mirror of https://github.com/aria2/aria2
141 lines
3.9 KiB
C++
141 lines
3.9 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2010 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "bencode2.h"
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#include <sstream>
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#include "fmt.h"
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#include "DlAbortEx.h"
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#include "error_code.h"
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#include "BufferedFile.h"
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#include "util.h"
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#include "ValueBaseBencodeParser.h"
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namespace aria2 {
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namespace bencode2 {
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SharedHandle<ValueBase> decode(const unsigned char* data, size_t len)
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{
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size_t end;
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return decode(data, len, end);
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}
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SharedHandle<ValueBase> decode(const std::string& data)
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{
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size_t end;
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return decode(reinterpret_cast<const unsigned char*>(data.c_str()),
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data.size(), end);
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}
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SharedHandle<ValueBase> decode(const unsigned char* data, size_t len,
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size_t& end)
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{
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ssize_t error;
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bittorrent::ValueBaseBencodeParser parser;
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SharedHandle<ValueBase> res =
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parser.parseFinal(reinterpret_cast<const char*>(data), len, error);
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if(error < 0) {
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throw DL_ABORT_EX2(fmt("Bencode decoding failed: error=%d",
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static_cast<int>(error)),
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error_code::BENCODE_PARSE_ERROR);
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}
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end = error;
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return res;
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}
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std::string encode(const ValueBase* vlb)
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{
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class BencodeValueBaseVisitor:public ValueBaseVisitor {
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private:
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std::ostringstream out_;
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public:
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virtual void visit(const String& string)
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{
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const std::string& s = string.s();
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out_ << s.size() << ":";
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out_.write(s.data(), s.size());
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}
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virtual void visit(const Integer& integer)
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{
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out_ << "i" << integer.i() << "e";
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}
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virtual void visit(const Bool& v) {}
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virtual void visit(const Null& v) {}
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virtual void visit(const List& list)
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{
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out_ << "l";
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for(List::ValueType::const_iterator i = list.begin(), eoi = list.end();
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i != eoi; ++i){
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(*i)->accept(*this);
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}
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out_ << "e";
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}
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virtual void visit(const Dict& dict)
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{
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out_ << "d";
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for(Dict::ValueType::const_iterator i = dict.begin(), eoi = dict.end();
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i != eoi; ++i){
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const std::string& key = (*i).first;
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out_ << key.size() << ":";
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out_.write(key.data(), key.size());
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(*i).second->accept(*this);
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}
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out_ << "e";
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}
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std::string getResult() const
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{
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return out_.str();
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}
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};
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BencodeValueBaseVisitor visitor;
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vlb->accept(visitor);
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return visitor.getResult();
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}
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std::string encode(const SharedHandle<ValueBase>& vlb)
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{
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return encode(vlb.get());
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}
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} // namespace bencode2
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} // namespace aria2
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