30 lines · cpp
1//===-- Implementation of getchar_unlocked --------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/stdio/getchar_unlocked.h"10#include "src/__support/File/file.h"11 12#include "hdr/types/FILE.h"13#include "src/__support/libc_errno.h"14#include "src/__support/macros/config.h"15 16namespace LIBC_NAMESPACE_DECL {17 18LLVM_LIBC_FUNCTION(int, getchar_unlocked, ()) {19 unsigned char c;20 auto result = stdin->read_unlocked(&c, 1);21 if (result.has_error())22 libc_errno = result.error;23 24 if (result.value != 1)25 return EOF;26 return c;27}28 29} // namespace LIBC_NAMESPACE_DECL30