f048872e91
migrating talk/base to webrtc/base. BUG=N/A R=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/17479005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6129 4adac7df-926f-26a2-2b94-8c16560cd09d
103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
|
|
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef WEBRTC_BASE_BUFFER_H_
|
|
#define WEBRTC_BASE_BUFFER_H_
|
|
|
|
#include <string.h>
|
|
|
|
#include "webrtc/base/scoped_ptr.h"
|
|
|
|
namespace rtc {
|
|
|
|
// Basic buffer class, can be grown and shrunk dynamically.
|
|
// Unlike std::string/vector, does not initialize data when expanding capacity.
|
|
class Buffer {
|
|
public:
|
|
Buffer() {
|
|
Construct(NULL, 0, 0);
|
|
}
|
|
Buffer(const void* data, size_t length) {
|
|
Construct(data, length, length);
|
|
}
|
|
Buffer(const void* data, size_t length, size_t capacity) {
|
|
Construct(data, length, capacity);
|
|
}
|
|
Buffer(const Buffer& buf) {
|
|
Construct(buf.data(), buf.length(), buf.length());
|
|
}
|
|
|
|
const char* data() const { return data_.get(); }
|
|
char* data() { return data_.get(); }
|
|
// TODO: should this be size(), like STL?
|
|
size_t length() const { return length_; }
|
|
size_t capacity() const { return capacity_; }
|
|
|
|
Buffer& operator=(const Buffer& buf) {
|
|
if (&buf != this) {
|
|
Construct(buf.data(), buf.length(), buf.length());
|
|
}
|
|
return *this;
|
|
}
|
|
bool operator==(const Buffer& buf) const {
|
|
return (length_ == buf.length() &&
|
|
memcmp(data_.get(), buf.data(), length_) == 0);
|
|
}
|
|
bool operator!=(const Buffer& buf) const {
|
|
return !operator==(buf);
|
|
}
|
|
|
|
void SetData(const void* data, size_t length) {
|
|
ASSERT(data != NULL || length == 0);
|
|
SetLength(length);
|
|
memcpy(data_.get(), data, length);
|
|
}
|
|
void AppendData(const void* data, size_t length) {
|
|
ASSERT(data != NULL || length == 0);
|
|
size_t old_length = length_;
|
|
SetLength(length_ + length);
|
|
memcpy(data_.get() + old_length, data, length);
|
|
}
|
|
void SetLength(size_t length) {
|
|
SetCapacity(length);
|
|
length_ = length;
|
|
}
|
|
void SetCapacity(size_t capacity) {
|
|
if (capacity > capacity_) {
|
|
rtc::scoped_ptr<char[]> data(new char[capacity]);
|
|
memcpy(data.get(), data_.get(), length_);
|
|
data_.swap(data);
|
|
capacity_ = capacity;
|
|
}
|
|
}
|
|
|
|
void TransferTo(Buffer* buf) {
|
|
ASSERT(buf != NULL);
|
|
buf->data_.reset(data_.release());
|
|
buf->length_ = length_;
|
|
buf->capacity_ = capacity_;
|
|
Construct(NULL, 0, 0);
|
|
}
|
|
|
|
protected:
|
|
void Construct(const void* data, size_t length, size_t capacity) {
|
|
data_.reset(new char[capacity_ = capacity]);
|
|
SetData(data, length);
|
|
}
|
|
|
|
scoped_ptr<char[]> data_;
|
|
size_t length_;
|
|
size_t capacity_;
|
|
};
|
|
|
|
} // namespace rtc
|
|
|
|
#endif // WEBRTC_BASE_BUFFER_H_
|