1*e4b17023SJohn Marino /* xmemdup.c -- Duplicate a memory buffer, using xcalloc.
2*e4b17023SJohn Marino This trivial function is in the public domain.
3*e4b17023SJohn Marino Jeff Garzik, September 1999. */
4*e4b17023SJohn Marino
5*e4b17023SJohn Marino /*
6*e4b17023SJohn Marino
7*e4b17023SJohn Marino @deftypefn Replacement void* xmemdup (void *@var{input}, @
8*e4b17023SJohn Marino size_t @var{copy_size}, size_t @var{alloc_size})
9*e4b17023SJohn Marino
10*e4b17023SJohn Marino Duplicates a region of memory without fail. First, @var{alloc_size} bytes
11*e4b17023SJohn Marino are allocated, then @var{copy_size} bytes from @var{input} are copied into
12*e4b17023SJohn Marino it, and the new memory is returned. If fewer bytes are copied than were
13*e4b17023SJohn Marino allocated, the remaining memory is zeroed.
14*e4b17023SJohn Marino
15*e4b17023SJohn Marino @end deftypefn
16*e4b17023SJohn Marino
17*e4b17023SJohn Marino */
18*e4b17023SJohn Marino
19*e4b17023SJohn Marino #ifdef HAVE_CONFIG_H
20*e4b17023SJohn Marino #include "config.h"
21*e4b17023SJohn Marino #endif
22*e4b17023SJohn Marino #include "ansidecl.h"
23*e4b17023SJohn Marino #include "libiberty.h"
24*e4b17023SJohn Marino
25*e4b17023SJohn Marino #include <sys/types.h> /* For size_t. */
26*e4b17023SJohn Marino #ifdef HAVE_STRING_H
27*e4b17023SJohn Marino #include <string.h>
28*e4b17023SJohn Marino #else
29*e4b17023SJohn Marino # ifdef HAVE_STRINGS_H
30*e4b17023SJohn Marino # include <strings.h>
31*e4b17023SJohn Marino # endif
32*e4b17023SJohn Marino #endif
33*e4b17023SJohn Marino
34*e4b17023SJohn Marino PTR
xmemdup(const PTR input,size_t copy_size,size_t alloc_size)35*e4b17023SJohn Marino xmemdup (const PTR input, size_t copy_size, size_t alloc_size)
36*e4b17023SJohn Marino {
37*e4b17023SJohn Marino PTR output = xcalloc (1, alloc_size);
38*e4b17023SJohn Marino return (PTR) memcpy (output, input, copy_size);
39*e4b17023SJohn Marino }
40