| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // See bugs.llvm.org/PR20183 |
| // |
| // XFAIL: with_system_cxx_lib=macosx10.11 |
| // XFAIL: with_system_cxx_lib=macosx10.10 |
| // XFAIL: with_system_cxx_lib=macosx10.9 |
| // XFAIL: with_system_cxx_lib=macosx10.8 |
| // XFAIL: with_system_cxx_lib=macosx10.7 |
| |
| // <random> |
| |
| // class random_device; |
| |
| // explicit random_device(const string& token = implementation-defined); |
| |
| // For the following ctors, the standard states: "The semantics and default |
| // value of the token parameter are implementation-defined". Implementations |
| // therefore aren't required to accept any string, but the default shouldn't |
| // throw. |
| |
| #include <random> |
| #include <system_error> |
| #include <cassert> |
| |
| #if !defined(_WIN32) |
| #include <unistd.h> |
| #endif |
| |
| #include "test_macros.h" |
| |
| |
| bool is_valid_random_device(const std::string &token) { |
| #if defined(_LIBCPP_USING_DEV_RANDOM) |
| // Not an exhaustive list: they're the only tokens that are tested below. |
| return token == "/dev/urandom" || token == "/dev/random"; |
| #else |
| return token == "/dev/urandom"; |
| #endif |
| } |
| |
| void check_random_device_valid(const std::string &token) { |
| std::random_device r(token); |
| } |
| |
| void check_random_device_invalid(const std::string &token) { |
| #ifndef TEST_HAS_NO_EXCEPTIONS |
| try { |
| std::random_device r(token); |
| LIBCPP_ASSERT(false); |
| } catch (const std::system_error&) { |
| } |
| #else |
| ((void)token); |
| #endif |
| } |
| |
| |
| int main(int, char**) { |
| { |
| std::random_device r; |
| } |
| { |
| std::string token = "wrong file"; |
| check_random_device_invalid(token); |
| } |
| { |
| std::string token = "/dev/urandom"; |
| if (is_valid_random_device(token)) |
| check_random_device_valid(token); |
| else |
| check_random_device_invalid(token); |
| } |
| { |
| std::string token = "/dev/random"; |
| if (is_valid_random_device(token)) |
| check_random_device_valid(token); |
| else |
| check_random_device_invalid(token); |
| } |
| #if !defined(_WIN32) |
| // Test that random_device(const string&) properly handles getting |
| // a file descriptor with the value '0'. Do this by closing the standard |
| // streams so that the descriptor '0' is available. |
| { |
| int ec; |
| ec = close(STDIN_FILENO); |
| assert(!ec); |
| ec = close(STDOUT_FILENO); |
| assert(!ec); |
| ec = close(STDERR_FILENO); |
| assert(!ec); |
| std::random_device r; |
| } |
| #endif // !defined(_WIN32) |
| |
| return 0; |
| } |