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stdiostream.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-2-0/backends/fs/stdiostream.cpp $
 * $Id: stdiostream.cpp 46777 2009-12-30 22:56:19Z Hkz $
 *
 */

#include "backends/fs/stdiostream.h"

StdioStream::StdioStream(void *handle) : _handle(handle) {
      assert(handle);
}

StdioStream::~StdioStream() {
      fclose((FILE *)_handle);
}

bool StdioStream::err() const {
      return ferror((FILE *)_handle) != 0;
}

void StdioStream::clearErr() {
      clearerr((FILE *)_handle);
}

bool StdioStream::eos() const {
      return feof((FILE *)_handle) != 0;
}

int32 StdioStream::pos() const {
      return ftell((FILE *)_handle);
}

int32 StdioStream::size() const {
      int32 oldPos = ftell((FILE *)_handle);
      fseek((FILE *)_handle, 0, SEEK_END);
      int32 length = ftell((FILE *)_handle);
      fseek((FILE *)_handle, oldPos, SEEK_SET);

      return length;
}

bool StdioStream::seek(int32 offs, int whence) {
      return fseek((FILE *)_handle, offs, whence) == 0;
}

uint32 StdioStream::read(void *ptr, uint32 len) {
      return fread((byte *)ptr, 1, len, (FILE *)_handle);
}

uint32 StdioStream::write(const void *ptr, uint32 len) {
      return fwrite(ptr, 1, len, (FILE *)_handle);
}

bool StdioStream::flush() {
      return fflush((FILE *)_handle) == 0;
}

StdioStream *StdioStream::makeFromPath(const Common::String &path, bool writeMode) {
      FILE *handle = fopen(path.c_str(), writeMode ? "wb" : "rb");

#ifdef __amigaos4__
      //
      // Work around for possibility that someone uses AmigaOS "newlib" build
      // with SmartFileSystem (blocksize 512 bytes), leading to buffer size
      // being only 512 bytes. "Clib2" sets the buffer size to 8KB, resulting
      // smooth movie playback. This forces the buffer to be enough also when
      // using "newlib" compile on SFS.
      //
      if (handle && !writeMode) {
            setvbuf(handle, NULL, _IOFBF, 8192);
      }
#endif

#if defined(__WII__)
      // disable newlib's buffering, the device libraries handle caching
      if (handle)
            setvbuf(handle, NULL, _IONBF, 0);
#endif

      if (handle)
            return new StdioStream(handle);
      return 0;
}

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