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-rw-r--r--usr/src/cmd/mandoc/term.c488
1 files changed, 320 insertions, 168 deletions
diff --git a/usr/src/cmd/mandoc/term.c b/usr/src/cmd/mandoc/term.c
index 1217d473ca..f67fcf9d95 100644
--- a/usr/src/cmd/mandoc/term.c
+++ b/usr/src/cmd/mandoc/term.c
@@ -1,4 +1,4 @@
-/* $Id: term.c,v 1.259 2017/01/08 18:16:58 schwarze Exp $ */
+/* $Id: term.c,v 1.274 2017/07/28 14:25:48 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -32,17 +32,31 @@
#include "main.h"
static size_t cond_width(const struct termp *, int, int *);
-static void adjbuf(struct termp *p, size_t);
+static void adjbuf(struct termp_col *, 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 endline(struct termp *);
void
-term_free(struct termp *p)
+term_setcol(struct termp *p, size_t maxtcol)
{
+ if (maxtcol > p->maxtcol) {
+ p->tcols = mandoc_recallocarray(p->tcols,
+ p->maxtcol, maxtcol, sizeof(*p->tcols));
+ p->maxtcol = maxtcol;
+ }
+ p->lasttcol = maxtcol - 1;
+ p->tcol = p->tcols;
+}
- free(p->buf);
+void
+term_free(struct termp *p)
+{
+ for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
+ free(p->tcol->buf);
+ free(p->tcols);
free(p->fontq);
free(p);
}
@@ -84,69 +98,54 @@ term_end(struct termp *p)
* 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,
+ * - TERMP_HANG: 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.
+ * - TERMP_NOPAD: Start writing at the current position,
+ * do not pad with blank characters up to the offset.
*/
void
term_flushln(struct termp *p)
{
- 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 */
- size_t j; /* temporary loop index for p->buf */
+ size_t j; /* temporary loop index for p->tcol->buf */
size_t jhy; /* last hyph before overflow w/r/t j */
size_t maxvis; /* output position of visible boundary */
-
- /*
- * 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.
- *
- * 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.
- */
- dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
- maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
-
- if (p->flags & TERMP_NOBREAK) {
- dv = p->maxrmargin > p->offset ?
- p->maxrmargin - p->offset : 0;
- bp = (int)dv > p->overstep ?
- dv - (size_t)p->overstep : 0;
- } else
- bp = maxvis;
-
- /*
- * Calculate the required amount of padding.
- */
- vbl = p->offset + p->overstep > p->viscol ?
- p->offset + p->overstep - p->viscol : 0;
-
+ int ntab; /* number of tabs to prepend */
+ int breakline; /* after this word */
+
+ vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
+ 0 : p->tcol->offset - p->viscol;
+ if (p->minbl && vbl < p->minbl)
+ vbl = p->minbl;
+ maxvis = p->tcol->rmargin > p->viscol + vbl ?
+ p->tcol->rmargin - p->viscol - vbl : 0;
+ bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
+ p->maxrmargin > p->viscol + vbl ?
+ p->maxrmargin - p->viscol - vbl : 0;
vis = vend = 0;
- i = 0;
- while (i < p->col) {
+ if ((p->flags & TERMP_MULTICOL) == 0)
+ p->tcol->col = 0;
+ while (p->tcol->col < p->tcol->lastcol) {
+
/*
* Handle literal tab characters: collapse all
* subsequent tabs into a single huge set of spaces.
*/
+
ntab = 0;
- while (i < p->col && '\t' == p->buf[i]) {
- vend = (vis / p->tabwidth + 1) * p->tabwidth;
+ while (p->tcol->col < p->tcol->lastcol &&
+ p->tcol->buf[p->tcol->col] == '\t') {
+ vend = term_tab_next(vis);
vbl += vend - vis;
vis = vend;
ntab++;
- i++;
+ p->tcol->col++;
}
/*
@@ -156,84 +155,98 @@ term_flushln(struct termp *p)
* space is printed according to regular spacing rules).
*/
- for (j = i, jhy = 0; j < p->col; j++) {
- if (' ' == p->buf[j] || '\t' == p->buf[j])
+ jhy = 0;
+ breakline = 0;
+ for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
+ if (p->tcol->buf[j] == '\n') {
+ if ((p->flags & TERMP_BRIND) == 0)
+ breakline = 1;
+ continue;
+ }
+ if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
break;
/* Back over the last printed character. */
- if (8 == p->buf[j]) {
+ if (p->tcol->buf[j] == '\b') {
assert(j);
- vend -= (*p->width)(p, p->buf[j - 1]);
+ vend -= (*p->width)(p, p->tcol->buf[j - 1]);
continue;
}
/* Regular word. */
/* Break at the hyphen point if we overrun. */
if (vend > vis && vend < bp &&
- (ASCII_HYPH == p->buf[j] ||
- ASCII_BREAK == p->buf[j]))
+ (p->tcol->buf[j] == ASCII_HYPH||
+ p->tcol->buf[j] == ASCII_BREAK))
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] = '-';
+ if (p->tcol->buf[j] == ASCII_HYPH)
+ p->tcol->buf[j] = '-';
- vend += (*p->width)(p, p->buf[j]);
+ vend += (*p->width)(p, p->tcol->buf[j]);
}
/*
* Find out whether we would exceed the right margin.
* If so, break to the next line.
*/
- if (vend > bp && 0 == jhy && vis > 0) {
+
+ if (vend > bp && jhy == 0 && vis > 0 &&
+ (p->flags & TERMP_BRNEVER) == 0) {
+ if (p->flags & TERMP_MULTICOL)
+ return;
+
+ endline(p);
vend -= vis;
- (*p->endline)(p);
- p->viscol = 0;
- if (TERMP_BRIND & p->flags) {
- vbl = p->rmargin;
- vend += p->rmargin;
- vend -= p->offset;
- } else
- vbl = p->offset;
- /* use pending tabs on the new line */
+ /* Use pending tabs on the new line. */
- if (0 < ntab)
- vbl += ntab * p->tabwidth;
+ vbl = 0;
+ while (ntab--)
+ vbl = term_tab_next(vbl);
- /*
- * Remove the p->overstep width.
- * Again, if p->overstep is negative,
- * sign extension does the right thing.
- */
+ /* Re-establish indentation. */
- bp += (size_t)p->overstep;
- p->overstep = 0;
+ if (p->flags & TERMP_BRIND)
+ vbl += p->tcol->rmargin;
+ else
+ vbl += p->tcol->offset;
+ maxvis = p->tcol->rmargin > vbl ?
+ p->tcol->rmargin - vbl : 0;
+ bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
+ p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
}
- /* Write out the [remaining] word. */
- for ( ; i < p->col; i++) {
- if (vend > bp && jhy > 0 && i > jhy)
+ /*
+ * Write out the rest of the word.
+ */
+
+ for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
+ if (vend > bp && jhy > 0 && p->tcol->col > jhy)
break;
- if ('\t' == p->buf[i])
+ if (p->tcol->buf[p->tcol->col] == '\n')
+ continue;
+ if (p->tcol->buf[p->tcol->col] == '\t')
break;
- if (' ' == p->buf[i]) {
- j = i;
- while (i < p->col && ' ' == p->buf[i])
- i++;
- dv = (i - j) * (*p->width)(p, ' ');
+ if (p->tcol->buf[p->tcol->col] == ' ') {
+ j = p->tcol->col;
+ while (p->tcol->col < p->tcol->lastcol &&
+ p->tcol->buf[p->tcol->col] == ' ')
+ p->tcol->col++;
+ dv = (p->tcol->col - j) * (*p->width)(p, ' ');
vbl += dv;
vend += dv;
break;
}
- if (ASCII_NBRSP == p->buf[i]) {
+ if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
vbl += (*p->width)(p, ' ');
continue;
}
- if (ASCII_BREAK == p->buf[i])
+ if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
continue;
/*
@@ -247,61 +260,83 @@ term_flushln(struct termp *p)
vbl = 0;
}
- (*p->letter)(p, p->buf[i]);
- if (8 == p->buf[i])
- p->viscol -= (*p->width)(p, p->buf[i-1]);
+ (*p->letter)(p, p->tcol->buf[p->tcol->col]);
+ if (p->tcol->buf[p->tcol->col] == '\b')
+ p->viscol -= (*p->width)(p,
+ p->tcol->buf[p->tcol->col - 1]);
else
- p->viscol += (*p->width)(p, p->buf[i]);
+ p->viscol += (*p->width)(p,
+ p->tcol->buf[p->tcol->col]);
}
vis = vend;
+
+ if (breakline == 0)
+ continue;
+
+ /* Explicitly requested output line break. */
+
+ if (p->flags & TERMP_MULTICOL)
+ return;
+
+ endline(p);
+ breakline = 0;
+ vis = vend = 0;
+
+ /* Re-establish indentation. */
+
+ vbl = p->tcol->offset;
+ maxvis = p->tcol->rmargin > vbl ?
+ p->tcol->rmargin - vbl : 0;
+ bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
+ p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
}
/*
* If there was trailing white space, it was not printed;
* so reset the cursor position accordingly.
*/
+
if (vis > vbl)
vis -= vbl;
else
vis = 0;
- p->col = 0;
- p->overstep = 0;
- p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
+ p->col = p->tcol->col = p->tcol->lastcol = 0;
+ p->minbl = p->trailspace;
+ p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
- if ( ! (TERMP_NOBREAK & p->flags)) {
- p->viscol = 0;
- (*p->endline)(p);
- return;
- }
-
- if (TERMP_HANG & p->flags) {
- p->overstep += (int)(p->offset + vis - p->rmargin +
- 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 there is a request to keep the columns together,
- * allow negative overstep when the column is not full.
- */
- if (p->trailspace && p->overstep < 0)
- p->overstep = 0;
- return;
-
- } else if (TERMP_DANGLE & p->flags)
+ if (p->flags & TERMP_MULTICOL)
return;
/* Trailing whitespace is significant in some columns. */
+
if (vis && vbl && (TERMP_BRTRSP & p->flags))
vis += vbl;
/* If the column was overrun, break the line. */
- if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
- (*p->endline)(p);
- p->viscol = 0;
+ if ((p->flags & TERMP_NOBREAK) == 0 ||
+ ((p->flags & TERMP_HANG) == 0 &&
+ vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
+ endline(p);
+}
+
+static void
+endline(struct termp *p)
+{
+ if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
+ p->mc = NULL;
+ p->flags &= ~TERMP_ENDMC;
+ }
+ if (p->mc != NULL) {
+ if (p->viscol && p->maxrmargin >= p->viscol)
+ (*p->advance)(p, p->maxrmargin - p->viscol + 1);
+ p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
+ term_word(p, p->mc);
+ p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
}
+ p->viscol = 0;
+ p->minbl = 0;
+ (*p->endline)(p);
}
/*
@@ -314,7 +349,7 @@ term_newln(struct termp *p)
{
p->flags |= TERMP_NOSPACE;
- if (p->col || p->viscol)
+ if (p->tcol->lastcol || p->viscol)
term_flushln(p);
}
@@ -330,6 +365,7 @@ term_vspace(struct termp *p)
term_newln(p);
p->viscol = 0;
+ p->minbl = 0;
if (0 < p->skipvsp)
p->skipvsp--;
else
@@ -397,30 +433,31 @@ term_fontpop(struct termp *p)
void
term_word(struct termp *p, const char *word)
{
+ struct roffsu su;
const char nbrsp[2] = { ASCII_NBRSP, 0 };
const char *seq, *cp;
int sz, uc;
- size_t ssz;
+ size_t csz, lsz, ssz;
enum mandoc_esc esc;
- if ( ! (TERMP_NOSPACE & p->flags)) {
- if ( ! (TERMP_KEEP & p->flags)) {
- bufferc(p, ' ');
- if (TERMP_SENTENCE & p->flags)
+ if ((p->flags & TERMP_NOBUF) == 0) {
+ if ((p->flags & TERMP_NOSPACE) == 0) {
+ if ((p->flags & TERMP_KEEP) == 0) {
bufferc(p, ' ');
- } else
- bufferc(p, ASCII_NBRSP);
+ if (p->flags & TERMP_SENTENCE)
+ bufferc(p, ' ');
+ } else
+ bufferc(p, ASCII_NBRSP);
+ }
+ if (p->flags & TERMP_PREKEEP)
+ p->flags |= TERMP_KEEP;
+ if (p->flags & TERMP_NONOSPACE)
+ p->flags |= TERMP_NOSPACE;
+ else
+ p->flags &= ~TERMP_NOSPACE;
+ p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
+ p->skipvsp = 0;
}
- if (TERMP_PREKEEP & p->flags)
- p->flags |= TERMP_KEEP;
-
- if ( ! (p->flags & TERMP_NONOSPACE))
- p->flags &= ~TERMP_NOSPACE;
- else
- p->flags |= TERMP_NOSPACE;
-
- p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
- p->skipvsp = 0;
while ('\0' != *word) {
if ('\\' != *word) {
@@ -479,12 +516,88 @@ term_word(struct termp *p, const char *word)
case ESCAPE_FONTPREV:
term_fontlast(p);
continue;
+ case ESCAPE_BREAK:
+ bufferc(p, '\n');
+ continue;
case ESCAPE_NOSPACE:
if (p->flags & TERMP_BACKAFTER)
p->flags &= ~TERMP_BACKAFTER;
else if (*word == '\0')
p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
continue;
+ case ESCAPE_HORIZ:
+ if (*seq == '|') {
+ seq++;
+ uc = -p->col;
+ } else
+ uc = 0;
+ if (a2roffsu(seq, &su, SCALE_EM) == NULL)
+ continue;
+ uc += term_hen(p, &su);
+ if (uc > 0)
+ while (uc-- > 0)
+ bufferc(p, ASCII_NBRSP);
+ else if (p->col > (size_t)(-uc))
+ p->col += uc;
+ else {
+ uc += p->col;
+ p->col = 0;
+ if (p->tcol->offset > (size_t)(-uc)) {
+ p->ti += uc;
+ p->tcol->offset += uc;
+ } else {
+ p->ti -= p->tcol->offset;
+ p->tcol->offset = 0;
+ }
+ }
+ continue;
+ case ESCAPE_HLINE:
+ if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
+ continue;
+ uc = term_hen(p, &su);
+ if (uc <= 0) {
+ if (p->tcol->rmargin <= p->tcol->offset)
+ continue;
+ lsz = p->tcol->rmargin - p->tcol->offset;
+ } else
+ lsz = uc;
+ if (*cp == seq[-1])
+ uc = -1;
+ else if (*cp == '\\') {
+ seq = cp + 1;
+ esc = mandoc_escape(&seq, &cp, &sz);
+ switch (esc) {
+ case ESCAPE_UNICODE:
+ uc = mchars_num2uc(cp + 1, sz - 1);
+ break;
+ case ESCAPE_NUMBERED:
+ uc = mchars_num2char(cp, sz);
+ break;
+ case ESCAPE_SPECIAL:
+ uc = mchars_spec2cp(cp, sz);
+ break;
+ default:
+ uc = -1;
+ break;
+ }
+ } else
+ uc = *cp;
+ if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
+ uc = '_';
+ if (p->enc == TERMENC_ASCII) {
+ cp = ascii_uc2str(uc);
+ csz = term_strlen(p, cp);
+ ssz = strlen(cp);
+ } else
+ csz = (*p->width)(p, uc);
+ while (lsz >= csz) {
+ if (p->enc == TERMENC_ASCII)
+ encode(p, cp, ssz);
+ else
+ encode1(p, uc);
+ lsz -= csz;
+ }
+ continue;
case ESCAPE_SKIPCHAR:
p->flags |= TERMP_BACKAFTER;
continue;
@@ -504,10 +617,12 @@ term_word(struct termp *p, const char *word)
}
}
/* Trim trailing backspace/blank pair. */
- if (p->col > 2 &&
- (p->buf[p->col - 1] == ' ' ||
- p->buf[p->col - 1] == '\t'))
- p->col -= 2;
+ if (p->tcol->lastcol > 2 &&
+ (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
+ p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
+ p->tcol->lastcol -= 2;
+ if (p->col > p->tcol->lastcol)
+ p->col = p->tcol->lastcol;
continue;
default:
continue;
@@ -532,25 +647,28 @@ term_word(struct termp *p, const char *word)
}
static void
-adjbuf(struct termp *p, size_t sz)
+adjbuf(struct termp_col *c, size_t sz)
{
-
- if (0 == p->maxcols)
- p->maxcols = 1024;
- while (sz >= p->maxcols)
- p->maxcols <<= 2;
-
- p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
+ if (c->maxcols == 0)
+ c->maxcols = 1024;
+ while (c->maxcols <= sz)
+ c->maxcols <<= 2;
+ c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
}
static void
bufferc(struct termp *p, char c)
{
-
- if (p->col + 1 >= p->maxcols)
- adjbuf(p, p->col + 1);
-
- p->buf[p->col++] = c;
+ if (p->flags & TERMP_NOBUF) {
+ (*p->letter)(p, c);
+ return;
+ }
+ if (p->col + 1 >= p->tcol->maxcols)
+ adjbuf(p->tcol, p->col + 1);
+ if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
+ p->tcol->buf[p->col] = c;
+ if (p->tcol->lastcol < ++p->col)
+ p->tcol->lastcol = p->col;
}
/*
@@ -563,31 +681,40 @@ encode1(struct termp *p, int c)
{
enum termfont f;
- if (p->col + 7 >= p->maxcols)
- adjbuf(p, p->col + 7);
+ if (p->flags & TERMP_NOBUF) {
+ (*p->letter)(p, c);
+ return;
+ }
+
+ if (p->col + 7 >= p->tcol->maxcols)
+ adjbuf(p->tcol, p->col + 7);
f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
p->fontq[p->fonti] : TERMFONT_NONE;
if (p->flags & TERMP_BACKBEFORE) {
- if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
+ if (p->tcol->buf[p->col - 1] == ' ' ||
+ p->tcol->buf[p->col - 1] == '\t')
p->col--;
else
- p->buf[p->col++] = 8;
+ p->tcol->buf[p->col++] = '\b';
p->flags &= ~TERMP_BACKBEFORE;
}
- if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
- p->buf[p->col++] = '_';
- p->buf[p->col++] = 8;
+ if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
+ p->tcol->buf[p->col++] = '_';
+ p->tcol->buf[p->col++] = '\b';
}
- if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
- if (ASCII_HYPH == c)
- p->buf[p->col++] = '-';
+ if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
+ if (c == ASCII_HYPH)
+ p->tcol->buf[p->col++] = '-';
else
- p->buf[p->col++] = c;
- p->buf[p->col++] = 8;
+ p->tcol->buf[p->col++] = c;
+ p->tcol->buf[p->col++] = '\b';
}
- p->buf[p->col++] = c;
+ if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
+ p->tcol->buf[p->col] = c;
+ if (p->tcol->lastcol < ++p->col)
+ p->tcol->lastcol = p->col;
if (p->flags & TERMP_BACKAFTER) {
p->flags |= TERMP_BACKBEFORE;
p->flags &= ~TERMP_BACKAFTER;
@@ -599,15 +726,24 @@ encode(struct termp *p, const char *word, size_t sz)
{
size_t i;
- if (p->col + 2 + (sz * 5) >= p->maxcols)
- adjbuf(p, p->col + 2 + (sz * 5));
+ if (p->flags & TERMP_NOBUF) {
+ for (i = 0; i < sz; i++)
+ (*p->letter)(p, word[i]);
+ return;
+ }
+
+ if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
+ adjbuf(p->tcol, p->col + 2 + (sz * 5));
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];
+ if (p->tcol->lastcol <= p->col ||
+ (word[i] != ' ' && word[i] != ASCII_NBRSP))
+ p->tcol->buf[p->col] = word[i];
+ p->col++;
/*
* Postpone the effect of \z while handling
@@ -621,6 +757,8 @@ encode(struct termp *p, const char *word, size_t sz)
}
}
}
+ if (p->tcol->lastcol < p->col)
+ p->tcol->lastcol = p->col;
}
void
@@ -644,7 +782,7 @@ term_setwidth(struct termp *p, const char *wstr)
default:
break;
}
- if (a2roffsu(wstr, &su, SCALE_MAX))
+ if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
width = term_hspan(p, &su);
else
iop = 0;
@@ -833,7 +971,7 @@ term_vspan(const struct termp *p, const struct roffsu *su)
}
/*
- * Convert a scaling width to basic units, rounding down.
+ * Convert a scaling width to basic units, rounding towards 0.
*/
int
term_hspan(const struct termp *p, const struct roffsu *su)
@@ -841,3 +979,17 @@ term_hspan(const struct termp *p, const struct roffsu *su)
return (*p->hspan)(p, su);
}
+
+/*
+ * Convert a scaling width to basic units, rounding to closest.
+ */
+int
+term_hen(const struct termp *p, const struct roffsu *su)
+{
+ int bu;
+
+ if ((bu = (*p->hspan)(p, su)) >= 0)
+ return (bu + 11) / 24;
+ else
+ return -((-bu + 11) / 24);
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-30 15:27:00 +0000