4.3BSD - /usr/src/ucb/tn3270/screen.c

   1: /*
   2:  *	Copyright 1984, 1985 by the Regents of the University of
   3:  *	California and by Gregory Glenn Minshall.
   4:  *
   5:  *	Permission to use, copy, modify, and distribute these
   6:  *	programs and their documentation for any purpose and
   7:  *	without fee is hereby granted, provided that this
   8:  *	copyright and permission appear on all copies and
   9:  *	supporting documentation, the name of the Regents of
  10:  *	the University of California not be used in advertising
  11:  *	or publicity pertaining to distribution of the programs
  12:  *	without specific prior permission, and notice be given in
  13:  *	supporting documentation that copying and distribution is
  14:  *	by permission of the Regents of the University of California
  15:  *	and by Gregory Glenn Minshall.  Neither the Regents of the
  16:  *	University of California nor Gregory Glenn Minshall make
  17:  *	representations about the suitability of this software
  18:  *	for any purpose.  It is provided "as is" without
  19:  *	express or implied warranty.
  20:  */
  21: 
  22: 
  23: /* this file implements primitives to drive the screen. */
  24: #ifndef lint
  25: static  char    sccsid[] = "@(#)screen.c	2.1	4/11/85";
  26: #endif	/* ndef lint */
  27: 
  28: #include <stdio.h>
  29: 
  30: #include "screen.h"
  31: #include "3270.h"
  32: 
  33: char CIABuffer[64] = {
  34:     0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
  35:     0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
  36:     0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
  37:     0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
  38:     0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
  39:     0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
  40:     0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
  41:     0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f
  42: };
  43: 
  44: /* These are the routines compiled if we are using a parallel array to hold
  45: 	the field information...
  46:  */
  47: 
  48: /* What is the screen address of the attribute byte for the terminal */
  49: 
  50: WhereTermAttrByte(p)
  51: register int    p;
  52: {
  53:     register int i;
  54: 
  55:     i = p;
  56: 
  57:     do {
  58:     if (TermIsStartField(i)) {
  59:         return(i);
  60:     }
  61:     i = ScreenDec(i);
  62:     } while (i != p);
  63: 
  64:     return(LowestScreen()); /* unformatted screen... */
  65: }
  66: 
  67: /* What we know is that table is of size SCREENSIZE */
  68: 
  69: FieldFind(table, position, failure)
  70: register char *table;       /* which table of bytes to use */
  71: register int position;      /* what position to start from */
  72: int failure;            /* if unformatted, what value to return */
  73: {
  74:     register int ourp;
  75: 
  76:     ourp = position + 1 + bskip(table+position+1, SCREENSIZE-position-1, 0);
  77:     if (ourp < SCREENSIZE) {
  78:     return(ourp);
  79:     }
  80:     /* No fields in table after position.  Look for fields from beginning
  81:      * of table.
  82:      */
  83:     ourp = bskip(table, position+1, 0);
  84:     if (ourp <= position) {
  85:     return(ourp);
  86:     }
  87:     return(failure);
  88: }

Defined functions

Defined variables