1;;; codepage.el --- MS-DOS/MS-Windows specific coding systems 2 3;; Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc. 4;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 5;; National Institute of Advanced Industrial Science and Technology (AIST) 6;; Registration Number H14PRO021 7 8;; Author: Eli Zaretskii 9;; Maintainer: FSF 10;; Keywords: i18n ms-dos ms-windows codepage 11 12;; This file is part of GNU Emacs. 13 14;; GNU Emacs is free software; you can redistribute it and/or modify 15;; it under the terms of the GNU General Public License as published by 16;; the Free Software Foundation; either version 2, or (at your option) 17;; any later version. 18 19;; GNU Emacs is distributed in the hope that it will be useful, 20;; but WITHOUT ANY WARRANTY; without even the implied warranty of 21;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22;; GNU General Public License for more details. 23 24;; You should have received a copy of the GNU General Public License 25;; along with GNU Emacs; see the file COPYING. If not, write to the 26;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 27;; Boston, MA 02110-1301, USA. 28 29;;; Commentary: 30 31;; Special coding systems for DOS/Windows codepage support. 32;; 33;; These coding systems perform conversion from the DOS/Windows 34;; codepage encoding to one of the ISO-8859 character sets. Each 35;; codepage has its corresponding ISO-8859 charset, chosen so as to be 36;; able to convert all (or most) of the characters. The idea is that 37;; Emacs internally works with the usual MULE charsets, and the 38;; conversion to and from the DOS codepage is performed on I/O only. 39;; See term/internal.el for the complementary setup of the DOS 40;; terminal display and input methods. 41;; 42;; Thanks to Ken'ichi Handa <handa@etl.go.jp> for writing the CCL 43;; encoders/decoders, and for help in debugging this code. 44 45;;; Code: 46 47(defvar dos-unsupported-char-glyph) 48 49(defun cp-coding-system-for-codepage-1 (coding mnemonic iso-name 50 decoder encoder) 51 "Make coding system CODING for a DOS codepage using translation tables. 52MNEMONIC is a character to be displayed on mode line for the coding system. 53ISO-NAME is the name of the ISO-8859 charset which corresponds to this 54codepage. 55DECODER is a translation table for converting characters in the DOS codepage 56encoding to Emacs multibyte characters. 57ENCODER is a translation table for encoding Emacs multibyte characters into 58external DOS codepage codes." 59 (save-match-data 60 (let* ((coding-name (symbol-name coding)) 61 (undef (if (eq system-type 'ms-dos) 62 (if dos-unsupported-char-glyph 63 (logand dos-unsupported-char-glyph 255) 64 127) 65 ??)) 66 (safe-chars (make-char-table 'safe-chars)) 67 (ccl-decoder 68 (ccl-compile 69 ;; The 4 here supplies the buf_magnification parameter 70 ;; for the CCL program. A multibyte character may take 71 ;; at most 4-bytes. 72 `(4 (loop (read r1) 73 (if (r1 >= 128) 74 ((r0 = ,(charset-id 'ascii)) 75 (translate-character ,decoder r0 r1) 76 (write-multibyte-character r0 r1)) 77 (write r1)) 78 (repeat))))) 79 (ccl-encoder 80 (ccl-compile 81 ;; The 2 here supplies the buf_magnification parameter for 82 ;; the CCL program. Since the -dos coding system generates 83 ;; \r\n for each \n, a factor of 2 covers even the worst case 84 ;; of empty lines with a single \n. 85 `(2 (loop (read-multibyte-character r0 r1) 86 (if (r0 != ,(charset-id 'ascii)) 87 ((translate-character ,encoder r0 r1) 88 (if (r0 == ,(charset-id 'japanese-jisx0208)) 89 ((r1 = ,undef) 90 (write r1))))) 91 (write-repeat r1)))))) 92 93 ;; Set elements of safe multibyte characters for this codepage 94 ;; to t in the char-table safe-chars. 95 (let ((tbl (get decoder 'translation-table)) 96 (i 128) 97 ch) 98 (while (< i 256) 99 (setq ch (aref tbl i)) 100 (if ch (aset safe-chars ch t)) 101 (setq i (1+ i)))) 102 103 ;; Make coding system CODING. 104 (make-coding-system 105 coding 4 mnemonic 106 (concat "8-bit encoding of " (symbol-name iso-name) 107 " characters using IBM codepage " coding-name) 108 (cons ccl-decoder ccl-encoder) 109 `((safe-charsets ascii eight-bit-control eight-bit-graphic ,iso-name) 110 (safe-chars . ,safe-chars) 111 (valid-codes (0 . 255))))))) 112 113(defun cp-decoding-vector-for-codepage (table charset offset) 114 "Create a vector for decoding IBM PC characters using conversion table 115TABLE into an ISO-8859 character set CHARSET whose first non-ASCII 116character is generated by (make-char CHARSET OFFSET)." 117 (let* ((len (length table)) 118 (undefined-char 119 (if (eq system-type 'ms-dos) 120 (if dos-unsupported-char-glyph 121 (logand dos-unsupported-char-glyph 255) 122 127) 123 32)) 124 (vec1 (make-vector 256 undefined-char)) 125 (i 0)) 126 (while (< i 256) 127 (aset vec1 i i) 128 (setq i (1+ i))) 129 (setq i 0) 130 (while (< i len) 131 (if (aref table i) 132 (aset vec1 (aref table i) (make-char charset (+ i offset)))) 133 (setq i (1+ i))) 134 vec1)) 135 136;;; You don't think I created all these tables below by hand, do you? 137;;; The following Awk script will create the table for cp850-to-Latin-1 138;;; conversion from the RFC 1345 file (the other tables are left as an 139;;; excercise): 140;;; BEGIN { n_pages = 11; 141;;; pn["IBM437"] = 0; pn["IBM850"] = 1; pn["IBM851"] = 2; 142;;; pn["IBM852"] = 3; pn["IBM855"] = 4; pn["IBM860"] = 5; 143;;; pn["IBM861"] = 6; pn["IBM862"] = 7; pn["IBM863"] = 8; 144;;; pn["IBM864"] = 9; pn["IBM865"] = 10; 145;;; } 146;;; $1 == "&charset" { charset = $2; } 147;;; $1 == "&code" { code = $2; } 148;;; /^ [^&]/ { 149;;; if ((charset ~ /^IBM(437|8(5[0125]|6[0-5]))$/) || (charset ~ /^ISO_8859-1/)) 150;;; { 151;;; for (i = 1; i <= NF; i++) 152;;; chars[charset,code++] = $i; 153;;; } 154;;; } 155;;; 156;;; END { 157;;; for (i = 160; i < 256; i++) 158;;; { 159;;; c = chars["ISO_8859-1:1987",i]; 160;;; if (c == "??") # skip unused positions 161;;; { 162;;; printf " nil"; 163;;; if ((i - 159)%16 == 0) 164;;; printf "\n"; 165;;; continue; 166;;; } 167;;; found = 0; 168;;; for (j in pn) 169;;; map[j] = "nil"; 170;;; for (combined in chars) 171;;; { 172;;; candidate = chars[combined]; 173;;; split (combined, separate, SUBSEP); 174;;; if (separate[1] == "IBM850" && candidate == c) 175;;; { 176;;; found = 1; 177;;; map[separate[1]] = separate[2]; 178;;; } 179;;; } 180;;; printf " %s", map["IBM850"]; 181;;; if ((i - 159)%16 == 0) 182;;; printf "\n"; 183;;; } 184;;; } 185 186;;; WARNING WARNING WARNING!!! 187;;; 188;;; If you want to get fancy with these tables, remember that the inverse 189;;; tables, created by `cp-decoding-vector-for-codepage' above, are installed 190;;; on MS-DOS as nonascii-translation-table (see `dos-codepage-setup' on 191;;; internal.el). Therefore, you should NOT put any codes below 128 in 192;;; these tables! Otherwise, various Emacs commands and functions will 193;;; mysteriously fail! For example, a typical screwup is to map the Latin-N 194;;; acute accent character to the apostrophe, and have all regexps which 195;;; end with "\\'" begin to fail (e.g., the automatic setting of the major 196;;; mode by file name extension will stop working). 197;;; 198;;; You HAVE BEEN warned! 199 200;; US/English/PC-8/IBM-2. This doesn't support Latin-1 characters very 201;; well, but why not use what we can salvage? 202(defvar cp437-decode-table 203 ;; Nth element is the code of a cp437 glyph for the multibyte 204 ;; character created by (make-char 'latin-iso8859-1 (+ N 160)). 205 ;; The element nil means there's no corresponding cp437 glyph. 206 [ 207 255 173 155 156 nil 157 179 nil nil nil 166 174 170 196 nil nil 208 248 241 253 nil nil nil nil 249 nil nil 167 175 172 171 nil 168 209 nil nil nil nil 142 143 146 128 nil 144 nil nil nil nil nil nil 210 nil 165 nil nil nil nil 153 nil nil nil nil nil 154 nil nil 225 211 133 160 131 nil 132 134 145 135 138 130 136 137 141 161 140 139 212 nil 164 149 162 147 nil 148 246 nil 151 163 150 129 nil nil 152] 213 "Table for converting ISO-8859-1 characters into codepage 437 glyphs.") 214(setplist 'cp437-decode-table 215 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 216 217;; Multilingual (Latin-1) 218(defvar cp850-decode-table 219 ;; Nth element is the code of a cp850 glyph for the multibyte 220 ;; character created by (make-char 'latin-iso8859-1 (+ N 160)). 221 ;; The element nil means there's no corresponding cp850 glyph. 222 [ 223 255 173 189 156 207 190 221 245 249 184 166 174 170 240 169 238 224 248 241 253 252 239 230 244 250 247 251 167 175 172 171 243 168 225 183 181 182 199 142 143 146 128 212 144 210 211 222 214 215 216 226 209 165 227 224 226 229 153 158 157 235 233 234 154 237 232 225 227 133 160 131 198 132 134 145 135 138 130 136 137 141 161 140 139 228 208 164 149 162 147 228 148 246 155 151 163 150 129 236 231 152] 229 "Table for converting ISO-8859-1 characters into codepage 850 glyphs.") 230(setplist 'cp850-decode-table 231 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 232 233;; Multilingual (Latin-9) 234(defvar cp858-decode-table 235 ;; Nth element is the code of a cp858 glyph for the multibyte 236 ;; character created by (make-char 'latin-iso8859-15 (+ N 160)). 237 ;; The element nil means there's no corresponding cp858 glyph. 238 [ 239 255 173 189 156 213 190 221 245 249 184 166 174 170 240 169 238 240 248 241 253 252 239 230 244 250 247 251 167 175 172 171 243 168 241 183 181 182 199 142 143 146 128 212 144 210 211 222 214 215 216 242 209 165 227 224 226 229 153 158 157 235 233 234 154 237 232 225 243 133 160 131 198 132 134 145 135 138 130 136 137 141 161 140 139 244 208 164 149 162 147 228 148 246 155 151 163 150 129 236 231 152] 245 "Table for converting ISO-8859-15 characters into codepage 858 glyphs.") 246(setplist 'cp858-decode-table 247 '(charset latin-iso8859-15 language "Latin-9" offset 160)) 248 249;; Greek 250(defvar cp851-decode-table 251 [ 252 255 nil nil 156 nil nil nil 245 249 nil nil 174 nil 240 nil nil 253 248 241 nil nil 239 nil 134 nil 141 143 144 175 146 171 149 152 254 161 164 165 166 167 168 169 170 172 173 181 182 184 183 189 190 255 198 199 nil 207 208 209 210 211 212 213 nil nil 155 157 158 159 256 252 214 215 216 221 222 224 225 226 227 228 229 230 231 232 233 257 234 235 237 236 238 242 243 244 246 250 160 251 162 163 253 nil] 258 "Table for converting ISO-8859-7 characters into codepage 851 glyphs.") 259(setplist 'cp851-decode-table 260 '(charset greek-iso8859-7 language "Greek" offset 160)) 261 262;; Slavic/Eastern Europe (Latin-2) 263(defvar cp852-decode-table 264 [ 265 255 164 244 157 207 149 151 245 249 230 184 155 141 240 166 189 266 248 165 247 136 239 150 152 243 242 231 173 156 171 241 167 190 267 232 181 182 198 142 145 143 128 172 144 168 211 183 214 215 210 268 209 227 213 224 226 138 153 158 252 222 233 235 154 237 221 225 269 234 160 131 199 132 146 134 135 159 130 169 137 216 161 140 212 270 208 228 229 162 147 139 148 246 253 133 163 251 129 236 238 250] 271 "Table for converting ISO-8859-2 characters into codepage 852 glyphs.") 272(setplist 'cp852-decode-table 273 '(charset latin-iso8859-2 language "Latin-2" offset 160)) 274 275;; Russian 276(defvar cp855-decode-table 277 [ 278 255 133 129 131 135 137 139 141 143 145 147 149 151 240 153 155 279 161 163 236 173 167 169 234 244 184 190 199 209 211 213 215 221 280 226 228 230 232 171 182 165 252 246 250 159 242 238 248 157 224 281 160 162 235 172 166 168 233 243 183 189 198 208 210 212 214 216 282 225 227 229 231 170 181 164 251 245 249 158 241 237 247 156 222 283 239 132 128 130 134 136 138 140 142 144 146 148 150 253 152 154] 284 "Table for converting ISO-8859-5 characters into codepage 855 glyphs.") 285(setplist 'cp855-decode-table 286 '(charset cyrillic-iso8859-5 language "Cyrillic-ISO" offset 160)) 287 288;; Turkish 289(defvar cp857-decode-table 290 [ 291 255 nil nil 156 207 nil 245 249 152 158 166 nil 240 nil 292 248 nil 253 252 239 nil nil nil nil 141 159 167 nil 171 nil 293 183 181 182 142 nil nil 128 212 144 210 211 222 214 215 216 294 165 227 224 226 nil 153 232 nil 235 233 234 154 nil nil 225 295 133 160 131 132 nil nil 135 138 130 136 137 236 161 140 139 296 164 149 162 147 nil 148 246 nil 151 163 150 129 nil nil 250] 297 "Table for converting ISO-8859-3 characters into codepage 857 glyphs.") 298(setplist 'cp857-decode-table 299 '(charset latin-iso8859-3 language "Latin-3" offset 160)) 300 301;; Portuguese 302(defvar cp860-decode-table 303 [ 304 255 173 155 156 nil nil 179 nil nil nil 166 174 170 nil nil nil 305 nil 241 253 nil nil nil nil 249 nil nil 167 175 172 171 nil 168 306 145 134 143 142 nil nil nil 128 146 144 137 nil 152 nil 139 nil 307 nil 165 159 169 140 153 nil nil nil 157 150 nil 154 nil nil nil 308 133 160 131 132 nil nil nil 135 138 130 136 nil 141 161 nil nil 309 nil 164 149 162 147 148 nil 246 nil 151 163 nil 129 nil nil nil] 310 "Table for converting ISO-8859-1 characters into codepage 860 glyphs.") 311(setplist 'cp860-decode-table 312 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 313 314;; Icelandic 315(defvar cp861-decode-table 316 [ 317 255 173 nil 156 nil nil nil nil nil nil nil 174 170 nil nil nil 318 nil 241 253 nil nil nil nil 249 nil nil nil 175 172 171 nil 168 319 nil 164 nil nil 142 143 146 128 nil 144 nil nil nil 165 nil nil 320 139 nil 159 166 nil nil 153 nil 157 nil 167 nil 154 151 141 nil 321 133 160 131 nil 132 134 145 135 138 130 136 137 nil 161 nil nil 322 140 nil nil 162 147 nil 148 246 155 nil 163 150 129 152 149 nil] 323 "Table for converting ISO-8859-1 characters into codepage 861 glyphs.") 324(setplist 'cp861-decode-table 325 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 326 327;; Hebrew 328(defvar cp862-decode-table 329 ;; Nth element is the code of a cp862 glyph for the multibyte 330 ;; character created by (make-char 'hebrew-iso8859-8 (+ N 160)). 331 ;; The element nil means there's no corresponding cp862 glyph. 332 [ 333 255 173 155 156 nil 157 179 nil nil nil nil 174 170 196 nil nil 334 248 241 253 nil nil 230 nil 249 nil nil 246 175 172 171 nil nil 335 nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil 336 nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil 205 337 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 338 144 145 146 147 148 149 150 151 152 153 154 nil nil nil nil nil] 339 "Table for converting ISO-8859-8 characters into codepage 862 glyphs.") 340(setplist 'cp862-decode-table 341 '(charset hebrew-iso8859-8 language "Hebrew" offset 160)) 342 343;; French Canadian 344(defvar cp863-decode-table 345 [ 346 255 nil 155 156 152 nil 160 143 164 nil nil 174 170 nil nil 167 347 nil 241 253 166 161 nil 134 249 165 nil nil 175 172 171 173 nil 348 142 nil 132 nil nil nil nil 128 145 144 146 148 nil nil 168 149 349 nil nil nil nil 153 nil nil nil nil 157 nil 158 154 nil nil nil 350 133 nil 131 nil nil nil nil 135 138 130 136 137 141 nil 140 139 351 nil nil nil 162 147 nil nil 246 nil 151 163 150 129 nil nil nil] 352 "Table for converting ISO-8859-1 characters into codepage 863 glyphs.") 353(setplist 'cp863-decode-table 354 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 355 356;; Arabic 357;; FIXME: Emacs doesn't seem to support the "Arabic" language 358;; environment yet. So this is only partially usable, for now 359(defvar cp864-decode-table 360 [ 361 255 nil nil nil 164 nil nil nil nil nil nil nil 172 161 nil nil 362 nil nil nil nil nil nil nil nil nil nil nil 187 nil nil nil 191 363 nil 193 194 195 196 nil 198 199 169 201 170 171 173 174 175 207 364 208 209 210 188 189 190 235 215 216 223 238 nil nil nil nil nil 365 224 247 248 252 251 239 242 243 232 233 253 nil nil nil nil nil 366 nil 241 nil nil nil nil nil nil nil nil nil nil nil nil nil nil] 367 "Table for converting ISO-8859-6 characters into codepage 864 glyphs.") 368(setplist 'cp864-decode-table 369 '(charset arabic-iso8859-6 language nil offset 160)) 370 371;; Arabic OEM codepage used by Windows 372;; FIXME: Emacs doesn't seem to support the "Arabic" language 373;; environment yet. So this is only partially usable, for now 374(defvar cp720-decode-table 375 [ 376 255 nil nil nil 148 nil nil nil nil nil nil nil nil 196 nil nil 377 nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil 378 nil 152 153 154 155 157 158 159 160 161 162 163 164 165 166 167 379 168 169 170 171 172 173 224 225 226 227 228 nil nil nil nil nil 380 149 229 231 232 233 234 235 236 237 238 239 241 242 243 244 245 381 246 145 146 nil nil nil nil nil nil nil nil nil nil nil nil nil] 382 "Table for converting ISO-8859-6 characters into codepage 720 glyphs.") 383(setplist 'cp720-decode-table 384 '(charset arabic-iso8859-6 language nil offset 160)) 385 386 387;; Nordic (Norwegian/Danish) 388(defvar cp865-decode-table 389 [ 390 255 173 nil 156 nil nil nil nil nil nil 166 174 170 nil nil nil 391 nil 241 253 nil nil nil nil 249 nil nil 167 175 172 171 nil 168 392 nil nil nil nil 142 143 146 128 nil 144 nil nil nil nil nil nil 393 nil 165 nil nil nil nil 153 nil 157 nil nil nil 154 nil nil nil 394 133 160 131 nil 132 134 145 135 138 130 136 137 141 161 140 139 395 nil 164 149 162 147 nil 148 246 155 151 163 150 129 nil nil 152] 396 "Table for converting ISO-8859-1 characters into codepage 865 glyphs.") 397(setplist 'cp865-decode-table 398 '(charset latin-iso8859-1 language "Latin-1" offset 160)) 399 400;; Russian (Yes, another one! This one's supposed to be used 401;; on Windows as the Russian OEM code page.) 402(defvar cp866-decode-table 403 [ 404 255 240 nil nil 242 nil nil 244 nil nil nil nil nil nil 246 nil 405 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 406 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 407 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 408 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 409 252 241 nil nil 243 nil nil 245 nil nil nil nil nil nil 247 nil] 410 "Table for converting ISO-8859-5 characters into codepage 866 glyphs.") 411(setplist 'cp866-decode-table 412 '(charset cyrillic-iso8859-5 language "Cyrillic-ISO" offset 160)) 413 414;; Greek (yes, another one!) 415(defvar cp869-decode-table 416 [ 417 255 139 140 156 nil nil 138 245 249 151 nil 174 137 240 nil 142 418 248 241 153 154 239 247 134 136 141 143 144 175 146 171 149 152 419 161 164 165 166 167 168 169 170 172 173 181 182 183 184 189 190 420 198 199 nil 207 208 209 210 211 212 213 145 150 155 157 158 159 421 252 214 215 216 221 222 224 225 226 227 228 229 230 231 232 233 422 234 235 237 236 238 242 243 244 246 250 160 251 162 163 253 nil] 423 "Table for converting ISO-8859-7 characters into codepage 869 glyphs.") 424(setplist 'cp869-decode-table 425 '(charset greek-iso8859-7 language "Greek" offset 160)) 426 427;; Greek OEM codepage used by Windows 428(defvar cp737-decode-table 429 [ 430 255 nil nil nil nil nil 179 nil nil nil nil nil nil 196 nil nil 431 248 241 253 nil nil nil 234 250 235 236 237 nil 238 nil 239 240 432 nil 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 433 143 144 nil 145 146 147 148 149 150 151 244 245 225 226 227 229 434 nil 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 435 167 168 170 169 171 172 173 174 175 224 228 232 230 231 233 nil] 436 "Table for converting ISO-8859-7 characters into codepage 737 glyphs.") 437(setplist 'cp737-decode-table 438 '(charset greek-iso8859-7 language "Greek" offset 160)) 439 440;; Conversion from codepages 770-775 to Latin-4 for Baltic countries. 441;; FIXME: Once we support Latin-7, these should be remapped into it. 442(defvar cp770-decode-table 443 [ 444 255 143 nil nil 155 nil 156 nil 157 159 137 168 nil 196 146 nil 445 248 133 nil nil nil nil 134 nil nil 158 136 152 nil nil 145 nil 446 160 nil nil nil 142 nil nil 173 128 nil 139 nil 144 nil nil 161 447 nil nil nil 163 nil 149 153 nil nil 167 nil nil 154 nil 166 225 448 131 nil nil nil 132 nil nil 141 135 nil 138 nil 130 nil nil 140 449 nil nil nil 162 nil 147 148 247 nil 151 nil nil 129 nil 150 nil] 450 "Table for converting ISO-8859-4 characters into codepage 770 glyphs.") 451(setplist 'cp770-decode-table 452 '(charset latin-iso8859-4 language "Latin-4" offset 160)) 453 454(defvar cp773-decode-table 455 [ 456 255 220 nil 138 150 nil 234 190 166 246 237 149 173 196 252 nil 457 208 nil nil 139 239 nil 235 nil nil 247 137 133 136 nil 253 nil 458 160 nil nil nil 142 143 146 244 222 144 240 nil 242 nil nil 161 459 nil 238 226 232 nil 229 153 158 157 248 nil nil 154 nil 250 225 460 131 nil nil nil 132 134 145 245 223 130 241 nil 243 nil nil 140 461 nil 236 147 233 nil 228 148 198 155 249 nil nil 129 nil 251 nil] 462 "Table for converting ISO-8859-4 characters into codepage 773 glyphs.") 463(setplist 'cp773-decode-table 464 '(charset latin-iso8859-4 language "Latin-4" offset 160)) 465 466(defvar cp774-decode-table 467 [ 468 255 181 nil nil 155 nil nil nil 245 190 nil nil nil 196 207 nil 469 248 208 nil nil nil nil nil nil nil 213 nil nil nil nil 216 nil 470 nil nil nil nil 142 143 146 189 182 144 183 nil 184 nil nil nil 471 nil nil nil nil nil nil 153 nil nil 198 nil nil 154 nil 199 225 472 nil 160 nil nil 132 134 145 212 209 130 210 137 211 161 140 nil 473 nil nil nil nil 147 nil 148 246 237 214 163 150 129 nil 215 248] 474 "Table for converting ISO-8859-4 characters into codepage 774 glyphs.") 475(setplist 'cp774-decode-table 476 '(charset latin-iso8859-4 language "Latin-4" offset 160)) 477 478(defvar cp775-decode-table 479 [ 480 255 181 nil 138 150 nil 234 245 166 190 237 149 173 240 207 nil 481 248 208 nil 139 239 nil 235 nil nil 213 137 133 136 nil 216 nil 482 160 nil nil nil 142 143 146 189 182 144 183 nil 184 nil nil 161 483 nil 238 226 232 nil 229 153 158 157 198 nil nil 154 nil 199 225 484 131 nil nil nil 132 134 145 212 209 130 210 nil 211 nil nil 140 485 nil 236 147 233 nil 228 148 247 155 214 nil nil 129 nil 215 nil] 486 "Table for converting ISO-8859-4 characters into codepage 775 glyphs.") 487(setplist 'cp775-decode-table 488 '(charset latin-iso8859-4 language "Latin-4" offset 160)) 489 490;; Support for the Windows 12xx series of codepages that MS has 491;; butchered from the ISO-8859 specs. This does not add support for 492;; the extended characters that MS has added in the 128 - 159 coding 493;; range, only translates those characters that can be expressed in 494;; the corresponding iso-8859 charset. 495 496;; Codepage Mapping: 497;; 498;; Windows-1250: ISO-8859-2 (Central Europe) - differs in some positions 499;; Windows-1251: ISO-8859-5 (Cyrillic) - differs wildly 500;; Windows-1252: ISO-8859-1 (West Europe) - exact match 501;; Windows-1253: ISO-8859-7 (Greek) - differs in some positions 502;; Windows-1254: ISO-8859-9 (Turkish) - exact match 503;; Windows-1255: ISO-8859-8 (Hebrew) - exact match 504;; Windows-1256: ISO-8859-6 (Arabic) - half match 505;; Windows-1257: ISO-8859-4 (Baltic) - differs, future Latin-7 506;; Windows-1258: VISCII (Vietnamese) - Completely different 507 508(defvar cp1250-decode-table 509 [ 510 160 165 162 163 164 188 140 167 168 138 170 141 143 173 142 175 511 176 185 178 179 180 190 156 161 184 154 186 157 159 189 158 191 512 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 513 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 514 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 515 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 ] 516 "ISO-8859-2 to Windows-1250 (Central Europe) codepage decoding table.") 517(setplist 'cp1250-decode-table 518 '(charset latin-iso8859-2 language "Latin-2" offset 160)) 519 520(defvar cp1251-decode-table 521 [ 522 160 168 128 129 170 189 178 175 163 138 140 142 141 173 161 143 523 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 524 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 525 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 526 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 527 185 184 144 131 186 190 179 191 188 154 156 158 157 167 162 159 ] 528 "ISO-8859-5 to Windows-1251 (Cyrillic) codepage decoding table.") 529(setplist 'cp1251-decode-table 530 '(charset cyrillic-iso8859-5 language "Cyrillic-ISO" offset 160)) 531 532;; cp1253 is missing nbsp so we cannot quite translate perfectly. It 533;; also has two micro/mu characters which would require more complex 534;; processing to accomodate. 535(defvar cp1253-decode-table 536 [ 537 nil 145 146 163 nil nil 166 167 168 169 nil 171 172 173 nil 151 538 176 177 178 179 180 161 162 183 184 185 186 187 188 189 190 191 539 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 540 208 209 nil 211 212 213 214 215 216 217 218 219 220 221 222 223 541 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 542 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 nil ] 543 "ISO-8859-7 to Windows-1253 (Greek) codepage decoding table.") 544(setplist 'cp1253-decode-table 545 '(charset greek-iso8859-7 language "Greek" offset 160)) 546 547;; Since Latin-7 is not yet official, and Emacs does not support it, 548;; provide translation between Windows-1257 and Latin-4 the best we 549;; can. 550(defvar cp1257-decode-table 551 [ 552 160 192 nil 170 164 nil 207 167 nil 208 199 204 nil 173 222 nil 553 176 224 nil 186 nil nil 239 nil nil 240 231 236 nil nil 254 nil 554 194 nil nil nil 196 197 175 193 200 201 198 nil 203 nil nil 206 555 nil 210 212 205 nil 213 214 215 168 216 nil nil 220 nil 219 223 556 226 nil nil nil 228 229 191 225 232 233 230 nil 235 nil nil 238 557 nil 242 244 237 nil 245 246 247 184 248 nil nil 252 nil 251 nil ] 558 "ISO-8859-4 to Windows-1257 (Baltic) codepage decoding table.") 559(setplist 'cp1257-decode-table 560 '(charset latin-iso8859-4 language "Latin-4" offset 160)) 561 562;;;###autoload 563(defun cp-make-coding-systems-for-codepage (codepage iso-name offset) 564 "Create a coding system to convert IBM CODEPAGE into charset ISO-NAME 565whose first character is at offset OFFSET from the beginning of 8-bit 566ASCII table. 567 568The created coding system has the usual 3 subsidiary systems: for Unix-, 569DOS- and Mac-style EOL conversion. However, unlike built-in coding 570systems, the Mac-style EOL conversion is currently not supported by the 571decoder and encoder created by this function." 572 (let* ((decode-table (intern (format "%s-decode-table" codepage))) 573 (nonascii-table 574 (intern (format "%s-nonascii-translation-table" codepage))) 575 (decode-translation 576 (intern (format "%s-decode-translation-table" codepage))) 577 (encode-translation 578 (intern (format "%s-encode-translation-table" codepage)))) 579 (set nonascii-table 580 (make-translation-table-from-vector 581 (cp-decoding-vector-for-codepage 582 (symbol-value decode-table) iso-name offset))) 583 (define-translation-table encode-translation 584 (char-table-extra-slot (symbol-value nonascii-table) 0)) 585 ;; For charsets other than ascii, eight-bit-* and ISO-NAME, set 586 ;; `?' for one-column charsets, and some Japanese character for 587 ;; wide-column charsets. CCL encoder convert that Japanese 588 ;; character to either dos-unsupported-char-glyph or "??". 589 (let ((tbl (char-table-extra-slot (symbol-value nonascii-table) 0)) 590 (undef (if (eq system-type 'ms-dos) 591 (if dos-unsupported-char-glyph 592 (logand dos-unsupported-char-glyph 255) 593 127) 594 ??)) 595 (charsets (delq 'ascii 596 (delq 'eight-bit-control 597 (delq 'eight-bit-graphic 598 (delq iso-name 599 (copy-sequence charset-list)))))) 600 (wide-column-char (make-char 'japanese-jisx0208 32 32))) 601 (while charsets 602 (aset tbl (make-char (car charsets)) 603 (if (= (charset-width (car charsets)) 1) undef wide-column-char)) 604 (setq charsets (cdr charsets)))) 605 (define-translation-table decode-translation 606 (symbol-value nonascii-table)) 607 (cp-coding-system-for-codepage-1 608 (intern codepage) ?D iso-name decode-translation encode-translation) 609 )) 610 611(defun cp-codepage-decoder (codepage) 612 "If CODEPAGE is the name of a supported codepage, return its decode table. 613Otherwise return nil." 614 (let ((cp (if (symbolp codepage) (symbol-name codepage) codepage))) 615 (cond 616 ((stringp cp) 617 (intern-soft (format "%s-decode-table" cp))) 618 (t nil)))) 619 620;;;###autoload 621(defun cp-charset-for-codepage (codepage) 622 "Return the charset for which there is a translation table to DOS CODEPAGE. 623CODEPAGE must be the name of a DOS codepage, a string." 624 (let ((cp-decoder (cp-codepage-decoder codepage))) 625 (if (null cp-decoder) 626 (error "Unsupported codepage %s" codepage) 627 (get cp-decoder 'charset)))) 628 629;;;###autoload 630(defun cp-language-for-codepage (codepage) 631 "Return the name of the MULE language environment for CODEPAGE. 632CODEPAGE must be the name of a DOS codepage, a string." 633 (let ((cp-decoder (cp-codepage-decoder codepage))) 634 (if (null cp-decoder) 635 (error "Unsupported codepage %s" codepage) 636 (get cp-decoder 'language)))) 637 638;;;###autoload 639(defun cp-offset-for-codepage (codepage) 640 "Return the offset to be used in setting up coding systems for CODEPAGE. 641CODEPAGE must be the name of a DOS codepage, a string." 642 (let ((cp-decoder (cp-codepage-decoder codepage))) 643 (if (null cp-decoder) 644 (error "Unsupported codepage %s" codepage) 645 (get cp-decoder 'offset)))) 646 647;;;###autoload 648(defun cp-supported-codepages () 649 "Return an alist of supported codepages. 650 651Each association in the alist has the form (NNN . CHARSET), where NNN is the 652codepage number, and CHARSET is the MULE charset which is the closest match 653for the character set supported by that codepage. 654 655A codepage NNN is supported if a variable called `cpNNN-decode-table' exists, 656is a vector, and has a charset property." 657 (save-match-data 658 (let (alist chset sname) 659 (mapatoms 660 (function 661 (lambda (sym) 662 (if (and (boundp sym) 663 (string-match "\\`cp\\([1-9][0-9][0-9][0-9]?\\)-decode-table\\'" 664 (setq sname (symbol-name sym))) 665 (vectorp (symbol-value sym)) 666 (setq chset (get sym 'charset))) 667 (setq alist 668 (cons (cons (match-string 1 sname) chset) alist)))))) 669 alist))) 670 671;;;###autoload 672(defun codepage-setup (codepage) 673 "Create a coding system cpCODEPAGE to support the IBM codepage CODEPAGE. 674 675These coding systems are meant for encoding and decoding 8-bit non-ASCII 676characters used by the IBM codepages, typically in conjunction with files 677read/written by MS-DOS software, or for display on the MS-DOS terminal." 678 (interactive 679 (let ((completion-ignore-case t) 680 (candidates (cp-supported-codepages))) 681 (list (completing-read "Setup DOS Codepage (default 437): " candidates 682 nil t nil nil "437")))) 683 (let* ((cp (format "cp%s" codepage)) 684 (cp-defined (intern-soft cp))) 685 (or (and cp-defined ;; avoid defining if already defined 686 (coding-system-p cp-defined)) 687 (cp-make-coding-systems-for-codepage 688 cp (cp-charset-for-codepage cp) (cp-offset-for-codepage cp))))) 689 690;; Add DOS codepages to `non-iso-charset-alist'. 691(eval-after-load "mule-diag" 692 '(let ((tail (cp-supported-codepages)) 693 elt) 694 (while tail 695 (setq elt (car tail) tail (cdr tail)) 696 ;; Now ELT is (CODEPAGE . CHARSET), where CODEPAGE is a string 697 ;; (e.g. "850"), CHARSET is a charset that characters in CODEPAGE 698 ;; are mapped to. 699 (unless (assq (intern (concat "cp" (car elt))) non-iso-charset-alist) 700 (setq non-iso-charset-alist 701 (cons (list (intern (concat "cp" (car elt))) 702 (list 'ascii (cdr elt)) 703 `(lambda (code) 704 (decode-codepage-char ,(string-to-int (car elt)) 705 code)) 706 (list (list 0 255))) 707 non-iso-charset-alist)))))) 708 709(provide 'codepage) 710 711;;; arch-tag: 80328de8-b94e-4386-be26-5876105731f0 712;;; codepage.el ends here 713