Index: flag.c
===================================================================
--- flag.c	(nonexistent)
+++ flag.c	(revision 4487)
@@ -0,0 +1,75 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  PCB, interactive printed circuit board design
+ *  Copyright (C) 1994,1995,1996,2004,2006 Thomas Nau
+ *
+ *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Contact addresses for paper mail and Email:
+ *  Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
+ *  Thomas.Nau@rz.uni-ulm.de
+ *
+ */
+
+#include <string.h>
+#include "flag.h"
+
+/* This just fills in a FlagType with current flags.  */
+FlagType MakeFlags(unsigned int flags)
+{
+	FlagType rv;
+	memset(&rv, 0, sizeof(rv));
+	rv.f = flags;
+	return rv;
+}
+
+/* This converts old flag bits (from saved PCB files) to new format.  */
+FlagType OldFlags(unsigned int flags)
+{
+	FlagType rv;
+	int i, f;
+	memset(&rv, 0, sizeof(rv));
+	/* If we move flag bits around, this is where we map old bits to them.  */
+	rv.f = flags & 0xffff;
+	f = 0x10000;
+	for (i = 0; i < 8; i++) {
+		/* use the closest thing to the old thermal style */
+		if (flags & f)
+			rv.t[i / 2] |= (1 << (4 * (i % 2)));
+		f <<= 1;
+	}
+	return rv;
+}
+
+FlagType AddFlags(FlagType flag, unsigned int flags)
+{
+	flag.f |= flags;
+	return flag;
+}
+
+FlagType MaskFlags(FlagType flag, unsigned int flags)
+{
+	flag.f &= ~flags;
+	return flag;
+}
+
+int mem_any_set(unsigned char *ptr, int bytes)
+{
+	while (bytes--)
+		if (*ptr++)
+			return 1;
+	return 0;
+}