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| 1 : | pazsan | 1.1 | \ compiler definitions 14sep97jaw |
| 2 : | |||
| 3 : | anton | 1.6 | \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
| 4 : | |||
| 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 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ 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 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | pazsan | 1.1 | \ \ Revisions-Log |
| 22 : | |||
| 23 : | \ put in seperate file 14sep97jaw | ||
| 24 : | |||
| 25 : | \ \ here allot , c, A, 17dec92py | ||
| 26 : | |||
| 27 : | : allot ( n -- ) \ core | ||
| 28 : | dup unused u> -8 and throw | ||
| 29 : | dp +! ; | ||
| 30 : | |||
| 31 : | : c, ( c -- ) \ core | ||
| 32 : | here 1 chars allot c! ; | ||
| 33 : | |||
| 34 : | : , ( x -- ) \ core | ||
| 35 : | here cell allot ! ; | ||
| 36 : | |||
| 37 : | : 2, ( w1 w2 -- ) \ gforth | ||
| 38 : | here 2 cells allot 2! ; | ||
| 39 : | |||
| 40 : | \ : aligned ( addr -- addr' ) \ core | ||
| 41 : | \ [ cell 1- ] Literal + [ -1 cells ] Literal and ; | ||
| 42 : | |||
| 43 : | : align ( -- ) \ core | ||
| 44 : | here dup aligned swap ?DO bl c, LOOP ; | ||
| 45 : | |||
| 46 : | \ : faligned ( addr -- f-addr ) \ float | ||
| 47 : | \ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; | ||
| 48 : | |||
| 49 : | : falign ( -- ) \ float | ||
| 50 : | here dup faligned swap | ||
| 51 : | ?DO | ||
| 52 : | bl c, | ||
| 53 : | LOOP ; | ||
| 54 : | |||
| 55 : | : maxalign ( -- ) \ float | ||
| 56 : | here dup maxaligned swap | ||
| 57 : | ?DO | ||
| 58 : | bl c, | ||
| 59 : | LOOP ; | ||
| 60 : | |||
| 61 : | \ the code field is aligned if its body is maxaligned | ||
| 62 : | ' maxalign Alias cfalign ( -- ) \ gforth | ||
| 63 : | |||
| 64 : | ' , alias A, ( addr -- ) \ gforth | ||
| 65 : | |||
| 66 : | ' NOOP ALIAS const | ||
| 67 : | |||
| 68 : | \ \ Header 23feb93py | ||
| 69 : | |||
| 70 : | \ input-stream, nextname and noname are quite ugly (passing | ||
| 71 : | \ information through global variables), but they are useful for dealing | ||
| 72 : | \ with existing/independent defining words | ||
| 73 : | |||
| 74 : | defer (header) | ||
| 75 : | defer header ( -- ) \ gforth | ||
| 76 : | ' (header) IS header | ||
| 77 : | |||
| 78 : | : string, ( c-addr u -- ) \ gforth | ||
| 79 : | \G puts down string as cstring | ||
| 80 : | dup c, here swap chars dup allot move ; | ||
| 81 : | |||
| 82 : | : header, ( c-addr u -- ) \ gforth | ||
| 83 : | name-too-long? | ||
| 84 : | align here last ! | ||
| 85 : | current @ 1 or A, \ link field; before revealing, it contains the | ||
| 86 : | \ tagged reveal-into wordlist | ||
| 87 : | string, cfalign | ||
| 88 : | alias-mask lastflags cset ; | ||
| 89 : | |||
| 90 : | : input-stream-header ( "name" -- ) | ||
| 91 : | name name-too-short? header, ; | ||
| 92 : | |||
| 93 : | : input-stream ( -- ) \ general | ||
| 94 : | \G switches back to getting the name from the input stream ; | ||
| 95 : | ['] input-stream-header IS (header) ; | ||
| 96 : | |||
| 97 : | ' input-stream-header IS (header) | ||
| 98 : | |||
| 99 : | \ !! make that a 2variable | ||
| 100 : | create nextname-buffer 32 chars allot | ||
| 101 : | |||
| 102 : | : nextname-header ( -- ) | ||
| 103 : | nextname-buffer count header, | ||
| 104 : | input-stream ; | ||
| 105 : | |||
| 106 : | \ the next name is given in the string | ||
| 107 : | |||
| 108 : | : nextname ( c-addr u -- ) \ gforth | ||
| 109 : | name-too-long? | ||
| 110 : | nextname-buffer c! ( c-addr ) | ||
| 111 : | nextname-buffer count move | ||
| 112 : | ['] nextname-header IS (header) ; | ||
| 113 : | |||
| 114 : | : noname-header ( -- ) | ||
| 115 : | 0 last ! cfalign | ||
| 116 : | input-stream ; | ||
| 117 : | |||
| 118 : | : noname ( -- ) \ gforth | ||
| 119 : | \ the next defined word remains anonymous. The xt of that word is given by lastxt | ||
| 120 : | ['] noname-header IS (header) ; | ||
| 121 : | |||
| 122 : | : lastxt ( -- xt ) \ gforth | ||
| 123 : | \ xt is the execution token of the last word defined. The main purpose of this word is to get the xt of words defined using noname | ||
| 124 : | lastcfa @ ; | ||
| 125 : | |||
| 126 : | \ \ literals 17dec92py | ||
| 127 : | |||
| 128 : | : Literal ( compilation n -- ; run-time -- n ) \ core | ||
| 129 : | postpone lit , ; immediate restrict | ||
| 130 : | |||
| 131 : | : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth | ||
| 132 : | postpone lit A, ; immediate restrict | ||
| 133 : | |||
| 134 : | : char ( 'char' -- n ) \ core | ||
| 135 : | bl word char+ c@ ; | ||
| 136 : | |||
| 137 : | : [char] ( compilation 'char' -- ; run-time -- n ) | ||
| 138 : | char postpone Literal ; immediate restrict | ||
| 139 : | |||
| 140 : | \ \ threading 17mar93py | ||
| 141 : | |||
| 142 : | : cfa, ( code-address -- ) \ gforth cfa-comma | ||
| 143 : | here | ||
| 144 : | dup lastcfa ! | ||
| 145 : | 0 A, 0 , code-address! ; | ||
| 146 : | |||
| 147 : | : compile, ( xt -- ) \ core-ext compile-comma | ||
| 148 : | A, ; | ||
| 149 : | |||
| 150 : | : !does ( addr -- ) \ gforth store-does | ||
| 151 : | lastxt does-code! ; | ||
| 152 : | |||
| 153 : | : (does>) ( R: addr -- ) | ||
| 154 : | r> cfaligned /does-handler + !does ; | ||
| 155 : | |||
| 156 : | : dodoes, ( -- ) | ||
| 157 : | cfalign here /does-handler allot does-handler! ; | ||
| 158 : | |||
| 159 : | : (compile) ( -- ) \ gforth | ||
| 160 : | r> dup cell+ >r @ compile, ; | ||
| 161 : | |||
| 162 : | anton | 1.4 | : postpone, ( w xt -- ) \ gforth postpone-comma |
| 163 : | pazsan | 1.1 | \g Compiles the compilation semantics represented by @var{w xt}. |
| 164 : | dup ['] execute = | ||
| 165 : | if | ||
| 166 : | drop compile, | ||
| 167 : | else | ||
| 168 : | dup ['] compile, = | ||
| 169 : | if | ||
| 170 : | drop POSTPONE (compile) compile, | ||
| 171 : | else | ||
| 172 : | swap POSTPONE aliteral compile, | ||
| 173 : | then | ||
| 174 : | then ; | ||
| 175 : | |||
| 176 : | : POSTPONE ( "name" -- ) \ core | ||
| 177 : | \g Compiles the compilation semantics of @var{name}. | ||
| 178 : | COMP' postpone, ; immediate restrict | ||
| 179 : | |||
| 180 : | struct | ||
| 181 : | >body | ||
| 182 : | cell% field interpret/compile-int | ||
| 183 : | cell% field interpret/compile-comp | ||
| 184 : | end-struct interpret/compile-struct | ||
| 185 : | |||
| 186 : | : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth | ||
| 187 : | Create immediate swap A, A, | ||
| 188 : | DOES> | ||
| 189 : | abort" executed primary cfa of an interpret/compile: word" ; | ||
| 190 : | \ state @ IF cell+ THEN perform ; | ||
| 191 : | |||
| 192 : | \ \ ticks | ||
| 193 : | |||
| 194 : | : name>comp ( nt -- w xt ) \ gforth | ||
| 195 : | \G @var{w xt} is the compilation token for the word @var{nt}. | ||
| 196 : | (name>comp) | ||
| 197 : | 1 = if | ||
| 198 : | ['] execute | ||
| 199 : | else | ||
| 200 : | ['] compile, | ||
| 201 : | then ; | ||
| 202 : | |||
| 203 : | : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick | ||
| 204 : | (') postpone ALiteral ; immediate restrict | ||
| 205 : | |||
| 206 : | : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick | ||
| 207 : | \g @var{xt} represents @var{name}'s interpretation | ||
| 208 : | \g semantics. Performs @code{-14 throw} if the word has no | ||
| 209 : | \g interpretation semantics. | ||
| 210 : | ' postpone ALiteral ; immediate restrict | ||
| 211 : | |||
| 212 : | anton | 1.5 | : COMP' ( "name" -- w xt ) \ gforth comp-tick |
| 213 : | pazsan | 1.1 | \g @var{w xt} represents @var{name}'s compilation semantics. |
| 214 : | (') name>comp ; | ||
| 215 : | |||
| 216 : | : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick | ||
| 217 : | \g @var{w xt} represents @var{name}'s compilation semantics. | ||
| 218 : | COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict | ||
| 219 : | |||
| 220 : | \ \ recurse 17may93jaw | ||
| 221 : | |||
| 222 : | : recurse ( compilation -- ; run-time ?? -- ?? ) \ core | ||
| 223 : | \g calls the current definition. | ||
| 224 : | lastxt compile, ; immediate restrict | ||
| 225 : | |||
| 226 : | \ \ compiler loop | ||
| 227 : | |||
| 228 : | : compiler ( c-addr u -- ) | ||
| 229 : | 2dup find-name dup | ||
| 230 : | if ( c-addr u nt ) | ||
| 231 : | nip nip name>comp execute | ||
| 232 : | else | ||
| 233 : | drop | ||
| 234 : | 2dup snumber? dup | ||
| 235 : | IF | ||
| 236 : | 0> | ||
| 237 : | IF | ||
| 238 : | swap postpone Literal | ||
| 239 : | THEN | ||
| 240 : | postpone Literal | ||
| 241 : | 2drop | ||
| 242 : | ELSE | ||
| 243 : | drop compiler-notfound | ||
| 244 : | THEN | ||
| 245 : | then ; | ||
| 246 : | |||
| 247 : | : [ ( -- ) \ core left-bracket | ||
| 248 : | ['] interpreter IS parser state off ; immediate | ||
| 249 : | |||
| 250 : | : ] ( -- ) \ core right-bracket | ||
| 251 : | ['] compiler IS parser state on ; | ||
| 252 : | |||
| 253 : | \ \ Strings 22feb93py | ||
| 254 : | |||
| 255 : | : ," ( "string"<"> -- ) [char] " parse | ||
| 256 : | here over char+ allot place align ; | ||
| 257 : | |||
| 258 : | : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string | ||
| 259 : | postpone (S") here over char+ allot place align ; | ||
| 260 : | immediate restrict | ||
| 261 : | |||
| 262 : | \ \ abort" 22feb93py | ||
| 263 : | |||
| 264 : | : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote | ||
| 265 : | postpone (abort") ," ; immediate restrict | ||
| 266 : | |||
| 267 : | \ \ Header states 23feb93py | ||
| 268 : | |||
| 269 : | : cset ( bmask c-addr -- ) | ||
| 270 : | tuck c@ or swap c! ; | ||
| 271 : | |||
| 272 : | : creset ( bmask c-addr -- ) | ||
| 273 : | tuck c@ swap invert and swap c! ; | ||
| 274 : | |||
| 275 : | : ctoggle ( bmask c-addr -- ) | ||
| 276 : | tuck c@ xor swap c! ; | ||
| 277 : | |||
| 278 : | : lastflags ( -- c-addr ) | ||
| 279 : | \ the address of the flags byte in the last header | ||
| 280 : | \ aborts if the last defined word was headerless | ||
| 281 : | last @ dup 0= abort" last word was headerless" cell+ ; | ||
| 282 : | |||
| 283 : | : immediate ( -- ) \ core | ||
| 284 : | immediate-mask lastflags cset ; | ||
| 285 : | |||
| 286 : | : restrict ( -- ) \ gforth | ||
| 287 : | restrict-mask lastflags cset ; | ||
| 288 : | ' restrict alias compile-only ( -- ) \ gforth | ||
| 289 : | |||
| 290 : | \ \ Create Variable User Constant 17mar93py | ||
| 291 : | |||
| 292 : | : Alias ( cfa "name" -- ) \ gforth | ||
| 293 : | Header reveal | ||
| 294 : | alias-mask lastflags creset | ||
| 295 : | dup A, lastcfa ! ; | ||
| 296 : | |||
| 297 : | doer? :dovar [IF] | ||
| 298 : | |||
| 299 : | : Create ( "name" -- ) \ core | ||
| 300 : | Header reveal dovar: cfa, ; | ||
| 301 : | [ELSE] | ||
| 302 : | |||
| 303 : | : Create ( "name" -- ) \ core | ||
| 304 : | Header reveal here lastcfa ! 0 A, 0 , DOES> ; | ||
| 305 : | [THEN] | ||
| 306 : | |||
| 307 : | : Variable ( "name" -- ) \ core | ||
| 308 : | Create 0 , ; | ||
| 309 : | |||
| 310 : | : AVariable ( "name" -- ) \ gforth | ||
| 311 : | Create 0 A, ; | ||
| 312 : | |||
| 313 : | : 2Variable ( "name" -- ) \ double | ||
| 314 : | create 0 , 0 , ; | ||
| 315 : | |||
| 316 : | : uallot ( n -- ) udp @ swap udp +! ; | ||
| 317 : | |||
| 318 : | doer? :douser [IF] | ||
| 319 : | |||
| 320 : | : User ( "name" -- ) \ gforth | ||
| 321 : | Header reveal douser: cfa, cell uallot , ; | ||
| 322 : | |||
| 323 : | : AUser ( "name" -- ) \ gforth | ||
| 324 : | User ; | ||
| 325 : | [ELSE] | ||
| 326 : | |||
| 327 : | : User Create cell uallot , DOES> @ up @ + ; | ||
| 328 : | |||
| 329 : | : AUser User ; | ||
| 330 : | [THEN] | ||
| 331 : | |||
| 332 : | doer? :docon [IF] | ||
| 333 : | : (Constant) Header reveal docon: cfa, ; | ||
| 334 : | [ELSE] | ||
| 335 : | : (Constant) Create DOES> @ ; | ||
| 336 : | [THEN] | ||
| 337 : | |||
| 338 : | : Constant ( w "name" -- ) \ core | ||
| 339 : | \G Defines constant @var{name} | ||
| 340 : | \G | ||
| 341 : | \G @var{name} execution: @var{-- w} | ||
| 342 : | (Constant) , ; | ||
| 343 : | |||
| 344 : | : AConstant ( addr "name" -- ) \ gforth | ||
| 345 : | (Constant) A, ; | ||
| 346 : | |||
| 347 : | : Value ( w "name" -- ) \ core-ext | ||
| 348 : | (Constant) , ; | ||
| 349 : | |||
| 350 : | : 2Constant ( w1 w2 "name" -- ) \ double | ||
| 351 : | Create ( w1 w2 "name" -- ) | ||
| 352 : | 2, | ||
| 353 : | DOES> ( -- w1 w2 ) | ||
| 354 : | 2@ ; | ||
| 355 : | |||
| 356 : | doer? :dofield [IF] | ||
| 357 : | : (Field) Header reveal dofield: cfa, ; | ||
| 358 : | [ELSE] | ||
| 359 : | : (Field) Create DOES> @ + ; | ||
| 360 : | [THEN] | ||
| 361 : | \ IS Defer What's Defers TO 24feb93py | ||
| 362 : | |||
| 363 : | doer? :dodefer [IF] | ||
| 364 : | |||
| 365 : | : Defer ( "name" -- ) \ gforth | ||
| 366 : | \ !! shouldn't it be initialized with abort or something similar? | ||
| 367 : | Header Reveal dodefer: cfa, | ||
| 368 : | ['] noop A, ; | ||
| 369 : | [ELSE] | ||
| 370 : | |||
| 371 : | : Defer ( "name" -- ) \ gforth | ||
| 372 : | Create ['] noop A, | ||
| 373 : | DOES> @ execute ; | ||
| 374 : | [THEN] | ||
| 375 : | |||
| 376 : | : Defers ( "name" -- ) \ gforth | ||
| 377 : | ' >body @ compile, ; immediate | ||
| 378 : | |||
| 379 : | \ \ : ; 24feb93py | ||
| 380 : | |||
| 381 : | defer :-hook ( sys1 -- sys2 ) | ||
| 382 : | |||
| 383 : | defer ;-hook ( sys2 -- sys1 ) | ||
| 384 : | |||
| 385 : | : : ( "name" -- colon-sys ) \ core colon | ||
| 386 : | Header docol: cfa, defstart ] :-hook ; | ||
| 387 : | |||
| 388 : | : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon | ||
| 389 : | ;-hook ?struc postpone exit reveal postpone [ ; immediate restrict | ||
| 390 : | |||
| 391 : | : :noname ( -- xt colon-sys ) \ core-ext colon-no-name | ||
| 392 : | 0 last ! | ||
| 393 : | cfalign here docol: cfa, 0 ] :-hook ; | ||
| 394 : | |||
| 395 : | \ \ Search list handling: reveal words, recursive 23feb93py | ||
| 396 : | |||
| 397 : | : last? ( -- false / nfa nfa ) | ||
| 398 : | last @ ?dup ; | ||
| 399 : | |||
| 400 : | : (reveal) ( nt wid -- ) | ||
| 401 : | pazsan | 1.3 | wordlist-id dup >r |
| 402 : | pazsan | 1.1 | @ over ( name>link ) ! |
| 403 : | r> ! ; | ||
| 404 : | |||
| 405 : | \ make entry in wordlist-map | ||
| 406 : | ' (reveal) f83search reveal-method ! | ||
| 407 : | |||
| 408 : | Variable warnings ( -- addr ) \ gforth | ||
| 409 : | G -1 warnings T ! | ||
| 410 : | |||
| 411 : | : check-shadow ( addr count wid -- ) | ||
| 412 : | pazsan | 1.2 | \G prints a warning if the string is already present in the wordlist |
| 413 : | >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if | ||
| 414 : | >stderr | ||
| 415 : | ." redefined " name>string 2dup type | ||
| 416 : | compare 0<> if | ||
| 417 : | ." with " type | ||
| 418 : | else | ||
| 419 : | 2drop | ||
| 420 : | then | ||
| 421 : | space space EXIT | ||
| 422 : | then | ||
| 423 : | 2drop 2drop ; | ||
| 424 : | pazsan | 1.1 | |
| 425 : | : reveal ( -- ) \ gforth | ||
| 426 : | last? | ||
| 427 : | if \ the last word has a header | ||
| 428 : | dup ( name>link ) @ 1 and | ||
| 429 : | if \ it is still hidden | ||
| 430 : | dup ( name>link ) @ 1 xor ( nt wid ) | ||
| 431 : | 2dup >r name>string r> check-shadow ( nt wid ) | ||
| 432 : | dup wordlist-map @ reveal-method perform | ||
| 433 : | else | ||
| 434 : | drop | ||
| 435 : | then | ||
| 436 : | then ; | ||
| 437 : | |||
| 438 : | : rehash ( wid -- ) | ||
| 439 : | dup wordlist-map @ rehash-method perform ; | ||
| 440 : | |||
| 441 : | ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth | ||
| 442 : | \g makes the current definition visible, enabling it to call itself | ||
| 443 : | \g recursively. | ||
| 444 : | immediate restrict |
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