minix/lib/libc/ansi/calloc.c

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2005-04-21 16:53:53 +02:00
/* $Header$ */
#include <stdlib.h>
/* replace undef by define */
#define ALIGN_EIGHT_BYTES /* Use 8-byte alignment. */
#ifdef ALIGN_EIGHT_BYTES
#define ALIGN_SIZE 8
#else
#define ALIGN_SIZE sizeof(size_t)
#endif
#define ALIGN(x) (((x) + (ALIGN_SIZE - 1)) & ~(ALIGN_SIZE - 1))
2005-04-21 16:53:53 +02:00
void *
calloc(size_t nelem, size_t elsize)
{
register char *p;
register size_t *q;
size_t size = ALIGN(nelem * elsize);
p = malloc(size);
if (p == NULL) return NULL;
q = (size_t *) (p + size);
while ((char *) q > p) *--q = 0;
return p;
}