26 lines · cpp
1//===-- Baremetal implementation of getchar -------------------------------===//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.h"10#include "src/__support/OSUtil/io.h"11#include "src/__support/macros/config.h"12 13#include "hdr/stdio_macros.h" // for EOF.14 15namespace LIBC_NAMESPACE_DECL {16 17LLVM_LIBC_FUNCTION(int, getchar, ()) {18 char buf[1];19 auto result = read_from_stdin(buf, sizeof(buf));20 if (result <= 0)21 return EOF;22 return buf[0];23}24 25} // namespace LIBC_NAMESPACE_DECL26