Annotation of src/usr.bin/m4/eval.c, Revision 1.61
1.61 ! espie 1: /* $OpenBSD: eval.c,v 1.60 2006/03/20 10:55:19 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>
43: #include <errno.h>
1.56 espie 44: #include <limits.h>
1.1 deraadt 45: #include <unistd.h>
46: #include <stdio.h>
47: #include <stdlib.h>
1.13 espie 48: #include <stddef.h>
1.1 deraadt 49: #include <string.h>
1.6 millert 50: #include <fcntl.h>
1.1 deraadt 51: #include "mdef.h"
52: #include "stdd.h"
53: #include "extern.h"
54: #include "pathnames.h"
55:
1.43 millert 56: static void dodefn(const char *);
57: static void dopushdef(const char *, const char *);
58: static void dodump(const char *[], int);
59: static void dotrace(const char *[], int, int);
60: static void doifelse(const char *[], int);
61: static int doincl(const char *);
62: static int dopaste(const char *);
63: static void dochq(const char *[], int);
64: static void dochc(const char *[], int);
1.55 espie 65: static void dom4wrap(const char *);
1.43 millert 66: static void dodiv(int);
67: static void doundiv(const char *[], int);
68: static void dosub(const char *[], int);
69: static void map(char *, const char *, const char *, const char *);
70: static const char *handledash(char *, char *, const char *);
71: static void expand_builtin(const char *[], int, int);
72: static void expand_macro(const char *[], int);
1.49 espie 73: static void dump_one_def(const char *, struct macro_definition *);
1.30 espie 74:
1.34 espie 75: unsigned long expansion_id;
1.30 espie 76:
1.1 deraadt 77: /*
1.30 espie 78: * eval - eval all macros and builtins calls
1.39 espie 79: * argc - number of elements in argv.
80: * argv - element vector :
81: * argv[0] = definition of a user
1.49 espie 82: * macro or NULL if built-in.
1.39 espie 83: * argv[1] = name of the macro or
84: * built-in.
85: * argv[2] = parameters to user-defined
86: * . macro or built-in.
87: * .
88: *
89: * A call in the form of macro-or-builtin() will result in:
90: * argv[0] = nullstr
91: * argv[1] = macro-or-builtin
92: * argv[2] = nullstr
93: *
94: * argc is 3 for macro-or-builtin() and 2 for macro-or-builtin
1.30 espie 95: */
96: void
1.50 espie 97: eval(const char *argv[], int argc, int td, int is_traced)
1.30 espie 98: {
1.59 espie 99: size_t mark = SIZE_MAX;
1.35 espie 100:
1.34 espie 101: expansion_id++;
1.30 espie 102: if (td & RECDEF)
1.60 espie 103: m4errx(1, "expanding recursive definition for %s.", argv[1]);
1.50 espie 104: if (is_traced)
1.35 espie 105: mark = trace(argv, argc, infile+ilevel);
1.30 espie 106: if (td == MACRTYPE)
107: expand_macro(argv, argc);
108: else
109: expand_builtin(argv, argc, td);
1.59 espie 110: if (mark != SIZE_MAX)
1.35 espie 111: finish_trace(mark);
1.30 espie 112: }
113:
114: /*
115: * expand_builtin - evaluate built-in macros.
1.1 deraadt 116: */
117: void
1.44 espie 118: expand_builtin(const char *argv[], int argc, int td)
1.1 deraadt 119: {
1.17 espie 120: int c, n;
1.39 espie 121: int ac;
1.1 deraadt 122: static int sysval = 0;
123:
124: #ifdef DEBUG
125: printf("argc = %d\n", argc);
126: for (n = 0; n < argc; n++)
127: printf("argv[%d] = %s\n", n, argv[n]);
1.42 espie 128: fflush(stdout);
1.1 deraadt 129: #endif
1.22 espie 130:
1.1 deraadt 131: /*
132: * if argc == 3 and argv[2] is null, then we
133: * have macro-or-builtin() type call. We adjust
134: * argc to avoid further checking..
135: */
1.58 espie 136: /* we keep the initial value for those built-ins that differentiate
137: * between builtin() and builtin.
138: */
1.39 espie 139: ac = argc;
140:
1.1 deraadt 141: if (argc == 3 && !*(argv[2]))
142: argc--;
143:
1.22 espie 144: switch (td & TYPEMASK) {
1.1 deraadt 145:
146: case DEFITYPE:
147: if (argc > 2)
148: dodefine(argv[2], (argc > 3) ? argv[3] : null);
149: break;
150:
151: case PUSDTYPE:
152: if (argc > 2)
153: dopushdef(argv[2], (argc > 3) ? argv[3] : null);
154: break;
155:
156: case DUMPTYPE:
157: dodump(argv, argc);
158: break;
159:
1.37 espie 160: case TRACEONTYPE:
161: dotrace(argv, argc, 1);
162: break;
163:
164: case TRACEOFFTYPE:
165: dotrace(argv, argc, 0);
166: break;
167:
1.1 deraadt 168: case EXPRTYPE:
169: /*
170: * doexpr - evaluate arithmetic
171: * expression
172: */
1.56 espie 173: {
174: int base = 10;
175: int maxdigits = 0;
176: const char *errstr;
177:
178: if (argc > 3) {
179: base = strtonum(argv[3], 2, 36, &errstr);
180: if (errstr) {
1.60 espie 181: m4errx(1, "expr: base %s invalid.", argv[3]);
1.56 espie 182: }
183: }
184: if (argc > 4) {
185: maxdigits = strtonum(argv[4], 0, INT_MAX, &errstr);
186: if (errstr) {
1.60 espie 187: m4errx(1, "expr: maxdigits %s invalid.", argv[4]);
1.56 espie 188: }
189: }
1.1 deraadt 190: if (argc > 2)
1.56 espie 191: pbnumbase(expr(argv[2]), base, maxdigits);
1.1 deraadt 192: break;
1.56 espie 193: }
1.1 deraadt 194:
195: case IFELTYPE:
196: if (argc > 4)
197: doifelse(argv, argc);
198: break;
199:
200: case IFDFTYPE:
201: /*
202: * doifdef - select one of two
203: * alternatives based on the existence of
204: * another definition
205: */
206: if (argc > 3) {
1.49 espie 207: if (lookup_macro_definition(argv[2]) != NULL)
1.1 deraadt 208: pbstr(argv[3]);
209: else if (argc > 4)
210: pbstr(argv[4]);
211: }
212: break;
213:
214: case LENGTYPE:
215: /*
216: * dolen - find the length of the
217: * argument
218: */
1.18 espie 219: pbnum((argc > 2) ? strlen(argv[2]) : 0);
1.1 deraadt 220: break;
221:
222: case INCRTYPE:
223: /*
224: * doincr - increment the value of the
225: * argument
226: */
227: if (argc > 2)
228: pbnum(atoi(argv[2]) + 1);
229: break;
230:
231: case DECRTYPE:
232: /*
233: * dodecr - decrement the value of the
234: * argument
235: */
236: if (argc > 2)
237: pbnum(atoi(argv[2]) - 1);
238: break;
239:
240: case SYSCTYPE:
241: /*
242: * dosys - execute system command
243: */
1.54 robert 244: if (argc > 2) {
245: fflush(stdout);
1.1 deraadt 246: sysval = system(argv[2]);
1.54 robert 247: }
1.1 deraadt 248: break;
249:
250: case SYSVTYPE:
251: /*
252: * dosysval - return value of the last
253: * system call.
254: *
255: */
256: pbnum(sysval);
257: break;
258:
1.27 espie 259: case ESYSCMDTYPE:
260: if (argc > 2)
261: doesyscmd(argv[2]);
262: break;
1.1 deraadt 263: case INCLTYPE:
264: if (argc > 2)
265: if (!doincl(argv[2]))
1.24 espie 266: err(1, "%s at line %lu: include(%s)",
267: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.1 deraadt 268: break;
269:
270: case SINCTYPE:
271: if (argc > 2)
272: (void) doincl(argv[2]);
273: break;
274: #ifdef EXTENDED
275: case PASTTYPE:
276: if (argc > 2)
277: if (!dopaste(argv[2]))
1.24 espie 278: err(1, "%s at line %lu: paste(%s)",
279: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.1 deraadt 280: break;
281:
282: case SPASTYPE:
283: if (argc > 2)
284: (void) dopaste(argv[2]);
1.61 ! espie 285: break;
! 286: case FORMATTYPE:
! 287: if (mimic_gnu)
! 288: doformat(argv, argc);
! 289: else
! 290: m4errx(1, "format builtin is only available in gnu-m4 mode.");
1.1 deraadt 291: break;
292: #endif
293: case CHNQTYPE:
1.58 espie 294: dochq(argv, ac);
1.1 deraadt 295: break;
296:
297: case CHNCTYPE:
1.58 espie 298: dochc(argv, argc);
1.1 deraadt 299: break;
300:
301: case SUBSTYPE:
302: /*
303: * dosub - select substring
304: *
305: */
306: if (argc > 3)
307: dosub(argv, argc);
308: break;
309:
310: case SHIFTYPE:
311: /*
312: * doshift - push back all arguments
313: * except the first one (i.e. skip
314: * argv[2])
315: */
316: if (argc > 3) {
317: for (n = argc - 1; n > 3; n--) {
1.10 deraadt 318: pbstr(rquote);
1.1 deraadt 319: pbstr(argv[n]);
1.10 deraadt 320: pbstr(lquote);
1.58 espie 321: pushback(COMMA);
1.1 deraadt 322: }
1.10 deraadt 323: pbstr(rquote);
1.1 deraadt 324: pbstr(argv[3]);
1.10 deraadt 325: pbstr(lquote);
1.1 deraadt 326: }
327: break;
328:
329: case DIVRTYPE:
330: if (argc > 2 && (n = atoi(argv[2])) != 0)
331: dodiv(n);
332: else {
333: active = stdout;
334: oindex = 0;
335: }
336: break;
337:
338: case UNDVTYPE:
339: doundiv(argv, argc);
340: break;
341:
342: case DIVNTYPE:
343: /*
344: * dodivnum - return the number of
345: * current output diversion
346: */
347: pbnum(oindex);
348: break;
349:
350: case UNDFTYPE:
351: /*
352: * doundefine - undefine a previously
353: * defined macro(s) or m4 keyword(s).
354: */
355: if (argc > 2)
356: for (n = 2; n < argc; n++)
1.49 espie 357: macro_undefine(argv[n]);
1.1 deraadt 358: break;
359:
360: case POPDTYPE:
361: /*
362: * dopopdef - remove the topmost
363: * definitions of macro(s) or m4
364: * keyword(s).
365: */
366: if (argc > 2)
367: for (n = 2; n < argc; n++)
1.49 espie 368: macro_popdef(argv[n]);
1.1 deraadt 369: break;
370:
371: case MKTMTYPE:
372: /*
373: * dotemp - create a temporary file
374: */
1.16 espie 375: if (argc > 2) {
376: int fd;
1.20 espie 377: char *temp;
378:
379: temp = xstrdup(argv[2]);
1.16 espie 380:
1.20 espie 381: fd = mkstemp(temp);
1.16 espie 382: if (fd == -1)
1.24 espie 383: err(1,
384: "%s at line %lu: couldn't make temp file %s",
385: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.16 espie 386: close(fd);
1.20 espie 387: pbstr(temp);
388: free(temp);
1.16 espie 389: }
1.1 deraadt 390: break;
391:
392: case TRNLTYPE:
393: /*
394: * dotranslit - replace all characters in
395: * the source string that appears in the
396: * "from" string with the corresponding
397: * characters in the "to" string.
398: */
399: if (argc > 3) {
1.42 espie 400: char *temp;
401:
1.51 espie 402: temp = xalloc(strlen(argv[2])+1, NULL);
1.1 deraadt 403: if (argc > 4)
404: map(temp, argv[2], argv[3], argv[4]);
405: else
406: map(temp, argv[2], argv[3], null);
407: pbstr(temp);
1.42 espie 408: free(temp);
1.8 deraadt 409: } else if (argc > 2)
1.1 deraadt 410: pbstr(argv[2]);
411: break;
412:
413: case INDXTYPE:
414: /*
415: * doindex - find the index of the second
416: * argument string in the first argument
417: * string. -1 if not present.
418: */
419: pbnum((argc > 3) ? indx(argv[2], argv[3]) : -1);
420: break;
421:
422: case ERRPTYPE:
423: /*
424: * doerrp - print the arguments to stderr
425: * file
426: */
427: if (argc > 2) {
428: for (n = 2; n < argc; n++)
429: fprintf(stderr, "%s ", argv[n]);
430: fprintf(stderr, "\n");
431: }
432: break;
433:
434: case DNLNTYPE:
435: /*
436: * dodnl - eat-up-to and including
437: * newline
438: */
439: while ((c = gpbc()) != '\n' && c != EOF)
440: ;
441: break;
442:
443: case M4WRTYPE:
444: /*
445: * dom4wrap - set up for
446: * wrap-up/wind-down activity
447: */
1.55 espie 448: if (argc > 2)
449: dom4wrap(argv[2]);
1.1 deraadt 450: break;
451:
452: case EXITTYPE:
453: /*
454: * doexit - immediate exit from m4.
455: */
456: killdiv();
457: exit((argc > 2) ? atoi(argv[2]) : 0);
458: break;
459:
460: case DEFNTYPE:
461: if (argc > 2)
462: for (n = 2; n < argc; n++)
463: dodefn(argv[n]);
464: break;
465:
1.25 espie 466: case INDIRTYPE: /* Indirect call */
467: if (argc > 2)
468: doindir(argv, argc);
469: break;
470:
471: case BUILTINTYPE: /* Builtins only */
472: if (argc > 2)
473: dobuiltin(argv, argc);
474: break;
475:
476: case PATSTYPE:
477: if (argc > 2)
478: dopatsubst(argv, argc);
479: break;
480: case REGEXPTYPE:
481: if (argc > 2)
482: doregexp(argv, argc);
483: break;
484: case LINETYPE:
485: doprintlineno(infile+ilevel);
486: break;
487: case FILENAMETYPE:
488: doprintfilename(infile+ilevel);
489: break;
1.23 espie 490: case SELFTYPE:
491: pbstr(rquote);
492: pbstr(argv[1]);
493: pbstr(lquote);
494: break;
1.1 deraadt 495: default:
1.60 espie 496: m4errx(1, "eval: major botch.");
1.1 deraadt 497: break;
498: }
499: }
500:
501: /*
1.30 espie 502: * expand_macro - user-defined macro expansion
1.1 deraadt 503: */
504: void
1.44 espie 505: expand_macro(const char *argv[], int argc)
1.1 deraadt 506: {
1.20 espie 507: const char *t;
508: const char *p;
1.17 espie 509: int n;
510: int argno;
1.1 deraadt 511:
512: t = argv[0]; /* defn string as a whole */
513: p = t;
514: while (*p)
515: p++;
516: p--; /* last character of defn */
517: while (p > t) {
518: if (*(p - 1) != ARGFLAG)
1.58 espie 519: PUSHBACK(*p);
1.1 deraadt 520: else {
521: switch (*p) {
522:
523: case '#':
524: pbnum(argc - 2);
525: break;
526: case '0':
527: case '1':
528: case '2':
529: case '3':
530: case '4':
531: case '5':
532: case '6':
533: case '7':
534: case '8':
535: case '9':
536: if ((argno = *p - '0') < argc - 1)
537: pbstr(argv[argno + 1]);
538: break;
539: case '*':
1.41 espie 540: if (argc > 2) {
541: for (n = argc - 1; n > 2; n--) {
542: pbstr(argv[n]);
1.58 espie 543: pushback(COMMA);
1.41 espie 544: }
545: pbstr(argv[2]);
546: }
1.1 deraadt 547: break;
1.7 millert 548: case '@':
1.41 espie 549: if (argc > 2) {
550: for (n = argc - 1; n > 2; n--) {
551: pbstr(rquote);
552: pbstr(argv[n]);
553: pbstr(lquote);
1.58 espie 554: pushback(COMMA);
1.41 espie 555: }
556: pbstr(rquote);
557: pbstr(argv[2]);
558: pbstr(lquote);
559: }
1.7 millert 560: break;
1.1 deraadt 561: default:
1.58 espie 562: PUSHBACK(*p);
563: PUSHBACK('$');
1.1 deraadt 564: break;
565: }
566: p--;
567: }
568: p--;
569: }
570: if (p == t) /* do last character */
1.58 espie 571: PUSHBACK(*p);
1.1 deraadt 572: }
573:
1.48 espie 574:
1.1 deraadt 575: /*
1.48 espie 576: * dodefine - install definition in the table
577: */
578: void
579: dodefine(const char *name, const char *defn)
580: {
581: if (!*name)
1.60 espie 582: m4errx(1, "null definition.");
1.49 espie 583: macro_define(name, defn);
1.1 deraadt 584: }
585:
586: /*
587: * dodefn - push back a quoted definition of
588: * the given name.
589: */
1.20 espie 590: static void
1.44 espie 591: dodefn(const char *name)
1.1 deraadt 592: {
1.49 espie 593: struct macro_definition *p;
1.1 deraadt 594:
1.49 espie 595: if ((p = lookup_macro_definition(name)) != NULL) {
1.48 espie 596: if ((p->type & TYPEMASK) == MACRTYPE) {
1.40 espie 597: pbstr(rquote);
598: pbstr(p->defn);
599: pbstr(lquote);
1.48 espie 600: } else {
601: pbstr(p->defn);
1.31 espie 602: pbstr(BUILTIN_MARKER);
603: }
1.1 deraadt 604: }
605: }
606:
607: /*
608: * dopushdef - install a definition in the hash table
609: * without removing a previous definition. Since
610: * each new entry is entered in *front* of the
611: * hash bucket, it hides a previous definition from
612: * lookup.
613: */
1.20 espie 614: static void
1.44 espie 615: dopushdef(const char *name, const char *defn)
1.1 deraadt 616: {
617: if (!*name)
1.60 espie 618: m4errx(1, "null definition.");
1.49 espie 619: macro_pushdef(name, defn);
1.1 deraadt 620: }
621:
622: /*
1.32 espie 623: * dump_one_def - dump the specified definition.
624: */
625: static void
1.49 espie 626: dump_one_def(const char *name, struct macro_definition *p)
1.32 espie 627: {
1.53 espie 628: if (!traceout)
629: traceout = stderr;
1.33 espie 630: if (mimic_gnu) {
631: if ((p->type & TYPEMASK) == MACRTYPE)
1.49 espie 632: fprintf(traceout, "%s:\t%s\n", name, p->defn);
1.33 espie 633: else {
1.49 espie 634: fprintf(traceout, "%s:\t<%s>\n", name, p->defn);
1.33 espie 635: }
636: } else
1.49 espie 637: fprintf(traceout, "`%s'\t`%s'\n", name, p->defn);
1.32 espie 638: }
639:
640: /*
1.1 deraadt 641: * dodumpdef - dump the specified definitions in the hash
642: * table to stderr. If nothing is specified, the entire
643: * hash table is dumped.
644: */
1.20 espie 645: static void
1.44 espie 646: dodump(const char *argv[], int argc)
1.1 deraadt 647: {
1.17 espie 648: int n;
1.49 espie 649: struct macro_definition *p;
1.1 deraadt 650:
651: if (argc > 2) {
652: for (n = 2; n < argc; n++)
1.49 espie 653: if ((p = lookup_macro_definition(argv[n])) != NULL)
654: dump_one_def(argv[n], p);
655: } else
656: macro_for_all(dump_one_def);
1.37 espie 657: }
658:
659: /*
660: * dotrace - mark some macros as traced/untraced depending upon on.
661: */
662: static void
1.44 espie 663: dotrace(const char *argv[], int argc, int on)
1.37 espie 664: {
665: int n;
666:
667: if (argc > 2) {
668: for (n = 2; n < argc; n++)
669: mark_traced(argv[n], on);
670: } else
671: mark_traced(NULL, on);
1.1 deraadt 672: }
673:
674: /*
675: * doifelse - select one of two alternatives - loop.
676: */
1.20 espie 677: static void
1.44 espie 678: doifelse(const char *argv[], int argc)
1.1 deraadt 679: {
680: cycle {
681: if (STREQ(argv[2], argv[3]))
682: pbstr(argv[4]);
683: else if (argc == 6)
684: pbstr(argv[5]);
685: else if (argc > 6) {
686: argv += 3;
687: argc -= 3;
688: continue;
689: }
690: break;
691: }
692: }
693:
694: /*
695: * doinclude - include a given file.
696: */
1.20 espie 697: static int
1.44 espie 698: doincl(const char *ifile)
1.1 deraadt 699: {
700: if (ilevel + 1 == MAXINP)
1.60 espie 701: m4errx(1, "too many include files.");
1.24 espie 702: if (fopen_trypath(infile+ilevel+1, ifile) != NULL) {
1.1 deraadt 703: ilevel++;
704: bbase[ilevel] = bufbase = bp;
705: return (1);
1.8 deraadt 706: } else
1.1 deraadt 707: return (0);
708: }
709:
710: #ifdef EXTENDED
711: /*
712: * dopaste - include a given file without any
713: * macro processing.
714: */
1.20 espie 715: static int
1.44 espie 716: dopaste(const char *pfile)
1.1 deraadt 717: {
718: FILE *pf;
1.17 espie 719: int c;
1.1 deraadt 720:
721: if ((pf = fopen(pfile, "r")) != NULL) {
1.45 espie 722: if (synch_lines)
723: fprintf(active, "#line 1 \"%s\"\n", pfile);
1.1 deraadt 724: while ((c = getc(pf)) != EOF)
725: putc(c, active);
726: (void) fclose(pf);
1.45 espie 727: emit_synchline();
1.1 deraadt 728: return (1);
1.8 deraadt 729: } else
1.1 deraadt 730: return (0);
731: }
732: #endif
733:
1.58 espie 734: /*
735: * dochq - change quote characters
736: */
1.39 espie 737: static void
1.58 espie 738: dochq(const char *argv[], int ac)
1.39 espie 739: {
740: if (ac == 2) {
1.58 espie 741: lquote[0] = LQUOTE; lquote[1] = EOS;
742: rquote[0] = RQUOTE; rquote[1] = EOS;
1.39 espie 743: } else {
744: strlcpy(lquote, argv[2], sizeof(lquote));
1.58 espie 745: if (ac > 3) {
1.39 espie 746: strlcpy(rquote, argv[3], sizeof(rquote));
1.58 espie 747: } else {
748: rquote[0] = ECOMMT; rquote[1] = EOS;
749: }
1.39 espie 750: }
751: }
752:
1.1 deraadt 753: /*
1.58 espie 754: * dochc - change comment characters
1.1 deraadt 755: */
1.20 espie 756: static void
1.58 espie 757: dochc(const char *argv[], int argc)
1.1 deraadt 758: {
1.58 espie 759: /* XXX Note that there is no difference between no argument and a single
760: * empty argument.
761: */
762: if (argc == 2) {
1.39 espie 763: scommt[0] = EOS;
764: ecommt[0] = EOS;
765: } else {
1.58 espie 766: strlcpy(scommt, argv[2], sizeof(scommt));
767: if (argc == 3) {
768: ecommt[0] = ECOMMT; ecommt[1] = EOS;
769: } else {
1.39 espie 770: strlcpy(ecommt, argv[3], sizeof(ecommt));
1.1 deraadt 771: }
772: }
1.55 espie 773: }
774:
775: /*
776: * dom4wrap - expand text at EOF
777: */
778: static void
779: dom4wrap(const char *text)
780: {
781: if (wrapindex >= maxwraps) {
782: if (maxwraps == 0)
783: maxwraps = 16;
784: else
785: maxwraps *= 2;
786: m4wraps = xrealloc(m4wraps, maxwraps * sizeof(*m4wraps),
787: "too many m4wraps");
788: }
789: m4wraps[wrapindex++] = xstrdup(text);
1.1 deraadt 790: }
791:
792: /*
793: * dodivert - divert the output to a temporary file
794: */
1.20 espie 795: static void
1.44 espie 796: dodiv(int n)
1.1 deraadt 797: {
1.6 millert 798: int fd;
799:
1.8 deraadt 800: oindex = n;
1.28 espie 801: if (n >= maxout) {
802: if (mimic_gnu)
803: resizedivs(n + 10);
804: else
805: n = 0; /* bitbucket */
806: }
807:
808: if (n < 0)
1.1 deraadt 809: n = 0; /* bitbucket */
810: if (outfile[n] == NULL) {
1.13 espie 811: char fname[] = _PATH_DIVNAME;
812:
813: if ((fd = mkstemp(fname)) < 0 ||
814: (outfile[n] = fdopen(fd, "w+")) == NULL)
815: err(1, "%s: cannot divert", fname);
816: if (unlink(fname) == -1)
817: err(1, "%s: cannot unlink", fname);
1.1 deraadt 818: }
819: active = outfile[n];
820: }
821:
822: /*
823: * doundivert - undivert a specified output, or all
824: * other outputs, in numerical order.
825: */
1.20 espie 826: static void
1.44 espie 827: doundiv(const char *argv[], int argc)
1.1 deraadt 828: {
1.17 espie 829: int ind;
830: int n;
1.1 deraadt 831:
832: if (argc > 2) {
833: for (ind = 2; ind < argc; ind++) {
1.56 espie 834: const char *errstr;
835: n = strtonum(argv[ind], 1, INT_MAX, &errstr);
836: if (errstr) {
837: if (errno == EINVAL && mimic_gnu)
838: getdivfile(argv[ind]);
839: } else {
840: if (n < maxout && outfile[n] != NULL)
841: getdiv(n);
842: }
1.1 deraadt 843: }
844: }
845: else
1.28 espie 846: for (n = 1; n < maxout; n++)
1.1 deraadt 847: if (outfile[n] != NULL)
848: getdiv(n);
849: }
850:
851: /*
852: * dosub - select substring
853: */
1.20 espie 854: static void
1.44 espie 855: dosub(const char *argv[], int argc)
1.1 deraadt 856: {
1.20 espie 857: const char *ap, *fc, *k;
1.17 espie 858: int nc;
1.1 deraadt 859:
1.29 espie 860: ap = argv[2]; /* target string */
1.1 deraadt 861: #ifdef EXPR
1.29 espie 862: fc = ap + expr(argv[3]); /* first char */
1.1 deraadt 863: #else
1.29 espie 864: fc = ap + atoi(argv[3]); /* first char */
1.1 deraadt 865: #endif
1.29 espie 866: nc = strlen(fc);
867: if (argc >= 5)
1.1 deraadt 868: #ifdef EXPR
1.29 espie 869: nc = min(nc, expr(argv[4]));
1.1 deraadt 870: #else
1.29 espie 871: nc = min(nc, atoi(argv[4]));
1.1 deraadt 872: #endif
873: if (fc >= ap && fc < ap + strlen(ap))
1.29 espie 874: for (k = fc + nc - 1; k >= fc; k--)
1.58 espie 875: pushback(*k);
1.1 deraadt 876: }
877:
878: /*
879: * map:
880: * map every character of s1 that is specified in from
881: * into s3 and replace in s. (source s1 remains untouched)
882: *
883: * This is a standard implementation of map(s,from,to) function of ICON
884: * language. Within mapvec, we replace every character of "from" with
885: * the corresponding character in "to". If "to" is shorter than "from",
886: * than the corresponding entries are null, which means that those
887: * characters dissapear altogether. Furthermore, imagine
888: * map(dest, "sourcestring", "srtin", "rn..*") type call. In this case,
889: * `s' maps to `r', `r' maps to `n' and `n' maps to `*'. Thus, `s'
890: * ultimately maps to `*'. In order to achieve this effect in an efficient
891: * manner (i.e. without multiple passes over the destination string), we
892: * loop over mapvec, starting with the initial source character. if the
893: * character value (dch) in this location is different than the source
894: * character (sch), sch becomes dch, once again to index into mapvec, until
895: * the character value stabilizes (i.e. sch = dch, in other words
896: * mapvec[n] == n). Even if the entry in the mapvec is null for an ordinary
897: * character, it will stabilize, since mapvec[0] == 0 at all times. At the
898: * end, we restore mapvec* back to normal where mapvec[n] == n for
899: * 0 <= n <= 127. This strategy, along with the restoration of mapvec, is
900: * about 5 times faster than any algorithm that makes multiple passes over
901: * destination string.
902: */
1.20 espie 903: static void
1.44 espie 904: map(char *dest, const char *src, const char *from, const char *to)
1.1 deraadt 905: {
1.20 espie 906: const char *tmp;
1.19 espie 907: unsigned char sch, dch;
1.26 espie 908: static char frombis[257];
909: static char tobis[257];
1.19 espie 910: static unsigned char mapvec[256] = {
911: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
912: 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
913: 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
914: 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
915: 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86,
916: 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102,
917: 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
918: 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128,
919: 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
920: 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154,
921: 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167,
922: 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180,
923: 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193,
924: 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206,
925: 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
926: 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
927: 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245,
928: 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
1.1 deraadt 929: };
930:
931: if (*src) {
1.26 espie 932: if (mimic_gnu) {
933: /*
934: * expand character ranges on the fly
935: */
936: from = handledash(frombis, frombis + 256, from);
937: to = handledash(tobis, tobis + 256, to);
938: }
1.1 deraadt 939: tmp = from;
940: /*
941: * create a mapping between "from" and
942: * "to"
943: */
944: while (*from)
1.19 espie 945: mapvec[(unsigned char)(*from++)] = (*to) ?
946: (unsigned char)(*to++) : 0;
1.1 deraadt 947:
948: while (*src) {
1.19 espie 949: sch = (unsigned char)(*src++);
1.1 deraadt 950: dch = mapvec[sch];
951: while (dch != sch) {
952: sch = dch;
953: dch = mapvec[sch];
954: }
1.19 espie 955: if ((*dest = (char)dch))
1.1 deraadt 956: dest++;
957: }
958: /*
959: * restore all the changed characters
960: */
961: while (*tmp) {
1.19 espie 962: mapvec[(unsigned char)(*tmp)] = (unsigned char)(*tmp);
1.1 deraadt 963: tmp++;
964: }
965: }
1.19 espie 966: *dest = '\0';
1.1 deraadt 967: }
1.26 espie 968:
969:
970: /*
971: * handledash:
972: * use buffer to copy the src string, expanding character ranges
973: * on the way.
974: */
975: static const char *
1.44 espie 976: handledash(char *buffer, char *end, const char *src)
1.26 espie 977: {
978: char *p;
979:
980: p = buffer;
981: while(*src) {
982: if (src[1] == '-' && src[2]) {
983: unsigned char i;
1.56 espie 984: if ((unsigned char)src[0] <= (unsigned char)src[2]) {
985: for (i = (unsigned char)src[0];
986: i <= (unsigned char)src[2]; i++) {
987: *p++ = i;
988: if (p == end) {
989: *p = '\0';
990: return buffer;
991: }
992: }
993: } else {
994: for (i = (unsigned char)src[0];
995: i >= (unsigned char)src[2]; i--) {
996: *p++ = i;
997: if (p == end) {
998: *p = '\0';
999: return buffer;
1000: }
1.26 espie 1001: }
1002: }
1003: src += 3;
1004: } else
1005: *p++ = *src++;
1006: if (p == end)
1007: break;
1008: }
1009: *p = '\0';
1010: return buffer;
1011: }
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