35 lines · cpp
1//===-- Implementation of putc --------------------------------------------===//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/putc.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, putc, (int c, ::FILE *stream)) {20 unsigned char uc = static_cast<unsigned char>(c);21 22 auto result = reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->write(&uc, 1);23 if (result.has_error())24 libc_errno = result.error;25 size_t written = result.value;26 27 if (1 != written) {28 // The stream should be in an error state in this case.29 return EOF;30 }31 return 0;32}33 34} // namespace LIBC_NAMESPACE_DECL35