Imported Upstream version 0.72

bitmap.c

@@ -0,0 +1,66 @@
+/*  dvdisaster: Additional error correction for optical media.
+ *  Copyright (C) 2004-2009 Carsten Gnoerlich.
+ *  Project home page: http://www.dvdisaster.com
+ *  Email: carsten@dvdisaster.com  -or-  cgnoerlich@fsfe.org
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA,
+ *  or direct your browser at http://www.gnu.org.
+ */
+
+#include "dvdisaster.h"
+
+/***
+ *** A simple bitmap structure
+ ***/
+
+/*
+ * Allocate the bitmap
+ */
+
+Bitmap* CreateBitmap0(int size)
+{  Bitmap *bm = g_malloc(sizeof(Bitmap));
+
+   bm->size   = size;
+   bm->words  = (size>>5)+1;
+   bm->bitmap = g_malloc0(bm->words*sizeof(guint32));
+
+   return bm;
+}
+
+/* 
+ * Free it
+ */
+
+void FreeBitmap(Bitmap *bm)
+{  if(bm->bitmap)
+     g_free(bm->bitmap);
+
+   g_free(bm);
+}
+
+/*
+ * Count the '1' bits in the bitmap 
+ */
+
+int CountBits(Bitmap *bm)
+{ int i;
+  int sum = 0;
+
+  for(i=0; i<bm->size; i++)
+    if(GetBit(bm, i))
+      sum++;
+
+  return sum;
+}