fsal.c

最新MTK手机软件源码

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

#ifndef FSAL_STANDALONE
   #include "drm_gprot.h"
#endif

#include "fsal.h"

/* Put common code of FSAL_Open series APIs in this function */
void fsal_Open_Internal(STFSAL *pstFSAL)
{
   /* pstFSAL has been checked to be valid in FSAL_Open series APIs */
   pstFSAL->bBuffering = KAL_FALSE;
   pstFSAL->pbBuf = NULL;
   pstFSAL->uBufSize = 0;
   /* reserved value to identify an invalid read buffer */
   pstFSAL->uCachedBlock = 0xFFFFFFFF;
   pstFSAL->bDirty = KAL_FALSE;
}



FSAL_Status FSAL_Open(STFSAL *pstFSAL, void *szFile, FSAL_FileMode eMode)
{
   FSAL_Status ret;
   FSAL_CHECK_ARG(pstFSAL!=NULL);
   FSAL_CHECK_ARG(szFile!=NULL);

   /* Open File */
   if ((ret=FSAL_Direct_Open(pstFSAL, szFile, eMode))!=FSAL_OK)
      return ret;

   /* Set File Size */
   if( eMode != FSAL_ROMFILE )
   {
      pstFSAL->uRamFileSize = 0;
      if ((ret=FSAL_Direct_GetFileSize(pstFSAL, &(pstFSAL->uFileSize)))!=FSAL_OK) {
         FSAL_Direct_Close(pstFSAL);
         return ret;
      }
   }

   /* Set File Position */
   if (eMode == FSAL_READ || eMode == FSAL_WRITE || eMode == FSAL_ROMFILE)
   {
      pstFSAL->uFileOffset = 0;
      pstFSAL->uRamFileOffset = 0;
   }
   else if (eMode == FSAL_APPEND )
   {
      pstFSAL->uFileOffset = pstFSAL->uFileSize;
      if ((ret=FSAL_Direct_Seek(pstFSAL, pstFSAL->uFileOffset))!=FSAL_OK) {
         FSAL_Direct_Close(pstFSAL);
         return ret;
      }
   }

/*
   if ((ret=FSAL_Direct_GetCurPos(pstFSAL, &(pstFSAL->uFileOffset)))!=FSAL_OK) {
      FSAL_Direct_Close(pstFSAL);
      return ret;
   }
*/
   fsal_Open_Internal(pstFSAL);

   return FSAL_OK;
}



FSAL_Status FSAL_Open_WithHandle(STFSAL *pstFSAL, void *pFileHandle)
{
   FSAL_Status ret;

   FSAL_CHECK_ARG(pstFSAL!=NULL);
   FSAL_CHECK_ARG(pFileHandle!=NULL);

   /* Set File Handle */
#if FSAL_PLATFORM_WIN32
   pstFSAL->hFile = pFileHandle;
#elif FSAL_PLATFORM_KAL
   pstFSAL->hFile = (FS_HANDLE)pFileHandle;
#elif FSAL_PLATFORM_MEMORY
   FSAL_ASSERT(KAL_FALSE);
#endif
   pstFSAL->pbFile = NULL;

   /* Set File Size */
   if ((ret=FSAL_Direct_GetFileSize(pstFSAL, &(pstFSAL->uFileSize)))!=FSAL_OK)
      return ret;

   /* Set File Position */
   if ((ret=FSAL_Direct_GetCurPos(pstFSAL, &(pstFSAL->uFileOffset)))!=FSAL_OK)
      return ret;

   fsal_Open_Internal(pstFSAL);

   return FSAL_OK;
}



FSAL_Status FSAL_Open_Attach(STFSAL *pstFSAL, STFSAL *pstFSAL_Existing)
{
   FSAL_Status ret;
   FSAL_CHECK_ARG(pstFSAL!=NULL);
   FSAL_CHECK_ARG(pstFSAL_Existing!=NULL);

   pstFSAL->hFile = pstFSAL_Existing->hFile;
   pstFSAL->pbFile = pstFSAL_Existing->pbFile;

   /* Set File Size */
   pstFSAL->uFileSize = pstFSAL_Existing->uFileSize;
   pstFSAL->uRamFileSize = pstFSAL_Existing->uRamFileSize;

   /* Set File Position */
   if ((kal_int32)(pstFSAL->hFile)!=-1) {
      if ((ret=FSAL_Direct_GetCurPos(pstFSAL_Existing, &(pstFSAL->uFileOffset)))!=FSAL_OK)
         return ret;
   } else if ((ret=FSAL_Direct_GetCurPos(pstFSAL_Existing, &(pstFSAL->uRamFileOffset)))!=FSAL_OK)
      return ret;

   fsal_Open_Internal(pstFSAL);

   return FSAL_OK;
}



void FSAL_SetBuffer(STFSAL *pstFSAL, kal_uint32 uBufferSize, kal_uint8 *pbBuf)
{
   FSAL_ASSERT_NO_RET_VAL(pstFSAL!=NULL);
   FSAL_ASSERT_NO_RET_VAL(uBufferSize!=0);
   FSAL_ASSERT_NO_RET_VAL(pbBuf!=NULL);

   /* If opened in FSAL_ROMFILE mode, it is unnecessary to set buffer. */
   if( pstFSAL->pbFile )
   {
      pstFSAL->bBuffering = KAL_FALSE;
      return;
   }
   pstFSAL->bBuffering = KAL_TRUE;
   pstFSAL->pbBuf = pbBuf;
   pstFSAL->uBufSize = uBufferSize;
}



FSAL_Status FSAL_Close(STFSAL *pstFSAL)
{
   FSAL_CHECK_ARG(pstFSAL!=NULL);
   FSAL_CacheFlush(pstFSAL);
   return FSAL_Direct_Close(pstFSAL);