aboutsummaryrefslogtreecommitdiff
path: root/src/processor/address_map.h
blob: b38da24b7b494ea72189b7d7d1592d4126139182 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
// 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__