1 files changed, 104 insertions, 0 deletions
diff --git a/wodim/movesect.c b/wodim/movesect.c
new file mode 100644
index 0000000..ef4bc70
--- /dev/null
+++ b/wodim/movesect.c
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ *
+ */
+
+/* @(#)movesect.c	1.3 04/03/02 Copyright 2001, 2004 J. Schilling */
+/*
+ *	Copyright (c) 2001, 2004 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 <standard.h>
+#include <utypes.h>
+#include <schily.h>
+
+#include "wodim.h"
+#include "movesect.h"
+
+void	scatter_secs(track_t *trackp, char *bp, int nsecs);
+
+/*
+ * Scatter input sector size records over buffer to make them
+ * output sector size.
+ *
+ * If input sector size is less than output sector size,
+ *
+ *	| sector_0 || sector_1 || ... || sector_n ||
+ *
+ * will be convterted into:
+ *
+ *	| sector_0 |grass|| sector_1 |grass|| ... || sector_n |grass||
+ *
+ *	Sector_n must me moved n * grass_size forward,
+ *	Sector_1 must me moved 1 * grass_size forward
+ *
+ *
+ * If output sector size is less than input sector size,
+ *
+ *	| sector_0 |grass|| sector_1 |grass|| ... || sector_n |grass||
+ *
+ * will be convterted into:
+ *
+ *	| sector_0 || sector_1 || ... || sector_n ||
+ *
+ *	Sector_1 must me moved 1 * grass_size backward,
+ *	Sector_n must me moved n * grass_size backward,
+ *
+ *	Sector_0 must never be moved.
+ */
+void
+scatter_secs(track_t *trackp, char *bp, int nsecs)
+{
+	char	*from;
+	char	*to;
+	int	isecsize = trackp->isecsize;
+	int	secsize = trackp->secsize;
+	int	i;
+
+	if (secsize == isecsize)
+		return;
+
+	nsecs -= 1;	/* we do not move sector # 0 */
+
+	if (secsize < isecsize) {
+		from = bp + isecsize;
+		to   = bp + secsize;
+
+		for (i = nsecs; i > 0; i--) {
+			movebytes(from, to, secsize);
+			from += isecsize;
+			to   += secsize;
+		}
+	} else {
+		from = bp + (nsecs * isecsize);
+		to   = bp + (nsecs * secsize);
+
+		for (i = nsecs; i > 0; i--) {
+			movebytes(from, to, isecsize);
+			from -= isecsize;
+			to   -= secsize;
+		}
+	}
+}