1 ! Copyright (C) 2009 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: alien.c-types ascii assocs combinators combinators.smart
4 endian fry io kernel macros math math.statistics math.vectors
8 GENERIC: >n-byte-array ( obj n -- byte-array )
10 M: integer >n-byte-array ( m n -- byte-array ) >endian ;
12 ! for doing native, platform-dependent sized values
13 M: string >n-byte-array ( n string -- byte-array ) heap-size >n-byte-array ;
15 : s8>byte-array ( n -- byte-array ) 1 >n-byte-array ;
16 : u8>byte-array ( n -- byte-array ) 1 >n-byte-array ;
17 : s16>byte-array ( n -- byte-array ) 2 >n-byte-array ;
18 : u16>byte-array ( n -- byte-array ) 2 >n-byte-array ;
19 : s24>byte-array ( n -- byte-array ) 3 >n-byte-array ;
20 : u24>byte-array ( n -- byte-array ) 3 >n-byte-array ;
21 : s32>byte-array ( n -- byte-array ) 4 >n-byte-array ;
22 : u32>byte-array ( n -- byte-array ) 4 >n-byte-array ;
23 : s64>byte-array ( n -- byte-array ) 8 >n-byte-array ;
24 : u64>byte-array ( n -- byte-array ) 8 >n-byte-array ;
25 : s128>byte-array ( n -- byte-array ) 16 >n-byte-array ;
26 : u128>byte-array ( n -- byte-array ) 16 >n-byte-array ;
27 : write-float ( n -- byte-array ) float>bits 4 >n-byte-array ;
28 : write-double ( n -- byte-array ) double>bits 8 >n-byte-array ;
29 : write-c-string ( byte-array -- byte-array ) { 0 } B{ } append-as ;
33 : expand-pack-format ( str -- str' )
36 [ [ 0 or 10 * ] [ CHAR: 0 - ] bi* + f ]
37 [ [ 1 or ] [ <string> ] bi* f swap ] if
38 ] { } map-as "" concat-as nip ; foldable
42 { CHAR: c s8>byte-array }
43 { CHAR: C u8>byte-array }
44 { CHAR: s s16>byte-array }
45 { CHAR: S u16>byte-array }
46 { CHAR: t s24>byte-array }
47 { CHAR: T u24>byte-array }
48 { CHAR: i s32>byte-array }
49 { CHAR: I u32>byte-array }
50 { CHAR: q s64>byte-array }
51 { CHAR: Q u64>byte-array }
52 { CHAR: f write-float }
53 { CHAR: F write-float }
54 { CHAR: d write-double }
55 { CHAR: D write-double }
58 CONSTANT: unpack-table
60 { CHAR: c [ 8 signed-endian> ] }
61 { CHAR: C [ unsigned-endian> ] }
62 { CHAR: s [ 16 signed-endian> ] }
63 { CHAR: S [ unsigned-endian> ] }
64 { CHAR: t [ 24 signed-endian> ] }
65 { CHAR: T [ unsigned-endian> ] }
66 { CHAR: i [ 32 signed-endian> ] }
67 { CHAR: I [ unsigned-endian> ] }
68 { CHAR: q [ 64 signed-endian> ] }
69 { CHAR: Q [ unsigned-endian> ] }
70 { CHAR: f [ unsigned-endian> bits>float ] }
71 { CHAR: F [ unsigned-endian> bits>float ] }
72 { CHAR: d [ unsigned-endian> bits>double ] }
73 { CHAR: D [ unsigned-endian> bits>double ] }
76 CONSTANT: packed-length-table
96 MACRO: pack ( str -- quot )
98 [ pack-table at '[ _ execute ] ] { } map-as
99 '[ [ [ _ spread ] input<sequence ] B{ } append-outputs-as ] ;
101 : ch>packed-length ( ch -- n )
102 packed-length-table at ; inline
104 : packed-length ( str -- n )
105 [ ch>packed-length ] map-sum ;
107 : pack-native ( seq str -- seq )
108 '[ _ _ pack ] with-native-endian ; inline
110 : pack-be ( seq str -- seq )
111 '[ _ _ pack ] with-big-endian ; inline
113 : pack-le ( seq str -- seq )
114 '[ _ _ pack ] with-little-endian ; inline
118 : start/end ( seq -- seq1 seq2 )
119 [ cum-sum0 dup ] keep v+ ; inline
123 MACRO: unpack ( str -- quot )
125 [ [ ch>packed-length ] { } map-as start/end ]
126 [ [ unpack-table at '[ @ ] ] { } map-as ] bi
127 [ '[ [ _ _ ] dip <slice> @ ] ] 3map
128 '[ [ _ cleave ] output>array ] ;
130 : unpack-native ( seq str -- seq )
131 '[ _ _ unpack ] with-native-endian ; inline
133 : unpack-be ( seq str -- seq )
134 '[ _ _ unpack ] with-big-endian ; inline
136 : unpack-le ( seq str -- seq )
137 '[ _ _ unpack ] with-little-endian ; inline
139 ERROR: packed-read-fail str bytes ;
143 : read-packed-bytes ( str -- bytes )
144 dup packed-length [ read dup length ] keep =
145 [ nip ] [ packed-read-fail ] if ; inline
149 : read-packed ( str quot -- seq )
150 [ read-packed-bytes ] swap bi ; inline
152 : read-packed-le ( str -- seq )
153 [ unpack-le ] read-packed ; inline
155 : read-packed-be ( str -- seq )
156 [ unpack-be ] read-packed ; inline
158 : read-packed-native ( str -- seq )
159 [ unpack-native ] read-packed ; inline