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// Copyright (c) 2012 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 "base/values.h"
#include <string.h>
#include <algorithm>
#include <cmath>
#include <ostream>
#include <utility>
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversion_utils.h"
namespace base {
namespace {
std::unique_ptr<Value> CopyWithoutEmptyChildren(const Value& node);
// Make a deep copy of |node|, but don't include empty lists or dictionaries
// in the copy. It's possible for this function to return NULL and it
// expects |node| to always be non-NULL.
std::unique_ptr<ListValue> CopyListWithoutEmptyChildren(const ListValue& list) {
std::unique_ptr<ListValue> copy;
for (const auto& entry : list) {
std::unique_ptr<Value> child_copy = CopyWithoutEmptyChildren(*entry);
if (child_copy) {
if (!copy)
copy.reset(new ListValue);
copy->Append(std::move(child_copy));
}
}
return copy;
}
std::unique_ptr<DictionaryValue> CopyDictionaryWithoutEmptyChildren(
const DictionaryValue& dict) {
std::unique_ptr<DictionaryValue> copy;
for (DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
std::unique_ptr<Value> child_copy = CopyWithoutEmptyChildren(it.value());
if (child_copy) {
if (!copy)
copy.reset(new DictionaryValue);
copy->SetWithoutPathExpansion(it.key(), std::move(child_copy));
}
}
return copy;
}
std::unique_ptr<Value> CopyWithoutEmptyChildren(const Value& node) {
switch (node.GetType()) {
case Value::TYPE_LIST:
return CopyListWithoutEmptyChildren(static_cast<const ListValue&>(node));
case Value::TYPE_DICTIONARY:
return CopyDictionaryWithoutEmptyChildren(
static_cast<const DictionaryValue&>(node));
default:
return node.CreateDeepCopy();
}
}
} // namespace
Value::~Value() {
}
// static
std::unique_ptr<Value> Value::CreateNullValue() {
return WrapUnique(new Value(TYPE_NULL));
}
bool Value::GetAsBinary(const BinaryValue**) const {
return false;
}
bool Value::GetAsBoolean(bool*) const {
return false;
}
bool Value::GetAsInteger(int*) const {
return false;
}
bool Value::GetAsDouble(double*) const {
return false;
}
bool Value::GetAsString(std::string*) const {
return false;
}
bool Value::GetAsString(const StringValue**) const {
return false;
}
bool Value::GetAsList(ListValue**) {
return false;
}
bool Value::GetAsList(const ListValue**) const {
return false;
}
bool Value::GetAsDictionary(DictionaryValue**) {
return false;
}
bool Value::GetAsDictionary(const DictionaryValue**) const {
return false;
}
Value* Value::DeepCopy() const {
// This method should only be getting called for null Values--all subclasses
// need to provide their own implementation;.
DCHECK(IsType(TYPE_NULL));
return CreateNullValue().release();
}
std::unique_ptr<Value> Value::CreateDeepCopy() const {
return WrapUnique(DeepCopy());
}
bool Value::Equals(const Value* other) const {
// This method should only be getting called for null Values--all subclasses
// need to provide their own implementation;.
DCHECK(IsType(TYPE_NULL));
return other->IsType(TYPE_NULL);
}
// static
bool Value::Equals(const Value* a, const Value* b) {
if ((a == NULL) && (b == NULL)) return true;
if ((a == NULL) ^ (b == NULL)) return false;
return a->Equals(b);
}
Value::Value(Type type) : type_(type) {}
Value::Value(const Value& that) : type_(that.type_) {}
Value& Value::operator=(const Value& that) {
type_ = that.type_;
return *this;
}
///////////////////// FundamentalValue ////////////////////
FundamentalValue::FundamentalValue(bool in_value)
: Value(TYPE_BOOLEAN), boolean_value_(in_value) {
}
FundamentalValue::FundamentalValue(int in_value)
: Value(TYPE_INTEGER), integer_value_(in_value) {
}
FundamentalValue::FundamentalValue(double in_value)
: Value(TYPE_DOUBLE), double_value_(in_value) {
if (!std::isfinite(double_value_)) {
NOTREACHED() << "Non-finite (i.e. NaN or positive/negative infinity) "
<< "values cannot be represented in JSON";
double_value_ = 0.0;
}
}
FundamentalValue::~FundamentalValue() {
}
bool FundamentalValue::GetAsBoolean(bool* out_value) const {
if (out_value && IsType(TYPE_BOOLEAN))
*out_value = boolean_value_;
return (IsType(TYPE_BOOLEAN));
}
bool FundamentalValue::GetAsInteger(int* out_value) const {
if (out_value && IsType(TYPE_INTEGER))
*out_value = integer_value_;
return (IsType(TYPE_INTEGER));
}
bool FundamentalValue::GetAsDouble(double* out_value) const {
if (out_value && IsType(TYPE_DOUBLE))
*out_value = double_value_;
else if (out_value && IsType(TYPE_INTEGER))
*out_value = integer_value_;
return (IsType(TYPE_DOUBLE) || IsType(TYPE_INTEGER));
}
FundamentalValue* FundamentalValue::DeepCopy() const {
switch (GetType()) {
case TYPE_BOOLEAN:
return new FundamentalValue(boolean_value_);
case TYPE_INTEGER:
return new FundamentalValue(integer_value_);
case TYPE_DOUBLE:
return new FundamentalValue(double_value_);
default:
NOTREACHED();
return NULL;
}
}
bool FundamentalValue::Equals(const Value* other) const {
if (other->GetType() != GetType())
return false;
switch (GetType()) {
case TYPE_BOOLEAN: {
bool lhs, rhs;
return GetAsBoolean(&lhs) && other->GetAsBoolean(&rhs) && lhs == rhs;
}
case TYPE_INTEGER: {
int lhs, rhs;
return GetAsInteger(&lhs) && other->GetAsInteger(&rhs) && lhs == rhs;
}
case TYPE_DOUBLE: {
double lhs, rhs;
return GetAsDouble(&lhs) && other->GetAsDouble(&rhs) && lhs == rhs;
}
default:
NOTREACHED();
return false;
}
}
///////////////////// StringValue ////////////////////
StringValue::StringValue(const std::string& in_value)
: Value(TYPE_STRING),
value_(in_value) {
DCHECK(IsStringUTF8(in_value));
}
StringValue::~StringValue() {
}
std::string* StringValue::GetString() {
return &value_;
}
const std::string& StringValue::GetString() const {
return value_;
}
bool StringValue::GetAsString(std::string* out_value) const {
if (out_value)
*out_value = value_;
return true;
}
bool StringValue::GetAsString(const StringValue** out_value) const {
if (out_value)
*out_value = this;
return true;
}
StringValue* StringValue::DeepCopy() const {
return new StringValue(value_);
}
bool StringValue::Equals(const Value* other) const {
if (other->GetType() != GetType())
return false;
std::string lhs, rhs;
return GetAsString(&lhs) && other->GetAsString(&rhs) && lhs == rhs;
}
///////////////////// BinaryValue ////////////////////
BinaryValue::BinaryValue()
: Value(TYPE_BINARY),
size_(0) {
}
BinaryValue::BinaryValue(std::unique_ptr<char[]> buffer, size_t size)
: Value(TYPE_BINARY), buffer_(std::move(buffer)), size_(size) {}
BinaryValue::~BinaryValue() {
}
// static
std::unique_ptr<BinaryValue> BinaryValue::CreateWithCopiedBuffer(
const char* buffer,
size_t size) {
std::unique_ptr<char[]> buffer_copy(new char[size]);
memcpy(buffer_copy.get(), buffer, size);
return base::MakeUnique<BinaryValue>(std::move(buffer_copy), size);
}
bool BinaryValue::GetAsBinary(const BinaryValue** out_value) const {
if (out_value)
*out_value = this;
return true;
}
BinaryValue* BinaryValue::DeepCopy() const {
return CreateWithCopiedBuffer(buffer_.get(), size_).release();
}
bool BinaryValue::Equals(const Value* other) const {
if (other->GetType() != GetType())
return false;
const BinaryValue* other_binary = static_cast<const BinaryValue*>(other);
if (other_binary->size_ != size_)
return false;
return !memcmp(GetBuffer(), other_binary->GetBuffer(), size_);
}
///////////////////// DictionaryValue ////////////////////
// static
std::unique_ptr<DictionaryValue> DictionaryValue::From(
std::unique_ptr<Value> value) {
DictionaryValue* out;
if (value && value->GetAsDictionary(&out)) {
ignore_result(value.release());
return WrapUnique(out);
}
return nullptr;
}
DictionaryValue::DictionaryValue()
: Value(TYPE_DICTIONARY) {
}
DictionaryValue::~DictionaryValue() {
Clear();
}
bool DictionaryValue::GetAsDictionary(DictionaryValue** out_value) {
if (out_value)
*out_value = this;
return true;
}
bool DictionaryValue::GetAsDictionary(const DictionaryValue** out_value) const {
if (out_value)
*out_value = this;
return true;
}
bool DictionaryValue::HasKey(const std::string& key) const {
DCHECK(IsStringUTF8(key));
auto current_entry = dictionary_.find(key);
DCHECK((current_entry == dictionary_.end()) || current_entry->second);
return current_entry != dictionary_.end();
}
void DictionaryValue::Clear() {
dictionary_.clear();
}
void DictionaryValue::Set(const std::string& path,
std::unique_ptr<Value> in_value) {
DCHECK(IsStringUTF8(path));
DCHECK(in_value);
std::string current_path(path);
DictionaryValue* current_dictionary = this;
for (size_t delimiter_position = current_path.find('.');
delimiter_position != std::string::npos;
delimiter_position = current_path.find('.')) {
// Assume that we're indexing into a dictionary.
std::string key(current_path, 0, delimiter_position);
DictionaryValue* child_dictionary = NULL;
if (!current_dictionary->GetDictionary(key, &child_dictionary)) {
child_dictionary = new DictionaryValue;
current_dictionary->SetWithoutPathExpansion(key, child_dictionary);
}
current_dictionary = child_dictionary;
current_path.erase(0, delimiter_position + 1);
}
current_dictionary->SetWithoutPathExpansion(current_path,
std::move(in_value));
}
void DictionaryValue::Set(const std::string& path, Value* in_value) {
Set(path, WrapUnique(in_value));
}
void DictionaryValue::SetBoolean(const std::string& path, bool in_value) {
Set(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetInteger(const std::string& path, int in_value) {
Set(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetDouble(const std::string& path, double in_value) {
Set(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetString(const std::string& path,
const std::string& in_value) {
Set(path, new StringValue(in_value));
}
void DictionaryValue::SetWithoutPathExpansion(const std::string& key,
std::unique_ptr<Value> in_value) {
dictionary_[key] = std::move(in_value);
}
void DictionaryValue::SetWithoutPathExpansion(const std::string& key,
Value* in_value) {
SetWithoutPathExpansion(key, WrapUnique(in_value));
}
void DictionaryValue::SetBooleanWithoutPathExpansion(
const std::string& path, bool in_value) {
SetWithoutPathExpansion(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetIntegerWithoutPathExpansion(
const std::string& path, int in_value) {
SetWithoutPathExpansion(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetDoubleWithoutPathExpansion(
const std::string& path, double in_value) {
SetWithoutPathExpansion(path, new FundamentalValue(in_value));
}
void DictionaryValue::SetStringWithoutPathExpansion(
const std::string& path, const std::string& in_value) {
SetWithoutPathExpansion(path, new StringValue(in_value));
}
bool DictionaryValue::Get(StringPiece path,
const Value** out_value) const {
DCHECK(IsStringUTF8(path));
StringPiece current_path(path);
const DictionaryValue* current_dictionary = this;
for (size_t delimiter_position = current_path.find('.');
delimiter_position != std::string::npos;
delimiter_position = current_path.find('.')) {
const DictionaryValue* child_dictionary = NULL;
if (!current_dictionary->GetDictionaryWithoutPathExpansion(
current_path.substr(0, delimiter_position).as_string(),
&child_dictionary)) {
return false;
}
current_dictionary = child_dictionary;
current_path = current_path.substr(delimiter_position + 1);
}
return current_dictionary->GetWithoutPathExpansion(current_path.as_string(),
out_value);
}
bool DictionaryValue::Get(StringPiece path, Value** out_value) {
return static_cast<const DictionaryValue&>(*this).Get(
path,
const_cast<const Value**>(out_value));
}
bool DictionaryValue::GetBoolean(const std::string& path,
bool* bool_value) const {
const Value* value;
if (!Get(path, &value))
return false;
return value->GetAsBoolean(bool_value);
}
bool DictionaryValue::GetInteger(const std::string& path,
int* out_value) const {
const Value* value;
if (!Get(path, &value))
return false;
return value->GetAsInteger(out_value);
}
bool DictionaryValue::GetDouble(const std::string& path,
double* out_value) const {
const Value* value;
if (!Get(path, &value))
return false;
return value->GetAsDouble(out_value);
}
bool DictionaryValue::GetString(const std::string& path,
std::string* out_value) const {
const Value* value;
if (!Get(path, &value))
return false;
return value->GetAsString(out_value);
}
bool DictionaryValue::GetStringASCII(const std::string& path,
std::string* out_value) const {
std::string out;
if (!GetString(path, &out))
return false;
if (!IsStringASCII(out)) {
NOTREACHED();
return false;
}
out_value->assign(out);
return true;
}
bool DictionaryValue::GetBinary(const std::string& path,
const BinaryValue** out_value) const {
const Value* value;
bool result = Get(path, &value);
if (!result || !value->IsType(TYPE_BINARY))
return false;
if (out_value)
*out_value = static_cast<const BinaryValue*>(value);
return true;
}
bool DictionaryValue::GetBinary(const std::string& path,
BinaryValue** out_value) {
return static_cast<const DictionaryValue&>(*this).GetBinary(
path,
const_cast<const BinaryValue**>(out_value));
}
bool DictionaryValue::GetDictionary(StringPiece path,
const DictionaryValue** out_value) const {
const Value* value;
bool result = Get(path, &value);
if (!result || !value->IsType(TYPE_DICTIONARY))
return false;
if (out_value)
*out_value = static_cast<const DictionaryValue*>(value);
return true;
}
bool DictionaryValue::GetDictionary(StringPiece path,
DictionaryValue** out_value) {
return static_cast<const DictionaryValue&>(*this).GetDictionary(
path,
const_cast<const DictionaryValue**>(out_value));
}
bool DictionaryValue::GetList(const std::string& path,
const ListValue** out_value) const {
const Value* value;
bool result = Get(path, &value);
if (!result || !value->IsType(TYPE_LIST))
return false;
if (out_value)
*out_value = static_cast<const ListValue*>(value);
return true;
}
bool DictionaryValue::GetList(const std::string& path, ListValue** out_value) {
return static_cast<const DictionaryValue&>(*this).GetList(
path,
const_cast<const ListValue**>(out_value));
}
bool DictionaryValue::GetWithoutPathExpansion(const std::string& key,
const Value** out_value) const {
DCHECK(IsStringUTF8(key));
auto entry_iterator = dictionary_.find(key);
if (entry_iterator == dictionary_.end())
return false;
if (out_value)
*out_value = entry_iterator->second.get();
return true;
}
bool DictionaryValue::GetWithoutPathExpansion(const std::string& key,
Value** out_value) {
return static_cast<const DictionaryValue&>(*this).GetWithoutPathExpansion(
key,
const_cast<const Value**>(out_value));
}
bool DictionaryValue::GetBooleanWithoutPathExpansion(const std::string& key,
bool* out_value) const {
const Value* value;
if (!GetWithoutPathExpansion(key, &value))
return false;
return value->GetAsBoolean(out_value);
}
bool DictionaryValue::GetIntegerWithoutPathExpansion(const std::string& key,
int* out_value) const {
const Value* value;
if (!GetWithoutPathExpansion(key, &value))
return false;
return value->GetAsInteger(out_value);
}
bool DictionaryValue::GetDoubleWithoutPathExpansion(const std::string& key,
double* out_value) const {
const Value* value;
if (!GetWithoutPathExpansion(key, &value))
return false;
return value->GetAsDouble(out_value);
}
bool DictionaryValue::GetStringWithoutPathExpansion(
const std::string& key,
std::string* out_value) const {
const Value* value;
if (!GetWithoutPathExpansion(key, &value))
return false;
return value->GetAsString(out_value);
}
bool DictionaryValue::GetDictionaryWithoutPathExpansion(
const std::string& key,
const DictionaryValue** out_value) const {
const Value* value;
bool result = GetWithoutPathExpansion(key, &value);
if (!result || !value->IsType(TYPE_DICTIONARY))
return false;
if (out_value)
*out_value = static_cast<const DictionaryValue*>(value);
return true;
}
bool DictionaryValue::GetDictionaryWithoutPathExpansion(
const std::string& key,
DictionaryValue** out_value) {
const DictionaryValue& const_this =
static_cast<const DictionaryValue&>(*this);
return const_this.GetDictionaryWithoutPathExpansion(
key,
const_cast<const DictionaryValue**>(out_value));
}
bool DictionaryValue::GetListWithoutPathExpansion(
const std::string& key,
const ListValue** out_value) const {
const Value* value;
bool result = GetWithoutPathExpansion(key, &value);
if (!result || !value->IsType(TYPE_LIST))
return false;
if (out_value)
*out_value = static_cast<const ListValue*>(value);
return true;
}
bool DictionaryValue::GetListWithoutPathExpansion(const std::string& key,
ListValue** out_value) {
return
static_cast<const DictionaryValue&>(*this).GetListWithoutPathExpansion(
key,
const_cast<const ListValue**>(out_value));
}
bool DictionaryValue::Remove(const std::string& path,
std::unique_ptr<Value>* out_value) {
DCHECK(IsStringUTF8(path));
std::string current_path(path);
DictionaryValue* current_dictionary = this;
size_t delimiter_position = current_path.rfind('.');
if (delimiter_position != std::string::npos) {
if (!GetDictionary(current_path.substr(0, delimiter_position),
&current_dictionary))
return false;
current_path.erase(0, delimiter_position + 1);
}
return current_dictionary->RemoveWithoutPathExpansion(current_path,
out_value);
}
bool DictionaryValue::RemoveWithoutPathExpansion(
const std::string& key,
std::unique_ptr<Value>* out_value) {
DCHECK(IsStringUTF8(key));
auto entry_iterator = dictionary_.find(key);
if (entry_iterator == dictionary_.end())
return false;
if (out_value)
*out_value = std::move(entry_iterator->second);
dictionary_.erase(entry_iterator);
return true;
}
bool DictionaryValue::RemovePath(const std::string& path,
std::unique_ptr<Value>* out_value) {
bool result = false;
size_t delimiter_position = path.find('.');
if (delimiter_position == std::string::npos)
return RemoveWithoutPathExpansion(path, out_value);
const std::string subdict_path = path.substr(0, delimiter_position);
DictionaryValue* subdict = NULL;
if (!GetDictionary(subdict_path, &subdict))
return false;
result = subdict->RemovePath(path.substr(delimiter_position + 1),
out_value);
if (result && subdict->empty())
RemoveWithoutPathExpansion(subdict_path, NULL);
return result;
}
std::unique_ptr<DictionaryValue> DictionaryValue::DeepCopyWithoutEmptyChildren()
const {
std::unique_ptr<DictionaryValue> copy =
CopyDictionaryWithoutEmptyChildren(*this);
if (!copy)
copy.reset(new DictionaryValue);
return copy;
}
void DictionaryValue::MergeDictionary(const DictionaryValue* dictionary) {
for (DictionaryValue::Iterator it(*dictionary); !it.IsAtEnd(); it.Advance()) {
const Value* merge_value = &it.value();
// Check whether we have to merge dictionaries.
if (merge_value->IsType(Value::TYPE_DICTIONARY)) {
DictionaryValue* sub_dict;
if (GetDictionaryWithoutPathExpansion(it.key(), &sub_dict)) {
sub_dict->MergeDictionary(
static_cast<const DictionaryValue*>(merge_value));
continue;
}
}
// All other cases: Make a copy and hook it up.
SetWithoutPathExpansion(it.key(), merge_value->DeepCopy());
}
}
void DictionaryValue::Swap(DictionaryValue* other) {
dictionary_.swap(other->dictionary_);
}
DictionaryValue::Iterator::Iterator(const DictionaryValue& target)
: target_(target),
it_(target.dictionary_.begin()) {}
DictionaryValue::Iterator::Iterator(const Iterator& other) = default;
DictionaryValue::Iterator::~Iterator() {}
DictionaryValue* DictionaryValue::DeepCopy() const {
DictionaryValue* result = new DictionaryValue;
for (const auto& current_entry : dictionary_) {
result->SetWithoutPathExpansion(current_entry.first,
current_entry.second->CreateDeepCopy());
}
return result;
}
std::unique_ptr<DictionaryValue> DictionaryValue::CreateDeepCopy() const {
return WrapUnique(DeepCopy());
}
bool DictionaryValue::Equals(const Value* other) const {
if (other->GetType() != GetType())
return false;
const DictionaryValue* other_dict =
static_cast<const DictionaryValue*>(other);
Iterator lhs_it(*this);
Iterator rhs_it(*other_dict);
while (!lhs_it.IsAtEnd() && !rhs_it.IsAtEnd()) {
if (lhs_it.key() != rhs_it.key() ||
!lhs_it.value().Equals(&rhs_it.value())) {
return false;
}
lhs_it.Advance();
rhs_it.Advance();
}
if (!lhs_it.IsAtEnd() || !rhs_it.IsAtEnd())
return false;
return true;
}
///////////////////// ListValue ////////////////////
// static
std::unique_ptr<ListValue> ListValue::From(std::unique_ptr<Value> value) {
ListValue* out;
if (value && value->GetAsList(&out)) {
ignore_result(value.release());
return WrapUnique(out);
}
return nullptr;
}
ListValue::ListValue() : Value(TYPE_LIST) {
}
ListValue::~ListValue() {
Clear();
}
void ListValue::Clear() {
list_.clear();
}
bool ListValue::Set(size_t index, Value* in_value) {
return Set(index, WrapUnique(in_value));
}
bool ListValue::Set(size_t index, std::unique_ptr<Value> in_value) {
if (!in_value)
return false;
if (index >= list_.size()) {
// Pad out any intermediate indexes with null settings
while (index > list_.size())
Append(CreateNullValue());
Append(std::move(in_value));
} else {
// TODO(dcheng): remove this DCHECK once the raw pointer version is removed?
DCHECK(list_[index] != in_value);
list_[index] = std::move(in_value);
}
return true;
}
bool ListValue::Get(size_t index, const Value** out_value) const {
if (index >= list_.size())
return false;
if (out_value)
*out_value = list_[index].get();
return true;
}
bool ListValue::Get(size_t index, Value** out_value) {
return static_cast<const ListValue&>(*this).Get(
index,
const_cast<const Value**>(out_value));
}
bool ListValue::GetBoolean(size_t index, bool* bool_value) const {
const Value* value;
if (!Get(index, &value))
return false;
return value->GetAsBoolean(bool_value);
}
bool ListValue::GetInteger(size_t index, int* out_value) const {
const Value* value;
if (!Get(index, &value))
return false;
return value->GetAsInteger(out_value);
}
bool ListValue::GetDouble(size_t index, double* out_value) const {
const Value* value;
if (!Get(index, &value))
return false;
return value->GetAsDouble(out_value);
}
bool ListValue::GetString(size_t index, std::string* out_value) const {
const Value* value;
if (!Get(index, &value))
return false;
return value->GetAsString(out_value);
}
bool ListValue::GetBinary(size_t index, const BinaryValue** out_value) const {
const Value* value;
bool result = Get(index, &value);
if (!result || !value->IsType(TYPE_BINARY))
return false;
if (out_value)
*out_value = static_cast<const BinaryValue*>(value);
return true;
}
bool ListValue::GetBinary(size_t index, BinaryValue** out_value) {
return static_cast<const ListValue&>(*this).GetBinary(
index,
const_cast<const BinaryValue**>(out_value));
}
bool ListValue::GetDictionary(size_t index,
const DictionaryValue** out_value) const {
const Value* value;
bool result = Get(index, &value);
if (!result || !value->IsType(TYPE_DICTIONARY))
return false;
if (out_value)
*out_value = static_cast<const DictionaryValue*>(value);
return true;
}
bool ListValue::GetDictionary(size_t index, DictionaryValue** out_value) {
return static_cast<const ListValue&>(*this).GetDictionary(
index,
const_cast<const DictionaryValue**>(out_value));
}
bool ListValue::GetList(size_t index, const ListValue** out_value) const {
const Value* value;
bool result = Get(index, &value);
if (!result || !value->IsType(TYPE_LIST))
return false;
if (out_value)
*out_value = static_cast<const ListValue*>(value);
return true;
}
bool ListValue::GetList(size_t index, ListValue** out_value) {
return static_cast<const ListValue&>(*this).GetList(
index,
const_cast<const ListValue**>(out_value));
}
bool ListValue::Remove(size_t index, std::unique_ptr<Value>* out_value) {
if (index >= list_.size())
return false;
if (out_value)
*out_value = std::move(list_[index]);
list_.erase(list_.begin() + index);
return true;
}
bool ListValue::Remove(const Value& value, size_t* index) {
for (auto it = list_.begin(); it != list_.end(); ++it) {
if ((*it)->Equals(&value)) {
size_t previous_index = it - list_.begin();
list_.erase(it);
if (index)
*index = previous_index;
return true;
}
}
return false;
}
ListValue::iterator ListValue::Erase(iterator iter,
std::unique_ptr<Value>* out_value) {
if (out_value)
*out_value = std::move(*Storage::iterator(iter));
return list_.erase(iter);
}
void ListValue::Append(std::unique_ptr<Value> in_value) {
list_.push_back(std::move(in_value));
}
void ListValue::Append(Value* in_value) {
DCHECK(in_value);
Append(WrapUnique(in_value));
}
void ListValue::AppendBoolean(bool in_value) {
Append(new FundamentalValue(in_value));
}
void ListValue::AppendInteger(int in_value) {
Append(new FundamentalValue(in_value));
}
void ListValue::AppendDouble(double in_value) {
Append(new FundamentalValue(in_value));
}
void ListValue::AppendString(const std::string& in_value) {
Append(new StringValue(in_value));
}
void ListValue::AppendStrings(const std::vector<std::string>& in_values) {
for (std::vector<std::string>::const_iterator it = in_values.begin();
it != in_values.end(); ++it) {
AppendString(*it);
}
}
bool ListValue::AppendIfNotPresent(Value* in_value) {
DCHECK(in_value);
for (const auto& entry : list_) {
if (entry->Equals(in_value)) {
delete in_value;
return false;
}
}
list_.emplace_back(in_value);
return true;
}
bool ListValue::Insert(size_t index, Value* in_value) {
DCHECK(in_value);
if (index > list_.size())
return false;
list_.insert(list_.begin() + index, WrapUnique(in_value));
return true;
}
ListValue::const_iterator ListValue::Find(const Value& value) const {
return std::find_if(list_.begin(), list_.end(),
[&value](const std::unique_ptr<Value>& entry) {
return entry->Equals(&value);
});
}
void ListValue::Swap(ListValue* other) {
list_.swap(other->list_);
}
bool ListValue::GetAsList(ListValue** out_value) {
if (out_value)
*out_value = this;
return true;
}
bool ListValue::GetAsList(const ListValue** out_value) const {
if (out_value)
*out_value = this;
return true;
}
ListValue* ListValue::DeepCopy() const {
ListValue* result = new ListValue;
for (const auto& entry : list_)
result->Append(entry->CreateDeepCopy());
return result;
}
std::unique_ptr<ListValue> ListValue::CreateDeepCopy() const {
return WrapUnique(DeepCopy());
}
bool ListValue::Equals(const Value* other) const {
if (other->GetType() != GetType())
return false;
const ListValue* other_list =
static_cast<const ListValue*>(other);
Storage::const_iterator lhs_it, rhs_it;
for (lhs_it = begin(), rhs_it = other_list->begin();
lhs_it != end() && rhs_it != other_list->end();
++lhs_it, ++rhs_it) {
if (!(*lhs_it)->Equals(rhs_it->get()))
return false;
}
if (lhs_it != end() || rhs_it != other_list->end())
return false;
return true;
}
std::ostream& operator<<(std::ostream& out, const Value& value) {
std::string json;
JSONWriter::WriteWithOptions(value, JSONWriter::OPTIONS_PRETTY_PRINT, &json);
return out << json;
}
} // namespace base