1 //===-- Unittests for bcmp ------------------------------------------------===//
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 "memory_utils/memory_check_utils.h"
10 #include "src/__support/macros/config.h"
11 #include "src/string/bcmp.h"
12 #include "test/UnitTest/Test.h"
13 #include "test/UnitTest/TestLogger.h"
14
15 namespace LIBC_NAMESPACE_DECL {
16
TEST(LlvmLibcBcmpTest,CmpZeroByte)17 TEST(LlvmLibcBcmpTest, CmpZeroByte) {
18 const char *lhs = "ab";
19 const char *rhs = "bc";
20 ASSERT_EQ(LIBC_NAMESPACE::bcmp(lhs, rhs, 0), 0);
21 }
22
TEST(LlvmLibcBcmpTest,LhsRhsAreTheSame)23 TEST(LlvmLibcBcmpTest, LhsRhsAreTheSame) {
24 const char *lhs = "ab";
25 const char *rhs = "ab";
26 ASSERT_EQ(LIBC_NAMESPACE::bcmp(lhs, rhs, 2), 0);
27 }
28
TEST(LlvmLibcBcmpTest,LhsBeforeRhsLexically)29 TEST(LlvmLibcBcmpTest, LhsBeforeRhsLexically) {
30 const char *lhs = "ab";
31 const char *rhs = "ac";
32 ASSERT_NE(LIBC_NAMESPACE::bcmp(lhs, rhs, 2), 0);
33 }
34
TEST(LlvmLibcBcmpTest,LhsAfterRhsLexically)35 TEST(LlvmLibcBcmpTest, LhsAfterRhsLexically) {
36 const char *lhs = "ac";
37 const char *rhs = "ab";
38 ASSERT_NE(LIBC_NAMESPACE::bcmp(lhs, rhs, 2), 0);
39 }
40
41 // Adapt CheckBcmp signature to bcmp.
Adaptor(cpp::span<char> p1,cpp::span<char> p2,size_t size)42 static inline int Adaptor(cpp::span<char> p1, cpp::span<char> p2, size_t size) {
43 return LIBC_NAMESPACE::bcmp(p1.begin(), p2.begin(), size);
44 }
45
TEST(LlvmLibcBcmpTest,SizeSweep)46 TEST(LlvmLibcBcmpTest, SizeSweep) {
47 static constexpr size_t kMaxSize = 400;
48 Buffer Buffer1(kMaxSize);
49 Buffer Buffer2(kMaxSize);
50 Randomize(Buffer1.span());
51 for (size_t size = 0; size < kMaxSize; ++size) {
52 auto span1 = Buffer1.span().subspan(0, size);
53 auto span2 = Buffer2.span().subspan(0, size);
54 const bool OK = CheckBcmp<Adaptor>(span1, span2, size);
55 if (!OK)
56 testing::tlog << "Failed at size=" << size << '\n';
57 ASSERT_TRUE(OK);
58 }
59 }
60
61 } // namespace LIBC_NAMESPACE_DECL
62