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-// Copyright 2010 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.
-
-// static_map-inl.h: StaticMap implementation.
-//
-// See static_map.h for documentation.
-//
-// Author: Siyang Xie (lambxsy@google.com)
-
-
-#ifndef PROCESSOR_STATIC_MAP_INL_H__
-#define PROCESSOR_STATIC_MAP_INL_H__
-
-#include "processor/static_map.h"
-#include "processor/static_map_iterator-inl.h"
-#include "processor/logging.h"
-
-namespace google_breakpad {
-
-template<typename Key, typename Value, typename Compare>
-StaticMap<Key, Value, Compare>::StaticMap(const char* raw_data)
- : raw_data_(raw_data),
- compare_() {
- // First 4 Bytes store the number of nodes.
- num_nodes_ = *(reinterpret_cast<const uint32_t*>(raw_data_));
-
- offsets_ = reinterpret_cast<const uint32_t*>(
- raw_data_ + sizeof(num_nodes_));
-
- keys_ = reinterpret_cast<const Key*>(
- raw_data_ + (1 + num_nodes_) * sizeof(uint32_t));
-}
-
-// find(), lower_bound() and upper_bound() implement binary search algorithm.
-template<typename Key, typename Value, typename Compare>
-StaticMapIterator<Key, Value, Compare>
-StaticMap<Key, Value, Compare>::find(const Key &key) const {
- int begin = 0;
- int end = num_nodes_;
- int middle;
- int compare_result;
- while (begin < end) {
- middle = begin + (end - begin) / 2;
- compare_result = compare_(key, GetKeyAtIndex(middle));
- if (compare_result == 0)
- return IteratorAtIndex(middle);
- if (compare_result < 0) {
- end = middle;
- } else {
- begin = middle + 1;
- }
- }
- return this->end();
-}
-
-template<typename Key, typename Value, typename Compare>
-StaticMapIterator<Key, Value, Compare>
-StaticMap<Key, Value, Compare>::lower_bound(const Key &key) const {
- int begin = 0;
- int end = num_nodes_;
- int middle;
- int comp_result;
- while (begin < end) {
- middle = begin + (end - begin) / 2;
- comp_result = compare_(key, GetKeyAtIndex(middle));
- if (comp_result == 0)
- return IteratorAtIndex(middle);
- if (comp_result < 0) {
- end = middle;
- } else {
- begin = middle + 1;
- }
- }
- return IteratorAtIndex(begin);
-}
-
-template<typename Key, typename Value, typename Compare>
-StaticMapIterator<Key, Value, Compare>
-StaticMap<Key, Value, Compare>::upper_bound(const Key &key) const {
- int begin = 0;
- int end = num_nodes_;
- int middle;
- int compare_result;
- while (begin < end) {
- middle = begin + (end - begin) / 2;
- compare_result = compare_(key, GetKeyAtIndex(middle));
- if (compare_result == 0)
- return IteratorAtIndex(middle + 1);
- if (compare_result < 0) {
- end = middle;
- } else {
- begin = middle + 1;
- }
- }
- return IteratorAtIndex(begin);
-}
-
-template<typename Key, typename Value, typename Compare>
-bool StaticMap<Key, Value, Compare>::ValidateInMemoryStructure() const {
- // check the number of nodes is non-negative:
- if (!raw_data_) return false;
- int32_t num_nodes = *(reinterpret_cast<const int32_t*>(raw_data_));
- if (num_nodes < 0) {
- BPLOG(INFO) << "StaticMap check failed: negative number of nodes";
- return false;
- }
-
- int node_index = 0;
- if (num_nodes_) {
- uint64_t first_offset = sizeof(int32_t) * (num_nodes_ + 1)
- + sizeof(Key) * num_nodes_;
- // Num_nodes_ is too large.
- if (first_offset > 0xffffffffUL) {
- BPLOG(INFO) << "StaticMap check failed: size exceeds limit";
- return false;
- }
- if (offsets_[node_index] != static_cast<uint32_t>(first_offset)) {
- BPLOG(INFO) << "StaticMap check failed: first node offset is incorrect";
- return false;
- }
- }
-
- for (node_index = 1; node_index < num_nodes_; ++node_index) {
- // Check offsets[i] is strictly increasing:
- if (offsets_[node_index] <= offsets_[node_index - 1]) {
- BPLOG(INFO) << "StaticMap check failed: node offsets non-increasing";
- return false;
- }
- // Check Key[i] is strictly increasing as no duplicate keys are allowed.
- if (compare_(GetKeyAtIndex(node_index),
- GetKeyAtIndex(node_index - 1)) <= 0) {
- BPLOG(INFO) << "StaticMap check failed: node keys non-increasing";
- return false;
- }
- }
- return true;
-}
-
-template<typename Key, typename Value, typename Compare>
-const Key StaticMap<Key, Value, Compare>::GetKeyAtIndex(int index) const {
- if (index < 0 || index >= num_nodes_) {
- BPLOG(ERROR) << "Key index out of range error";
- // Key type is required to be primitive type. Return 0 if index is invalid.
- return 0;
- }
- return keys_[index];
-}
-
-} // namespace google_breakpad
-
-#endif // PROCESSOR_STATIC_MAP_INL_H__