fmemio.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: fmemio.cpp,v 1.5.32.3 2004/07/09 01:44:51 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hlxclib/stdio.h"
- #include "hlxclib/errno.h"
- #include "hxtypes.h"
- #include "fmemio.h"
- #include "sockio.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- FMEMIO::FMEMIO(CHXDataFileMem* mem_file)
- {
- mMemFile = mem_file;
- if (!mMemFile)
- {
- err = -1;
- return;
- }
- err = 0;
- _flags = (int) O_RDONLY;
- }
- FMEMIO::~FMEMIO()
- {
- }
- LONG32
- FMEMIO::read(void* buf, LONG32 size)
- {
- HX_ASSERT(buf);
- LONG32 lActualRead = mMemFile->Read((char *) buf, (ULONG32) size);
- // MemFile returns 0 bytes read if it is still waiting for more
- // data to arrive...
- // in this case set err to wouldblock and return -1
- if (lActualRead == 0)
- {
- err = EWOULDBLOCK;
- return -1;
- }
- // if there was some error in reading or it is end of file
- // memfile returns -1...
- /// in this case return 0 which marks end of file for fsio..
- else if (lActualRead < 0)
- {
- err = mMemFile->GetLastError();
- return 0;
- }
- err = 0;
- // if everything is fine, return actual bytes read...
- return lActualRead;
- }
- LONG32
- FMEMIO::write(const void* buf, LONG32 size)
- {
- HX_ASSERT(FALSE);
- return 0;
- }
- off_t
- FMEMIO::seek(off_t off, LONG32 whence)
- {
- HX_RESULT theErr = HXR_OK;
- theErr = mMemFile->Seek(off, (UINT16) whence);
- if (!theErr)
- {
- err = 0;
- return (off_t) mMemFile->Tell();
- }
- else
- {
- err = theErr;
- return (off_t) -1;
- }
- }
- LONG32
- FMEMIO::close()
- {
- mMemFile->Close();
- err = 0;
- return 0;
- }
- off_t
- FMEMIO::file_size()
- {
- HX_ASSERT(FALSE);
- return 0;
- // not supported...
- // seek to SEEK_END is not supported by CRaDataFileMem
- /*
- ULONG32 lCurrPos = mMemFile->Tell();
- mMemFile->Seek(0, SEEK_END);
- ULONG32 lFileSize = mMemFile->Tell();
- mMemFile->Seek(lCurrPos, SEEK_SET);
- err = 0;
- return (off_t) lFileSize;
- */
- }
- LONG32
- FMEMIO::error()
- {
- return err;
- }
- LONG32
- FMEMIO::flags()
- {
- return _flags;
- }