make IF dialplan function handle quoted strings properly (bug #4322, with API mods)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5750 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_logic.c

@@ -55,6 +55,12 @@ static char *builtin_function_if(struct ast_channel *chan, char *cmd, char *data
 		} 
 
 		if (expr && iftrue) {
+			expr = ast_strip_quoted(expr, "\"", "\"");
+			iftrue = ast_strip_quoted(iftrue, "\"", "\"");
+
+			if (iffalse) {
+				iffalse = ast_strip_quoted(iffalse, "\"", "\"");
+			}
 			ret = ast_true(expr) ? iftrue : iffalse;
 			if (ret) {
 				ast_copy_string(buf, ret, len);

include/asterisk/utils.h

@@ -130,7 +130,43 @@ struct ast_hostent {
 	char buf[1024];
 };
 
-extern char *ast_strip(char *buf);
+/*!
+  \brief Strip leading/trailing whitespace from a string.
+  \param s The string to be stripped (will be modified).
+  \return The stripped string.
+
+  This functions strips all leading and trailing whitespace
+  characters from the input string, and returns a pointer to
+  the resulting string. The string is modified in place.
+*/
+char *ast_strip(char *s);
+
+/*!
+  \brief Strip leading/trailing whitespace and quotes from a string.
+  \param s The string to be stripped (will be modified).
+  \param beg_quotes The list of possible beginning quote characters.
+  \param end_quotes The list of matching ending quote characters.
+  \return The stripped string.
+
+  This functions strips all leading and trailing whitespace
+  characters from the input string, and returns a pointer to
+  the resulting string. The string is modified in place.
+
+  It can also remove beginning and ending quote (or quote-like)
+  characters, in matching pairs. If the first character of the
+  string matches any character in beg_quotes, and the last
+  character of the string is the matching character in
+  end_quotes, then they are removed from the string.
+
+  Examples:
+  \code
+  ast_strip_quoted(buf, "\"", "\"");
+  ast_strip_quoted(buf, "'", "'");
+  ast_strip_quoted(buf, "[{(", "]})");
+  \endcode
+ */
+char *ast_strip_quoted(char *s, const char *beg_quotes, const char *end_quotes);
+
 extern struct hostent *ast_gethostbyname(const char *host, struct ast_hostent *hp);
 /* ast_md5_hash: Produces MD5 hash based on input string */
 extern void ast_md5_hash(char *output, char *input);

utils.c

@@ -33,17 +33,33 @@
 static char base64[64];
 static char b2a[256];
 
-char *ast_strip(char *buf)
+char *ast_strip(char *s)
 {
-	char *start;
-	/* Strip off trailing whitespace, returns, etc */
-	while (!ast_strlen_zero(buf) && (buf[strlen(buf)-1]<33))
-		buf[strlen(buf)-1] = '\0';
-	start = buf;
-	/* Strip off leading whitespace, returns, etc */
-	while (*start && (*start < 33))
-		*start++ = '\0';
-	return start;
+	char *e;
+
+	while (*s && (*s < 33)) s++;
+	e = s + strlen(s) - 1;
+	while ((e > s) && (*e < 33)) e--;
+	*++e = '\0';
+
+	return s;
+} 
+
+char *ast_strip_quoted(char *s, const char *beg_quotes, const char *end_quotes)
+{
+	char *e;
+	char *q;
+
+	s = ast_strip(s);
+	if ((q = strchr(beg_quotes, *s))) {
+		e = s + strlen(s) - 1;
+		if (*e == *(end_quotes + (q - beg_quotes))) {
+			s++;
+			*e = '\0';
+		}
+	}
+
+	return s;
 }
 
 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined( __NetBSD__ ) || defined(__APPLE__)