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 "src/__support/macros/config.h"
10#include "src/strings/bcmp.h"
11#include "test/UnitTest/Test.h"
12#include "test/UnitTest/TestLogger.h"
13#include "test/src/string/memory_utils/memory_check_utils.h"
14
15namespace LIBC_NAMESPACE_DECL {
16
17TEST(LlvmLibcBcmpTest, CmpZeroByte) {
18 const char *lhs = "ab";
19 const char *rhs = "bc";
20 ASSERT_EQ(LIBC_NAMESPACE::bcmp(lhs, rhs, 0), 0);
21}
22
23TEST(LlvmLibcBcmpTest, LhsRhsAreTheSame) {
24 const char *lhs = "ab";
25 const char *rhs = "ab";
26 ASSERT_EQ(LIBC_NAMESPACE::bcmp(lhs, rhs, 2), 0);
27}
28
29TEST(LlvmLibcBcmpTest, LhsBeforeRhsLexically) {
30 const char *lhs = "ab";
31 const char *rhs = "ac";
32 ASSERT_NE(LIBC_NAMESPACE::bcmp(lhs, rhs, 2), 0);
33}
34
35TEST(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.
42static 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
46TEST(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

source code of libc/test/src/strings/bcmp_test.cpp