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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* 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 2 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
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "bencode2.h"
#include <sstream>
#include "fmt.h"
#include "DlAbortEx.h"
#include "error_code.h"
#include "BufferedFile.h"
#include "util.h"
#include "ValueBaseBencodeParser.h"
namespace aria2 {
namespace bencode2 {
std::shared_ptr<ValueBase> decode(const unsigned char* data, size_t len)
{
size_t end;
return decode(data, len, end);
}
std::shared_ptr<ValueBase> decode(const std::string& data)
{
size_t end;
return decode(reinterpret_cast<const unsigned char*>(data.c_str()),
data.size(), end);
}
std::shared_ptr<ValueBase> decode(const unsigned char* data, size_t len,
size_t& end)
{
ssize_t error;
bittorrent::ValueBaseBencodeParser parser;
std::shared_ptr<ValueBase> res =
parser.parseFinal(reinterpret_cast<const char*>(data), len, error);
if(error < 0) {
throw DL_ABORT_EX2(fmt("Bencode decoding failed: error=%d",
static_cast<int>(error)),
error_code::BENCODE_PARSE_ERROR);
}
end = error;
return res;
}
std::string encode(const ValueBase* vlb)
{
class BencodeValueBaseVisitor:public ValueBaseVisitor {
private:
std::ostringstream out_;
public:
virtual void visit(const String& string)
{
const std::string& s = string.s();
out_ << s.size() << ":";
out_.write(s.data(), s.size());
}
virtual void visit(const Integer& integer)
{
out_ << "i" << integer.i() << "e";
}
virtual void visit(const Bool& v) {}
virtual void visit(const Null& v) {}
virtual void visit(const List& list)
{
out_ << "l";
for(List::ValueType::const_iterator i = list.begin(), eoi = list.end();
i != eoi; ++i){
(*i)->accept(*this);
}
out_ << "e";
}
virtual void visit(const Dict& dict)
{
out_ << "d";
for(Dict::ValueType::const_iterator i = dict.begin(), eoi = dict.end();
i != eoi; ++i){
const std::string& key = (*i).first;
out_ << key.size() << ":";
out_.write(key.data(), key.size());
(*i).second->accept(*this);
}
out_ << "e";
}
std::string getResult() const
{
return out_.str();
}
};
BencodeValueBaseVisitor visitor;
vlb->accept(visitor);
return visitor.getResult();
}
std::string encode(const std::shared_ptr<ValueBase>& vlb)
{
return encode(vlb.get());
}
} // namespace bencode2
} // namespace aria2
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