Properly cast arguments of ctype is*()/to*() functions to unsigned char.

svn path=/trunk/; revision=4324

1 files changed, 9 insertions, 9 deletions

diff --git a/strcasecmp.c b/strcasecmp.c
index c1f3bbd8..76ab9be3 100644
--- a/strcasecmp.c
+++ b/strcasecmp.c
@@ -6,18 +6,18 @@
  */
 #include <ctype.h>
 
-strcasecmp(char *s1, char *s2)
+int strcasecmp(char *s1, char *s2)
 {
-    while (toupper(*s1) == toupper(*s2++))
+    while (toupper((unsigned char)*s1) == toupper((unsigned char)*s2++))
 	if (*s1++ == '\0')
-	    return(0);
-    return(toupper(*s1) - toupper(*--s2));
+	    return 0;
+    return(toupper((unsigned char)*s1) - toupper((unsigned char)*--s2));
 }
 
-strncasecmp(char *s1, char *s2, register int n)
+int strncasecmp(char *s1, char *s2, register int n)
 {
-    while (--n >= 0 && toupper(*s1) == toupper(*s2++))
-	if (toupper(*s1++) == '\0')
-	    return(0);
-    return(n < 0 ? 0 : toupper(*s1) - toupper(*--s2));
+    while (--n >= 0 && toupper((unsigned char)*s1) == toupper((unsigned char)*s2++))
+	if (*s1++ == '\0')
+	    return 0;
+    return(n < 0 ? 0 : toupper((unsigned char)*s1) - toupper((unsigned char)*--s2));
 }