///////    File LcdFace.C    ///////
#include  "LcdFace.h"
#include  <iostream.h>
#include  <strstream.h>
#include  <string.h>

LcdFace::LcdFace(const int d, const char* k)
:  CalcFace(d, k)
{    
     cw = new CalcWindow(d);
}

LcdFace::~LcdFace()
{   delete cw;
}

void LcdFace::build_number(char c, int& i)
{  static int leading_0 = 0;
   static int before_point = 1;
      if ( i == 0 )          // reset
      {   leading_0 = 0; before_point = 1;
          cw->clear_lcd();
      }
      if ( leading_0 && c == '0' )
          return;            // ignore extra leading zero
      if ( i == 0 && c == '0' )
          leading_0 = 1;     // first leading zero
      else
          leading_0 = 0;
      if ( before_point )
      {   if ( c == '.' )
          {   before_point = 0;
              if ( i == 0 ) nbuf[i++] = '0';
              nbuf[i++] = c;
          }
          else if ( i == 1 && nbuf[0] == '0' )
              nbuf[0] = c;
          else 
          {   nbuf[i++] = c;
              nbuf[i] = '.';
          }
      }
      else  // after point
      {   if ( c == '.' ) return;
          nbuf[i++] = c;
      }
      if ( before_point ) nbuf[i+1] = '\0';
      else nbuf[i]= '\0';
      show_str(nbuf);
}

void LcdFace::show_number(double n)
{     static int width = prec+2;
      cw->clear_lcd();
      if ( n == 0.0 ) show_str("0.");
      else
      {    ostrstream os(nbuf, width, ios::out);
           os.precision(prec);
           os.width(width);
           os << n << "";        // put n as string in buf
           show_str(nbuf);
      }
}