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Annotation of mandoc/mandoc.c, Revision 1.87

1.87    ! schwarze    1: /*     $Id: mandoc.c,v 1.86 2014/08/18 09:11:47 kristaps Exp $ */
1.1       kristaps    2: /*
1.59      schwarze    3:  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.78      schwarze    4:  * Copyright (c) 2011, 2012, 2013, 2014 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: #include "config.h"
1.7       kristaps   19:
1.2       kristaps   20: #include <sys/types.h>
                     21:
1.1       kristaps   22: #include <assert.h>
                     23: #include <ctype.h>
1.50      kristaps   24: #include <errno.h>
                     25: #include <limits.h>
1.1       kristaps   26: #include <stdlib.h>
1.4       kristaps   27: #include <stdio.h>
                     28: #include <string.h>
1.7       kristaps   29: #include <time.h>
1.1       kristaps   30:
1.18      kristaps   31: #include "mandoc.h"
1.76      schwarze   32: #include "mandoc_aux.h"
1.1       kristaps   33: #include "libmandoc.h"
                     34:
1.37      schwarze   35: #define DATESIZE 32
                     36:
1.18      kristaps   37: static int      a2time(time_t *, const char *, const char *);
1.37      schwarze   38: static char    *time2a(time_t);
1.7       kristaps   39:
1.45      kristaps   40:
                     41: enum mandoc_esc
1.74      schwarze   42: mandoc_escape(const char **end, const char **start, int *sz)
1.1       kristaps   43: {
1.65      schwarze   44:        const char      *local_start;
                     45:        int              local_sz;
                     46:        char             term;
1.79      schwarze   47:        enum mandoc_esc  gly;
1.45      kristaps   48:
1.65      schwarze   49:        /*
                     50:         * When the caller doesn't provide return storage,
                     51:         * use local storage.
                     52:         */
                     53:
                     54:        if (NULL == start)
                     55:                start = &local_start;
                     56:        if (NULL == sz)
                     57:                sz = &local_sz;
                     58:
                     59:        /*
                     60:         * Beyond the backslash, at least one input character
                     61:         * is part of the escape sequence.  With one exception
                     62:         * (see below), that character won't be returned.
                     63:         */
                     64:
1.45      kristaps   65:        gly = ESCAPE_ERROR;
1.65      schwarze   66:        *start = ++*end;
                     67:        *sz = 0;
1.64      schwarze   68:        term = '\0';
1.18      kristaps   69:
1.65      schwarze   70:        switch ((*start)[-1]) {
1.45      kristaps   71:        /*
                     72:         * First the glyphs.  There are several different forms of
                     73:         * these, but each eventually returns a substring of the glyph
                     74:         * name.
                     75:         */
1.79      schwarze   76:        case '(':
1.45      kristaps   77:                gly = ESCAPE_SPECIAL;
1.65      schwarze   78:                *sz = 2;
1.45      kristaps   79:                break;
1.79      schwarze   80:        case '[':
1.45      kristaps   81:                gly = ESCAPE_SPECIAL;
                     82:                term = ']';
                     83:                break;
1.79      schwarze   84:        case 'C':
1.65      schwarze   85:                if ('\'' != **start)
1.45      kristaps   86:                        return(ESCAPE_ERROR);
1.65      schwarze   87:                *start = ++*end;
1.87    ! schwarze   88:                gly = ESCAPE_SPECIAL;
1.45      kristaps   89:                term = '\'';
                     90:                break;
1.72      schwarze   91:
                     92:        /*
                     93:         * Escapes taking no arguments at all.
                     94:         */
1.79      schwarze   95:        case 'd':
1.72      schwarze   96:                /* FALLTHROUGH */
1.79      schwarze   97:        case 'u':
1.72      schwarze   98:                return(ESCAPE_IGNORE);
1.63      schwarze   99:
                    100:        /*
                    101:         * The \z escape is supposed to output the following
1.79      schwarze  102:         * character without advancing the cursor position.
1.63      schwarze  103:         * Since we are mostly dealing with terminal mode,
                    104:         * let us just skip the next character.
                    105:         */
1.79      schwarze  106:        case 'z':
1.63      schwarze  107:                return(ESCAPE_SKIPCHAR);
1.1       kristaps  108:
1.45      kristaps  109:        /*
                    110:         * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
                    111:         * 'X' is the trigger.  These have opaque sub-strings.
                    112:         */
1.79      schwarze  113:        case 'F':
1.45      kristaps  114:                /* FALLTHROUGH */
1.79      schwarze  115:        case 'g':
1.24      kristaps  116:                /* FALLTHROUGH */
1.79      schwarze  117:        case 'k':
1.24      kristaps  118:                /* FALLTHROUGH */
1.79      schwarze  119:        case 'M':
1.24      kristaps  120:                /* FALLTHROUGH */
1.79      schwarze  121:        case 'm':
1.24      kristaps  122:                /* FALLTHROUGH */
1.79      schwarze  123:        case 'n':
1.24      kristaps  124:                /* FALLTHROUGH */
1.79      schwarze  125:        case 'V':
1.24      kristaps  126:                /* FALLTHROUGH */
1.79      schwarze  127:        case 'Y':
1.60      schwarze  128:                gly = ESCAPE_IGNORE;
1.24      kristaps  129:                /* FALLTHROUGH */
1.79      schwarze  130:        case 'f':
1.45      kristaps  131:                if (ESCAPE_ERROR == gly)
                    132:                        gly = ESCAPE_FONT;
1.65      schwarze  133:                switch (**start) {
1.79      schwarze  134:                case '(':
1.65      schwarze  135:                        *start = ++*end;
                    136:                        *sz = 2;
1.45      kristaps  137:                        break;
1.79      schwarze  138:                case '[':
1.65      schwarze  139:                        *start = ++*end;
1.45      kristaps  140:                        term = ']';
                    141:                        break;
                    142:                default:
1.65      schwarze  143:                        *sz = 1;
1.45      kristaps  144:                        break;
                    145:                }
                    146:                break;
                    147:
                    148:        /*
                    149:         * These escapes are of the form \X'Y', where 'X' is the trigger
                    150:         * and 'Y' is any string.  These have opaque sub-strings.
1.78      schwarze  151:         * The \B and \w escapes are handled in roff.c, roff_res().
1.45      kristaps  152:         */
1.79      schwarze  153:        case 'A':
1.24      kristaps  154:                /* FALLTHROUGH */
1.79      schwarze  155:        case 'b':
1.24      kristaps  156:                /* FALLTHROUGH */
1.79      schwarze  157:        case 'D':
1.24      kristaps  158:                /* FALLTHROUGH */
1.79      schwarze  159:        case 'o':
1.24      kristaps  160:                /* FALLTHROUGH */
1.79      schwarze  161:        case 'R':
1.73      schwarze  162:                /* FALLTHROUGH */
1.79      schwarze  163:        case 'X':
1.24      kristaps  164:                /* FALLTHROUGH */
1.79      schwarze  165:        case 'Z':
1.77      schwarze  166:                if ('\0' == **start)
1.45      kristaps  167:                        return(ESCAPE_ERROR);
                    168:                gly = ESCAPE_IGNORE;
1.77      schwarze  169:                term = **start;
1.65      schwarze  170:                *start = ++*end;
1.24      kristaps  171:                break;
1.45      kristaps  172:
                    173:        /*
                    174:         * These escapes are of the form \X'N', where 'X' is the trigger
                    175:         * and 'N' resolves to a numerical expression.
                    176:         */
1.79      schwarze  177:        case 'h':
1.28      kristaps  178:                /* FALLTHROUGH */
1.79      schwarze  179:        case 'H':
1.45      kristaps  180:                /* FALLTHROUGH */
1.79      schwarze  181:        case 'L':
1.45      kristaps  182:                /* FALLTHROUGH */
1.79      schwarze  183:        case 'l':
1.45      kristaps  184:                /* FALLTHROUGH */
1.79      schwarze  185:        case 'S':
1.45      kristaps  186:                /* FALLTHROUGH */
1.79      schwarze  187:        case 'v':
1.28      kristaps  188:                /* FALLTHROUGH */
1.79      schwarze  189:        case 'x':
1.82      schwarze  190:                if (strchr(" %&()*+-./0123456789:<=>", **start)) {
1.86      kristaps  191:                        if ('\0' != **start)
                    192:                                ++*end;
1.65      schwarze  193:                        return(ESCAPE_ERROR);
1.82      schwarze  194:                }
1.73      schwarze  195:                gly = ESCAPE_IGNORE;
1.77      schwarze  196:                term = **start;
1.65      schwarze  197:                *start = ++*end;
1.45      kristaps  198:                break;
1.60      schwarze  199:
                    200:        /*
                    201:         * Special handling for the numbered character escape.
                    202:         * XXX Do any other escapes need similar handling?
                    203:         */
1.79      schwarze  204:        case 'N':
1.65      schwarze  205:                if ('\0' == **start)
1.60      schwarze  206:                        return(ESCAPE_ERROR);
1.65      schwarze  207:                (*end)++;
                    208:                if (isdigit((unsigned char)**start)) {
                    209:                        *sz = 1;
1.60      schwarze  210:                        return(ESCAPE_IGNORE);
1.65      schwarze  211:                }
                    212:                (*start)++;
1.60      schwarze  213:                while (isdigit((unsigned char)**end))
                    214:                        (*end)++;
1.65      schwarze  215:                *sz = *end - *start;
1.60      schwarze  216:                if ('\0' != **end)
                    217:                        (*end)++;
                    218:                return(ESCAPE_NUMBERED);
1.45      kristaps  219:
1.79      schwarze  220:        /*
1.45      kristaps  221:         * Sizes get a special category of their own.
                    222:         */
1.79      schwarze  223:        case 's':
1.45      kristaps  224:                gly = ESCAPE_IGNORE;
1.28      kristaps  225:
1.45      kristaps  226:                /* See +/- counts as a sign. */
1.65      schwarze  227:                if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
                    228:                        (*end)++;
1.8       kristaps  229:
1.65      schwarze  230:                switch (**end) {
1.79      schwarze  231:                case '(':
1.65      schwarze  232:                        *start = ++*end;
                    233:                        *sz = 2;
1.22      kristaps  234:                        break;
1.79      schwarze  235:                case '[':
1.65      schwarze  236:                        *start = ++*end;
1.64      schwarze  237:                        term = ']';
1.22      kristaps  238:                        break;
1.79      schwarze  239:                case '\'':
1.65      schwarze  240:                        *start = ++*end;
1.64      schwarze  241:                        term = '\'';
1.22      kristaps  242:                        break;
                    243:                default:
1.65      schwarze  244:                        *sz = 1;
1.22      kristaps  245:                        break;
1.8       kristaps  246:                }
                    247:
1.45      kristaps  248:                break;
1.33      kristaps  249:
1.45      kristaps  250:        /*
                    251:         * Anything else is assumed to be a glyph.
1.65      schwarze  252:         * In this case, pass back the character after the backslash.
1.45      kristaps  253:         */
                    254:        default:
                    255:                gly = ESCAPE_SPECIAL;
1.65      schwarze  256:                *start = --*end;
                    257:                *sz = 1;
1.22      kristaps  258:                break;
1.45      kristaps  259:        }
                    260:
                    261:        assert(ESCAPE_ERROR != gly);
                    262:
                    263:        /*
1.64      schwarze  264:         * Read up to the terminating character,
                    265:         * paying attention to nested escapes.
1.45      kristaps  266:         */
                    267:
                    268:        if ('\0' != term) {
1.64      schwarze  269:                while (**end != term) {
                    270:                        switch (**end) {
1.79      schwarze  271:                        case '\0':
1.64      schwarze  272:                                return(ESCAPE_ERROR);
1.79      schwarze  273:                        case '\\':
1.64      schwarze  274:                                (*end)++;
                    275:                                if (ESCAPE_ERROR ==
                    276:                                    mandoc_escape(end, NULL, NULL))
                    277:                                        return(ESCAPE_ERROR);
                    278:                                break;
                    279:                        default:
                    280:                                (*end)++;
                    281:                                break;
                    282:                        }
                    283:                }
1.65      schwarze  284:                *sz = (*end)++ - *start;
1.64      schwarze  285:        } else {
1.65      schwarze  286:                assert(*sz > 0);
                    287:                if ((size_t)*sz > strlen(*start))
1.45      kristaps  288:                        return(ESCAPE_ERROR);
1.65      schwarze  289:                *end += *sz;
1.45      kristaps  290:        }
                    291:
                    292:        /* Run post-processors. */
                    293:
                    294:        switch (gly) {
1.79      schwarze  295:        case ESCAPE_FONT:
1.68      schwarze  296:                if (2 == *sz) {
                    297:                        if ('C' == **start) {
                    298:                                /*
                    299:                                 * Treat constant-width font modes
                    300:                                 * just like regular font modes.
                    301:                                 */
                    302:                                (*start)++;
                    303:                                (*sz)--;
                    304:                        } else {
                    305:                                if ('B' == (*start)[0] && 'I' == (*start)[1])
                    306:                                        gly = ESCAPE_FONTBI;
                    307:                                break;
                    308:                        }
1.65      schwarze  309:                } else if (1 != *sz)
1.45      kristaps  310:                        break;
1.61      kristaps  311:
1.65      schwarze  312:                switch (**start) {
1.79      schwarze  313:                case '3':
1.45      kristaps  314:                        /* FALLTHROUGH */
1.79      schwarze  315:                case 'B':
1.45      kristaps  316:                        gly = ESCAPE_FONTBOLD;
                    317:                        break;
1.79      schwarze  318:                case '2':
1.45      kristaps  319:                        /* FALLTHROUGH */
1.79      schwarze  320:                case 'I':
1.45      kristaps  321:                        gly = ESCAPE_FONTITALIC;
1.22      kristaps  322:                        break;
1.79      schwarze  323:                case 'P':
1.45      kristaps  324:                        gly = ESCAPE_FONTPREV;
1.22      kristaps  325:                        break;
1.79      schwarze  326:                case '1':
1.45      kristaps  327:                        /* FALLTHROUGH */
1.79      schwarze  328:                case 'R':
1.45      kristaps  329:                        gly = ESCAPE_FONTROMAN;
1.1       kristaps  330:                        break;
                    331:                }
1.46      kristaps  332:                break;
1.79      schwarze  333:        case ESCAPE_SPECIAL:
1.65      schwarze  334:                if (1 == *sz && 'c' == **start)
1.45      kristaps  335:                        gly = ESCAPE_NOSPACE;
1.87    ! schwarze  336:                /*
        !           337:                 * Unicode escapes are defined in groff as \[uXXXX]
        !           338:                 * to \[u10FFFF], where the contained value must be
        !           339:                 * a valid Unicode codepoint.  Here, however, only
        !           340:                 * check the length and the validity of all digits.
        !           341:                 */
        !           342:                else if (*sz > 4 && *sz < 8 && **start == 'u' &&
        !           343:                    (int)strspn(*start + 1, "0123456789ABCDEFabcdef")
        !           344:                    + 1 == *sz)
        !           345:                        gly = ESCAPE_UNICODE;
1.22      kristaps  346:                break;
1.1       kristaps  347:        default:
1.22      kristaps  348:                break;
1.1       kristaps  349:        }
                    350:
1.45      kristaps  351:        return(gly);
1.36      schwarze  352: }
                    353:
                    354: /*
                    355:  * Parse a quoted or unquoted roff-style request or macro argument.
                    356:  * Return a pointer to the parsed argument, which is either the original
                    357:  * pointer or advanced by one byte in case the argument is quoted.
1.71      schwarze  358:  * NUL-terminate the argument in place.
1.36      schwarze  359:  * Collapse pairs of quotes inside quoted arguments.
                    360:  * Advance the argument pointer to the next argument,
1.71      schwarze  361:  * or to the NUL byte terminating the argument line.
1.36      schwarze  362:  */
                    363: char *
1.48      kristaps  364: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.36      schwarze  365: {
                    366:        char     *start, *cp;
                    367:        int       quoted, pairs, white;
                    368:
                    369:        /* Quoting can only start with a new word. */
                    370:        start = *cpp;
1.47      kristaps  371:        quoted = 0;
1.36      schwarze  372:        if ('"' == *start) {
                    373:                quoted = 1;
                    374:                start++;
1.79      schwarze  375:        }
1.36      schwarze  376:
                    377:        pairs = 0;
                    378:        white = 0;
                    379:        for (cp = start; '\0' != *cp; cp++) {
1.67      schwarze  380:
                    381:                /*
                    382:                 * Move the following text left
                    383:                 * after quoted quotes and after "\\" and "\t".
                    384:                 */
1.36      schwarze  385:                if (pairs)
                    386:                        cp[-pairs] = cp[0];
1.67      schwarze  387:
1.36      schwarze  388:                if ('\\' == cp[0]) {
1.67      schwarze  389:                        /*
                    390:                         * In copy mode, translate double to single
                    391:                         * backslashes and backslash-t to literal tabs.
                    392:                         */
                    393:                        switch (cp[1]) {
1.79      schwarze  394:                        case 't':
1.67      schwarze  395:                                cp[0] = '\t';
                    396:                                /* FALLTHROUGH */
1.79      schwarze  397:                        case '\\':
1.36      schwarze  398:                                pairs++;
                    399:                                cp++;
1.67      schwarze  400:                                break;
1.79      schwarze  401:                        case ' ':
1.36      schwarze  402:                                /* Skip escaped blanks. */
1.67      schwarze  403:                                if (0 == quoted)
                    404:                                        cp++;
                    405:                                break;
                    406:                        default:
                    407:                                break;
                    408:                        }
1.36      schwarze  409:                } else if (0 == quoted) {
                    410:                        if (' ' == cp[0]) {
                    411:                                /* Unescaped blanks end unquoted args. */
                    412:                                white = 1;
                    413:                                break;
                    414:                        }
                    415:                } else if ('"' == cp[0]) {
                    416:                        if ('"' == cp[1]) {
                    417:                                /* Quoted quotes collapse. */
                    418:                                pairs++;
                    419:                                cp++;
                    420:                        } else {
                    421:                                /* Unquoted quotes end quoted args. */
                    422:                                quoted = 2;
                    423:                                break;
                    424:                        }
                    425:                }
                    426:        }
                    427:
                    428:        /* Quoted argument without a closing quote. */
1.48      kristaps  429:        if (1 == quoted)
1.83      schwarze  430:                mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
1.36      schwarze  431:
1.71      schwarze  432:        /* NUL-terminate this argument and move to the next one. */
1.36      schwarze  433:        if (pairs)
                    434:                cp[-pairs] = '\0';
                    435:        if ('\0' != *cp) {
                    436:                *cp++ = '\0';
                    437:                while (' ' == *cp)
                    438:                        cp++;
                    439:        }
1.39      kristaps  440:        *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.36      schwarze  441:        *cpp = cp;
                    442:
1.48      kristaps  443:        if ('\0' == *cp && (white || ' ' == cp[-1]))
1.83      schwarze  444:                mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
1.36      schwarze  445:
                    446:        return(start);
1.4       kristaps  447: }
1.7       kristaps  448:
                    449: static int
                    450: a2time(time_t *t, const char *fmt, const char *p)
                    451: {
                    452:        struct tm        tm;
                    453:        char            *pp;
                    454:
                    455:        memset(&tm, 0, sizeof(struct tm));
                    456:
1.56      kristaps  457:        pp = NULL;
1.85      schwarze  458: #if HAVE_STRPTIME
1.7       kristaps  459:        pp = strptime(p, fmt, &tm);
1.56      kristaps  460: #endif
1.7       kristaps  461:        if (NULL != pp && '\0' == *pp) {
                    462:                *t = mktime(&tm);
                    463:                return(1);
                    464:        }
                    465:
                    466:        return(0);
                    467: }
                    468:
1.37      schwarze  469: static char *
                    470: time2a(time_t t)
                    471: {
1.56      kristaps  472:        struct tm       *tm;
1.38      schwarze  473:        char            *buf, *p;
                    474:        size_t           ssz;
1.37      schwarze  475:        int              isz;
                    476:
1.56      kristaps  477:        tm = localtime(&t);
1.37      schwarze  478:
1.38      schwarze  479:        /*
                    480:         * Reserve space:
                    481:         * up to 9 characters for the month (September) + blank
                    482:         * up to 2 characters for the day + comma + blank
                    483:         * 4 characters for the year and a terminating '\0'
                    484:         */
                    485:        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
                    486:
1.56      kristaps  487:        if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
1.38      schwarze  488:                goto fail;
                    489:        p += (int)ssz;
1.37      schwarze  490:
1.56      kristaps  491:        if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
1.38      schwarze  492:                goto fail;
1.37      schwarze  493:        p += isz;
                    494:
1.56      kristaps  495:        if (0 == strftime(p, 4 + 1, "%Y", tm))
1.38      schwarze  496:                goto fail;
                    497:        return(buf);
                    498:
                    499: fail:
                    500:        free(buf);
                    501:        return(NULL);
1.37      schwarze  502: }
                    503:
                    504: char *
1.42      kristaps  505: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.7       kristaps  506: {
1.37      schwarze  507:        char            *out;
1.7       kristaps  508:        time_t           t;
                    509:
1.37      schwarze  510:        if (NULL == in || '\0' == *in ||
                    511:            0 == strcmp(in, "$" "Mdocdate$")) {
1.80      schwarze  512:                mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
1.37      schwarze  513:                time(&t);
                    514:        }
1.62      schwarze  515:        else if (a2time(&t, "%Y-%m-%d", in))
                    516:                t = 0;
1.37      schwarze  517:        else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
1.62      schwarze  518:            !a2time(&t, "%b %d, %Y", in)) {
1.81      schwarze  519:                mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
1.37      schwarze  520:                t = 0;
1.7       kristaps  521:        }
1.37      schwarze  522:        out = t ? time2a(t) : NULL;
1.38      schwarze  523:        return(out ? out : mandoc_strdup(in));
1.7       kristaps  524: }
                    525:
1.12      kristaps  526: int
1.75      schwarze  527: mandoc_eos(const char *p, size_t sz)
1.12      kristaps  528: {
1.75      schwarze  529:        const char      *q;
                    530:        int              enclosed, found;
1.12      kristaps  531:
1.13      kristaps  532:        if (0 == sz)
                    533:                return(0);
1.12      kristaps  534:
1.14      kristaps  535:        /*
                    536:         * End-of-sentence recognition must include situations where
                    537:         * some symbols, such as `)', allow prior EOS punctuation to
1.49      kristaps  538:         * propagate outward.
1.14      kristaps  539:         */
                    540:
1.75      schwarze  541:        enclosed = found = 0;
1.25      kristaps  542:        for (q = p + (int)sz - 1; q >= p; q--) {
1.23      schwarze  543:                switch (*q) {
1.79      schwarze  544:                case '\"':
1.14      kristaps  545:                        /* FALLTHROUGH */
1.79      schwarze  546:                case '\'':
1.15      kristaps  547:                        /* FALLTHROUGH */
1.79      schwarze  548:                case ']':
1.14      kristaps  549:                        /* FALLTHROUGH */
1.79      schwarze  550:                case ')':
1.23      schwarze  551:                        if (0 == found)
                    552:                                enclosed = 1;
1.14      kristaps  553:                        break;
1.79      schwarze  554:                case '.':
1.14      kristaps  555:                        /* FALLTHROUGH */
1.79      schwarze  556:                case '!':
1.14      kristaps  557:                        /* FALLTHROUGH */
1.79      schwarze  558:                case '?':
1.23      schwarze  559:                        found = 1;
                    560:                        break;
1.14      kristaps  561:                default:
1.27      joerg     562:                        return(found && (!enclosed || isalnum((unsigned char)*q)));
1.14      kristaps  563:                }
1.12      kristaps  564:        }
                    565:
1.23      schwarze  566:        return(found && !enclosed);
1.44      kristaps  567: }
1.50      kristaps  568:
                    569: /*
                    570:  * Convert a string to a long that may not be <0.
                    571:  * If the string is invalid, or is less than 0, return -1.
                    572:  */
                    573: int
1.54      kristaps  574: mandoc_strntoi(const char *p, size_t sz, int base)
1.50      kristaps  575: {
                    576:        char             buf[32];
                    577:        char            *ep;
                    578:        long             v;
                    579:
                    580:        if (sz > 31)
                    581:                return(-1);
                    582:
                    583:        memcpy(buf, p, sz);
1.51      kristaps  584:        buf[(int)sz] = '\0';
1.50      kristaps  585:
                    586:        errno = 0;
                    587:        v = strtol(buf, &ep, base);
                    588:
                    589:        if (buf[0] == '\0' || *ep != '\0')
                    590:                return(-1);
                    591:
1.54      kristaps  592:        if (v > INT_MAX)
                    593:                v = INT_MAX;
                    594:        if (v < INT_MIN)
                    595:                v = INT_MIN;
1.50      kristaps  596:
                    597:        return((int)v);
                    598: }

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