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Annotation of mandoc/term.c, Revision 1.129

1.129   ! kristaps    1: /*     $Id: term.c,v 1.128 2010/01/01 17:14:30 kristaps 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:
1.101     kristaps   30: #include "chars.h"
1.107     kristaps   31: #include "out.h"
1.71      kristaps   32: #include "term.h"
                     33: #include "man.h"
                     34: #include "mdoc.h"
1.105     kristaps   35: #include "main.h"
1.1       kristaps   36:
1.71      kristaps   37: static struct termp     *term_alloc(enum termenc);
                     38: static void              term_free(struct termp *);
1.125     kristaps   39: static void              spec(struct termp *, const char *, size_t);
                     40: static void              res(struct termp *, const char *, size_t);
                     41: static void              buffera(struct termp *, const char *, size_t);
                     42: static void              bufferc(struct termp *, char);
                     43: static void              adjbuf(struct termp *p, size_t);
                     44: static void              encode(struct termp *, const char *, size_t);
1.1       kristaps   45:
                     46:
1.71      kristaps   47: void *
                     48: ascii_alloc(void)
1.10      kristaps   49: {
1.1       kristaps   50:
1.71      kristaps   51:        return(term_alloc(TERMENC_ASCII));
1.1       kristaps   52: }
                     53:
                     54:
1.99      kristaps   55: void
1.71      kristaps   56: terminal_free(void *arg)
1.11      kristaps   57: {
                     58:
1.71      kristaps   59:        term_free((struct termp *)arg);
1.11      kristaps   60: }
                     61:
                     62:
1.71      kristaps   63: static void
                     64: term_free(struct termp *p)
1.14      kristaps   65: {
                     66:
1.71      kristaps   67:        if (p->buf)
                     68:                free(p->buf);
1.102     kristaps   69:        if (p->symtab)
1.101     kristaps   70:                chars_free(p->symtab);
1.14      kristaps   71:
1.71      kristaps   72:        free(p);
1.14      kristaps   73: }
                     74:
                     75:
1.71      kristaps   76: static struct termp *
                     77: term_alloc(enum termenc enc)
1.14      kristaps   78: {
1.71      kristaps   79:        struct termp *p;
1.14      kristaps   80:
1.117     kristaps   81:        p = calloc(1, sizeof(struct termp));
                     82:        if (NULL == p) {
1.120     kristaps   83:                perror(NULL);
1.117     kristaps   84:                exit(EXIT_FAILURE);
                     85:        }
1.71      kristaps   86:        p->enc = enc;
                     87:        return(p);
1.14      kristaps   88: }
                     89:
                     90:
1.71      kristaps   91: /*
                     92:  * Flush a line of text.  A "line" is loosely defined as being something
                     93:  * that should be followed by a newline, regardless of whether it's
                     94:  * broken apart by newlines getting there.  A line can also be a
                     95:  * fragment of a columnar list.
                     96:  *
                     97:  * Specifically, a line is whatever's in p->buf of length p->col, which
                     98:  * is zeroed after this function returns.
                     99:  *
1.84      kristaps  100:  * The usage of termp:flags is as follows:
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 */
                    134:        size_t           vsz;   /* visual characters to write to output */
                    135:        size_t           bp;    /* visual right border position */
                    136:        int              j;     /* temporary loop index */
                    137:        size_t           maxvis, mmax;
1.53      kristaps  138:
1.71      kristaps  139:        /*
                    140:         * First, establish the maximum columns of "visible" content.
                    141:         * This is usually the difference between the right-margin and
                    142:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  143:         * small set of values.
1.71      kristaps  144:         */
1.53      kristaps  145:
1.71      kristaps  146:        assert(p->offset < p->rmargin);
1.92      kristaps  147:
1.129   ! kristaps  148:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  149:                /* LINTED */
1.129   ! kristaps  150:                0 : p->rmargin - p->offset - p->overstep;
        !           151:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  152:                /* LINTED */
1.129   ! kristaps  153:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  154:
1.71      kristaps  155:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  156:
                    157:        /*
                    158:         * FIXME: if bp is zero, we still output the first word before
                    159:         * breaking the line.
                    160:         */
                    161:
1.71      kristaps  162:        vis = 0;
1.84      kristaps  163:
1.71      kristaps  164:        /*
                    165:         * If in the standard case (left-justified), then begin with our
                    166:         * indentation, otherwise (columns, etc.) just start spitting
                    167:         * out text.
                    168:         */
1.53      kristaps  169:
1.71      kristaps  170:        if ( ! (p->flags & TERMP_NOLPAD))
                    171:                /* LINTED */
                    172:                for (j = 0; j < (int)p->offset; j++)
                    173:                        putchar(' ');
                    174:
                    175:        for (i = 0; i < (int)p->col; i++) {
                    176:                /*
                    177:                 * Count up visible word characters.  Control sequences
                    178:                 * (starting with the CSI) aren't counted.  A space
                    179:                 * generates a non-printing word, which is valid (the
                    180:                 * space is printed according to regular spacing rules).
                    181:                 */
                    182:
                    183:                /* LINTED */
                    184:                for (j = i, vsz = 0; j < (int)p->col; j++) {
1.93      kristaps  185:                        if (j && ' ' == p->buf[j])
1.71      kristaps  186:                                break;
                    187:                        else if (8 == p->buf[j])
1.89      kristaps  188:                                vsz--;
1.71      kristaps  189:                        else
                    190:                                vsz++;
                    191:                }
1.53      kristaps  192:
1.71      kristaps  193:                /*
1.81      kristaps  194:                 * Choose the number of blanks to prepend: no blank at the
                    195:                 * beginning of a line, one between words -- but do not
                    196:                 * actually write them yet.
1.71      kristaps  197:                 */
1.81      kristaps  198:                vbl = (size_t)(0 == vis ? 0 : 1);
1.71      kristaps  199:
1.81      kristaps  200:                /*
                    201:                 * Find out whether we would exceed the right margin.
                    202:                 * If so, break to the next line.  (TODO: hyphenate)
                    203:                 * Otherwise, write the chosen number of blanks now.
                    204:                 */
                    205:                if (vis && vis + vbl + vsz > bp) {
                    206:                        putchar('\n');
                    207:                        if (TERMP_NOBREAK & p->flags) {
                    208:                                for (j = 0; j < (int)p->rmargin; j++)
                    209:                                        putchar(' ');
                    210:                                vis = p->rmargin - p->offset;
                    211:                        } else {
1.71      kristaps  212:                                for (j = 0; j < (int)p->offset; j++)
                    213:                                        putchar(' ');
                    214:                                vis = 0;
1.81      kristaps  215:                        }
1.129   ! kristaps  216:                        /* Remove the p->overstep width. */
1.112     kristaps  217:                        bp += (int)/* LINTED */
1.129   ! kristaps  218:                                p->overstep;
        !           219:                        p->overstep = 0;
1.81      kristaps  220:                } else {
                    221:                        for (j = 0; j < (int)vbl; j++)
1.71      kristaps  222:                                putchar(' ');
1.81      kristaps  223:                        vis += vbl;
1.71      kristaps  224:                }
1.53      kristaps  225:
1.78      kristaps  226:                /*
1.81      kristaps  227:                 * Finally, write out the word.
1.71      kristaps  228:                 */
                    229:                for ( ; i < (int)p->col; i++) {
                    230:                        if (' ' == p->buf[i])
                    231:                                break;
1.121     kristaps  232:
                    233:                        /* The unit sep. is a non-breaking space. */
                    234:                        if (31 == p->buf[i])
                    235:                                putchar(' ');
                    236:                        else
                    237:                                putchar(p->buf[i]);
1.71      kristaps  238:                }
                    239:                vis += vsz;
                    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:                        /* FALLTHROUGH */
                    444:                case('}'):
                    445:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    446:                                p->flags |= TERMP_NOSPACE;
                    447:                        break;
                    448:                default:
                    449:                        break;
                    450:                }
1.65      kristaps  451:
1.71      kristaps  452:        if ( ! (TERMP_NOSPACE & p->flags))
1.125     kristaps  453:                bufferc(p, ' ');
1.65      kristaps  454:
1.71      kristaps  455:        if ( ! (p->flags & TERMP_NONOSPACE))
                    456:                p->flags &= ~TERMP_NOSPACE;
1.65      kristaps  457:
1.125     kristaps  458:        /* FIXME: use strcspn. */
1.124     kristaps  459:
                    460:        while (*word) {
                    461:                if ('\\' != *word) {
1.125     kristaps  462:                        encode(p, word, 1);
1.124     kristaps  463:                        word++;
                    464:                        continue;
                    465:                }
                    466:
                    467:                seq = ++word;
                    468:                sz = a2roffdeco(&deco, &seq, &ssz);
                    469:
                    470:                switch (deco) {
                    471:                case (DECO_RESERVED):
1.125     kristaps  472:                        res(p, seq, ssz);
1.124     kristaps  473:                        break;
                    474:                case (DECO_SPECIAL):
1.125     kristaps  475:                        spec(p, seq, ssz);
1.124     kristaps  476:                        break;
                    477:                case (DECO_BOLD):
1.125     kristaps  478:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  479:                        break;
                    480:                case (DECO_ITALIC):
1.125     kristaps  481:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  482:                        break;
                    483:                case (DECO_ROMAN):
1.125     kristaps  484:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  485:                        break;
                    486:                case (DECO_PREVIOUS):
1.125     kristaps  487:                        term_fontlast(p);
1.124     kristaps  488:                        break;
                    489:                default:
                    490:                        break;
                    491:                }
1.127     kristaps  492:
1.124     kristaps  493:                word += sz;
1.127     kristaps  494:                if (DECO_NOSPACE == deco && '\0' == *word)
                    495:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  496:        }
1.65      kristaps  497:
1.100     kristaps  498:        if (sv[0] && 0 == sv[1])
                    499:                switch (sv[0]) {
                    500:                case('('):
                    501:                        /* FALLTHROUGH */
                    502:                case('['):
                    503:                        /* FALLTHROUGH */
                    504:                case('{'):
                    505:                        p->flags |= TERMP_NOSPACE;
                    506:                        break;
                    507:                default:
                    508:                        break;
                    509:                }
1.65      kristaps  510: }
                    511:
                    512:
1.71      kristaps  513: static void
1.125     kristaps  514: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  515: {
                    516:
1.125     kristaps  517:        if (0 == p->maxcols)
                    518:                p->maxcols = 1024;
                    519:        while (sz >= p->maxcols)
                    520:                p->maxcols <<= 2;
                    521:
                    522:        p->buf = realloc(p->buf, p->maxcols);
                    523:        if (NULL == p->buf) {
                    524:                perror(NULL);
                    525:                exit(EXIT_FAILURE);
1.71      kristaps  526:        }
1.51      kristaps  527: }
                    528:
1.79      kristaps  529:
                    530: static void
1.125     kristaps  531: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  532: {
1.125     kristaps  533:
                    534:        if (p->col + sz >= p->maxcols)
                    535:                adjbuf(p, p->col + sz);
                    536:
1.126     kristaps  537:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  538:        p->col += sz;
                    539: }
                    540:
                    541:
                    542: static void
                    543: bufferc(struct termp *p, char c)
                    544: {
                    545:
                    546:        if (p->col + 1 >= p->maxcols)
                    547:                adjbuf(p, p->col + 1);
                    548:
1.126     kristaps  549:        p->buf[(int)p->col++] = c;
1.125     kristaps  550: }
                    551:
                    552:
                    553: static void
                    554: encode(struct termp *p, const char *word, size_t sz)
                    555: {
                    556:        enum termfont     f;
                    557:        int               i;
                    558:
                    559:        /*
                    560:         * Encode and buffer a string of characters.  If the current
                    561:         * font mode is unset, buffer directly, else encode then buffer
                    562:         * character by character.
                    563:         */
                    564:
                    565:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
                    566:                buffera(p, word, sz);
                    567:                return;
                    568:        }
                    569:
                    570:        for (i = 0; i < (int)sz; i++) {
                    571:                if ( ! isgraph((u_char)word[i])) {
                    572:                        bufferc(p, word[i]);
                    573:                        continue;
1.79      kristaps  574:                }
1.125     kristaps  575:
                    576:                if (TERMFONT_UNDER == f)
                    577:                        bufferc(p, '_');
                    578:                else
                    579:                        bufferc(p, word[i]);
                    580:
                    581:                bufferc(p, 8);
                    582:                bufferc(p, word[i]);
1.79      kristaps  583:        }
                    584: }
1.106     kristaps  585:
                    586:
1.107     kristaps  587: size_t
                    588: term_vspan(const struct roffsu *su)
1.106     kristaps  589: {
                    590:        double           r;
                    591:
1.107     kristaps  592:        switch (su->unit) {
1.106     kristaps  593:        case (SCALE_CM):
1.107     kristaps  594:                r = su->scale * 2;
1.106     kristaps  595:                break;
                    596:        case (SCALE_IN):
1.107     kristaps  597:                r = su->scale * 6;
1.106     kristaps  598:                break;
                    599:        case (SCALE_PC):
1.107     kristaps  600:                r = su->scale;
1.106     kristaps  601:                break;
                    602:        case (SCALE_PT):
1.107     kristaps  603:                r = su->scale / 8;
1.106     kristaps  604:                break;
                    605:        case (SCALE_MM):
1.107     kristaps  606:                r = su->scale / 1000;
1.106     kristaps  607:                break;
                    608:        case (SCALE_VS):
1.107     kristaps  609:                r = su->scale;
1.106     kristaps  610:                break;
                    611:        default:
1.107     kristaps  612:                r = su->scale - 1;
1.106     kristaps  613:                break;
                    614:        }
                    615:
                    616:        if (r < 0.0)
                    617:                r = 0.0;
1.107     kristaps  618:        return(/* LINTED */(size_t)
1.106     kristaps  619:                        r);
                    620: }
                    621:
                    622:
1.107     kristaps  623: size_t
                    624: term_hspan(const struct roffsu *su)
1.106     kristaps  625: {
                    626:        double           r;
                    627:
1.108     kristaps  628:        /* XXX: CM, IN, and PT are approximations. */
                    629:
1.107     kristaps  630:        switch (su->unit) {
1.106     kristaps  631:        case (SCALE_CM):
1.108     kristaps  632:                r = 4 * su->scale;
1.106     kristaps  633:                break;
                    634:        case (SCALE_IN):
1.108     kristaps  635:                /* XXX: this is an approximation. */
                    636:                r = 10 * su->scale;
1.106     kristaps  637:                break;
                    638:        case (SCALE_PC):
1.108     kristaps  639:                r = (10 * su->scale) / 6;
1.106     kristaps  640:                break;
                    641:        case (SCALE_PT):
1.108     kristaps  642:                r = (10 * su->scale) / 72;
1.106     kristaps  643:                break;
                    644:        case (SCALE_MM):
1.107     kristaps  645:                r = su->scale / 1000; /* FIXME: double-check. */
1.106     kristaps  646:                break;
                    647:        case (SCALE_VS):
1.107     kristaps  648:                r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106     kristaps  649:                break;
                    650:        default:
1.107     kristaps  651:                r = su->scale;
1.106     kristaps  652:                break;
                    653:        }
                    654:
                    655:        if (r < 0.0)
                    656:                r = 0.0;
1.107     kristaps  657:        return((size_t)/* LINTED */
1.106     kristaps  658:                        r);
                    659: }
                    660:
                    661:

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