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Annotation of mandoc/mandoc.c, Revision 1.86

1.86    ! kristaps    1: /*     $Id: mandoc.c,v 1.85 2014/08/16 19:00:01 schwarze 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;
1.52      kristaps   82:                /*
                     83:                 * Unicode escapes are defined in groff as \[uXXXX] to
                     84:                 * \[u10FFFF], where the contained value must be a valid
                     85:                 * Unicode codepoint.  Here, however, only check whether
                     86:                 * it's not a zero-width escape.
                     87:                 */
1.65      schwarze   88:                if ('u' == (*start)[0] && ']' != (*start)[1])
1.52      kristaps   89:                        gly = ESCAPE_UNICODE;
1.45      kristaps   90:                term = ']';
                     91:                break;
1.79      schwarze   92:        case 'C':
1.65      schwarze   93:                if ('\'' != **start)
1.45      kristaps   94:                        return(ESCAPE_ERROR);
1.65      schwarze   95:                *start = ++*end;
1.70      schwarze   96:                if ('u' == (*start)[0] && '\'' != (*start)[1])
                     97:                        gly = ESCAPE_UNICODE;
                     98:                else
                     99:                        gly = ESCAPE_SPECIAL;
1.45      kristaps  100:                term = '\'';
                    101:                break;
1.72      schwarze  102:
                    103:        /*
                    104:         * Escapes taking no arguments at all.
                    105:         */
1.79      schwarze  106:        case 'd':
1.72      schwarze  107:                /* FALLTHROUGH */
1.79      schwarze  108:        case 'u':
1.72      schwarze  109:                return(ESCAPE_IGNORE);
1.63      schwarze  110:
                    111:        /*
                    112:         * The \z escape is supposed to output the following
1.79      schwarze  113:         * character without advancing the cursor position.
1.63      schwarze  114:         * Since we are mostly dealing with terminal mode,
                    115:         * let us just skip the next character.
                    116:         */
1.79      schwarze  117:        case 'z':
1.63      schwarze  118:                return(ESCAPE_SKIPCHAR);
1.1       kristaps  119:
1.45      kristaps  120:        /*
                    121:         * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
                    122:         * 'X' is the trigger.  These have opaque sub-strings.
                    123:         */
1.79      schwarze  124:        case 'F':
1.45      kristaps  125:                /* FALLTHROUGH */
1.79      schwarze  126:        case 'g':
1.24      kristaps  127:                /* FALLTHROUGH */
1.79      schwarze  128:        case 'k':
1.24      kristaps  129:                /* FALLTHROUGH */
1.79      schwarze  130:        case 'M':
1.24      kristaps  131:                /* FALLTHROUGH */
1.79      schwarze  132:        case 'm':
1.24      kristaps  133:                /* FALLTHROUGH */
1.79      schwarze  134:        case 'n':
1.24      kristaps  135:                /* FALLTHROUGH */
1.79      schwarze  136:        case 'V':
1.24      kristaps  137:                /* FALLTHROUGH */
1.79      schwarze  138:        case 'Y':
1.60      schwarze  139:                gly = ESCAPE_IGNORE;
1.24      kristaps  140:                /* FALLTHROUGH */
1.79      schwarze  141:        case 'f':
1.45      kristaps  142:                if (ESCAPE_ERROR == gly)
                    143:                        gly = ESCAPE_FONT;
1.65      schwarze  144:                switch (**start) {
1.79      schwarze  145:                case '(':
1.65      schwarze  146:                        *start = ++*end;
                    147:                        *sz = 2;
1.45      kristaps  148:                        break;
1.79      schwarze  149:                case '[':
1.65      schwarze  150:                        *start = ++*end;
1.45      kristaps  151:                        term = ']';
                    152:                        break;
                    153:                default:
1.65      schwarze  154:                        *sz = 1;
1.45      kristaps  155:                        break;
                    156:                }
                    157:                break;
                    158:
                    159:        /*
                    160:         * These escapes are of the form \X'Y', where 'X' is the trigger
                    161:         * and 'Y' is any string.  These have opaque sub-strings.
1.78      schwarze  162:         * The \B and \w escapes are handled in roff.c, roff_res().
1.45      kristaps  163:         */
1.79      schwarze  164:        case 'A':
1.24      kristaps  165:                /* FALLTHROUGH */
1.79      schwarze  166:        case 'b':
1.24      kristaps  167:                /* FALLTHROUGH */
1.79      schwarze  168:        case 'D':
1.24      kristaps  169:                /* FALLTHROUGH */
1.79      schwarze  170:        case 'o':
1.24      kristaps  171:                /* FALLTHROUGH */
1.79      schwarze  172:        case 'R':
1.73      schwarze  173:                /* FALLTHROUGH */
1.79      schwarze  174:        case 'X':
1.24      kristaps  175:                /* FALLTHROUGH */
1.79      schwarze  176:        case 'Z':
1.77      schwarze  177:                if ('\0' == **start)
1.45      kristaps  178:                        return(ESCAPE_ERROR);
                    179:                gly = ESCAPE_IGNORE;
1.77      schwarze  180:                term = **start;
1.65      schwarze  181:                *start = ++*end;
1.24      kristaps  182:                break;
1.45      kristaps  183:
                    184:        /*
                    185:         * These escapes are of the form \X'N', where 'X' is the trigger
                    186:         * and 'N' resolves to a numerical expression.
                    187:         */
1.79      schwarze  188:        case 'h':
1.28      kristaps  189:                /* FALLTHROUGH */
1.79      schwarze  190:        case 'H':
1.45      kristaps  191:                /* FALLTHROUGH */
1.79      schwarze  192:        case 'L':
1.45      kristaps  193:                /* FALLTHROUGH */
1.79      schwarze  194:        case 'l':
1.45      kristaps  195:                /* FALLTHROUGH */
1.79      schwarze  196:        case 'S':
1.45      kristaps  197:                /* FALLTHROUGH */
1.79      schwarze  198:        case 'v':
1.28      kristaps  199:                /* FALLTHROUGH */
1.79      schwarze  200:        case 'x':
1.82      schwarze  201:                if (strchr(" %&()*+-./0123456789:<=>", **start)) {
1.86    ! kristaps  202:                        if ('\0' != **start)
        !           203:                                ++*end;
1.65      schwarze  204:                        return(ESCAPE_ERROR);
1.82      schwarze  205:                }
1.73      schwarze  206:                gly = ESCAPE_IGNORE;
1.77      schwarze  207:                term = **start;
1.65      schwarze  208:                *start = ++*end;
1.45      kristaps  209:                break;
1.60      schwarze  210:
                    211:        /*
                    212:         * Special handling for the numbered character escape.
                    213:         * XXX Do any other escapes need similar handling?
                    214:         */
1.79      schwarze  215:        case 'N':
1.65      schwarze  216:                if ('\0' == **start)
1.60      schwarze  217:                        return(ESCAPE_ERROR);
1.65      schwarze  218:                (*end)++;
                    219:                if (isdigit((unsigned char)**start)) {
                    220:                        *sz = 1;
1.60      schwarze  221:                        return(ESCAPE_IGNORE);
1.65      schwarze  222:                }
                    223:                (*start)++;
1.60      schwarze  224:                while (isdigit((unsigned char)**end))
                    225:                        (*end)++;
1.65      schwarze  226:                *sz = *end - *start;
1.60      schwarze  227:                if ('\0' != **end)
                    228:                        (*end)++;
                    229:                return(ESCAPE_NUMBERED);
1.45      kristaps  230:
1.79      schwarze  231:        /*
1.45      kristaps  232:         * Sizes get a special category of their own.
                    233:         */
1.79      schwarze  234:        case 's':
1.45      kristaps  235:                gly = ESCAPE_IGNORE;
1.28      kristaps  236:
1.45      kristaps  237:                /* See +/- counts as a sign. */
1.65      schwarze  238:                if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
                    239:                        (*end)++;
1.8       kristaps  240:
1.65      schwarze  241:                switch (**end) {
1.79      schwarze  242:                case '(':
1.65      schwarze  243:                        *start = ++*end;
                    244:                        *sz = 2;
1.22      kristaps  245:                        break;
1.79      schwarze  246:                case '[':
1.65      schwarze  247:                        *start = ++*end;
1.64      schwarze  248:                        term = ']';
1.22      kristaps  249:                        break;
1.79      schwarze  250:                case '\'':
1.65      schwarze  251:                        *start = ++*end;
1.64      schwarze  252:                        term = '\'';
1.22      kristaps  253:                        break;
                    254:                default:
1.65      schwarze  255:                        *sz = 1;
1.22      kristaps  256:                        break;
1.8       kristaps  257:                }
                    258:
1.45      kristaps  259:                break;
1.33      kristaps  260:
1.45      kristaps  261:        /*
                    262:         * Anything else is assumed to be a glyph.
1.65      schwarze  263:         * In this case, pass back the character after the backslash.
1.45      kristaps  264:         */
                    265:        default:
                    266:                gly = ESCAPE_SPECIAL;
1.65      schwarze  267:                *start = --*end;
                    268:                *sz = 1;
1.22      kristaps  269:                break;
1.45      kristaps  270:        }
                    271:
                    272:        assert(ESCAPE_ERROR != gly);
                    273:
                    274:        /*
1.64      schwarze  275:         * Read up to the terminating character,
                    276:         * paying attention to nested escapes.
1.45      kristaps  277:         */
                    278:
                    279:        if ('\0' != term) {
1.64      schwarze  280:                while (**end != term) {
                    281:                        switch (**end) {
1.79      schwarze  282:                        case '\0':
1.64      schwarze  283:                                return(ESCAPE_ERROR);
1.79      schwarze  284:                        case '\\':
1.64      schwarze  285:                                (*end)++;
                    286:                                if (ESCAPE_ERROR ==
                    287:                                    mandoc_escape(end, NULL, NULL))
                    288:                                        return(ESCAPE_ERROR);
                    289:                                break;
                    290:                        default:
                    291:                                (*end)++;
                    292:                                break;
                    293:                        }
                    294:                }
1.65      schwarze  295:                *sz = (*end)++ - *start;
1.64      schwarze  296:        } else {
1.65      schwarze  297:                assert(*sz > 0);
                    298:                if ((size_t)*sz > strlen(*start))
1.45      kristaps  299:                        return(ESCAPE_ERROR);
1.65      schwarze  300:                *end += *sz;
1.45      kristaps  301:        }
                    302:
                    303:        /* Run post-processors. */
                    304:
                    305:        switch (gly) {
1.79      schwarze  306:        case ESCAPE_FONT:
1.68      schwarze  307:                if (2 == *sz) {
                    308:                        if ('C' == **start) {
                    309:                                /*
                    310:                                 * Treat constant-width font modes
                    311:                                 * just like regular font modes.
                    312:                                 */
                    313:                                (*start)++;
                    314:                                (*sz)--;
                    315:                        } else {
                    316:                                if ('B' == (*start)[0] && 'I' == (*start)[1])
                    317:                                        gly = ESCAPE_FONTBI;
                    318:                                break;
                    319:                        }
1.65      schwarze  320:                } else if (1 != *sz)
1.45      kristaps  321:                        break;
1.61      kristaps  322:
1.65      schwarze  323:                switch (**start) {
1.79      schwarze  324:                case '3':
1.45      kristaps  325:                        /* FALLTHROUGH */
1.79      schwarze  326:                case 'B':
1.45      kristaps  327:                        gly = ESCAPE_FONTBOLD;
                    328:                        break;
1.79      schwarze  329:                case '2':
1.45      kristaps  330:                        /* FALLTHROUGH */
1.79      schwarze  331:                case 'I':
1.45      kristaps  332:                        gly = ESCAPE_FONTITALIC;
1.22      kristaps  333:                        break;
1.79      schwarze  334:                case 'P':
1.45      kristaps  335:                        gly = ESCAPE_FONTPREV;
1.22      kristaps  336:                        break;
1.79      schwarze  337:                case '1':
1.45      kristaps  338:                        /* FALLTHROUGH */
1.79      schwarze  339:                case 'R':
1.45      kristaps  340:                        gly = ESCAPE_FONTROMAN;
1.1       kristaps  341:                        break;
                    342:                }
1.46      kristaps  343:                break;
1.79      schwarze  344:        case ESCAPE_SPECIAL:
1.65      schwarze  345:                if (1 == *sz && 'c' == **start)
1.45      kristaps  346:                        gly = ESCAPE_NOSPACE;
1.22      kristaps  347:                break;
1.1       kristaps  348:        default:
1.22      kristaps  349:                break;
1.1       kristaps  350:        }
                    351:
1.45      kristaps  352:        return(gly);
1.36      schwarze  353: }
                    354:
                    355: /*
                    356:  * Parse a quoted or unquoted roff-style request or macro argument.
                    357:  * Return a pointer to the parsed argument, which is either the original
                    358:  * pointer or advanced by one byte in case the argument is quoted.
1.71      schwarze  359:  * NUL-terminate the argument in place.
1.36      schwarze  360:  * Collapse pairs of quotes inside quoted arguments.
                    361:  * Advance the argument pointer to the next argument,
1.71      schwarze  362:  * or to the NUL byte terminating the argument line.
1.36      schwarze  363:  */
                    364: char *
1.48      kristaps  365: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.36      schwarze  366: {
                    367:        char     *start, *cp;
                    368:        int       quoted, pairs, white;
                    369:
                    370:        /* Quoting can only start with a new word. */
                    371:        start = *cpp;
1.47      kristaps  372:        quoted = 0;
1.36      schwarze  373:        if ('"' == *start) {
                    374:                quoted = 1;
                    375:                start++;
1.79      schwarze  376:        }
1.36      schwarze  377:
                    378:        pairs = 0;
                    379:        white = 0;
                    380:        for (cp = start; '\0' != *cp; cp++) {
1.67      schwarze  381:
                    382:                /*
                    383:                 * Move the following text left
                    384:                 * after quoted quotes and after "\\" and "\t".
                    385:                 */
1.36      schwarze  386:                if (pairs)
                    387:                        cp[-pairs] = cp[0];
1.67      schwarze  388:
1.36      schwarze  389:                if ('\\' == cp[0]) {
1.67      schwarze  390:                        /*
                    391:                         * In copy mode, translate double to single
                    392:                         * backslashes and backslash-t to literal tabs.
                    393:                         */
                    394:                        switch (cp[1]) {
1.79      schwarze  395:                        case 't':
1.67      schwarze  396:                                cp[0] = '\t';
                    397:                                /* FALLTHROUGH */
1.79      schwarze  398:                        case '\\':
1.36      schwarze  399:                                pairs++;
                    400:                                cp++;
1.67      schwarze  401:                                break;
1.79      schwarze  402:                        case ' ':
1.36      schwarze  403:                                /* Skip escaped blanks. */
1.67      schwarze  404:                                if (0 == quoted)
                    405:                                        cp++;
                    406:                                break;
                    407:                        default:
                    408:                                break;
                    409:                        }
1.36      schwarze  410:                } else if (0 == quoted) {
                    411:                        if (' ' == cp[0]) {
                    412:                                /* Unescaped blanks end unquoted args. */
                    413:                                white = 1;
                    414:                                break;
                    415:                        }
                    416:                } else if ('"' == cp[0]) {
                    417:                        if ('"' == cp[1]) {
                    418:                                /* Quoted quotes collapse. */
                    419:                                pairs++;
                    420:                                cp++;
                    421:                        } else {
                    422:                                /* Unquoted quotes end quoted args. */
                    423:                                quoted = 2;
                    424:                                break;
                    425:                        }
                    426:                }
                    427:        }
                    428:
                    429:        /* Quoted argument without a closing quote. */
1.48      kristaps  430:        if (1 == quoted)
1.83      schwarze  431:                mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
1.36      schwarze  432:
1.71      schwarze  433:        /* NUL-terminate this argument and move to the next one. */
1.36      schwarze  434:        if (pairs)
                    435:                cp[-pairs] = '\0';
                    436:        if ('\0' != *cp) {
                    437:                *cp++ = '\0';
                    438:                while (' ' == *cp)
                    439:                        cp++;
                    440:        }
1.39      kristaps  441:        *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.36      schwarze  442:        *cpp = cp;
                    443:
1.48      kristaps  444:        if ('\0' == *cp && (white || ' ' == cp[-1]))
1.83      schwarze  445:                mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
1.36      schwarze  446:
                    447:        return(start);
1.4       kristaps  448: }
1.7       kristaps  449:
                    450: static int
                    451: a2time(time_t *t, const char *fmt, const char *p)
                    452: {
                    453:        struct tm        tm;
                    454:        char            *pp;
                    455:
                    456:        memset(&tm, 0, sizeof(struct tm));
                    457:
1.56      kristaps  458:        pp = NULL;
1.85      schwarze  459: #if HAVE_STRPTIME
1.7       kristaps  460:        pp = strptime(p, fmt, &tm);
1.56      kristaps  461: #endif
1.7       kristaps  462:        if (NULL != pp && '\0' == *pp) {
                    463:                *t = mktime(&tm);
                    464:                return(1);
                    465:        }
                    466:
                    467:        return(0);
                    468: }
                    469:
1.37      schwarze  470: static char *
                    471: time2a(time_t t)
                    472: {
1.56      kristaps  473:        struct tm       *tm;
1.38      schwarze  474:        char            *buf, *p;
                    475:        size_t           ssz;
1.37      schwarze  476:        int              isz;
                    477:
1.56      kristaps  478:        tm = localtime(&t);
1.37      schwarze  479:
1.38      schwarze  480:        /*
                    481:         * Reserve space:
                    482:         * up to 9 characters for the month (September) + blank
                    483:         * up to 2 characters for the day + comma + blank
                    484:         * 4 characters for the year and a terminating '\0'
                    485:         */
                    486:        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
                    487:
1.56      kristaps  488:        if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
1.38      schwarze  489:                goto fail;
                    490:        p += (int)ssz;
1.37      schwarze  491:
1.56      kristaps  492:        if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
1.38      schwarze  493:                goto fail;
1.37      schwarze  494:        p += isz;
                    495:
1.56      kristaps  496:        if (0 == strftime(p, 4 + 1, "%Y", tm))
1.38      schwarze  497:                goto fail;
                    498:        return(buf);
                    499:
                    500: fail:
                    501:        free(buf);
                    502:        return(NULL);
1.37      schwarze  503: }
                    504:
                    505: char *
1.42      kristaps  506: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.7       kristaps  507: {
1.37      schwarze  508:        char            *out;
1.7       kristaps  509:        time_t           t;
                    510:
1.37      schwarze  511:        if (NULL == in || '\0' == *in ||
                    512:            0 == strcmp(in, "$" "Mdocdate$")) {
1.80      schwarze  513:                mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
1.37      schwarze  514:                time(&t);
                    515:        }
1.62      schwarze  516:        else if (a2time(&t, "%Y-%m-%d", in))
                    517:                t = 0;
1.37      schwarze  518:        else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
1.62      schwarze  519:            !a2time(&t, "%b %d, %Y", in)) {
1.81      schwarze  520:                mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
1.37      schwarze  521:                t = 0;
1.7       kristaps  522:        }
1.37      schwarze  523:        out = t ? time2a(t) : NULL;
1.38      schwarze  524:        return(out ? out : mandoc_strdup(in));
1.7       kristaps  525: }
                    526:
1.12      kristaps  527: int
1.75      schwarze  528: mandoc_eos(const char *p, size_t sz)
1.12      kristaps  529: {
1.75      schwarze  530:        const char      *q;
                    531:        int              enclosed, found;
1.12      kristaps  532:
1.13      kristaps  533:        if (0 == sz)
                    534:                return(0);
1.12      kristaps  535:
1.14      kristaps  536:        /*
                    537:         * End-of-sentence recognition must include situations where
                    538:         * some symbols, such as `)', allow prior EOS punctuation to
1.49      kristaps  539:         * propagate outward.
1.14      kristaps  540:         */
                    541:
1.75      schwarze  542:        enclosed = found = 0;
1.25      kristaps  543:        for (q = p + (int)sz - 1; q >= p; q--) {
1.23      schwarze  544:                switch (*q) {
1.79      schwarze  545:                case '\"':
1.14      kristaps  546:                        /* FALLTHROUGH */
1.79      schwarze  547:                case '\'':
1.15      kristaps  548:                        /* FALLTHROUGH */
1.79      schwarze  549:                case ']':
1.14      kristaps  550:                        /* FALLTHROUGH */
1.79      schwarze  551:                case ')':
1.23      schwarze  552:                        if (0 == found)
                    553:                                enclosed = 1;
1.14      kristaps  554:                        break;
1.79      schwarze  555:                case '.':
1.14      kristaps  556:                        /* FALLTHROUGH */
1.79      schwarze  557:                case '!':
1.14      kristaps  558:                        /* FALLTHROUGH */
1.79      schwarze  559:                case '?':
1.23      schwarze  560:                        found = 1;
                    561:                        break;
1.14      kristaps  562:                default:
1.27      joerg     563:                        return(found && (!enclosed || isalnum((unsigned char)*q)));
1.14      kristaps  564:                }
1.12      kristaps  565:        }
                    566:
1.23      schwarze  567:        return(found && !enclosed);
1.44      kristaps  568: }
1.50      kristaps  569:
                    570: /*
                    571:  * Convert a string to a long that may not be <0.
                    572:  * If the string is invalid, or is less than 0, return -1.
                    573:  */
                    574: int
1.54      kristaps  575: mandoc_strntoi(const char *p, size_t sz, int base)
1.50      kristaps  576: {
                    577:        char             buf[32];
                    578:        char            *ep;
                    579:        long             v;
                    580:
                    581:        if (sz > 31)
                    582:                return(-1);
                    583:
                    584:        memcpy(buf, p, sz);
1.51      kristaps  585:        buf[(int)sz] = '\0';
1.50      kristaps  586:
                    587:        errno = 0;
                    588:        v = strtol(buf, &ep, base);
                    589:
                    590:        if (buf[0] == '\0' || *ep != '\0')
                    591:                return(-1);
                    592:
1.54      kristaps  593:        if (v > INT_MAX)
                    594:                v = INT_MAX;
                    595:        if (v < INT_MIN)
                    596:                v = INT_MIN;
1.50      kristaps  597:
                    598:        return((int)v);
                    599: }

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