/* -----------------------------------------------------------------------
* 関数名 ： CUnicodeF::utf8_to_sjis
* 機能概要： UTF-8 -> SJIS へ文字列のコード変換
* 引数 ： (I) char *pUtf8Str - 変換元UTF-8文字列へのポインタ
* (O) int *nBytesOut - 変換後文字列のバイト数
* 戻り値 ： char* 変換後SJIS文字列へのポインタ
*
* 処理概要：
* -----------------------------------------------------------------------
*/
char *CUnicodeF::utf8_to_sjis(const char *pUtf8Str, int *nBytesOut)
{
int nNum, nBytes;
wchar_t *pwcWork = utf8_to_utf16be( pUtf8Str, &nNum, TRUE);
char *pcSjis = utf16be_to_sjis( pwcWork, &nBytes);
free( pwcWork);
*nBytesOut = nBytes;
return pcSjis;
}
void WinCodepageConverter::_unicodeToBuffer<1>(ByteBuffer& _destBuffer, ConstStringHolder<1> _srcString)
{
// An empty string needs special processing.
if(_srcString.empty())
return;
const uint8* data;
size_t sz;
ByteBuffer buf;
switch(getCodepage())
{
case CP_UTF8:
{
// UTF-8 -> UTF-8
data = _srcString.c_str();
sz = _srcString.size();
break;
}
case CP_UTF16LE:
{
// UTF-8 -> UTF-16LE
utf8_to_utf16le(buf, _srcString.c_str(), _srcString.size());
data = buf.data();
sz = buf.size();
break;
}
case CP_UTF16BE:
{
// UTF-8 -> UTF-16BE
utf8_to_utf16be(buf, _srcString.c_str(), _srcString.size());
data = buf.data();
sz = buf.size();
break;
}
case CP_UTF32LE:
{
// UTF-8 -> UTF-32LE
utf8_to_utf32le(buf, _srcString.c_str(), _srcString.size());
data = buf.data();
sz = buf.size();
break;
}
case CP_UTF32BE:
{
// UTF-8 -> UTF-32BE
utf8_to_utf32be(buf, _srcString.c_str(), _srcString.size());
data = buf.data();
sz = buf.size();
break;
}
default:
{
// UTF-8 -> UTF-16
Utf16Buffer buf16;
utf8_to_utf16(buf16, _srcString.c_str(), _srcString.size());
// UTF-16 -> destination code page
size_t maxsz = (buf16.size() + 10) * 4;
buf.resize(maxsz);
BOOL usedDefaultChar;
int r = WideCharToMultiByte(getCodepage(), 0,
char_cast<LPWSTR>(buf16.data()), buf16.size(),
char_cast<LPSTR>(buf.data()), buf.size(), 0, &usedDefaultChar);
sz = r;
data = buf.data();
if(r == 0 || usedDefaultChar)
UnicodeSupport::_throwCouldNotConvert(getName(), "UTF-16", buf16.data(), buf16.size() * 2);
}
}
appendDataToBuffer(_destBuffer, data, sz);
}
