Preliminary xml output filter (validate-renamed) done.

1 files changed, 502 insertions, 0 deletions

diff --git a/xml.c b/xml.c
new file mode 100644
index 00000000..2e87ae44
--- /dev/null
+++ b/xml.c
@@ -0,0 +1,502 @@
+/* $Id: xml.c,v 1.1 2008/11/30 21:41:35 kristaps Exp $ */
+/*
+ * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
+ *
+ * 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.
+ */
+#include <sys/param.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libmdocml.h"
+#include "private.h"
+
+#define	INDENT		 4
+#define	COLUMNS		 60
+
+#ifdef	__linux__ /* FIXME */
+#define	strlcat		 strncat
+#endif
+
+enum	md_tok {
+	MD_BLKIN,
+	MD_BLKOUT,
+	MD_IN,
+	MD_OUT,
+	MD_TEXT
+};
+
+struct	md_xml {
+	const struct md_args	*args;
+	const struct md_rbuf	*rbuf;
+
+	struct md_mbuf	*mbuf;
+	struct rofftree	*tree;
+	size_t		 indent;
+	size_t		 pos;
+	enum md_tok	 last;
+	int		 flags;
+#define	MD_LITERAL	(1 << 0) /* FIXME */
+};
+
+static	void		 roffmsg(void *arg, enum roffmsg, 
+				const char *, const char *, char *);
+static	int		 roffhead(void *);
+static	int		 rofftail(void *);
+static	int		 roffin(void *, int, int *, char **);
+static	int		 roffdata(void *, int, char *);
+static	int		 roffout(void *, int);
+static	int		 roffblkin(void *, int, int *, char **);
+static	int		 roffblkout(void *, int);
+static	int		 roffspecial(void *, int);
+
+static	int		 mbuf_newline(struct md_xml *);
+static	int		 mbuf_indent(struct md_xml *);
+static	int		 mbuf_data(struct md_xml *, int, char *);
+static	int		 mbuf_putstring(struct md_xml *, 
+				const char *);
+static	int		 mbuf_nputstring(struct md_xml *, 
+				const char *, size_t);
+
+
+static int
+mbuf_putstring(struct md_xml *p, const char *buf)
+{
+
+	return(mbuf_nputstring(p, buf, strlen(buf)));
+}
+
+
+static int
+mbuf_nputstring(struct md_xml *p, const char *buf, size_t sz)
+{
+
+	p->pos += sz;
+	return(md_buf_puts(p->mbuf, buf, sz));
+}
+
+
+static int
+mbuf_indent(struct md_xml *p)
+{
+	size_t		 i;
+
+	assert(p->pos == 0);
+
+	/* LINTED */
+	for (i = 0; i < MIN(p->indent, INDENT); i++)
+		if ( ! md_buf_putstring(p->mbuf, "    "))
+			return(0);
+
+	p->pos += i * INDENT;
+	return(1);
+}
+
+
+static int
+mbuf_newline(struct md_xml *p)
+{
+
+	if ( ! md_buf_putchar(p->mbuf, '\n'))
+		return(0);
+
+	p->pos = 0;
+	return(1);
+}
+
+
+static int
+mbuf_data(struct md_xml *p, int space, char *buf)
+{
+	size_t		 sz;
+	char		*bufp;
+
+	assert(p->mbuf);
+	assert(0 != p->indent);
+
+	if (MD_LITERAL & p->flags)
+		return(mbuf_putstring(p, buf));
+
+	while (*buf) {
+		while (*buf && isspace(*buf))
+			buf++;
+
+		if (0 == *buf)
+			break;
+
+		bufp = buf;
+		while (*buf && ! isspace(*buf))
+			buf++;
+
+		if (0 != *buf)
+			*buf++ = 0;
+
+		sz = strlen(bufp);
+
+		if (0 == p->pos) {
+			if ( ! mbuf_indent(p))
+				return(0);
+			if ( ! mbuf_nputstring(p, bufp, sz))
+				return(0);
+			if (p->indent * INDENT + sz >= COLUMNS) {
+				if ( ! mbuf_newline(p))
+					return(0);
+				continue;
+			}
+			continue;
+		}
+
+		if (space && sz + p->pos >= COLUMNS) {
+			if ( ! mbuf_newline(p))
+				return(0);
+			if ( ! mbuf_indent(p))
+				return(0);
+		} else if (space) {
+			if ( ! mbuf_nputstring(p, " ", 1))
+				return(0);
+		}
+
+		if ( ! mbuf_nputstring(p, bufp, sz))
+			return(0);
+
+		if ( ! space && p->pos >= COLUMNS)
+			if ( ! mbuf_newline(p))
+				return(0);
+	}
+
+	return(1);
+}
+
+
+int
+md_line_xml(void *arg, char *buf)
+{
+	struct md_xml	*p;
+
+	p = (struct md_xml *)arg;
+	return(roff_engine(p->tree, buf));
+}
+
+
+int
+md_exit_xml(void *data, int flush)
+{
+	int		 c;
+	struct md_xml	*p;
+
+	p = (struct md_xml *)data;
+	c = roff_free(p->tree, flush);
+	free(p);
+
+	return(c);
+}
+
+
+void *
+md_init_xml(const struct md_args *args,
+		struct md_mbuf *mbuf, const struct md_rbuf *rbuf)
+{
+	struct roffcb	 cb;
+	struct md_xml	*p;
+
+	cb.roffhead = roffhead;
+	cb.rofftail = rofftail;
+	cb.roffin = roffin;
+	cb.roffout = roffout;
+	cb.roffblkin = roffblkin;
+	cb.roffblkout = roffblkout;
+	cb.roffspecial = roffspecial;
+	cb.roffmsg = roffmsg;
+	cb.roffdata = roffdata;
+
+	if (NULL == (p = calloc(1, sizeof(struct md_xml))))
+		err(1, "malloc");
+
+	p->args = args;
+	p->mbuf = mbuf;
+	p->rbuf = rbuf;
+
+	assert(mbuf);
+
+	if (NULL == (p->tree = roff_alloc(&cb, p))) {
+		free(p);
+		return(NULL);
+	}
+
+	return(p);
+}
+
+
+/* ARGSUSED */
+static int
+roffhead(void *arg)
+{
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	if ( ! mbuf_putstring(p, "<?xml version=\"1.0\" "
+				"encoding=\"UTF-8\"?>\n"))
+		return(0);
+	if ( ! mbuf_nputstring(p, "<block:mdoc>", 12))
+		return(0);
+
+	p->indent++;
+	p->last = MD_BLKIN;
+	return(mbuf_newline(p));
+}
+
+
+static int
+rofftail(void *arg)
+{
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	if (0 != p->pos && ! mbuf_newline(p))
+		return(0);
+
+	if ( ! mbuf_nputstring(p, "</block:mdoc>", 13))
+		return(0);
+
+	p->last = MD_BLKOUT;
+	return(mbuf_newline(p));
+}
+
+
+/* ARGSUSED */
+static int
+roffspecial(void *arg, int tok)
+{
+
+	/* FIXME */
+	return(1);
+}
+
+
+static int
+roffblkin(void *arg, int tok, int *argc, char **argv)
+{
+	struct md_xml	*p;
+	int		 i;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	if (0 != p->pos) {
+		if ( ! mbuf_newline(p))
+			return(0);
+		if ( ! mbuf_indent(p))
+			return(0);
+	} else if ( ! mbuf_indent(p))
+		return(0);
+
+	if ( ! mbuf_nputstring(p, "<", 1))
+		return(0);
+	if ( ! mbuf_nputstring(p, "block:", 6))
+		return(0);
+	if ( ! mbuf_putstring(p, toknames[tok]))
+		return(0);
+
+	for (i = 0; ROFF_ARGMAX != argc[i]; i++) {
+		if ( ! mbuf_nputstring(p, " ", 1))
+			return(0);
+		if ( ! mbuf_putstring(p, tokargnames[argc[i]]))
+			return(0);
+		if ( ! mbuf_nputstring(p, "=\"", 2))
+			return(0);
+		if ( ! mbuf_putstring(p, argv[i] ? argv[i] : "true"))
+			return(0);
+		if ( ! mbuf_nputstring(p, "\"", 1))
+			return(0);
+	}
+
+	if ( ! mbuf_nputstring(p, ">", 1))
+		return(0);
+
+	p->last = MD_BLKIN;
+	p->indent++;
+	return(mbuf_newline(p));
+}
+
+
+static int
+roffblkout(void *arg, int tok)
+{
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	p->indent--;
+
+	if (0 != p->pos) {
+		if ( ! mbuf_newline(p))
+			return(0);
+		if ( ! mbuf_indent(p))
+			return(0);
+	} else if ( ! mbuf_indent(p))
+		return(0);
+
+	if ( ! mbuf_nputstring(p, "</", 2))
+		return(0);
+	if ( ! mbuf_nputstring(p, "block:", 6))
+		return(0);
+	if ( ! mbuf_putstring(p, toknames[tok]))
+		return(0);
+	if ( ! mbuf_nputstring(p, ">", 1))
+		return(0);
+
+	p->last = MD_BLKOUT;
+	return(mbuf_newline(p));
+}
+
+
+static int
+roffin(void *arg, int tok, int *argc, char **argv)
+{
+	struct md_xml	*p;
+	int		 i;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	/* 
+	 * FIXME: put all of this in a buffer, then check the buffer
+	 * length versus the column width for nicer output.  This is a
+	 * bit hacky.
+	 */
+
+	if (p->pos + 11 > COLUMNS) 
+		if ( ! mbuf_newline(p))
+			return(0);
+
+	if (0 != p->pos) {
+		switch (p->last) {
+		case (MD_TEXT):
+			/* FALLTHROUGH */
+		case (MD_OUT):
+			if ( ! mbuf_nputstring(p, " ", 1))
+				return(0);
+			break;
+		default:
+			break;
+		}
+	} else if ( ! mbuf_indent(p))
+		return(0);
+
+	p->last = MD_IN;
+
+	if ( ! mbuf_nputstring(p, "<", 1))
+		return(0);
+	if ( ! mbuf_nputstring(p, "inline:", 7))
+		return(0);
+	if ( ! mbuf_putstring(p, toknames[tok]))
+		return(0);
+
+	for (i = 0; ROFF_ARGMAX != argc[i]; i++) {
+		if ( ! mbuf_nputstring(p, " ", 1))
+			return(0);
+		if ( ! mbuf_putstring(p, tokargnames[argc[i]]))
+			return(0);
+		if ( ! mbuf_nputstring(p, "=\"", 2))
+			return(0);
+		if ( ! mbuf_putstring(p, argv[i] ? argv[i] : "true"))
+			return(0);
+		if ( ! mbuf_nputstring(p, "\"", 1))
+			return(0);
+	}
+	return(mbuf_nputstring(p, ">", 1));
+}
+
+
+static int
+roffout(void *arg, int tok)
+{
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	if (0 == p->pos && ! mbuf_indent(p))
+		return(0);
+
+	p->last = MD_OUT;
+
+	if ( ! mbuf_nputstring(p, "</", 2))
+		return(0);
+	if ( ! mbuf_nputstring(p, "inline:", 7))
+		return(0);
+	if ( ! mbuf_putstring(p, toknames[tok]))
+		return(0);
+	return(mbuf_nputstring(p, ">", 1));
+}
+
+
+static void
+roffmsg(void *arg, enum roffmsg lvl, 
+		const char *buf, const char *pos, char *msg)
+{
+	char		*level;
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+
+	switch (lvl) {
+	case (ROFF_WARN):
+		if ( ! (MD_WARN_ALL & p->args->warnings))
+			return;
+		level = "warning";
+		break;
+	case (ROFF_ERROR):
+		level = "error";
+		break;
+	default:
+		abort();
+	}
+	
+	if (pos)
+		(void)fprintf(stderr, "%s:%zu: %s: %s (column %zu)\n", 
+				p->rbuf->name, p->rbuf->line, level, 
+				msg, pos - buf);
+	else
+		(void)fprintf(stderr, "%s: %s: %s\n", 
+				p->rbuf->name, level, msg);
+
+}
+
+
+static int
+roffdata(void *arg, int space, char *buf)
+{
+	struct md_xml	*p;
+
+	assert(arg);
+	p = (struct md_xml *)arg;
+	if ( ! mbuf_data(p, space, buf))
+		return(0);
+
+	p->last = MD_TEXT;
+	return(1);
+}