/usr/include/colib/misc.h is in libiulib-dev 0.4+is+0.3-3ubuntu1.
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// Copyright 2006 Deutsches Forschungszentrum fuer Kuenstliche Intelligenz
// or its licensors, as applicable.
// Copyright 1995-2005 Thomas M. Breuel.
//
// You may not use this file except under the terms of the accompanying license.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you
// may not use this file except in compliance with the License. You may
// obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Project: iulib -- image understanding library
// File: misc.h
// Purpose: miscellaneous utility functions
// Responsible: tmb
// Reviewer:
// Primary Repository:
// Web Sites: www.iupr.org, www.dfki.de
/// \file misc.h
/// \brief A few utility functions.
#ifndef h_misc__
#define h_misc__
#include <string.h>
#include <stdlib.h>
namespace colib {
/// Swap two values
template <class T,class U>
inline void swap(T &a,U &b) {
T temp = a;
a = b;
b = temp;
}
/// The min of two integer values.
template <class T,class U>
inline T min(T a,U b) {
return a<b?a:b;
}
/// The max of two integer values.
template <class T,class U>
inline T max(T a,U b) {
return a>b?a:b;
}
/// Square of a value.
template <class T>
inline T sqr(T x) {
return x*x;
}
/// Absolute value of a value.
template <class T>
inline T abs(T x) {
return x<0?-x:x;
}
/// Heaviside function of a value.
template <class T>
inline T heaviside(T x) {
return x<0?0:x;
}
/// Boolean values, initialized to false; useful with hashtable implementations.
template <bool INITIAL>
struct Boolean {
bool value;
Boolean() {
value = INITIAL;
}
operator bool() {
return value;
}
operator bool&() {
return value;
}
void operator=(bool other) {
value = other;
}
};
/// Integer values initialized to the given value; useful with hashtable implementations.
template <int INITIAL>
struct integer {
int value;
integer() {
value = INITIAL;
}
operator int&() {
return value;
}
void operator=(int other) {
value = other;
}
};
/// Floating point values initialized to the given value; useful with hashtable implementations.
template <int INITIAL>
struct floating {
float value;
floating() {
value = INITIAL;
}
operator floating&() {
return value;
}
void operator=(int other) {
value = other;
}
};
}
#endif
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