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Annotation of mandoc/mandoc.c, Revision 1.64

1.64    ! schwarze    1: /*     $Id: mandoc.c,v 1.63 2012/05/31 22:29:13 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);
1.7       kristaps   40:
1.45      kristaps   41:
                     42: enum mandoc_esc
                     43: mandoc_escape(const char **end, const char **start, int *sz)
1.1       kristaps   44: {
1.64    ! schwarze   45:        char             c, term;
        !            46:        int              i, rlim;
1.45      kristaps   47:        const char      *cp, *rstart;
                     48:        enum mandoc_esc  gly;
                     49:
                     50:        cp = *end;
                     51:        rstart = cp;
                     52:        if (start)
                     53:                *start = rstart;
1.64    ! schwarze   54:        i = rlim = 0;
1.45      kristaps   55:        gly = ESCAPE_ERROR;
1.64    ! schwarze   56:        term = '\0';
1.18      kristaps   57:
1.45      kristaps   58:        switch ((c = cp[i++])) {
                     59:        /*
                     60:         * First the glyphs.  There are several different forms of
                     61:         * these, but each eventually returns a substring of the glyph
                     62:         * name.
                     63:         */
                     64:        case ('('):
                     65:                gly = ESCAPE_SPECIAL;
1.64    ! schwarze   66:                rlim = 2;
1.45      kristaps   67:                break;
                     68:        case ('['):
                     69:                gly = ESCAPE_SPECIAL;
1.52      kristaps   70:                /*
                     71:                 * Unicode escapes are defined in groff as \[uXXXX] to
                     72:                 * \[u10FFFF], where the contained value must be a valid
                     73:                 * Unicode codepoint.  Here, however, only check whether
                     74:                 * it's not a zero-width escape.
                     75:                 */
                     76:                if ('u' == cp[i] && ']' != cp[i + 1])
                     77:                        gly = ESCAPE_UNICODE;
1.45      kristaps   78:                term = ']';
                     79:                break;
                     80:        case ('C'):
                     81:                if ('\'' != cp[i])
                     82:                        return(ESCAPE_ERROR);
                     83:                gly = ESCAPE_SPECIAL;
                     84:                term = '\'';
                     85:                break;
1.63      schwarze   86:
                     87:        /*
                     88:         * The \z escape is supposed to output the following
                     89:         * character without advancing the cursor position.
                     90:         * Since we are mostly dealing with terminal mode,
                     91:         * let us just skip the next character.
                     92:         */
                     93:        case ('z'):
                     94:                (*end)++;
                     95:                return(ESCAPE_SKIPCHAR);
1.1       kristaps   96:
1.45      kristaps   97:        /*
                     98:         * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
                     99:         * 'X' is the trigger.  These have opaque sub-strings.
                    100:         */
                    101:        case ('F'):
                    102:                /* FALLTHROUGH */
                    103:        case ('g'):
1.24      kristaps  104:                /* FALLTHROUGH */
1.45      kristaps  105:        case ('k'):
1.24      kristaps  106:                /* FALLTHROUGH */
1.45      kristaps  107:        case ('M'):
1.24      kristaps  108:                /* FALLTHROUGH */
1.45      kristaps  109:        case ('m'):
1.24      kristaps  110:                /* FALLTHROUGH */
1.45      kristaps  111:        case ('n'):
1.24      kristaps  112:                /* FALLTHROUGH */
1.45      kristaps  113:        case ('V'):
1.24      kristaps  114:                /* FALLTHROUGH */
1.45      kristaps  115:        case ('Y'):
1.60      schwarze  116:                gly = ESCAPE_IGNORE;
1.24      kristaps  117:                /* FALLTHROUGH */
1.45      kristaps  118:        case ('f'):
                    119:                if (ESCAPE_ERROR == gly)
                    120:                        gly = ESCAPE_FONT;
                    121:
                    122:                rstart= &cp[i];
                    123:                if (start)
                    124:                        *start = rstart;
                    125:
                    126:                switch (cp[i++]) {
                    127:                case ('('):
1.64    ! schwarze  128:                        rlim = 2;
1.45      kristaps  129:                        break;
                    130:                case ('['):
                    131:                        term = ']';
                    132:                        break;
                    133:                default:
1.64    ! schwarze  134:                        rlim = 1;
1.45      kristaps  135:                        i--;
                    136:                        break;
                    137:                }
                    138:                break;
                    139:
                    140:        /*
                    141:         * These escapes are of the form \X'Y', where 'X' is the trigger
                    142:         * and 'Y' is any string.  These have opaque sub-strings.
                    143:         */
                    144:        case ('A'):
1.24      kristaps  145:                /* FALLTHROUGH */
1.45      kristaps  146:        case ('b'):
1.24      kristaps  147:                /* FALLTHROUGH */
                    148:        case ('D'):
                    149:                /* FALLTHROUGH */
1.45      kristaps  150:        case ('o'):
1.24      kristaps  151:                /* FALLTHROUGH */
1.45      kristaps  152:        case ('R'):
1.24      kristaps  153:                /* FALLTHROUGH */
1.45      kristaps  154:        case ('X'):
1.24      kristaps  155:                /* FALLTHROUGH */
1.45      kristaps  156:        case ('Z'):
                    157:                if ('\'' != cp[i++])
                    158:                        return(ESCAPE_ERROR);
                    159:                gly = ESCAPE_IGNORE;
1.24      kristaps  160:                term = '\'';
                    161:                break;
1.45      kristaps  162:
                    163:        /*
                    164:         * These escapes are of the form \X'N', where 'X' is the trigger
                    165:         * and 'N' resolves to a numerical expression.
                    166:         */
                    167:        case ('B'):
                    168:                /* FALLTHROUGH */
1.28      kristaps  169:        case ('h'):
                    170:                /* FALLTHROUGH */
1.45      kristaps  171:        case ('H'):
                    172:                /* FALLTHROUGH */
                    173:        case ('L'):
                    174:                /* FALLTHROUGH */
                    175:        case ('l'):
1.60      schwarze  176:                gly = ESCAPE_NUMBERED;
1.45      kristaps  177:                /* FALLTHROUGH */
                    178:        case ('S'):
                    179:                /* FALLTHROUGH */
1.28      kristaps  180:        case ('v'):
                    181:                /* FALLTHROUGH */
1.45      kristaps  182:        case ('w'):
                    183:                /* FALLTHROUGH */
                    184:        case ('x'):
                    185:                if (ESCAPE_ERROR == gly)
                    186:                        gly = ESCAPE_IGNORE;
                    187:                if ('\'' != cp[i++])
                    188:                        return(ESCAPE_ERROR);
1.64    ! schwarze  189:                term = '\'';
1.45      kristaps  190:                break;
1.60      schwarze  191:
                    192:        /*
                    193:         * Special handling for the numbered character escape.
                    194:         * XXX Do any other escapes need similar handling?
                    195:         */
                    196:        case ('N'):
                    197:                if ('\0' == cp[i])
                    198:                        return(ESCAPE_ERROR);
                    199:                *end = &cp[++i];
                    200:                if (isdigit((unsigned char)cp[i-1]))
                    201:                        return(ESCAPE_IGNORE);
                    202:                while (isdigit((unsigned char)**end))
                    203:                        (*end)++;
                    204:                if (start)
                    205:                        *start = &cp[i];
                    206:                if (sz)
                    207:                        *sz = *end - &cp[i];
                    208:                if ('\0' != **end)
                    209:                        (*end)++;
                    210:                return(ESCAPE_NUMBERED);
1.45      kristaps  211:
                    212:        /*
                    213:         * Sizes get a special category of their own.
                    214:         */
1.8       kristaps  215:        case ('s'):
1.45      kristaps  216:                gly = ESCAPE_IGNORE;
1.28      kristaps  217:
1.45      kristaps  218:                rstart = &cp[i];
                    219:                if (start)
                    220:                        *start = rstart;
                    221:
                    222:                /* See +/- counts as a sign. */
                    223:                c = cp[i];
                    224:                if ('+' == c || '-' == c || ASCII_HYPH == c)
                    225:                        ++i;
1.8       kristaps  226:
1.45      kristaps  227:                switch (cp[i++]) {
1.22      kristaps  228:                case ('('):
1.64    ! schwarze  229:                        rlim = 2;
1.22      kristaps  230:                        break;
                    231:                case ('['):
1.64    ! schwarze  232:                        term = ']';
1.22      kristaps  233:                        break;
                    234:                case ('\''):
1.64    ! schwarze  235:                        term = '\'';
1.22      kristaps  236:                        break;
                    237:                default:
1.64    ! schwarze  238:                        rlim = 1;
1.45      kristaps  239:                        i--;
1.22      kristaps  240:                        break;
1.8       kristaps  241:                }
                    242:
1.45      kristaps  243:                /* See +/- counts as a sign. */
                    244:                c = cp[i];
                    245:                if ('+' == c || '-' == c || ASCII_HYPH == c)
                    246:                        ++i;
                    247:
                    248:                break;
1.33      kristaps  249:
1.45      kristaps  250:        /*
                    251:         * Anything else is assumed to be a glyph.
                    252:         */
                    253:        default:
                    254:                gly = ESCAPE_SPECIAL;
1.64    ! schwarze  255:                rlim = 1;
1.45      kristaps  256:                i--;
1.22      kristaps  257:                break;
1.45      kristaps  258:        }
                    259:
                    260:        assert(ESCAPE_ERROR != gly);
                    261:
1.64    ! schwarze  262:        *end = rstart = &cp[i];
1.45      kristaps  263:        if (start)
                    264:                *start = rstart;
                    265:
                    266:        /*
1.64    ! schwarze  267:         * Read up to the terminating character,
        !           268:         * paying attention to nested escapes.
1.45      kristaps  269:         */
                    270:
                    271:        if ('\0' != term) {
1.64    ! schwarze  272:                while (**end != term) {
        !           273:                        switch (**end) {
        !           274:                        case ('\0'):
        !           275:                                return(ESCAPE_ERROR);
        !           276:                        case ('\\'):
        !           277:                                (*end)++;
        !           278:                                if (ESCAPE_ERROR ==
        !           279:                                    mandoc_escape(end, NULL, NULL))
        !           280:                                        return(ESCAPE_ERROR);
        !           281:                                break;
        !           282:                        default:
        !           283:                                (*end)++;
        !           284:                                break;
        !           285:                        }
        !           286:                }
        !           287:                rlim = (*end)++ - rstart;
        !           288:        } else {
        !           289:                assert(rlim > 0);
        !           290:                if ((size_t)rlim > strlen(rstart))
1.45      kristaps  291:                        return(ESCAPE_ERROR);
1.64    ! schwarze  292:                *end += rlim;
1.45      kristaps  293:        }
                    294:        if (sz)
                    295:                *sz = rlim;
                    296:
                    297:        /* Run post-processors. */
                    298:
                    299:        switch (gly) {
                    300:        case (ESCAPE_FONT):
1.61      kristaps  301:                /*
                    302:                 * Pretend that the constant-width font modes are the
                    303:                 * same as the regular font modes.
                    304:                 */
                    305:                if (2 == rlim && 'C' == *rstart)
                    306:                        rstart++;
                    307:                else if (1 != rlim)
1.45      kristaps  308:                        break;
1.61      kristaps  309:
1.45      kristaps  310:                switch (*rstart) {
                    311:                case ('3'):
                    312:                        /* FALLTHROUGH */
                    313:                case ('B'):
                    314:                        gly = ESCAPE_FONTBOLD;
                    315:                        break;
                    316:                case ('2'):
                    317:                        /* FALLTHROUGH */
                    318:                case ('I'):
                    319:                        gly = ESCAPE_FONTITALIC;
1.22      kristaps  320:                        break;
1.45      kristaps  321:                case ('P'):
                    322:                        gly = ESCAPE_FONTPREV;
1.22      kristaps  323:                        break;
1.45      kristaps  324:                case ('1'):
                    325:                        /* FALLTHROUGH */
                    326:                case ('R'):
                    327:                        gly = ESCAPE_FONTROMAN;
1.1       kristaps  328:                        break;
                    329:                }
1.46      kristaps  330:                break;
1.45      kristaps  331:        case (ESCAPE_SPECIAL):
                    332:                if (1 != rlim)
                    333:                        break;
                    334:                if ('c' == *rstart)
                    335:                        gly = ESCAPE_NOSPACE;
1.22      kristaps  336:                break;
1.1       kristaps  337:        default:
1.22      kristaps  338:                break;
1.1       kristaps  339:        }
                    340:
1.45      kristaps  341:        return(gly);
1.1       kristaps  342: }
1.4       kristaps  343:
                    344: void *
                    345: mandoc_calloc(size_t num, size_t size)
                    346: {
                    347:        void            *ptr;
                    348:
                    349:        ptr = calloc(num, size);
                    350:        if (NULL == ptr) {
1.6       kristaps  351:                perror(NULL);
1.35      kristaps  352:                exit((int)MANDOCLEVEL_SYSERR);
1.4       kristaps  353:        }
                    354:
                    355:        return(ptr);
                    356: }
                    357:
                    358:
                    359: void *
                    360: mandoc_malloc(size_t size)
                    361: {
                    362:        void            *ptr;
                    363:
                    364:        ptr = malloc(size);
                    365:        if (NULL == ptr) {
1.6       kristaps  366:                perror(NULL);
1.35      kristaps  367:                exit((int)MANDOCLEVEL_SYSERR);
1.4       kristaps  368:        }
                    369:
                    370:        return(ptr);
                    371: }
                    372:
                    373:
                    374: void *
                    375: mandoc_realloc(void *ptr, size_t size)
                    376: {
                    377:
                    378:        ptr = realloc(ptr, size);
                    379:        if (NULL == ptr) {
1.6       kristaps  380:                perror(NULL);
1.35      kristaps  381:                exit((int)MANDOCLEVEL_SYSERR);
1.4       kristaps  382:        }
                    383:
                    384:        return(ptr);
                    385: }
                    386:
1.55      kristaps  387: char *
                    388: mandoc_strndup(const char *ptr, size_t sz)
                    389: {
                    390:        char            *p;
                    391:
                    392:        p = mandoc_malloc(sz + 1);
                    393:        memcpy(p, ptr, sz);
                    394:        p[(int)sz] = '\0';
                    395:        return(p);
                    396: }
1.4       kristaps  397:
                    398: char *
                    399: mandoc_strdup(const char *ptr)
                    400: {
                    401:        char            *p;
                    402:
                    403:        p = strdup(ptr);
                    404:        if (NULL == p) {
1.6       kristaps  405:                perror(NULL);
1.35      kristaps  406:                exit((int)MANDOCLEVEL_SYSERR);
1.4       kristaps  407:        }
                    408:
                    409:        return(p);
1.36      schwarze  410: }
                    411:
                    412: /*
                    413:  * Parse a quoted or unquoted roff-style request or macro argument.
                    414:  * Return a pointer to the parsed argument, which is either the original
                    415:  * pointer or advanced by one byte in case the argument is quoted.
                    416:  * Null-terminate the argument in place.
                    417:  * Collapse pairs of quotes inside quoted arguments.
                    418:  * Advance the argument pointer to the next argument,
                    419:  * or to the null byte terminating the argument line.
                    420:  */
                    421: char *
1.48      kristaps  422: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.36      schwarze  423: {
                    424:        char     *start, *cp;
                    425:        int       quoted, pairs, white;
                    426:
                    427:        /* Quoting can only start with a new word. */
                    428:        start = *cpp;
1.47      kristaps  429:        quoted = 0;
1.36      schwarze  430:        if ('"' == *start) {
                    431:                quoted = 1;
                    432:                start++;
1.47      kristaps  433:        }
1.36      schwarze  434:
                    435:        pairs = 0;
                    436:        white = 0;
                    437:        for (cp = start; '\0' != *cp; cp++) {
                    438:                /* Move left after quoted quotes and escaped backslashes. */
                    439:                if (pairs)
                    440:                        cp[-pairs] = cp[0];
                    441:                if ('\\' == cp[0]) {
                    442:                        if ('\\' == cp[1]) {
                    443:                                /* Poor man's copy mode. */
                    444:                                pairs++;
                    445:                                cp++;
                    446:                        } else if (0 == quoted && ' ' == cp[1])
                    447:                                /* Skip escaped blanks. */
                    448:                                cp++;
                    449:                } else if (0 == quoted) {
                    450:                        if (' ' == cp[0]) {
                    451:                                /* Unescaped blanks end unquoted args. */
                    452:                                white = 1;
                    453:                                break;
                    454:                        }
                    455:                } else if ('"' == cp[0]) {
                    456:                        if ('"' == cp[1]) {
                    457:                                /* Quoted quotes collapse. */
                    458:                                pairs++;
                    459:                                cp++;
                    460:                        } else {
                    461:                                /* Unquoted quotes end quoted args. */
                    462:                                quoted = 2;
                    463:                                break;
                    464:                        }
                    465:                }
                    466:        }
                    467:
                    468:        /* Quoted argument without a closing quote. */
1.48      kristaps  469:        if (1 == quoted)
1.42      kristaps  470:                mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
1.36      schwarze  471:
                    472:        /* Null-terminate this argument and move to the next one. */
                    473:        if (pairs)
                    474:                cp[-pairs] = '\0';
                    475:        if ('\0' != *cp) {
                    476:                *cp++ = '\0';
                    477:                while (' ' == *cp)
                    478:                        cp++;
                    479:        }
1.39      kristaps  480:        *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.36      schwarze  481:        *cpp = cp;
                    482:
1.48      kristaps  483:        if ('\0' == *cp && (white || ' ' == cp[-1]))
1.42      kristaps  484:                mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
1.36      schwarze  485:
                    486:        return(start);
1.4       kristaps  487: }
1.7       kristaps  488:
                    489: static int
                    490: a2time(time_t *t, const char *fmt, const char *p)
                    491: {
                    492:        struct tm        tm;
                    493:        char            *pp;
                    494:
                    495:        memset(&tm, 0, sizeof(struct tm));
                    496:
1.56      kristaps  497:        pp = NULL;
                    498: #ifdef HAVE_STRPTIME
1.7       kristaps  499:        pp = strptime(p, fmt, &tm);
1.56      kristaps  500: #endif
1.7       kristaps  501:        if (NULL != pp && '\0' == *pp) {
                    502:                *t = mktime(&tm);
                    503:                return(1);
                    504:        }
                    505:
                    506:        return(0);
                    507: }
                    508:
1.37      schwarze  509: static char *
                    510: time2a(time_t t)
                    511: {
1.56      kristaps  512:        struct tm       *tm;
1.38      schwarze  513:        char            *buf, *p;
                    514:        size_t           ssz;
1.37      schwarze  515:        int              isz;
                    516:
1.56      kristaps  517:        tm = localtime(&t);
1.37      schwarze  518:
1.38      schwarze  519:        /*
                    520:         * Reserve space:
                    521:         * up to 9 characters for the month (September) + blank
                    522:         * up to 2 characters for the day + comma + blank
                    523:         * 4 characters for the year and a terminating '\0'
                    524:         */
                    525:        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
                    526:
1.56      kristaps  527:        if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
1.38      schwarze  528:                goto fail;
                    529:        p += (int)ssz;
1.37      schwarze  530:
1.56      kristaps  531:        if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
1.38      schwarze  532:                goto fail;
1.37      schwarze  533:        p += isz;
                    534:
1.56      kristaps  535:        if (0 == strftime(p, 4 + 1, "%Y", tm))
1.38      schwarze  536:                goto fail;
                    537:        return(buf);
                    538:
                    539: fail:
                    540:        free(buf);
                    541:        return(NULL);
1.37      schwarze  542: }
                    543:
                    544: char *
1.42      kristaps  545: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.7       kristaps  546: {
1.37      schwarze  547:        char            *out;
1.7       kristaps  548:        time_t           t;
                    549:
1.37      schwarze  550:        if (NULL == in || '\0' == *in ||
                    551:            0 == strcmp(in, "$" "Mdocdate$")) {
1.42      kristaps  552:                mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
1.37      schwarze  553:                time(&t);
                    554:        }
1.62      schwarze  555:        else if (a2time(&t, "%Y-%m-%d", in))
                    556:                t = 0;
1.37      schwarze  557:        else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
1.62      schwarze  558:            !a2time(&t, "%b %d, %Y", in)) {
1.42      kristaps  559:                mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
1.37      schwarze  560:                t = 0;
1.7       kristaps  561:        }
1.37      schwarze  562:        out = t ? time2a(t) : NULL;
1.38      schwarze  563:        return(out ? out : mandoc_strdup(in));
1.7       kristaps  564: }
                    565:
1.12      kristaps  566: int
1.23      schwarze  567: mandoc_eos(const char *p, size_t sz, int enclosed)
1.12      kristaps  568: {
1.23      schwarze  569:        const char *q;
                    570:        int found;
1.12      kristaps  571:
1.13      kristaps  572:        if (0 == sz)
                    573:                return(0);
1.12      kristaps  574:
1.14      kristaps  575:        /*
                    576:         * End-of-sentence recognition must include situations where
                    577:         * some symbols, such as `)', allow prior EOS punctuation to
1.49      kristaps  578:         * propagate outward.
1.14      kristaps  579:         */
                    580:
1.23      schwarze  581:        found = 0;
1.25      kristaps  582:        for (q = p + (int)sz - 1; q >= p; q--) {
1.23      schwarze  583:                switch (*q) {
1.14      kristaps  584:                case ('\"'):
                    585:                        /* FALLTHROUGH */
                    586:                case ('\''):
1.15      kristaps  587:                        /* FALLTHROUGH */
                    588:                case (']'):
1.14      kristaps  589:                        /* FALLTHROUGH */
                    590:                case (')'):
1.23      schwarze  591:                        if (0 == found)
                    592:                                enclosed = 1;
1.14      kristaps  593:                        break;
                    594:                case ('.'):
                    595:                        /* FALLTHROUGH */
                    596:                case ('!'):
                    597:                        /* FALLTHROUGH */
                    598:                case ('?'):
1.23      schwarze  599:                        found = 1;
                    600:                        break;
1.14      kristaps  601:                default:
1.27      joerg     602:                        return(found && (!enclosed || isalnum((unsigned char)*q)));
1.14      kristaps  603:                }
1.12      kristaps  604:        }
                    605:
1.23      schwarze  606:        return(found && !enclosed);
1.40      kristaps  607: }
                    608:
1.44      kristaps  609: /*
                    610:  * Find out whether a line is a macro line or not.  If it is, adjust the
                    611:  * current position and return one; if it isn't, return zero and don't
                    612:  * change the current position.
                    613:  */
                    614: int
                    615: mandoc_getcontrol(const char *cp, int *ppos)
                    616: {
                    617:        int             pos;
                    618:
                    619:        pos = *ppos;
                    620:
                    621:        if ('\\' == cp[pos] && '.' == cp[pos + 1])
                    622:                pos += 2;
                    623:        else if ('.' == cp[pos] || '\'' == cp[pos])
                    624:                pos++;
                    625:        else
                    626:                return(0);
                    627:
                    628:        while (' ' == cp[pos] || '\t' == cp[pos])
                    629:                pos++;
                    630:
                    631:        *ppos = pos;
                    632:        return(1);
                    633: }
1.50      kristaps  634:
                    635: /*
                    636:  * Convert a string to a long that may not be <0.
                    637:  * If the string is invalid, or is less than 0, return -1.
                    638:  */
                    639: int
1.54      kristaps  640: mandoc_strntoi(const char *p, size_t sz, int base)
1.50      kristaps  641: {
                    642:        char             buf[32];
                    643:        char            *ep;
                    644:        long             v;
                    645:
                    646:        if (sz > 31)
                    647:                return(-1);
                    648:
                    649:        memcpy(buf, p, sz);
1.51      kristaps  650:        buf[(int)sz] = '\0';
1.50      kristaps  651:
                    652:        errno = 0;
                    653:        v = strtol(buf, &ep, base);
                    654:
                    655:        if (buf[0] == '\0' || *ep != '\0')
                    656:                return(-1);
                    657:
1.54      kristaps  658:        if (v > INT_MAX)
                    659:                v = INT_MAX;
                    660:        if (v < INT_MIN)
                    661:                v = INT_MIN;
1.50      kristaps  662:
                    663:        return((int)v);
                    664: }

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