//===-- Implementation of tolower------------------------------------------===//
//
// 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/ctype/tolower.h"
#include "src/ctype/ctype_utils.h"

#include "src/__support/common.h"

namespace __llvm_libc {

// TODO: Currently restricted to default locale.
// These should be extended using locale information.
LLVM_LIBC_FUNCTION(int, tolower, (int c)) {
  if (internal::isupper(c))
    return c + 'a' - 'A';
  return c;
}

} // namespace __llvm_libc