/**
 * resrever - a program that reverses its imput lines in a bit of a
 *   more exterme fashion.  (resrever = reverse(reverser))
 */

// +---------+--------------------------------------------------------
// | Headers |
// +---------+

#include <stdio.h>              // For printf and gets and such.
#include <string.h>             // For strchr

#include "string-utils.h"       // For string_reverse


// +-----------+------------------------------------------------------
// | Constants |
// +-----------+

/**
 * The maximum number of characters per line.
 */
#define LINE_WIDTH 128


// +---------+--------------------------------------------------------
// | Helpers |
// +---------+

/**
 * The kernel.  Recurse and print until you run out of lines.
 */
static void
kernel ()
{
  char line[LINE_WIDTH+2];      // One line of text: line width + newline + \0
                                // LINE_WIDTH would also be acceptable.

  // Try to read a line.
  if (fgets (line, LINE_WIDTH+1, stdin) == NULL)
    return;

  // Reverse the remaining lines
  kernel ();

  // Drop the newline
  char *eol = strchr (line, '\n');
  if (eol != NULL)
    *eol = '\0';

  // Reverse the current line
  string_reverse (line);
  printf ("%s\n", line);
} // kernel


// +------+-----------------------------------------------------------
// | Main |
// +------+

int
main ()
{
  // Do the work
  kernel ();

  // And we're done
  return 0;
} // main