X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=libcitadel%2Flib%2Fstringbuf.c;h=8718ec065a68ac6e38913def4fc30a84226c75da;hb=6d77e7946f7f1143c8ce75f9cbf2f6ddbab5e57a;hp=4a0953f9a6440c544367eacf803cfd7b56299409;hpb=e395ebd37ccd1ff4af1f6878465852bcffb24e46;p=citadel.git

diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 4a0953f9a..8718ec065 100644
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -3176,14 +3176,16 @@ void StrBuf_RFC822_to_Utf8(StrBuf *Target, const StrBuf *DecodeMe, const StrBuf*
  */
 static inline int Ctdl_GetUtf8SequenceLength(const char *CharS, const char *CharE)
 {
-	int n = 1;
-        char test = (1<<7);
+	int n = 0;
+        unsigned char test = (1<<7);
 
 	if ((*CharS & 0xC0) == 0) 
 		return 1;
 
-	while ((n < 8) && ((test & *CharS) != 0)) {
-		test = test << 1;
+	while ((n < 8) && 
+	       ((test & ((unsigned char)*CharS)) != 0)) 
+	{
+		test = test >> 1;
 		n ++;
 	}
 	if ((n > 6) || ((CharE - CharS) < n))