filespecutils.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: filespecutils.cpp,v 1.1.50.3 2004/07/09 01:44:20 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
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 * to use your version of this file under the terms of either the RPSL
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 * 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
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 * ENJOYMENT OR NON-INFRINGEMENT.
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 * Technology Compatibility Kit Test Suite(s) Location:
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 * ***** END LICENSE BLOCK ***** */

#include "hxtypes.h"
#include "hlxclib/sys/stat.h"
#include "hxtick.h"
#include "hxrand.h"

#include "filespecutils.h"
#include "symbihxdataf.h"


HX_RESULT CHXFileSpecUtils::GetFreeSpaceOnDisk(const CHXDirSpecifier& volSpec, INT64& freeSpace)
{
    HX_RESULT retVal = HXR_NOTIMPL;
    
    HX_ASSERT("GetFreeSpaceOnDisk Not written yet" == NULL);

    return retVal;
}

//******************************************************************************
HX_RESULT CHXFileSpecUtils::GetTotalSpaceOnDisk(const CHXDirSpecifier& volSpec, 
						INT64& totalSpace)
{ 
    HX_RESULT retVal = HXR_NOTIMPL;
    
    HX_ASSERT("GetTotalSpaceOnDisk Not written yet" == NULL);

    return retVal;
}

//******************************************************************************
BOOL CHXFileSpecUtils::IsDiskEjectable(const CHXDirSpecifier& volSpec)
{
    BOOL bRetVal = FALSE;
    
    HX_ASSERT("IsDiskEjectable Not written yet" == NULL);

    return bRetVal;
}

// IsLocal returns TRUE if the file or directory is on a local volume
// (not on a server)
//******************************************************************************


/* Include correct headers to get more fs types below... */

BOOL CHXFileSpecUtils::IsDiskLocal(const CHXDirSpecifier& volSpec)
{
    BOOL bRetVal = FALSE;
    
    HX_ASSERT("IsDiskLocal Not written yet" == NULL);

    return bRetVal;
}

// file/dir utilities
//******************************************************************** **********
HX_RESULT CHXFileSpecUtils::RemoveDir(const CHXDirSpecifier& dirSpec)
{
    HX_RESULT retVal = HXR_NOTIMPL;
    
    HX_ASSERT("RemoveDir Not written yet" == NULL);

    return retVal;
};


//******************************************************************** **********
HX_RESULT CHXFileSpecUtils::RemoveFile(const CHXFileSpecifier& fileSpec)
{
    HX_RESULT retVal = HXR_FAILED;
    CSymbIHXDataFile* pDataFile = new CSymbIHXDataFile();

    if (pDataFile)
    {
	pDataFile->AddRef();

	pDataFile->Bind(fileSpec.GetPathName());

	retVal = pDataFile->Delete();

	pDataFile->Close();

	pDataFile->Release();
    }

    return retVal;
};


//******************************************************************************
HX_RESULT CHXFileSpecUtils::GetFileSize(const CHXFileSpecifier& fileSpec, INT64& fSize)
{
    HX_RESULT retVal = HXR_FAILED;
    CSymbIHXDataFile* pDataFile = new CSymbIHXDataFile();

    if (pDataFile)
    {
	struct stat statBuffer;

	pDataFile->AddRef();

	pDataFile->Bind(fileSpec.GetPathName());

	retVal = pDataFile->Stat(&statBuffer);

	pDataFile->Close();

	pDataFile->Release();

	if (retVal == HXR_OK)
	{
	    fSize = statBuffer.st_size;
	}
    }

    return retVal;
}

//******************************************************************************
HX_RESULT CHXFileSpecUtils::GetDirectorySize(const CHXDirSpecifier& dirSpec, BOOL shouldDescend, INT64& fSize)
{
    HX_RESULT retVal = HXR_NOTIMPL;
    
    HX_ASSERT("GetDirectorySize Not written yet" == NULL);

    return retVal;
}

//******************************************************************************
CHXFileSpecifier CHXFileSpecUtils::GetCurrentApplication(void)
{
    CHXFileSpecifier retSpecifier;
    
    HX_ASSERT("GetCurrentApplication Not written yet" == NULL);

    return retSpecifier;
}

//******************************************************************************
CHXDirSpecifier CHXFileSpecUtils::GetCurrentApplicationDir(void)
{
    CHXDirSpecifier retSpecifier;
    
    HX_ASSERT("GetCurrentApplicationDir Not written yet" == NULL);

    return retSpecifier;
}

//******************************************************************************
BOOL CHXFileSpecUtils::FileExists(const CHXFileSpecifier& fileSpec)
{
    HX_RESULT bRetVal = FALSE;
    CSymbIHXDataFile* pDataFile = new CSymbIHXDataFile();

    if (pDataFile)
    {
	struct stat statBuffer;

	pDataFile->AddRef();

	pDataFile->Bind(fileSpec.GetPathName());

	bRetVal = (pDataFile->Stat(&statBuffer) == HXR_OK);

	pDataFile->Close();

	pDataFile->Release();
    }

    return bRetVal;
}

//******************************************************************************
BOOL CHXFileSpecUtils::DirectoryExists(const CHXDirSpecifier& dirSpec)
{
    BOOL bRetVal = FALSE;
    
    HX_ASSERT("DirectoryExists Not written yet" == NULL);

    return bRetVal;
}

//******************************************************************************
HX_RESULT CHXFileSpecUtils::CreateDir(const CHXDirSpecifier& dirSpec)
{
    HX_RESULT retVal = HXR_NOTIMPL;
    
    HX_ASSERT("CreateDir Not written yet" == NULL);

    return retVal;
}

//******************************************************************************
static CHXFileSpecifier GetUniqueFileSpecInternal(const CHXDirSpecifier& locationSpec, 
						  const char *pszNameFirst, const char *pszTemplate, 
						  const char *pszWildcard, UINT32 nStartNum);

const UINT32 kNumWrapValue = 9999+1;	// limit insertions to 4-digit numbers

CHXFileSpecifier CHXFileSpecUtils::GetUniqueFileSpec(const CHXDirSpecifier& locationSpec, 
						     const char *pszNameFirst, const char *pszTemplate, 
						     const char *pszWildcard)
{
    return GetUniqueFileSpecInternal(locationSpec, pszNameFirst, pszTemplate, pszWildcard, 0);
}

CHXFileSpecifier CHXFileSpecUtils::GetUniqueTempFileSpec(const CHXDirSpecifier& locationSpec, 
							 const char *pszTemplate, const char *pszWildcard)
{
    CMultiplePrimeRandom 	rand(HX_GET_TICKCOUNT());
    
    UINT32 num;
    
    num = rand.GetRandomNumber();
    
    num %= kNumWrapValue;
    
    if (num == 0 || num == 1) num = 2;
    
    return GetUniqueFileSpecInternal(locationSpec, NULL, pszTemplate, pszWildcard, num);
}

static CHXFileSpecifier GetUniqueFileSpecInternal(const CHXDirSpecifier& locationSpec, 
                                                  const char *pszNameFirst, const char *pszTemplate, 
                                                  const char *pszWildcard, UINT32 nStartNum)
{
    CHXFileSpecifier 		resultFileSpec;
    
    require_return(locationSpec.IsSet(), resultFileSpec);
    require_return(pszTemplate != NULL && pszWildcard != NULL, resultFileSpec);
    require_return(pszNameFirst != NULL || nStartNum != 0, resultFileSpec);
    
    CHXFileSpecifier 	testFileSpec;
    CHXDirSpecifier 	testDirSpec;
    CHXString			strNumber;
    CHXString			strName;
    UINT32				nCurrentNum;
    
    nCurrentNum = nStartNum;
    
    while (1) 
    {
        // if the number is non-zero, make a string from the template;
        // if the number is zero, user the initial name string
        if (nCurrentNum == 0)
        {
            // replace the wildcard in the template with the number string
            strName = pszNameFirst;
        }
        else
        {
            // replace the wildcard in the template with the number string
            strNumber.Empty();
            strNumber.AppendULONG(nCurrentNum);
	    
            strName = pszTemplate;
            strName.FindAndReplace(pszWildcard, strNumber);	// replace first wildcard with number string
        }
	
	
        // test if a file or directory exists with that name
        testFileSpec = locationSpec.SpecifyChildFile(strName);
        testDirSpec = locationSpec.SpecifyChildDirectory(strName);
        if (CHXFileSpecUtils::FileExists(testFileSpec)
            || CHXFileSpecUtils::DirectoryExists(testDirSpec))
        {
            // an item already has that name, so increment & wrap the number
            nCurrentNum++;
            nCurrentNum %= kNumWrapValue;
	    
            // don't use 0 again, and skip 1 since "MyFile2.txt" logically follows "MyFile.txt"
            if (nCurrentNum == 0 || nCurrentNum == 1) 
            {
                nCurrentNum = 2; 
            }
	    
            // a quick sanity check
            if (nCurrentNum == nStartNum)
            {
                check(!"GetUniqueFileSpecInternal number wrapped");
                break;
            }
        }
        else
        {
            // the name is unique
            resultFileSpec = testFileSpec;
            break;
        }
	
    } // while
    
    return resultFileSpec;
}

//******************************************************************************
CHXDirSpecifier CHXFileSpecUtils::GetSystemTempDirectory()
{
    CHXDirSpecifier retSpecifier;
    
    HX_ASSERT("GetSystemTempDirectory Not written yet" == NULL);

    return retSpecifier;
}


BOOL CHXFileSpecUtils::MakeNameLegal(char *pszName)
{
    BOOL bRetVal = FALSE;
    
    HX_ASSERT("MakeNameLegal Not written yet" == NULL);

    return bRetVal;
}

//******************************************************************************
CHXDirSpecifier 
CHXFileSpecUtils::GetAppDataDir(const char* szAppName)
{
    CHXDirSpecifier retSpecifier;
    
    HX_ASSERT("GetAppDataDir Not written yet" == NULL);

    return retSpecifier;
}