bufdataf.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: bufdataf.cpp,v 1.4.42.3 2004/07/09 01:44:13 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 <stdio.h>
- #include <stat.h>
- #include <types.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <unix.mac.h> // Anyone using this file MUST #undef _UNIX
- #undef _UNIX
- #include "hxtypes.h"
- #include "hxcom.h"
- #include "hxresult.h"
- #include "ihxpckts.h"
- #include "hxbuffer.h"
- #include "debug.h"
- #include "hxdataf.h"
- #include "datffact.h"
- #include "bufdataf.h"
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // BufferedDataFile::QueryInterface
- // Purpose:
- // Implement this to export the interfaces supported by your
- // object.
- //
- STDMETHODIMP
- BufferedDataFile::QueryInterface(REFIID riid, void** ppvObj)
- {
- if (IsEqualIID(riid, IID_IHXDataFile))
- {
- AddRef();
- *ppvObj = (IHXDataFile*)this;
- return HXR_OK;
- }
-
- *ppvObj = NULL;
- return HXR_NOINTERFACE;
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // BufferedDataFile::AddRef
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32)
- BufferedDataFile::AddRef()
- {
- DPRINTF(0x5d000000, ("UBDF::AddRef() = %ldn", m_lRefCount+1));
- return InterlockedIncrement(&m_lRefCount);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // BufferedDataFile::Release
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32)
- BufferedDataFile::Release()
- {
- DPRINTF(0x5d000000, ("UBDF::Release() = %ldn", m_lRefCount-1));
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
-
- delete this;
- return 0;
- }
- BufferedDataFile::BufferedDataFile()
- : m_lRefCount(0)
- , m_ulLastError(HXR_OK)
- , m_pFilename(new CHXBuffer)
- , m_pFile(0)
- {
- m_pFilename->AddRef();
- DPRINTF(0x5d000000, ("BufferedDataFile::BufferedDataFile()n"));
- }
- // ~CHXFile should close the file if it is open
- BufferedDataFile::~BufferedDataFile()
- {
- // close the file if it is open
- if (m_pFile)
- {
- fclose(m_pFile);
- m_pFile = 0;
- }
- HX_RELEASE(m_pFilename);
- DPRINTF(0x5d000000, ("BufferedDataFile::~BufferedDataFile()n"));
- }
- /*
- * IHXDataFile methods
- */
- /* Bind DataFile Object with FileName */
- STDMETHODIMP_(void)
- BufferedDataFile::Bind(const char* pFilename)
- {
- m_pFilename->Set((BYTE *)pFilename, strlen(pFilename)+1);
- DPRINTF(0x5d000000, ("BufferedDataFile::Bind(%s)n",
- (const char *)m_pFilename->GetBuffer()));
- }
- /* Creates a datafile using the specified mode
- * uOpenMode --- File Open mode - HX_FILEFLAG_READ/HX_FILEFLAG_WRITE/HX_FILEFLAG_BINARY
- */
- STDMETHODIMP
- BufferedDataFile::Create(UINT16 uOpenMode)
- {
- return HXR_NOTIMPL;
- }
- /* Open will open a file with the specified mode
- */
- STDMETHODIMP
- BufferedDataFile::Open(UINT16 uOpenMode)
- {
- DPRINTF(0x5d000000, ("BufferedDataFile::Open()n"));
- char modeflags[4]; /* Flawfinder: ignore */
-
- if(uOpenMode & HX_FILEFLAG_READ)
- {
- modeflags[0] = 'r';
- modeflags[1] = 0;
- if(uOpenMode & HX_FILEFLAG_WRITE)
- {
- modeflags[1] = '+';
- modeflags[2] = 0;
- }
- if(uOpenMode & HX_FILEFLAG_BINARY)
- strcat(modeflags, "b"); /* Flawfinder: ignore */
- }
- else if(uOpenMode & HX_FILEFLAG_WRITE)
- {
- modeflags[0] = 'w';
- modeflags[1] = 0;
- if(uOpenMode & HX_FILEFLAG_BINARY)
- strcat(modeflags, "b"); /* Flawfinder: ignore */
- }
- else if(!uOpenMode)
- {
- uOpenMode = HX_FILEFLAG_READ | HX_FILEFLAG_BINARY;
- modeflags[0] = 'r';
- modeflags[1] = 'b';
- modeflags[2] = 0;
- }
- else
- {
- return HXR_INVALID_PARAMETER;
- }
- // close previous file if necessary
- if (m_pFile)
- fclose(m_pFile);
- DPRINTF(0x5d000000, ("BDF::Open() -- %sn", modeflags));
- // open file
- m_ulLastError = HXR_OK;
- if ((m_pFile = fopen((const char *)m_pFilename->GetBuffer(), modeflags)) == NULL)
- {
- m_ulLastError = errno;
- return HXR_DOC_MISSING;
- }
- return HXR_OK;
- }
- /* Close closes a file
- * If the reference count on the IHXDataFile object is greater than 1,
- * then the underlying file cannot be safely closed, so Close() becomes
- * a noop in that case. Close it only when the object is destroyed.
- * This would be safe, but could lead to a file descriptor leak.
- */
- STDMETHODIMP
- BufferedDataFile::Close()
- {
- if (m_pFile)
- {
- fclose(m_pFile);
- m_pFile = 0;
- }
- return HXR_OK;
- }
- /* Name returns the currently bound file name in FileName.
- * and returns TRUE, if the a name has been bound. Otherwise
- * FALSE is returned.
- */
- STDMETHODIMP_(BOOL)
- BufferedDataFile::Name(REF(IHXBuffer*) pFileName)
- {
- return HXR_NOTIMPL;
- }
- /*
- * IsOpen returns TRUE if file is open. Otherwise FALSE.
- */
- inline BOOL
- BufferedDataFile::IsOpen()
- {
- return (m_pFile ? TRUE : FALSE);
- }
- /* Seek moves the current file position to the offset from the
- * fromWhere specifier returns current position of file or -1 on
- * error.
- */
- STDMETHODIMP
- BufferedDataFile::Seek(ULONG32 offset, UINT16 fromWhere)
- {
- if (m_pFile)
- {
- m_ulLastError = HXR_OK;
- if (fseek(m_pFile, offset, fromWhere) < 0)
- {
- m_ulLastError = errno;
- return HXR_INVALID_FILE;
- }
- return HXR_OK;
- }
- return HXR_INVALID_FILE;
- }
- /* Tell returns the current file position in the file */
- STDMETHODIMP_(ULONG32)
- BufferedDataFile::Tell()
- {
- INT32 offset = -1;
- if (m_pFile)
- {
- m_ulLastError = HXR_OK;
- // so we do this instead....
- if ((offset = fseek(m_pFile, 0, SEEK_CUR)) < 0)
- {
- m_ulLastError = errno;
- }
- }
- return (ULONG32)offset;
- }
- /* Read reads up to count bytes of data into buf.
- * returns the number of bytes read, EOF, or -1 if the read failed
- */
- STDMETHODIMP_(ULONG32)
- BufferedDataFile::Read(REF(IHXBuffer *) pBuf, ULONG32 count)
- {
- HX_ASSERT(pBuf);
- pBuf->AddRef();
- int ncnt = 0; // number of bytes read
- if (m_pFile)
- {
- m_ulLastError = HXR_OK;
- ULONG32 tmpCheck = Tell();
- if ((ncnt = fread((void *)pBuf->GetBuffer(), sizeof(char),
- count, m_pFile)) < count)
- {
- m_ulLastError = errno;
- }
- }
- pBuf->Release();
- return (ULONG32)ncnt;
- }
- /* Write writes up to count bytes of data from buf.
- * returns the number of bytes written, or -1 if the write failed
- */
- STDMETHODIMP_(ULONG32)
- BufferedDataFile::Write(REF(IHXBuffer *) pBuf)
- {
- HX_ASSERT(pBuf);
- pBuf->AddRef();
- int ncnt = -1; // number of bytes written
- int count = pBuf->GetSize();
- if (m_pFile)
- {
- m_ulLastError = HXR_OK;
- if ((ncnt = fwrite((const char *)pBuf->GetBuffer(), sizeof(char),
- count, m_pFile)) < count)
- {
- m_ulLastError = errno;
- }
- }
- pBuf->Release();
- return (ULONG32)ncnt;
- }
- /* Flush out the data in case of Buffered I/O
- */
- STDMETHODIMP
- BufferedDataFile::Flush()
- {
- if (m_pFile)
- {
- m_ulLastError = HXR_OK;
- if (!fflush(m_pFile))
- {
- m_ulLastError = errno;
- return HXR_INVALID_FILE;
- }
- return HXR_OK;
- }
- return HXR_INVALID_FILE;
- }
- /*
- * Return info about the data file such as permissions, time of creation
- * size in bytes, etc.
- */
- STDMETHODIMP
- BufferedDataFile::Stat(struct stat* statbuf)
- {
- if (m_pFile)
- {
- if (!fstat(fileno(m_pFile), statbuf))
- return HXR_OK;
- }
- else if (m_pFilename->GetSize())
- {
- if (!stat((const char *)m_pFilename->GetBuffer(), statbuf))
- return HXR_OK;
- }
- return HXR_FAIL;
- }
- /* Return the file descriptor */
- inline INT16
- BufferedDataFile::GetFd()
- {
- return m_pFile ? fileno(m_pFile) : -1;
- }
- /* GetLastError returns the platform specific file error */
- STDMETHODIMP
- BufferedDataFile::GetLastError()
- {
- return HXR_NOTIMPL;
- }
- /* GetLastError returns the platform specific file error in
- * string form.
- */
- STDMETHODIMP_(void)
- BufferedDataFile::GetLastError(REF(IHXBuffer*) err)
- {
- }