// Copyright (c) 2017 Google Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <algorithm>

#include <cstdint>

#include <type_traits>

#include "source/util/string_utils.h"

namespace spvtools {

namespace utils {

std::string CardinalToOrdinal(size_t cardinal) {

  const size_t mod10 = cardinal % 10;

  const size_t mod100 = cardinal % 100;

  std::string suffix;

  if (mod10 == 1 && mod100 != 11)

    suffix = "st";

  else if (mod10 == 2 && mod100 != 12)

    suffix = "nd";

  else if (mod10 == 3 && mod100 != 13)

    suffix = "rd";

  else

    suffix = "th";

  return ToString(cardinal) + suffix;

}

std::pair<std::string, std::string> SplitFlagArgs(const std::string& flag) {

  if (flag.size() < 2) return make_pair(flag, std::string());

  // Detect the last dash before the pass name. Since we have to

  // handle single dash options (-O and -Os), count up to two dashes.

  size_t dash_ix = 0;

  if (flag[0] == '-' && flag[1] == '-')

    dash_ix = 2;

  else if (flag[0] == '-')

    dash_ix = 1;

  size_t ix = flag.find('=');

  return (ix != std::string::npos)

             ? make_pair(flag.substr(dash_ix, ix - 2), flag.substr(ix + 1))

             : make_pair(flag.substr(dash_ix), std::string());

}

}  // namespace utils

}  // namespace spvtools