Mercurial > ~dholland > hg > tradcpp > index.cgi
annotate directive.c @ 106:ecec7c16e3ba
add a couple more tests, taken from the 2010 tech-toolchain thread
(one was from der Mouse, the other prompted by something he said)
| author | David A. Holland |
|---|---|
| date | Tue, 11 Jun 2013 11:35:27 -0400 |
| parents | 343af355df1b |
| children | 4483a14ee101 |
| 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 |
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66 for (s = t = buf; *s; s++) { |
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67 if (incomment) { |
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68 if (s[0] == '*' && s[1] == '/') { |
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69 s++; |
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70 incomment = false; |
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71 } |
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72 } else { |
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73 if (!inquote && s[0] == '/' && s[1] == '*') { |
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74 incomment = true; |
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75 } else { |
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76 if (inesc) { |
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77 inesc = false; |
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78 } else if (s[0] == '\\') { |
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79 inesc = true; |
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80 } else if (s[0] == '"') { |
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81 inquote = !inquote; |
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82 } |
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83 |
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84 if (t != s) { |
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85 *t = *s; |
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86 } |
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87 if (!strchr(ws, *t)) { |
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88 u = t; |
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89 } |
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90 t++; |
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91 } |
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92 } |
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93 } |
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94 if (u) { |
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95 /* end string after last non-whitespace char */ |
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96 u[1] = '\0'; |
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97 } else { |
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98 *t = '\0'; |
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99 } |
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100 } |
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101 |
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102 static |
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103 void |
| 15 | 104 oneword(const char *what, struct place *p2, char *line) |
| 105 { | |
| 106 size_t pos; | |
| 107 | |
| 108 pos = strcspn(line, ws); | |
| 109 if (line[pos] != '\0') { | |
| 110 p2->column += pos; | |
| 111 complain(p2, "Garbage after %s argument", what); | |
| 112 complain_fail(); | |
| 113 line[pos] = '\0'; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 //////////////////////////////////////////////////////////// | |
| 118 // if handling | |
| 119 | |
| 120 static | |
| 121 struct ifstate * | |
| 122 ifstate_create(struct ifstate *prev, struct place *p, bool startstate) | |
| 123 { | |
| 124 struct ifstate *is; | |
| 125 | |
| 126 is = domalloc(sizeof(*is)); | |
| 127 is->prev = prev; | |
| 128 if (p != NULL) { | |
| 129 is->startplace = *p; | |
| 130 } else { | |
| 131 place_setbuiltin(&is->startplace, 1); | |
| 132 } | |
| 133 is->curtrue = startstate; | |
| 134 is->evertrue = is->curtrue; | |
| 135 is->seenelse = false; | |
| 136 return is; | |
| 137 } | |
| 138 | |
| 139 static | |
| 140 void | |
| 141 ifstate_destroy(struct ifstate *is) | |
| 142 { | |
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143 dofree(is, sizeof(*is)); |
| 15 | 144 } |
| 145 | |
| 146 static | |
| 147 void | |
| 148 ifstate_push(struct place *p, bool startstate) | |
| 149 { | |
| 72 | 150 struct ifstate *newstate; |
| 151 | |
| 152 newstate = ifstate_create(ifstate, p, startstate); | |
| 153 if (!ifstate->curtrue) { | |
| 154 newstate->curtrue = false; | |
| 155 newstate->evertrue = true; | |
| 156 } | |
| 157 ifstate = newstate; | |
| 15 | 158 } |
| 159 | |
| 160 static | |
| 161 void | |
| 162 ifstate_pop(void) | |
| 163 { | |
| 164 struct ifstate *is; | |
| 165 | |
| 166 is = ifstate; | |
| 167 ifstate = ifstate->prev; | |
| 168 ifstate_destroy(is); | |
| 169 } | |
| 170 | |
| 171 static | |
| 172 void | |
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173 d_if(struct place *p, struct place *p2, char *line) |
| 15 | 174 { |
| 175 char *expr; | |
| 176 bool val; | |
| 16 | 177 struct place p3 = *p2; |
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178 size_t oldlen; |
| 15 | 179 |
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180 expr = macroexpand(p2, line, strlen(line), true); |
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181 |
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182 oldlen = strlen(expr); |
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183 uncomment(expr); |
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184 /* trim to fit, so the malloc debugging won't complain */ |
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185 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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186 |
| 16 | 187 val = eval(&p3, expr); |
| 15 | 188 ifstate_push(p, val); |
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189 dostrfree(expr); |
| 15 | 190 } |
| 191 | |
| 192 static | |
| 193 void | |
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194 d_ifdef(struct place *p, struct place *p2, char *line) |
| 15 | 195 { |
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196 uncomment(line); |
| 15 | 197 oneword("#ifdef", p2, line); |
| 198 ifstate_push(p, macro_isdefined(line)); | |
| 199 } | |
| 200 | |
| 201 static | |
| 202 void | |
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203 d_ifndef(struct place *p, struct place *p2, char *line) |
| 15 | 204 { |
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205 uncomment(line); |
| 15 | 206 oneword("#ifndef", p2, line); |
| 207 ifstate_push(p, !macro_isdefined(line)); | |
| 208 } | |
| 209 | |
| 210 static | |
| 211 void | |
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212 d_elif(struct place *p, struct place *p2, char *line) |
| 15 | 213 { |
| 214 char *expr; | |
| 16 | 215 struct place p3 = *p2; |
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216 size_t oldlen; |
| 15 | 217 |
| 218 if (ifstate->seenelse) { | |
| 219 complain(p, "#elif after #else"); | |
| 220 complain_fail(); | |
| 221 } | |
| 222 | |
| 223 if (ifstate->evertrue) { | |
| 224 ifstate->curtrue = false; | |
| 225 } else { | |
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226 expr = macroexpand(p2, line, strlen(line), true); |
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227 |
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228 oldlen = strlen(expr); |
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229 uncomment(expr); |
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230 /* trim to fit, so the malloc debugging won't complain */ |
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231 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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232 |
| 16 | 233 ifstate->curtrue = eval(&p3, expr); |
| 15 | 234 ifstate->evertrue = ifstate->curtrue; |
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235 dostrfree(expr); |
| 15 | 236 } |
| 237 } | |
| 238 | |
| 239 static | |
| 240 void | |
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241 d_else(struct place *p, struct place *p2, char *line) |
| 15 | 242 { |
| 103 | 243 (void)p2; |
| 244 (void)line; | |
| 245 | |
| 15 | 246 if (ifstate->seenelse) { |
| 247 complain(p, "Multiple #else directives in one conditional"); | |
| 248 complain_fail(); | |
| 249 } | |
| 250 | |
| 251 ifstate->curtrue = !ifstate->evertrue; | |
| 252 ifstate->evertrue = true; | |
| 253 ifstate->seenelse = true; | |
| 254 } | |
| 255 | |
| 256 static | |
| 257 void | |
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258 d_endif(struct place *p, struct place *p2, char *line) |
| 15 | 259 { |
| 103 | 260 (void)p2; |
| 261 (void)line; | |
| 262 | |
| 15 | 263 if (ifstate->prev == NULL) { |
| 264 complain(p, "Unmatched #endif"); | |
| 265 complain_fail(); | |
| 266 } else { | |
| 267 ifstate_pop(); | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 //////////////////////////////////////////////////////////// | |
| 272 // macros | |
| 273 | |
| 274 static | |
| 275 void | |
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276 d_define(struct place *p, struct place *p2, char *line) |
| 15 | 277 { |
| 18 | 278 size_t pos, argpos; |
| 279 struct place p3, p4; | |
| 15 | 280 |
| 103 | 281 (void)p; |
| 282 | |
| 15 | 283 /* |
| 284 * line may be: | |
| 285 * macro expansion | |
| 286 * macro(arg, arg, ...) expansion | |
| 287 */ | |
| 288 | |
| 289 pos = strcspn(line, " \t\f\v("); | |
| 290 if (line[pos] == '(') { | |
| 18 | 291 line[pos++] = '\0'; |
| 292 argpos = pos; | |
| 15 | 293 pos = pos + strcspn(line+pos, "()"); |
| 294 if (line[pos] == '(') { | |
| 295 p2->column += pos; | |
| 296 complain(p2, "Left parenthesis in macro parameters"); | |
| 297 complain_fail(); | |
| 298 return; | |
| 299 } | |
| 300 if (line[pos] != ')') { | |
| 301 p2->column += pos; | |
| 302 complain(p2, "Unclosed macro parameter list"); | |
| 303 complain_fail(); | |
| 304 return; | |
| 305 } | |
| 18 | 306 line[pos++] = '\0'; |
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307 #if 0 |
| 15 | 308 if (!strchr(ws, line[pos])) { |
| 309 p2->column += pos; | |
| 310 complain(p2, "Trash after macro parameter list"); | |
| 311 complain_fail(); | |
| 312 return; | |
| 313 } | |
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314 #endif |
| 15 | 315 } else if (line[pos] == '\0') { |
| 18 | 316 argpos = 0; |
| 15 | 317 } else { |
| 318 line[pos++] = '\0'; | |
| 18 | 319 argpos = 0; |
| 15 | 320 } |
| 321 | |
| 322 pos += strspn(line+pos, ws); | |
| 323 | |
| 324 p3 = *p2; | |
| 18 | 325 p3.column += argpos; |
| 326 | |
| 327 p4 = *p2; | |
| 328 p4.column += pos; | |
| 329 | |
| 330 if (argpos) { | |
| 331 macro_define_params(p2, line, &p3, | |
| 332 line + argpos, &p4, | |
| 333 line + pos); | |
| 334 } else { | |
| 335 macro_define_plain(p2, line, &p4, line + pos); | |
| 336 } | |
| 15 | 337 } |
| 338 | |
| 339 static | |
| 340 void | |
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341 d_undef(struct place *p, struct place *p2, char *line) |
| 15 | 342 { |
| 103 | 343 (void)p; |
| 344 | |
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345 uncomment(line); |
| 15 | 346 oneword("#undef", p2, line); |
| 347 macro_undef(line); | |
| 348 } | |
| 349 | |
| 350 //////////////////////////////////////////////////////////// | |
| 351 // includes | |
| 352 | |
| 353 static | |
| 354 bool | |
|
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355 tryinclude(struct place *p, char *line) |
| 15 | 356 { |
|
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357 size_t len; |
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358 |
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359 len = strlen(line); |
| 15 | 360 if (len > 2 && line[0] == '"' && line[len-1] == '"') { |
| 361 line[len-1] = '\0'; | |
| 362 file_readquote(p, line+1); | |
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363 line[len-1] = '"'; |
| 15 | 364 return true; |
| 365 } | |
| 366 if (len > 2 && line[0] == '<' && line[len-1] == '>') { | |
| 367 line[len-1] = '\0'; | |
| 368 file_readbracket(p, line+1); | |
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369 line[len-1] = '>'; |
| 15 | 370 return true; |
| 371 } | |
| 372 return false; | |
| 373 } | |
| 374 | |
| 375 static | |
| 376 void | |
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377 d_include(struct place *p, struct place *p2, char *line) |
| 15 | 378 { |
| 379 char *text; | |
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380 size_t oldlen; |
| 15 | 381 |
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382 uncomment(line); |
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383 if (tryinclude(p, line)) { |
| 15 | 384 return; |
| 385 } | |
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386 text = macroexpand(p2, line, strlen(line), false); |
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387 |
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388 oldlen = strlen(text); |
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389 uncomment(text); |
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390 /* trim to fit, so the malloc debugging won't complain */ |
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391 text = dorealloc(text, oldlen + 1, strlen(text) + 1); |
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392 |
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393 if (tryinclude(p, text)) { |
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394 dostrfree(text); |
| 15 | 395 return; |
| 396 } | |
| 90 | 397 complain(p, "Illegal #include directive"); |
| 398 complain(p, "Before macro expansion: #include %s", line); | |
| 399 complain(p, "After macro expansion: #include %s", text); | |
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400 dostrfree(text); |
| 15 | 401 complain_fail(); |
| 402 } | |
| 403 | |
| 404 static | |
| 405 void | |
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406 d_line(struct place *p, struct place *p2, char *line) |
| 15 | 407 { |
| 103 | 408 (void)p2; |
| 409 (void)line; | |
| 410 | |
| 15 | 411 /* XXX */ |
| 412 complain(p, "Sorry, no #line yet"); | |
| 413 } | |
| 414 | |
| 415 //////////////////////////////////////////////////////////// | |
| 416 // messages | |
| 417 | |
| 418 static | |
| 419 void | |
|
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420 d_warning(struct place *p, struct place *p2, char *line) |
| 15 | 421 { |
| 422 char *msg; | |
| 423 | |
|
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424 msg = macroexpand(p2, line, strlen(line), false); |
| 15 | 425 complain(p, "#warning: %s", msg); |
| 426 if (mode.werror) { | |
| 427 complain_fail(); | |
| 428 } | |
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429 dostrfree(msg); |
| 15 | 430 } |
| 431 | |
| 432 static | |
| 433 void | |
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434 d_error(struct place *p, struct place *p2, char *line) |
| 15 | 435 { |
| 436 char *msg; | |
| 437 | |
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438 msg = macroexpand(p2, line, strlen(line), false); |
| 15 | 439 complain(p, "#error: %s", msg); |
| 440 complain_fail(); | |
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441 dostrfree(msg); |
| 15 | 442 } |
| 443 | |
| 444 //////////////////////////////////////////////////////////// | |
| 445 // other | |
| 446 | |
| 447 static | |
| 448 void | |
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449 d_pragma(struct place *p, struct place *p2, char *line) |
| 15 | 450 { |
| 103 | 451 (void)p2; |
| 452 | |
| 15 | 453 complain(p, "#pragma %s", line); |
| 454 complain_fail(); | |
| 455 } | |
| 456 | |
| 457 //////////////////////////////////////////////////////////// | |
| 458 // directive table | |
| 459 | |
| 460 static const struct { | |
| 461 const char *name; | |
| 462 bool ifskip; | |
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463 void (*func)(struct place *, struct place *, char *line); |
| 15 | 464 } directives[] = { |
| 465 { "define", true, d_define }, | |
| 466 { "elif", false, d_elif }, | |
| 467 { "else", false, d_else }, | |
| 468 { "endif", false, d_endif }, | |
| 469 { "error", true, d_error }, | |
| 470 { "if", false, d_if }, | |
| 471 { "ifdef", false, d_ifdef }, | |
| 472 { "ifndef", false, d_ifndef }, | |
| 473 { "include", true, d_include }, | |
| 474 { "line", true, d_line }, | |
| 475 { "pragma", true, d_pragma }, | |
| 476 { "undef", true, d_undef }, | |
| 477 { "warning", true, d_warning }, | |
| 478 }; | |
| 479 static const unsigned numdirectives = HOWMANY(directives); | |
| 480 | |
| 481 static | |
| 482 void | |
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483 directive_gotdirective(struct place *p, char *line) |
| 15 | 484 { |
| 485 struct place p2; | |
| 486 size_t len, skip; | |
| 487 unsigned i; | |
| 488 | |
| 489 p2 = *p; | |
| 490 for (i=0; i<numdirectives; i++) { | |
| 491 len = strlen(directives[i].name); | |
| 492 if (!strncmp(line, directives[i].name, len) && | |
| 493 strchr(ws, line[len])) { | |
| 494 if (directives[i].ifskip && !ifstate->curtrue) { | |
| 495 return; | |
| 496 } | |
| 497 skip = len + strspn(line+len, ws); | |
| 498 p2.column += skip; | |
| 499 line += skip; | |
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500 |
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501 len = strlen(line); |
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502 len = notrailingws(line, len); |
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503 if (len < strlen(line)) { |
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504 line[len] = '\0'; |
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505 } |
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506 directives[i].func(p, &p2, line); |
| 15 | 507 return; |
| 508 } | |
| 509 } | |
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510 /* ugh. allow # by itself, including with a comment after it */ |
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511 uncomment(line); |
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512 if (line[0] == '\0') { |
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513 return; |
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514 } |
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515 |
| 15 | 516 skip = strcspn(line, ws); |
| 517 complain(p, "Unknown directive #%.*s", (int)skip, line); | |
| 518 complain_fail(); | |
| 519 } | |
| 520 | |
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521 /* |
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522 * Check for nested comment delimiters in LINE. |
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523 */ |
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524 static |
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525 size_t |
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526 directive_scancomments(const struct place *p, char *line, size_t len) |
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527 { |
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528 size_t pos; |
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529 bool incomment; |
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530 struct place p2; |
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531 |
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532 p2 = *p; |
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533 incomment = 0; |
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534 for (pos = 0; pos+1 < len; pos++) { |
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535 if (line[pos] == '/' && line[pos+1] == '*') { |
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536 if (incomment) { |
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537 complain(&p2, "Warning: %c%c within comment", |
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538 '/', '*'); |
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539 if (mode.werror) { |
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540 complain_failed(); |
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541 } |
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542 } else { |
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543 incomment = true; |
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544 } |
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545 } else if (line[pos] == '*' && line[pos+1] == '/') { |
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546 if (incomment) { |
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547 incomment = false; |
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548 } else { |
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549 /* stray end-comment; should we care? */ |
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550 } |
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551 } |
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552 if (line[pos] == '\n') { |
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553 p2.line++; |
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554 p2.column = 0; |
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555 } else { |
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556 p2.column++; |
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557 } |
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558 } |
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559 |
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560 /* multiline comments are supposed to arrive in a single buffer */ |
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561 assert(!incomment); |
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562 return len; |
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563 } |
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564 |
| 15 | 565 void |
| 566 directive_gotline(struct place *p, char *line, size_t len) | |
| 567 { | |
| 568 size_t skip; | |
| 569 | |
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570 if (warns.nestcomment) { |
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571 directive_scancomments(p, line, len); |
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572 } |
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573 |
|
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574 /* check if we have a directive line (# exactly in column 0) */ |
|
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575 if (line[0] == '#') { |
|
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576 skip = 1 + strspn(line + 1, ws); |
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577 assert(skip <= len); |
| 15 | 578 p->column += skip; |
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579 assert(line[len] == '\0'); |
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580 directive_gotdirective(p, line+skip /*, length = len-skip */); |
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581 p->column += len-skip; |
| 15 | 582 } else if (ifstate->curtrue) { |
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583 macro_sendline(p, line, len); |
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584 p->column += len; |
| 15 | 585 } |
| 586 } | |
| 587 | |
| 588 void | |
| 589 directive_goteof(struct place *p) | |
| 590 { | |
| 591 while (ifstate->prev != NULL) { | |
| 592 complain(p, "Missing #endif"); | |
| 593 complain(&ifstate->startplace, "...opened at this point"); | |
| 594 complain_failed(); | |
| 595 ifstate_pop(); | |
| 596 } | |
| 597 macro_sendeof(p); | |
| 598 } | |
| 599 | |
| 600 //////////////////////////////////////////////////////////// | |
| 601 // module initialization | |
| 602 | |
| 603 void | |
| 604 directive_init(void) | |
| 605 { | |
| 606 ifstate = ifstate_create(NULL, NULL, true); | |
| 607 } | |
| 608 | |
| 609 void | |
| 610 directive_cleanup(void) | |
| 611 { | |
| 612 assert(ifstate->prev == NULL); | |
| 613 ifstate_destroy(ifstate); | |
| 614 ifstate = NULL; | |
| 615 } |