160484Sobrien/* xmemdup.c -- Duplicate a memory buffer, using xcalloc. 260484Sobrien This trivial function is in the public domain. 360484Sobrien Jeff Garzik, September 1999. */ 460484Sobrien 589857Sobrien/* 689857Sobrien 789857Sobrien@deftypefn Replacement void* xmemdup (void *@var{input}, size_t @var{copy_size}, size_t @var{alloc_size}) 889857Sobrien 989857SobrienDuplicates a region of memory without fail. First, @var{alloc_size} bytes 1089857Sobrienare allocated, then @var{copy_size} bytes from @var{input} are copied into 1189857Sobrienit, and the new memory is returned. If fewer bytes are copied than were 1289857Sobrienallocated, the remaining memory is zeroed. 1389857Sobrien 1489857Sobrien@end deftypefn 1589857Sobrien 1689857Sobrien*/ 1789857Sobrien 1860484Sobrien#ifdef HAVE_CONFIG_H 1960484Sobrien#include "config.h" 2060484Sobrien#endif 2160484Sobrien#include "ansidecl.h" 2260484Sobrien#include "libiberty.h" 2360484Sobrien 2460484Sobrien#include <sys/types.h> /* For size_t. */ 2577298Sobrien#ifdef HAVE_STRING_H 2677298Sobrien#include <string.h> 27218822Sdim#else 28218822Sdim# ifdef HAVE_STRINGS_H 29218822Sdim# include <strings.h> 30218822Sdim# endif 3177298Sobrien#endif 3260484Sobrien 3360484SobrienPTR 34218822Sdimxmemdup (const PTR input, size_t copy_size, size_t alloc_size) 3560484Sobrien{ 3660484Sobrien PTR output = xcalloc (1, alloc_size); 37218822Sdim return (PTR) memcpy (output, input, copy_size); 3860484Sobrien} 39