text: // 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);
  }
  