Add demandoc utility, a replacement for deroff.

1 files changed, 180 insertions, 0 deletions

diff --git a/demandoc.c b/demandoc.c
new file mode 100644
index 00000000..da25f8f1
--- /dev/null
+++ b/demandoc.c
@@ -0,0 +1,180 @@
+/*	$Id: demandoc.c,v 1.1 2011/09/01 10:46:28 kristaps Exp $ */
+/*
+ * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "man.h"
+#include "mdoc.h"
+#include "mandoc.h"
+
+static	void	 pline(int, int *, int *);
+static	void	 pman(const struct man_node *, int *, int *);
+static	void	 pmandoc(struct mparse *, int, const char *);
+static	void	 pmdoc(const struct mdoc_node *, int *, int *);
+static	void	 pstring(const char *, int, int *);
+static	void	 usage(void);
+
+static	const char	 *progname;
+
+int
+main(int argc, char *argv[])
+{
+	struct mparse	*mp;
+	int		 ch, i;
+	extern int	 optind;
+	extern char	*optarg;
+
+	progname = strrchr(argv[0], '/');
+	if (progname == NULL)
+		progname = argv[0];
+	else
+		++progname;
+
+	mp = NULL;
+
+	while (-1 != (ch = getopt(argc, argv, "")))
+		switch (ch) {
+		default:
+			usage();
+			return((int)MANDOCLEVEL_BADARG);
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	mp = mparse_alloc(MPARSE_AUTO, MANDOCLEVEL_FATAL, NULL, NULL);
+	assert(mp);
+
+	if (0 == argc)
+		pmandoc(mp, STDIN_FILENO, "<stdin>");
+
+	for (i = 0; i < argc; i++) {
+		mparse_reset(mp);
+		pmandoc(mp, -1, argv[i]);
+	}
+
+	mparse_free(mp);
+	return(MANDOCLEVEL_OK);
+}
+
+static void
+usage(void)
+{
+
+	fprintf(stderr, "usage: %s [files...]\n", progname);
+}
+
+static void
+pmandoc(struct mparse *mp, int fd, const char *fn)
+{
+	struct mdoc	*mdoc;
+	struct man	*man;
+	int		 line, col;
+
+	if (mparse_readfd(mp, fd, fn) >= MANDOCLEVEL_FATAL) {
+		fprintf(stderr, "%s: Parse failure\n", fn);
+		return;
+	}
+
+	mparse_result(mp, &mdoc, &man);
+	line = 1;
+	col = 0;
+
+	if (mdoc) 
+		pmdoc(mdoc_node(mdoc), &line, &col);
+	else if (man)
+		pman(man_node(man), &line, &col);
+	else
+		return;
+
+	putchar('\n');
+}
+
+/*
+ * Strip the escapes out of a string, emitting the results.
+ */
+static void
+pstring(const char *p, int col, int *colp)
+{
+	enum mandoc_esc	 esc;
+
+	while (*colp < col) {
+		putchar(' ');
+		(*colp)++;
+	}
+
+	while ('\0' != *p) {
+		if ('\\' == *p) {
+			p++;
+			esc = mandoc_escape(&p, NULL, NULL);
+			if (ESCAPE_ERROR == esc)
+				return;
+		} else {
+			putchar(*p++);
+			(*colp)++;
+		}
+	}
+}
+
+/*
+ * Emit lines until we're in sync with our input.
+ */
+static void
+pline(int line, int *linep, int *col)
+{
+
+	while (*linep < line) {
+		putchar('\n');
+		(*linep)++;
+	}
+	*col = 0;
+}
+
+static void
+pmdoc(const struct mdoc_node *p, int *line, int *col)
+{
+
+	for ( ; p; p = p->next) {
+		if (MDOC_LINE & p->flags)
+			pline(p->line, line, col);
+		if (MDOC_TEXT == p->type)
+			pstring(p->string, p->pos, col);
+		if (p->child) 
+			pmdoc(p->child, line, col);
+	}
+}
+
+static void
+pman(const struct man_node *p, int *line, int *col)
+{
+
+	for ( ; p; p = p->next) {
+		if (MAN_LINE & p->flags)
+			pline(p->line, line, col);
+		if (MAN_TEXT == p->type)
+			pstring(p->string, p->pos, col);
+		if (p->child) 
+			pman(p->child, line, col);
+	}
+}