Move the bits of Prefs where production code has only trivially easy

chrome/browser/prefs/pref_value_map.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/prefs/pref_value_map.h"
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/stl_util.h"
-#include "base/values.h"
-
-PrefValueMap::PrefValueMap() {}
-
-PrefValueMap::~PrefValueMap() {
-  Clear();
-}
-
-bool PrefValueMap::GetValue(const std::string& key, const Value** value) const {
-  const Map::const_iterator entry = prefs_.find(key);
-  if (entry != prefs_.end()) {
-    if (value)
-      *value = entry->second;
-    return true;
-  }
-
-  return false;
-}
-
-bool PrefValueMap::GetValue(const std::string& key, Value** value) {
-  const Map::const_iterator entry = prefs_.find(key);
-  if (entry != prefs_.end()) {
-    if (value)
-      *value = entry->second;
-    return true;
-  }
-
-  return false;
-}
-
-bool PrefValueMap::SetValue(const std::string& key, Value* value) {
-  DCHECK(value);
-  scoped_ptr<Value> value_ptr(value);
-  const Map::iterator entry = prefs_.find(key);
-  if (entry != prefs_.end()) {
-    if (Value::Equals(entry->second, value))
-      return false;
-    delete entry->second;
-    entry->second = value_ptr.release();
-  } else {
-    prefs_[key] = value_ptr.release();
-  }
-
-  return true;
-}
-
-bool PrefValueMap::RemoveValue(const std::string& key) {
-  const Map::iterator entry = prefs_.find(key);
-  if (entry != prefs_.end()) {
-    delete entry->second;
-    prefs_.erase(entry);
-    return true;
-  }
-
-  return false;
-}
-
-void PrefValueMap::Clear() {
-  STLDeleteValues(&prefs_);
-  prefs_.clear();
-}
-
-void PrefValueMap::Swap(PrefValueMap* other) {
-  prefs_.swap(other->prefs_);
-}
-
-PrefValueMap::iterator PrefValueMap::begin() {
-  return prefs_.begin();
-}
-
-PrefValueMap::iterator PrefValueMap::end() {
-  return prefs_.end();
-}
-
-PrefValueMap::const_iterator PrefValueMap::begin() const {
-  return prefs_.begin();
-}
-
-PrefValueMap::const_iterator PrefValueMap::end() const {
-  return prefs_.end();
-}
-
-bool PrefValueMap::GetBoolean(const std::string& key,
-                              bool* value) const {
-  const Value* stored_value = NULL;
-  return GetValue(key, &stored_value) && stored_value->GetAsBoolean(value);
-}
-
-void PrefValueMap::SetBoolean(const std::string& key, bool value) {
-  SetValue(key, Value::CreateBooleanValue(value));
-}
-
-bool PrefValueMap::GetString(const std::string& key,
-                             std::string* value) const {
-  const Value* stored_value = NULL;
-  return GetValue(key, &stored_value) && stored_value->GetAsString(value);
-}
-
-void PrefValueMap::SetString(const std::string& key,
-                             const std::string& value) {
-  SetValue(key, Value::CreateStringValue(value));
-}
-
-bool PrefValueMap::GetInteger(const std::string& key, int* value) const {
-  const Value* stored_value = NULL;
-  return GetValue(key, &stored_value) && stored_value->GetAsInteger(value);
-}
-
-void PrefValueMap::SetInteger(const std::string& key, const int value) {
-  SetValue(key, Value::CreateIntegerValue(value));
-}
-
-void PrefValueMap::GetDifferingKeys(
-    const PrefValueMap* other,
-    std::vector<std::string>* differing_keys) const {
-  differing_keys->clear();
-
-  // Walk over the maps in lockstep, adding everything that is different.
-  Map::const_iterator this_pref(prefs_.begin());
-  Map::const_iterator other_pref(other->prefs_.begin());
-  while (this_pref != prefs_.end() && other_pref != other->prefs_.end()) {
-    const int diff = this_pref->first.compare(other_pref->first);
-    if (diff == 0) {
-      if (!this_pref->second->Equals(other_pref->second))
-        differing_keys->push_back(this_pref->first);
-      ++this_pref;
-      ++other_pref;
-    } else if (diff < 0) {
-      differing_keys->push_back(this_pref->first);
-      ++this_pref;
-    } else if (diff > 0) {
-      differing_keys->push_back(other_pref->first);
-      ++other_pref;
-    }
-  }
-
-  // Add the remaining entries.
-  for ( ; this_pref != prefs_.end(); ++this_pref)
-      differing_keys->push_back(this_pref->first);
-  for ( ; other_pref != other->prefs_.end(); ++other_pref)
-      differing_keys->push_back(other_pref->first);
-}