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