1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <cstring>
11
12 #include <cstring>
13 #include <type_traits>
14
15 #include "test_macros.h"
16
17 #ifndef NULL
18 #error NULL not defined
19 #endif
20
main()21 int main()
22 {
23 std::size_t s = 0;
24 void* vp = 0;
25 const void* vpc = 0;
26 char* cp = 0;
27 const char* cpc = 0;
28
29 ASSERT_SAME_TYPE(void*, decltype(std::memcpy(vp, vpc, s)));
30 ASSERT_SAME_TYPE(void*, decltype(std::memmove(vp, vpc, s)));
31 ASSERT_SAME_TYPE(char*, decltype(std::strcpy(cp, cpc)));
32 ASSERT_SAME_TYPE(char*, decltype(std::strncpy(cp, cpc, s)));
33 ASSERT_SAME_TYPE(char*, decltype(std::strcat(cp, cpc)));
34 ASSERT_SAME_TYPE(char*, decltype(std::strncat(cp, cpc, s)));
35 ASSERT_SAME_TYPE(int, decltype(std::memcmp(vpc, vpc, s)));
36 ASSERT_SAME_TYPE(int, decltype(std::strcmp(cpc, cpc)));
37 ASSERT_SAME_TYPE(int, decltype(std::strncmp(cpc, cpc, s)));
38 ASSERT_SAME_TYPE(int, decltype(std::strcoll(cpc, cpc)));
39 ASSERT_SAME_TYPE(std::size_t, decltype(std::strxfrm(cp, cpc, s)));
40 ASSERT_SAME_TYPE(void*, decltype(std::memchr(vp, 0, s)));
41 ASSERT_SAME_TYPE(char*, decltype(std::strchr(cp, 0)));
42 ASSERT_SAME_TYPE(std::size_t, decltype(std::strcspn(cpc, cpc)));
43 ASSERT_SAME_TYPE(char*, decltype(std::strpbrk(cp, cpc)));
44 ASSERT_SAME_TYPE(char*, decltype(std::strrchr(cp, 0)));
45 ASSERT_SAME_TYPE(std::size_t, decltype(std::strspn(cpc, cpc)));
46 ASSERT_SAME_TYPE(char*, decltype(std::strstr(cp, cpc)));
47 #ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
48 ASSERT_SAME_TYPE(char*, decltype(std::strtok(cp, cpc)));
49 #endif
50 ASSERT_SAME_TYPE(void*, decltype(std::memset(vp, 0, s)));
51 ASSERT_SAME_TYPE(char*, decltype(std::strerror(0)));
52 ASSERT_SAME_TYPE(std::size_t, decltype(std::strlen(cpc)));
53
54 // These tests fail on systems whose C library doesn't provide a correct overload
55 // set for strchr, strpbrk, strrchr, strstr, and memchr, unless the compiler is
56 // a suitably recent version of Clang.
57 #if !defined(__APPLE__) || defined(_LIBCPP_PREFERRED_OVERLOAD)
58 ASSERT_SAME_TYPE(const void*, decltype(std::memchr(vpc, 0, s)));
59 ASSERT_SAME_TYPE(const char*, decltype(std::strchr(cpc, 0)));
60 ASSERT_SAME_TYPE(const char*, decltype(std::strpbrk(cpc, cpc)));
61 ASSERT_SAME_TYPE(const char*, decltype(std::strrchr(cpc, 0)));
62 ASSERT_SAME_TYPE(const char*, decltype(std::strstr(cpc, cpc)));
63 #endif
64 }
65