1169695Skan/* xmemdup.c -- Duplicate a memory buffer, using xcalloc.
2169695Skan   This trivial function is in the public domain.
3169695Skan   Jeff Garzik, September 1999.  */
4169695Skan
5169695Skan/*
6169695Skan
7169695Skan@deftypefn Replacement void* xmemdup (void *@var{input}, size_t @var{copy_size}, size_t @var{alloc_size})
8169695Skan
9169695SkanDuplicates a region of memory without fail.  First, @var{alloc_size} bytes
10169695Skanare allocated, then @var{copy_size} bytes from @var{input} are copied into
11169695Skanit, and the new memory is returned.  If fewer bytes are copied than were
12169695Skanallocated, the remaining memory is zeroed.
13169695Skan
14169695Skan@end deftypefn
15169695Skan
16169695Skan*/
17169695Skan
18169695Skan#ifdef HAVE_CONFIG_H
19169695Skan#include "config.h"
20169695Skan#endif
21169695Skan#include "ansidecl.h"
22169695Skan#include "libiberty.h"
23169695Skan
24169695Skan#include <sys/types.h> /* For size_t. */
25169695Skan#ifdef HAVE_STRING_H
26169695Skan#include <string.h>
27169695Skan#else
28169695Skan# ifdef HAVE_STRINGS_H
29169695Skan#  include <strings.h>
30169695Skan# endif
31169695Skan#endif
32169695Skan
33169695SkanPTR
34169695Skanxmemdup (const PTR input, size_t copy_size, size_t alloc_size)
35169695Skan{
36169695Skan  PTR output = xcalloc (1, alloc_size);
37169695Skan  return (PTR) memcpy (output, input, copy_size);
38169695Skan}
39