text: /*
    ==============================================================================
  
     This file is part of the JUCE library - "Jules' Utility Class Extensions"
     Copyright 2004-11 by Raw Material Software Ltd.
  
    ------------------------------------------------------------------------------
  
     JUCE can be redistributed and/or modified under the terms of the GNU General
     Public License (Version 2), as published by the Free Software Foundation.
     A copy of the license is included in the JUCE distribution, or can be found
     online at www.gnu.org/licenses.
  
     JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  
    ------------------------------------------------------------------------------
  
     To release a closed-source product which uses JUCE, commercial licenses are
     available: visit www.rawmaterialsoftware.com/juce for more information.
  
    ==============================================================================
  */
  
  int64 juce_fileSetPosition (void* handle, int64 pos);
  
  //==============================================================================
  FileInputStream::FileInputStream (const File& f)
      : file (f),
        fileHandle (nullptr),
        currentPosition (0),
        status (Result::ok()),
        needToSeek (true)
  {
      openHandle();
  }
  
  FileInputStream::~FileInputStream()
  {
      closeHandle();
  }
  
  //==============================================================================
  int64 FileInputStream::getTotalLength()
  {
      return file.getSize();
  }
  
  int FileInputStream::read (void* buffer, int bytesToRead)
  {
      jassert (openedOk());
      jassert (buffer != nullptr && bytesToRead >= 0);
  
      if (needToSeek)
      {
          if (juce_fileSetPosition (fileHandle, currentPosition) < 0)
              return 0;
  
          needToSeek = false;
      }
  
      const size_t num = readInternal (buffer, (size_t) bytesToRead);
      currentPosition += num;
  
      return (int) num;
  }
  
  bool FileInputStream::isExhausted()
  {
      return currentPosition >= getTotalLength();
  }
  
  int64 FileInputStream::getPosition()
  {
      return currentPosition;
  }
  
  bool FileInputStream::setPosition (int64 pos)
  {
      jassert (openedOk());
  
      if (pos != currentPosition)
      {
          pos = jlimit ((int64) 0, getTotalLength(), pos);
  
          needToSeek |= (currentPosition != pos);
          currentPosition = pos;
      }
  
      return true;
  }
  