Rename fgas_stream to ifgas_stream

This Cl renames the the fgas_stream files to match the internal
ifgas_stream class. The majority of the code in ifgas_stream.cpp is
moved into the anonymouse namespace.

Change-Id: I0518103d61df077782d9ab26d0ac87485417f379
Reviewed-on: https://pdfium-review.googlesource.com/3370
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/xfa/fgas/crt/ifgas_stream.h b/xfa/fgas/crt/ifgas_stream.h
new file mode 100644
index 0000000000..3ffead96dd
--- /dev/null
+++ b/xfa/fgas/crt/ifgas_stream.h
@@ -0,0 +1,66 @@
+// 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 XFA_FGAS_CRT_IFGAS_STREAM_H_
+#define XFA_FGAS_CRT_IFGAS_STREAM_H_
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/fx_stream.h"
+#include "core/fxcrt/fx_system.h"
+
+enum FX_STREAMACCESS {
+  FX_STREAMACCESS_Binary = 0x00,
+  FX_STREAMACCESS_Text = 0x01,
+  FX_STREAMACCESS_Read = 0x02,
+  FX_STREAMACCESS_Write = 0x04,
+  FX_STREAMACCESS_Truncate = 0x10,
+  FX_STREAMACCESS_Append = 0x20,
+  FX_STREAMACCESS_Create = 0x80,
+};
+
+enum FX_STREAMSEEK {
+  FX_STREAMSEEK_Begin = 0,
+  FX_STREAMSEEK_Current,
+  FX_STREAMSEEK_End,
+};
+
+class IFGAS_Stream : public CFX_Retainable {
+ public:
+  static CFX_RetainPtr<IFGAS_Stream> CreateStream(
+      const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead,
+      uint32_t dwAccess);
+  static CFX_RetainPtr<IFGAS_Stream> CreateStream(
+      const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite,
+      uint32_t dwAccess);
+  static CFX_RetainPtr<IFGAS_Stream> CreateStream(uint8_t* pData,
+                                                  int32_t length,
+                                                  uint32_t dwAccess);
+  static CFX_RetainPtr<IFGAS_Stream> CreateTextStream(
+      const CFX_RetainPtr<IFGAS_Stream>& pBaseStream);
+
+  virtual CFX_RetainPtr<IFGAS_Stream> CreateSharedStream(uint32_t dwAccess,
+                                                         int32_t iOffset,
+                                                         int32_t iLength) = 0;
+
+  virtual uint32_t GetAccessModes() const = 0;
+  virtual int32_t GetLength() const = 0;
+  virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) = 0;
+  virtual int32_t GetPosition() = 0;
+  virtual bool IsEOF() const = 0;
+  virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) = 0;
+  virtual int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) = 0;
+  virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) = 0;
+  virtual int32_t WriteString(const wchar_t* pStr, int32_t iLength) = 0;
+  virtual void Flush() = 0;
+  virtual bool SetLength(int32_t iLength) = 0;
+  virtual int32_t GetBOM(uint8_t bom[4]) const = 0;
+  virtual uint16_t GetCodePage() const = 0;
+  virtual uint16_t SetCodePage(uint16_t wCodePage) = 0;
+
+  CFX_RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream();
+};
+
+#endif  // XFA_FGAS_CRT_IFGAS_STREAM_H_