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 "src/errno/libc_errno.h" 13 #include <stdio.h> 14 15 namespace LIBC_NAMESPACE { 16 17 LLVM_LIBC_FUNCTION(int, getchar_unlocked, ()) { 18 unsigned char c; 19 auto result = stdin->read_unlocked(&c, 1); 20 if (result.has_error()) 21 libc_errno = result.error; 22 23 if (result.value != 1) 24 return EOF; 25 return c; 26 } 27 28 } // namespace LIBC_NAMESPACE 29