mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-12-30 21:31:03 +00:00
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/*
|
|
** templates.h
|
|
** Some useful template functions
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 1998-2006 Randy Heit
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
*/
|
|
|
|
#ifndef __TEMPLATES_H__
|
|
#define __TEMPLATES_H__
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma once
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <utility>
|
|
#include <algorithm>
|
|
|
|
//==========================================================================
|
|
//
|
|
// BinarySearch
|
|
//
|
|
// Searches an array sorted in ascending order for an element matching
|
|
// the desired key.
|
|
//
|
|
// Template parameters:
|
|
// ClassType - The class to be searched
|
|
// KeyType - The type of the key contained in the class
|
|
//
|
|
// Function parameters:
|
|
// first - Pointer to the first element in the array
|
|
// max - The number of elements in the array
|
|
// keyptr - Pointer to the key member of ClassType
|
|
// key - The key value to look for
|
|
//
|
|
// Returns:
|
|
// A pointer to the element with a matching key or NULL if none found.
|
|
//==========================================================================
|
|
|
|
template<class ClassType, class KeyType>
|
|
inline
|
|
const ClassType *BinarySearch (const ClassType *first, int max,
|
|
const KeyType ClassType::*keyptr, const KeyType key)
|
|
{
|
|
int min = 0;
|
|
--max;
|
|
|
|
while (min <= max)
|
|
{
|
|
int mid = (min + max) / 2;
|
|
const ClassType *probe = &first[mid];
|
|
const KeyType &seekey = probe->*keyptr;
|
|
if (seekey == key)
|
|
{
|
|
return probe;
|
|
}
|
|
else if (seekey < key)
|
|
{
|
|
min = mid + 1;
|
|
}
|
|
else
|
|
{
|
|
max = mid - 1;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// MIN
|
|
//
|
|
// Returns the minimum of a and b.
|
|
//==========================================================================
|
|
|
|
#ifdef MIN
|
|
#undef MIN
|
|
#endif
|
|
|
|
template<class T>
|
|
inline
|
|
const T MIN (const T a, const T b)
|
|
{
|
|
return a < b ? a : b;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// MAX
|
|
//
|
|
// Returns the maximum of a and b.
|
|
//==========================================================================
|
|
|
|
#ifdef MAX
|
|
#undef MAX
|
|
#endif
|
|
|
|
template<class T>
|
|
inline
|
|
const T MAX (const T a, const T b)
|
|
{
|
|
return a > b ? a : b;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// clamp
|
|
//
|
|
// Clamps in to the range [min,max].
|
|
//==========================================================================
|
|
|
|
template<class T>
|
|
inline
|
|
T clamp (const T in, const T min, const T max)
|
|
{
|
|
return in <= min ? min : in >= max ? max : in;
|
|
}
|
|
|
|
#endif //__TEMPLATES_H__
|