From a9f55f411d42fc5f60c099d7d9bc432f0be3852d Mon Sep 17 00:00:00 2001
From: Christoph Junghans <ottxor@gentoo.org>
Date: Thu, 17 May 2012 00:43:06 -0400
Subject: rpmoffset: provide a local memmem for non-glibc systems

URL: https://bugs.gentoo.org/397835
Reported-by: Christoph Junghans <ottxor@gentoo.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 rpmoffset.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'rpmoffset.c')

diff --git a/rpmoffset.c b/rpmoffset.c
index 0a3c488..628af93 100644
--- a/rpmoffset.c
+++ b/rpmoffset.c
@@ -19,6 +19,26 @@
 # define BUFSIZ 8192
 #endif
 
+#if !defined(__GLIBC__)
+static void *rp_memmem(const void *buf, size_t buflen, const void *pattern, size_t len)
+{
+	char *bf = (char *)buf, *pt = (char *)pattern, *p = bf;
+
+	while (len <= (buflen - (p - bf))) {
+		if (NULL != (p = memchr(p, (int)(*pt), buflen - (p - bf)))) {
+			if (0 == memcmp(p, pattern, len))
+				return p;
+			else
+				++p;
+		}
+		else
+			break;
+	}
+	return NULL;
+}
+#define memmem(a,b,c,d) rp_memmem(a,b,c,d)
+#endif
+
 typedef struct {
 	const char *type;
 	const unsigned char *magic;
-- 
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