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

 *

 * Module Name: cfsize - Common get file size function

 *

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

/*

 * Copyright (C) 2000 - 2018, Intel Corp.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include "acpi.h"

#include "accommon.h"

#include "acapps.h"

#define _COMPONENT          ACPI_TOOLS

        ACPI_MODULE_NAME    ("cmfsize")

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

 *

 * FUNCTION:    CmGetFileSize

 *

 * PARAMETERS:  File                    - Open file descriptor

 *

 * RETURN:      File Size. On error, -1 (ACPI_UINT32_MAX)

 *

 * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open.

 *              Does not disturb the current file pointer.

 *

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

UINT32

CmGetFileSize (

    ACPI_FILE               File)

{

    long                    FileSize;

    long                    CurrentOffset;

    ACPI_STATUS             Status;

    /* Save the current file pointer, seek to EOF to obtain file size */

    CurrentOffset = ftell (File);

    if (CurrentOffset < 0)

    {

        goto OffsetError;

    }

    Status = fseek (File, 0, SEEK_END);

    if (ACPI_FAILURE (Status))

    {

        goto SeekError;

    }

    FileSize = ftell (File);

    if (FileSize < 0)

    {

        goto OffsetError;

    }

    /* Restore original file pointer */

    Status = fseek (File, CurrentOffset, SEEK_SET);

    if (ACPI_FAILURE (Status))

    {

        goto SeekError;

    }

    return ((UINT32) FileSize);

OffsetError:

    fprintf (stderr, "Could not get file offset\n");

    return (ACPI_UINT32_MAX);

SeekError:

    fprintf (stderr, "Could not set file offset\n");

    return (ACPI_UINT32_MAX);

}