From 932061675dc1b20e7947c6cb4e0bcbd8d5d06d30 Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Tue, 23 Apr 1996 15:28:35 +0000
Subject: (swab_disk): New variable. (swab_short, swab_long): New functions.

---
 ufs/ufs.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'ufs')

diff --git a/ufs/ufs.h b/ufs/ufs.h
index ca186434..68a5dece 100644
--- a/ufs/ufs.h
+++ b/ufs/ufs.h
@@ -112,6 +112,9 @@ enum compat_mode
       of the dinode. */
 int direct_symlink_extension;
 
+/* If this is set, then the disk is byteswapped from native order. */
+int swab_disk;
+
 
 /* Handy macros */
 #define DEV_BSIZE 512
@@ -165,6 +168,26 @@ sync_dinode (int inum, int wait)
 {
   sync_disk_blocks (ino_to_fsba (sblock, inum), sblock->fs_fsize, wait);
 }
+
+
+/* Functions for byte swapping */
+extern inline short
+swab_short (short arg)
+{
+  return (((arg & 0xff) << 8)
+	  | ((arg & 0xff00) >> 8));
+}
+
+extern inline long
+swab_long (long arg)
+{
+  return (((arg & 0xff) << 24)
+	  | ((arg & 0xff00) << 8)
+	  | ((arg & 0xff0000) >> 8)
+	  | ((arg & 0xff000000) >> 24));
+}
+
+
 
 /* From alloc.c: */
 error_t ffs_alloc (struct node *, daddr_t, daddr_t, int, daddr_t *,
-- 
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