60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
// FILE: _meta.h
|
||
|
|
//
|
||
|
|
// =========================================================================
|
||
|
|
//
|
||
|
|
// Open Watcom Project
|
||
|
|
//
|
||
|
|
// Copyright (c) 2004-2010 The Open Watcom Contributors. All Rights Reserved.
|
||
|
|
//
|
||
|
|
// This file is automatically generated. Do not edit directly.
|
||
|
|
//
|
||
|
|
// =========================================================================
|
||
|
|
//
|
||
|
|
// Description: This header is an internal part of OWSTL. It provides the
|
||
|
|
// template meta programming fuction helpers
|
||
|
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
#ifndef __META_H_INCLUDED
|
||
|
|
#define __META_H_INCLUDED
|
||
|
|
|
||
|
|
#ifndef _ENABLE_AUTODEPEND
|
||
|
|
#pragma read_only_file;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef __cplusplus
|
||
|
|
#error This header file requires C++
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace _ow {
|
||
|
|
|
||
|
|
/* ------------------------------------------------------------------
|
||
|
|
* calc log2 of an integer rounded down
|
||
|
|
*/
|
||
|
|
template< int n >
|
||
|
|
struct log2_floor{
|
||
|
|
static const int value = log2_floor<n/2>::value+1;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct log2_floor<1>{
|
||
|
|
static const int value = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/* ------------------------------------------------------------------
|
||
|
|
* calc log2 of an integer rounded up
|
||
|
|
*/
|
||
|
|
template< int n >
|
||
|
|
struct log2_ceil{
|
||
|
|
static const int value = 1 + log2_floor<n-1>::value;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct log2_ceil<1>{
|
||
|
|
static const int value = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace _ow
|
||
|
|
|
||
|
|
#endif
|