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Added some functor objects (for comparision and hash computations), similar to those present in the STL

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svn-id: r21510
This commit is contained in:
Max Horn 2006-03-31 07:22:49 +00:00
parent 111c0d1ddd
commit e0b3e777cf
1 changed files with 69 additions and 0 deletions
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69
common/func.h Normal file
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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id: map.h 21480 2006-03-28 15:15:45Z fingolfin $
*/
#ifndef COMMON_FUNC_H
#define COMMON_FUNC_H
#include "common/scummsys.h"
namespace Common {
template <class T>
struct EqualTo {
bool operator()(const T& x, const T& y) const { return x == y; }
};
template <class T>
struct Less {
bool operator()(const T& x, const T& y) const { return x < y; }
};
/**
* Base template for hash functor objects, used by HashMap.
* This needs to be specialized for every type that you need to hash.
*/
template <typename T> struct Hash;
#define GENERATE_TRIVIAL_HASH_FUNCTOR(T) \
template <> struct Hash<T> { \
uint operator()(T val) const { return (uint)val; } \
}
GENERATE_TRIVIAL_HASH_FUNCTOR(bool);
GENERATE_TRIVIAL_HASH_FUNCTOR(char);
GENERATE_TRIVIAL_HASH_FUNCTOR(signed char);
GENERATE_TRIVIAL_HASH_FUNCTOR(unsigned char);
GENERATE_TRIVIAL_HASH_FUNCTOR(wchar_t);
GENERATE_TRIVIAL_HASH_FUNCTOR(short);
GENERATE_TRIVIAL_HASH_FUNCTOR(int);
GENERATE_TRIVIAL_HASH_FUNCTOR(long);
GENERATE_TRIVIAL_HASH_FUNCTOR(unsigned short);
GENERATE_TRIVIAL_HASH_FUNCTOR(unsigned int);
GENERATE_TRIVIAL_HASH_FUNCTOR(unsigned long);
#undef GENERATE_TRIVIAL_HASH_FUNCTOR
} // End of namespace Common
#endif