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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/value_conversions.h"
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#include <stdint.h>
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#include <algorithm>
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#include <string>
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#include <vector>
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#include "base/files/file_path.h"
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#include "base/memory/ptr_util.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/time/time.h"
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#include "base/unguessable_token.h"
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#include "base/values.h"
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namespace base {
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namespace {
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// Helper for serialize/deserialize UnguessableToken.
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union UnguessableTokenRepresentation {
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struct Field {
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uint64_t high;
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uint64_t low;
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} field;
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uint8_t buffer[sizeof(Field)];
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};
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} // namespace
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// |Value| internally stores strings in UTF-8, so we have to convert from the
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// system native code to UTF-8 and back.
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std::unique_ptr<Value> CreateFilePathValue(const FilePath& in_value) {
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return std::make_unique<Value>(in_value.AsUTF8Unsafe());
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}
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bool GetValueAsFilePath(const Value& value, FilePath* file_path) {
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std::string str;
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if (!value.GetAsString(&str))
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return false;
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if (file_path)
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*file_path = FilePath::FromUTF8Unsafe(str);
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return true;
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}
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// |Value| does not support 64-bit integers, and doubles do not have enough
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// precision, so we store the 64-bit time value as a string instead.
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std::unique_ptr<Value> CreateTimeDeltaValue(const TimeDelta& time) {
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std::string string_value = base::Int64ToString(time.ToInternalValue());
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return std::make_unique<Value>(string_value);
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}
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bool GetValueAsTimeDelta(const Value& value, TimeDelta* time) {
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std::string str;
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int64_t int_value;
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if (!value.GetAsString(&str) || !base::StringToInt64(str, &int_value))
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return false;
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if (time)
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*time = TimeDelta::FromInternalValue(int_value);
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return true;
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}
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std::unique_ptr<Value> CreateUnguessableTokenValue(
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const UnguessableToken& token) {
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UnguessableTokenRepresentation representation;
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representation.field.high = token.GetHighForSerialization();
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representation.field.low = token.GetLowForSerialization();
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return std::make_unique<Value>(
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HexEncode(representation.buffer, sizeof(representation.buffer)));
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}
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bool GetValueAsUnguessableToken(const Value& value, UnguessableToken* token) {
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if (!value.is_string()) {
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return false;
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}
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// TODO(dcheng|yucliu): Make a function that accepts non vector variant and
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// reads a fixed number of bytes.
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std::vector<uint8_t> high_low_bytes;
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if (!HexStringToBytes(value.GetString(), &high_low_bytes)) {
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return false;
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}
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UnguessableTokenRepresentation representation;
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if (high_low_bytes.size() != sizeof(representation.buffer)) {
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return false;
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}
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std::copy(high_low_bytes.begin(), high_low_bytes.end(),
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std::begin(representation.buffer));
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*token = UnguessableToken::Deserialize(representation.field.high,
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representation.field.low);
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return true;
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}
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} // namespace base
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