BitSet.cpp

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id$
 */
#include "antlr/BitSet.hpp"
#include <string>
 
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif
 
BitSet::BitSet(unsigned int nbits)
: storage(nbits)
{
        for (unsigned int i = 0; i < nbits ; i++ )
                storage[i] = false;
}
 
BitSet::BitSet( const unsigned long* bits_, unsigned int nlongs )
: storage(nlongs*32)
{
        for ( unsigned int i = 0 ; i < (nlongs * 32); i++)
                storage[i] = (bits_[i>>5] & (1UL << (i&31))) ? true : false;
}
 
BitSet::~BitSet()
{
}
 
void BitSet::add(unsigned int el)
{
        if( el >= storage.size() )
                storage.resize( el+1, false );
 
        storage[el] = true;
}
 
bool BitSet::member(unsigned int el) const
{
        if ( el >= storage.size())
                return false;
 
        return storage[el];
}
 
ANTLR_USE_NAMESPACE(std)vector<unsigned int> BitSet::toArray() const
{
        ANTLR_USE_NAMESPACE(std)vector<unsigned int> elems;
        for (unsigned int i = 0; i < storage.size(); i++)
        {
                if (storage[i])
                        elems.push_back(i);
        }
 
        return elems;
}
 
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif