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Annotation of researchv10no/libtermlib/tputs.c, revision 1.1.1.1

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

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