1 files changed, 67 insertions, 0 deletions
diff --git a/genisoimage/bswap.h b/genisoimage/bswap.h
new file mode 100644
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--- /dev/null
+++ b/genisoimage/bswap.h
@@ -0,0 +1,67 @@
+/*
+ * This file has been modified for the cdrkit suite.
+ *
+ * The behaviour and appearence of the program code below can differ to a major
+ * extent from the version distributed by the original author(s).
+ *
+ * For details, see Changelog file distributed with the cdrkit package. If you
+ * received this file from another source then ask the distributing person for
+ * a log of modifications.
+ *
+ */
+
+/* @(#)bswap.h	1.2 03/03/25 Copyright 2002 J. Schilling */
+#ifndef _BSWAP_H
+#define	_BSWAP_H
+
+/*
+ *	Allow to use B2N_* macros found in libdvdread in a portable way.
+ *	These macros should better be avoided as in place conversion in
+ *	general only works on processors like Motorola 68000 and Intel x86.
+ *	Modern processors usually have alignement restrictions that may
+ *	cause problems. The stripped down libdvdread for genisoimage is known
+ *	not to have these alignement problems, so we may use the macros
+ *	as they have been introduced by the authors of libdvdread.
+ *
+ *	Copyright (c) 2002 J. Schilling
+ */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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; see the file COPYING.  If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <mconfig.h>
+#include <btorder.h>
+#include <intcvt.h>
+
+#if defined(WORDS_BIGENDIAN)
+
+/* All bigendian systems are fine, just ignore the swaps. */
+#define	B2N_16(x) (void)(x)
+#define	B2N_32(x) (void)(x)
+#define	B2N_64(x) (void)(x)
+
+#else
+
+/*
+ * It is a bad idea to convert numbers in place.
+ * In protocols, there is usually the additional problem that the
+ * data is not properly aligned.
+ */
+#define	B2N_16(x) (x) = a_to_u_2_byte(&(x))
+#define	B2N_32(x) (x) = a_to_u_4_byte(&(x))
+#define	B2N_64(x) (x) = a_to_u_8_byte(&(x))
+
+#endif
+
+#endif /* _BSWAP_H */