meta: move photon/libc to root

libc/string/memmove.c

@@ -0,0 +1,27 @@
+#include <string.h>
+
+#define ALIGNED(p) (!((long)p & (sizeof(long) - 1)))
+#define QUADBLOCKSIZE (sizeof(long) << 2)
+#define BLOCKSIZE (sizeof(long))
+
+static void *memcpy_r(void *dest, const void *src, size_t sz)
+{
+    unsigned char *d = dest;
+    const unsigned char *s = src;
+
+    for (size_t i = 0; i < sz; i++) {
+        size_t b = sz - i - 1;
+        d[b] = s[b];
+    }
+
+    return dest;
+}
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+    if (dest < src) {
+        return memcpy(dest, src, n);
+    } else {
+        return memcpy_r(dest, src, n);
+    }
+}