* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
*
* Full author contact details are available in file CREDITS.
*
}
+std::string IconvProcessor::from() const
+{
+ return pimpl_->fromcode_;
+}
+
+
+std::string IconvProcessor::to() const
+{
+ return pimpl_->tocode_;
+}
+
+
namespace {
char const * inbuf = reinterpret_cast<char const *>(buf);
size_t inbytesleft = buflen * sizeof(InType);
- size_t const outsize = 32768;
- static char out[outsize];
- char * outbuf = out;
+ static std::vector<char> outbuf(32768);
+ // The number of UCS4 code points in buf is at most inbytesleft.
+ // The output encoding will use at most
+ // max_encoded_bytes(pimpl_->tocode_) per UCS4 code point.
+ size_t maxoutbufsize = max_encoded_bytes(processor.to()) * inbytesleft;
+ if (outbuf.size() < maxoutbufsize)
+ outbuf.resize(maxoutbufsize);
- int bytes = processor.convert(inbuf, inbytesleft, outbuf, outsize);
+ int bytes = processor.convert(inbuf, inbytesleft, &outbuf[0], outbuf.size());
if (bytes <= 0)
// Conversion failed
// FIXME Maybe throw an exception and handle that in the caller?
return vector<RetType>();
- RetType const * tmp = reinterpret_cast<RetType const *>(out);
+ RetType const * tmp = reinterpret_cast<RetType const *>(&outbuf[0]);
return vector<RetType>(tmp, tmp + bytes / sizeof(RetType));
}
out.clear();
}
+int max_encoded_bytes(std::string const & encoding)
+{
+ // FIXME: this information should be transferred to lib/encodings
+ // UTF8 uses at most 4 bytes to represent one UCS4 code point
+ // (see RFC 3629). RFC 2279 specifies 6 bytes, but that
+ // information is outdated, and RFC 2279 has been superseded by
+ // RFC 3629.
+ // The CJK encodings use (different) multibyte representation as well.
+ // All other encodings encode one UCS4 code point in one byte
+ // (and can therefore only encode a subset of UCS4)
+ // 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 == "ISO-2022-JP")
+ return 8;
+ else if (encoding == "BIG5" ||
+ encoding == "EUC-KR" ||
+ encoding == "EUC-CN" ||
+ encoding == "SJIS" ||
+ encoding == "GBK")
+ return 2;
+ else
+ return 1;
+}
+
} // namespace lyx