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/******************************************************************************
*
* Module Name: cfsize - Common get file size function
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2016, 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/acpi.h>
#include "accommon.h"
#include "acapps.h"
#include <stdio.h>
#define _COMPONENT ACPI_TOOLS
ACPI_MODULE_NAME("cmfsize")
/*******************************************************************************
*
* FUNCTION: cm_get_file_size
*
* 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.
*
******************************************************************************/
u32 cm_get_file_size(ACPI_FILE file)
{
long file_size;
long current_offset;
acpi_status status;
/* Save the current file pointer, seek to EOF to obtain file size */
current_offset = acpi_os_get_file_offset(file);
if (current_offset < 0) {
goto offset_error;
}
status = acpi_os_set_file_offset(file, 0, ACPI_FILE_END);
if (ACPI_FAILURE(status)) {
goto seek_error;
}
file_size = acpi_os_get_file_offset(file);
if (file_size < 0) {
goto offset_error;
}
/* Restore original file pointer */
status = acpi_os_set_file_offset(file, current_offset, ACPI_FILE_BEGIN);
if (ACPI_FAILURE(status)) {
goto seek_error;
}
return ((u32)file_size);
offset_error:
acpi_log_error("Could not get file offset");
return (ACPI_UINT32_MAX);
seek_error:
acpi_log_error("Could not set file offset");
return (ACPI_UINT32_MAX);
}
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