4.3BSD - /usr/src/usr.lib/libplot/hp2648/subr.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)subr.c	5.1 (Berkeley) 5/7/85";
   9: #endif not lint
  10: 
  11: #include <sgtty.h>
  12: #include "hp2648.h"
  13: 
  14: handshake()
  15: {
  16:     int i;
  17:     char ch;
  18: 
  19:     if( shakehands != TRUE )
  20:         return;
  21:     ch = ' ';
  22:     putchar(ENQ);
  23:     fflush(stdout);
  24:     while(1){
  25:         i = read(fildes, &ch, 1);
  26:         if(i < 0)
  27:             continue;
  28:         if(ch == ACK)
  29:             break;
  30:         putchar('Z');
  31:         fflush(stdout);
  32:         stty(fildes, &sarg);
  33:         exit(0);
  34:     }
  35: }
  36: 
  37: buffready(n)
  38: int n;
  39: {
  40:     buffcount = buffcount + n;
  41:     if(buffcount >= 80){
  42:         handshake();
  43:         putchar(ESC);
  44:         putchar(GRAPHIC);
  45:         putchar(PLOT);
  46:         putchar(BINARY);
  47:         buffcount = n+4;
  48:     }
  49: }
  50: 
  51: itoa(num,byte1,byte2)
  52: int num;
  53: char *byte1,*byte2;
  54: {
  55:     *byte1 = (num & 037) | 040;
  56:     *byte2 = ((num>>5) & 037) | 040;
  57: }

Defined functions

Defined variables