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annotate files.c @ 112:2b0b61fd1a36
Fix handling of relative includes.
| author | David A. Holland |
|---|---|
| date | Tue, 11 Jun 2013 13:50:07 -0400 |
| parents | 33954a07d013 |
| children | 1e7144176a42 |
| rev | line source |
|---|---|
| 30 | 1 /*- |
|
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add 2013 to copyrights where it seems warranted
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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 | |
| 6 | 30 #include <stdbool.h> |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 13 | 33 #include <string.h> |
| 6 | 34 #include <unistd.h> |
| 35 #include <fcntl.h> | |
| 36 #include <err.h> | |
| 37 | |
| 38 #include "array.h" | |
| 15 | 39 #include "mode.h" |
| 8 | 40 #include "place.h" |
| 6 | 41 #include "files.h" |
| 15 | 42 #include "directive.h" |
| 6 | 43 |
| 44 struct incdir { | |
| 45 const char *name; | |
| 46 bool issystem; | |
| 47 }; | |
| 48 | |
| 107 | 49 DECLARRAY(incdir, static UNUSED); |
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50 DEFARRAY(incdir, static); |
| 6 | 51 |
| 52 static struct incdirarray quotepath, bracketpath; | |
| 53 | |
| 54 //////////////////////////////////////////////////////////// | |
| 55 // management | |
| 56 | |
| 57 static | |
| 58 struct incdir * | |
| 59 incdir_create(const char *name, bool issystem) | |
| 60 { | |
| 61 struct incdir *id; | |
| 62 | |
| 63 id = domalloc(sizeof(*id)); | |
| 64 id->name = name; | |
| 65 id->issystem = issystem; | |
| 66 return id; | |
| 67 } | |
| 68 | |
| 69 static | |
| 70 void | |
| 71 incdir_destroy(struct incdir *id) | |
| 72 { | |
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73 dofree(id, sizeof(*id)); |
| 6 | 74 } |
| 75 | |
| 76 void | |
| 77 files_init(void) | |
| 78 { | |
| 79 incdirarray_init("epath); | |
| 80 incdirarray_init(&bracketpath); | |
| 81 } | |
| 82 | |
| 9 | 83 DESTROYALL_ARRAY(incdir, ); |
| 6 | 84 |
| 85 void | |
| 86 files_cleanup(void) | |
| 87 { | |
| 88 incdirarray_destroyall("epath); | |
| 89 incdirarray_cleanup("epath); | |
| 90 incdirarray_destroyall(&bracketpath); | |
| 91 incdirarray_cleanup(&bracketpath); | |
| 92 } | |
| 93 | |
| 94 //////////////////////////////////////////////////////////// | |
| 95 // path setup | |
| 96 | |
| 97 void | |
| 98 files_addquotepath(const char *dir, bool issystem) | |
| 99 { | |
| 100 struct incdir *id; | |
| 101 | |
| 102 id = incdir_create(dir, issystem); | |
| 103 incdirarray_add("epath, id, NULL); | |
| 104 } | |
| 105 | |
| 106 void | |
| 107 files_addbracketpath(const char *dir, bool issystem) | |
| 108 { | |
| 109 struct incdir *id; | |
| 110 | |
| 111 id = incdir_create(dir, issystem); | |
| 112 incdirarray_add(&bracketpath, id, NULL); | |
| 113 } | |
| 114 | |
| 115 //////////////////////////////////////////////////////////// | |
| 116 // parsing | |
| 117 | |
| 75 | 118 /* |
| 119 * Find the end of the logical line. End of line characters that are | |
| 120 * commented out do not count. | |
| 121 */ | |
| 15 | 122 static |
| 123 size_t | |
| 75 | 124 findeol(const char *buf, size_t start, size_t limit) |
| 15 | 125 { |
| 126 size_t i; | |
| 75 | 127 int incomment = 0; |
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128 bool inquote = false; |
| 75 | 129 |
| 130 for (i=start; i<limit; i++) { | |
| 131 if (incomment) { | |
| 132 if (i+1 < limit && buf[i] == '*' && buf[i+1] == '/') { | |
| 133 i++; | |
| 134 incomment = 0; | |
| 135 } | |
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136 } else if (!inquote && i+1 < limit && |
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137 buf[i] == '/' && buf[i+1] == '*') { |
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138 i++; |
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139 incomment = 1; |
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140 } else if (i+1 < limit && |
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141 buf[i] == '\\' && buf[i+1] == '"') { |
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142 i++; |
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143 } else if (buf[i] == '"') { |
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144 inquote = !inquote; |
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145 } else if (buf[i] == '\n') { |
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146 return i; |
| 75 | 147 } |
| 148 } | |
| 149 return limit; | |
| 150 } | |
| 151 | |
| 152 static | |
| 153 unsigned | |
| 154 countnls(const char *buf, size_t start, size_t limit) | |
| 155 { | |
| 156 size_t i; | |
| 157 unsigned count = 0; | |
| 15 | 158 |
| 159 for (i=start; i<limit; i++) { | |
| 160 if (buf[i] == '\n') { | |
| 75 | 161 count++; |
| 15 | 162 } |
| 163 } | |
| 75 | 164 return count; |
| 15 | 165 } |
| 166 | |
| 167 static | |
| 6 | 168 void |
| 28 | 169 file_read(const struct placefile *pf, int fd, const char *name, bool toplevel) |
| 15 | 170 { |
| 171 struct place linestartplace, nextlinestartplace, ptmp; | |
| 172 size_t bufend, bufmax, linestart, lineend, nextlinestart, tmp; | |
| 173 ssize_t result; | |
| 174 bool ateof = false; | |
| 175 char *buf; | |
| 176 | |
| 177 place_setfilestart(&linestartplace, pf); | |
| 178 nextlinestartplace = linestartplace; | |
| 179 | |
| 180 bufmax = 128; | |
| 181 bufend = 0; | |
| 182 linestart = 0; | |
| 183 lineend = 0; | |
| 184 buf = domalloc(bufmax); | |
| 185 | |
| 186 while (1) { | |
| 187 if (lineend >= bufend) { | |
| 188 /* do not have a whole line in the buffer; read more */ | |
| 75 | 189 assert(bufend >= linestart); |
| 15 | 190 if (linestart > 0 && bufend > linestart) { |
| 191 /* slide to beginning of buffer */ | |
| 192 memmove(buf, buf+linestart, bufend-linestart); | |
| 193 bufend -= linestart; | |
| 194 lineend -= linestart; | |
| 195 linestart = 0; | |
| 196 } | |
| 197 if (bufend >= bufmax) { | |
| 198 /* need bigger buffer */ | |
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199 buf = dorealloc(buf, bufmax, bufmax*2); |
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200 bufmax = bufmax*2; |
| 15 | 201 } |
| 202 | |
| 203 if (ateof) { | |
| 204 /* don't read again, in case it's a socket */ | |
| 205 result = 0; | |
| 206 } else { | |
| 207 result = read(fd, buf+bufend, bufmax - bufend); | |
| 208 } | |
| 209 | |
| 210 if (result == -1) { | |
| 211 /* read error */ | |
| 212 warn("%s", name); | |
| 213 complain_fail(); | |
| 214 } else if (result == 0 && bufend == linestart) { | |
| 215 /* eof */ | |
| 216 ateof = true; | |
| 217 break; | |
| 218 } else if (result == 0) { | |
| 219 /* eof in middle of line */ | |
| 220 ateof = true; | |
| 221 ptmp = linestartplace; | |
| 222 ptmp.column += bufend - linestart; | |
| 223 complain(&ptmp, "No newline at end of file"); | |
| 224 if (mode.werror) { | |
| 225 complain_fail(); | |
| 226 } | |
| 227 assert(bufend < bufmax); | |
| 228 lineend = bufend++; | |
| 229 buf[lineend] = '\n'; | |
| 230 } else { | |
| 231 bufend += (size_t)result; | |
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232 lineend = findeol(buf, linestart, bufend); |
| 15 | 233 } |
| 234 /* loop in case we still don't have a whole line */ | |
| 235 continue; | |
| 236 } | |
| 237 | |
| 238 /* have a line */ | |
| 239 assert(buf[lineend] == '\n'); | |
| 240 buf[lineend] = '\0'; | |
| 241 nextlinestart = lineend+1; | |
| 242 nextlinestartplace.line++; | |
| 243 | |
| 244 /* check for CR/NL */ | |
| 245 if (lineend > 0 && buf[lineend-1] == '\r') { | |
| 246 buf[lineend-1] = '\0'; | |
| 247 lineend--; | |
| 248 } | |
| 249 | |
| 250 /* check for continuation line */ | |
| 251 if (lineend > 0 && buf[lineend-1]=='\\') { | |
| 252 lineend--; | |
| 253 tmp = nextlinestart - lineend; | |
| 254 if (bufend > nextlinestart) { | |
| 255 memmove(buf+lineend, buf+nextlinestart, | |
| 256 bufend - nextlinestart); | |
| 257 } | |
| 258 bufend -= tmp; | |
| 259 nextlinestart -= tmp; | |
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diff
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260 lineend = findeol(buf, linestart, bufend); |
| 15 | 261 /* might not have a whole line, so loop */ |
| 262 continue; | |
| 263 } | |
| 264 | |
| 265 /* line now goes from linestart to lineend */ | |
| 266 assert(buf[lineend] == '\0'); | |
| 75 | 267 |
| 268 /* count how many commented-out newlines we swallowed */ | |
| 269 nextlinestartplace.line += countnls(buf, linestart, lineend); | |
| 270 | |
| 271 /* if the line isn't empty, process it */ | |
| 15 | 272 if (lineend > linestart) { |
| 273 directive_gotline(&linestartplace, | |
| 274 buf+linestart, lineend-linestart); | |
| 275 } | |
| 276 | |
| 277 linestart = nextlinestart; | |
| 75 | 278 lineend = findeol(buf, linestart, bufend); |
| 15 | 279 linestartplace = nextlinestartplace; |
| 280 } | |
| 281 | |
| 28 | 282 if (toplevel) { |
| 283 directive_goteof(&linestartplace); | |
| 284 } | |
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parents:
38
diff
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285 dofree(buf, bufmax); |
| 15 | 286 } |
| 6 | 287 |
| 288 //////////////////////////////////////////////////////////// | |
| 289 // path search | |
| 290 | |
| 291 static | |
| 13 | 292 char * |
| 112 | 293 mkfilename(struct place *place, const char *dir, const char *file) |
| 13 | 294 { |
| 295 size_t dlen, flen, rlen; | |
| 296 char *ret; | |
| 297 bool needslash = false; | |
| 298 | |
| 112 | 299 if (dir == NULL) { |
| 300 dir = place_getparsedir(place); | |
| 301 } | |
| 302 | |
| 13 | 303 dlen = strlen(dir); |
| 304 flen = strlen(file); | |
| 305 if (dlen > 0 && dir[dlen-1] != '/') { | |
| 306 needslash = true; | |
| 307 } | |
| 308 | |
| 309 rlen = dlen + (needslash ? 1 : 0) + flen; | |
| 310 ret = domalloc(rlen + 1); | |
| 311 strcpy(ret, dir); | |
| 312 if (needslash) { | |
| 313 strcat(ret, "/"); | |
| 314 } | |
| 315 strcat(ret, file); | |
| 316 return ret; | |
| 317 } | |
| 318 | |
| 319 static | |
| 6 | 320 int |
| 321 file_tryopen(const char *file) | |
| 322 { | |
| 323 int fd; | |
| 324 | |
| 15 | 325 /* XXX check for non-regular files */ |
| 326 | |
| 6 | 327 fd = open(file, O_RDONLY); |
| 328 if (fd < 0) { | |
| 329 return -1; | |
| 330 } | |
| 15 | 331 |
| 6 | 332 return fd; |
| 333 } | |
| 334 | |
| 335 static | |
| 336 void | |
| 337 file_search(struct place *place, struct incdirarray *path, const char *name) | |
| 338 { | |
| 339 unsigned i, num; | |
| 340 struct incdir *id; | |
| 13 | 341 const struct placefile *pf; |
| 6 | 342 char *file; |
| 343 int fd; | |
| 344 | |
| 345 assert(place != NULL); | |
| 346 | |
| 104 | 347 if (name[0] == '/') { |
| 348 fd = file_tryopen(name); | |
| 6 | 349 if (fd >= 0) { |
| 104 | 350 pf = place_addfile(place, name, true); |
| 351 file_read(pf, fd, name, false); | |
| 6 | 352 close(fd); |
| 353 return; | |
| 354 } | |
| 104 | 355 } else { |
| 356 num = incdirarray_num(path); | |
| 357 for (i=0; i<num; i++) { | |
| 358 id = incdirarray_get(path, i); | |
| 112 | 359 file = mkfilename(place, id->name, name); |
| 104 | 360 fd = file_tryopen(file); |
| 361 if (fd >= 0) { | |
| 362 pf = place_addfile(place, file, id->issystem); | |
| 363 file_read(pf, fd, file, false); | |
| 364 dostrfree(file); | |
| 365 close(fd); | |
| 366 return; | |
| 367 } | |
| 368 dostrfree(file); | |
| 369 } | |
| 6 | 370 } |
| 371 complain(place, "Include file %s not found", name); | |
| 372 complain_fail(); | |
| 373 } | |
| 374 | |
| 375 void | |
| 376 file_readquote(struct place *place, const char *name) | |
| 377 { | |
| 378 file_search(place, "epath, name); | |
| 379 } | |
| 380 | |
| 381 void | |
| 382 file_readbracket(struct place *place, const char *name) | |
| 383 { | |
| 384 file_search(place, &bracketpath, name); | |
| 385 } | |
| 386 | |
| 387 void | |
| 388 file_readabsolute(struct place *place, const char *name) | |
| 389 { | |
| 13 | 390 const struct placefile *pf; |
| 6 | 391 int fd; |
| 392 | |
| 393 assert(place != NULL); | |
| 394 | |
| 24 | 395 if (name == NULL) { |
| 396 fd = STDIN_FILENO; | |
| 397 pf = place_addfile(place, "<standard-input>", false); | |
| 398 } else { | |
| 399 fd = file_tryopen(name); | |
| 400 if (fd < 0) { | |
| 401 warn("%s", name); | |
| 402 die(); | |
| 403 } | |
| 404 pf = place_addfile(place, name, false); | |
| 6 | 405 } |
| 24 | 406 |
| 28 | 407 file_read(pf, fd, name, true); |
| 24 | 408 |
| 409 if (name != NULL) { | |
| 410 close(fd); | |
| 411 } | |
| 6 | 412 } |