1 //===-- MemoryMatcher.cpp ---------------------------------------*- C++ -*-===//
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 "MemoryMatcher.h"
10
11 #include "test/UnitTest/Test.h"
12
13 #if LIBC_TEST_HAS_MATCHERS()
14
15 using LIBC_NAMESPACE::testing::tlog;
16
17 namespace LIBC_NAMESPACE {
18 namespace testing {
19
20 template <typename T>
equals(const cpp::span<T> & Span1,const cpp::span<T> & Span2,bool & mismatch_size,size_t & mismatch_index)21 bool equals(const cpp::span<T> &Span1, const cpp::span<T> &Span2,
22 bool &mismatch_size, size_t &mismatch_index) {
23 if (Span1.size() != Span2.size()) {
24 mismatch_size = true;
25 return false;
26 }
27 for (size_t Index = 0; Index < Span1.size(); ++Index)
28 if (Span1[Index] != Span2[Index]) {
29 mismatch_index = Index;
30 return false;
31 }
32 return true;
33 }
34
match(MemoryView actualValue)35 bool MemoryMatcher::match(MemoryView actualValue) {
36 actual = actualValue;
37 return equals(expected, actual, mismatch_size, mismatch_index);
38 }
39
display(char C)40 static void display(char C) {
41 const auto print = [](unsigned char I) {
42 tlog << static_cast<char>(I < 10 ? '0' + I : 'A' + I - 10);
43 };
44 print(static_cast<unsigned char>(C) / 16);
45 print(static_cast<unsigned char>(C) & 15);
46 }
47
display(MemoryView View)48 static void display(MemoryView View) {
49 for (auto C : View) {
50 tlog << ' ';
51 display(C);
52 }
53 }
54
explainError()55 void MemoryMatcher::explainError() {
56 if (mismatch_size) {
57 tlog << "Size mismatch :";
58 tlog << "expected : ";
59 tlog << expected.size();
60 tlog << '\n';
61 tlog << "actual : ";
62 tlog << actual.size();
63 tlog << '\n';
64 } else {
65 tlog << "Mismatch at position : ";
66 tlog << mismatch_index;
67 tlog << " / ";
68 tlog << expected.size();
69 tlog << "\n";
70 tlog << "expected :";
71 display(expected);
72 tlog << '\n';
73 tlog << "actual :";
74 display(actual);
75 tlog << '\n';
76 }
77 }
78
79 } // namespace testing
80 } // namespace LIBC_NAMESPACE
81
82 #endif // LIBC_TEST_HAS_MATCHERS()
83