Disabled external gits

cs440-acg/ext/openexr/OpenEXR/IlmImf/ImfCheckedArithmetic.h

@@ -0,0 +1,163 @@
+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2009, Industrial Light & Magic, a division of Lucas
+// Digital Ltd. LLC
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+#ifndef INCLUDED_IMF_CHECKED_ARITHMETIC_H
+#define INCLUDED_IMF_CHECKED_ARITHMETIC_H
+
+//-----------------------------------------------------------------------------
+//
+//	Integer arithmetic operations that throw exceptions
+//      on overflow, underflow or division by zero.
+//
+//-----------------------------------------------------------------------------
+
+#include <limits>
+#include "IexMathExc.h"
+#include "ImfNamespace.h"
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
+
+template <bool b> struct StaticAssertionFailed;
+template <> struct StaticAssertionFailed <true> {};
+
+#define IMF_STATIC_ASSERT(x) \
+    do {StaticAssertionFailed <x> staticAssertionFailed; ((void) staticAssertionFailed);} while (false)
+
+
+template <class T>
+T
+uiMult (T a, T b)
+{
+    //
+    // Unsigned integer multiplication
+    //
+
+    IMF_STATIC_ASSERT (!std::numeric_limits<T>::is_signed &&
+                        std::numeric_limits<T>::is_integer);
+
+    if (a > 0 && b > std::numeric_limits<T>::max() / a)
+        throw IEX_NAMESPACE::OverflowExc ("Integer multiplication overflow.");
+
+    return a * b;
+}
+
+
+template <class T>
+T
+uiDiv (T a, T b)
+{
+    //
+    // Unsigned integer division
+    //
+
+    IMF_STATIC_ASSERT (!std::numeric_limits<T>::is_signed &&
+                        std::numeric_limits<T>::is_integer);
+
+    if (b == 0)
+        throw IEX_NAMESPACE::DivzeroExc ("Integer division by zero.");
+
+    return a / b;
+}
+
+
+template <class T>
+T
+uiAdd (T a, T b)
+{
+    //
+    // Unsigned integer addition
+    //
+
+    IMF_STATIC_ASSERT (!std::numeric_limits<T>::is_signed &&
+                        std::numeric_limits<T>::is_integer);
+
+    if (a > std::numeric_limits<T>::max() - b)
+        throw IEX_NAMESPACE::OverflowExc ("Integer addition overflow.");
+
+    return a + b;
+}
+
+
+template <class T>
+T
+uiSub (T a, T b)
+{
+    //
+    // Unsigned integer subtraction
+    //
+
+    IMF_STATIC_ASSERT (!std::numeric_limits<T>::is_signed &&
+                        std::numeric_limits<T>::is_integer);
+
+    if (a < b)
+        throw IEX_NAMESPACE::UnderflowExc ("Integer subtraction underflow.");
+
+    return a - b;
+}
+
+
+template <class T>
+size_t
+checkArraySize (T n, size_t s)
+{
+    //
+    // Verify that the size, in bytes, of an array with n elements
+    // of size s can be computed without overflowing:
+    //
+    // If computing
+    //
+    //      size_t (n) * s
+    //
+    // would overflow, then throw an IEX_NAMESPACE::OverflowExc exception.
+    // Otherwise return
+    //
+    //      size_t (n).
+    //
+
+    IMF_STATIC_ASSERT (!std::numeric_limits<T>::is_signed &&
+                        std::numeric_limits<T>::is_integer);
+
+    IMF_STATIC_ASSERT (sizeof (T) <= sizeof (size_t));
+
+    if (size_t (n) > std::numeric_limits<size_t>::max() / s)
+        throw IEX_NAMESPACE::OverflowExc ("Integer multiplication overflow.");
+
+    return size_t (n);
+}
+
+
+OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
+
+
+#endif