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annotate files.c @ 118:c13f36775fe8
Preserve leading whitespace in macro arguments.
| author | David A. Holland |
|---|---|
| date | Tue, 11 Jun 2013 14:12:27 -0400 |
| parents | 1e7144176a42 |
| children | 1cda505ddc78 |
| 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 | |
| 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> | |
|
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36 #include <errno.h> |
| 6 | 37 #include <err.h> |
| 38 | |
| 39 #include "array.h" | |
| 15 | 40 #include "mode.h" |
| 8 | 41 #include "place.h" |
| 6 | 42 #include "files.h" |
| 15 | 43 #include "directive.h" |
| 6 | 44 |
| 45 struct incdir { | |
| 46 const char *name; | |
| 47 bool issystem; | |
| 48 }; | |
| 49 | |
| 107 | 50 DECLARRAY(incdir, static UNUSED); |
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51 DEFARRAY(incdir, static); |
| 6 | 52 |
| 53 static struct incdirarray quotepath, bracketpath; | |
| 54 | |
| 55 //////////////////////////////////////////////////////////// | |
| 56 // management | |
| 57 | |
| 58 static | |
| 59 struct incdir * | |
| 60 incdir_create(const char *name, bool issystem) | |
| 61 { | |
| 62 struct incdir *id; | |
| 63 | |
| 64 id = domalloc(sizeof(*id)); | |
| 65 id->name = name; | |
| 66 id->issystem = issystem; | |
| 67 return id; | |
| 68 } | |
| 69 | |
| 70 static | |
| 71 void | |
| 72 incdir_destroy(struct incdir *id) | |
| 73 { | |
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74 dofree(id, sizeof(*id)); |
| 6 | 75 } |
| 76 | |
| 77 void | |
| 78 files_init(void) | |
| 79 { | |
| 80 incdirarray_init("epath); | |
| 81 incdirarray_init(&bracketpath); | |
| 82 } | |
| 83 | |
| 9 | 84 DESTROYALL_ARRAY(incdir, ); |
| 6 | 85 |
| 86 void | |
| 87 files_cleanup(void) | |
| 88 { | |
| 89 incdirarray_destroyall("epath); | |
| 90 incdirarray_cleanup("epath); | |
| 91 incdirarray_destroyall(&bracketpath); | |
| 92 incdirarray_cleanup(&bracketpath); | |
| 93 } | |
| 94 | |
| 95 //////////////////////////////////////////////////////////// | |
| 96 // path setup | |
| 97 | |
| 98 void | |
| 99 files_addquotepath(const char *dir, bool issystem) | |
| 100 { | |
| 101 struct incdir *id; | |
| 102 | |
| 103 id = incdir_create(dir, issystem); | |
| 104 incdirarray_add("epath, id, NULL); | |
| 105 } | |
| 106 | |
| 107 void | |
| 108 files_addbracketpath(const char *dir, bool issystem) | |
| 109 { | |
| 110 struct incdir *id; | |
| 111 | |
| 112 id = incdir_create(dir, issystem); | |
| 113 incdirarray_add(&bracketpath, id, NULL); | |
| 114 } | |
| 115 | |
| 116 //////////////////////////////////////////////////////////// | |
| 117 // parsing | |
| 118 | |
| 75 | 119 /* |
| 120 * Find the end of the logical line. End of line characters that are | |
| 121 * commented out do not count. | |
| 122 */ | |
| 15 | 123 static |
| 124 size_t | |
| 75 | 125 findeol(const char *buf, size_t start, size_t limit) |
| 15 | 126 { |
| 127 size_t i; | |
| 75 | 128 int incomment = 0; |
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129 bool inquote = false; |
| 75 | 130 |
| 131 for (i=start; i<limit; i++) { | |
| 132 if (incomment) { | |
| 133 if (i+1 < limit && buf[i] == '*' && buf[i+1] == '/') { | |
| 134 i++; | |
| 135 incomment = 0; | |
| 136 } | |
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137 } else if (!inquote && i+1 < limit && |
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138 buf[i] == '/' && buf[i+1] == '*') { |
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139 i++; |
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140 incomment = 1; |
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141 } else if (i+1 < limit && |
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142 buf[i] == '\\' && buf[i+1] == '"') { |
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143 i++; |
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144 } else if (buf[i] == '"') { |
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145 inquote = !inquote; |
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146 } else if (buf[i] == '\n') { |
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147 return i; |
| 75 | 148 } |
| 149 } | |
| 150 return limit; | |
| 151 } | |
| 152 | |
| 153 static | |
| 154 unsigned | |
| 155 countnls(const char *buf, size_t start, size_t limit) | |
| 156 { | |
| 157 size_t i; | |
| 158 unsigned count = 0; | |
| 15 | 159 |
| 160 for (i=start; i<limit; i++) { | |
| 161 if (buf[i] == '\n') { | |
| 75 | 162 count++; |
| 15 | 163 } |
| 164 } | |
| 75 | 165 return count; |
| 15 | 166 } |
| 167 | |
| 168 static | |
| 6 | 169 void |
| 28 | 170 file_read(const struct placefile *pf, int fd, const char *name, bool toplevel) |
| 15 | 171 { |
| 172 struct place linestartplace, nextlinestartplace, ptmp; | |
| 173 size_t bufend, bufmax, linestart, lineend, nextlinestart, tmp; | |
| 174 ssize_t result; | |
| 175 bool ateof = false; | |
| 176 char *buf; | |
| 177 | |
| 178 place_setfilestart(&linestartplace, pf); | |
| 179 nextlinestartplace = linestartplace; | |
| 180 | |
| 181 bufmax = 128; | |
| 182 bufend = 0; | |
| 183 linestart = 0; | |
| 184 lineend = 0; | |
| 185 buf = domalloc(bufmax); | |
| 186 | |
| 187 while (1) { | |
| 188 if (lineend >= bufend) { | |
| 189 /* do not have a whole line in the buffer; read more */ | |
| 75 | 190 assert(bufend >= linestart); |
| 15 | 191 if (linestart > 0 && bufend > linestart) { |
| 192 /* slide to beginning of buffer */ | |
| 193 memmove(buf, buf+linestart, bufend-linestart); | |
| 194 bufend -= linestart; | |
| 195 lineend -= linestart; | |
| 196 linestart = 0; | |
| 197 } | |
| 198 if (bufend >= bufmax) { | |
| 199 /* need bigger buffer */ | |
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200 buf = dorealloc(buf, bufmax, bufmax*2); |
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201 bufmax = bufmax*2; |
| 15 | 202 } |
| 203 | |
| 204 if (ateof) { | |
| 205 /* don't read again, in case it's a socket */ | |
| 206 result = 0; | |
| 207 } else { | |
| 208 result = read(fd, buf+bufend, bufmax - bufend); | |
| 209 } | |
| 210 | |
| 211 if (result == -1) { | |
| 212 /* read error */ | |
| 213 warn("%s", name); | |
| 214 complain_fail(); | |
| 215 } else if (result == 0 && bufend == linestart) { | |
| 216 /* eof */ | |
| 217 ateof = true; | |
| 218 break; | |
| 219 } else if (result == 0) { | |
| 220 /* eof in middle of line */ | |
| 221 ateof = true; | |
| 222 ptmp = linestartplace; | |
| 223 ptmp.column += bufend - linestart; | |
| 224 complain(&ptmp, "No newline at end of file"); | |
| 225 if (mode.werror) { | |
| 226 complain_fail(); | |
| 227 } | |
| 228 assert(bufend < bufmax); | |
| 229 lineend = bufend++; | |
| 230 buf[lineend] = '\n'; | |
| 231 } else { | |
| 232 bufend += (size_t)result; | |
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233 lineend = findeol(buf, linestart, bufend); |
| 15 | 234 } |
| 235 /* loop in case we still don't have a whole line */ | |
| 236 continue; | |
| 237 } | |
| 238 | |
| 239 /* have a line */ | |
| 240 assert(buf[lineend] == '\n'); | |
| 241 buf[lineend] = '\0'; | |
| 242 nextlinestart = lineend+1; | |
| 243 nextlinestartplace.line++; | |
| 244 | |
| 245 /* check for CR/NL */ | |
| 246 if (lineend > 0 && buf[lineend-1] == '\r') { | |
| 247 buf[lineend-1] = '\0'; | |
| 248 lineend--; | |
| 249 } | |
| 250 | |
| 251 /* check for continuation line */ | |
| 252 if (lineend > 0 && buf[lineend-1]=='\\') { | |
| 253 lineend--; | |
| 254 tmp = nextlinestart - lineend; | |
| 255 if (bufend > nextlinestart) { | |
| 256 memmove(buf+lineend, buf+nextlinestart, | |
| 257 bufend - nextlinestart); | |
| 258 } | |
| 259 bufend -= tmp; | |
| 260 nextlinestart -= tmp; | |
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261 lineend = findeol(buf, linestart, bufend); |
| 15 | 262 /* might not have a whole line, so loop */ |
| 263 continue; | |
| 264 } | |
| 265 | |
| 266 /* line now goes from linestart to lineend */ | |
| 267 assert(buf[lineend] == '\0'); | |
| 75 | 268 |
| 269 /* count how many commented-out newlines we swallowed */ | |
| 270 nextlinestartplace.line += countnls(buf, linestart, lineend); | |
| 271 | |
| 272 /* if the line isn't empty, process it */ | |
| 15 | 273 if (lineend > linestart) { |
| 274 directive_gotline(&linestartplace, | |
| 275 buf+linestart, lineend-linestart); | |
| 276 } | |
| 277 | |
| 278 linestart = nextlinestart; | |
| 75 | 279 lineend = findeol(buf, linestart, bufend); |
| 15 | 280 linestartplace = nextlinestartplace; |
| 281 } | |
| 282 | |
| 28 | 283 if (toplevel) { |
| 284 directive_goteof(&linestartplace); | |
| 285 } | |
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286 dofree(buf, bufmax); |
| 15 | 287 } |
| 6 | 288 |
| 289 //////////////////////////////////////////////////////////// | |
| 290 // path search | |
| 291 | |
| 292 static | |
| 13 | 293 char * |
| 112 | 294 mkfilename(struct place *place, const char *dir, const char *file) |
| 13 | 295 { |
| 296 size_t dlen, flen, rlen; | |
| 297 char *ret; | |
| 298 bool needslash = false; | |
| 299 | |
| 112 | 300 if (dir == NULL) { |
| 301 dir = place_getparsedir(place); | |
| 302 } | |
| 303 | |
| 13 | 304 dlen = strlen(dir); |
| 305 flen = strlen(file); | |
| 306 if (dlen > 0 && dir[dlen-1] != '/') { | |
| 307 needslash = true; | |
| 308 } | |
| 309 | |
| 310 rlen = dlen + (needslash ? 1 : 0) + flen; | |
| 311 ret = domalloc(rlen + 1); | |
| 312 strcpy(ret, dir); | |
| 313 if (needslash) { | |
| 314 strcat(ret, "/"); | |
| 315 } | |
| 316 strcat(ret, file); | |
| 317 return ret; | |
| 318 } | |
| 319 | |
| 320 static | |
| 6 | 321 int |
| 322 file_tryopen(const char *file) | |
| 323 { | |
| 324 int fd; | |
| 325 | |
| 15 | 326 /* XXX check for non-regular files */ |
| 327 | |
| 6 | 328 fd = open(file, O_RDONLY); |
| 329 if (fd < 0) { | |
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330 if (errno != ENOENT && errno != ENOTDIR) { |
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331 warn("%s", file); |
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332 } |
| 6 | 333 return -1; |
| 334 } | |
| 15 | 335 |
| 6 | 336 return fd; |
| 337 } | |
| 338 | |
| 339 static | |
| 340 void | |
| 341 file_search(struct place *place, struct incdirarray *path, const char *name) | |
| 342 { | |
| 343 unsigned i, num; | |
| 344 struct incdir *id; | |
| 13 | 345 const struct placefile *pf; |
| 6 | 346 char *file; |
| 347 int fd; | |
| 348 | |
| 349 assert(place != NULL); | |
| 350 | |
| 104 | 351 if (name[0] == '/') { |
| 352 fd = file_tryopen(name); | |
| 6 | 353 if (fd >= 0) { |
| 104 | 354 pf = place_addfile(place, name, true); |
| 355 file_read(pf, fd, name, false); | |
| 6 | 356 close(fd); |
| 357 return; | |
| 358 } | |
| 104 | 359 } else { |
| 360 num = incdirarray_num(path); | |
| 361 for (i=0; i<num; i++) { | |
| 362 id = incdirarray_get(path, i); | |
| 112 | 363 file = mkfilename(place, id->name, name); |
| 104 | 364 fd = file_tryopen(file); |
| 365 if (fd >= 0) { | |
| 366 pf = place_addfile(place, file, id->issystem); | |
| 367 file_read(pf, fd, file, false); | |
| 368 dostrfree(file); | |
| 369 close(fd); | |
| 370 return; | |
| 371 } | |
| 372 dostrfree(file); | |
| 373 } | |
| 6 | 374 } |
| 375 complain(place, "Include file %s not found", name); | |
| 376 complain_fail(); | |
| 377 } | |
| 378 | |
| 379 void | |
| 380 file_readquote(struct place *place, const char *name) | |
| 381 { | |
| 382 file_search(place, "epath, name); | |
| 383 } | |
| 384 | |
| 385 void | |
| 386 file_readbracket(struct place *place, const char *name) | |
| 387 { | |
| 388 file_search(place, &bracketpath, name); | |
| 389 } | |
| 390 | |
| 391 void | |
| 392 file_readabsolute(struct place *place, const char *name) | |
| 393 { | |
| 13 | 394 const struct placefile *pf; |
| 6 | 395 int fd; |
| 396 | |
| 397 assert(place != NULL); | |
| 398 | |
| 24 | 399 if (name == NULL) { |
| 400 fd = STDIN_FILENO; | |
| 401 pf = place_addfile(place, "<standard-input>", false); | |
| 402 } else { | |
| 403 fd = file_tryopen(name); | |
| 404 if (fd < 0) { | |
| 405 warn("%s", name); | |
| 406 die(); | |
| 407 } | |
| 408 pf = place_addfile(place, name, false); | |
| 6 | 409 } |
| 24 | 410 |
| 28 | 411 file_read(pf, fd, name, true); |
| 24 | 412 |
| 413 if (name != NULL) { | |
| 414 close(fd); | |
| 415 } | |
| 6 | 416 } |