gecko-dev/media/mtransport/databuffer.h

51 строка
1.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
// Original author: ekr@rtfm.com
#ifndef databuffer_h__
#define databuffer_h__
#include <algorithm>
#include <mozilla/UniquePtr.h>
#include <m_cpp_utils.h>
#include <nsISupportsImpl.h>
namespace mozilla {
class DataBuffer {
public:
DataBuffer() : data_(nullptr), len_(0) {}
DataBuffer(const uint8_t *data, size_t len) {
Assign(data, len);
}
void Assign(const uint8_t *data, size_t len) {
Allocate(len);
memcpy(static_cast<void *>(data_.get()),
static_cast<const void *>(data), len);
}
void Allocate(size_t len) {
data_.reset(new uint8_t[len ? len : 1]); // Don't depend on new [0].
len_ = len;
}
const uint8_t *data() const { return data_.get(); }
uint8_t *data() { return data_.get(); }
size_t len() const { return len_; }
const bool empty() const { return len_ != 0; }
private:
UniquePtr<uint8_t[]> data_;
size_t len_;
DISALLOW_COPY_ASSIGN(DataBuffer);
};
}
#endif