ruby-changes:7635
From: akr <ko1@a...>
Date: Sat, 6 Sep 2008 02:24:03 +0900 (JST)
Subject: [ruby-changes:7635] Ruby:r19156 (trunk): * transcode.c (econv_s_stateless_encoding): new method.
akr 2008-09-06 02:23:49 +0900 (Sat, 06 Sep 2008) New Revision: 19156 http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=19156 Log: * transcode.c (econv_s_stateless_encoding): new method. Modified files: trunk/ChangeLog trunk/test/ruby/test_econv.rb trunk/transcode.c Index: ChangeLog =================================================================== --- ChangeLog (revision 19155) +++ ChangeLog (revision 19156) @@ -1,3 +1,7 @@ +Sat Sep 6 02:23:18 2008 Tanaka Akira <akr@f...> + + * transcode.c (econv_s_stateless_encoding): new method. + Sat Sep 6 02:01:59 2008 Tanaka Akira <akr@f...> * transcode.c (enc_arg): extracted from str_transcode_enc_args. Index: test/ruby/test_econv.rb =================================================================== --- test/ruby/test_econv.rb (revision 19155) +++ test/ruby/test_econv.rb (revision 19156) @@ -27,6 +27,15 @@ ec.primitive_errinfo) end + def test_s_stateless_encoding + assert_equal(Encoding::EUC_JP, Encoding::Converter.stateless_encoding("ISO-2022-JP")) + assert_equal(Encoding::EUC_JP, Encoding::Converter.stateless_encoding(Encoding::ISO_2022_JP)) + assert_nil(Encoding::Converter.stateless_encoding("EUC-JP")) + assert_nil(Encoding::Converter.stateless_encoding("UTF-8")) + assert_nil(Encoding::Converter.stateless_encoding("UTF-16BE")) + assert_nil(Encoding::Converter.stateless_encoding(Encoding::UTF_8)) + end + def test_new assert_kind_of(Encoding::Converter, Encoding::Converter.new("UTF-8", "EUC-JP")) assert_kind_of(Encoding::Converter, Encoding::Converter.new(Encoding::UTF_8, Encoding::EUC_JP)) Index: transcode.c =================================================================== --- transcode.c (revision 19155) +++ transcode.c (revision 19156) @@ -2336,6 +2336,47 @@ /* * call-seq: + * Encoding::Converter.stateless_encoding(string) => encoding or nil + * Encoding::Converter.stateless_encoding(encoding) => encoding or nil + * + * returns the corresponding stateless encoding. + * + * It returns nil if the argument is stateless encoding. + * + * "corresponding stateless encoding" is a stateless encoding which + * can represent all characters in the statefull encoding. + * + * So, no conversion undefined error occur from the stateful encoding to the stateless encoding. + * + * Currently, EUC-JP is the corresponding stateless encoding of ISO-2022-JP. + * + * Encoding::Converter.stateless_encoding("ISO-2022-JP") #=> #<Encoding:EUC-JP> + * + * (This may be changed in future because EUC-JP cannot distinguish JIS X 0208 1978 and 1983.) + */ +static VALUE +econv_s_stateless_encoding(VALUE klass, VALUE arg) +{ + const char *stateful_name, *stateless_name; + rb_encoding *stateful_enc, *stateless_enc; + + enc_arg(arg, &stateful_name, &stateful_enc); + + stateless_name = rb_econv_stateless_encoding(stateful_name); + + if (stateless_name == NULL) + return Qnil; + + stateless_enc = rb_enc_find(stateless_name); + + if (!stateless_enc) + stateless_enc = make_dummy_encoding(stateless_name); + + return rb_enc_from_encoding(stateless_enc); +} + +/* + * call-seq: * Encoding::Converter.new(source_encoding, destination_encoding) * Encoding::Converter.new(source_encoding, destination_encoding, opt) * @@ -3346,6 +3387,7 @@ rb_cEncodingConverter = rb_define_class_under(rb_cEncoding, "Converter", rb_cData); rb_define_alloc_func(rb_cEncodingConverter, econv_s_allocate); + rb_define_singleton_method(rb_cEncodingConverter, "stateless_encoding", econv_s_stateless_encoding, 1); rb_define_method(rb_cEncodingConverter, "initialize", econv_init, -1); rb_define_method(rb_cEncodingConverter, "inspect", econv_inspect, 0); rb_define_method(rb_cEncodingConverter, "source_encoding", econv_source_encoding, 0); -- ML: ruby-changes@q... Info: http://www.atdot.net/~ko1/quickml/