blob: f2ed41f9b4d9c659dbec0eb7c84df9f77ffe6d65 [file] [log] [blame]
/* xmemdup.c -- Duplicate a memory buffer, using xmalloc.
This trivial function is in the public domain.
Jeff Garzik, September 1999. */
@deftypefn Replacement void* xmemdup (void *@var{input}, @
size_t @var{copy_size}, size_t @var{alloc_size})
Duplicates a region of memory without fail. First, @var{alloc_size} bytes
are allocated, then @var{copy_size} bytes from @var{input} are copied into
it, and the new memory is returned. If fewer bytes are copied than were
allocated, the remaining memory is zeroed.
@end deftypefn
#include "config.h"
#include "ansidecl.h"
#include "libiberty.h"
#include <sys/types.h> /* For size_t. */
#include <string.h>
# include <strings.h>
# endif
void *
xmemdup (const void *input, size_t copy_size, size_t alloc_size)
void *output = xmalloc (alloc_size);
if (alloc_size > copy_size)
memset ((char *) output + copy_size, 0, alloc_size - copy_size);
return (void *) memcpy (output, input, copy_size);