1 //===-- 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/File/file.h" 11 12 #include "hdr/types/FILE.h" 13 #include "src/__support/macros/config.h" 14 #include "src/errno/libc_errno.h" 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 LLVM_LIBC_FUNCTION(int, getchar, ()) { 19 unsigned char c; 20 auto result = stdin->read(&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