X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/77ffb5937e89927b621128789401db8921fe580f..8e77fd8bca165aab9709649d79a7cbc6a172d4e1:/include/wx/math.h?ds=inline diff --git a/include/wx/math.h b/include/wx/math.h index c847a7875c..5240f1759e 100644 --- a/include/wx/math.h +++ b/include/wx/math.h @@ -1,31 +1,74 @@ -///////////////////////////////////////////////////////////////////////////// -// Name: math.h -// Purpose: Declarations/definitions of common math functions -// Author: John Labenski and others -// Modified by: -// Created: 02/02/03 -// RCS-ID: -// Copyright: (c) -// Licence: wxWidgets licence -///////////////////////////////////////////////////////////////////////////// +/** +* Name: wx/math.h +* Purpose: Declarations/definitions of common math functions +* Author: John Labenski and others +* Modified by: +* Created: 02/02/03 +* RCS-ID: $Id$ +* Copyright: (c) John Labenski +* Licence: wxWindows licence +*/ + +/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */ #ifndef _WX_MATH_H_ #define _WX_MATH_H_ -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma interface "math.h" +#include "wx/defs.h" + +#include + +#ifndef M_PI + #define M_PI 3.1415926535897932384626433832795 #endif -#include "wx/defs.h" +/* Scaling factors for various unit conversions: 1 inch = 2.54 cm */ +#ifndef METRIC_CONVERSION_CONSTANT + #define METRIC_CONVERSION_CONSTANT (1/25.4) +#endif -// unknown __VISAGECC__, __SYMANTECCC__ +#ifndef mm2inches + #define mm2inches (METRIC_CONVERSION_CONSTANT) +#endif + +#ifndef inches2mm + #define inches2mm (1/(mm2inches)) +#endif + +#ifndef mm2twips + #define mm2twips (METRIC_CONVERSION_CONSTANT*1440) +#endif + +#ifndef twips2mm + #define twips2mm (1/(mm2twips)) +#endif + +#ifndef mm2pt + #define mm2pt (METRIC_CONVERSION_CONSTANT*72) +#endif + +#ifndef pt2mm + #define pt2mm (1/(mm2pt)) +#endif + + +/* unknown __VISAGECC__, __SYMANTECCC__ */ #if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__) #include #define wxFinite(x) _finite(x) -#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ +#elif defined(__MINGW64__) || defined(__clang__) + /* + add more compilers with C99 support here: using C99 isfinite() is + preferable to using BSD-ish finite() + */ + #define wxFinite(x) isfinite(x) +#elif ( defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ - defined(__HPUX__)||defined(__MWERKS__) + defined(__HPUX__) ) && ( !defined(wxOSX_USE_IPHONE) || wxOSX_USE_IPHONE == 0 ) +#ifdef __SOLARIS__ +#include +#endif #define wxFinite(x) finite(x) #else #define wxFinite(x) ((x) == (x)) @@ -36,11 +79,80 @@ #define wxIsNaN(x) _isnan(x) #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ - defined(__HPUX__)||defined(__MWERKS__) - #define wxIsNaN(x) isnan(x) + defined(__HPUX__) + #define wxIsNaN(x) isnan(x) #else #define wxIsNaN(x) ((x) != (x)) #endif +#ifdef __cplusplus + + #ifdef __INTELC__ + + inline bool wxIsSameDouble(double x, double y) + { + // VZ: this warning, given for operators==() and !=() is not wrong, as == + // shouldn't be used with doubles, but we get too many of them and + // removing these operators is probably not a good idea + // + // Maybe we should always compare doubles up to some "epsilon" precision + #pragma warning(push) + + // floating-point equality and inequality comparisons are unreliable + #pragma warning(disable: 1572) + + return x == y; + + #pragma warning(pop) + } + + #else /* !__INTELC__ */ + wxGCC_WARNING_SUPPRESS(float-equal) + inline bool wxIsSameDouble(double x, double y) { return x == y; } + wxGCC_WARNING_RESTORE(float-equal) + + #endif /* __INTELC__/!__INTELC__ */ + + inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); } + + inline int wxRound(double x) + { + wxASSERT_MSG( x > INT_MIN - 0.5 && x < INT_MAX + 0.5, + wxT("argument out of supported range") ); + + #if defined(HAVE_ROUND) + return int(round(x)); + #else + return (int)(x < 0 ? x - 0.5 : x + 0.5); + #endif + } +#endif /* __cplusplus */ + + +#if defined(__WINDOWS__) && !defined(__WXWINCE__) + #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c ) +#else + #define wxMulDivInt32( a , b , c ) (wxRound((a)*(((wxDouble)b)/((wxDouble)c)))) +#endif + +#if wxUSE_APPLE_IEEE +#ifdef __cplusplus + extern "C" { +#endif + /* functions from common/extended.c */ + WXDLLIMPEXP_BASE wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes); + WXDLLIMPEXP_BASE void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes); + + /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */ +#if WXWIN_COMPATIBILITY_2_8 + wxDEPRECATED( WXDLLIMPEXP_BASE wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) ); + wxDEPRECATED( WXDLLIMPEXP_BASE void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) ); +#endif + +#ifdef __cplusplus + } +#endif +#endif /* wxUSE_APPLE_IEEE */ + -#endif // _WX_MATH_H_ +#endif /* _WX_MATH_H_ */