sint.h

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#ifndef SINT
#define SINT
#include <int_s.h>
// 
// Copyright(c) 1993-1996 Tony Kirke
// author="Tony Kirke" *
/*
 * SPUC - Signal processing using C++ - A DSP library
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
namespace SPUC {
//
template <long Bits=32> class sint : public int_s
{
        public:
          sint<Bits>() { 
                  bits=Bits-1;
                  mask = -1 << bits;
          }
          sint<Bits>(long y) { 
                  q = y;
                  bits=Bits-1;
                  mask = -1 << bits;
          }
          inline sint<Bits> operator =(const int_s& y) {   
                q = y.q;
                sign = (y.q & (1 << bits));
                if (  ((mask&q)!=mask) || ((mask&q)!=0) ) {
                        q &= ~mask;
                        if (sign) q |= mask;
                }
       return *this; 
          } 
          inline sint<Bits> operator =(const long& y) { 
                  if (bitpos) {
                          if (y) q |= MASK_BIT(bitpos);
                          else q &= ~MASK_BIT(bitpos);
                          bitpos = 0;
                  } else {
                        q = y;  
                        sign = (y & (1 << bits));
                        if (  ((mask&q)!=mask) || ((mask&q)!=0) ) {
                        q &= ~mask;
                        if (sign) q |= mask;
                        }       
                  }
       return *this; 
          } 
          inline sint<Bits> operator ()(long i) { 
                  bitpos = i;
                  return *this;
          }

};
//template <class m, class m1> inline sint<m>::(const sint<m1>& y) : q(y.q) {}
} // namespace SPUC 
#endif

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