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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#include "vmime/charsetConverter_idna.hpp"
#include "vmime/exception.hpp"
#include "vmime/utility/stringUtils.hpp"
#include "vmime/utility/streamUtils.hpp"
#include "vmime/utility/outputStreamStringAdapter.hpp"
extern "C" {
#include "contrib/punycode/punycode.h"
#include "contrib/punycode/punycode.c"
}
#include "contrib/utf8/utf8.h"
namespace vmime {
charsetConverter_idna::charsetConverter_idna(
const charset& source,
const charset& dest,
const charsetConverterOptions& opts
)
: m_source(source),
m_dest(dest),
m_options(opts) {
}
charsetConverter_idna::~charsetConverter_idna() {
}
void charsetConverter_idna::convert(utility::inputStream& in, utility::outputStream& out, status* st) {
if (st) {
new (st) status();
}
// IDNA should be used for short strings, so it does not matter if we
// do not work directly on the stream
string inStr;
vmime::utility::outputStreamStringAdapter os(inStr);
vmime::utility::bufferedStreamCopy(in, os);
string outStr;
convert(inStr, outStr, st);
out << outStr;
}
void charsetConverter_idna::convert(const string& in, string& out, status* st) {
if (st) {
new (st) status();
}
out.clear();
if (m_dest == "idna") {
if (utility::stringUtils::is7bit(in)) {
if (st) {
st->inputBytesRead = in.length();
st->outputBytesWritten = in.length();
}
// No need to encode as Punycode
out = in;
return;
}
string inUTF8;
charset::convert(in, inUTF8, m_source, vmime::charsets::UTF_8);
const char* ch = inUTF8.c_str();
const char* end = inUTF8.c_str() + inUTF8.length();
std::vector <punycode_uint> unichars;
unichars.reserve(inUTF8.length());
while (ch < end) {
const utf8::uint32_t uc = utf8::unchecked::next(ch);
unichars.push_back(uc);
}
if (st) {
st->inputBytesRead = in.length();
}
punycode_uint inputLen = static_cast <punycode_uint>(unichars.size());
std::vector <char> output(inUTF8.length() * 2);
punycode_uint outputLen = static_cast <punycode_uint>(output.size());
const punycode_status status = punycode_encode(
inputLen, &unichars[0], /* case_flags */ NULL, &outputLen, &output[0]
);
if (status == punycode_success) {
out = string("xn--") + string(output.begin(), output.begin() + outputLen);
if (st) {
st->outputBytesWritten = out.length();
}
} else {
// TODO
}
} else if (m_source == "idna") {
if (in.length() < 5 || in.substr(0, 4) != "xn--") {
if (st) {
st->inputBytesRead = in.length();
st->outputBytesWritten = in.length();
}
// Not an IDNA string
out = in;
return;
}
punycode_uint inputLen = static_cast <punycode_uint>(in.length() - 4);
std::vector <punycode_uint> output(in.length() - 4);
punycode_uint outputLen = static_cast <punycode_uint>(output.size());
const punycode_status status = punycode_decode(
inputLen, &in[4], &outputLen, &output[0], /* case_flags */ NULL
);
if (st) {
st->inputBytesRead = in.length();
}
if (status == punycode_success) {
std::vector <char> outUTF8Bytes(outputLen * 4);
char* p = &outUTF8Bytes[0];
for (std::vector <punycode_uint>::const_iterator it = output.begin() ;
it != output.begin() + outputLen ; ++it) {
p = utf8::unchecked::append(*it, p);
}
string outUTF8(&outUTF8Bytes[0], p);
charset::convert(outUTF8, out, vmime::charsets::UTF_8, m_dest);
if (st) {
st->outputBytesWritten = out.length();
}
} else {
// TODO
}
}
}
shared_ptr <utility::charsetFilteredOutputStream>
charsetConverter_idna::getFilteredOutputStream(
utility::outputStream& /* os */,
const charsetConverterOptions& /* opts */
) {
// Not supported
return null;
}
} // vmime
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