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symport/e32/include/e32math.h
changeset 1 0a7b44b10206
child 2 806186ab5e14 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symport/e32/include/e32math.h	Thu Jun 25 15:59:54 2009 +0100
@@ -0,0 +1,483 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// e32\include\e32math.h
+// 
+//
+
+#ifndef __E32MATH_H__
+#define __E32MATH_H__
+#include <e32std.h>
+
+
+/**
+@publishedAll
+@released
+*/
+const TInt KMaxPrecision=15;
+/**
+@publishedAll
+@released
+
+This constant specifies the maximum number of significant digits available with floating 
+point computations. Rounding and string formatting methods will not use more digits than this.
+*/
+const TInt KPrecisionLimit=12;
+/**
+@publishedAll
+@released
+*/
+const TInt KMantissaBits=53;
+/**
+@publishedAll
+@released
+*/
+const TInt KMaxExponent=1023;
+/**
+@publishedAll
+@released
+*/
+const TInt KExponentBias=1022;
+/**
+@publishedAll
+@released
+*/
+const TInt KSpecialExponent=2047;
+//
+
+
+/**
+@publishedAll
+@released
+
+The maximum exponent for a 32-bit floating point number.
+*/
+const TInt KTReal32MaxExponent=128;			// changed from 127
+
+
+/**
+@publishedAll
+@released
+
+The minimum exponent for a 32-bit floating point number.
+*/
+const TInt KTReal32MinExponent=-125;
+/**
+@publishedAll
+@released
+*/
+const TInt KTReal32ExponentBias=126;
+/**
+@publishedAll
+@released
+*/
+const TInt KTReal32SpecialExponent=255;		// changed from KTReal32ExponentBad
+
+
+/**
+@publishedAll
+@released
+
+A zero exponent value for a 32-bit floating point number. 
+*/
+const TInt KTReal32ZeroExponent=0;
+//
+
+
+/**
+@publishedAll
+@released
+
+The maximum exponent for a 64-bit floating point number.
+*/
+const TInt KTReal64MaxExponent=1024;		// changed from 1023
+
+
+/**
+@publishedAll
+@released
+
+The minimum exponent for a 64-bit floating point number.
+*/
+const TInt KTReal64MinExponent=-1021;
+
+
+/**
+@publishedAll
+@released
+*/
+const TInt KTReal64ExponentBias=1022;
+
+
+/**
+@publishedAll
+@released
+*/
+const TInt KTReal64SpecialExponent=2047;	// changed from KTReal64BadExponent
+
+
+/**
+@publishedAll
+@released
+
+A zero exponent value for a 64-bit floating point number. 
+*/
+const TInt KTReal64ZeroExponent=0;
+//
+
+
+/**
+@publishedAll
+@released
+
+The minimum value of a 64-bit floating point number.
+*/
+const TReal KMinTReal=2.2250738585072015E-308;	// changed from TReal64
+
+
+/**
+@publishedAll
+@released
+
+The maximum value of a 64-bit floating point number.
+*/
+const TReal KMaxTReal=1.7976931348623157E+308;	//
+//
+
+
+/**
+@publishedAll
+@released
+
+The minimum value of a 32-bit floating point number.
+*/
+const TReal32 KMinTReal32=1.17549435E-38f;
+
+
+/**
+@publishedAll
+@released
+
+The maximum value of a 32-bit floating point number.
+*/
+const TReal32 KMaxTReal32=3.4028234663852885981170418348452e+38f;
+//
+
+
+/**
+@publishedAll
+@released
+
+The minimum value of a 64-bit floating point number.
+*/
+const TReal64 KMinTReal64=2.2250738585072015E-308;
+
+
+/**
+@publishedAll
+@released
+
+The maximum value of a 64-bit floating point number.
+*/
+const TReal64 KMaxTReal64=1.7976931348623157E+308;
+//
+
+
+/**
+@publishedAll
+@released
+*/
+const TReal KSqhf=0.70710678118654752440;
+
+
+/**
+@publishedAll
+@released
+
+Log 2 to the base "e".
+*/
+const TReal KRln2=1.4426950408889634;
+
+
+/**
+@publishedAll
+@released
+
+Log 10 to the base "e".
+*/
+const TReal KRln10=0.4342944819032518;
+
+
+/**
+@publishedAll
+@released
+
+Log 2 to the base 10.
+*/
+const TReal KRlg2=0.3010299956639812;
+
+
+/**
+@publishedAll
+@released
+
+The mathematical constant Pi.
+*/
+const TReal KPi=3.1415926535897932;
+
+
+/**
+@publishedAll
+@released
+
+The reciprocal of the mathematical constant Pi. 
+*/
+const TReal KPiInv=0.3183098861837907;
+
+
+/**
+@publishedAll
+@released
+
+The mathematical constant Pi divided by 2.
+*/
+const TReal KPiBy2=1.5707963267948966;
+
+
+/**
+@publishedAll
+@released
+
+Not used.
+*/
+const TReal KDrpi=0.6366197723675813;
+
+
+/**
+@publishedAll
+@released
+
+The square root of 3.
+*/
+const TReal KSqt3=1.7320508075688773;
+
+
+/**
+@publishedAll
+@released
+*/
+const TReal KMsq3=0.2679491924311227;
+
+
+/**
+@publishedAll
+@released
+
+The multiplying factor to convert radians to degrees.
+*/
+const TReal KRadToDeg=57.29577951308232;
+
+
+/**
+@publishedAll
+@released
+
+The multiplying factor to convert degrees to radians.
+*/
+const TReal KDegToRad=0.017453292519943296;
+
+
+
+
+class TRealX
+/**
+@publishedAll
+@released
+
+A class encapsulating an extended precision real value.
+
+This class provides 64 bit precision and a dynamic range of approximately
+1E-9863 to 1E+9863. All member functions are optimized for speed.
+*/
+	{
+public:
+	enum TRealXOrder {ELessThan=1,EEqual=2,EGreaterThan=4,EUnordered=8};
+public:
+	IMPORT_C TRealX();
+	IMPORT_C TRealX(TInt aInt);
+	IMPORT_C TRealX(TUint aInt);
+	IMPORT_C TRealX(TUint aExp, TUint aMantHi, TUint aMantLo);
+	IMPORT_C TRealX(const TInt64 &aInt);
+	IMPORT_C TRealX(TReal32 aReal) __SOFTFP;
+	IMPORT_C TRealX(TReal64 aReal) __SOFTFP;
+	IMPORT_C TRealX &operator=(TInt aInt);
+	IMPORT_C TRealX &operator=(TUint aInt);
+	IMPORT_C TRealX &operator=(const TInt64& aInt);
+	IMPORT_C TRealX &operator=(TReal32 aReal) __SOFTFP;
+	IMPORT_C TRealX &operator=(TReal64 aReal) __SOFTFP;
+	IMPORT_C TInt Set(TInt aInt);
+	IMPORT_C TInt Set(TUint aInt);
+	IMPORT_C TInt Set(const TInt64& aInt);
+	IMPORT_C TInt Set(TReal32 aReal) __SOFTFP;
+	IMPORT_C TInt Set(TReal64 aReal) __SOFTFP;
+	IMPORT_C operator TInt() const;
+	IMPORT_C operator TUint() const;
+	IMPORT_C operator TInt64() const;
+	IMPORT_C operator TReal32() const __SOFTFP;
+	IMPORT_C operator TReal64() const __SOFTFP;
+	IMPORT_C TInt GetTReal(TReal32 &aVal) const;
+	IMPORT_C TInt GetTReal(TReal64 &aVal) const;
+	IMPORT_C void SetZero(TBool aNegative=EFalse);
+	IMPORT_C void SetNaN();
+	IMPORT_C void SetInfinite(TBool aNegative);
+	IMPORT_C TBool IsZero() const;
+	IMPORT_C TBool IsNaN() const;
+	IMPORT_C TBool IsInfinite() const;
+	IMPORT_C TBool IsFinite() const;
+	IMPORT_C const TRealX &operator+=(const TRealX &aVal);
+	IMPORT_C const TRealX &operator-=(const TRealX &aVal);
+	IMPORT_C const TRealX &operator*=(const TRealX &aVal);
+	IMPORT_C const TRealX &operator/=(const TRealX &aVal);
+	IMPORT_C const TRealX &operator%=(const TRealX &aVal);
+	IMPORT_C TInt AddEq(const TRealX &aVal);
+	IMPORT_C TInt SubEq(const TRealX &aVal);
+	IMPORT_C TInt MultEq(const TRealX &aVal);
+	IMPORT_C TInt DivEq(const TRealX &aVal);
+	IMPORT_C TInt ModEq(const TRealX &aVal);
+	IMPORT_C TRealX operator+() const;
+	IMPORT_C TRealX operator-() const;
+	IMPORT_C TRealX &operator++();
+	IMPORT_C TRealX operator++(TInt);
+	IMPORT_C TRealX &operator--();
+	IMPORT_C TRealX operator--(TInt);
+	IMPORT_C TRealX operator+(const TRealX &aVal) const;
+	IMPORT_C TRealX operator-(const TRealX &aVal) const;
+	IMPORT_C TRealX operator*(const TRealX &aVal) const;
+	IMPORT_C TRealX operator/(const TRealX &aVal) const;
+	IMPORT_C TRealX operator%(const TRealX &aVal) const;
+	IMPORT_C TInt Add(TRealX& aResult,const TRealX &aVal) const;
+	IMPORT_C TInt Sub(TRealX& aResult,const TRealX &aVal) const;
+	IMPORT_C TInt Mult(TRealX& aResult,const TRealX &aVal) const;
+	IMPORT_C TInt Div(TRealX& aResult,const TRealX &aVal) const;
+	IMPORT_C TInt Mod(TRealX& aResult,const TRealX &aVal) const;
+	IMPORT_C TRealXOrder Compare(const TRealX& aVal) const;
+	inline TBool operator==(const TRealX &aVal) const;
+	inline TBool operator!=(const TRealX &aVal) const;
+	inline TBool operator>=(const TRealX &aVal) const;
+	inline TBool operator<=(const TRealX &aVal) const;
+	inline TBool operator>(const TRealX &aVal) const;
+	inline TBool operator<(const TRealX &aVal) const;
+public:
+    /**
+	The mantissa.
+	*/
+	// Represented as two adjacent 32 bit values, rather than one 64 value.
+	// This is to avoid EABI introduced padding overheads and BC breakages. 
+	// This representation works because the mantissa is always accessed from
+	// assembler code as two 32 bit quantities. The C++ code that accesses it
+	// now constructs an automatic TInt64 with the two components.
+	TUint32 iMantLo;
+	TUint32 iMantHi;
+	
+	/**
+	The sign: 0 for +, 1 for -
+	*/
+	TInt8 iSign;	
+	
+	/**
+	Flags: 0 for exact, 1 for rounded down, 2 for rounded up
+	*/ 
+	TUint8 iFlag;
+	
+	/**
+	Exponent: biased by 32767, iExp=0 => zero, +65535 => infinity or NaN
+	*/
+	TUint16 iExp;
+	};
+
+
+
+
+struct SPoly
+/**
+@publishedAll
+@released
+
+A structure containing the set of coefficients for a polynomial.
+
+@see Math::Poly
+*/
+    {
+    TInt num;
+	TReal c[1];
+    };
+
+
+
+
+class Math
+/**
+@publishedAll
+@released
+
+A collection of mathematical functions.
+*/
+	{
+public:
+	IMPORT_C static TInt ACos(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt ASin(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt ATan(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt ATan(TReal &aTrg,const TReal &aSrcY,const TReal &aSrcX);
+	IMPORT_C static TInt Cos(TReal &aTrg,const TReal &aSrc);
+	
+	/**
+	This function is not implemented by Symbian OS.
+	*/
+	IMPORT_C static TInt DtoR(TReal &aTrg,const TDesC &aSrc,TInt &aPos,const TChar aPoint);
+	IMPORT_C static TInt Exp(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Frac(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Int(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Int(TInt16 &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Int(TInt32 &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Log(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Ln(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Mod(TReal &aTrg,const TReal &aSrc,const TReal &aModulus);
+	IMPORT_C static TReal Poly(TReal aVal,const SPoly *aPoly) __SOFTFP;
+	IMPORT_C static TInt Pow(TReal &aTrg,const TReal &aSrc,const TReal &aPower);
+	IMPORT_C static TInt Pow10(TReal &aTrg,const TInt exp);
+	IMPORT_C static TInt Rand(TInt64 &aSeed);
+	IMPORT_C static TReal FRand(TInt64 &aSeed) __SOFTFP;
+	IMPORT_C static TUint32 Random();
+	IMPORT_C static TInt Round(TReal &aTrg,const TReal &aSrc,TInt aDecimalPlaces);
+	IMPORT_C static TInt Sin(TReal &aTrg,const TReal &aSrc); 
+	IMPORT_C static TInt Sqrt(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TInt Tan(TReal &aTrg,const TReal &aSrc);
+	IMPORT_C static TBool IsZero(const TReal &aVal);
+	IMPORT_C static TBool IsNaN(const TReal &aVal);
+	IMPORT_C static TBool IsInfinite(const TReal &aVal);
+	IMPORT_C static TBool IsFinite(const TReal &aVal);
+	IMPORT_C static void PolyX(TRealX& aY, const TRealX& aX, TInt aDeg, const TRealX *aCoef);
+	static TInt MultPow10X(TRealX& aTrg, TInt aPower);
+	IMPORT_C static void Mul64(Int64 aX, Int64 aY, Int64& aOutH, Uint64& aOutL);
+	IMPORT_C static void UMul64(Uint64 aX, Uint64 aY, Uint64& aOutH, Uint64& aOutL);
+	IMPORT_C static Int64 DivMod64(Int64 aDividend, Int64 aDivisor, Int64& aRemainder);
+	IMPORT_C static Uint64 UDivMod64(Uint64 aDividend, Uint64 aDivisor, Uint64& aRemainder);
+private:
+	IMPORT_C static void SetZero(TReal &aVal,TInt aSign=0);
+	IMPORT_C static void SetNaN(TReal &aVal);
+	IMPORT_C static void SetInfinite(TReal &aVal,TInt aSign);
+	};
+
+#include <e32math.inl>
+
+#endif // __E32MATH_H__
FCL/sftools/dev/hostenv/cpptoolsplat