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Annotation of 43BSDReno/lib/libterm/tputs.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)tputs.c    5.3 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: #include <sgtty.h>
                     25: #include <ctype.h>
                     26: 
                     27: /*
                     28:  * The following array gives the number of tens of milliseconds per
                     29:  * character for each speed as returned by gtty.  Thus since 300
                     30:  * baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
                     31:  */
                     32: static
                     33: short  tmspc10[] = {
                     34:        0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
                     35: };
                     36: 
                     37: short  ospeed;
                     38: char   PC;
                     39: 
                     40: /*
                     41:  * Put the character string cp out, with padding.
                     42:  * The number of affected lines is affcnt, and the routine
                     43:  * used to output one character is outc.
                     44:  */
                     45: tputs(cp, affcnt, outc)
                     46:        register char *cp;
                     47:        int affcnt;
                     48:        int (*outc)();
                     49: {
                     50:        register int i = 0;
                     51:        register int mspc10;
                     52: 
                     53:        if (cp == 0)
                     54:                return;
                     55: 
                     56:        /*
                     57:         * Convert the number representing the delay.
                     58:         */
                     59:        if (isdigit(*cp)) {
                     60:                do
                     61:                        i = i * 10 + *cp++ - '0';
                     62:                while (isdigit(*cp));
                     63:        }
                     64:        i *= 10;
                     65:        if (*cp == '.') {
                     66:                cp++;
                     67:                if (isdigit(*cp))
                     68:                        i += *cp - '0';
                     69:                /*
                     70:                 * Only one digit to the right of the decimal point.
                     71:                 */
                     72:                while (isdigit(*cp))
                     73:                        cp++;
                     74:        }
                     75: 
                     76:        /*
                     77:         * If the delay is followed by a `*', then
                     78:         * multiply by the affected lines count.
                     79:         */
                     80:        if (*cp == '*')
                     81:                cp++, i *= affcnt;
                     82: 
                     83:        /*
                     84:         * The guts of the string.
                     85:         */
                     86:        while (*cp)
                     87:                (*outc)(*cp++);
                     88: 
                     89:        /*
                     90:         * If no delay needed, or output speed is
                     91:         * not comprehensible, then don't try to delay.
                     92:         */
                     93:        if (i == 0)
                     94:                return;
                     95:        if (ospeed <= 0 || ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
                     96:                return;
                     97: 
                     98:        /*
                     99:         * Round up by a half a character frame,
                    100:         * and then do the delay.
                    101:         * Too bad there are no user program accessible programmed delays.
                    102:         * Transmitting pad characters slows many
                    103:         * terminals down and also loads the system.
                    104:         */
                    105:        mspc10 = tmspc10[ospeed];
                    106:        i += mspc10 / 2;
                    107:        for (i /= mspc10; i > 0; i--)
                    108:                (*outc)(PC);
                    109: }

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