-/* $Id: mdocterm.c,v 1.13 2009/02/25 17:02:47 kristaps Exp $ */
+/* $Id: mdocterm.c,v 1.26 2009/03/02 17:29:16 kristaps Exp $ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
+#include <sys/utsname.h>
+
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-
#ifndef __OpenBSD__
#include <time.h>
#endif
#include "mmain.h"
#include "term.h"
-#ifdef __NetBSD__
-#define xisspace(x) isspace((int)(x))
-#else
-#define xisspace(x) isspace((x))
-#endif
-
-enum termstyle {
- STYLE_CLEAR,
- STYLE_BOLD,
- STYLE_UNDERLINE
-};
-
static void body(struct termp *,
struct termpair *,
const struct mdoc_meta *,
const struct mdoc_meta *);
static void pword(struct termp *, const char *, size_t);
-static void pescape(struct termp *,
- const char *, size_t *, size_t);
-static void nescape(struct termp *,
+static void pescape(struct termp *, const char *,
+ size_t *, size_t);
+static void nescape(struct termp *,
const char *, size_t);
static void chara(struct termp *, char);
-static void stringa(struct termp *, const char *);
-static void style(struct termp *, enum termstyle);
+static void stringa(struct termp *,
+ const char *, size_t);
+static void symbola(struct termp *, enum tsym);
+static void stylea(struct termp *, enum tstyle);
#ifdef __linux__
extern size_t strlcat(char *, const char *, size_t);
extern size_t strlcpy(char *, const char *, size_t);
#endif
+static struct termsym termsym_ansi[] = {
+ { "]", 1 }, /* TERMSYM_RBRACK */
+ { "[", 1 }, /* TERMSYM_LBRACK */
+ { "<-", 2 }, /* TERMSYM_LARROW */
+ { "->", 2 }, /* TERMSYM_RARROW */
+ { "^", 1 }, /* TERMSYM_UARROW */
+ { "v", 1 }, /* TERMSYM_DARROW */
+ { "`", 1 }, /* TERMSYM_LSQUOTE */
+ { "\'", 1 }, /* TERMSYM_RSQUOTE */
+ { "\'", 1 }, /* TERMSYM_SQUOTE */
+ { "``", 2 }, /* TERMSYM_LDQUOTE */
+ { "\'\'", 2 }, /* TERMSYM_RDQUOTE */
+ { "\"", 1 }, /* TERMSYM_DQUOTE */
+ { "<", 1 }, /* TERMSYM_LT */
+ { ">", 1 }, /* TERMSYM_GT */
+ { "<=", 2 }, /* TERMSYM_LE */
+ { ">=", 2 }, /* TERMSYM_GE */
+ { "==", 2 }, /* TERMSYM_EQ */
+ { "!=", 2 }, /* TERMSYM_NEQ */
+ { "\'", 1 }, /* TERMSYM_ACUTE */
+ { "`", 1 }, /* TERMSYM_GRAVE */
+ { "pi", 2 }, /* TERMSYM_PI */
+ { "+=", 2 }, /* TERMSYM_PLUSMINUS */
+ { "oo", 2 }, /* TERMSYM_INF */
+ { "infinity", 8 }, /* TERMSYM_INF2 */
+ { "NaN", 3 }, /* TERMSYM_NAN */
+ { "|", 1 }, /* TERMSYM_BAR */
+ { "o", 1 }, /* TERMSYM_BULLET */
+ { "&", 1 }, /* TERMSYM_AND */
+ { "|", 1 }, /* TERMSYM_OR */
+};
+
+static const char ansi_clear[] = { 27, '[', '0', 'm' };
+static const char ansi_bold[] = { 27, '[', '1', 'm' };
+static const char ansi_under[] = { 27, '[', '4', 'm' };
+
+static struct termsym termstyle_ansi[] = {
+ { ansi_clear, 4 },
+ { ansi_bold, 4 },
+ { ansi_under, 4 }
+};
+
int
main(int argc, char *argv[])
if (NULL == (mdoc = mmain_mdoc(p)))
mmain_exit(p, 1);
- termp.maxrmargin = 80; /* XXX */
+ termp.maxrmargin = 78; /* XXX */
termp.rmargin = termp.maxrmargin;
termp.maxcols = 1024;
termp.offset = termp.col = 0;
termp.flags = TERMP_NOSPACE;
+ termp.symtab = termsym_ansi;
+ termp.styletab = termstyle_ansi;
if (NULL == (termp.buf = malloc(termp.maxcols)))
err(1, "malloc");
}
+/*
+ * 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.
+ *
+ * Specifically, a line is whatever's in p->buf of length p->col, which
+ * is zeroed after this function returns.
+ *
+ * The variables TERMP_NOLPAD, TERMP_LITERAL and TERMP_NOBREAK are of
+ * critical importance here. Their behaviour follows:
+ *
+ * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
+ * offset value. This is useful when doing columnar lists where the
+ * prior column has right-padded.
+ *
+ * - TERMP_LITERAL: don't break apart words. Note that a long literal
+ * word will violate the right margin.
+ *
+ * - TERMP_NOBREAK: this is the most important and is used when making
+ * columns. In short: don't print a newline and instead pad to the
+ * right margin. Used in conjunction with TERMP_NOLPAD.
+ *
+ * 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. Extremely long
+ * lines will cause the system to emit a warning (TODO: hyphenate, if
+ * possible).
+ */
void
flushln(struct termp *p)
{
- size_t i, j, vsz, vis, maxvis;
+ size_t i, j, vsz, vis, maxvis, mmax, bp;
/*
* First, establish the maximum columns of "visible" content.
assert(p->offset < p->rmargin);
maxvis = p->rmargin - p->offset;
+ mmax = p->maxrmargin - p->offset;
+ bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
vis = 0;
/*
for (j = 0; j < p->offset; j++)
putchar(' ');
- /*
- * If we're literal, print out verbatim.
- */
- if (p->flags & TERMP_LITERAL) {
- /* FIXME: count non-printing chars. */
- for (i = 0; i < p->col; i++)
- putchar(p->buf[i]);
- putchar('\n');
- p->col = 0;
- return;
- }
-
for (i = 0; i < p->col; i++) {
/*
* Count up visible word characters. Control sequences
- * (starting with the CSI) aren't counted.
+ * (starting with the CSI) aren't counted. A space
+ * generates a non-printing word, which is valid (the
+ * space is printed according to regular spacing rules).
*/
- assert( ! xisspace(p->buf[i]));
+
+ /* FIXME: make non-ANSI friendly. */
/* LINTED */
for (j = i, vsz = 0; j < p->col; j++) {
- if (xisspace(p->buf[j]))
+ if (isspace((int)p->buf[j]))
break;
else if (27 == p->buf[j]) {
assert(j + 4 <= p->col);
} else
vsz++;
}
- assert(vsz > 0);
/*
- * If a word is too long and we're within a line, put it
- * on the next line. Puke if we're being asked to write
- * something that will exceed the right margin (i.e.,
- * from a fresh line or when we're not allowed to break
- * the line with TERMP_NOBREAK).
+ * Do line-breaking. If we're greater than our
+ * break-point and already in-line, break to the next
+ * line and start writing. If we're at the line start,
+ * then write out the word (TODO: hyphenate) and break
+ * in a subsequent loop invocation.
*/
- if (vis && vis + vsz >= maxvis) {
- /* FIXME */
- if (p->flags & TERMP_NOBREAK)
- errx(1, "word breaks right margin");
- putchar('\n');
- for (j = 0; j < p->offset; j++)
- putchar(' ');
- vis = 0;
- } else if (vis + vsz >= maxvis)
- /* FIXME */
- errx(1, "word breaks right margin");
+ if ( ! (TERMP_NOBREAK & p->flags)) {
+ if (vis && vis + vsz > bp) {
+ putchar('\n');
+ for (j = 0; j < p->offset; j++)
+ putchar(' ');
+ vis = 0;
+ } else if (vis + vsz > bp)
+ warnx("word breaks right margin");
+
+ /* TODO: hyphenate. */
+
+ } else {
+ if (vis && vis + vsz > bp) {
+ putchar('\n');
+ for (j = 0; j < p->rmargin; j++)
+ putchar(' ');
+ vis = p->rmargin;
+ } else if (vis + vsz > bp)
+ warnx("word breaks right margin");
+
+ /* TODO: hyphenate. */
+ }
/*
* Write out the word and a trailing space. Omit the
- * space if we're the last word in the line.
+ * space if we're the last word in the line or beyond
+ * our breakpoint.
*/
for ( ; i < p->col; i++) {
- if (xisspace(p->buf[i]))
+ if (isspace((int)p->buf[i]))
break;
putchar(p->buf[i]);
}
vis += vsz;
- if (i < p->col) {
+ if (i < p->col && vis <= bp) {
putchar(' ');
vis++;
}
}
+ /*
+ * If we've overstepped our maximum visible no-break space, then
+ * cause a newline and offset at the right margin.
+ */
+
+ if ((TERMP_NOBREAK & p->flags) && vis >= maxvis) {
+ putchar('\n');
+ for (i = 0; i < p->rmargin; i++)
+ putchar(' ');
+ p->col = 0;
+ return;
+ }
+
/*
* If we're not to right-marginalise it (newline), then instead
* pad to the right margin and stay off.
}
+/*
+ * 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.
+ */
void
newln(struct termp *p)
{
- /*
- * A newline only breaks an existing line; it won't assert
- * vertical space.
- */
p->flags |= TERMP_NOSPACE;
if (0 == p->col) {
p->flags &= ~TERMP_NOLPAD;
}
+/*
+ * 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.
+ * All data in the output buffer is flushed prior to the newline
+ * assertion.
+ */
void
vspace(struct termp *p)
{
- /*
- * Asserts a vertical space (a full, empty line-break between
- * lines).
- */
newln(p);
putchar('\n');
}
-static void
-stringa(struct termp *p, const char *s)
-{
-
- /* XXX - speed up if not passing to chara. */
- for ( ; *s; s++)
- chara(p, *s);
-}
-
-
-static void
-chara(struct termp *p, char c)
-{
-
- /* TODO: dynamically expand the buffer. */
- if (p->col + 1 >= p->maxcols)
- errx(1, "line overrun");
- p->buf[(p->col)++] = c;
-}
-
-
-static void
-style(struct termp *p, enum termstyle esc)
-{
-
- if (p->col + 4 >= p->maxcols)
- errx(1, "line overrun");
-
- p->buf[(p->col)++] = 27;
- p->buf[(p->col)++] = '[';
- switch (esc) {
- case (STYLE_CLEAR):
- p->buf[(p->col)++] = '0';
- break;
- case (STYLE_BOLD):
- p->buf[(p->col)++] = '1';
- break;
- case (STYLE_UNDERLINE):
- p->buf[(p->col)++] = '4';
- break;
- default:
- abort();
- /* NOTREACHED */
- }
- p->buf[(p->col)++] = 'm';
-}
-
-
-static void
-nescape(struct termp *p, const char *word, size_t len)
-{
-
- switch (len) {
- case (2):
- if ('r' == word[0] && 'B' == word[1])
- chara(p, ']');
- else if ('l' == word[0] && 'B' == word[1])
- chara(p, '[');
- else if ('<' == word[0] && '-' == word[1])
- stringa(p, "<-");
- else if ('-' == word[0] && '>' == word[1])
- stringa(p, "->");
- else if ('l' == word[0] && 'q' == word[1])
- chara(p, '\"');
- else if ('r' == word[0] && 'q' == word[1])
- chara(p, '\"');
- else if ('b' == word[0] && 'u' == word[1])
- chara(p, 'o');
- break;
- default:
- break;
- }
-}
-
-
-static void
-pescape(struct termp *p, const char *word, size_t *i, size_t len)
-{
- size_t j;
-
- (*i)++;
- assert(*i < len);
-
- if ('(' == word[*i]) {
- /* Two-character escapes. */
- (*i)++;
- assert(*i + 1 < len);
- nescape(p, &word[*i], 2);
- (*i)++;
- return;
-
- } else if ('[' != word[*i]) {
- /* One-character escapes. */
- switch (word[*i]) {
- case ('\\'):
- /* FALLTHROUGH */
- case ('\''):
- /* FALLTHROUGH */
- case ('`'):
- /* FALLTHROUGH */
- case ('-'):
- /* FALLTHROUGH */
- case (' '):
- /* FALLTHROUGH */
- case ('.'):
- chara(p, word[*i]);
- default:
- break;
- }
- return;
- }
-
- (*i)++;
- for (j = 0; word[*i] && ']' != word[*i]; (*i)++, j++)
- /* Loop... */ ;
-
- nescape(p, &word[*i - j], j);
-}
-
-
-static void
-pword(struct termp *p, const char *word, size_t len)
-{
- size_t i;
-
- /*assert(len > 0);*/ /* Can be, if literal. */
-
- if ( ! (p->flags & TERMP_NOSPACE) &&
- ! (p->flags & TERMP_LITERAL))
- chara(p, ' ');
-
- if ( ! (p->flags & TERMP_NONOSPACE))
- p->flags &= ~TERMP_NOSPACE;
-
- if (p->flags & TERMP_BOLD)
- style(p, STYLE_BOLD);
- if (p->flags & TERMP_UNDERLINE)
- style(p, STYLE_UNDERLINE);
-
- for (i = 0; i < len; i++) {
- if ('\\' == word[i]) {
- pescape(p, word, &i, len);
- continue;
- }
- chara(p, word[i]);
- }
-
- if (p->flags & TERMP_BOLD ||
- p->flags & TERMP_UNDERLINE)
- style(p, STYLE_CLEAR);
-}
-
-
+/*
+ * Break apart a word into "pwords" (partial-words, usually from
+ * breaking up a phrase into individual words) and, eventually, put them
+ * into the output buffer. If we're a literal word, then don't break up
+ * the word and put it verbatim into the output buffer.
+ */
void
word(struct termp *p, const char *word)
{
/* LINTED */
for (j = i = 0; i < len; i++) {
- if ( ! xisspace(word[i])) {
+ if ( ! isspace((int)word[i])) {
+ j++;
+ continue;
+ }
+
+ /* Escaped spaces don't delimit... */
+ if (i > 0 && isspace((int)word[i]) &&
+ '\\' == word[i - 1]) {
j++;
continue;
}
+
if (0 == j)
continue;
assert(i >= j);
}
+/*
+ * This is the main function for printing out nodes. It's constituted
+ * of PRE and POST functions, which correspond to prefix and infix
+ * processing. The termpair structure allows data to persist between
+ * prefix and postfix invocations.
+ */
static void
body(struct termp *p, struct termpair *ppair,
const struct mdoc_meta *meta,
{
struct tm *tm;
char *buf, *os;
- size_t sz, osz, ssz, i;
if (NULL == (buf = malloc(p->rmargin)))
err(1, "malloc");
#endif
err(1, "strftime");
- osz = strlcpy(os, meta->os, p->rmargin);
+ (void)strlcpy(os, meta->os, p->rmargin);
+
+ /*
+ * This is /slightly/ different from regular groff output
+ * because we don't have page numbers. Print the following:
+ *
+ * OS MDOCDATE
+ */
- sz = strlen(buf);
- ssz = sz + osz + 1;
+ vspace(p);
- if (ssz > p->rmargin) {
- ssz -= p->rmargin;
- assert(ssz <= osz);
- os[osz - ssz] = 0;
- ssz = 1;
- } else
- ssz = p->rmargin - ssz + 1;
+ p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
+ p->rmargin = p->maxrmargin - strlen(buf);
+ p->offset = 0;
- printf("\n");
- printf("%s", os);
- for (i = 0; i < ssz; i++)
- printf(" ");
+ word(p, os);
+ flushln(p);
+
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
+ p->offset = p->rmargin;
+ p->rmargin = p->maxrmargin;
+ p->flags &= ~TERMP_NOBREAK;
- printf("%s\n", buf);
- fflush(stdout);
+ word(p, buf);
+ flushln(p);
free(buf);
free(os);
static void
header(struct termp *p, const struct mdoc_meta *meta)
{
- char *buf, *title;
+ char *buf, *title, *bufp, *vbuf;
const char *pp;
+ struct utsname uts;
+
+ p->rmargin = p->maxrmargin;
+ p->offset = 0;
if (NULL == (buf = malloc(p->rmargin)))
err(1, "malloc");
if (NULL == (title = malloc(p->rmargin)))
err(1, "malloc");
+ if (NULL == (vbuf = malloc(p->rmargin)))
+ err(1, "malloc");
- if (NULL == (pp = mdoc_vol2a(meta->vol)))
+ if (NULL == (pp = mdoc_vol2a(meta->vol))) {
switch (meta->msec) {
case (MSEC_1):
/* FALLTHROUGH */
pp = mdoc_vol2a(VOL_KM);
break;
default:
- /* FIXME: capitalise. */
- if (NULL == (pp = mdoc_msec2a(meta->msec)))
- pp = mdoc_msec2a(MSEC_local);
break;
}
+ }
+ vbuf[0] = 0;
+
+ if (pp) {
+ if (-1 == uname(&uts))
+ err(1, "uname");
+ (void)strlcat(vbuf, uts.sysname, p->rmargin);
+ (void)strlcat(vbuf, " ", p->rmargin);
+ } else if (NULL == (pp = mdoc_msec2a(meta->msec)))
+ pp = mdoc_msec2a(MSEC_local);
+
+ (void)strlcat(vbuf, pp, p->rmargin);
+
+ /*
+ * The header is strange. It has three components, which are
+ * really two with the first duplicated. It goes like this:
+ *
+ * IDENTIFIER TITLE IDENTIFIER
+ *
+ * The IDENTIFIER is NAME(SECTION), which is the command-name
+ * (if given, or "unknown" if not) followed by the manual page
+ * section. These are given in `Dt'. The TITLE is a free-form
+ * string depending on the manual volume. If not specified, it
+ * switches on the manual section.
+ */
if (mdoc_arch2a(meta->arch))
- (void)snprintf(buf, p->rmargin, "%s(%s)",
- pp, mdoc_arch2a(meta->arch));
+ (void)snprintf(buf, p->rmargin, "%s (%s)",
+ vbuf, mdoc_arch2a(meta->arch));
else
- (void)strlcpy(buf, pp, p->rmargin);
+ (void)strlcpy(buf, vbuf, p->rmargin);
pp = mdoc_msec2a(meta->msec);
(void)snprintf(title, p->rmargin, "%s(%s)",
meta->title, pp ? pp : "");
+ for (bufp = title; *bufp; bufp++)
+ *bufp = toupper(*bufp);
+
p->offset = 0;
p->rmargin = (p->maxrmargin - strlen(buf)) / 2;
- p->flags |= TERMP_NOBREAK;
- p->flags |= TERMP_NOSPACE;
+ p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
word(p, title);
flushln(p);
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
p->offset = p->rmargin;
- p->rmargin += strlen(buf);
+ p->rmargin = p->maxrmargin - strlen(title);
word(p, buf);
flushln(p);
- exit(1);
-
p->offset = p->rmargin;
p->rmargin = p->maxrmargin;
p->flags &= ~TERMP_NOBREAK;
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
word(p, title);
flushln(p);
p->flags &= ~TERMP_NOSPACE;
free(title);
+ free(vbuf);
free(buf);
}
+
+
+/*
+ * Determine the symbol indicated by an escape sequences, that is, one
+ * starting with a backslash. Once done, we pass this value into the
+ * output buffer by way of the symbol table.
+ */
+static void
+nescape(struct termp *p, const char *word, size_t len)
+{
+
+ switch (len) {
+ case (1):
+ switch (word[0]) {
+ case ('\\'):
+ /* FALLTHROUGH */
+ case ('\''):
+ /* FALLTHROUGH */
+ case ('`'):
+ /* FALLTHROUGH */
+ case ('-'):
+ /* FALLTHROUGH */
+ case (' '):
+ /* FALLTHROUGH */
+ case ('.'):
+ chara(p, word[0]); /* FIXME */
+ break;
+ case ('&'):
+ break;
+ case ('e'):
+ chara(p, '\\'); /* FIXME */
+ break;
+ case ('q'):
+ symbola(p, TERMSYM_DQUOTE);
+ break;
+ default:
+ warnx("escape sequence not supported: %c",
+ word[0]);
+ break;
+ }
+ break;
+
+ case (2):
+ if ('r' == word[0] && 'B' == word[1])
+ symbola(p, TERMSYM_RBRACK);
+ else if ('l' == word[0] && 'B' == word[1])
+ symbola(p, TERMSYM_LBRACK);
+ else if ('l' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_LDQUOTE);
+ else if ('r' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_RDQUOTE);
+ else if ('o' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_LSQUOTE);
+ else if ('a' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_RSQUOTE);
+ else if ('<' == word[0] && '-' == word[1])
+ symbola(p, TERMSYM_LARROW);
+ else if ('-' == word[0] && '>' == word[1])
+ symbola(p, TERMSYM_RARROW);
+ else if ('b' == word[0] && 'u' == word[1])
+ symbola(p, TERMSYM_BULLET);
+ else if ('<' == word[0] && '=' == word[1])
+ symbola(p, TERMSYM_LE);
+ else if ('>' == word[0] && '=' == word[1])
+ symbola(p, TERMSYM_GE);
+ else if ('=' == word[0] && '=' == word[1])
+ symbola(p, TERMSYM_EQ);
+ else if ('+' == word[0] && '-' == word[1])
+ symbola(p, TERMSYM_PLUSMINUS);
+ else if ('u' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_UARROW);
+ else if ('d' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_DARROW);
+ else if ('a' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_ACUTE);
+ else if ('g' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_GRAVE);
+ else if ('!' == word[0] && '=' == word[1])
+ symbola(p, TERMSYM_NEQ);
+ else if ('i' == word[0] && 'f' == word[1])
+ symbola(p, TERMSYM_INF);
+ else if ('n' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_NAN);
+ else if ('b' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_BAR);
+
+ /* Deprecated forms. */
+ else if ('A' == word[0] && 'm' == word[1])
+ symbola(p, TERMSYM_AMP);
+ else if ('B' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_BAR);
+ else if ('I' == word[0] && 'f' == word[1])
+ symbola(p, TERMSYM_INF2);
+ else if ('G' == word[0] && 'e' == word[1])
+ symbola(p, TERMSYM_GE);
+ else if ('G' == word[0] && 't' == word[1])
+ symbola(p, TERMSYM_GT);
+ else if ('L' == word[0] && 'e' == word[1])
+ symbola(p, TERMSYM_LE);
+ else if ('L' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_LDQUOTE);
+ else if ('L' == word[0] && 't' == word[1])
+ symbola(p, TERMSYM_LT);
+ else if ('N' == word[0] && 'a' == word[1])
+ symbola(p, TERMSYM_NAN);
+ else if ('N' == word[0] && 'e' == word[1])
+ symbola(p, TERMSYM_NEQ);
+ else if ('P' == word[0] && 'i' == word[1])
+ symbola(p, TERMSYM_PI);
+ else if ('P' == word[0] && 'm' == word[1])
+ symbola(p, TERMSYM_PLUSMINUS);
+ else if ('R' == word[0] && 'q' == word[1])
+ symbola(p, TERMSYM_RDQUOTE);
+ else
+ warnx("escape sequence not supported: %c%c",
+ word[0], word[1]);
+ break;
+
+ default:
+ warnx("escape sequence not supported");
+ break;
+ }
+}
+
+
+/*
+ * Handle an escape sequence: determine its length and pass it to the
+ * escape-symbol look table. Note that we assume mdoc(3) has validated
+ * the escape sequence (we assert upon badly-formed escape sequences).
+ */
+static void
+pescape(struct termp *p, const char *word, size_t *i, size_t len)
+{
+ size_t j;
+
+ (*i)++;
+ assert(*i < len);
+
+ if ('(' == word[*i]) {
+ (*i)++;
+ assert(*i + 1 < len);
+ nescape(p, &word[*i], 2);
+ (*i)++;
+ return;
+
+ } else if ('*' == word[*i]) {
+ /* XXX - deprecated! */
+ (*i)++;
+ assert(*i < len);
+ switch (word[*i]) {
+ case ('('):
+ (*i)++;
+ assert(*i + 1 < len);
+ nescape(p, &word[*i], 2);
+ (*i)++;
+ return;
+ case ('['):
+ break;
+ default:
+ nescape(p, &word[*i], 1);
+ return;
+ }
+
+ } else if ('[' != word[*i]) {
+ nescape(p, &word[*i], 1);
+ return;
+ }
+
+ (*i)++;
+ for (j = 0; word[*i] && ']' != word[*i]; (*i)++, j++)
+ /* Loop... */ ;
+
+ assert(word[*i]);
+ nescape(p, &word[*i - j], j);
+}
+
+
+/*
+ * 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
+ * handles word styling.
+ */
+static void
+pword(struct termp *p, const char *word, size_t len)
+{
+ size_t i;
+
+ if ( ! (TERMP_NOSPACE & p->flags) &&
+ ! (TERMP_LITERAL & p->flags))
+ chara(p, ' ');
+
+ if ( ! (p->flags & TERMP_NONOSPACE))
+ p->flags &= ~TERMP_NOSPACE;
+
+ /*
+ * XXX - if literal and underlining, this will underline the
+ * spaces between literal words.
+ */
+
+ if (p->flags & TERMP_BOLD)
+ stylea(p, TERMSTYLE_BOLD);
+ if (p->flags & TERMP_UNDERLINE)
+ stylea(p, TERMSTYLE_UNDER);
+
+ for (i = 0; i < len; i++) {
+ if ('\\' == word[i]) {
+ pescape(p, word, &i, len);
+ continue;
+ }
+ chara(p, word[i]);
+ }
+
+ if (p->flags & TERMP_BOLD ||
+ p->flags & TERMP_UNDERLINE)
+ stylea(p, TERMSTYLE_CLEAR);
+}
+
+
+/*
+ * Add a symbol to the output line buffer.
+ */
+static void
+symbola(struct termp *p, enum tsym sym)
+{
+
+ assert(p->symtab[sym].sym);
+ stringa(p, p->symtab[sym].sym, p->symtab[sym].sz);
+}
+
+
+/*
+ * Add a style to the output line buffer.
+ */
+static void
+stylea(struct termp *p, enum tstyle style)
+{
+
+ assert(p->styletab[style].sym);
+ stringa(p, p->styletab[style].sym, p->styletab[style].sz);
+}
+
+
+/*
+ * Like chara() but for arbitrary-length buffers. Resize the buffer by
+ * a factor of two (if the buffer is less than that) or the buffer's
+ * size.
+ */
+static void
+stringa(struct termp *p, const char *c, size_t sz)
+{
+ size_t s;
+
+ s = sz > p->maxcols * 2 ? sz : p->maxcols * 2;
+
+ assert(c);
+ if (p->col + sz >= p->maxcols) {
+ p->buf = realloc(p->buf, s);
+ if (NULL == p->buf)
+ err(1, "realloc");
+ p->maxcols = s;
+ }
+
+ (void)memcpy(&p->buf[p->col], c, sz);
+ p->col += sz;
+}
+
+
+/*
+ * Insert a single character into the line-buffer. If the buffer's
+ * space is exceeded, then allocate more space by doubling the buffer
+ * size.
+ */
+static void
+chara(struct termp *p, char c)
+{
+
+ if (p->col + 1 >= p->maxcols) {
+ p->buf = realloc(p->buf, p->maxcols * 2);
+ if (NULL == p->buf)
+ err(1, "malloc");
+ p->maxcols *= 2;
+ }
+ p->buf[(p->col)++] = c;
+}
git.ckatri.com / mandoc.git / blobdiff