///////    File: TextLines.C    ///////
#include        <iostream.h>
#include        <string.h>
#include        <stdlib.h>
#include        "TextLines.h"

TextLines::TextLines
(Uint size /* = 1024 */, Uint ll /* = 256 */)
{     maxlines = size;
      linelen = ll;
      lines = new String[size];
}

void TextLines::input(istream& in)
{     len = read_lines(in);
      if (len < 0 )
      {  if (len == -1)
            cerr << "TextLines: Input file too large\n";
         else if (len < 0 )
            cerr << "TextLines: Line "
                 << 1-len << " too long\n";
         exit(1);
      }
}

int TextLines::read_lines(istream& in)
{   int k, m = linelen + 2;
    String buf, s;
    String *lptr = lines, *end = lines + maxlines ;

    buf = new char[ m ];
    while( in.getline(buf, m, '\n') )
    {   k = strlen(buf);       // line length
        if ( lptr >= end )     // too many lines
            return(-1);
        else if ( k == m-1 )   // line too long
            return(lines - lptr);
        else if ( (s = new char[k+1]) == NULL )
            return(-1);        // no free store
        else
        {   strcpy(s, buf);    // copy buffer into s
            *lptr++ = s;       // put s on array lines
        }
    }
    return(lptr - lines);      // total number of lines
}


void TextLines::display()
{ String *lptr = lines,
         *end = lines + maxlines ;
     while(lptr < end) cout << lptr++ << '\n';
}

TextLines::~TextLines()
{ String *lptr = lines;
     while(len-- > 0)
        delete [] *lptr++;
     delete [] lines;
}