Escape-sequence validation in place (for nodes).

1 files changed, 47 insertions, 3 deletions

diff --git a/strings.c b/strings.c
index e7538cf5..c3b0403d 100644
--- a/strings.c
+++ b/strings.c
@@ -1,4 +1,4 @@
-/* $Id: strings.c,v 1.15 2009/02/23 15:34:53 kristaps Exp $ */
+/* $Id: strings.c,v 1.16 2009/02/24 11:43:13 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -35,6 +35,50 @@
 extern	char		*strptime(const char *, const char *, struct tm *);
 #endif
 
+
+size_t
+mdoc_isescape(const char *p)
+{
+	size_t		 c;
+	
+	if ('\\' != *p++)
+		return(0);
+
+	switch (*p) {
+	case ('\\'):
+		/* FALLTHROUGH */
+	case ('\''):
+		/* FALLTHROUGH */
+	case ('`'):
+		/* FALLTHROUGH */
+	case ('-'):
+		/* FALLTHROUGH */
+	case (' '):
+		/* FALLTHROUGH */
+	case ('.'):
+		/* FALLTHROUGH */
+	case ('e'):
+		return(2);
+	case ('('):
+		if (0 == *++p)
+			return(0);
+		if (0 == *++p)
+			return(0);
+		return(4);
+	case ('['):
+		break;
+	default:
+		return(0);
+	}
+
+	for (c = 3, p++; *p && ']' != *p; p++, c++)
+		if (isspace(*p))
+			break;
+
+	return(*p == ']' ? c : 0);
+}
+
+
 int
 mdoc_iscdelim(char p)
 {
@@ -132,9 +176,9 @@ mdoc_atotime(const char *p)
 
 	(void)memset(&tm, 0, sizeof(struct tm));
 
-	if (xstrcmp(p, "$Mdocdate: February 23 2009 $"))
+	if (xstrcmp(p, "$Mdocdate: February 24 2009 $"))
 		return(time(NULL));
-	if ((pp = strptime(p, "$Mdocdate: February 23 2009 $", &tm)) && 0 == *pp)
+	if ((pp = strptime(p, "$Mdocdate: February 24 2009 $", &tm)) && 0 == *pp)
 		return(mktime(&tm));
 	/* XXX - this matches "June 1999", which is wrong. */
 	if ((pp = strptime(p, "%b %d %Y", &tm)) && 0 == *pp)