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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// address_map.h: Address maps.
//
// An address map contains a set of objects keyed by address. Objects are
// retrieved from the map by returning the object with the highest key less
// than or equal to the lookup key.
//
// Author: Mark Mentovai
#ifndef PROCESSOR_ADDRESS_MAP_H__
#define PROCESSOR_ADDRESS_MAP_H__
#include <map>
namespace google_airbag {
template<typename AddressType, typename EntryType>
class AddressMap {
public:
AddressMap() : map_() {}
// Inserts an entry into the map. Returns false without storing the entry
// if an entry is already stored in the map at the same address as specified
// by the address argument.
bool Store(const AddressType &address, const EntryType &entry);
// Locates the entry stored at the highest address less than or equal to
// the address argument. If there is no such range, or if there is a
// parameter error, returns false. The entry is returned in entry. If
// entry_address is not NULL, it will be set to the address that the entry
// was stored at.
bool Retrieve(const AddressType &address,
EntryType *entry, AddressType *entry_address) const;
// Empties the address map, restoring it to the same state as when it was
// initially created.
void Clear();
private:
// Convenience types.
typedef std::map<AddressType, EntryType> AddressToEntryMap;
typedef typename AddressToEntryMap::const_iterator MapConstIterator;
typedef typename AddressToEntryMap::value_type MapValue;
// Maps the address of each entry to an EntryType.
AddressToEntryMap map_;
};
} // namespace google_airbag
#endif // PROCESSOR_ADDRESS_MAP_H__
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