From 9e21548672490d99d4a59ab449c80b3721689818 Mon Sep 17 00:00:00 2001
From: Kristaps Dzonsons <kristaps@bsd.lv>
Date: Sat, 4 Jul 2009 09:01:55 +0000
Subject: Moved escape validation into libmandoc.h/mandoc.c (common between
 libman/libmdoc1). libman supports MAN_IGN_ESCAPE (like MDOC_IGN_ESCAPE). All
 popular escapes now handled consistently.

---
 mandoc.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 mandoc.c

(limited to 'mandoc.c')

diff --git a/mandoc.c b/mandoc.c
new file mode 100644
index 00000000..9ca3c570
--- /dev/null
+++ b/mandoc.c
@@ -0,0 +1,101 @@
+/*	$Id: mandoc.c,v 1.1 2009/07/04 09:01:55 kristaps Exp $ */
+/*
+ * Copyright (c) 2008, 2009 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 <assert.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "libmandoc.h"
+
+int
+mandoc_special(const char *p)
+{
+	int		 c;
+	
+	if ('\\' != *p++)
+		return(0);
+
+	switch (*p) {
+	case ('\\'):
+		/* FALLTHROUGH */
+	case ('\''):
+		/* FALLTHROUGH */
+	case ('`'):
+		/* FALLTHROUGH */
+	case ('q'):
+		/* FALLTHROUGH */
+	case ('-'):
+		/* FALLTHROUGH */
+	case ('~'):
+		/* FALLTHROUGH */
+	case ('^'):
+		/* FALLTHROUGH */
+	case ('%'):
+		/* FALLTHROUGH */
+	case ('0'):
+		/* FALLTHROUGH */
+	case (' '):
+		/* FALLTHROUGH */
+	case ('|'):
+		/* FALLTHROUGH */
+	case ('&'):
+		/* FALLTHROUGH */
+	case ('.'):
+		/* FALLTHROUGH */
+	case (':'):
+		/* FALLTHROUGH */
+	case ('e'):
+		return(2);
+	case ('f'):
+		if (0 == *++p || ! isgraph((u_char)*p))
+			return(0);
+		return(3);
+	case ('*'):
+		if (0 == *++p || ! isgraph((u_char)*p))
+			return(0);
+		switch (*p) {
+		case ('('):
+			if (0 == *++p || ! isgraph((u_char)*p))
+				return(0);
+			return(4);
+		case ('['):
+			for (c = 3, p++; *p && ']' != *p; p++, c++)
+				if ( ! isgraph((u_char)*p))
+					break;
+			return(*p == ']' ? c : 0);
+		default:
+			break;
+		}
+		return(3);
+	case ('('):
+		if (0 == *++p || ! isgraph((u_char)*p))
+			return(0);
+		if (0 == *++p || ! isgraph((u_char)*p))
+			return(0);
+		return(4);
+	case ('['):
+		break;
+	default:
+		return(0);
+	}
+
+	for (c = 3, p++; *p && ']' != *p; p++, c++)
+		if ( ! isgraph((u_char)*p))
+			break;
+
+	return(*p == ']' ? c : 0);
+}
+
-- 
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