| 1 | /* $OpenBSD: eval.c,v 1.69 2011/03/24 11:23:08 espie Exp $ */ |
| 2 | /* $NetBSD: eval.c,v 1.7 1996/11/10 21:21:29 pk Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1989, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to Berkeley by |
| 9 | * Ozan Yigit at York University. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | * |
| 35 | * $FreeBSD: src/usr.bin/m4/eval.c,v 1.28 2012/11/17 01:54:24 svnexp Exp $ |
| 36 | */ |
| 37 | |
| 38 | |
| 39 | /* |
| 40 | * eval.c |
| 41 | * Facility: m4 macro processor |
| 42 | * by: oz |
| 43 | */ |
| 44 | |
| 45 | #include <sys/types.h> |
| 46 | #include <err.h> |
| 47 | #include <errno.h> |
| 48 | #include <limits.h> |
| 49 | #include <unistd.h> |
| 50 | #include <stdint.h> |
| 51 | #include <stdio.h> |
| 52 | #include <stdlib.h> |
| 53 | #include <stddef.h> |
| 54 | #include <string.h> |
| 55 | #include <fcntl.h> |
| 56 | #include "mdef.h" |
| 57 | #include "stdd.h" |
| 58 | #include "extern.h" |
| 59 | #include "pathnames.h" |
| 60 | |
| 61 | static void dodefn(const char *); |
| 62 | static void dopushdef(const char *, const char *); |
| 63 | static void dodump(const char *[], int); |
| 64 | static void dotrace(const char *[], int, int); |
| 65 | static void doifelse(const char *[], int); |
| 66 | static int doincl(const char *); |
| 67 | static int dopaste(const char *); |
| 68 | static void dochq(const char *[], int); |
| 69 | static void dochc(const char *[], int); |
| 70 | static void dom4wrap(const char *); |
| 71 | static void dodiv(int); |
| 72 | static void doundiv(const char *[], int); |
| 73 | static void dosub(const char *[], int); |
| 74 | static void map(char *, const char *, const char *, const char *); |
| 75 | static const char *handledash(char *, char *, const char *); |
| 76 | static void expand_builtin(const char *[], int, int); |
| 77 | static void expand_macro(const char *[], int); |
| 78 | static void dump_one_def(const char *, struct macro_definition *); |
| 79 | |
| 80 | unsigned long expansion_id; |
| 81 | |
| 82 | /* |
| 83 | * eval - eval all macros and builtins calls |
| 84 | * argc - number of elements in argv. |
| 85 | * argv - element vector : |
| 86 | * argv[0] = definition of a user |
| 87 | * macro or NULL if built-in. |
| 88 | * argv[1] = name of the macro or |
| 89 | * built-in. |
| 90 | * argv[2] = parameters to user-defined |
| 91 | * . macro or built-in. |
| 92 | * . |
| 93 | * |
| 94 | * A call in the form of macro-or-builtin() will result in: |
| 95 | * argv[0] = nullstr |
| 96 | * argv[1] = macro-or-builtin |
| 97 | * argv[2] = nullstr |
| 98 | * |
| 99 | * argc is 3 for macro-or-builtin() and 2 for macro-or-builtin |
| 100 | */ |
| 101 | void |
| 102 | eval(const char *argv[], int argc, int td, int is_traced) |
| 103 | { |
| 104 | size_t mark = SIZE_MAX; |
| 105 | |
| 106 | expansion_id++; |
| 107 | if (td & RECDEF) |
| 108 | m4errx(1, "expanding recursive definition for %s.", argv[1]); |
| 109 | if (is_traced) |
| 110 | mark = trace(argv, argc, infile + ilevel); |
| 111 | if (td == MACRTYPE) |
| 112 | expand_macro(argv, argc); |
| 113 | else |
| 114 | expand_builtin(argv, argc, td); |
| 115 | if (mark != SIZE_MAX) |
| 116 | finish_trace(mark); |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * expand_builtin - evaluate built-in macros. |
| 121 | */ |
| 122 | void |
| 123 | expand_builtin(const char *argv[], int argc, int td) |
| 124 | { |
| 125 | int c, n; |
| 126 | int ac; |
| 127 | static int sysval = 0; |
| 128 | |
| 129 | #ifdef DEBUG |
| 130 | printf("argc = %d\n", argc); |
| 131 | for (n = 0; n < argc; n++) |
| 132 | printf("argv[%d] = %s\n", n, argv[n]); |
| 133 | fflush(stdout); |
| 134 | #endif |
| 135 | |
| 136 | /* |
| 137 | * if argc == 3 and argv[2] is null, then we |
| 138 | * have macro-or-builtin() type call. We adjust |
| 139 | * argc to avoid further checking. |
| 140 | */ |
| 141 | /* we keep the initial value for those built-ins that differentiate |
| 142 | * between builtin() and builtin. |
| 143 | */ |
| 144 | ac = argc; |
| 145 | |
| 146 | if (argc == 3 && !*(argv[2]) && !mimic_gnu) |
| 147 | argc--; |
| 148 | |
| 149 | switch (td & TYPEMASK) { |
| 150 | |
| 151 | case DEFITYPE: |
| 152 | if (argc > 2) |
| 153 | dodefine(argv[2], (argc > 3) ? argv[3] : null); |
| 154 | break; |
| 155 | |
| 156 | case PUSDTYPE: |
| 157 | if (argc > 2) |
| 158 | dopushdef(argv[2], (argc > 3) ? argv[3] : null); |
| 159 | break; |
| 160 | |
| 161 | case DUMPTYPE: |
| 162 | dodump(argv, argc); |
| 163 | break; |
| 164 | |
| 165 | case TRACEONTYPE: |
| 166 | dotrace(argv, argc, 1); |
| 167 | break; |
| 168 | |
| 169 | case TRACEOFFTYPE: |
| 170 | dotrace(argv, argc, 0); |
| 171 | break; |
| 172 | |
| 173 | case EXPRTYPE: |
| 174 | /* |
| 175 | * doexpr - evaluate arithmetic |
| 176 | * expression |
| 177 | */ |
| 178 | { |
| 179 | int base = 10; |
| 180 | int maxdigits = 0; |
| 181 | const char *errstr; |
| 182 | |
| 183 | if (argc > 3) { |
| 184 | base = strtonum(argv[3], 2, 36, &errstr); |
| 185 | if (errstr) { |
| 186 | m4errx(1, "expr: base %s invalid.", argv[3]); |
| 187 | } |
| 188 | } |
| 189 | if (argc > 4) { |
| 190 | maxdigits = strtonum(argv[4], 0, INT_MAX, &errstr); |
| 191 | if (errstr) { |
| 192 | m4errx(1, "expr: maxdigits %s invalid.", argv[4]); |
| 193 | } |
| 194 | } |
| 195 | if (argc > 2) |
| 196 | pbnumbase(expr(argv[2]), base, maxdigits); |
| 197 | break; |
| 198 | } |
| 199 | |
| 200 | case IFELTYPE: |
| 201 | if (argc > 4) |
| 202 | doifelse(argv, argc); |
| 203 | break; |
| 204 | |
| 205 | case IFDFTYPE: |
| 206 | /* |
| 207 | * doifdef - select one of two |
| 208 | * alternatives based on the existence of |
| 209 | * another definition |
| 210 | */ |
| 211 | if (argc > 3) { |
| 212 | if (lookup_macro_definition(argv[2]) != NULL) |
| 213 | pbstr(argv[3]); |
| 214 | else if (argc > 4) |
| 215 | pbstr(argv[4]); |
| 216 | } |
| 217 | break; |
| 218 | |
| 219 | case LENGTYPE: |
| 220 | /* |
| 221 | * dolen - find the length of the |
| 222 | * argument |
| 223 | */ |
| 224 | pbnum((argc > 2) ? strlen(argv[2]) : 0); |
| 225 | break; |
| 226 | |
| 227 | case INCRTYPE: |
| 228 | /* |
| 229 | * doincr - increment the value of the |
| 230 | * argument |
| 231 | */ |
| 232 | if (argc > 2) |
| 233 | pbnum(atoi(argv[2]) + 1); |
| 234 | break; |
| 235 | |
| 236 | case DECRTYPE: |
| 237 | /* |
| 238 | * dodecr - decrement the value of the |
| 239 | * argument |
| 240 | */ |
| 241 | if (argc > 2) |
| 242 | pbnum(atoi(argv[2]) - 1); |
| 243 | break; |
| 244 | |
| 245 | case SYSCTYPE: |
| 246 | /* |
| 247 | * dosys - execute system command |
| 248 | */ |
| 249 | if (argc > 2) { |
| 250 | fflush(stdout); |
| 251 | sysval = system(argv[2]); |
| 252 | } |
| 253 | break; |
| 254 | |
| 255 | case SYSVTYPE: |
| 256 | /* |
| 257 | * dosysval - return value of the last |
| 258 | * system call. |
| 259 | * |
| 260 | */ |
| 261 | pbnum(sysval); |
| 262 | break; |
| 263 | |
| 264 | case ESYSCMDTYPE: |
| 265 | if (argc > 2) |
| 266 | doesyscmd(argv[2]); |
| 267 | break; |
| 268 | case INCLTYPE: |
| 269 | if (argc > 2) |
| 270 | if (!doincl(argv[2])) { |
| 271 | if (mimic_gnu) { |
| 272 | warn("%s at line %lu: include(%s)", |
| 273 | CURRENT_NAME, CURRENT_LINE, argv[2]); |
| 274 | exit_code = 1; |
| 275 | } else |
| 276 | err(1, "%s at line %lu: include(%s)", |
| 277 | CURRENT_NAME, CURRENT_LINE, argv[2]); |
| 278 | } |
| 279 | break; |
| 280 | |
| 281 | case SINCTYPE: |
| 282 | if (argc > 2) |
| 283 | doincl(argv[2]); |
| 284 | break; |
| 285 | #ifdef EXTENDED |
| 286 | case PASTTYPE: |
| 287 | if (argc > 2) |
| 288 | if (!dopaste(argv[2])) |
| 289 | err(1, "%s at line %lu: paste(%s)", |
| 290 | CURRENT_NAME, CURRENT_LINE, argv[2]); |
| 291 | break; |
| 292 | |
| 293 | case SPASTYPE: |
| 294 | if (argc > 2) |
| 295 | dopaste(argv[2]); |
| 296 | break; |
| 297 | case FORMATTYPE: |
| 298 | doformat(argv, argc); |
| 299 | break; |
| 300 | #endif |
| 301 | case CHNQTYPE: |
| 302 | dochq(argv, ac); |
| 303 | break; |
| 304 | |
| 305 | case CHNCTYPE: |
| 306 | dochc(argv, argc); |
| 307 | break; |
| 308 | |
| 309 | case SUBSTYPE: |
| 310 | /* |
| 311 | * dosub - select substring |
| 312 | * |
| 313 | */ |
| 314 | if (argc > 3) |
| 315 | dosub(argv, argc); |
| 316 | break; |
| 317 | |
| 318 | case SHIFTYPE: |
| 319 | /* |
| 320 | * doshift - push back all arguments |
| 321 | * except the first one (i.e. skip |
| 322 | * argv[2]) |
| 323 | */ |
| 324 | if (argc > 3) { |
| 325 | for (n = argc - 1; n > 3; n--) { |
| 326 | pbstr(rquote); |
| 327 | pbstr(argv[n]); |
| 328 | pbstr(lquote); |
| 329 | pushback(COMMA); |
| 330 | } |
| 331 | pbstr(rquote); |
| 332 | pbstr(argv[3]); |
| 333 | pbstr(lquote); |
| 334 | } |
| 335 | break; |
| 336 | |
| 337 | case DIVRTYPE: |
| 338 | if (argc > 2 && (n = atoi(argv[2])) != 0) |
| 339 | dodiv(n); |
| 340 | else { |
| 341 | active = stdout; |
| 342 | oindex = 0; |
| 343 | } |
| 344 | break; |
| 345 | |
| 346 | case UNDVTYPE: |
| 347 | doundiv(argv, argc); |
| 348 | break; |
| 349 | |
| 350 | case DIVNTYPE: |
| 351 | /* |
| 352 | * dodivnum - return the number of |
| 353 | * current output diversion |
| 354 | */ |
| 355 | pbnum(oindex); |
| 356 | break; |
| 357 | |
| 358 | case UNDFTYPE: |
| 359 | /* |
| 360 | * doundefine - undefine a previously |
| 361 | * defined macro(s) or m4 keyword(s). |
| 362 | */ |
| 363 | if (argc > 2) |
| 364 | for (n = 2; n < argc; n++) |
| 365 | macro_undefine(argv[n]); |
| 366 | break; |
| 367 | |
| 368 | case POPDTYPE: |
| 369 | /* |
| 370 | * dopopdef - remove the topmost |
| 371 | * definitions of macro(s) or m4 |
| 372 | * keyword(s). |
| 373 | */ |
| 374 | if (argc > 2) |
| 375 | for (n = 2; n < argc; n++) |
| 376 | macro_popdef(argv[n]); |
| 377 | break; |
| 378 | |
| 379 | case MKTMTYPE: |
| 380 | /* |
| 381 | * dotemp - create a temporary file |
| 382 | */ |
| 383 | if (argc > 2) { |
| 384 | int fd; |
| 385 | char *temp; |
| 386 | |
| 387 | temp = xstrdup(argv[2]); |
| 388 | |
| 389 | fd = mkstemp(temp); |
| 390 | if (fd == -1) |
| 391 | err(1, |
| 392 | "%s at line %lu: couldn't make temp file %s", |
| 393 | CURRENT_NAME, CURRENT_LINE, argv[2]); |
| 394 | close(fd); |
| 395 | pbstr(temp); |
| 396 | free(temp); |
| 397 | } |
| 398 | break; |
| 399 | |
| 400 | case TRNLTYPE: |
| 401 | /* |
| 402 | * dotranslit - replace all characters in |
| 403 | * the source string that appears in the |
| 404 | * "from" string with the corresponding |
| 405 | * characters in the "to" string. |
| 406 | */ |
| 407 | if (argc > 3) { |
| 408 | char *temp; |
| 409 | |
| 410 | temp = xalloc(strlen(argv[2]) + 1, NULL); |
| 411 | if (argc > 4) |
| 412 | map(temp, argv[2], argv[3], argv[4]); |
| 413 | else |
| 414 | map(temp, argv[2], argv[3], null); |
| 415 | pbstr(temp); |
| 416 | free(temp); |
| 417 | } else if (argc > 2) |
| 418 | pbstr(argv[2]); |
| 419 | break; |
| 420 | |
| 421 | case INDXTYPE: |
| 422 | /* |
| 423 | * doindex - find the index of the second |
| 424 | * argument string in the first argument |
| 425 | * string. -1 if not present. |
| 426 | */ |
| 427 | pbnum((argc > 3) ? indx(argv[2], argv[3]) : -1); |
| 428 | break; |
| 429 | |
| 430 | case ERRPTYPE: |
| 431 | /* |
| 432 | * doerrp - print the arguments to stderr |
| 433 | * file |
| 434 | */ |
| 435 | if (argc > 2) { |
| 436 | for (n = 2; n < argc; n++) |
| 437 | fprintf(stderr, "%s ", argv[n]); |
| 438 | fprintf(stderr, "\n"); |
| 439 | } |
| 440 | break; |
| 441 | |
| 442 | case DNLNTYPE: |
| 443 | /* |
| 444 | * dodnl - eat-up-to and including |
| 445 | * newline |
| 446 | */ |
| 447 | while ((c = gpbc()) != '\n' && c != EOF) |
| 448 | ; |
| 449 | break; |
| 450 | |
| 451 | case M4WRTYPE: |
| 452 | /* |
| 453 | * dom4wrap - set up for |
| 454 | * wrap-up/wind-down activity |
| 455 | */ |
| 456 | if (argc > 2) |
| 457 | dom4wrap(argv[2]); |
| 458 | break; |
| 459 | |
| 460 | case EXITTYPE: |
| 461 | /* |
| 462 | * doexit - immediate exit from m4. |
| 463 | */ |
| 464 | killdiv(); |
| 465 | exit((argc > 2) ? atoi(argv[2]) : 0); |
| 466 | break; |
| 467 | |
| 468 | case DEFNTYPE: |
| 469 | if (argc > 2) |
| 470 | for (n = 2; n < argc; n++) |
| 471 | dodefn(argv[n]); |
| 472 | break; |
| 473 | |
| 474 | case INDIRTYPE: /* Indirect call */ |
| 475 | if (argc > 2) |
| 476 | doindir(argv, argc); |
| 477 | break; |
| 478 | |
| 479 | case BUILTINTYPE: /* Builtins only */ |
| 480 | if (argc > 2) |
| 481 | dobuiltin(argv, argc); |
| 482 | break; |
| 483 | |
| 484 | case PATSTYPE: |
| 485 | if (argc > 2) |
| 486 | dopatsubst(argv, argc); |
| 487 | break; |
| 488 | case REGEXPTYPE: |
| 489 | if (argc > 2) |
| 490 | doregexp(argv, argc); |
| 491 | break; |
| 492 | case LINETYPE: |
| 493 | doprintlineno(infile+ilevel); |
| 494 | break; |
| 495 | case FILENAMETYPE: |
| 496 | doprintfilename(infile+ilevel); |
| 497 | break; |
| 498 | case SELFTYPE: |
| 499 | pbstr(rquote); |
| 500 | pbstr(argv[1]); |
| 501 | pbstr(lquote); |
| 502 | break; |
| 503 | default: |
| 504 | m4errx(1, "eval: major botch."); |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * expand_macro - user-defined macro expansion |
| 511 | */ |
| 512 | void |
| 513 | expand_macro(const char *argv[], int argc) |
| 514 | { |
| 515 | const char *t; |
| 516 | const char *p; |
| 517 | int n; |
| 518 | int argno; |
| 519 | |
| 520 | t = argv[0]; /* defn string as a whole */ |
| 521 | p = t; |
| 522 | while (*p) |
| 523 | p++; |
| 524 | p--; /* last character of defn */ |
| 525 | while (p > t) { |
| 526 | if (*(p - 1) != ARGFLAG) |
| 527 | PUSHBACK(*p); |
| 528 | else { |
| 529 | switch (*p) { |
| 530 | |
| 531 | case '#': |
| 532 | pbnum(argc - 2); |
| 533 | break; |
| 534 | case '0': |
| 535 | case '1': |
| 536 | case '2': |
| 537 | case '3': |
| 538 | case '4': |
| 539 | case '5': |
| 540 | case '6': |
| 541 | case '7': |
| 542 | case '8': |
| 543 | case '9': |
| 544 | if ((argno = *p - '0') < argc - 1) |
| 545 | pbstr(argv[argno + 1]); |
| 546 | break; |
| 547 | case '*': |
| 548 | if (argc > 2) { |
| 549 | for (n = argc - 1; n > 2; n--) { |
| 550 | pbstr(argv[n]); |
| 551 | pushback(COMMA); |
| 552 | } |
| 553 | pbstr(argv[2]); |
| 554 | } |
| 555 | break; |
| 556 | case '@': |
| 557 | if (argc > 2) { |
| 558 | for (n = argc - 1; n > 2; n--) { |
| 559 | pbstr(rquote); |
| 560 | pbstr(argv[n]); |
| 561 | pbstr(lquote); |
| 562 | pushback(COMMA); |
| 563 | } |
| 564 | pbstr(rquote); |
| 565 | pbstr(argv[2]); |
| 566 | pbstr(lquote); |
| 567 | } |
| 568 | break; |
| 569 | default: |
| 570 | PUSHBACK(*p); |
| 571 | PUSHBACK('$'); |
| 572 | break; |
| 573 | } |
| 574 | p--; |
| 575 | } |
| 576 | p--; |
| 577 | } |
| 578 | if (p == t) /* do last character */ |
| 579 | PUSHBACK(*p); |
| 580 | } |
| 581 | |
| 582 | |
| 583 | /* |
| 584 | * dodefine - install definition in the table |
| 585 | */ |
| 586 | void |
| 587 | dodefine(const char *name, const char *defn) |
| 588 | { |
| 589 | if (!*name && !mimic_gnu) |
| 590 | m4errx(1, "null definition."); |
| 591 | else |
| 592 | macro_define(name, defn); |
| 593 | } |
| 594 | |
| 595 | /* |
| 596 | * dodefn - push back a quoted definition of |
| 597 | * the given name. |
| 598 | */ |
| 599 | static void |
| 600 | dodefn(const char *name) |
| 601 | { |
| 602 | struct macro_definition *p; |
| 603 | |
| 604 | if ((p = lookup_macro_definition(name)) != NULL) { |
| 605 | if ((p->type & TYPEMASK) == MACRTYPE) { |
| 606 | pbstr(rquote); |
| 607 | pbstr(p->defn); |
| 608 | pbstr(lquote); |
| 609 | } else { |
| 610 | pbstr(p->defn); |
| 611 | pbstr(BUILTIN_MARKER); |
| 612 | } |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * dopushdef - install a definition in the hash table |
| 618 | * without removing a previous definition. Since |
| 619 | * each new entry is entered in *front* of the |
| 620 | * hash bucket, it hides a previous definition from |
| 621 | * lookup. |
| 622 | */ |
| 623 | static void |
| 624 | dopushdef(const char *name, const char *defn) |
| 625 | { |
| 626 | if (!*name && !mimic_gnu) |
| 627 | m4errx(1, "null definition."); |
| 628 | else |
| 629 | macro_pushdef(name, defn); |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * dump_one_def - dump the specified definition. |
| 634 | */ |
| 635 | static void |
| 636 | dump_one_def(const char *name, struct macro_definition *p) |
| 637 | { |
| 638 | if (!traceout) |
| 639 | traceout = stderr; |
| 640 | if (mimic_gnu) { |
| 641 | if ((p->type & TYPEMASK) == MACRTYPE) |
| 642 | fprintf(traceout, "%s:\t%s\n", name, p->defn); |
| 643 | else |
| 644 | fprintf(traceout, "%s:\t<%s>\n", name, p->defn); |
| 645 | } else |
| 646 | fprintf(traceout, "`%s'\t`%s'\n", name, p->defn); |
| 647 | } |
| 648 | |
| 649 | /* |
| 650 | * dodumpdef - dump the specified definitions in the hash |
| 651 | * table to stderr. If nothing is specified, the entire |
| 652 | * hash table is dumped. |
| 653 | */ |
| 654 | static void |
| 655 | dodump(const char *argv[], int argc) |
| 656 | { |
| 657 | int n; |
| 658 | struct macro_definition *p; |
| 659 | |
| 660 | if (argc > 2) { |
| 661 | for (n = 2; n < argc; n++) |
| 662 | if ((p = lookup_macro_definition(argv[n])) != NULL) |
| 663 | dump_one_def(argv[n], p); |
| 664 | } else |
| 665 | macro_for_all(dump_one_def); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * dotrace - mark some macros as traced/untraced depending upon on. |
| 670 | */ |
| 671 | static void |
| 672 | dotrace(const char *argv[], int argc, int on) |
| 673 | { |
| 674 | int n; |
| 675 | |
| 676 | if (argc > 2) { |
| 677 | for (n = 2; n < argc; n++) |
| 678 | mark_traced(argv[n], on); |
| 679 | } else |
| 680 | mark_traced(NULL, on); |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * doifelse - select one of two alternatives - loop. |
| 685 | */ |
| 686 | static void |
| 687 | doifelse(const char *argv[], int argc) |
| 688 | { |
| 689 | for(;;) { |
| 690 | if (STREQ(argv[2], argv[3])) |
| 691 | pbstr(argv[4]); |
| 692 | else if (argc == 6) |
| 693 | pbstr(argv[5]); |
| 694 | else if (argc > 6) { |
| 695 | argv += 3; |
| 696 | argc -= 3; |
| 697 | continue; |
| 698 | } |
| 699 | break; |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | /* |
| 704 | * doinclude - include a given file. |
| 705 | */ |
| 706 | static int |
| 707 | doincl(const char *ifile) |
| 708 | { |
| 709 | if (ilevel + 1 == MAXINP) |
| 710 | m4errx(1, "too many include files."); |
| 711 | if (fopen_trypath(infile + ilevel + 1, ifile) != NULL) { |
| 712 | ilevel++; |
| 713 | bbase[ilevel] = bufbase = bp; |
| 714 | return (1); |
| 715 | } else |
| 716 | return (0); |
| 717 | } |
| 718 | |
| 719 | #ifdef EXTENDED |
| 720 | /* |
| 721 | * dopaste - include a given file without any |
| 722 | * macro processing. |
| 723 | */ |
| 724 | static int |
| 725 | dopaste(const char *pfile) |
| 726 | { |
| 727 | FILE *pf; |
| 728 | int c; |
| 729 | |
| 730 | if ((pf = fopen(pfile, "r")) != NULL) { |
| 731 | if (synch_lines) |
| 732 | fprintf(active, "#line 1 \"%s\"\n", pfile); |
| 733 | while ((c = getc(pf)) != EOF) |
| 734 | putc(c, active); |
| 735 | fclose(pf); |
| 736 | emit_synchline(); |
| 737 | return (1); |
| 738 | } else |
| 739 | return (0); |
| 740 | } |
| 741 | #endif |
| 742 | |
| 743 | /* |
| 744 | * dochq - change quote characters |
| 745 | */ |
| 746 | static void |
| 747 | dochq(const char *argv[], int ac) |
| 748 | { |
| 749 | if (ac == 2) { |
| 750 | lquote[0] = LQUOTE; lquote[1] = EOS; |
| 751 | rquote[0] = RQUOTE; rquote[1] = EOS; |
| 752 | } else { |
| 753 | strlcpy(lquote, argv[2], sizeof(lquote)); |
| 754 | if (ac > 3) { |
| 755 | strlcpy(rquote, argv[3], sizeof(rquote)); |
| 756 | } else { |
| 757 | rquote[0] = ECOMMT; rquote[1] = EOS; |
| 758 | } |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | /* |
| 763 | * dochc - change comment characters |
| 764 | */ |
| 765 | static void |
| 766 | dochc(const char *argv[], int argc) |
| 767 | { |
| 768 | /* XXX Note that there is no difference between no argument and a single |
| 769 | * empty argument. |
| 770 | */ |
| 771 | if (argc == 2) { |
| 772 | scommt[0] = EOS; |
| 773 | ecommt[0] = EOS; |
| 774 | } else { |
| 775 | strlcpy(scommt, argv[2], sizeof(scommt)); |
| 776 | if (argc == 3) { |
| 777 | ecommt[0] = ECOMMT; ecommt[1] = EOS; |
| 778 | } else { |
| 779 | strlcpy(ecommt, argv[3], sizeof(ecommt)); |
| 780 | } |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | * dom4wrap - expand text at EOF |
| 786 | */ |
| 787 | static void |
| 788 | dom4wrap(const char *text) |
| 789 | { |
| 790 | if (wrapindex >= maxwraps) { |
| 791 | if (maxwraps == 0) |
| 792 | maxwraps = 16; |
| 793 | else |
| 794 | maxwraps *= 2; |
| 795 | m4wraps = xrealloc(m4wraps, maxwraps * sizeof(*m4wraps), |
| 796 | "too many m4wraps"); |
| 797 | } |
| 798 | m4wraps[wrapindex++] = xstrdup(text); |
| 799 | } |
| 800 | |
| 801 | /* |
| 802 | * dodivert - divert the output to a temporary file |
| 803 | */ |
| 804 | static void |
| 805 | dodiv(int n) |
| 806 | { |
| 807 | int fd; |
| 808 | |
| 809 | oindex = n; |
| 810 | if (n >= maxout) { |
| 811 | if (mimic_gnu) |
| 812 | resizedivs(n + 10); |
| 813 | else |
| 814 | n = 0; /* bitbucket */ |
| 815 | } |
| 816 | |
| 817 | if (n < 0) |
| 818 | n = 0; /* bitbucket */ |
| 819 | if (outfile[n] == NULL) { |
| 820 | char fname[] = _PATH_DIVNAME; |
| 821 | |
| 822 | if ((fd = mkstemp(fname)) < 0 || |
| 823 | (outfile[n] = fdopen(fd, "w+")) == NULL) |
| 824 | err(1, "%s: cannot divert", fname); |
| 825 | if (unlink(fname) == -1) |
| 826 | err(1, "%s: cannot unlink", fname); |
| 827 | } |
| 828 | active = outfile[n]; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * doundivert - undivert a specified output, or all |
| 833 | * other outputs, in numerical order. |
| 834 | */ |
| 835 | static void |
| 836 | doundiv(const char *argv[], int argc) |
| 837 | { |
| 838 | int ind; |
| 839 | int n; |
| 840 | |
| 841 | if (argc > 2) { |
| 842 | for (ind = 2; ind < argc; ind++) { |
| 843 | const char *errstr; |
| 844 | n = strtonum(argv[ind], 1, INT_MAX, &errstr); |
| 845 | if (errstr) { |
| 846 | if (errno == EINVAL && mimic_gnu) |
| 847 | getdivfile(argv[ind]); |
| 848 | } else { |
| 849 | if (n < maxout && outfile[n] != NULL) |
| 850 | getdiv(n); |
| 851 | } |
| 852 | } |
| 853 | } |
| 854 | else |
| 855 | for (n = 1; n < maxout; n++) |
| 856 | if (outfile[n] != NULL) |
| 857 | getdiv(n); |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | * dosub - select substring |
| 862 | */ |
| 863 | static void |
| 864 | dosub(const char *argv[], int argc) |
| 865 | { |
| 866 | const char *ap, *fc, *k; |
| 867 | int nc; |
| 868 | |
| 869 | ap = argv[2]; /* target string */ |
| 870 | #ifdef EXPR |
| 871 | fc = ap + expr(argv[3]); /* first char */ |
| 872 | #else |
| 873 | fc = ap + atoi(argv[3]); /* first char */ |
| 874 | #endif |
| 875 | nc = strlen(fc); |
| 876 | if (argc >= 5) |
| 877 | #ifdef EXPR |
| 878 | nc = min(nc, expr(argv[4])); |
| 879 | #else |
| 880 | nc = min(nc, atoi(argv[4])); |
| 881 | #endif |
| 882 | if (fc >= ap && fc < ap + strlen(ap)) |
| 883 | for (k = fc + nc - 1; k >= fc; k--) |
| 884 | pushback(*k); |
| 885 | } |
| 886 | |
| 887 | /* |
| 888 | * map: |
| 889 | * map every character of s1 that is specified in from |
| 890 | * into s3 and replace in s. (source s1 remains untouched) |
| 891 | * |
| 892 | * This is derived from the a standard implementation of map(s,from,to) |
| 893 | * function of ICON language. Within mapvec, we replace every character |
| 894 | * of "from" with the corresponding character in "to". |
| 895 | * If "to" is shorter than "from", than the corresponding entries are null, |
| 896 | * which means that those characters dissapear altogether. |
| 897 | */ |
| 898 | static void |
| 899 | map(char *dest, const char *src, const char *from, const char *to) |
| 900 | { |
| 901 | const char *tmp; |
| 902 | unsigned char sch, dch; |
| 903 | static char frombis[257]; |
| 904 | static char tobis[257]; |
| 905 | int i; |
| 906 | char seen[256]; |
| 907 | static unsigned char mapvec[256] = { |
| 908 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, |
| 909 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, |
| 910 | 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, |
| 911 | 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, |
| 912 | 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, |
| 913 | 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, |
| 914 | 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, |
| 915 | 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, |
| 916 | 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, |
| 917 | 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, |
| 918 | 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, |
| 919 | 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, |
| 920 | 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, |
| 921 | 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, |
| 922 | 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, |
| 923 | 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, |
| 924 | 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, |
| 925 | 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 |
| 926 | }; |
| 927 | |
| 928 | if (*src) { |
| 929 | if (mimic_gnu) { |
| 930 | /* |
| 931 | * expand character ranges on the fly |
| 932 | */ |
| 933 | from = handledash(frombis, frombis + 256, from); |
| 934 | to = handledash(tobis, tobis + 256, to); |
| 935 | } |
| 936 | tmp = from; |
| 937 | /* |
| 938 | * create a mapping between "from" and |
| 939 | * "to" |
| 940 | */ |
| 941 | for (i = 0; i < 256; i++) |
| 942 | seen[i] = 0; |
| 943 | while (*from) { |
| 944 | if (!seen[(unsigned char)(*from)]) { |
| 945 | mapvec[(unsigned char)(*from)] = (unsigned char)(*to); |
| 946 | seen[(unsigned char)(*from)] = 1; |
| 947 | } |
| 948 | from++; |
| 949 | if (*to) |
| 950 | to++; |
| 951 | } |
| 952 | |
| 953 | while (*src) { |
| 954 | sch = (unsigned char)(*src++); |
| 955 | dch = mapvec[sch]; |
| 956 | if ((*dest = (char)dch)) |
| 957 | dest++; |
| 958 | } |
| 959 | /* |
| 960 | * restore all the changed characters |
| 961 | */ |
| 962 | while (*tmp) { |
| 963 | mapvec[(unsigned char)(*tmp)] = (unsigned char)(*tmp); |
| 964 | tmp++; |
| 965 | } |
| 966 | } |
| 967 | *dest = '\0'; |
| 968 | } |
| 969 | |
| 970 | |
| 971 | /* |
| 972 | * handledash: |
| 973 | * use buffer to copy the src string, expanding character ranges |
| 974 | * on the way. |
| 975 | */ |
| 976 | static const char * |
| 977 | handledash(char *buffer, char *end, const char *src) |
| 978 | { |
| 979 | char *p; |
| 980 | |
| 981 | p = buffer; |
| 982 | while(*src) { |
| 983 | if (src[1] == '-' && src[2]) { |
| 984 | unsigned char i; |
| 985 | if ((unsigned char)src[0] <= (unsigned char)src[2]) { |
| 986 | for (i = (unsigned char)src[0]; |
| 987 | i <= (unsigned char)src[2]; i++) { |
| 988 | *p++ = i; |
| 989 | if (p == end) { |
| 990 | *p = '\0'; |
| 991 | return buffer; |
| 992 | } |
| 993 | } |
| 994 | } else { |
| 995 | for (i = (unsigned char)src[0]; |
| 996 | i >= (unsigned char)src[2]; i--) { |
| 997 | *p++ = i; |
| 998 | if (p == end) { |
| 999 | *p = '\0'; |
| 1000 | return buffer; |
| 1001 | } |
| 1002 | } |
| 1003 | } |
| 1004 | src += 3; |
| 1005 | } else |
| 1006 | *p++ = *src++; |
| 1007 | if (p == end) |
| 1008 | break; |
| 1009 | } |
| 1010 | *p = '\0'; |
| 1011 | return buffer; |
| 1012 | } |