usr/src/cmd/refer/refer8.c

   1 /*
   2  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
   7 /*        All Rights Reserved   */
   8
   9 /*
  10  * Copyright (c) 1980 Regents of the University of California.
  11  * All rights reserved. The Berkeley software License Agreement
  12  * specifies the terms and conditions for redistribution.
  13  */
  14
  15 #pragma ident   "%Z%%M% %I%     %E% SMI"
  16
  17 #include "refer..c"
  18
  19 static char ahead[1024];
  20 static int peeked = 0;
  21 static char *noteof = (char *)1;
  22
  23 char *
  24 input(char *s)
  25 {
  26         if (peeked) {
  27                 peeked = 0;
  28                 if (noteof == 0)
  29                         return (0);
  30                 strcpy(s, ahead);
  31                 return (s);
  32         }
  33         return (fgets(s, 1000, in));
  34 }
  35
  36 char *
  37 lookat(void)
  38 {
  39         if (peeked)
  40                 return (ahead);
  41         noteof = input(ahead);
  42         peeked = 1;
  43         return (noteof);
  44 }
  45
  46 void
  47 addch(char *s, char c)
  48 {
  49         while (*s)
  50                 s++;
  51         *s++ = c;
  52         *s = 0;
  53 }