ref: cd22f5ca84e68df5c0c7f897e52c065ae4a7feeb
dir: /sys/src/ape/lib/ap/gen/calloc.c/
#include <stdlib.h>
#include <string.h>
void *
calloc(size_t nmemb, size_t size)
{
void *mp;
nmemb = nmemb*size;
if(mp = malloc(nmemb))
memset(mp, 0, nmemb);
return(mp);
}