filesystemsrc.c

MTK手机平台的MMI部分的源代码

/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2005
*
*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
*  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
*  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE. 
*
*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
*  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
*  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/

/*******************************************************************************
 * Filename:
 * ---------
 *  FileSystemSrc.c
 *
 * Project:
 * --------
 *  MAUI
 *
 * Description:
 * ------------
 *  
 *
 * Author:
 * -------
 *  
 *
 *==============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!! 
 *------------------------------------------------------------------------------
 * removed!
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 * removed!
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 * removed!
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 * removed!
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 *
 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!! 
 *==============================================================================
 *******************************************************************************/

/**
 * Copyright Notice
 * ?2002 - 2003, Pixtel Communications, Inc., 1489 43rd Ave. W.,
 * Vancouver, B.C. V6M 4K8 Canada. All Rights Reserved.
 *  (It is illegal to remove this copyright notice from this software or any
 *  portion of it)
 */

/**************************************************************

   FILENAME : FileSystemSrc.h

   PURPOSE     : Source File for the File System 

   REMARKS     : nil

   AUTHOR      : Yogesh

   DATE     : August-01-2003

**************************************************************/

#include "FileSystemDef.h"
#include "Ucs2prot.h"
#include "MMI_features.h"
#include "fs_type.h"
#include "fs_func.h"
#include "fs_errcode.h"
#include "drm_gprot.h"


S32 gnCurrBuffIndex = 0;
S32 gnFileBytesRead = 0;
U8 gFileBuffer[MAX_BUFF_SIZE];
U8 gbIsCurrentFileEnd = FALSE;
S32 gCurrentFileOffset = 0;

/* Leo add for DLT */


/*****************************************************************************
 * FUNCTION
 *  Searchfile
 * DESCRIPTION
 *  
 * PARAMETERS
 *  file_handle     [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 Searchfile(FILE_HANDLE file_handle)
{
#ifndef MMI_ON_WIN32
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    return (S32) FS_ParseFH(file_handle);
#else /* MMI_ON_WIN32 */ 
    return 1;
#endif /* MMI_ON_WIN32 */ 
}

/* Leo end */


/*****************************************************************************
 * FUNCTION
 *  pfOpenError
 * DESCRIPTION
 *  
 * PARAMETERS
 *  err     [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 pfOpenError(FILE_HANDLE err)
{
#ifndef MMI_ON_WIN32
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    if (err < FS_NO_ERROR)
    {
        return -1;
    }
    else
    {
        return 0;
    }

#else /* MMI_ON_WIN32 */ 

    if (err < FS_NO_ERROR)
    {
        return -1;
    }
    else
    {
        return 0;
    }

#endif /* MMI_ON_WIN32 */ 
}


/*****************************************************************************
 * FUNCTION
 *  pfError
 * DESCRIPTION
 *  
 * PARAMETERS
 *  err     [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 pfError(S32 err)
{
#ifndef MMI_ON_WIN32
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    if (err < FS_NO_ERROR)
    {
        return -1;
    }
    else
    {
        return 0;
    }

#else /* MMI_ON_WIN32 */ 

    if (err < FS_NO_ERROR)
    {
        return -1;
    }
    else
    {
        return 0;
    }

#endif /* MMI_ON_WIN32 */ 
}


/*****************************************************************************
 * FUNCTION
 *  GetFSFileSize
 * DESCRIPTION
 *  
 * PARAMETERS
 *  handle      [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 GetFSFileSize(FILE_HANDLE handle)
{
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/
    S32 nfile_size;

#ifdef MMI_ON_WIN32

    int retval;

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    retval = FS_GetFileSize(handle, &nfile_size);

    if (retval == FS_NO_ERROR)

    {
        return nfile_size;
    }

    else

    {
        return 0;
    }

#else /* MMI_ON_WIN32 */

    FS_GetFileSize(handle, (U32*) & nfile_size);

    return nfile_size;

#endif 
}


/*****************************************************************************
 * FUNCTION
 *  StartFileRead
 * DESCRIPTION
 *  
 * PARAMETERS
 *  handle      [IN]        
 *  nIndex      [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 StartFileRead(FILE_HANDLE handle, U32 nIndex)
{
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/
    S32 nError;

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    gnCurrBuffIndex = 0;

    nError = pfread(gFileBuffer, 1, MAX_BUFF_SIZE, handle, &gnFileBytesRead);
    gbIsCurrentFileEnd = FALSE;
    gCurrentFileOffset = gnFileBytesRead - 1;
    if (pfError(nError) || gnFileBytesRead < MAX_BUFF_SIZE)
    {
        gbIsCurrentFileEnd = TRUE;
        return EOF;
    }

    return 0;
}


/*****************************************************************************
 * FUNCTION
 *  pfgetc
 * DESCRIPTION
 *  
 * PARAMETERS
 *  handle      [IN]        
 * RETURNS
 *  
 *****************************************************************************/
S32 pfgetc(FILE_HANDLE handle)
{
    /*----------------------------------------------------------------*/
    /* Local Variables                                                */
    /*----------------------------------------------------------------*/
    S32 nRead = 0;

    /*----------------------------------------------------------------*/
    /* Code Body                                                      */
    /*----------------------------------------------------------------*/
    if (gnCurrBuffIndex - gnFileBytesRead >= 0)
    {
        nRead = pfread(gFileBuffer, 1, MAX_BUFF_SIZE, handle, &gnFileBytesRead);
        gCurrentFileOffset += gnFileBytesRead;
        gnCurrBuffIndex = 0;
        /* MTK modified, Max: to prevent endless file reading 1201 */
        if (pfError(nRead) || gnFileBytesRead == 0)
        {
            gbIsCurrentFileEnd = TRUE;
            return EOF;
        }
        /* MTK end */
    }

    return (S32) gFileBuffer[gnCurrBuffIndex++];
}


/*****************************************************************************
 * FUNCTION
 *  pCacheFileRead
 * DESCRIPTION
 *  
 * PARAMETERS
 *  handle          [IN]        
 *  nBufferSize     [IN]        
 *  pnRead          [?]         
 *  pBuffer         [?]         
 * RETURNS
 *  
 *****************************************************************************/
S32 pCacheFileRead(FILE_HANDLE handle, S32 nBufferSize, S32 *pnRead, U8 *pBuffer)