c1009b93fd
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58035 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/////////////////////////////////////////////////////////////////////////////
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// Name: math.h
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// Purpose: interface of global functions
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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/** @addtogroup group_funcmacro_math */
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//@{
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/**
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Returns a non-zero value if @a x is neither infinite nor NaN (not a
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number), returns 0 otherwise.
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@header{wx/math.h}
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*/
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int wxFinite(double x);
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/**
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Returns a non-zero value if x is NaN (not a number), returns 0 otherwise.
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@header{wx/math.h}
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*/
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bool wxIsNaN(double x);
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/**
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Converts the given array of 10 bytes (corresponding to 80 bits) to
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a float number according to the IEEE floating point standard format
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(aka IEEE standard 754).
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@see wxConvertToIeeeExtended() to perform the opposite operation
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*/
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wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes);
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/**
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Converts the given floating number @a num in a sequence of 10 bytes
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which are stored in the given array @a bytes (which must be large enough)
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according to the IEEE floating point standard format
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(aka IEEE standard 754).
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@see wxConvertFromIeeeExtended() to perform the opposite operation
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*/
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void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
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/**
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Small wrapper around round().
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*/
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int wxRound(double x);
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/**
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Returns true if both double values are identical. This is
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only reliable if both values have been assigned the same
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value.
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*/
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bool wxIsSameDouble(double x, double y);
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/**
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Return true of @a x is exactly zero. This is only reliable
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if it has been assigned 0.
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*/
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bool wxIsNullDouble(double x);
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//@}
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