| //===-- Unittests for memcmp ----------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "memory_utils/memory_check_utils.h" |
| #include "src/string/memcmp.h" |
| #include "test/UnitTest/Test.h" |
| #include "test/UnitTest/TestLogger.h" |
| |
| namespace LIBC_NAMESPACE { |
| |
| TEST(LlvmLibcMemcmpTest, CmpZeroByte) { |
| const char *lhs = "ab"; |
| const char *rhs = "yz"; |
| EXPECT_EQ(LIBC_NAMESPACE::memcmp(lhs, rhs, 0), 0); |
| } |
| |
| TEST(LlvmLibcMemcmpTest, LhsRhsAreTheSame) { |
| const char *lhs = "ab"; |
| const char *rhs = "ab"; |
| EXPECT_EQ(LIBC_NAMESPACE::memcmp(lhs, rhs, 2), 0); |
| } |
| |
| TEST(LlvmLibcMemcmpTest, LhsBeforeRhsLexically) { |
| const char *lhs = "ab"; |
| const char *rhs = "az"; |
| EXPECT_LT(LIBC_NAMESPACE::memcmp(lhs, rhs, 2), 0); |
| } |
| |
| TEST(LlvmLibcMemcmpTest, LhsAfterRhsLexically) { |
| const char *lhs = "az"; |
| const char *rhs = "ab"; |
| EXPECT_GT(LIBC_NAMESPACE::memcmp(lhs, rhs, 2), 0); |
| } |
| |
| TEST(LlvmLibcMemcmpTest, Issue77080) { |
| // https://github.com/llvm/llvm-project/issues/77080 |
| constexpr char lhs[35] = "1.069cd68bbe76eb2143a3284d27ebe220"; |
| constexpr char rhs[35] = "1.0500185b5d966a544e2d0fa40701b0f3"; |
| ASSERT_GE(LIBC_NAMESPACE::memcmp(lhs, rhs, 34), 1); |
| } |
| |
| // Adapt CheckMemcmp signature to memcmp. |
| static inline int Adaptor(cpp::span<char> p1, cpp::span<char> p2, size_t size) { |
| return LIBC_NAMESPACE::memcmp(p1.begin(), p2.begin(), size); |
| } |
| |
| TEST(LlvmLibcMemcmpTest, SizeSweep) { |
| static constexpr size_t kMaxSize = 400; |
| Buffer Buffer1(kMaxSize); |
| Buffer Buffer2(kMaxSize); |
| Randomize(Buffer1.span()); |
| for (size_t size = 0; size < kMaxSize; ++size) { |
| auto span1 = Buffer1.span().subspan(0, size); |
| auto span2 = Buffer2.span().subspan(0, size); |
| const bool OK = CheckMemcmp<Adaptor>(span1, span2, size); |
| if (!OK) |
| testing::tlog << "Failed at size=" << size << '\n'; |
| ASSERT_TRUE(OK); |
| } |
| } |
| |
| } // namespace LIBC_NAMESPACE |