From 8a9208612eec8ddae4c418485d848ecfa0613699 Mon Sep 17 00:00:00 2001 From: Anton Kling Date: Mon, 30 Oct 2023 22:12:14 +0100 Subject: Meta: Move kernel and userland to their own folders. This is to allow both the kernel and the userland to share certain header files and to make the folder structure a bit more clear. --- kernel/libc/string/memcpy.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 kernel/libc/string/memcpy.c (limited to 'kernel/libc/string/memcpy.c') diff --git a/kernel/libc/string/memcpy.c b/kernel/libc/string/memcpy.c new file mode 100644 index 0000000..5c04407 --- /dev/null +++ b/kernel/libc/string/memcpy.c @@ -0,0 +1,20 @@ +#include "../include/string.h" + +void * +memcpy(void *dest, const void *src, uint32_t n) { + unsigned char *d = dest; + const unsigned char *s = src; + + for (; n >= 8; n -= 8, d += 8, s += 8) + *(uint64_t *)d = *(uint64_t *)s; + + for (; n >= 4; n -= 4, d += 4, s += 4) + *(uint32_t *)d = *(uint32_t *)s; + + for (; n >= 2; n -= 2, d += 2, s += 2) + *(uint16_t *)d = *(uint16_t *)s; + + for (; n; n--) + *d++ = *s++; + return dest; +} -- cgit v1.2.3