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 } 39