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