// Oldham, Jeffrey D.
// 2000Mar13
// CS1321

// Brain-Dead String Editor

// based on Eric Roberts's \emph{Programming Abstractions in C}, chapter~9.

#include <iostream.h>
#include <stdlib.h>		// has EXIT_SUCCESS
#include <ctype.h>		// has tolower()
#include "buffer.h"
#include <mcheck.h>

#define STRLNG 1000		// can't use string class; mtrace problem
#include <string.h>		// has C-string functions

int main()
{
  mtrace();
  buffer b;
  char command[STRLNG];

  cerr << "prompt> ";
  while (cin.getline(command, STRLNG)) {
    if (strlen(command) > 0) {
      char c = tolower(command[0]);
      if (c == 'b') b.backCursor();
      else if (c == 'f') b.forwardCursor();
      else if (c == 'd') b.deleteChar();
      else if (c == 'i') b.insertChars(command+1);
				// extract all but the first character
      else if (c == '^') b.front();
      else if (c == '$') b.back();
      else if (c == '#') ;	// ignore comments
      else if (c == 'q') return EXIT_SUCCESS; // quit
      else 
	cerr << "Illegal command\n";
    }
    cout << b << endl;
    printCursor(cout, b) << endl;
    cerr << "prompt> ";
  }

  return EXIT_SUCCESS;
}