33 lines · cpp
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-exception6//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/libc_errno.h"14#include "src/__support/macros/config.h"15#include <stddef.h>16 17namespace LIBC_NAMESPACE_DECL {18 19LLVM_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_DECL33