From ef34af24dc457f7a3ccfd8047e3d21e07f3f55e4 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@osdl.org>
Date: Sun, 18 Sep 2005 18:30:50 -0700
Subject: [PATCH] strcasestr compatibility replacement

Some C libraries lack strcasestr(); add a stupid replacement
to help folks with such.

[jc: original Linus posting, updated with his "also need <ctype.h>",
 updated further with a fix from Joachim B Haga <cjhaga@fys.uio.no>"]

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 compat/strcasestr.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 compat/strcasestr.c

(limited to 'compat/strcasestr.c')

diff --git a/compat/strcasestr.c b/compat/strcasestr.c
new file mode 100644
index 000000000..b96414d36
--- /dev/null
+++ b/compat/strcasestr.c
@@ -0,0 +1,23 @@
+#include <string.h>
+#include <ctype.h>
+
+char *gitstrcasestr(const char *haystack, const char *needle)
+{
+	int nlen = strlen(needle);
+	int hlen = strlen(haystack) - nlen + 1;
+	int i;
+
+	for (i = 0; i < hlen; i++) {
+		int j;
+		for (j = 0; j < nlen; j++) {
+			unsigned char c1 = haystack[i+j];
+			unsigned char c2 = needle[j];
+			if (toupper(c1) != toupper(c2))
+				goto next;
+		}
+		return (char *) haystack + i;
+	next:
+		;
+	}
+	return NULL;
+}
-- 
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