cunixf.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 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
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (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.
- *
- * 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 <sys/stat.h>
- #include <sys/types.h>
- #include <fcntl.h>
- #include <unistd.h>
- #include <errno.h>
- #include "chxdataf.h"
- #include "cunixf.h"
- #include "hxheap.h"
- #include "hxresult.h"
- #if !defined _VXWORKS && !defined __QNXNTO__
- extern int errno;
- #endif
- #define HX_FILE_NOT_OPEN -1000
- CHXDataFile*
- CHXDataFile::Construct (UINT32 ulFlags, IUnknown** ppCommonObj)
- {
- return new CUnixFile;
- }
- // CHXFile should set the file reference to a value
- // indicating the file is not open
- CUnixFile::CUnixFile (void)
- {
- // set FD to indicate file is not open
- mFD = HX_FILE_NOT_OPEN;
- mLastError = HXR_OK;
- }
- // ~CHXFile should close the file if it is open
- CUnixFile::~CUnixFile(void)
- {
- // close the file if it is open
- if ( mFD > 0 )
- {
- close( mFD );
- }
- }
- // Following comments and code of GetSize were directly taken from the
- // windows implementation ../win/cwinfile.cpp
- // Simply uses stat to get the size of the file in bytes. If the file
- // is closed, it will still work.
- ULONG32 CUnixFile::GetSize(void)
- {
- struct stat filestats;
- if (mFD >= 0)
- {
- fstat(mFD, &filestats);
- return filestats.st_size;
- }
- return 0;
- }
- // Create a file with the specified mode
- // Closes the previous file if it was open
- // returns HXR_OK or HXR_INVALID_FILE if an error occurred
- HX_RESULT CUnixFile::Create(const char *filename, UINT16 mode, BOOL textflag)
- {
- // close previous file if necessary
- if ( mFD > 0 )
- close( mFD );
- // create file
- mLastError = HXR_OK;
- if ( ( mFD = creat( filename, mode ) ) < 0 )
- {
- mLastError = errno;
- return HXR_DOC_MISSING;
- }
- return HXR_OK;
- }
- // Open a file with the specified mode
- // Closes the previous file if it was open
- // returns HXR_OK or HXR_INVALID_FILE if an error occurred
- HX_RESULT CUnixFile::Open(const char *filename, UINT16 mode, BOOL textflag)
- {
- // close previous file if necessary
- if ( mFD > 0 )
- close( mFD );
- // open file
- mLastError = HXR_OK;
- #ifndef _VXWORKS /* VXWORKS uses FAT32 */
- #define OPENFLAGS (S_IREAD | S_IWRITE)
- #else
- #endif
- if ( ( mFD = open( filename, mode, OPENFLAGS ) ) < 0 )
- {
- mLastError = errno;
- return HXR_DOC_MISSING;
- }
- // change permissions to allow everyone to read the file and owner to write
- // only if I have to create this file
- #if !defined(_VXWORKS) && !defined(_BEOS)
- if ( mode & O_CREAT )
- fchmod( mFD, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
- #endif
- return HXR_OK;
- }
- // Close the previous file if it was open
- // returns HXR_OK or HXR_INVALID_FILE if an error occurred
- HX_RESULT CUnixFile::Close(void)
- {
- // close previous file if necessary
- if ( mFD > 0 )
- {
- mLastError = HXR_OK;
- if ( close( mFD ) < 0 )
- {
- mLastError = errno;
- return HXR_INVALID_FILE;
- }
- return HXR_OK;
- }
- return HXR_INVALID_FILE;
- }
- HX_RESULT CUnixFile::Delete(const char* pFilename)
- {
- if(mFD > 0)
- {
- close(mFD);
- }
- mLastError = HXR_OK;
- if(unlink(pFilename))
- {
- if(errno == EACCES)
- {
- mLastError = HXR_ACCESSDENIED;
- }
- else
- {
- mLastError = HXR_DOC_MISSING;
- }
- }
- return mLastError;
- }
- // Seek moves the current file position to the offset from the fromWhere
- // specifier returns HXR_OK or HXR_INVALID_FILE if an error occurred
- HX_RESULT CUnixFile::Seek(ULONG32 offset, UINT16 fromWhere)
- {
- if ( mFD > 0 )
- {
- mLastError = HXR_OK;
- if ( lseek( mFD, offset, fromWhere ) < 0 )
- {
- mLastError = errno;
- return HXR_INVALID_FILE;
- }
- return HXR_OK;
- }
- return HXR_INVALID_FILE;
- }
- // Rewind sets the file position to the start of file
- // returns HXR_OK or HXR_INVALID_FILE if an error occurred
- HX_RESULT CUnixFile::Rewind(void)
- {
- if ( mFD > 0 )
- {
- mLastError = HXR_OK;
- if ( lseek( mFD, 0, SEEK_SET ) < 0 )
- {
- mLastError = errno;
- return HXR_INVALID_FILE;
- }
- return HXR_OK;
- }
- return HXR_INVALID_FILE;
- }
- // Tell returns the current file position
- // returns HXR_OK or -1 if an error occurred
- ULONG32 CUnixFile::Tell(void)
- {
- long offset = -1;
- if ( mFD > 0 )
- {
- mLastError = HXR_OK;
- // the tell() function will consistently generate a warning
- // and I haven't figured out how to fix that yet
- /****
- if ((offset = tell( mFD )) < 0 )
- {
- mLastError = errno;
- }
- ****/
- // so we do this instead....
- if ((offset = lseek( mFD, 0, SEEK_CUR )) < 0 )
- {
- mLastError = 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 */
- ULONG32 CUnixFile::Read (char *buf, ULONG32 count)
- {
- int ncnt = -1; // number of bytes read
- if ( mFD > 0 )
- {
- mLastError = HXR_OK;
- ULONG32 tmpCheck = Tell();
- if ( ( ncnt = read( mFD, buf, count ) ) < 0 )
- {
- mLastError = errno;
- }
- }
- 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 */
- ULONG32 CUnixFile::Write(const char *buf, ULONG32 count)
- {
- int ncnt = -1; // number of bytes written
- if ( mFD > 0 )
- { mLastError = HXR_OK;
- if ( ( ncnt = write( mFD, buf, count ) ) < 0 )
- {
- mLastError = errno;
- }
- }
- return (ULONG32)ncnt;
- }
- BOOL CUnixFile::GetTemporaryFileName(const char *tag, char* name, UINT32 ulBufLen)
- {
- #ifdef _MAC_UNIX
- // GR 7/15/03 other Unix implementations should probably use this (or tempnam)
- // instead of tmpnam
-
- const int kBuffsize = 1024;
- char buff[kBuffsize];
- int count = snprintf(buff, kBuffsize, "/tmp/%s_XXXXXX", tag);
- if (count > 0 && count < kBuffsize)
- {
- // replace the X's with digits
- if (mktemp(buff) != NULL)
- {
- strncpy(name, buff, ulBufLen);
- return TRUE;
- }
- }
- return FALSE;
-
- #else
- if (tmpnam(name))
- return TRUE;
- else
- return FALSE;
- #endif
- }