Annotation of src/usr.bin/mandoc/mandoc.c, Revision 1.26
1.26 ! schwarze 1: /* $Id: mandoc.c,v 1.25 2011/04/24 16:22:02 schwarze Exp $ */
1.1 schwarze 2: /*
1.24 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.21 schwarze 4: * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
1.21 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.21 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1 schwarze 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
1.2 schwarze 18: #include <sys/types.h>
19:
1.1 schwarze 20: #include <assert.h>
21: #include <ctype.h>
1.26 ! schwarze 22: #include <errno.h>
! 23: #include <limits.h>
1.1 schwarze 24: #include <stdlib.h>
1.4 schwarze 25: #include <stdio.h>
26: #include <string.h>
1.5 schwarze 27: #include <time.h>
1.1 schwarze 28:
1.14 schwarze 29: #include "mandoc.h"
1.1 schwarze 30: #include "libmandoc.h"
31:
1.22 schwarze 32: #define DATESIZE 32
33:
1.14 schwarze 34: static int a2time(time_t *, const char *, const char *);
1.22 schwarze 35: static char *time2a(time_t);
1.26 ! schwarze 36: static int numescape(const char *);
1.5 schwarze 37:
1.26 ! schwarze 38: /*
! 39: * Pass over recursive numerical expressions. This context of this
! 40: * function is important: it's only called within character-terminating
! 41: * escapes (e.g., \s[xxxyyy]), so all we need to do is handle initial
! 42: * recursion: we don't care about what's in these blocks.
! 43: * This returns the number of characters skipped or -1 if an error
! 44: * occurs (the caller should bail).
! 45: */
! 46: static int
! 47: numescape(const char *start)
1.1 schwarze 48: {
1.26 ! schwarze 49: int i;
! 50: size_t sz;
! 51: const char *cp;
! 52:
! 53: i = 0;
! 54:
! 55: /* The expression consists of a subexpression. */
! 56:
! 57: if ('\\' == start[i]) {
! 58: cp = &start[++i];
! 59: /*
! 60: * Read past the end of the subexpression.
! 61: * Bail immediately on errors.
! 62: */
! 63: if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
! 64: return(-1);
! 65: return(i + cp - &start[i]);
! 66: }
! 67:
! 68: if ('(' != start[i++])
! 69: return(0);
1.14 schwarze 70:
1.26 ! schwarze 71: /*
! 72: * A parenthesised subexpression. Read until the closing
! 73: * parenthesis, making sure to handle any nested subexpressions
! 74: * that might ruin our parse.
! 75: */
! 76:
! 77: while (')' != start[i]) {
! 78: sz = strcspn(&start[i], ")\\");
! 79: i += (int)sz;
! 80:
! 81: if ('\0' == start[i])
! 82: return(-1);
! 83: else if ('\\' != start[i])
! 84: continue;
! 85:
! 86: cp = &start[++i];
! 87: if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
! 88: return(-1);
! 89: i += cp - &start[i];
! 90: }
! 91:
! 92: /* Read past the terminating ')'. */
! 93: return(++i);
! 94: }
! 95:
! 96: enum mandoc_esc
! 97: mandoc_escape(const char **end, const char **start, int *sz)
! 98: {
! 99: char c, term, numeric;
! 100: int i, lim, ssz, rlim;
! 101: const char *cp, *rstart;
! 102: enum mandoc_esc gly;
! 103:
! 104: cp = *end;
! 105: rstart = cp;
! 106: if (start)
! 107: *start = rstart;
! 108: i = lim = 0;
! 109: gly = ESCAPE_ERROR;
! 110: term = numeric = '\0';
! 111:
! 112: switch ((c = cp[i++])) {
! 113: /*
! 114: * First the glyphs. There are several different forms of
! 115: * these, but each eventually returns a substring of the glyph
! 116: * name.
! 117: */
! 118: case ('('):
! 119: gly = ESCAPE_SPECIAL;
! 120: lim = 2;
! 121: break;
! 122: case ('['):
! 123: gly = ESCAPE_SPECIAL;
! 124: /*
! 125: * Unicode escapes are defined in groff as \[uXXXX] to
! 126: * \[u10FFFF], where the contained value must be a valid
! 127: * Unicode codepoint. Here, however, only check whether
! 128: * it's not a zero-width escape.
! 129: */
! 130: if ('u' == cp[i] && ']' != cp[i + 1])
! 131: gly = ESCAPE_UNICODE;
! 132: term = ']';
! 133: break;
! 134: case ('C'):
! 135: if ('\'' != cp[i])
! 136: return(ESCAPE_ERROR);
! 137: gly = ESCAPE_SPECIAL;
! 138: term = '\'';
! 139: break;
1.1 schwarze 140:
1.26 ! schwarze 141: /*
! 142: * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
! 143: * 'X' is the trigger. These have opaque sub-strings.
! 144: */
! 145: case ('F'):
1.16 schwarze 146: /* FALLTHROUGH */
1.26 ! schwarze 147: case ('g'):
1.16 schwarze 148: /* FALLTHROUGH */
1.26 ! schwarze 149: case ('k'):
1.1 schwarze 150: /* FALLTHROUGH */
1.26 ! schwarze 151: case ('M'):
1.14 schwarze 152: /* FALLTHROUGH */
1.26 ! schwarze 153: case ('m'):
1.1 schwarze 154: /* FALLTHROUGH */
1.26 ! schwarze 155: case ('n'):
1.1 schwarze 156: /* FALLTHROUGH */
1.26 ! schwarze 157: case ('V'):
1.1 schwarze 158: /* FALLTHROUGH */
1.26 ! schwarze 159: case ('Y'):
! 160: if (ESCAPE_ERROR == gly)
! 161: gly = ESCAPE_IGNORE;
1.1 schwarze 162: /* FALLTHROUGH */
1.26 ! schwarze 163: case ('f'):
! 164: if (ESCAPE_ERROR == gly)
! 165: gly = ESCAPE_FONT;
! 166:
! 167: rstart= &cp[i];
! 168: if (start)
! 169: *start = rstart;
! 170:
! 171: switch (cp[i++]) {
! 172: case ('('):
! 173: lim = 2;
! 174: break;
! 175: case ('['):
! 176: term = ']';
! 177: break;
! 178: default:
! 179: lim = 1;
! 180: i--;
! 181: break;
! 182: }
! 183: break;
! 184:
! 185: /*
! 186: * These escapes are of the form \X'Y', where 'X' is the trigger
! 187: * and 'Y' is any string. These have opaque sub-strings.
! 188: */
! 189: case ('A'):
1.13 schwarze 190: /* FALLTHROUGH */
1.26 ! schwarze 191: case ('b'):
1.1 schwarze 192: /* FALLTHROUGH */
1.16 schwarze 193: case ('D'):
1.1 schwarze 194: /* FALLTHROUGH */
1.26 ! schwarze 195: case ('o'):
1.1 schwarze 196: /* FALLTHROUGH */
1.26 ! schwarze 197: case ('R'):
1.1 schwarze 198: /* FALLTHROUGH */
1.26 ! schwarze 199: case ('X'):
1.1 schwarze 200: /* FALLTHROUGH */
1.26 ! schwarze 201: case ('Z'):
! 202: if ('\'' != cp[i++])
! 203: return(ESCAPE_ERROR);
! 204: gly = ESCAPE_IGNORE;
1.16 schwarze 205: term = '\'';
206: break;
1.26 ! schwarze 207:
! 208: /*
! 209: * These escapes are of the form \X'N', where 'X' is the trigger
! 210: * and 'N' resolves to a numerical expression.
! 211: */
! 212: case ('B'):
! 213: /* FALLTHROUGH */
1.17 schwarze 214: case ('h'):
215: /* FALLTHROUGH */
1.26 ! schwarze 216: case ('H'):
! 217: /* FALLTHROUGH */
! 218: case ('L'):
! 219: /* FALLTHROUGH */
! 220: case ('l'):
! 221: /* FALLTHROUGH */
! 222: case ('N'):
! 223: if (ESCAPE_ERROR == gly)
! 224: gly = ESCAPE_NUMBERED;
! 225: /* FALLTHROUGH */
! 226: case ('S'):
! 227: /* FALLTHROUGH */
1.17 schwarze 228: case ('v'):
229: /* FALLTHROUGH */
1.26 ! schwarze 230: case ('w'):
! 231: /* FALLTHROUGH */
! 232: case ('x'):
! 233: if (ESCAPE_ERROR == gly)
! 234: gly = ESCAPE_IGNORE;
! 235: if ('\'' != cp[i++])
! 236: return(ESCAPE_ERROR);
! 237: term = numeric = '\'';
! 238: break;
! 239:
! 240: /*
! 241: * Sizes get a special category of their own.
! 242: */
1.6 schwarze 243: case ('s'):
1.26 ! schwarze 244: gly = ESCAPE_IGNORE;
1.17 schwarze 245:
1.26 ! schwarze 246: rstart = &cp[i];
! 247: if (start)
! 248: *start = rstart;
! 249:
! 250: /* See +/- counts as a sign. */
! 251: c = cp[i];
! 252: if ('+' == c || '-' == c || ASCII_HYPH == c)
! 253: ++i;
1.6 schwarze 254:
1.26 ! schwarze 255: switch (cp[i++]) {
1.16 schwarze 256: case ('('):
1.26 ! schwarze 257: lim = 2;
1.16 schwarze 258: break;
259: case ('['):
1.26 ! schwarze 260: term = numeric = ']';
1.16 schwarze 261: break;
262: case ('\''):
1.26 ! schwarze 263: term = numeric = '\'';
1.16 schwarze 264: break;
265: default:
1.26 ! schwarze 266: lim = 1;
! 267: i--;
1.16 schwarze 268: break;
1.6 schwarze 269: }
270:
1.26 ! schwarze 271: /* See +/- counts as a sign. */
! 272: c = cp[i];
! 273: if ('+' == c || '-' == c || ASCII_HYPH == c)
! 274: ++i;
! 275:
! 276: break;
! 277:
! 278: /*
! 279: * Anything else is assumed to be a glyph.
! 280: */
! 281: default:
! 282: gly = ESCAPE_SPECIAL;
! 283: lim = 1;
! 284: i--;
! 285: break;
! 286: }
! 287:
! 288: assert(ESCAPE_ERROR != gly);
! 289:
! 290: rstart = &cp[i];
! 291: if (start)
! 292: *start = rstart;
! 293:
! 294: /*
! 295: * If a terminating block has been specified, we need to
! 296: * handle the case of recursion, which could have their
! 297: * own terminating blocks that mess up our parse. This, by the
! 298: * way, means that the "start" and "size" values will be
! 299: * effectively meaningless.
! 300: */
! 301:
! 302: ssz = 0;
! 303: if (numeric && -1 == (ssz = numescape(&cp[i])))
! 304: return(ESCAPE_ERROR);
! 305:
! 306: i += ssz;
! 307: rlim = -1;
! 308:
! 309: /*
! 310: * We have a character terminator. Try to read up to that
! 311: * character. If we can't (i.e., we hit the nil), then return
! 312: * an error; if we can, calculate our length, read past the
! 313: * terminating character, and exit.
! 314: */
! 315:
! 316: if ('\0' != term) {
! 317: *end = strchr(&cp[i], term);
! 318: if ('\0' == *end)
! 319: return(ESCAPE_ERROR);
! 320:
! 321: rlim = *end - &cp[i];
! 322: if (sz)
! 323: *sz = rlim;
! 324: (*end)++;
! 325: goto out;
! 326: }
! 327:
! 328: assert(lim > 0);
! 329:
! 330: /*
! 331: * We have a numeric limit. If the string is shorter than that,
! 332: * stop and return an error. Else adjust our endpoint, length,
! 333: * and return the current glyph.
! 334: */
! 335:
! 336: if ((size_t)lim > strlen(&cp[i]))
! 337: return(ESCAPE_ERROR);
! 338:
! 339: rlim = lim;
! 340: if (sz)
! 341: *sz = rlim;
1.19 schwarze 342:
1.26 ! schwarze 343: *end = &cp[i] + lim;
! 344:
! 345: out:
! 346: assert(rlim >= 0 && rstart);
1.19 schwarze 347:
1.26 ! schwarze 348: /* Run post-processors. */
1.19 schwarze 349:
1.26 ! schwarze 350: switch (gly) {
! 351: case (ESCAPE_FONT):
! 352: if (1 != rlim)
! 353: break;
! 354: switch (*rstart) {
! 355: case ('3'):
! 356: /* FALLTHROUGH */
! 357: case ('B'):
! 358: gly = ESCAPE_FONTBOLD;
! 359: break;
! 360: case ('2'):
! 361: /* FALLTHROUGH */
! 362: case ('I'):
! 363: gly = ESCAPE_FONTITALIC;
1.16 schwarze 364: break;
1.26 ! schwarze 365: case ('P'):
! 366: gly = ESCAPE_FONTPREV;
1.16 schwarze 367: break;
1.26 ! schwarze 368: case ('1'):
! 369: /* FALLTHROUGH */
! 370: case ('R'):
! 371: gly = ESCAPE_FONTROMAN;
1.1 schwarze 372: break;
373: }
1.16 schwarze 374: break;
1.26 ! schwarze 375: case (ESCAPE_SPECIAL):
! 376: if (1 != rlim)
! 377: break;
! 378: if ('c' == *rstart)
! 379: gly = ESCAPE_NOSPACE;
1.16 schwarze 380: break;
1.1 schwarze 381: default:
1.16 schwarze 382: break;
1.1 schwarze 383: }
384:
1.26 ! schwarze 385: return(gly);
1.1 schwarze 386: }
387:
1.4 schwarze 388: void *
389: mandoc_calloc(size_t num, size_t size)
390: {
391: void *ptr;
392:
393: ptr = calloc(num, size);
394: if (NULL == ptr) {
395: perror(NULL);
1.20 schwarze 396: exit((int)MANDOCLEVEL_SYSERR);
1.4 schwarze 397: }
398:
399: return(ptr);
400: }
401:
402:
403: void *
404: mandoc_malloc(size_t size)
405: {
406: void *ptr;
407:
408: ptr = malloc(size);
409: if (NULL == ptr) {
410: perror(NULL);
1.20 schwarze 411: exit((int)MANDOCLEVEL_SYSERR);
1.4 schwarze 412: }
413:
414: return(ptr);
415: }
416:
417:
418: void *
419: mandoc_realloc(void *ptr, size_t size)
420: {
421:
422: ptr = realloc(ptr, size);
423: if (NULL == ptr) {
424: perror(NULL);
1.20 schwarze 425: exit((int)MANDOCLEVEL_SYSERR);
1.4 schwarze 426: }
427:
428: return(ptr);
429: }
430:
431:
432: char *
433: mandoc_strdup(const char *ptr)
434: {
435: char *p;
436:
437: p = strdup(ptr);
438: if (NULL == p) {
439: perror(NULL);
1.20 schwarze 440: exit((int)MANDOCLEVEL_SYSERR);
1.4 schwarze 441: }
442:
443: return(p);
1.21 schwarze 444: }
445:
446: /*
447: * Parse a quoted or unquoted roff-style request or macro argument.
448: * Return a pointer to the parsed argument, which is either the original
449: * pointer or advanced by one byte in case the argument is quoted.
450: * Null-terminate the argument in place.
451: * Collapse pairs of quotes inside quoted arguments.
452: * Advance the argument pointer to the next argument,
453: * or to the null byte terminating the argument line.
454: */
455: char *
1.25 schwarze 456: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.21 schwarze 457: {
458: char *start, *cp;
459: int quoted, pairs, white;
460:
461: /* Quoting can only start with a new word. */
462: start = *cpp;
1.26 ! schwarze 463: quoted = 0;
1.21 schwarze 464: if ('"' == *start) {
465: quoted = 1;
466: start++;
1.26 ! schwarze 467: }
1.21 schwarze 468:
469: pairs = 0;
470: white = 0;
471: for (cp = start; '\0' != *cp; cp++) {
472: /* Move left after quoted quotes and escaped backslashes. */
473: if (pairs)
474: cp[-pairs] = cp[0];
475: if ('\\' == cp[0]) {
476: if ('\\' == cp[1]) {
477: /* Poor man's copy mode. */
478: pairs++;
479: cp++;
480: } else if (0 == quoted && ' ' == cp[1])
481: /* Skip escaped blanks. */
482: cp++;
483: } else if (0 == quoted) {
484: if (' ' == cp[0]) {
485: /* Unescaped blanks end unquoted args. */
486: white = 1;
487: break;
488: }
489: } else if ('"' == cp[0]) {
490: if ('"' == cp[1]) {
491: /* Quoted quotes collapse. */
492: pairs++;
493: cp++;
494: } else {
495: /* Unquoted quotes end quoted args. */
496: quoted = 2;
497: break;
498: }
499: }
500: }
501:
502: /* Quoted argument without a closing quote. */
1.25 schwarze 503: if (1 == quoted)
504: mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
1.21 schwarze 505:
506: /* Null-terminate this argument and move to the next one. */
507: if (pairs)
508: cp[-pairs] = '\0';
509: if ('\0' != *cp) {
510: *cp++ = '\0';
511: while (' ' == *cp)
512: cp++;
513: }
1.24 schwarze 514: *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.21 schwarze 515: *cpp = cp;
516:
1.25 schwarze 517: if ('\0' == *cp && (white || ' ' == cp[-1]))
518: mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
1.21 schwarze 519:
520: return(start);
1.4 schwarze 521: }
1.5 schwarze 522:
523: static int
524: a2time(time_t *t, const char *fmt, const char *p)
525: {
526: struct tm tm;
527: char *pp;
528:
529: memset(&tm, 0, sizeof(struct tm));
530:
531: pp = strptime(p, fmt, &tm);
532: if (NULL != pp && '\0' == *pp) {
533: *t = mktime(&tm);
534: return(1);
535: }
536:
537: return(0);
538: }
539:
1.22 schwarze 540: static char *
541: time2a(time_t t)
542: {
543: struct tm tm;
1.23 schwarze 544: char *buf, *p;
545: size_t ssz;
1.22 schwarze 546: int isz;
547:
548: localtime_r(&t, &tm);
549:
1.23 schwarze 550: /*
551: * Reserve space:
552: * up to 9 characters for the month (September) + blank
553: * up to 2 characters for the day + comma + blank
554: * 4 characters for the year and a terminating '\0'
555: */
556: p = buf = mandoc_malloc(10 + 4 + 4 + 1);
557:
558: if (0 == (ssz = strftime(p, 10 + 1, "%B ", &tm)))
559: goto fail;
560: p += (int)ssz;
1.22 schwarze 561:
1.23 schwarze 562: if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm.tm_mday)))
563: goto fail;
1.22 schwarze 564: p += isz;
565:
1.23 schwarze 566: if (0 == strftime(p, 4 + 1, "%Y", &tm))
567: goto fail;
568: return(buf);
569:
570: fail:
571: free(buf);
572: return(NULL);
1.22 schwarze 573: }
574:
575: char *
1.25 schwarze 576: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.5 schwarze 577: {
1.22 schwarze 578: char *out;
1.5 schwarze 579: time_t t;
580:
1.22 schwarze 581: if (NULL == in || '\0' == *in ||
582: 0 == strcmp(in, "$" "Mdocdate$")) {
1.25 schwarze 583: mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
1.22 schwarze 584: time(&t);
585: }
586: else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
587: !a2time(&t, "%b %d, %Y", in) &&
588: !a2time(&t, "%Y-%m-%d", in)) {
1.25 schwarze 589: mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
1.22 schwarze 590: t = 0;
1.5 schwarze 591: }
1.22 schwarze 592: out = t ? time2a(t) : NULL;
1.23 schwarze 593: return(out ? out : mandoc_strdup(in));
1.5 schwarze 594: }
595:
1.9 schwarze 596: int
1.15 schwarze 597: mandoc_eos(const char *p, size_t sz, int enclosed)
1.9 schwarze 598: {
1.15 schwarze 599: const char *q;
1.16 schwarze 600: int found;
1.9 schwarze 601:
1.10 schwarze 602: if (0 == sz)
603: return(0);
1.9 schwarze 604:
1.11 schwarze 605: /*
606: * End-of-sentence recognition must include situations where
607: * some symbols, such as `)', allow prior EOS punctuation to
1.26 ! schwarze 608: * propagate outward.
1.11 schwarze 609: */
610:
1.16 schwarze 611: found = 0;
612: for (q = p + (int)sz - 1; q >= p; q--) {
1.15 schwarze 613: switch (*q) {
1.11 schwarze 614: case ('\"'):
615: /* FALLTHROUGH */
616: case ('\''):
617: /* FALLTHROUGH */
618: case (']'):
619: /* FALLTHROUGH */
620: case (')'):
1.15 schwarze 621: if (0 == found)
622: enclosed = 1;
1.11 schwarze 623: break;
624: case ('.'):
625: /* FALLTHROUGH */
626: case ('!'):
627: /* FALLTHROUGH */
628: case ('?'):
1.15 schwarze 629: found = 1;
630: break;
1.11 schwarze 631: default:
1.20 schwarze 632: return(found && (!enclosed || isalnum((unsigned char)*q)));
1.11 schwarze 633: }
1.9 schwarze 634: }
635:
1.15 schwarze 636: return(found && !enclosed);
1.12 schwarze 637: }
638:
639: int
640: mandoc_hyph(const char *start, const char *c)
641: {
642:
643: /*
644: * Choose whether to break at a hyphenated character. We only
645: * do this if it's free-standing within a word.
646: */
647:
648: /* Skip first/last character of buffer. */
649: if (c == start || '\0' == *(c + 1))
650: return(0);
651: /* Skip first/last character of word. */
652: if ('\t' == *(c + 1) || '\t' == *(c - 1))
653: return(0);
654: if (' ' == *(c + 1) || ' ' == *(c - 1))
655: return(0);
656: /* Skip double invocations. */
657: if ('-' == *(c + 1) || '-' == *(c - 1))
658: return(0);
659: /* Skip escapes. */
660: if ('\\' == *(c - 1))
661: return(0);
662:
663: return(1);
1.24 schwarze 664: }
665:
666: /*
1.25 schwarze 667: * Find out whether a line is a macro line or not. If it is, adjust the
668: * current position and return one; if it isn't, return zero and don't
669: * change the current position.
1.24 schwarze 670: */
1.25 schwarze 671: int
672: mandoc_getcontrol(const char *cp, int *ppos)
1.24 schwarze 673: {
1.25 schwarze 674: int pos;
1.24 schwarze 675:
1.25 schwarze 676: pos = *ppos;
1.24 schwarze 677:
1.25 schwarze 678: if ('\\' == cp[pos] && '.' == cp[pos + 1])
679: pos += 2;
680: else if ('.' == cp[pos] || '\'' == cp[pos])
681: pos++;
682: else
683: return(0);
1.24 schwarze 684:
1.25 schwarze 685: while (' ' == cp[pos] || '\t' == cp[pos])
686: pos++;
1.24 schwarze 687:
1.25 schwarze 688: *ppos = pos;
689: return(1);
1.9 schwarze 690: }
1.26 ! schwarze 691:
! 692: /*
! 693: * Convert a string to a long that may not be <0.
! 694: * If the string is invalid, or is less than 0, return -1.
! 695: */
! 696: int
! 697: mandoc_strntou(const char *p, size_t sz, int base)
! 698: {
! 699: char buf[32];
! 700: char *ep;
! 701: long v;
! 702:
! 703: if (sz > 31)
! 704: return(-1);
! 705:
! 706: memcpy(buf, p, sz);
! 707: buf[(int)sz] = '\0';
! 708:
! 709: errno = 0;
! 710: v = strtol(buf, &ep, base);
! 711:
! 712: if (buf[0] == '\0' || *ep != '\0')
! 713: return(-1);
! 714:
! 715: if ((errno == ERANGE &&
! 716: (v == LONG_MAX || v == LONG_MIN)) ||
! 717: (v > INT_MAX || v < 0))
! 718: return(-1);
! 719:
! 720: return((int)v);
! 721: }
! 722:
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