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aeffe1056f
R=mark at https://breakpad.appspot.com/535002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1121 4c0a9323-5329-0410-9bdc-e9ce6186880e
113 lines
4.2 KiB
C++
113 lines
4.2 KiB
C++
// Copyright 2010 Google Inc. All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// static_map_iterator.h: StaticMapIterator template class declaration.
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//
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// StaticMapIterator provides increment and decrement operators to iterate
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// through a StaticMap map. It does not provide *, -> operators, user should
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// use GetKeyPtr(), GetKey(), GetValuePtr() interfaces to retrieve data or
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// pointer to data. StaticMapIterator is essentially a const_iterator.
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//
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// Author: Siyang Xie (lambxsy@google.com)
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#ifndef PROCESSOR_STATIC_MAP_ITERATOR_H__
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#define PROCESSOR_STATIC_MAP_ITERATOR_H__
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#include "google_breakpad/common/breakpad_types.h"
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namespace google_breakpad {
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// Forward declaration.
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template<typename Key, typename Value, typename Compare> class StaticMap;
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// StaticMapIterator does not support operator*() or operator->(),
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// User should use GetKey(), GetKeyPtr(), GetValuePtr() instead;
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template<typename Key, typename Value, typename Compare>
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class StaticMapIterator {
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public:
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// Constructors.
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StaticMapIterator(): index_(-1), base_(NULL) { }
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// Increment & Decrement operators:
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StaticMapIterator& operator++();
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StaticMapIterator operator++(int post_fix_operator);
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StaticMapIterator& operator--();
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StaticMapIterator operator--(int post_fix_operator);
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// Interface for retrieving data / pointer to data.
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const Key* GetKeyPtr() const;
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// Run time error will occur if GetKey() is called on an invalid iterator.
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inline const Key GetKey() const { return *GetKeyPtr(); }
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// return a raw memory pointer that points to the start address of value.
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const char* GetValueRawPtr() const;
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// return a reinterpret-casted pointer to the value.
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inline const Value* GetValuePtr() const {
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return reinterpret_cast<const Value*>(GetValueRawPtr());
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}
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bool operator==(const StaticMapIterator& x) const;
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bool operator!=(const StaticMapIterator& x) const;
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// Check if this iterator is valid.
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// If iterator is invalid, user is forbidden to use ++/-- operator
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// or interfaces for retrieving data / pointer to data.
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bool IsValid() const;
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private:
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friend class StaticMap<Key, Value, Compare>;
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// Only StaticMap can call this constructor.
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explicit StaticMapIterator(const char* base, const int32_t &index);
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// Index of node that the iterator is pointing to.
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int32_t index_;
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// Beginning address of the serialized map data.
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const char* base_;
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// Number of nodes in the map. Use it to identify end() iterator.
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int32_t num_nodes_;
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// offsets_ is an array of offset addresses of mapped values.
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// For example:
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// address_of_i-th_node_value = base_ + offsets_[i]
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const uint32_t* offsets_;
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// keys_[i] = key of i_th node.
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const Key* keys_;
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};
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} // namespace google_breakpad
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#endif // PROCESSOR_STATIC_MAP_ITERATOR_H__
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