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annotate macro.c @ 146:15f51ed08ecf
Add more tests for some degenerate cases we don't handle right.
| author | David A. Holland |
|---|---|
| date | Sat, 13 Jul 2013 14:47:29 -0400 |
| parents | a403605d3166 |
| children | e787bd67bf88 19278e2f885d |
| rev | line source |
|---|---|
| 30 | 1 /*- |
|
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add 2013 to copyrights where it seems warranted
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2 * Copyright (c) 2010, 2013 The NetBSD Foundation, Inc. |
| 30 | 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 }; | |
| 107 | 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 }; |
| 107 | 60 DECLARRAY(macro, static UNUSED); |
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61 DEFARRAY(macro, static); |
| 107 | 62 DECLARRAY(macroarray, static UNUSED); |
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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); | |
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165 dostrfree(m->name); |
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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; | |
| 74 | 358 tossbit = newmask & ~hashmask; |
| 17 | 359 hashmask = newmask; |
| 360 | |
| 361 for (i=0; i<numbuckets; i++) { | |
| 362 newbucket = NULL; | |
| 363 oldbucket = macroarrayarray_get(¯os, i); | |
| 74 | 364 if (oldbucket == NULL) { |
| 365 macroarrayarray_set(¯os, numbuckets + i, NULL); | |
| 366 continue; | |
| 367 } | |
| 17 | 368 oldnum = macroarray_num(oldbucket); |
| 369 for (j=0; j<oldnum; j++) { | |
| 370 m = macroarray_get(oldbucket, j); | |
| 371 if (m->hash & tossbit) { | |
| 372 if (newbucket == NULL) { | |
| 373 newbucket = macroarray_create(); | |
| 374 } | |
| 375 macroarray_set(oldbucket, j, NULL); | |
| 376 macroarray_add(newbucket, m, NULL); | |
| 377 } | |
| 378 } | |
| 379 for (j=k=0; j<oldnum; j++) { | |
| 380 m = macroarray_get(oldbucket, j); | |
| 74 | 381 if (m != NULL) { |
| 382 if (k < j) { | |
| 383 macroarray_set(oldbucket, k, m); | |
| 384 } | |
| 385 k++; | |
| 17 | 386 } |
| 387 } | |
| 388 macroarray_setsize(oldbucket, k); | |
| 389 macroarrayarray_set(¯os, numbuckets + i, newbucket); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 static | |
| 394 void | |
| 395 macrotable_add(struct macro *m) | |
| 396 { | |
| 397 unsigned hash; | |
| 398 struct macroarray *bucket; | |
| 399 unsigned numbuckets; | |
| 400 | |
| 401 numbuckets = macroarrayarray_num(¯os); | |
| 402 if (total_macros > 0 && total_macros / numbuckets > 9) { | |
| 403 macrotable_rehash(); | |
| 404 } | |
| 405 | |
| 19 | 406 hash = hashfunc(m->name, strlen(m->name)); |
| 17 | 407 bucket = macroarrayarray_get(¯os, hash & hashmask); |
| 408 if (bucket == NULL) { | |
| 409 bucket = macroarray_create(); | |
| 410 macroarrayarray_set(¯os, hash & hashmask, bucket); | |
| 411 } | |
| 412 macroarray_add(bucket, m, NULL); | |
| 413 total_macros++; | |
| 414 } | |
| 415 | |
| 416 //////////////////////////////////////////////////////////// | |
| 417 // external macro definition interface | |
| 418 | |
| 18 | 419 static |
| 420 struct macro * | |
| 421 macro_define_common_start(struct place *p1, const char *macro, | |
| 19 | 422 struct place *p2) |
| 17 | 423 { |
| 424 struct macro *m; | |
| 19 | 425 unsigned hash; |
| 17 | 426 |
| 18 | 427 if (!is_identifier(macro)) { |
| 428 complain(p1, "Invalid macro name %s", macro); | |
| 429 complain_fail(); | |
| 430 } | |
| 431 | |
| 19 | 432 hash = hashfunc(macro, strlen(macro)); |
| 433 m = macro_create(p1, macro, hash, p2); | |
| 18 | 434 return m; |
| 435 } | |
| 436 | |
| 437 static | |
| 438 void | |
| 439 macro_define_common_end(struct macro *m) | |
| 440 { | |
| 441 struct macro *oldm; | |
| 442 bool ok; | |
| 443 | |
| 444 oldm = macrotable_find(m->name, false); | |
| 445 if (oldm != NULL) { | |
| 446 ok = macro_eq(m, oldm); | |
| 447 if (ok) { | |
|
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448 /* in traditional cpp this is silent */ |
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449 //complain(&m->defplace, |
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450 // "Warning: redefinition of %s", m->name); |
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451 //complain(&oldm->defplace, |
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452 // "Previous definition was here"); |
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453 //if (mode.werror) { |
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454 // complain_fail(); |
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455 //} |
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456 } else { |
| 18 | 457 complain(&m->defplace, |
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parents:
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458 "Warning: non-identical redefinition of %s", |
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parents:
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459 m->name); |
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Complain only about non-identical redefinitions of macros.
David A. Holland
parents:
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460 complain(&oldm->defplace, |
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Complain only about non-identical redefinitions of macros.
David A. Holland
parents:
74
diff
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461 "Previous definition was here"); |
|
7e4723d34248
Complain only about non-identical redefinitions of macros.
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parents:
74
diff
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462 /* in traditional cpp this is not fatal */ |
| 17 | 463 if (mode.werror) { |
| 464 complain_fail(); | |
| 465 } | |
| 466 } | |
| 18 | 467 macro_destroy(m); |
| 17 | 468 return; |
| 469 } | |
| 18 | 470 macrotable_add(m); |
| 471 } | |
| 17 | 472 |
| 18 | 473 static |
| 474 void | |
| 475 macro_parse_parameters(struct macro *m, struct place *p, const char *params) | |
| 476 { | |
| 477 size_t len; | |
| 478 const char *s; | |
| 479 char *param; | |
| 480 | |
| 481 while (params != NULL) { | |
| 482 len = strspn(params, ws); | |
| 483 params += len; | |
| 484 p->column += len; | |
| 485 s = strchr(params, ','); | |
| 486 if (s) { | |
| 487 len = s-params; | |
| 488 param = dostrndup(params, len); | |
| 489 s++; | |
| 490 } else { | |
| 491 len = strlen(params); | |
| 492 param = dostrndup(params, len); | |
| 493 } | |
| 494 notrailingws(param, strlen(param)); | |
| 495 if (!is_identifier(param)) { | |
| 496 complain(p, "Invalid macro parameter name %s", param); | |
| 497 complain_fail(); | |
| 498 } else { | |
| 499 stringarray_add(&m->params, param, NULL); | |
| 500 } | |
| 501 params = s; | |
| 502 p->column += len; | |
| 503 } | |
| 504 } | |
| 505 | |
| 19 | 506 static |
| 507 bool | |
| 508 isparam(struct macro *m, const char *name, size_t len, unsigned *num_ret) | |
| 509 { | |
| 510 unsigned num, i; | |
| 511 const char *param; | |
| 512 | |
| 513 num = stringarray_num(&m->params); | |
| 514 for (i=0; i<num; i++) { | |
| 515 param = stringarray_get(&m->params, i); | |
| 27 | 516 if (strlen(param) == len && !memcmp(name, param, len)) { |
| 19 | 517 *num_ret = i; |
| 518 return true; | |
| 519 } | |
| 520 } | |
| 521 return false; | |
| 522 } | |
| 523 | |
| 524 static | |
| 525 void | |
| 526 macro_parse_expansion(struct macro *m, const char *buf) | |
| 527 { | |
| 528 size_t blockstart, wordstart, pos; | |
| 529 struct expansionitem *ei; | |
| 530 unsigned param; | |
| 531 | |
| 532 pos = blockstart = 0; | |
| 533 while (buf[pos] != '\0') { | |
| 534 pos += strspn(buf+pos, ws); | |
| 535 if (strchr(alnum, buf[pos])) { | |
| 536 wordstart = pos; | |
| 537 pos += strspn(buf+pos, alnum); | |
| 538 if (isparam(m, buf+wordstart, pos-wordstart, ¶m)) { | |
| 144 | 539 if (wordstart > blockstart) { |
| 19 | 540 ei = expansionitem_create_stringlen( |
| 541 buf + blockstart, | |
| 27 | 542 wordstart - blockstart); |
| 19 | 543 expansionitemarray_add(&m->expansion, |
| 544 ei, NULL); | |
| 545 } | |
| 546 ei = expansionitem_create_param(param); | |
| 547 expansionitemarray_add(&m->expansion, ei,NULL); | |
| 548 blockstart = pos; | |
| 549 continue; | |
| 550 } | |
| 551 continue; | |
| 552 } | |
| 553 pos++; | |
| 554 } | |
| 555 if (pos > blockstart) { | |
| 556 ei = expansionitem_create_stringlen(buf + blockstart, | |
| 25 | 557 pos - blockstart); |
| 19 | 558 expansionitemarray_add(&m->expansion, ei, NULL); |
| 559 } | |
| 560 } | |
| 561 | |
| 18 | 562 void |
| 563 macro_define_plain(struct place *p1, const char *macro, | |
| 564 struct place *p2, const char *expansion) | |
| 565 { | |
| 566 struct macro *m; | |
| 19 | 567 struct expansionitem *ei; |
| 18 | 568 |
| 19 | 569 m = macro_define_common_start(p1, macro, p2); |
| 570 ei = expansionitem_create_string(expansion); | |
| 571 expansionitemarray_add(&m->expansion, ei, NULL); | |
| 18 | 572 macro_define_common_end(m); |
| 573 } | |
| 574 | |
| 575 void | |
| 576 macro_define_params(struct place *p1, const char *macro, | |
| 577 struct place *p2, const char *params, | |
| 578 struct place *p3, const char *expansion) | |
| 579 { | |
| 580 struct macro *m; | |
| 581 | |
| 19 | 582 m = macro_define_common_start(p1, macro, p3); |
| 25 | 583 m->hasparams = true; |
| 18 | 584 macro_parse_parameters(m, p2, params); |
| 19 | 585 macro_parse_expansion(m, expansion); |
| 18 | 586 macro_define_common_end(m); |
| 17 | 587 } |
| 588 | |
| 589 void | |
| 590 macro_undef(const char *macro) | |
| 591 { | |
| 592 struct macro *m; | |
| 593 | |
| 594 m = macrotable_find(macro, true); | |
| 595 if (m) { | |
| 596 macro_destroy(m); | |
| 597 } | |
| 598 } | |
| 599 | |
| 600 bool | |
| 601 macro_isdefined(const char *macro) | |
| 602 { | |
| 603 struct macro *m; | |
| 604 | |
| 605 m = macrotable_find(macro, false); | |
| 606 return m != NULL; | |
| 607 } | |
| 608 | |
| 609 //////////////////////////////////////////////////////////// | |
| 610 // macro expansion | |
| 611 | |
| 19 | 612 struct expstate { |
| 613 bool honordefined; | |
| 614 enum { ES_NORMAL, ES_WANTLPAREN, ES_NOARG, ES_HAVEARG } state; | |
| 615 struct macro *curmacro; | |
| 616 struct stringarray args; | |
| 617 unsigned argparens; | |
| 618 | |
| 619 bool tobuf; | |
| 620 char *buf; | |
| 621 size_t bufpos, bufmax; | |
| 622 }; | |
| 623 | |
| 624 static struct expstate mainstate; | |
| 625 | |
| 626 static void doexpand(struct expstate *es, struct place *p, | |
| 627 char *buf, size_t len); | |
| 628 | |
| 629 static | |
| 630 void | |
| 631 expstate_init(struct expstate *es, bool tobuf, bool honordefined) | |
| 632 { | |
| 633 es->honordefined = honordefined; | |
| 634 es->state = ES_NORMAL; | |
| 635 es->curmacro = NULL; | |
| 636 stringarray_init(&es->args); | |
| 637 es->argparens = 0; | |
| 638 es->tobuf = tobuf; | |
| 639 es->buf = NULL; | |
| 640 es->bufpos = 0; | |
| 641 es->bufmax = 0; | |
| 642 } | |
| 643 | |
| 644 static | |
| 645 void | |
| 646 expstate_cleanup(struct expstate *es) | |
| 647 { | |
| 648 assert(es->state == ES_NORMAL); | |
| 649 stringarray_cleanup(&es->args); | |
| 650 if (es->buf) { | |
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651 dofree(es->buf, es->bufmax); |
| 19 | 652 } |
| 653 } | |
| 654 | |
| 655 static | |
| 656 void | |
| 657 expstate_destroyargs(struct expstate *es) | |
| 658 { | |
| 659 unsigned i, num; | |
| 660 | |
| 661 num = stringarray_num(&es->args); | |
| 662 for (i=0; i<num; i++) { | |
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663 dostrfree(stringarray_get(&es->args, i)); |
| 19 | 664 } |
| 665 stringarray_setsize(&es->args, 0); | |
| 666 } | |
| 667 | |
| 668 static | |
| 669 void | |
| 21 | 670 expand_send(struct expstate *es, struct place *p, const char *buf, size_t len) |
| 19 | 671 { |
|
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672 size_t oldmax; |
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673 |
| 19 | 674 if (es->tobuf) { |
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675 assert(es->bufpos <= es->bufmax); |
| 19 | 676 if (es->bufpos + len > es->bufmax) { |
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677 oldmax = es->bufmax; |
| 19 | 678 if (es->bufmax == 0) { |
| 679 es->bufmax = 64; | |
| 680 } | |
| 681 while (es->bufpos + len > es->bufmax) { | |
| 682 es->bufmax *= 2; | |
| 683 } | |
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684 es->buf = dorealloc(es->buf, oldmax, es->bufmax); |
| 19 | 685 } |
| 686 memcpy(es->buf + es->bufpos, buf, len); | |
| 687 es->bufpos += len; | |
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688 assert(es->bufpos <= es->bufmax); |
| 19 | 689 } else { |
| 21 | 690 output(p, buf, len); |
| 19 | 691 } |
| 692 } | |
| 693 | |
| 694 static | |
| 695 void | |
| 21 | 696 expand_send_eof(struct expstate *es, struct place *p) |
| 19 | 697 { |
| 698 if (es->tobuf) { | |
| 21 | 699 expand_send(es, p, "", 1); |
| 19 | 700 es->bufpos--; |
| 701 } else { | |
| 702 output_eof(); | |
| 703 } | |
| 704 } | |
| 705 | |
| 706 static | |
| 707 void | |
| 708 expand_newarg(struct expstate *es, char *buf, size_t len) | |
| 709 { | |
| 710 char *text; | |
| 711 | |
| 712 text = dostrndup(buf, len); | |
| 713 stringarray_add(&es->args, text, NULL); | |
| 714 } | |
| 715 | |
| 716 static | |
| 717 void | |
| 718 expand_appendarg(struct expstate *es, char *buf, size_t len) | |
| 719 { | |
| 720 unsigned num; | |
| 721 char *text; | |
| 722 size_t oldlen; | |
| 723 | |
| 724 num = stringarray_num(&es->args); | |
| 725 assert(num > 0); | |
| 726 | |
| 727 text = stringarray_get(&es->args, num - 1); | |
| 728 oldlen = strlen(text); | |
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729 text = dorealloc(text, oldlen + 1, oldlen + len + 1); |
| 19 | 730 memcpy(text + oldlen, buf, len); |
| 731 text[oldlen+len] = '\0'; | |
| 732 stringarray_set(&es->args, num - 1, text); | |
| 733 } | |
| 734 | |
| 735 static | |
| 736 char * | |
| 28 | 737 expand_substitute(struct place *p, struct expstate *es) |
| 19 | 738 { |
| 739 struct expansionitem *ei; | |
| 740 unsigned i, num; | |
| 741 size_t len; | |
| 742 char *arg; | |
| 743 char *ret; | |
| 28 | 744 unsigned numargs, numparams; |
| 745 | |
| 746 numargs = stringarray_num(&es->args); | |
| 747 numparams = stringarray_num(&es->curmacro->params); | |
| 748 | |
| 749 if (numargs == 0 && numparams == 1) { | |
| 750 /* no arguments <=> one empty argument */ | |
| 751 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 752 numargs++; | |
| 753 } | |
| 754 if (numargs != numparams) { | |
| 755 complain(p, "Wrong number of arguments for macro %s; " | |
| 756 "found %u, expected %u", | |
| 757 es->curmacro->name, numargs, numparams); | |
| 758 complain_fail(); | |
| 759 while (numargs < numparams) { | |
| 760 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 761 numargs++; | |
| 762 } | |
| 763 } | |
| 19 | 764 |
| 765 len = 0; | |
| 766 num = expansionitemarray_num(&es->curmacro->expansion); | |
| 767 for (i=0; i<num; i++) { | |
| 768 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
| 769 if (ei->isstring) { | |
| 770 len += strlen(ei->string); | |
| 771 } else { | |
| 772 arg = stringarray_get(&es->args, ei->param); | |
| 773 len += strlen(arg); | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 ret = domalloc(len+1); | |
| 778 *ret = '\0'; | |
| 779 for (i=0; i<num; i++) { | |
| 780 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
| 781 if (ei->isstring) { | |
| 782 strcat(ret, ei->string); | |
| 783 } else { | |
| 784 arg = stringarray_get(&es->args, ei->param); | |
| 785 strcat(ret, arg); | |
| 786 } | |
| 787 } | |
| 788 | |
| 789 return ret; | |
| 790 } | |
| 791 | |
| 792 static | |
| 793 void | |
| 794 expand_domacro(struct expstate *es, struct place *p) | |
| 795 { | |
| 796 struct macro *m; | |
| 797 char *newbuf, *newbuf2; | |
| 798 | |
| 799 if (es->curmacro == NULL) { | |
| 800 /* defined() */ | |
| 801 if (stringarray_num(&es->args) != 1) { | |
| 802 complain(p, "Too many arguments for defined()"); | |
| 803 complain_fail(); | |
| 21 | 804 expand_send(es, p, "0", 1); |
| 19 | 805 return; |
| 806 } | |
| 807 m = macrotable_find(stringarray_get(&es->args, 0), false); | |
| 21 | 808 expand_send(es, p, (m != NULL) ? "1" : "0", 1); |
| 25 | 809 expstate_destroyargs(es); |
| 19 | 810 return; |
| 811 } | |
| 812 | |
| 813 assert(es->curmacro->inuse == false); | |
| 814 es->curmacro->inuse = true; | |
| 815 | |
| 28 | 816 newbuf = expand_substitute(p, es); |
| 19 | 817 newbuf2 = macroexpand(p, newbuf, strlen(newbuf), false); |
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818 dostrfree(newbuf); |
| 25 | 819 expstate_destroyargs(es); |
| 19 | 820 doexpand(es, p, newbuf2, strlen(newbuf2)); |
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821 dostrfree(newbuf2); |
| 19 | 822 |
| 823 es->curmacro->inuse = false; | |
| 824 } | |
| 825 | |
|
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826 /* |
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827 * The traditional behavior if a function-like macro appears without |
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828 * arguments is to pretend it isn't a macro; that is, just emit its |
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829 * name. |
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830 */ |
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831 static |
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832 void |
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833 expand_missingargs(struct expstate *es, struct place *p, bool needspace) |
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834 { |
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835 if (es->curmacro == NULL) { |
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836 /* defined */ |
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837 expand_send(es, p, "defined", 7); |
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838 return; |
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839 } |
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840 expand_send(es, p, es->curmacro->name, strlen(es->curmacro->name)); |
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841 /* send a space in case we ate whitespace after the macro name */ |
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842 if (needspace) { |
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843 expand_send(es, p, " ", 1); |
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844 } |
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845 } |
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846 |
| 19 | 847 static |
| 848 void | |
| 849 expand_got_ws(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 850 { | |
| 851 switch (es->state) { | |
| 852 case ES_NORMAL: | |
| 21 | 853 expand_send(es, p, buf, len); |
| 19 | 854 break; |
| 855 case ES_WANTLPAREN: | |
| 856 break; | |
| 857 case ES_NOARG: | |
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858 expand_newarg(es, buf, len); |
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859 es->state = ES_HAVEARG; |
| 19 | 860 break; |
| 861 case ES_HAVEARG: | |
| 862 expand_appendarg(es, buf, len); | |
| 863 break; | |
| 864 } | |
| 865 } | |
| 866 | |
| 867 static | |
| 868 void | |
| 869 expand_got_word(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 870 { | |
| 871 struct macro *m; | |
| 872 struct expansionitem *ei; | |
| 873 char *newbuf; | |
| 17 | 874 |
| 19 | 875 switch (es->state) { |
| 876 case ES_NORMAL: | |
| 877 if (es->honordefined && | |
| 878 len == 7 && !memcmp(buf, "defined", 7)) { | |
| 879 es->curmacro = NULL; | |
| 880 es->state = ES_WANTLPAREN; | |
| 881 break; | |
| 882 } | |
| 883 m = macrotable_findlen(buf, len, false); | |
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884 if (m == NULL || m->inuse) { |
| 21 | 885 expand_send(es, p, buf, len); |
| 19 | 886 } else if (!m->hasparams) { |
| 887 m->inuse = true; | |
| 888 assert(expansionitemarray_num(&m->expansion) == 1); | |
| 889 ei = expansionitemarray_get(&m->expansion, 0); | |
| 890 assert(ei->isstring); | |
| 891 newbuf = macroexpand(p, ei->string, | |
| 892 strlen(ei->string), false); | |
| 893 doexpand(es, p, newbuf, strlen(newbuf)); | |
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894 dostrfree(newbuf); |
| 19 | 895 m->inuse = false; |
| 896 } else { | |
| 897 es->curmacro = m; | |
| 898 es->state = ES_WANTLPAREN; | |
| 899 } | |
| 900 break; | |
| 901 case ES_WANTLPAREN: | |
| 902 if (es->curmacro != NULL) { | |
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903 expand_missingargs(es, p, true); |
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904 es->state = ES_NORMAL; |
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905 /* try again */ |
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906 expand_got_word(es, p, buf, len); |
| 19 | 907 } else { |
| 908 /* "defined foo" means "defined(foo)" */ | |
| 909 expand_newarg(es, buf, len); | |
| 910 es->state = ES_NORMAL; | |
| 911 expand_domacro(es, p); | |
| 912 } | |
| 913 break; | |
| 914 case ES_NOARG: | |
| 915 expand_newarg(es, buf, len); | |
| 916 es->state = ES_HAVEARG; | |
| 917 break; | |
| 918 case ES_HAVEARG: | |
| 919 expand_appendarg(es, buf, len); | |
| 920 break; | |
| 921 } | |
| 922 } | |
| 923 | |
| 924 static | |
| 925 void | |
| 926 expand_got_lparen(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 927 { | |
| 928 switch (es->state) { | |
| 929 case ES_NORMAL: | |
| 21 | 930 expand_send(es, p, buf, len); |
| 19 | 931 break; |
| 932 case ES_WANTLPAREN: | |
| 933 es->state = ES_NOARG; | |
| 934 break; | |
| 935 case ES_NOARG: | |
| 936 expand_newarg(es, buf, len); | |
| 937 es->state = ES_HAVEARG; | |
| 938 es->argparens++; | |
| 939 break; | |
| 940 case ES_HAVEARG: | |
| 941 expand_appendarg(es, buf, len); | |
| 942 es->argparens++; | |
| 943 break; | |
| 944 } | |
| 945 } | |
| 946 | |
| 947 static | |
| 948 void | |
| 949 expand_got_rparen(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 950 { | |
| 951 switch (es->state) { | |
| 952 case ES_NORMAL: | |
| 21 | 953 expand_send(es, p, buf, len); |
| 19 | 954 break; |
| 955 case ES_WANTLPAREN: | |
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956 expand_missingargs(es, p, false); |
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957 es->state = ES_NORMAL; |
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958 /* try again */ |
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959 expand_got_rparen(es, p, buf, len); |
| 19 | 960 break; |
| 961 case ES_NOARG: | |
| 962 assert(es->argparens == 0); | |
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963 if (stringarray_num(&es->args) > 0) { |
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964 /* we are after a comma; enter an empty argument */ |
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965 expand_newarg(es, buf, 0); |
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966 } |
| 19 | 967 es->state = ES_NORMAL; |
| 968 expand_domacro(es, p); | |
| 969 break; | |
| 970 case ES_HAVEARG: | |
| 971 if (es->argparens > 0) { | |
| 972 es->argparens--; | |
| 973 expand_appendarg(es, buf, len); | |
| 974 } else { | |
| 975 es->state = ES_NORMAL; | |
| 976 expand_domacro(es, p); | |
| 977 } | |
| 978 break; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 static | |
| 983 void | |
| 984 expand_got_comma(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 985 { | |
| 986 switch (es->state) { | |
| 987 case ES_NORMAL: | |
| 21 | 988 expand_send(es, p, buf, len); |
| 19 | 989 break; |
| 990 case ES_WANTLPAREN: | |
|
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991 expand_missingargs(es, p, false); |
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992 es->state = ES_NORMAL; |
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993 /* try again */ |
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994 expand_got_comma(es, p, buf, len); |
| 19 | 995 break; |
| 996 case ES_NOARG: | |
| 997 assert(es->argparens == 0); | |
| 998 expand_newarg(es, buf, 0); | |
| 999 break; | |
| 1000 case ES_HAVEARG: | |
| 1001 if (es->argparens > 0) { | |
| 1002 expand_appendarg(es, buf, len); | |
| 1003 } else { | |
| 1004 es->state = ES_NOARG; | |
| 1005 } | |
| 1006 break; | |
| 1007 } | |
| 1008 } | |
| 1009 | |
| 1010 static | |
| 1011 void | |
| 1012 expand_got_other(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 1013 { | |
| 1014 switch (es->state) { | |
| 1015 case ES_NORMAL: | |
| 21 | 1016 expand_send(es, p, buf, len); |
| 19 | 1017 break; |
| 1018 case ES_WANTLPAREN: | |
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1019 expand_missingargs(es, p, false); |
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1020 es->state = ES_NORMAL; |
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1021 /* try again */ |
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1022 expand_got_other(es, p, buf, len); |
| 19 | 1023 break; |
| 1024 case ES_NOARG: | |
| 1025 expand_newarg(es, buf, len); | |
| 1026 es->state = ES_HAVEARG; | |
| 1027 break; | |
| 1028 case ES_HAVEARG: | |
| 1029 expand_appendarg(es, buf, len); | |
| 1030 break; | |
| 1031 } | |
| 1032 } | |
| 1033 | |
| 1034 static | |
| 1035 void | |
| 1036 expand_got_eof(struct expstate *es, struct place *p) | |
| 1037 { | |
| 1038 switch (es->state) { | |
| 1039 case ES_NORMAL: | |
| 1040 break; | |
| 1041 case ES_WANTLPAREN: | |
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1042 expand_missingargs(es, p, false); |
| 19 | 1043 break; |
| 1044 case ES_NOARG: | |
| 1045 case ES_HAVEARG: | |
| 1046 if (es->curmacro) { | |
| 1047 complain(p, "Unclosed argument list for macro %s", | |
| 1048 es->curmacro->name); | |
| 1049 } else { | |
| 1050 complain(p, "Unclosed argument list for defined()"); | |
| 1051 } | |
| 1052 complain_fail(); | |
| 1053 expstate_destroyargs(es); | |
| 1054 break; | |
| 1055 } | |
| 88 | 1056 expand_send_eof(es, p); |
| 19 | 1057 es->state = ES_NORMAL; |
| 1058 es->curmacro = NULL; | |
| 1059 es->argparens = 0; | |
| 1060 } | |
| 1061 | |
| 1062 static | |
| 1063 void | |
| 1064 doexpand(struct expstate *es, struct place *p, char *buf, size_t len) | |
| 1065 { | |
| 85 | 1066 char *s; |
| 19 | 1067 size_t x; |
| 85 | 1068 bool inquote = false; |
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1069 char quote = '\0'; |
| 19 | 1070 |
| 1071 while (len > 0) { | |
| 1072 x = strspn(buf, ws); | |
| 28 | 1073 if (x > len) { |
| 1074 /* XXX gross, need strnspn */ | |
| 1075 x = len; | |
| 1076 } | |
| 1077 | |
| 19 | 1078 if (x > 0) { |
| 1079 expand_got_ws(es, p, buf, x); | |
| 1080 buf += x; | |
| 1081 len -= x; | |
| 28 | 1082 continue; |
| 19 | 1083 } |
| 1084 | |
| 1085 x = strspn(buf, alnum); | |
| 28 | 1086 if (x > len) { |
| 1087 /* XXX gross, need strnspn */ | |
| 1088 x = len; | |
| 1089 } | |
| 1090 | |
| 145 | 1091 if (!inquote && x > 0) { |
| 19 | 1092 expand_got_word(es, p, buf, x); |
| 1093 buf += x; | |
| 1094 len -= x; | |
| 1095 continue; | |
| 1096 } | |
| 1097 | |
| 85 | 1098 if (!inquote && len > 1 && buf[0] == '/' && buf[1] == '*') { |
| 1099 s = strstr(buf, "*/"); | |
| 1100 if (s) { | |
| 1101 x = s - buf; | |
| 1102 } else { | |
| 1103 x = len; | |
| 1104 } | |
| 1105 expand_got_ws(es, p, buf, x); | |
| 1106 buf += x; | |
| 1107 len -= x; | |
| 1108 continue; | |
| 1109 } | |
| 1110 | |
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1111 if (!inquote && buf[0] == '(') { |
| 19 | 1112 expand_got_lparen(es, p, buf, 1); |
| 1113 buf++; | |
| 1114 len--; | |
| 1115 continue; | |
| 1116 } | |
| 1117 | |
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1118 if (!inquote && buf[0] == ')') { |
| 19 | 1119 expand_got_rparen(es, p, buf, 1); |
| 1120 buf++; | |
| 1121 len--; | |
| 1122 continue; | |
| 1123 } | |
| 1124 | |
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1125 if (!inquote && buf[0] == ',') { |
| 19 | 1126 expand_got_comma(es, p, buf, 1); |
| 1127 buf++; | |
| 1128 len--; | |
| 1129 continue; | |
| 1130 } | |
| 1131 | |
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1132 if (len > 1 && buf[0] == '\\' && |
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1133 (buf[1] == '"' || buf[1] == '\'')) { |
| 85 | 1134 expand_got_other(es, p, buf, 2); |
| 1135 buf += 2; | |
| 1136 len -= 2; | |
| 1137 continue; | |
| 1138 } | |
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1139 if (!inquote && (buf[0] == '"' || buf[0] == '\'')) { |
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1140 inquote = true; |
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1141 quote = buf[0]; |
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1142 } else if (inquote && buf[0] == quote) { |
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1143 inquote = false; |
| 85 | 1144 } |
| 1145 | |
| 19 | 1146 expand_got_other(es, p, buf, 1); |
| 1147 buf++; | |
| 1148 len--; | |
| 1149 } | |
| 1150 } | |
| 1151 | |
| 1152 char * | |
| 1153 macroexpand(struct place *p, char *buf, size_t len, bool honordefined) | |
| 1154 { | |
| 1155 struct expstate es; | |
| 1156 char *ret; | |
| 1157 | |
| 1158 expstate_init(&es, true, honordefined); | |
| 1159 doexpand(&es, p, buf, len); | |
| 1160 expand_got_eof(&es, p); | |
| 40 | 1161 |
| 1162 /* trim to fit, so the malloc debugging won't complain */ | |
| 1163 es.buf = dorealloc(es.buf, es.bufmax, strlen(es.buf) + 1); | |
| 1164 | |
| 19 | 1165 ret = es.buf; |
| 1166 es.buf = NULL; | |
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1167 es.bufpos = es.bufmax = 0; |
| 40 | 1168 |
| 19 | 1169 expstate_cleanup(&es); |
| 1170 | |
| 1171 return ret; | |
| 1172 } | |
| 1173 | |
| 1174 void | |
| 1175 macro_sendline(struct place *p, char *buf, size_t len) | |
| 1176 { | |
| 1177 doexpand(&mainstate, p, buf, len); | |
| 21 | 1178 output(p, "\n", 1); |
| 19 | 1179 } |
| 1180 | |
| 1181 void | |
| 1182 macro_sendeof(struct place *p) | |
| 1183 { | |
| 1184 expand_got_eof(&mainstate, p); | |
| 1185 } | |
| 17 | 1186 |
| 1187 //////////////////////////////////////////////////////////// | |
| 1188 // module initialization | |
| 1189 | |
| 1190 void | |
| 1191 macros_init(void) | |
| 1192 { | |
| 1193 macrotable_init(); | |
| 19 | 1194 expstate_init(&mainstate, false, false); |
| 17 | 1195 } |
| 1196 | |
| 1197 void | |
| 1198 macros_cleanup(void) | |
| 1199 { | |
| 19 | 1200 expstate_cleanup(&mainstate); |
| 17 | 1201 macrotable_cleanup(); |
| 1202 } |