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// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc.
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "core/fxcrt/bytestring.h"
#include "core/fxcrt/fx_memory_wrappers.h"
#include "third_party/base/span.h"
class CFX_BinaryBuf {
CFX_BinaryBuf(CFX_BinaryBuf&& that) noexcept;
virtual ~CFX_BinaryBuf();
// Moved-from value will be left empty.
CFX_BinaryBuf& operator=(CFX_BinaryBuf&& that) noexcept;
pdfium::span<uint8_t> GetSpan();
pdfium::span<const uint8_t> GetSpan() const;
bool IsEmpty() const { return GetLength() == 0; }
size_t GetSize() const { return m_DataSize; } // In bytes.
virtual size_t GetLength() const; // In subclass-specific units.
void Clear();
void SetAllocStep(size_t step) { m_AllocStep = step; }
void EstimateSize(size_t size);
void AppendSpan(pdfium::span<const uint8_t> span);
void AppendBlock(const void* pBuf, size_t size);
void AppendString(const ByteString& str) {
AppendBlock(str.c_str(), str.GetLength());
void AppendByte(uint8_t byte) {
m_pBuffer.get()[m_DataSize++] = byte;
// Releases ownership of |m_pBuffer| and returns it.
std::unique_ptr<uint8_t, FxFreeDeleter> DetachBuffer();
void ExpandBuf(size_t size);
void DeleteBuf(size_t start_index, size_t count);
size_t m_AllocStep = 0;
size_t m_AllocSize = 0;
size_t m_DataSize = 0;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pBuffer;