author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 19 Aug 2010 11:33:45 +0300 | |
branch | RCL_3 |
changeset 54 | 4332f0f7be53 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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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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#ifndef _STLP_COMPLEX_C |
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#define _STLP_COMPLEX_C |
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|
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#ifndef _STLP_INTERNAL_COMPLEX |
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# include <stl/_complex.h> |
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#endif |
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#if !defined (_STLP_USE_NO_IOSTREAMS) |
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# ifndef _STLP_INTERNAL_ISTREAM |
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# include <stl/_istream.h> |
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# endif |
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|
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# ifndef _STLP_INTERNAL_SSTREAM |
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# include <stl/_sstream.h> |
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# endif |
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|
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# ifndef _STLP_STRING_IO_H |
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# include <stl/_string_io.h> |
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# endif |
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#endif |
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_STLP_BEGIN_NAMESPACE |
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// Non-inline member functions. |
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template <class _Tp> |
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void complex<_Tp>::_div(const _Tp& __z1_r, const _Tp& __z1_i, |
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const _Tp& __z2_r, const _Tp& __z2_i, |
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_Tp& __res_r, _Tp& __res_i) { |
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_Tp __ar = __z2_r >= 0 ? __z2_r : -__z2_r; |
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_Tp __ai = __z2_i >= 0 ? __z2_i : -__z2_i; |
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|
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if (__ar <= __ai) { |
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_Tp __ratio = __z2_r / __z2_i; |
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_Tp __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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_Tp __ratio = __z2_i / __z2_r; |
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_Tp __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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template <class _Tp> |
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void complex<_Tp>::_div(const _Tp& __z1_r, |
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const _Tp& __z2_r, const _Tp& __z2_i, |
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_Tp& __res_r, _Tp& __res_i) { |
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_Tp __ar = __z2_r >= 0 ? __z2_r : -__z2_r; |
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_Tp __ai = __z2_i >= 0 ? __z2_i : -__z2_i; |
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|
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if (__ar <= __ai) { |
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_Tp __ratio = __z2_r / __z2_i; |
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_Tp __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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_Tp __ratio = __z2_i / __z2_r; |
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_Tp __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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// I/O. |
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#if !defined (_STLP_USE_NO_IOSTREAMS) |
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// Complex output, in the form (re,im). We use a two-step process |
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// involving stringstream so that we get the padding right. |
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template <class _Tp, class _CharT, class _Traits> |
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basic_ostream<_CharT, _Traits>& _STLP_CALL |
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operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __z) { |
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basic_ostringstream<_CharT, _Traits, allocator<_CharT> > __tmp; |
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__tmp.flags(__os.flags()); |
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__tmp.imbue(__os.getloc()); |
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__tmp.precision(__os.precision()); |
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__tmp << '(' << __z.real() << ',' << __z.imag() << ')'; |
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return __os << __tmp.str(); |
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} |
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// Complex input from arbitrary streams. Note that results in some |
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// locales may be confusing, since the decimal character varies with |
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// locale and the separator between real and imaginary parts does not. |
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104 |
|
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template <class _Tp, class _CharT, class _Traits> |
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basic_istream<_CharT, _Traits>& _STLP_CALL |
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operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __z) { |
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_Tp __re = 0; |
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_Tp __im = 0; |
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110 |
|
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// typedef ctype<_CharT> _Ctype; |
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// locale __loc = __is.getloc(); |
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//const _Ctype& __c_type = use_facet<_Ctype>(__loc); |
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const ctype<_CharT>& __c_type = *__STATIC_CAST(const ctype<_CharT>*, __is._M_ctype_facet()); |
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115 |
|
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const char __punct[4] = "(,)"; |
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_CharT __wpunct[3]; |
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__c_type.widen(__punct, __punct + 3, __wpunct); |
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119 |
|
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_CharT __c; |
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121 |
|
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__is >> __c; |
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if (_Traits::eq(__c, __wpunct[0])) { // Left paren |
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__is >> __re >> __c; |
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if (_Traits::eq(__c, __wpunct[1])) // Comma |
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__is >> __im >> __c; |
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if (!_Traits::eq(__c, __wpunct[2])) // Right paren |
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__is.setstate(ios_base::failbit); |
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} |
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else { |
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__is.putback(__c); |
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__is >> __re; |
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} |
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134 |
|
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if (__is) |
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__z = complex<_Tp>(__re, __im); |
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return __is; |
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} |
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139 |
|
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#endif /* _STLP_USE_NO_IOSTREAMS */ |
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141 |
|
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_STLP_END_NAMESPACE |
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143 |
|
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#endif /* _STLP_COMPLEX_C */ |
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|
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// Local Variables: |
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// mode:C++ |
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// End: |