core/ difference with XFA (for information only).

core/include/fxcrt/fx_stream.h

 // Copyright 2014 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. http://www.foxitsoftware.com
 
 #ifndef CORE_INCLUDE_FXCRT_FX_STREAM_H_
 #define CORE_INCLUDE_FXCRT_FX_STREAM_H_
 
 #include "fx_string.h"
@@ skipping 109 matching lines @@
                      size_t size) override = 0;
   FX_BOOL WriteBlock(const void* buffer, size_t size) override {
     return WriteBlock(buffer, GetSize(), size);
   }
   FX_BOOL Flush() override = 0;
 };
 
 IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, FX_DWORD dwModes);
 IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename, FX_DWORD dwModes);
 
+#ifdef PDF_ENABLE_XFA
+class IFX_FileAccess {
+ public:
+  virtual ~IFX_FileAccess() {}
+  virtual void Release() = 0;
+  virtual IFX_FileAccess* Retain() = 0;
+  virtual void GetPath(CFX_WideString& wsPath) = 0;
+  virtual IFX_FileStream* CreateFileStream(FX_DWORD dwModes) = 0;
+};
+IFX_FileAccess* FX_CreateDefaultFileAccess(const CFX_WideStringC& wsPath);
+
+#endif
 class IFX_MemoryStream : public IFX_FileStream {
  public:
   virtual FX_BOOL IsConsecutive() const = 0;
 
   virtual void EstimateSize(size_t nInitSize, size_t nGrowSize) = 0;
 
   virtual uint8_t* GetBuffer() const = 0;
 
   virtual void AttachBuffer(uint8_t* pBuffer,
                             size_t nSize,
@@ skipping 13 matching lines @@
   FX_FILESIZE GetPosition() override = 0;
   size_t ReadBlock(void* buffer, size_t size) override = 0;
 
   virtual FX_BOOL ReadNextBlock(FX_BOOL bRestart = FALSE) = 0;
   virtual const uint8_t* GetBlockBuffer() = 0;
   virtual size_t GetBlockSize() = 0;
   virtual FX_FILESIZE GetBlockOffset() = 0;
 };
 
 #endif  // CORE_INCLUDE_FXCRT_FX_STREAM_H_