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Annotation of mandoc/term.c, Revision 1.157

1.157   ! kristaps    1: /*     $Id: term.c,v 1.156 2010/06/30 12:30:36 kristaps Exp $ */
1.1       kristaps    2: /*
1.148     kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.1       kristaps    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
1.74      kristaps    6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    8:  *
1.74      kristaps    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   16:  */
1.128     kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.126     kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
1.122     kristaps   24: #include <ctype.h>
1.141     kristaps   25: #include <stdint.h>
1.22      kristaps   26: #include <stdio.h>
1.1       kristaps   27: #include <stdlib.h>
                     28: #include <string.h>
                     29:
1.137     kristaps   30: #include "mandoc.h"
1.101     kristaps   31: #include "chars.h"
1.107     kristaps   32: #include "out.h"
1.71      kristaps   33: #include "term.h"
1.105     kristaps   34: #include "main.h"
1.1       kristaps   35:
1.125     kristaps   36: static void              spec(struct termp *, const char *, size_t);
                     37: static void              res(struct termp *, const char *, size_t);
                     38: static void              buffera(struct termp *, const char *, size_t);
                     39: static void              bufferc(struct termp *, char);
                     40: static void              adjbuf(struct termp *p, size_t);
                     41: static void              encode(struct termp *, const char *, size_t);
1.11      kristaps   42:
                     43:
1.145     kristaps   44: void
1.71      kristaps   45: term_free(struct termp *p)
1.14      kristaps   46: {
                     47:
1.71      kristaps   48:        if (p->buf)
                     49:                free(p->buf);
1.102     kristaps   50:        if (p->symtab)
1.101     kristaps   51:                chars_free(p->symtab);
1.145     kristaps   52:
1.142     kristaps   53:        free(p);
                     54: }
                     55:
                     56:
                     57: void
                     58: term_begin(struct termp *p, term_margin head,
                     59:                term_margin foot, const void *arg)
                     60: {
                     61:
                     62:        p->headf = head;
                     63:        p->footf = foot;
                     64:        p->argf = arg;
1.146     kristaps   65:        (*p->begin)(p);
1.142     kristaps   66: }
                     67:
                     68:
                     69: void
                     70: term_end(struct termp *p)
                     71: {
                     72:
1.146     kristaps   73:        (*p->end)(p);
1.14      kristaps   74: }
                     75:
                     76:
1.145     kristaps   77: struct termp *
                     78: term_alloc(enum termenc enc)
1.14      kristaps   79: {
1.141     kristaps   80:        struct termp    *p;
1.14      kristaps   81:
1.117     kristaps   82:        p = calloc(1, sizeof(struct termp));
                     83:        if (NULL == p) {
1.120     kristaps   84:                perror(NULL);
1.117     kristaps   85:                exit(EXIT_FAILURE);
                     86:        }
1.141     kristaps   87:
1.71      kristaps   88:        p->enc = enc;
                     89:        return(p);
1.14      kristaps   90: }
                     91:
                     92:
1.71      kristaps   93: /*
                     94:  * Flush a line of text.  A "line" is loosely defined as being something
                     95:  * that should be followed by a newline, regardless of whether it's
                     96:  * broken apart by newlines getting there.  A line can also be a
1.130     kristaps   97:  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
                     98:  * not have a trailing newline.
1.71      kristaps   99:  *
1.130     kristaps  100:  * The following flags may be specified:
1.71      kristaps  101:  *
                    102:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    103:  *    offset value.  This is useful when doing columnar lists where the
                    104:  *    prior column has right-padded.
                    105:  *
                    106:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    107:  *    columns.  In short: don't print a newline and instead pad to the
                    108:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    109:  *
1.91      kristaps  110:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    111:  *    space characters of padding.  Otherwise, rather break the line.
                    112:  *
1.84      kristaps  113:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    114:  *    the line is overrun, and don't pad-right if it's underrun.
                    115:  *
                    116:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    117:  *    overruning, instead save the position and continue at that point
                    118:  *    when the next invocation.
1.71      kristaps  119:  *
                    120:  *  In-line line breaking:
                    121:  *
                    122:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    123:  *  margin, it will break and pad-right to the right margin after
                    124:  *  writing.  If maxrmargin is violated, it will break and continue
1.114     kristaps  125:  *  writing from the right-margin, which will lead to the above scenario
                    126:  *  upon exit.  Otherwise, the line will break at the right margin.
1.71      kristaps  127:  */
                    128: void
                    129: term_flushln(struct termp *p)
1.53      kristaps  130: {
1.114     kristaps  131:        int              i;     /* current input position in p->buf */
                    132:        size_t           vis;   /* current visual position on output */
                    133:        size_t           vbl;   /* number of blanks to prepend to output */
1.136     schwarze  134:        size_t           vend;  /* end of word visual position on output */
1.114     kristaps  135:        size_t           bp;    /* visual right border position */
1.152     kristaps  136:        int              j;     /* temporary loop index for p->buf */
                    137:        int              jhy;   /* last hyph before overflow w/r/t j */
                    138:        size_t           maxvis; /* output position of visible boundary */
                    139:        size_t           mmax; /* used in calculating bp */
1.53      kristaps  140:
1.71      kristaps  141:        /*
                    142:         * First, establish the maximum columns of "visible" content.
                    143:         * This is usually the difference between the right-margin and
                    144:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  145:         * small set of values.
1.71      kristaps  146:         */
1.53      kristaps  147:
1.71      kristaps  148:        assert(p->offset < p->rmargin);
1.92      kristaps  149:
1.129     kristaps  150:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  151:                /* LINTED */
1.129     kristaps  152:                0 : p->rmargin - p->offset - p->overstep;
                    153:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  154:                /* LINTED */
1.129     kristaps  155:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  156:
1.71      kristaps  157:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  158:
1.136     schwarze  159:        /*
                    160:         * Indent the first line of a paragraph.
                    161:         */
                    162:        vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
                    163:
1.154     kristaps  164:        vis = vend = i = 0;
1.115     kristaps  165:
1.136     schwarze  166:        while (i < (int)p->col) {
1.71      kristaps  167:                /*
1.154     kristaps  168:                 * Handle literal tab characters: collapse all
                    169:                 * subsequent tabs into a single huge set of spaces.
1.138     schwarze  170:                 */
                    171:                for (j = i; j < (int)p->col; j++) {
                    172:                        if ('\t' != p->buf[j])
                    173:                                break;
1.154     kristaps  174:                        vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138     schwarze  175:                        vbl += vend - vis;
                    176:                        vis = vend;
                    177:                }
                    178:
                    179:                /*
1.71      kristaps  180:                 * Count up visible word characters.  Control sequences
                    181:                 * (starting with the CSI) aren't counted.  A space
                    182:                 * generates a non-printing word, which is valid (the
                    183:                 * space is printed according to regular spacing rules).
                    184:                 */
                    185:
                    186:                /* LINTED */
1.140     kristaps  187:                for (jhy = 0; j < (int)p->col; j++) {
1.138     schwarze  188:                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71      kristaps  189:                                break;
1.154     kristaps  190:
                    191:                        /* Back over the the last printed character. */
                    192:                        if (8 == p->buf[j]) {
1.153     kristaps  193:                                assert(j);
                    194:                                vend -= (*p->width)(p, p->buf[j - 1]);
1.154     kristaps  195:                                continue;
1.153     kristaps  196:                        }
1.154     kristaps  197:
                    198:                        /* Regular word. */
                    199:                        /* Break at the hyphen point if we overrun. */
                    200:                        if (vend > vis && vend < bp &&
                    201:                                        ASCII_HYPH == p->buf[j])
                    202:                                jhy = j;
                    203:
                    204:                        vend += (*p->width)(p, p->buf[j]);
1.71      kristaps  205:                }
1.53      kristaps  206:
1.71      kristaps  207:                /*
1.81      kristaps  208:                 * Find out whether we would exceed the right margin.
1.136     schwarze  209:                 * If so, break to the next line.
1.81      kristaps  210:                 */
1.140     kristaps  211:                if (vend > bp && 0 == jhy && vis > 0) {
1.136     schwarze  212:                        vend -= vis;
1.146     kristaps  213:                        (*p->endline)(p);
1.81      kristaps  214:                        if (TERMP_NOBREAK & p->flags) {
1.139     schwarze  215:                                p->viscol = p->rmargin;
1.146     kristaps  216:                                (*p->advance)(p, p->rmargin);
1.136     schwarze  217:                                vend += p->rmargin - p->offset;
1.81      kristaps  218:                        } else {
1.139     schwarze  219:                                p->viscol = 0;
1.136     schwarze  220:                                vbl = p->offset;
1.81      kristaps  221:                        }
1.130     kristaps  222:
1.129     kristaps  223:                        /* Remove the p->overstep width. */
1.130     kristaps  224:
1.112     kristaps  225:                        bp += (int)/* LINTED */
1.129     kristaps  226:                                p->overstep;
                    227:                        p->overstep = 0;
1.71      kristaps  228:                }
1.53      kristaps  229:
1.138     schwarze  230:                /*
                    231:                 * Skip leading tabs, they were handled above.
                    232:                 */
                    233:                while (i < (int)p->col && '\t' == p->buf[i])
                    234:                        i++;
                    235:
1.130     kristaps  236:                /* Write out the [remaining] word. */
1.136     schwarze  237:                for ( ; i < (int)p->col; i++) {
1.140     kristaps  238:                        if (vend > bp && jhy > 0 && i > jhy)
                    239:                                break;
1.138     schwarze  240:                        if ('\t' == p->buf[i])
                    241:                                break;
1.136     schwarze  242:                        if (' ' == p->buf[i]) {
                    243:                                while (' ' == p->buf[i]) {
1.153     kristaps  244:                                        vbl += (*p->width)(p, p->buf[i]);
1.136     schwarze  245:                                        i++;
                    246:                                }
1.71      kristaps  247:                                break;
1.136     schwarze  248:                        }
                    249:                        if (ASCII_NBRSP == p->buf[i]) {
1.153     kristaps  250:                                vbl += (*p->width)(p, ' ');
1.136     schwarze  251:                                continue;
                    252:                        }
1.130     kristaps  253:
1.136     schwarze  254:                        /*
                    255:                         * Now we definitely know there will be
                    256:                         * printable characters to output,
                    257:                         * so write preceding white space now.
                    258:                         */
                    259:                        if (vbl) {
1.146     kristaps  260:                                (*p->advance)(p, vbl);
1.139     schwarze  261:                                p->viscol += vbl;
1.136     schwarze  262:                                vbl = 0;
                    263:                        }
1.140     kristaps  264:
1.153     kristaps  265:                        if (ASCII_HYPH == p->buf[i]) {
1.146     kristaps  266:                                (*p->letter)(p, '-');
1.153     kristaps  267:                                p->viscol += (*p->width)(p, '-');
                    268:                        } else {
1.146     kristaps  269:                                (*p->letter)(p, p->buf[i]);
1.153     kristaps  270:                                p->viscol += (*p->width)(p, p->buf[i]);
                    271:                        }
1.136     schwarze  272:                }
                    273:                vend += vbl;
                    274:                vis = vend;
1.71      kristaps  275:        }
1.111     kristaps  276:
1.91      kristaps  277:        p->col = 0;
1.129     kristaps  278:        p->overstep = 0;
1.15      kristaps  279:
1.91      kristaps  280:        if ( ! (TERMP_NOBREAK & p->flags)) {
1.139     schwarze  281:                p->viscol = 0;
1.146     kristaps  282:                (*p->endline)(p);
1.15      kristaps  283:                return;
1.71      kristaps  284:        }
1.15      kristaps  285:
1.91      kristaps  286:        if (TERMP_HANG & p->flags) {
                    287:                /* We need one blank after the tag. */
1.129     kristaps  288:                p->overstep = /* LINTED */
1.153     kristaps  289:                        vis - maxvis + (*p->width)(p, ' ');
1.91      kristaps  290:
                    291:                /*
                    292:                 * Behave exactly the same way as groff:
1.92      kristaps  293:                 * If we have overstepped the margin, temporarily move
                    294:                 * it to the right and flag the rest of the line to be
                    295:                 * shorter.
1.91      kristaps  296:                 * If we landed right at the margin, be happy.
1.92      kristaps  297:                 * If we are one step before the margin, temporarily
                    298:                 * move it one step LEFT and flag the rest of the line
                    299:                 * to be longer.
1.91      kristaps  300:                 */
1.129     kristaps  301:                if (p->overstep >= -1) {
                    302:                        assert((int)maxvis + p->overstep >= 0);
1.92      kristaps  303:                        /* LINTED */
1.129     kristaps  304:                        maxvis += p->overstep;
1.92      kristaps  305:                } else
1.129     kristaps  306:                        p->overstep = 0;
1.91      kristaps  307:
                    308:        } else if (TERMP_DANGLE & p->flags)
                    309:                return;
1.15      kristaps  310:
1.92      kristaps  311:        /* Right-pad. */
                    312:        if (maxvis > vis + /* LINTED */
1.154     kristaps  313:                        ((TERMP_TWOSPACE & p->flags) ?
                    314:                         (*p->width)(p, ' ') : 0)) {
1.139     schwarze  315:                p->viscol += maxvis - vis;
1.146     kristaps  316:                (*p->advance)(p, maxvis - vis);
1.142     kristaps  317:                vis += (maxvis - vis);
1.139     schwarze  318:        } else {        /* ...or newline break. */
1.146     kristaps  319:                (*p->endline)(p);
1.139     schwarze  320:                p->viscol = p->rmargin;
1.146     kristaps  321:                (*p->advance)(p, p->rmargin);
1.91      kristaps  322:        }
1.15      kristaps  323: }
                    324:
                    325:
1.71      kristaps  326: /*
                    327:  * A newline only breaks an existing line; it won't assert vertical
                    328:  * space.  All data in the output buffer is flushed prior to the newline
                    329:  * assertion.
                    330:  */
                    331: void
                    332: term_newln(struct termp *p)
1.15      kristaps  333: {
                    334:
1.71      kristaps  335:        p->flags |= TERMP_NOSPACE;
1.139     schwarze  336:        if (0 == p->col && 0 == p->viscol) {
1.71      kristaps  337:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  338:                return;
1.16      kristaps  339:        }
1.71      kristaps  340:        term_flushln(p);
                    341:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  342: }
                    343:
                    344:
1.71      kristaps  345: /*
                    346:  * Asserts a vertical space (a full, empty line-break between lines).
                    347:  * Note that if used twice, this will cause two blank spaces and so on.
                    348:  * All data in the output buffer is flushed prior to the newline
                    349:  * assertion.
                    350:  */
                    351: void
                    352: term_vspace(struct termp *p)
1.16      kristaps  353: {
                    354:
1.62      kristaps  355:        term_newln(p);
1.139     schwarze  356:        p->viscol = 0;
1.146     kristaps  357:        (*p->endline)(p);
1.16      kristaps  358: }
                    359:
                    360:
1.71      kristaps  361: static void
1.125     kristaps  362: spec(struct termp *p, const char *word, size_t len)
1.17      kristaps  363: {
1.71      kristaps  364:        const char      *rhs;
                    365:        size_t           sz;
1.17      kristaps  366:
1.101     kristaps  367:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125     kristaps  368:        if (rhs)
                    369:                encode(p, rhs, sz);
1.94      kristaps  370: }
                    371:
                    372:
                    373: static void
1.125     kristaps  374: res(struct termp *p, const char *word, size_t len)
1.94      kristaps  375: {
                    376:        const char      *rhs;
                    377:        size_t           sz;
                    378:
1.101     kristaps  379:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.125     kristaps  380:        if (rhs)
                    381:                encode(p, rhs, sz);
                    382: }
                    383:
                    384:
                    385: void
                    386: term_fontlast(struct termp *p)
                    387: {
                    388:        enum termfont    f;
                    389:
                    390:        f = p->fontl;
                    391:        p->fontl = p->fontq[p->fonti];
                    392:        p->fontq[p->fonti] = f;
                    393: }
                    394:
                    395:
                    396: void
                    397: term_fontrepl(struct termp *p, enum termfont f)
                    398: {
                    399:
                    400:        p->fontl = p->fontq[p->fonti];
                    401:        p->fontq[p->fonti] = f;
                    402: }
                    403:
                    404:
                    405: void
                    406: term_fontpush(struct termp *p, enum termfont f)
                    407: {
                    408:
                    409:        assert(p->fonti + 1 < 10);
                    410:        p->fontl = p->fontq[p->fonti];
                    411:        p->fontq[++p->fonti] = f;
                    412: }
                    413:
                    414:
                    415: const void *
                    416: term_fontq(struct termp *p)
                    417: {
                    418:
                    419:        return(&p->fontq[p->fonti]);
                    420: }
                    421:
                    422:
                    423: enum termfont
                    424: term_fonttop(struct termp *p)
                    425: {
                    426:
                    427:        return(p->fontq[p->fonti]);
                    428: }
                    429:
                    430:
                    431: void
                    432: term_fontpopq(struct termp *p, const void *key)
                    433: {
                    434:
                    435:        while (p->fonti >= 0 && key != &p->fontq[p->fonti])
                    436:                p->fonti--;
                    437:        assert(p->fonti >= 0);
                    438: }
1.94      kristaps  439:
1.125     kristaps  440:
                    441: void
                    442: term_fontpop(struct termp *p)
                    443: {
                    444:
                    445:        assert(p->fonti);
                    446:        p->fonti--;
1.17      kristaps  447: }
                    448:
                    449:
1.71      kristaps  450: /*
                    451:  * Handle pwords, partial words, which may be either a single word or a
                    452:  * phrase that cannot be broken down (such as a literal string).  This
                    453:  * handles word styling.
                    454:  */
1.86      kristaps  455: void
                    456: term_word(struct termp *p, const char *word)
1.65      kristaps  457: {
1.124     kristaps  458:        const char      *sv, *seq;
1.125     kristaps  459:        int              sz;
1.124     kristaps  460:        size_t           ssz;
                    461:        enum roffdeco    deco;
1.71      kristaps  462:
1.100     kristaps  463:        sv = word;
                    464:
1.123     kristaps  465:        if (word[0] && '\0' == word[1])
1.100     kristaps  466:                switch (word[0]) {
                    467:                case('.'):
                    468:                        /* FALLTHROUGH */
                    469:                case(','):
                    470:                        /* FALLTHROUGH */
                    471:                case(';'):
                    472:                        /* FALLTHROUGH */
                    473:                case(':'):
                    474:                        /* FALLTHROUGH */
                    475:                case('?'):
                    476:                        /* FALLTHROUGH */
                    477:                case('!'):
                    478:                        /* FALLTHROUGH */
                    479:                case(')'):
                    480:                        /* FALLTHROUGH */
                    481:                case(']'):
                    482:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    483:                                p->flags |= TERMP_NOSPACE;
                    484:                        break;
                    485:                default:
                    486:                        break;
                    487:                }
1.65      kristaps  488:
1.133     kristaps  489:        if ( ! (TERMP_NOSPACE & p->flags)) {
1.151     schwarze  490:                if ( ! (TERMP_KEEP & p->flags)) {
                    491:                        if (TERMP_PREKEEP & p->flags)
                    492:                                p->flags |= TERMP_KEEP;
1.133     kristaps  493:                        bufferc(p, ' ');
1.151     schwarze  494:                        if (TERMP_SENTENCE & p->flags)
                    495:                                bufferc(p, ' ');
                    496:                } else
                    497:                        bufferc(p, ASCII_NBRSP);
1.133     kristaps  498:        }
1.65      kristaps  499:
1.71      kristaps  500:        if ( ! (p->flags & TERMP_NONOSPACE))
                    501:                p->flags &= ~TERMP_NOSPACE;
1.133     kristaps  502:
                    503:        p->flags &= ~TERMP_SENTENCE;
1.65      kristaps  504:
1.125     kristaps  505:        /* FIXME: use strcspn. */
1.124     kristaps  506:
                    507:        while (*word) {
                    508:                if ('\\' != *word) {
1.125     kristaps  509:                        encode(p, word, 1);
1.124     kristaps  510:                        word++;
                    511:                        continue;
                    512:                }
                    513:
                    514:                seq = ++word;
                    515:                sz = a2roffdeco(&deco, &seq, &ssz);
                    516:
                    517:                switch (deco) {
                    518:                case (DECO_RESERVED):
1.125     kristaps  519:                        res(p, seq, ssz);
1.124     kristaps  520:                        break;
                    521:                case (DECO_SPECIAL):
1.125     kristaps  522:                        spec(p, seq, ssz);
1.124     kristaps  523:                        break;
                    524:                case (DECO_BOLD):
1.125     kristaps  525:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  526:                        break;
                    527:                case (DECO_ITALIC):
1.125     kristaps  528:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  529:                        break;
                    530:                case (DECO_ROMAN):
1.125     kristaps  531:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  532:                        break;
                    533:                case (DECO_PREVIOUS):
1.125     kristaps  534:                        term_fontlast(p);
1.124     kristaps  535:                        break;
                    536:                default:
                    537:                        break;
                    538:                }
1.127     kristaps  539:
1.124     kristaps  540:                word += sz;
1.127     kristaps  541:                if (DECO_NOSPACE == deco && '\0' == *word)
                    542:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  543:        }
1.65      kristaps  544:
1.131     kristaps  545:        /*
                    546:         * Note that we don't process the pipe: the parser sees it as
                    547:         * punctuation, but we don't in terms of typography.
                    548:         */
1.100     kristaps  549:        if (sv[0] && 0 == sv[1])
                    550:                switch (sv[0]) {
                    551:                case('('):
                    552:                        /* FALLTHROUGH */
                    553:                case('['):
                    554:                        p->flags |= TERMP_NOSPACE;
                    555:                        break;
                    556:                default:
                    557:                        break;
                    558:                }
1.65      kristaps  559: }
                    560:
                    561:
1.71      kristaps  562: static void
1.125     kristaps  563: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  564: {
                    565:
1.125     kristaps  566:        if (0 == p->maxcols)
                    567:                p->maxcols = 1024;
                    568:        while (sz >= p->maxcols)
                    569:                p->maxcols <<= 2;
                    570:
                    571:        p->buf = realloc(p->buf, p->maxcols);
                    572:        if (NULL == p->buf) {
                    573:                perror(NULL);
                    574:                exit(EXIT_FAILURE);
1.71      kristaps  575:        }
1.51      kristaps  576: }
                    577:
1.79      kristaps  578:
                    579: static void
1.125     kristaps  580: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  581: {
1.125     kristaps  582:
                    583:        if (p->col + sz >= p->maxcols)
                    584:                adjbuf(p, p->col + sz);
                    585:
1.126     kristaps  586:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  587:        p->col += sz;
                    588: }
                    589:
                    590:
                    591: static void
                    592: bufferc(struct termp *p, char c)
                    593: {
                    594:
                    595:        if (p->col + 1 >= p->maxcols)
                    596:                adjbuf(p, p->col + 1);
                    597:
1.126     kristaps  598:        p->buf[(int)p->col++] = c;
1.125     kristaps  599: }
                    600:
                    601:
                    602: static void
                    603: encode(struct termp *p, const char *word, size_t sz)
                    604: {
                    605:        enum termfont     f;
                    606:        int               i;
                    607:
                    608:        /*
                    609:         * Encode and buffer a string of characters.  If the current
                    610:         * font mode is unset, buffer directly, else encode then buffer
                    611:         * character by character.
                    612:         */
                    613:
1.147     kristaps  614:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125     kristaps  615:                buffera(p, word, sz);
                    616:                return;
                    617:        }
                    618:
                    619:        for (i = 0; i < (int)sz; i++) {
                    620:                if ( ! isgraph((u_char)word[i])) {
                    621:                        bufferc(p, word[i]);
                    622:                        continue;
1.79      kristaps  623:                }
1.125     kristaps  624:
                    625:                if (TERMFONT_UNDER == f)
                    626:                        bufferc(p, '_');
                    627:                else
                    628:                        bufferc(p, word[i]);
                    629:
                    630:                bufferc(p, 8);
                    631:                bufferc(p, word[i]);
1.79      kristaps  632:        }
                    633: }
1.106     kristaps  634:
                    635:
1.107     kristaps  636: size_t
1.149     kristaps  637: term_len(const struct termp *p, size_t sz)
                    638: {
                    639:
                    640:        return((*p->width)(p, ' ') * sz);
                    641: }
                    642:
                    643:
                    644: size_t
                    645: term_strlen(const struct termp *p, const char *cp)
                    646: {
                    647:        size_t           sz;
                    648:
                    649:        for (sz = 0; *cp; cp++)
                    650:                sz += (*p->width)(p, *cp);
                    651:
                    652:        return(sz);
                    653: }
                    654:
                    655:
1.157   ! kristaps  656: /* ARGSUSED */
1.149     kristaps  657: size_t
                    658: term_vspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  659: {
                    660:        double           r;
                    661:
1.107     kristaps  662:        switch (su->unit) {
1.106     kristaps  663:        case (SCALE_CM):
1.107     kristaps  664:                r = su->scale * 2;
1.106     kristaps  665:                break;
                    666:        case (SCALE_IN):
1.107     kristaps  667:                r = su->scale * 6;
1.106     kristaps  668:                break;
                    669:        case (SCALE_PC):
1.107     kristaps  670:                r = su->scale;
1.106     kristaps  671:                break;
                    672:        case (SCALE_PT):
1.107     kristaps  673:                r = su->scale / 8;
1.106     kristaps  674:                break;
                    675:        case (SCALE_MM):
1.107     kristaps  676:                r = su->scale / 1000;
1.106     kristaps  677:                break;
                    678:        case (SCALE_VS):
1.107     kristaps  679:                r = su->scale;
1.106     kristaps  680:                break;
                    681:        default:
1.107     kristaps  682:                r = su->scale - 1;
1.106     kristaps  683:                break;
                    684:        }
                    685:
                    686:        if (r < 0.0)
                    687:                r = 0.0;
1.107     kristaps  688:        return(/* LINTED */(size_t)
1.106     kristaps  689:                        r);
                    690: }
                    691:
                    692:
1.107     kristaps  693: size_t
1.149     kristaps  694: term_hspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  695: {
1.156     kristaps  696:        double           v;
1.108     kristaps  697:
1.156     kristaps  698:        v = ((*p->hspan)(p, su));
                    699:        if (v < 0.0)
                    700:                v = 0.0;
                    701:        return((size_t) /* LINTED */
                    702:                        v);
1.106     kristaps  703: }

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