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