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//===-- Linux implementation of cfsetospeed -------------------------------===//
//
// 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/cfsetospeed.h"
#include "src/errno/libc_errno.h"
#include "src/__support/common.h"
#include <termios.h>
namespace __llvm_libc {
LLVM_LIBC_FUNCTION(int, cfsetospeed, (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_ospeed = speed;
return 0;
}
} // namespace __llvm_libc
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