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annotate directive.c @ 182:f7814226906c
very minor changes from openbsd
| author | David A. Holland |
|---|---|
| date | Fri, 12 Jun 2015 03:21:36 -0400 |
| parents | a2f047301c15 |
| children | 4c3375895c6e |
| 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> | |
| 173 | 34 #include <limits.h> |
| 165 | 35 #include <errno.h> |
| 15 | 36 |
| 37 #include "utils.h" | |
| 38 #include "mode.h" | |
| 39 #include "place.h" | |
| 40 #include "files.h" | |
| 41 #include "directive.h" | |
| 42 #include "macro.h" | |
| 43 #include "eval.h" | |
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44 #include "output.h" |
| 15 | 45 |
| 46 struct ifstate { | |
| 47 struct ifstate *prev; | |
| 48 struct place startplace; | |
| 49 bool curtrue; | |
| 50 bool evertrue; | |
| 51 bool seenelse; | |
| 52 }; | |
| 53 | |
| 54 static struct ifstate *ifstate; | |
| 55 | |
| 56 //////////////////////////////////////////////////////////// | |
| 57 // common parsing bits | |
| 58 | |
| 59 static | |
| 60 void | |
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61 uncomment(char *buf) |
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62 { |
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63 char *s, *t, *u = NULL; |
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64 bool incomment = false; |
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65 bool inesc = false; |
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66 bool inquote = false; |
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67 char quote = '\0'; |
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68 |
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69 for (s = t = buf; *s; s++) { |
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70 if (incomment) { |
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71 if (s[0] == '*' && s[1] == '/') { |
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72 s++; |
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73 incomment = false; |
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74 } |
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75 } else { |
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76 if (!inquote && s[0] == '/' && s[1] == '*') { |
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77 incomment = true; |
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78 } else { |
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79 if (inesc) { |
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80 inesc = false; |
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81 } else if (s[0] == '\\') { |
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82 inesc = true; |
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83 } else if (!inquote && |
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84 (s[0] == '"' || s[0] == '\'')) { |
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85 inquote = true; |
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86 quote = s[0]; |
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87 } else if (inquote && s[0] == quote) { |
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88 inquote = false; |
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89 } |
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90 |
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91 if (t != s) { |
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92 *t = *s; |
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93 } |
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94 if (!strchr(ws, *t)) { |
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95 u = t; |
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96 } |
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97 t++; |
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98 } |
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99 } |
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100 } |
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101 if (u) { |
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102 /* end string after last non-whitespace char */ |
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103 u[1] = '\0'; |
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104 } else { |
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105 *t = '\0'; |
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106 } |
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107 } |
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108 |
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109 static |
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110 void |
| 15 | 111 oneword(const char *what, struct place *p2, char *line) |
| 112 { | |
| 113 size_t pos; | |
| 114 | |
| 115 pos = strcspn(line, ws); | |
| 116 if (line[pos] != '\0') { | |
| 117 p2->column += pos; | |
| 118 complain(p2, "Garbage after %s argument", what); | |
| 119 complain_fail(); | |
| 120 line[pos] = '\0'; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 //////////////////////////////////////////////////////////// | |
| 125 // if handling | |
| 126 | |
| 127 static | |
| 128 struct ifstate * | |
| 129 ifstate_create(struct ifstate *prev, struct place *p, bool startstate) | |
| 130 { | |
| 131 struct ifstate *is; | |
| 132 | |
| 133 is = domalloc(sizeof(*is)); | |
| 134 is->prev = prev; | |
| 135 if (p != NULL) { | |
| 136 is->startplace = *p; | |
| 137 } else { | |
| 138 place_setbuiltin(&is->startplace, 1); | |
| 139 } | |
| 140 is->curtrue = startstate; | |
| 141 is->evertrue = is->curtrue; | |
| 142 is->seenelse = false; | |
| 143 return is; | |
| 144 } | |
| 145 | |
| 146 static | |
| 147 void | |
| 148 ifstate_destroy(struct ifstate *is) | |
| 149 { | |
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150 dofree(is, sizeof(*is)); |
| 15 | 151 } |
| 152 | |
| 153 static | |
| 154 void | |
| 155 ifstate_push(struct place *p, bool startstate) | |
| 156 { | |
| 72 | 157 struct ifstate *newstate; |
| 158 | |
| 159 newstate = ifstate_create(ifstate, p, startstate); | |
| 160 if (!ifstate->curtrue) { | |
| 161 newstate->curtrue = false; | |
| 162 newstate->evertrue = true; | |
| 163 } | |
| 164 ifstate = newstate; | |
| 15 | 165 } |
| 166 | |
| 167 static | |
| 168 void | |
| 169 ifstate_pop(void) | |
| 170 { | |
| 171 struct ifstate *is; | |
| 172 | |
| 173 is = ifstate; | |
| 174 ifstate = ifstate->prev; | |
| 175 ifstate_destroy(is); | |
| 176 } | |
| 177 | |
| 178 static | |
| 179 void | |
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180 d_if(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 181 { |
| 182 char *expr; | |
| 183 bool val; | |
| 16 | 184 struct place p3 = *p2; |
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185 size_t oldlen; |
| 15 | 186 |
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187 expr = macroexpand(p2, line, strlen(line), true); |
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188 |
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189 oldlen = strlen(expr); |
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190 uncomment(expr); |
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191 /* trim to fit, so the malloc debugging won't complain */ |
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192 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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193 |
| 127 | 194 if (ifstate->curtrue) { |
| 195 val = eval(&p3, expr); | |
| 196 } else { | |
| 197 val = 0; | |
| 198 } | |
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199 ifstate_push(&lp->current, val); |
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200 dostrfree(expr); |
| 15 | 201 } |
| 202 | |
| 203 static | |
| 204 void | |
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205 d_ifdef(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 206 { |
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207 uncomment(line); |
| 15 | 208 oneword("#ifdef", p2, line); |
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209 ifstate_push(&lp->current, macro_isdefined(line)); |
| 15 | 210 } |
| 211 | |
| 212 static | |
| 213 void | |
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214 d_ifndef(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 215 { |
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216 uncomment(line); |
| 15 | 217 oneword("#ifndef", p2, line); |
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218 ifstate_push(&lp->current, !macro_isdefined(line)); |
| 15 | 219 } |
| 220 | |
| 221 static | |
| 222 void | |
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223 d_elif(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 224 { |
| 225 char *expr; | |
| 16 | 226 struct place p3 = *p2; |
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227 size_t oldlen; |
| 15 | 228 |
| 229 if (ifstate->seenelse) { | |
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230 complain(&lp->current, "#elif after #else"); |
| 15 | 231 complain_fail(); |
| 232 } | |
| 233 | |
| 234 if (ifstate->evertrue) { | |
| 235 ifstate->curtrue = false; | |
| 236 } else { | |
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237 expr = macroexpand(p2, line, strlen(line), true); |
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238 |
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239 oldlen = strlen(expr); |
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240 uncomment(expr); |
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241 /* trim to fit, so the malloc debugging won't complain */ |
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242 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1); |
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243 |
| 16 | 244 ifstate->curtrue = eval(&p3, expr); |
| 15 | 245 ifstate->evertrue = ifstate->curtrue; |
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246 dostrfree(expr); |
| 15 | 247 } |
| 248 } | |
| 249 | |
| 250 static | |
| 251 void | |
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252 d_else(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 253 { |
| 103 | 254 (void)p2; |
| 255 (void)line; | |
| 256 | |
| 15 | 257 if (ifstate->seenelse) { |
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258 complain(&lp->current, |
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259 "Multiple #else directives in one conditional"); |
| 15 | 260 complain_fail(); |
| 261 } | |
| 262 | |
| 263 ifstate->curtrue = !ifstate->evertrue; | |
| 264 ifstate->evertrue = true; | |
| 265 ifstate->seenelse = true; | |
| 266 } | |
| 267 | |
| 268 static | |
| 269 void | |
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270 d_endif(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 271 { |
| 103 | 272 (void)p2; |
| 273 (void)line; | |
| 274 | |
| 15 | 275 if (ifstate->prev == NULL) { |
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276 complain(&lp->current, "Unmatched #endif"); |
| 15 | 277 complain_fail(); |
| 278 } else { | |
| 279 ifstate_pop(); | |
| 280 } | |
| 281 } | |
| 282 | |
| 283 //////////////////////////////////////////////////////////// | |
| 284 // macros | |
| 285 | |
| 286 static | |
| 287 void | |
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288 d_define(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 289 { |
| 18 | 290 size_t pos, argpos; |
| 291 struct place p3, p4; | |
| 15 | 292 |
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293 (void)lp; |
| 103 | 294 |
| 15 | 295 /* |
| 296 * line may be: | |
| 297 * macro expansion | |
| 298 * macro(arg, arg, ...) expansion | |
| 299 */ | |
| 300 | |
| 301 pos = strcspn(line, " \t\f\v("); | |
| 302 if (line[pos] == '(') { | |
| 18 | 303 line[pos++] = '\0'; |
| 304 argpos = pos; | |
| 15 | 305 pos = pos + strcspn(line+pos, "()"); |
| 306 if (line[pos] == '(') { | |
| 307 p2->column += pos; | |
| 308 complain(p2, "Left parenthesis in macro parameters"); | |
| 309 complain_fail(); | |
| 310 return; | |
| 311 } | |
| 312 if (line[pos] != ')') { | |
| 313 p2->column += pos; | |
| 314 complain(p2, "Unclosed macro parameter list"); | |
| 315 complain_fail(); | |
| 316 return; | |
| 317 } | |
| 18 | 318 line[pos++] = '\0'; |
|
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319 #if 0 |
| 15 | 320 if (!strchr(ws, line[pos])) { |
| 321 p2->column += pos; | |
| 322 complain(p2, "Trash after macro parameter list"); | |
| 323 complain_fail(); | |
| 324 return; | |
| 325 } | |
|
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326 #endif |
| 15 | 327 } else if (line[pos] == '\0') { |
| 18 | 328 argpos = 0; |
| 15 | 329 } else { |
| 330 line[pos++] = '\0'; | |
| 18 | 331 argpos = 0; |
| 15 | 332 } |
| 333 | |
| 334 pos += strspn(line+pos, ws); | |
| 335 | |
| 336 p3 = *p2; | |
| 18 | 337 p3.column += argpos; |
| 338 | |
| 339 p4 = *p2; | |
| 340 p4.column += pos; | |
| 341 | |
| 342 if (argpos) { | |
| 343 macro_define_params(p2, line, &p3, | |
| 344 line + argpos, &p4, | |
| 345 line + pos); | |
| 346 } else { | |
| 347 macro_define_plain(p2, line, &p4, line + pos); | |
| 348 } | |
| 15 | 349 } |
| 350 | |
| 351 static | |
| 352 void | |
|
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353 d_undef(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 354 { |
|
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355 (void)lp; |
| 103 | 356 |
|
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357 uncomment(line); |
| 15 | 358 oneword("#undef", p2, line); |
| 359 macro_undef(line); | |
| 360 } | |
| 361 | |
| 362 //////////////////////////////////////////////////////////// | |
| 363 // includes | |
| 364 | |
| 365 static | |
| 366 bool | |
|
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367 tryinclude(struct place *p, char *line) |
| 15 | 368 { |
|
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369 size_t len; |
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370 |
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371 len = strlen(line); |
| 15 | 372 if (len > 2 && line[0] == '"' && line[len-1] == '"') { |
| 373 line[len-1] = '\0'; | |
| 374 file_readquote(p, line+1); | |
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375 line[len-1] = '"'; |
| 15 | 376 return true; |
| 377 } | |
| 378 if (len > 2 && line[0] == '<' && line[len-1] == '>') { | |
| 379 line[len-1] = '\0'; | |
| 380 file_readbracket(p, line+1); | |
|
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381 line[len-1] = '>'; |
| 15 | 382 return true; |
| 383 } | |
| 384 return false; | |
| 385 } | |
| 386 | |
| 387 static | |
| 388 void | |
|
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389 d_include(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 390 { |
| 391 char *text; | |
|
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392 size_t oldlen; |
| 15 | 393 |
|
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394 uncomment(line); |
|
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395 if (tryinclude(&lp->current, line)) { |
| 15 | 396 return; |
| 397 } | |
|
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398 text = macroexpand(p2, line, strlen(line), false); |
|
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399 |
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400 oldlen = strlen(text); |
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401 uncomment(text); |
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402 /* trim to fit, so the malloc debugging won't complain */ |
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403 text = dorealloc(text, oldlen + 1, strlen(text) + 1); |
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404 |
|
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405 if (tryinclude(&lp->current, text)) { |
|
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406 dostrfree(text); |
| 15 | 407 return; |
| 408 } | |
|
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409 complain(&lp->current, "Illegal #include directive"); |
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410 complain(&lp->current, "Before macro expansion: #include %s", line); |
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411 complain(&lp->current, "After macro expansion: #include %s", text); |
|
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|
412 dostrfree(text); |
| 15 | 413 complain_fail(); |
| 414 } | |
| 415 | |
| 416 static | |
| 417 void | |
|
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418 d_line(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 419 { |
| 160 | 420 char *text; |
| 421 size_t oldlen; | |
| 165 | 422 unsigned long val; |
| 423 char *moretext; | |
| 424 size_t moretextlen; | |
| 425 char *filename; | |
| 160 | 426 |
| 427 text = macroexpand(p2, line, strlen(line), true); | |
| 428 | |
| 429 oldlen = strlen(text); | |
| 430 uncomment(text); | |
| 431 /* trim to fit, so the malloc debugging won't complain */ | |
| 432 text = dorealloc(text, oldlen + 1, strlen(text) + 1); | |
| 103 | 433 |
| 165 | 434 /* |
| 435 * What we should have here: either 1234 "file.c", | |
| 436 * or just 1234. | |
| 437 */ | |
| 438 | |
| 439 errno = 0; | |
| 440 val = strtoul(text, &moretext, 10); | |
| 441 if (errno) { | |
| 442 complain(&lp->current, "No line number in #line directive"); | |
| 443 goto fail; | |
| 160 | 444 } |
| 165 | 445 #if UINT_MAX < ULONG_MAX |
| 446 if (val > UINT_MAX) { | |
| 447 complain(&lp->current, | |
| 448 "Line number in #line directive too large"); | |
| 449 goto fail; | |
| 160 | 450 } |
| 165 | 451 #endif |
| 452 moretext += strspn(moretext, ws); | |
| 453 moretextlen = strlen(moretext); | |
| 454 lp->current.column += (moretext - text); | |
| 455 | |
| 456 if (moretextlen > 2 && | |
| 457 moretext[0] == '"' && moretext[moretextlen-1] == '"') { | |
| 458 filename = dostrndup(moretext+1, moretextlen-2); | |
|
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|
459 place_changefile(&lp->nextline, filename); |
| 160 | 460 dostrfree(filename); |
| 461 } | |
| 165 | 462 else if (moretextlen > 0) { |
| 463 complain(&lp->current, | |
| 464 "Invalid file name in #line directive"); | |
| 465 goto fail; | |
| 466 } | |
| 467 | |
| 468 lp->nextline.line = val; | |
| 160 | 469 dostrfree(text); |
| 470 return; | |
| 471 | |
| 165 | 472 fail: |
| 473 complain(&lp->current, "Before macro expansion: #line %s", line); | |
| 474 complain(&lp->current, "After macro expansion: #line %s", text); | |
| 475 complain_fail(); | |
| 160 | 476 dostrfree(text); |
| 15 | 477 } |
| 478 | |
| 479 //////////////////////////////////////////////////////////// | |
| 480 // messages | |
| 481 | |
| 482 static | |
| 483 void | |
|
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484 d_warning(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 485 { |
| 486 char *msg; | |
| 487 | |
|
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488 msg = macroexpand(p2, line, strlen(line), false); |
|
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489 complain(&lp->current, "#warning: %s", msg); |
| 15 | 490 if (mode.werror) { |
| 491 complain_fail(); | |
| 492 } | |
|
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493 dostrfree(msg); |
| 15 | 494 } |
| 495 | |
| 496 static | |
| 497 void | |
|
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498 d_error(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 499 { |
| 500 char *msg; | |
| 501 | |
|
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502 msg = macroexpand(p2, line, strlen(line), false); |
|
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503 complain(&lp->current, "#error: %s", msg); |
| 15 | 504 complain_fail(); |
|
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|
505 dostrfree(msg); |
| 15 | 506 } |
| 507 | |
| 508 //////////////////////////////////////////////////////////// | |
| 509 // other | |
| 510 | |
| 511 static | |
| 512 void | |
|
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|
513 d_pragma(struct lineplace *lp, struct place *p2, char *line) |
| 15 | 514 { |
| 103 | 515 (void)p2; |
| 516 | |
|
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|
517 complain(&lp->current, "#pragma %s", line); |
| 15 | 518 complain_fail(); |
| 519 } | |
| 520 | |
| 521 //////////////////////////////////////////////////////////// | |
| 522 // directive table | |
| 523 | |
| 524 static const struct { | |
| 525 const char *name; | |
| 526 bool ifskip; | |
|
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|
527 void (*func)(struct lineplace *, struct place *, char *line); |
| 15 | 528 } directives[] = { |
| 529 { "define", true, d_define }, | |
| 530 { "elif", false, d_elif }, | |
| 531 { "else", false, d_else }, | |
| 532 { "endif", false, d_endif }, | |
| 533 { "error", true, d_error }, | |
| 534 { "if", false, d_if }, | |
| 535 { "ifdef", false, d_ifdef }, | |
| 536 { "ifndef", false, d_ifndef }, | |
| 537 { "include", true, d_include }, | |
| 538 { "line", true, d_line }, | |
| 539 { "pragma", true, d_pragma }, | |
| 540 { "undef", true, d_undef }, | |
| 541 { "warning", true, d_warning }, | |
| 542 }; | |
| 543 static const unsigned numdirectives = HOWMANY(directives); | |
| 544 | |
| 545 static | |
| 546 void | |
|
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|
547 directive_gotdirective(struct lineplace *lp, char *line) |
| 15 | 548 { |
| 549 struct place p2; | |
| 550 size_t len, skip; | |
| 551 unsigned i; | |
| 552 | |
|
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|
553 p2 = lp->current; |
| 15 | 554 for (i=0; i<numdirectives; i++) { |
| 555 len = strlen(directives[i].name); | |
| 556 if (!strncmp(line, directives[i].name, len) && | |
| 557 strchr(ws, line[len])) { | |
| 558 if (directives[i].ifskip && !ifstate->curtrue) { | |
| 559 return; | |
| 560 } | |
| 561 skip = len + strspn(line+len, ws); | |
| 562 p2.column += skip; | |
| 563 line += skip; | |
|
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|
564 |
|
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diff
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|
565 len = strlen(line); |
|
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|
566 len = notrailingws(line, len); |
|
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567 if (len < strlen(line)) { |
|
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|
568 line[len] = '\0'; |
|
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|
569 } |
|
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|
570 directives[i].func(lp, &p2, line); |
| 15 | 571 return; |
| 572 } | |
| 573 } | |
|
83
3e505c16b0b0
Accept # by itself, including with a comment after it.
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diff
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|
574 /* ugh. allow # by itself, including with a comment after it */ |
|
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diff
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|
575 uncomment(line); |
|
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diff
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|
576 if (line[0] == '\0') { |
|
3e505c16b0b0
Accept # by itself, including with a comment after it.
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diff
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|
577 return; |
|
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Accept # by itself, including with a comment after it.
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diff
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|
578 } |
|
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diff
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|
579 |
| 15 | 580 skip = strcspn(line, ws); |
|
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|
581 complain(&lp->current, "Unknown directive #%.*s", (int)skip, line); |
| 15 | 582 complain_fail(); |
| 583 } | |
| 584 | |
|
49
8a204d153398
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diff
changeset
|
585 /* |
|
77
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|
586 * Check for nested comment delimiters in LINE. |
|
49
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|
587 */ |
|
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|
588 static |
|
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diff
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|
589 size_t |
|
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|
590 directive_scancomments(const struct lineplace *lp, char *line, size_t len) |
|
49
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diff
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|
591 { |
|
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|
592 size_t pos; |
|
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|
593 bool incomment; |
|
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diff
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|
594 struct place p2; |
|
49
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|
595 |
|
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|
596 p2 = lp->current; |
|
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diff
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|
597 incomment = 0; |
|
49
8a204d153398
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diff
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|
598 for (pos = 0; pos+1 < len; pos++) { |
|
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diff
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|
599 if (line[pos] == '/' && line[pos+1] == '*') { |
|
8a204d153398
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diff
changeset
|
600 if (incomment) { |
|
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|
601 complain(&p2, "Warning: %c%c within comment", |
|
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diff
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|
602 '/', '*'); |
|
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diff
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|
603 if (mode.werror) { |
|
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|
604 complain_failed(); |
|
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|
605 } |
|
49
8a204d153398
Intercept multiline comments earlier. Leave same-line comments alone.
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diff
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|
606 } else { |
|
8a204d153398
Intercept multiline comments earlier. Leave same-line comments alone.
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diff
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|
607 incomment = true; |
|
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diff
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|
608 } |
| 109 | 609 pos++; |
|
49
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diff
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|
610 } else if (line[pos] == '*' && line[pos+1] == '/') { |
|
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diff
changeset
|
611 if (incomment) { |
|
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diff
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|
612 incomment = false; |
|
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diff
changeset
|
613 } else { |
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614 /* stray end-comment; should we care? */ |
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615 } |
| 109 | 616 pos++; |
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617 } |
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618 if (line[pos] == '\n') { |
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619 p2.line++; |
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620 p2.column = 0; |
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621 } else { |
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622 p2.column++; |
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623 } |
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624 } |
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625 |
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626 /* multiline comments are supposed to arrive in a single buffer */ |
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627 assert(!incomment); |
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628 return len; |
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629 } |
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630 |
| 15 | 631 void |
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632 directive_gotline(struct lineplace *lp, char *line, size_t len) |
| 15 | 633 { |
| 634 size_t skip; | |
| 635 | |
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636 if (warns.nestcomment) { |
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637 directive_scancomments(lp, line, len); |
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638 } |
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639 |
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640 /* check if we have a directive line (# exactly in column 0) */ |
| 175 | 641 if (len > 0 && line[0] == '#') { |
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642 skip = 1 + strspn(line + 1, ws); |
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643 assert(skip <= len); |
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644 lp->current.column += skip; |
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645 assert(line[len] == '\0'); |
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646 directive_gotdirective(lp, line+skip /*, length = len-skip */); |
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647 lp->current.column += len-skip; |
| 15 | 648 } else if (ifstate->curtrue) { |
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649 macro_sendline(&lp->current, line, len); |
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650 lp->current.column += len; |
| 15 | 651 } |
| 652 } | |
| 653 | |
| 654 void | |
| 655 directive_goteof(struct place *p) | |
| 656 { | |
| 657 while (ifstate->prev != NULL) { | |
| 658 complain(p, "Missing #endif"); | |
| 659 complain(&ifstate->startplace, "...opened at this point"); | |
| 660 complain_failed(); | |
| 661 ifstate_pop(); | |
| 662 } | |
| 663 macro_sendeof(p); | |
| 664 } | |
| 665 | |
| 666 //////////////////////////////////////////////////////////// | |
| 667 // module initialization | |
| 668 | |
| 669 void | |
| 670 directive_init(void) | |
| 671 { | |
| 672 ifstate = ifstate_create(NULL, NULL, true); | |
| 673 } | |
| 674 | |
| 675 void | |
| 676 directive_cleanup(void) | |
| 677 { | |
| 678 assert(ifstate->prev == NULL); | |
| 679 ifstate_destroy(ifstate); | |
| 680 ifstate = NULL; | |
| 681 } |