Mercurial > ~dholland > hg > tradcpp > index.cgi
annotate macro.c @ 203:3a25180d3a5c
Abort on line numbering or column numbering overflow.
Line numbers are limited to values that fit in "unsigned int". Also
reject input lines longer than 2^32-1 characters. It seems reasonable
to presume that any input that violates these constraints is someone
screwing around and not a serious attempt to compile or preprocess
anything useful. Done in response to n2129, but without getting into
any of the silliness found there.
| author | David A. Holland |
|---|---|
| date | Tue, 01 Aug 2017 14:51:04 -0400 |
| parents | 1d2bad7151f9 |
| children |
| rev | line source |
|---|---|
| 30 | 1 /*- |
|
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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> |
|
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31 #include <stdio.h> |
| 17 | 32 #include <stdlib.h> |
| 33 #include <string.h> | |
| 34 | |
| 184 | 35 #include "union.h" |
| 17 | 36 #include "array.h" |
| 37 #include "mode.h" | |
| 38 #include "place.h" | |
| 39 #include "macro.h" | |
| 19 | 40 #include "output.h" |
| 41 | |
| 42 struct expansionitem { | |
|
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43 enum { EI_STRING, EI_PARAM, EI_FILE, EI_LINE } itemtype; |
| 19 | 44 union { |
| 184 | 45 char *ei_string; /* for EI_STRING */ |
| 46 unsigned ei_param; /* for EI_PARAM */ | |
| 47 } UN; | |
| 19 | 48 }; |
| 107 | 49 DECLARRAY(expansionitem, static UNUSED); |
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50 DEFARRAY(expansionitem, static); |
| 17 | 51 |
| 184 | 52 #ifdef NEED_UNION_ACCESSORS |
| 53 #define ei_string un.ei_string | |
| 54 #define ei_param un.ei_param | |
| 55 #endif | |
| 56 | |
| 57 | |
| 17 | 58 struct macro { |
| 59 struct place defplace; | |
| 60 struct place expansionplace; | |
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61 unsigned hash; |
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62 char *name; |
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63 bool hasparams; |
| 18 | 64 struct stringarray params; |
| 19 | 65 struct expansionitemarray expansion; |
| 66 bool inuse; | |
| 17 | 67 }; |
| 107 | 68 DECLARRAY(macro, static UNUSED); |
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69 DEFARRAY(macro, static); |
| 107 | 70 DECLARRAY(macroarray, static UNUSED); |
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71 DEFARRAY(macroarray, static); |
| 17 | 72 |
| 73 static struct macroarrayarray macros; | |
| 74 static unsigned total_macros; | |
| 75 static unsigned hashmask; | |
| 76 | |
| 77 //////////////////////////////////////////////////////////// | |
| 78 // macro structure ops | |
| 79 | |
| 80 static | |
| 19 | 81 struct expansionitem * |
| 82 expansionitem_create_string(const char *string) | |
| 83 { | |
| 84 struct expansionitem *ei; | |
| 85 | |
| 86 ei = domalloc(sizeof(*ei)); | |
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87 ei->itemtype = EI_STRING; |
| 184 | 88 ei->ei_string = dostrdup(string); |
| 19 | 89 return ei; |
| 90 } | |
| 91 | |
| 92 static | |
| 93 struct expansionitem * | |
| 94 expansionitem_create_stringlen(const char *string, size_t len) | |
| 95 { | |
| 96 struct expansionitem *ei; | |
| 97 | |
| 98 ei = domalloc(sizeof(*ei)); | |
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99 ei->itemtype = EI_STRING; |
| 184 | 100 ei->ei_string = dostrndup(string, len); |
| 19 | 101 return ei; |
| 102 } | |
| 103 | |
| 104 static | |
| 105 struct expansionitem * | |
| 106 expansionitem_create_param(unsigned param) | |
| 107 { | |
| 108 struct expansionitem *ei; | |
| 109 | |
| 110 ei = domalloc(sizeof(*ei)); | |
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111 ei->itemtype = EI_PARAM; |
| 184 | 112 ei->ei_param = param; |
| 19 | 113 return ei; |
| 114 } | |
| 115 | |
| 116 static | |
|
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117 struct expansionitem * |
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118 expansionitem_create_file(void) |
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119 { |
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120 struct expansionitem *ei; |
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121 |
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122 ei = domalloc(sizeof(*ei)); |
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123 ei->itemtype = EI_FILE; |
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124 return ei; |
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125 } |
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126 |
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127 static |
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128 struct expansionitem * |
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129 expansionitem_create_line(void) |
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130 { |
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131 struct expansionitem *ei; |
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132 |
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133 ei = domalloc(sizeof(*ei)); |
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134 ei->itemtype = EI_LINE; |
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135 return ei; |
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136 } |
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137 |
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138 static |
| 19 | 139 void |
| 140 expansionitem_destroy(struct expansionitem *ei) | |
| 141 { | |
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142 switch (ei->itemtype) { |
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143 case EI_STRING: |
| 184 | 144 dostrfree(ei->ei_string); |
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145 break; |
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146 case EI_PARAM: |
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147 case EI_FILE: |
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148 case EI_LINE: |
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149 break; |
| 19 | 150 } |
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151 dofree(ei, sizeof(*ei)); |
| 19 | 152 } |
| 153 | |
| 154 static | |
| 155 bool | |
| 156 expansionitem_eq(const struct expansionitem *ei1, | |
| 157 const struct expansionitem *ei2) | |
| 158 { | |
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159 if (ei1->itemtype != ei2->itemtype) { |
| 19 | 160 return false; |
| 161 } | |
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162 switch (ei1->itemtype) { |
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163 case EI_STRING: |
| 184 | 164 if (strcmp(ei1->ei_string, ei2->ei_string) != 0) { |
| 19 | 165 return false; |
| 166 } | |
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167 break; |
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168 case EI_PARAM: |
| 184 | 169 if (ei1->ei_param != ei2->ei_param) { |
| 19 | 170 return false; |
| 171 } | |
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172 break; |
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173 case EI_FILE: |
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174 case EI_LINE: |
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175 break; |
| 19 | 176 } |
| 177 return true; | |
| 178 } | |
| 179 | |
| 180 static | |
| 17 | 181 struct macro * |
| 18 | 182 macro_create(struct place *p1, const char *name, unsigned hash, |
| 19 | 183 struct place *p2) |
| 17 | 184 { |
| 185 struct macro *m; | |
| 186 | |
| 187 m = domalloc(sizeof(*m)); | |
| 188 m->defplace = *p1; | |
| 189 m->expansionplace = *p2; | |
| 190 m->hash = hash; | |
| 191 m->name = dostrdup(name); | |
| 18 | 192 m->hasparams = false; |
| 193 stringarray_init(&m->params); | |
| 19 | 194 expansionitemarray_init(&m->expansion); |
| 195 m->inuse = false; | |
| 17 | 196 return m; |
| 197 } | |
| 198 | |
| 19 | 199 DESTROYALL_ARRAY(expansionitem, ); |
| 200 | |
| 17 | 201 static |
| 202 void | |
| 203 macro_destroy(struct macro *m) | |
| 204 { | |
| 19 | 205 expansionitemarray_destroyall(&m->expansion); |
| 206 expansionitemarray_cleanup(&m->expansion); | |
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207 dostrfree(m->name); |
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208 dofree(m, sizeof(*m)); |
| 17 | 209 } |
| 210 | |
| 18 | 211 static |
| 212 bool | |
| 213 macro_eq(const struct macro *m1, const struct macro *m2) | |
| 214 { | |
| 215 unsigned num1, num2, i; | |
| 19 | 216 struct expansionitem *ei1, *ei2; |
| 18 | 217 const char *p1, *p2; |
| 218 | |
| 219 if (strcmp(m1->name, m2->name) != 0) { | |
| 220 return false; | |
| 221 } | |
| 222 | |
| 223 if (m1->hasparams != m2->hasparams) { | |
| 224 return false; | |
| 225 } | |
| 226 | |
| 19 | 227 num1 = expansionitemarray_num(&m1->expansion); |
| 228 num2 = expansionitemarray_num(&m2->expansion); | |
| 229 if (num1 != num2) { | |
| 18 | 230 return false; |
| 231 } | |
| 232 | |
| 19 | 233 for (i=0; i<num1; i++) { |
| 234 ei1 = expansionitemarray_get(&m1->expansion, i); | |
| 235 ei2 = expansionitemarray_get(&m2->expansion, i); | |
| 236 if (!expansionitem_eq(ei1, ei2)) { | |
| 237 return false; | |
| 238 } | |
| 239 } | |
| 240 | |
| 18 | 241 num1 = stringarray_num(&m1->params); |
| 242 num2 = stringarray_num(&m2->params); | |
| 243 if (num1 != num2) { | |
| 244 return false; | |
| 245 } | |
| 246 | |
| 247 for (i=0; i<num1; i++) { | |
| 248 p1 = stringarray_get(&m1->params, i); | |
| 249 p2 = stringarray_get(&m2->params, i); | |
| 250 if (strcmp(p1, p2) != 0) { | |
| 251 return false; | |
| 252 } | |
| 253 } | |
| 254 return true; | |
| 255 } | |
| 256 | |
| 17 | 257 //////////////////////////////////////////////////////////// |
| 258 // macro table | |
| 259 | |
| 260 /* | |
| 261 * Unless I've screwed up, this is something called Fletcher's Checksum | |
| 262 * that showed up in Dr. Dobbs in, according to my notes, May 1992. The | |
| 263 * implementation is new. | |
| 264 */ | |
| 265 static | |
| 266 unsigned | |
| 19 | 267 hashfunc(const char *s, size_t len) |
| 17 | 268 { |
| 269 uint16_t x1, x2, a; | |
| 19 | 270 size_t i; |
| 17 | 271 |
| 272 x1 = (uint16_t) (len >> 16); | |
| 273 x2 = (uint16_t) (len); | |
| 274 if (x1==0) { | |
| 275 x1++; | |
| 276 } | |
| 277 if (x2==0) { | |
| 278 x2++; | |
| 279 } | |
| 280 | |
| 281 for (i=0; i<len; i+=2) { | |
| 282 if (i==len-1) { | |
| 283 a = (unsigned char)s[i]; | |
| 284 /* don't run off the end of the array */ | |
| 285 } | |
| 286 else { | |
| 287 a = (unsigned char)s[i] + | |
| 288 ((uint16_t)(unsigned char)s[i+1] << 8); | |
| 289 } | |
| 290 x1 += a; | |
| 291 if (x1 < a) { | |
| 292 x1++; | |
| 293 } | |
| 294 x2 += x1; | |
| 295 if (x2 < x1) { | |
| 296 x2++; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 x1 ^= 0xffff; | |
| 301 x2 ^= 0xffff; | |
| 302 return ((uint32_t)x2)*65535U + x1; | |
| 303 } | |
| 304 | |
| 305 static | |
| 306 void | |
| 307 macrotable_init(void) | |
| 308 { | |
| 309 unsigned i; | |
| 310 | |
| 311 macroarrayarray_init(¯os); | |
| 312 macroarrayarray_setsize(¯os, 4); | |
| 313 for (i=0; i<4; i++) { | |
| 314 macroarrayarray_set(¯os, i, NULL); | |
| 315 } | |
| 316 total_macros = 0; | |
| 317 hashmask = 0x3; | |
| 318 } | |
| 319 | |
| 320 DESTROYALL_ARRAY(macro, ); | |
| 321 | |
| 322 static | |
| 323 void | |
| 324 macrotable_cleanup(void) | |
| 325 { | |
| 326 struct macroarray *bucket; | |
| 327 unsigned numbuckets, i; | |
| 328 | |
| 329 numbuckets = macroarrayarray_num(¯os); | |
| 330 for (i=0; i<numbuckets; i++) { | |
| 331 bucket = macroarrayarray_get(¯os, i); | |
| 28 | 332 if (bucket != NULL) { |
| 333 macroarray_destroyall(bucket); | |
| 334 macroarray_destroy(bucket); | |
| 335 } | |
| 17 | 336 } |
| 337 macroarrayarray_setsize(¯os, 0); | |
| 338 macroarrayarray_cleanup(¯os); | |
| 339 } | |
| 340 | |
| 341 static | |
| 342 struct macro * | |
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343 macrotable_findlen(const char *name, size_t len, bool remove_it) |
| 17 | 344 { |
| 345 unsigned hash; | |
| 346 struct macroarray *bucket; | |
| 347 struct macro *m, *m2; | |
| 348 unsigned i, num; | |
| 19 | 349 size_t mlen; |
| 17 | 350 |
| 19 | 351 hash = hashfunc(name, len); |
| 17 | 352 bucket = macroarrayarray_get(¯os, hash & hashmask); |
| 353 if (bucket == NULL) { | |
| 354 return NULL; | |
| 355 } | |
| 356 num = macroarray_num(bucket); | |
| 357 for (i=0; i<num; i++) { | |
| 358 m = macroarray_get(bucket, i); | |
| 359 if (hash != m->hash) { | |
| 360 continue; | |
| 361 } | |
| 19 | 362 mlen = strlen(m->name); |
| 363 if (len == mlen && !memcmp(name, m->name, len)) { | |
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364 if (remove_it) { |
| 17 | 365 if (i < num-1) { |
| 366 m2 = macroarray_get(bucket, num-1); | |
| 367 macroarray_set(bucket, i, m2); | |
| 368 } | |
| 369 macroarray_setsize(bucket, num-1); | |
| 370 total_macros--; | |
| 371 } | |
| 372 return m; | |
| 373 } | |
| 374 } | |
| 375 return NULL; | |
| 376 } | |
| 377 | |
| 378 static | |
| 19 | 379 struct macro * |
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380 macrotable_find(const char *name, bool remove_it) |
| 19 | 381 { |
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382 return macrotable_findlen(name, strlen(name), remove_it); |
| 19 | 383 } |
| 384 | |
| 385 static | |
| 17 | 386 void |
| 387 macrotable_rehash(void) | |
| 388 { | |
| 389 struct macroarray *newbucket, *oldbucket; | |
| 390 struct macro *m; | |
| 391 unsigned newmask, tossbit; | |
| 392 unsigned numbuckets, i; | |
| 393 unsigned oldnum, j, k; | |
| 394 | |
| 395 numbuckets = macroarrayarray_num(¯os); | |
| 396 macroarrayarray_setsize(¯os, numbuckets*2); | |
| 397 | |
| 398 assert(hashmask == numbuckets - 1); | |
| 399 newmask = (hashmask << 1) | 1U; | |
| 74 | 400 tossbit = newmask & ~hashmask; |
| 17 | 401 hashmask = newmask; |
| 402 | |
| 403 for (i=0; i<numbuckets; i++) { | |
| 404 newbucket = NULL; | |
| 405 oldbucket = macroarrayarray_get(¯os, i); | |
| 74 | 406 if (oldbucket == NULL) { |
| 407 macroarrayarray_set(¯os, numbuckets + i, NULL); | |
| 408 continue; | |
| 409 } | |
| 17 | 410 oldnum = macroarray_num(oldbucket); |
| 411 for (j=0; j<oldnum; j++) { | |
| 412 m = macroarray_get(oldbucket, j); | |
| 413 if (m->hash & tossbit) { | |
| 414 if (newbucket == NULL) { | |
| 415 newbucket = macroarray_create(); | |
| 416 } | |
| 417 macroarray_set(oldbucket, j, NULL); | |
| 418 macroarray_add(newbucket, m, NULL); | |
| 419 } | |
| 420 } | |
| 421 for (j=k=0; j<oldnum; j++) { | |
| 422 m = macroarray_get(oldbucket, j); | |
| 74 | 423 if (m != NULL) { |
| 424 if (k < j) { | |
| 425 macroarray_set(oldbucket, k, m); | |
| 426 } | |
| 427 k++; | |
| 17 | 428 } |
| 429 } | |
| 430 macroarray_setsize(oldbucket, k); | |
| 431 macroarrayarray_set(¯os, numbuckets + i, newbucket); | |
| 432 } | |
| 433 } | |
| 434 | |
| 435 static | |
| 436 void | |
| 437 macrotable_add(struct macro *m) | |
| 438 { | |
| 439 unsigned hash; | |
| 440 struct macroarray *bucket; | |
| 441 unsigned numbuckets; | |
| 442 | |
| 443 numbuckets = macroarrayarray_num(¯os); | |
| 444 if (total_macros > 0 && total_macros / numbuckets > 9) { | |
| 445 macrotable_rehash(); | |
| 446 } | |
| 447 | |
| 19 | 448 hash = hashfunc(m->name, strlen(m->name)); |
| 17 | 449 bucket = macroarrayarray_get(¯os, hash & hashmask); |
| 450 if (bucket == NULL) { | |
| 451 bucket = macroarray_create(); | |
| 452 macroarrayarray_set(¯os, hash & hashmask, bucket); | |
| 453 } | |
| 454 macroarray_add(bucket, m, NULL); | |
| 455 total_macros++; | |
| 456 } | |
| 457 | |
| 458 //////////////////////////////////////////////////////////// | |
| 459 // external macro definition interface | |
| 460 | |
| 18 | 461 static |
| 462 struct macro * | |
| 463 macro_define_common_start(struct place *p1, const char *macro, | |
| 19 | 464 struct place *p2) |
| 17 | 465 { |
| 466 struct macro *m; | |
| 19 | 467 unsigned hash; |
| 17 | 468 |
| 18 | 469 if (!is_identifier(macro)) { |
| 470 complain(p1, "Invalid macro name %s", macro); | |
| 471 complain_fail(); | |
| 472 } | |
| 473 | |
| 19 | 474 hash = hashfunc(macro, strlen(macro)); |
| 475 m = macro_create(p1, macro, hash, p2); | |
| 18 | 476 return m; |
| 477 } | |
| 478 | |
| 479 static | |
| 480 void | |
| 481 macro_define_common_end(struct macro *m) | |
| 482 { | |
| 483 struct macro *oldm; | |
| 484 bool ok; | |
| 485 | |
| 486 oldm = macrotable_find(m->name, false); | |
| 487 if (oldm != NULL) { | |
| 488 ok = macro_eq(m, oldm); | |
| 489 if (ok) { | |
|
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490 /* in traditional cpp this is silent */ |
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491 //complain(&m->defplace, |
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492 // "Warning: redefinition of %s", m->name); |
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493 //complain(&oldm->defplace, |
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494 // "Previous definition was here"); |
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495 //if (mode.werror) { |
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496 // complain_fail(); |
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497 //} |
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498 } else { |
| 18 | 499 complain(&m->defplace, |
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500 "Warning: non-identical redefinition of %s", |
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501 m->name); |
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502 complain(&oldm->defplace, |
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503 "Previous definition was here"); |
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504 /* in traditional cpp this is not fatal */ |
| 17 | 505 if (mode.werror) { |
| 506 complain_fail(); | |
| 507 } | |
| 508 } | |
| 18 | 509 macro_destroy(m); |
| 17 | 510 return; |
| 511 } | |
| 18 | 512 macrotable_add(m); |
| 513 } | |
| 17 | 514 |
| 18 | 515 static |
| 516 void | |
| 517 macro_parse_parameters(struct macro *m, struct place *p, const char *params) | |
| 518 { | |
| 519 size_t len; | |
| 520 const char *s; | |
| 521 char *param; | |
| 522 | |
| 523 while (params != NULL) { | |
| 524 len = strspn(params, ws); | |
| 525 params += len; | |
|
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526 place_addcolumns(p, len); |
| 18 | 527 s = strchr(params, ','); |
| 528 if (s) { | |
| 529 len = s-params; | |
| 530 param = dostrndup(params, len); | |
| 531 s++; | |
| 532 } else { | |
| 533 len = strlen(params); | |
| 534 param = dostrndup(params, len); | |
| 535 } | |
| 536 notrailingws(param, strlen(param)); | |
| 537 if (!is_identifier(param)) { | |
| 538 complain(p, "Invalid macro parameter name %s", param); | |
| 539 complain_fail(); | |
| 540 } else { | |
| 541 stringarray_add(&m->params, param, NULL); | |
| 542 } | |
| 543 params = s; | |
|
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544 place_addcolumns(p, len); |
| 18 | 545 } |
| 546 } | |
| 547 | |
| 19 | 548 static |
| 549 bool | |
| 550 isparam(struct macro *m, const char *name, size_t len, unsigned *num_ret) | |
| 551 { | |
| 552 unsigned num, i; | |
| 553 const char *param; | |
| 554 | |
| 555 num = stringarray_num(&m->params); | |
| 556 for (i=0; i<num; i++) { | |
| 557 param = stringarray_get(&m->params, i); | |
| 27 | 558 if (strlen(param) == len && !memcmp(name, param, len)) { |
| 19 | 559 *num_ret = i; |
| 560 return true; | |
| 561 } | |
| 562 } | |
| 563 return false; | |
| 564 } | |
| 565 | |
| 566 static | |
| 567 void | |
| 568 macro_parse_expansion(struct macro *m, const char *buf) | |
| 569 { | |
| 570 size_t blockstart, wordstart, pos; | |
| 571 struct expansionitem *ei; | |
| 572 unsigned param; | |
| 573 | |
| 574 pos = blockstart = 0; | |
| 575 while (buf[pos] != '\0') { | |
| 576 pos += strspn(buf+pos, ws); | |
| 577 if (strchr(alnum, buf[pos])) { | |
| 578 wordstart = pos; | |
| 579 pos += strspn(buf+pos, alnum); | |
| 580 if (isparam(m, buf+wordstart, pos-wordstart, ¶m)) { | |
| 144 | 581 if (wordstart > blockstart) { |
| 19 | 582 ei = expansionitem_create_stringlen( |
| 583 buf + blockstart, | |
| 27 | 584 wordstart - blockstart); |
| 19 | 585 expansionitemarray_add(&m->expansion, |
| 586 ei, NULL); | |
| 587 } | |
| 588 ei = expansionitem_create_param(param); | |
| 589 expansionitemarray_add(&m->expansion, ei,NULL); | |
| 590 blockstart = pos; | |
| 591 continue; | |
| 592 } | |
| 593 continue; | |
| 594 } | |
| 595 pos++; | |
| 596 } | |
| 597 if (pos > blockstart) { | |
| 598 ei = expansionitem_create_stringlen(buf + blockstart, | |
| 25 | 599 pos - blockstart); |
| 19 | 600 expansionitemarray_add(&m->expansion, ei, NULL); |
| 601 } | |
| 602 } | |
| 603 | |
| 18 | 604 void |
| 605 macro_define_plain(struct place *p1, const char *macro, | |
| 606 struct place *p2, const char *expansion) | |
| 607 { | |
| 608 struct macro *m; | |
| 19 | 609 struct expansionitem *ei; |
| 18 | 610 |
| 19 | 611 m = macro_define_common_start(p1, macro, p2); |
| 612 ei = expansionitem_create_string(expansion); | |
| 613 expansionitemarray_add(&m->expansion, ei, NULL); | |
| 18 | 614 macro_define_common_end(m); |
| 615 } | |
| 616 | |
| 617 void | |
| 618 macro_define_params(struct place *p1, const char *macro, | |
| 619 struct place *p2, const char *params, | |
| 620 struct place *p3, const char *expansion) | |
| 621 { | |
| 622 struct macro *m; | |
| 623 | |
| 19 | 624 m = macro_define_common_start(p1, macro, p3); |
| 25 | 625 m->hasparams = true; |
| 18 | 626 macro_parse_parameters(m, p2, params); |
| 19 | 627 macro_parse_expansion(m, expansion); |
| 18 | 628 macro_define_common_end(m); |
| 17 | 629 } |
| 630 | |
| 631 void | |
|
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632 macro_define_magic(struct place *p, const char *macro) |
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633 { |
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634 struct macro *m; |
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635 struct expansionitem *ei; |
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636 |
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637 m = macro_define_common_start(p, macro, p); |
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638 if (!strcmp(macro, "__FILE__")) { |
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639 ei = expansionitem_create_file(); |
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640 } |
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641 else { |
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642 assert(!strcmp(macro, "__LINE__")); |
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643 ei = expansionitem_create_line(); |
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644 } |
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645 expansionitemarray_add(&m->expansion, ei, NULL); |
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646 macro_define_common_end(m); |
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647 } |
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648 |
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649 void |
| 17 | 650 macro_undef(const char *macro) |
| 651 { | |
| 652 struct macro *m; | |
| 653 | |
| 654 m = macrotable_find(macro, true); | |
| 655 if (m) { | |
| 656 macro_destroy(m); | |
| 657 } | |
| 658 } | |
| 659 | |
| 660 bool | |
| 661 macro_isdefined(const char *macro) | |
| 662 { | |
| 663 struct macro *m; | |
| 664 | |
| 665 m = macrotable_find(macro, false); | |
| 666 return m != NULL; | |
| 667 } | |
| 668 | |
| 669 //////////////////////////////////////////////////////////// | |
| 670 // macro expansion | |
| 671 | |
| 19 | 672 struct expstate { |
| 673 bool honordefined; | |
| 674 enum { ES_NORMAL, ES_WANTLPAREN, ES_NOARG, ES_HAVEARG } state; | |
| 675 struct macro *curmacro; | |
| 676 struct stringarray args; | |
| 677 unsigned argparens; | |
| 678 | |
| 679 bool tobuf; | |
| 680 char *buf; | |
| 681 size_t bufpos, bufmax; | |
| 682 }; | |
| 683 | |
| 684 static struct expstate mainstate; | |
| 685 | |
| 686 static void doexpand(struct expstate *es, struct place *p, | |
|
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687 const char *buf, size_t len); |
| 19 | 688 |
| 689 static | |
| 690 void | |
| 691 expstate_init(struct expstate *es, bool tobuf, bool honordefined) | |
| 692 { | |
| 693 es->honordefined = honordefined; | |
| 694 es->state = ES_NORMAL; | |
| 695 es->curmacro = NULL; | |
| 696 stringarray_init(&es->args); | |
| 697 es->argparens = 0; | |
| 698 es->tobuf = tobuf; | |
| 699 es->buf = NULL; | |
| 700 es->bufpos = 0; | |
| 701 es->bufmax = 0; | |
| 702 } | |
| 703 | |
| 704 static | |
| 705 void | |
| 706 expstate_cleanup(struct expstate *es) | |
| 707 { | |
| 708 assert(es->state == ES_NORMAL); | |
| 709 stringarray_cleanup(&es->args); | |
| 710 if (es->buf) { | |
|
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711 dofree(es->buf, es->bufmax); |
| 19 | 712 } |
| 713 } | |
| 714 | |
| 715 static | |
| 716 void | |
| 717 expstate_destroyargs(struct expstate *es) | |
| 718 { | |
| 719 unsigned i, num; | |
| 720 | |
| 721 num = stringarray_num(&es->args); | |
| 722 for (i=0; i<num; i++) { | |
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723 dostrfree(stringarray_get(&es->args, i)); |
| 19 | 724 } |
| 725 stringarray_setsize(&es->args, 0); | |
| 726 } | |
| 727 | |
| 728 static | |
| 729 void | |
| 21 | 730 expand_send(struct expstate *es, struct place *p, const char *buf, size_t len) |
| 19 | 731 { |
|
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732 size_t oldmax; |
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733 |
| 19 | 734 if (es->tobuf) { |
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735 assert(es->bufpos <= es->bufmax); |
| 19 | 736 if (es->bufpos + len > es->bufmax) { |
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737 oldmax = es->bufmax; |
| 19 | 738 if (es->bufmax == 0) { |
| 739 es->bufmax = 64; | |
| 740 } | |
| 741 while (es->bufpos + len > es->bufmax) { | |
| 742 es->bufmax *= 2; | |
| 743 } | |
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744 es->buf = dorealloc(es->buf, oldmax, es->bufmax); |
| 19 | 745 } |
| 746 memcpy(es->buf + es->bufpos, buf, len); | |
| 747 es->bufpos += len; | |
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748 assert(es->bufpos <= es->bufmax); |
| 19 | 749 } else { |
| 21 | 750 output(p, buf, len); |
| 19 | 751 } |
| 752 } | |
| 753 | |
| 754 static | |
| 755 void | |
| 21 | 756 expand_send_eof(struct expstate *es, struct place *p) |
| 19 | 757 { |
| 758 if (es->tobuf) { | |
| 21 | 759 expand_send(es, p, "", 1); |
| 19 | 760 es->bufpos--; |
| 761 } else { | |
| 762 output_eof(); | |
| 763 } | |
| 764 } | |
| 765 | |
| 766 static | |
| 767 void | |
| 161 | 768 expand_newarg(struct expstate *es, const char *buf, size_t len) |
| 19 | 769 { |
| 770 char *text; | |
| 771 | |
| 772 text = dostrndup(buf, len); | |
| 773 stringarray_add(&es->args, text, NULL); | |
| 774 } | |
| 775 | |
| 776 static | |
| 777 void | |
| 161 | 778 expand_appendarg(struct expstate *es, const char *buf, size_t len) |
| 19 | 779 { |
| 780 unsigned num; | |
| 781 char *text; | |
| 782 size_t oldlen; | |
| 783 | |
| 784 num = stringarray_num(&es->args); | |
| 785 assert(num > 0); | |
| 786 | |
| 787 text = stringarray_get(&es->args, num - 1); | |
| 788 oldlen = strlen(text); | |
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789 text = dorealloc(text, oldlen + 1, oldlen + len + 1); |
| 19 | 790 memcpy(text + oldlen, buf, len); |
| 791 text[oldlen+len] = '\0'; | |
| 792 stringarray_set(&es->args, num - 1, text); | |
| 793 } | |
| 794 | |
| 795 static | |
| 796 char * | |
| 28 | 797 expand_substitute(struct place *p, struct expstate *es) |
| 19 | 798 { |
| 799 struct expansionitem *ei; | |
| 800 unsigned i, num; | |
| 801 size_t len; | |
| 802 char *arg; | |
| 803 char *ret; | |
| 28 | 804 unsigned numargs, numparams; |
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805 char numbuf[64]; |
| 28 | 806 |
| 807 numargs = stringarray_num(&es->args); | |
| 808 numparams = stringarray_num(&es->curmacro->params); | |
| 809 | |
| 810 if (numargs == 0 && numparams == 1) { | |
| 811 /* no arguments <=> one empty argument */ | |
| 812 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 813 numargs++; | |
| 814 } | |
| 815 if (numargs != numparams) { | |
| 816 complain(p, "Wrong number of arguments for macro %s; " | |
| 817 "found %u, expected %u", | |
| 818 es->curmacro->name, numargs, numparams); | |
| 819 complain_fail(); | |
| 820 while (numargs < numparams) { | |
| 821 stringarray_add(&es->args, dostrdup(""), NULL); | |
| 822 numargs++; | |
| 823 } | |
| 824 } | |
| 19 | 825 |
| 826 len = 0; | |
| 827 num = expansionitemarray_num(&es->curmacro->expansion); | |
| 828 for (i=0; i<num; i++) { | |
| 829 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
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830 switch (ei->itemtype) { |
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831 case EI_STRING: |
| 184 | 832 len += strlen(ei->ei_string); |
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833 break; |
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834 case EI_PARAM: |
| 184 | 835 arg = stringarray_get(&es->args, ei->ei_param); |
| 19 | 836 len += strlen(arg); |
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837 break; |
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838 case EI_FILE: |
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839 len += strlen(place_getname(p)) + 2; |
|
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840 break; |
|
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841 case EI_LINE: |
|
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842 len += snprintf(numbuf, sizeof(numbuf), "%u", p->line); |
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843 break; |
| 19 | 844 } |
| 845 } | |
| 846 | |
| 847 ret = domalloc(len+1); | |
| 848 *ret = '\0'; | |
| 849 for (i=0; i<num; i++) { | |
| 850 ei = expansionitemarray_get(&es->curmacro->expansion, i); | |
|
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851 switch (ei->itemtype) { |
|
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852 case EI_STRING: |
| 184 | 853 strcat(ret, ei->ei_string); |
|
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854 break; |
|
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855 case EI_PARAM: |
| 184 | 856 arg = stringarray_get(&es->args, ei->ei_param); |
| 19 | 857 strcat(ret, arg); |
|
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858 break; |
|
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859 case EI_FILE: |
|
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860 strcat(ret, "\""); |
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861 strcat(ret, place_getname(p)); |
|
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862 strcat(ret, "\""); |
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863 break; |
|
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864 case EI_LINE: |
|
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865 snprintf(numbuf, sizeof(numbuf), "%u", p->line); |
|
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|
866 strcat(ret, numbuf); |
|
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|
867 break; |
| 19 | 868 } |
| 869 } | |
| 870 | |
| 871 return ret; | |
| 872 } | |
| 873 | |
| 874 static | |
| 875 void | |
| 876 expand_domacro(struct expstate *es, struct place *p) | |
| 877 { | |
| 878 struct macro *m; | |
|
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879 const char *name, *val; |
| 19 | 880 char *newbuf, *newbuf2; |
| 881 | |
| 882 if (es->curmacro == NULL) { | |
| 883 /* defined() */ | |
| 884 if (stringarray_num(&es->args) != 1) { | |
| 885 complain(p, "Too many arguments for defined()"); | |
| 886 complain_fail(); | |
| 21 | 887 expand_send(es, p, "0", 1); |
| 19 | 888 return; |
| 889 } | |
|
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890 name = stringarray_get(&es->args, 0); |
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891 m = macrotable_find(name, false); |
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892 val = (m != NULL) ? "1" : "0"; |
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893 debuglog(p, "defined(%s): %s", name, val); |
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894 expand_send(es, p, val, 1); |
| 25 | 895 expstate_destroyargs(es); |
| 19 | 896 return; |
| 897 } | |
| 898 | |
| 192 | 899 m = es->curmacro; |
| 900 assert(m->inuse == false); | |
| 901 m->inuse = true; | |
| 19 | 902 |
|
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903 debuglog(p, "Expanding macro %s", m->name); |
| 28 | 904 newbuf = expand_substitute(p, es); |
|
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905 debuglog(p, "Substituting for %s: %s", m->name, newbuf); |
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906 |
| 19 | 907 newbuf2 = macroexpand(p, newbuf, strlen(newbuf), false); |
|
39
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|
908 dostrfree(newbuf); |
| 25 | 909 expstate_destroyargs(es); |
|
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910 debuglog(p, "Complete expansion for %s: %s", m->name, newbuf2); |
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911 |
| 19 | 912 doexpand(es, p, newbuf2, strlen(newbuf2)); |
|
39
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913 dostrfree(newbuf2); |
| 19 | 914 |
| 192 | 915 m->inuse = false; |
| 19 | 916 } |
| 917 | |
|
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918 /* |
|
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919 * The traditional behavior if a function-like macro appears without |
|
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920 * arguments is to pretend it isn't a macro; that is, just emit its |
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921 * name. |
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922 */ |
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923 static |
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924 void |
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925 expand_missingargs(struct expstate *es, struct place *p, bool needspace) |
|
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926 { |
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927 if (es->curmacro == NULL) { |
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928 /* defined */ |
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929 expand_send(es, p, "defined", 7); |
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930 return; |
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931 } |
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932 expand_send(es, p, es->curmacro->name, strlen(es->curmacro->name)); |
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933 /* send a space in case we ate whitespace after the macro name */ |
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934 if (needspace) { |
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935 expand_send(es, p, " ", 1); |
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936 } |
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937 } |
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938 |
| 19 | 939 static |
| 940 void | |
|
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941 expand_got_ws(struct expstate *es, struct place *p, |
|
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942 const char *buf, size_t len) |
| 19 | 943 { |
| 944 switch (es->state) { | |
| 945 case ES_NORMAL: | |
| 21 | 946 expand_send(es, p, buf, len); |
| 19 | 947 break; |
| 948 case ES_WANTLPAREN: | |
| 152 | 949 /* XXX notyet */ |
| 950 //expand_send(es, p, buf, len); | |
| 19 | 951 break; |
| 952 case ES_NOARG: | |
|
118
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953 expand_newarg(es, buf, len); |
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|
954 es->state = ES_HAVEARG; |
| 19 | 955 break; |
| 956 case ES_HAVEARG: | |
| 957 expand_appendarg(es, buf, len); | |
| 958 break; | |
| 959 } | |
| 960 } | |
| 961 | |
| 962 static | |
| 963 void | |
|
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964 expand_got_word(struct expstate *es, struct place *p, |
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965 const char *buf, size_t len) |
| 19 | 966 { |
| 967 struct macro *m; | |
| 17 | 968 |
| 19 | 969 switch (es->state) { |
| 970 case ES_NORMAL: | |
| 971 if (es->honordefined && | |
| 972 len == 7 && !memcmp(buf, "defined", 7)) { | |
| 973 es->curmacro = NULL; | |
| 974 es->state = ES_WANTLPAREN; | |
| 975 break; | |
| 976 } | |
| 977 m = macrotable_findlen(buf, len, false); | |
|
42
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978 if (m == NULL || m->inuse) { |
| 21 | 979 expand_send(es, p, buf, len); |
| 19 | 980 } else if (!m->hasparams) { |
|
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981 es->curmacro = m; |
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982 expand_domacro(es, p); |
| 19 | 983 } else { |
| 984 es->curmacro = m; | |
| 985 es->state = ES_WANTLPAREN; | |
| 986 } | |
| 987 break; | |
| 988 case ES_WANTLPAREN: | |
| 989 if (es->curmacro != NULL) { | |
|
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990 expand_missingargs(es, p, true); |
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991 es->state = ES_NORMAL; |
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992 /* try again */ |
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993 expand_got_word(es, p, buf, len); |
| 19 | 994 } else { |
| 995 /* "defined foo" means "defined(foo)" */ | |
| 996 expand_newarg(es, buf, len); | |
| 997 es->state = ES_NORMAL; | |
| 998 expand_domacro(es, p); | |
| 999 } | |
| 1000 break; | |
| 1001 case ES_NOARG: | |
| 1002 expand_newarg(es, buf, len); | |
| 1003 es->state = ES_HAVEARG; | |
| 1004 break; | |
| 1005 case ES_HAVEARG: | |
| 1006 expand_appendarg(es, buf, len); | |
| 1007 break; | |
| 1008 } | |
| 1009 } | |
| 1010 | |
| 1011 static | |
| 1012 void | |
|
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1013 expand_got_lparen(struct expstate *es, struct place *p, |
|
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1014 const char *buf, size_t len) |
| 19 | 1015 { |
| 1016 switch (es->state) { | |
| 1017 case ES_NORMAL: | |
| 21 | 1018 expand_send(es, p, buf, len); |
| 19 | 1019 break; |
| 1020 case ES_WANTLPAREN: | |
| 1021 es->state = ES_NOARG; | |
| 1022 break; | |
| 1023 case ES_NOARG: | |
| 1024 expand_newarg(es, buf, len); | |
| 1025 es->state = ES_HAVEARG; | |
| 1026 es->argparens++; | |
| 1027 break; | |
| 1028 case ES_HAVEARG: | |
| 1029 expand_appendarg(es, buf, len); | |
| 1030 es->argparens++; | |
| 1031 break; | |
| 1032 } | |
| 1033 } | |
| 1034 | |
| 1035 static | |
| 1036 void | |
|
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1037 expand_got_rparen(struct expstate *es, struct place *p, |
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1038 const char *buf, size_t len) |
| 19 | 1039 { |
| 1040 switch (es->state) { | |
| 1041 case ES_NORMAL: | |
| 21 | 1042 expand_send(es, p, buf, len); |
| 19 | 1043 break; |
| 1044 case ES_WANTLPAREN: | |
|
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1045 expand_missingargs(es, p, false); |
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1046 es->state = ES_NORMAL; |
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1047 /* try again */ |
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1048 expand_got_rparen(es, p, buf, len); |
| 19 | 1049 break; |
| 1050 case ES_NOARG: | |
| 1051 assert(es->argparens == 0); | |
|
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1052 if (stringarray_num(&es->args) > 0) { |
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1053 /* we are after a comma; enter an empty argument */ |
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1054 expand_newarg(es, buf, 0); |
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1055 } |
| 19 | 1056 es->state = ES_NORMAL; |
| 1057 expand_domacro(es, p); | |
| 1058 break; | |
| 1059 case ES_HAVEARG: | |
| 1060 if (es->argparens > 0) { | |
| 1061 es->argparens--; | |
| 1062 expand_appendarg(es, buf, len); | |
| 1063 } else { | |
| 1064 es->state = ES_NORMAL; | |
| 1065 expand_domacro(es, p); | |
| 1066 } | |
| 1067 break; | |
| 1068 } | |
| 1069 } | |
| 1070 | |
| 1071 static | |
| 1072 void | |
|
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1073 expand_got_comma(struct expstate *es, struct place *p, |
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1074 const char *buf, size_t len) |
| 19 | 1075 { |
| 1076 switch (es->state) { | |
| 1077 case ES_NORMAL: | |
| 21 | 1078 expand_send(es, p, buf, len); |
| 19 | 1079 break; |
| 1080 case ES_WANTLPAREN: | |
|
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1081 expand_missingargs(es, p, false); |
|
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1082 es->state = ES_NORMAL; |
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|
1083 /* try again */ |
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|
1084 expand_got_comma(es, p, buf, len); |
| 19 | 1085 break; |
| 1086 case ES_NOARG: | |
| 1087 assert(es->argparens == 0); | |
| 1088 expand_newarg(es, buf, 0); | |
| 1089 break; | |
| 1090 case ES_HAVEARG: | |
| 1091 if (es->argparens > 0) { | |
| 1092 expand_appendarg(es, buf, len); | |
| 1093 } else { | |
| 1094 es->state = ES_NOARG; | |
| 1095 } | |
| 1096 break; | |
| 1097 } | |
| 1098 } | |
| 1099 | |
| 1100 static | |
| 1101 void | |
|
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1102 expand_got_other(struct expstate *es, struct place *p, |
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1103 const char *buf, size_t len) |
| 19 | 1104 { |
| 1105 switch (es->state) { | |
| 1106 case ES_NORMAL: | |
| 21 | 1107 expand_send(es, p, buf, len); |
| 19 | 1108 break; |
| 1109 case ES_WANTLPAREN: | |
|
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1110 expand_missingargs(es, p, false); |
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1111 es->state = ES_NORMAL; |
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1112 /* try again */ |
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1113 expand_got_other(es, p, buf, len); |
| 19 | 1114 break; |
| 1115 case ES_NOARG: | |
| 1116 expand_newarg(es, buf, len); | |
| 1117 es->state = ES_HAVEARG; | |
| 1118 break; | |
| 1119 case ES_HAVEARG: | |
| 1120 expand_appendarg(es, buf, len); | |
| 1121 break; | |
| 1122 } | |
| 1123 } | |
| 1124 | |
| 1125 static | |
| 1126 void | |
| 1127 expand_got_eof(struct expstate *es, struct place *p) | |
| 1128 { | |
| 1129 switch (es->state) { | |
| 1130 case ES_NORMAL: | |
| 1131 break; | |
| 1132 case ES_WANTLPAREN: | |
|
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1133 expand_missingargs(es, p, false); |
| 19 | 1134 break; |
| 1135 case ES_NOARG: | |
| 1136 case ES_HAVEARG: | |
| 1137 if (es->curmacro) { | |
| 1138 complain(p, "Unclosed argument list for macro %s", | |
| 1139 es->curmacro->name); | |
| 1140 } else { | |
| 1141 complain(p, "Unclosed argument list for defined()"); | |
| 1142 } | |
| 1143 complain_fail(); | |
| 1144 expstate_destroyargs(es); | |
| 1145 break; | |
| 1146 } | |
| 88 | 1147 expand_send_eof(es, p); |
| 19 | 1148 es->state = ES_NORMAL; |
| 1149 es->curmacro = NULL; | |
| 1150 es->argparens = 0; | |
| 1151 } | |
| 1152 | |
| 1153 static | |
| 1154 void | |
|
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1155 doexpand(struct expstate *es, struct place *p, const char *buf, size_t len) |
| 19 | 1156 { |
| 85 | 1157 char *s; |
| 19 | 1158 size_t x; |
| 85 | 1159 bool inquote = false; |
|
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1160 char quote = '\0'; |
| 19 | 1161 |
| 1162 while (len > 0) { | |
| 1163 x = strspn(buf, ws); | |
| 28 | 1164 if (x > len) { |
| 1165 /* XXX gross, need strnspn */ | |
| 1166 x = len; | |
| 1167 } | |
| 1168 | |
| 19 | 1169 if (x > 0) { |
| 1170 expand_got_ws(es, p, buf, x); | |
| 1171 buf += x; | |
| 1172 len -= x; | |
| 28 | 1173 continue; |
| 19 | 1174 } |
| 1175 | |
| 1176 x = strspn(buf, alnum); | |
| 28 | 1177 if (x > len) { |
| 1178 /* XXX gross, need strnspn */ | |
| 1179 x = len; | |
| 1180 } | |
| 1181 | |
| 145 | 1182 if (!inquote && x > 0) { |
| 19 | 1183 expand_got_word(es, p, buf, x); |
| 1184 buf += x; | |
| 1185 len -= x; | |
| 1186 continue; | |
| 1187 } | |
| 1188 | |
| 85 | 1189 if (!inquote && len > 1 && buf[0] == '/' && buf[1] == '*') { |
| 1190 s = strstr(buf, "*/"); | |
| 1191 if (s) { | |
| 1192 x = s - buf; | |
| 1193 } else { | |
| 1194 x = len; | |
| 1195 } | |
| 1196 expand_got_ws(es, p, buf, x); | |
| 1197 buf += x; | |
| 1198 len -= x; | |
| 1199 continue; | |
| 1200 } | |
| 1201 | |
|
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1202 if (!inquote && buf[0] == '(') { |
| 19 | 1203 expand_got_lparen(es, p, buf, 1); |
| 1204 buf++; | |
| 1205 len--; | |
| 1206 continue; | |
| 1207 } | |
| 1208 | |
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1209 if (!inquote && buf[0] == ')') { |
| 19 | 1210 expand_got_rparen(es, p, buf, 1); |
| 1211 buf++; | |
| 1212 len--; | |
| 1213 continue; | |
| 1214 } | |
| 1215 | |
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1216 if (!inquote && buf[0] == ',') { |
| 19 | 1217 expand_got_comma(es, p, buf, 1); |
| 1218 buf++; | |
| 1219 len--; | |
| 1220 continue; | |
| 1221 } | |
| 1222 | |
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1223 if (len > 1 && buf[0] == '\\' && |
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1224 (buf[1] == '"' || buf[1] == '\'')) { |
| 85 | 1225 expand_got_other(es, p, buf, 2); |
| 1226 buf += 2; | |
| 1227 len -= 2; | |
| 1228 continue; | |
| 1229 } | |
|
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1230 if (!inquote && (buf[0] == '"' || buf[0] == '\'')) { |
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1231 inquote = true; |
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1232 quote = buf[0]; |
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1233 } else if (inquote && buf[0] == quote) { |
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1234 inquote = false; |
| 85 | 1235 } |
| 1236 | |
| 19 | 1237 expand_got_other(es, p, buf, 1); |
| 1238 buf++; | |
| 1239 len--; | |
| 1240 } | |
| 1241 } | |
| 1242 | |
| 1243 char * | |
|
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1244 macroexpand(struct place *p, const char *buf, size_t len, bool honordefined) |
| 19 | 1245 { |
| 1246 struct expstate es; | |
| 1247 char *ret; | |
| 1248 | |
| 1249 expstate_init(&es, true, honordefined); | |
| 1250 doexpand(&es, p, buf, len); | |
| 1251 expand_got_eof(&es, p); | |
| 40 | 1252 |
| 1253 /* trim to fit, so the malloc debugging won't complain */ | |
| 1254 es.buf = dorealloc(es.buf, es.bufmax, strlen(es.buf) + 1); | |
| 1255 | |
| 19 | 1256 ret = es.buf; |
| 1257 es.buf = NULL; | |
|
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1258 es.bufpos = es.bufmax = 0; |
| 40 | 1259 |
| 19 | 1260 expstate_cleanup(&es); |
| 1261 | |
| 1262 return ret; | |
| 1263 } | |
| 1264 | |
| 1265 void | |
|
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1266 macro_sendline(struct place *p, const char *buf, size_t len) |
| 19 | 1267 { |
| 1268 doexpand(&mainstate, p, buf, len); | |
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1269 switch (mainstate.state) { |
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1270 case ES_NORMAL: |
| 175 | 1271 /* |
| 1272 * If we were sent a blank line, don't emit a newline | |
| 1273 * for it. This matches the prior behavior of tradcpp. | |
| 1274 */ | |
| 1275 if (len > 0) { | |
| 1276 output(p, "\n", 1); | |
| 1277 } | |
|
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1278 break; |
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1279 case ES_WANTLPAREN: |
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1280 case ES_NOARG: |
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1281 case ES_HAVEARG: |
| 175 | 1282 /* |
| 1283 * Apparently to match gcc's -traditional behavior we | |
| 1284 * need to emit a space for each newline that appears | |
| 1285 * while processing macro args. | |
| 1286 */ | |
|
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1287 expand_got_ws(&mainstate, p, " ", 1); |
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1288 break; |
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1289 } |
| 19 | 1290 } |
| 1291 | |
| 1292 void | |
| 1293 macro_sendeof(struct place *p) | |
| 1294 { | |
| 1295 expand_got_eof(&mainstate, p); | |
| 1296 } | |
| 17 | 1297 |
| 1298 //////////////////////////////////////////////////////////// | |
| 1299 // module initialization | |
| 1300 | |
| 1301 void | |
| 1302 macros_init(void) | |
| 1303 { | |
| 1304 macrotable_init(); | |
| 19 | 1305 expstate_init(&mainstate, false, false); |
| 17 | 1306 } |
| 1307 | |
| 1308 void | |
| 1309 macros_cleanup(void) | |
| 1310 { | |
| 19 | 1311 expstate_cleanup(&mainstate); |
| 17 | 1312 macrotable_cleanup(); |
| 1313 } |