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254 lines
7.8 KiB
C
254 lines
7.8 KiB
C
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1997
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* Moscow Center for SPARC Technology
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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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/* NOTE: This is an internal header file, included by other STL headers.
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* You should not attempt to use it directly.
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*/
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#if !defined (_STLP_INTERNAL_STREAM_ITERATOR_H) && !defined (_STLP_USE_NO_IOSTREAMS)
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#define _STLP_INTERNAL_STREAM_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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// streambuf_iterators predeclarations must appear first
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#ifndef _STLP_INTERNAL_IOSFWD
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# include <stl/_iosfwd.h>
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#endif
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#ifndef _STLP_INTERNAL_ALGOBASE_H
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# include <stl/_algobase.h>
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#endif
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#ifndef _STLP_INTERNAL_OSTREAMBUF_ITERATOR_H
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# include <stl/_ostreambuf_iterator.h>
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#endif
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#ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
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# include <stl/_istreambuf_iterator.h>
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#endif
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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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// istream_iterator and ostream_iterator look very different if we're
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// using new, templatized iostreams than if we're using the old cfront
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// version.
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_STLP_BEGIN_NAMESPACE
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#if !defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
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# define __ISI_TMPL_HEADER_ARGUMENTS class _Tp, class _CharT, class _Traits, class _Dist
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# define __ISI_TMPL_ARGUMENTS _Tp, _CharT, _Traits, _Dist
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template <class _Tp,
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class _CharT = char, class _Traits = char_traits<_CharT>,
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class _Dist = ptrdiff_t>
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class istream_iterator : public iterator<input_iterator_tag, _Tp , _Dist,
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const _Tp*, const _Tp& > {
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#else
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# if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
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# define __ISI_TMPL_HEADER_ARGUMENTS class _Tp
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# define __ISI_TMPL_ARGUMENTS _Tp
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template <class _Tp>
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class istream_iterator : public iterator<input_iterator_tag, _Tp , ptrdiff_t,
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const _Tp*, const _Tp& > {
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# else
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# define __ISI_TMPL_HEADER_ARGUMENTS class _Tp, class _Dist
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# define __ISI_TMPL_ARGUMENTS _Tp, _Dist
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template <class _Tp, _STLP_DFL_TYPE_PARAM(_Dist, ptrdiff_t)>
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class istream_iterator : public iterator<input_iterator_tag, _Tp, _Dist ,
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const _Tp*, const _Tp& > {
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# endif /* _STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS */
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#endif /* _STLP_LIMITED_DEFAULT_TEMPLATES */
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#if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
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typedef char _CharT;
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typedef char_traits<char> _Traits;
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# if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
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typedef ptrdiff_t _Dist;
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# endif
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#endif
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typedef istream_iterator< __ISI_TMPL_ARGUMENTS > _Self;
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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 basic_istream<_CharT, _Traits> istream_type;
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typedef input_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Dist difference_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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istream_iterator() : _M_stream(0), _M_ok(false), _M_read_done(true) {}
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istream_iterator(istream_type& __s) : _M_stream(&__s), _M_ok(false), _M_read_done(false) {}
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reference operator*() const {
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if (!_M_read_done) {
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_M_read();
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}
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return _M_value;
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}
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_STLP_DEFINE_ARROW_OPERATOR
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_Self& operator++() {
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_M_read();
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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_M_read();
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return __tmp;
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}
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bool _M_equal(const _Self& __x) const {
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if (!_M_read_done) {
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_M_read();
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}
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if (!__x._M_read_done) {
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__x._M_read();
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}
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return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream);
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}
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private:
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istream_type* _M_stream;
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mutable _Tp _M_value;
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mutable bool _M_ok;
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mutable bool _M_read_done;
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void _M_read() const {
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_STLP_MUTABLE(_Self, _M_ok) = ((_M_stream != 0) && !_M_stream->fail());
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if (_M_ok) {
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*_M_stream >> _STLP_MUTABLE(_Self, _M_value);
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_STLP_MUTABLE(_Self, _M_ok) = !_M_stream->fail();
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}
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_STLP_MUTABLE(_Self, _M_read_done) = true;
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}
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};
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#if !defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
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template <class _TpP,
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class _CharT = char, class _Traits = char_traits<_CharT> >
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#else
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template <class _TpP>
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#endif
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class ostream_iterator: public iterator<output_iterator_tag, void, void, void, void> {
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#if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
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typedef char _CharT;
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typedef char_traits<char> _Traits;
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typedef ostream_iterator<_TpP> _Self;
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#else
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typedef ostream_iterator<_TpP, _CharT, _Traits> _Self;
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#endif
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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 basic_ostream<_CharT, _Traits> ostream_type;
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typedef output_iterator_tag iterator_category;
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ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
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ostream_iterator(ostream_type& __s, const _CharT* __c)
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: _M_stream(&__s), _M_string(__c) {}
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_Self& operator=(const _TpP& __val) {
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*_M_stream << __val;
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if (_M_string) *_M_stream << _M_string;
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return *this;
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}
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_Self& operator*() { return *this; }
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_Self& operator++() { return *this; }
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_Self& operator++(int) { return *this; }
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private:
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ostream_type* _M_stream;
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const _CharT* _M_string;
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};
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#if defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
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# if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
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template <class _TpP>
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inline output_iterator_tag _STLP_CALL
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iterator_category(const ostream_iterator<_TpP>&) { return output_iterator_tag(); }
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# else
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template <class _TpP, class _CharT, class _Traits>
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inline output_iterator_tag _STLP_CALL
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iterator_category(const ostream_iterator<_TpP, _CharT, _Traits>&) { return output_iterator_tag(); }
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# endif
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#endif
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_STLP_END_NAMESPACE
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// form-independent definiotion of stream iterators
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_STLP_BEGIN_NAMESPACE
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline bool _STLP_CALL
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operator==(const istream_iterator< __ISI_TMPL_ARGUMENTS >& __x,
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const istream_iterator< __ISI_TMPL_ARGUMENTS >& __y)
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{ return __x._M_equal(__y); }
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#if defined (_STLP_USE_SEPARATE_RELOPS_NAMESPACE)
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline bool _STLP_CALL
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operator!=(const istream_iterator< __ISI_TMPL_ARGUMENTS >& __x,
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const istream_iterator< __ISI_TMPL_ARGUMENTS >& __y)
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{ return !__x._M_equal(__y); }
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#endif
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#if defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline input_iterator_tag _STLP_CALL
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iterator_category(const istream_iterator< __ISI_TMPL_ARGUMENTS >&)
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{ return input_iterator_tag(); }
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline _Tp* _STLP_CALL
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value_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (_Tp*) 0; }
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# if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline ptrdiff_t* _STLP_CALL
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distance_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (ptrdiff_t*)0; }
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# else
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template < __ISI_TMPL_HEADER_ARGUMENTS >
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inline _Dist* _STLP_CALL
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distance_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (_Dist*)0; }
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# endif /* _STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS */
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#endif
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_STLP_END_NAMESPACE
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#undef __ISI_TMPL_HEADER_ARGUMENTS
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#undef __ISI_TMPL_ARGUMENTS
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#endif /* _STLP_INTERNAL_STREAM_ITERATOR_H */
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// Local Variables:
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// mode:C++
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// End:
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