1 //===-- Unittests for atof ------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "src/__support/FPUtil/FPBits.h"
10 #include "src/stdlib/atof.h"
11
12 #include "utils/UnitTest/Test.h"
13
14 #include <errno.h>
15 #include <limits.h>
16 #include <stddef.h>
17
18 // This is just a simple test to make sure that this function works at all. It's
19 // functionally identical to strtod so the bulk of the testing is there.
TEST(LlvmLibcAToFTest,SimpleTest)20 TEST(LlvmLibcAToFTest, SimpleTest) {
21 __llvm_libc::fputil::FPBits<double> expected_fp =
22 __llvm_libc::fputil::FPBits<double>(uint64_t(0x405ec00000000000));
23
24 errno = 0;
25 double result = __llvm_libc::atof("123");
26
27 __llvm_libc::fputil::FPBits<double> actual_fp =
28 __llvm_libc::fputil::FPBits<double>(result);
29
30 EXPECT_EQ(actual_fp.bits, expected_fp.bits);
31 EXPECT_EQ(actual_fp.get_sign(), expected_fp.get_sign());
32 EXPECT_EQ(actual_fp.get_exponent(), expected_fp.get_exponent());
33 EXPECT_EQ(actual_fp.get_mantissa(), expected_fp.get_mantissa());
34 EXPECT_EQ(errno, 0);
35 }
36
TEST(LlvmLibcAToFTest,FailedParsingTest)37 TEST(LlvmLibcAToFTest, FailedParsingTest) {
38 __llvm_libc::fputil::FPBits<double> expected_fp =
39 __llvm_libc::fputil::FPBits<double>(uint64_t(0));
40
41 errno = 0;
42 double result = __llvm_libc::atof("???");
43
44 __llvm_libc::fputil::FPBits<double> actual_fp =
45 __llvm_libc::fputil::FPBits<double>(result);
46
47 EXPECT_EQ(actual_fp.bits, expected_fp.bits);
48 EXPECT_EQ(actual_fp.get_sign(), expected_fp.get_sign());
49 EXPECT_EQ(actual_fp.get_exponent(), expected_fp.get_exponent());
50 EXPECT_EQ(actual_fp.get_mantissa(), expected_fp.get_mantissa());
51 EXPECT_EQ(errno, 0);
52 }
53