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| 1 : | pazsan | 1.1 | \ UTF-8 handling 12dec04py |
| 2 : | |||
| 3 : | anton | 1.44 | \ Copyright (C) 2004,2005,2006,2007,2008,2009,2010,2011 Free Software Foundation, Inc. |
| 4 : | pazsan | 1.1 | |
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | anton | 1.34 | \ as published by the Free Software Foundation, either version 3 |
| 10 : | pazsan | 1.1 | \ of the License, or (at your option) any later version. |
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | anton | 1.34 | \ along with this program. If not, see http://www.gnu.org/licenses/. |
| 19 : | pazsan | 1.1 | |
| 20 : | \ short: u8 means utf-8 encoded address | ||
| 21 : | |||
| 22 : | pazsan | 1.7 | s" malformed UTF-8 character" exception Constant UTF-8-err |
| 23 : | |||
| 24 : | anton | 1.13 | $80 Value max-single-byte |
| 25 : | pazsan | 1.10 | |
| 26 : | pazsan | 1.4 | : u8len ( u8 -- n ) |
| 27 : | anton | 1.13 | dup max-single-byte u< IF drop 1 EXIT THEN \ special case ASCII |
| 28 : | pazsan | 1.1 | $800 2 >r |
| 29 : | pazsan | 1.17 | BEGIN 2dup u>= WHILE 5 lshift r> 1+ >r dup 0= UNTIL THEN |
| 30 : | pazsan | 1.1 | 2drop r> ; |
| 31 : | |||
| 32 : | : u8@+ ( u8addr -- u8addr' u ) | ||
| 33 : | anton | 1.13 | count dup max-single-byte u< ?EXIT \ special case ASCII |
| 34 : | pazsan | 1.17 | dup $C2 u< IF UTF-8-err throw THEN \ malformed character |
| 35 : | pazsan | 1.1 | $7F and $40 >r |
| 36 : | BEGIN dup r@ and WHILE r@ xor | ||
| 37 : | 6 lshift r> 5 lshift >r >r count | ||
| 38 : | pazsan | 1.7 | dup $C0 and $80 <> IF UTF-8-err throw THEN |
| 39 : | pazsan | 1.1 | $3F and r> or |
| 40 : | REPEAT rdrop ; | ||
| 41 : | |||
| 42 : | : u8!+ ( u u8addr -- u8addr' ) | ||
| 43 : | anton | 1.13 | over max-single-byte u< IF tuck c! 1+ EXIT THEN \ special case ASCII |
| 44 : | pazsan | 1.1 | >r 0 swap $3F |
| 45 : | BEGIN 2dup u> WHILE | ||
| 46 : | 2/ >r dup $3F and $80 or swap 6 rshift r> | ||
| 47 : | REPEAT $7F xor 2* or r> | ||
| 48 : | BEGIN over $80 u>= WHILE tuck c! 1+ REPEAT nip ; | ||
| 49 : | |||
| 50 : | pazsan | 1.8 | \ plug-in so that char and '<char> work for UTF-8 |
| 51 : | |||
| 52 : | anton | 1.9 | [ifundef] char@ \ !! bootstrapping help |
| 53 : | Defer char@ ( addr u -- char addr' u' ) | ||
| 54 : | :noname over c@ -rot 1 /string ; IS char@ | ||
| 55 : | [then] | ||
| 56 : | |||
| 57 : | pazsan | 1.8 | :noname ( addr u -- char addr' u' ) |
| 58 : | anton | 1.9 | \ !! the if here seems to work around some breakage, but not |
| 59 : | pazsan | 1.24 | \ entirely; e.g., try 'รง' with LANG=C. |
| 60 : | anton | 1.9 | dup 1 u<= IF defers char@ EXIT THEN |
| 61 : | pazsan | 1.8 | over + >r u8@+ swap r> over - ; IS char@ |
| 62 : | |||
| 63 : | pazsan | 1.1 | \ scan to next/previous character |
| 64 : | |||
| 65 : | anton | 1.13 | \ alternative names: u8char+ u8char- |
| 66 : | |||
| 67 : | pazsan | 1.12 | : u8>> ( u8addr -- u8addr' ) u8@+ drop ; |
| 68 : | pazsan | 1.1 | : u8<< ( u8addr -- u8addr' ) |
| 69 : | anton | 1.13 | BEGIN 1- dup c@ $C0 and max-single-byte <> UNTIL ; |
| 70 : | pazsan | 1.1 | |
| 71 : | \ utf key and emit | ||
| 72 : | |||
| 73 : | pazsan | 1.27 | Defer check-xy ' noop IS check-xy |
| 74 : | |||
| 75 : | pazsan | 1.1 | : u8key ( -- u ) |
| 76 : | pazsan | 1.37 | key dup max-single-byte u< ?EXIT \ special case ASCII |
| 77 : | pazsan | 1.27 | dup $FF = ?EXIT \ special resize character |
| 78 : | pazsan | 1.17 | dup $C2 u< IF UTF-8-err throw THEN \ malformed character |
| 79 : | pazsan | 1.1 | $7F and $40 >r |
| 80 : | BEGIN dup r@ and WHILE r@ xor | ||
| 81 : | pazsan | 1.37 | 6 lshift r> 5 lshift >r >r key |
| 82 : | pazsan | 1.7 | dup $C0 and $80 <> IF UTF-8-err throw THEN |
| 83 : | pazsan | 1.1 | $3F and r> or |
| 84 : | REPEAT rdrop ; | ||
| 85 : | |||
| 86 : | : u8emit ( u -- ) | ||
| 87 : | pazsan | 1.37 | dup max-single-byte u< IF emit EXIT THEN \ special case ASCII |
| 88 : | pazsan | 1.1 | 0 swap $3F |
| 89 : | BEGIN 2dup u> WHILE | ||
| 90 : | 2/ >r dup $3F and $80 or swap 6 rshift r> | ||
| 91 : | REPEAT $7F xor 2* or | ||
| 92 : | pazsan | 1.37 | BEGIN dup $80 u>= WHILE emit REPEAT drop ; |
| 93 : | anton | 1.13 | |
| 94 : | \ utf-8 stuff for xchars | ||
| 95 : | |||
| 96 : | pazsan | 1.29 | : +u8/string ( xc-addr1 u1 -- xc-addr2 u2 ) |
| 97 : | over dup u8>> swap - /string ; | ||
| 98 : | : u8\string- ( xcaddr u -- xcaddr u' ) | ||
| 99 : | pazsan | 1.26 | over + u8<< over - ; |
| 100 : | |||
| 101 : | anton | 1.13 | : u8@ ( c-addr -- u ) |
| 102 : | u8@+ nip ; | ||
| 103 : | |||
| 104 : | : u8!+? ( xc xc-addr1 u1 -- xc-addr2 u2 f ) | ||
| 105 : | >r over u8len r@ over u< if ( xc xc-addr1 len r: u1 ) | ||
| 106 : | \ not enough space | ||
| 107 : | drop nip r> false | ||
| 108 : | else | ||
| 109 : | >r u8!+ r> r> swap - true | ||
| 110 : | then ; | ||
| 111 : | |||
| 112 : | pazsan | 1.28 | : u8addrlen ( u8-addr u -- u ) drop |
| 113 : | anton | 1.13 | \ length of UTF-8 char starting at u8-addr (accesses only u8-addr) |
| 114 : | c@ | ||
| 115 : | dup $80 u< if drop 1 exit endif | ||
| 116 : | dup $c0 u< if UTF-8-err throw endif | ||
| 117 : | dup $e0 u< if drop 2 exit endif | ||
| 118 : | dup $f0 u< if drop 3 exit endif | ||
| 119 : | dup $f8 u< if drop 4 exit endif | ||
| 120 : | dup $fc u< if drop 5 exit endif | ||
| 121 : | dup $fe u< if drop 6 exit endif | ||
| 122 : | pazsan | 1.38 | dup $ff u< if drop 7 exit endif |
| 123 : | drop 8 ; | ||
| 124 : | anton | 1.13 | |
| 125 : | : -u8trailing-garbage ( addr u1 -- addr u2 ) | ||
| 126 : | 2dup + dup u8<< ( addr u1 end1 end2 ) | ||
| 127 : | pazsan | 1.28 | 2dup dup over over - u8addrlen + = if \ last character ok |
| 128 : | anton | 1.13 | 2drop |
| 129 : | else | ||
| 130 : | nip nip over - | ||
| 131 : | then ; | ||
| 132 : | |||
| 133 : | anton | 1.22 | [IFUNDEF] wcwidth |
| 134 : | pazsan | 1.24 | : wc,3 ( n low high -- ) 1+ , , , ; |
| 135 : | |||
| 136 : | Create wc-table \ derived from wcwidth source code, for UCS32 | ||
| 137 : | anton | 1.35 | 0 $0300 $0357 wc,3 |
| 138 : | 0 $035D $036F wc,3 | ||
| 139 : | 0 $0483 $0486 wc,3 | ||
| 140 : | 0 $0488 $0489 wc,3 | ||
| 141 : | 0 $0591 $05A1 wc,3 | ||
| 142 : | 0 $05A3 $05B9 wc,3 | ||
| 143 : | 0 $05BB $05BD wc,3 | ||
| 144 : | 0 $05BF $05BF wc,3 | ||
| 145 : | 0 $05C1 $05C2 wc,3 | ||
| 146 : | 0 $05C4 $05C4 wc,3 | ||
| 147 : | 0 $0600 $0603 wc,3 | ||
| 148 : | 0 $0610 $0615 wc,3 | ||
| 149 : | 0 $064B $0658 wc,3 | ||
| 150 : | 0 $0670 $0670 wc,3 | ||
| 151 : | 0 $06D6 $06E4 wc,3 | ||
| 152 : | 0 $06E7 $06E8 wc,3 | ||
| 153 : | 0 $06EA $06ED wc,3 | ||
| 154 : | 0 $070F $070F wc,3 | ||
| 155 : | 0 $0711 $0711 wc,3 | ||
| 156 : | 0 $0730 $074A wc,3 | ||
| 157 : | 0 $07A6 $07B0 wc,3 | ||
| 158 : | 0 $0901 $0902 wc,3 | ||
| 159 : | 0 $093C $093C wc,3 | ||
| 160 : | 0 $0941 $0948 wc,3 | ||
| 161 : | 0 $094D $094D wc,3 | ||
| 162 : | 0 $0951 $0954 wc,3 | ||
| 163 : | 0 $0962 $0963 wc,3 | ||
| 164 : | 0 $0981 $0981 wc,3 | ||
| 165 : | 0 $09BC $09BC wc,3 | ||
| 166 : | 0 $09C1 $09C4 wc,3 | ||
| 167 : | 0 $09CD $09CD wc,3 | ||
| 168 : | 0 $09E2 $09E3 wc,3 | ||
| 169 : | 0 $0A01 $0A02 wc,3 | ||
| 170 : | 0 $0A3C $0A3C wc,3 | ||
| 171 : | 0 $0A41 $0A42 wc,3 | ||
| 172 : | 0 $0A47 $0A48 wc,3 | ||
| 173 : | 0 $0A4B $0A4D wc,3 | ||
| 174 : | 0 $0A70 $0A71 wc,3 | ||
| 175 : | 0 $0A81 $0A82 wc,3 | ||
| 176 : | 0 $0ABC $0ABC wc,3 | ||
| 177 : | 0 $0AC1 $0AC5 wc,3 | ||
| 178 : | 0 $0AC7 $0AC8 wc,3 | ||
| 179 : | 0 $0ACD $0ACD wc,3 | ||
| 180 : | 0 $0AE2 $0AE3 wc,3 | ||
| 181 : | 0 $0B01 $0B01 wc,3 | ||
| 182 : | 0 $0B3C $0B3C wc,3 | ||
| 183 : | 0 $0B3F $0B3F wc,3 | ||
| 184 : | 0 $0B41 $0B43 wc,3 | ||
| 185 : | 0 $0B4D $0B4D wc,3 | ||
| 186 : | 0 $0B56 $0B56 wc,3 | ||
| 187 : | 0 $0B82 $0B82 wc,3 | ||
| 188 : | 0 $0BC0 $0BC0 wc,3 | ||
| 189 : | 0 $0BCD $0BCD wc,3 | ||
| 190 : | 0 $0C3E $0C40 wc,3 | ||
| 191 : | 0 $0C46 $0C48 wc,3 | ||
| 192 : | 0 $0C4A $0C4D wc,3 | ||
| 193 : | 0 $0C55 $0C56 wc,3 | ||
| 194 : | 0 $0CBC $0CBC wc,3 | ||
| 195 : | 0 $0CBF $0CBF wc,3 | ||
| 196 : | 0 $0CC6 $0CC6 wc,3 | ||
| 197 : | 0 $0CCC $0CCD wc,3 | ||
| 198 : | 0 $0D41 $0D43 wc,3 | ||
| 199 : | 0 $0D4D $0D4D wc,3 | ||
| 200 : | 0 $0DCA $0DCA wc,3 | ||
| 201 : | 0 $0DD2 $0DD4 wc,3 | ||
| 202 : | 0 $0DD6 $0DD6 wc,3 | ||
| 203 : | 0 $0E31 $0E31 wc,3 | ||
| 204 : | 0 $0E34 $0E3A wc,3 | ||
| 205 : | 0 $0E47 $0E4E wc,3 | ||
| 206 : | 0 $0EB1 $0EB1 wc,3 | ||
| 207 : | 0 $0EB4 $0EB9 wc,3 | ||
| 208 : | 0 $0EBB $0EBC wc,3 | ||
| 209 : | 0 $0EC8 $0ECD wc,3 | ||
| 210 : | 0 $0F18 $0F19 wc,3 | ||
| 211 : | 0 $0F35 $0F35 wc,3 | ||
| 212 : | 0 $0F37 $0F37 wc,3 | ||
| 213 : | 0 $0F39 $0F39 wc,3 | ||
| 214 : | 0 $0F71 $0F7E wc,3 | ||
| 215 : | 0 $0F80 $0F84 wc,3 | ||
| 216 : | 0 $0F86 $0F87 wc,3 | ||
| 217 : | 0 $0F90 $0F97 wc,3 | ||
| 218 : | 0 $0F99 $0FBC wc,3 | ||
| 219 : | 0 $0FC6 $0FC6 wc,3 | ||
| 220 : | 0 $102D $1030 wc,3 | ||
| 221 : | 0 $1032 $1032 wc,3 | ||
| 222 : | 0 $1036 $1037 wc,3 | ||
| 223 : | 0 $1039 $1039 wc,3 | ||
| 224 : | 0 $1058 $1059 wc,3 | ||
| 225 : | 1 $0000 $1100 wc,3 | ||
| 226 : | 2 $1100 $115f wc,3 | ||
| 227 : | 0 $1160 $11FF wc,3 | ||
| 228 : | 0 $1712 $1714 wc,3 | ||
| 229 : | 0 $1732 $1734 wc,3 | ||
| 230 : | 0 $1752 $1753 wc,3 | ||
| 231 : | 0 $1772 $1773 wc,3 | ||
| 232 : | 0 $17B4 $17B5 wc,3 | ||
| 233 : | 0 $17B7 $17BD wc,3 | ||
| 234 : | 0 $17C6 $17C6 wc,3 | ||
| 235 : | 0 $17C9 $17D3 wc,3 | ||
| 236 : | 0 $17DD $17DD wc,3 | ||
| 237 : | 0 $180B $180D wc,3 | ||
| 238 : | 0 $18A9 $18A9 wc,3 | ||
| 239 : | 0 $1920 $1922 wc,3 | ||
| 240 : | 0 $1927 $1928 wc,3 | ||
| 241 : | 0 $1932 $1932 wc,3 | ||
| 242 : | 0 $1939 $193B wc,3 | ||
| 243 : | 0 $200B $200F wc,3 | ||
| 244 : | 0 $202A $202E wc,3 | ||
| 245 : | 0 $2060 $2063 wc,3 | ||
| 246 : | 0 $206A $206F wc,3 | ||
| 247 : | 0 $20D0 $20EA wc,3 | ||
| 248 : | 2 $2329 $232A wc,3 | ||
| 249 : | 0 $302A $302F wc,3 | ||
| 250 : | 2 $2E80 $303E wc,3 | ||
| 251 : | 0 $3099 $309A wc,3 | ||
| 252 : | 2 $3040 $A4CF wc,3 | ||
| 253 : | 2 $AC00 $D7A3 wc,3 | ||
| 254 : | 2 $F900 $FAFF wc,3 | ||
| 255 : | 0 $FB1E $FB1E wc,3 | ||
| 256 : | 0 $FE00 $FE0F wc,3 | ||
| 257 : | 0 $FE20 $FE23 wc,3 | ||
| 258 : | 2 $FE30 $FE6F wc,3 | ||
| 259 : | 0 $FEFF $FEFF wc,3 | ||
| 260 : | 2 $FF00 $FF60 wc,3 | ||
| 261 : | 2 $FFE0 $FFE6 wc,3 | ||
| 262 : | 0 $FFF9 $FFFB wc,3 | ||
| 263 : | 0 $1D167 $1D169 wc,3 | ||
| 264 : | 0 $1D173 $1D182 wc,3 | ||
| 265 : | 0 $1D185 $1D18B wc,3 | ||
| 266 : | 0 $1D1AA $1D1AD wc,3 | ||
| 267 : | 2 $20000 $2FFFD wc,3 | ||
| 268 : | 2 $30000 $3FFFD wc,3 | ||
| 269 : | 0 $E0001 $E0001 wc,3 | ||
| 270 : | 0 $E0020 $E007F wc,3 | ||
| 271 : | 0 $E0100 $E01EF wc,3 | ||
| 272 : | pazsan | 1.24 | here wc-table - Constant #wc-table |
| 273 : | |||
| 274 : | \ inefficient table walk: | ||
| 275 : | |||
| 276 : | pazsan | 1.41 | : xc-width ( xc -- n ) |
| 277 : | pazsan | 1.24 | wc-table #wc-table over + swap ?DO |
| 278 : | dup I 2@ within IF I 2 cells + @ UNLOOP EXIT THEN | ||
| 279 : | 3 cells +LOOP 1 ; | ||
| 280 : | pazsan | 1.41 | [ELSE] |
| 281 : | ' wcwidth Alias xc-width | ||
| 282 : | anton | 1.22 | [THEN] |
| 283 : | |||
| 284 : | pazsan | 1.19 | : u8width ( xcaddr u -- n ) |
| 285 : | 0 rot rot over + swap ?DO | ||
| 286 : | pazsan | 1.41 | I xc@+ swap >r xc-width + |
| 287 : | pazsan | 1.19 | r> I - +LOOP ; |
| 288 : | |||
| 289 : | anton | 1.13 | : set-encoding-utf-8 ( -- ) |
| 290 : | ['] u8emit is xemit | ||
| 291 : | ['] u8key is xkey | ||
| 292 : | ['] u8>> is xchar+ | ||
| 293 : | ['] u8<< is xchar- | ||
| 294 : | pazsan | 1.26 | [ [IFDEF] xstring+ ] |
| 295 : | pazsan | 1.29 | ['] u8\string- is xstring- |
| 296 : | ['] +u8/string is +xstring | ||
| 297 : | [ [THEN] ] | ||
| 298 : | pazsan | 1.32 | [ [IFDEF] +x/string ] |
| 299 : | pazsan | 1.29 | ['] u8\string- is x\string- |
| 300 : | ['] +u8/string is +x/string | ||
| 301 : | pazsan | 1.26 | [ [THEN] ] |
| 302 : | anton | 1.13 | ['] u8@ is xc@ |
| 303 : | pazsan | 1.43 | [ [IFDEF] xc!+ ] |
| 304 : | ['] u8!+ is xc!+ | ||
| 305 : | [ [THEN] ] | ||
| 306 : | anton | 1.13 | ['] u8!+? is xc!+? |
| 307 : | ['] u8@+ is xc@+ | ||
| 308 : | ['] u8len is xc-size | ||
| 309 : | pazsan | 1.20 | [ [IFDEF] x-width ] |
| 310 : | pazsan | 1.19 | ['] u8width is x-width |
| 311 : | pazsan | 1.20 | [ [THEN] ] |
| 312 : | pazsan | 1.28 | [ [IFDEF] x-size ] |
| 313 : | ['] u8addrlen is x-size | ||
| 314 : | [ [THEN] ] | ||
| 315 : | anton | 1.13 | ['] -u8trailing-garbage is -trailing-garbage |
| 316 : | ; | ||
| 317 : | pazsan | 1.1 | |
| 318 : | anton | 1.15 | : utf-8-cold ( -- ) |
| 319 : | pazsan | 1.16 | s" LC_ALL" getenv 2dup d0= IF 2drop |
| 320 : | s" LC_CTYPE" getenv 2dup d0= IF 2drop | ||
| 321 : | s" LANG" getenv 2dup d0= IF 2drop | ||
| 322 : | s" C" THEN THEN THEN | ||
| 323 : | s" UTF-8" search nip nip | ||
| 324 : | anton | 1.15 | IF set-encoding-utf-8 ELSE set-encoding-fixed-width THEN ; |
| 325 : | |||
| 326 : | pazsan | 1.30 | environment-wordlist set-current |
| 327 : | pazsan | 1.31 | : xchar-encoding ( -- addr u ) \ xchar-ext |
| 328 : | \G Returns a printable ASCII string that reperesents the encoding, | ||
| 329 : | \G and use the preferred MIME name (if any) or the name in | ||
| 330 : | \G @url{http://www.iana.org/assignments/character-sets} like | ||
| 331 : | \G ``ISO-LATIN-1'' or ``UTF-8'', with the exception of ``ASCII'', where | ||
| 332 : | \G we prefer the alias ``ASCII''. | ||
| 333 : | max-single-byte $80 = IF s" UTF-8" ELSE s" ISO-LATIN-1" THEN ; | ||
| 334 : | pazsan | 1.39 | : max-xchar ( -- xchar ) |
| 335 : | max-single-byte $80 = IF $7FFFFFFF ELSE $FF THEN ; | ||
| 336 : | ' noop Alias X:xchar | ||
| 337 : | pazsan | 1.30 | forth definitions |
| 338 : | |||
| 339 : | anton | 1.23 | :noname ( -- ) |
| 340 : | defers 'cold | ||
| 341 : | utf-8-cold | ||
| 342 : | ; is 'cold | ||
| 343 : | anton | 1.15 | |
| 344 : | utf-8-cold |
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