| 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 | |
| 9 | Duplicates a region of memory without fail. First, @var{alloc_size} bytes |
| 10 | are allocated, then @var{copy_size} bytes from @var{input} are copied into |
| 11 | it, and the new memory is returned. If fewer bytes are copied than were |
| 12 | allocated, 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 | #else |
| 28 | # ifdef HAVE_STRINGS_H |
| 29 | # include <strings.h> |
| 30 | # endif |
| 31 | #endif |
| 32 | |
| 33 | PTR |
| 34 | xmemdup (const PTR input, size_t copy_size, size_t alloc_size) |
| 35 | { |
| 36 | PTR output = xcalloc (1, alloc_size); |
| 37 | return (PTR) memcpy (output, input, copy_size); |
| 38 | } |