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Annotation of 43BSD/usr.lib/libtermlib/tputs.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[] = "@(#)tputs.c    5.1 (Berkeley) 6/5/85";
                      9: #endif not lint
                     10: 
                     11: #include <sgtty.h>
                     12: #include <ctype.h>
                     13: 
                     14: /*
                     15:  * The following array gives the number of tens of milliseconds per
                     16:  * character for each speed as returned by gtty.  Thus since 300
                     17:  * baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
                     18:  */
                     19: static
                     20: short  tmspc10[] = {
                     21:        0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
                     22: };
                     23: 
                     24: short  ospeed;
                     25: char   PC;
                     26: 
                     27: /*
                     28:  * Put the character string cp out, with padding.
                     29:  * The number of affected lines is affcnt, and the routine
                     30:  * used to output one character is outc.
                     31:  */
                     32: tputs(cp, affcnt, outc)
                     33:        register char *cp;
                     34:        int affcnt;
                     35:        int (*outc)();
                     36: {
                     37:        register int i = 0;
                     38:        register int mspc10;
                     39: 
                     40:        if (cp == 0)
                     41:                return;
                     42: 
                     43:        /*
                     44:         * Convert the number representing the delay.
                     45:         */
                     46:        if (isdigit(*cp)) {
                     47:                do
                     48:                        i = i * 10 + *cp++ - '0';
                     49:                while (isdigit(*cp));
                     50:        }
                     51:        i *= 10;
                     52:        if (*cp == '.') {
                     53:                cp++;
                     54:                if (isdigit(*cp))
                     55:                        i += *cp - '0';
                     56:                /*
                     57:                 * Only one digit to the right of the decimal point.
                     58:                 */
                     59:                while (isdigit(*cp))
                     60:                        cp++;
                     61:        }
                     62: 
                     63:        /*
                     64:         * If the delay is followed by a `*', then
                     65:         * multiply by the affected lines count.
                     66:         */
                     67:        if (*cp == '*')
                     68:                cp++, i *= affcnt;
                     69: 
                     70:        /*
                     71:         * The guts of the string.
                     72:         */
                     73:        while (*cp)
                     74:                (*outc)(*cp++);
                     75: 
                     76:        /*
                     77:         * If no delay needed, or output speed is
                     78:         * not comprehensible, then don't try to delay.
                     79:         */
                     80:        if (i == 0)
                     81:                return;
                     82:        if (ospeed <= 0 || ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
                     83:                return;
                     84: 
                     85:        /*
                     86:         * Round up by a half a character frame,
                     87:         * and then do the delay.
                     88:         * Too bad there are no user program accessible programmed delays.
                     89:         * Transmitting pad characters slows many
                     90:         * terminals down and also loads the system.
                     91:         */
                     92:        mspc10 = tmspc10[ospeed];
                     93:        i += mspc10 / 2;
                     94:        for (i /= mspc10; i > 0; i--)
                     95:                (*outc)(PC);
                     96: }

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