Repo created

TMessagesProj/jni/voip/webrtc/base/value_conversions.cc

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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/value_conversions.h"
+
+#include <stdint.h>
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+#include "base/files/file_path.h"
+#include "base/memory/ptr_util.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/time/time.h"
+#include "base/unguessable_token.h"
+#include "base/values.h"
+
+namespace base {
+namespace {
+// Helper for serialize/deserialize UnguessableToken.
+union UnguessableTokenRepresentation {
+  struct Field {
+    uint64_t high;
+    uint64_t low;
+  } field;
+
+  uint8_t buffer[sizeof(Field)];
+};
+}  // namespace
+
+// |Value| internally stores strings in UTF-8, so we have to convert from the
+// system native code to UTF-8 and back.
+Value CreateFilePathValue(const FilePath& in_value) {
+  return Value(in_value.AsUTF8Unsafe());
+}
+
+bool GetValueAsFilePath(const Value& value, FilePath* file_path) {
+  std::string str;
+  if (!value.GetAsString(&str))
+    return false;
+  if (file_path)
+    *file_path = FilePath::FromUTF8Unsafe(str);
+  return true;
+}
+
+// It is recommended in time.h to use ToDeltaSinceWindowsEpoch() and
+// FromDeltaSinceWindowsEpoch() for opaque serialization and
+// deserialization of time values.
+Value CreateTimeValue(const Time& time) {
+  return CreateTimeDeltaValue(time.ToDeltaSinceWindowsEpoch());
+}
+
+bool GetValueAsTime(const Value& value, Time* time) {
+  TimeDelta time_delta;
+  if (!GetValueAsTimeDelta(value, &time_delta))
+    return false;
+
+  if (time)
+    *time = Time::FromDeltaSinceWindowsEpoch(time_delta);
+  return true;
+}
+
+// |Value| does not support 64-bit integers, and doubles do not have enough
+// precision, so we store the 64-bit time value as a string instead.
+Value CreateTimeDeltaValue(const TimeDelta& time_delta) {
+  std::string string_value = base::NumberToString(time_delta.InMicroseconds());
+  return Value(string_value);
+}
+
+bool GetValueAsTimeDelta(const Value& value, TimeDelta* time_delta) {
+  std::string str;
+  int64_t int_value;
+  if (!value.GetAsString(&str) || !base::StringToInt64(str, &int_value))
+    return false;
+  if (time_delta)
+    *time_delta = TimeDelta::FromMicroseconds(int_value);
+  return true;
+}
+
+Value CreateUnguessableTokenValue(const UnguessableToken& token) {
+  UnguessableTokenRepresentation representation;
+  representation.field.high = token.GetHighForSerialization();
+  representation.field.low = token.GetLowForSerialization();
+
+  return Value(HexEncode(representation.buffer, sizeof(representation.buffer)));
+}
+
+bool GetValueAsUnguessableToken(const Value& value, UnguessableToken* token) {
+  if (!value.is_string()) {
+    return false;
+  }
+
+  UnguessableTokenRepresentation representation;
+  if (!HexStringToSpan(value.GetString(), representation.buffer)) {
+    return false;
+  }
+
+  *token = UnguessableToken::Deserialize(representation.field.high,
+                                         representation.field.low);
+  return true;
+}
+
+}  // namespace base