371243dfa3
std::memcpy -> memcpy for instance. This change was motivated by a compile report complaining that std::rand() was used instead of rand(), probably with a stdlib.h include instead of cstdlib. Use of C functions without the std:: prefix is a lot more common, so removing std:: to address this. BUG= R=tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/9559004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5657 4adac7df-926f-26a2-2b94-8c16560cd09d
120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
/*
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* libjingle
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* Copyright 2004-2010, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_BUFFER_H_
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#define TALK_BASE_BUFFER_H_
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#include <string.h>
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#include "talk/base/scoped_ptr.h"
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namespace talk_base {
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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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Construct(NULL, 0, 0);
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}
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Buffer(const void* data, size_t length) {
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Construct(data, length, length);
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}
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Buffer(const void* data, size_t length, size_t capacity) {
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Construct(data, length, capacity);
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}
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Buffer(const Buffer& buf) {
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Construct(buf.data(), buf.length(), buf.length());
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}
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const char* data() const { return data_.get(); }
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char* data() { return data_.get(); }
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// TODO: should this be size(), like STL?
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size_t length() const { return length_; }
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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.length(), buf.length());
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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 (length_ == buf.length() &&
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memcmp(data_.get(), buf.data(), length_) == 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 length) {
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ASSERT(data != NULL || length == 0);
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SetLength(length);
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memcpy(data_.get(), data, length);
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}
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void AppendData(const void* data, size_t length) {
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ASSERT(data != NULL || length == 0);
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size_t old_length = length_;
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SetLength(length_ + length);
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memcpy(data_.get() + old_length, data, length);
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}
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void SetLength(size_t length) {
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SetCapacity(length);
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length_ = length;
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}
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void SetCapacity(size_t capacity) {
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if (capacity > capacity_) {
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talk_base::scoped_ptr<char[]> data(new char[capacity]);
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memcpy(data.get(), data_.get(), length_);
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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->length_ = length_;
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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 length, size_t capacity) {
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data_.reset(new char[capacity_ = capacity]);
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SetData(data, length);
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}
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scoped_ptr<char[]> data_;
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size_t length_;
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size_t capacity_;
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};
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} // namespace talk_base
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#endif // TALK_BASE_BUFFER_H_
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