README change

1 files changed, 38 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/general/random.h b/gnuradio-core/src/lib/general/random.h
new file mode 100644
index 000000000..c643c3e42
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+++ b/gnuradio-core/src/lib/general/random.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2003, 2008 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _RANDOM_H_
+#define _RANDOM_H_
+
+// While rand(3) specifies RAND_MAX, random(3) says that the output
+// ranges from 0 to 2^31-1 but does not specify a macro to denote
+// this.  We define RANDOM_MAX for cleanliness.  We must omit the
+// definition for systems that have made the same choice.  (Note that
+// random(3) is from 4.2BSD, and not specified by POSIX.)
+
+#ifndef RANDOM_MAX
+static const int RANDOM_MAX = 2147483647; // 2^31-1
+#endif /* RANDOM_MAX */
+
+#include <stdlib.h>
+
+#endif // _RANDOM_H_