1*1debfc3dSmrg /* xmemdup.c -- Duplicate a memory buffer, using xmalloc.
2*1debfc3dSmrg This trivial function is in the public domain.
3*1debfc3dSmrg Jeff Garzik, September 1999. */
4*1debfc3dSmrg
5*1debfc3dSmrg /*
6*1debfc3dSmrg
7*1debfc3dSmrg @deftypefn Replacement void* xmemdup (void *@var{input}, @
8*1debfc3dSmrg size_t @var{copy_size}, size_t @var{alloc_size})
9*1debfc3dSmrg
10*1debfc3dSmrg Duplicates a region of memory without fail. First, @var{alloc_size} bytes
11*1debfc3dSmrg are allocated, then @var{copy_size} bytes from @var{input} are copied into
12*1debfc3dSmrg it, and the new memory is returned. If fewer bytes are copied than were
13*1debfc3dSmrg allocated, the remaining memory is zeroed.
14*1debfc3dSmrg
15*1debfc3dSmrg @end deftypefn
16*1debfc3dSmrg
17*1debfc3dSmrg */
18*1debfc3dSmrg
19*1debfc3dSmrg #ifdef HAVE_CONFIG_H
20*1debfc3dSmrg #include "config.h"
21*1debfc3dSmrg #endif
22*1debfc3dSmrg #include "ansidecl.h"
23*1debfc3dSmrg #include "libiberty.h"
24*1debfc3dSmrg
25*1debfc3dSmrg #include <sys/types.h> /* For size_t. */
26*1debfc3dSmrg #ifdef HAVE_STRING_H
27*1debfc3dSmrg #include <string.h>
28*1debfc3dSmrg #else
29*1debfc3dSmrg # ifdef HAVE_STRINGS_H
30*1debfc3dSmrg # include <strings.h>
31*1debfc3dSmrg # endif
32*1debfc3dSmrg #endif
33*1debfc3dSmrg
34*1debfc3dSmrg PTR
xmemdup(const PTR input,size_t copy_size,size_t alloc_size)35*1debfc3dSmrg xmemdup (const PTR input, size_t copy_size, size_t alloc_size)
36*1debfc3dSmrg {
37*1debfc3dSmrg PTR output = xmalloc (alloc_size);
38*1debfc3dSmrg if (alloc_size > copy_size)
39*1debfc3dSmrg memset ((char *) output + copy_size, 0, alloc_size - copy_size);
40*1debfc3dSmrg return (PTR) memcpy (output, input, copy_size);
41*1debfc3dSmrg }
42