fgas/ code cleanup.

xfa/fgas/crt/fgas_system.cpp

 // 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 "xfa/fgas/crt/fgas_system.h"
 
 #include <algorithm>
 
@@ skipping 25 matching lines @@
   while (count-- > 0) {
     wch1 = (FX_WCHAR)FX_tolower(*s1++);
     wch2 = (FX_WCHAR)FX_tolower(*s2++);
     if (wch1 != wch2) {
       break;
     }
   }
   return wch1 - wch2;
 }
 
-int32_t FX_filelength(FXSYS_FILE* file) {
-  ASSERT(file != NULL);
-#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_
-  return _filelength(_fileno(file));
-#else
-  int32_t iPos = FXSYS_ftell(file);
-  FXSYS_fseek(file, 0, FXSYS_SEEK_END);
-  int32_t iLen = FXSYS_ftell(file);
-  FXSYS_fseek(file, iPos, FXSYS_SEEK_SET);
-  return iLen;
-#endif
-}
-
-FX_BOOL FX_fsetsize(FXSYS_FILE* file, int32_t size) {
-  ASSERT(file != NULL);
-#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_
-  return _chsize(_fileno(file), size) == 0;
-#elif _FX_OS_ == _FX_WIN32_MOBILE_
-  HANDLE hFile = _fileno(file);
-  uint32_t dwPos = ::SetFilePointer(hFile, 0, 0, FILE_CURRENT);
-  ::SetFilePointer(hFile, size, 0, FILE_BEGIN);
-  FX_BOOL bRet = ::SetEndOfFile(hFile);
-  ::SetFilePointer(hFile, (int32_t)dwPos, 0, FILE_BEGIN);
-  return bRet;
-#else
-  return FALSE;
-#endif
-}
-
 FX_FLOAT FX_wcstof(const FX_WCHAR* pwsStr, int32_t iLength, int32_t* pUsedLen) {
   ASSERT(pwsStr != NULL);
   if (iLength < 0) {
     iLength = FXSYS_wcslen(pwsStr);
   }
   if (iLength == 0) {
     return 0.0f;
   }
   int32_t iUsedLen = 0;
   FX_BOOL bNegtive = FALSE;
@@ skipping 24 matching lines @@
       } else {
         break;
       }
     }
   }
   if (pUsedLen) {
     *pUsedLen = iUsedLen;
   }
   return bNegtive ? -fValue : fValue;
 }