Initial revision

1 files changed, 52 insertions, 0 deletions

diff --git a/utils/BitField.cc b/utils/BitField.cc
new file mode 100644
index 0000000..ad9532a
--- /dev/null
+++ b/utils/BitField.cc
@@ -0,0 +1,52 @@
+/*
+ *	CENA C++ Utilities
+ *
+ *	by Stephane Chatty
+ *
+ *	Copyright 1992
+ *	Centre d'Etudes de la Navigation Aerienne (CENA)
+ *
+ *	bit fields
+ *
+ *	$Id$
+ *	$CurLog$
+ */
+
+
+#include "BitField.h"
+#include <memory.h>
+#include <stdio.h>
+
+CcuBitField :: CcuBitField ()
+{
+	memset ((char*) Chunks, 0, 8 * sizeof (long));
+}
+
+CcuBitRef
+CcuBitField :: operator [] (int i)
+{
+	if (i < 0 || i >= 8 * sizeof (long)) {
+		fprintf (stderr, "Bad access to bitfield: index %d\n", i);
+		i = 0;
+	}
+	short q = i / sizeof (long);
+	short r = i - q * sizeof (long);
+	return CcuBitRef (*this, q, r);
+}
+
+CcuBitRef :: operator bool () const
+{
+	return bool (Field.Chunks [Chunk] & (1L << Offset));
+}
+
+bool
+CcuBitRef :: operator = (bool b) const
+{
+	long* l = Field.Chunks + Chunk;
+	long m = (1L << Offset);
+	if (b)
+		(*l) |= m;
+	else
+		(*l) &= ~m;
+	return b;
+}