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Annotation of mandoc/term.c, Revision 1.137

1.137   ! kristaps    1: /*     $Id: term.c,v 1.136 2010/05/17 02:03:49 schwarze Exp $ */
1.1       kristaps    2: /*
1.75      kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
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>
1.22      kristaps   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
                     27: #include <string.h>
1.113     kristaps   28: #include <time.h>
1.1       kristaps   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"
                     34: #include "man.h"
                     35: #include "mdoc.h"
1.105     kristaps   36: #include "main.h"
1.1       kristaps   37:
1.134     joerg      38: static struct termp     *term_alloc(enum termenc, size_t);
1.71      kristaps   39: static void              term_free(struct termp *);
1.125     kristaps   40: static void              spec(struct termp *, const char *, size_t);
                     41: static void              res(struct termp *, const char *, size_t);
                     42: static void              buffera(struct termp *, const char *, size_t);
                     43: static void              bufferc(struct termp *, char);
                     44: static void              adjbuf(struct termp *p, size_t);
                     45: static void              encode(struct termp *, const char *, size_t);
1.1       kristaps   46:
                     47:
1.71      kristaps   48: void *
1.134     joerg      49: ascii_alloc(size_t width)
1.10      kristaps   50: {
1.1       kristaps   51:
1.134     joerg      52:        return(term_alloc(TERMENC_ASCII, width));
1.1       kristaps   53: }
                     54:
                     55:
1.99      kristaps   56: void
1.71      kristaps   57: terminal_free(void *arg)
1.11      kristaps   58: {
                     59:
1.71      kristaps   60:        term_free((struct termp *)arg);
1.11      kristaps   61: }
                     62:
                     63:
1.71      kristaps   64: static void
                     65: term_free(struct termp *p)
1.14      kristaps   66: {
                     67:
1.71      kristaps   68:        if (p->buf)
                     69:                free(p->buf);
1.102     kristaps   70:        if (p->symtab)
1.101     kristaps   71:                chars_free(p->symtab);
1.14      kristaps   72:
1.71      kristaps   73:        free(p);
1.14      kristaps   74: }
                     75:
                     76:
1.71      kristaps   77: static struct termp *
1.134     joerg      78: term_alloc(enum termenc enc, size_t width)
1.14      kristaps   79: {
1.71      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:        }
1.71      kristaps   87:        p->enc = enc;
1.134     joerg      88:        /* Enforce some lower boundary. */
                     89:        if (width < 60)
                     90:                width = 60;
                     91:        p->defrmargin = width - 2;
1.71      kristaps   92:        return(p);
1.14      kristaps   93: }
                     94:
                     95:
1.71      kristaps   96: /*
                     97:  * Flush a line of text.  A "line" is loosely defined as being something
                     98:  * that should be followed by a newline, regardless of whether it's
                     99:  * broken apart by newlines getting there.  A line can also be a
1.130     kristaps  100:  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
                    101:  * not have a trailing newline.
1.71      kristaps  102:  *
1.130     kristaps  103:  * The following flags may be specified:
1.71      kristaps  104:  *
                    105:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    106:  *    offset value.  This is useful when doing columnar lists where the
                    107:  *    prior column has right-padded.
                    108:  *
                    109:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    110:  *    columns.  In short: don't print a newline and instead pad to the
                    111:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    112:  *
1.91      kristaps  113:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    114:  *    space characters of padding.  Otherwise, rather break the line.
                    115:  *
1.84      kristaps  116:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    117:  *    the line is overrun, and don't pad-right if it's underrun.
                    118:  *
                    119:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    120:  *    overruning, instead save the position and continue at that point
                    121:  *    when the next invocation.
1.71      kristaps  122:  *
                    123:  *  In-line line breaking:
                    124:  *
                    125:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    126:  *  margin, it will break and pad-right to the right margin after
                    127:  *  writing.  If maxrmargin is violated, it will break and continue
1.114     kristaps  128:  *  writing from the right-margin, which will lead to the above scenario
                    129:  *  upon exit.  Otherwise, the line will break at the right margin.
1.71      kristaps  130:  */
                    131: void
                    132: term_flushln(struct termp *p)
1.53      kristaps  133: {
1.114     kristaps  134:        int              i;     /* current input position in p->buf */
                    135:        size_t           vis;   /* current visual position on output */
                    136:        size_t           vbl;   /* number of blanks to prepend to output */
1.136     schwarze  137:        size_t           vend;  /* end of word visual position on output */
1.114     kristaps  138:        size_t           bp;    /* visual right border position */
                    139:        int              j;     /* temporary loop index */
                    140:        size_t           maxvis, mmax;
1.53      kristaps  141:
1.71      kristaps  142:        /*
                    143:         * First, establish the maximum columns of "visible" content.
                    144:         * This is usually the difference between the right-margin and
                    145:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  146:         * small set of values.
1.71      kristaps  147:         */
1.53      kristaps  148:
1.71      kristaps  149:        assert(p->offset < p->rmargin);
1.92      kristaps  150:
1.129     kristaps  151:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  152:                /* LINTED */
1.129     kristaps  153:                0 : p->rmargin - p->offset - p->overstep;
                    154:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  155:                /* LINTED */
1.129     kristaps  156:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  157:
1.71      kristaps  158:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  159:
1.136     schwarze  160:        /*
                    161:         * Indent the first line of a paragraph.
                    162:         */
                    163:        vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
                    164:
1.115     kristaps  165:        /*
                    166:         * FIXME: if bp is zero, we still output the first word before
                    167:         * breaking the line.
                    168:         */
                    169:
1.136     schwarze  170:        vis = vend = i = 0;
                    171:        while (i < (int)p->col) {
1.71      kristaps  172:
                    173:                /*
                    174:                 * Count up visible word characters.  Control sequences
                    175:                 * (starting with the CSI) aren't counted.  A space
                    176:                 * generates a non-printing word, which is valid (the
                    177:                 * space is printed according to regular spacing rules).
                    178:                 */
                    179:
                    180:                /* LINTED */
1.136     schwarze  181:                for (j = i; j < (int)p->col; j++) {
1.93      kristaps  182:                        if (j && ' ' == p->buf[j])
1.71      kristaps  183:                                break;
1.130     kristaps  184:                        if (8 == p->buf[j])
1.136     schwarze  185:                                vend--;
1.71      kristaps  186:                        else
1.136     schwarze  187:                                vend++;
1.71      kristaps  188:                }
1.53      kristaps  189:
1.71      kristaps  190:                /*
1.81      kristaps  191:                 * Find out whether we would exceed the right margin.
1.136     schwarze  192:                 * If so, break to the next line.
1.81      kristaps  193:                 */
1.136     schwarze  194:                if (vend > bp && vis > 0) {
                    195:                        vend -= vis;
1.81      kristaps  196:                        putchar('\n');
                    197:                        if (TERMP_NOBREAK & p->flags) {
                    198:                                for (j = 0; j < (int)p->rmargin; j++)
                    199:                                        putchar(' ');
1.136     schwarze  200:                                vend += p->rmargin - p->offset;
1.81      kristaps  201:                        } else {
1.136     schwarze  202:                                vbl = p->offset;
1.81      kristaps  203:                        }
1.130     kristaps  204:
1.129     kristaps  205:                        /* Remove the p->overstep width. */
1.130     kristaps  206:
1.112     kristaps  207:                        bp += (int)/* LINTED */
1.129     kristaps  208:                                p->overstep;
                    209:                        p->overstep = 0;
1.71      kristaps  210:                }
1.53      kristaps  211:
1.130     kristaps  212:                /* Write out the [remaining] word. */
1.136     schwarze  213:                for ( ; i < (int)p->col; i++) {
                    214:                        if (' ' == p->buf[i]) {
                    215:                                while (' ' == p->buf[i]) {
                    216:                                        vbl++;
                    217:                                        i++;
                    218:                                }
1.71      kristaps  219:                                break;
1.136     schwarze  220:                        }
                    221:                        if (ASCII_NBRSP == p->buf[i]) {
                    222:                                vbl++;
                    223:                                continue;
                    224:                        }
1.130     kristaps  225:
1.136     schwarze  226:                        /*
                    227:                         * Now we definitely know there will be
                    228:                         * printable characters to output,
                    229:                         * so write preceding white space now.
                    230:                         */
                    231:                        if (vbl) {
                    232:                                for (j = 0; j < (int)vbl; j++)
                    233:                                        putchar(' ');
                    234:                                vbl = 0;
                    235:                        }
                    236:                        putchar(p->buf[i]);
                    237:                }
                    238:                vend += vbl;
                    239:                vis = vend;
1.71      kristaps  240:        }
1.111     kristaps  241:
1.91      kristaps  242:        p->col = 0;
1.129     kristaps  243:        p->overstep = 0;
1.15      kristaps  244:
1.91      kristaps  245:        if ( ! (TERMP_NOBREAK & p->flags)) {
                    246:                putchar('\n');
1.15      kristaps  247:                return;
1.71      kristaps  248:        }
1.15      kristaps  249:
1.91      kristaps  250:        if (TERMP_HANG & p->flags) {
                    251:                /* We need one blank after the tag. */
1.129     kristaps  252:                p->overstep = /* LINTED */
1.92      kristaps  253:                        vis - maxvis + 1;
1.91      kristaps  254:
                    255:                /*
                    256:                 * Behave exactly the same way as groff:
1.92      kristaps  257:                 * If we have overstepped the margin, temporarily move
                    258:                 * it to the right and flag the rest of the line to be
                    259:                 * shorter.
1.91      kristaps  260:                 * If we landed right at the margin, be happy.
1.92      kristaps  261:                 * If we are one step before the margin, temporarily
                    262:                 * move it one step LEFT and flag the rest of the line
                    263:                 * to be longer.
1.91      kristaps  264:                 */
1.129     kristaps  265:                if (p->overstep >= -1) {
                    266:                        assert((int)maxvis + p->overstep >= 0);
1.92      kristaps  267:                        /* LINTED */
1.129     kristaps  268:                        maxvis += p->overstep;
1.92      kristaps  269:                } else
1.129     kristaps  270:                        p->overstep = 0;
1.91      kristaps  271:
                    272:        } else if (TERMP_DANGLE & p->flags)
                    273:                return;
1.15      kristaps  274:
1.92      kristaps  275:        /* Right-pad. */
                    276:        if (maxvis > vis + /* LINTED */
                    277:                        ((TERMP_TWOSPACE & p->flags) ? 1 : 0))
1.91      kristaps  278:                for ( ; vis < maxvis; vis++)
                    279:                        putchar(' ');
1.92      kristaps  280:        else {  /* ...or newline break. */
1.71      kristaps  281:                putchar('\n');
1.91      kristaps  282:                for (i = 0; i < (int)p->rmargin; i++)
                    283:                        putchar(' ');
                    284:        }
1.15      kristaps  285: }
                    286:
                    287:
1.71      kristaps  288: /*
                    289:  * A newline only breaks an existing line; it won't assert vertical
                    290:  * space.  All data in the output buffer is flushed prior to the newline
                    291:  * assertion.
                    292:  */
                    293: void
                    294: term_newln(struct termp *p)
1.15      kristaps  295: {
                    296:
1.71      kristaps  297:        p->flags |= TERMP_NOSPACE;
                    298:        if (0 == p->col) {
                    299:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  300:                return;
1.16      kristaps  301:        }
1.71      kristaps  302:        term_flushln(p);
                    303:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  304: }
                    305:
                    306:
1.71      kristaps  307: /*
                    308:  * Asserts a vertical space (a full, empty line-break between lines).
                    309:  * Note that if used twice, this will cause two blank spaces and so on.
                    310:  * All data in the output buffer is flushed prior to the newline
                    311:  * assertion.
                    312:  */
                    313: void
                    314: term_vspace(struct termp *p)
1.16      kristaps  315: {
                    316:
1.62      kristaps  317:        term_newln(p);
1.71      kristaps  318:        putchar('\n');
1.16      kristaps  319: }
                    320:
                    321:
1.71      kristaps  322: static void
1.125     kristaps  323: spec(struct termp *p, const char *word, size_t len)
1.17      kristaps  324: {
1.71      kristaps  325:        const char      *rhs;
                    326:        size_t           sz;
1.17      kristaps  327:
1.101     kristaps  328:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125     kristaps  329:        if (rhs)
                    330:                encode(p, rhs, sz);
1.94      kristaps  331: }
                    332:
                    333:
                    334: static void
1.125     kristaps  335: res(struct termp *p, const char *word, size_t len)
1.94      kristaps  336: {
                    337:        const char      *rhs;
                    338:        size_t           sz;
                    339:
1.101     kristaps  340:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.125     kristaps  341:        if (rhs)
                    342:                encode(p, rhs, sz);
                    343: }
                    344:
                    345:
                    346: void
                    347: term_fontlast(struct termp *p)
                    348: {
                    349:        enum termfont    f;
                    350:
                    351:        f = p->fontl;
                    352:        p->fontl = p->fontq[p->fonti];
                    353:        p->fontq[p->fonti] = f;
                    354: }
                    355:
                    356:
                    357: void
                    358: term_fontrepl(struct termp *p, enum termfont f)
                    359: {
                    360:
                    361:        p->fontl = p->fontq[p->fonti];
                    362:        p->fontq[p->fonti] = f;
                    363: }
                    364:
                    365:
                    366: void
                    367: term_fontpush(struct termp *p, enum termfont f)
                    368: {
                    369:
                    370:        assert(p->fonti + 1 < 10);
                    371:        p->fontl = p->fontq[p->fonti];
                    372:        p->fontq[++p->fonti] = f;
                    373: }
                    374:
                    375:
                    376: const void *
                    377: term_fontq(struct termp *p)
                    378: {
                    379:
                    380:        return(&p->fontq[p->fonti]);
                    381: }
                    382:
                    383:
                    384: enum termfont
                    385: term_fonttop(struct termp *p)
                    386: {
                    387:
                    388:        return(p->fontq[p->fonti]);
                    389: }
                    390:
                    391:
                    392: void
                    393: term_fontpopq(struct termp *p, const void *key)
                    394: {
                    395:
                    396:        while (p->fonti >= 0 && key != &p->fontq[p->fonti])
                    397:                p->fonti--;
                    398:        assert(p->fonti >= 0);
                    399: }
1.94      kristaps  400:
1.125     kristaps  401:
                    402: void
                    403: term_fontpop(struct termp *p)
                    404: {
                    405:
                    406:        assert(p->fonti);
                    407:        p->fonti--;
1.17      kristaps  408: }
                    409:
                    410:
1.71      kristaps  411: /*
                    412:  * Handle pwords, partial words, which may be either a single word or a
                    413:  * phrase that cannot be broken down (such as a literal string).  This
                    414:  * handles word styling.
                    415:  */
1.86      kristaps  416: void
                    417: term_word(struct termp *p, const char *word)
1.65      kristaps  418: {
1.124     kristaps  419:        const char      *sv, *seq;
1.125     kristaps  420:        int              sz;
1.124     kristaps  421:        size_t           ssz;
                    422:        enum roffdeco    deco;
1.71      kristaps  423:
1.100     kristaps  424:        sv = word;
                    425:
1.123     kristaps  426:        if (word[0] && '\0' == word[1])
1.100     kristaps  427:                switch (word[0]) {
                    428:                case('.'):
                    429:                        /* FALLTHROUGH */
                    430:                case(','):
                    431:                        /* FALLTHROUGH */
                    432:                case(';'):
                    433:                        /* FALLTHROUGH */
                    434:                case(':'):
                    435:                        /* FALLTHROUGH */
                    436:                case('?'):
                    437:                        /* FALLTHROUGH */
                    438:                case('!'):
                    439:                        /* FALLTHROUGH */
                    440:                case(')'):
                    441:                        /* FALLTHROUGH */
                    442:                case(']'):
                    443:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    444:                                p->flags |= TERMP_NOSPACE;
                    445:                        break;
                    446:                default:
                    447:                        break;
                    448:                }
1.65      kristaps  449:
1.133     kristaps  450:        if ( ! (TERMP_NOSPACE & p->flags)) {
1.125     kristaps  451:                bufferc(p, ' ');
1.133     kristaps  452:                if (TERMP_SENTENCE & p->flags)
                    453:                        bufferc(p, ' ');
                    454:        }
1.65      kristaps  455:
1.71      kristaps  456:        if ( ! (p->flags & TERMP_NONOSPACE))
                    457:                p->flags &= ~TERMP_NOSPACE;
1.133     kristaps  458:
                    459:        p->flags &= ~TERMP_SENTENCE;
1.65      kristaps  460:
1.125     kristaps  461:        /* FIXME: use strcspn. */
1.124     kristaps  462:
                    463:        while (*word) {
                    464:                if ('\\' != *word) {
1.125     kristaps  465:                        encode(p, word, 1);
1.124     kristaps  466:                        word++;
                    467:                        continue;
                    468:                }
                    469:
                    470:                seq = ++word;
                    471:                sz = a2roffdeco(&deco, &seq, &ssz);
                    472:
                    473:                switch (deco) {
                    474:                case (DECO_RESERVED):
1.125     kristaps  475:                        res(p, seq, ssz);
1.124     kristaps  476:                        break;
                    477:                case (DECO_SPECIAL):
1.125     kristaps  478:                        spec(p, seq, ssz);
1.124     kristaps  479:                        break;
                    480:                case (DECO_BOLD):
1.125     kristaps  481:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  482:                        break;
                    483:                case (DECO_ITALIC):
1.125     kristaps  484:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  485:                        break;
                    486:                case (DECO_ROMAN):
1.125     kristaps  487:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  488:                        break;
                    489:                case (DECO_PREVIOUS):
1.125     kristaps  490:                        term_fontlast(p);
1.124     kristaps  491:                        break;
                    492:                default:
                    493:                        break;
                    494:                }
1.127     kristaps  495:
1.124     kristaps  496:                word += sz;
1.127     kristaps  497:                if (DECO_NOSPACE == deco && '\0' == *word)
                    498:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  499:        }
1.65      kristaps  500:
1.131     kristaps  501:        /*
                    502:         * Note that we don't process the pipe: the parser sees it as
                    503:         * punctuation, but we don't in terms of typography.
                    504:         */
1.100     kristaps  505:        if (sv[0] && 0 == sv[1])
                    506:                switch (sv[0]) {
                    507:                case('('):
                    508:                        /* FALLTHROUGH */
                    509:                case('['):
                    510:                        p->flags |= TERMP_NOSPACE;
                    511:                        break;
                    512:                default:
                    513:                        break;
                    514:                }
1.65      kristaps  515: }
                    516:
                    517:
1.71      kristaps  518: static void
1.125     kristaps  519: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  520: {
                    521:
1.125     kristaps  522:        if (0 == p->maxcols)
                    523:                p->maxcols = 1024;
                    524:        while (sz >= p->maxcols)
                    525:                p->maxcols <<= 2;
                    526:
                    527:        p->buf = realloc(p->buf, p->maxcols);
                    528:        if (NULL == p->buf) {
                    529:                perror(NULL);
                    530:                exit(EXIT_FAILURE);
1.71      kristaps  531:        }
1.51      kristaps  532: }
                    533:
1.79      kristaps  534:
                    535: static void
1.125     kristaps  536: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  537: {
1.125     kristaps  538:
                    539:        if (p->col + sz >= p->maxcols)
                    540:                adjbuf(p, p->col + sz);
                    541:
1.126     kristaps  542:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  543:        p->col += sz;
                    544: }
                    545:
                    546:
                    547: static void
                    548: bufferc(struct termp *p, char c)
                    549: {
                    550:
                    551:        if (p->col + 1 >= p->maxcols)
                    552:                adjbuf(p, p->col + 1);
                    553:
1.126     kristaps  554:        p->buf[(int)p->col++] = c;
1.125     kristaps  555: }
                    556:
                    557:
                    558: static void
                    559: encode(struct termp *p, const char *word, size_t sz)
                    560: {
                    561:        enum termfont     f;
                    562:        int               i;
                    563:
                    564:        /*
                    565:         * Encode and buffer a string of characters.  If the current
                    566:         * font mode is unset, buffer directly, else encode then buffer
                    567:         * character by character.
                    568:         */
                    569:
                    570:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
                    571:                buffera(p, word, sz);
                    572:                return;
                    573:        }
                    574:
                    575:        for (i = 0; i < (int)sz; i++) {
                    576:                if ( ! isgraph((u_char)word[i])) {
                    577:                        bufferc(p, word[i]);
                    578:                        continue;
1.79      kristaps  579:                }
1.125     kristaps  580:
                    581:                if (TERMFONT_UNDER == f)
                    582:                        bufferc(p, '_');
                    583:                else
                    584:                        bufferc(p, word[i]);
                    585:
                    586:                bufferc(p, 8);
                    587:                bufferc(p, word[i]);
1.79      kristaps  588:        }
                    589: }
1.106     kristaps  590:
                    591:
1.107     kristaps  592: size_t
                    593: term_vspan(const struct roffsu *su)
1.106     kristaps  594: {
                    595:        double           r;
                    596:
1.107     kristaps  597:        switch (su->unit) {
1.106     kristaps  598:        case (SCALE_CM):
1.107     kristaps  599:                r = su->scale * 2;
1.106     kristaps  600:                break;
                    601:        case (SCALE_IN):
1.107     kristaps  602:                r = su->scale * 6;
1.106     kristaps  603:                break;
                    604:        case (SCALE_PC):
1.107     kristaps  605:                r = su->scale;
1.106     kristaps  606:                break;
                    607:        case (SCALE_PT):
1.107     kristaps  608:                r = su->scale / 8;
1.106     kristaps  609:                break;
                    610:        case (SCALE_MM):
1.107     kristaps  611:                r = su->scale / 1000;
1.106     kristaps  612:                break;
                    613:        case (SCALE_VS):
1.107     kristaps  614:                r = su->scale;
1.106     kristaps  615:                break;
                    616:        default:
1.107     kristaps  617:                r = su->scale - 1;
1.106     kristaps  618:                break;
                    619:        }
                    620:
                    621:        if (r < 0.0)
                    622:                r = 0.0;
1.107     kristaps  623:        return(/* LINTED */(size_t)
1.106     kristaps  624:                        r);
                    625: }
                    626:
                    627:
1.107     kristaps  628: size_t
                    629: term_hspan(const struct roffsu *su)
1.106     kristaps  630: {
                    631:        double           r;
                    632:
1.108     kristaps  633:        /* XXX: CM, IN, and PT are approximations. */
                    634:
1.107     kristaps  635:        switch (su->unit) {
1.106     kristaps  636:        case (SCALE_CM):
1.108     kristaps  637:                r = 4 * su->scale;
1.106     kristaps  638:                break;
                    639:        case (SCALE_IN):
1.108     kristaps  640:                /* XXX: this is an approximation. */
                    641:                r = 10 * su->scale;
1.106     kristaps  642:                break;
                    643:        case (SCALE_PC):
1.108     kristaps  644:                r = (10 * su->scale) / 6;
1.106     kristaps  645:                break;
                    646:        case (SCALE_PT):
1.108     kristaps  647:                r = (10 * su->scale) / 72;
1.106     kristaps  648:                break;
                    649:        case (SCALE_MM):
1.107     kristaps  650:                r = su->scale / 1000; /* FIXME: double-check. */
1.106     kristaps  651:                break;
                    652:        case (SCALE_VS):
1.107     kristaps  653:                r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106     kristaps  654:                break;
                    655:        default:
1.107     kristaps  656:                r = su->scale;
1.106     kristaps  657:                break;
                    658:        }
                    659:
                    660:        if (r < 0.0)
                    661:                r = 0.0;
1.107     kristaps  662:        return((size_t)/* LINTED */
1.106     kristaps  663:                        r);
                    664: }
                    665:
                    666:

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