void TestError_s( void )
{
char error[ 256 ];
size_t errlen;
int violations = NumViolations;
errlen = strerrorlen_s( EBADF );
VERIFY( errlen != 0 );
VERIFY( strerror_s( error, sizeof( error ), EBADF ) == 0 ); /* get an error string */
VERIFY( strlen(error) != 0 );
VERIFY( strerror_s( error, errlen - 1, EBADF ) != 0 ); /* truncated error string */
VERIFY( strcmp( error + errlen - 5, "..." ) == 0 ); /* really truncated? */
VERIFY( NumViolations == violations );
//rt constraints
VERIFY( strerror_s( NULL, errlen - 1, EBADF ) != 0 );
VERIFY( NumViolations == ++violations );
VERIFY( strerror_s( error, 0, EBADF ) != 0 );
VERIFY( NumViolations == ++violations );
#if RSIZE_MAX != SIZE_MAX
VERIFY( strerror_s( error, ~0, EBADF ) != 0 );
VERIFY( NumViolations == ++violations );
#endif
}
/**
* threadsafe, if __STDC_LIB_EXT1__ is available. TODO: UNTESTED!
*/
inline std::string strerror(int errnum)
{
#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L) && ! _GNU_SOURCE
// XSI-compliant strerror_r() function
// int strerror_r(int errnum, char* buf, size_t buflen);
char buf[1024];
int ret = strerror_r(errnum, buf, sizeof(buf));
return buf;
// #else
// GNU-specific strerror_r() function
// char* strerror_r(int errnum, char* buf, size_t buflen);
return strerror_r(errnum, nullptr, 0);
#elif defined(__STDC_LIB_EXT1__)
int length = strerrorlen_s(errnum) + 1;
return_string.resize(length);
strerror_s((char*)return_string.data(), length, errnum);
return return_string;
#else
// #warning "Not threadsafe!"
return strerror(errnum);
#endif
}
