Add m-esr52 at 52.6.0

1 files changed, 87 insertions, 0 deletions

diff --git a/mfbt/tests/TestMathAlgorithms.cpp b/mfbt/tests/TestMathAlgorithms.cpp
new file mode 100644
index 000000000..4e2629cba
--- /dev/null
+++ b/mfbt/tests/TestMathAlgorithms.cpp
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/MathAlgorithms.h"
+
+using mozilla::Clamp;
+using mozilla::IsPowerOfTwo;
+
+static void
+TestClamp()
+{
+  MOZ_RELEASE_ASSERT(Clamp(0, 0, 0) == 0);
+  MOZ_RELEASE_ASSERT(Clamp(1, 0, 0) == 0);
+  MOZ_RELEASE_ASSERT(Clamp(-1, 0, 0) == 0);
+
+  MOZ_RELEASE_ASSERT(Clamp(0, 1, 1) == 1);
+  MOZ_RELEASE_ASSERT(Clamp(0, 1, 2) == 1);
+
+  MOZ_RELEASE_ASSERT(Clamp(0, -1, -1) == -1);
+  MOZ_RELEASE_ASSERT(Clamp(0, -2, -1) == -1);
+
+  MOZ_RELEASE_ASSERT(Clamp(0, 1, 3) == 1);
+  MOZ_RELEASE_ASSERT(Clamp(1, 1, 3) == 1);
+  MOZ_RELEASE_ASSERT(Clamp(2, 1, 3) == 2);
+  MOZ_RELEASE_ASSERT(Clamp(3, 1, 3) == 3);
+  MOZ_RELEASE_ASSERT(Clamp(4, 1, 3) == 3);
+  MOZ_RELEASE_ASSERT(Clamp(5, 1, 3) == 3);
+
+  MOZ_RELEASE_ASSERT(Clamp<uint8_t>(UINT8_MAX, 0, UINT8_MAX) == UINT8_MAX);
+  MOZ_RELEASE_ASSERT(Clamp<uint8_t>(0, 0, UINT8_MAX) == 0);
+
+  MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MIN, INT8_MIN, INT8_MAX) == INT8_MIN);
+  MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MIN, 0, INT8_MAX) == 0);
+  MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MAX, INT8_MIN, INT8_MAX) == INT8_MAX);
+  MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MAX, INT8_MIN, 0) == 0);
+}
+
+static void
+TestIsPowerOfTwo()
+{
+  static_assert(!IsPowerOfTwo(0u), "0 isn't a power of two");
+  static_assert(IsPowerOfTwo(1u), "1 is a power of two");
+  static_assert(IsPowerOfTwo(2u), "2 is a power of two");
+  static_assert(!IsPowerOfTwo(3u), "3 isn't a power of two");
+  static_assert(IsPowerOfTwo(4u), "4 is a power of two");
+  static_assert(!IsPowerOfTwo(5u), "5 isn't a power of two");
+  static_assert(!IsPowerOfTwo(6u), "6 isn't a power of two");
+  static_assert(!IsPowerOfTwo(7u), "7 isn't a power of two");
+  static_assert(IsPowerOfTwo(8u), "8 is a power of two");
+  static_assert(!IsPowerOfTwo(9u), "9 isn't a power of two");
+
+  static_assert(!IsPowerOfTwo(uint8_t(UINT8_MAX/2)), "127, 0x7f isn't a power of two");
+  static_assert(IsPowerOfTwo(uint8_t(UINT8_MAX/2 + 1)), "128, 0x80 is a power of two");
+  static_assert(!IsPowerOfTwo(uint8_t(UINT8_MAX/2 + 2)), "129, 0x81 isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint8_t(UINT8_MAX - 1)), "254, 0xfe isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint8_t(UINT8_MAX)), "255, 0xff isn't a power of two");
+
+  static_assert(!IsPowerOfTwo(uint16_t(UINT16_MAX/2)), "0x7fff isn't a power of two");
+  static_assert(IsPowerOfTwo(uint16_t(UINT16_MAX/2 + 1)), "0x8000 is a power of two");
+  static_assert(!IsPowerOfTwo(uint16_t(UINT16_MAX/2 + 2)), "0x8001 isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint16_t(UINT16_MAX - 1)), "0xfffe isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint16_t(UINT16_MAX)), "0xffff isn't a power of two");
+
+  static_assert(!IsPowerOfTwo(uint32_t(UINT32_MAX/2)), "0x7fffffff isn't a power of two");
+  static_assert(IsPowerOfTwo(uint32_t(UINT32_MAX/2 + 1)), "0x80000000 is a power of two");
+  static_assert(!IsPowerOfTwo(uint32_t(UINT32_MAX/2 + 2)), "0x80000001 isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint32_t(UINT32_MAX - 1)), "0xfffffffe isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint32_t(UINT32_MAX)), "0xffffffff isn't a power of two");
+
+  static_assert(!IsPowerOfTwo(uint64_t(UINT64_MAX/2)), "0x7fffffffffffffff isn't a power of two");
+  static_assert(IsPowerOfTwo(uint64_t(UINT64_MAX/2 + 1)), "0x8000000000000000 is a power of two");
+  static_assert(!IsPowerOfTwo(uint64_t(UINT64_MAX/2 + 2)), "0x8000000000000001 isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint64_t(UINT64_MAX - 1)), "0xfffffffffffffffe isn't a power of two");
+  static_assert(!IsPowerOfTwo(uint64_t(UINT64_MAX)), "0xffffffffffffffff isn't a power of two");
+}
+
+int
+main()
+{
+  TestIsPowerOfTwo();
+  TestClamp();
+
+  return 0;
+}