1 // Copyright 2014 The PDFium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCRT_FILEACCESS_IFACE_H_ 8 #define CORE_FXCRT_FILEACCESS_IFACE_H_ 9 10 #include <memory> 11 12 #include "core/fxcrt/fx_string.h" 13 14 class FileAccessIface { 15 public: 16 static std::unique_ptr<FileAccessIface> Create(); 17 virtual ~FileAccessIface() = default; 18 19 // Opens in read-only mode. `fileName` is UTF-8 on all platforms. 20 virtual bool Open(ByteStringView fileName) = 0; 21 virtual void Close() = 0; 22 virtual FX_FILESIZE GetSize() const = 0; 23 virtual FX_FILESIZE GetPosition() const = 0; 24 virtual FX_FILESIZE SetPosition(FX_FILESIZE pos) = 0; 25 virtual size_t Read(void* pBuffer, size_t szBuffer) = 0; 26 virtual size_t Write(const void* pBuffer, size_t szBuffer) = 0; 27 virtual size_t ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) = 0; 28 virtual size_t WritePos(const void* pBuffer, 29 size_t szBuffer, 30 FX_FILESIZE pos) = 0; 31 virtual bool Flush() = 0; 32 virtual bool Truncate(FX_FILESIZE szFile) = 0; 33 }; 34 35 #endif // CORE_FXCRT_FILEACCESS_IFACE_H_ 36