1 /* calloc -- allocate memory which has been initialized to zero.
2    This function is in the public domain. */
3 
4 /*
5 
6 @deftypefn Supplemental void* calloc (size_t @var{nelem}, size_t @var{elsize})
7 
8 Uses @code{malloc} to allocate storage for @var{nelem} objects of
9 @var{elsize} bytes each, then zeros the memory.
10 
11 @end deftypefn
12 
13 */
14 
15 #include "ansidecl.h"
16 #include <stddef.h>
17 
18 /* For systems with larger pointers than ints, this must be declared.  */
19 PTR malloc (size_t);
20 void bzero (PTR, size_t);
21 
22 PTR
calloc(size_t nelem,size_t elsize)23 calloc (size_t nelem, size_t elsize)
24 {
25   register PTR ptr;
26 
27   if (nelem == 0 || elsize == 0)
28     nelem = elsize = 1;
29 
30   ptr = malloc (nelem * elsize);
31   if (ptr) bzero (ptr, nelem * elsize);
32 
33   return ptr;
34 }
35