1 // RUN: %check_clang_tidy %s bugprone-string-literal-with-embedded-nul %t
2
3 namespace std {
4 template <typename T>
5 class allocator {};
6 template <typename T>
7 class char_traits {};
8 template <typename C, typename T, typename A>
9 struct basic_string {
10 typedef basic_string<C, T, A> _Type;
11 basic_string();
12 basic_string(const C *p, const A &a = A());
13
14 _Type& operator+=(const C* s);
15 _Type& operator=(const C* s);
16 };
17
18 typedef basic_string<char, std::char_traits<char>, std::allocator<char>> string;
19 typedef basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t>> wstring;
20 }
21
22 bool operator==(const std::string&, const char*);
23 bool operator==(const char*, const std::string&);
24
25
26 const char Valid[] = "This is valid \x12.";
27 const char Strange[] = "This is strange \0x12 and must be fixed";
28 // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: suspicious embedded NUL character [bugprone-string-literal-with-embedded-nul]
29
30 const char textA[] = "\0x01\0x02\0x03\0x04";
31 // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious embedded NUL character
32 const wchar_t textW[] = L"\0x01\0x02\0x03\0x04";
33 // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: suspicious embedded NUL character
34
35 const char A[] = "\0";
36 const char B[] = "\0x";
37 const char C[] = "\0x1";
38 const char D[] = "\0x11";
39 // CHECK-MESSAGES: :[[@LINE-1]]:18: warning: suspicious embedded NUL character
40
41 const wchar_t E[] = L"\0";
42 const wchar_t F[] = L"\0x";
43 const wchar_t G[] = L"\0x1";
44 const wchar_t H[] = L"\0x11";
45 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: suspicious embedded NUL character
46
47 const char I[] = "\000\000\000\000";
48 const char J[] = "\0\0\0\0\0\0";
49 const char K[] = "";
50
51 const char L[] = "\0x12" "\0x12" "\0x12" "\0x12";
52 // CHECK-MESSAGES: :[[@LINE-1]]:18: warning: suspicious embedded NUL character
53
TestA()54 void TestA() {
55 std::string str1 = "abc\0def";
56 // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: truncated string literal
57 std::string str2 = "\0";
58 // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: truncated string literal
59 std::string str3("\0");
60 // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: truncated string literal
61 std::string str4{"\x00\x01\x02\x03"};
62 // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: truncated string literal
63
64 std::string str;
65 str += "abc\0def";
66 // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: truncated string literal
67 str = "abc\0def";
68 // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: truncated string literal
69
70 if (str == "abc\0def") return;
71 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: truncated string literal
72 if ("abc\0def" == str) return;
73 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: truncated string literal
74 }
75
TestW()76 void TestW() {
77 std::wstring str1 = L"abc\0def";
78 // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: truncated string literal
79 std::wstring str2 = L"\0";
80 // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: truncated string literal
81 std::wstring str3(L"\0");
82 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: truncated string literal
83 std::wstring str4{L"\x00\x01\x02\x03"};
84 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: truncated string literal
85 }
86