games/larn/help.c

   1 /*      $NetBSD: help.c,v 1.7 2008/02/03 21:24:58 dholland Exp $        */
   2
   3 /* help.c               Larn is copyrighted 1986 by Noah Morgan. */
   4 #include <sys/cdefs.h>
   5 #ifndef lint
   6 __RCSID("$NetBSD: help.c,v 1.7 2008/02/03 21:24:58 dholland Exp $");
   7 #endif /* not lint */
   8
   9 #include <unistd.h>
  10
  11 #include "header.h"
  12 #include "extern.h"
  13
  14 static void retcont(void);
  15 static int openhelp(void);
  16
  17 /*
  18  *      help function to display the help info
  19  *
  20  *      format of the .larn.help file
  21  *
  22  *      1st character of file:  # of pages of help available (ascii digit)
  23  *      page (23 lines) for the introductory message (not counted in above)
  24  *      pages of help text (23 lines per page)
  25  */
  26 void
  27 help()
  28 {
  29         int    i, j;
  30 #ifndef VT100
  31         char            tmbuf[128];     /* intermediate translation buffer
  32                                          * when not a VT100 */
  33 #endif  /* VT100 */
  34         if ((j = openhelp()) < 0)
  35                 return;         /* open the help file and get # pages */
  36         for (i = 0; i < 23; i++)
  37                 lgetl();        /* skip over intro message */
  38         for (; j > 0; j--) {
  39                 clear();
  40                 for (i = 0; i < 23; i++)
  41 #ifdef VT100
  42                         lprcat(lgetl());        /* print out each line that
  43                                                  * we read in */
  44 #else   /* VT100 */
  45                 {
  46                         tmcapcnv(tmbuf, lgetl());
  47                         lprcat(tmbuf);
  48                 }               /* intercept \33's */
  49 #endif  /* VT100 */
  50                 if (j > 1) {
  51                         lprcat("    ---- Press ");
  52                         standout("return");
  53                         lprcat(" to exit, ");
  54                         standout("space");
  55                         lprcat(" for more help ---- ");
  56                         i = 0;
  57                         while ((i != ' ') && (i != '\n') && (i != '\33'))
  58                                 i = ttgetch();
  59                         if ((i == '\n') || (i == '\33')) {
  60                                 lrclose();
  61                                 setscroll();
  62                                 drawscreen();
  63                                 return;
  64                         }
  65                 }
  66         }
  67         lrclose();
  68         retcont();
  69         drawscreen();
  70 }
  71
  72 /*
  73  *      function to display the welcome message and background
  74  */
  75 void
  76 welcome()
  77 {
  78         int    i;
  79 #ifndef VT100
  80         char            tmbuf[128];     /* intermediate translation buffer
  81                                          * when not a VT100 */
  82 #endif  /* VT100 */
  83         if (openhelp() < 0)
  84                 return;         /* open the help file */
  85         clear();
  86         for (i = 0; i < 23; i++)
  87 #ifdef VT100
  88                 lprcat(lgetl());/* print out each line that we read in */
  89 #else   /* VT100 */
  90         {
  91                 tmcapcnv(tmbuf, lgetl());
  92                 lprcat(tmbuf);
  93         }                       /* intercept \33's */
  94 #endif  /* VT100 */
  95         lrclose();
  96         retcont();              /* press return to continue */
  97 }
  98
  99 /*
 100  *      function to say press return to continue and reset scroll when done
 101  */
 102 static void
 103 retcont()
 104 {
 105         cursor(1, 24);
 106         lprcat("Press ");
 107         standout("return");
 108         lprcat(" to continue: ");
 109         while (ttgetch() != '\n');
 110         setscroll();
 111 }
 112
 113 /*
 114  *      routine to open the help file and return the first character - '0'
 115  */
 116 static int
 117 openhelp(void)
 118 {
 119         if (lopen(helpfile) < 0) {
 120                 lprintf("Can't open help file \"%s\" ", helpfile);
 121                 lflush();
 122                 sleep(4);
 123                 drawscreen();
 124                 setscroll();
 125                 return (-1);
 126         }
 127         resetscroll();
 128         return (lgetc() - '0');
 129 }