eebcab5ce9
And add a constructor for creating an uninitialized Buffer of a specified size. (I intend to follow up with more Buffer changes, but since it's rather widely used, the rename is quite noisy and works better as a separate CL.) R=tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/48579004 Cr-Commit-Position: refs/heads/master@{#8841} git-svn-id: http://webrtc.googlecode.com/svn/trunk@8841 4adac7df-926f-26a2-2b94-8c16560cd09d
96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_BASE_BUFFER_H_
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#define WEBRTC_BASE_BUFFER_H_
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#include <string.h>
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#include "webrtc/base/common.h"
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#include "webrtc/base/scoped_ptr.h"
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namespace rtc {
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// Basic buffer class, can be grown and shrunk dynamically.
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// Unlike std::string/vector, does not initialize data when expanding capacity.
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class Buffer {
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public:
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Buffer();
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explicit Buffer(size_t size);
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Buffer(const void* data, size_t size);
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Buffer(const void* data, size_t size, size_t capacity);
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Buffer(const Buffer& buf);
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~Buffer();
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const char* data() const { return data_.get(); }
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char* data() { return data_.get(); }
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size_t size() const { return size_; }
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size_t capacity() const { return capacity_; }
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Buffer& operator=(const Buffer& buf) {
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if (&buf != this) {
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Construct(buf.data(), buf.size(), buf.size());
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}
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return *this;
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}
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bool operator==(const Buffer& buf) const {
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return (size_ == buf.size() && memcmp(data_.get(), buf.data(), size_) == 0);
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}
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bool operator!=(const Buffer& buf) const {
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return !operator==(buf);
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}
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void SetData(const void* data, size_t size) {
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ASSERT(data != NULL || size == 0);
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SetSize(size);
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memcpy(data_.get(), data, size);
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}
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void AppendData(const void* data, size_t size) {
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ASSERT(data != NULL || size == 0);
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size_t old_size = size_;
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SetSize(size_ + size);
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memcpy(data_.get() + old_size, data, size);
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}
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void SetSize(size_t size) {
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SetCapacity(size);
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size_ = size;
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}
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void SetCapacity(size_t capacity) {
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if (capacity > capacity_) {
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rtc::scoped_ptr<char[]> data(new char[capacity]);
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memcpy(data.get(), data_.get(), size_);
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data_.swap(data);
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capacity_ = capacity;
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}
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}
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void TransferTo(Buffer* buf) {
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ASSERT(buf != NULL);
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buf->data_.reset(data_.release());
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buf->size_ = size_;
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buf->capacity_ = capacity_;
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Construct(NULL, 0, 0);
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}
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protected:
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void Construct(const void* data, size_t size, size_t capacity) {
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data_.reset(new char[capacity_ = capacity]);
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SetData(data, size);
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}
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scoped_ptr<char[]> data_;
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size_t size_;
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size_t capacity_;
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};
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} // namespace rtc
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#endif // WEBRTC_BASE_BUFFER_H_
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