stdcpp/src/complex.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 02:01:42 +0200
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/*
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 * © Portions copyright (c) 2006-2007 Nokia Corporation.  All rights reserved.
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 *
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 * Copyright (c) 1999
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 * Silicon Graphics Computer Systems, Inc.
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 *
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 * Copyright (c) 1999 
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 * Boris Fomitchev
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 *
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 * This material is provided "as is", with absolutely no warranty expressed
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 * or implied. Any use is at your own risk.
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 *
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 * Permission to use or copy this software for any purpose is hereby granted 
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 * without fee, provided the above notices are retained on all copies.
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 * Permission to modify the code and to distribute modified code is granted,
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 * provided the above notices are retained, and a notice that the code was
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 * modified is included with the above copyright notice.
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 *
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 */ 
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# include "stlport_prefix.h"
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// Complex division and square roots.
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#include "complex_impl.h"
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#ifdef __ARMCC__
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#undef _STLP_TEMPLATE_NULL
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#define _STLP_TEMPLATE_NULL 
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#endif
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_STLP_BEGIN_NAMESPACE
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// Absolute value
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#ifdef __SYMBIAN32__
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float abs_l(const complex<float>& __z)
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{
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  return _STLP_HYPOTF(__z._M_re, __z._M_im);
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}
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double _STLP_CALL abs_l(const complex<double>& __z)
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{
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  return _STLP_HYPOT(__z._M_re, __z._M_im);
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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long double _STLP_CALL abs_l(const complex<long double>& __z)
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{
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  return _STLP_HYPOTL(__z._M_re, __z._M_im);
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}
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#endif
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#else
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC float _STLP_CALL abs(const complex<float>& __z)
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{
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  return _STLP_HYPOTF(__z._M_re, __z._M_im);
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}
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC double _STLP_CALL abs(const complex<double>& __z)
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{
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  return _STLP_HYPOT(__z._M_re, __z._M_im);
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC long double _STLP_CALL abs(const complex<long double>& __z)
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{
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  return _STLP_HYPOTL(__z._M_re, __z._M_im);
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}
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#endif
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#endif
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// Phase
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#ifdef __SYMBIAN32__
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float _STLP_CALL arg_l(const complex<float>& __z) 
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{
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  return _STLP_ATAN2F(__z._M_im, __z._M_re);
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}
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double _STLP_CALL arg_l(const complex<double>& __z) 
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{
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  return _STLP_ATAN2(__z._M_im, __z._M_re);
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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long double _STLP_CALL arg_l(const complex<long double>& __z) 
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{
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  return _STLP_ATAN2L(__z._M_im, __z._M_re);
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}
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#endif
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#else
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_STLP_TEMPLATE_NULL 
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_STLP_EXP_DECLSPEC float _STLP_CALL arg(const complex<float>& __z) 
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{
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  return _STLP_ATAN2F(__z._M_im, __z._M_re);
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}
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_STLP_TEMPLATE_NULL 
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_STLP_EXP_DECLSPEC double _STLP_CALL arg(const complex<double>& __z) 
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{
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  return _STLP_ATAN2(__z._M_im, __z._M_re);
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC long double _STLP_CALL arg(const complex<long double>& __z) 
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{
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  return _STLP_ATAN2L(__z._M_im, __z._M_re);
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}
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#endif
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#endif
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// Construct a complex number from polar representation
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#ifdef __SYMBIAN32__
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complex<float> _STLP_CALL polar_l(const float& __rho, const float& __phi) 
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{
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  return complex<float>(__rho * _STLP_COSF(__phi), __rho * _STLP_SINF(__phi));
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}
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complex<double> _STLP_CALL polar_l(const double& __rho, const double& __phi) 
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{
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  return complex<double>(__rho * _STLP_COS(__phi), __rho * _STLP_SIN(__phi));
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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complex<long double> _STLP_CALL polar_l(const long double& __rho, const long double& __phi)
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{
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  return complex<long double>(__rho * _STLP_COSL(__phi), __rho * _STLP_SINL(__phi));
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}
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#endif
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#else
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC complex<float> _STLP_CALL polar(const float& __rho, const float& __phi) 
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{
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  return complex<float>(__rho * _STLP_COSF(__phi), __rho * _STLP_SINF(__phi));
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}
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_STLP_TEMPLATE_NULL
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_STLP_EXP_DECLSPEC complex<double> _STLP_CALL polar(const double& __rho, const double& __phi) 
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{
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  return complex<double>(__rho * _STLP_COS(__phi), __rho * _STLP_SIN(__phi));
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}
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   143
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#ifndef _STLP_NO_LONG_DOUBLE
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_STLP_TEMPLATE_NULL 
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_STLP_EXP_DECLSPEC complex<long double> _STLP_CALL polar(const long double& __rho, const long double& __phi)
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{
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  return complex<long double>(__rho * _STLP_COSL(__phi), __rho * _STLP_SINL(__phi));
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}
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#endif
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#endif
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// Division
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void  _STLP_EXP_DECLSPEC
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complex<float>::_div(const float& __z1_r, const float& __z1_i,
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		     const float& __z2_r, const float& __z2_i,
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		     float& __res_r, float& __res_i) {
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  float __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  float __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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   161
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  if (__ar <= __ai) {
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    float __ratio = __z2_r / __z2_i;
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    float __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio + __z1_i) / __denom;
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    __res_i = (__z1_i * __ratio - __z1_r) / __denom;
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  }
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  else {
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    float __ratio = __z2_i / __z2_r;
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    float __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = (__z1_r + __z1_i * __ratio) / __denom;
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    __res_i = (__z1_i - __z1_r * __ratio) / __denom;
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  }
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}
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   175
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void  _STLP_EXP_DECLSPEC
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complex<float>::_div(const float& __z1_r,
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                     const float& __z2_r, const float& __z2_i,
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                     float& __res_r, float& __res_i) {
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  float __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  float __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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  if (__ar <= __ai) {
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    float __ratio = __z2_r / __z2_i;
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    float __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio) / __denom;
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    __res_i = - __z1_r / __denom;
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  }
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  else {
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    float __ratio = __z2_i / __z2_r;
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    float __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = __z1_r / __denom;
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    __res_i = - (__z1_r * __ratio) / __denom;
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  }
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}
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   196
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   197
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void  _STLP_EXP_DECLSPEC
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complex<double>::_div(const double& __z1_r, const double& __z1_i,
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                      const double& __z2_r, const double& __z2_i,
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                      double& __res_r, double& __res_i) {
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  double __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  double __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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   204
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  if (__ar <= __ai) {
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    double __ratio = __z2_r / __z2_i;
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    double __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio + __z1_i) / __denom;
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    __res_i = (__z1_i * __ratio - __z1_r) / __denom;
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  }
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  else {
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    double __ratio = __z2_i / __z2_r;
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    double __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = (__z1_r + __z1_i * __ratio) / __denom;
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    __res_i = (__z1_i - __z1_r * __ratio) / __denom;
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  }
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}
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   218
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void _STLP_EXP_DECLSPEC
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complex<double>::_div(const double& __z1_r,
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                      const double& __z2_r, const double& __z2_i,
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                      double& __res_r, double& __res_i) {
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  double __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  double __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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  if (__ar <= __ai) {
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    double __ratio = __z2_r / __z2_i;
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    double __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio) / __denom;
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    __res_i = - __z1_r / __denom;
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  }
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  else {
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    double __ratio = __z2_i / __z2_r;
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    double __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = __z1_r / __denom;
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    __res_i = - (__z1_r * __ratio) / __denom;
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  }
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}
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#ifndef _STLP_NO_LONG_DOUBLE
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void  _STLP_CALL
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complex<long double>::_div(const long double& __z1_r, const long double& __z1_i,
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                           const long double& __z2_r, const long double& __z2_i,
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                           long double& __res_r, long double& __res_i) {
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  long double __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  long double __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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  if (__ar <= __ai) {
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    long double __ratio = __z2_r / __z2_i;
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    long double __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio + __z1_i) / __denom;
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    __res_i = (__z1_i * __ratio - __z1_r) / __denom;
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  }
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  else {
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    long double __ratio = __z2_i / __z2_r;
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    long double __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = (__z1_r + __z1_i * __ratio) / __denom;
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    __res_i = (__z1_i - __z1_r * __ratio) / __denom;
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  }
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}
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   262
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void _STLP_CALL
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complex<long double>::_div(const long double& __z1_r,
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                           const long double& __z2_r, const long double& __z2_i,
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                           long double& __res_r, long double& __res_i) {
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   267
  long double __ar = __z2_r >= 0 ? __z2_r : -__z2_r;
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  long double __ai = __z2_i >= 0 ? __z2_i : -__z2_i;
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   269
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  if (__ar <= __ai) {
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    long double __ratio = __z2_r / __z2_i;
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    long double __denom = __z2_i * (1 + __ratio * __ratio);
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    __res_r = (__z1_r * __ratio) / __denom;
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    __res_i = - __z1_r / __denom;
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  }
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  else {
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    long double __ratio = __z2_i / __z2_r;
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    long double __denom = __z2_r * (1 + __ratio * __ratio);
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    __res_r = __z1_r / __denom;
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    __res_i = - (__z1_r * __ratio) / __denom;
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  }
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}
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#endif
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//----------------------------------------------------------------------
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// Square root
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   287
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   288
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_STLP_EXP_DECLSPEC complex<float> _STLP_CALL
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sqrt(const complex<float>& z) {
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   291
  float re = z._M_re;
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  float im = z._M_im;
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   293
  float mag = _STLP_HYPOTF(re, im);
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   294
  complex<float> result;
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   295
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   296
  if (mag == 0.) {
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   297
    result._M_re = result._M_im = 0.f;
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   298
  } else if (re > 0.f) {
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   299
    result._M_re = _STLP_SQRTF(0.5f * (mag + re));
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   300
    result._M_im = im/result._M_re/2.f;
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   301
  } else {
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   302
    result._M_im = _STLP_SQRTF(0.5f * (mag - re));
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   303
    if (im < 0.f)
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   304
      result._M_im = - result._M_im;
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   305
    result._M_re = im/result._M_im/2.f;
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   306
  }
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   307
  return result;
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   308
}
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   309
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   310
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   311
_STLP_EXP_DECLSPEC complex<double>  _STLP_CALL
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sqrt(const complex<double>& z) {
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   313
  double re = z._M_re;
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   314
  double im = z._M_im;
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   315
  double mag = _STLP_HYPOT(re, im);
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   316
  complex<double> result;
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   317
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   318
  if (mag == 0.) {
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   319
    result._M_re = result._M_im = 0.;
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   320
  } else if (re > 0.) {
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parents:
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   321
    result._M_re = _STLP_SQRT(0.5 * (mag + re));
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   322
    result._M_im = im/result._M_re/2;
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   323
  } else {
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   324
    result._M_im = _STLP_SQRT(0.5 * (mag - re));
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parents:
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   325
    if (im < 0.)
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   326
      result._M_im = - result._M_im;
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   327
    result._M_re = im/result._M_im/2;
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   328
  }
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   329
  return result;
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   330
}
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   331
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#ifndef _STLP_NO_LONG_DOUBLE
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_STLP_EXP_DECLSPEC complex<long double> _STLP_CALL
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sqrt(const complex<long double>& z) {
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  long double re = z._M_re;
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  long double im = z._M_im;
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  long double mag = _STLP_HYPOTL(re, im);
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  complex<long double> result;
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   339
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  if (mag == 0.L) {
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    result._M_re = result._M_im = 0.L;
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  } else if (re > 0.L) {
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    result._M_re = _STLP_SQRTL(0.5L * (mag + re));
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    result._M_im = (im/result._M_re) * .5L;
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  } else {
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    result._M_im = _STLP_SQRTL(0.5L * (mag - re));
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    if (im < 0.L)
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      result._M_im = - result._M_im;
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    result._M_re = (im/result._M_im) * .5L;
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  }
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  return result;
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}
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#endif
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   354
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#ifdef __SYMBIAN32__
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template <class _Tp>
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_STLP_EXP_DECLSPEC _Tp  _STLP_CALL abs_tp(const complex<_Tp>& val)
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    {
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    return abs_l(val);
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    }
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   361
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   362
template <class _Tp>
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_STLP_EXP_DECLSPEC _Tp  _STLP_CALL arg_tp(const complex<_Tp>& val)
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   364
    {
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   365
    return arg_l(val);
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    }
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   367
    
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   368
template <class _Tp>
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   369
_STLP_EXP_DECLSPEC complex<_Tp> _STLP_CALL polar_tp(const _Tp& __rho, const _Tp& __phi)
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    {
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    return polar_l(__rho, __phi);
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    }
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   373
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   374
 
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   375
void dummy_instantiate_func()
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{
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    const complex<float> val;
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    float fval;
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   379
    abs_tp(val);
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   380
    arg_tp(val);
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   381
    polar_tp(fval, fval);
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    const complex<double> dval;
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    double dv;
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    abs_tp(dval);
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   385
    arg_tp(dval);
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   386
    polar_tp(dv, dv);
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   387
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   388
#ifndef _STLP_NO_LONG_DOUBLE
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   389
    const complex<long double> lval;
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   390
    long double lv;
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   391
    abs_tp(lval);
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   392
    arg_tp(lval);
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   393
    polar_tp(lv, lv);
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   394
#endif
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   395
}
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   396
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   397
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   398
#endif
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   399
//template <>
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   400
//_STLP_EXP_DECLSPEC float  _STLP_CALL abs_tp(const complex<float>& val);
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   401
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   402
_STLP_END_NAMESPACE
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   403
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   404
#ifdef __ARMCC__
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   405
#undef _STLP_TEMPLATE_NULL
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   406
#endif