From 162d024a53e1e31e00ff0b6f47dd4590edebc551 Mon Sep 17 00:00:00 2001 From: Marvin Borner Date: Sun, 9 Aug 2020 16:51:01 +0200 Subject: Heavy restructuring of libc, kernel and apps --- lib/mem.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 lib/mem.c (limited to 'lib/mem.c') diff --git a/lib/mem.c b/lib/mem.c new file mode 100644 index 0000000..00b9735 --- /dev/null +++ b/lib/mem.c @@ -0,0 +1,33 @@ +// MIT License, Copyright (c) 2020 Marvin Borner + +#include + +void *memcpy(void *dst, const void *src, u32 n) +{ + const char *sp = (const char *)src; + char *dp = (char *)dst; + for (; n != 0; n--) + *dp++ = *sp++; + return dst; +} + +void *memset(void *dst, char val, u32 n) +{ + char *temp = (char *)dst; + for (; n != 0; n--) + *temp++ = val; + return dst; +} + +int memcmp(const void *s1, const void *s2, u32 n) +{ + const u8 *a = (const u8 *)s1; + const u8 *b = (const u8 *)s2; + for (u32 i = 0; i < n; i++) { + if (a[i] < b[i]) + return -1; + else if (b[i] < a[i]) + return 1; + } + return 0; +} -- cgit v1.2.3