68 lines
1.6 KiB
Factor
Executable File
68 lines
1.6 KiB
Factor
Executable File
! Copyright (C) 2009 Doug Coleman.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: alien.c-types namespaces io.binary fry
|
|
kernel math ;
|
|
IN: endian
|
|
|
|
SINGLETONS: big-endian little-endian ;
|
|
|
|
: native-endianness ( -- class )
|
|
1 <int> *char 0 = big-endian little-endian ? ;
|
|
|
|
: >signed ( x n -- y )
|
|
2dup neg 1+ shift 1 = [ 2^ - ] [ drop ] if ;
|
|
|
|
native-endianness \ native-endianness set-global
|
|
|
|
SYMBOL: endianness
|
|
|
|
\ native-endianness get-global endianness set-global
|
|
|
|
HOOK: >native-endian native-endianness ( obj n -- str )
|
|
|
|
M: big-endian >native-endian >be ;
|
|
|
|
M: little-endian >native-endian >le ;
|
|
|
|
HOOK: unsigned-native-endian> native-endianness ( obj -- str )
|
|
|
|
M: big-endian unsigned-native-endian> be> ;
|
|
|
|
M: little-endian unsigned-native-endian> le> ;
|
|
|
|
: signed-native-endian> ( obj n -- str )
|
|
[ unsigned-native-endian> ] dip >signed ;
|
|
|
|
HOOK: >endian endianness ( obj n -- str )
|
|
|
|
M: big-endian >endian >be ;
|
|
|
|
M: little-endian >endian >le ;
|
|
|
|
HOOK: endian> endianness ( seq -- n )
|
|
|
|
M: big-endian endian> be> ;
|
|
|
|
M: little-endian endian> le> ;
|
|
|
|
HOOK: unsigned-endian> endianness ( obj -- str )
|
|
|
|
M: big-endian unsigned-endian> be> ;
|
|
|
|
M: little-endian unsigned-endian> le> ;
|
|
|
|
: signed-endian> ( obj n -- str )
|
|
[ unsigned-endian> ] dip >signed ;
|
|
|
|
: with-endianness ( endian quot -- )
|
|
[ endianness ] dip with-variable ; inline
|
|
|
|
: with-big-endian ( quot -- )
|
|
big-endian swap with-endianness ; inline
|
|
|
|
: with-little-endian ( quot -- )
|
|
little-endian swap with-endianness ; inline
|
|
|
|
: with-native-endian ( quot -- )
|
|
\ native-endianness get-global swap with-endianness ; inline
|