/sys$common/syshlp/helplib.hlb CC, Run-time functions, calloc  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Allocates an area of zeroed memory.  This function is
  AST-reentrant.

  Syntax:

       #include <stdlib.h>

       void *calloc(size_t number, size_t size);