| //===-- Linux implementation of cfsetispeed -------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/termios/cfsetispeed.h" |
| |
| #include "src/__support/common.h" |
| #include "src/errno/libc_errno.h" |
| |
| #include <termios.h> |
| |
| namespace LIBC_NAMESPACE { |
| |
| LLVM_LIBC_FUNCTION(int, cfsetispeed, (struct termios * t, speed_t speed)) { |
| constexpr speed_t NOT_SPEED_MASK = ~speed_t(CBAUD); |
| // A speed value is valid only if it is equal to one of the B<NN+> values. |
| if (t == nullptr || ((speed & NOT_SPEED_MASK) != 0)) { |
| libc_errno = EINVAL; |
| return -1; |
| } |
| |
| t->c_cflag = (t->c_cflag & NOT_SPEED_MASK) | speed; |
| t->c_ispeed = speed; |
| return 0; |
| } |
| |
| } // namespace LIBC_NAMESPACE |