } | |
| 428 | 3317 |
| 3318 static int | |
| 3319 acceptable_control_char_p (int c) | |
| 3320 { | |
| 3321 switch (c) | |
| 3322 { | |
| 3323 /* Allow and ignore control characters that you might | |
| 3324 reasonably see in a text file */ | |
| 3325 case '\r': | |
| 3326 case '\n': | |
| 3327 case '\t': | |
| 3328 case 7: /* bell */ | |
| 3329 case 8: /* backspace */ | |
| 3330 case 11: /* vertical tab */ | |
| 3331 case 12: /* form feed */ | |
| 3332 case 26: /* MS-DOS C-z junk */ | |
| 3333 case 31: /* '^_' -- for info */ | |
| 3334 return 1; | |
| 3335 default: | |
| 3336 return 0; | |
| 3337 } | |
| 3338 } | |
| 3339 | |
| 771 | 3340 #ifdef DEBUG_XEMACS |
| 3341 | |
| 3342 static UExtbyte | |
| 3343 hex_digit_to_char (int digit) | |
| 428 | 3344 { |
| 771 | 3345 if (digit < 10) |
| 3346 return digit + '0'; | |
| 3347 else | |
| 3348 return digit - 10 + 'A'; | |
| 428 | 3349 } |
| 3350 | |
| 771 | 3351 static void |
| 3352 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n) | |
| 428 | 3353 { |
| 771 | 3354 UExtbyte *ascii = alloca_array (UExtbyte, n + 1); |
| 3355 UExtbyte *hex = alloca_array (UExtbyte, 3 * n + 1); | |
| 3356 int i; | |
| 3357 | |
| 3358 for (i = 0; i < n; i++) | |
| 428 | 3359 { |
| 771 | 3360 UExtbyte c = src[i]; |
| 3361 if (c < 0x20) | |
| 3362 ascii[i] = '.'; | |
| 428 | 3363 else |
| 771 | 3364 ascii[i] = c; |
| 3365 hex[3 * i] = hex_digit_to_char (c >> 4); | |
| 3366 hex[3 * i + 1] = hex_digit_to_char (c & 0xF); | |
| 3367 hex[3 * i + 2] = ' '; | |
| 428 | 3368 } |
| 771 | 3369 ascii[i] = '\0'; |
| 3370 hex[3 * i - 1] = '\0'; | |
| 3371 stderr_out ("%s %s", ascii, hex); | |
| 428 | 3372 } |
| 3373 | |
| 771 | 3374 #endif /* DEBUG_XEMACS */ |
| 3375 | |
| 3376 /* Attempt to determine the encoding of the given text. Before calling | |
| 3377 this function for the first time, you must zero out the detection state. | |
| 428 | 3378 |
| 3379 Returns: | |
| 3380 | |
| 771 | 3381 0 == keep going |
| 3382 1 == stop | |
| 428 | 3383 */ |
| 3384 | |
| 3385 static int | |
| 771 | 3386 detect_coding_type (struct detection_state *st, const UExtbyte *src, |
| 3387 Bytecount n) | |
| 428 | 3388 { |
| 771 | 3389 Bytecount n2 = n; |
| 3390 const UExtbyte *src2 = src; | |
| 3391 int i; | |
| 3392 | |
| 3393 #ifdef DEBUG_XEMACS | |
| 3394 if (!NILP (Vdebug_coding_detection)) | |
| 3395 { | |
| 3396 int bytes = min (16, n); | |
| 3397 stderr_out ("detect_coding_type: processing %ld bytes\n", n); | |
| 3398 stderr_out ("First %d: ", bytes); | |
| 3399 output_bytes_in_ascii_and_hex (src, bytes); | |
| 3400 stderr_out ("\nLast %d: ", bytes); | |
| 3401 output_bytes_in_ascii_and_hex (src + n - bytes, bytes); | |
| 3402 stderr_out ("\n"); | |
| 3403 } | |
| 3404 #endif /* DEBUG_XEMACS */ | |
| 428 | 3405 if (!st->seen_non_ascii) |
| 3406 { | |
| 771 | 3407 for (; n2; n2--, src2++) |
| 428 | 3408 { |
| 771 | 3409 UExtbyte c = *src2; |
| 428 | 3410 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80) |
| 3411 { | |
| 3412 st->seen_non_ascii = 1; | |
| 3413 break; | |
| 3414 } | |
| 3415 } | |
| 3416 } | |
| 3417 | |
| 771 | 3418 for (i = 0; i < coding_detector_count; i++) |
| 3419 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n); | |
| 3420 | |
| 3421 st->bytes_seen += n; | |
| 3422 | |
| 3423 #ifdef DEBUG_XEMACS | |
| 3424 if (!NILP (Vdebug_coding_detection)) | |
| 3425 { | |
| 3426 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii); | |
| 1494 | 3427 if (coding_detector_category_count <= 0) |
| 3428 stderr_out ("found %d detector categories\n", | |
| 3429 coding_detector_category_count); | |
| 771 | 3430 for (i = 0; i < coding_detector_category_count; i++) |
| 3431 stderr_out_lisp | |
| 3432 ("%s: %s\n", | |
| 3433 2, | |
| 3434 coding_category_id_to_symbol (i), | |
| 3435 detection_result_number_to_symbol ((enum detection_result) | |
| 3436 st->categories[i])); | |
| 3437 } | |
| 3438 #endif /* DEBUG_XEMACS */ | |
| 3439 | |
| 3440 { | |
| 3441 int not_unlikely = 0; | |
| 3442 int retval; | |
| 3443 | |
| 3444 for (i = 0; i < coding_detector_category_count; i++) | |
| 3445 if (st->categories[i] >= 0) | |
| 3446 not_unlikely++; | |
| 3447 | |
| 3448 retval = (not_unlikely <= 1 | |
| 3449 #if 0 /* this is bogus */ | |
| 3450 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION | |
| 428 | 3451 #endif |
| 771 | 3452 ); |
| 3453 | |
| 3454 #ifdef DEBUG_XEMACS | |
| 3455 if (!NILP (Vdebug_coding_detection)) | |
| 3456 stderr_out ("detect_coding_type: returning %d (%s)\n", | |
| 3457 retval, retval ? "stop" : "keep going"); | |
| 3458 #endif /* DEBUG_XEMACS */ | |
| 3459 | |
| 3460 return retval; | |
| 428 | 3461 } |
| 3462 } | |
| 3463 | |
| 3464 static Lisp_Object | |
| 771 | 3465 detected_coding_system (struct detection_state *st) |
| 428 | 3466 { |
| 771 | 3467 int i; |
| 3468 int even = 1; | |
| 3469 | |
| 3470 if (st->seen_non_ascii) | |
| 3471 { | |
| 3472 for (i = 0; i < coding_detector_category_count; i++) | |
| 3473 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY) | |
| 3474 { | |
| 3475 even = 0; | |
| 3476 break; | |
| 3477 } | |
| 3478 } | |
| 3479 | |
| 3480 /* #### Here we are ignoring the results of detection when it's all | |
| 3481 ASCII. This is obviously a bad thing. But we need to fix up the | |
| 3482 existing detection methods somewhat before we can switch. */ | |
| 3483 if (even) | |
| 428 | 3484 { |
| 3485 /* If the file was entirely or basically ASCII, use the | |
| 3486 default value of `buffer-file-coding-system'. */ | |
| 3487 Lisp_Object retval = | |
| 3488 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system; | |
| 3489 if (!NILP (retval)) | |
| 3490 { | |
| 771 | 3491 retval = find_coding_system_for_text_file (retval, 0); |
| 428 | 3492 if (NILP (retval)) |
| 3493 { | |
| 3494 warn_when_safe | |
| 3495 (Qbad_variable, Qwarning, | |
| 3496 "Invalid `default-buffer-file-coding-system', set to nil"); | |
| 3497 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil; | |
| 3498 } | |
| 3499 } | |
| 3500 if (NILP (retval)) | |
| 3501 retval = Fget_coding_system (Qraw_text); | |
| 3502 return retval; | |
| 3503 } | |
| 3504 else | |
| 3505 { | |
| 771 | 3506 int likelihood; |
| 3507 Lisp_Object retval = Qnil; | |
| 3508 | |
| 3509 /* Look through the coding categories first by likelihood and then by | |
| 3510 priority and find the first one that is allowed. */ | |
| 3511 | |
| 3512 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--) | |
| 428 | 3513 { |
| 771 | 3514 for (i = 0; i < coding_detector_category_count; i++) |
| 3515 { | |
| 3516 int cat = coding_category_by_priority[i]; | |
| 3517 if (st->categories[cat] == likelihood && | |
| 3518 !NILP (coding_category_system[cat])) | |
| 3519 { | |
| 3520 retval = (get_coding_system_for_text_file | |
| 3521 (coding_category_system[cat], 0)); | |
| 3522 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY) | |
| 3523 warn_when_safe_lispobj | |
| 3524 (intern ("detection"), | |
| 793 | 3525 Qwarning, |
| 771 | 3526 emacs_sprintf_string_lisp |
| 3527 ( | |
| 3528 "Detected coding %s is unlikely to be correct (likelihood == `%s')", | |
| 3529 Qnil, 2, XCODING_SYSTEM_NAME (retval), | |
| 3530 detection_result_number_to_symbol | |
| 3531 ((enum detection_result) likelihood))); | |
| 3532 return retval; | |
| 3533 } | |
| 3534 } | |
| 428 | 3535 } |
| 771 | 3536 |
| 3537 return Fget_coding_system (Qraw_text); | |
| 428 | 3538 } |
| 3539 } | |
| 3540 | |
| 1347 | 3541 /* Look for a coding system in the string (skipping over leading |
| 3542 blanks). If found, return it, otherwise nil. */ | |
| 3543 | |
| 3544 static Lisp_Object | |
| 2531 | 3545 snarf_coding_system (const UExtbyte *p, Bytecount len) |
| 1347 | 3546 { |
| 3547 Bytecount n; | |
| 2531 | 3548 UExtbyte *name; |
| 1347 | 3549 |
| 3550 while (*p == ' ' || *p == '\t') p++, len--; | |
| 3551 len = min (len, 1000); | |
| 3552 name = alloca_ibytes (len + 1); | |
| 3553 memcpy (name, p, len); | |
| 3554 name[len] = '\0'; | |
| 3555 | |
| 3556 /* Get coding system name */ | |
| 3557 /* Characters valid in a MIME charset name (rfc 1521), | |
| 3558 and in a Lisp symbol name. */ | |
| 3559 n = qxestrspn (name, | |
| 3560 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
| 3561 "abcdefghijklmnopqrstuvwxyz" | |
| 3562 "0123456789" | |
| 3563 "!$%&*+-.^_{|}~"); | |
| 3564 if (n > 0) | |
| 3565 { | |
| 3566 name[n] = '\0'; | |
| 2531 | 3567 /* This call to intern_int() is OK because we already verified that |
| 3568 there are only ASCII characters in the string */ | |
| 3569 return find_coding_system_for_text_file (intern_int ((Ibyte *) name), 0); | |
| 1347 | 3570 } |
| 3571 | |
| 3572 return Qnil; | |
| 3573 } | |
| 3574 | |
| 428 | 3575 /* Given a seekable read stream and potential coding system and EOL type |
| 3576 as specified, do any autodetection that is called for. If the | |
| 3577 coding system and/or EOL type are not `autodetect', they will be left | |
| 3578 alone; but this function will never return an autodetect coding system | |
| 3579 or EOL type. | |
| 3580 | |
| 3581 This function does not automatically fetch subsidiary coding systems; | |
| 3582 that should be unnecessary with the explicit eol-type argument. */ | |
| 3583 | |
| 3584 #define LENGTH(string_constant) (sizeof (string_constant) - 1) | |
| 3585 | |
| 771 | 3586 static Lisp_Object |
| 3587 unwind_free_detection_state (Lisp_Object opaque) | |
| 3588 { | |
| 3589 struct detection_state *st = | |
| 3590 (struct detection_state *) get_opaque_ptr (opaque); | |
| 3591 free_detection_state (st); | |
| 3592 free_opaque_ptr (opaque); | |
| 3593 return Qnil; | |
| 3594 } | |
| 3595 | |
| 1347 | 3596 /* #### This duplicates code in `find-coding-system-magic-cookie-in-file' |
| 3597 in files.el. Look into combining them. */ | |
| 3598 | |
| 771 | 3599 static Lisp_Object |
| 3600 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len) | |
| 428 | 3601 { |
| 771 | 3602 const UExtbyte *p; |
| 3603 const UExtbyte *scan_end; | |
| 2531 | 3604 Bytecount cookie_len; |
| 771 | 3605 |
| 3606 /* Look for initial "-*-"; mode line prefix */ | |
| 3607 for (p = data, | |
| 3608 scan_end = data + len - LENGTH ("-*-coding:?-*-"); | |
| 3609 p <= scan_end | |
| 3610 && *p != '\n' | |
| 3611 && *p != '\r'; | |
| 3612 p++) | |
| 3613 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3614 { | |
| 3615 const UExtbyte *local_vars_beg = p + 3; | |
| 3616 /* Look for final "-*-"; mode line suffix */ | |
| 3617 for (p = local_vars_beg, | |
| 3618 scan_end = data + len - LENGTH ("-*-"); | |
| 3619 p <= scan_end | |
| 428 | 3620 && *p != '\n' |
| 3621 && *p != '\r'; | |
| 771 | 3622 p++) |
| 3623 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-') | |
| 3624 { | |
| 3625 const UExtbyte *suffix = p; | |
| 3626 /* Look for "coding:" */ | |
| 3627 for (p = local_vars_beg, | |
| 3628 scan_end = suffix - LENGTH ("coding:?"); | |
| 3629 p <= scan_end; | |
| 3630 p++) | |
| 3631 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0 | |
| 3632 && (p == local_vars_beg | |
| 3633 || (*(p-1) == ' ' || | |
| 3634 *(p-1) == '\t' || | |
| 3635 *(p-1) == ';'))) | |
| 3636 { | |
| 3637 p += LENGTH ("coding:"); | |
| 1347 | 3638 return snarf_coding_system (p, suffix - p); |
| 771 | 3639 break; |
| 3640 } | |
| 3641 break; | |
| 3642 } | |
| 3643 break; | |
| 3644 } | |
| 3645 | |
| 2531 | 3646 /* Look for ;;;###coding system */ |
| 3647 | |
| 3648 cookie_len = LENGTH (";;;###coding system: "); | |
| 3649 | |
| 3650 for (p = data, | |
| 3651 scan_end = data + len - cookie_len; | |
| 3652 p <= scan_end; | |
| 3653 p++) | |
| 1347 | 3654 { |
| 2531 | 3655 if (*p == ';' && !memcmp (p, ";;;###coding system: ", cookie_len)) |
| 3656 { | |
| 3657 const UExtbyte *suffix; | |
| 3658 | |
| 3659 p += cookie_len; | |
| 3660 suffix = p; | |
| 3661 while (suffix < scan_end && !isspace (*suffix)) | |
| 3662 suffix++; | |
| 3663 return snarf_coding_system (p, suffix - p); | |
| 3664 } | |
| 1347 | 3665 } |
| 3666 | |
| 3667 return Qnil; | |
| 771 | 3668 } |
| 3669 | |
| 3670 static Lisp_Object | |
| 3671 determine_real_coding_system (Lstream *stream) | |
| 3672 { | |
| 3673 struct detection_state *st = allocate_detection_state (); | |
| 3674 int depth = record_unwind_protect (unwind_free_detection_state, | |
| 3675 make_opaque_ptr (st)); | |
| 3676 UExtbyte buf[4096]; | |
| 3677 Bytecount nread = Lstream_read (stream, buf, sizeof (buf)); | |
| 3678 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread); | |
| 3679 | |
| 3680 if (NILP (coding_system)) | |
| 3681 { | |
| 3682 while (1) | |
| 3683 { | |
| 3684 if (detect_coding_type (st, buf, nread)) | |
| 428 | 3685 break; |
| 771 | 3686 nread = Lstream_read (stream, buf, sizeof (buf)); |
| 3687 if (nread == 0) | |
| 3688 break; | |
| 428 | 3689 } |
| 771 | 3690 |
| 3691 coding_system = detected_coding_system (st); | |
| 428 | 3692 } |
| 3693 | |
| 3694 Lstream_rewind (stream); | |
| 771 | 3695 |
| 3696 unbind_to (depth); | |
| 3697 return coding_system; | |
| 3698 } | |
| 3699 | |
| 3700 static void | |
| 3701 undecided_init_coding_stream (struct coding_stream *str) | |
| 3702 { | |
| 3703 struct undecided_coding_stream *data = | |
| 3704 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3705 struct undecided_coding_system *csdata = | |
| 3706 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3707 | |
| 3708 data->actual = Qnil; | |
| 3709 | |
| 3710 if (str->direction == CODING_DECODE) | |
| 3711 { | |
| 3712 Lstream *lst = str->other_end; | |
| 3713 | |
| 3714 if ((lst->flags & LSTREAM_FL_READ) && | |
| 3715 Lstream_seekable_p (lst) && | |
| 3716 csdata->do_coding) | |
| 3717 /* We can determine the coding system now. */ | |
| 3718 data->actual = determine_real_coding_system (lst); | |
| 3719 } | |
| 1494 | 3720 |
| 3721 #ifdef DEBUG_XEMACS | |
| 3722 if (!NILP (Vdebug_coding_detection)) | |
| 3723 stderr_out_lisp ("detected coding system: %s\n", 1, data->actual); | |
| 3724 #endif /* DEBUG_XEMACS */ | |
| 771 | 3725 } |
| 3726 | |
| 3727 static void | |
| 3728 undecided_rewind_coding_stream (struct coding_stream *str) | |
| 3729 { | |
| 3730 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3731 } | |
| 3732 | |
| 3733 static void | |
| 3734 undecided_finalize_coding_stream (struct coding_stream *str) | |
| 3735 { | |
| 3736 struct undecided_coding_stream *data = | |
| 3737 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3738 | |
| 3739 chain_finalize_coding_stream_1 | |
| 3740 (&CODING_STREAM_TYPE_DATA (str, undecided)->c); | |
| 3741 if (data->st) | |
| 3742 free_detection_state (data->st); | |
| 3743 } | |
| 3744 | |
| 3745 static Lisp_Object | |
| 3746 undecided_canonicalize (Lisp_Object codesys) | |
| 3747 { | |
| 3748 struct undecided_coding_system *csdata = | |
| 3749 XCODING_SYSTEM_TYPE_DATA (codesys, undecided); | |
| 3750 if (!csdata->do_eol && !csdata->do_coding) | |
| 3751 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs; | |
| 3752 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs)) | |
| 3753 return Fget_coding_system (Qconvert_eol_autodetect); | |
| 3754 return codesys; | |
| 3755 } | |
| 3756 | |
| 3757 static Bytecount | |
| 3758 undecided_convert (struct coding_stream *str, const UExtbyte *src, | |
| 3759 unsigned_char_dynarr *dst, Bytecount n) | |
| 3760 { | |
| 3761 int first_time = 0; | |
| 3762 | |
| 3763 if (str->direction == CODING_DECODE) | |
| 3764 { | |
| 3765 /* At this point, we have only the following possibilities: | |
| 3766 | |
| 3767 do_eol && do_coding | |
| 3768 do_coding only | |
| 3769 do_eol only and a coding system was specified | |
| 3770 | |
| 3771 Other possibilities are removed during undecided_canonicalize. | |
| 3772 | |
| 3773 Therefore, our substreams are either | |
| 3774 | |
| 3775 lstream_coding -> lstream_dynarr, or | |
| 3776 lstream_coding -> lstream_eol -> lstream_dynarr. | |
| 3777 */ | |
| 3778 struct undecided_coding_system *csdata = | |
| 3779 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided); | |
| 3780 struct undecided_coding_stream *data = | |
| 3781 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3782 | |
| 3783 if (str->eof) | |
| 3784 { | |
| 3785 /* Each will close the next. We need to close now because more | |
| 3786 data may be generated. */ | |
| 3787 if (data->c.initted) | |
| 3788 Lstream_close (XLSTREAM (data->c.lstreams[0])); | |
| 3789 return n; | |
| 3790 } | |
| 3791 | |
| 3792 if (!data->c.initted) | |
| 3793 { | |
| 3794 data->c.lstream_count = csdata->do_eol ? 3 : 2; | |
| 3795 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count); | |
| 3796 | |
| 3797 data->c.lstreams[data->c.lstream_count - 1] = | |
| 3798 make_dynarr_output_stream (dst); | |
| 3799 Lstream_set_buffering | |
| 3800 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3801 LSTREAM_UNBUFFERED, 0); | |
| 3802 if (csdata->do_eol) | |
| 3803 { | |
| 3804 data->c.lstreams[1] = | |
| 3805 make_coding_output_stream | |
| 3806 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]), | |
| 3807 Fget_coding_system (Qconvert_eol_autodetect), | |
| 800 | 3808 CODING_DECODE, 0); |
| 771 | 3809 Lstream_set_buffering |
| 3810 (XLSTREAM (data->c.lstreams[1]), | |
| 3811 LSTREAM_UNBUFFERED, 0); | |
| 3812 } | |
| 3813 | |
| 3814 data->c.lstreams[0] = | |
| 3815 make_coding_output_stream | |
| 3816 (XLSTREAM (data->c.lstreams[1]), | |
| 3817 /* Substitute binary if we need to detect the encoding */ | |
| 3818 csdata->do_coding ? Qbinary : csdata->cs, | |
| 800 | 3819 CODING_DECODE, 0); |
| 771 | 3820 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]), |
| 3821 LSTREAM_UNBUFFERED, 0); | |
| 3822 | |
| 3823 first_time = 1; | |
| 3824 data->c.initted = 1; | |
| 3825 } | |
| 3826 | |
| 3827 /* If necessary, do encoding-detection now. We do this when we're a | |
| 3828 writing stream or a non-seekable reading stream, meaning that we | |
| 3829 can't just process the whole input, rewind, and start over. */ | |
| 3830 | |
| 3831 if (csdata->do_coding) | |
| 3832 { | |
| 3833 int actual_was_nil = NILP (data->actual); | |
| 3834 if (NILP (data->actual)) | |
| 3835 { | |
| 3836 if (!data->st) | |
| 3837 data->st = allocate_detection_state (); | |
| 3838 if (first_time) | |
| 3839 /* #### This is cheesy. What we really ought to do is buffer | |
| 3840 up a certain minimum amount of data to get a better result. | |
| 3841 */ | |
| 3842 data->actual = look_for_coding_system_magic_cookie (src, n); | |
| 3843 if (NILP (data->actual)) | |
| 3844 { | |
| 3845 /* #### This is cheesy. What we really ought to do is buffer | |
| 3846 up a certain minimum amount of data so as to get a less | |
| 3847 random result when doing subprocess detection. */ | |
| 3848 detect_coding_type (data->st, src, n); | |
| 3849 data->actual = detected_coding_system (data->st); | |
| 3850 } | |
| 3851 } | |
| 3852 /* We need to set the detected coding system if we actually have | |
| 3853 such a coding system but didn't before. That is the case | |
| 3854 either when we just detected it in the previous code or when | |
| 3855 it was detected during undecided_init_coding_stream(). We | |
| 3856 can check for that using first_time. */ | |
| 3857 if (!NILP (data->actual) && (actual_was_nil || first_time)) | |
| 3858 { | |
| 3859 /* If the detected coding system doesn't allow for EOL | |
| 3860 autodetection, try to get the equivalent that does; | |
| 3861 otherwise, disable EOL detection (overriding whatever | |
| 3862 may already have been detected). */ | |
| 3863 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT) | |
| 3864 { | |
| 3865 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual))) | |
| 3866 data->actual = | |
| 3867 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual); | |
| 3868 else if (data->c.lstream_count == 3) | |
| 3869 set_coding_stream_coding_system | |
| 3870 (XLSTREAM (data->c.lstreams[1]), | |
| 3871 Fget_coding_system (Qidentity)); | |
| 3872 } | |
| 3873 set_coding_stream_coding_system | |
| 3874 (XLSTREAM (data->c.lstreams[0]), data->actual); | |
| 3875 } | |
| 3876 } | |
| 3877 | |
| 3878 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0) | |
| 3879 return -1; | |
| 3880 return n; | |
| 3881 } | |
| 3882 else | |
| 3883 return no_conversion_convert (str, src, dst, n); | |
| 3884 } | |
| 3885 | |
| 3886 static Lisp_Object | |
| 3887 undecided_canonicalize_after_coding (struct coding_stream *str) | |
| 3888 { | |
| 3889 struct undecided_coding_stream *data = | |
| 3890 CODING_STREAM_TYPE_DATA (str, undecided); | |
| 3891 Lisp_Object ret, eolret; | |
| 3892 | |
| 3893 if (str->direction == CODING_ENCODE) | |
| 3894 return str->codesys; | |
| 3895 | |
| 3896 if (!data->c.initted) | |
| 3897 return Fget_coding_system (Qundecided); | |
| 3898 | |
| 3899 ret = coding_stream_canonicalize_after_coding | |
| 3900 (XLSTREAM (data->c.lstreams[0])); | |
| 3901 if (NILP (ret)) | |
| 3902 ret = Fget_coding_system (Qundecided); | |
| 3903 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT) | |
| 3904 return ret; | |
| 3905 eolret = coding_stream_canonicalize_after_coding | |
| 3906 (XLSTREAM (data->c.lstreams[1])); | |
| 3907 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol)) | |
| 3908 return ret; | |
| 3909 return | |
| 3910 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret, | |
| 3911 Qsubtype)); | |
| 3912 } | |
| 3913 | |
| 3914 | |
| 3915 /************************************************************************/ | |
| 3916 /* Lisp interface: Coding category functions and detection */ | |
| 3917 /************************************************************************/ | |
| 3918 | |
| 3919 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /* | |
| 3920 Return a list of all recognized coding categories. | |
| 3921 */ | |
| 3922 ()) | |
| 3923 { | |
| 3924 int i; | |
| 3925 Lisp_Object list = Qnil; | |
| 3926 | |
| 3927 for (i = 0; i < coding_detector_count; i++) | |
| 3928 { | |
| 3929 detector_category_dynarr *cats = | |
| 3930 Dynarr_at (all_coding_detectors, i).cats; | |
| 3931 int j; | |
| 3932 | |
| 3933 for (j = 0; j < Dynarr_length (cats); j++) | |
| 3934 list = Fcons (Dynarr_at (cats, j).sym, list); | |
| 3935 } | |
| 3936 | |
| 3937 return Fnreverse (list); | |
| 3938 } | |
| 3939 | |
| 3940 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /* | |
| 3941 Change the priority order of the coding categories. | |
| 3942 LIST should be list of coding categories, in descending order of | |
| 3943 priority. Unspecified coding categories will be lower in priority | |
| 3944 than all specified ones, in the same relative order they were in | |
| 3945 previously. | |
| 3946 */ | |
| 3947 (list)) | |
| 3948 { | |
| 3949 int *category_to_priority = | |
| 3950 alloca_array (int, coding_detector_category_count); | |
| 3951 int i, j; | |
| 3952 | |
| 3953 /* First generate a list that maps coding categories to priorities. */ | |
| 3954 | |
| 3955 for (i = 0; i < coding_detector_category_count; i++) | |
| 3956 category_to_priority[i] = -1; | |
| 3957 | |
| 3958 /* Highest priority comes from the specified list. */ | |
| 3959 i = 0; | |
| 2367 | 3960 { |
| 3961 EXTERNAL_LIST_LOOP_2 (elt, list) | |
| 3962 { | |
| 3963 int cat = coding_category_symbol_to_id (elt); | |
| 3964 | |
| 3965 if (category_to_priority[cat] >= 0) | |
| 3966 sferror ("Duplicate coding category in list", elt); | |
| 3967 category_to_priority[cat] = i++; | |
| 3968 } | |
| 3969 } | |
| 771 | 3970 |
| 3971 /* Now go through the existing categories by priority to retrieve | |
| 3972 the categories not yet specified and preserve their priority | |
| 3973 order. */ | |
| 3974 for (j = 0; j < coding_detector_category_count; j++) | |
| 3975 { | |
| 3976 int cat = coding_category_by_priority[j]; | |
| 3977 if (category_to_priority[cat] < 0) | |
| 3978 category_to_priority[cat] = i++; | |
| 3979 } | |
| 3980 | |
| 3981 /* Now we need to construct the inverse of the mapping we just | |
| 3982 constructed. */ | |
| 3983 | |
| 3984 for (i = 0; i < coding_detector_category_count; i++) | |
| 3985 coding_category_by_priority[category_to_priority[i]] = i; | |
| 3986 | |
| 3987 /* Phew! That was confusing. */ | |
| 3988 return Qnil; | |
| 3989 } | |
| 3990 | |
| 3991 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /* | |
| 3992 Return a list of coding categories in descending order of priority. | |
| 3993 */ | |
| 3994 ()) | |
| 3995 { | |
| 3996 int i; | |
| 3997 Lisp_Object list = Qnil; | |
| 3998 | |
| 3999 for (i = 0; i < coding_detector_category_count; i++) | |
| 4000 list = | |
| 4001 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]), | |
| 4002 list); | |
| 4003 return Fnreverse (list); | |
| 4004 } | |
| 4005 | |
| 4006 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /* | |
| 4007 Change the coding system associated with a coding category. | |
| 4008 */ | |
| 4009 (coding_category, coding_system)) | |
| 4010 { | |
| 4011 coding_category_system[coding_category_symbol_to_id (coding_category)] = | |
| 4012 Fget_coding_system (coding_system); | |
| 4013 return Qnil; | |
| 4014 } | |
| 4015 | |
| 4016 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /* | |
| 4017 Return the coding system associated with a coding category. | |
| 4018 */ | |
| 4019 (coding_category)) | |
| 4020 { | |
| 4021 Lisp_Object sys = | |
| 4022 coding_category_system[coding_category_symbol_to_id (coding_category)]; | |
| 4023 | |
| 4024 if (!NILP (sys)) | |
| 4025 return XCODING_SYSTEM_NAME (sys); | |
| 4026 return Qnil; | |
| 4027 } | |
| 4028 | |
| 800 | 4029 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will |
| 4030 read through to the end of STREAM, leaving it there but open. */ | |
| 4031 | |
| 771 | 4032 Lisp_Object |
| 4033 detect_coding_stream (Lisp_Object stream) | |
| 4034 { | |
| 4035 Lisp_Object val = Qnil; | |
| 4036 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4037 UExtbyte random_buffer[65536]; | |
| 4038 Lisp_Object binary_instream = | |
| 4039 make_coding_input_stream | |
| 4040 (XLSTREAM (stream), Qbinary, | |
| 814 | 4041 CODING_ENCODE, LSTREAM_FL_NO_CLOSE_OTHER); |
| 771 | 4042 Lisp_Object decstream = |
| 4043 make_coding_input_stream | |
| 4044 (XLSTREAM (binary_instream), | |
| 800 | 4045 Qundecided, CODING_DECODE, 0); |
| 771 | 4046 Lstream *decstr = XLSTREAM (decstream); |
| 4047 | |
| 4048 GCPRO3 (decstream, stream, binary_instream); | |
| 4049 /* Read and discard all data; detection happens as a side effect of this, | |
| 4050 and we examine what was detected afterwards. */ | |
| 4051 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0) | |
| 4052 ; | |
| 4053 | |
| 4054 val = coding_stream_detected_coding_system (decstr); | |
| 4055 Lstream_close (decstr); | |
| 4056 Lstream_delete (decstr); | |
| 4057 Lstream_delete (XLSTREAM (binary_instream)); | |
| 4058 UNGCPRO; | |
| 4059 return val; | |
| 428 | 4060 } |
| 4061 | |
| 4062 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /* | |
| 4063 Detect coding system of the text in the region between START and END. | |
| 444 | 4064 Return a list of possible coding systems ordered by priority. |
| 3025 | 4065 If only ASCII characters are found, return `undecided' or one of |
| 428 | 4066 its subsidiary coding systems according to a detected end-of-line |
| 4067 type. Optional arg BUFFER defaults to the current buffer. | |
| 4068 */ | |
| 4069 (start, end, buffer)) | |
| 4070 { | |
| 4071 Lisp_Object val = Qnil; | |
| 4072 struct buffer *buf = decode_buffer (buffer, 0); | |
| 665 | 4073 Charbpos b, e; |
| 771 | 4074 Lisp_Object lb_instream; |
| 428 | 4075 |
| 4076 get_buffer_range_char (buf, start, end, &b, &e, 0); | |
| 4077 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0); | |
| 771 | 4078 |
| 4079 val = detect_coding_stream (lb_instream); | |
| 4080 Lstream_delete (XLSTREAM (lb_instream)); | |
| 428 | 4081 return val; |
| 4082 } | |
| 4083 | |
| 4084 | |
| 771 | 4085 |
| 4086 #ifdef DEBUG_XEMACS | |
| 4087 | |
| 428 | 4088 /************************************************************************/ |
| 771 | 4089 /* Internal methods */ |
| 4090 /************************************************************************/ | |
| 4091 | |
| 4092 /* Raw (internally-formatted) data. */ | |
| 4093 DEFINE_CODING_SYSTEM_TYPE (internal); | |
| 428 | 4094 |
| 665 | 4095 static Bytecount |
| 2286 | 4096 internal_convert (struct coding_stream *UNUSED (str), const UExtbyte *src, |
| 771 | 4097 unsigned_char_dynarr *dst, Bytecount n) |
| 4098 { | |
| 4099 Bytecount orign = n; | |
| 4100 Dynarr_add_many (dst, src, n); | |
| 4101 return orign; | |
| 4102 } | |
| 4103 | |
| 4104 #endif /* DEBUG_XEMACS */ | |
| 4105 | |
| 4106 | |
| 4107 | |
| 4108 #ifdef HAVE_ZLIB | |
| 4109 | |
| 4110 /************************************************************************/ | |
| 4111 /* Gzip methods */ | |
| 4112 /************************************************************************/ | |
| 4113 | |
| 4114 struct gzip_coding_system | |
| 428 | 4115 { |
| 771 | 4116 int level; /* 0 through 9, or -1 for default */ |
| 4117 }; | |
| 4118 | |
| 4119 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4120 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4121 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \ | |
| 4122 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level) | |
| 4123 | |
| 4124 struct gzip_coding_stream | |
| 428 | 4125 { |
| 771 | 4126 z_stream stream; |
| 4127 int stream_initted; | |
| 4128 int reached_eof; /* #### this should be handled by the caller, once we | |
| 4129 return LSTREAM_EOF */ | |
| 4130 }; | |
| 4131 | |
| 1204 | 4132 static const struct memory_description |
| 771 | 4133 gzip_coding_system_description[] = { |
| 4134 { XD_END } | |
| 4135 }; | |
| 4136 | |
| 1204 | 4137 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (gzip); |
| 4138 | |
| 771 | 4139 enum source_sink_type |
| 4140 gzip_conversion_end_type (Lisp_Object codesys) | |
| 4141 { | |
| 4142 return DECODES_BYTE_TO_BYTE; | |
| 428 | 4143 } |
| 4144 | |
| 4145 static void | |
| 771 | 4146 gzip_init (Lisp_Object codesys) |
| 4147 { | |
| 4148 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); | |
| 4149 data->level = -1; | |
| 4150 } | |
| 4151 | |
| 4152 static void | |
| 4153 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag) | |
| 428 | 4154 { |
| 771 | 4155 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip); |
| 4156 | |
| 826 | 4157 write_c_string (printcharfun, "("); |
| 771 | 4158 if (data->level == -1) |
| 826 | 4159 write_c_string (printcharfun, "default"); |
| 771 | 4160 else |
| 4161 print_internal (make_int (data->level), printcharfun, 0); | |
| 826 | 4162 write_c_string (printcharfun, ")"); |
| 428 | 4163 } |
| 4164 | |
| 4165 static int | |
| 771 | 4166 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value) |
| 428 | 4167 { |
| 771 | 4168 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip); |
| 4169 | |
| 4170 if (EQ (key, Qlevel)) | |
| 428 | 4171 { |
| 771 | 4172 if (EQ (value, Qdefault)) |
| 4173 data->level = -1; | |
| 4174 else | |
| 428 | 4175 { |
| 771 | 4176 CHECK_INT (value); |
| 4177 check_int_range (XINT (value), 0, 9); | |
| 4178 data->level = XINT (value); | |
| 428 | 4179 } |
| 4180 } | |
| 4181 else | |
| 771 | 4182 return 0; |
| 4183 return 1; | |
| 428 | 4184 } |
| 4185 | |
| 4186 static Lisp_Object | |
| 771 | 4187 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop) |
| 428 | 4188 { |
| 771 | 4189 struct gzip_coding_system *data = |
| 4190 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip); | |
| 4191 | |
| 4192 if (EQ (prop, Qlevel)) | |
| 428 | 4193 { |
| 771 | 4194 if (data->level == -1) |
| 4195 return Qdefault; | |
| 4196 return make_int (data->level); | |
| 428 | 4197 } |
| 771 | 4198 |
| 4199 return Qunbound; | |
| 428 | 4200 } |
| 4201 | |
| 4202 static void | |
| 771 | 4203 gzip_init_coding_stream (struct coding_stream *str) |
| 428 | 4204 { |
| 771 | 4205 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4206 if (data->stream_initted) | |
| 428 | 4207 { |
| 771 | 4208 if (str->direction == CODING_DECODE) |
| 4209 inflateEnd (&data->stream); | |
| 4210 else | |
| 4211 deflateEnd (&data->stream); | |
| 4212 data->stream_initted = 0; | |
| 428 | 4213 } |
| 771 | 4214 data->reached_eof = 0; |
| 428 | 4215 } |
| 4216 | |
| 4217 static void | |
| 771 | 4218 gzip_rewind_coding_stream (struct coding_stream *str) |
| 428 | 4219 { |
| 771 | 4220 gzip_init_coding_stream (str); |
| 428 | 4221 } |
| 4222 | |
| 771 | 4223 static Bytecount |
| 4224 gzip_convert (struct coding_stream *str, | |
| 4225 const UExtbyte *src, | |
| 4226 unsigned_char_dynarr *dst, Bytecount n) | |
| 428 | 4227 { |
| 771 | 4228 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip); |
| 4229 int zerr; | |
| 4230 if (str->direction == CODING_DECODE) | |
| 428 | 4231 { |
| 771 | 4232 if (data->reached_eof) |
| 4233 return n; /* eat the data */ | |
| 4234 | |
| 4235 if (!data->stream_initted) | |
| 428 | 4236 { |
| 771 | 4237 xzero (data->stream); |
| 4238 if (inflateInit (&data->stream) != Z_OK) | |
| 4239 return LSTREAM_ERROR; | |
| 4240 data->stream_initted = 1; | |
| 428 | 4241 } |
| 771 | 4242 |
| 4243 data->stream.next_in = (Bytef *) src; | |
| 4244 data->stream.avail_in = n; | |
| 4245 | |
| 4246 /* Normally we stop when we've fed all data to the decompressor; but | |
| 4247 if we're at the end of the input, and the decompressor hasn't | |
| 4248 reported EOF, we need to keep going, as there might be more output | |
| 4249 to generate. Z_OK from the decompressor means input was processed | |
| 4250 or output was generated; if neither, we break out of the loop. | |
| 4251 Other return values are: | |
| 4252 | |
| 4253 Z_STREAM_END EOF from decompressor | |
| 4254 Z_DATA_ERROR Corrupted data | |
| 4255 Z_BUF_ERROR No progress possible (this should happen if | |
| 4256 we try to feed it an incomplete file) | |
| 4257 Z_MEM_ERROR Out of memory | |
| 4258 Z_STREAM_ERROR (should never happen) | |
| 4259 Z_NEED_DICT (#### when will this happen?) | |
| 4260 */ | |
| 4261 while (data->stream.avail_in > 0 || str->eof) | |
| 4262 { | |
| 4263 /* Reserve an output buffer of the same size as the input buffer; | |
| 4264 if that's not enough, we keep reserving the same size. */ | |
| 4265 Bytecount reserved = n; | |
| 4266 Dynarr_add_many (dst, 0, reserved); | |
| 4267 /* Careful here! Don't retrieve the pointer until after | |
| 4268 reserving the space, or it might be bogus */ | |
| 4269 data->stream.next_out = | |
| 4270 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4271 data->stream.avail_out = reserved; | |
| 4272 zerr = inflate (&data->stream, Z_NO_FLUSH); | |
| 4273 /* Lop off the unused portion */ | |
| 4274 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4275 if (zerr != Z_OK) | |
| 4276 break; | |
| 4277 } | |
| 4278 | |
| 4279 if (zerr == Z_STREAM_END) | |
| 4280 data->reached_eof = 1; | |
| 4281 | |
| 4282 if ((Bytecount) data->stream.avail_in < n) | |
| 4283 return n - data->stream.avail_in; | |
| 4284 | |
| 4285 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4286 return 0; | |
| 4287 | |
| 4288 return LSTREAM_ERROR; | |
| 428 | 4289 } |
| 4290 else | |
| 4291 { | |
| 771 | 4292 if (!data->stream_initted) |
| 4293 { | |
| 4294 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys); | |
| 4295 xzero (data->stream); | |
| 4296 if (deflateInit (&data->stream, | |
| 4297 level == -1 ? Z_DEFAULT_COMPRESSION : level) != | |
| 4298 Z_OK) | |
| 4299 return LSTREAM_ERROR; | |
| 4300 data->stream_initted = 1; | |
| 428 | 4301 } |
| 771 | 4302 |
| 4303 data->stream.next_in = (Bytef *) src; | |
| 4304 data->stream.avail_in = n; | |
| 4305 | |
| 4306 /* Normally we stop when we've fed all data to the compressor; but if | |
| 4307 we're at the end of the input, and the compressor hasn't reported | |
| 4308 EOF, we need to keep going, as there might be more output to | |
| 4309 generate. (To signal EOF on our end, we set the FLUSH parameter | |
| 4310 to Z_FINISH; when all data is output, Z_STREAM_END will be | |
| 4311 returned.) Z_OK from the compressor means input was processed or | |
| 4312 output was generated; if neither, we break out of the loop. Other | |
| 4313 return values are: | |
| 4314 | |
| 4315 Z_STREAM_END EOF from compressor | |
| 4316 Z_BUF_ERROR No progress possible (should never happen) | |
| 4317 Z_STREAM_ERROR (should never happen) | |
| 4318 */ | |
| 4319 while (data->stream.avail_in > 0 || str->eof) | |
| 4320 { | |
| 4321 /* Reserve an output buffer of the same size as the input buffer; | |
| 4322 if that's not enough, we keep reserving the same size. */ | |
| 4323 Bytecount reserved = n; | |
| 4324 Dynarr_add_many (dst, 0, reserved); | |
| 4325 /* Careful here! Don't retrieve the pointer until after | |
| 4326 reserving the space, or it might be bogus */ | |
| 4327 data->stream.next_out = | |
| 4328 Dynarr_atp (dst, Dynarr_length (dst) - reserved); | |
| 4329 data->stream.avail_out = reserved; | |
| 4330 zerr = | |
| 4331 deflate (&data->stream, | |
| 4332 str->eof ? Z_FINISH : Z_NO_FLUSH); | |
| 4333 /* Lop off the unused portion */ | |
| 4334 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out); | |
| 4335 if (zerr != Z_OK) | |
| 4336 break; | |
| 4337 } | |
| 4338 | |
| 4339 if ((Bytecount) data->stream.avail_in < n) | |
| 4340 return n - data->stream.avail_in; | |
| 4341 | |
| 4342 if (zerr == Z_OK || zerr == Z_STREAM_END) | |
| 4343 return 0; | |
| 4344 | |
| 4345 return LSTREAM_ERROR; | |
| 428 | 4346 } |
| 4347 } | |
| 4348 | |
| 771 | 4349 #endif /* HAVE_ZLIB */ |
| 428 | 4350 |
| 4351 | |
| 4352 /************************************************************************/ | |
| 4353 /* Initialization */ | |
| 4354 /************************************************************************/ | |
| 4355 | |
| 4356 void | |
| 4357 syms_of_file_coding (void) | |
| 4358 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
4359 INIT_LISP_OBJECT (coding_system); |
| 442 | 4360 |
| 771 | 4361 DEFSUBR (Fvalid_coding_system_type_p); |
| 4362 DEFSUBR (Fcoding_system_type_list); | |
| 428 | 4363 DEFSUBR (Fcoding_system_p); |
| 4364 DEFSUBR (Ffind_coding_system); | |
| 4365 DEFSUBR (Fget_coding_system); | |
| 4366 DEFSUBR (Fcoding_system_list); | |
| 4367 DEFSUBR (Fcoding_system_name); | |
| 4368 DEFSUBR (Fmake_coding_system); | |
| 4369 DEFSUBR (Fcopy_coding_system); | |
| 440 | 4370 DEFSUBR (Fcoding_system_canonical_name_p); |
| 4371 DEFSUBR (Fcoding_system_alias_p); | |
| 4372 DEFSUBR (Fcoding_system_aliasee); | |
| 428 | 4373 DEFSUBR (Fdefine_coding_system_alias); |
| 4374 DEFSUBR (Fsubsidiary_coding_system); | |
| 771 | 4375 DEFSUBR (Fcoding_system_base); |
| 4376 DEFSUBR (Fcoding_system_used_for_io); | |
| 428 | 4377 |
| 4378 DEFSUBR (Fcoding_system_type); | |
| 771 | 4379 DEFSUBR (Fcoding_system_description); |
| 428 | 4380 DEFSUBR (Fcoding_system_property); |
| 4381 | |
| 4382 DEFSUBR (Fcoding_category_list); | |
| 4383 DEFSUBR (Fset_coding_priority_list); | |
| 4384 DEFSUBR (Fcoding_priority_list); | |
| 4385 DEFSUBR (Fset_coding_category_system); | |
| 4386 DEFSUBR (Fcoding_category_system); | |
| 4387 | |
| 4388 DEFSUBR (Fdetect_coding_region); | |
| 4389 DEFSUBR (Fdecode_coding_region); | |
| 4390 DEFSUBR (Fencode_coding_region); | |
| 563 | 4391 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp); |
| 4392 DEFSYMBOL (Qno_conversion); | |
| 771 | 4393 DEFSYMBOL (Qconvert_eol); |
| 4394 DEFSYMBOL (Qconvert_eol_autodetect); | |
| 4395 DEFSYMBOL (Qconvert_eol_lf); | |
| 4396 DEFSYMBOL (Qconvert_eol_cr); | |
| 4397 DEFSYMBOL (Qconvert_eol_crlf); | |
| 563 | 4398 DEFSYMBOL (Qraw_text); |
| 771 | 4399 |
| 563 | 4400 DEFSYMBOL (Qmnemonic); |
| 4401 DEFSYMBOL (Qeol_type); | |
| 4402 DEFSYMBOL (Qpost_read_conversion); | |
| 4403 DEFSYMBOL (Qpre_write_conversion); | |
| 4404 | |
| 771 | 4405 DEFSYMBOL (Qtranslation_table_for_decode); |
| 4406 DEFSYMBOL (Qtranslation_table_for_encode); | |
| 4407 DEFSYMBOL (Qsafe_chars); | |
| 4408 DEFSYMBOL (Qsafe_charsets); | |
| 4409 DEFSYMBOL (Qmime_charset); | |
| 4410 DEFSYMBOL (Qvalid_codes); | |
| 4411 | |
| 563 | 4412 DEFSYMBOL (Qcr); |
| 4413 DEFSYMBOL (Qlf); | |
| 4414 DEFSYMBOL (Qcrlf); | |
| 4415 DEFSYMBOL (Qeol_cr); | |
| 4416 DEFSYMBOL (Qeol_lf); | |
| 4417 DEFSYMBOL (Qeol_crlf); | |
| 4418 DEFSYMBOL (Qencode); | |
| 4419 DEFSYMBOL (Qdecode); | |
| 428 | 4420 |
| 771 | 4421 DEFSYMBOL (Qnear_certainty); |
| 4422 DEFSYMBOL (Qquite_probable); | |
| 4423 DEFSYMBOL (Qsomewhat_likely); | |
| 1494 | 4424 DEFSYMBOL (Qslightly_likely); |
| 771 | 4425 DEFSYMBOL (Qas_likely_as_unlikely); |
| 4426 DEFSYMBOL (Qsomewhat_unlikely); | |
| 4427 DEFSYMBOL (Qquite_improbable); | |
| 4428 DEFSYMBOL (Qnearly_impossible); | |
| 4429 | |
| 4430 DEFSYMBOL (Qdo_eol); | |
| 4431 DEFSYMBOL (Qdo_coding); | |
| 4432 | |
| 4433 DEFSYMBOL (Qcanonicalize_after_coding); | |
| 4434 | |
| 4435 DEFSYMBOL (Qescape_quoted); | |
| 4436 | |
| 4437 #ifdef HAVE_ZLIB | |
| 4438 DEFSYMBOL (Qgzip); | |
| 4439 #endif | |
| 4440 | |
| 428 | 4441 } |
| 4442 | |
| 4443 void | |
| 4444 lstream_type_create_file_coding (void) | |
| 4445 { | |
| 771 | 4446 LSTREAM_HAS_METHOD (coding, reader); |
| 4447 LSTREAM_HAS_METHOD (coding, writer); | |
| 4448 LSTREAM_HAS_METHOD (coding, rewinder); | |
| 4449 LSTREAM_HAS_METHOD (coding, seekable_p); | |
| 4450 LSTREAM_HAS_METHOD (coding, marker); | |
| 4451 LSTREAM_HAS_METHOD (coding, flusher); | |
| 4452 LSTREAM_HAS_METHOD (coding, closer); | |
| 4453 LSTREAM_HAS_METHOD (coding, finalizer); | |
| 4454 } | |
| 4455 | |
| 4456 void | |
| 4457 coding_system_type_create (void) | |
| 4458 { | |
| 4459 int i; | |
| 4460 | |
| 4461 staticpro (&Vcoding_system_hash_table); | |
| 4462 Vcoding_system_hash_table = | |
| 4463 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ); | |
| 4464 | |
| 4465 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry); | |
| 2367 | 4466 dump_add_root_block_ptr (&the_coding_system_type_entry_dynarr, |
| 771 | 4467 &csted_description); |
| 4468 | |
| 4469 Vcoding_system_type_list = Qnil; | |
| 4470 staticpro (&Vcoding_system_type_list); | |
| 4471 | |
| 4472 /* Initialize to something reasonable ... */ | |
| 4473 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++) | |
| 4474 { | |
| 4475 coding_category_system[i] = Qnil; | |
| 1204 | 4476 dump_add_root_lisp_object (&coding_category_system[i]); |
| 771 | 4477 coding_category_by_priority[i] = i; |
| 4478 } | |
| 4479 | |
| 4480 dump_add_opaque (coding_category_by_priority, | |
| 4481 sizeof (coding_category_by_priority)); | |
| 4482 | |
| 4483 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector); | |
| 2367 | 4484 dump_add_root_block_ptr (&all_coding_detectors, |
| 771 | 4485 &detector_dynarr_description); |
| 4486 | |
| 4487 dump_add_opaque_int (&coding_system_tick); | |
| 4488 dump_add_opaque_int (&coding_detector_count); | |
| 4489 dump_add_opaque_int (&coding_detector_category_count); | |
| 4490 | |
| 4491 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion, | |
| 4492 "no-conversion-coding-system-p"); | |
| 4493 CODING_SYSTEM_HAS_METHOD (no_conversion, convert); | |
| 4494 | |
| 4495 INITIALIZE_DETECTOR (no_conversion); | |
| 4496 DETECTOR_HAS_METHOD (no_conversion, detect); | |
| 4497 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion); | |
| 4498 | |
| 4499 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol, | |
| 4500 "convert-eol-coding-system-p"); | |
| 4501 CODING_SYSTEM_HAS_METHOD (convert_eol, print); | |
| 4502 CODING_SYSTEM_HAS_METHOD (convert_eol, convert); | |
| 4503 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop); | |
| 4504 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop); | |
| 4505 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type); | |
| 4506 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding); | |
| 4507 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream); | |
| 4508 | |
| 4509 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided, | |
| 4510 "undecided-coding-system-p"); | |
| 4511 CODING_SYSTEM_HAS_METHOD (undecided, init); | |
| 4512 CODING_SYSTEM_HAS_METHOD (undecided, mark); | |
| 4513 CODING_SYSTEM_HAS_METHOD (undecided, print); | |
| 4514 CODING_SYSTEM_HAS_METHOD (undecided, convert); | |
| 4515 CODING_SYSTEM_HAS_METHOD (undecided, putprop); | |
| 4516 CODING_SYSTEM_HAS_METHOD (undecided, getprop); | |
| 4517 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream); | |
| 4518 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream); | |
| 4519 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream); | |
| 4520 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream); | |
| 4521 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize); | |
| 4522 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding); | |
| 4523 | |
| 4524 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p"); | |
| 4525 | |
| 4526 CODING_SYSTEM_HAS_METHOD (chain, print); | |
| 4527 CODING_SYSTEM_HAS_METHOD (chain, canonicalize); | |
| 4528 CODING_SYSTEM_HAS_METHOD (chain, init); | |
| 4529 CODING_SYSTEM_HAS_METHOD (chain, mark); | |
| 4530 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream); | |
| 4531 CODING_SYSTEM_HAS_METHOD (chain, convert); | |
| 4532 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream); | |
| 4533 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream); | |
| 4534 CODING_SYSTEM_HAS_METHOD (chain, finalize); | |
| 4535 CODING_SYSTEM_HAS_METHOD (chain, putprop); | |
| 4536 CODING_SYSTEM_HAS_METHOD (chain, getprop); | |
| 4537 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type); | |
| 4538 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding); | |
| 4539 | |
| 4540 #ifdef DEBUG_XEMACS | |
| 4541 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p"); | |
| 4542 CODING_SYSTEM_HAS_METHOD (internal, convert); | |
| 4543 #endif | |
| 4544 | |
| 4545 #ifdef HAVE_ZLIB | |
| 4546 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p"); | |
| 4547 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type); | |
| 4548 CODING_SYSTEM_HAS_METHOD (gzip, convert); | |
| 4549 CODING_SYSTEM_HAS_METHOD (gzip, init); | |
| 4550 CODING_SYSTEM_HAS_METHOD (gzip, print); | |
| 4551 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream); | |
| 4552 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream); | |
| 4553 CODING_SYSTEM_HAS_METHOD (gzip, putprop); | |
| 4554 CODING_SYSTEM_HAS_METHOD (gzip, getprop); | |
| 4555 #endif | |
| 4556 } | |
| 4557 | |
| 4558 void | |
| 4559 reinit_coding_system_type_create (void) | |
| 4560 { | |
| 4561 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion); | |
| 4562 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol); | |
| 4563 REINITIALIZE_CODING_SYSTEM_TYPE (undecided); | |
| 4564 REINITIALIZE_CODING_SYSTEM_TYPE (chain); | |
| 4565 #if 0 | |
| 4566 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper); | |
| 4567 #endif /* 0 */ | |
| 4568 #ifdef DEBUG_XEMACS | |
| 4569 REINITIALIZE_CODING_SYSTEM_TYPE (internal); | |
| 4570 #endif | |
| 4571 #ifdef HAVE_ZLIB | |
| 4572 REINITIALIZE_CODING_SYSTEM_TYPE (gzip); | |
| 4573 #endif | |
| 4574 } | |
| 4575 | |
| 4576 void | |
| 4577 reinit_vars_of_file_coding (void) | |
| 4578 { | |
| 428 | 4579 } |
| 4580 | |
| 4581 void | |
| 4582 vars_of_file_coding (void) | |
| 4583 { | |
| 771 | 4584 /* We always have file-coding support */ |
| 428 | 4585 Fprovide (intern ("file-coding")); |
| 4586 | |
| 1347 | 4587 QScoding_system_cookie = build_string (";;;###coding system: "); |
| 4588 staticpro (&QScoding_system_cookie); | |
| 4589 | |
| 1242 | 4590 #ifdef HAVE_DEFAULT_EOL_DETECTION |
| 2297 | 4591 /* #### Find a more appropriate place for this comment. |
| 4592 WARNING: The existing categories are intimately tied to the function | |
| 1242 | 4593 `coding-system-category' in coding.el. If you change a category, or |
| 4594 change the layout of any coding system associated with a category, you | |
| 4595 need to check that function and make sure it's written properly. */ | |
| 4596 | |
| 4597 Fprovide (intern ("unix-default-eol-detection")); | |
| 4598 #endif | |
| 4599 | |
| 428 | 4600 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /* |
| 4601 Coding system used for TTY keyboard input. | |
| 4602 Not used under a windowing system. | |
| 4603 */ ); | |
| 4604 Vkeyboard_coding_system = Qnil; | |
| 4605 | |
| 4606 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /* | |
| 4607 Coding system used for TTY display output. | |
| 4608 Not used under a windowing system. | |
| 4609 */ ); | |
| 4610 Vterminal_coding_system = Qnil; | |
| 4611 | |
| 4612 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /* | |
| 440 | 4613 Overriding coding system used when reading from a file or process. |
| 4614 You should bind this variable with `let', but do not set it globally. | |
| 4615 If this is non-nil, it specifies the coding system that will be used | |
| 4616 to decode input on read operations, such as from a file or process. | |
| 4617 It overrides `buffer-file-coding-system-for-read', | |
| 428 | 4618 `insert-file-contents-pre-hook', etc. Use those variables instead of |
| 440 | 4619 this one for permanent changes to the environment. */ ); |
| 428 | 4620 Vcoding_system_for_read = Qnil; |
| 4621 | |
| 4622 DEFVAR_LISP ("coding-system-for-write", | |
| 4623 &Vcoding_system_for_write /* | |
| 440 | 4624 Overriding coding system used when writing to a file or process. |
| 4625 You should bind this variable with `let', but do not set it globally. | |
| 4626 If this is non-nil, it specifies the coding system that will be used | |
| 4627 to encode output for write operations, such as to a file or process. | |
| 4628 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc. | |
| 4629 Use those variables instead of this one for permanent changes to the | |
| 4630 environment. */ ); | |
| 428 | 4631 Vcoding_system_for_write = Qnil; |
| 4632 | |
| 4633 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /* | |
| 4634 Coding system used to convert pathnames when accessing files. | |
| 4635 */ ); | |
| 4636 Vfile_name_coding_system = Qnil; | |
| 4637 | |
| 4638 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /* | |
| 771 | 4639 Setting this has no effect. It is purely for FSF compatibility. |
| 428 | 4640 */ ); |
| 4641 enable_multibyte_characters = 1; | |
| 771 | 4642 |
| 4643 Vchain_canonicalize_hash_table = | |
| 4644 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL); | |
| 4645 staticpro (&Vchain_canonicalize_hash_table); | |
| 4646 | |
| 4647 #ifdef DEBUG_XEMACS | |
| 4648 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /* | |
| 4649 If non-nil, display debug information about detection operations in progress. | |
| 4650 Information is displayed on stderr. | |
| 4651 */ ); | |
| 4652 Vdebug_coding_detection = Qnil; | |
| 4653 #endif | |
| 428 | 4654 } |
| 4655 | |
| 2297 | 4656 /* #### reformat this for consistent appearance? */ |
| 4657 | |
| 428 | 4658 void |
| 4659 complex_vars_of_file_coding (void) | |
| 4660 { | |
| 771 | 4661 Fmake_coding_system |
| 4662 (Qconvert_eol_cr, Qconvert_eol, | |
| 4663 build_msg_string ("Convert CR to LF"), | |
| 4664 nconc2 (list6 (Qdocumentation, | |
| 4665 build_msg_string ( | |
| 4666 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4667 "(used internally and under Unix to mark the end of a line)."), | |
| 4668 Qmnemonic, build_string ("CR->LF"), | |
| 4669 Qsubtype, Qcr), | |
| 4670 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4671 subsidiaries -- it needs the coding systems we're creating | |
| 4672 to do so! */ | |
| 4673 list2 (Qeol_type, Qlf))); | |
| 4674 | |
| 4675 Fmake_coding_system | |
| 4676 (Qconvert_eol_lf, Qconvert_eol, | |
| 4677 build_msg_string ("Convert LF to LF (do nothing)"), | |
| 4678 nconc2 (list6 (Qdocumentation, | |
| 4679 build_msg_string ( | |
| 4680 "Do nothing."), | |
| 4681 Qmnemonic, build_string ("LF->LF"), | |
| 4682 Qsubtype, Qlf), | |
| 4683 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4684 subsidiaries -- it needs the coding systems we're creating | |
| 4685 to do so! */ | |
| 4686 list2 (Qeol_type, Qlf))); | |
| 4687 | |
| 4688 Fmake_coding_system | |
| 4689 (Qconvert_eol_crlf, Qconvert_eol, | |
| 4690 build_msg_string ("Convert CRLF to LF"), | |
| 4691 nconc2 (list6 (Qdocumentation, | |
| 4692 build_msg_string ( | |
| 4693 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n" | |
| 4694 "(used internally and under Unix to mark the end of a line)."), | |
| 4695 Qmnemonic, build_string ("CRLF->LF"), | |
| 4696 Qsubtype, Qcrlf), | |
| 4697 /* VERY IMPORTANT! Tell make-coding-system not to generate | |
| 4698 subsidiaries -- it needs the coding systems we're creating | |
| 4699 to do so! */ | |
| 4700 list2 (Qeol_type, Qlf))); | |
| 4701 | |
| 4702 Fmake_coding_system | |
| 4703 (Qconvert_eol_autodetect, Qconvert_eol, | |
| 4704 build_msg_string ("Autodetect EOL type"), | |
| 4705 nconc2 (list6 (Qdocumentation, | |
| 4706 build_msg_string ( | |
| 4707 "Autodetect the end-of-line type."), | |
| 4708 Qmnemonic, build_string ("Auto-EOL"), | |
| 793 | 4709 Qsubtype, Qnil), |
| 771 | 4710 /* VERY IMPORTANT! Tell make-coding-system not to generate |
| 4711 subsidiaries -- it needs the coding systems we're creating | |
| 4712 to do so! */ | |
| 4713 list2 (Qeol_type, Qlf))); | |
| 4714 | |
| 4715 Fmake_coding_system | |
| 4716 (Qundecided, Qundecided, | |
| 4717 build_msg_string ("Undecided (auto-detect)"), | |
| 4718 nconc2 (list4 (Qdocumentation, | |
| 4719 build_msg_string | |
| 4720 ("Automatically detects the correct encoding."), | |
| 4721 Qmnemonic, build_string ("Auto")), | |
| 4722 list6 (Qdo_eol, Qt, Qdo_coding, Qt, | |
| 4723 /* We do EOL detection ourselves so we don't need to be | |
| 4724 wrapped in an EOL detector. (It doesn't actually hurt, | |
| 4725 though, I don't think.) */ | |
| 4726 Qeol_type, Qlf))); | |
| 4727 | |
| 4728 Fmake_coding_system | |
| 4729 (intern ("undecided-dos"), Qundecided, | |
| 4730 build_msg_string ("Undecided (auto-detect) (CRLF)"), | |
| 4731 nconc2 (list4 (Qdocumentation, | |
| 4732 build_msg_string | |
| 4733 ("Automatically detects the correct encoding; EOL type of CRLF forced."), | |
| 4734 Qmnemonic, build_string ("Auto")), | |
| 4735 list4 (Qdo_coding, Qt, | |
| 4736 Qeol_type, Qcrlf))); | |
| 4737 | |
| 4738 Fmake_coding_system | |
| 4739 (intern ("undecided-unix"), Qundecided, | |
| 4740 build_msg_string ("Undecided (auto-detect) (LF)"), | |
| 4741 nconc2 (list4 (Qdocumentation, | |
| 4742 build_msg_string | |
| 4743 ("Automatically detects the correct encoding; EOL type of LF forced."), | |
| 4744 Qmnemonic, build_string ("Auto")), | |
| 4745 list4 (Qdo_coding, Qt, | |
| 4746 Qeol_type, Qlf))); | |
| 4747 | |
| 4748 Fmake_coding_system | |
| 4749 (intern ("undecided-mac"), Qundecided, | |
| 4750 build_msg_string ("Undecided (auto-detect) (CR)"), | |
| 4751 nconc2 (list4 (Qdocumentation, | |
| 4752 build_msg_string | |
| 4753 ("Automatically detects the correct encoding; EOL type of CR forced."), | |
| 4754 Qmnemonic, build_string ("Auto")), | |
| 4755 list4 (Qdo_coding, Qt, | |
| 4756 Qeol_type, Qcr))); | |
| 4757 | |
| 428 | 4758 /* Need to create this here or we're really screwed. */ |
| 4759 Fmake_coding_system | |
| 4760 (Qraw_text, Qno_conversion, | |
| 771 | 4761 build_msg_string ("Raw Text"), |
| 4762 list4 (Qdocumentation, | |
| 4763 build_msg_string ("Raw text converts only line-break codes, and acts otherwise like `binary'."), | |
| 4764 Qmnemonic, build_string ("Raw"))); | |
| 428 | 4765 |
| 4766 Fmake_coding_system | |
| 4767 (Qbinary, Qno_conversion, | |
| 771 | 4768 build_msg_string ("Binary"), |
| 4769 list6 (Qdocumentation, | |
| 4770 build_msg_string ( | |
| 4771 "This coding system is as close as it comes to doing no conversion.\n" | |
| 4772 "On input, each byte is converted directly into the character\n" | |
| 4773 "with the corresponding code -- i.e. from the `ascii', `control-1',\n" | |
| 4774 "or `latin-1' character sets. On output, these characters are\n" | |
| 4775 "converted back to the corresponding bytes, and other characters\n" | |
| 4776 "are converted to the default character, i.e. `~'."), | |
| 4777 Qeol_type, Qlf, | |
| 428 | 4778 Qmnemonic, build_string ("Binary"))); |
| 4779 | |
| 771 | 4780 /* Formerly aliased to raw-text! Completely bogus and not even the same |
| 4781 as FSF Emacs. */ | |
| 4782 Fdefine_coding_system_alias (Qno_conversion, Qbinary); | |
| 4783 Fdefine_coding_system_alias (intern ("no-conversion-unix"), | |
| 4784 intern ("raw-text-unix")); | |
| 4785 Fdefine_coding_system_alias (intern ("no-conversion-dos"), | |
| 4786 intern ("raw-text-dos")); | |
| 4787 Fdefine_coding_system_alias (intern ("no-conversion-mac"), | |
| 4788 intern ("raw-text-mac")); | |
| 4789 | |
| 1318 | 4790 /* These three below will get their defaults set correctly |
| 4791 in code-init.el. We init them now so we can handle stuff at dump | |
| 771 | 4792 time before we get to code-init.el. */ |
| 1318 | 4793 Fdefine_coding_system_alias (Qnative, Qbinary); |
| 440 | 4794 Fdefine_coding_system_alias (Qterminal, Qbinary); |
| 4795 Fdefine_coding_system_alias (Qkeyboard, Qbinary); | |
| 4796 | |
| 1318 | 4797 Fdefine_coding_system_alias (Qfile_name, Qnative); |
| 771 | 4798 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf); |
| 4799 | |
| 428 | 4800 /* Need this for bootstrapping */ |
| 771 | 4801 coding_category_system[detector_category_no_conversion] = |
| 428 | 4802 Fget_coding_system (Qraw_text); |
| 4803 } |