Flip on printing `?' at Unicode codepoints in -Tascii, -Tpdf, and -Tps.

[mandoc.git] / term.c

diff --git a/term.c b/term.c
index bd5573953a5fe74b149794ffadd100a53911dc71..bfedefb0ff31e718b8f5f80d5ce3ddd619853414 100644 (file)
--- a/term.c
+++ b/term.c
@@ -1,6 +1,7 @@
-/*     $Id: term.c,v 1.149 2010/06/25 18:53:14 kristaps Exp $ */
+/*     $Id: term.c,v 1.192 2011/05/17 11:55:08 kristaps Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>

  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above


@@ -28,20 +29,13 @@
 #include <string.h>
 
 #include "mandoc.h"
 #include <string.h>
 
 #include "mandoc.h"

-#include "chars.h"

 #include "out.h"
 #include "term.h"
 #include "out.h"
 #include "term.h"

-#include "man.h"
-#include "mdoc.h"

 #include "main.h"
 
 #include "main.h"
 

-static void              spec(struct termp *, const char *, size_t);
-static void              res(struct termp *, const char *, size_t);
-static void              buffera(struct termp *, const char *, size_t);
-static void              bufferc(struct termp *, char);
-static void              adjbuf(struct termp *p, size_t);
-static void              encode(struct termp *, const char *, size_t);
-
+static void             adjbuf(struct termp *p, int);
+static void             bufferc(struct termp *, char);
+static void             encode(struct termp *, const char *, size_t);

 
 void
 term_free(struct termp *p)
 
 void
 term_free(struct termp *p)


@@ -50,7 +44,7 @@ term_free(struct termp *p)
        if (p->buf)
                free(p->buf);
        if (p->symtab)
        if (p->buf)
                free(p->buf);
        if (p->symtab)

-               chars_free(p->symtab);
+               mchars_free(p->symtab);

 
        free(p);
 }
 
        free(p);
 }


@@ -81,12 +75,7 @@ term_alloc(enum termenc enc)
 {
        struct termp    *p;
 
 {
        struct termp    *p;
 

-       p = calloc(1, sizeof(struct termp));
-       if (NULL == p) {
-               perror(NULL);
-               exit(EXIT_FAILURE);
-       }
-
+       p = mandoc_calloc(1, sizeof(struct termp));

        p->enc = enc;
        return(p);
 }
        p->enc = enc;
        return(p);
 }


@@ -135,9 +124,11 @@ term_flushln(struct termp *p)
        size_t           vbl;   /* number of blanks to prepend to output */
        size_t           vend;  /* end of word visual position on output */
        size_t           bp;    /* visual right border position */
        size_t           vbl;   /* number of blanks to prepend to output */
        size_t           vend;  /* end of word visual position on output */
        size_t           bp;    /* visual right border position */

-       int              j;     /* temporary loop index */
-       int              jhy;   /* last hyphen before line overflow */
-       size_t           maxvis, mmax;
+       size_t           dv;    /* temporary for visual pos calculations */
+       int              j;     /* temporary loop index for p->buf */
+       int              jhy;   /* last hyph before overflow w/r/t j */
+       size_t           maxvis; /* output position of visible boundary */
+       size_t           mmax; /* used in calculating bp */

 
        /*
         * First, establish the maximum columns of "visible" content.
 
        /*
         * First, establish the maximum columns of "visible" content.


@@ -145,40 +136,32 @@ term_flushln(struct termp *p)
         * an indentation, but can be, for tagged lists or columns, a
         * small set of values. 
         */
         * an indentation, but can be, for tagged lists or columns, a
         * small set of values. 
         */

-
-       assert(p->offset < p->rmargin);
-
-       maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
-               /* LINTED */ 
-               0 : p->rmargin - p->offset - p->overstep;
-       mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
-               /* LINTED */
-               0 : p->maxrmargin - p->offset - p->overstep;
+       assert  (p->rmargin >= p->offset);
+       dv     = p->rmargin - p->offset;
+       maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
+       dv     = p->maxrmargin - p->offset;
+       mmax   = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;

 
        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
 
        /*
         * Indent the first line of a paragraph.
         */
 
        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
 
        /*
         * Indent the first line of a paragraph.
         */

-       vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
-
-       /* 
-        * FIXME: if bp is zero, we still output the first word before
-        * breaking the line.
-        */
+       vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;

 
 

-       vis = vend = i = 0;
-       while (i < (int)p->col) {
+       vis = vend = 0;
+       i = 0;

 
 

+       while (i < p->col) {

                /*
                /*

-                * Handle literal tab characters.
+                * Handle literal tab characters: collapse all
+                * subsequent tabs into a single huge set of spaces.

                 */
                 */

-               for (j = i; j < (int)p->col; j++) {
-                       if ('\t' != p->buf[j])
-                               break;
-                       vend = (vis/p->tabwidth+1)*p->tabwidth;
+               while (i < p->col && '\t' == p->buf[i]) {
+                       vend = (vis / p->tabwidth + 1) * p->tabwidth;

                        vbl += vend - vis;
                        vis = vend;
                        vbl += vend - vis;
                        vis = vend;

+                       i++;

                }
 
                /*
                }
 
                /*


@@ -188,17 +171,24 @@ term_flushln(struct termp *p)
                 * space is printed according to regular spacing rules).
                 */
 
                 * space is printed according to regular spacing rules).
                 */
 

-               /* LINTED */
-               for (jhy = 0; j < (int)p->col; j++) {
+               for (j = i, jhy = 0; j < p->col; j++) {

                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
                                break;
                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
                                break;

-                       if (8 != p->buf[j]) {
-                               if (vend > vis && vend < bp &&
-                                   ASCII_HYPH == p->buf[j])
-                                       jhy = j;
-                               vend++;
-                       } else
-                               vend--;
+
+                       /* Back over the the last printed character. */
+                       if (8 == p->buf[j]) {
+                               assert(j);
+                               vend -= (*p->width)(p, p->buf[j - 1]);
+                               continue;
+                       }
+
+                       /* Regular word. */
+                       /* Break at the hyphen point if we overrun. */
+                       if (vend > vis && vend < bp && 
+                                       ASCII_HYPH == p->buf[j])
+                               jhy = j;
+
+                       vend += (*p->width)(p, p->buf[j]);

                }
 
                /*
                }
 
                /*


@@ -219,32 +209,27 @@ term_flushln(struct termp *p)
 
                        /* Remove the p->overstep width. */
 
 
                        /* Remove the p->overstep width. */
 

-                       bp += (int)/* LINTED */
-                               p->overstep;
+                       bp += (size_t)p->overstep;

                        p->overstep = 0;
                }
 
                        p->overstep = 0;
                }
 

-               /*
-                * Skip leading tabs, they were handled above.
-                */
-               while (i < (int)p->col && '\t' == p->buf[i])
-                       i++;
-

                /* Write out the [remaining] word. */
                /* Write out the [remaining] word. */

-               for ( ; i < (int)p->col; i++) {
+               for ( ; i < p->col; i++) {

                        if (vend > bp && jhy > 0 && i > jhy)
                                break;
                        if ('\t' == p->buf[i])
                                break;
                        if (' ' == p->buf[i]) {
                        if (vend > bp && jhy > 0 && i > jhy)
                                break;
                        if ('\t' == p->buf[i])
                                break;
                        if (' ' == p->buf[i]) {

-                               while (' ' == p->buf[i]) {
-                                       vbl++;
+                               j = i;
+                               while (' ' == p->buf[i])

                                        i++;
                                        i++;

-                               }
+                               dv = (size_t)(i - j) * (*p->width)(p, ' ');
+                               vbl += dv;
+                               vend += dv;

                                break;
                        }
                        if (ASCII_NBRSP == p->buf[i]) {
                                break;
                        }
                        if (ASCII_NBRSP == p->buf[i]) {

-                               vbl++;
+                               vbl += (*p->width)(p, ' ');

                                continue;
                        }
 
                                continue;
                        }
 


@@ -259,17 +244,23 @@ term_flushln(struct termp *p)
                                vbl = 0;
                        }
 
                                vbl = 0;
                        }
 

-                       if (ASCII_HYPH == p->buf[i])
+                       if (ASCII_HYPH == p->buf[i]) {

                                (*p->letter)(p, '-');
                                (*p->letter)(p, '-');

-                       else
+                               p->viscol += (*p->width)(p, '-');
+                       } else {

                                (*p->letter)(p, p->buf[i]);
                                (*p->letter)(p, p->buf[i]);

-
-                       p->viscol += 1;
+                               p->viscol += (*p->width)(p, p->buf[i]);
+                       }

                }
                }

-               vend += vbl;

                vis = vend;
        }
 
                vis = vend;
        }
 

+       /*
+        * If there was trailing white space, it was not printed;
+        * so reset the cursor position accordingly.
+        */
+       vis -= vbl;
+

        p->col = 0;
        p->overstep = 0;
 
        p->col = 0;
        p->overstep = 0;
 


@@ -281,8 +272,7 @@ term_flushln(struct termp *p)
 
        if (TERMP_HANG & p->flags) {
                /* We need one blank after the tag. */
 
        if (TERMP_HANG & p->flags) {
                /* We need one blank after the tag. */

-               p->overstep = /* LINTED */
-                       vis - maxvis + 1;
+               p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));

 
                /*
                 * Behave exactly the same way as groff:
 
                /*
                 * Behave exactly the same way as groff:


@@ -296,8 +286,7 @@ term_flushln(struct termp *p)
                 */
                if (p->overstep >= -1) {
                        assert((int)maxvis + p->overstep >= 0);
                 */
                if (p->overstep >= -1) {
                        assert((int)maxvis + p->overstep >= 0);

-                       /* LINTED */
-                       maxvis += p->overstep;
+                       maxvis += (size_t)p->overstep;

                } else
                        p->overstep = 0;
 
                } else
                        p->overstep = 0;
 


@@ -305,8 +294,8 @@ term_flushln(struct termp *p)
                return;
 
        /* Right-pad. */
                return;
 
        /* Right-pad. */

-       if (maxvis > vis + /* LINTED */
-                       ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
+       if (maxvis > vis +
+           ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {

                p->viscol += maxvis - vis;
                (*p->advance)(p, maxvis - vis);
                vis += (maxvis - vis);
                p->viscol += maxvis - vis;
                (*p->advance)(p, maxvis - vis);
                vis += (maxvis - vis);


@@ -352,31 +341,6 @@ term_vspace(struct termp *p)
        (*p->endline)(p);
 }
 
        (*p->endline)(p);
 }
 

-
-static void
-spec(struct termp *p, const char *word, size_t len)
-{
-       const char      *rhs;
-       size_t           sz;
-
-       rhs = chars_a2ascii(p->symtab, word, len, &sz);
-       if (rhs) 
-               encode(p, rhs, sz);
-}
-
-
-static void
-res(struct termp *p, const char *word, size_t len)
-{
-       const char      *rhs;
-       size_t           sz;
-
-       rhs = chars_a2res(p->symtab, word, len, &sz);
-       if (rhs)
-               encode(p, rhs, sz);
-}
-
-

 void
 term_fontlast(struct termp *p)
 {
 void
 term_fontlast(struct termp *p)
 {


@@ -441,7 +405,6 @@ term_fontpop(struct termp *p)
        p->fonti--;
 }
 
        p->fonti--;
 }
 

-

 /*
  * Handle pwords, partial words, which may be either a single word or a
  * phrase that cannot be broken down (such as a literal string).  This
 /*
  * Handle pwords, partial words, which may be either a single word or a
  * phrase that cannot be broken down (such as a literal string).  This


@@ -450,107 +413,87 @@ term_fontpop(struct termp *p)
 void
 term_word(struct termp *p, const char *word)
 {
 void
 term_word(struct termp *p, const char *word)
 {

-       const char      *sv, *seq;
+       const char      *seq, *cp;
+       char             c;

        int              sz;
        size_t           ssz;
        int              sz;
        size_t           ssz;

-       enum roffdeco    deco;
-
-       sv = word;
-
-       if (word[0] && '\0' == word[1])
-               switch (word[0]) {
-               case('.'):
-                       /* FALLTHROUGH */
-               case(','):
-                       /* FALLTHROUGH */
-               case(';'):
-                       /* FALLTHROUGH */
-               case(':'):
-                       /* FALLTHROUGH */
-               case('?'):
-                       /* FALLTHROUGH */
-               case('!'):
-                       /* FALLTHROUGH */
-               case(')'):
-                       /* FALLTHROUGH */
-               case(']'):
-                       if ( ! (TERMP_IGNDELIM & p->flags))
-                               p->flags |= TERMP_NOSPACE;
-                       break;
-               default:
-                       break;
-               }
+       enum mandoc_esc  esc;

 
        if ( ! (TERMP_NOSPACE & p->flags)) {
 
        if ( ! (TERMP_NOSPACE & p->flags)) {

-               bufferc(p, ' ');
-               if (TERMP_SENTENCE & p->flags)
+               if ( ! (TERMP_KEEP & p->flags)) {
+                       if (TERMP_PREKEEP & p->flags)
+                               p->flags |= TERMP_KEEP;

                        bufferc(p, ' ');
                        bufferc(p, ' ');

+                       if (TERMP_SENTENCE & p->flags)
+                               bufferc(p, ' ');
+               } else
+                       bufferc(p, ASCII_NBRSP);

        }
 
        if ( ! (p->flags & TERMP_NONOSPACE))
                p->flags &= ~TERMP_NOSPACE;
        }
 
        if ( ! (p->flags & TERMP_NONOSPACE))
                p->flags &= ~TERMP_NOSPACE;

+       else
+               p->flags |= TERMP_NOSPACE;

 
 

-       p->flags &= ~TERMP_SENTENCE;
+       p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);

 
 

-       /* FIXME: use strcspn. */
+       while ('\0' != *word) {
+               if ((ssz = strcspn(word, "\\")) > 0)
+                       encode(p, word, ssz);

 
 

-       while (*word) {
-               if ('\\' != *word) {
-                       encode(p, word, 1);
-                       word++;
+               word += (int)ssz;
+               if ('\\' != *word)

                        continue;
                        continue;

-               }

 
 

-               seq = ++word;
-               sz = a2roffdeco(&deco, &seq, &ssz);
+               word++;
+               esc = mandoc_escape(&word, &seq, &sz);
+               if (ESCAPE_ERROR == esc)
+                       break;

 
 

-               switch (deco) {
-               case (DECO_RESERVED):
-                       res(p, seq, ssz);
+               switch (esc) {
+               case (ESCAPE_UNICODE):
+                       encode(p, "?", 1);
+                       break;
+               case (ESCAPE_NUMBERED):
+                       if ('\0' != (c = mchars_num2char(seq, sz)))
+                               encode(p, &c, 1);

                        break;
                        break;

-               case (DECO_SPECIAL):
-                       spec(p, seq, ssz);
+               case (ESCAPE_PREDEF):
+                       cp = mchars_res2str(p->symtab, seq, sz, &ssz);
+                       if (NULL != cp)
+                               encode(p, cp, ssz);

                        break;
                        break;

-               case (DECO_BOLD):
+               case (ESCAPE_SPECIAL):
+                       cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
+                       if (NULL != cp) 
+                               encode(p, cp, ssz);
+                       else if (1 == ssz)
+                               encode(p, seq, sz);
+                       break;
+               case (ESCAPE_FONTBOLD):

                        term_fontrepl(p, TERMFONT_BOLD);
                        break;
                        term_fontrepl(p, TERMFONT_BOLD);
                        break;

-               case (DECO_ITALIC):
+               case (ESCAPE_FONTITALIC):

                        term_fontrepl(p, TERMFONT_UNDER);
                        break;
                        term_fontrepl(p, TERMFONT_UNDER);
                        break;

-               case (DECO_ROMAN):
+               case (ESCAPE_FONTROMAN):

                        term_fontrepl(p, TERMFONT_NONE);
                        break;
                        term_fontrepl(p, TERMFONT_NONE);
                        break;

-               case (DECO_PREVIOUS):
+               case (ESCAPE_FONTPREV):

                        term_fontlast(p);
                        break;
                        term_fontlast(p);
                        break;

-               default:
-                       break;
-               }
-
-               word += sz;
-               if (DECO_NOSPACE == deco && '\0' == *word)
-                       p->flags |= TERMP_NOSPACE;
-       }
-
-       /* 
-        * Note that we don't process the pipe: the parser sees it as
-        * punctuation, but we don't in terms of typography.
-        */
-       if (sv[0] && 0 == sv[1])
-               switch (sv[0]) {
-               case('('):
-                       /* FALLTHROUGH */
-               case('['):
-                       p->flags |= TERMP_NOSPACE;
+               case (ESCAPE_NOSPACE):
+                       if ('\0' == *word)
+                               p->flags |= TERMP_NOSPACE;

                        break;
                default:
                        break;
                }
                        break;
                default:
                        break;
                }

+       }

 }
 
 }
 

-

 static void
 static void

-adjbuf(struct termp *p, size_t sz)
+adjbuf(struct termp *p, int sz)

 {
 
        if (0 == p->maxcols)
 {
 
        if (0 == p->maxcols)


@@ -558,26 +501,10 @@ adjbuf(struct termp *p, size_t sz)
        while (sz >= p->maxcols)
                p->maxcols <<= 2;
 
        while (sz >= p->maxcols)
                p->maxcols <<= 2;
 

-       p->buf = realloc(p->buf, p->maxcols);
-       if (NULL == p->buf) {
-               perror(NULL);
-               exit(EXIT_FAILURE);
-       }
+       p->buf = mandoc_realloc
+               (p->buf, sizeof(int) * (size_t)p->maxcols);

 }
 
 }
 

-
-static void
-buffera(struct termp *p, const char *word, size_t sz)
-{
-
-       if (p->col + sz >= p->maxcols) 
-               adjbuf(p, p->col + sz);
-
-       memcpy(&p->buf[(int)p->col], word, sz);
-       p->col += sz;
-}
-
-

 static void
 bufferc(struct termp *p, char c)
 {
 static void
 bufferc(struct termp *p, char c)
 {


@@ -585,15 +512,17 @@ bufferc(struct termp *p, char c)
        if (p->col + 1 >= p->maxcols)
                adjbuf(p, p->col + 1);
 
        if (p->col + 1 >= p->maxcols)
                adjbuf(p, p->col + 1);
 

-       p->buf[(int)p->col++] = c;
+       p->buf[p->col++] = c;

 }
 
 }
 

-

 static void
 encode(struct termp *p, const char *word, size_t sz)
 {
        enum termfont     f;
 static void
 encode(struct termp *p, const char *word, size_t sz)
 {
        enum termfont     f;

-       int               i;
+       int               i, len;
+
+       /* LINTED */
+       len = sz;

 
        /*
         * Encode and buffer a string of characters.  If the current
 
        /*
         * Encode and buffer a string of characters.  If the current


@@ -602,27 +531,34 @@ encode(struct termp *p, const char *word, size_t sz)
         */
 
        if (TERMFONT_NONE == (f = term_fonttop(p))) {
         */
 
        if (TERMFONT_NONE == (f = term_fonttop(p))) {

-               buffera(p, word, sz);
+               if (p->col + len >= p->maxcols) 
+                       adjbuf(p, p->col + len);
+               for (i = 0; i < len; i++)
+                       p->buf[p->col++] = word[i];

                return;
        }
 
                return;
        }
 

-       for (i = 0; i < (int)sz; i++) {
-               if ( ! isgraph((u_char)word[i])) {
-                       bufferc(p, word[i]);
+       /* Pre-buffer, assuming worst-case. */
+
+       if (p->col + 1 + (len * 3) >= p->maxcols)
+               adjbuf(p, p->col + 1 + (len * 3));
+
+       for (i = 0; i < len; i++) {
+               if ( ! isgraph((unsigned char)word[i])) {
+                       p->buf[p->col++] = word[i];

                        continue;
                }
 
                if (TERMFONT_UNDER == f)
                        continue;
                }
 
                if (TERMFONT_UNDER == f)

-                       bufferc(p, '_');
+                       p->buf[p->col++] = '_';

                else
                else

-                       bufferc(p, word[i]);
+                       p->buf[p->col++] = word[i];

 
 

-               bufferc(p, 8);
-               bufferc(p, word[i]);
+               p->buf[p->col++] = 8;
+               p->buf[p->col++] = word[i];

        }
 }
 
        }
 }
 

-

 size_t
 term_len(const struct termp *p, size_t sz)
 {
 size_t
 term_len(const struct termp *p, size_t sz)
 {


@@ -634,15 +570,81 @@ term_len(const struct termp *p, size_t sz)
 size_t
 term_strlen(const struct termp *p, const char *cp)
 {
 size_t
 term_strlen(const struct termp *p, const char *cp)
 {

-       size_t           sz;
+       size_t           sz, rsz, i;
+       int              ssz, c;
+       const char      *seq, *rhs;
+       static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
+
+       /*
+        * Account for escaped sequences within string length
+        * calculations.  This follows the logic in term_word() as we
+        * must calculate the width of produced strings.
+        */

 
 

-       for (sz = 0; *cp; cp++)
-               sz += (*p->width)(p, *cp);
+       sz = 0;
+       while ('\0' != *cp) {
+               rsz = strcspn(cp, rej);
+               for (i = 0; i < rsz; i++)
+                       sz += (*p->width)(p, *cp++);
+
+               c = 0;
+               switch (*cp) {
+               case ('\\'):
+                       cp++;
+                       rhs = NULL;
+                       switch (mandoc_escape(&cp, &seq, &ssz)) {
+                       case (ESCAPE_ERROR):
+                               return(sz);
+                       case (ESCAPE_UNICODE):
+                               c = '?';
+                               /* FALLTHROUGH */
+                       case (ESCAPE_NUMBERED):
+                               if ('\0' != c)
+                                       c = mchars_num2char(seq, ssz);
+                               if ('\0' != c)
+                                       sz += (*p->width)(p, c);
+                               break;
+                       case (ESCAPE_PREDEF):
+                               rhs = mchars_res2str
+                                       (p->symtab, seq, ssz, &rsz);
+                               break;
+                       case (ESCAPE_SPECIAL):
+                               rhs = mchars_spec2str
+                                       (p->symtab, seq, ssz, &rsz);
+
+                               if (ssz != 1 || rhs)
+                                       break;
+
+                               rhs = seq;
+                               rsz = ssz;
+                               break;
+                       default:
+                               break;
+                       }
+
+                       if (NULL == rhs)
+                               break;
+
+                       for (i = 0; i < rsz; i++)
+                               sz += (*p->width)(p, *rhs++);
+                       break;
+               case (ASCII_NBRSP):
+                       sz += (*p->width)(p, ' ');
+                       cp++;
+                       break;
+               case (ASCII_HYPH):
+                       sz += (*p->width)(p, '-');
+                       cp++;
+                       break;
+               default:
+                       break;
+               }
+       }

 
        return(sz);
 }
 
 
        return(sz);
 }
 

-
+/* ARGSUSED */

 size_t
 term_vspan(const struct termp *p, const struct roffsu *su)
 {
 size_t
 term_vspan(const struct termp *p, const struct roffsu *su)
 {


@@ -678,43 +680,14 @@ term_vspan(const struct termp *p, const struct roffsu *su)
                        r);
 }
 
                        r);
 }
 

-

 size_t
 term_hspan(const struct termp *p, const struct roffsu *su)
 {
 size_t
 term_hspan(const struct termp *p, const struct roffsu *su)
 {

-       double           r;
-
-       /* XXX: CM, IN, and PT are approximations. */
+       double           v;

 
 

-       switch (su->unit) {
-       case (SCALE_CM):
-               r = 4 * su->scale;
-               break;
-       case (SCALE_IN):
-               /* XXX: this is an approximation. */
-               r = 10 * su->scale;
-               break;
-       case (SCALE_PC):
-               r = (10 * su->scale) / 6;
-               break;
-       case (SCALE_PT):
-               r = (10 * su->scale) / 72;
-               break;
-       case (SCALE_MM):
-               r = su->scale / 1000; /* FIXME: double-check. */
-               break;
-       case (SCALE_VS):
-               r = su->scale * 2 - 1; /* FIXME: double-check. */
-               break;
-       default:
-               r = su->scale;
-               break;
-       }
-
-       if (r < 0.0)
-               r = 0.0;
-       return((size_t)/* LINTED */
-                       r);
+       v = ((*p->hspan)(p, su));
+       if (v < 0.0)
+               v = 0.0;
+       return((size_t) /* LINTED */
+                       v);

 }
 }

-
-