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1 /* | 1 /* |
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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42 using t = decltype(F(static_cast<T*>(nullptr))); | 42 using t = decltype(F(static_cast<T*>(nullptr))); |
43 }; | 43 }; |
44 | 44 |
45 } // namespace internal | 45 } // namespace internal |
46 | 46 |
47 // Basic buffer class, can be grown and shrunk dynamically. | 47 // Basic buffer class, can be grown and shrunk dynamically. |
48 // Unlike std::string/vector, does not initialize data when expanding capacity. | 48 // Unlike std::string/vector, does not initialize data when expanding capacity. |
49 class Buffer { | 49 class Buffer { |
50 public: | 50 public: |
51 Buffer(); // An empty buffer. | 51 Buffer(); // An empty buffer. |
52 Buffer(const Buffer& buf); // Copy size and contents of an existing buffer. | |
53 Buffer(Buffer&& buf); // Move contents from an existing buffer. | 52 Buffer(Buffer&& buf); // Move contents from an existing buffer. |
54 | 53 |
55 // Construct a buffer with the specified number of uninitialized bytes. | 54 // Construct a buffer with the specified number of uninitialized bytes. |
56 explicit Buffer(size_t size); | 55 explicit Buffer(size_t size); |
57 Buffer(size_t size, size_t capacity); | 56 Buffer(size_t size, size_t capacity); |
58 | 57 |
59 // Construct a buffer and copy the specified number of bytes into it. The | 58 // Construct a buffer and copy the specified number of bytes into it. The |
60 // source array may be (const) uint8_t*, int8_t*, or char*. | 59 // source array may be (const) uint8_t*, int8_t*, or char*. |
61 template <typename T, typename internal::ByteType<T>::t = 0> | 60 template <typename T, typename internal::ByteType<T>::t = 0> |
62 Buffer(const T* data, size_t size) | 61 Buffer(const T* data, size_t size) |
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92 size_t size() const { | 91 size_t size() const { |
93 RTC_DCHECK(IsConsistent()); | 92 RTC_DCHECK(IsConsistent()); |
94 return size_; | 93 return size_; |
95 } | 94 } |
96 | 95 |
97 size_t capacity() const { | 96 size_t capacity() const { |
98 RTC_DCHECK(IsConsistent()); | 97 RTC_DCHECK(IsConsistent()); |
99 return capacity_; | 98 return capacity_; |
100 } | 99 } |
101 | 100 |
102 Buffer& operator=(const Buffer& buf) { | |
103 if (&buf != this) | |
104 SetData(buf.data(), buf.size()); | |
105 return *this; | |
106 } | |
107 | |
108 Buffer& operator=(Buffer&& buf) { | 101 Buffer& operator=(Buffer&& buf) { |
109 RTC_DCHECK(IsConsistent()); | 102 RTC_DCHECK(IsConsistent()); |
110 RTC_DCHECK(buf.IsConsistent()); | 103 RTC_DCHECK(buf.IsConsistent()); |
111 size_ = buf.size_; | 104 size_ = buf.size_; |
112 capacity_ = buf.capacity_; | 105 capacity_ = buf.capacity_; |
113 data_ = std::move(buf.data_); | 106 data_ = std::move(buf.data_); |
114 buf.OnMovedFrom(); | 107 buf.OnMovedFrom(); |
115 return *this; | 108 return *this; |
116 } | 109 } |
117 | 110 |
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263 #else | 256 #else |
264 // Ensure that *this is always inconsistent, to provoke bugs. | 257 // Ensure that *this is always inconsistent, to provoke bugs. |
265 size_ = 1; | 258 size_ = 1; |
266 capacity_ = 0; | 259 capacity_ = 0; |
267 #endif | 260 #endif |
268 } | 261 } |
269 | 262 |
270 size_t size_; | 263 size_t size_; |
271 size_t capacity_; | 264 size_t capacity_; |
272 std::unique_ptr<uint8_t[]> data_; | 265 std::unique_ptr<uint8_t[]> data_; |
| 266 |
| 267 RTC_DISALLOW_COPY_AND_ASSIGN(Buffer); |
273 }; | 268 }; |
274 | 269 |
275 } // namespace rtc | 270 } // namespace rtc |
276 | 271 |
277 #endif // WEBRTC_BASE_BUFFER_H_ | 272 #endif // WEBRTC_BASE_BUFFER_H_ |
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