From 3eacf85ec9dd638c2023c89c2a6cdf61107fc617 Mon Sep 17 00:00:00 2001
From: Kent Sutherland <git@ksuther.com>
Date: Fri, 14 Jun 2019 15:21:59 -0500
Subject: [PATCH] Fix timeout found by fuzzer (oss-fuzz issue 14881) strspn is
 really slow compared to doing direct comparisons

---
 src/libical/icalparser.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/libical/icalparser.c b/src/libical/icalparser.c
index fa92495..0530a4b 100644
--- a/src/libical/icalparser.c
+++ b/src/libical/icalparser.c
@@ -221,21 +221,29 @@ static void parser_decode_param_value(char *value)
     char *in, *out;
 
     for (in = out = value; *in; in++, out++) {
-        if (*in == '^' && strspn(in+1, "n^'")) {
-            switch (*++in) {
-            case 'n':
+        int found_escaped_char = 0;
+	
+	if(*in == '^'){
+	    switch (*(in + 1)) {
+	    case 'n':
                 *out = '\n';
+		found_escaped_char = 1;
                 break;
-
             case '^':
                 *out = '^';
+		found_escaped_char = 1;
                 break;
 
             case '\'':
                 *out = '"';
+		found_escaped_char = 1;
                 break;
             }
-        } else {
+        }
+	 
+	if(found_escaped_char) {
+	++in;
+	} else {
             *out = *in;
         }
     }
-- 
2.19.1