// Copyright 2016 Google Inc. All Rights Reserved.

//

// 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.

#ifndef BLOATY_TESTS_STRARR_H_

#define BLOATY_TESTS_STRARR_H_

#include <memory>

#include <string>

#include <vector>

// For constructing arrays of strings in the slightly peculiar format

// required by execve().

class StrArr {

 public:

  explicit StrArr(const std::vector<std::string>& strings)

      : size_(strings.size()), array_(new char*[size_ + 1]) {

    array_[size_] = NULL;

    for (size_t i = 0; i < strings.size(); i++) {

      // Can't use c_str() directly because array_ is not const char*.

      array_[i] = strdup(strings[i].c_str());

    }

  }

  ~StrArr() {

    // unique_ptr frees the array of pointers but not the pointed-to strings.

    for (int i = 0; i < size_; i++) {

      free(array_[i]);

    }

  }

  char **get() const { return array_.get(); }

  size_t size() const { return size_; }

 private:

  size_t size_;

  // Can't use vector<char*> because execve() takes ptr to non-const array.

  std::unique_ptr<char*[]> array_;

};

#endif // BLOATY_TESTS_STRARR_H_