diff options
author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-09-05 17:23:49 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-09-05 17:23:49 +0000 |
commit | 134ca08dd14585e30fab91cb909a254a259d6657 (patch) | |
tree | 6b0d57437d0e626166f290190b282f0d3a01e46e /transcode.c | |
parent | a1892af3d6f940222d84bf53fb32f00a8cd7c97b (diff) |
* transcode.c (econv_s_stateless_encoding): new method.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19156 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'transcode.c')
-rw-r--r-- | transcode.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/transcode.c b/transcode.c index 6d9cd7ba5f..429c6f4115 100644 --- a/transcode.c +++ b/transcode.c @@ -2336,6 +2336,47 @@ make_dummy_encoding(const char *name) /* * 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 @@ Init_transcode(void) 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); |