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Annotation of 43BSD/usr.lib/libplot/hp2648/subr.c, revision 1.1.1.1

1.1       root        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: }

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