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-exception
6//
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_DECL
30

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source code of libc/src/stdio/generic/getchar_unlocked.cpp