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* src/support/docstream.cpp (iconv_codecvt_facet::do_max_length()):

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- consider that not only utf8, but also most cjk encodings, are multibyte encodings
	  (fixes bug 4012)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19076 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Jürgen Spitzmüller 2007-07-14 13:00:24 +00:00
parent a97a8cde44
commit 402a13ba60
1 changed files with 20 additions and 1 deletions
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21
src/support/docstream.cpp
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@ -206,13 +206,32 @@ protected:
} }
virtual int do_max_length() const throw() virtual int do_max_length() const throw()
{ {
// FIXME: this information should be transferred to lib/encodings
// UTF8 uses at most 4 bytes to represent one UCS4 code point // UTF8 uses at most 4 bytes to represent one UCS4 code point
// (see RFC 3629). RFC 2279 specifies 6 bytes, but that // (see RFC 3629). RFC 2279 specifies 6 bytes, but that
// information is outdated, and RFC 2279 has been superseded by // information is outdated, and RFC 2279 has been superseded by
// RFC 3629. // RFC 3629.
// The CJK encodings use (different) multibyte representation as well.
// All other encodings encode one UCS4 code point in one byte // All other encodings encode one UCS4 code point in one byte
// (and can therefore only encode a subset of UCS4) // (and can therefore only encode a subset of UCS4)
return encoding_ == "UTF-8" ? 4 : 1; // Note that BIG5 and SJIS do not work with LaTeX (see lib/encodings).
// Furthermore, all encodings that use shifting (like SJIS) do not work with
// iconv_codecvt_facet.
if (encoding_ == "UTF-8" ||
encoding_ == "GB" ||
encoding_ == "EUC-TW")
return 4;
else if (encoding_ == "EUC-JP")
return 3;
else if (encoding_ == "BIG5" ||
encoding_ == "EUC-KR" ||
encoding_ == "EUC-CN" ||
encoding_ == "SJIS" ||
encoding_ == "GBK" ||
encoding_ == "JIS" )
return 2;
else
return 1;
} }
private: private:
/// Do the actual conversion. The interface is equivalent to that of /// Do the actual conversion. The interface is equivalent to that of