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annotate macro.c @ 48:0af03c5571e0
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| author | David A. Holland |
|---|---|
| date | Sat, 30 Mar 2013 23:29:08 -0400 |
| parents | 2e25e55dba6b |
| children | bbbf71859a21 |
| rev | line source |
|---|---|
| 30 | 1 /*- |
| 2 * Copyright (c) 2010 The NetBSD Foundation, Inc. | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This code is derived from software contributed to The NetBSD Foundation | |
| 6 * by David A. Holland. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * 1. Redistributions of source code must retain the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer. | |
| 13 * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer in the | |
| 15 * documentation and/or other materials provided with the distribution. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | |
| 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | |
| 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 27 * POSSIBILITY OF SUCH DAMAGE. | |
| 28 */ | |
| 29 | |
| 33 | 30 #include <stdint.h> |
| 17 | 31 #include <stdlib.h> |
| 32 #include <string.h> | |
| 33 | |
| 34 #include "array.h" | |
| 35 #include "mode.h" | |
| 36 #include "place.h" | |
| 37 #include "macro.h" | |
| 19 | 38 #include "output.h" |
| 39 | |
| 40 struct expansionitem { | |
| 41 bool isstring; | |
| 42 union { | |
| 43 char *string; | |
| 44 unsigned param; | |
| 45 }; | |
| 46 }; | |
|
47
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parents:
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47 DECLARRAY(expansionitem, static __unused); |
|
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48 DEFARRAY(expansionitem, static); |
| 17 | 49 |
| 50 struct macro { | |
| 51 struct place defplace; | |
| 52 struct place expansionplace; | |
| 53 unsigned hash; | |
| 54 char *name; | |
| 18 | 55 bool hasparams; |
| 56 struct stringarray params; | |
| 19 | 57 struct expansionitemarray expansion; |
| 58 bool inuse; | |
| 17 | 59 }; |
|
47
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parents:
42
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changeset
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60 DECLARRAY(macro, static __unused); |
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61 DEFARRAY(macro, static); |
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62 DECLARRAY(macroarray, static __unused); |
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parents:
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changeset
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63 DEFARRAY(macroarray, static); |
| 17 | 64 |
| 65 static struct macroarrayarray macros; | |
| 66 static unsigned total_macros; | |
| 67 static unsigned hashmask; | |
| 68 | |
| 69 //////////////////////////////////////////////////////////// | |
| 70 // macro structure ops | |
| 71 | |
| 72 static | |
| 19 | 73 struct expansionitem * |
| 74 expansionitem_create_string(const char *string) | |
| 75 { | |
| 76 struct expansionitem *ei; | |
| 77 | |
| 78 ei = domalloc(sizeof(*ei)); | |
| 79 ei->isstring = true; | |
| 80 ei->string = dostrdup(string); | |
| 81 return ei; | |
| 82 } | |
| 83 | |
| 84 static | |
| 85 struct expansionitem * | |
| 86 expansionitem_create_stringlen(const char *string, size_t len) | |
| 87 { | |
| 88 struct expansionitem *ei; | |
| 89 | |
| 90 ei = domalloc(sizeof(*ei)); | |
| 91 ei->isstring = true; | |
| 92 ei->string = dostrndup(string, len); | |
| 93 return ei; | |
| 94 } | |
| 95 | |
| 96 static | |
| 97 struct expansionitem * | |
| 98 expansionitem_create_param(unsigned param) | |
| 99 { | |
| 100 struct expansionitem *ei; | |
| 101 | |
| 102 ei = domalloc(sizeof(*ei)); | |
| 103 ei->isstring = false; | |
| 104 ei->param = param; | |
| 105 return ei; | |
| 106 } | |
| 107 | |
| 108 static | |
| 109 void | |
| 110 expansionitem_destroy(struct expansionitem *ei) | |
| 111 { | |
| 112 if (ei->isstring) { | |
|
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113 dostrfree(ei->string); |
| 19 | 114 } |
|
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115 dofree(ei, sizeof(*ei)); |
| 19 | 116 } |
| 117 | |
| 118 static | |
| 119 bool | |
| 120 expansionitem_eq(const struct expansionitem *ei1, | |
| 121 const struct expansionitem *ei2) | |
| 122 { | |
| 123 if (ei1->isstring != ei2->isstring) { | |
| 124 return false; | |
| 125 } | |
| 126 if (ei1->isstring) { | |
| 127 if (strcmp(ei1->string, ei2->string) != 0) { | |
| 128 return false; | |
| 129 } | |
| 130 } else { | |
| 131 if (ei1->param != ei2->param) { | |
| 132 return false; | |
| 133 } | |
| 134 } | |
| 135 return true; | |
| 136 } | |
| 137 | |
| 138 static | |
| 17 | 139 struct macro * |
| 18 | 140 macro_create(struct place *p1, const char *name, unsigned hash, |
| 19 | 141 struct place *p2) |
| 17 | 142 { |
| 143 struct macro *m; | |
| 144 | |
| 145 m = domalloc(sizeof(*m)); | |
| 146 m->defplace = *p1; | |
| 147 m->expansionplace = *p2; | |
| 148 m->hash = hash; | |
| 149 m->name = dostrdup(name); | |
| 18 | 150 m->hasparams = false; |
| 151 stringarray_init(&m->params); | |
| 19 | 152 expansionitemarray_init(&m->expansion); |
| 153 m->inuse = false; | |
| 17 | 154 return m; |
| 155 } | |
| 156 | |
| 19 | 157 DESTROYALL_ARRAY(expansionitem, ); |
| 158 | |
| 17 | 159 static |
| 160 void | |
| 161 macro_destroy(struct macro *m) | |
| 162 { | |
| 19 | 163 expansionitemarray_destroyall(&m->expansion); |
| 164 expansionitemarray_cleanup(&m->expansion); | |
|
39
337110e7240a
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David A. Holland
parents:
38
diff
changeset
|
165 dostrfree(m->name); |
|
337110e7240a
Pass the size to free; it makes debug checking easier.
David A. Holland
parents:
38
diff
changeset
|
166 dofree(m, sizeof(*m)); |
| 17 | 167 } |
| 168 | |
| 18 | 169 static |
| 170 bool | |
| 171 macro_eq(const struct macro *m1, const struct macro *m2) | |
| 172 { | |
| 173 unsigned num1, num2, i; | |
| 19 | 174 struct expansionitem *ei1, *ei2; |
| 18 | 175 const char *p1, *p2; |
| 176 | |
| 177 if (strcmp(m1->name, m2->name) != 0) { | |
| 178 return false; | |
| 179 } | |
| 180 | |
| 181 if (m1->hasparams != m2->hasparams) { | |
| 182 return false; | |
| 183 } | |
| 184 | |
| 19 | 185 num1 = expansionitemarray_num(&m1->expansion); |
| 186 num2 = expansionitemarray_num(&m2->expansion); | |
| 187 if (num1 != num2) { | |
| 18 | 188 return false; |
| 189 } | |
| 190 | |
| 19 | 191 for (i=0; i<num1; i++) { |
| 192 ei1 = expansionitemarray_get(&m1->expansion, i); | |
| 193 ei2 = expansionitemarray_get(&m2->expansion, i); | |
| 194 if (!expansionitem_eq(ei1, ei2)) { | |
| 195 return false; | |
| 196 } | |
| 197 } | |
| 198 | |
| 18 | 199 num1 = stringarray_num(&m1->params); |
| 200 num2 = stringarray_num(&m2->params); | |
| 201 if (num1 != num2) { | |
| 202 return false; | |
| 203 } | |
| 204 | |
| 205 for (i=0; i<num1; i++) { | |
| 206 p1 = stringarray_get(&m1->params, i); | |
| 207 p2 = stringarray_get(&m2->params, i); | |
| 208 if (strcmp(p1, p2) != 0) { | |
| 209 return false; | |
| 210 } | |
| 211 } | |
| 212 return true; | |
| 213 } | |
| 214 | |
| 17 | 215 //////////////////////////////////////////////////////////// |
| 216 // macro table | |
| 217 | |
| 218 /* | |
| 219 * Unless I've screwed up, this is something called Fletcher's Checksum | |
| 220 * that showed up in Dr. Dobbs in, according to my notes, May 1992. The | |
| 221 * implementation is new. | |
| 222 */ | |
| 223 static | |
| 224 unsigned | |
| 19 | 225 hashfunc(const char *s, size_t len) |
| 17 | 226 { |
| 227 uint16_t x1, x2, a; | |
| 19 | 228 size_t i; |
| 17 | 229 |
| 230 x1 = (uint16_t) (len >> 16); | |
| 231 x2 = (uint16_t) (len); | |
| 232 if (x1==0) { | |
| 233 x1++; | |
| 234 } | |
| 235 if (x2==0) { | |
| 236 x2++; | |
| 237 } | |
| 238 | |
| 239 for (i=0; i<len; i+=2) { | |
| 240 if (i==len-1) { | |
| 241 a = (unsigned char)s[i]; | |
| 242 /* don't run off the end of the array */ | |
| 243 } | |
| 244 else { | |
| 245 a = (unsigned char)s[i] + | |
| 246 ((uint16_t)(unsigned char)s[i+1] << 8); | |
| 247 } | |
| 248 x1 += a; | |
| 249 if (x1 < a) { | |
| 250 x1++; | |
| 251 } | |
| 252 x2 += x1; | |
| 253 if (x2 < x1) { | |
| 254 x2++; | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 x1 ^= 0xffff; | |
| 259 x2 ^= 0xffff; | |
| 260 return ((uint32_t)x2)*65535U + x1; | |
| 261 } | |
| 262 | |
| 263 static | |
| 264 void | |
| 265 macrotable_init(void) | |
| 266 { | |
| 267 unsigned i; | |
| 268 | |
| 269 macroarrayarray_init(¯os); | |
| 270 macroarrayarray_setsize(¯os, 4); | |
| 271 for (i=0; i<4; i++) { | |
| 272 macroarrayarray_set(¯os, i, NULL); | |
| 273 } | |
| 274 total_macros = 0; | |
| 275 hashmask = 0x3; | |
| 276 } | |
| 277 | |
| 278 DESTROYALL_ARRAY(macro, ); | |
| 279 | |
| 280 static | |
| 281 void | |
| 282 macrotable_cleanup(void) | |
| 283 { | |
| 284 struct macroarray *bucket; | |
| 285 unsigned numbuckets, i; | |
| 286 | |
| 287 numbuckets = macroarrayarray_num(¯os); | |
| 288 for (i=0; i<numbuckets; i++) { | |
| 289 bucket = macroarrayarray_get(¯os, i); | |
| 28 | 290 if (bucket != NULL) { |
| 291 macroarray_destroyall(bucket); | |
| 292 macroarray_destroy(bucket); | |
| 293 } | |
| 17 | 294 } |
| 295 macroarrayarray_setsize(¯os, 0); | |
| 296 macroarrayarray_cleanup(¯os); | |
| 297 } | |
| 298 | |
| 299 static | |
| 300 struct macro * | |
| 19 | 301 macrotable_findlen(const char *name, size_t len, bool remove) |
| 17 | 302 { |
| 303 unsigned hash; | |
| 304 struct macroarray *bucket; | |
| 305 struct macro *m, *m2; | |
| 306 unsigned i, num; | |
| 19 | 307 size_t mlen; |
| 17 | 308 |
| 19 | 309 hash = hashfunc(name, len); |
| 17 | 310 bucket = macroarrayarray_get(¯os, hash & hashmask); |
| 311 if (bucket == NULL) { | |
| 312 return NULL; | |
| 313 } | |
| 314 num = macroarray_num(bucket); | |
| 315 for (i=0; i<num; i++) { | |
| 316 m = macroarray_get(bucket, i); | |
| 317 if (hash != m->hash) { | |
| 318 continue; | |
| 319 } | |
| 19 | 320 mlen = strlen(m->name); |
| 321 if (len == mlen && !memcmp(name, m->name, len)) { | |
| 17 | 322 if (remove) { |
| 323 if (i < num-1) { | |
| 324 m2 = macroarray_get(bucket, num-1); | |
| 325 macroarray_set(bucket, i, m2); | |
| 326 } | |
| 327 macroarray_setsize(bucket, num-1); | |
| 328 total_macros--; | |
| 329 } | |
| 330 return m; | |
| 331 } | |
| 332 } | |
| 333 return NULL; | |
| 334 } | |
| 335 | |
| 336 static | |
| 19 | 337 struct macro * |
| 338 macrotable_find(const char *name, bool remove) | |
| 339 { | |
| 340 return macrotable_findlen(name, strlen(name), remove); | |
| 341 } | |
| 342 | |
| 343 static | |
| 17 | 344 void |
| 345 macrotable_rehash(void) | |
| 346 { | |
| 347 struct macroarray *newbucket, *oldbucket; | |
| 348 struct macro *m; | |
| 349 unsigned newmask, tossbit; | |
| 350 unsigned numbuckets, i; | |
| 351 unsigned oldnum, j, k; | |
| 352 | |
| 353 numbuckets = macroarrayarray_num(¯os); | |
| 354 macroarrayarray_setsize(¯os, numbuckets*2); | |
| 355 | |
| 356 assert(hashmask == numbuckets - 1); | |
| 357 newmask = (hashmask << 1) | 1U; | |
| 358 tossbit = newmask && ~hashmask; | |
| 359 hashmask = newmask; | |
| 360 | |
| 361 for (i=0; i<numbuckets; i++) { | |
| 362 newbucket = NULL; | |
| 363 oldbucket = macroarrayarray_get(¯os, i); | |
| 364 oldnum = macroarray_num(oldbucket); | |
| 365 for (j=0; j<oldnum; j++) { | |
| 366 m = macroarray_get(oldbucket, j); | |
| 367 if (m->hash & tossbit) { | |
| 368 if (newbucket == NULL) { | |
| 369 newbucket = macroarray_create(); | |
| 370 } | |
| 371 macroarray_set(oldbucket, j, NULL); | |
| 372 macroarray_add(newbucket, m, NULL); | |
| 373 } | |
| 374 } | |
| 375 for (j=k=0; j<oldnum; j++) { | |
| 376 m = macroarray_get(oldbucket, j); | |
| 377 if (m != NULL && k < j) { | |
| 378 macroarray_set(oldbucket, k++, m); | |
| 379 } | |
| 380 } | |
| 381 macroarray_setsize(oldbucket, k); | |
| 382 macroarrayarray_set(¯os, numbuckets + i, newbucket); | |
| 383 } | |
| 384 } | |
| 385 | |
| 386 static | |
| 387 void | |
| 388 macrotable_add(struct macro *m) | |
| 389 { | |
| 390 unsigned hash; | |
| 391 struct macroarray *bucket; | |
| 392 unsigned numbuckets; | |
| 393 | |
| 394 numbuckets = macroarrayarray_num(¯os); | |
| 395 if (total_macros > 0 && total_macros / numbuckets > 9) { | |
| 396 macrotable_rehash(); | |
| 397 } | |
| 398 | |
| 19 | 399 hash = hashfunc(m->name, strlen(m->name)); |
| 17 | 400 bucket = macroarrayarray_get(¯os, hash & hashmask); |
| 401 if (bucket == NULL) { | |
| 402 bucket = macroarray_create(); | |
| 403 macroarrayarray_set(¯os, hash & hashmask, bucket); | |
| 404 } | |
| 405 macroarray_add(bucket, m, NULL); | |
| 406 total_macros++; | |
| 407 } | |
| 408 | |
| 409 //////////////////////////////////////////////////////////// | |
| 410 // external macro definition interface | |
| 411 | |
| 18 | 412 static |
| 413 struct macro * | |
| 414 macro_define_common_start(struct place *p1, const char *macro, | |
| 19 | 415 struct place *p2) |
| 17 | 416 { |
| 417 struct macro *m; | |
| 19 | 418 unsigned hash; |
| 17 | 419 |
| 18 | 420 if (!is_identifier(macro)) { |
| 421 complain(p1, "Invalid macro name %s", macro); | |
| 422 complain_fail(); | |
| 423 } | |
| 424 | |
| 19 | 425 hash = hashfunc(macro, strlen(macro)); |
| 426 m = macro_create(p1, macro, hash, p2); | |
| 18 | 427 return m; |
| 428 } | |
| 429 | |
| 430 static | |
| 431 void | |
| 432 macro_define_common_end(struct macro *m) | |
| 433 { | |
| 434 struct macro *oldm; | |
| 435 bool ok; | |
| 436 | |
| 437 oldm = macrotable_find(m->name, false); | |
| 438 if (oldm != NULL) { | |
| 439 ok = macro_eq(m, oldm); | |
| 440 if (ok) { | |
| 441 complain(&m->defplace, | |
| 442 "Warning: redefinition of %s", m->name); | |
| 17 | 443 if (mode.werror) { |
| 444 complain_fail(); | |
| 445 } | |
| 18 | 446 } else { |
| 447 complain(&m->defplace, | |
| 448 "Redefinition of %s is not identical", | |
| 449 m->name); | |
| 450 complain_fail(); | |
| 17 | 451 } |
| 18 | 452 complain(&oldm->defplace, "Previous definition was here"); |
| 453 macro_destroy(m); | |
| 17 | 454 return; |
| 455 } | |
| 18 | 456 macrotable_add(m); |
| 457 } | |
| 17 | 458 |
| 18 | 459 static |
| 460 void | |
| 461 macro_parse_parameters(struct macro *m, struct place *p, const char *params) | |
| 462 { | |
| 463 size_t len; | |
| 464 const char *s; | |
| 465 char *param; | |
| 466 | |
| 467 while (params != NULL) { | |
| 468 len = strspn(params, ws); | |
| 469 params += len; | |
| 470 p->column += len; | |
| 471 s = strchr(params, ','); | |
| 472 if (s) { | |
| 473 len = s-params; | |
| 474 param = dostrndup(params, len); | |
| 475 s++; | |
| 476 } else { | |
| 477 len = strlen(params); | |
| 478 param = dostrndup(params, len); | |
| 479 } | |
| 480 notrailingws(param, strlen(param)); | |
| 481 if (!is_identifier(param)) { | |
| 482 complain(p, "Invalid macro parameter name %s", param); | |
| 483 complain_fail(); | |
| 484 } else { | |
| 485 stringarray_add(&m->params, param, NULL); | |
| 486 } | |
| 487 params = s; | |
| 488 p->column += len; | |
| 489 } | |
| 490 } | |
| 491 | |
| 19 | 492 static |
| 493 bool | |
| 494 isparam(struct macro *m, const char *name, size_t len, unsigned *num_ret) | |
| 495 { | |
| 496 unsigned num, i; | |
| 497 const char *param; | |
| 498 | |
| 499 num = stringarray_num(&m->params); | |
| 500 for (i=0; i<num; i++) { | |
| 501 param = stringarray_get(&m->params, i); | |
| 27 | 502 if (strlen(param) == len && !memcmp(name, param, len)) { |
| 19 | 503 *num_ret = i; |
| 504 return true; | |
| 505 } | |
| 506 } | |
| 507 return false; | |
| 508 } | |
| 509 | |
| 510 static | |
| 511 void | |
| 512 macro_parse_expansion(struct macro *m, const char *buf) | |
| 513 { | |
| 514 size_t blockstart, wordstart, pos; | |
| 515 struct expansionitem *ei; | |
| 516 unsigned param; | |
| 517 | |
| 518 pos = blockstart = 0; | |
| 519 while (buf[pos] != '\0') { | |
| 520 pos += strspn(buf+pos, ws); | |
| 521 if (strchr(alnum, buf[pos])) { | |
| 522 wordstart = pos; | |
| 523 pos += strspn(buf+pos, alnum); | |
| 524 if (isparam(m, buf+wordstart, pos-wordstart, ¶m)) { | |
| 525 if (pos > blockstart) { | |
| 526 ei = expansionitem_create_stringlen( | |
| 527 buf + blockstart, | |
| 27 | 528 wordstart - blockstart); |
| 19 | 529 expansionitemarray_add(&m->expansion, |
| 530 ei, NULL); | |
| 531 } | |
| 532 ei = expansionitem_create_param(param); | |
| 533 expansionitemarray_add(&m->expansion, ei,NULL); | |
| 534 blockstart = pos; | |
| 535 continue; | |
| 536 } | |
| 537 continue; | |
| 538 } | |
| 539 pos++; | |
| 540 } | |
| 541 if (pos > blockstart) { | |
| 542 ei = expansionitem_create_stringlen(buf + blockstart, | |
| 25 | 543 pos - blockstart); |
| 19 | 544 expansionitemarray_add(&m->expansion, ei, NULL); |
| 545 } | |
| 546 } | |
| 547 | |
| 18 | 548 void |
| 549 macro_define_plain(struct place *p1, const char *macro, | |
| 550 struct place *p2, const char *expansion) | |
| 551 { | |
| 552 struct macro *m; | |
| 19 | 553 struct expansionitem *ei; |
| 18 | 554 |
| 19 | 555 m = macro_define_common_start(p1, macro, p2); |
| 556 ei = expansionitem_create_string(expansion); | |
| 557 expansionitemarray_add(&m->expansion, ei, NULL); | |
| 18 | 558 macro_define_common_end(m); |
| 559 } | |
| 560 | |
| 561 void | |
| 562 macro_define_params(struct place *p1, const char *macro, | |
| 563 struct place *p2, const char *params, | |
| 564 struct place *p3, const char *expansion) | |
| 565 { | |
| 566 struct macro *m; | |
| 567 | |
| 19 | 568 m = macro_define_common_start(p1, macro, p3); |
| 25 | 569 m->hasparams = true; |
| 18 | 570 macro_parse_parameters(m, p2, params); |
| 19 | 571 macro_parse_expansion(m, expansion); |
| 18 | 572 macro_define_common_end(m); |
| 17 | 573 } |
| 574 | |
| 575 void | |
| 576 macro_undef(const char *macro) | |
| 577 { | |
| 578 struct macro *m; | |
| 579 | |
| 580 m = macrotable_find(macro, true); | |
| 581 if (m) { | |
| 582 macro_destroy(m); | |
| 583 } | |
| 584 } | |
| 585 | |
| 586 bool | |
| 587 macro_isdefined(const char *macro) | |
| 588 { | |
| 589 struct macro *m; | |
| 590 | |
| 591 m = macrotable_find(macro, false); | |
| 592 return m != NULL; | |
| 593 } | |
| 594 | |
| 595 //////////////////////////////////////////////////////////// | |
| 596 // macro expansion | |
| 597 | |
| 19 | 598 struct expstate { |
| 599 bool honordefined; | |
| 600 enum { ES_NORMAL, ES_WANTLPAREN, ES_NOARG, ES_HAVEARG } state; | |
| 601 struct macro *curmacro; | |
| 602 struct stringarray args; | |
| 603 unsigned argparens; | |
| 604 | |
| 605 bool tobuf; | |
| 606 char *buf; | |
| 607 size_t bufpos, bufmax; | |
| 608 }; | |
| 609 | |
| 610 static struct expstate mainstate; | |
| 611 | |
| 612 static void doexpand(struct expstate *es, struct place *p, | |
| 613 char *buf, size_t len); | |
| 614 | |
| 615 static | |
| 616 void | |
| 617 expstate_init(struct expstate *es, bool tobuf, bool honordefined) | |
| 618 { | |
| 619 es->honordefined = honordefined; | |
| 620 es->state = ES_NORMAL; | |
| 621 es->curmacro = NULL; | |
| 622 stringarray_init(&es->args); | |
| 623 es->argparens = 0; | |
| 624 es->tobuf = tobuf; | |
| 625 es->buf = NULL; | |
| 626 es->bufpos = 0; | |
| 627 es->bufmax = 0; | |
| 628 } | |
| 629 | |
| 630 static | |
| 631 void | |
| 632 expstate_cleanup(struct expstate *es) | |
| 633 { | |
| 634 assert(es->state == ES_NORMAL); | |
| 635 stringarray_cleanup(&es->args); | |
| 636 if (es->buf) { | |
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637 dofree(es->buf, es->bufmax); |
| 19 | 638 } |
| 639 } | |
| 640 | |
| 641 static | |
| 642 void | |
| 643 expstate_destroyargs(struct expstate *es) | |
| 644 { | |
| 645 unsigned i, num; | |
| 646 | |
| 647 num = stringarray_num(&es->args); | |
| 648 for (i=0; i<num; i++) { | |
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649 dostrfree(stringarray_get(&es->args, i)); |
| 19 | 650 } |
| 651 stringarray_setsize(&es->args, 0); | |
| 652 } | |
| 653 | |
| 654 static | |
| 655 void | |
| 21 | 656 expand_send(struct expstate *es, struct place *p, const char *buf, size_t len) |
| 19 | 657 { |
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658 size_t oldmax; |
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659 |
| 19 | 660 if (es->tobuf) { |
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661 assert(es->bufpos <= es->bufmax); |
| 19 | 662 if (es->bufpos + len > es->bufmax) { |
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663 oldmax = es->bufmax; |
| 19 | 664 if (es->bufmax == 0) { |
| 665 es->bufmax = 64; | |
| 666 } | |
| 667 while (es->bufpos + len > es->bufmax) { | |
| 668 es->bufmax *= 2; | |
| 669 } | |
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670 es->buf = dorealloc(es->buf, oldmax, es->bufmax); |
| 19 | 671 } |
| 672 memcpy(es->buf + es->bufpos, buf, len); | |
| 673 es->bufpos += len; | |
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674 assert(es->bufpos <= es->bufmax); |
| 19 | 675 } else { |
| 21 | 676 output(p, buf, len); |
| 19 | 677 } |
| 678 } | |
| 679 | |
| 680 static | |
| 681 void | |
| 21 | 682 expand_send_eof(struct expstate *es, struct place *p) |
| 19 | 683 { |
| 684 if (es->tobuf) { | |
| 21 | 685 expand_send(es, p, "", 1); |
| 19 | 686 es->bufpos--; |
| 687 } else { | |
| 688 output_eof(); | |
| 689 } | |
| 690 } | |
| 691 | |
| 692 static | |
| 693 void | |
| 694 expand_newarg(struct expstate *es, char *buf, size_t len) | |
| 695 { | |
| 696 char *text; | |
| 697 | |
| 698 text = dostrndup(buf, len); | |
| 699 stringarray_add(&es->args, text, NULL); | |
| 700 } | |
| 701 | |
| 702 static | |
| 703 void | |
| 704 expand_appendarg(struct expstate *es, char *buf, size_t len) | |
| 705 { | |
| 706 unsigned num; | |
| 707 char *text; | |
| 708 size_t oldlen; | |
| 709 | |
| 710 num = stringarray_num(&es->args); | |
| 711 assert(num > 0); | |
| 712 | |
| 713 text = stringarray_get(&es->args, num - 1); | |
| 714 oldlen = strlen(text); | |
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715 text = dorealloc(text, oldlen + 1, oldlen + len + 1); |
| 19 | 716 memcpy(text + oldlen, buf, len); |
| 717 text[oldlen+len] = '\0'; | |
| 718 stringarray_set(&es->args, num - 1, text); | |
| 719 } | |
| 720 | |
| 721 static | |
| 722 char * | |
| 28 | 723 expand_substitute(struct place *p, struct expstate *es) |
| 19 | 724 { |
| 725 struct expansionitem *ei; | |
| 726 unsigned i, num; | |
| 727 size_t len; | |
| 728 char *arg; | |
| 729 char *ret; | |
| 28 | 730 unsigned numargs, numparams; |
| 731 | |
| 732 numargs = stringarray_num(&es->args); | |
| 733 numparams = stringarray_num(&es->curmacro->params); | |
| 734 | |
| 735 if (numargs == 0 && numparams == 1) { | |
| 736 /* no arguments <=> one empty argument */ | |
| 737 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 738 numargs++; | |
| 739 } | |
| 740 if (numargs != numparams) { | |
| 741 complain(p, "Wrong number of arguments for macro %s; " | |
| 742 "found %u, expected %u", | |
| 743 es->curmacro->name, numargs, numparams); | |
| 744 complain_fail(); | |
| 745 while (numargs < numparams) { | |
| 746 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 747 numargs++; | |
| 748 } | |
| 749 } | |
| 19 | 750 |
| 751 len = 0; | |
| 752 num = expansionitemarray_num(&es->curmacro->expansion); | |
| 753 for (i=0; i<num; i++) { | |
| 754 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
| 755 if (ei->isstring) { | |
| 756 len += strlen(ei->string); | |
| 757 } else { | |
| 758 arg = stringarray_get(&es->args, ei->param); | |
| 759 len += strlen(arg); | |
| 760 } | |
| 761 } | |
| 762 | |
| 763 ret = domalloc(len+1); | |
| 764 *ret = '\0'; | |
| 765 for (i=0; i<num; i++) { | |
| 766 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
| 767 if (ei->isstring) { | |
| 768 strcat(ret, ei->string); | |
| 769 } else { | |
| 770 arg = stringarray_get(&es->args, ei->param); | |
| 771 strcat(ret, arg); | |
| 772 } | |
| 773 } | |
| 774 | |
| 775 return ret; | |
| 776 } | |
| 777 | |
| 778 static | |
| 779 void | |
| 780 expand_domacro(struct expstate *es, struct place *p) | |
| 781 { | |
| 782 struct macro *m; | |
| 783 char *newbuf, *newbuf2; | |
| 784 | |
| 785 if (es->curmacro == NULL) { | |
| 786 /* defined() */ | |
| 787 if (stringarray_num(&es->args) != 1) { | |
| 788 complain(p, "Too many arguments for defined()"); | |
| 789 complain_fail(); | |
| 21 | 790 expand_send(es, p, "0", 1); |
| 19 | 791 return; |
| 792 } | |
| 793 m = macrotable_find(stringarray_get(&es->args, 0), false); | |
| 21 | 794 expand_send(es, p, (m != NULL) ? "1" : "0", 1); |
| 25 | 795 expstate_destroyargs(es); |
| 19 | 796 return; |
| 797 } | |
| 798 | |
| 799 assert(es->curmacro->inuse == false); | |
| 800 es->curmacro->inuse = true; | |
| 801 | |
| 28 | 802 newbuf = expand_substitute(p, es); |
| 19 | 803 newbuf2 = macroexpand(p, newbuf, strlen(newbuf), false); |
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804 dostrfree(newbuf); |
| 25 | 805 expstate_destroyargs(es); |
| 19 | 806 doexpand(es, p, newbuf2, strlen(newbuf2)); |
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807 dostrfree(newbuf2); |
| 19 | 808 |
| 809 es->curmacro->inuse = false; | |
| 810 } | |
| 811 | |
| 812 static | |
| 813 void | |
| 814 expand_got_ws(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 815 { | |
| 816 switch (es->state) { | |
| 817 case ES_NORMAL: | |
| 21 | 818 expand_send(es, p, buf, len); |
| 19 | 819 break; |
| 820 case ES_WANTLPAREN: | |
| 821 break; | |
| 822 case ES_NOARG: | |
| 823 break; | |
| 824 case ES_HAVEARG: | |
| 825 expand_appendarg(es, buf, len); | |
| 826 break; | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 static | |
| 831 void | |
| 832 expand_got_word(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 833 { | |
| 834 struct macro *m; | |
| 835 struct expansionitem *ei; | |
| 836 char *newbuf; | |
| 17 | 837 |
| 19 | 838 switch (es->state) { |
| 839 case ES_NORMAL: | |
| 840 if (es->honordefined && | |
| 841 len == 7 && !memcmp(buf, "defined", 7)) { | |
| 842 es->curmacro = NULL; | |
| 843 es->state = ES_WANTLPAREN; | |
| 844 break; | |
| 845 } | |
| 846 m = macrotable_findlen(buf, len, false); | |
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847 if (m == NULL || m->inuse) { |
| 21 | 848 expand_send(es, p, buf, len); |
| 19 | 849 } else if (!m->hasparams) { |
| 850 m->inuse = true; | |
| 851 assert(expansionitemarray_num(&m->expansion) == 1); | |
| 852 ei = expansionitemarray_get(&m->expansion, 0); | |
| 853 assert(ei->isstring); | |
| 854 newbuf = macroexpand(p, ei->string, | |
| 855 strlen(ei->string), false); | |
| 856 doexpand(es, p, newbuf, strlen(newbuf)); | |
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857 dostrfree(newbuf); |
| 19 | 858 m->inuse = false; |
| 859 } else { | |
| 860 es->curmacro = m; | |
| 861 es->state = ES_WANTLPAREN; | |
| 862 } | |
| 863 break; | |
| 864 case ES_WANTLPAREN: | |
| 865 if (es->curmacro != NULL) { | |
| 866 complain(p, "Expected arguments for macro %s", | |
| 867 es->curmacro->name); | |
| 868 complain_fail(); | |
| 869 } else { | |
| 870 /* "defined foo" means "defined(foo)" */ | |
| 871 expand_newarg(es, buf, len); | |
| 872 es->state = ES_NORMAL; | |
| 873 expand_domacro(es, p); | |
| 874 break; | |
| 875 } | |
| 876 break; | |
| 877 case ES_NOARG: | |
| 878 expand_newarg(es, buf, len); | |
| 879 es->state = ES_HAVEARG; | |
| 880 break; | |
| 881 case ES_HAVEARG: | |
| 882 expand_appendarg(es, buf, len); | |
| 883 break; | |
| 884 } | |
| 885 } | |
| 886 | |
| 887 static | |
| 888 void | |
| 889 expand_got_lparen(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 890 { | |
| 891 switch (es->state) { | |
| 892 case ES_NORMAL: | |
| 21 | 893 expand_send(es, p, buf, len); |
| 19 | 894 break; |
| 895 case ES_WANTLPAREN: | |
| 896 es->state = ES_NOARG; | |
| 897 break; | |
| 898 case ES_NOARG: | |
| 899 expand_newarg(es, buf, len); | |
| 900 es->state = ES_HAVEARG; | |
| 901 es->argparens++; | |
| 902 break; | |
| 903 case ES_HAVEARG: | |
| 904 expand_appendarg(es, buf, len); | |
| 905 es->argparens++; | |
| 906 break; | |
| 907 } | |
| 908 } | |
| 909 | |
| 910 static | |
| 911 void | |
| 912 expand_got_rparen(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 913 { | |
| 914 switch (es->state) { | |
| 915 case ES_NORMAL: | |
| 21 | 916 expand_send(es, p, buf, len); |
| 19 | 917 break; |
| 918 case ES_WANTLPAREN: | |
| 919 if (es->curmacro) { | |
| 920 complain(p, "Expected arguments for macro %s", | |
| 921 es->curmacro->name); | |
| 922 } else { | |
| 923 complain(p, "Expected arguments for defined()"); | |
| 924 } | |
| 925 complain_fail(); | |
| 926 break; | |
| 927 case ES_NOARG: | |
| 928 assert(es->argparens == 0); | |
| 929 es->state = ES_NORMAL; | |
| 930 expand_domacro(es, p); | |
| 931 break; | |
| 932 case ES_HAVEARG: | |
| 933 if (es->argparens > 0) { | |
| 934 es->argparens--; | |
| 935 expand_appendarg(es, buf, len); | |
| 936 } else { | |
| 937 es->state = ES_NORMAL; | |
| 938 expand_domacro(es, p); | |
| 939 } | |
| 940 break; | |
| 941 } | |
| 942 } | |
| 943 | |
| 944 static | |
| 945 void | |
| 946 expand_got_comma(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 947 { | |
| 948 switch (es->state) { | |
| 949 case ES_NORMAL: | |
| 21 | 950 expand_send(es, p, buf, len); |
| 19 | 951 break; |
| 952 case ES_WANTLPAREN: | |
| 953 if (es->curmacro) { | |
| 954 complain(p, "Expected arguments for macro %s", | |
| 955 es->curmacro->name); | |
| 956 } else { | |
| 957 complain(p, "Expected arguments for defined()"); | |
| 958 } | |
| 959 complain_fail(); | |
| 960 break; | |
| 961 case ES_NOARG: | |
| 962 assert(es->argparens == 0); | |
| 963 expand_newarg(es, buf, 0); | |
| 964 break; | |
| 965 case ES_HAVEARG: | |
| 966 if (es->argparens > 0) { | |
| 967 expand_appendarg(es, buf, len); | |
| 968 } else { | |
| 969 es->state = ES_NOARG; | |
| 970 } | |
| 971 break; | |
| 972 } | |
| 973 } | |
| 974 | |
| 975 static | |
| 976 void | |
| 977 expand_got_other(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 978 { | |
| 979 switch (es->state) { | |
| 980 case ES_NORMAL: | |
| 21 | 981 expand_send(es, p, buf, len); |
| 19 | 982 break; |
| 983 case ES_WANTLPAREN: | |
| 984 if (es->curmacro) { | |
| 985 complain(p, "Expected arguments for macro %s", | |
| 986 es->curmacro->name); | |
| 987 } else { | |
| 988 complain(p, "Expected arguments for defined()"); | |
| 989 } | |
| 990 complain_fail(); | |
| 991 break; | |
| 992 case ES_NOARG: | |
| 993 expand_newarg(es, buf, len); | |
| 994 es->state = ES_HAVEARG; | |
| 995 break; | |
| 996 case ES_HAVEARG: | |
| 997 expand_appendarg(es, buf, len); | |
| 998 break; | |
| 999 } | |
| 1000 } | |
| 1001 | |
| 1002 static | |
| 1003 void | |
| 1004 expand_got_eof(struct expstate *es, struct place *p) | |
| 1005 { | |
| 1006 switch (es->state) { | |
| 1007 case ES_NORMAL: | |
| 21 | 1008 expand_send_eof(es, p); |
| 19 | 1009 break; |
| 1010 case ES_WANTLPAREN: | |
| 1011 if (es->curmacro) { | |
| 1012 complain(p, "Expected arguments for macro %s", | |
| 1013 es->curmacro->name); | |
| 1014 } else { | |
| 1015 complain(p, "Expected arguments for defined()"); | |
| 1016 } | |
| 1017 complain_fail(); | |
| 1018 break; | |
| 1019 case ES_NOARG: | |
| 1020 case ES_HAVEARG: | |
| 1021 if (es->curmacro) { | |
| 1022 complain(p, "Unclosed argument list for macro %s", | |
| 1023 es->curmacro->name); | |
| 1024 } else { | |
| 1025 complain(p, "Unclosed argument list for defined()"); | |
| 1026 } | |
| 1027 complain_fail(); | |
| 1028 expstate_destroyargs(es); | |
| 1029 break; | |
| 1030 } | |
| 1031 es->state = ES_NORMAL; | |
| 1032 es->curmacro = NULL; | |
| 1033 es->argparens = 0; | |
| 1034 } | |
| 1035 | |
| 1036 static | |
| 1037 void | |
| 1038 doexpand(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 1039 { | |
| 1040 size_t x; | |
| 1041 | |
| 1042 while (len > 0) { | |
| 1043 x = strspn(buf, ws); | |
| 28 | 1044 if (x > len) { |
| 1045 /* XXX gross, need strnspn */ | |
| 1046 x = len; | |
| 1047 } | |
| 1048 | |
| 19 | 1049 if (x > 0) { |
| 1050 expand_got_ws(es, p, buf, x); | |
| 1051 buf += x; | |
| 1052 len -= x; | |
| 28 | 1053 continue; |
| 19 | 1054 } |
| 1055 | |
| 1056 x = strspn(buf, alnum); | |
| 28 | 1057 if (x > len) { |
| 1058 /* XXX gross, need strnspn */ | |
| 1059 x = len; | |
| 1060 } | |
| 1061 | |
| 19 | 1062 if (x > 0) { |
| 1063 expand_got_word(es, p, buf, x); | |
| 1064 buf += x; | |
| 1065 len -= x; | |
| 1066 continue; | |
| 1067 } | |
| 1068 | |
| 1069 if (buf[0] == '(') { | |
| 1070 expand_got_lparen(es, p, buf, 1); | |
| 1071 buf++; | |
| 1072 len--; | |
| 1073 continue; | |
| 1074 } | |
| 1075 | |
| 1076 if (buf[0] == ')') { | |
| 1077 expand_got_rparen(es, p, buf, 1); | |
| 1078 buf++; | |
| 1079 len--; | |
| 1080 continue; | |
| 1081 } | |
| 1082 | |
| 1083 if (buf[0] == ',') { | |
| 1084 expand_got_comma(es, p, buf, 1); | |
| 1085 buf++; | |
| 1086 len--; | |
| 1087 continue; | |
| 1088 } | |
| 1089 | |
| 1090 expand_got_other(es, p, buf, 1); | |
| 1091 buf++; | |
| 1092 len--; | |
| 1093 } | |
| 1094 } | |
| 1095 | |
| 1096 char * | |
| 1097 macroexpand(struct place *p, char *buf, size_t len, bool honordefined) | |
| 1098 { | |
| 1099 struct expstate es; | |
| 1100 char *ret; | |
| 1101 | |
| 1102 expstate_init(&es, true, honordefined); | |
| 1103 doexpand(&es, p, buf, len); | |
| 1104 expand_got_eof(&es, p); | |
| 40 | 1105 |
| 1106 /* trim to fit, so the malloc debugging won't complain */ | |
| 1107 es.buf = dorealloc(es.buf, es.bufmax, strlen(es.buf) + 1); | |
| 1108 | |
| 19 | 1109 ret = es.buf; |
| 1110 es.buf = NULL; | |
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1111 es.bufpos = es.bufmax = 0; |
| 40 | 1112 |
| 19 | 1113 expstate_cleanup(&es); |
| 1114 | |
| 1115 return ret; | |
| 1116 } | |
| 1117 | |
| 1118 void | |
| 1119 macro_sendline(struct place *p, char *buf, size_t len) | |
| 1120 { | |
| 1121 doexpand(&mainstate, p, buf, len); | |
| 21 | 1122 output(p, "\n", 1); |
| 19 | 1123 } |
| 1124 | |
| 1125 void | |
| 1126 macro_sendeof(struct place *p) | |
| 1127 { | |
| 1128 expand_got_eof(&mainstate, p); | |
| 1129 } | |
| 17 | 1130 |
| 1131 //////////////////////////////////////////////////////////// | |
| 1132 // module initialization | |
| 1133 | |
| 1134 void | |
| 1135 macros_init(void) | |
| 1136 { | |
| 1137 macrotable_init(); | |
| 19 | 1138 expstate_init(&mainstate, false, false); |
| 17 | 1139 } |
| 1140 | |
| 1141 void | |
| 1142 macros_cleanup(void) | |
| 1143 { | |
| 19 | 1144 expstate_cleanup(&mainstate); |
| 17 | 1145 macrotable_cleanup(); |
| 1146 } |