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 #include "core/fxcrt/span.h" 14 15 class FileAccessIface { 16 public: 17 static std::unique_ptr<FileAccessIface> Create(); 18 virtual ~FileAccessIface() = default; 19 20 // Opens in read-only mode. `fileName` is UTF-8 on all platforms. 21 virtual bool Open(ByteStringView fileName) = 0; 22 virtual void Close() = 0; 23 virtual FX_FILESIZE GetSize() const = 0; 24 virtual FX_FILESIZE GetPosition() const = 0; 25 virtual FX_FILESIZE SetPosition(FX_FILESIZE pos) = 0; 26 virtual size_t Read(pdfium::span<uint8_t> buffer) = 0; 27 virtual size_t Write(pdfium::span<const uint8_t> buffer) = 0; 28 virtual size_t ReadPos(pdfium::span<uint8_t> buffer, FX_FILESIZE pos) = 0; 29 virtual bool Flush() = 0; 30 virtual bool Truncate(FX_FILESIZE szFile) = 0; 31 }; 32 33 #endif // CORE_FXCRT_FILEACCESS_IFACE_H_ 34