1 /* 2 * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef API_UNITS_DATA_SIZE_H_ 12 #define API_UNITS_DATA_SIZE_H_ 13 14 #ifdef UNIT_TEST 15 #include <ostream> // no-presubmit-check TODO(webrtc:8982) 16 #endif // UNIT_TEST 17 18 #include <string> 19 #include <type_traits> 20 21 #include "rtc_base/units/unit_base.h" 22 23 namespace webrtc { 24 // DataSize is a class represeting a count of bytes. 25 class DataSize final : public rtc_units_impl::RelativeUnit<DataSize> { 26 public: 27 template <typename T> Bytes(T value)28 static constexpr DataSize Bytes(T value) { 29 static_assert(std::is_arithmetic<T>::value, ""); 30 return FromValue(value); 31 } Infinity()32 static constexpr DataSize Infinity() { return PlusInfinity(); } 33 34 DataSize() = delete; 35 36 template <typename T = int64_t> bytes()37 constexpr T bytes() const { 38 return ToValue<T>(); 39 } 40 bytes_or(int64_t fallback_value)41 constexpr int64_t bytes_or(int64_t fallback_value) const { 42 return ToValueOr(fallback_value); 43 } 44 45 private: 46 friend class rtc_units_impl::UnitBase<DataSize>; 47 using RelativeUnit::RelativeUnit; 48 static constexpr bool one_sided = true; 49 }; 50 51 std::string ToString(DataSize value); ToLogString(DataSize value)52inline std::string ToLogString(DataSize value) { 53 return ToString(value); 54 } 55 56 #ifdef UNIT_TEST 57 inline std::ostream& operator<<( // no-presubmit-check TODO(webrtc:8982) 58 std::ostream& stream, // no-presubmit-check TODO(webrtc:8982) 59 DataSize value) { 60 return stream << ToString(value); 61 } 62 #endif // UNIT_TEST 63 64 } // namespace webrtc 65 66 #endif // API_UNITS_DATA_SIZE_H_ 67