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Annotation of 42BSD/usr.lib/libtermlib/tputs.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)tputs.c    4.1 (Berkeley) 6/27/83";
                      3: #endif
                      4: 
                      5: /* Copyright (c) 1979 Regents of the University of California */
                      6: #include <sgtty.h>
                      7: #include <ctype.h>
                      8: 
                      9: /*
                     10:  * The following array gives the number of tens of milliseconds per
                     11:  * character for each speed as returned by gtty.  Thus since 300
                     12:  * baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
                     13:  */
                     14: static
                     15: short  tmspc10[] = {
                     16:        0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
                     17: };
                     18: 
                     19: short  ospeed;
                     20: char   PC;
                     21: 
                     22: /*
                     23:  * Put the character string cp out, with padding.
                     24:  * The number of affected lines is affcnt, and the routine
                     25:  * used to output one character is outc.
                     26:  */
                     27: tputs(cp, affcnt, outc)
                     28:        register char *cp;
                     29:        int affcnt;
                     30:        int (*outc)();
                     31: {
                     32:        register int i = 0;
                     33:        register int mspc10;
                     34: 
                     35:        if (cp == 0)
                     36:                return;
                     37: 
                     38:        /*
                     39:         * Convert the number representing the delay.
                     40:         */
                     41:        if (isdigit(*cp)) {
                     42:                do
                     43:                        i = i * 10 + *cp++ - '0';
                     44:                while (isdigit(*cp));
                     45:        }
                     46:        i *= 10;
                     47:        if (*cp == '.') {
                     48:                cp++;
                     49:                if (isdigit(*cp))
                     50:                        i += *cp - '0';
                     51:                /*
                     52:                 * Only one digit to the right of the decimal point.
                     53:                 */
                     54:                while (isdigit(*cp))
                     55:                        cp++;
                     56:        }
                     57: 
                     58:        /*
                     59:         * If the delay is followed by a `*', then
                     60:         * multiply by the affected lines count.
                     61:         */
                     62:        if (*cp == '*')
                     63:                cp++, i *= affcnt;
                     64: 
                     65:        /*
                     66:         * The guts of the string.
                     67:         */
                     68:        while (*cp)
                     69:                (*outc)(*cp++);
                     70: 
                     71:        /*
                     72:         * If no delay needed, or output speed is
                     73:         * not comprehensible, then don't try to delay.
                     74:         */
                     75:        if (i == 0)
                     76:                return;
                     77:        if (ospeed <= 0 || ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
                     78:                return;
                     79: 
                     80:        /*
                     81:         * Round up by a half a character frame,
                     82:         * and then do the delay.
                     83:         * Too bad there are no user program accessible programmed delays.
                     84:         * Transmitting pad characters slows many
                     85:         * terminals down and also loads the system.
                     86:         */
                     87:        mspc10 = tmspc10[ospeed];
                     88:        i += mspc10 / 2;
                     89:        for (i /= mspc10; i > 0; i--)
                     90:                (*outc)(PC);
                     91: }

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