| 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 | #ifdef ANSI_PROTOTYPES |
| 17 | #include <stddef.h> |
| 18 | #else |
| 19 | #define size_t unsigned long |
| 20 | #endif |
| 21 | |
| 22 | /* For systems with larger pointers than ints, this must be declared. */ |
| 23 | PTR malloc PARAMS ((size_t)); |
| 24 | void bzero PARAMS ((PTR, size_t)); |
| 25 | |
| 26 | PTR |
| 27 | calloc (nelem, elsize) |
| 28 | size_t nelem, elsize; |
| 29 | { |
| 30 | register PTR ptr; |
| 31 | |
| 32 | if (nelem == 0 || elsize == 0) |
| 33 | nelem = elsize = 1; |
| 34 | |
| 35 | ptr = malloc (nelem * elsize); |
| 36 | if (ptr) bzero (ptr, nelem * elsize); |
| 37 | |
| 38 | return ptr; |
| 39 | } |