xmemdup.c revision 89858 
1/* xmemdup.c -- Duplicate a memory buffer, using xcalloc.
2   This trivial function is in the public domain.
3   Jeff Garzik, September 1999.  */
4
5/*
6
7@deftypefn Replacement void* xmemdup (void *@var{input}, size_t @var{copy_size}, size_t @var{alloc_size})
8
9Duplicates a region of memory without fail.  First, @var{alloc_size} bytes
10are allocated, then @var{copy_size} bytes from @var{input} are copied into
11it, and the new memory is returned.  If fewer bytes are copied than were
12allocated, the remaining memory is zeroed.
13
14@end deftypefn
15
16*/
17
18#ifdef HAVE_CONFIG_H
19#include "config.h"
20#endif
21#include "ansidecl.h"
22#include "libiberty.h"
23
24#include <sys/types.h> /* For size_t. */
25#ifdef HAVE_STRING_H
26#include <string.h>
27#endif
28
29PTR
30xmemdup (input, copy_size, alloc_size)
31  const PTR input;
32  size_t copy_size;
33  size_t alloc_size;
34{
35  PTR output = xcalloc (1, alloc_size);
36  memcpy (output, input, copy_size);
37  return output;
38}
39