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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 --> */
#ifndef D_HASH_FUNC_ENTRY_H
#define D_HASH_FUNC_ENTRY_H
#include "common.h"
#include <string>
#include <algorithm>
#include "DlAbortEx.h"
#include "fmt.h"
namespace aria2 {
template <typename HashFunc> struct HashFuncEntry {
typedef HashFunc HashFuncType;
std::string hashType;
HashFunc hashFunc;
HashFuncEntry(std::string hashType, const HashFunc& hashFunc)
: hashType(std::move(hashType)), hashFunc(hashFunc)
{
}
};
template <typename HashFunc> class FindHashFunc {
private:
const std::string& hashType_;
public:
FindHashFunc(const std::string& hashType) : hashType_(hashType) {}
bool operator()(const HashFuncEntry<HashFunc>& entry) const
{
return entry.hashType == hashType_;
}
};
template <class HashFuncEntry>
const typename HashFuncEntry::HashFuncType&
getHashFunc(HashFuncEntry* first, HashFuncEntry* last,
const std::string& hashType)
{
HashFuncEntry* e = std::find_if(
first, last,
FindHashFunc<typename HashFuncEntry::HashFuncType>(hashType));
if (e == last) {
throw DL_ABORT_EX(fmt("Hash type %s is not supported.", hashType.c_str()));
}
return e->hashFunc;
}
} // namespace aria2
#endif // D_HASH_FUNC_ENTRY_H
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