//===-- 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_l.h"

#include "src/__support/CPP/limits.h"
#include "src/__support/common.h"
#include "src/__support/ctype_utils.h"
#include "src/__support/macros/config.h"

namespace LIBC_NAMESPACE_DECL {

LLVM_LIBC_FUNCTION(int, tolower_l, (int c, locale_t)) {
  if (c < cpp::numeric_limits<char>::min() ||
      c > cpp::numeric_limits<char>::max()) {
    return c;
  }
  return static_cast<int>(internal::tolower(static_cast<char>(c)));
}

} // namespace LIBC_NAMESPACE_DECL
