revert using strcasestr and use a more optimized portable version

[dmenu.git] / dmenu.c

diff --git a/dmenu.c b/dmenu.c
index 98507d9..88d2f12 100644 (file)
--- a/dmenu.c
+++ b/dmenu.c
@@ -103,13 +103,21 @@ cleanup(void)
 }
 
 static char *
-cistrstr(const char *s, const char *sub)
+cistrstr(const char *h, const char *n)
+
 {
-       size_t len;
+       size_t i;
 
-       for (len = strlen(sub); *s; s++)
-               if (!strncasecmp(s, sub, len))
-                       return (char *)s;
+       if (!n[0])
+               return (char *)h;
+
+       for (; *h; ++h) {
+               for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
+                           tolower((unsigned char)h[i]); ++i)
+                       ;
+               if (n[i] == '\0')
+                       return (char *)h;
+       }
        return NULL;
 }