Mercurial > hg > CbC > CbC_gcc
annotate libiberty/xmemdup.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children |
| rev | line source |
|---|---|
| 111 | 1 /* xmemdup.c -- Duplicate a memory buffer, using xmalloc. |
| 0 | 2 This trivial function is in the public domain. |
| 3 Jeff Garzik, September 1999. */ | |
| 4 | |
| 5 /* | |
| 6 | |
|
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f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
7 @deftypefn Replacement void* xmemdup (void *@var{input}, @ |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
8 size_t @var{copy_size}, size_t @var{alloc_size}) |
| 0 | 9 |
| 10 Duplicates a region of memory without fail. First, @var{alloc_size} bytes | |
| 11 are allocated, then @var{copy_size} bytes from @var{input} are copied into | |
| 12 it, and the new memory is returned. If fewer bytes are copied than were | |
| 13 allocated, the remaining memory is zeroed. | |
| 14 | |
| 15 @end deftypefn | |
| 16 | |
| 17 */ | |
| 18 | |
| 19 #ifdef HAVE_CONFIG_H | |
| 20 #include "config.h" | |
| 21 #endif | |
| 22 #include "ansidecl.h" | |
| 23 #include "libiberty.h" | |
| 24 | |
| 25 #include <sys/types.h> /* For size_t. */ | |
| 26 #ifdef HAVE_STRING_H | |
| 27 #include <string.h> | |
| 28 #else | |
| 29 # ifdef HAVE_STRINGS_H | |
| 30 # include <strings.h> | |
| 31 # endif | |
| 32 #endif | |
| 33 | |
| 34 PTR | |
| 35 xmemdup (const PTR input, size_t copy_size, size_t alloc_size) | |
| 36 { | |
| 111 | 37 PTR output = xmalloc (alloc_size); |
| 38 if (alloc_size > copy_size) | |
| 39 memset ((char *) output + copy_size, 0, alloc_size - copy_size); | |
| 0 | 40 return (PTR) memcpy (output, input, copy_size); |
| 41 } |