diff options
| -rw-r--r-- | googletest/include/gtest/gtest-printers.h | 6 | ||||
| -rw-r--r-- | googletest/src/gtest-printers.cc | 45 | ||||
| -rw-r--r-- | googletest/test/googletest-printers-test.cc | 18 |
3 files changed, 69 insertions, 0 deletions
diff --git a/googletest/include/gtest/gtest-printers.h b/googletest/include/gtest/gtest-printers.h index 98d0494..a28843d 100644 --- a/googletest/include/gtest/gtest-printers.h +++ b/googletest/include/gtest/gtest-printers.h @@ -477,6 +477,12 @@ inline void PrintTo(char8_t c, ::std::ostream* os) { } #endif +// gcc/clang __{u,}int128_t +#if defined(__SIZEOF_INT128__) +GTEST_API_ void PrintTo(__uint128_t v, ::std::ostream* os); +GTEST_API_ void PrintTo(__int128_t v, ::std::ostream* os); +#endif // __SIZEOF_INT128__ + // Overloads for C strings. GTEST_API_ void PrintTo(const char* s, ::std::ostream* os); inline void PrintTo(char* s, ::std::ostream* os) { diff --git a/googletest/src/gtest-printers.cc b/googletest/src/gtest-printers.cc index 41e29cc..0c80ab7 100644 --- a/googletest/src/gtest-printers.cc +++ b/googletest/src/gtest-printers.cc @@ -304,6 +304,51 @@ void PrintTo(char32_t c, ::std::ostream* os) { << static_cast<uint32_t>(c); } +// gcc/clang __{u,}int128_t +#if defined(__SIZEOF_INT128__) +void PrintTo(__uint128_t v, ::std::ostream* os) { + if (v == 0) { + *os << "0"; + return; + } + + // Buffer large enough for ceil(log10(2^128))==39 and the null terminator + char buf[40]; + char* p = buf + sizeof(buf); + + // Some configurations have a __uint128_t, but no support for built in + // division. Do manual long division instead. + + uint64_t high = static_cast<uint64_t>(v >> 64); + uint64_t low = static_cast<uint64_t>(v); + + *--p = 0; + while (high != 0 || low != 0) { + uint64_t high_mod = high % 10; + high = high / 10; + // This is the long division algorithm specialized for a divisor of 10 and + // only two elements. + // Notable values: + // 2^64 / 10 == 1844674407370955161 + // 2^64 % 10 == 6 + const uint64_t carry = 6 * high_mod + low % 10; + low = low / 10 + high_mod * 1844674407370955161 + carry / 10; + + char digit = static_cast<char>(carry % 10); + *--p = '0' + digit; + } + *os << p; +} +void PrintTo(__int128_t v, ::std::ostream* os) { + __uint128_t uv = static_cast<__uint128_t>(v); + if (v < 0) { + *os << "-"; + uv = -uv; + } + PrintTo(uv, os); +} +#endif // __SIZEOF_INT128__ + // Prints the given array of characters to the ostream. CharType must be either // char, char8_t, char16_t, char32_t, or wchar_t. // The array starts at begin, the length is len, it may include '\0' characters diff --git a/googletest/test/googletest-printers-test.cc b/googletest/test/googletest-printers-test.cc index 9c9a223..eb78eab 100644 --- a/googletest/test/googletest-printers-test.cc +++ b/googletest/test/googletest-printers-test.cc @@ -449,6 +449,24 @@ TEST(PrintBuiltInTypeTest, Size_t) { #endif // !GTEST_OS_WINDOWS } +// gcc/clang __{u,}int128_t values. +#if defined(__SIZEOF_INT128__) +TEST(PrintBuiltInTypeTest, Int128) { + // Small ones + EXPECT_EQ("0", Print(__int128_t{0})); + EXPECT_EQ("0", Print(__uint128_t{0})); + EXPECT_EQ("12345", Print(__int128_t{12345})); + EXPECT_EQ("12345", Print(__uint128_t{12345})); + EXPECT_EQ("-12345", Print(__int128_t{-12345})); + + // Large ones + EXPECT_EQ("340282366920938463463374607431768211455", Print(~__uint128_t{})); + __int128_t max_128 = static_cast<__int128_t>(~__uint128_t{} / 2); + EXPECT_EQ("-170141183460469231731687303715884105728", Print(~max_128)); + EXPECT_EQ("170141183460469231731687303715884105727", Print(max_128)); +} +#endif // __SIZEOF_INT128__ + // Floating-points. TEST(PrintBuiltInTypeTest, FloatingPoints) { EXPECT_EQ("1.5", Print(1.5f)); // float |