coreutils-6.9coreutils-6.9

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/randint.h b/lib/randint.h
new file mode 100644
index 0000000..4245a6d
--- /dev/null
+++ b/lib/randint.h
@@ -0,0 +1,52 @@
+/* Generate random integers.
+
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+   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, 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.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef RANDINT_H
+
+# define RANDINT_H 1
+
+# include <stdint.h>
+
+# include "randread.h"
+
+/* An unsigned integer type, used for random integers, and its maximum
+   value.  */
+typedef uintmax_t randint;
+# define RANDINT_MAX UINTMAX_MAX
+
+struct randint_source;
+
+struct randint_source *randint_new (struct randread_source *);
+struct randint_source *randint_all_new (char const *, size_t);
+struct randread_source *randint_get_source (struct randint_source const *);
+randint randint_genmax (struct randint_source *, randint genmax);
+
+/* Consume random data from *S to generate a random number in the range
+   0 .. CHOICES-1.  CHOICES must be nonzero.  */
+static inline randint
+randint_choose (struct randint_source *s, randint choices)
+{
+  return randint_genmax (s, choices - 1);
+}
+
+void randint_free (struct randint_source *);
+int randint_all_free (struct randint_source *);
+
+#endif