X-Git-Url: https://git.xinqibao.xyz/dmenu.git/blobdiff_plain/cd2133a5f66b42f992a9a1b92bbbce11dc26b941..3e39c526d28582b0b5606d3e3bb36ee3d271e616:/dmenu.c

diff --git a/dmenu.c b/dmenu.c
index 98507d9..88d2f12 100644
--- 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;
 }