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Annotation of mandoc/term.c, Revision 1.107

1.107   ! kristaps    1: /*     $Id: term.c,v 1.106 2009/10/18 13:34:17 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:  */
                     17: #include <assert.h>
1.23      kristaps   18: #include <err.h>
1.22      kristaps   19: #include <stdio.h>
1.1       kristaps   20: #include <stdlib.h>
                     21: #include <string.h>
                     22:
1.101     kristaps   23: #include "chars.h"
1.107   ! kristaps   24: #include "out.h"
1.71      kristaps   25: #include "term.h"
                     26: #include "man.h"
                     27: #include "mdoc.h"
1.105     kristaps   28: #include "main.h"
1.1       kristaps   29:
1.103     kristaps   30: /* FIXME: accomodate non-breaking, non-collapsing white-space. */
                     31: /* FIXME: accomodate non-breaking, collapsing white-space. */
                     32:
1.71      kristaps   33: static struct termp     *term_alloc(enum termenc);
                     34: static void              term_free(struct termp *);
1.95      kristaps   35:
                     36: static void              do_escaped(struct termp *, const char **);
                     37: static void              do_special(struct termp *,
1.71      kristaps   38:                                const char *, size_t);
1.95      kristaps   39: static void              do_reserved(struct termp *,
1.94      kristaps   40:                                const char *, size_t);
1.95      kristaps   41: static void              buffer(struct termp *, char);
                     42: static void              encode(struct termp *, char);
1.1       kristaps   43:
                     44:
1.71      kristaps   45: void *
                     46: ascii_alloc(void)
1.10      kristaps   47: {
1.1       kristaps   48:
1.71      kristaps   49:        return(term_alloc(TERMENC_ASCII));
1.1       kristaps   50: }
                     51:
                     52:
1.99      kristaps   53: void
1.71      kristaps   54: terminal_free(void *arg)
1.11      kristaps   55: {
                     56:
1.71      kristaps   57:        term_free((struct termp *)arg);
1.11      kristaps   58: }
                     59:
                     60:
1.71      kristaps   61: static void
                     62: term_free(struct termp *p)
1.14      kristaps   63: {
                     64:
1.71      kristaps   65:        if (p->buf)
                     66:                free(p->buf);
1.102     kristaps   67:        if (p->symtab)
1.101     kristaps   68:                chars_free(p->symtab);
1.14      kristaps   69:
1.71      kristaps   70:        free(p);
1.14      kristaps   71: }
                     72:
                     73:
1.71      kristaps   74: static struct termp *
                     75: term_alloc(enum termenc enc)
1.14      kristaps   76: {
1.71      kristaps   77:        struct termp *p;
1.14      kristaps   78:
1.71      kristaps   79:        if (NULL == (p = malloc(sizeof(struct termp))))
1.98      kristaps   80:                return(NULL);
1.71      kristaps   81:        bzero(p, sizeof(struct termp));
1.80      kristaps   82:        p->maxrmargin = 78;
1.71      kristaps   83:        p->enc = enc;
                     84:        return(p);
1.14      kristaps   85: }
                     86:
                     87:
1.71      kristaps   88: /*
                     89:  * Flush a line of text.  A "line" is loosely defined as being something
                     90:  * that should be followed by a newline, regardless of whether it's
                     91:  * broken apart by newlines getting there.  A line can also be a
                     92:  * fragment of a columnar list.
                     93:  *
                     94:  * Specifically, a line is whatever's in p->buf of length p->col, which
                     95:  * is zeroed after this function returns.
                     96:  *
1.84      kristaps   97:  * The usage of termp:flags is as follows:
1.71      kristaps   98:  *
                     99:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    100:  *    offset value.  This is useful when doing columnar lists where the
                    101:  *    prior column has right-padded.
                    102:  *
                    103:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    104:  *    columns.  In short: don't print a newline and instead pad to the
                    105:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    106:  *
1.91      kristaps  107:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    108:  *    space characters of padding.  Otherwise, rather break the line.
                    109:  *
1.84      kristaps  110:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    111:  *    the line is overrun, and don't pad-right if it's underrun.
                    112:  *
                    113:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    114:  *    overruning, instead save the position and continue at that point
                    115:  *    when the next invocation.
1.71      kristaps  116:  *
                    117:  *  In-line line breaking:
                    118:  *
                    119:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    120:  *  margin, it will break and pad-right to the right margin after
                    121:  *  writing.  If maxrmargin is violated, it will break and continue
                    122:  *  writing from the right-margin, which will lead to the above
                    123:  *  scenario upon exit.
                    124:  *
                    125:  *  Otherwise, the line will break at the right margin.  Extremely long
                    126:  *  lines will cause the system to emit a warning (TODO: hyphenate, if
                    127:  *  possible).
                    128:  */
                    129: void
                    130: term_flushln(struct termp *p)
1.53      kristaps  131: {
1.71      kristaps  132:        int              i, j;
1.104     kristaps  133:        size_t           vbl, vsz, vis, maxvis, mmax, bp, os;
1.91      kristaps  134:        static int       overstep = 0;
1.53      kristaps  135:
1.71      kristaps  136:        /*
                    137:         * First, establish the maximum columns of "visible" content.
                    138:         * This is usually the difference between the right-margin and
                    139:         * an indentation, but can be, for tagged lists or columns, a
                    140:         * small set of values.
                    141:         */
1.53      kristaps  142:
1.71      kristaps  143:        assert(p->offset < p->rmargin);
1.92      kristaps  144:        assert((int)(p->rmargin - p->offset) - overstep > 0);
                    145:
1.104     kristaps  146:        /* Save the overstep. */
                    147:        os = (size_t)overstep;
                    148:
1.92      kristaps  149:        maxvis = /* LINTED */
                    150:                p->rmargin - p->offset - overstep;
                    151:        mmax = /* LINTED */
                    152:                p->maxrmargin - p->offset - overstep;
                    153:
1.71      kristaps  154:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
                    155:        vis = 0;
1.91      kristaps  156:        overstep = 0;
1.84      kristaps  157:
1.71      kristaps  158:        /*
                    159:         * If in the standard case (left-justified), then begin with our
                    160:         * indentation, otherwise (columns, etc.) just start spitting
                    161:         * out text.
                    162:         */
1.53      kristaps  163:
1.71      kristaps  164:        if ( ! (p->flags & TERMP_NOLPAD))
                    165:                /* LINTED */
                    166:                for (j = 0; j < (int)p->offset; j++)
                    167:                        putchar(' ');
                    168:
                    169:        for (i = 0; i < (int)p->col; i++) {
                    170:                /*
                    171:                 * Count up visible word characters.  Control sequences
                    172:                 * (starting with the CSI) aren't counted.  A space
                    173:                 * generates a non-printing word, which is valid (the
                    174:                 * space is printed according to regular spacing rules).
                    175:                 */
                    176:
                    177:                /* LINTED */
                    178:                for (j = i, vsz = 0; j < (int)p->col; j++) {
1.93      kristaps  179:                        if (j && ' ' == p->buf[j])
1.71      kristaps  180:                                break;
                    181:                        else if (8 == p->buf[j])
1.89      kristaps  182:                                vsz--;
1.71      kristaps  183:                        else
                    184:                                vsz++;
                    185:                }
1.53      kristaps  186:
1.71      kristaps  187:                /*
1.81      kristaps  188:                 * Choose the number of blanks to prepend: no blank at the
                    189:                 * beginning of a line, one between words -- but do not
                    190:                 * actually write them yet.
1.71      kristaps  191:                 */
1.81      kristaps  192:                vbl = (size_t)(0 == vis ? 0 : 1);
1.71      kristaps  193:
1.81      kristaps  194:                /*
                    195:                 * Find out whether we would exceed the right margin.
                    196:                 * If so, break to the next line.  (TODO: hyphenate)
                    197:                 * Otherwise, write the chosen number of blanks now.
                    198:                 */
                    199:                if (vis && vis + vbl + vsz > bp) {
                    200:                        putchar('\n');
                    201:                        if (TERMP_NOBREAK & p->flags) {
                    202:                                for (j = 0; j < (int)p->rmargin; j++)
                    203:                                        putchar(' ');
                    204:                                vis = p->rmargin - p->offset;
                    205:                        } else {
1.71      kristaps  206:                                for (j = 0; j < (int)p->offset; j++)
                    207:                                        putchar(' ');
                    208:                                vis = 0;
1.81      kristaps  209:                        }
1.104     kristaps  210:                        /* Remove the overstep width. */
                    211:                        bp += os;
                    212:                        os = 0;
1.81      kristaps  213:                } else {
                    214:                        for (j = 0; j < (int)vbl; j++)
1.71      kristaps  215:                                putchar(' ');
1.81      kristaps  216:                        vis += vbl;
1.71      kristaps  217:                }
1.53      kristaps  218:
1.78      kristaps  219:                /*
1.81      kristaps  220:                 * Finally, write out the word.
1.71      kristaps  221:                 */
                    222:                for ( ; i < (int)p->col; i++) {
                    223:                        if (' ' == p->buf[i])
                    224:                                break;
                    225:                        putchar(p->buf[i]);
                    226:                }
                    227:                vis += vsz;
                    228:        }
1.91      kristaps  229:        p->col = 0;
1.15      kristaps  230:
1.91      kristaps  231:        if ( ! (TERMP_NOBREAK & p->flags)) {
                    232:                putchar('\n');
1.15      kristaps  233:                return;
1.71      kristaps  234:        }
1.15      kristaps  235:
1.91      kristaps  236:        if (TERMP_HANG & p->flags) {
                    237:                /* We need one blank after the tag. */
1.92      kristaps  238:                overstep = /* LINTED */
                    239:                        vis - maxvis + 1;
1.91      kristaps  240:
                    241:                /*
                    242:                 * Behave exactly the same way as groff:
1.92      kristaps  243:                 * If we have overstepped the margin, temporarily move
                    244:                 * it to the right and flag the rest of the line to be
                    245:                 * shorter.
1.91      kristaps  246:                 * If we landed right at the margin, be happy.
1.92      kristaps  247:                 * If we are one step before the margin, temporarily
                    248:                 * move it one step LEFT and flag the rest of the line
                    249:                 * to be longer.
1.91      kristaps  250:                 */
1.92      kristaps  251:                if (overstep >= -1) {
                    252:                        assert((int)maxvis + overstep >= 0);
                    253:                        /* LINTED */
1.91      kristaps  254:                        maxvis += overstep;
1.92      kristaps  255:                } else
1.91      kristaps  256:                        overstep = 0;
                    257:
                    258:        } else if (TERMP_DANGLE & p->flags)
                    259:                return;
1.15      kristaps  260:
1.92      kristaps  261:        /* Right-pad. */
                    262:        if (maxvis > vis + /* LINTED */
                    263:                        ((TERMP_TWOSPACE & p->flags) ? 1 : 0))
1.91      kristaps  264:                for ( ; vis < maxvis; vis++)
                    265:                        putchar(' ');
1.92      kristaps  266:        else {  /* ...or newline break. */
1.71      kristaps  267:                putchar('\n');
1.91      kristaps  268:                for (i = 0; i < (int)p->rmargin; i++)
                    269:                        putchar(' ');
                    270:        }
1.15      kristaps  271: }
                    272:
                    273:
1.71      kristaps  274: /*
                    275:  * A newline only breaks an existing line; it won't assert vertical
                    276:  * space.  All data in the output buffer is flushed prior to the newline
                    277:  * assertion.
                    278:  */
                    279: void
                    280: term_newln(struct termp *p)
1.15      kristaps  281: {
                    282:
1.71      kristaps  283:        p->flags |= TERMP_NOSPACE;
                    284:        if (0 == p->col) {
                    285:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  286:                return;
1.16      kristaps  287:        }
1.71      kristaps  288:        term_flushln(p);
                    289:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  290: }
                    291:
                    292:
1.71      kristaps  293: /*
                    294:  * Asserts a vertical space (a full, empty line-break between lines).
                    295:  * Note that if used twice, this will cause two blank spaces and so on.
                    296:  * All data in the output buffer is flushed prior to the newline
                    297:  * assertion.
                    298:  */
                    299: void
                    300: term_vspace(struct termp *p)
1.16      kristaps  301: {
                    302:
1.62      kristaps  303:        term_newln(p);
1.71      kristaps  304:        putchar('\n');
1.16      kristaps  305: }
                    306:
                    307:
1.71      kristaps  308: static void
1.95      kristaps  309: do_special(struct termp *p, const char *word, size_t len)
1.17      kristaps  310: {
1.71      kristaps  311:        const char      *rhs;
                    312:        size_t           sz;
1.79      kristaps  313:        int              i;
1.17      kristaps  314:
1.101     kristaps  315:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.86      kristaps  316:
1.96      kristaps  317:        if (NULL == rhs) {
1.97      kristaps  318: #if 0
1.96      kristaps  319:                fputs("Unknown special character: ", stderr);
                    320:                for (i = 0; i < (int)len; i++)
                    321:                        fputc(word[i], stderr);
                    322:                fputc('\n', stderr);
                    323: #endif
1.94      kristaps  324:                return;
1.96      kristaps  325:        }
1.94      kristaps  326:        for (i = 0; i < (int)sz; i++)
1.95      kristaps  327:                encode(p, rhs[i]);
1.94      kristaps  328: }
                    329:
                    330:
                    331: static void
1.95      kristaps  332: do_reserved(struct termp *p, const char *word, size_t len)
1.94      kristaps  333: {
                    334:        const char      *rhs;
                    335:        size_t           sz;
                    336:        int              i;
                    337:
1.101     kristaps  338:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.94      kristaps  339:
1.96      kristaps  340:        if (NULL == rhs) {
                    341: #if 0
                    342:                fputs("Unknown reserved word: ", stderr);
                    343:                for (i = 0; i < (int)len; i++)
                    344:                        fputc(word[i], stderr);
                    345:                fputc('\n', stderr);
                    346: #endif
1.94      kristaps  347:                return;
1.96      kristaps  348:        }
1.94      kristaps  349:        for (i = 0; i < (int)sz; i++)
1.95      kristaps  350:                encode(p, rhs[i]);
1.17      kristaps  351: }
                    352:
                    353:
1.71      kristaps  354: /*
                    355:  * Handle an escape sequence: determine its length and pass it to the
                    356:  * escape-symbol look table.  Note that we assume mdoc(3) has validated
                    357:  * the escape sequence (we assert upon badly-formed escape sequences).
                    358:  */
                    359: static void
1.95      kristaps  360: do_escaped(struct termp *p, const char **word)
1.17      kristaps  361: {
1.97      kristaps  362:        int              j, type;
1.86      kristaps  363:        const char      *wp;
                    364:
                    365:        wp = *word;
1.97      kristaps  366:        type = 1;
1.17      kristaps  367:
1.86      kristaps  368:        if (0 == *(++wp)) {
                    369:                *word = wp;
1.71      kristaps  370:                return;
1.86      kristaps  371:        }
1.17      kristaps  372:
1.86      kristaps  373:        if ('(' == *wp) {
                    374:                wp++;
                    375:                if (0 == *wp || 0 == *(wp + 1)) {
                    376:                        *word = 0 == *wp ? wp : wp + 1;
1.71      kristaps  377:                        return;
1.86      kristaps  378:                }
1.22      kristaps  379:
1.95      kristaps  380:                do_special(p, wp, 2);
1.86      kristaps  381:                *word = ++wp;
1.71      kristaps  382:                return;
1.22      kristaps  383:
1.86      kristaps  384:        } else if ('*' == *wp) {
                    385:                if (0 == *(++wp)) {
                    386:                        *word = wp;
1.71      kristaps  387:                        return;
1.86      kristaps  388:                }
1.22      kristaps  389:
1.86      kristaps  390:                switch (*wp) {
1.71      kristaps  391:                case ('('):
1.86      kristaps  392:                        wp++;
                    393:                        if (0 == *wp || 0 == *(wp + 1)) {
                    394:                                *word = 0 == *wp ? wp : wp + 1;
1.71      kristaps  395:                                return;
1.86      kristaps  396:                        }
1.65      kristaps  397:
1.95      kristaps  398:                        do_reserved(p, wp, 2);
1.86      kristaps  399:                        *word = ++wp;
1.71      kristaps  400:                        return;
                    401:                case ('['):
1.97      kristaps  402:                        type = 0;
1.71      kristaps  403:                        break;
                    404:                default:
1.95      kristaps  405:                        do_reserved(p, wp, 1);
1.86      kristaps  406:                        *word = wp;
1.71      kristaps  407:                        return;
                    408:                }
                    409:
1.86      kristaps  410:        } else if ('f' == *wp) {
                    411:                if (0 == *(++wp)) {
                    412:                        *word = wp;
1.71      kristaps  413:                        return;
1.86      kristaps  414:                }
                    415:
                    416:                switch (*wp) {
1.71      kristaps  417:                case ('B'):
1.98      kristaps  418:                        p->bold++;
1.71      kristaps  419:                        break;
                    420:                case ('I'):
1.98      kristaps  421:                        p->under++;
1.71      kristaps  422:                        break;
                    423:                case ('P'):
                    424:                        /* FALLTHROUGH */
                    425:                case ('R'):
1.98      kristaps  426:                        p->bold = p->under = 0;
1.71      kristaps  427:                        break;
                    428:                default:
                    429:                        break;
                    430:                }
1.86      kristaps  431:
                    432:                *word = wp;
1.71      kristaps  433:                return;
1.22      kristaps  434:
1.86      kristaps  435:        } else if ('[' != *wp) {
1.95      kristaps  436:                do_special(p, wp, 1);
1.86      kristaps  437:                *word = wp;
1.71      kristaps  438:                return;
                    439:        }
1.28      kristaps  440:
1.86      kristaps  441:        wp++;
                    442:        for (j = 0; *wp && ']' != *wp; wp++, j++)
1.71      kristaps  443:                /* Loop... */ ;
1.28      kristaps  444:
1.86      kristaps  445:        if (0 == *wp) {
                    446:                *word = wp;
1.71      kristaps  447:                return;
1.86      kristaps  448:        }
1.48      kristaps  449:
1.97      kristaps  450:        if (type)
                    451:                do_special(p, wp - j, (size_t)j);
                    452:        else
                    453:                do_reserved(p, wp - j, (size_t)j);
1.86      kristaps  454:        *word = wp;
1.48      kristaps  455: }
                    456:
                    457:
1.71      kristaps  458: /*
                    459:  * Handle pwords, partial words, which may be either a single word or a
                    460:  * phrase that cannot be broken down (such as a literal string).  This
                    461:  * handles word styling.
                    462:  */
1.86      kristaps  463: void
                    464: term_word(struct termp *p, const char *word)
1.65      kristaps  465: {
1.88      kristaps  466:        const char       *sv;
1.71      kristaps  467:
1.100     kristaps  468:        sv = word;
                    469:
                    470:        if (word[0] && 0 == word[1])
                    471:                switch (word[0]) {
                    472:                case('.'):
                    473:                        /* FALLTHROUGH */
                    474:                case(','):
                    475:                        /* FALLTHROUGH */
                    476:                case(';'):
                    477:                        /* FALLTHROUGH */
                    478:                case(':'):
                    479:                        /* FALLTHROUGH */
                    480:                case('?'):
                    481:                        /* FALLTHROUGH */
                    482:                case('!'):
                    483:                        /* FALLTHROUGH */
                    484:                case(')'):
                    485:                        /* FALLTHROUGH */
                    486:                case(']'):
                    487:                        /* FALLTHROUGH */
                    488:                case('}'):
                    489:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    490:                                p->flags |= TERMP_NOSPACE;
                    491:                        break;
                    492:                default:
                    493:                        break;
                    494:                }
1.65      kristaps  495:
1.71      kristaps  496:        if ( ! (TERMP_NOSPACE & p->flags))
1.95      kristaps  497:                buffer(p, ' ');
1.65      kristaps  498:
1.71      kristaps  499:        if ( ! (p->flags & TERMP_NONOSPACE))
                    500:                p->flags &= ~TERMP_NOSPACE;
1.65      kristaps  501:
1.100     kristaps  502:        for ( ; *word; word++)
1.86      kristaps  503:                if ('\\' != *word)
1.95      kristaps  504:                        encode(p, *word);
1.79      kristaps  505:                else
1.95      kristaps  506:                        do_escaped(p, &word);
1.65      kristaps  507:
1.100     kristaps  508:        if (sv[0] && 0 == sv[1])
                    509:                switch (sv[0]) {
                    510:                case('('):
                    511:                        /* FALLTHROUGH */
                    512:                case('['):
                    513:                        /* FALLTHROUGH */
                    514:                case('{'):
                    515:                        p->flags |= TERMP_NOSPACE;
                    516:                        break;
                    517:                default:
                    518:                        break;
                    519:                }
1.65      kristaps  520: }
                    521:
                    522:
1.71      kristaps  523: /*
                    524:  * Insert a single character into the line-buffer.  If the buffer's
                    525:  * space is exceeded, then allocate more space by doubling the buffer
                    526:  * size.
                    527:  */
                    528: static void
1.95      kristaps  529: buffer(struct termp *p, char c)
1.51      kristaps  530: {
1.71      kristaps  531:        size_t           s;
1.51      kristaps  532:
1.71      kristaps  533:        if (p->col + 1 >= p->maxcols) {
                    534:                if (0 == p->maxcols)
                    535:                        p->maxcols = 256;
                    536:                s = p->maxcols * 2;
                    537:                p->buf = realloc(p->buf, s);
                    538:                if (NULL == p->buf)
1.98      kristaps  539:                        err(1, "realloc"); /* FIXME: shouldn't be here! */
1.71      kristaps  540:                p->maxcols = s;
                    541:        }
                    542:        p->buf[(int)(p->col)++] = c;
1.51      kristaps  543: }
                    544:
1.79      kristaps  545:
                    546: static void
1.95      kristaps  547: encode(struct termp *p, char c)
1.79      kristaps  548: {
1.89      kristaps  549:
1.98      kristaps  550:        if (' ' != c) {
                    551:                if (p->bold) {
1.95      kristaps  552:                        buffer(p, c);
                    553:                        buffer(p, 8);
1.79      kristaps  554:                }
1.98      kristaps  555:                if (p->under) {
1.95      kristaps  556:                        buffer(p, '_');
                    557:                        buffer(p, 8);
1.79      kristaps  558:                }
                    559:        }
1.95      kristaps  560:        buffer(p, c);
1.79      kristaps  561: }
1.106     kristaps  562:
                    563:
1.107   ! kristaps  564: size_t
        !           565: term_vspan(const struct roffsu *su)
1.106     kristaps  566: {
                    567:        double           r;
                    568:
1.107   ! kristaps  569:        switch (su->unit) {
1.106     kristaps  570:        case (SCALE_CM):
1.107   ! kristaps  571:                r = su->scale * 2;
1.106     kristaps  572:                break;
                    573:        case (SCALE_IN):
1.107   ! kristaps  574:                r = su->scale * 6;
1.106     kristaps  575:                break;
                    576:        case (SCALE_PC):
1.107   ! kristaps  577:                r = su->scale;
1.106     kristaps  578:                break;
                    579:        case (SCALE_PT):
1.107   ! kristaps  580:                r = su->scale / 8;
1.106     kristaps  581:                break;
                    582:        case (SCALE_MM):
1.107   ! kristaps  583:                r = su->scale / 1000;
1.106     kristaps  584:                break;
                    585:        case (SCALE_VS):
1.107   ! kristaps  586:                r = su->scale;
1.106     kristaps  587:                break;
                    588:        default:
1.107   ! kristaps  589:                r = su->scale - 1;
1.106     kristaps  590:                break;
                    591:        }
                    592:
                    593:        if (r < 0.0)
                    594:                r = 0.0;
1.107   ! kristaps  595:        return(/* LINTED */(size_t)
1.106     kristaps  596:                        r);
                    597: }
                    598:
                    599:
1.107   ! kristaps  600: size_t
        !           601: term_hspan(const struct roffsu *su)
1.106     kristaps  602: {
                    603:        double           r;
                    604:
1.107   ! kristaps  605:        switch (su->unit) {
1.106     kristaps  606:        case (SCALE_CM):
1.107   ! kristaps  607:                r = (4 * su->scale) + 2; /* FIXME: double-check. */
1.106     kristaps  608:                break;
                    609:        case (SCALE_IN):
1.107   ! kristaps  610:                r = (10 * su->scale) + 2; /* FIXME: double-check. */
1.106     kristaps  611:                break;
                    612:        case (SCALE_PC):
1.107   ! kristaps  613:                r = (10 * su->scale) / 6; /* FIXME: double-check. */
1.106     kristaps  614:                break;
                    615:        case (SCALE_PT):
1.107   ! kristaps  616:                r = (10 * su->scale) / 72; /* FIXME: double-check. */
1.106     kristaps  617:                break;
                    618:        case (SCALE_MM):
1.107   ! kristaps  619:                r = su->scale / 1000; /* FIXME: double-check. */
1.106     kristaps  620:                break;
                    621:        case (SCALE_VS):
1.107   ! kristaps  622:                r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106     kristaps  623:                break;
                    624:        default:
1.107   ! kristaps  625:                r = su->scale;
1.106     kristaps  626:                break;
                    627:        }
                    628:
                    629:        if (r < 0.0)
                    630:                r = 0.0;
1.107   ! kristaps  631:        return((size_t)/* LINTED */
1.106     kristaps  632:                        r);
                    633: }
                    634:
                    635:

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