1 //===-- Implementation of fgetc_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/fgetc_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, fgetc_unlocked, (::FILE * stream)) { 18 unsigned char c; 19 auto result = 20 reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->read_unlocked(&c, 1); 21 size_t r = result.value; 22 if (result.has_error()) 23 libc_errno = result.error; 24 if (r != 1) 25 return EOF; 26 return c; 27 } 28 29 } // namespace LIBC_NAMESPACE 30