From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/string/memset.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/string/memset.c (limited to 'src/string/memset.c') diff --git a/src/string/memset.c b/src/string/memset.c new file mode 100644 index 00000000..20e47c45 --- /dev/null +++ b/src/string/memset.c @@ -0,0 +1,21 @@ +#include +#include +#include +#include + +#define SS (sizeof(size_t)) +#define ALIGN (sizeof(size_t)-1) +#define ONES ((size_t)-1/UCHAR_MAX) + +void *memset(void *dest, int c, size_t n) +{ + unsigned char *s = dest; + c = (unsigned char)c; + for (; ((uintptr_t)s & ALIGN) && n; n--) *s++ = c; + if (n) { + size_t *w, k = ONES * c; + for (w = (void *)s; n>=SS; n-=SS, w++) *w = k; + for (s = (void *)w; n; n--, s++) *s = c; + } + return dest; +} -- cgit v1.2.3-70-g09d2