sys/arch/cobalt/stand/boot/tgets.c

   1 /*      $NetBSD: tgets.c,v 1.2.38.1 2007/10/03 19:23:04 garbled Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)gets.c      8.1 (Berkeley) 6/11/93
  32  */
  33
  34 #include <lib/libsa/stand.h>
  35 #include "boot.h"
  36
  37 #define USE_SCAN
  38
  39 int
  40 tgets(char *buf)
  41 {
  42         int c;
  43         char *lp;
  44
  45 #ifdef  USE_SCAN
  46         int i;
  47
  48 #define SCANWAIT        10000
  49 #define PWAIT           500
  50         for (i = 0; i < PWAIT; i++) {
  51                 if ((c = cnscan()) != -1)
  52                         goto next;
  53                 delay(SCANWAIT / 32); /* XXX */
  54         }
  55         return -1;
  56 next:
  57 #else
  58         c = getchar();
  59 #endif
  60         for (lp = buf;; c = getchar()) {
  61                 switch (c & 0177) {
  62                 case '\n':
  63                 case '\r':
  64                         *lp = '\0';
  65                         putchar('\n');
  66                         return 0;
  67                 case '\b':
  68                 case '\177':
  69                         if (lp > buf) {
  70                                 lp--;
  71                                 putchar('\b');
  72                                 putchar(' ');
  73                                 putchar('\b');
  74                         }
  75                         break;
  76                 case 'r' & 037: {
  77                         char *p;
  78
  79                         putchar('\n');
  80                         for (p = buf; p < lp; ++p)
  81                                 putchar(*p);
  82                         break;
  83                 }
  84                 case 'u' & 037:
  85                 case 'w' & 037:
  86                         lp = buf;
  87                         putchar('\n');
  88                         break;
  89                 default:
  90                         *lp++ = c;
  91                         putchar(c);
  92                 }
  93         }
  94 }