libc/src/stdio/generic/fputs.cpp

//===-- Implementation of fputs -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "src/stdio/fputs.h"
#include "src/__support/CPP/string_view.h"
#include "src/__support/File/file.h"

#include "hdr/types/FILE.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include <stddef.h>

namespace LIBC_NAMESPACE_DECL {

LLVM_LIBC_FUNCTION(int, fputs,
                   (const char *__restrict str, ::FILE *__restrict stream)) {
  cpp::string_view str_view(str);

  auto result = reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->write(
      str, str_view.size());
  if (result.has_error())
    libc_errno = result.error;
  size_t written = result.value;

  if (str_view.size() != written) {
    // The stream should be in an error state in this case.
    return EOF;
  }
  return 0;
}

} // namespace LIBC_NAMESPACE_DECL