phantasia/io.c

   1 /*      $NetBSD: io.c,v 1.14 2009/08/31 08:27:16 dholland Exp $ */
   2
   3 /*
   4  * io.c - input/output routines for Phantasia
   5  */
   6
   7 #include <sys/cdefs.h>
   8
   9 #include <ctype.h>
  10 #include <math.h>
  11 #include <setjmp.h>
  12 #include <signal.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <unistd.h>
  16
  17 #include "macros.h"
  18 #include "phantdefs.h"
  19 #include "phantstruct.h"
  20 #include "phantglobs.h"
  21 //#include "pathnames.h"
  22
  23 #undef bool
  24 #include <curses.h>
  25
  26 static void catchalarm(int) __dead;
  27
  28 void
  29 getstring(char *cp, int mx)
  30 {
  31         char   *inptr;          /* pointer into string for next string */
  32         int     x, y;           /* original x, y coordinates on screen */
  33         int     ch;             /* input */
  34
  35         getyx(stdscr, y, x);    /* get coordinates on screen */
  36         inptr = cp;
  37         *inptr = '\0';          /* clear string to start */
  38         --mx;                   /* reserve room in string for nul terminator */
  39
  40         do
  41                 /* get characters and process */
  42         {
  43                 if (Echo)
  44                         mvaddstr(y, x, cp);     /* print string on screen */
  45                 clrtoeol();     /* clear any data after string */
  46                 refresh();      /* update screen */
  47
  48                 ch = getchar(); /* get character */
  49
  50                 switch (ch) {
  51                 case CH_ERASE:  /* back up one character */
  52                         if (inptr > cp)
  53                                 --inptr;
  54                         break;
  55
  56                 case CH_KILL:   /* back up to original location */
  57                         inptr = cp;
  58                         break;
  59
  60                 case CH_NEWLINE:        /* terminate string */
  61                         break;
  62
  63                 case CH_REDRAW:/* redraw screen */
  64                         clearok(stdscr, TRUE);
  65                         continue;
  66
  67                 default:        /* put data in string */
  68                         if (ch >= ' ' || Wizard)
  69                                 /* printing char; put in string */
  70                                 *inptr++ = ch;
  71                 }
  72
  73                 *inptr = '\0';  /* terminate string */
  74         }
  75         while (ch != CH_NEWLINE && inptr < cp + mx);
  76 }
  77
  78 void
  79 more(int where)
  80 {
  81         mvaddstr(where, 0, "-- more --");
  82         getanswer(" ", FALSE);
  83 }
  84
  85 double
  86 infloat(void)
  87 {
  88         double  result;         /* return value */
  89
  90         getstring(Databuf, SZ_DATABUF);
  91         if (sscanf(Databuf, "%lf", &result) < 1)
  92                 /* no valid number entered */
  93                 result = 0.0;
  94
  95         return (result);
  96 }
  97
  98 int
  99 inputoption(void)
 100 {
 101         ++Player.p_age;         /* increase age */
 102
 103         if (Player.p_ring.ring_type != R_SPOILED)
 104                 /* ring ok */
 105                 return (getanswer("T ", TRUE));
 106         else
 107                 /* bad ring */
 108         {
 109                 getanswer(" ", TRUE);
 110                 return ((int) ROLL(0.0, 5.0) + '0');
 111         }
 112 }
 113
 114 void
 115 interrupt(void)
 116 {
 117         char    line[81];       /* a place to store data already on screen */
 118         int     loop;           /* counter */
 119         int     x, y;           /* coordinates on screen */
 120         int     ch;             /* input */
 121         unsigned savealarm;     /* to save alarm value */
 122
 123 #ifdef SYS3
 124         signal(SIGINT, SIG_IGN);
 125 #endif
 126 #ifdef SYS5
 127         signal(SIGINT, SIG_IGN);
 128 #endif
 129
 130         savealarm = alarm(0);   /* turn off any alarms */
 131
 132         getyx(stdscr, y, x);    /* save cursor location */
 133
 134         for (loop = 0; loop < 80; ++loop) {     /* save line on screen */
 135                 move(4, loop);
 136                 line[loop] = inch();
 137         }
 138         line[80] = '\0';        /* nul terminate */
 139
 140         if (Player.p_status == S_INBATTLE || Player.p_status == S_MONSTER)
 141                 /* in midst of fighting */
 142         {
 143                 mvaddstr(4, 0, "Quitting now will automatically kill your character.  Still want to ? ");
 144                 ch = getanswer("NY", FALSE);
 145                 if (ch == 'Y')
 146                         death("Bailing out");
 147                 /* NOTREACHED */
 148         } else {
 149                 mvaddstr(4, 0, "Do you really want to quit ? ");
 150                 ch = getanswer("NY", FALSE);
 151                 if (ch == 'Y')
 152                         leavegame();
 153                 /* NOTREACHED */
 154         }
 155
 156         mvaddstr(4, 0, line);   /* restore data on screen */
 157         move(y, x);             /* restore cursor */
 158         refresh();
 159
 160 #ifdef SYS3
 161         signal(SIGINT, interrupt);
 162 #endif
 163 #ifdef SYS5
 164         signal(SIGINT, interrupt);
 165 #endif
 166
 167         alarm(savealarm);       /* restore alarm */
 168 }
 169
 170 int
 171 getanswer(const char *choices, phbool def)
 172 {
 173         int     ch;             /* input */
 174         volatile int    loop;   /* counter */
 175         volatile int    oldx, oldy;     /* original coordinates on screen */
 176
 177         getyx(stdscr, oldy, oldx);
 178         alarm(0);               /* make sure alarm is off */
 179
 180         for (loop = 3; loop; --loop)
 181                 /* try for 3 times */
 182         {
 183                 if (setjmp(Timeoenv) != 0)
 184                         /* timed out waiting for response */
 185                 {
 186                         if (def || loop <= 1)
 187                                 /* return default answer */
 188                                 break;
 189                         else
 190                                 /* prompt, and try again */
 191                                 goto YELL;
 192                 } else
 193                         /* wait for response */
 194                 {
 195                         clrtoeol();
 196                         refresh();
 197 #ifdef BSD41
 198                         sigset(SIGALRM, catchalarm);
 199 #else
 200                         signal(SIGALRM, catchalarm);
 201 #endif
 202                         /* set timeout */
 203                         if (Timeout)
 204                                 alarm(7);       /* short */
 205                         else
 206                                 alarm(600);     /* long */
 207
 208                         ch = getchar();
 209
 210                         alarm(0);       /* turn off timeout */
 211
 212                         if (ch < 0)
 213                                 /* caught some signal */
 214                         {
 215                                 ++loop;
 216                                 continue;
 217                         } else
 218                                 if (ch == CH_REDRAW)
 219                                         /* redraw screen */
 220                                 {
 221                                         clearok(stdscr, TRUE);  /* force clear screen */
 222                                         ++loop; /* don't count this input */
 223                                         continue;
 224                                 } else
 225                                         if (Echo) {
 226                                                 addch(ch);      /* echo character */
 227                                                 refresh();
 228                                         }
 229                         if (islower(ch))
 230                                 /* convert to upper case */
 231                                 ch = toupper(ch);
 232
 233                         if (def || strchr(choices, ch) != NULL)
 234                                 /* valid choice */
 235                                 return (ch);
 236                         else
 237                                 if (!def && loop > 1)
 238                                         /* bad choice; prompt, and try again */
 239                                 {
 240                         YELL:           mvprintw(oldy + 1, 0, "Please choose one of : [%s]\n", choices);
 241                                         move(oldy, oldx);
 242                                         clrtoeol();
 243                                         continue;
 244                                 } else
 245                                         /* return default answer */
 246                                         break;
 247                 }
 248         }
 249
 250         return (*choices);
 251 }
 252
 253 static void
 254 catchalarm(int dummy __unused)
 255 {
 256         longjmp(Timeoenv, 1);
 257 }