author | William Roberts <williamr@symbian.org> |
Fri, 23 Jul 2010 11:57:06 +0100 | |
branch | GCC_SURGE |
changeset 46 | 0a3770c1cffe |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// LMATH.CPP - Wrappers for Epoc32 Math functions |
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// |
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// |
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17 |
|
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|
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#include <e32math.h> |
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#include "FDLIBM.H" |
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#include <errno.h> |
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22 |
|
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extern "C" { |
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|
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/** |
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* Map the Symbian error value to the standard error number and put it into errno. |
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* @internalComponent |
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* @param aSymbianReturnValue the standard return value returned from the Symbian function. |
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* @param aNan the result of Math::Nan |
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*/ |
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void MapSymbianErrorCodeToErrno(int aSymbianReturnValue, int aNan) |
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{ |
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|
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switch(aSymbianReturnValue) |
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{ |
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case (KErrNone): |
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{ |
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//errno does not get set to 0 according to the standard. |
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//The user must initialize it before calling the function. |
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break; |
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} |
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case (KErrArgument): |
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{ |
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if (aNan) |
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errno = EDOM; |
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else |
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errno = EINVAL; |
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break; |
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} |
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case (KErrOverflow): |
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case (KErrUnderflow): |
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case (KErrTotalLossOfPrecision): |
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{ |
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errno = ERANGE; |
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break; |
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} |
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} |
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|
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} |
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|
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/** |
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Calculate arctangent. |
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Performs the trigonometric arctangent operation on x and returns an angle in the range from -PI/2 to PI/2 expressed in radians. |
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@return Arctangent of arg1. |
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@param arg1 Value whose arctangent has to be calculated. |
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*/ |
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EXPORT_C double atan (double arg1) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::ATan(result, arg1); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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Calculate cosine. |
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Performs the trigonometric cosine operation on x returning a value between -1 and 1. |
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@return Cosine of arg1. |
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@param arg1 Angle expressed in radians (180 degrees = PI radians). |
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*/ |
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EXPORT_C double cos (double arg1) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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88 |
|
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returnValue = Math::Cos(result, arg1); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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91 |
|
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return result; |
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} |
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94 |
|
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95 |
/** |
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96 |
Calculate sine. |
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Performs the trigonometric sine operation on x returning a value between -1 and 1. |
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@return Sine of arg1. |
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@param arg1 Angle expressed in radians (180 degrees = PI radians). |
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*/ |
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101 |
EXPORT_C double sin (double arg1) __SOFTFP |
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102 |
{ |
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103 |
double result; |
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104 |
int returnValue; |
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105 |
|
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106 |
returnValue = Math::Sin(result, arg1); |
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107 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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108 |
|
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109 |
return result; |
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110 |
} |
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111 |
|
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112 |
/** |
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113 |
Calculate tangent. |
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114 |
Performs the trigonometric tangent operation on arg1. |
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115 |
@return Tangent of arg1. |
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@param arg1 Angle expressed in radians (180 degrees = PI radians). |
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117 |
*/ |
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118 |
EXPORT_C double tan (double arg1) __SOFTFP |
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119 |
{ |
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double result; |
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121 |
int returnValue; |
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122 |
|
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returnValue = Math::Tan(result, arg1); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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125 |
|
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126 |
return result; |
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} |
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128 |
|
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129 |
/** |
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130 |
Calculate arccosine. |
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131 |
Performs the trigonometric arc cosine operation on x and returns an angle in the range from 0 to PI expressed in radians. |
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132 |
@return Arc cosine of arg1. |
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@param arg1 Value between -1 and 1 whose arc cosine has to be calculated. |
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134 |
*/ |
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135 |
EXPORT_C double acos (double arg1) __SOFTFP |
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136 |
{ |
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double result; |
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138 |
int returnValue; |
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139 |
|
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returnValue = Math::ACos(result, arg1); |
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141 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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142 |
|
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143 |
return result; |
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144 |
} |
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145 |
|
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146 |
/** |
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147 |
Calculate arcsine. |
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148 |
Performs the trigonometric arc sine operation on x and returns an angle in the range from -PI/2 to PI/2 expressed in radians. |
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149 |
@return Arc sine of arg1 |
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150 |
@param arg1 Value between -1 and 1 whose arc sine has to be calculated. |
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151 |
*/ |
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152 |
EXPORT_C double asin (double arg1) __SOFTFP |
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153 |
{ |
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154 |
double result; |
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155 |
int returnValue; |
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156 |
|
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returnValue = Math::ASin(result, arg1); |
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158 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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159 |
|
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160 |
return result; |
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161 |
} |
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162 |
|
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163 |
/** |
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164 |
Calculate exponential. |
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165 |
Returns the exponential value of parameter arg1. |
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166 |
@return Exponential of arg1 |
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167 |
@param arg1 Floating point value. |
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168 |
*/ |
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169 |
EXPORT_C double exp (double arg1) __SOFTFP |
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170 |
{ |
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171 |
double result; |
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172 |
int returnValue; |
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173 |
|
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174 |
returnValue = Math::Exp(result, arg1); |
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175 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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176 |
|
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177 |
return result; |
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178 |
} |
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179 |
|
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180 |
/** |
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181 |
Calculate natural logarithm. |
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182 |
Returns the natural logarithm of parameter arg1 |
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183 |
@return Logarithm of arg1. |
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@param arg1 Floating point value. |
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185 |
*/ |
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186 |
EXPORT_C double log (double arg1) __SOFTFP |
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187 |
{ |
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188 |
double result; |
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189 |
int returnValue; |
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190 |
|
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191 |
returnValue = Math::Ln(result, arg1); |
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192 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
193 |
|
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194 |
return result; |
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195 |
} |
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196 |
|
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197 |
/** |
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198 |
Calculate logarithm base 10. |
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199 |
Returns the logarithm base 10 of parameter arg1 |
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200 |
@return Logarithm base 10 of arg1 |
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201 |
@param arg1 Floating point value. |
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202 |
*/ |
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203 |
EXPORT_C double log10 (double arg1) __SOFTFP |
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204 |
{ |
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205 |
double result; |
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206 |
int returnValue; |
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207 |
|
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208 |
returnValue = Math::Log(result, arg1); |
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|
209 |
MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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210 |
|
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211 |
return result; |
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212 |
} |
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213 |
|
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/** |
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Calculate square root. |
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Returns the square root of parameter arg1. |
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@return Square root of arg1 |
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@param arg1 Non-negative floating point value. |
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*/ |
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EXPORT_C double sqrt (double arg1) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::Sqrt(result, arg1); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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Calculate arctangent, 2 parameters. |
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Performs the trigonometric arctangent operation on y/x and returns an angle in the range from -PI to PI expressed in radians, using the signs of the parameters to determine the quadrant. |
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The result is valid even if arg2 is 0 (angle is PI/2 or -PI/2). |
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In fact this function returns the angle of bidimensional vector (arg2,arg1). |
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@return Arctangent of arg1/arg2. |
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@param arg1 and arg2.Values from whose division has to be calculated the arctangent.i.e.: Coordinates for the vector whose angle is to be calculated. |
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*/ |
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EXPORT_C double atan2 (double arg1, double arg2) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::ATan(result, arg1, arg2); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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Calculate numeric power. |
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Returns arg1 raised to the power of arg2. |
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@return arg1 raised to the power of arg2. |
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@param arg1 - Base value. |
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@param arg2 - Exponent value. |
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*/ |
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EXPORT_C double pow (double arg1, double arg2) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::Pow(result, arg1, arg2); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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Return remainder of floating point division. |
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Performs division arg1/arg2 and returns the remainder of the operation. |
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@return Remainder of arg1/arg2. |
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@param arg1 and arg2 - Floating point values |
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*/ |
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EXPORT_C double fmod (double arg1, double arg2) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::Mod(result, arg1, arg2); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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Round to integral value in floating-point format |
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@return the integral value (represented as a double precision number) nearest to arg1 according to the prevailing rounding mode. |
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@param arg1 floating point value to round. |
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*/ |
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EXPORT_C double rint (double arg1) __SOFTFP |
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{ |
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double result; |
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int returnValue; |
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|
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returnValue = Math::Round(result, arg1, 0); |
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MapSymbianErrorCodeToErrno(returnValue, Math::IsNaN(result)); |
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|
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return result; |
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} |
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|
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/** |
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tests whether d is NaN |
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@return non-zero if d is NaN. Otherwise, 0 is returned. |
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@param d floating point value. |
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*/ |
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EXPORT_C int isnan (double d) __SOFTFP |
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{ |
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return Math::IsNaN(d); |
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} |
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|
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/** |
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test for infinity or not-a-number |
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@return 1 if the number d is Infinity, otherwise 0. |
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@param d floating point value to test. |
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*/ |
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EXPORT_C int isinf (double d) __SOFTFP |
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{ |
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return Math::IsInfinite(d); |
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} |
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/** |
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Test for finity. |
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@return a nonzero value if the x parameter is a finite number; |
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that is, if d is not +-, INF, NaNQ, or NaNS. |
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@param d floating point value to test. |
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*/ |
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EXPORT_C int finite (double d) __SOFTFP |
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{ |
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return Math::IsFinite(d); |
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} |
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} // end of extern "C" |
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