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+/******************************************************************************
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+ *
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+ * Module Name: cfsize - Common get file size function
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+ *
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+ *****************************************************************************/
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+
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+/*
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+ * Copyright (C) 2000 - 2014, Intel Corp.
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ * 1. Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions, and the following disclaimer,
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+ * without modification.
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+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
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+ * substantially similar to the "NO WARRANTY" disclaimer below
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+ * ("Disclaimer") and any redistribution must be conditioned upon
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+ * including a substantially similar Disclaimer requirement for further
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+ * binary redistribution.
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+ * 3. Neither the names of the above-listed copyright holders nor the names
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+ * of any contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * Alternatively, this software may be distributed under the terms of the
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+ * GNU General Public License ("GPL") version 2 as published by the Free
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+ * Software Foundation.
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+ *
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+ * NO WARRANTY
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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+ * POSSIBILITY OF SUCH DAMAGES.
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+ */
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+
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+#include <acpi/acpi.h>
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+#include "accommon.h"
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+#include "acapps.h"
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+#include <stdio.h>
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+
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+#define _COMPONENT ACPI_TOOLS
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+ACPI_MODULE_NAME("cmfsize")
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: cm_get_file_size
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+ *
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+ * PARAMETERS: file - Open file descriptor
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+ *
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+ * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX)
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+ *
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+ * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open.
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+ * Does not disturb the current file pointer. Uses perror for
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+ * error messages.
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+ *
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+ ******************************************************************************/
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+u32 cm_get_file_size(FILE * file)
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+{
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+ long file_size;
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+ long current_offset;
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+
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+ /* Save the current file pointer, seek to EOF to obtain file size */
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+
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+ current_offset = ftell(file);
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+ if (current_offset < 0) {
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+ goto offset_error;
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+ }
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+
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+ if (fseek(file, 0, SEEK_END)) {
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+ goto seek_error;
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+ }
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+
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+ file_size = ftell(file);
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+ if (file_size < 0) {
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+ goto offset_error;
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+ }
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+
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+ /* Restore original file pointer */
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+
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+ if (fseek(file, current_offset, SEEK_SET)) {
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+ goto seek_error;
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+ }
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+
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+ return ((u32)file_size);
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+
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+offset_error:
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+ perror("Could not get file offset");
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+ return (ACPI_UINT32_MAX);
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+
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+seek_error:
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+ perror("Could not seek file");
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+ return (ACPI_UINT32_MAX);
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+}
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