BSD 4_1c_2 development

[unix-history] / usr / src / usr.lib / libtermlib / tputs.c

/* Copyright (c) 1979 Regents of the University of California */
#include <sgtty.h>
#include <ctype.h>

/*
* The following array gives the number of tens of milliseconds per
* character for each speed as returned by gtty.  Thus since 300
* baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
*/
static
short   tmspc10[] = {
       0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10
};

short   ospeed;
char    PC;

/*
* Put the character string cp out, with padding.
* The number of affected lines is affcnt, and the routine
* used to output one character is outc.
*/
tputs(cp, affcnt, outc)
       register char *cp;
       int affcnt;
       int (*outc)();
{
       register int i = 0;
       register int mspc10;

       if (cp == 0)
               return;

       /*
        * Convert the number representing the delay.
        */
       if (isdigit(*cp)) {
               do
                       i = i * 10 + *cp++ - '0';
               while (isdigit(*cp));
       }
       i *= 10;
       if (*cp == '.') {
               cp++;
               if (isdigit(*cp))
                       i += *cp - '0';
               /*
                * Only one digit to the right of the decimal point.
                */
               while (isdigit(*cp))
                       cp++;
       }

       /*
        * If the delay is followed by a `*', then
        * multiply by the affected lines count.
        */
       if (*cp == '*')
               cp++, i *= affcnt;

       /*
        * The guts of the string.
        */
       while (*cp)
               (*outc)(*cp++);

       /*
        * If no delay needed, or output speed is
        * not comprehensible, then don't try to delay.
        */
       if (i == 0)
               return;
       if (ospeed <= 0 || ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
               return;

       /*
        * Round up by a half a character frame,
        * and then do the delay.
        * Too bad there are no user program accessible programmed delays.
        * Transmitting pad characters slows many
        * terminals down and also loads the system.
        */
       mspc10 = tmspc10[ospeed];
       i += mspc10 / 2;
       for (i /= mspc10; i > 0; i--)
               (*outc)(PC);
}