text: /**
   * stringproc utility
   *
   * Copyright (C) 2020 Robert ALTNOEDER
   * 
   * Redistribution and use in source and binary forms,
   * with or without modification, are permitted provided that
   * the following conditions are met:
   * 
   *  1. Redistributions of source code must retain the above copyright notice,
   *     this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in
   *     the documentation and/or other materials provided with the distribution.
   *  3. The name of the author may not be used to endorse or promote products
   *     derived from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
   * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  #ifndef STRINGPROC_H
  #define STRINGPROC_H
  
  namespace stringproc
  {
      constexpr int EXIT_ERR_MEM_ALLOC = 2;
  
      class ClArgs
      {
        private:
          int arg_count = 0;
          char** arg_values = nullptr;
  
        public:
          ClArgs(int argc, char** argv);
          virtual ~ClArgs() noexcept;
          virtual bool match(const char* arg_spec) const;
  
          // @throws ArgsException
          virtual void last_arg(int idx) const;
  
          // @throws ArgsException
          virtual const char* get_arg(int idx) const;
      };
  
      class ArgsException : public std::exception
      {
        public:
          virtual ~ArgsException() noexcept;
      };
  }
  
  #endif // STRINGPROC_H
  