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diff --git a/qemu/roms/openbios/fs/hfsplus/include/btree.h b/qemu/roms/openbios/fs/hfsplus/include/btree.h
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+++ b/qemu/roms/openbios/fs/hfsplus/include/btree.h
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+/*
+ * libhfs - library for reading and writing Macintosh HFS volumes.
+ *
+ * The fucntions are used to handle the various forms of btrees
+ * found on HFS+ volumes.
+ *
+ * Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de>
+ * Original 1996-1998 Robert Leslie <rob@mars.org>
+ * Additional work by Brad Boyer (flar@pants.nu)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ * $Id: btree.h,v 1.10 2000/10/25 05:43:04 hasi Exp $
+ */
+
+/** Intialize catalog btree, so that btree_close can safely be called. */
+extern void btree_reset(btree* bt);
+
+/** Intialize catalog btree */
+extern int btree_init_cat(btree* bt, volume* vol, hfsp_fork_raw* fork);
+
+/** Intialize extents btree */
+extern int btree_init_extent(btree* bt, volume* vol, hfsp_fork_raw* fork);
+
+/** close the btree and free any resources */
+extern void btree_close(btree* bt);
+
+/* Read node at given index */
+extern node_buf* btree_node_by_index(btree* bt, UInt16 index);
+
+/* returns pointer to key given by index in current node */
+extern void* btree_key_by_index(btree* bt, node_buf* buf, UInt16 index);
+
+#ifdef DEBUG
+ /* Dump all the btree information to stdout */
+ extern void btree_print(btree* bt);
+#endif