| 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-exception |
| 6 | // |
| 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 | |
| 15 | namespace LIBC_NAMESPACE_DECL { |
| 16 | |
| 17 | LLVM_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_DECL |
| 26 |