Render roff escape sequences contained in manual page descriptions

[mandoc.git] / term.c

diff --git a/term.c b/term.c
index 6229031285e3721b3daecb5c93c22abb29bbe83e..c6a4015019c2fc6ffcd68203d15b6f883ea5dd82 100644 (file)
--- a/term.c
+++ b/term.c
@@ -1,7 +1,7 @@
-/*     $Id: term.c,v 1.206 2012/11/16 17:16:55 schwarze Exp $ */
+/*     $Id: term.c,v 1.223 2014/04/23 21:06:41 schwarze Exp $ */

 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>

- * Copyright (c) 2010, 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010-2014 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


@@ -23,22 +23,23 @@
 
 #include <assert.h>
 #include <ctype.h>
 
 #include <assert.h>
 #include <ctype.h>

-#include <stdint.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "mandoc.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "mandoc.h"

+#include "mandoc_aux.h"

 #include "out.h"
 #include "term.h"
 #include "main.h"
 
 static size_t           cond_width(const struct termp *, int, int *);
 #include "out.h"
 #include "term.h"
 #include "main.h"
 
 static size_t           cond_width(const struct termp *, int, int *);

-static void             adjbuf(struct termp *p, int);
+static void             adjbuf(struct termp *p, size_t);

 static void             bufferc(struct termp *, char);
 static void             encode(struct termp *, const char *, size_t);
 static void             encode1(struct termp *, int);
 
 static void             bufferc(struct termp *, char);
 static void             encode(struct termp *, const char *, size_t);
 static void             encode1(struct termp *, int);
 

+

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


@@ -51,9 +52,8 @@ term_free(struct termp *p)
        free(p);
 }
 
        free(p);
 }
 

-

 void
 void

-term_begin(struct termp *p, term_margin head, 
+term_begin(struct termp *p, term_margin head,

                term_margin foot, const void *arg)
 {
 
                term_margin foot, const void *arg)
 {
 


@@ -63,7 +63,6 @@ term_begin(struct termp *p, term_margin head,
        (*p->begin)(p);
 }
 
        (*p->begin)(p);
 }
 

-

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


@@ -72,48 +71,40 @@ term_end(struct termp *p)
 }
 
 /*
 }
 
 /*

- * Flush a line of text.  A "line" is loosely defined as being something
- * that should be followed by a newline, regardless of whether it's
- * broken apart by newlines getting there.  A line can also be a
- * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
- * not have a trailing newline.
- *
+ * Flush a chunk of text.  By default, break the output line each time
+ * the right margin is reached, and continue output on the next line
+ * at the same offset as the chunk itself.  By default, also break the
+ * output line at the end of the chunk.

  * The following flags may be specified:
  *
  * The following flags may be specified:
  *

- *  - TERMP_NOBREAK: this is the most important and is used when making
- *    columns.  In short: don't print a newline and instead expect the
- *    next call to do the padding up to the start of the next column.
- *
- *  - TERMP_TWOSPACE: make sure there is room for at least two space
- *    characters of padding.  Otherwise, rather break the line.
- *
- *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
- *    the line is overrun, and don't pad-right if it's underrun.
- *
- *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
- *    overrunning, instead save the position and continue at that point
- *    when the next invocation.
- *
- *  In-line line breaking:
- *
- *  If TERMP_NOBREAK is specified and the line overruns the right
- *  margin, it will break and pad-right to the right margin after
- *  writing.  If maxrmargin is violated, it will break and continue
- *  writing from the right-margin, which will lead to the above scenario
- *  upon exit.  Otherwise, the line will break at the right margin.
+ *  - TERMP_NOBREAK: Do not break the output line at the right margin,
+ *    but only at the max right margin.  Also, do not break the output
+ *    line at the end of the chunk, such that the next call can pad to
+ *    the next column.  However, if less than p->trailspace blanks,
+ *    which can be 0, 1, or 2, remain to the right margin, the line
+ *    will be broken.
+ *  - TERMP_BRIND: If the chunk does not fit and the output line has
+ *    to be broken, start the next line at the right margin instead
+ *    of at the offset.  Used together with TERMP_NOBREAK for the tags
+ *    in various kinds of tagged lists.
+ *  - TERMP_DANGLE: Do not break the output line at the right margin,
+ *    append the next chunk after it even if this one is too long.
+ *    To be used together with TERMP_NOBREAK.
+ *  - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
+ *    the next chunk if this column is not full.

  */
 void
 term_flushln(struct termp *p)
 {
  */
 void
 term_flushln(struct termp *p)
 {

-       int              i;     /* current input position in p->buf */
+       size_t           i;     /* current input position in p->buf */

        int              ntab;  /* number of tabs to prepend */
        size_t           vis;   /* current visual position on output */
        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           dv;    /* temporary for visual pos calculations */
        int              ntab;  /* number of tabs to prepend */
        size_t           vis;   /* current visual position on output */
        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           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           j;     /* temporary loop index for p->buf */
+       size_t           jhy;   /* last hyph before overflow w/r/t j */

        size_t           maxvis; /* output position of visible boundary */
        size_t           mmax; /* used in calculating bp */
 
        size_t           maxvis; /* output position of visible boundary */
        size_t           mmax; /* used in calculating bp */
 


@@ -121,7 +112,12 @@ term_flushln(struct termp *p)
         * First, establish the maximum columns of "visible" content.
         * This is usually the difference between the right-margin and
         * an indentation, but can be, for tagged lists or columns, a
         * First, establish the maximum columns of "visible" content.
         * This is usually the difference between the right-margin and
         * an indentation, but can be, for tagged lists or columns, a

-        * small set of values. 
+        * small set of values.
+        *
+        * The following unsigned-signed subtractions look strange,
+        * but they are actually correct.  If the int p->overstep
+        * is negative, it gets sign extended.  Subtracting that
+        * very large size_t effectively adds a small number to dv.

         */
        assert  (p->rmargin >= p->offset);
        dv     = p->rmargin - p->offset;
         */
        assert  (p->rmargin >= p->offset);
        dv     = p->rmargin - p->offset;


@@ -162,7 +158,7 @@ term_flushln(struct termp *p)
                 */
 
                for (j = i, jhy = 0; j < p->col; j++) {
                 */
 
                for (j = i, jhy = 0; j < p->col; j++) {

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

                                break;
 
                        /* Back over the the last printed character. */
                                break;
 
                        /* Back over the the last printed character. */


@@ -174,10 +170,18 @@ term_flushln(struct termp *p)
 
                        /* Regular word. */
                        /* Break at the hyphen point if we overrun. */
 
                        /* Regular word. */
                        /* Break at the hyphen point if we overrun. */

-                       if (vend > vis && vend < bp && 
-                                       ASCII_HYPH == p->buf[j])
+                       if (vend > vis && vend < bp &&
+                           (ASCII_HYPH == p->buf[j] ||
+                            ASCII_BREAK == p->buf[j]))

                                jhy = j;
 
                                jhy = j;
 

+                       /*
+                        * Hyphenation now decided, put back a real
+                        * hyphen such that we get the correct width.
+                        */
+                       if (ASCII_HYPH == p->buf[j])
+                               p->buf[j] = '-';
+

                        vend += (*p->width)(p, p->buf[j]);
                }
 
                        vend += (*p->width)(p, p->buf[j]);
                }
 


@@ -189,7 +193,7 @@ term_flushln(struct termp *p)
                        vend -= vis;
                        (*p->endline)(p);
                        p->viscol = 0;
                        vend -= vis;
                        (*p->endline)(p);
                        p->viscol = 0;

-                       if (TERMP_NOBREAK & p->flags) {
+                       if (TERMP_BRIND & p->flags) {

                                vbl = p->rmargin;
                                vend += p->rmargin - p->offset;
                        } else
                                vbl = p->rmargin;
                                vend += p->rmargin - p->offset;
                        } else


@@ -200,7 +204,11 @@ term_flushln(struct termp *p)
                        if (0 < ntab)
                                vbl += ntab * p->tabwidth;
 
                        if (0 < ntab)
                                vbl += ntab * p->tabwidth;
 

-                       /* Remove the p->overstep width. */
+                       /*
+                        * Remove the p->overstep width.
+                        * Again, if p->overstep is negative,
+                        * sign extension does the right thing.
+                        */

 
                        bp += (size_t)p->overstep;
                        p->overstep = 0;
 
                        bp += (size_t)p->overstep;
                        p->overstep = 0;


@@ -216,7 +224,7 @@ term_flushln(struct termp *p)
                                j = i;
                                while (' ' == p->buf[i])
                                        i++;
                                j = i;
                                while (' ' == p->buf[i])
                                        i++;

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

                                vbl += dv;
                                vend += dv;
                                break;
                                vbl += dv;
                                vend += dv;
                                break;


@@ -225,6 +233,8 @@ term_flushln(struct termp *p)
                                vbl += (*p->width)(p, ' ');
                                continue;
                        }
                                vbl += (*p->width)(p, ' ');
                                continue;
                        }

+                       if (ASCII_BREAK == p->buf[i])
+                               continue;

 
                        /*
                         * Now we definitely know there will be
 
                        /*
                         * Now we definitely know there will be


@@ -237,16 +247,10 @@ term_flushln(struct termp *p)
                                vbl = 0;
                        }
 
                                vbl = 0;
                        }
 

-                       if (ASCII_HYPH == p->buf[i]) {
-                               (*p->letter)(p, '-');
-                               p->viscol += (*p->width)(p, '-');
-                               continue;
-                       }
-

                        (*p->letter)(p, p->buf[i]);
                        if (8 == p->buf[i])
                                p->viscol -= (*p->width)(p, p->buf[i-1]);
                        (*p->letter)(p, p->buf[i]);
                        if (8 == p->buf[i])
                                p->viscol -= (*p->width)(p, p->buf[i-1]);

-                       else 
+                       else

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


@@ -269,15 +273,17 @@ term_flushln(struct termp *p)
        }
 
        if (TERMP_HANG & p->flags) {
        }
 
        if (TERMP_HANG & p->flags) {

-               /* We need one blank after the tag. */
-               p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
+               p->overstep = (int)(vis - maxvis +
+                   p->trailspace * (*p->width)(p, ' '));

 
                /*
                 * If we have overstepped the margin, temporarily move
                 * it to the right and flag the rest of the line to be
                 * shorter.
 
                /*
                 * If we have overstepped the margin, temporarily move
                 * it to the right and flag the rest of the line to be
                 * shorter.

+                * If there is a request to keep the columns together,
+                * allow negative overstep when the column is not full.

                 */
                 */

-               if (p->overstep < 0)
+               if (p->trailspace && p->overstep < 0)

                        p->overstep = 0;
                return;
 
                        p->overstep = 0;
                return;
 


@@ -285,15 +291,13 @@ term_flushln(struct termp *p)
                return;
 
        /* If the column was overrun, break the line. */
                return;
 
        /* If the column was overrun, break the line. */

-       if (maxvis <= vis +
-           ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
+       if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {

                (*p->endline)(p);
                p->viscol = 0;
        }
 }
 
                (*p->endline)(p);
                p->viscol = 0;
        }
 }
 

-
-/* 
+/*

  * A newline only breaks an existing line; it won't assert vertical
  * space.  All data in the output buffer is flushed prior to the newline
  * assertion.
  * A newline only breaks an existing line; it won't assert vertical
  * space.  All data in the output buffer is flushed prior to the newline
  * assertion.


@@ -307,7 +311,6 @@ term_newln(struct termp *p)
                term_flushln(p);
 }
 
                term_flushln(p);
 }
 

-

 /*
  * Asserts a vertical space (a full, empty line-break between lines).
  * Note that if used twice, this will cause two blank spaces and so on.
 /*
  * Asserts a vertical space (a full, empty line-break between lines).
  * Note that if used twice, this will cause two blank spaces and so on.


@@ -336,7 +339,6 @@ term_fontlast(struct termp *p)
        p->fontq[p->fonti] = f;
 }
 
        p->fontq[p->fonti] = f;
 }
 

-

 void
 term_fontrepl(struct termp *p, enum termfont f)
 {
 void
 term_fontrepl(struct termp *p, enum termfont f)
 {


@@ -345,7 +347,6 @@ term_fontrepl(struct termp *p, enum termfont f)
        p->fontq[p->fonti] = f;
 }
 
        p->fontq[p->fonti] = f;
 }
 

-

 void
 term_fontpush(struct termp *p, enum termfont f)
 {
 void
 term_fontpush(struct termp *p, enum termfont f)
 {


@@ -355,7 +356,6 @@ term_fontpush(struct termp *p, enum termfont f)
        p->fontq[++p->fonti] = f;
 }
 
        p->fontq[++p->fonti] = f;
 }
 

-

 const void *
 term_fontq(struct termp *p)
 {
 const void *
 term_fontq(struct termp *p)
 {


@@ -363,7 +363,6 @@ term_fontq(struct termp *p)
        return(&p->fontq[p->fonti]);
 }
 
        return(&p->fontq[p->fonti]);
 }
 

-

 enum termfont
 term_fonttop(struct termp *p)
 {
 enum termfont
 term_fonttop(struct termp *p)
 {


@@ -371,7 +370,6 @@ term_fonttop(struct termp *p)
        return(p->fontq[p->fonti]);
 }
 
        return(p->fontq[p->fonti]);
 }
 

-

 void
 term_fontpopq(struct termp *p, const void *key)
 {
 void
 term_fontpopq(struct termp *p, const void *key)
 {


@@ -381,7 +379,6 @@ term_fontpopq(struct termp *p, const void *key)
        assert(p->fonti >= 0);
 }
 
        assert(p->fonti >= 0);
 }
 

-

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


@@ -398,6 +395,7 @@ 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       nbrsp[2] = { ASCII_NBRSP, 0 };

        const char      *seq, *cp;
        char             c;
        int              sz, uc;
        const char      *seq, *cp;
        char             c;
        int              sz, uc;


@@ -406,21 +404,21 @@ term_word(struct termp *p, const char *word)
 
        if ( ! (TERMP_NOSPACE & p->flags)) {
                if ( ! (TERMP_KEEP & p->flags)) {
 
        if ( ! (TERMP_NOSPACE & p->flags)) {
                if ( ! (TERMP_KEEP & p->flags)) {

-                       if (TERMP_PREKEEP & p->flags)
-                               p->flags |= TERMP_KEEP;

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

+       if (TERMP_PREKEEP & p->flags)
+               p->flags |= TERMP_KEEP;

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

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

 
        while ('\0' != *word) {
                if ('\\' != *word) {
 
        while ('\0' != *word) {
                if ('\\' != *word) {


@@ -429,7 +427,15 @@ term_word(struct termp *p, const char *word)
                                word++;
                                continue;
                        }
                                word++;
                                continue;
                        }

-                       ssz = strcspn(word, "\\");
+                       if (TERMP_NBRWORD & p->flags) {
+                               if (' ' == *word) {
+                                       encode(p, nbrsp, 1);
+                                       word++;
+                                       continue;
+                               }
+                               ssz = strcspn(word, "\\ ");
+                       } else
+                               ssz = strcspn(word, "\\");

                        encode(p, word, ssz);
                        word += (int)ssz;
                        continue;
                        encode(p, word, ssz);
                        word += (int)ssz;
                        continue;


@@ -442,13 +448,13 @@ term_word(struct termp *p, const char *word)
 
                if (TERMENC_ASCII != p->enc)
                        switch (esc) {
 
                if (TERMENC_ASCII != p->enc)
                        switch (esc) {

-                       case (ESCAPE_UNICODE):
+                       case ESCAPE_UNICODE:

                                uc = mchars_num2uc(seq + 1, sz - 1);
                                if ('\0' == uc)
                                        break;
                                encode1(p, uc);
                                continue;
                                uc = mchars_num2uc(seq + 1, sz - 1);
                                if ('\0' == uc)
                                        break;
                                encode1(p, uc);
                                continue;

-                       case (ESCAPE_SPECIAL):
+                       case ESCAPE_SPECIAL:

                                uc = mchars_spec2cp(p->symtab, seq, sz);
                                if (uc <= 0)
                                        break;
                                uc = mchars_spec2cp(p->symtab, seq, sz);
                                if (uc <= 0)
                                        break;


@@ -459,52 +465,56 @@ term_word(struct termp *p, const char *word)
                        }
 
                switch (esc) {
                        }
 
                switch (esc) {

-               case (ESCAPE_UNICODE):
+               case ESCAPE_UNICODE:

                        encode1(p, '?');
                        break;
                        encode1(p, '?');
                        break;

-               case (ESCAPE_NUMBERED):
+               case ESCAPE_NUMBERED:

                        c = mchars_num2char(seq, sz);
                        if ('\0' != c)
                                encode(p, &c, 1);
                        break;
                        c = mchars_num2char(seq, sz);
                        if ('\0' != c)
                                encode(p, &c, 1);
                        break;

-               case (ESCAPE_SPECIAL):
+               case ESCAPE_SPECIAL:

                        cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
                        cp = mchars_spec2str(p->symtab, seq, sz, &ssz);

-                       if (NULL != cp) 
+                       if (NULL != cp)

                                encode(p, cp, ssz);
                        else if (1 == ssz)
                                encode(p, seq, sz);
                        break;
                                encode(p, cp, ssz);
                        else if (1 == ssz)
                                encode(p, seq, sz);
                        break;

-               case (ESCAPE_FONTBOLD):
+               case ESCAPE_FONTBOLD:

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

-               case (ESCAPE_FONTITALIC):
+               case ESCAPE_FONTITALIC:

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

-               case (ESCAPE_FONT):
+               case ESCAPE_FONTBI:
+                       term_fontrepl(p, TERMFONT_BI);
+                       break;
+               case ESCAPE_FONT:

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (ESCAPE_FONTROMAN):
+               case ESCAPE_FONTROMAN:

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

-               case (ESCAPE_FONTPREV):
+               case ESCAPE_FONTPREV:

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

-               case (ESCAPE_NOSPACE):
+               case ESCAPE_NOSPACE:

                        if (TERMP_SKIPCHAR & p->flags)
                                p->flags &= ~TERMP_SKIPCHAR;
                        else if ('\0' == *word)
                                p->flags |= TERMP_NOSPACE;
                        break;
                        if (TERMP_SKIPCHAR & p->flags)
                                p->flags &= ~TERMP_SKIPCHAR;
                        else if ('\0' == *word)
                                p->flags |= TERMP_NOSPACE;
                        break;

-               case (ESCAPE_SKIPCHAR):
+               case ESCAPE_SKIPCHAR:

                        p->flags |= TERMP_SKIPCHAR;
                        break;
                default:
                        break;
                }
        }
                        p->flags |= TERMP_SKIPCHAR;
                        break;
                default:
                        break;
                }
        }

+       p->flags &= ~TERMP_NBRWORD;

 }
 
 static void
 }
 
 static void

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

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


@@ -512,8 +522,7 @@ adjbuf(struct termp *p, int sz)
        while (sz >= p->maxcols)
                p->maxcols <<= 2;
 
        while (sz >= p->maxcols)
                p->maxcols <<= 2;
 

-       p->buf = mandoc_realloc
-               (p->buf, sizeof(int) * (size_t)p->maxcols);
+       p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));

 }
 
 static void
 }
 
 static void


@@ -541,73 +550,91 @@ encode1(struct termp *p, int c)
                return;
        }
 
                return;
        }
 

-       if (p->col + 4 >= p->maxcols)
-               adjbuf(p, p->col + 4);
+       if (p->col + 6 >= p->maxcols)
+               adjbuf(p, p->col + 6);

 
        f = term_fonttop(p);
 
 
        f = term_fonttop(p);
 

-       if (TERMFONT_NONE == f) {
-               p->buf[p->col++] = c;
-               return;
-       } else if (TERMFONT_UNDER == f) {
+       if (TERMFONT_UNDER == f || TERMFONT_BI == f) {

                p->buf[p->col++] = '_';
                p->buf[p->col++] = '_';

-       } else
-               p->buf[p->col++] = c;
-
-       p->buf[p->col++] = 8;
+               p->buf[p->col++] = 8;
+       }
+       if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
+               if (ASCII_HYPH == c)
+                       p->buf[p->col++] = '-';
+               else
+                       p->buf[p->col++] = c;
+               p->buf[p->col++] = 8;
+       }

        p->buf[p->col++] = c;
 }
 
 static void
 encode(struct termp *p, const char *word, size_t sz)
 {
        p->buf[p->col++] = c;
 }
 
 static void
 encode(struct termp *p, const char *word, size_t sz)
 {

-       enum termfont     f;
-       int               i, len;
+       size_t            i;

 
        if (TERMP_SKIPCHAR & p->flags) {
                p->flags &= ~TERMP_SKIPCHAR;
                return;
        }
 
 
        if (TERMP_SKIPCHAR & p->flags) {
                p->flags &= ~TERMP_SKIPCHAR;
                return;
        }
 

-       /* LINTED */
-       len = sz;
-

        /*
         * Encode and buffer a string of characters.  If the current
         * font mode is unset, buffer directly, else encode then buffer
         * character by character.
         */
 
        /*
         * Encode and buffer a string of characters.  If the current
         * font mode is unset, buffer directly, else encode then buffer
         * character by character.
         */
 

-       if (TERMFONT_NONE == (f = term_fonttop(p))) {
-               if (p->col + len >= p->maxcols) 
-                       adjbuf(p, p->col + len);
-               for (i = 0; i < len; i++)
+       if (TERMFONT_NONE == term_fonttop(p)) {
+               if (p->col + sz >= p->maxcols)
+                       adjbuf(p, p->col + sz);
+               for (i = 0; i < sz; i++)

                        p->buf[p->col++] = word[i];
                return;
        }
 
        /* Pre-buffer, assuming worst-case. */
 
                        p->buf[p->col++] = word[i];
                return;
        }
 
        /* Pre-buffer, assuming worst-case. */
 

-       if (p->col + 1 + (len * 3) >= p->maxcols)
-               adjbuf(p, p->col + 1 + (len * 3));
+       if (p->col + 1 + (sz * 5) >= p->maxcols)
+               adjbuf(p, p->col + 1 + (sz * 5));

 
 

-       for (i = 0; i < len; i++) {
-               if (ASCII_HYPH != word[i] &&
-                   ! isgraph((unsigned char)word[i])) {
-                       p->buf[p->col++] = word[i];
-                       continue;
-               }
-
-               if (TERMFONT_UNDER == f)
-                       p->buf[p->col++] = '_';
-               else if (ASCII_HYPH == word[i])
-                       p->buf[p->col++] = '-';
+       for (i = 0; i < sz; i++) {
+               if (ASCII_HYPH == word[i] ||
+                   isgraph((unsigned char)word[i]))
+                       encode1(p, word[i]);

                else
                        p->buf[p->col++] = word[i];
                else
                        p->buf[p->col++] = word[i];

+       }
+}

 
 

-               p->buf[p->col++] = 8;
-               p->buf[p->col++] = word[i];
+void
+term_setwidth(struct termp *p, const char *wstr)
+{
+       struct roffsu    su;
+       size_t           width;
+       int              iop;
+
+       iop = 0;
+       width = 0;
+       if (NULL != wstr) {
+               switch (*wstr) {
+               case '+':
+                       iop = 1;
+                       wstr++;
+                       break;
+               case '-':
+                       iop = -1;
+                       wstr++;
+                       break;
+               default:
+                       break;
+               }
+               if (a2roffsu(wstr, &su, SCALE_MAX))
+                       width = term_hspan(p, &su);
+               else
+                       iop = 0;

        }
        }

+       (*p->setwidth)(p, iop, width);

 }
 
 size_t
 }
 
 size_t


@@ -635,7 +662,8 @@ term_strlen(const struct termp *p, const char *cp)
        int              ssz, skip, c;
        const char      *seq, *rhs;
        enum mandoc_esc  esc;
        int              ssz, skip, c;
        const char      *seq, *rhs;
        enum mandoc_esc  esc;

-       static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
+       static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
+                       ASCII_BREAK, '\0' };

 
        /*
         * Account for escaped sequences within string length
 
        /*
         * Account for escaped sequences within string length


@@ -650,9 +678,8 @@ term_strlen(const struct termp *p, const char *cp)
                for (i = 0; i < rsz; i++)
                        sz += cond_width(p, *cp++, &skip);
 
                for (i = 0; i < rsz; i++)
                        sz += cond_width(p, *cp++, &skip);
 

-               c = 0;

                switch (*cp) {
                switch (*cp) {

-               case ('\\'):
+               case '\\':

                        cp++;
                        esc = mandoc_escape(&cp, &seq, &ssz);
                        if (ESCAPE_ERROR == esc)
                        cp++;
                        esc = mandoc_escape(&cp, &seq, &ssz);
                        if (ESCAPE_ERROR == esc)


@@ -660,16 +687,16 @@ term_strlen(const struct termp *p, const char *cp)
 
                        if (TERMENC_ASCII != p->enc)
                                switch (esc) {
 
                        if (TERMENC_ASCII != p->enc)
                                switch (esc) {

-                               case (ESCAPE_UNICODE):
-                                       c = mchars_num2uc
-                                               (seq + 1, ssz - 1);
+                               case ESCAPE_UNICODE:
+                                       c = mchars_num2uc(seq + 1,
+                                           ssz - 1);

                                        if ('\0' == c)
                                                break;
                                        sz += cond_width(p, c, &skip);
                                        continue;
                                        if ('\0' == c)
                                                break;
                                        sz += cond_width(p, c, &skip);
                                        continue;

-                               case (ESCAPE_SPECIAL):
-                                       c = mchars_spec2cp
-                                               (p->symtab, seq, ssz);
+                               case ESCAPE_SPECIAL:
+                                       c = mchars_spec2cp(p->symtab,
+                                           seq, ssz);

                                        if (c <= 0)
                                                break;
                                        sz += cond_width(p, c, &skip);
                                        if (c <= 0)
                                                break;
                                        sz += cond_width(p, c, &skip);


@@ -681,17 +708,17 @@ term_strlen(const struct termp *p, const char *cp)
                        rhs = NULL;
 
                        switch (esc) {
                        rhs = NULL;
 
                        switch (esc) {

-                       case (ESCAPE_UNICODE):
+                       case ESCAPE_UNICODE:

                                sz += cond_width(p, '?', &skip);
                                break;
                                sz += cond_width(p, '?', &skip);
                                break;

-                       case (ESCAPE_NUMBERED):
+                       case ESCAPE_NUMBERED:

                                c = mchars_num2char(seq, ssz);
                                if ('\0' != c)
                                        sz += cond_width(p, c, &skip);
                                break;
                                c = mchars_num2char(seq, ssz);
                                if ('\0' != c)
                                        sz += cond_width(p, c, &skip);
                                break;

-                       case (ESCAPE_SPECIAL):
-                               rhs = mchars_spec2str
-                                       (p->symtab, seq, ssz, &rsz);
+                       case ESCAPE_SPECIAL:
+                               rhs = mchars_spec2str(p->symtab,
+                                   seq, ssz, &rsz);

 
                                if (ssz != 1 || rhs)
                                        break;
 
                                if (ssz != 1 || rhs)
                                        break;


@@ -699,7 +726,7 @@ term_strlen(const struct termp *p, const char *cp)
                                rhs = seq;
                                rsz = ssz;
                                break;
                                rhs = seq;
                                rsz = ssz;
                                break;

-                       case (ESCAPE_SKIPCHAR):
+                       case ESCAPE_SKIPCHAR:

                                skip = 1;
                                break;
                        default:
                                skip = 1;
                                break;
                        default:


@@ -717,13 +744,15 @@ term_strlen(const struct termp *p, const char *cp)
                        for (i = 0; i < rsz; i++)
                                sz += (*p->width)(p, *rhs++);
                        break;
                        for (i = 0; i < rsz; i++)
                                sz += (*p->width)(p, *rhs++);
                        break;

-               case (ASCII_NBRSP):
+               case ASCII_NBRSP:

                        sz += cond_width(p, ' ', &skip);
                        cp++;
                        break;
                        sz += cond_width(p, ' ', &skip);
                        cp++;
                        break;

-               case (ASCII_HYPH):
+               case ASCII_HYPH:

                        sz += cond_width(p, '-', &skip);
                        cp++;
                        sz += cond_width(p, '-', &skip);
                        cp++;

+                       /* FALLTHROUGH */
+               case ASCII_BREAK:

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


@@ -733,29 +762,28 @@ term_strlen(const struct termp *p, const char *cp)
        return(sz);
 }
 
        return(sz);
 }
 

-/* ARGSUSED */

 size_t
 term_vspan(const struct termp *p, const struct roffsu *su)
 {
        double           r;
 
        switch (su->unit) {
 size_t
 term_vspan(const struct termp *p, const struct roffsu *su)
 {
        double           r;
 
        switch (su->unit) {

-       case (SCALE_CM):
+       case SCALE_CM:

                r = su->scale * 2;
                break;
                r = su->scale * 2;
                break;

-       case (SCALE_IN):
+       case SCALE_IN:

                r = su->scale * 6;
                break;
                r = su->scale * 6;
                break;

-       case (SCALE_PC):
+       case SCALE_PC:

                r = su->scale;
                break;
                r = su->scale;
                break;

-       case (SCALE_PT):
+       case SCALE_PT:

                r = su->scale / 8;
                break;
                r = su->scale / 8;
                break;

-       case (SCALE_MM):
+       case SCALE_MM:

                r = su->scale / 1000;
                break;
                r = su->scale / 1000;
                break;

-       case (SCALE_VS):
+       case SCALE_VS:

                r = su->scale;
                break;
        default:
                r = su->scale;
                break;
        default:


@@ -765,8 +793,7 @@ term_vspan(const struct termp *p, const struct roffsu *su)
 
        if (r < 0.0)
                r = 0.0;
 
        if (r < 0.0)
                r = 0.0;

-       return(/* LINTED */(size_t)
-                       r);
+       return((size_t)r);

 }
 
 size_t
 }
 
 size_t


@@ -777,6 +804,5 @@ term_hspan(const struct termp *p, const struct roffsu *su)
        v = ((*p->hspan)(p, su));
        if (v < 0.0)
                v = 0.0;
        v = ((*p->hspan)(p, su));
        if (v < 0.0)
                v = 0.0;

-       return((size_t) /* LINTED */
-                       v);
+       return((size_t)v);

 }
 }