1 //===-- Implementation of getc_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/getc_unlocked.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 #include <stddef.h> 16 17 namespace LIBC_NAMESPACE_DECL { 18 19 LLVM_LIBC_FUNCTION(int, getc_unlocked, (::FILE * stream)) { 20 unsigned char c; 21 auto result = 22 reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->read_unlocked(&c, 1); 23 size_t r = result.value; 24 if (result.has_error()) 25 libc_errno = result.error; 26 27 if (r != 1) 28 return EOF; 29 return c; 30 } 31 32 } // namespace LIBC_NAMESPACE_DECL 33