Annotation of src/usr.bin/m4/eval.c, Revision 1.54
1.54 ! robert 1: /* $OpenBSD: eval.c,v 1.53 2005/01/21 19:11:02 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: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)eval.c 8.2 (Berkeley) 4/27/95";
39: #else
1.54 ! robert 40: static char rcsid[] = "$OpenBSD: eval.c,v 1.53 2005/01/21 19:11:02 espie Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: /*
45: * eval.c
46: * Facility: m4 macro processor
47: * by: oz
48: */
49:
50: #include <sys/types.h>
51: #include <errno.h>
52: #include <unistd.h>
53: #include <stdio.h>
54: #include <stdlib.h>
1.13 espie 55: #include <stddef.h>
1.1 deraadt 56: #include <string.h>
1.6 millert 57: #include <fcntl.h>
1.12 espie 58: #include <err.h>
1.1 deraadt 59: #include "mdef.h"
60: #include "stdd.h"
61: #include "extern.h"
62: #include "pathnames.h"
63:
1.43 millert 64: static void dodefn(const char *);
65: static void dopushdef(const char *, const char *);
66: static void dodump(const char *[], int);
67: static void dotrace(const char *[], int, int);
68: static void doifelse(const char *[], int);
69: static int doincl(const char *);
70: static int dopaste(const char *);
71: static void gnu_dochq(const char *[], int);
72: static void dochq(const char *[], int);
73: static void gnu_dochc(const char *[], int);
74: static void dochc(const char *[], int);
75: static void dodiv(int);
76: static void doundiv(const char *[], int);
77: static void dosub(const char *[], int);
78: static void map(char *, const char *, const char *, const char *);
79: static const char *handledash(char *, char *, const char *);
80: static void expand_builtin(const char *[], int, int);
81: static void expand_macro(const char *[], int);
1.49 espie 82: static void dump_one_def(const char *, struct macro_definition *);
1.30 espie 83:
1.34 espie 84: unsigned long expansion_id;
1.30 espie 85:
1.1 deraadt 86: /*
1.30 espie 87: * eval - eval all macros and builtins calls
1.39 espie 88: * argc - number of elements in argv.
89: * argv - element vector :
90: * argv[0] = definition of a user
1.49 espie 91: * macro or NULL if built-in.
1.39 espie 92: * argv[1] = name of the macro or
93: * built-in.
94: * argv[2] = parameters to user-defined
95: * . macro or built-in.
96: * .
97: *
98: * A call in the form of macro-or-builtin() will result in:
99: * argv[0] = nullstr
100: * argv[1] = macro-or-builtin
101: * argv[2] = nullstr
102: *
103: * argc is 3 for macro-or-builtin() and 2 for macro-or-builtin
1.30 espie 104: */
105: void
1.50 espie 106: eval(const char *argv[], int argc, int td, int is_traced)
1.30 espie 107: {
1.35 espie 108: ssize_t mark = -1;
109:
1.34 espie 110: expansion_id++;
1.30 espie 111: if (td & RECDEF)
112: errx(1, "%s at line %lu: expanding recursive definition for %s",
113: CURRENT_NAME, CURRENT_LINE, argv[1]);
1.50 espie 114: if (is_traced)
1.35 espie 115: mark = trace(argv, argc, infile+ilevel);
1.30 espie 116: if (td == MACRTYPE)
117: expand_macro(argv, argc);
118: else
119: expand_builtin(argv, argc, td);
1.35 espie 120: if (mark != -1)
121: finish_trace(mark);
1.30 espie 122: }
123:
124: /*
125: * expand_builtin - evaluate built-in macros.
1.1 deraadt 126: */
127: void
1.44 espie 128: expand_builtin(const char *argv[], int argc, int td)
1.1 deraadt 129: {
1.17 espie 130: int c, n;
1.39 espie 131: int ac;
1.1 deraadt 132: static int sysval = 0;
133:
134: #ifdef DEBUG
135: printf("argc = %d\n", argc);
136: for (n = 0; n < argc; n++)
137: printf("argv[%d] = %s\n", n, argv[n]);
1.42 espie 138: fflush(stdout);
1.1 deraadt 139: #endif
1.22 espie 140:
1.1 deraadt 141: /*
142: * if argc == 3 and argv[2] is null, then we
143: * have macro-or-builtin() type call. We adjust
144: * argc to avoid further checking..
145: */
1.39 espie 146: ac = argc;
147:
1.1 deraadt 148: if (argc == 3 && !*(argv[2]))
149: argc--;
150:
1.22 espie 151: switch (td & TYPEMASK) {
1.1 deraadt 152:
153: case DEFITYPE:
154: if (argc > 2)
155: dodefine(argv[2], (argc > 3) ? argv[3] : null);
156: break;
157:
158: case PUSDTYPE:
159: if (argc > 2)
160: dopushdef(argv[2], (argc > 3) ? argv[3] : null);
161: break;
162:
163: case DUMPTYPE:
164: dodump(argv, argc);
165: break;
166:
1.37 espie 167: case TRACEONTYPE:
168: dotrace(argv, argc, 1);
169: break;
170:
171: case TRACEOFFTYPE:
172: dotrace(argv, argc, 0);
173: break;
174:
1.1 deraadt 175: case EXPRTYPE:
176: /*
177: * doexpr - evaluate arithmetic
178: * expression
179: */
180: if (argc > 2)
181: pbnum(expr(argv[2]));
182: break;
183:
184: case IFELTYPE:
185: if (argc > 4)
186: doifelse(argv, argc);
187: break;
188:
189: case IFDFTYPE:
190: /*
191: * doifdef - select one of two
192: * alternatives based on the existence of
193: * another definition
194: */
195: if (argc > 3) {
1.49 espie 196: if (lookup_macro_definition(argv[2]) != NULL)
1.1 deraadt 197: pbstr(argv[3]);
198: else if (argc > 4)
199: pbstr(argv[4]);
200: }
201: break;
202:
203: case LENGTYPE:
204: /*
205: * dolen - find the length of the
206: * argument
207: */
1.18 espie 208: pbnum((argc > 2) ? strlen(argv[2]) : 0);
1.1 deraadt 209: break;
210:
211: case INCRTYPE:
212: /*
213: * doincr - increment the value of the
214: * argument
215: */
216: if (argc > 2)
217: pbnum(atoi(argv[2]) + 1);
218: break;
219:
220: case DECRTYPE:
221: /*
222: * dodecr - decrement the value of the
223: * argument
224: */
225: if (argc > 2)
226: pbnum(atoi(argv[2]) - 1);
227: break;
228:
229: case SYSCTYPE:
230: /*
231: * dosys - execute system command
232: */
1.54 ! robert 233: if (argc > 2) {
! 234: fflush(stdout);
1.1 deraadt 235: sysval = system(argv[2]);
1.54 ! robert 236: }
1.1 deraadt 237: break;
238:
239: case SYSVTYPE:
240: /*
241: * dosysval - return value of the last
242: * system call.
243: *
244: */
245: pbnum(sysval);
246: break;
247:
1.27 espie 248: case ESYSCMDTYPE:
249: if (argc > 2)
250: doesyscmd(argv[2]);
251: break;
1.1 deraadt 252: case INCLTYPE:
253: if (argc > 2)
254: if (!doincl(argv[2]))
1.24 espie 255: err(1, "%s at line %lu: include(%s)",
256: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.1 deraadt 257: break;
258:
259: case SINCTYPE:
260: if (argc > 2)
261: (void) doincl(argv[2]);
262: break;
263: #ifdef EXTENDED
264: case PASTTYPE:
265: if (argc > 2)
266: if (!dopaste(argv[2]))
1.24 espie 267: err(1, "%s at line %lu: paste(%s)",
268: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.1 deraadt 269: break;
270:
271: case SPASTYPE:
272: if (argc > 2)
273: (void) dopaste(argv[2]);
274: break;
275: #endif
276: case CHNQTYPE:
1.39 espie 277: if (mimic_gnu)
278: gnu_dochq(argv, ac);
279: else
280: dochq(argv, argc);
1.1 deraadt 281: break;
282:
283: case CHNCTYPE:
1.39 espie 284: if (mimic_gnu)
285: gnu_dochc(argv, ac);
286: else
287: dochc(argv, argc);
1.1 deraadt 288: break;
289:
290: case SUBSTYPE:
291: /*
292: * dosub - select substring
293: *
294: */
295: if (argc > 3)
296: dosub(argv, argc);
297: break;
298:
299: case SHIFTYPE:
300: /*
301: * doshift - push back all arguments
302: * except the first one (i.e. skip
303: * argv[2])
304: */
305: if (argc > 3) {
306: for (n = argc - 1; n > 3; n--) {
1.10 deraadt 307: pbstr(rquote);
1.1 deraadt 308: pbstr(argv[n]);
1.10 deraadt 309: pbstr(lquote);
1.7 millert 310: putback(COMMA);
1.1 deraadt 311: }
1.10 deraadt 312: pbstr(rquote);
1.1 deraadt 313: pbstr(argv[3]);
1.10 deraadt 314: pbstr(lquote);
1.1 deraadt 315: }
316: break;
317:
318: case DIVRTYPE:
319: if (argc > 2 && (n = atoi(argv[2])) != 0)
320: dodiv(n);
321: else {
322: active = stdout;
323: oindex = 0;
324: }
325: break;
326:
327: case UNDVTYPE:
328: doundiv(argv, argc);
329: break;
330:
331: case DIVNTYPE:
332: /*
333: * dodivnum - return the number of
334: * current output diversion
335: */
336: pbnum(oindex);
337: break;
338:
339: case UNDFTYPE:
340: /*
341: * doundefine - undefine a previously
342: * defined macro(s) or m4 keyword(s).
343: */
344: if (argc > 2)
345: for (n = 2; n < argc; n++)
1.49 espie 346: macro_undefine(argv[n]);
1.1 deraadt 347: break;
348:
349: case POPDTYPE:
350: /*
351: * dopopdef - remove the topmost
352: * definitions of macro(s) or m4
353: * keyword(s).
354: */
355: if (argc > 2)
356: for (n = 2; n < argc; n++)
1.49 espie 357: macro_popdef(argv[n]);
1.1 deraadt 358: break;
359:
360: case MKTMTYPE:
361: /*
362: * dotemp - create a temporary file
363: */
1.16 espie 364: if (argc > 2) {
365: int fd;
1.20 espie 366: char *temp;
367:
368: temp = xstrdup(argv[2]);
1.16 espie 369:
1.20 espie 370: fd = mkstemp(temp);
1.16 espie 371: if (fd == -1)
1.24 espie 372: err(1,
373: "%s at line %lu: couldn't make temp file %s",
374: CURRENT_NAME, CURRENT_LINE, argv[2]);
1.16 espie 375: close(fd);
1.20 espie 376: pbstr(temp);
377: free(temp);
1.16 espie 378: }
1.1 deraadt 379: break;
380:
381: case TRNLTYPE:
382: /*
383: * dotranslit - replace all characters in
384: * the source string that appears in the
385: * "from" string with the corresponding
386: * characters in the "to" string.
387: */
388: if (argc > 3) {
1.42 espie 389: char *temp;
390:
1.51 espie 391: temp = xalloc(strlen(argv[2])+1, NULL);
1.1 deraadt 392: if (argc > 4)
393: map(temp, argv[2], argv[3], argv[4]);
394: else
395: map(temp, argv[2], argv[3], null);
396: pbstr(temp);
1.42 espie 397: free(temp);
1.8 deraadt 398: } else if (argc > 2)
1.1 deraadt 399: pbstr(argv[2]);
400: break;
401:
402: case INDXTYPE:
403: /*
404: * doindex - find the index of the second
405: * argument string in the first argument
406: * string. -1 if not present.
407: */
408: pbnum((argc > 3) ? indx(argv[2], argv[3]) : -1);
409: break;
410:
411: case ERRPTYPE:
412: /*
413: * doerrp - print the arguments to stderr
414: * file
415: */
416: if (argc > 2) {
417: for (n = 2; n < argc; n++)
418: fprintf(stderr, "%s ", argv[n]);
419: fprintf(stderr, "\n");
420: }
421: break;
422:
423: case DNLNTYPE:
424: /*
425: * dodnl - eat-up-to and including
426: * newline
427: */
428: while ((c = gpbc()) != '\n' && c != EOF)
429: ;
430: break;
431:
432: case M4WRTYPE:
433: /*
434: * dom4wrap - set up for
435: * wrap-up/wind-down activity
436: */
437: m4wraps = (argc > 2) ? xstrdup(argv[2]) : null;
438: break;
439:
440: case EXITTYPE:
441: /*
442: * doexit - immediate exit from m4.
443: */
444: killdiv();
445: exit((argc > 2) ? atoi(argv[2]) : 0);
446: break;
447:
448: case DEFNTYPE:
449: if (argc > 2)
450: for (n = 2; n < argc; n++)
451: dodefn(argv[n]);
452: break;
453:
1.25 espie 454: case INDIRTYPE: /* Indirect call */
455: if (argc > 2)
456: doindir(argv, argc);
457: break;
458:
459: case BUILTINTYPE: /* Builtins only */
460: if (argc > 2)
461: dobuiltin(argv, argc);
462: break;
463:
464: case PATSTYPE:
465: if (argc > 2)
466: dopatsubst(argv, argc);
467: break;
468: case REGEXPTYPE:
469: if (argc > 2)
470: doregexp(argv, argc);
471: break;
472: case LINETYPE:
473: doprintlineno(infile+ilevel);
474: break;
475: case FILENAMETYPE:
476: doprintfilename(infile+ilevel);
477: break;
1.23 espie 478: case SELFTYPE:
479: pbstr(rquote);
480: pbstr(argv[1]);
481: pbstr(lquote);
482: break;
1.1 deraadt 483: default:
1.24 espie 484: errx(1, "%s at line %lu: eval: major botch.",
485: CURRENT_NAME, CURRENT_LINE);
1.1 deraadt 486: break;
487: }
488: }
489:
490: /*
1.30 espie 491: * expand_macro - user-defined macro expansion
1.1 deraadt 492: */
493: void
1.44 espie 494: expand_macro(const char *argv[], int argc)
1.1 deraadt 495: {
1.20 espie 496: const char *t;
497: const char *p;
1.17 espie 498: int n;
499: int argno;
1.1 deraadt 500:
501: t = argv[0]; /* defn string as a whole */
502: p = t;
503: while (*p)
504: p++;
505: p--; /* last character of defn */
506: while (p > t) {
507: if (*(p - 1) != ARGFLAG)
1.36 espie 508: PUTBACK(*p);
1.1 deraadt 509: else {
510: switch (*p) {
511:
512: case '#':
513: pbnum(argc - 2);
514: break;
515: case '0':
516: case '1':
517: case '2':
518: case '3':
519: case '4':
520: case '5':
521: case '6':
522: case '7':
523: case '8':
524: case '9':
525: if ((argno = *p - '0') < argc - 1)
526: pbstr(argv[argno + 1]);
527: break;
528: case '*':
1.41 espie 529: if (argc > 2) {
530: for (n = argc - 1; n > 2; n--) {
531: pbstr(argv[n]);
532: putback(COMMA);
533: }
534: pbstr(argv[2]);
535: }
1.1 deraadt 536: break;
1.7 millert 537: case '@':
1.41 espie 538: if (argc > 2) {
539: for (n = argc - 1; n > 2; n--) {
540: pbstr(rquote);
541: pbstr(argv[n]);
542: pbstr(lquote);
543: putback(COMMA);
544: }
545: pbstr(rquote);
546: pbstr(argv[2]);
547: pbstr(lquote);
548: }
1.7 millert 549: break;
1.1 deraadt 550: default:
1.36 espie 551: PUTBACK(*p);
552: PUTBACK('$');
1.1 deraadt 553: break;
554: }
555: p--;
556: }
557: p--;
558: }
559: if (p == t) /* do last character */
1.36 espie 560: PUTBACK(*p);
1.1 deraadt 561: }
562:
1.48 espie 563:
1.1 deraadt 564: /*
1.48 espie 565: * dodefine - install definition in the table
566: */
567: void
568: dodefine(const char *name, const char *defn)
569: {
570: if (!*name)
571: errx(1, "%s at line %lu: null definition.", CURRENT_NAME,
572: CURRENT_LINE);
1.49 espie 573: macro_define(name, defn);
1.1 deraadt 574: }
575:
576: /*
577: * dodefn - push back a quoted definition of
578: * the given name.
579: */
1.20 espie 580: static void
1.44 espie 581: dodefn(const char *name)
1.1 deraadt 582: {
1.49 espie 583: struct macro_definition *p;
1.1 deraadt 584:
1.49 espie 585: if ((p = lookup_macro_definition(name)) != NULL) {
1.48 espie 586: if ((p->type & TYPEMASK) == MACRTYPE) {
1.40 espie 587: pbstr(rquote);
588: pbstr(p->defn);
589: pbstr(lquote);
1.48 espie 590: } else {
591: pbstr(p->defn);
1.31 espie 592: pbstr(BUILTIN_MARKER);
593: }
1.1 deraadt 594: }
595: }
596:
597: /*
598: * dopushdef - install a definition in the hash table
599: * without removing a previous definition. Since
600: * each new entry is entered in *front* of the
601: * hash bucket, it hides a previous definition from
602: * lookup.
603: */
1.20 espie 604: static void
1.44 espie 605: dopushdef(const char *name, const char *defn)
1.1 deraadt 606: {
607: if (!*name)
1.24 espie 608: errx(1, "%s at line %lu: null definition", CURRENT_NAME,
609: CURRENT_LINE);
1.49 espie 610: macro_pushdef(name, defn);
1.1 deraadt 611: }
612:
613: /*
1.32 espie 614: * dump_one_def - dump the specified definition.
615: */
616: static void
1.49 espie 617: dump_one_def(const char *name, struct macro_definition *p)
1.32 espie 618: {
1.53 espie 619: if (!traceout)
620: traceout = stderr;
1.33 espie 621: if (mimic_gnu) {
622: if ((p->type & TYPEMASK) == MACRTYPE)
1.49 espie 623: fprintf(traceout, "%s:\t%s\n", name, p->defn);
1.33 espie 624: else {
1.49 espie 625: fprintf(traceout, "%s:\t<%s>\n", name, p->defn);
1.33 espie 626: }
627: } else
1.49 espie 628: fprintf(traceout, "`%s'\t`%s'\n", name, p->defn);
1.32 espie 629: }
630:
631: /*
1.1 deraadt 632: * dodumpdef - dump the specified definitions in the hash
633: * table to stderr. If nothing is specified, the entire
634: * hash table is dumped.
635: */
1.20 espie 636: static void
1.44 espie 637: dodump(const char *argv[], int argc)
1.1 deraadt 638: {
1.17 espie 639: int n;
1.49 espie 640: struct macro_definition *p;
1.1 deraadt 641:
642: if (argc > 2) {
643: for (n = 2; n < argc; n++)
1.49 espie 644: if ((p = lookup_macro_definition(argv[n])) != NULL)
645: dump_one_def(argv[n], p);
646: } else
647: macro_for_all(dump_one_def);
1.37 espie 648: }
649:
650: /*
651: * dotrace - mark some macros as traced/untraced depending upon on.
652: */
653: static void
1.44 espie 654: dotrace(const char *argv[], int argc, int on)
1.37 espie 655: {
656: int n;
657:
658: if (argc > 2) {
659: for (n = 2; n < argc; n++)
660: mark_traced(argv[n], on);
661: } else
662: mark_traced(NULL, on);
1.1 deraadt 663: }
664:
665: /*
666: * doifelse - select one of two alternatives - loop.
667: */
1.20 espie 668: static void
1.44 espie 669: doifelse(const char *argv[], int argc)
1.1 deraadt 670: {
671: cycle {
672: if (STREQ(argv[2], argv[3]))
673: pbstr(argv[4]);
674: else if (argc == 6)
675: pbstr(argv[5]);
676: else if (argc > 6) {
677: argv += 3;
678: argc -= 3;
679: continue;
680: }
681: break;
682: }
683: }
684:
685: /*
686: * doinclude - include a given file.
687: */
1.20 espie 688: static int
1.44 espie 689: doincl(const char *ifile)
1.1 deraadt 690: {
691: if (ilevel + 1 == MAXINP)
1.24 espie 692: errx(1, "%s at line %lu: too many include files.",
693: CURRENT_NAME, CURRENT_LINE);
694: if (fopen_trypath(infile+ilevel+1, ifile) != NULL) {
1.1 deraadt 695: ilevel++;
696: bbase[ilevel] = bufbase = bp;
697: return (1);
1.8 deraadt 698: } else
1.1 deraadt 699: return (0);
700: }
701:
702: #ifdef EXTENDED
703: /*
704: * dopaste - include a given file without any
705: * macro processing.
706: */
1.20 espie 707: static int
1.44 espie 708: dopaste(const char *pfile)
1.1 deraadt 709: {
710: FILE *pf;
1.17 espie 711: int c;
1.1 deraadt 712:
713: if ((pf = fopen(pfile, "r")) != NULL) {
1.45 espie 714: if (synch_lines)
715: fprintf(active, "#line 1 \"%s\"\n", pfile);
1.1 deraadt 716: while ((c = getc(pf)) != EOF)
717: putc(c, active);
718: (void) fclose(pf);
1.45 espie 719: emit_synchline();
1.1 deraadt 720: return (1);
1.8 deraadt 721: } else
1.1 deraadt 722: return (0);
723: }
724: #endif
725:
1.39 espie 726: static void
1.44 espie 727: gnu_dochq(const char *argv[], int ac)
1.39 espie 728: {
729: /* In gnu-m4 mode, the only way to restore quotes is to have no
730: * arguments at all. */
731: if (ac == 2) {
732: lquote[0] = LQUOTE, lquote[1] = EOS;
733: rquote[0] = RQUOTE, rquote[1] = EOS;
734: } else {
735: strlcpy(lquote, argv[2], sizeof(lquote));
736: if(ac > 3)
737: strlcpy(rquote, argv[3], sizeof(rquote));
738: else
739: rquote[0] = EOS;
740: }
741: }
742:
1.1 deraadt 743: /*
744: * dochq - change quote characters
745: */
1.20 espie 746: static void
1.44 espie 747: dochq(const char *argv[], int argc)
1.1 deraadt 748: {
749: if (argc > 2) {
1.9 deraadt 750: if (*argv[2])
1.21 espie 751: strlcpy(lquote, argv[2], sizeof(lquote));
1.9 deraadt 752: else {
753: lquote[0] = LQUOTE;
1.14 espie 754: lquote[1] = EOS;
1.9 deraadt 755: }
1.1 deraadt 756: if (argc > 3) {
757: if (*argv[3])
1.21 espie 758: strlcpy(rquote, argv[3], sizeof(rquote));
1.8 deraadt 759: } else
1.46 espie 760: strlcpy(rquote, lquote, sizeof(rquote));
1.8 deraadt 761: } else {
1.14 espie 762: lquote[0] = LQUOTE, lquote[1] = EOS;
763: rquote[0] = RQUOTE, rquote[1] = EOS;
1.1 deraadt 764: }
765: }
766:
1.39 espie 767: static void
1.44 espie 768: gnu_dochc(const char *argv[], int ac)
1.39 espie 769: {
770: /* In gnu-m4 mode, no arguments mean no comment
771: * arguments at all. */
772: if (ac == 2) {
773: scommt[0] = EOS;
774: ecommt[0] = EOS;
775: } else {
776: if (*argv[2])
777: strlcpy(scommt, argv[2], sizeof(scommt));
778: else
779: scommt[0] = SCOMMT, scommt[1] = EOS;
780: if(ac > 3 && *argv[3])
781: strlcpy(ecommt, argv[3], sizeof(ecommt));
782: else
783: ecommt[0] = ECOMMT, ecommt[1] = EOS;
784: }
785: }
1.1 deraadt 786: /*
787: * dochc - change comment characters
788: */
1.20 espie 789: static void
1.44 espie 790: dochc(const char *argv[], int argc)
1.1 deraadt 791: {
792: if (argc > 2) {
793: if (*argv[2])
1.21 espie 794: strlcpy(scommt, argv[2], sizeof(scommt));
1.1 deraadt 795: if (argc > 3) {
796: if (*argv[3])
1.21 espie 797: strlcpy(ecommt, argv[3], sizeof(ecommt));
1.1 deraadt 798: }
799: else
1.14 espie 800: ecommt[0] = ECOMMT, ecommt[1] = EOS;
1.1 deraadt 801: }
802: else {
1.14 espie 803: scommt[0] = SCOMMT, scommt[1] = EOS;
804: ecommt[0] = ECOMMT, ecommt[1] = EOS;
1.1 deraadt 805: }
806: }
807:
808: /*
809: * dodivert - divert the output to a temporary file
810: */
1.20 espie 811: static void
1.44 espie 812: dodiv(int n)
1.1 deraadt 813: {
1.6 millert 814: int fd;
815:
1.8 deraadt 816: oindex = n;
1.28 espie 817: if (n >= maxout) {
818: if (mimic_gnu)
819: resizedivs(n + 10);
820: else
821: n = 0; /* bitbucket */
822: }
823:
824: if (n < 0)
1.1 deraadt 825: n = 0; /* bitbucket */
826: if (outfile[n] == NULL) {
1.13 espie 827: char fname[] = _PATH_DIVNAME;
828:
829: if ((fd = mkstemp(fname)) < 0 ||
830: (outfile[n] = fdopen(fd, "w+")) == NULL)
831: err(1, "%s: cannot divert", fname);
832: if (unlink(fname) == -1)
833: err(1, "%s: cannot unlink", fname);
1.1 deraadt 834: }
835: active = outfile[n];
836: }
837:
838: /*
839: * doundivert - undivert a specified output, or all
840: * other outputs, in numerical order.
841: */
1.20 espie 842: static void
1.44 espie 843: doundiv(const char *argv[], int argc)
1.1 deraadt 844: {
1.17 espie 845: int ind;
846: int n;
1.1 deraadt 847:
848: if (argc > 2) {
849: for (ind = 2; ind < argc; ind++) {
850: n = atoi(argv[ind]);
1.28 espie 851: if (n > 0 && n < maxout && outfile[n] != NULL)
1.1 deraadt 852: getdiv(n);
853:
854: }
855: }
856: else
1.28 espie 857: for (n = 1; n < maxout; n++)
1.1 deraadt 858: if (outfile[n] != NULL)
859: getdiv(n);
860: }
861:
862: /*
863: * dosub - select substring
864: */
1.20 espie 865: static void
1.44 espie 866: dosub(const char *argv[], int argc)
1.1 deraadt 867: {
1.20 espie 868: const char *ap, *fc, *k;
1.17 espie 869: int nc;
1.1 deraadt 870:
1.29 espie 871: ap = argv[2]; /* target string */
1.1 deraadt 872: #ifdef EXPR
1.29 espie 873: fc = ap + expr(argv[3]); /* first char */
1.1 deraadt 874: #else
1.29 espie 875: fc = ap + atoi(argv[3]); /* first char */
1.1 deraadt 876: #endif
1.29 espie 877: nc = strlen(fc);
878: if (argc >= 5)
1.1 deraadt 879: #ifdef EXPR
1.29 espie 880: nc = min(nc, expr(argv[4]));
1.1 deraadt 881: #else
1.29 espie 882: nc = min(nc, atoi(argv[4]));
1.1 deraadt 883: #endif
884: if (fc >= ap && fc < ap + strlen(ap))
1.29 espie 885: for (k = fc + nc - 1; k >= fc; k--)
1.1 deraadt 886: putback(*k);
887: }
888:
889: /*
890: * map:
891: * map every character of s1 that is specified in from
892: * into s3 and replace in s. (source s1 remains untouched)
893: *
894: * This is a standard implementation of map(s,from,to) function of ICON
895: * language. Within mapvec, we replace every character of "from" with
896: * the corresponding character in "to". If "to" is shorter than "from",
897: * than the corresponding entries are null, which means that those
898: * characters dissapear altogether. Furthermore, imagine
899: * map(dest, "sourcestring", "srtin", "rn..*") type call. In this case,
900: * `s' maps to `r', `r' maps to `n' and `n' maps to `*'. Thus, `s'
901: * ultimately maps to `*'. In order to achieve this effect in an efficient
902: * manner (i.e. without multiple passes over the destination string), we
903: * loop over mapvec, starting with the initial source character. if the
904: * character value (dch) in this location is different than the source
905: * character (sch), sch becomes dch, once again to index into mapvec, until
906: * the character value stabilizes (i.e. sch = dch, in other words
907: * mapvec[n] == n). Even if the entry in the mapvec is null for an ordinary
908: * character, it will stabilize, since mapvec[0] == 0 at all times. At the
909: * end, we restore mapvec* back to normal where mapvec[n] == n for
910: * 0 <= n <= 127. This strategy, along with the restoration of mapvec, is
911: * about 5 times faster than any algorithm that makes multiple passes over
912: * destination string.
913: */
1.20 espie 914: static void
1.44 espie 915: map(char *dest, const char *src, const char *from, const char *to)
1.1 deraadt 916: {
1.20 espie 917: const char *tmp;
1.19 espie 918: unsigned char sch, dch;
1.26 espie 919: static char frombis[257];
920: static char tobis[257];
1.19 espie 921: static unsigned char mapvec[256] = {
922: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
923: 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
924: 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
925: 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
926: 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86,
927: 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102,
928: 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
929: 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128,
930: 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
931: 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154,
932: 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167,
933: 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180,
934: 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193,
935: 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206,
936: 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
937: 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
938: 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245,
939: 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
1.1 deraadt 940: };
941:
942: if (*src) {
1.26 espie 943: if (mimic_gnu) {
944: /*
945: * expand character ranges on the fly
946: */
947: from = handledash(frombis, frombis + 256, from);
948: to = handledash(tobis, tobis + 256, to);
949: }
1.1 deraadt 950: tmp = from;
951: /*
952: * create a mapping between "from" and
953: * "to"
954: */
955: while (*from)
1.19 espie 956: mapvec[(unsigned char)(*from++)] = (*to) ?
957: (unsigned char)(*to++) : 0;
1.1 deraadt 958:
959: while (*src) {
1.19 espie 960: sch = (unsigned char)(*src++);
1.1 deraadt 961: dch = mapvec[sch];
962: while (dch != sch) {
963: sch = dch;
964: dch = mapvec[sch];
965: }
1.19 espie 966: if ((*dest = (char)dch))
1.1 deraadt 967: dest++;
968: }
969: /*
970: * restore all the changed characters
971: */
972: while (*tmp) {
1.19 espie 973: mapvec[(unsigned char)(*tmp)] = (unsigned char)(*tmp);
1.1 deraadt 974: tmp++;
975: }
976: }
1.19 espie 977: *dest = '\0';
1.1 deraadt 978: }
1.26 espie 979:
980:
981: /*
982: * handledash:
983: * use buffer to copy the src string, expanding character ranges
984: * on the way.
985: */
986: static const char *
1.44 espie 987: handledash(char *buffer, char *end, const char *src)
1.26 espie 988: {
989: char *p;
990:
991: p = buffer;
992: while(*src) {
993: if (src[1] == '-' && src[2]) {
994: unsigned char i;
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: 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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