1 ! Copyright (C) 2009 Daniel Ehrenberg.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: math kernel io.encodings combinators io io.encodings.utf16
4 sequences io.binary io.encodings.iana ;
9 utf32be "UTF-32BE" register-encoding
13 utf32le "UTF-32LE" register-encoding
17 utf32 "UTF-32" register-encoding
23 : char> ( stream encoding quot -- ch )
24 nip swap 4 swap stream-read dup length {
27 [ 3drop replacement-char ]
30 M: utf32be decode-char
33 M: utf32le decode-char
38 : >char ( char stream encoding quot -- )
39 nip 4 swap curry dip stream-write ; inline
41 M: utf32be encode-char
44 M: utf32le encode-char
49 CONSTANT: bom-le B{ 0xff 0xfe 0 0 }
51 CONSTANT: bom-be B{ 0 0 0xfe 0xff }
53 : bom>le/be ( bom -- le/be )
54 dup bom-le sequence= [ drop utf32le ] [
55 bom-be sequence= [ utf32be ] [ missing-bom ] if
58 M: utf32 <decoder> ( stream utf32 -- decoder )
59 drop 4 over stream-read bom>le/be <decoder> ;
61 M: utf32 <encoder> ( stream utf32 -- encoder )
62 drop bom-le over stream-write utf32le <encoder> ;