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downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 198 insertions, 0 deletions

diff --git a/libstdc++-v3/include/parallel/iterator.h b/libstdc++-v3/include/parallel/iterator.h
new file mode 100644
index 000000000..013855076
--- /dev/null
+++ b/libstdc++-v3/include/parallel/iterator.h
@@ -0,0 +1,198 @@
+// -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009 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 parallel/iterator.h
+ * @brief Helper iterator classes for the std::transform() functions.
+ *  This file is a GNU parallel extension to the Standard C++ Library.
+ */
+
+// Written by Johannes Singler.
+
+#ifndef _GLIBCXX_PARALLEL_ITERATOR_H
+#define _GLIBCXX_PARALLEL_ITERATOR_H 1
+
+#include <parallel/basic_iterator.h>
+#include <bits/stl_pair.h>
+
+namespace __gnu_parallel
+{
+  /** @brief A pair of iterators. The usual iterator operations are
+   *  applied to both child iterators.
+   */
+  template<typename _Iterator1, typename _Iterator2,
+           typename _IteratorCategory>
+    class _IteratorPair : public std::pair<_Iterator1, _Iterator2>
+    {
+    private:
+      typedef std::pair<_Iterator1, _Iterator2> _Base;
+
+    public:
+      typedef _IteratorCategory iterator_category;
+      typedef void value_type;
+
+      typedef std::iterator_traits<_Iterator1> _TraitsType;
+      typedef typename _TraitsType::difference_type difference_type;
+      typedef _IteratorPair* pointer;
+      typedef _IteratorPair& reference;
+
+      _IteratorPair() { }
+
+      _IteratorPair(const _Iterator1& __first, const _Iterator2& __second)
+      : _Base(__first, __second) { }
+
+      // Pre-increment operator.
+      _IteratorPair&
+      operator++()
+      {
+        ++_Base::first;
+        ++_Base::second;
+        return *this;
+      }
+
+      // Post-increment operator.
+      const _IteratorPair
+      operator++(int)
+      { return _IteratorPair(_Base::first++, _Base::second++); }
+
+      // Pre-decrement operator.
+      _IteratorPair&
+      operator--()
+      {
+        --_Base::first;
+        --_Base::second;
+        return *this;
+      }
+
+      // Post-decrement operator.
+      const _IteratorPair
+      operator--(int)
+      { return _IteratorPair(_Base::first--, _Base::second--); }
+
+      // Type conversion.
+      operator _Iterator2() const
+      { return _Base::second; }
+
+      _IteratorPair&
+      operator=(const _IteratorPair& __other)
+      {
+        _Base::first = __other.first;
+        _Base::second = __other.second;
+        return *this;
+      }
+
+      _IteratorPair
+      operator+(difference_type __delta) const
+      { return _IteratorPair(_Base::first + __delta, _Base::second + __delta);
+        }
+
+      difference_type
+      operator-(const _IteratorPair& __other) const
+      { return _Base::first - __other.first; }
+  };
+
+
+  /** @brief A triple of iterators. The usual iterator operations are
+      applied to all three child iterators.
+   */
+  template<typename _Iterator1, typename _Iterator2, typename _Iterator3,
+           typename _IteratorCategory>
+    class _IteratorTriple
+    {
+    public:
+      typedef _IteratorCategory iterator_category;
+      typedef void value_type;
+      typedef typename std::iterator_traits<_Iterator1>::difference_type
+                                                            difference_type;
+      typedef _IteratorTriple* pointer;
+      typedef _IteratorTriple& reference;
+
+      _Iterator1 _M_first;
+      _Iterator2 _M_second;
+      _Iterator3 _M_third;
+
+      _IteratorTriple() { }
+
+      _IteratorTriple(const _Iterator1& __first, const _Iterator2& __second,
+                      const _Iterator3& __third)
+      {
+        _M_first = __first;
+        _M_second = __second;
+        _M_third = __third;
+      }
+
+      // Pre-increment operator.
+      _IteratorTriple&
+      operator++()
+      {
+        ++_M_first;
+        ++_M_second;
+        ++_M_third;
+        return *this;
+      }
+
+      // Post-increment operator.
+      const _IteratorTriple
+      operator++(int)
+      { return _IteratorTriple(_M_first++, _M_second++, _M_third++); }
+
+      // Pre-decrement operator.
+      _IteratorTriple&
+      operator--()
+      {
+        --_M_first;
+        --_M_second;
+        --_M_third;
+        return *this;
+      }
+
+      // Post-decrement operator.
+      const _IteratorTriple
+      operator--(int)
+      { return _IteratorTriple(_M_first--, _M_second--, _M_third--); }
+
+      // Type conversion.
+      operator _Iterator3() const
+      { return _M_third; }
+
+      _IteratorTriple&
+      operator=(const _IteratorTriple& __other)
+      {
+        _M_first = __other._M_first;
+        _M_second = __other._M_second;
+        _M_third = __other._M_third;
+        return *this;
+      }
+
+      _IteratorTriple
+      operator+(difference_type __delta) const
+      { return _IteratorTriple(_M_first + __delta, _M_second + __delta,
+                               _M_third + __delta); }
+
+      difference_type
+      operator-(const _IteratorTriple& __other) const
+      { return _M_first - __other._M_first; }
+  };
+}
+
+#endif /* _GLIBCXX_PARALLEL_ITERATOR_H */