--- /dev/null
+// Streambuf iterators
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2009, 2010, 2011
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/streambuf_iterator.h
+ * This is an internal header file, included by other library headers.
+ * Do not attempt to use it directly. @headername{iterator}
+ */
+
+#ifndef _STREAMBUF_ITERATOR_H
+#define _STREAMBUF_ITERATOR_H 1
+
+#pragma GCC system_header
+
+#include <streambuf>
+#include <debug/debug.h>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @addtogroup iterators
+ * @{
+ */
+
+ // 24.5.3 Template class istreambuf_iterator
+ /// Provides input iterator semantics for streambufs.
+ template<typename _CharT, typename _Traits>
+ class istreambuf_iterator
+ : public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
+ _CharT*,
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ // LWG 445.
+ _CharT>
+#else
+ _CharT&>
+#endif
+ {
+ public:
+ // Types:
+ //@{
+ /// Public typedefs
+ typedef _CharT char_type;
+ typedef _Traits traits_type;
+ typedef typename _Traits::int_type int_type;
+ typedef basic_streambuf<_CharT, _Traits> streambuf_type;
+ typedef basic_istream<_CharT, _Traits> istream_type;
+ //@}
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ ostreambuf_iterator<_CharT2> >::__type
+ copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ ostreambuf_iterator<_CharT2>);
+
+ template<bool _IsMove, typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ _CharT2*>::__type
+ __copy_move_a2(istreambuf_iterator<_CharT2>,
+ istreambuf_iterator<_CharT2>, _CharT2*);
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ istreambuf_iterator<_CharT2> >::__type
+ find(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ const _CharT2&);
+
+ private:
+ // 24.5.3 istreambuf_iterator
+ // p 1
+ // If the end of stream is reached (streambuf_type::sgetc()
+ // returns traits_type::eof()), the iterator becomes equal to
+ // the "end of stream" iterator value.
+ // NB: This implementation assumes the "end of stream" value
+ // is EOF, or -1.
+ mutable streambuf_type* _M_sbuf;
+ mutable int_type _M_c;
+
+ public:
+ /// Construct end of input stream iterator.
+ _GLIBCXX_CONSTEXPR istreambuf_iterator() _GLIBCXX_USE_NOEXCEPT
+ : _M_sbuf(0), _M_c(traits_type::eof()) { }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ istreambuf_iterator(const istreambuf_iterator&) noexcept = default;
+
+ ~istreambuf_iterator() = default;
+#endif
+
+ /// Construct start of input stream iterator.
+ istreambuf_iterator(istream_type& __s) _GLIBCXX_USE_NOEXCEPT
+ : _M_sbuf(__s.rdbuf()), _M_c(traits_type::eof()) { }
+
+ /// Construct start of streambuf iterator.
+ istreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
+ : _M_sbuf(__s), _M_c(traits_type::eof()) { }
+
+ /// Return the current character pointed to by iterator. This returns
+ /// streambuf.sgetc(). It cannot be assigned. NB: The result of
+ /// operator*() on an end of stream is undefined.
+ char_type
+ operator*() const
+ {
+#ifdef _GLIBCXX_DEBUG_PEDANTIC
+ // Dereferencing a past-the-end istreambuf_iterator is a
+ // libstdc++ extension
+ __glibcxx_requires_cond(!_M_at_eof(),
+ _M_message(__gnu_debug::__msg_deref_istreambuf)
+ ._M_iterator(*this));
+#endif
+ return traits_type::to_char_type(_M_get());
+ }
+
+ /// Advance the iterator. Calls streambuf.sbumpc().
+ istreambuf_iterator&
+ operator++()
+ {
+ __glibcxx_requires_cond(!_M_at_eof(),
+ _M_message(__gnu_debug::__msg_inc_istreambuf)
+ ._M_iterator(*this));
+ if (_M_sbuf)
+ {
+ _M_sbuf->sbumpc();
+ _M_c = traits_type::eof();
+ }
+ return *this;
+ }
+
+ /// Advance the iterator. Calls streambuf.sbumpc().
+ istreambuf_iterator
+ operator++(int)
+ {
+ __glibcxx_requires_cond(!_M_at_eof(),
+ _M_message(__gnu_debug::__msg_inc_istreambuf)
+ ._M_iterator(*this));
+
+ istreambuf_iterator __old = *this;
+ if (_M_sbuf)
+ {
+ __old._M_c = _M_sbuf->sbumpc();
+ _M_c = traits_type::eof();
+ }
+ return __old;
+ }
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 110 istreambuf_iterator::equal not const
+ // NB: there is also number 111 (NAD, Future) pending on this function.
+ /// Return true both iterators are end or both are not end.
+ bool
+ equal(const istreambuf_iterator& __b) const
+ { return _M_at_eof() == __b._M_at_eof(); }
+
+ private:
+ int_type
+ _M_get() const
+ {
+ const int_type __eof = traits_type::eof();
+ int_type __ret = __eof;
+ if (_M_sbuf)
+ {
+ if (!traits_type::eq_int_type(_M_c, __eof))
+ __ret = _M_c;
+ else if (!traits_type::eq_int_type((__ret = _M_sbuf->sgetc()),
+ __eof))
+ _M_c = __ret;
+ else
+ _M_sbuf = 0;
+ }
+ return __ret;
+ }
+
+ bool
+ _M_at_eof() const
+ {
+ const int_type __eof = traits_type::eof();
+ return traits_type::eq_int_type(_M_get(), __eof);
+ }
+ };
+
+ template<typename _CharT, typename _Traits>
+ inline bool
+ operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
+ const istreambuf_iterator<_CharT, _Traits>& __b)
+ { return __a.equal(__b); }
+
+ template<typename _CharT, typename _Traits>
+ inline bool
+ operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
+ const istreambuf_iterator<_CharT, _Traits>& __b)
+ { return !__a.equal(__b); }
+
+ /// Provides output iterator semantics for streambufs.
+ template<typename _CharT, typename _Traits>
+ class ostreambuf_iterator
+ : public iterator<output_iterator_tag, void, void, void, void>
+ {
+ public:
+ // Types:
+ //@{
+ /// Public typedefs
+ typedef _CharT char_type;
+ typedef _Traits traits_type;
+ typedef basic_streambuf<_CharT, _Traits> streambuf_type;
+ typedef basic_ostream<_CharT, _Traits> ostream_type;
+ //@}
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ ostreambuf_iterator<_CharT2> >::__type
+ copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ ostreambuf_iterator<_CharT2>);
+
+ private:
+ streambuf_type* _M_sbuf;
+ bool _M_failed;
+
+ public:
+ /// Construct output iterator from ostream.
+ ostreambuf_iterator(ostream_type& __s) _GLIBCXX_USE_NOEXCEPT
+ : _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }
+
+ /// Construct output iterator from streambuf.
+ ostreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
+ : _M_sbuf(__s), _M_failed(!_M_sbuf) { }
+
+ /// Write character to streambuf. Calls streambuf.sputc().
+ ostreambuf_iterator&
+ operator=(_CharT __c)
+ {
+ if (!_M_failed &&
+ _Traits::eq_int_type(_M_sbuf->sputc(__c), _Traits::eof()))
+ _M_failed = true;
+ return *this;
+ }
+
+ /// Return *this.
+ ostreambuf_iterator&
+ operator*()
+ { return *this; }
+
+ /// Return *this.
+ ostreambuf_iterator&
+ operator++(int)
+ { return *this; }
+
+ /// Return *this.
+ ostreambuf_iterator&
+ operator++()
+ { return *this; }
+
+ /// Return true if previous operator=() failed.
+ bool
+ failed() const _GLIBCXX_USE_NOEXCEPT
+ { return _M_failed; }
+
+ ostreambuf_iterator&
+ _M_put(const _CharT* __ws, streamsize __len)
+ {
+ if (__builtin_expect(!_M_failed, true)
+ && __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len,
+ false))
+ _M_failed = true;
+ return *this;
+ }
+ };
+
+ // Overloads for streambuf iterators.
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ copy(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ if (__first._M_sbuf && !__last._M_sbuf && !__result._M_failed)
+ {
+ bool __ineof;
+ __copy_streambufs_eof(__first._M_sbuf, __result._M_sbuf, __ineof);
+ if (!__ineof)
+ __result._M_failed = true;
+ }
+ return __result;
+ }
+
+ template<bool _IsMove, typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ __copy_move_a2(_CharT* __first, _CharT* __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ const streamsize __num = __last - __first;
+ if (__num > 0)
+ __result._M_put(__first, __num);
+ return __result;
+ }
+
+ template<bool _IsMove, typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ __copy_move_a2(const _CharT* __first, const _CharT* __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ const streamsize __num = __last - __first;
+ if (__num > 0)
+ __result._M_put(__first, __num);
+ return __result;
+ }
+
+ template<bool _IsMove, typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ _CharT*>::__type
+ __copy_move_a2(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last, _CharT* __result)
+ {
+ typedef istreambuf_iterator<_CharT> __is_iterator_type;
+ typedef typename __is_iterator_type::traits_type traits_type;
+ typedef typename __is_iterator_type::streambuf_type streambuf_type;
+ typedef typename traits_type::int_type int_type;
+
+ if (__first._M_sbuf && !__last._M_sbuf)
+ {
+ streambuf_type* __sb = __first._M_sbuf;
+ int_type __c = __sb->sgetc();
+ while (!traits_type::eq_int_type(__c, traits_type::eof()))
+ {
+ const streamsize __n = __sb->egptr() - __sb->gptr();
+ if (__n > 1)
+ {
+ traits_type::copy(__result, __sb->gptr(), __n);
+ __sb->__safe_gbump(__n);
+ __result += __n;
+ __c = __sb->underflow();
+ }
+ else
+ {
+ *__result++ = traits_type::to_char_type(__c);
+ __c = __sb->snextc();
+ }
+ }
+ }
+ return __result;
+ }
+
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ istreambuf_iterator<_CharT> >::__type
+ find(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last, const _CharT& __val)
+ {
+ typedef istreambuf_iterator<_CharT> __is_iterator_type;
+ typedef typename __is_iterator_type::traits_type traits_type;
+ typedef typename __is_iterator_type::streambuf_type streambuf_type;
+ typedef typename traits_type::int_type int_type;
+
+ if (__first._M_sbuf && !__last._M_sbuf)
+ {
+ const int_type __ival = traits_type::to_int_type(__val);
+ streambuf_type* __sb = __first._M_sbuf;
+ int_type __c = __sb->sgetc();
+ while (!traits_type::eq_int_type(__c, traits_type::eof())
+ && !traits_type::eq_int_type(__c, __ival))
+ {
+ streamsize __n = __sb->egptr() - __sb->gptr();
+ if (__n > 1)
+ {
+ const _CharT* __p = traits_type::find(__sb->gptr(),
+ __n, __val);
+ if (__p)
+ __n = __p - __sb->gptr();
+ __sb->__safe_gbump(__n);
+ __c = __sb->sgetc();
+ }
+ else
+ __c = __sb->snextc();
+ }
+
+ if (!traits_type::eq_int_type(__c, traits_type::eof()))
+ __first._M_c = __c;
+ else
+ __first._M_sbuf = 0;
+ }
+ return __first;
+ }
+
+// @} group iterators
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif
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