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b10647f1 JG |
1 | /* xmemdup.c -- Duplicate a memory buffer, using xcalloc. |
2 | This trivial function is in the public domain. | |
3 | Jeff Garzik, September 1999. */ | |
4 | ||
aaa5f039 DD |
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 | ||
b10647f1 JG |
18 | #ifdef HAVE_CONFIG_H |
19 | #include "config.h" | |
20 | #endif | |
21 | #include "ansidecl.h" | |
22 | #include "libiberty.h" | |
23 | ||
33c5ddcd | 24 | #include <sys/types.h> /* For size_t. */ |
d11ec6f0 ZW |
25 | #ifdef HAVE_STRING_H |
26 | #include <string.h> | |
bb99744f KG |
27 | #else |
28 | # ifdef HAVE_STRINGS_H | |
29 | # include <strings.h> | |
30 | # endif | |
d11ec6f0 | 31 | #endif |
33c5ddcd | 32 | |
b10647f1 | 33 | PTR |
7a17ef5e | 34 | xmemdup (const PTR input, size_t copy_size, size_t alloc_size) |
b10647f1 JG |
35 | { |
36 | PTR output = xcalloc (1, alloc_size); | |
bb99744f | 37 | return (PTR) memcpy (output, input, copy_size); |
b10647f1 | 38 | } |