cfx_fileaccess_posix.h

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// Copyright 2014 The PDFium Authors
// 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. http://www.foxitsoftware.com
 
#ifndef CORE_FXCRT_CFX_FILEACCESS_POSIX_H_
#define CORE_FXCRT_CFX_FILEACCESS_POSIX_H_
 
#include <stddef.h>
#include <stdint.h>
 
#include "build/build_config.h"
#include "core/fxcrt/fileaccess_iface.h"
#include "core/fxcrt/fx_types.h"
 
#if !BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_FUCHSIA)
#error "Included on the wrong platform"
#endif
 
class CFX_FileAccess_Posix final : public FileAccessIface {
 public:
  CFX_FileAccess_Posix();
  ~CFX_FileAccess_Posix() override;
 
  // FileAccessIface:
  bool Open(ByteStringView fileName) override;
  void Close() override;
  FX_FILESIZE GetSize() const override;
  FX_FILESIZE GetPosition() const override;
  FX_FILESIZE SetPosition(FX_FILESIZE pos) override;
  size_t Read(void* pBuffer, size_t szBuffer) override;
  size_t Write(const void* pBuffer, size_t szBuffer) override;
  size_t ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) override;
  size_t WritePos(const void* pBuffer,
                  size_t szBuffer,
                  FX_FILESIZE pos) override;
  bool Flush() override;
  bool Truncate(FX_FILESIZE szFile) override;
 
 private:
  int32_t m_nFD = -1;
};
 
#endif  // CORE_FXCRT_CFX_FILEACCESS_POSIX_H_