/usr/include/ace/OS_NS_math.h is in libace-dev 6.0.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | // -*- C++ -*-
//=============================================================================
/**
* @file OS_NS_math.h
*
* $Id: OS_NS_math.h 89470 2010-03-12 12:12:12Z olli $
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
* @author Jesper S. M|ller<stophph@diku.dk>
* @author and a cast of thousands...
*
* Originally in OS.h.
*/
//=============================================================================
#ifndef ACE_OS_NS_MATH_H
# define ACE_OS_NS_MATH_H
# include /**/ "ace/pre.h"
# include "ace/config-all.h"
# if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
# endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/os_include/os_math.h"
#include /**/ "ace/ACE_export.h"
#if defined (ACE_EXPORT_MACRO)
# undef ACE_EXPORT_MACRO
#endif
#define ACE_EXPORT_MACRO ACE_Export
/*
* We inline and undef some functions that may be implemented
* as macros on some platforms. This way macro definitions will
* be usable later as there is no way to save the macro definition
* using the pre-processor.
*
*/
inline double ace_log2_helper (double x)
{
#if defined (log2)
return log2 (x);
#undef log2
#else
# if !defined (ACE_LACKS_LOG2)
return ACE_STD_NAMESPACE::log2 (x);
# else
/*
==================================================================
log (x)
k
log (x) = -------
b log (b)
k
meaning the binary logarithm of x using the natural logarithm, for
example, is:
log (x)
e
log (x) = -------
2 log (2)
e
==================================================================
*/
// Precomputed value of 1/log(2.0). Saves an expensive division and
// computing log(2.0) in each call.
double const _1_ln2 = 1.442695040888963407359924681002;
return log (x) * _1_ln2;
# endif /* !ACE_LACKS_LOG2 */
#endif /* defined (log2) */
}
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
namespace ACE_OS
{
/// This method computes the largest integral value not greater than x.
template <typename T>
T floor (T x)
{
return ACE_STD_NAMESPACE::floor (x);
}
/// This method computes the smallest integral value not less than x.
template <typename T>
T ceil (T x)
{
return ACE_STD_NAMESPACE::ceil (x);
}
/// This method computes the base-2 logarithm of x.
ACE_NAMESPACE_INLINE_FUNCTION
double log2 (double x);
} /* namespace ACE_OS */
ACE_END_VERSIONED_NAMESPACE_DECL
# if defined (ACE_HAS_INLINED_OSCALLS)
# if defined (ACE_INLINE)
# undef ACE_INLINE
# endif /* ACE_INLINE */
# define ACE_INLINE inline
# include "ace/OS_NS_math.inl"
# endif /* ACE_HAS_INLINED_OSCALLS */
# include /**/ "ace/post.h"
#endif /* ACE_OS_NS_MATH_H */
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