Add build system scaffolding and libc headers

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/libc/string/memmem.c b/lib/libc/string/memmem.c
new file mode 100644
index 00000000..7a450cf7
--- /dev/null
+++ b/lib/libc/string/memmem.c
@@ -0,0 +1,15 @@
+#include <string.h>
+
+void *memmem(const void *haystack, size_t haystacklen, const void *needle,
+	     size_t needlelen)
+{
+	const unsigned char *p1 = haystack;
+	const unsigned char *p2 = needle;
+	while (haystacklen >= needlelen) {
+		if (!memcmp(p1, p2, needlelen))
+			return (void *)p1;
+		p1++;
+		haystacklen--;
+	}
+	return NULL;
+}