FlagSet.cpp

/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/

#include <util/global.h>
#include <util/misc/FlagSet.h>

namespace Util
{

   /*
   * Default constructor.
   */
   FlagSet::FlagSet()
   {}

   /*
   * Constructor, sets allowed string.
   */
   FlagSet::FlagSet(std::string allowed)
   {  setAllowed(allowed); }

   /*
   * Set allowed string, clear actual string.
   */
   void FlagSet::setAllowed(std::string allowed)
   {
      allowed_ = allowed;
      actual_.clear();

      // Create map, initializing isActive to false for all.
      map_.clear();
      char c;
      int n = allowed_.size();
      for (int i=0; i < n; ++i) {
         c = allowed_[i];
         map_.insert(std::pair<char, bool>(c, false));
      }
   }

   /*
   * Set string of actual character flags.
   */
   void FlagSet::setActualOrdered(std::string actual)
   {
      actual_ = actual;

      int n = allowed_.size();
      if (n > 0) {

         // Set isActive to false for all allowed characters
         MapType::iterator iter = map_.begin();
         for ( ; iter != map_.end(); ++iter) {
            iter->second = false;
         }
 
         // Set isActive true for actual characters
         char c, m;
         int j = 0;
         m = allowed_[j];
         for (unsigned int i = 0; i < actual.size(); ++i) {
            c = actual[i];
            while (c != m) {
               ++j;
               if (j == n) {
                  std::string msg = "Unknown character ";
                  msg += c; 
                  UTIL_THROW(msg.c_str());
               }
               m = allowed_[j];
               assert(map_.count(m));
            }
            iter = map_.find(m);
            assert(iter != map_.end());
            iter->second = true;
         }

      }
   }

}