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/malloc/calloc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 src/malloc/calloc.c (limited to 'src/malloc/calloc.c') diff --git a/src/malloc/calloc.c b/src/malloc/calloc.c new file mode 100644 index 00000000..9d574562 --- /dev/null +++ b/src/malloc/calloc.c @@ -0,0 +1,23 @@ +#include +#include +#include + +void *calloc(size_t m, size_t n) +{ + void *p; + size_t *z; + if (n && m > (size_t)-1/n) { + errno = ENOMEM; + return 0; + } + n *= m; + p = malloc(n); + if (!p) return 0; + /* Only do this for non-mmapped chunks */ + if (((size_t *)p)[-1] & 7) { + /* Only write words that are not already zero */ + m = (n + sizeof *z - 1)/sizeof *z; + for (z=p; m; m--, z++) if (*z) *z=0; + } + return p; +} -- cgit v1.2.1