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