Mercurial > ~dholland > hg > tradcpp > index.cgi
annotate directive.c @ 62:90c6052410ce
Don't truncate the candidate include path strings.
It causes malloc debug assertions.
| author | David A. Holland |
|---|---|
| date | Sun, 31 Mar 2013 01:27:46 -0400 |
| parents | 8a204d153398 |
| children | f50b4ea6cbfe |
| rev | line source |
|---|---|
| 30 | 1 /*- |
| 2 * Copyright (c) 2010 The NetBSD Foundation, Inc. | |
| 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; | |
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53 static bool in_multiline_comment; |
| 15 | 54 |
| 55 //////////////////////////////////////////////////////////// | |
| 56 // common parsing bits | |
| 57 | |
| 58 static | |
| 59 void | |
| 60 oneword(const char *what, struct place *p2, char *line) | |
| 61 { | |
| 62 size_t pos; | |
| 63 | |
| 64 pos = strcspn(line, ws); | |
| 65 if (line[pos] != '\0') { | |
| 66 p2->column += pos; | |
| 67 complain(p2, "Garbage after %s argument", what); | |
| 68 complain_fail(); | |
| 69 line[pos] = '\0'; | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 //////////////////////////////////////////////////////////// | |
| 74 // if handling | |
| 75 | |
| 76 static | |
| 77 struct ifstate * | |
| 78 ifstate_create(struct ifstate *prev, struct place *p, bool startstate) | |
| 79 { | |
| 80 struct ifstate *is; | |
| 81 | |
| 82 is = domalloc(sizeof(*is)); | |
| 83 is->prev = prev; | |
| 84 if (p != NULL) { | |
| 85 is->startplace = *p; | |
| 86 } else { | |
| 87 place_setbuiltin(&is->startplace, 1); | |
| 88 } | |
| 89 is->curtrue = startstate; | |
| 90 is->evertrue = is->curtrue; | |
| 91 is->seenelse = false; | |
| 92 return is; | |
| 93 } | |
| 94 | |
| 95 static | |
| 96 void | |
| 97 ifstate_destroy(struct ifstate *is) | |
| 98 { | |
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99 dofree(is, sizeof(*is)); |
| 15 | 100 } |
| 101 | |
| 102 static | |
| 103 void | |
| 104 ifstate_push(struct place *p, bool startstate) | |
| 105 { | |
| 106 ifstate = ifstate_create(ifstate, p, startstate); | |
| 107 } | |
| 108 | |
| 109 static | |
| 110 void | |
| 111 ifstate_pop(void) | |
| 112 { | |
| 113 struct ifstate *is; | |
| 114 | |
| 115 is = ifstate; | |
| 116 ifstate = ifstate->prev; | |
| 117 ifstate_destroy(is); | |
| 118 } | |
| 119 | |
| 120 static | |
| 121 void | |
| 122 d_if(struct place *p, struct place *p2, char *line, size_t len) | |
| 123 { | |
| 124 char *expr; | |
| 125 bool val; | |
| 16 | 126 struct place p3 = *p2; |
| 15 | 127 |
| 128 expr = macroexpand(p2, line, len, true); | |
| 16 | 129 val = eval(&p3, expr); |
| 15 | 130 ifstate_push(p, val); |
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131 dostrfree(expr); |
| 15 | 132 } |
| 133 | |
| 134 static | |
| 135 void | |
| 136 d_ifdef(struct place *p, struct place *p2, char *line, size_t len) | |
| 137 { | |
| 138 oneword("#ifdef", p2, line); | |
| 139 ifstate_push(p, macro_isdefined(line)); | |
| 140 } | |
| 141 | |
| 142 static | |
| 143 void | |
| 144 d_ifndef(struct place *p, struct place *p2, char *line, size_t len) | |
| 145 { | |
| 146 oneword("#ifndef", p2, line); | |
| 147 ifstate_push(p, !macro_isdefined(line)); | |
| 148 } | |
| 149 | |
| 150 static | |
| 151 void | |
| 152 d_elif(struct place *p, struct place *p2, char *line, size_t len) | |
| 153 { | |
| 154 char *expr; | |
| 16 | 155 struct place p3 = *p2; |
| 15 | 156 |
| 157 if (ifstate->seenelse) { | |
| 158 complain(p, "#elif after #else"); | |
| 159 complain_fail(); | |
| 160 } | |
| 161 | |
| 162 if (ifstate->evertrue) { | |
| 163 ifstate->curtrue = false; | |
| 164 } else { | |
| 165 expr = macroexpand(p2, line, len, true); | |
| 16 | 166 ifstate->curtrue = eval(&p3, expr); |
| 15 | 167 ifstate->evertrue = ifstate->curtrue; |
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168 dostrfree(expr); |
| 15 | 169 } |
| 170 } | |
| 171 | |
| 172 static | |
| 173 void | |
| 174 d_else(struct place *p, struct place *p2, char *line, size_t len) | |
| 175 { | |
| 176 if (ifstate->seenelse) { | |
| 177 complain(p, "Multiple #else directives in one conditional"); | |
| 178 complain_fail(); | |
| 179 } | |
| 180 | |
| 181 ifstate->curtrue = !ifstate->evertrue; | |
| 182 ifstate->evertrue = true; | |
| 183 ifstate->seenelse = true; | |
| 184 } | |
| 185 | |
| 186 static | |
| 187 void | |
| 188 d_endif(struct place *p, struct place *p2, char *line, size_t len) | |
| 189 { | |
| 190 if (ifstate->prev == NULL) { | |
| 191 complain(p, "Unmatched #endif"); | |
| 192 complain_fail(); | |
| 193 } else { | |
| 194 ifstate_pop(); | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 //////////////////////////////////////////////////////////// | |
| 199 // macros | |
| 200 | |
| 201 static | |
| 202 void | |
| 203 d_define(struct place *p, struct place *p2, char *line, size_t len) | |
| 204 { | |
| 18 | 205 size_t pos, argpos; |
| 206 struct place p3, p4; | |
| 15 | 207 |
| 208 /* | |
| 209 * line may be: | |
| 210 * macro expansion | |
| 211 * macro(arg, arg, ...) expansion | |
| 212 */ | |
| 213 | |
| 214 pos = strcspn(line, " \t\f\v("); | |
| 215 if (line[pos] == '(') { | |
| 18 | 216 line[pos++] = '\0'; |
| 217 argpos = pos; | |
| 15 | 218 pos = pos + strcspn(line+pos, "()"); |
| 219 if (line[pos] == '(') { | |
| 220 p2->column += pos; | |
| 221 complain(p2, "Left parenthesis in macro parameters"); | |
| 222 complain_fail(); | |
| 223 return; | |
| 224 } | |
| 225 if (line[pos] != ')') { | |
| 226 p2->column += pos; | |
| 227 complain(p2, "Unclosed macro parameter list"); | |
| 228 complain_fail(); | |
| 229 return; | |
| 230 } | |
| 18 | 231 line[pos++] = '\0'; |
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232 #if 0 |
| 15 | 233 if (!strchr(ws, line[pos])) { |
| 234 p2->column += pos; | |
| 235 complain(p2, "Trash after macro parameter list"); | |
| 236 complain_fail(); | |
| 237 return; | |
| 238 } | |
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239 #endif |
| 15 | 240 } else if (line[pos] == '\0') { |
| 18 | 241 argpos = 0; |
| 15 | 242 } else { |
| 243 line[pos++] = '\0'; | |
| 18 | 244 argpos = 0; |
| 15 | 245 } |
| 246 | |
| 247 pos += strspn(line+pos, ws); | |
| 248 | |
| 249 p3 = *p2; | |
| 18 | 250 p3.column += argpos; |
| 251 | |
| 252 p4 = *p2; | |
| 253 p4.column += pos; | |
| 254 | |
| 255 if (argpos) { | |
| 256 macro_define_params(p2, line, &p3, | |
| 257 line + argpos, &p4, | |
| 258 line + pos); | |
| 259 } else { | |
| 260 macro_define_plain(p2, line, &p4, line + pos); | |
| 261 } | |
| 15 | 262 } |
| 263 | |
| 264 static | |
| 265 void | |
| 266 d_undef(struct place *p, struct place *p2, char *line, size_t len) | |
| 267 { | |
| 268 oneword("#undef", p2, line); | |
| 269 macro_undef(line); | |
| 270 } | |
| 271 | |
| 272 //////////////////////////////////////////////////////////// | |
| 273 // includes | |
| 274 | |
| 275 static | |
| 276 bool | |
| 277 tryinclude(struct place *p, char *line, size_t len) | |
| 278 { | |
| 279 if (len > 2 && line[0] == '"' && line[len-1] == '"') { | |
| 280 line[len-1] = '\0'; | |
| 281 file_readquote(p, line+1); | |
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282 line[len-1] = '"'; |
| 15 | 283 return true; |
| 284 } | |
| 285 if (len > 2 && line[0] == '<' && line[len-1] == '>') { | |
| 286 line[len-1] = '\0'; | |
| 287 file_readbracket(p, line+1); | |
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288 line[len-1] = '>'; |
| 15 | 289 return true; |
| 290 } | |
| 291 return false; | |
| 292 } | |
| 293 | |
| 294 static | |
| 295 void | |
| 296 d_include(struct place *p, struct place *p2, char *line, size_t len) | |
| 297 { | |
| 298 char *text; | |
| 299 | |
| 300 if (tryinclude(p, line, len)) { | |
| 301 return; | |
| 302 } | |
| 303 text = macroexpand(p2, line, len, false); | |
| 304 if (tryinclude(p, text, strlen(text))) { | |
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305 dostrfree(text); |
| 15 | 306 return; |
| 307 } | |
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308 dostrfree(text); |
| 15 | 309 complain(p, "Illegal #include directive"); |
| 310 complain_fail(); | |
| 311 } | |
| 312 | |
| 313 static | |
| 314 void | |
| 315 d_line(struct place *p, struct place *p2, char *line, size_t len) | |
| 316 { | |
| 317 /* XXX */ | |
| 318 complain(p, "Sorry, no #line yet"); | |
| 319 } | |
| 320 | |
| 321 //////////////////////////////////////////////////////////// | |
| 322 // messages | |
| 323 | |
| 324 static | |
| 325 void | |
| 326 d_warning(struct place *p, struct place *p2, char *line, size_t len) | |
| 327 { | |
| 328 char *msg; | |
| 329 | |
| 330 msg = macroexpand(p2, line, len, false); | |
| 331 complain(p, "#warning: %s", msg); | |
| 332 if (mode.werror) { | |
| 333 complain_fail(); | |
| 334 } | |
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335 dostrfree(msg); |
| 15 | 336 } |
| 337 | |
| 338 static | |
| 339 void | |
| 340 d_error(struct place *p, struct place *p2, char *line, size_t len) | |
| 341 { | |
| 342 char *msg; | |
| 343 | |
| 344 msg = macroexpand(p2, line, len, false); | |
| 345 complain(p, "#error: %s", msg); | |
| 346 complain_fail(); | |
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347 dostrfree(msg); |
| 15 | 348 } |
| 349 | |
| 350 //////////////////////////////////////////////////////////// | |
| 351 // other | |
| 352 | |
| 353 static | |
| 354 void | |
| 355 d_pragma(struct place *p, struct place *p2, char *line, size_t len) | |
| 356 { | |
| 357 complain(p, "#pragma %s", line); | |
| 358 complain_fail(); | |
| 359 } | |
| 360 | |
| 361 //////////////////////////////////////////////////////////// | |
| 362 // directive table | |
| 363 | |
| 364 static const struct { | |
| 365 const char *name; | |
| 366 bool ifskip; | |
| 367 void (*func)(struct place *, struct place *, char *line, size_t len); | |
| 368 } directives[] = { | |
| 369 { "define", true, d_define }, | |
| 370 { "elif", false, d_elif }, | |
| 371 { "else", false, d_else }, | |
| 372 { "endif", false, d_endif }, | |
| 373 { "error", true, d_error }, | |
| 374 { "if", false, d_if }, | |
| 375 { "ifdef", false, d_ifdef }, | |
| 376 { "ifndef", false, d_ifndef }, | |
| 377 { "include", true, d_include }, | |
| 378 { "line", true, d_line }, | |
| 379 { "pragma", true, d_pragma }, | |
| 380 { "undef", true, d_undef }, | |
| 381 { "warning", true, d_warning }, | |
| 382 }; | |
| 383 static const unsigned numdirectives = HOWMANY(directives); | |
| 384 | |
| 385 static | |
| 386 void | |
| 387 directive_gotdirective(struct place *p, char *line, size_t linelen) | |
| 388 { | |
| 389 struct place p2; | |
| 390 size_t len, skip; | |
| 391 unsigned i; | |
| 392 | |
| 393 p2 = *p; | |
| 394 for (i=0; i<numdirectives; i++) { | |
| 395 len = strlen(directives[i].name); | |
| 396 if (!strncmp(line, directives[i].name, len) && | |
| 397 strchr(ws, line[len])) { | |
| 398 if (directives[i].ifskip && !ifstate->curtrue) { | |
| 399 return; | |
| 400 } | |
| 401 skip = len + strspn(line+len, ws); | |
| 402 p2.column += skip; | |
| 403 line += skip; | |
| 404 linelen -= skip; | |
| 405 linelen = notrailingws(line, linelen); | |
| 406 directives[i].func(p, &p2, line, linelen); | |
| 407 return; | |
| 408 } | |
| 409 } | |
| 410 skip = strcspn(line, ws); | |
| 411 complain(p, "Unknown directive #%.*s", (int)skip, line); | |
| 412 complain_fail(); | |
| 413 } | |
| 414 | |
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415 /* |
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416 * If desired, warn about a nested comment. The comment begins at |
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417 * offset POS from the place P. |
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418 */ |
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419 static |
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420 void |
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421 warn_nestcomment(const struct place *p, size_t pos) |
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422 { |
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423 struct place p2; |
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424 |
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425 if (warns.nestcomment) { |
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426 p2 = *p; |
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427 p2.column += pos; |
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428 complain(p, "Warning: %c%c within comment", |
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429 '/', '*'); |
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430 if (mode.werror) { |
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431 complain_failed(); |
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432 } |
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433 } |
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434 } |
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435 |
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436 /* |
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437 * Check for comment delimiters in LINE. If a multi-line comment is |
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438 * continuing or ending, set ACOMM to its length. If a multi-line |
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439 * comment is starting, set BCOMM to its length. Set TEXT to the |
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440 * length of text that is not commented out, or that contains comments |
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441 * that both begin and end on this line. ACOMM + TEXT + BCOMM == LEN. |
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442 * |
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443 * Updates in_multiline_comment to the appropriate state for after |
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444 * this line is handled. |
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445 */ |
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446 static |
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447 size_t |
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448 directive_scancomments(const struct place *p, char *line, size_t len, |
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449 size_t *acomm, size_t *text, size_t *bcomm) |
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450 { |
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451 size_t pos; |
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452 size_t first_commentend; |
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453 size_t last_commentstart; |
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454 bool incomment; |
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455 |
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456 first_commentend = len; |
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457 last_commentstart = len; |
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458 incomment = in_multiline_comment; |
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459 for (pos = 0; pos+1 < len; pos++) { |
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460 if (line[pos] == '/' && line[pos+1] == '*') { |
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461 if (incomment) { |
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462 warn_nestcomment(p, pos); |
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463 } else { |
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464 incomment = true; |
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465 last_commentstart = pos; |
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466 } |
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467 } else if (line[pos] == '*' && line[pos+1] == '/') { |
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468 if (incomment) { |
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469 incomment = false; |
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470 if (first_commentend == len) { |
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471 first_commentend = pos; |
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472 } |
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473 last_commentstart = len; |
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474 } else { |
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475 /* stray end-comment; should we care? */ |
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476 } |
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477 } |
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478 } |
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479 |
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480 if (in_multiline_comment && first_commentend < last_commentstart) { |
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481 /* multiline comment ends */ |
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482 /* first_commentend points to the star, adjust */ |
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483 *acomm = first_commentend + 2; |
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484 *text = len - *acomm; |
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485 } else if (in_multiline_comment) { |
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486 /* comment did not end, so another one cannot have started */ |
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487 assert(last_commentstart == len); |
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488 *acomm = len; |
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489 *text = 0; |
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490 } else { |
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491 *acomm = 0; |
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492 *text = len; |
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493 } |
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494 |
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495 *bcomm = len - last_commentstart; |
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496 *text -= *bcomm; |
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497 |
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498 in_multiline_comment = incomment; |
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499 return len; |
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500 } |
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501 |
| 15 | 502 void |
| 503 directive_gotline(struct place *p, char *line, size_t len) | |
| 504 { | |
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505 size_t acomm; /* length of comment ending on this line */ |
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506 size_t text; /* length of non-multi-line-comment text */ |
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507 size_t bcomm; /* length of comment beginning on this line */ |
| 15 | 508 size_t skip; |
| 509 | |
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510 directive_scancomments(p, line, len, &acomm, &text, &bcomm); |
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511 |
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512 if (acomm > 0) { |
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513 if (mode.output_retain_comments && ifstate->curtrue) { |
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514 /* |
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515 * Do not expand the comment; send it straight |
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516 * to the output. This will cause it to appear |
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517 * first if we're partway through collecting a |
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518 * macro argument. Too bad. This isn't a |
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519 * standard mode anyway. |
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520 */ |
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521 output(p, line, acomm); |
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522 } |
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523 p->column += acomm; |
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524 } |
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525 |
| 15 | 526 /* check if we have a directive line */ |
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527 skip = strspn(line + acomm, ws); |
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528 if (acomm == 0 && line[skip] == '#') { |
| 15 | 529 skip = skip + 1 + strspn(line + skip + 1, ws); |
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530 assert(skip <= text); |
| 15 | 531 p->column += skip; |
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532 directive_gotdirective(p, line+skip, text-skip); |
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533 p->column += text-skip; |
| 15 | 534 } else if (ifstate->curtrue) { |
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535 macro_sendline(p, line + acomm, text); |
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536 p->column += text; |
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537 } |
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538 |
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539 if (bcomm > 0) { |
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540 if (mode.output_retain_comments && ifstate->curtrue) { |
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541 output(p, line + acomm + text, bcomm); |
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542 } |
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543 p->column += bcomm; |
| 15 | 544 } |
| 545 } | |
| 546 | |
| 547 void | |
| 548 directive_goteof(struct place *p) | |
| 549 { | |
| 550 while (ifstate->prev != NULL) { | |
| 551 complain(p, "Missing #endif"); | |
| 552 complain(&ifstate->startplace, "...opened at this point"); | |
| 553 complain_failed(); | |
| 554 ifstate_pop(); | |
| 555 } | |
| 556 macro_sendeof(p); | |
| 557 } | |
| 558 | |
| 559 //////////////////////////////////////////////////////////// | |
| 560 // module initialization | |
| 561 | |
| 562 void | |
| 563 directive_init(void) | |
| 564 { | |
| 565 ifstate = ifstate_create(NULL, NULL, true); | |
| 566 } | |
| 567 | |
| 568 void | |
| 569 directive_cleanup(void) | |
| 570 { | |
| 571 assert(ifstate->prev == NULL); | |
| 572 ifstate_destroy(ifstate); | |
| 573 ifstate = NULL; | |
| 574 } |