proposition for more

[Jani Averbach]

Hi!

I have made a little modification to grub, so that it's cat has some of
more's capabilities
(space = next screen, return = next line, esc = ending, line wrapping).

What do you think, does grub need more? =)
And if it does, cat with more or cat and more?

Q1: How should I print to place (x,y) = (80,y) in the screen?
grub_putchar() seems make shift when place 80 has been reached.

Q2: There is no predefined max size for terminal, is there?


Here is the story so far:

(builtins.c: 402)

#define JAA_TERM_X_SIZE 80
#define JAA_TERM_Y_SIZE 25
/* cat */
static int
cat_func (char *arg, int flags)
{
  char c;
  int key;
  int lines = 0;
  int linechars = 0;

  if (! grub_open (arg))
    return 1;

  while (grub_read (&c, 1)){

      if ('\n' == c){
          linechars = 0;
          ++lines;
      }

      if (linechars > JAA_TERM_X_SIZE-1){
          grub_putchar ('\n');
          ++lines;
          linechars = 0;
      }
      else
          ++linechars;

      if (lines > JAA_TERM_Y_SIZE-1){
          key = getkey();
          /* If ESC is returned, then abort this entry.  */
          if (ASCII_CHAR (key) == 27)
              break;
          /* if ENTER is returned, then scroll down by one */
          else if(ASCII_CHAR (key) == 10 || ASCII_CHAR(key) == 13)
              --lines;
          else
              lines = 0;
      }

      grub_putchar (c);
  }

  grub_close ();
  return 0;
}
#undef JAA_TERM_X_SIZE 80
#undef JAA_TERM_Y_SIZE 25

BR, Jani

--
Jani Averbach