Annotation of mandoc/mandoc.c, Revision 1.63
1.63 ! schwarze 1: /* $Id: mandoc.c,v 1.62 2011/12/03 16:08:51 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.63 ! schwarze 4: * Copyright (c) 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: *
1.36 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.36 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1 kristaps 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: */
1.9 kristaps 18: #ifdef HAVE_CONFIG_H
19: #include "config.h"
1.7 kristaps 20: #endif
21:
1.2 kristaps 22: #include <sys/types.h>
23:
1.1 kristaps 24: #include <assert.h>
25: #include <ctype.h>
1.50 kristaps 26: #include <errno.h>
27: #include <limits.h>
1.1 kristaps 28: #include <stdlib.h>
1.4 kristaps 29: #include <stdio.h>
30: #include <string.h>
1.7 kristaps 31: #include <time.h>
1.1 kristaps 32:
1.18 kristaps 33: #include "mandoc.h"
1.1 kristaps 34: #include "libmandoc.h"
35:
1.37 schwarze 36: #define DATESIZE 32
37:
1.18 kristaps 38: static int a2time(time_t *, const char *, const char *);
1.37 schwarze 39: static char *time2a(time_t);
1.45 kristaps 40: static int numescape(const char *);
1.7 kristaps 41:
1.45 kristaps 42: /*
43: * Pass over recursive numerical expressions. This context of this
44: * function is important: it's only called within character-terminating
45: * escapes (e.g., \s[xxxyyy]), so all we need to do is handle initial
46: * recursion: we don't care about what's in these blocks.
47: * This returns the number of characters skipped or -1 if an error
48: * occurs (the caller should bail).
49: */
50: static int
51: numescape(const char *start)
52: {
53: int i;
54: size_t sz;
55: const char *cp;
56:
57: i = 0;
58:
59: /* The expression consists of a subexpression. */
60:
61: if ('\\' == start[i]) {
62: cp = &start[++i];
63: /*
64: * Read past the end of the subexpression.
65: * Bail immediately on errors.
66: */
67: if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
68: return(-1);
69: return(i + cp - &start[i]);
70: }
71:
72: if ('(' != start[i++])
73: return(0);
74:
75: /*
76: * A parenthesised subexpression. Read until the closing
77: * parenthesis, making sure to handle any nested subexpressions
78: * that might ruin our parse.
79: */
80:
81: while (')' != start[i]) {
82: sz = strcspn(&start[i], ")\\");
83: i += (int)sz;
84:
85: if ('\0' == start[i])
86: return(-1);
87: else if ('\\' != start[i])
88: continue;
89:
90: cp = &start[++i];
91: if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
92: return(-1);
93: i += cp - &start[i];
94: }
95:
96: /* Read past the terminating ')'. */
97: return(++i);
98: }
99:
100: enum mandoc_esc
101: mandoc_escape(const char **end, const char **start, int *sz)
1.1 kristaps 102: {
1.45 kristaps 103: char c, term, numeric;
104: int i, lim, ssz, rlim;
105: const char *cp, *rstart;
106: enum mandoc_esc gly;
107:
108: cp = *end;
109: rstart = cp;
110: if (start)
111: *start = rstart;
1.46 kristaps 112: i = lim = 0;
1.45 kristaps 113: gly = ESCAPE_ERROR;
1.46 kristaps 114: term = numeric = '\0';
1.18 kristaps 115:
1.45 kristaps 116: switch ((c = cp[i++])) {
117: /*
118: * First the glyphs. There are several different forms of
119: * these, but each eventually returns a substring of the glyph
120: * name.
121: */
122: case ('('):
123: gly = ESCAPE_SPECIAL;
124: lim = 2;
125: break;
126: case ('['):
127: gly = ESCAPE_SPECIAL;
1.52 kristaps 128: /*
129: * Unicode escapes are defined in groff as \[uXXXX] to
130: * \[u10FFFF], where the contained value must be a valid
131: * Unicode codepoint. Here, however, only check whether
132: * it's not a zero-width escape.
133: */
134: if ('u' == cp[i] && ']' != cp[i + 1])
135: gly = ESCAPE_UNICODE;
1.45 kristaps 136: term = ']';
137: break;
138: case ('C'):
139: if ('\'' != cp[i])
140: return(ESCAPE_ERROR);
141: gly = ESCAPE_SPECIAL;
142: term = '\'';
143: break;
1.63 ! schwarze 144:
! 145: /*
! 146: * The \z escape is supposed to output the following
! 147: * character without advancing the cursor position.
! 148: * Since we are mostly dealing with terminal mode,
! 149: * let us just skip the next character.
! 150: */
! 151: case ('z'):
! 152: (*end)++;
! 153: return(ESCAPE_SKIPCHAR);
1.1 kristaps 154:
1.45 kristaps 155: /*
156: * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
157: * 'X' is the trigger. These have opaque sub-strings.
158: */
159: case ('F'):
160: /* FALLTHROUGH */
161: case ('g'):
1.24 kristaps 162: /* FALLTHROUGH */
1.45 kristaps 163: case ('k'):
1.24 kristaps 164: /* FALLTHROUGH */
1.45 kristaps 165: case ('M'):
1.24 kristaps 166: /* FALLTHROUGH */
1.45 kristaps 167: case ('m'):
1.24 kristaps 168: /* FALLTHROUGH */
1.45 kristaps 169: case ('n'):
1.24 kristaps 170: /* FALLTHROUGH */
1.45 kristaps 171: case ('V'):
1.24 kristaps 172: /* FALLTHROUGH */
1.45 kristaps 173: case ('Y'):
1.60 schwarze 174: gly = ESCAPE_IGNORE;
1.24 kristaps 175: /* FALLTHROUGH */
1.45 kristaps 176: case ('f'):
177: if (ESCAPE_ERROR == gly)
178: gly = ESCAPE_FONT;
179:
180: rstart= &cp[i];
181: if (start)
182: *start = rstart;
183:
184: switch (cp[i++]) {
185: case ('('):
186: lim = 2;
187: break;
188: case ('['):
189: term = ']';
190: break;
191: default:
192: lim = 1;
193: i--;
194: break;
195: }
196: break;
197:
198: /*
199: * These escapes are of the form \X'Y', where 'X' is the trigger
200: * and 'Y' is any string. These have opaque sub-strings.
201: */
202: case ('A'):
1.24 kristaps 203: /* FALLTHROUGH */
1.45 kristaps 204: case ('b'):
1.24 kristaps 205: /* FALLTHROUGH */
206: case ('D'):
207: /* FALLTHROUGH */
1.45 kristaps 208: case ('o'):
1.24 kristaps 209: /* FALLTHROUGH */
1.45 kristaps 210: case ('R'):
1.24 kristaps 211: /* FALLTHROUGH */
1.45 kristaps 212: case ('X'):
1.24 kristaps 213: /* FALLTHROUGH */
1.45 kristaps 214: case ('Z'):
215: if ('\'' != cp[i++])
216: return(ESCAPE_ERROR);
217: gly = ESCAPE_IGNORE;
1.24 kristaps 218: term = '\'';
219: break;
1.45 kristaps 220:
221: /*
222: * These escapes are of the form \X'N', where 'X' is the trigger
223: * and 'N' resolves to a numerical expression.
224: */
225: case ('B'):
226: /* FALLTHROUGH */
1.28 kristaps 227: case ('h'):
228: /* FALLTHROUGH */
1.45 kristaps 229: case ('H'):
230: /* FALLTHROUGH */
231: case ('L'):
232: /* FALLTHROUGH */
233: case ('l'):
1.60 schwarze 234: gly = ESCAPE_NUMBERED;
1.45 kristaps 235: /* FALLTHROUGH */
236: case ('S'):
237: /* FALLTHROUGH */
1.28 kristaps 238: case ('v'):
239: /* FALLTHROUGH */
1.45 kristaps 240: case ('w'):
241: /* FALLTHROUGH */
242: case ('x'):
243: if (ESCAPE_ERROR == gly)
244: gly = ESCAPE_IGNORE;
245: if ('\'' != cp[i++])
246: return(ESCAPE_ERROR);
247: term = numeric = '\'';
248: break;
1.60 schwarze 249:
250: /*
251: * Special handling for the numbered character escape.
252: * XXX Do any other escapes need similar handling?
253: */
254: case ('N'):
255: if ('\0' == cp[i])
256: return(ESCAPE_ERROR);
257: *end = &cp[++i];
258: if (isdigit((unsigned char)cp[i-1]))
259: return(ESCAPE_IGNORE);
260: while (isdigit((unsigned char)**end))
261: (*end)++;
262: if (start)
263: *start = &cp[i];
264: if (sz)
265: *sz = *end - &cp[i];
266: if ('\0' != **end)
267: (*end)++;
268: return(ESCAPE_NUMBERED);
1.45 kristaps 269:
270: /*
271: * Sizes get a special category of their own.
272: */
1.8 kristaps 273: case ('s'):
1.45 kristaps 274: gly = ESCAPE_IGNORE;
1.28 kristaps 275:
1.45 kristaps 276: rstart = &cp[i];
277: if (start)
278: *start = rstart;
279:
280: /* See +/- counts as a sign. */
281: c = cp[i];
282: if ('+' == c || '-' == c || ASCII_HYPH == c)
283: ++i;
1.8 kristaps 284:
1.45 kristaps 285: switch (cp[i++]) {
1.22 kristaps 286: case ('('):
1.45 kristaps 287: lim = 2;
1.22 kristaps 288: break;
289: case ('['):
1.45 kristaps 290: term = numeric = ']';
1.22 kristaps 291: break;
292: case ('\''):
1.45 kristaps 293: term = numeric = '\'';
1.22 kristaps 294: break;
295: default:
1.45 kristaps 296: lim = 1;
297: i--;
1.22 kristaps 298: break;
1.8 kristaps 299: }
300:
1.45 kristaps 301: /* See +/- counts as a sign. */
302: c = cp[i];
303: if ('+' == c || '-' == c || ASCII_HYPH == c)
304: ++i;
305:
306: break;
1.33 kristaps 307:
1.45 kristaps 308: /*
309: * Anything else is assumed to be a glyph.
310: */
311: default:
312: gly = ESCAPE_SPECIAL;
313: lim = 1;
314: i--;
1.22 kristaps 315: break;
1.45 kristaps 316: }
317:
318: assert(ESCAPE_ERROR != gly);
319:
320: rstart = &cp[i];
321: if (start)
322: *start = rstart;
323:
324: /*
325: * If a terminating block has been specified, we need to
326: * handle the case of recursion, which could have their
327: * own terminating blocks that mess up our parse. This, by the
328: * way, means that the "start" and "size" values will be
329: * effectively meaningless.
330: */
331:
332: ssz = 0;
333: if (numeric && -1 == (ssz = numescape(&cp[i])))
334: return(ESCAPE_ERROR);
335:
336: i += ssz;
337: rlim = -1;
338:
339: /*
340: * We have a character terminator. Try to read up to that
341: * character. If we can't (i.e., we hit the nil), then return
342: * an error; if we can, calculate our length, read past the
343: * terminating character, and exit.
344: */
345:
346: if ('\0' != term) {
347: *end = strchr(&cp[i], term);
348: if ('\0' == *end)
349: return(ESCAPE_ERROR);
350:
351: rlim = *end - &cp[i];
352: if (sz)
353: *sz = rlim;
354: (*end)++;
355: goto out;
356: }
357:
358: assert(lim > 0);
359:
360: /*
361: * We have a numeric limit. If the string is shorter than that,
362: * stop and return an error. Else adjust our endpoint, length,
363: * and return the current glyph.
364: */
365:
366: if ((size_t)lim > strlen(&cp[i]))
367: return(ESCAPE_ERROR);
368:
369: rlim = lim;
370: if (sz)
371: *sz = rlim;
372:
373: *end = &cp[i] + lim;
374:
375: out:
376: assert(rlim >= 0 && rstart);
377:
378: /* Run post-processors. */
379:
380: switch (gly) {
381: case (ESCAPE_FONT):
1.61 kristaps 382: /*
383: * Pretend that the constant-width font modes are the
384: * same as the regular font modes.
385: */
386: if (2 == rlim && 'C' == *rstart)
387: rstart++;
388: else if (1 != rlim)
1.45 kristaps 389: break;
1.61 kristaps 390:
1.45 kristaps 391: switch (*rstart) {
392: case ('3'):
393: /* FALLTHROUGH */
394: case ('B'):
395: gly = ESCAPE_FONTBOLD;
396: break;
397: case ('2'):
398: /* FALLTHROUGH */
399: case ('I'):
400: gly = ESCAPE_FONTITALIC;
1.22 kristaps 401: break;
1.45 kristaps 402: case ('P'):
403: gly = ESCAPE_FONTPREV;
1.22 kristaps 404: break;
1.45 kristaps 405: case ('1'):
406: /* FALLTHROUGH */
407: case ('R'):
408: gly = ESCAPE_FONTROMAN;
1.1 kristaps 409: break;
410: }
1.46 kristaps 411: break;
1.45 kristaps 412: case (ESCAPE_SPECIAL):
413: if (1 != rlim)
414: break;
415: if ('c' == *rstart)
416: gly = ESCAPE_NOSPACE;
1.22 kristaps 417: break;
1.1 kristaps 418: default:
1.22 kristaps 419: break;
1.1 kristaps 420: }
421:
1.45 kristaps 422: return(gly);
1.1 kristaps 423: }
1.4 kristaps 424:
425: void *
426: mandoc_calloc(size_t num, size_t size)
427: {
428: void *ptr;
429:
430: ptr = calloc(num, size);
431: if (NULL == ptr) {
1.6 kristaps 432: perror(NULL);
1.35 kristaps 433: exit((int)MANDOCLEVEL_SYSERR);
1.4 kristaps 434: }
435:
436: return(ptr);
437: }
438:
439:
440: void *
441: mandoc_malloc(size_t size)
442: {
443: void *ptr;
444:
445: ptr = malloc(size);
446: if (NULL == ptr) {
1.6 kristaps 447: perror(NULL);
1.35 kristaps 448: exit((int)MANDOCLEVEL_SYSERR);
1.4 kristaps 449: }
450:
451: return(ptr);
452: }
453:
454:
455: void *
456: mandoc_realloc(void *ptr, size_t size)
457: {
458:
459: ptr = realloc(ptr, size);
460: if (NULL == ptr) {
1.6 kristaps 461: perror(NULL);
1.35 kristaps 462: exit((int)MANDOCLEVEL_SYSERR);
1.4 kristaps 463: }
464:
465: return(ptr);
466: }
467:
1.55 kristaps 468: char *
469: mandoc_strndup(const char *ptr, size_t sz)
470: {
471: char *p;
472:
473: p = mandoc_malloc(sz + 1);
474: memcpy(p, ptr, sz);
475: p[(int)sz] = '\0';
476: return(p);
477: }
1.4 kristaps 478:
479: char *
480: mandoc_strdup(const char *ptr)
481: {
482: char *p;
483:
484: p = strdup(ptr);
485: if (NULL == p) {
1.6 kristaps 486: perror(NULL);
1.35 kristaps 487: exit((int)MANDOCLEVEL_SYSERR);
1.4 kristaps 488: }
489:
490: return(p);
1.36 schwarze 491: }
492:
493: /*
494: * Parse a quoted or unquoted roff-style request or macro argument.
495: * Return a pointer to the parsed argument, which is either the original
496: * pointer or advanced by one byte in case the argument is quoted.
497: * Null-terminate the argument in place.
498: * Collapse pairs of quotes inside quoted arguments.
499: * Advance the argument pointer to the next argument,
500: * or to the null byte terminating the argument line.
501: */
502: char *
1.48 kristaps 503: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.36 schwarze 504: {
505: char *start, *cp;
506: int quoted, pairs, white;
507:
508: /* Quoting can only start with a new word. */
509: start = *cpp;
1.47 kristaps 510: quoted = 0;
1.36 schwarze 511: if ('"' == *start) {
512: quoted = 1;
513: start++;
1.47 kristaps 514: }
1.36 schwarze 515:
516: pairs = 0;
517: white = 0;
518: for (cp = start; '\0' != *cp; cp++) {
519: /* Move left after quoted quotes and escaped backslashes. */
520: if (pairs)
521: cp[-pairs] = cp[0];
522: if ('\\' == cp[0]) {
523: if ('\\' == cp[1]) {
524: /* Poor man's copy mode. */
525: pairs++;
526: cp++;
527: } else if (0 == quoted && ' ' == cp[1])
528: /* Skip escaped blanks. */
529: cp++;
530: } else if (0 == quoted) {
531: if (' ' == cp[0]) {
532: /* Unescaped blanks end unquoted args. */
533: white = 1;
534: break;
535: }
536: } else if ('"' == cp[0]) {
537: if ('"' == cp[1]) {
538: /* Quoted quotes collapse. */
539: pairs++;
540: cp++;
541: } else {
542: /* Unquoted quotes end quoted args. */
543: quoted = 2;
544: break;
545: }
546: }
547: }
548:
549: /* Quoted argument without a closing quote. */
1.48 kristaps 550: if (1 == quoted)
1.42 kristaps 551: mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
1.36 schwarze 552:
553: /* Null-terminate this argument and move to the next one. */
554: if (pairs)
555: cp[-pairs] = '\0';
556: if ('\0' != *cp) {
557: *cp++ = '\0';
558: while (' ' == *cp)
559: cp++;
560: }
1.39 kristaps 561: *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.36 schwarze 562: *cpp = cp;
563:
1.48 kristaps 564: if ('\0' == *cp && (white || ' ' == cp[-1]))
1.42 kristaps 565: mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
1.36 schwarze 566:
567: return(start);
1.4 kristaps 568: }
1.7 kristaps 569:
570: static int
571: a2time(time_t *t, const char *fmt, const char *p)
572: {
573: struct tm tm;
574: char *pp;
575:
576: memset(&tm, 0, sizeof(struct tm));
577:
1.56 kristaps 578: pp = NULL;
579: #ifdef HAVE_STRPTIME
1.7 kristaps 580: pp = strptime(p, fmt, &tm);
1.56 kristaps 581: #endif
1.7 kristaps 582: if (NULL != pp && '\0' == *pp) {
583: *t = mktime(&tm);
584: return(1);
585: }
586:
587: return(0);
588: }
589:
1.37 schwarze 590: static char *
591: time2a(time_t t)
592: {
1.56 kristaps 593: struct tm *tm;
1.38 schwarze 594: char *buf, *p;
595: size_t ssz;
1.37 schwarze 596: int isz;
597:
1.56 kristaps 598: tm = localtime(&t);
1.37 schwarze 599:
1.38 schwarze 600: /*
601: * Reserve space:
602: * up to 9 characters for the month (September) + blank
603: * up to 2 characters for the day + comma + blank
604: * 4 characters for the year and a terminating '\0'
605: */
606: p = buf = mandoc_malloc(10 + 4 + 4 + 1);
607:
1.56 kristaps 608: if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
1.38 schwarze 609: goto fail;
610: p += (int)ssz;
1.37 schwarze 611:
1.56 kristaps 612: if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
1.38 schwarze 613: goto fail;
1.37 schwarze 614: p += isz;
615:
1.56 kristaps 616: if (0 == strftime(p, 4 + 1, "%Y", tm))
1.38 schwarze 617: goto fail;
618: return(buf);
619:
620: fail:
621: free(buf);
622: return(NULL);
1.37 schwarze 623: }
624:
625: char *
1.42 kristaps 626: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.7 kristaps 627: {
1.37 schwarze 628: char *out;
1.7 kristaps 629: time_t t;
630:
1.37 schwarze 631: if (NULL == in || '\0' == *in ||
632: 0 == strcmp(in, "$" "Mdocdate$")) {
1.42 kristaps 633: mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
1.37 schwarze 634: time(&t);
635: }
1.62 schwarze 636: else if (a2time(&t, "%Y-%m-%d", in))
637: t = 0;
1.37 schwarze 638: else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
1.62 schwarze 639: !a2time(&t, "%b %d, %Y", in)) {
1.42 kristaps 640: mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
1.37 schwarze 641: t = 0;
1.7 kristaps 642: }
1.37 schwarze 643: out = t ? time2a(t) : NULL;
1.38 schwarze 644: return(out ? out : mandoc_strdup(in));
1.7 kristaps 645: }
646:
1.12 kristaps 647: int
1.23 schwarze 648: mandoc_eos(const char *p, size_t sz, int enclosed)
1.12 kristaps 649: {
1.23 schwarze 650: const char *q;
651: int found;
1.12 kristaps 652:
1.13 kristaps 653: if (0 == sz)
654: return(0);
1.12 kristaps 655:
1.14 kristaps 656: /*
657: * End-of-sentence recognition must include situations where
658: * some symbols, such as `)', allow prior EOS punctuation to
1.49 kristaps 659: * propagate outward.
1.14 kristaps 660: */
661:
1.23 schwarze 662: found = 0;
1.25 kristaps 663: for (q = p + (int)sz - 1; q >= p; q--) {
1.23 schwarze 664: switch (*q) {
1.14 kristaps 665: case ('\"'):
666: /* FALLTHROUGH */
667: case ('\''):
1.15 kristaps 668: /* FALLTHROUGH */
669: case (']'):
1.14 kristaps 670: /* FALLTHROUGH */
671: case (')'):
1.23 schwarze 672: if (0 == found)
673: enclosed = 1;
1.14 kristaps 674: break;
675: case ('.'):
676: /* FALLTHROUGH */
677: case ('!'):
678: /* FALLTHROUGH */
679: case ('?'):
1.23 schwarze 680: found = 1;
681: break;
1.14 kristaps 682: default:
1.27 joerg 683: return(found && (!enclosed || isalnum((unsigned char)*q)));
1.14 kristaps 684: }
1.12 kristaps 685: }
686:
1.23 schwarze 687: return(found && !enclosed);
1.40 kristaps 688: }
689:
1.44 kristaps 690: /*
691: * Find out whether a line is a macro line or not. If it is, adjust the
692: * current position and return one; if it isn't, return zero and don't
693: * change the current position.
694: */
695: int
696: mandoc_getcontrol(const char *cp, int *ppos)
697: {
698: int pos;
699:
700: pos = *ppos;
701:
702: if ('\\' == cp[pos] && '.' == cp[pos + 1])
703: pos += 2;
704: else if ('.' == cp[pos] || '\'' == cp[pos])
705: pos++;
706: else
707: return(0);
708:
709: while (' ' == cp[pos] || '\t' == cp[pos])
710: pos++;
711:
712: *ppos = pos;
713: return(1);
714: }
1.50 kristaps 715:
716: /*
717: * Convert a string to a long that may not be <0.
718: * If the string is invalid, or is less than 0, return -1.
719: */
720: int
1.54 kristaps 721: mandoc_strntoi(const char *p, size_t sz, int base)
1.50 kristaps 722: {
723: char buf[32];
724: char *ep;
725: long v;
726:
727: if (sz > 31)
728: return(-1);
729:
730: memcpy(buf, p, sz);
1.51 kristaps 731: buf[(int)sz] = '\0';
1.50 kristaps 732:
733: errno = 0;
734: v = strtol(buf, &ep, base);
735:
736: if (buf[0] == '\0' || *ep != '\0')
737: return(-1);
738:
1.54 kristaps 739: if (v > INT_MAX)
740: v = INT_MAX;
741: if (v < INT_MIN)
742: v = INT_MIN;
1.50 kristaps 743:
744: return((int)v);
745: }
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