106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
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// 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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Value CreateFilePathValue(const FilePath& in_value) {
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return 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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// It is recommended in time.h to use ToDeltaSinceWindowsEpoch() and
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// FromDeltaSinceWindowsEpoch() for opaque serialization and
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// deserialization of time values.
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Value CreateTimeValue(const Time& time) {
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return CreateTimeDeltaValue(time.ToDeltaSinceWindowsEpoch());
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}
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bool GetValueAsTime(const Value& value, Time* time) {
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TimeDelta time_delta;
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if (!GetValueAsTimeDelta(value, &time_delta))
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return false;
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if (time)
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*time = Time::FromDeltaSinceWindowsEpoch(time_delta);
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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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Value CreateTimeDeltaValue(const TimeDelta& time_delta) {
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std::string string_value = base::NumberToString(time_delta.InMicroseconds());
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return Value(string_value);
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}
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bool GetValueAsTimeDelta(const Value& value, TimeDelta* time_delta) {
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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_delta)
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*time_delta = TimeDelta::FromMicroseconds(int_value);
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return true;
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}
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Value CreateUnguessableTokenValue(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 Value(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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UnguessableTokenRepresentation representation;
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if (!HexStringToSpan(value.GetString(), representation.buffer)) {
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return false;
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}
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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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