-/* $Id: mdocterm.c,v 1.23 2009/03/01 23:23:55 kristaps Exp $ */
+/* $Id: mdocterm.c,v 1.32 2009/03/04 14:41:40 kristaps Exp $ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-
#ifndef __OpenBSD__
#include <time.h>
#endif
#include "mmain.h"
#include "term.h"
-#define TERMSYM_RBRACK "]"
-#define TERMSYM_LBRACK "["
-#define TERMSYM_LARROW "<-"
-#define TERMSYM_RARROW "->"
-#define TERMSYM_UARROW "^"
-#define TERMSYM_DARROW "v"
-#define TERMSYM_LSQUOTE "`"
-#define TERMSYM_RSQUOTE "\'"
-#define TERMSYM_SQUOTE "\'"
-#define TERMSYM_LDQUOTE "``"
-#define TERMSYM_RDQUOTE "\'\'"
-#define TERMSYM_DQUOTE "\""
-#define TERMSYM_LT "<"
-#define TERMSYM_GT ">"
-#define TERMSYM_LE "<="
-#define TERMSYM_GE ">="
-#define TERMSYM_EQ "=="
-#define TERMSYM_NEQ "!="
-#define TERMSYM_ACUTE "\'"
-#define TERMSYM_GRAVE "`"
-#define TERMSYM_PI "pi"
-#define TERMSYM_PLUSMINUS "+="
-#define TERMSYM_INF "oo"
-#define TERMSYM_INF2 "infinity"
-#define TERMSYM_NAN "NaN"
-#define TERMSYM_BAR "|"
-#define TERMSYM_BULLET "o"
-
-#ifdef __NetBSD__
-#define xisspace(x) isspace((int)(x))
-#else
-#define xisspace(x) isspace((x))
-#endif
-
-enum termstyle {
- STYLE_CLEAR,
- STYLE_BOLD,
- STYLE_UNDERLINE
+struct termenc {
+ const char *enc;
+ int sym;
};
static void body(struct termp *,
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 termenc termenc1[] = {
+ { "\\", TERMSYM_SLASH },
+ { "\'", TERMSYM_RSQUOTE },
+ { "`", TERMSYM_LSQUOTE },
+ { "-", TERMSYM_HYPHEN },
+ { " ", TERMSYM_SPACE },
+ { ".", TERMSYM_PERIOD },
+ { "&", TERMSYM_BREAK },
+ { "e", TERMSYM_SLASH },
+ { "q", TERMSYM_DQUOTE },
+ { NULL, 0 }
+};
+
+static struct termenc termenc2[] = {
+ { "rB", TERMSYM_RBRACK },
+ { "lB", TERMSYM_LBRACK },
+ { "ra", TERMSYM_RANGLE },
+ { "la", TERMSYM_LANGLE },
+ { "Lq", TERMSYM_LDQUOTE },
+ { "lq", TERMSYM_LDQUOTE },
+ { "Rq", TERMSYM_RDQUOTE },
+ { "rq", TERMSYM_RDQUOTE },
+ { "oq", TERMSYM_LSQUOTE },
+ { "aq", TERMSYM_RSQUOTE },
+
+ { "<-", TERMSYM_LARROW },
+ { "->", TERMSYM_RARROW },
+ { "ua", TERMSYM_UARROW },
+ { "da", TERMSYM_DARROW },
+
+ { "bu", TERMSYM_BULLET },
+ { "Ba", TERMSYM_BAR },
+ { "ba", TERMSYM_BAR },
+ { "co", TERMSYM_COPY },
+ { "Am", TERMSYM_AMP },
+
+ { "Le", TERMSYM_LE },
+ { "<=", TERMSYM_LE },
+ { "Ge", TERMSYM_GE },
+ { ">=", TERMSYM_GE },
+ { "==", TERMSYM_EQ },
+ { "Ne", TERMSYM_NEQ },
+ { "!=", TERMSYM_NEQ },
+ { "Pm", TERMSYM_PLUSMINUS },
+ { "+-", TERMSYM_PLUSMINUS },
+ { "If", TERMSYM_INF2 },
+ { "if", TERMSYM_INF },
+ { "Na", TERMSYM_NAN },
+ { "na", TERMSYM_NAN },
+ { "**", TERMSYM_ASTERISK },
+ { "Gt", TERMSYM_GT },
+ { "Lt", TERMSYM_LT },
+
+ { "aa", TERMSYM_ACUTE },
+ { "ga", TERMSYM_GRAVE },
+
+ { "en", TERMSYM_EN },
+ { "em", TERMSYM_EM },
+
+ { "Pi", TERMSYM_PI },
+ { NULL, 0 }
+};
+
+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_AMP */
+ { "--", 2 }, /* TERMSYM_EM */
+ { "-", 1 }, /* TERMSYM_EN */
+ { "(C)", 3 }, /* TERMSYM_COPY */
+ { "*", 1 }, /* TERMSYM_ASTERISK */
+ { "\\", 1 }, /* TERMSYM_SLASH */
+ { "-", 1 }, /* TERMSYM_HYPHEN */
+ { " ", 1 }, /* TERMSYM_SPACE */
+ { ".", 1 }, /* TERMSYM_PERIOD */
+ { "", 0 }, /* TERMSYM_BREAK */
+ { "<", 1 }, /* TERMSYM_LANGLE */
+ { ">", 1 }, /* TERMSYM_RANGLE */
+};
+
+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 = 78; /* XXX */
- termp.rmargin = termp.maxrmargin;
+ termp.maxrmargin = termp.rmargin = 78; /* XXX */
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_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) {
- 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
* space is printed according to regular spacing rules).
*/
+ /* 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);
}
/*
- * If we're breaking normally...
- *
- * 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).
- *
- * If we're not breaking...
- *
- * Don't let the visible size exceed the full margin.
+ * 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 ( ! (TERMP_NOBREAK & p->flags)) {
- if (vis && vis + vsz > maxvis) {
+ if (vis && vis + vsz > bp) {
putchar('\n');
for (j = 0; j < p->offset; j++)
putchar(' ');
vis = 0;
- } else if (vis + vsz > maxvis)
- errx(1, "word breaks right margin");
- } else if (vis + vsz > p->maxrmargin)
- errx(1, "word breaks right margin");
+ } 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 - p->offset;
+ } 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(' ');
+ if ( ! (TERMP_NONOBREAK & p->flags)) {
+ putchar('\n');
+ for (i = 0; i < p->rmargin; i++)
+ putchar(' ');
+ }
p->col = 0;
return;
}
*/
if (p->flags & TERMP_NOBREAK) {
- for ( ; vis < maxvis; vis++)
- putchar(' ');
+ if ( ! (TERMP_NONOBREAK & p->flags))
+ for ( ; vis < maxvis; vis++)
+ putchar(' ');
} else
putchar('\n');
}
+/*
+ * 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)
-{
-
- /*
- * Insert a single character into the line-buffer. If the
- * buffer's space is exceeded, then allocate more space.
- */
- 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;
-}
-
-
-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 (1):
- if ('q' == word[0])
- stringa(p, TERMSYM_DQUOTE);
- break;
- case (2):
- if ('r' == word[0] && 'B' == word[1])
- stringa(p, TERMSYM_RBRACK);
- else if ('l' == word[0] && 'B' == word[1])
- stringa(p, TERMSYM_LBRACK);
- else if ('l' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_LDQUOTE);
- else if ('r' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_RDQUOTE);
- else if ('o' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_LSQUOTE);
- else if ('a' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_RSQUOTE);
- else if ('<' == word[0] && '-' == word[1])
- stringa(p, TERMSYM_LARROW);
- else if ('-' == word[0] && '>' == word[1])
- stringa(p, TERMSYM_RARROW);
- else if ('b' == word[0] && 'u' == word[1])
- stringa(p, TERMSYM_BULLET);
- else if ('<' == word[0] && '=' == word[1])
- stringa(p, TERMSYM_LE);
- else if ('>' == word[0] && '=' == word[1])
- stringa(p, TERMSYM_GE);
- else if ('=' == word[0] && '=' == word[1])
- stringa(p, TERMSYM_EQ);
- else if ('+' == word[0] && '-' == word[1])
- stringa(p, TERMSYM_PLUSMINUS);
- else if ('u' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_UARROW);
- else if ('d' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_DARROW);
- else if ('a' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_ACUTE);
- else if ('g' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_GRAVE);
- else if ('!' == word[0] && '=' == word[1])
- stringa(p, TERMSYM_NEQ);
- else if ('i' == word[0] && 'f' == word[1])
- stringa(p, TERMSYM_INF);
- else if ('n' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_NAN);
- else if ('b' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_BAR);
-
- /* Deprecated forms. */
- else if ('B' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_BAR);
- else if ('I' == word[0] && 'f' == word[1])
- stringa(p, TERMSYM_INF2);
- else if ('G' == word[0] && 'e' == word[1])
- stringa(p, TERMSYM_GE);
- else if ('G' == word[0] && 't' == word[1])
- stringa(p, TERMSYM_GT);
- else if ('L' == word[0] && 'e' == word[1])
- stringa(p, TERMSYM_LE);
- else if ('L' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_LDQUOTE);
- else if ('L' == word[0] && 't' == word[1])
- stringa(p, TERMSYM_LT);
- else if ('N' == word[0] && 'a' == word[1])
- stringa(p, TERMSYM_NAN);
- else if ('N' == word[0] && 'e' == word[1])
- stringa(p, TERMSYM_NEQ);
- else if ('P' == word[0] && 'i' == word[1])
- stringa(p, TERMSYM_PI);
- else if ('P' == word[0] && 'm' == word[1])
- stringa(p, TERMSYM_PLUSMINUS);
- else if ('R' == word[0] && 'q' == word[1])
- stringa(p, TERMSYM_RDQUOTE);
- 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);
-
- /*
- * Handle an escape sequence. This must manage both groff-style
- * escapes and mdoc-style escapes.
- */
-
- if ('(' == word[*i]) {
- /* Two-character escapes. */
- (*i)++;
- assert(*i + 1 < len);
- nescape(p, &word[*i], 2);
- (*i)++;
- return;
-
- } else if ('*' == word[*i]) {
- (*i)++;
- assert(*i < len);
- switch (word[*i]) {
- case ('('):
- (*i)++;
- assert(*i + 1 < len);
- nescape(p, &word[*i], 2);
- (*i)++;
- return;
- default:
- break;
- }
- nescape(p, &word[*i], 1);
- 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]);
- break;
- case ('e'):
- chara(p, '\\');
- break;
- 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;
-
- /*
- * 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.
- */
-
- if ( ! (p->flags & TERMP_NOSPACE) &&
- ! (p->flags & TERMP_LITERAL))
- 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)
- 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)
{
size_t i, j, len;
- /*
- * Break apart a word into tokens. If we're a literal word,
- * then don't. This doesn't handle zero-length words (there
- * should be none) and makes sure that pword doesn't get spaces
- * or nil words unless literal.
- */
-
if (p->flags & TERMP_LITERAL) {
pword(p, word, strlen(word));
return;
/* 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 && xisspace(word[i]) && '\\' == word[i - 1]) {
+ if (i > 0 && isspace((int)word[i]) &&
+ '\\' == word[i - 1]) {
j++;
continue;
}
}
+/*
+ * 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,
int dochild;
struct termpair pair;
- /*
- * This is the main function for printing out nodes. It's
- * constituted of PRE and POST functions, which correspond to
- * prefix and infix processing.
- */
-
/* Pre-processing. */
dochild = 1;
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)
+{
+ struct termenc *enc;
+
+ switch (len) {
+ case (1):
+ enc = termenc1;
+ break;
+ case (2):
+ enc = termenc2;
+ break;
+ default:
+ warnx("unsupported %zu-byte escape sequence", len);
+ return;
+ }
+
+ for ( ; enc->enc; enc++)
+ if (0 == memcmp(enc->enc, word, len)) {
+ symbola(p, enc->sym);
+ return;
+ }
+
+ warnx("unsupported %zu-byte escape sequence", len);
+}
+
+
+/*
+ * 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;
+
+ if (0 == sz)
+ return;
+
+ 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