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}, @ 8 size_t @var{copy_size}, size_t @var{alloc_size}) 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 { 37 PTR output = xcalloc (1, alloc_size); 38 return (PTR) memcpy (output, input, copy_size); 39 } 40
