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Unified Diff: base/numerics/safe_numerics_unittest.cc

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/numerics/safe_numerics_unittest.cc
diff --git a/base/numerics/safe_numerics_unittest.cc b/base/numerics/safe_numerics_unittest.cc
deleted file mode 100644
index 6f9a966c0156431e654e71d483d81083fe555690..0000000000000000000000000000000000000000
--- a/base/numerics/safe_numerics_unittest.cc
+++ /dev/null
@@ -1,602 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS)
-#include <mmintrin.h>
-#endif
-#include <stdint.h>
-
-#include <limits>
-
-#include "base/compiler_specific.h"
-#include "base/numerics/safe_conversions.h"
-#include "base/numerics/safe_math.h"
-#include "base/template_util.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using std::numeric_limits;
-using base::CheckedNumeric;
-using base::checked_cast;
-using base::SizeT;
-using base::StrictNumeric;
-using base::saturated_cast;
-using base::strict_cast;
-using base::internal::MaxExponent;
-using base::internal::RANGE_VALID;
-using base::internal::RANGE_INVALID;
-using base::internal::RANGE_OVERFLOW;
-using base::internal::RANGE_UNDERFLOW;
-using base::enable_if;
-
-// These tests deliberately cause arithmetic overflows. If the compiler is
-// aggressive enough, it can const fold these overflows. Disable warnings about
-// overflows for const expressions.
-#if defined(OS_WIN)
-#pragma warning(disable:4756)
-#endif
-
-// Helper macros to wrap displaying the conversion types and line numbers.
-#define TEST_EXPECTED_VALIDITY(expected, actual) \
- EXPECT_EQ(expected, CheckedNumeric<Dst>(actual).validity()) \
- << "Result test: Value " << +(actual).ValueUnsafe() << " as " << dst \
- << " on line " << line;
-
-#define TEST_EXPECTED_VALUE(expected, actual) \
- EXPECT_EQ(static_cast<Dst>(expected), \
- CheckedNumeric<Dst>(actual).ValueUnsafe()) \
- << "Result test: Value " << +((actual).ValueUnsafe()) << " as " << dst \
- << " on line " << line;
-
-// Signed integer arithmetic.
-template <typename Dst>
-static void TestSpecializedArithmetic(
- const char* dst,
- int line,
- typename enable_if<
- numeric_limits<Dst>::is_integer&& numeric_limits<Dst>::is_signed,
- int>::type = 0) {
- typedef numeric_limits<Dst> DstLimits;
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW,
- -CheckedNumeric<Dst>(DstLimits::min()));
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()).Abs());
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(-1).Abs());
-
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::max()) + -1);
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) + -1);
- TEST_EXPECTED_VALIDITY(
- RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(-DstLimits::max()) + -DstLimits::max());
-
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) - 1);
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()) - -1);
- TEST_EXPECTED_VALIDITY(
- RANGE_OVERFLOW,
- CheckedNumeric<Dst>(DstLimits::max()) - -DstLimits::max());
- TEST_EXPECTED_VALIDITY(
- RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(-DstLimits::max()) - DstLimits::max());
-
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) * 2);
-
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) / -1);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(-1) / 2);
-
- // Modulus is legal only for integers.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() % 1);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1);
- TEST_EXPECTED_VALUE(-1, CheckedNumeric<Dst>(-1) % 2);
- TEST_EXPECTED_VALIDITY(RANGE_INVALID, CheckedNumeric<Dst>(-1) % -2);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::min()) % 2);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(DstLimits::max()) % 2);
- // Test all the different modulus combinations.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, 1 % CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1);
- CheckedNumeric<Dst> checked_dst = 1;
- TEST_EXPECTED_VALUE(0, checked_dst %= 1);
-}
-
-// Unsigned integer arithmetic.
-template <typename Dst>
-static void TestSpecializedArithmetic(
- const char* dst,
- int line,
- typename enable_if<
- numeric_limits<Dst>::is_integer && !numeric_limits<Dst>::is_signed,
- int>::type = 0) {
- typedef numeric_limits<Dst> DstLimits;
- TEST_EXPECTED_VALIDITY(RANGE_VALID, -CheckedNumeric<Dst>(DstLimits::min()));
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()).Abs());
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) + -1);
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(DstLimits::min()) - 1);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::min()) * 2);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) / 2);
-
- // Modulus is legal only for integers.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() % 1);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) % 2);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::min()) % 2);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(DstLimits::max()) % 2);
- // Test all the different modulus combinations.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, 1 % CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1);
- CheckedNumeric<Dst> checked_dst = 1;
- TEST_EXPECTED_VALUE(0, checked_dst %= 1);
-}
-
-// Floating point arithmetic.
-template <typename Dst>
-void TestSpecializedArithmetic(
- const char* dst,
- int line,
- typename enable_if<numeric_limits<Dst>::is_iec559, int>::type = 0) {
- typedef numeric_limits<Dst> DstLimits;
- TEST_EXPECTED_VALIDITY(RANGE_VALID, -CheckedNumeric<Dst>(DstLimits::min()));
-
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()).Abs());
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(-1).Abs());
-
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()) + -1);
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::max()) + 1);
- TEST_EXPECTED_VALIDITY(
- RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(-DstLimits::max()) + -DstLimits::max());
-
- TEST_EXPECTED_VALIDITY(
- RANGE_OVERFLOW,
- CheckedNumeric<Dst>(DstLimits::max()) - -DstLimits::max());
- TEST_EXPECTED_VALIDITY(
- RANGE_UNDERFLOW,
- CheckedNumeric<Dst>(-DstLimits::max()) - DstLimits::max());
-
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()) * 2);
-
- TEST_EXPECTED_VALUE(-0.5, CheckedNumeric<Dst>(-1.0) / 2);
- EXPECT_EQ(static_cast<Dst>(1.0), CheckedNumeric<Dst>(1.0).ValueFloating());
-}
-
-// Generic arithmetic tests.
-template <typename Dst>
-static void TestArithmetic(const char* dst, int line) {
- typedef numeric_limits<Dst> DstLimits;
-
- EXPECT_EQ(true, CheckedNumeric<Dst>().IsValid());
- EXPECT_EQ(false,
- CheckedNumeric<Dst>(CheckedNumeric<Dst>(DstLimits::max()) *
- DstLimits::max()).IsValid());
- EXPECT_EQ(static_cast<Dst>(0), CheckedNumeric<Dst>().ValueOrDie());
- EXPECT_EQ(static_cast<Dst>(0), CheckedNumeric<Dst>().ValueOrDefault(1));
- EXPECT_EQ(static_cast<Dst>(1),
- CheckedNumeric<Dst>(CheckedNumeric<Dst>(DstLimits::max()) *
- DstLimits::max()).ValueOrDefault(1));
-
- // Test the operator combinations.
- TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) + CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) - CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) * CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(2, 1 + CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(0, 1 - CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(1, 1 * CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(1, 1 / CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) + 1);
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) - 1);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) * 1);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / 1);
- CheckedNumeric<Dst> checked_dst = 1;
- TEST_EXPECTED_VALUE(2, checked_dst += 1);
- checked_dst = 1;
- TEST_EXPECTED_VALUE(0, checked_dst -= 1);
- checked_dst = 1;
- TEST_EXPECTED_VALUE(1, checked_dst *= 1);
- checked_dst = 1;
- TEST_EXPECTED_VALUE(1, checked_dst /= 1);
-
- // Generic negation.
- TEST_EXPECTED_VALUE(0, -CheckedNumeric<Dst>());
- TEST_EXPECTED_VALUE(-1, -CheckedNumeric<Dst>(1));
- TEST_EXPECTED_VALUE(1, -CheckedNumeric<Dst>(-1));
- TEST_EXPECTED_VALUE(static_cast<Dst>(DstLimits::max() * -1),
- -CheckedNumeric<Dst>(DstLimits::max()));
-
- // Generic absolute value.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>().Abs());
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1).Abs());
- TEST_EXPECTED_VALUE(DstLimits::max(),
- CheckedNumeric<Dst>(DstLimits::max()).Abs());
-
- // Generic addition.
- TEST_EXPECTED_VALUE(1, (CheckedNumeric<Dst>() + 1));
- TEST_EXPECTED_VALUE(2, (CheckedNumeric<Dst>(1) + 1));
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(-1) + 1));
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::min()) + 1);
- TEST_EXPECTED_VALIDITY(
- RANGE_OVERFLOW, CheckedNumeric<Dst>(DstLimits::max()) + DstLimits::max());
-
- // Generic subtraction.
- TEST_EXPECTED_VALUE(-1, (CheckedNumeric<Dst>() - 1));
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(1) - 1));
- TEST_EXPECTED_VALUE(-2, (CheckedNumeric<Dst>(-1) - 1));
- TEST_EXPECTED_VALIDITY(RANGE_VALID,
- CheckedNumeric<Dst>(DstLimits::max()) - 1);
-
- // Generic multiplication.
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>() * 1));
- TEST_EXPECTED_VALUE(1, (CheckedNumeric<Dst>(1) * 1));
- TEST_EXPECTED_VALUE(-2, (CheckedNumeric<Dst>(-1) * 2));
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(0) * 0));
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(-1) * 0));
- TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(0) * -1));
- TEST_EXPECTED_VALIDITY(
- RANGE_OVERFLOW, CheckedNumeric<Dst>(DstLimits::max()) * DstLimits::max());
-
- // Generic division.
- TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() / 1);
- TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / 1);
- TEST_EXPECTED_VALUE(DstLimits::min() / 2,
- CheckedNumeric<Dst>(DstLimits::min()) / 2);
- TEST_EXPECTED_VALUE(DstLimits::max() / 2,
- CheckedNumeric<Dst>(DstLimits::max()) / 2);
-
- TestSpecializedArithmetic<Dst>(dst, line);
-}
-
-// Helper macro to wrap displaying the conversion types and line numbers.
-#define TEST_ARITHMETIC(Dst) TestArithmetic<Dst>(#Dst, __LINE__)
-
-TEST(SafeNumerics, SignedIntegerMath) {
- TEST_ARITHMETIC(int8_t);
- TEST_ARITHMETIC(int);
- TEST_ARITHMETIC(intptr_t);
- TEST_ARITHMETIC(intmax_t);
-}
-
-TEST(SafeNumerics, UnsignedIntegerMath) {
- TEST_ARITHMETIC(uint8_t);
- TEST_ARITHMETIC(unsigned int);
- TEST_ARITHMETIC(uintptr_t);
- TEST_ARITHMETIC(uintmax_t);
-}
-
-TEST(SafeNumerics, FloatingPointMath) {
- TEST_ARITHMETIC(float);
- TEST_ARITHMETIC(double);
-}
-
-// Enumerates the five different conversions types we need to test.
-enum NumericConversionType {
- SIGN_PRESERVING_VALUE_PRESERVING,
- SIGN_PRESERVING_NARROW,
- SIGN_TO_UNSIGN_WIDEN_OR_EQUAL,
- SIGN_TO_UNSIGN_NARROW,
- UNSIGN_TO_SIGN_NARROW_OR_EQUAL,
-};
-
-// Template covering the different conversion tests.
-template <typename Dst, typename Src, NumericConversionType conversion>
-struct TestNumericConversion {};
-
-// EXPECT_EQ wrappers providing specific detail on test failures.
-#define TEST_EXPECTED_RANGE(expected, actual) \
- EXPECT_EQ(expected, base::internal::DstRangeRelationToSrcRange<Dst>(actual)) \
- << "Conversion test: " << src << " value " << actual << " to " << dst \
- << " on line " << line;
-
-template <typename Dst, typename Src>
-struct TestNumericConversion<Dst, Src, SIGN_PRESERVING_VALUE_PRESERVING> {
- static void Test(const char *dst, const char *src, int line) {
- typedef numeric_limits<Src> SrcLimits;
- typedef numeric_limits<Dst> DstLimits;
- // Integral to floating.
- static_assert((DstLimits::is_iec559 && SrcLimits::is_integer) ||
- // Not floating to integral and...
- (!(DstLimits::is_integer && SrcLimits::is_iec559) &&
- // Same sign, same numeric, source is narrower or same.
- ((SrcLimits::is_signed == DstLimits::is_signed &&
- sizeof(Dst) >= sizeof(Src)) ||
- // Or signed destination and source is smaller
- (DstLimits::is_signed && sizeof(Dst) > sizeof(Src)))),
- "Comparison must be sign preserving and value preserving");
-
- const CheckedNumeric<Dst> checked_dst = SrcLimits::max();
- ;
- TEST_EXPECTED_VALIDITY(RANGE_VALID, checked_dst);
- if (MaxExponent<Dst>::value > MaxExponent<Src>::value) {
- if (MaxExponent<Dst>::value >= MaxExponent<Src>::value * 2 - 1) {
- // At least twice larger type.
- TEST_EXPECTED_VALIDITY(RANGE_VALID, SrcLimits::max() * checked_dst);
-
- } else { // Larger, but not at least twice as large.
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW, SrcLimits::max() * checked_dst);
- TEST_EXPECTED_VALIDITY(RANGE_VALID, checked_dst + 1);
- }
- } else { // Same width type.
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW, checked_dst + 1);
- }
-
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
- if (SrcLimits::is_iec559) {
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max() * static_cast<Src>(-1));
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity());
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1);
- TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN());
- } else if (numeric_limits<Src>::is_signed) {
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1));
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::min());
- }
- }
-};
-
-template <typename Dst, typename Src>
-struct TestNumericConversion<Dst, Src, SIGN_PRESERVING_NARROW> {
- static void Test(const char *dst, const char *src, int line) {
- typedef numeric_limits<Src> SrcLimits;
- typedef numeric_limits<Dst> DstLimits;
- static_assert(SrcLimits::is_signed == DstLimits::is_signed,
- "Destination and source sign must be the same");
- static_assert(sizeof(Dst) < sizeof(Src) ||
- (DstLimits::is_integer && SrcLimits::is_iec559),
- "Destination must be narrower than source");
-
- const CheckedNumeric<Dst> checked_dst;
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW, checked_dst + SrcLimits::max());
- TEST_EXPECTED_VALUE(1, checked_dst + static_cast<Src>(1));
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW, checked_dst - SrcLimits::max());
-
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
- if (SrcLimits::is_iec559) {
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::max() * -1);
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1));
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity());
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1);
- TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN());
- } else if (SrcLimits::is_signed) {
- TEST_EXPECTED_VALUE(-1, checked_dst - static_cast<Src>(1));
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::min());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1));
- } else {
- TEST_EXPECTED_VALIDITY(RANGE_INVALID, checked_dst - static_cast<Src>(1));
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::min());
- }
- }
-};
-
-template <typename Dst, typename Src>
-struct TestNumericConversion<Dst, Src, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL> {
- static void Test(const char *dst, const char *src, int line) {
- typedef numeric_limits<Src> SrcLimits;
- typedef numeric_limits<Dst> DstLimits;
- static_assert(sizeof(Dst) >= sizeof(Src),
- "Destination must be equal or wider than source.");
- static_assert(SrcLimits::is_signed, "Source must be signed");
- static_assert(!DstLimits::is_signed, "Destination must be unsigned");
-
- const CheckedNumeric<Dst> checked_dst;
- TEST_EXPECTED_VALUE(SrcLimits::max(), checked_dst + SrcLimits::max());
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW, checked_dst + static_cast<Src>(-1));
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW, checked_dst + -SrcLimits::max());
-
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::min());
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, static_cast<Src>(-1));
- }
-};
-
-template <typename Dst, typename Src>
-struct TestNumericConversion<Dst, Src, SIGN_TO_UNSIGN_NARROW> {
- static void Test(const char *dst, const char *src, int line) {
- typedef numeric_limits<Src> SrcLimits;
- typedef numeric_limits<Dst> DstLimits;
- static_assert((DstLimits::is_integer && SrcLimits::is_iec559) ||
- (sizeof(Dst) < sizeof(Src)),
- "Destination must be narrower than source.");
- static_assert(SrcLimits::is_signed, "Source must be signed.");
- static_assert(!DstLimits::is_signed, "Destination must be unsigned.");
-
- const CheckedNumeric<Dst> checked_dst;
- TEST_EXPECTED_VALUE(1, checked_dst + static_cast<Src>(1));
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW, checked_dst + SrcLimits::max());
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW, checked_dst + static_cast<Src>(-1));
- TEST_EXPECTED_VALIDITY(RANGE_UNDERFLOW, checked_dst + -SrcLimits::max());
-
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, static_cast<Src>(-1));
- if (SrcLimits::is_iec559) {
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::max() * -1);
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity());
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1);
- TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN());
- } else {
- TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::min());
- }
- }
-};
-
-template <typename Dst, typename Src>
-struct TestNumericConversion<Dst, Src, UNSIGN_TO_SIGN_NARROW_OR_EQUAL> {
- static void Test(const char *dst, const char *src, int line) {
- typedef numeric_limits<Src> SrcLimits;
- typedef numeric_limits<Dst> DstLimits;
- static_assert(sizeof(Dst) <= sizeof(Src),
- "Destination must be narrower or equal to source.");
- static_assert(!SrcLimits::is_signed, "Source must be unsigned.");
- static_assert(DstLimits::is_signed, "Destination must be signed.");
-
- const CheckedNumeric<Dst> checked_dst;
- TEST_EXPECTED_VALUE(1, checked_dst + static_cast<Src>(1));
- TEST_EXPECTED_VALIDITY(RANGE_OVERFLOW, checked_dst + SrcLimits::max());
- TEST_EXPECTED_VALUE(SrcLimits::min(), checked_dst + SrcLimits::min());
-
- TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::min());
- TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max());
- TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
- }
-};
-
-// Helper macro to wrap displaying the conversion types and line numbers
-#define TEST_NUMERIC_CONVERSION(d, s, t) \
- TestNumericConversion<d, s, t>::Test(#d, #s, __LINE__)
-
-TEST(SafeNumerics, IntMinOperations) {
- TEST_NUMERIC_CONVERSION(int8_t, int8_t, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(uint8_t, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING);
-
- TEST_NUMERIC_CONVERSION(int8_t, int, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(uint8_t, unsigned int, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(int8_t, float, SIGN_PRESERVING_NARROW);
-
- TEST_NUMERIC_CONVERSION(uint8_t, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
-
- TEST_NUMERIC_CONVERSION(uint8_t, int, SIGN_TO_UNSIGN_NARROW);
- TEST_NUMERIC_CONVERSION(uint8_t, intmax_t, SIGN_TO_UNSIGN_NARROW);
- TEST_NUMERIC_CONVERSION(uint8_t, float, SIGN_TO_UNSIGN_NARROW);
-
- TEST_NUMERIC_CONVERSION(int8_t, unsigned int, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
- TEST_NUMERIC_CONVERSION(int8_t, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
-}
-
-TEST(SafeNumerics, IntOperations) {
- TEST_NUMERIC_CONVERSION(int, int, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(unsigned int, unsigned int,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(int, int8_t, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(unsigned int, uint8_t,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(int, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING);
-
- TEST_NUMERIC_CONVERSION(int, intmax_t, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(unsigned int, uintmax_t, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(int, float, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(int, double, SIGN_PRESERVING_NARROW);
-
- TEST_NUMERIC_CONVERSION(unsigned int, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
- TEST_NUMERIC_CONVERSION(unsigned int, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
-
- TEST_NUMERIC_CONVERSION(unsigned int, intmax_t, SIGN_TO_UNSIGN_NARROW);
- TEST_NUMERIC_CONVERSION(unsigned int, float, SIGN_TO_UNSIGN_NARROW);
- TEST_NUMERIC_CONVERSION(unsigned int, double, SIGN_TO_UNSIGN_NARROW);
-
- TEST_NUMERIC_CONVERSION(int, unsigned int, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
- TEST_NUMERIC_CONVERSION(int, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
-}
-
-TEST(SafeNumerics, IntMaxOperations) {
- TEST_NUMERIC_CONVERSION(intmax_t, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(uintmax_t, uintmax_t,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(intmax_t, int, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(uintmax_t, unsigned int,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(intmax_t, unsigned int,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(intmax_t, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING);
-
- TEST_NUMERIC_CONVERSION(intmax_t, float, SIGN_PRESERVING_NARROW);
- TEST_NUMERIC_CONVERSION(intmax_t, double, SIGN_PRESERVING_NARROW);
-
- TEST_NUMERIC_CONVERSION(uintmax_t, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
- TEST_NUMERIC_CONVERSION(uintmax_t, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
-
- TEST_NUMERIC_CONVERSION(uintmax_t, float, SIGN_TO_UNSIGN_NARROW);
- TEST_NUMERIC_CONVERSION(uintmax_t, double, SIGN_TO_UNSIGN_NARROW);
-
- TEST_NUMERIC_CONVERSION(intmax_t, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
-}
-
-TEST(SafeNumerics, FloatOperations) {
- TEST_NUMERIC_CONVERSION(float, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(float, uintmax_t,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(float, int, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(float, unsigned int,
- SIGN_PRESERVING_VALUE_PRESERVING);
-
- TEST_NUMERIC_CONVERSION(float, double, SIGN_PRESERVING_NARROW);
-}
-
-TEST(SafeNumerics, DoubleOperations) {
- TEST_NUMERIC_CONVERSION(double, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(double, uintmax_t,
- SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(double, int, SIGN_PRESERVING_VALUE_PRESERVING);
- TEST_NUMERIC_CONVERSION(double, unsigned int,
- SIGN_PRESERVING_VALUE_PRESERVING);
-}
-
-TEST(SafeNumerics, SizeTOperations) {
- TEST_NUMERIC_CONVERSION(size_t, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL);
- TEST_NUMERIC_CONVERSION(int, size_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL);
-}
-
-TEST(SafeNumerics, CastTests) {
-// MSVC catches and warns that we're forcing saturation in these tests.
-// Since that's intentional, we need to shut this warning off.
-#if defined(COMPILER_MSVC)
-#pragma warning(disable : 4756)
-#endif
-
- int small_positive = 1;
- int small_negative = -1;
- double double_small = 1.0;
- double double_large = numeric_limits<double>::max();
- double double_infinity = numeric_limits<float>::infinity();
- double double_large_int = numeric_limits<int>::max();
- double double_small_int = numeric_limits<int>::min();
-
- // Just test that the casts compile, since the other tests cover logic.
- EXPECT_EQ(0, checked_cast<int>(static_cast<size_t>(0)));
- EXPECT_EQ(0, strict_cast<int>(static_cast<char>(0)));
- EXPECT_EQ(0, strict_cast<int>(static_cast<unsigned char>(0)));
- EXPECT_EQ(0U, strict_cast<unsigned>(static_cast<unsigned char>(0)));
- EXPECT_EQ(1ULL, static_cast<uint64_t>(StrictNumeric<size_t>(1U)));
- EXPECT_EQ(1ULL, static_cast<uint64_t>(SizeT(1U)));
- EXPECT_EQ(1U, static_cast<size_t>(StrictNumeric<unsigned>(1U)));
-
- EXPECT_TRUE(CheckedNumeric<uint64_t>(StrictNumeric<unsigned>(1U)).IsValid());
- EXPECT_TRUE(CheckedNumeric<int>(StrictNumeric<unsigned>(1U)).IsValid());
- EXPECT_FALSE(CheckedNumeric<unsigned>(StrictNumeric<int>(-1)).IsValid());
-
- // These casts and coercions will fail to compile:
- // EXPECT_EQ(0, strict_cast<int>(static_cast<size_t>(0)));
- // EXPECT_EQ(0, strict_cast<size_t>(static_cast<int>(0)));
- // EXPECT_EQ(1ULL, StrictNumeric<size_t>(1));
- // EXPECT_EQ(1, StrictNumeric<size_t>(1U));
-
- // Test various saturation corner cases.
- EXPECT_EQ(saturated_cast<int>(small_negative),
- static_cast<int>(small_negative));
- EXPECT_EQ(saturated_cast<int>(small_positive),
- static_cast<int>(small_positive));
- EXPECT_EQ(saturated_cast<unsigned>(small_negative),
- static_cast<unsigned>(0));
- EXPECT_EQ(saturated_cast<int>(double_small),
- static_cast<int>(double_small));
- EXPECT_EQ(saturated_cast<int>(double_large), numeric_limits<int>::max());
- EXPECT_EQ(saturated_cast<float>(double_large), double_infinity);
- EXPECT_EQ(saturated_cast<float>(-double_large), -double_infinity);
- EXPECT_EQ(numeric_limits<int>::min(), saturated_cast<int>(double_small_int));
- EXPECT_EQ(numeric_limits<int>::max(), saturated_cast<int>(double_large_int));
-}
-
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