From 885f5974cdf65b59415837ae97f5a14ef1350670 Mon Sep 17 00:00:00 2001 From: Kacper Date: Tue, 9 Dec 2025 19:20:15 +0100 Subject: feat: add gzip and new headers --- lib/libc/string/memcpy.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'lib/libc/string/memcpy.c') diff --git a/lib/libc/string/memcpy.c b/lib/libc/string/memcpy.c index ecdbd602..05586b55 100644 --- a/lib/libc/string/memcpy.c +++ b/lib/libc/string/memcpy.c @@ -1,3 +1,4 @@ +#include #include #include @@ -14,3 +15,41 @@ void *memcpy(void *restrict s1, const void *restrict s2, size_t n) return s1; } + +errno_t memcpy_s(void *restrict dest, rsize_t destsz, const void *restrict src, + rsize_t count) +{ + if (dest == NULL || src == NULL) { + if (dest != NULL && destsz > 0) { + unsigned char *d = dest; + for (rsize_t i = 0; i < destsz; i++) { + d[i] = 0; + } + } + + return EINVAL; + } + + const unsigned char *s = src; + unsigned char *d = dest; + + if ((d > s && d < s + count) || (s > d && s < d + count)) { + for (rsize_t i = 0; i < destsz; i++) { + d[i] = 0; + } + return EINVAL; + } + + if (count > destsz) { + for (rsize_t i = 0; i < destsz; i++) { + d[i] = 0; + } + return ERANGE; + } + + for (rsize_t i = 0; i < count; i++) { + d[i] = s[i]; + } + + return 0; +} -- cgit v1.2.3