Add build system scaffolding and libc headers

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libc/string/memccpy.c b/lib/libc/string/memccpy.c
new file mode 100644
index 00000000..29828182
--- /dev/null
+++ b/lib/libc/string/memccpy.c
@@ -0,0 +1,13 @@
+#include <stddef.h>
+
+void *memccpy(void *restrict s1, const void *restrict s2, int c, size_t n)
+{
+	const unsigned char *p2 = s2;
+	unsigned char *p1 = s1;
+	while (n--) {
+		if (*p2 == (unsigned char)c)
+			return p1 + 1;
+		*p1++ = *p2++;
+	}
+	return NULL;
+}