1 ! Copyright (C) 2009 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: alien alien.c-types arrays assocs byte-arrays io
4 io.binary io.streams.string kernel math math.parser namespaces
5 make parser prettyprint quotations sequences strings vectors
6 words macros math.functions math.bitwise fry generalizations
7 combinators.smart io.streams.byte-array io.encodings.binary
8 math.vectors combinators multiline ;
13 : big-endian? ( -- ? )
18 : set-big-endian ( -- )
19 big-endian? big-endian set ; inline
23 : >signed ( x n -- y )
24 2dup neg 1+ shift 1 = [ 2^ - ] [ drop ] if ;
26 : >endian ( obj n -- str )
27 big-endian get [ >be ] [ >le ] if ; inline
29 : unsigned-endian> ( obj -- str )
30 big-endian get [ be> ] [ le> ] if ; inline
32 : signed-endian> ( obj n -- str )
33 [ unsigned-endian> ] dip >signed ;
35 GENERIC: >n-byte-array ( obj n -- byte-array )
37 M: integer >n-byte-array ( m n -- byte-array ) >endian ;
39 ! for doing native, platform-dependent sized values
40 M: string >n-byte-array ( n string -- byte-array ) heap-size >n-byte-array ;
42 : s8>byte-array ( n -- byte-array ) 1 >n-byte-array ;
43 : u8>byte-array ( n -- byte-array ) 1 >n-byte-array ;
44 : s16>byte-array ( n -- byte-array ) 2 >n-byte-array ;
45 : u16>byte-array ( n -- byte-array ) 2 >n-byte-array ;
46 : s24>byte-array ( n -- byte-array ) 3 >n-byte-array ;
47 : u24>byte-array ( n -- byte-array ) 3 >n-byte-array ;
48 : s32>byte-array ( n -- byte-array ) 4 >n-byte-array ;
49 : u32>byte-array ( n -- byte-array ) 4 >n-byte-array ;
50 : s64>byte-array ( n -- byte-array ) 8 >n-byte-array ;
51 : u64>byte-array ( n -- byte-array ) 8 >n-byte-array ;
52 : s128>byte-array ( n -- byte-array ) 16 >n-byte-array ;
53 : u128>byte-array ( n -- byte-array ) 16 >n-byte-array ;
54 : write-float ( n -- byte-array ) float>bits 4 >n-byte-array ;
55 : write-double ( n -- byte-array ) double>bits 8 >n-byte-array ;
56 : write-c-string ( byte-array -- byte-array ) { 0 } B{ } append-as ;
62 { CHAR: c s8>byte-array }
63 { CHAR: C u8>byte-array }
64 { CHAR: s s16>byte-array }
65 { CHAR: S u16>byte-array }
66 { CHAR: t s24>byte-array }
67 { CHAR: T u24>byte-array }
68 { CHAR: i s32>byte-array }
69 { CHAR: I u32>byte-array }
70 { CHAR: q s64>byte-array }
71 { CHAR: Q u64>byte-array }
72 { CHAR: f write-float }
73 { CHAR: F write-float }
74 { CHAR: d write-double }
75 { CHAR: D write-double }
78 CONSTANT: unpack-table
80 { CHAR: c [ 8 signed-endian> ] }
81 { CHAR: C [ unsigned-endian> ] }
82 { CHAR: s [ 16 signed-endian> ] }
83 { CHAR: S [ unsigned-endian> ] }
84 { CHAR: t [ 24 signed-endian> ] }
85 { CHAR: T [ unsigned-endian> ] }
86 { CHAR: i [ 32 signed-endian> ] }
87 { CHAR: I [ unsigned-endian> ] }
88 { CHAR: q [ 64 signed-endian> ] }
89 { CHAR: Q [ unsigned-endian> ] }
90 { CHAR: f [ unsigned-endian> bits>float ] }
91 { CHAR: F [ unsigned-endian> bits>float ] }
92 { CHAR: d [ unsigned-endian> bits>double ] }
93 { CHAR: D [ unsigned-endian> bits>double ] }
96 CONSTANT: packed-length-table
114 MACRO: pack ( str -- quot )
115 [ pack-table at '[ _ execute ] ] { } map-as
117 '[ _ input<sequence ]
118 '[ _ B{ } append-outputs-as ] ;
122 : ch>packed-length ( ch -- n )
123 packed-length-table at ; inline
125 : packed-length ( str -- n )
126 [ ch>packed-length ] sigma ;
128 : pack-native ( seq str -- seq )
129 [ set-big-endian pack ] with-scope ; inline
131 : pack-be ( seq str -- seq )
132 [ big-endian on pack ] with-scope ; inline
134 : pack-le ( seq str -- seq )
135 [ big-endian off pack ] with-scope ; inline
139 : start/end ( seq -- seq1 seq2 )
140 [ 0 [ + ] accumulate nip dup ] keep v+ ; inline
142 MACRO: unpack ( str -- quot )
143 [ [ ch>packed-length ] { } map-as start/end ]
144 [ [ unpack-table at '[ @ ] ] { } map-as ] bi
145 [ '[ [ _ _ ] dip <slice> @ ] ] 3map
146 '[ _ cleave ] '[ _ output>array ] ;
150 : unpack-native ( seq str -- seq )
151 [ set-big-endian unpack ] with-scope ; inline
153 : unpack-be ( seq str -- seq )
154 [ big-endian on unpack ] with-scope ; inline
156 : unpack-le ( seq str -- seq )
157 [ big-endian off unpack ] with-scope ; inline
159 ERROR: packed-read-fail str bytes ;
163 : read-packed-bytes ( str -- bytes )
164 dup packed-length [ read dup length ] keep =
165 [ nip ] [ packed-read-fail ] if ; inline
169 : read-packed ( str quot -- seq )
170 [ read-packed-bytes ] swap bi ; inline
172 : read-packed-le ( str -- seq )
173 [ unpack-le ] read-packed ; inline
175 : read-packed-be ( str -- seq )
176 [ unpack-be ] read-packed ; inline
178 : read-packed-native ( str -- seq )
179 [ unpack-native ] read-packed ; inline