From bbfe603e5ae42317a2b67d713d00882bea341c88 Mon Sep 17 00:00:00 2001
From: Jim Flynn <jim.flynn@arm.com>
Date: Mon, 20 Jul 2020 16:57:44 +0100
Subject: IVGCVSW-5166 Pull out the common and server side code into standalone
 libraries

Change-Id: I180f84c493a9b2be4b93b25d312ebdd9e71b1735
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
---
 profiling/common/include/NumericCast.hpp | 128 +++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 profiling/common/include/NumericCast.hpp

(limited to 'profiling/common/include/NumericCast.hpp')

diff --git a/profiling/common/include/NumericCast.hpp b/profiling/common/include/NumericCast.hpp
new file mode 100644
index 0000000000..069f9514fe
--- /dev/null
+++ b/profiling/common/include/NumericCast.hpp
@@ -0,0 +1,128 @@
+//
+// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "Assert.hpp"
+
+#include <type_traits>
+#include <limits>
+
+namespace arm
+{
+
+namespace pipe
+{
+
+#if !defined(NDEBUG) || defined(ARM_PIPE_NUMERIC_CAST_TESTABLE)
+#define ENABLE_NUMERIC_CAST_CHECKS 1
+#else
+#define ENABLE_NUMERIC_CAST_CHECKS 0
+#endif
+
+#if defined(ARM_PIPE_NUMERIC_CAST_TESTABLE)
+#   define ARM_PIPE_NUMERIC_CAST_CHECK(cond, msg) ConditionalThrow<std::bad_cast>(cond)
+#else
+#   define ARM_PIPE_NUMERIC_CAST_CHECK(cond, msg) ARM_PIPE_ASSERT_MSG(cond, msg)
+#endif
+
+template<typename Dest, typename Source>
+typename std::enable_if_t<
+    std::is_unsigned<Source>::value &&
+    std::is_unsigned<Dest>::value
+    , Dest>
+numeric_cast(Source source)
+{
+#if ENABLE_NUMERIC_CAST_CHECKS
+    if (source > std::numeric_limits<Dest>::max())
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting unsigned type to "
+                                        "narrower unsigned type. Overflow detected.");
+    }
+#endif // ENABLE_NUMERIC_CAST_CHECKS
+
+    return static_cast<Dest>(source);
+}
+
+template<typename Dest, typename Source>
+typename std::enable_if_t<
+    std::is_signed<Source>::value &&
+    std::is_signed<Dest>::value
+    , Dest>
+numeric_cast(Source source)
+{
+    static_assert(!std::is_floating_point<Source>::value && !std::is_floating_point<Dest>::value,
+        "numeric_cast doesn't cast float.");
+
+#if ENABLE_NUMERIC_CAST_CHECKS
+    if (source > std::numeric_limits<Dest>::max())
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting signed type to narrower signed type. "
+                                        "Overflow detected.");
+    }
+
+    if (source < std::numeric_limits<Dest>::lowest())
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting signed type to narrower signed type. "
+                                        "Underflow detected.");
+    }
+#endif // ENABLE_NUMERIC_CAST_CHECKS
+
+    return static_cast<Dest>(source);
+}
+
+// numeric cast from unsigned to signed checked for narrowing overflows
+template<typename Dest, typename Source>
+typename std::enable_if_t<
+    std::is_signed<Dest>::value &&
+    std::is_unsigned<Source>::value
+    , Dest>
+numeric_cast(Source sValue)
+{
+    static_assert(!std::is_floating_point<Dest>::value, "numeric_cast doesn't cast to float.");
+
+#if ENABLE_NUMERIC_CAST_CHECKS
+    if (sValue > static_cast< typename std::make_unsigned<Dest>::type >(std::numeric_limits<Dest>::max()))
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting unsigned type to signed type. "
+                                        "Overflow detected.");
+    }
+#endif // ENABLE_NUMERIC_CAST_CHECKS
+
+    return static_cast<Dest>(sValue);
+}
+
+// numeric cast from signed to unsigned checked for underflows and narrowing overflows
+template<typename Dest, typename Source>
+typename std::enable_if_t<
+    std::is_unsigned<Dest>::value &&
+    std::is_signed<Source>::value
+    , Dest>
+numeric_cast(Source sValue)
+{
+    static_assert(!std::is_floating_point<Source>::value && !std::is_floating_point<Dest>::value,
+        "numeric_cast doesn't cast floats.");
+
+#if ENABLE_NUMERIC_CAST_CHECKS
+    if (sValue < 0)
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting negative value to unsigned type. "
+                                        "Underflow detected.");
+    }
+
+    if (static_cast< typename std::make_unsigned<Source>::type >(sValue) > std::numeric_limits<Dest>::max())
+    {
+        ARM_PIPE_NUMERIC_CAST_CHECK(false, "numeric_cast failed casting signed type to unsigned type. "
+                                        "Overflow detected.");
+    }
+
+#endif // ENABLE_NUMERIC_CAST_CHECKS
+    return static_cast<Dest>(sValue);
+}
+
+#undef ENABLE_NUMERIC_CAST_CHECKS
+
+} // namespace pipe
+} // namespace arm
-- 
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