///////    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 "
                 << -len-1 << " too long\n";
         exit(1);
      }
}


int TextLines::read_lines(istream& in)
{   int k, error=0, m = linelen + 2;
    String buf, s;
    String *lptr = lines, *end = lines + maxlines ;

    if ( (buf = new char[m]) == NULL )
       return(-1);
    while( in.getline(buf, m, '\n') )
    {  k = strlen(buf) + 1; // ??                       // line length
       if ( lptr >= end ) 
       {   error = -1; break; }                    // too many lines      (1)
       else if ( k == m-1 )     
       {   error = (lines-lptr)-2;  break; }       // line too long       (2)
       else if ( (s = new char[k])==NULL )
       {   error = -1; break; }                    // no free store
       else                                        // copy buffer into s
       {   strcpy(s, buf); *lptr++ = s; }          // put s on lines      (3)
    }
    delete [] buf; 
    return(error ? error : lptr-lines);            // error or lines read (4)
}

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

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