Add a WS_Dup() function

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2166 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache.h

@@ -585,6 +585,7 @@ void WS_ReleaseP(struct ws *ws, char *ptr);
 void WS_Assert(const struct ws *ws);
 void WS_Reset(struct ws *ws);
 char *WS_Alloc(struct ws *ws, unsigned bytes);
+char *WS_Dup(struct ws *ws, const char *);
 
 /* rfc2616.c */
 int RFC2616_cache_policy(const struct sess *sp, const struct http *hp);

bin/varnishd/cache_ws.c

@@ -96,6 +96,19 @@ WS_Alloc(struct ws *ws, unsigned bytes)
 	return (r);
 }
 
+char *
+WS_Dup(struct ws *ws, const char *s)
+{
+	unsigned l;
+	char *p;
+
+	l = strlen(s) + 1;
+	p = WS_Alloc(ws, l);
+	if (p != NULL)
+		memcpy(p, s, l);
+	return (p);
+}
+
 unsigned
 WS_Reserve(struct ws *ws, unsigned bytes)
 {