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1.74 ! millert 1: /* $OpenBSD: eval.c,v 1.73 2014/07/11 21:04:17 espie Exp $ */
1.7 millert 2: /* $NetBSD: eval.c,v 1.7 1996/11/10 21:21:29 pk Exp $ */
1.1 deraadt 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.
1.47 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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:
36: /*
37: * eval.c
38: * Facility: m4 macro processor
39: * by: oz
40: */
41:
42: #include <sys/types.h>
1.63 espie 43: #include <err.h>
1.1 deraadt 44: #include <errno.h>
1.56 espie 45: #include <limits.h>
1.1 deraadt 46: #include <unistd.h>
47: #include <stdio.h>
1.74 ! millert 48: #include <stdint.h>
1.1 deraadt 49: #include <stdlib.h>
1.13 espie 50: #include <stddef.h>
1.1 deraadt 51: #include <string.h>
1.6 millert 52: #include <fcntl.h>
1.1 deraadt 53: #include "mdef.h"
54: #include "stdd.h"
55: #include "extern.h"
56: #include "pathnames.h"
57:
1.43 millert 58: static void dodefn(const char *);
59: static void dopushdef(const char *, const char *);
60: static void dodump(const char *[], int);
61: static void dotrace(const char *[], int, int);
62: static void doifelse(const char *[], int);
63: static int doincl(const char *);
64: static int dopaste(const char *);
65: static void dochq(const char *[], int);
66: static void dochc(const char *[], int);
1.55 espie 67: static void dom4wrap(const char *);
1.43 millert 68: static void dodiv(int);
69: static void doundiv(const char *[], int);
70: static void dosub(const char *[], int);
71: static void map(char *, const char *, const char *, const char *);
72: static const char *handledash(char *, char *, const char *);
73: static void expand_builtin(const char *[], int, int);
74: static void expand_macro(const char *[], int);
1.49 espie 75: static void dump_one_def(const char *, struct macro_definition *);
1.30 espie 76:
1.34 espie 77: unsigned long expansion_id;
1.30 espie 78:
1.1 deraadt 79: /*
1.30 espie 80: * eval - eval all macros and builtins calls
1.39 espie 81: * argc - number of elements in argv.
82: * argv - element vector :
83: * argv[0] = definition of a user
1.49 espie 84: * macro or NULL if built-in.
1.39 espie 85: * argv[1] = name of the macro or
86: * built-in.
87: * argv[2] = parameters to user-defined
88: * . macro or built-in.
89: * .
90: *
91: * A call in the form of macro-or-builtin() will result in:
92: * argv[0] = nullstr
93: * argv[1] = macro-or-builtin
94: * argv[2] = nullstr
95: *
96: * argc is 3 for macro-or-builtin() and 2 for macro-or-builtin
1.30 espie 97: */
98: void
1.50 espie 99: eval(const char *argv[], int argc, int td, int is_traced)
1.30 espie 100: {
1.59 espie 101: size_t mark = SIZE_MAX;
1.35 espie 102:
1.34 espie 103: expansion_id++;
1.68 marco 104: if (td & RECDEF)
1.60 espie 105: m4errx(1, "expanding recursive definition for %s.", argv[1]);
1.50 espie 106: if (is_traced)
1.35 espie 107: mark = trace(argv, argc, infile+ilevel);
1.30 espie 108: if (td == MACRTYPE)
109: expand_macro(argv, argc);
110: else
111: expand_builtin(argv, argc, td);
1.68 marco 112: if (mark != SIZE_MAX)
1.35 espie 113: finish_trace(mark);
1.30 espie 114: }
115:
116: /*
117: * expand_builtin - evaluate built-in macros.
1.1 deraadt 118: */
119: void
1.44 espie 120: expand_builtin(const char *argv[], int argc, int td)
1.1 deraadt 121: {
1.17 espie 122: int c, n;
1.39 espie 123: int ac;
1.1 deraadt 124: static int sysval = 0;
125:
126: #ifdef DEBUG
127: printf("argc = %d\n", argc);
128: for (n = 0; n < argc; n++)
129: printf("argv[%d] = %s\n", n, argv[n]);
1.42 espie 130: fflush(stdout);
1.1 deraadt 131: #endif
1.22 espie 132:
1.1 deraadt 133: /*
134: * if argc == 3 and argv[2] is null, then we
135: * have macro-or-builtin() type call. We adjust
136: * argc to avoid further checking..
137: */
1.58 espie 138: /* we keep the initial value for those built-ins that differentiate
139: * between builtin() and builtin.
140: */
1.68 marco 141: ac = argc;
1.39 espie 142:
1.66 espie 143: if (argc == 3 && !*(argv[2]) && !mimic_gnu)
1.1 deraadt 144: argc--;
145:
1.22 espie 146: switch (td & TYPEMASK) {
1.1 deraadt 147:
148: case DEFITYPE:
149: if (argc > 2)
150: dodefine(argv[2], (argc > 3) ? argv[3] : null);
151: break;
152:
153: case PUSDTYPE:
154: if (argc > 2)
155: dopushdef(argv[2], (argc > 3) ? argv[3] : null);
156: break;
157:
158: case DUMPTYPE:
159: dodump(argv, argc);
160: break;
161:
1.37 espie 162: case TRACEONTYPE:
163: dotrace(argv, argc, 1);
164: break;
165:
166: case TRACEOFFTYPE:
167: dotrace(argv, argc, 0);
168: break;
169:
1.1 deraadt 170: case EXPRTYPE:
171: /*
172: * doexpr - evaluate arithmetic
173: * expression
174: */
1.56 espie 175: {
176: int base = 10;
177: int maxdigits = 0;
178: const char *errstr;
179:
180: if (argc > 3) {
181: base = strtonum(argv[3], 2, 36, &errstr);
182: if (errstr) {
1.60 espie 183: m4errx(1, "expr: base %s invalid.", argv[3]);
1.56 espie 184: }
185: }
186: if (argc > 4) {
187: maxdigits = strtonum(argv[4], 0, INT_MAX, &errstr);
188: if (errstr) {
1.60 espie 189: m4errx(1, "expr: maxdigits %s invalid.", argv[4]);
1.56 espie 190: }
191: }
1.1 deraadt 192: if (argc > 2)
1.56 espie 193: pbnumbase(expr(argv[2]), base, maxdigits);
1.1 deraadt 194: break;
1.56 espie 195: }
1.1 deraadt 196:
197: case IFELTYPE:
198: if (argc > 4)
199: doifelse(argv, argc);
200: break;
201:
202: case IFDFTYPE:
203: /*
204: * doifdef - select one of two
205: * alternatives based on the existence of
206: * another definition
207: */
208: if (argc > 3) {
1.49 espie 209: if (lookup_macro_definition(argv[2]) != NULL)
1.1 deraadt 210: pbstr(argv[3]);
211: else if (argc > 4)
212: pbstr(argv[4]);
213: }
214: break;
215:
216: case LENGTYPE:
217: /*
218: * dolen - find the length of the
219: * argument
220: */
1.18 espie 221: pbnum((argc > 2) ? strlen(argv[2]) : 0);
1.1 deraadt 222: break;
223:
224: case INCRTYPE:
225: /*
226: * doincr - increment the value of the
227: * argument
228: */
229: if (argc > 2)
230: pbnum(atoi(argv[2]) + 1);
231: break;
232:
233: case DECRTYPE:
234: /*
235: * dodecr - decrement the value of the
236: * argument
237: */
238: if (argc > 2)
239: pbnum(atoi(argv[2]) - 1);
240: break;
241:
242: case SYSCTYPE:
243: /*
244: * dosys - execute system command
245: */
1.54 robert 246: if (argc > 2) {
247: fflush(stdout);
1.1 deraadt 248: sysval = system(argv[2]);
1.54 robert 249: }
1.1 deraadt 250: break;
251:
252: case SYSVTYPE:
253: /*
254: * dosysval - return value of the last
255: * system call.
1.68 marco 256: *
1.1 deraadt 257: */
258: pbnum(sysval);
259: break;
260:
1.27 espie 261: case ESYSCMDTYPE:
262: if (argc > 2)
263: doesyscmd(argv[2]);
1.68 marco 264: break;
1.1 deraadt 265: case INCLTYPE:
1.71 deraadt 266: if (argc > 2) {
267: if (!doincl(argv[2])) {
1.70 espie 268: if (mimic_gnu) {
269: warn("%s at line %lu: include(%s)",
270: CURRENT_NAME, CURRENT_LINE, argv[2]);
271: exit_code = 1;
272: } else
273: err(1, "%s at line %lu: include(%s)",
274: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.71 deraadt 275: }
276: }
1.1 deraadt 277: break;
278:
279: case SINCTYPE:
280: if (argc > 2)
281: (void) doincl(argv[2]);
282: break;
283: #ifdef EXTENDED
284: case PASTTYPE:
285: if (argc > 2)
286: if (!dopaste(argv[2]))
1.24 espie 287: err(1, "%s at line %lu: paste(%s)",
288: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.1 deraadt 289: break;
290:
291: case SPASTYPE:
292: if (argc > 2)
293: (void) dopaste(argv[2]);
1.61 espie 294: break;
295: case FORMATTYPE:
1.62 espie 296: doformat(argv, argc);
1.1 deraadt 297: break;
298: #endif
299: case CHNQTYPE:
1.58 espie 300: dochq(argv, ac);
1.1 deraadt 301: break;
302:
303: case CHNCTYPE:
1.58 espie 304: dochc(argv, argc);
1.1 deraadt 305: break;
306:
307: case SUBSTYPE:
308: /*
309: * dosub - select substring
1.68 marco 310: *
1.1 deraadt 311: */
312: if (argc > 3)
313: dosub(argv, argc);
314: break;
315:
316: case SHIFTYPE:
317: /*
318: * doshift - push back all arguments
319: * except the first one (i.e. skip
320: * argv[2])
321: */
322: if (argc > 3) {
323: for (n = argc - 1; n > 3; n--) {
1.10 deraadt 324: pbstr(rquote);
1.1 deraadt 325: pbstr(argv[n]);
1.10 deraadt 326: pbstr(lquote);
1.58 espie 327: pushback(COMMA);
1.1 deraadt 328: }
1.10 deraadt 329: pbstr(rquote);
1.1 deraadt 330: pbstr(argv[3]);
1.10 deraadt 331: pbstr(lquote);
1.1 deraadt 332: }
333: break;
334:
335: case DIVRTYPE:
336: if (argc > 2 && (n = atoi(argv[2])) != 0)
337: dodiv(n);
338: else {
339: active = stdout;
340: oindex = 0;
341: }
342: break;
343:
344: case UNDVTYPE:
345: doundiv(argv, argc);
346: break;
347:
348: case DIVNTYPE:
349: /*
350: * dodivnum - return the number of
351: * current output diversion
352: */
353: pbnum(oindex);
354: break;
355:
356: case UNDFTYPE:
357: /*
358: * doundefine - undefine a previously
359: * defined macro(s) or m4 keyword(s).
360: */
361: if (argc > 2)
362: for (n = 2; n < argc; n++)
1.49 espie 363: macro_undefine(argv[n]);
1.1 deraadt 364: break;
365:
366: case POPDTYPE:
367: /*
368: * dopopdef - remove the topmost
369: * definitions of macro(s) or m4
370: * keyword(s).
371: */
372: if (argc > 2)
373: for (n = 2; n < argc; n++)
1.49 espie 374: macro_popdef(argv[n]);
1.1 deraadt 375: break;
376:
377: case MKTMTYPE:
378: /*
379: * dotemp - create a temporary file
380: */
1.16 espie 381: if (argc > 2) {
382: int fd;
1.20 espie 383: char *temp;
384:
385: temp = xstrdup(argv[2]);
1.68 marco 386:
1.20 espie 387: fd = mkstemp(temp);
1.16 espie 388: if (fd == -1)
1.68 marco 389: err(1,
390: "%s at line %lu: couldn't make temp file %s",
1.24 espie 391: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.16 espie 392: close(fd);
1.20 espie 393: pbstr(temp);
394: free(temp);
1.16 espie 395: }
1.1 deraadt 396: break;
397:
398: case TRNLTYPE:
399: /*
400: * dotranslit - replace all characters in
401: * the source string that appears in the
402: * "from" string with the corresponding
403: * characters in the "to" string.
404: */
405: if (argc > 3) {
1.42 espie 406: char *temp;
407:
1.51 espie 408: temp = xalloc(strlen(argv[2])+1, NULL);
1.1 deraadt 409: if (argc > 4)
410: map(temp, argv[2], argv[3], argv[4]);
411: else
412: map(temp, argv[2], argv[3], null);
413: pbstr(temp);
1.42 espie 414: free(temp);
1.8 deraadt 415: } else if (argc > 2)
1.1 deraadt 416: pbstr(argv[2]);
417: break;
418:
419: case INDXTYPE:
420: /*
421: * doindex - find the index of the second
422: * argument string in the first argument
423: * string. -1 if not present.
424: */
425: pbnum((argc > 3) ? indx(argv[2], argv[3]) : -1);
426: break;
427:
428: case ERRPTYPE:
429: /*
430: * doerrp - print the arguments to stderr
431: * file
432: */
433: if (argc > 2) {
434: for (n = 2; n < argc; n++)
435: fprintf(stderr, "%s ", argv[n]);
436: fprintf(stderr, "\n");
437: }
438: break;
439:
440: case DNLNTYPE:
441: /*
442: * dodnl - eat-up-to and including
443: * newline
444: */
445: while ((c = gpbc()) != '\n' && c != EOF)
446: ;
447: break;
448:
449: case M4WRTYPE:
450: /*
451: * dom4wrap - set up for
452: * wrap-up/wind-down activity
453: */
1.55 espie 454: if (argc > 2)
455: dom4wrap(argv[2]);
1.1 deraadt 456: break;
457:
458: case EXITTYPE:
459: /*
460: * doexit - immediate exit from m4.
461: */
462: killdiv();
463: exit((argc > 2) ? atoi(argv[2]) : 0);
464: break;
465:
466: case DEFNTYPE:
467: if (argc > 2)
468: for (n = 2; n < argc; n++)
469: dodefn(argv[n]);
470: break;
471:
1.25 espie 472: case INDIRTYPE: /* Indirect call */
473: if (argc > 2)
474: doindir(argv, argc);
475: break;
1.68 marco 476:
1.25 espie 477: case BUILTINTYPE: /* Builtins only */
478: if (argc > 2)
479: dobuiltin(argv, argc);
480: break;
481:
482: case PATSTYPE:
483: if (argc > 2)
484: dopatsubst(argv, argc);
485: break;
486: case REGEXPTYPE:
487: if (argc > 2)
488: doregexp(argv, argc);
489: break;
490: case LINETYPE:
491: doprintlineno(infile+ilevel);
492: break;
493: case FILENAMETYPE:
494: doprintfilename(infile+ilevel);
495: break;
1.23 espie 496: case SELFTYPE:
497: pbstr(rquote);
498: pbstr(argv[1]);
499: pbstr(lquote);
500: break;
1.1 deraadt 501: default:
1.60 espie 502: m4errx(1, "eval: major botch.");
1.1 deraadt 503: break;
504: }
505: }
506:
507: /*
1.30 espie 508: * expand_macro - user-defined macro expansion
1.1 deraadt 509: */
510: void
1.44 espie 511: expand_macro(const char *argv[], int argc)
1.1 deraadt 512: {
1.20 espie 513: const char *t;
514: const char *p;
1.17 espie 515: int n;
516: int argno;
1.1 deraadt 517:
518: t = argv[0]; /* defn string as a whole */
519: p = t;
520: while (*p)
521: p++;
522: p--; /* last character of defn */
523: while (p > t) {
524: if (*(p - 1) != ARGFLAG)
1.58 espie 525: PUSHBACK(*p);
1.1 deraadt 526: else {
527: switch (*p) {
528:
529: case '#':
530: pbnum(argc - 2);
531: break;
532: case '0':
533: case '1':
534: case '2':
535: case '3':
536: case '4':
537: case '5':
538: case '6':
539: case '7':
540: case '8':
541: case '9':
542: if ((argno = *p - '0') < argc - 1)
543: pbstr(argv[argno + 1]);
544: break;
545: case '*':
1.41 espie 546: if (argc > 2) {
547: for (n = argc - 1; n > 2; n--) {
548: pbstr(argv[n]);
1.58 espie 549: pushback(COMMA);
1.41 espie 550: }
551: pbstr(argv[2]);
1.68 marco 552: }
1.1 deraadt 553: break;
1.7 millert 554: case '@':
1.41 espie 555: if (argc > 2) {
556: for (n = argc - 1; n > 2; n--) {
557: pbstr(rquote);
558: pbstr(argv[n]);
559: pbstr(lquote);
1.58 espie 560: pushback(COMMA);
1.41 espie 561: }
562: pbstr(rquote);
563: pbstr(argv[2]);
564: pbstr(lquote);
565: }
1.7 millert 566: break;
1.1 deraadt 567: default:
1.58 espie 568: PUSHBACK(*p);
569: PUSHBACK('$');
1.1 deraadt 570: break;
571: }
572: p--;
573: }
574: p--;
575: }
576: if (p == t) /* do last character */
1.58 espie 577: PUSHBACK(*p);
1.1 deraadt 578: }
579:
1.48 espie 580:
1.1 deraadt 581: /*
1.48 espie 582: * dodefine - install definition in the table
583: */
584: void
585: dodefine(const char *name, const char *defn)
586: {
1.66 espie 587: if (!*name && !mimic_gnu)
1.60 espie 588: m4errx(1, "null definition.");
1.68 marco 589: else
1.66 espie 590: macro_define(name, defn);
1.1 deraadt 591: }
592:
593: /*
594: * dodefn - push back a quoted definition of
595: * the given name.
596: */
1.20 espie 597: static void
1.44 espie 598: dodefn(const char *name)
1.1 deraadt 599: {
1.49 espie 600: struct macro_definition *p;
1.1 deraadt 601:
1.49 espie 602: if ((p = lookup_macro_definition(name)) != NULL) {
1.48 espie 603: if ((p->type & TYPEMASK) == MACRTYPE) {
1.40 espie 604: pbstr(rquote);
605: pbstr(p->defn);
606: pbstr(lquote);
1.48 espie 607: } else {
608: pbstr(p->defn);
1.31 espie 609: pbstr(BUILTIN_MARKER);
610: }
1.1 deraadt 611: }
612: }
613:
614: /*
615: * dopushdef - install a definition in the hash table
616: * without removing a previous definition. Since
617: * each new entry is entered in *front* of the
618: * hash bucket, it hides a previous definition from
619: * lookup.
620: */
1.20 espie 621: static void
1.44 espie 622: dopushdef(const char *name, const char *defn)
1.1 deraadt 623: {
1.66 espie 624: if (!*name && !mimic_gnu)
1.60 espie 625: m4errx(1, "null definition.");
1.66 espie 626: else
627: macro_pushdef(name, defn);
1.1 deraadt 628: }
629:
630: /*
1.32 espie 631: * dump_one_def - dump the specified definition.
632: */
633: static void
1.49 espie 634: dump_one_def(const char *name, struct macro_definition *p)
1.32 espie 635: {
1.53 espie 636: if (!traceout)
637: traceout = stderr;
1.33 espie 638: if (mimic_gnu) {
639: if ((p->type & TYPEMASK) == MACRTYPE)
1.49 espie 640: fprintf(traceout, "%s:\t%s\n", name, p->defn);
1.33 espie 641: else {
1.49 espie 642: fprintf(traceout, "%s:\t<%s>\n", name, p->defn);
1.68 marco 643: }
1.33 espie 644: } else
1.49 espie 645: fprintf(traceout, "`%s'\t`%s'\n", name, p->defn);
1.32 espie 646: }
647:
648: /*
1.1 deraadt 649: * dodumpdef - dump the specified definitions in the hash
650: * table to stderr. If nothing is specified, the entire
651: * hash table is dumped.
652: */
1.20 espie 653: static void
1.44 espie 654: dodump(const char *argv[], int argc)
1.1 deraadt 655: {
1.17 espie 656: int n;
1.49 espie 657: struct macro_definition *p;
1.1 deraadt 658:
659: if (argc > 2) {
660: for (n = 2; n < argc; n++)
1.49 espie 661: if ((p = lookup_macro_definition(argv[n])) != NULL)
662: dump_one_def(argv[n], p);
663: } else
664: macro_for_all(dump_one_def);
1.37 espie 665: }
666:
667: /*
668: * dotrace - mark some macros as traced/untraced depending upon on.
669: */
670: static void
1.44 espie 671: dotrace(const char *argv[], int argc, int on)
1.37 espie 672: {
673: int n;
674:
675: if (argc > 2) {
676: for (n = 2; n < argc; n++)
677: mark_traced(argv[n], on);
678: } else
679: mark_traced(NULL, on);
1.1 deraadt 680: }
681:
682: /*
683: * doifelse - select one of two alternatives - loop.
684: */
1.20 espie 685: static void
1.44 espie 686: doifelse(const char *argv[], int argc)
1.1 deraadt 687: {
688: cycle {
689: if (STREQ(argv[2], argv[3]))
690: pbstr(argv[4]);
691: else if (argc == 6)
692: pbstr(argv[5]);
693: else if (argc > 6) {
694: argv += 3;
695: argc -= 3;
696: continue;
697: }
698: break;
699: }
700: }
701:
702: /*
703: * doinclude - include a given file.
704: */
1.20 espie 705: static int
1.44 espie 706: doincl(const char *ifile)
1.1 deraadt 707: {
708: if (ilevel + 1 == MAXINP)
1.60 espie 709: m4errx(1, "too many include files.");
1.24 espie 710: if (fopen_trypath(infile+ilevel+1, ifile) != NULL) {
1.1 deraadt 711: ilevel++;
712: bbase[ilevel] = bufbase = bp;
713: return (1);
1.8 deraadt 714: } else
1.1 deraadt 715: return (0);
716: }
717:
718: #ifdef EXTENDED
719: /*
720: * dopaste - include a given file without any
721: * macro processing.
722: */
1.20 espie 723: static int
1.44 espie 724: dopaste(const char *pfile)
1.1 deraadt 725: {
726: FILE *pf;
1.17 espie 727: int c;
1.1 deraadt 728:
729: if ((pf = fopen(pfile, "r")) != NULL) {
1.45 espie 730: if (synch_lines)
731: fprintf(active, "#line 1 \"%s\"\n", pfile);
1.1 deraadt 732: while ((c = getc(pf)) != EOF)
733: putc(c, active);
734: (void) fclose(pf);
1.45 espie 735: emit_synchline();
1.1 deraadt 736: return (1);
1.8 deraadt 737: } else
1.1 deraadt 738: return (0);
739: }
740: #endif
741:
1.58 espie 742: /*
743: * dochq - change quote characters
744: */
1.39 espie 745: static void
1.58 espie 746: dochq(const char *argv[], int ac)
1.39 espie 747: {
748: if (ac == 2) {
1.58 espie 749: lquote[0] = LQUOTE; lquote[1] = EOS;
750: rquote[0] = RQUOTE; rquote[1] = EOS;
1.39 espie 751: } else {
752: strlcpy(lquote, argv[2], sizeof(lquote));
1.58 espie 753: if (ac > 3) {
1.39 espie 754: strlcpy(rquote, argv[3], sizeof(rquote));
1.58 espie 755: } else {
756: rquote[0] = ECOMMT; rquote[1] = EOS;
757: }
1.39 espie 758: }
759: }
760:
1.1 deraadt 761: /*
1.58 espie 762: * dochc - change comment characters
1.1 deraadt 763: */
1.20 espie 764: static void
1.58 espie 765: dochc(const char *argv[], int argc)
1.1 deraadt 766: {
1.58 espie 767: /* XXX Note that there is no difference between no argument and a single
768: * empty argument.
769: */
770: if (argc == 2) {
1.39 espie 771: scommt[0] = EOS;
772: ecommt[0] = EOS;
773: } else {
1.58 espie 774: strlcpy(scommt, argv[2], sizeof(scommt));
775: if (argc == 3) {
776: ecommt[0] = ECOMMT; ecommt[1] = EOS;
777: } else {
1.39 espie 778: strlcpy(ecommt, argv[3], sizeof(ecommt));
1.1 deraadt 779: }
780: }
1.55 espie 781: }
782:
783: /*
784: * dom4wrap - expand text at EOF
785: */
786: static void
787: dom4wrap(const char *text)
788: {
789: if (wrapindex >= maxwraps) {
790: if (maxwraps == 0)
791: maxwraps = 16;
792: else
793: maxwraps *= 2;
1.72 espie 794: m4wraps = xreallocarray(m4wraps, maxwraps, sizeof(*m4wraps),
1.55 espie 795: "too many m4wraps");
796: }
797: m4wraps[wrapindex++] = xstrdup(text);
1.1 deraadt 798: }
799:
800: /*
801: * dodivert - divert the output to a temporary file
802: */
1.20 espie 803: static void
1.44 espie 804: dodiv(int n)
1.1 deraadt 805: {
1.6 millert 806: int fd;
807:
1.8 deraadt 808: oindex = n;
1.28 espie 809: if (n >= maxout) {
810: if (mimic_gnu)
811: resizedivs(n + 10);
812: else
813: n = 0; /* bitbucket */
1.68 marco 814: }
1.28 espie 815:
816: if (n < 0)
1.1 deraadt 817: n = 0; /* bitbucket */
818: if (outfile[n] == NULL) {
1.13 espie 819: char fname[] = _PATH_DIVNAME;
820:
1.73 espie 821: if ((fd = mkstemp(fname)) < 0 ||
822: unlink(fname) == -1 ||
823: (outfile[n] = fdopen(fd, "w+")) == NULL)
824: err(1, "%s: cannot divert", fname);
1.1 deraadt 825: }
826: active = outfile[n];
827: }
828:
829: /*
830: * doundivert - undivert a specified output, or all
831: * other outputs, in numerical order.
832: */
1.20 espie 833: static void
1.44 espie 834: doundiv(const char *argv[], int argc)
1.1 deraadt 835: {
1.17 espie 836: int ind;
837: int n;
1.1 deraadt 838:
839: if (argc > 2) {
840: for (ind = 2; ind < argc; ind++) {
1.56 espie 841: const char *errstr;
842: n = strtonum(argv[ind], 1, INT_MAX, &errstr);
843: if (errstr) {
844: if (errno == EINVAL && mimic_gnu)
845: getdivfile(argv[ind]);
846: } else {
847: if (n < maxout && outfile[n] != NULL)
848: getdiv(n);
849: }
1.1 deraadt 850: }
851: }
852: else
1.28 espie 853: for (n = 1; n < maxout; n++)
1.1 deraadt 854: if (outfile[n] != NULL)
855: getdiv(n);
856: }
857:
858: /*
859: * dosub - select substring
860: */
1.20 espie 861: static void
1.44 espie 862: dosub(const char *argv[], int argc)
1.1 deraadt 863: {
1.20 espie 864: const char *ap, *fc, *k;
1.17 espie 865: int nc;
1.1 deraadt 866:
1.29 espie 867: ap = argv[2]; /* target string */
1.1 deraadt 868: #ifdef EXPR
1.29 espie 869: fc = ap + expr(argv[3]); /* first char */
1.1 deraadt 870: #else
1.29 espie 871: fc = ap + atoi(argv[3]); /* first char */
1.1 deraadt 872: #endif
1.29 espie 873: nc = strlen(fc);
874: if (argc >= 5)
1.1 deraadt 875: #ifdef EXPR
1.29 espie 876: nc = min(nc, expr(argv[4]));
1.1 deraadt 877: #else
1.29 espie 878: nc = min(nc, atoi(argv[4]));
1.1 deraadt 879: #endif
880: if (fc >= ap && fc < ap + strlen(ap))
1.29 espie 881: for (k = fc + nc - 1; k >= fc; k--)
1.58 espie 882: pushback(*k);
1.1 deraadt 883: }
884:
885: /*
886: * map:
887: * map every character of s1 that is specified in from
888: * into s3 and replace in s. (source s1 remains untouched)
889: *
1.69 espie 890: * This is derived from the a standard implementation of map(s,from,to)
891: * function of ICON language. Within mapvec, we replace every character
892: * of "from" with the corresponding character in "to".
893: * If "to" is shorter than "from", than the corresponding entries are null,
894: * which means that those characters dissapear altogether.
1.1 deraadt 895: */
1.20 espie 896: static void
1.44 espie 897: map(char *dest, const char *src, const char *from, const char *to)
1.1 deraadt 898: {
1.20 espie 899: const char *tmp;
1.19 espie 900: unsigned char sch, dch;
1.26 espie 901: static char frombis[257];
902: static char tobis[257];
1.67 espie 903: int i;
904: char seen[256];
1.19 espie 905: static unsigned char mapvec[256] = {
906: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
907: 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
908: 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
909: 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
910: 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86,
911: 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102,
912: 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
913: 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128,
914: 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
915: 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154,
916: 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167,
917: 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180,
918: 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193,
919: 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206,
920: 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
921: 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
922: 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245,
923: 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
1.1 deraadt 924: };
925:
926: if (*src) {
1.26 espie 927: if (mimic_gnu) {
928: /*
929: * expand character ranges on the fly
930: */
931: from = handledash(frombis, frombis + 256, from);
932: to = handledash(tobis, tobis + 256, to);
933: }
1.1 deraadt 934: tmp = from;
935: /*
936: * create a mapping between "from" and
937: * "to"
938: */
1.67 espie 939: for (i = 0; i < 256; i++)
940: seen[i] = 0;
941: while (*from) {
942: if (!seen[(unsigned char)(*from)]) {
943: mapvec[(unsigned char)(*from)] = (unsigned char)(*to);
944: seen[(unsigned char)(*from)] = 1;
945: }
946: from++;
947: if (*to)
948: to++;
949: }
1.1 deraadt 950:
951: while (*src) {
1.19 espie 952: sch = (unsigned char)(*src++);
1.1 deraadt 953: dch = mapvec[sch];
1.19 espie 954: if ((*dest = (char)dch))
1.1 deraadt 955: dest++;
956: }
957: /*
958: * restore all the changed characters
959: */
960: while (*tmp) {
1.19 espie 961: mapvec[(unsigned char)(*tmp)] = (unsigned char)(*tmp);
1.1 deraadt 962: tmp++;
963: }
964: }
1.19 espie 965: *dest = '\0';
1.1 deraadt 966: }
1.26 espie 967:
968:
969: /*
970: * handledash:
971: * use buffer to copy the src string, expanding character ranges
972: * on the way.
973: */
974: static const char *
1.44 espie 975: handledash(char *buffer, char *end, const char *src)
1.26 espie 976: {
977: char *p;
1.68 marco 978:
1.26 espie 979: p = buffer;
980: while(*src) {
981: if (src[1] == '-' && src[2]) {
982: unsigned char i;
1.56 espie 983: if ((unsigned char)src[0] <= (unsigned char)src[2]) {
984: for (i = (unsigned char)src[0];
985: i <= (unsigned char)src[2]; i++) {
986: *p++ = i;
987: if (p == end) {
988: *p = '\0';
989: return buffer;
990: }
991: }
992: } else {
993: for (i = (unsigned char)src[0];
994: i >= (unsigned char)src[2]; i--) {
995: *p++ = i;
996: if (p == end) {
997: *p = '\0';
998: return buffer;
999: }
1.26 espie 1000: }
1001: }
1002: src += 3;
1003: } else
1004: *p++ = *src++;
1005: if (p == end)
1006: break;
1007: }
1008: *p = '\0';
1009: return buffer;
1010: }