author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 15:26:22 +0300 | |
changeset 34 | 5fae379060a7 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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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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// WARNING: This is an internal header file, included by other C++ |
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// standard library headers. You should not attempt to use this header |
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// file directly. |
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#ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H |
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#define _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H |
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#ifndef _STLP_INTERNAL_ITERATOR_BASE_H |
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# include <stl/_iterator_base.h> |
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#endif |
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#ifndef _STLP_INTERNAL_STREAMBUF |
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# include <stl/_streambuf.h> |
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#endif |
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_STLP_BEGIN_NAMESPACE |
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// defined in _istream.h |
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template <class _CharT, class _Traits> |
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extern basic_streambuf<_CharT, _Traits>* _STLP_CALL _M_get_istreambuf(basic_istream<_CharT, _Traits>& ) ; |
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// We do not read any characters until operator* is called. operator* calls sgetc |
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// unless the iterator is unchanged from the last call in which case a cached value is |
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// used. Calls to operator++ use sbumpc. |
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template<class _CharT, class _Traits> |
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class istreambuf_iterator : |
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public iterator<input_iterator_tag, _CharT, typename _Traits::off_type, _CharT*, _CharT&> |
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{ |
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public: |
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typedef _CharT char_type; |
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typedef _Traits traits_type; |
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typedef typename _Traits::int_type int_type; |
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typedef basic_streambuf<_CharT, _Traits> streambuf_type; |
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typedef basic_istream<_CharT, _Traits> istream_type; |
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typedef input_iterator_tag iterator_category; |
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typedef _CharT value_type; |
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typedef typename _Traits::off_type difference_type; |
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typedef const _CharT* pointer; |
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typedef const _CharT& reference; |
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public: |
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istreambuf_iterator(streambuf_type* __p = 0) { this->_M_init(__p); } |
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// istreambuf_iterator(basic_istream<_CharT, _Traits>& __is) { this->_M_init(_M_get_istreambuf(__is)); } |
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inline istreambuf_iterator(basic_istream<_CharT, _Traits>& __is); |
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char_type operator*() const { this->_M_getc(); return _M_c; } |
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istreambuf_iterator<_CharT, _Traits>& operator++() |
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{ |
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_M_buf->sbumpc(); |
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_M_have_c = false; |
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return *this; |
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} |
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istreambuf_iterator<_CharT, _Traits> operator++(int); |
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bool equal(const istreambuf_iterator<_CharT, _Traits>& __i) const { |
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if (this->_M_buf) |
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this->_M_getc(); |
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if (__i._M_buf) |
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__i._M_getc(); |
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return this->_M_eof == __i._M_eof; |
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} |
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private: |
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void _M_init(streambuf_type* __p) { |
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_M_buf = __p; |
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_M_eof = (__p == 0); |
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_M_have_c = false; |
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} |
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void _M_getc() const { |
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if (_M_have_c) |
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return; |
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int_type __c = _M_buf->sgetc(); |
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# if !defined (_STLP_NEED_MUTABLE) /* && ! defined (__SUNPRO_CC) */ |
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_M_c = traits_type::to_char_type(__c); |
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_M_eof = traits_type::eq_int_type(__c, traits_type::eof()); |
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_M_have_c = true; |
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# else |
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typedef istreambuf_iterator<_CharT,_Traits> _Self; |
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_Self* __that = __CONST_CAST(_Self*, this); |
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__that->_M_c = __STATIC_CAST(_CharT, traits_type::to_char_type(__c)); |
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__that->_M_eof = traits_type::eq_int_type(__c, traits_type::eof()); |
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__that->_M_have_c = true; |
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# endif |
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} |
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private: |
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streambuf_type* _M_buf; |
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mutable _CharT _M_c; |
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mutable bool _M_eof; |
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mutable bool _M_have_c; |
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}; |
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113 |
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template<class _CharT, class _Traits> |
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inline istreambuf_iterator<_CharT, _Traits>::istreambuf_iterator(basic_istream<_CharT, _Traits>& __is) |
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{ this->_M_init(_M_get_istreambuf(__is)); } |
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template<class _CharT, class _Traits> |
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inline bool _STLP_CALL operator==(const istreambuf_iterator<_CharT, _Traits>& __x, |
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const istreambuf_iterator<_CharT, _Traits>& __y) { |
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return __x.equal(__y); |
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} |
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#ifdef _STLP_USE_SEPARATE_RELOPS_NAMESPACE |
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|
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template<class _CharT, class _Traits> |
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inline bool _STLP_CALL operator!=(const istreambuf_iterator<_CharT, _Traits>& __x, |
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const istreambuf_iterator<_CharT, _Traits>& __y) { |
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return !__x.equal(__y); |
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} |
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|
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#endif /* _STLP_USE_SEPARATE_RELOPS_NAMESPACE */ |
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133 |
|
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# if defined (_STLP_USE_TEMPLATE_EXPORT) |
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_STLP_EXPORT_TEMPLATE_CLASS istreambuf_iterator<char, char_traits<char> >; |
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# if defined (INSTANTIATE_WIDE_STREAMS) |
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_STLP_EXPORT_TEMPLATE_CLASS istreambuf_iterator<wchar_t, char_traits<wchar_t> >; |
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# endif |
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# endif /* _STLP_USE_TEMPLATE_EXPORT */ |
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|
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# ifdef _STLP_USE_OLD_HP_ITERATOR_QUERIES |
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template <class _CharT, class _Traits> |
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inline input_iterator_tag _STLP_CALL iterator_category(const istreambuf_iterator<_CharT, _Traits>&) { return input_iterator_tag(); } |
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template <class _CharT, class _Traits> |
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inline streamoff* _STLP_CALL |
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distance_type(const istreambuf_iterator<_CharT, _Traits>&) { return (streamoff*)0; } |
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template <class _CharT, class _Traits> |
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inline _CharT* _STLP_CALL value_type(const istreambuf_iterator<_CharT, _Traits>&) { return (_CharT*)0; } |
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# endif |
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|
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template <class _CharT, class _Traits> |
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istreambuf_iterator<_CharT, _Traits> |
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istreambuf_iterator<_CharT, _Traits>::operator++(int) { |
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_M_getc(); // __tmp should avoid any future actions under |
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// underlined buffer---during call of operator *() |
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// (due to buffer for *this and __tmp are the same). |
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istreambuf_iterator<_CharT, _Traits> __tmp = *this; |
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_M_buf->sbumpc(); |
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_M_have_c = false; |
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return __tmp; |
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} |
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|
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_STLP_END_NAMESPACE |
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|
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#endif /* _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H */ |
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// Local Variables: |
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// mode:C++ |
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// End: |
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170 |