From 349cfa7acb95abe865209a28e417ec74b56f9bba Mon Sep 17 00:00:00 2001
From: Alberto Gonzalez Iniesta <agi@inittab.org>
Date: Tue, 21 Feb 2012 15:53:40 +0100
Subject: Imported Upstream version 2.2.1

---
 integer.h | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 integer.h

(limited to 'integer.h')

diff --git a/integer.h b/integer.h
new file mode 100644
index 0000000..f0fc196
--- /dev/null
+++ b/integer.h
@@ -0,0 +1,114 @@
+/*
+ *  OpenVPN -- An application to securely tunnel IP networks
+ *             over a single UDP port, with support for SSL/TLS-based
+ *             session authentication and key exchange,
+ *             packet encryption, packet authentication, and
+ *             packet compression.
+ *
+ *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ *  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 included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef INTEGER_H
+#define INTEGER_H
+
+#include "error.h"
+
+/*
+ * min/max functions
+ */
+
+static inline int
+max_int (int x, int y)
+{
+  if (x > y)
+    return x;
+  else
+    return y;
+}
+
+static inline int
+min_int (int x, int y)
+{
+  if (x < y)
+    return x;
+  else
+    return y;
+}
+
+static inline int
+constrain_int (int x, int min, int max)
+{
+  if (min > max)
+    return min;
+  if (x < min)
+    return min;
+  else if (x > max)
+    return max;
+  else
+    return x;
+}
+
+/*
+ * Functions used for circular buffer index arithmetic.
+ */
+
+/*
+ * Return x - y on a circle of circumference mod by shortest path.
+ *
+ * 0 <= x < mod
+ * 0 <= y < mod
+ */
+static inline int
+modulo_subtract(int x, int y, int mod)
+{
+  const int d1 = x - y;
+  const int d2 = (x > y ? -mod : mod) + d1;
+  ASSERT (0 <= x && x < mod && 0 <= y && y < mod);
+  return abs(d1) > abs(d2) ? d2 : d1;
+}
+
+/*
+ * Return x + y on a circle of circumference mod.
+ *
+ * 0 <= x < mod
+ * -mod <= y <= mod
+ */
+static inline int
+modulo_add(int x, int y, int mod)
+{
+  int sum = x + y;
+  ASSERT (0 <= x && x < mod && -mod <= y && y <= mod);
+  if (sum >= mod)
+    sum -= mod;
+  if (sum < 0)
+    sum += mod;
+  return sum;
+}
+
+static inline int
+index_verify (int index, int size, const char *file, int line)
+{
+  if (index < 0 || index >= size)
+    msg (M_FATAL, "Assertion Failed: Array index=%d out of bounds for array size=%d in %s:%d",
+	 index,
+	 size,
+	 file,
+	 line);
+  return index;
+}
+
+#endif
-- 
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