Mercurial > ~dholland > hg > tradcpp > index.cgi
annotate directive.c @ 135:eaae8014a94a
Don't assert and leak memory if failing during argument collection.
Once you have a -D option or a -include foo option, you need to clean
up the arrays those are accumulated in if you die before they're
collected and handled.
| author | David A. Holland |
|---|---|
| date | Tue, 09 Jul 2013 13:35:40 -0400 |
| parents | 1cda505ddc78 |
| children | a2c2fe8dbea3 d6e6b3940780 |
| 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 | |
| 15 | 30 #include <assert.h> |
| 31 #include <stdbool.h> | |
| 32 #include <stdlib.h> | |
| 33 #include <string.h> | |
| 34 | |
| 35 #include "utils.h" | |
| 36 #include "mode.h" | |
| 37 #include "place.h" | |
| 38 #include "files.h" | |
| 39 #include "directive.h" | |
| 40 #include "macro.h" | |
| 41 #include "eval.h" | |
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42 #include "output.h" |
| 15 | 43 |
| 44 struct ifstate { | |
| 45 struct ifstate *prev; | |
| 46 struct place startplace; | |
| 47 bool curtrue; | |
| 48 bool evertrue; | |
| 49 bool seenelse; | |
| 50 }; | |
| 51 | |
| 52 static struct ifstate *ifstate; | |
| 53 | |
| 54 //////////////////////////////////////////////////////////// | |
| 55 // common parsing bits | |
| 56 | |
| 57 static | |
| 58 void | |
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59 uncomment(char *buf) |
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60 { |
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61 char *s, *t, *u = NULL; |
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62 bool incomment = false; |
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63 bool inesc = false; |
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64 bool inquote = false; |
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65 char quote = '\0'; |
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66 |
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67 for (s = t = buf; *s; s++) { |
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68 if (incomment) { |
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69 if (s[0] == '*' && s[1] == '/') { |
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70 s++; |
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71 incomment = false; |
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72 } |
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73 } else { |
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74 if (!inquote && s[0] == '/' && s[1] == '*') { |
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75 incomment = true; |
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76 } else { |
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77 if (inesc) { |
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78 inesc = false; |
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79 } else if (s[0] == '\\') { |
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80 inesc = true; |
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81 } else if (!inquote && |
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82 (s[0] == '"' || s[0] == '\'')) { |
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83 inquote = true; |
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84 quote = s[0]; |
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85 } else if (inquote && s[0] == quote) { |
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86 inquote = false; |
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87 } |
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88 |
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89 if (t != s) { |
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90 *t = *s; |
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91 } |
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92 if (!strchr(ws, *t)) { |
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93 u = t; |
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94 } |
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95 t++; |
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96 } |
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97 } |
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98 } |
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99 if (u) { |
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100 /* end string after last non-whitespace char */ |
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101 u[1] = '\0'; |
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102 } else { |
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103 *t = '\0'; |
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104 } |
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105 } |
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106 |
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107 static |
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108 void |
| 15 | 109 oneword(const char *what, struct place *p2, char *line) |
| 110 { | |
| 111 size_t pos; | |
| 112 | |
| 113 pos = strcspn(line, ws); | |
| 114 if (line[pos] != '\0') { | |
| 115 p2->column += pos; | |
| 116 complain(p2, "Garbage after %s argument", what); | |
| 117 complain_fail(); | |
| 118 line[pos] = '\0'; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 //////////////////////////////////////////////////////////// | |
| 123 // if handling | |
| 124 | |
| 125 static | |
| 126 struct ifstate * | |
| 127 ifstate_create(struct ifstate *prev, struct place *p, bool startstate) | |
| 128 { | |
| 129 struct ifstate *is; | |
| 130 | |
| 131 is = domalloc(sizeof(*is)); | |
| 132 is->prev = prev; | |
| 133 if (p != NULL) { | |
| 134 is->startplace = *p; | |
| 135 } else { | |
| 136 place_setbuiltin(&is->startplace, 1); | |
| 137 } | |
| 138 is->curtrue = startstate; | |
| 139 is->evertrue = is->curtrue; | |
| 140 is->seenelse = false; | |
| 141 return is; | |
| 142 } | |
| 143 | |
| 144 static | |
| 145 void | |
| 146 ifstate_destroy(struct ifstate *is) | |
| 147 { | |
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148 dofree(is, sizeof(*is)); |
| 15 | 149 } |
| 150 | |
| 151 static | |
| 152 void | |
| 153 ifstate_push(struct place *p, bool startstate) | |
| 154 { | |
| 72 | 155 struct ifstate *newstate; |
| 156 | |
| 157 newstate = ifstate_create(ifstate, p, startstate); | |
| 158 if (!ifstate->curtrue) { | |
| 159 newstate->curtrue = false; | |
| 160 newstate->evertrue = true; | |
| 161 } | |
| 162 ifstate = newstate; | |
| 15 | 163 } |
| 164 | |
| 165 static | |
| 166 void | |
| 167 ifstate_pop(void) | |
| 168 { | |
| 169 struct ifstate *is; | |
| 170 | |
| 171 is = ifstate; | |
| 172 ifstate = ifstate->prev; | |
| 173 ifstate_destroy(is); | |
| 174 } | |
| 175 | |
| 176 static | |
| 177 void | |
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178 d_if(struct place *p, struct place *p2, char *line) |
| 15 | 179 { |
| 180 char *expr; | |
| 181 bool val; | |
| 16 | 182 struct place p3 = *p2; |
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183 size_t oldlen; |
| 15 | 184 |
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185 expr = macroexpand(p2, line, strlen(line), true); |
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186 |
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187 oldlen = strlen(expr); |
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188 uncomment(expr); |
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189 /* trim to fit, so the malloc debugging won't complain */ |
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190 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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191 |
| 127 | 192 if (ifstate->curtrue) { |
| 193 val = eval(&p3, expr); | |
| 194 } else { | |
| 195 val = 0; | |
| 196 } | |
| 15 | 197 ifstate_push(p, val); |
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198 dostrfree(expr); |
| 15 | 199 } |
| 200 | |
| 201 static | |
| 202 void | |
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203 d_ifdef(struct place *p, struct place *p2, char *line) |
| 15 | 204 { |
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205 uncomment(line); |
| 15 | 206 oneword("#ifdef", p2, line); |
| 207 ifstate_push(p, macro_isdefined(line)); | |
| 208 } | |
| 209 | |
| 210 static | |
| 211 void | |
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212 d_ifndef(struct place *p, struct place *p2, char *line) |
| 15 | 213 { |
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214 uncomment(line); |
| 15 | 215 oneword("#ifndef", p2, line); |
| 216 ifstate_push(p, !macro_isdefined(line)); | |
| 217 } | |
| 218 | |
| 219 static | |
| 220 void | |
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221 d_elif(struct place *p, struct place *p2, char *line) |
| 15 | 222 { |
| 223 char *expr; | |
| 16 | 224 struct place p3 = *p2; |
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225 size_t oldlen; |
| 15 | 226 |
| 227 if (ifstate->seenelse) { | |
| 228 complain(p, "#elif after #else"); | |
| 229 complain_fail(); | |
| 230 } | |
| 231 | |
| 232 if (ifstate->evertrue) { | |
| 233 ifstate->curtrue = false; | |
| 234 } else { | |
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235 expr = macroexpand(p2, line, strlen(line), true); |
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236 |
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237 oldlen = strlen(expr); |
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238 uncomment(expr); |
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239 /* trim to fit, so the malloc debugging won't complain */ |
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240 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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241 |
| 16 | 242 ifstate->curtrue = eval(&p3, expr); |
| 15 | 243 ifstate->evertrue = ifstate->curtrue; |
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244 dostrfree(expr); |
| 15 | 245 } |
| 246 } | |
| 247 | |
| 248 static | |
| 249 void | |
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250 d_else(struct place *p, struct place *p2, char *line) |
| 15 | 251 { |
| 103 | 252 (void)p2; |
| 253 (void)line; | |
| 254 | |
| 15 | 255 if (ifstate->seenelse) { |
| 256 complain(p, "Multiple #else directives in one conditional"); | |
| 257 complain_fail(); | |
| 258 } | |
| 259 | |
| 260 ifstate->curtrue = !ifstate->evertrue; | |
| 261 ifstate->evertrue = true; | |
| 262 ifstate->seenelse = true; | |
| 263 } | |
| 264 | |
| 265 static | |
| 266 void | |
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267 d_endif(struct place *p, struct place *p2, char *line) |
| 15 | 268 { |
| 103 | 269 (void)p2; |
| 270 (void)line; | |
| 271 | |
| 15 | 272 if (ifstate->prev == NULL) { |
| 273 complain(p, "Unmatched #endif"); | |
| 274 complain_fail(); | |
| 275 } else { | |
| 276 ifstate_pop(); | |
| 277 } | |
| 278 } | |
| 279 | |
| 280 //////////////////////////////////////////////////////////// | |
| 281 // macros | |
| 282 | |
| 283 static | |
| 284 void | |
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285 d_define(struct place *p, struct place *p2, char *line) |
| 15 | 286 { |
| 18 | 287 size_t pos, argpos; |
| 288 struct place p3, p4; | |
| 15 | 289 |
| 103 | 290 (void)p; |
| 291 | |
| 15 | 292 /* |
| 293 * line may be: | |
| 294 * macro expansion | |
| 295 * macro(arg, arg, ...) expansion | |
| 296 */ | |
| 297 | |
| 298 pos = strcspn(line, " \t\f\v("); | |
| 299 if (line[pos] == '(') { | |
| 18 | 300 line[pos++] = '\0'; |
| 301 argpos = pos; | |
| 15 | 302 pos = pos + strcspn(line+pos, "()"); |
| 303 if (line[pos] == '(') { | |
| 304 p2->column += pos; | |
| 305 complain(p2, "Left parenthesis in macro parameters"); | |
| 306 complain_fail(); | |
| 307 return; | |
| 308 } | |
| 309 if (line[pos] != ')') { | |
| 310 p2->column += pos; | |
| 311 complain(p2, "Unclosed macro parameter list"); | |
| 312 complain_fail(); | |
| 313 return; | |
| 314 } | |
| 18 | 315 line[pos++] = '\0'; |
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316 #if 0 |
| 15 | 317 if (!strchr(ws, line[pos])) { |
| 318 p2->column += pos; | |
| 319 complain(p2, "Trash after macro parameter list"); | |
| 320 complain_fail(); | |
| 321 return; | |
| 322 } | |
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323 #endif |
| 15 | 324 } else if (line[pos] == '\0') { |
| 18 | 325 argpos = 0; |
| 15 | 326 } else { |
| 327 line[pos++] = '\0'; | |
| 18 | 328 argpos = 0; |
| 15 | 329 } |
| 330 | |
| 331 pos += strspn(line+pos, ws); | |
| 332 | |
| 333 p3 = *p2; | |
| 18 | 334 p3.column += argpos; |
| 335 | |
| 336 p4 = *p2; | |
| 337 p4.column += pos; | |
| 338 | |
| 339 if (argpos) { | |
| 340 macro_define_params(p2, line, &p3, | |
| 341 line + argpos, &p4, | |
| 342 line + pos); | |
| 343 } else { | |
| 344 macro_define_plain(p2, line, &p4, line + pos); | |
| 345 } | |
| 15 | 346 } |
| 347 | |
| 348 static | |
| 349 void | |
|
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350 d_undef(struct place *p, struct place *p2, char *line) |
| 15 | 351 { |
| 103 | 352 (void)p; |
| 353 | |
|
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354 uncomment(line); |
| 15 | 355 oneword("#undef", p2, line); |
| 356 macro_undef(line); | |
| 357 } | |
| 358 | |
| 359 //////////////////////////////////////////////////////////// | |
| 360 // includes | |
| 361 | |
| 362 static | |
| 363 bool | |
|
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364 tryinclude(struct place *p, char *line) |
| 15 | 365 { |
|
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366 size_t len; |
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367 |
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368 len = strlen(line); |
| 15 | 369 if (len > 2 && line[0] == '"' && line[len-1] == '"') { |
| 370 line[len-1] = '\0'; | |
| 371 file_readquote(p, line+1); | |
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372 line[len-1] = '"'; |
| 15 | 373 return true; |
| 374 } | |
| 375 if (len > 2 && line[0] == '<' && line[len-1] == '>') { | |
| 376 line[len-1] = '\0'; | |
| 377 file_readbracket(p, line+1); | |
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378 line[len-1] = '>'; |
| 15 | 379 return true; |
| 380 } | |
| 381 return false; | |
| 382 } | |
| 383 | |
| 384 static | |
| 385 void | |
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386 d_include(struct place *p, struct place *p2, char *line) |
| 15 | 387 { |
| 388 char *text; | |
|
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389 size_t oldlen; |
| 15 | 390 |
|
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391 uncomment(line); |
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392 if (tryinclude(p, line)) { |
| 15 | 393 return; |
| 394 } | |
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395 text = macroexpand(p2, line, strlen(line), false); |
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396 |
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397 oldlen = strlen(text); |
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398 uncomment(text); |
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399 /* trim to fit, so the malloc debugging won't complain */ |
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400 text = dorealloc(text, oldlen + 1, strlen(text) + 1); |
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401 |
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402 if (tryinclude(p, text)) { |
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403 dostrfree(text); |
| 15 | 404 return; |
| 405 } | |
| 90 | 406 complain(p, "Illegal #include directive"); |
| 407 complain(p, "Before macro expansion: #include %s", line); | |
| 408 complain(p, "After macro expansion: #include %s", text); | |
|
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409 dostrfree(text); |
| 15 | 410 complain_fail(); |
| 411 } | |
| 412 | |
| 413 static | |
| 414 void | |
|
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415 d_line(struct place *p, struct place *p2, char *line) |
| 15 | 416 { |
| 103 | 417 (void)p2; |
| 418 (void)line; | |
| 419 | |
| 15 | 420 /* XXX */ |
| 421 complain(p, "Sorry, no #line yet"); | |
| 422 } | |
| 423 | |
| 424 //////////////////////////////////////////////////////////// | |
| 425 // messages | |
| 426 | |
| 427 static | |
| 428 void | |
|
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429 d_warning(struct place *p, struct place *p2, char *line) |
| 15 | 430 { |
| 431 char *msg; | |
| 432 | |
|
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433 msg = macroexpand(p2, line, strlen(line), false); |
| 15 | 434 complain(p, "#warning: %s", msg); |
| 435 if (mode.werror) { | |
| 436 complain_fail(); | |
| 437 } | |
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438 dostrfree(msg); |
| 15 | 439 } |
| 440 | |
| 441 static | |
| 442 void | |
|
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443 d_error(struct place *p, struct place *p2, char *line) |
| 15 | 444 { |
| 445 char *msg; | |
| 446 | |
|
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447 msg = macroexpand(p2, line, strlen(line), false); |
| 15 | 448 complain(p, "#error: %s", msg); |
| 449 complain_fail(); | |
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450 dostrfree(msg); |
| 15 | 451 } |
| 452 | |
| 453 //////////////////////////////////////////////////////////// | |
| 454 // other | |
| 455 | |
| 456 static | |
| 457 void | |
|
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458 d_pragma(struct place *p, struct place *p2, char *line) |
| 15 | 459 { |
| 103 | 460 (void)p2; |
| 461 | |
| 15 | 462 complain(p, "#pragma %s", line); |
| 463 complain_fail(); | |
| 464 } | |
| 465 | |
| 466 //////////////////////////////////////////////////////////// | |
| 467 // directive table | |
| 468 | |
| 469 static const struct { | |
| 470 const char *name; | |
| 471 bool ifskip; | |
|
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472 void (*func)(struct place *, struct place *, char *line); |
| 15 | 473 } directives[] = { |
| 474 { "define", true, d_define }, | |
| 475 { "elif", false, d_elif }, | |
| 476 { "else", false, d_else }, | |
| 477 { "endif", false, d_endif }, | |
| 478 { "error", true, d_error }, | |
| 479 { "if", false, d_if }, | |
| 480 { "ifdef", false, d_ifdef }, | |
| 481 { "ifndef", false, d_ifndef }, | |
| 482 { "include", true, d_include }, | |
| 483 { "line", true, d_line }, | |
| 484 { "pragma", true, d_pragma }, | |
| 485 { "undef", true, d_undef }, | |
| 486 { "warning", true, d_warning }, | |
| 487 }; | |
| 488 static const unsigned numdirectives = HOWMANY(directives); | |
| 489 | |
| 490 static | |
| 491 void | |
|
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492 directive_gotdirective(struct place *p, char *line) |
| 15 | 493 { |
| 494 struct place p2; | |
| 495 size_t len, skip; | |
| 496 unsigned i; | |
| 497 | |
| 498 p2 = *p; | |
| 499 for (i=0; i<numdirectives; i++) { | |
| 500 len = strlen(directives[i].name); | |
| 501 if (!strncmp(line, directives[i].name, len) && | |
| 502 strchr(ws, line[len])) { | |
| 503 if (directives[i].ifskip && !ifstate->curtrue) { | |
| 504 return; | |
| 505 } | |
| 506 skip = len + strspn(line+len, ws); | |
| 507 p2.column += skip; | |
| 508 line += skip; | |
|
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509 |
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510 len = strlen(line); |
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511 len = notrailingws(line, len); |
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512 if (len < strlen(line)) { |
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513 line[len] = '\0'; |
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514 } |
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515 directives[i].func(p, &p2, line); |
| 15 | 516 return; |
| 517 } | |
| 518 } | |
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519 /* ugh. allow # by itself, including with a comment after it */ |
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520 uncomment(line); |
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521 if (line[0] == '\0') { |
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522 return; |
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523 } |
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524 |
| 15 | 525 skip = strcspn(line, ws); |
| 526 complain(p, "Unknown directive #%.*s", (int)skip, line); | |
| 527 complain_fail(); | |
| 528 } | |
| 529 | |
|
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530 /* |
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531 * Check for nested comment delimiters in LINE. |
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532 */ |
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533 static |
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534 size_t |
|
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535 directive_scancomments(const struct place *p, char *line, size_t len) |
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536 { |
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537 size_t pos; |
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538 bool incomment; |
|
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539 struct place p2; |
|
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540 |
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541 p2 = *p; |
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542 incomment = 0; |
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543 for (pos = 0; pos+1 < len; pos++) { |
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544 if (line[pos] == '/' && line[pos+1] == '*') { |
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545 if (incomment) { |
|
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546 complain(&p2, "Warning: %c%c within comment", |
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547 '/', '*'); |
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548 if (mode.werror) { |
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549 complain_failed(); |
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550 } |
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551 } else { |
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552 incomment = true; |
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553 } |
| 109 | 554 pos++; |
|
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555 } else if (line[pos] == '*' && line[pos+1] == '/') { |
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556 if (incomment) { |
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557 incomment = false; |
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558 } else { |
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559 /* stray end-comment; should we care? */ |
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560 } |
| 109 | 561 pos++; |
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562 } |
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563 if (line[pos] == '\n') { |
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564 p2.line++; |
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565 p2.column = 0; |
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566 } else { |
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567 p2.column++; |
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568 } |
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569 } |
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570 |
|
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571 /* multiline comments are supposed to arrive in a single buffer */ |
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572 assert(!incomment); |
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573 return len; |
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574 } |
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|
575 |
| 15 | 576 void |
| 577 directive_gotline(struct place *p, char *line, size_t len) | |
| 578 { | |
| 579 size_t skip; | |
| 580 | |
|
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581 if (warns.nestcomment) { |
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582 directive_scancomments(p, line, len); |
|
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583 } |
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584 |
|
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585 /* check if we have a directive line (# exactly in column 0) */ |
|
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586 if (line[0] == '#') { |
|
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587 skip = 1 + strspn(line + 1, ws); |
|
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588 assert(skip <= len); |
| 15 | 589 p->column += skip; |
|
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590 assert(line[len] == '\0'); |
|
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|
591 directive_gotdirective(p, line+skip /*, length = len-skip */); |
|
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592 p->column += len-skip; |
| 15 | 593 } else if (ifstate->curtrue) { |
|
77
123168887da8
Clean out old not-really-working nested comment handling.
David A. Holland
parents:
72
diff
changeset
|
594 macro_sendline(p, line, len); |
|
123168887da8
Clean out old not-really-working nested comment handling.
David A. Holland
parents:
72
diff
changeset
|
595 p->column += len; |
| 15 | 596 } |
| 597 } | |
| 598 | |
| 599 void | |
| 600 directive_goteof(struct place *p) | |
| 601 { | |
| 602 while (ifstate->prev != NULL) { | |
| 603 complain(p, "Missing #endif"); | |
| 604 complain(&ifstate->startplace, "...opened at this point"); | |
| 605 complain_failed(); | |
| 606 ifstate_pop(); | |
| 607 } | |
| 608 macro_sendeof(p); | |
| 609 } | |
| 610 | |
| 611 //////////////////////////////////////////////////////////// | |
| 612 // module initialization | |
| 613 | |
| 614 void | |
| 615 directive_init(void) | |
| 616 { | |
| 617 ifstate = ifstate_create(NULL, NULL, true); | |
| 618 } | |
| 619 | |
| 620 void | |
| 621 directive_cleanup(void) | |
| 622 { | |
| 623 assert(ifstate->prev == NULL); | |
| 624 ifstate_destroy(ifstate); | |
| 625 ifstate = NULL; | |
| 626 } |