Remove Release() from IFXCRT_FileAccess.

Remove some unused impls.

Review-Url: https://codereview.chromium.org/1994323002

10 files changed, 28 insertions, 217 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 448fe9d588..6601f21065 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -614,8 +614,6 @@ static_library("fxcrt") {
     "core/fxcrt/fx_unicode.cpp",
     "core/fxcrt/fx_xml_composer.cpp",
     "core/fxcrt/fx_xml_parser.cpp",
-    "core/fxcrt/fxcrt_platforms.cpp",
-    "core/fxcrt/fxcrt_platforms.h",
     "core/fxcrt/fxcrt_posix.cpp",
     "core/fxcrt/fxcrt_posix.h",
     "core/fxcrt/fxcrt_stream.cpp",
diff --git a/core/fxcrt/extension.h b/core/fxcrt/extension.h
index b0e7b9e117..698bded9b6 100644
--- a/core/fxcrt/extension.h
+++ b/core/fxcrt/extension.h
@@ -8,17 +8,19 @@
 #define CORE_FXCRT_EXTENSION_H_
 
 #include <algorithm>
+#include <memory>
 
 #include "core/fxcrt/include/fx_basic.h"
 #include "core/fxcrt/include/fx_safe_types.h"
 
 class IFXCRT_FileAccess {
  public:
+  static IFXCRT_FileAccess* Create();
   virtual ~IFXCRT_FileAccess() {}
+
   virtual FX_BOOL Open(const CFX_ByteStringC& fileName, uint32_t dwMode) = 0;
   virtual FX_BOOL Open(const CFX_WideStringC& fileName, uint32_t dwMode) = 0;
   virtual void Close() = 0;
-  virtual void Release() = 0;
   virtual FX_FILESIZE GetSize() const = 0;
   virtual FX_FILESIZE GetPosition() const = 0;
   virtual FX_FILESIZE SetPosition(FX_FILESIZE pos) = 0;
@@ -31,7 +33,6 @@ class IFXCRT_FileAccess {
   virtual FX_BOOL Flush() = 0;
   virtual FX_BOOL Truncate(FX_FILESIZE szFile) = 0;
 };
-IFXCRT_FileAccess* FXCRT_FileAccess_Create();
 
 #ifdef PDF_ENABLE_XFA
 class CFX_CRTFileAccess : public IFX_FileAccess {
@@ -69,7 +70,7 @@ class CFX_CRTFileAccess : public IFX_FileAccess {
 
 class CFX_CRTFileStream final : public IFX_FileStream {
  public:
-  explicit CFX_CRTFileStream(IFXCRT_FileAccess* pFA);
+  explicit CFX_CRTFileStream(std::unique_ptr<IFXCRT_FileAccess> pFA);
   ~CFX_CRTFileStream() override;
 
   // IFX_FileStream:
@@ -86,7 +87,7 @@ class CFX_CRTFileStream final : public IFX_FileStream {
   FX_BOOL Flush() override;
 
  protected:
-  IFXCRT_FileAccess* m_pFile;
+  std::unique_ptr<IFXCRT_FileAccess> m_pFile;
   uint32_t m_dwCount;
 };
 
diff --git a/core/fxcrt/fx_extension.cpp b/core/fxcrt/fx_extension.cpp
index 1dddf09fd6..197022362f 100644
--- a/core/fxcrt/fx_extension.cpp
+++ b/core/fxcrt/fx_extension.cpp
@@ -4,6 +4,8 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include <utility>
+
 #include "core/fxcrt/extension.h"
 #include "core/fxcrt/include/fx_basic.h"
 #include "core/fxcrt/include/fx_ext.h"
@@ -14,14 +16,10 @@
 #include <ctime>
 #endif
 
-CFX_CRTFileStream::CFX_CRTFileStream(IFXCRT_FileAccess* pFA)
-    : m_pFile(pFA), m_dwCount(1) {}
+CFX_CRTFileStream::CFX_CRTFileStream(std::unique_ptr<IFXCRT_FileAccess> pFA)
+    : m_pFile(std::move(pFA)), m_dwCount(1) {}
 
-CFX_CRTFileStream::~CFX_CRTFileStream() {
-  if (m_pFile) {
-    m_pFile->Release();
-  }
-}
+CFX_CRTFileStream::~CFX_CRTFileStream() {}
 
 IFX_FileStream* CFX_CRTFileStream::Retain() {
   m_dwCount++;
@@ -83,27 +81,18 @@ IFX_FileAccess* FX_CreateDefaultFileAccess(const CFX_WideStringC& wsPath) {
 #endif  // PDF_ENABLE_XFA
 
 IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, uint32_t dwModes) {
-  IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
-  if (!pFA) {
-    return NULL;
-  }
-  if (!pFA->Open(filename, dwModes)) {
-    pFA->Release();
-    return NULL;
-  }
-  return new CFX_CRTFileStream(pFA);
+  std::unique_ptr<IFXCRT_FileAccess> pFA(IFXCRT_FileAccess::Create());
+  if (!pFA->Open(filename, dwModes))
+    return nullptr;
+  return new CFX_CRTFileStream(std::move(pFA));
 }
+
 IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename,
                                     uint32_t dwModes) {
-  IFXCRT_FileAccess* pFA = FXCRT_FileAccess_Create();
-  if (!pFA) {
-    return NULL;
-  }
-  if (!pFA->Open(filename, dwModes)) {
-    pFA->Release();
-    return NULL;
-  }
-  return new CFX_CRTFileStream(pFA);
+  std::unique_ptr<IFXCRT_FileAccess> pFA(IFXCRT_FileAccess::Create());
+  if (!pFA->Open(filename, dwModes))
+    return nullptr;
+  return new CFX_CRTFileStream(std::move(pFA));
 }
 IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename) {
   return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
diff --git a/core/fxcrt/fxcrt_platforms.cpp b/core/fxcrt/fxcrt_platforms.cpp
deleted file mode 100644
index 8f134c751d..0000000000
--- a/core/fxcrt/fxcrt_platforms.cpp
+++ /dev/null
@@ -1,132 +0,0 @@
-// 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
-
-#include "core/fxcrt/fxcrt_platforms.h"
-
-#include "core/fxcrt/include/fx_basic.h"
-
-#if (_FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ && \
-     _FXM_PLATFORM_ != _FXM_PLATFORM_LINUX_ &&   \
-     _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ &&   \
-     _FXM_PLATFORM_ != _FXM_PLATFORM_ANDROID_)
-IFXCRT_FileAccess* FXCRT_FileAccess_Create() {
-  return new CFXCRT_FileAccess_CRT;
-}
-void FXCRT_GetFileModeString(uint32_t dwModes, CFX_ByteString& bsMode) {
-  if (dwModes & FX_FILEMODE_ReadOnly) {
-    bsMode = "rb";
-  } else if (dwModes & FX_FILEMODE_Truncate) {
-    bsMode = "w+b";
-  } else {
-    bsMode = "a+b";
-  }
-}
-void FXCRT_GetFileModeString(uint32_t dwModes, CFX_WideString& wsMode) {
-  if (dwModes & FX_FILEMODE_ReadOnly) {
-    wsMode = FX_WSTRC(L"rb");
-  } else if (dwModes & FX_FILEMODE_Truncate) {
-    wsMode = FX_WSTRC(L"w+b");
-  } else {
-    wsMode = FX_WSTRC(L"a+b");
-  }
-}
-CFXCRT_FileAccess_CRT::CFXCRT_FileAccess_CRT() : m_hFile(NULL) {}
-CFXCRT_FileAccess_CRT::~CFXCRT_FileAccess_CRT() {
-  Close();
-}
-FX_BOOL CFXCRT_FileAccess_CRT::Open(const CFX_ByteStringC& fileName,
-                                    uint32_t dwMode) {
-  if (m_hFile) {
-    return FALSE;
-  }
-  CFX_ByteString strMode;
-  FXCRT_GetFileModeString(dwMode, strMode);
-  m_hFile = FXSYS_fopen(fileName.c_str(), strMode.c_str());
-  return m_hFile != NULL;
-}
-FX_BOOL CFXCRT_FileAccess_CRT::Open(const CFX_WideStringC& fileName,
-                                    uint32_t dwMode) {
-  if (m_hFile) {
-    return FALSE;
-  }
-  CFX_WideString strMode;
-  FXCRT_GetFileModeString(dwMode, strMode);
-  m_hFile = FXSYS_wfopen(fileName.raw_str(), strMode.c_str());
-  return m_hFile != NULL;
-}
-void CFXCRT_FileAccess_CRT::Close() {
-  if (!m_hFile) {
-    return;
-  }
-  FXSYS_fclose(m_hFile);
-  m_hFile = NULL;
-}
-void CFXCRT_FileAccess_CRT::Release() {
-  delete this;
-}
-FX_FILESIZE CFXCRT_FileAccess_CRT::GetSize() const {
-  if (!m_hFile) {
-    return 0;
-  }
-  FX_FILESIZE pos = (FX_FILESIZE)FXSYS_ftell(m_hFile);
-  FXSYS_fseek(m_hFile, 0, FXSYS_SEEK_END);
-  FX_FILESIZE size = (FX_FILESIZE)FXSYS_ftell(m_hFile);
-  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
-  return size;
-}
-FX_FILESIZE CFXCRT_FileAccess_CRT::GetPosition() const {
-  if (!m_hFile) {
-    return (FX_FILESIZE)-1;
-  }
-  return (FX_FILESIZE)FXSYS_ftell(m_hFile);
-}
-FX_FILESIZE CFXCRT_FileAccess_CRT::SetPosition(FX_FILESIZE pos) {
-  if (!m_hFile) {
-    return (FX_FILESIZE)-1;
-  }
-  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
-  return (FX_FILESIZE)FXSYS_ftell(m_hFile);
-}
-size_t CFXCRT_FileAccess_CRT::Read(void* pBuffer, size_t szBuffer) {
-  if (!m_hFile) {
-    return 0;
-  }
-  return FXSYS_fread(pBuffer, 1, szBuffer, m_hFile);
-}
-size_t CFXCRT_FileAccess_CRT::Write(const void* pBuffer, size_t szBuffer) {
-  if (!m_hFile) {
-    return 0;
-  }
-  return FXSYS_fwrite(pBuffer, 1, szBuffer, m_hFile);
-}
-size_t CFXCRT_FileAccess_CRT::ReadPos(void* pBuffer,
-                                      size_t szBuffer,
-                                      FX_FILESIZE pos) {
-  if (!m_hFile) {
-    return (FX_FILESIZE)-1;
-  }
-  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
-  return FXSYS_fread(pBuffer, 1, szBuffer, m_hFile);
-}
-size_t CFXCRT_FileAccess_CRT::WritePos(const void* pBuffer,
-                                       size_t szBuffer,
-                                       FX_FILESIZE pos) {
-  if (!m_hFile) {
-    return (FX_FILESIZE)-1;
-  }
-  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
-  return FXSYS_fwrite(pBuffer, 1, szBuffer, m_hFile);
-}
-FX_BOOL CFXCRT_FileAccess_CRT::Flush() {
-  if (!m_hFile) {
-    return FALSE;
-  }
-  return !FXSYS_fflush(m_hFile);
-}
-FX_BOOL CFXCRT_FileAccess_CRT::Truncate(FX_FILESIZE szFile) {
-  return FALSE;
-}
-#endif
diff --git a/core/fxcrt/fxcrt_platforms.h b/core/fxcrt/fxcrt_platforms.h
deleted file mode 100644
index 736c116625..0000000000
--- a/core/fxcrt/fxcrt_platforms.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// 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_FXCRT_FXCRT_PLATFORMS_H_
-#define CORE_FXCRT_FXCRT_PLATFORMS_H_
-
-#include "core/fxcrt/extension.h"
-
-#if _FX_OS_ == _FX_ANDROID_
-void FXCRT_GetFileModeString(uint32_t dwModes, CFX_ByteString& bsMode);
-void FXCRT_GetFileModeString(uint32_t dwModes, CFX_WideString& wsMode);
-class CFXCRT_FileAccess_CRT : public IFXCRT_FileAccess {
- public:
-  CFXCRT_FileAccess_CRT();
-  ~CFXCRT_FileAccess_CRT() override;
-
-  // IFXCRT_FileAccess
-  FX_BOOL Open(const CFX_ByteStringC& fileName, uint32_t dwMode) override;
-  FX_BOOL Open(const CFX_WideStringC& fileName, uint32_t dwMode) override;
-  void Close() override;
-  void Release() 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;
-  FX_BOOL Flush() override;
-  FX_BOOL Truncate(FX_FILESIZE szFile) override;
-
- protected:
-  FXSYS_FILE* m_hFile;
-};
-#endif
-
-#endif  // CORE_FXCRT_FXCRT_PLATFORMS_H_
diff --git a/core/fxcrt/fxcrt_posix.cpp b/core/fxcrt/fxcrt_posix.cpp
index 9237acef6b..053f89c2c9 100644
--- a/core/fxcrt/fxcrt_posix.cpp
+++ b/core/fxcrt/fxcrt_posix.cpp
@@ -11,9 +11,12 @@
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \
     _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \
     _FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_
-IFXCRT_FileAccess* FXCRT_FileAccess_Create() {
+
+// static
+IFXCRT_FileAccess* IFXCRT_FileAccess::Create() {
   return new CFXCRT_FileAccess_Posix;
 }
+
 void FXCRT_Posix_GetFileMode(uint32_t dwModes,
                              int32_t& nFlags,
                              int32_t& nMasks) {
@@ -54,9 +57,6 @@ void CFXCRT_FileAccess_Posix::Close() {
   close(m_nFD);
   m_nFD = -1;
 }
-void CFXCRT_FileAccess_Posix::Release() {
-  delete this;
-}
 FX_FILESIZE CFXCRT_FileAccess_Posix::GetSize() const {
   if (m_nFD < 0) {
     return 0;
@@ -127,4 +127,5 @@ FX_BOOL CFXCRT_FileAccess_Posix::Truncate(FX_FILESIZE szFile) {
   }
   return !ftruncate(m_nFD, szFile);
 }
+
 #endif
diff --git a/core/fxcrt/fxcrt_posix.h b/core/fxcrt/fxcrt_posix.h
index 969707a7b9..37f6548d40 100644
--- a/core/fxcrt/fxcrt_posix.h
+++ b/core/fxcrt/fxcrt_posix.h
@@ -21,7 +21,6 @@ class CFXCRT_FileAccess_Posix : public IFXCRT_FileAccess {
   FX_BOOL Open(const CFX_ByteStringC& fileName, uint32_t dwMode) override;
   FX_BOOL Open(const CFX_WideStringC& fileName, uint32_t dwMode) override;
   void Close() override;
-  void Release() override;
   FX_FILESIZE GetSize() const override;
   FX_FILESIZE GetPosition() const override;
   FX_FILESIZE SetPosition(FX_FILESIZE pos) override;
diff --git a/core/fxcrt/fxcrt_windows.cpp b/core/fxcrt/fxcrt_windows.cpp
index eb584ca804..d4b4e50c2c 100644
--- a/core/fxcrt/fxcrt_windows.cpp
+++ b/core/fxcrt/fxcrt_windows.cpp
@@ -9,9 +9,12 @@
 #include "core/fxcrt/include/fx_string.h"
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
-IFXCRT_FileAccess* FXCRT_FileAccess_Create() {
+
+// static
+IFXCRT_FileAccess* IFXCRT_FileAccess::Create() {
   return new CFXCRT_FileAccess_Win64;
 }
+
 void FXCRT_Windows_GetFileMode(uint32_t dwMode,
                                uint32_t& dwAccess,
                                uint32_t& dwShare,
@@ -75,9 +78,6 @@ void CFXCRT_FileAccess_Win64::Close() {
   ::CloseHandle(m_hFile);
   m_hFile = NULL;
 }
-void CFXCRT_FileAccess_Win64::Release() {
-  delete this;
-}
 FX_FILESIZE CFXCRT_FileAccess_Win64::GetSize() const {
   if (!m_hFile) {
     return 0;
diff --git a/core/fxcrt/fxcrt_windows.h b/core/fxcrt/fxcrt_windows.h
index 7444446d45..19cef0adc2 100644
--- a/core/fxcrt/fxcrt_windows.h
+++ b/core/fxcrt/fxcrt_windows.h
@@ -19,7 +19,6 @@ class CFXCRT_FileAccess_Win64 : public IFXCRT_FileAccess {
   FX_BOOL Open(const CFX_ByteStringC& fileName, uint32_t dwMode) override;
   FX_BOOL Open(const CFX_WideStringC& fileName, uint32_t dwMode) override;
   void Close() override;
-  void Release() override;
   FX_FILESIZE GetSize() const override;
   FX_FILESIZE GetPosition() const override;
   FX_FILESIZE SetPosition(FX_FILESIZE pos) override;
diff --git a/pdfium.gyp b/pdfium.gyp
index fa0ab01cd6..d9e1cfb8f7 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -627,8 +627,6 @@
         'core/fxcrt/fx_unicode.cpp',
         'core/fxcrt/fx_xml_composer.cpp',
         'core/fxcrt/fx_xml_parser.cpp',
-        'core/fxcrt/fxcrt_platforms.cpp',
-        'core/fxcrt/fxcrt_platforms.h',
         'core/fxcrt/fxcrt_posix.cpp',
         'core/fxcrt/fxcrt_posix.h',
         'core/fxcrt/fxcrt_stream.cpp',