1 files changed, 24 insertions, 0 deletions
diff --git a/usr/klibc/strcasecmp.c b/usr/klibc/strcasecmp.c
new file mode 100644
index 0000000..ee1f28b
--- /dev/null
+++ b/usr/klibc/strcasecmp.c
@@ -0,0 +1,24 @@
+/*
+ * strcasecmp.c
+ */
+
+#include <string.h>
+#include <ctype.h>
+
+int strcasecmp(const char *s1, const char *s2)
+{
+	const unsigned char *c1 = (const unsigned char *)s1;
+	const unsigned char *c2 = (const unsigned char *)s2;
+	unsigned char ch;
+	int d = 0;
+
+	while (1) {
+		/* toupper() expects an unsigned char (implicitly cast to int)
+		   as input, and returns an int, which is exactly what we want. */
+		d = toupper(ch = *c1++) - toupper(*c2++);
+		if (d || !ch)
+			break;
+	}
+
+	return d;
+}