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Annotation of mandoc/mandoc.c, Revision 1.100

1.100   ! schwarze    1: /*     $Id: mandoc.c,v 1.99 2017/06/01 19:05:37 schwarze Exp $ */
1.1       kristaps    2: /*
1.90      schwarze    3:  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.100   ! schwarze    4:  * Copyright (c) 2011-2015, 2017 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"
1.37      schwarze   34:
1.18      kristaps   35: static int      a2time(time_t *, const char *, const char *);
1.37      schwarze   36: static char    *time2a(time_t);
1.7       kristaps   37:
1.45      kristaps   38:
                     39: enum mandoc_esc
1.74      schwarze   40: mandoc_escape(const char **end, const char **start, int *sz)
1.1       kristaps   41: {
1.65      schwarze   42:        const char      *local_start;
                     43:        int              local_sz;
                     44:        char             term;
1.79      schwarze   45:        enum mandoc_esc  gly;
1.45      kristaps   46:
1.65      schwarze   47:        /*
                     48:         * When the caller doesn't provide return storage,
                     49:         * use local storage.
                     50:         */
                     51:
                     52:        if (NULL == start)
                     53:                start = &local_start;
                     54:        if (NULL == sz)
                     55:                sz = &local_sz;
                     56:
                     57:        /*
                     58:         * Beyond the backslash, at least one input character
                     59:         * is part of the escape sequence.  With one exception
                     60:         * (see below), that character won't be returned.
                     61:         */
                     62:
1.45      kristaps   63:        gly = ESCAPE_ERROR;
1.65      schwarze   64:        *start = ++*end;
                     65:        *sz = 0;
1.64      schwarze   66:        term = '\0';
1.18      kristaps   67:
1.65      schwarze   68:        switch ((*start)[-1]) {
1.45      kristaps   69:        /*
                     70:         * First the glyphs.  There are several different forms of
                     71:         * these, but each eventually returns a substring of the glyph
                     72:         * name.
                     73:         */
1.79      schwarze   74:        case '(':
1.45      kristaps   75:                gly = ESCAPE_SPECIAL;
1.65      schwarze   76:                *sz = 2;
1.45      kristaps   77:                break;
1.79      schwarze   78:        case '[':
1.45      kristaps   79:                gly = ESCAPE_SPECIAL;
                     80:                term = ']';
                     81:                break;
1.79      schwarze   82:        case 'C':
1.65      schwarze   83:                if ('\'' != **start)
1.94      schwarze   84:                        return ESCAPE_ERROR;
1.65      schwarze   85:                *start = ++*end;
1.87      schwarze   86:                gly = ESCAPE_SPECIAL;
1.45      kristaps   87:                term = '\'';
                     88:                break;
1.72      schwarze   89:
                     90:        /*
                     91:         * Escapes taking no arguments at all.
                     92:         */
1.79      schwarze   93:        case 'd':
                     94:        case 'u':
1.93      schwarze   95:        case ',':
                     96:        case '/':
1.94      schwarze   97:                return ESCAPE_IGNORE;
1.63      schwarze   98:
                     99:        /*
                    100:         * The \z escape is supposed to output the following
1.79      schwarze  101:         * character without advancing the cursor position.
1.63      schwarze  102:         * Since we are mostly dealing with terminal mode,
                    103:         * let us just skip the next character.
                    104:         */
1.79      schwarze  105:        case 'z':
1.94      schwarze  106:                return ESCAPE_SKIPCHAR;
1.1       kristaps  107:
1.45      kristaps  108:        /*
                    109:         * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
                    110:         * 'X' is the trigger.  These have opaque sub-strings.
                    111:         */
1.79      schwarze  112:        case 'F':
                    113:        case 'g':
                    114:        case 'k':
                    115:        case 'M':
                    116:        case 'm':
                    117:        case 'n':
                    118:        case 'V':
                    119:        case 'Y':
1.60      schwarze  120:                gly = ESCAPE_IGNORE;
1.24      kristaps  121:                /* FALLTHROUGH */
1.79      schwarze  122:        case 'f':
1.45      kristaps  123:                if (ESCAPE_ERROR == gly)
                    124:                        gly = ESCAPE_FONT;
1.65      schwarze  125:                switch (**start) {
1.79      schwarze  126:                case '(':
1.65      schwarze  127:                        *start = ++*end;
                    128:                        *sz = 2;
1.45      kristaps  129:                        break;
1.79      schwarze  130:                case '[':
1.65      schwarze  131:                        *start = ++*end;
1.45      kristaps  132:                        term = ']';
                    133:                        break;
                    134:                default:
1.65      schwarze  135:                        *sz = 1;
1.45      kristaps  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.
1.78      schwarze  143:         * The \B and \w escapes are handled in roff.c, roff_res().
1.45      kristaps  144:         */
1.79      schwarze  145:        case 'A':
                    146:        case 'b':
                    147:        case 'D':
                    148:        case 'R':
                    149:        case 'X':
                    150:        case 'Z':
1.91      schwarze  151:                gly = ESCAPE_IGNORE;
                    152:                /* FALLTHROUGH */
                    153:        case 'o':
                    154:                if (**start == '\0')
1.94      schwarze  155:                        return ESCAPE_ERROR;
1.91      schwarze  156:                if (gly == ESCAPE_ERROR)
                    157:                        gly = ESCAPE_OVERSTRIKE;
1.77      schwarze  158:                term = **start;
1.65      schwarze  159:                *start = ++*end;
1.24      kristaps  160:                break;
1.45      kristaps  161:
                    162:        /*
                    163:         * These escapes are of the form \X'N', where 'X' is the trigger
                    164:         * and 'N' resolves to a numerical expression.
                    165:         */
1.79      schwarze  166:        case 'h':
                    167:        case 'H':
                    168:        case 'L':
                    169:        case 'l':
                    170:        case 'S':
                    171:        case 'v':
                    172:        case 'x':
1.82      schwarze  173:                if (strchr(" %&()*+-./0123456789:<=>", **start)) {
1.86      kristaps  174:                        if ('\0' != **start)
                    175:                                ++*end;
1.94      schwarze  176:                        return ESCAPE_ERROR;
1.82      schwarze  177:                }
1.100   ! schwarze  178:                switch ((*start)[-1]) {
        !           179:                case 'h':
        !           180:                        gly = ESCAPE_HORIZ;
        !           181:                        break;
        !           182:                case 'l':
        !           183:                        gly = ESCAPE_HLINE;
        !           184:                        break;
        !           185:                default:
        !           186:                        gly = ESCAPE_IGNORE;
        !           187:                        break;
        !           188:                }
1.77      schwarze  189:                term = **start;
1.65      schwarze  190:                *start = ++*end;
1.45      kristaps  191:                break;
1.60      schwarze  192:
                    193:        /*
                    194:         * Special handling for the numbered character escape.
                    195:         * XXX Do any other escapes need similar handling?
                    196:         */
1.79      schwarze  197:        case 'N':
1.65      schwarze  198:                if ('\0' == **start)
1.94      schwarze  199:                        return ESCAPE_ERROR;
1.65      schwarze  200:                (*end)++;
                    201:                if (isdigit((unsigned char)**start)) {
                    202:                        *sz = 1;
1.94      schwarze  203:                        return ESCAPE_IGNORE;
1.65      schwarze  204:                }
                    205:                (*start)++;
1.60      schwarze  206:                while (isdigit((unsigned char)**end))
                    207:                        (*end)++;
1.65      schwarze  208:                *sz = *end - *start;
1.60      schwarze  209:                if ('\0' != **end)
                    210:                        (*end)++;
1.94      schwarze  211:                return ESCAPE_NUMBERED;
1.45      kristaps  212:
1.79      schwarze  213:        /*
1.45      kristaps  214:         * Sizes get a special category of their own.
                    215:         */
1.79      schwarze  216:        case 's':
1.45      kristaps  217:                gly = ESCAPE_IGNORE;
1.28      kristaps  218:
1.45      kristaps  219:                /* See +/- counts as a sign. */
1.65      schwarze  220:                if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
1.90      schwarze  221:                        *start = ++*end;
1.8       kristaps  222:
1.65      schwarze  223:                switch (**end) {
1.79      schwarze  224:                case '(':
1.65      schwarze  225:                        *start = ++*end;
                    226:                        *sz = 2;
1.22      kristaps  227:                        break;
1.79      schwarze  228:                case '[':
1.65      schwarze  229:                        *start = ++*end;
1.64      schwarze  230:                        term = ']';
1.22      kristaps  231:                        break;
1.79      schwarze  232:                case '\'':
1.65      schwarze  233:                        *start = ++*end;
1.64      schwarze  234:                        term = '\'';
1.92      schwarze  235:                        break;
                    236:                case '3':
                    237:                case '2':
                    238:                case '1':
                    239:                        *sz = (*end)[-1] == 's' &&
                    240:                            isdigit((unsigned char)(*end)[1]) ? 2 : 1;
1.22      kristaps  241:                        break;
                    242:                default:
1.65      schwarze  243:                        *sz = 1;
1.22      kristaps  244:                        break;
1.8       kristaps  245:                }
                    246:
1.45      kristaps  247:                break;
1.33      kristaps  248:
1.45      kristaps  249:        /*
                    250:         * Anything else is assumed to be a glyph.
1.65      schwarze  251:         * In this case, pass back the character after the backslash.
1.45      kristaps  252:         */
                    253:        default:
                    254:                gly = ESCAPE_SPECIAL;
1.65      schwarze  255:                *start = --*end;
                    256:                *sz = 1;
1.22      kristaps  257:                break;
1.45      kristaps  258:        }
                    259:
                    260:        assert(ESCAPE_ERROR != gly);
                    261:
                    262:        /*
1.64      schwarze  263:         * Read up to the terminating character,
                    264:         * paying attention to nested escapes.
1.45      kristaps  265:         */
                    266:
                    267:        if ('\0' != term) {
1.64      schwarze  268:                while (**end != term) {
                    269:                        switch (**end) {
1.79      schwarze  270:                        case '\0':
1.94      schwarze  271:                                return ESCAPE_ERROR;
1.79      schwarze  272:                        case '\\':
1.64      schwarze  273:                                (*end)++;
                    274:                                if (ESCAPE_ERROR ==
                    275:                                    mandoc_escape(end, NULL, NULL))
1.94      schwarze  276:                                        return ESCAPE_ERROR;
1.64      schwarze  277:                                break;
                    278:                        default:
                    279:                                (*end)++;
                    280:                                break;
                    281:                        }
                    282:                }
1.65      schwarze  283:                *sz = (*end)++ - *start;
1.64      schwarze  284:        } else {
1.65      schwarze  285:                assert(*sz > 0);
                    286:                if ((size_t)*sz > strlen(*start))
1.94      schwarze  287:                        return ESCAPE_ERROR;
1.65      schwarze  288:                *end += *sz;
1.45      kristaps  289:        }
                    290:
                    291:        /* Run post-processors. */
                    292:
                    293:        switch (gly) {
1.79      schwarze  294:        case ESCAPE_FONT:
1.68      schwarze  295:                if (2 == *sz) {
                    296:                        if ('C' == **start) {
                    297:                                /*
                    298:                                 * Treat constant-width font modes
                    299:                                 * just like regular font modes.
                    300:                                 */
                    301:                                (*start)++;
                    302:                                (*sz)--;
                    303:                        } else {
                    304:                                if ('B' == (*start)[0] && 'I' == (*start)[1])
                    305:                                        gly = ESCAPE_FONTBI;
                    306:                                break;
                    307:                        }
1.65      schwarze  308:                } else if (1 != *sz)
1.45      kristaps  309:                        break;
1.61      kristaps  310:
1.65      schwarze  311:                switch (**start) {
1.79      schwarze  312:                case '3':
                    313:                case 'B':
1.45      kristaps  314:                        gly = ESCAPE_FONTBOLD;
                    315:                        break;
1.79      schwarze  316:                case '2':
                    317:                case 'I':
1.45      kristaps  318:                        gly = ESCAPE_FONTITALIC;
1.22      kristaps  319:                        break;
1.79      schwarze  320:                case 'P':
1.45      kristaps  321:                        gly = ESCAPE_FONTPREV;
1.22      kristaps  322:                        break;
1.79      schwarze  323:                case '1':
                    324:                case 'R':
1.45      kristaps  325:                        gly = ESCAPE_FONTROMAN;
1.1       kristaps  326:                        break;
                    327:                }
1.46      kristaps  328:                break;
1.79      schwarze  329:        case ESCAPE_SPECIAL:
1.65      schwarze  330:                if (1 == *sz && 'c' == **start)
1.45      kristaps  331:                        gly = ESCAPE_NOSPACE;
1.87      schwarze  332:                /*
1.88      schwarze  333:                 * Unicode escapes are defined in groff as \[u0000]
1.87      schwarze  334:                 * to \[u10FFFF], where the contained value must be
                    335:                 * a valid Unicode codepoint.  Here, however, only
1.88      schwarze  336:                 * check the length and range.
1.87      schwarze  337:                 */
1.88      schwarze  338:                if (**start != 'u' || *sz < 5 || *sz > 7)
                    339:                        break;
                    340:                if (*sz == 7 && ((*start)[1] != '1' || (*start)[2] != '0'))
                    341:                        break;
                    342:                if (*sz == 6 && (*start)[1] == '0')
1.96      schwarze  343:                        break;
                    344:                if (*sz == 5 && (*start)[1] == 'D' &&
                    345:                    strchr("89ABCDEF", (*start)[2]) != NULL)
1.88      schwarze  346:                        break;
                    347:                if ((int)strspn(*start + 1, "0123456789ABCDEFabcdef")
1.87      schwarze  348:                    + 1 == *sz)
                    349:                        gly = ESCAPE_UNICODE;
1.22      kristaps  350:                break;
1.1       kristaps  351:        default:
1.22      kristaps  352:                break;
1.1       kristaps  353:        }
                    354:
1.94      schwarze  355:        return gly;
1.36      schwarze  356: }
                    357:
                    358: /*
                    359:  * Parse a quoted or unquoted roff-style request or macro argument.
                    360:  * Return a pointer to the parsed argument, which is either the original
                    361:  * pointer or advanced by one byte in case the argument is quoted.
1.71      schwarze  362:  * NUL-terminate the argument in place.
1.36      schwarze  363:  * Collapse pairs of quotes inside quoted arguments.
                    364:  * Advance the argument pointer to the next argument,
1.71      schwarze  365:  * or to the NUL byte terminating the argument line.
1.36      schwarze  366:  */
                    367: char *
1.48      kristaps  368: mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
1.36      schwarze  369: {
                    370:        char     *start, *cp;
                    371:        int       quoted, pairs, white;
                    372:
                    373:        /* Quoting can only start with a new word. */
                    374:        start = *cpp;
1.47      kristaps  375:        quoted = 0;
1.36      schwarze  376:        if ('"' == *start) {
                    377:                quoted = 1;
                    378:                start++;
1.79      schwarze  379:        }
1.36      schwarze  380:
                    381:        pairs = 0;
                    382:        white = 0;
                    383:        for (cp = start; '\0' != *cp; cp++) {
1.67      schwarze  384:
                    385:                /*
                    386:                 * Move the following text left
                    387:                 * after quoted quotes and after "\\" and "\t".
                    388:                 */
1.36      schwarze  389:                if (pairs)
                    390:                        cp[-pairs] = cp[0];
1.67      schwarze  391:
1.36      schwarze  392:                if ('\\' == cp[0]) {
1.67      schwarze  393:                        /*
                    394:                         * In copy mode, translate double to single
                    395:                         * backslashes and backslash-t to literal tabs.
                    396:                         */
                    397:                        switch (cp[1]) {
1.79      schwarze  398:                        case 't':
1.67      schwarze  399:                                cp[0] = '\t';
                    400:                                /* FALLTHROUGH */
1.79      schwarze  401:                        case '\\':
1.36      schwarze  402:                                pairs++;
                    403:                                cp++;
1.67      schwarze  404:                                break;
1.79      schwarze  405:                        case ' ':
1.36      schwarze  406:                                /* Skip escaped blanks. */
1.67      schwarze  407:                                if (0 == quoted)
                    408:                                        cp++;
                    409:                                break;
                    410:                        default:
                    411:                                break;
                    412:                        }
1.36      schwarze  413:                } else if (0 == quoted) {
                    414:                        if (' ' == cp[0]) {
                    415:                                /* Unescaped blanks end unquoted args. */
                    416:                                white = 1;
                    417:                                break;
                    418:                        }
                    419:                } else if ('"' == cp[0]) {
                    420:                        if ('"' == cp[1]) {
                    421:                                /* Quoted quotes collapse. */
                    422:                                pairs++;
                    423:                                cp++;
                    424:                        } else {
                    425:                                /* Unquoted quotes end quoted args. */
                    426:                                quoted = 2;
                    427:                                break;
                    428:                        }
                    429:                }
                    430:        }
                    431:
                    432:        /* Quoted argument without a closing quote. */
1.48      kristaps  433:        if (1 == quoted)
1.83      schwarze  434:                mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
1.36      schwarze  435:
1.71      schwarze  436:        /* NUL-terminate this argument and move to the next one. */
1.36      schwarze  437:        if (pairs)
                    438:                cp[-pairs] = '\0';
                    439:        if ('\0' != *cp) {
                    440:                *cp++ = '\0';
                    441:                while (' ' == *cp)
                    442:                        cp++;
                    443:        }
1.39      kristaps  444:        *pos += (int)(cp - start) + (quoted ? 1 : 0);
1.36      schwarze  445:        *cpp = cp;
                    446:
1.48      kristaps  447:        if ('\0' == *cp && (white || ' ' == cp[-1]))
1.83      schwarze  448:                mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
1.36      schwarze  449:
1.94      schwarze  450:        return start;
1.4       kristaps  451: }
1.7       kristaps  452:
                    453: static int
                    454: a2time(time_t *t, const char *fmt, const char *p)
                    455: {
                    456:        struct tm        tm;
                    457:        char            *pp;
                    458:
                    459:        memset(&tm, 0, sizeof(struct tm));
                    460:
1.56      kristaps  461:        pp = NULL;
1.85      schwarze  462: #if HAVE_STRPTIME
1.7       kristaps  463:        pp = strptime(p, fmt, &tm);
1.56      kristaps  464: #endif
1.7       kristaps  465:        if (NULL != pp && '\0' == *pp) {
                    466:                *t = mktime(&tm);
1.94      schwarze  467:                return 1;
1.7       kristaps  468:        }
                    469:
1.94      schwarze  470:        return 0;
1.7       kristaps  471: }
                    472:
1.37      schwarze  473: static char *
                    474: time2a(time_t t)
                    475: {
1.56      kristaps  476:        struct tm       *tm;
1.38      schwarze  477:        char            *buf, *p;
                    478:        size_t           ssz;
1.37      schwarze  479:        int              isz;
                    480:
1.56      kristaps  481:        tm = localtime(&t);
1.89      schwarze  482:        if (tm == NULL)
1.94      schwarze  483:                return NULL;
1.37      schwarze  484:
1.38      schwarze  485:        /*
                    486:         * Reserve space:
                    487:         * up to 9 characters for the month (September) + blank
                    488:         * up to 2 characters for the day + comma + blank
                    489:         * 4 characters for the year and a terminating '\0'
                    490:         */
1.98      schwarze  491:
1.38      schwarze  492:        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
                    493:
1.98      schwarze  494:        if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0)
1.38      schwarze  495:                goto fail;
                    496:        p += (int)ssz;
1.37      schwarze  497:
1.98      schwarze  498:        /*
                    499:         * The output format is just "%d" here, not "%2d" or "%02d".
                    500:         * That's also the reason why we can't just format the
                    501:         * date as a whole with "%B %e, %Y" or "%B %d, %Y".
                    502:         * Besides, the present approach is less prone to buffer
                    503:         * overflows, in case anybody should ever introduce the bug
                    504:         * of looking at LC_TIME.
                    505:         */
                    506:
                    507:        if ((isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)) == -1)
1.38      schwarze  508:                goto fail;
1.37      schwarze  509:        p += isz;
                    510:
1.98      schwarze  511:        if (strftime(p, 4 + 1, "%Y", tm) == 0)
1.38      schwarze  512:                goto fail;
1.94      schwarze  513:        return buf;
1.38      schwarze  514:
                    515: fail:
                    516:        free(buf);
1.94      schwarze  517:        return NULL;
1.37      schwarze  518: }
                    519:
                    520: char *
1.42      kristaps  521: mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
1.7       kristaps  522: {
                    523:        time_t           t;
                    524:
1.98      schwarze  525:        /* No date specified: use today's date. */
                    526:
                    527:        if (in == NULL || *in == '\0' || strcmp(in, "$" "Mdocdate$") == 0) {
1.80      schwarze  528:                mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
1.98      schwarze  529:                return time2a(time(NULL));
1.37      schwarze  530:        }
1.98      schwarze  531:
                    532:        /* Valid mdoc(7) date format. */
                    533:
                    534:        if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) ||
                    535:            a2time(&t, "%b %d, %Y", in))
                    536:                return time2a(t);
                    537:
                    538:        /* Do not warn about the legacy man(7) format. */
                    539:
                    540:        if ( ! a2time(&t, "%Y-%m-%d", in))
1.81      schwarze  541:                mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
1.98      schwarze  542:
                    543:        /* Use any non-mdoc(7) date verbatim. */
                    544:
                    545:        return mandoc_strdup(in);
1.7       kristaps  546: }
                    547:
1.12      kristaps  548: int
1.75      schwarze  549: mandoc_eos(const char *p, size_t sz)
1.12      kristaps  550: {
1.75      schwarze  551:        const char      *q;
                    552:        int              enclosed, found;
1.12      kristaps  553:
1.13      kristaps  554:        if (0 == sz)
1.94      schwarze  555:                return 0;
1.12      kristaps  556:
1.14      kristaps  557:        /*
                    558:         * End-of-sentence recognition must include situations where
                    559:         * some symbols, such as `)', allow prior EOS punctuation to
1.49      kristaps  560:         * propagate outward.
1.14      kristaps  561:         */
                    562:
1.75      schwarze  563:        enclosed = found = 0;
1.25      kristaps  564:        for (q = p + (int)sz - 1; q >= p; q--) {
1.23      schwarze  565:                switch (*q) {
1.79      schwarze  566:                case '\"':
                    567:                case '\'':
                    568:                case ']':
                    569:                case ')':
1.23      schwarze  570:                        if (0 == found)
                    571:                                enclosed = 1;
1.14      kristaps  572:                        break;
1.79      schwarze  573:                case '.':
                    574:                case '!':
                    575:                case '?':
1.23      schwarze  576:                        found = 1;
                    577:                        break;
1.14      kristaps  578:                default:
1.94      schwarze  579:                        return found &&
                    580:                            (!enclosed || isalnum((unsigned char)*q));
1.14      kristaps  581:                }
1.12      kristaps  582:        }
                    583:
1.94      schwarze  584:        return found && !enclosed;
1.44      kristaps  585: }
1.50      kristaps  586:
                    587: /*
                    588:  * Convert a string to a long that may not be <0.
                    589:  * If the string is invalid, or is less than 0, return -1.
                    590:  */
                    591: int
1.54      kristaps  592: mandoc_strntoi(const char *p, size_t sz, int base)
1.50      kristaps  593: {
                    594:        char             buf[32];
                    595:        char            *ep;
                    596:        long             v;
                    597:
                    598:        if (sz > 31)
1.94      schwarze  599:                return -1;
1.50      kristaps  600:
                    601:        memcpy(buf, p, sz);
1.51      kristaps  602:        buf[(int)sz] = '\0';
1.50      kristaps  603:
                    604:        errno = 0;
                    605:        v = strtol(buf, &ep, base);
                    606:
                    607:        if (buf[0] == '\0' || *ep != '\0')
1.94      schwarze  608:                return -1;
1.50      kristaps  609:
1.54      kristaps  610:        if (v > INT_MAX)
                    611:                v = INT_MAX;
                    612:        if (v < INT_MIN)
                    613:                v = INT_MIN;
1.50      kristaps  614:
1.94      schwarze  615:        return (int)v;
1.50      kristaps  616: }

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