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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <climits>
namespace Gecode { namespace Support {
/// Description of integer types
enum IntType {
IT_CHAR = 0, ///< char integer type
IT_SHRT = 1, ///< short integer type
IT_INT = 2 ///< integer type
};
/// Return type required to represent \a n
IntType u_type(unsigned int n);
/// Return type required to represent \a n
IntType s_type(signed int n);
/// Traits to for information about integer types
template<class IntType>
class IntTypeTraits {};
/// Traits for signed char
template<>
class IntTypeTraits<signed char> {
public:
/// Corresponding unsigned type
typedef unsigned char utype;
/// Corresponding signed type
typedef signed char stype;
/// Minimal value
static const signed char min = SCHAR_MIN;
/// Maximal value
static const signed char max = SCHAR_MAX;
/// Description of type
static const IntType description = IT_CHAR;
};
/// Traits for unsigned char
template<>
class IntTypeTraits<unsigned char> {
public:
/// Corresponding unsigned type
typedef unsigned char utype;
/// Corresponding signed type
typedef signed char stype;
/// Minimal value
static const unsigned char min = 0;
/// Maximal value
static const unsigned char max = UCHAR_MAX;
/// Description of type
static const IntType description = IT_CHAR;
};
/// Traits for signed short int
template<>
class IntTypeTraits<signed short int> {
public:
/// Corresponding unsigned type
typedef unsigned short int utype;
/// Corresponding signed type
typedef signed short int stype;
/// Minimal value
static const signed short int min = SHRT_MIN;
/// Maximal value
static const signed short int max = SHRT_MAX;
/// Description of type
static const IntType description = IT_SHRT;
};
/// Traits for unsigned short int
template<>
class IntTypeTraits<unsigned short int> {
public:
/// Corresponding unsigned type
typedef unsigned short int utype;
/// Corresponding signed type
typedef signed short int stype;
/// Minimal value
static const unsigned short int min = 0;
/// Maximal value
static const unsigned short int max = USHRT_MAX;
/// Description of type
static const IntType description = IT_SHRT;
};
/// Traits for signed integer
template<>
class IntTypeTraits<signed int> {
public:
/// Corresponding unsigned type
typedef unsigned int utype;
/// Corresponding signed type
typedef signed int stype;
/// Minimal value
static const signed int min = INT_MIN;
/// Maximal value
static const signed int max = INT_MAX;
/// Description of type
static const IntType description = IT_INT;
};
/// Traits for unsigned integer
template<>
class IntTypeTraits<unsigned int> {
public:
/// Corresponding unsigned type
typedef unsigned int utype;
/// Corresponding signed type
typedef signed int stype;
/// Minimal value
static const unsigned int min = 0;
/// Maximal value
static const unsigned int max = UINT_MAX;
/// Description of type
static const IntType description = IT_INT;
};
forceinline IntType
u_type(unsigned int n) {
if (n < UCHAR_MAX)
return IT_CHAR;
else if (n < USHRT_MAX)
return IT_SHRT;
else
return IT_INT;
}
forceinline IntType
s_type(int n) {
if ((n > SCHAR_MIN) && (n < SCHAR_MAX))
return IT_CHAR;
else if ((n > SHRT_MIN) && (n < SHRT_MAX))
return IT_SHRT;
else
return IT_INT;
}
}}
// STATISTICS: support-any
|
