1//===-- Unittests for nan -------------------------------------------------===//
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 "hdr/signal_macros.h"
10#include "src/__support/FPUtil/FPBits.h"
11#include "src/__support/macros/sanitizer.h"
12#include "src/math/nan.h"
13#include "test/UnitTest/FEnvSafeTest.h"
14#include "test/UnitTest/FPMatcher.h"
15#include "test/UnitTest/Test.h"
16
17class LlvmLibcNanTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
18public:
19 using StorageType = LIBC_NAMESPACE::fputil::FPBits<double>::StorageType;
20
21 void run_test(const char *input_str, StorageType bits) {
22 double result = LIBC_NAMESPACE::nan(input_str);
23 auto actual_fp = LIBC_NAMESPACE::fputil::FPBits<double>(result);
24 auto expected_fp = LIBC_NAMESPACE::fputil::FPBits<double>(bits);
25 EXPECT_EQ(actual_fp.uintval(), expected_fp.uintval());
26 }
27};
28
29TEST_F(LlvmLibcNanTest, NCharSeq) {
30 run_test("", 0x7ff8000000000000);
31 run_test("1234", 0x7ff80000000004d2);
32 run_test("0x1234", 0x7ff8000000001234);
33 run_test("1a", 0x7ff8000000000000);
34 run_test("1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM_",
35 0x7ff8000000000000);
36 run_test("10000000000000000000000000000000000000000000000000",
37 0x7ff8000000000000);
38}
39
40TEST_F(LlvmLibcNanTest, RandomString) {
41 run_test(" 1234", 0x7ff8000000000000);
42 run_test("-1234", 0x7ff8000000000000);
43 run_test("asd&f", 0x7ff8000000000000);
44 run_test("123 ", 0x7ff8000000000000);
45}
46
47#if defined(LIBC_ADD_NULL_CHECKS) && !defined(LIBC_HAS_SANITIZER)
48TEST_F(LlvmLibcNanTest, InvalidInput) {
49 EXPECT_DEATH([] { LIBC_NAMESPACE::nan(nullptr); }, WITH_SIGNAL(-1));
50}
51#endif // LIBC_HAS_ADDRESS_SANITIZER
52

source code of libc/test/src/math/smoke/nan_test.cpp