25226f3e4a
Apply the formatting rules that were applied to the libc/src directory to the libc/test directory, as well as the files in libc/utils that are included by the tests. This does not include automated enforcement. Reviewed By: sivachandra, lntue Differential Revision: https://reviews.llvm.org/D116127
92 lines
3.5 KiB
C++
92 lines
3.5 KiB
C++
//===-- Unittests for strtod ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/__support/FPUtil/FPBits.h"
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#include "src/stdlib/strtod.h"
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#include "utils/UnitTest/Test.h"
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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class LlvmLibcStrToDTest : public __llvm_libc::testing::Test {
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public:
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void run_test(const char *inputString, const ptrdiff_t expectedStrLen,
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const uint64_t expectedRawData, const int expectedErrno = 0) {
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// expectedRawData is the expected double result as a uint64_t, organized
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// according to IEEE754:
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//
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// +-- 1 Sign Bit +-- 52 Mantissa bits
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// | |
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// | +-------------------------+------------------------+
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// | | |
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// SEEEEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
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// | |
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// +----+----+
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// |
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// +-- 11 Exponent Bits
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//
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// This is so that the result can be compared in parts.
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char *str_end = nullptr;
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__llvm_libc::fputil::FPBits<double> expected_fp =
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__llvm_libc::fputil::FPBits<double>(expectedRawData);
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errno = 0;
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double result = __llvm_libc::strtod(inputString, &str_end);
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__llvm_libc::fputil::FPBits<double> actual_fp =
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__llvm_libc::fputil::FPBits<double>(result);
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EXPECT_EQ(str_end - inputString, expectedStrLen);
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EXPECT_EQ(actual_fp.bits, expected_fp.bits);
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EXPECT_EQ(actual_fp.get_sign(), expected_fp.get_sign());
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EXPECT_EQ(actual_fp.get_exponent(), expected_fp.get_exponent());
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EXPECT_EQ(actual_fp.get_mantissa(), expected_fp.get_mantissa());
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EXPECT_EQ(errno, expectedErrno);
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}
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};
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TEST_F(LlvmLibcStrToDTest, SimpleTest) {
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run_test("123", 3, uint64_t(0x405ec00000000000));
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// This should fail on Eisel-Lemire, forcing a fallback to simple decimal
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// conversion.
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run_test("12345678901234549760", 20, uint64_t(0x43e56a95319d63d8));
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// Found while looking for difficult test cases here:
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// https://github.com/nigeltao/parse-number-fxx-test-data/blob/main/more-test-cases/golang-org-issue-36657.txt
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run_test("1090544144181609348835077142190", 31, uint64_t(0x462b8779f2474dfb));
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run_test("0x123", 5, uint64_t(0x4072300000000000));
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}
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// These are tests that have caused problems in the past.
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TEST_F(LlvmLibcStrToDTest, SpecificFailures) {
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run_test("3E70000000000000", 16, uint64_t(0x7FF0000000000000), ERANGE);
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run_test("358416272e-33", 13, uint64_t(0x3adbbb2a68c9d0b9));
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run_test("2.16656806400000023841857910156251e9", 36,
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uint64_t(0x41e0246690000001));
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run_test("27949676547093071875", 20, uint64_t(0x43f83e132bc608c9));
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}
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TEST_F(LlvmLibcStrToDTest, FuzzFailures) {
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run_test("-\xff\xff\xff\xff\xff\xff\xff\x01", 0, uint64_t(0));
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run_test("-.????", 0, uint64_t(0));
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run_test(
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"44444444444444444444444444444444444444444444444444A44444444444444444"
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"44444444444*\x99\xff\xff\xff\xff",
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50, uint64_t(0x4a3e68fdd0e0b2d8));
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run_test("-NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNKNNNNNNNNNNNNNNNNNN?"
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"NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN?",
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0, uint64_t(0));
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run_test("0x.666E40", 9, uint64_t(0x3fd99b9000000000));
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}
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