lib/libc/minix/minix-calloc.c

   1 /* $Header$ */
   2 #include        <stdlib.h>
   3
   4 /* replace undef by define */
   5 #define  ALIGN_EIGHT_BYTES /* Use 8-byte alignment. */
   6
   7 #ifdef  ALIGN_EIGHT_BYTES
   8 #define ALIGN_SIZE 8
   9 #else
  10 #define ALIGN_SIZE sizeof(size_t)
  11 #endif
  12
  13 #define ALIGN(x)        (((x) + (ALIGN_SIZE - 1)) & ~(ALIGN_SIZE - 1))
  14
  15 void *
  16 calloc(size_t nelem, size_t elsize)
  17 {
  18         register char *p;
  19         register size_t *q;
  20         size_t size = ALIGN(nelem * elsize);
  21
  22         p = malloc(size);
  23         if (p == NULL) return NULL;
  24         q = (size_t *) (p + size);
  25         while ((char *) q > p) *--q = 0;
  26         return p;
  27 }
  28