1 files changed, 101 insertions, 0 deletions

diff --git a/tools/power/acpi/common/cmfsize.c b/tools/power/acpi/common/cmfsize.c
new file mode 100644
index 000000000000..5140e5edae1f
--- /dev/null
+++ b/tools/power/acpi/common/cmfsize.c
@@ -0,0 +1,101 @@
+/******************************************************************************
+ *
+ * Module Name: cfsize - Common get file size function
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2014, 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. Uses perror for
+ *              error messages.
+ *
+ ******************************************************************************/
+u32 cm_get_file_size(FILE * file)
+{
+        long file_size;
+        long current_offset;
+
+        /* Save the current file pointer, seek to EOF to obtain file size */
+
+        current_offset = ftell(file);
+        if (current_offset < 0) {
+                goto offset_error;
+        }
+
+        if (fseek(file, 0, SEEK_END)) {
+                goto seek_error;
+        }
+
+        file_size = ftell(file);
+        if (file_size < 0) {
+                goto offset_error;
+        }
+
+        /* Restore original file pointer */
+
+        if (fseek(file, current_offset, SEEK_SET)) {
+                goto seek_error;
+        }
+
+        return ((u32)file_size);
+
+offset_error:
+        perror("Could not get file offset");
+        return (ACPI_UINT32_MAX);
+
+seek_error:
+        perror("Could not seek file");
+        return (ACPI_UINT32_MAX);
+}