calloc—allocate space for arrays #include <stdlib.h>
void *calloc(size_t n, size_t s);
void *calloc_r(void *reent, size_t <n>, <size_t> s);
Description
Use calloc to request a block of memory sufficient to hold an
array of n elements, each of which has size s.
The memory allocated by calloc comes out of the same memory pool
used by malloc, but the memory block is initialized to all zero
bytes. (To avoid the overhead of initializing the space, use
malloc instead.)
The alternate function _calloc_r is reentrant.
The extra argument reent is a pointer to a reentrancy structure.
Returns
If successful, a pointer to the newly allocated space.
If unsuccessful, NULL.
Portability
calloc is ANSI.
Supporting OS subroutines required: close, fstat, isatty,
lseek, read, sbrk, write.