2.9BSD - /usr/src/ucb/termlib/tputs.c

   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, 5
  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: }

Defined functions

Defined variables