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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/cbor/values.h"
#include <new>
#include <ostream>
#include <string_view>
#include <utility>
#include "base/check_op.h"
#include "base/containers/span.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_util.h"
#include "components/cbor/constants.h"
namespace cbor {
// static
Value Value::InvalidUTF8StringValueForTesting(std::string_view in_string) {
return Value(base::as_byte_span(in_string), Type::INVALID_UTF8);
}
Value::Value() noexcept : type_(Type::NONE) {}
Value::Value(Value&& that) noexcept {
InternalMoveConstructFrom(std::move(that));
}
Value::Value(Type type) : type_(type) {
// Initialize with the default value.
switch (type_) {
case Type::UNSIGNED:
case Type::NEGATIVE:
integer_value_ = 0;
return;
case Type::INVALID_UTF8:
case Type::BYTE_STRING:
new (&bytestring_value_) BinaryValue();
return;
case Type::STRING:
new (&string_value_) std::string();
return;
case Type::ARRAY:
new (&array_value_) ArrayValue();
return;
case Type::MAP:
new (&map_value_) MapValue();
return;
case Type::TAG:
NOTREACHED() << constants::kUnsupportedMajorType;
case Type::SIMPLE_VALUE:
simple_value_ = Value::SimpleValue::UNDEFINED;
return;
case Type::FLOAT_VALUE:
float_value_ = 0.0;
return;
case Type::NONE:
return;
}
NOTREACHED();
}
Value::Value(SimpleValue in_simple)
: type_(Type::SIMPLE_VALUE), simple_value_(in_simple) {
CHECK(static_cast<int>(in_simple) >= 20 && static_cast<int>(in_simple) <= 23);
}
Value::Value(bool boolean_value) : type_(Type::SIMPLE_VALUE) {
simple_value_ = boolean_value ? Value::SimpleValue::TRUE_VALUE
: Value::SimpleValue::FALSE_VALUE;
}
Value::Value(double float_value)
: type_(Type::FLOAT_VALUE), float_value_(float_value) {}
Value::Value(int integer_value)
: Value(base::checked_cast<int64_t>(integer_value)) {}
Value::Value(int64_t integer_value) : integer_value_(integer_value) {
type_ = integer_value >= 0 ? Type::UNSIGNED : Type::NEGATIVE;
}
Value::Value(base::span<const uint8_t> in_bytes)
: type_(Type::BYTE_STRING),
bytestring_value_(in_bytes.begin(), in_bytes.end()) {}
Value::Value(base::span<const uint8_t> in_bytes, Type type)
: type_(type), bytestring_value_(in_bytes.begin(), in_bytes.end()) {
DCHECK(type_ == Type::BYTE_STRING || type_ == Type::INVALID_UTF8);
}
Value::Value(BinaryValue&& in_bytes) noexcept
: type_(Type::BYTE_STRING), bytestring_value_(std::move(in_bytes)) {}
Value::Value(const char* in_string, Type type)
: Value(std::string_view(in_string), type) {}
Value::Value(std::string&& in_string, Type type) noexcept : type_(type) {
switch (type_) {
case Type::STRING:
new (&string_value_) std::string();
string_value_ = std::move(in_string);
DCHECK(base::IsStringUTF8(string_value_));
break;
case Type::BYTE_STRING:
new (&bytestring_value_) BinaryValue();
bytestring_value_ = BinaryValue(in_string.begin(), in_string.end());
break;
default:
NOTREACHED();
}
}
Value::Value(std::string_view in_string, Type type) : type_(type) {
switch (type_) {
case Type::STRING:
new (&string_value_) std::string();
string_value_ = std::string(in_string);
DCHECK(base::IsStringUTF8(string_value_));
break;
case Type::BYTE_STRING:
new (&bytestring_value_) BinaryValue();
bytestring_value_ = BinaryValue(in_string.begin(), in_string.end());
break;
default:
NOTREACHED();
}
}
Value::Value(const ArrayValue& in_array) : type_(Type::ARRAY), array_value_() {
array_value_.reserve(in_array.size());
for (const auto& val : in_array)
array_value_.emplace_back(val.Clone());
}
Value::Value(ArrayValue&& in_array) noexcept
: type_(Type::ARRAY), array_value_(std::move(in_array)) {}
Value::Value(const MapValue& in_map) : type_(Type::MAP), map_value_() {
map_value_.reserve(in_map.size());
for (const auto& it : in_map)
map_value_.emplace_hint(map_value_.end(), it.first.Clone(),
it.second.Clone());
}
Value::Value(MapValue&& in_map) noexcept
: type_(Type::MAP), map_value_(std::move(in_map)) {}
Value& Value::operator=(Value&& that) noexcept {
InternalCleanup();
InternalMoveConstructFrom(std::move(that));
return *this;
}
Value::~Value() {
InternalCleanup();
}
Value Value::Clone() const {
switch (type_) {
case Type::NONE:
return Value();
case Type::INVALID_UTF8:
return Value(bytestring_value_, Type::INVALID_UTF8);
case Type::UNSIGNED:
case Type::NEGATIVE:
return Value(integer_value_);
case Type::BYTE_STRING:
return Value(bytestring_value_);
case Type::STRING:
return Value(string_value_);
case Type::ARRAY:
return Value(array_value_);
case Type::MAP:
return Value(map_value_);
case Type::TAG:
NOTREACHED() << constants::kUnsupportedMajorType;
case Type::SIMPLE_VALUE:
return Value(simple_value_);
case Type::FLOAT_VALUE:
return Value(float_value_);
}
NOTREACHED();
}
Value::SimpleValue Value::GetSimpleValue() const {
CHECK(is_simple());
return simple_value_;
}
bool Value::GetBool() const {
CHECK(is_bool());
return simple_value_ == SimpleValue::TRUE_VALUE;
}
double Value::GetDouble() const {
CHECK(is_double());
return float_value_;
}
const int64_t& Value::GetInteger() const {
CHECK(is_integer());
return integer_value_;
}
const int64_t& Value::GetUnsigned() const {
CHECK(is_unsigned());
CHECK_GE(integer_value_, 0);
return integer_value_;
}
const int64_t& Value::GetNegative() const {
CHECK(is_negative());
CHECK_LT(integer_value_, 0);
return integer_value_;
}
const std::string& Value::GetString() const {
CHECK(is_string());
return string_value_;
}
const Value::BinaryValue& Value::GetBytestring() const {
CHECK(is_bytestring());
return bytestring_value_;
}
std::string_view Value::GetBytestringAsString() const {
CHECK(is_bytestring());
const auto& bytestring_value = GetBytestring();
return std::string_view(
reinterpret_cast<const char*>(bytestring_value.data()),
bytestring_value.size());
}
const Value::ArrayValue& Value::GetArray() const {
CHECK(is_array());
return array_value_;
}
const Value::MapValue& Value::GetMap() const {
CHECK(is_map());
return map_value_;
}
const Value::BinaryValue& Value::GetInvalidUTF8() const {
CHECK(is_invalid_utf8());
return bytestring_value_;
}
void Value::InternalMoveConstructFrom(Value&& that) {
type_ = that.type_;
switch (type_) {
case Type::UNSIGNED:
case Type::NEGATIVE:
integer_value_ = that.integer_value_;
return;
case Type::INVALID_UTF8:
case Type::BYTE_STRING:
new (&bytestring_value_) BinaryValue(std::move(that.bytestring_value_));
return;
case Type::STRING:
new (&string_value_) std::string(std::move(that.string_value_));
return;
case Type::ARRAY:
new (&array_value_) ArrayValue(std::move(that.array_value_));
return;
case Type::MAP:
new (&map_value_) MapValue(std::move(that.map_value_));
return;
case Type::TAG:
NOTREACHED() << constants::kUnsupportedMajorType;
case Type::SIMPLE_VALUE:
simple_value_ = that.simple_value_;
return;
case Type::FLOAT_VALUE:
float_value_ = that.float_value_;
return;
case Type::NONE:
return;
}
NOTREACHED();
}
void Value::InternalCleanup() {
switch (type_) {
case Type::BYTE_STRING:
case Type::INVALID_UTF8:
bytestring_value_.~BinaryValue();
break;
case Type::STRING:
string_value_.~basic_string();
break;
case Type::ARRAY:
array_value_.~ArrayValue();
break;
case Type::MAP:
map_value_.~MapValue();
break;
case Type::TAG:
NOTREACHED() << constants::kUnsupportedMajorType;
case Type::NONE:
case Type::UNSIGNED:
case Type::NEGATIVE:
case Type::SIMPLE_VALUE:
case Type::FLOAT_VALUE:
break;
}
type_ = Type::NONE;
}
} // namespace cbor
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