1 ! Copyright (C) 2006 Adam Langley and Chris Double.
2 ! Adam Langley was the original author of this work.
4 ! Chris Double modified it to fix bugs and get it working
5 ! correctly under the latest versions of Factor.
7 ! See http://factorcode.org/license.txt for BSD license.
9 USING: namespaces sequences kernel math io math.functions
10 io.binary strings classes words sbufs classes.tuple arrays
11 vectors byte-arrays quotations hashtables assocs help.syntax
12 help.markup splitting io.streams.byte-array io.encodings.string
13 io.encodings.utf8 io.encodings.binary combinators accessors
14 locals prettyprint compiler.units sequences.private
15 classes.tuple.private vocabs.loader ;
18 GENERIC: (serialize) ( obj -- )
22 ! Variable holding a assoc of objects already serialized
29 M: id hashcode* obj>> hashcode* ;
31 M: id equal? over id? [ [ obj>> ] bi@ eq? ] [ 2drop f ] if ;
33 : add-object ( obj -- )
34 #! Add an object to the sequence of already serialized
36 serialized get [ assoc-size swap <id> ] keep set-at ;
38 : object-id ( obj -- id )
39 #! Return the id of an already serialized object
40 <id> serialized get at ;
42 ! Numbers are serialized as follows:
44 ! 1<=x<=126 => B{ x | 0x80 }
45 ! x>127 => B{ length(x) x[0] x[1] ... }
46 ! x>2^1024 => B{ 0xff length(x) x[0] x[1] ... }
47 ! The last case is needed because a very large number would
48 ! otherwise be confused with a small number.
49 : serialize-cell ( n -- )
65 : deserialize-cell ( -- n )
67 { [ dup HEX: ff = ] [ drop deserialize-cell read be> ] }
68 { [ dup HEX: 80 >= ] [ HEX: 80 bitxor ] }
72 : serialize-shared ( obj quot -- )
75 [ CHAR: o write1 serialize-cell drop ]
78 M: f (serialize) ( obj -- )
81 M: integer (serialize) ( obj -- )
85 dup 0 < [ neg CHAR: m ] [ CHAR: p ] if write1
89 M: float (serialize) ( obj -- )
91 double>bits serialize-cell ;
93 : serialize-seq ( obj code -- )
97 [ length serialize-cell ]
98 [ [ (serialize) ] each ] tri
99 ] curry serialize-shared ;
101 M: tuple (serialize) ( obj -- )
104 [ class (serialize) ]
106 [ tuple>array rest (serialize) ]
110 M: array (serialize) ( obj -- )
111 CHAR: a serialize-seq ;
113 M: quotation (serialize) ( obj -- )
116 [ >array (serialize) ] [ add-object ] bi
119 M: hashtable (serialize) ( obj -- )
122 [ add-object ] [ >alist (serialize) ] bi
125 M: byte-array (serialize) ( obj -- )
129 [ length serialize-cell ]
133 M: string (serialize) ( obj -- )
139 [ length serialize-cell ]
144 : serialize-true ( word -- )
145 drop CHAR: t write1 ;
147 : serialize-gensym ( word -- )
151 [ def>> (serialize) ]
152 [ props>> (serialize) ]
156 : serialize-word ( word -- )
158 [ name>> (serialize) ]
159 [ vocabulary>> (serialize) ]
162 M: word (serialize) ( obj -- )
164 { [ dup t eq? ] [ serialize-true ] }
165 { [ dup vocabulary>> not ] [ serialize-gensym ] }
169 M: wrapper (serialize) ( obj -- )
171 wrapped>> (serialize) ;
173 DEFER: (deserialize) ( -- obj )
177 : intern-object ( obj -- )
178 deserialized get push ;
180 : deserialize-false ( -- f )
183 : deserialize-true ( -- f )
186 : deserialize-positive-integer ( -- number )
189 : deserialize-negative-integer ( -- number )
190 deserialize-positive-integer neg ;
192 : deserialize-zero ( -- number )
195 : deserialize-float ( -- float )
196 deserialize-cell bits>double ;
198 : (deserialize-string) ( -- string )
199 deserialize-cell read utf8 decode ;
201 : deserialize-string ( -- string )
202 (deserialize-string) dup intern-object ;
204 : deserialize-word ( -- word )
205 (deserialize) (deserialize) 2dup [ require ] keep lookup
208 2array unparse "Unknown word: " prepend throw
211 : deserialize-gensym ( -- word )
214 [ (deserialize) define ]
215 [ (deserialize) >>props drop ]
219 : deserialize-wrapper ( -- wrapper )
220 (deserialize) <wrapper> ;
222 :: (deserialize-seq) ( exemplar quot -- seq )
223 deserialize-cell exemplar new-sequence
225 [ dup [ drop quot call ] change-each ] bi ; inline
227 : deserialize-array ( -- array )
228 { } [ (deserialize) ] (deserialize-seq) ;
230 : deserialize-quotation ( -- array )
231 (deserialize) >quotation dup intern-object ;
233 : deserialize-byte-array ( -- byte-array )
234 B{ } [ read1 ] (deserialize-seq) ;
236 : deserialize-hashtable ( -- hashtable )
239 [ (deserialize) update ]
242 : copy-seq-to-tuple ( seq tuple -- )
243 [ dup length ] dip [ set-array-nth ] curry 2each ;
245 : deserialize-tuple ( -- array )
246 #! Ugly because we have to intern the tuple before reading
252 [ [ copy-seq-to-tuple ] keep ] bi*
255 : deserialize-unknown ( -- object )
256 deserialize-cell deserialized get nth ;
258 : deserialize* ( -- object ? )
261 { CHAR: A [ deserialize-byte-array ] }
262 { CHAR: F [ deserialize-float ] }
263 { CHAR: T [ deserialize-tuple ] }
264 { CHAR: W [ deserialize-wrapper ] }
265 { CHAR: a [ deserialize-array ] }
266 { CHAR: h [ deserialize-hashtable ] }
267 { CHAR: m [ deserialize-negative-integer ] }
268 { CHAR: n [ deserialize-false ] }
269 { CHAR: t [ deserialize-true ] }
270 { CHAR: o [ deserialize-unknown ] }
271 { CHAR: p [ deserialize-positive-integer ] }
272 { CHAR: q [ deserialize-quotation ] }
273 { CHAR: s [ deserialize-string ] }
274 { CHAR: w [ deserialize-word ] }
275 { CHAR: G [ deserialize-word ] }
276 { CHAR: z [ deserialize-zero ] }
282 : (deserialize) ( -- obj )
283 deserialize* [ "End of stream" throw ] unless ;
287 : deserialize ( -- obj )
288 V{ } clone deserialized
289 [ (deserialize) ] with-variable ;
291 : serialize ( obj -- )
292 H{ } clone serialized [ (serialize) ] with-variable ;
294 : bytes>object ( bytes -- obj )
295 binary [ deserialize ] with-byte-reader ;
297 : object>bytes ( obj -- bytes )
298 binary [ serialize ] with-byte-writer ;