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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: cfsize - Common get file size function
*
* Copyright (C) 2000 - 2020, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acapps.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 = ftell(file);
if (current_offset < 0) {
goto offset_error;
}
status = fseek(file, 0, SEEK_END);
if (ACPI_FAILURE(status)) {
goto seek_error;
}
file_size = ftell(file);
if (file_size < 0) {
goto offset_error;
}
/* Restore original file pointer */
status = fseek(file, current_offset, SEEK_SET);
if (ACPI_FAILURE(status)) {
goto seek_error;
}
return ((u32)file_size);
offset_error:
fprintf(stderr, "Could not get file offset\n");
return (ACPI_UINT32_MAX);
seek_error:
fprintf(stderr, "Could not set file offset\n");
return (ACPI_UINT32_MAX);
}
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