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Annotation of researchv10no/ncurses/screen/_delay.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1979 Regents of the University of California */
                      2: /*     @(#) _delay.c: 1.1 10/15/83     (1.9    3/6/83) */
                      3: #include <ctype.h>
                      4: #include "curses.h"
                      5: #include "term.h"
                      6: #ifdef NONSTANDARD
                      7: # include "ns_curses.h"
                      8: #endif
                      9: 
                     10: /*
                     11:  * The following array gives the number of tens of milliseconds per
                     12:  * character for each speed as returned by gtty.  Thus since 300
                     13:  * baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
                     14:  */
                     15: static
                     16: short  tmspc10[] = {
                     17:        /* 0   50    75   110 134.5 150  200  300   baud */
                     18:           0, 2000, 1333, 909, 743, 666, 500, 333,
                     19:        /* 600 1200 1800 2400 4800 9600 19200 38400 baud */
                     20:           166, 83,  55,  41,  20,  10,   5,    2
                     21: };
                     22: 
                     23: /*
                     24:  * Insert a delay into the output stream for "delay/10" milliseconds.
                     25:  * Round up by a half a character frame, and then do the delay.
                     26:  * Too bad there are no user program accessible programmed delays.
                     27:  * Transmitting pad characters slows many terminals down and also
                     28:  * loads the system.
                     29:  */
                     30: _delay(delay, outc)
                     31: register int delay;
                     32: int (*outc)();
                     33: {
                     34:        register int mspc10;
                     35:        register int pc;
                     36:        register int outspeed;
                     37: 
                     38: #ifndef        NONSTANDARD
                     39: # ifdef USG
                     40:        outspeed = cur_term->Nttyb.c_cflag&CBAUD;
                     41: # else
                     42:        outspeed = cur_term->Nttyb.sg_ospeed;
                     43: # endif
                     44: #else          NONSTANDARD
                     45:        outspeed = outputspeed(cur_term);
                     46: #endif         NONSTANDARD
                     47:        if (outspeed <= 0 || outspeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
                     48:                return ERR;
                     49: 
                     50:        mspc10 = tmspc10[outspeed];
                     51:        delay += mspc10 / 2;
                     52:        if (pad_char)
                     53:                pc = *pad_char;
                     54:        else
                     55:                pc = 0;
                     56:        for (delay /= mspc10; delay > 0; delay--)
                     57:                (*outc)(pc);
                     58:        return OK;
                     59: }

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