games/hack/hack.tty.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)hack.tty.c       8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/hack/hack.tty.c,v 1.6.2.1 2000/07/20 10:35:07 kris Exp $
  35  * $DragonFly: src/games/hack/hack.tty.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $
  36  */
  37
  38 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
  39 /* hack.tty.c - version 1.0.3 */
  40 /* With thanks to the people who sent code for SYSV - hpscdi!jon,
  41    arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
  42
  43 #include        "hack.h"
  44
  45 /*
  46  * The distinctions here are not BSD - rest but rather USG - rest, as
  47  * BSD still has the old sgttyb structure, but SYSV has termio. Thus:
  48  */
  49 #ifdef BSD
  50 #define V7
  51 #else
  52 #define USG
  53 #endif /* BSD */
  54
  55 /*
  56  * Some systems may have getchar() return EOF for various reasons, and
  57  * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
  58  */
  59 #ifndef BSD
  60 #define NR_OF_EOFS      20
  61 #endif /* BSD */
  62
  63
  64 #ifdef USG
  65
  66 #include        <termio.h>
  67 #define termstruct      termio
  68 #define kill_sym        c_cc[VKILL]
  69 #define erase_sym       c_cc[VERASE]
  70 #define EXTABS          TAB3
  71 #define tabflgs         c_oflag
  72 #define echoflgs        c_lflag
  73 #define cbrkflgs        c_lflag
  74 #define CBRKMASK        ICANON
  75 #define CBRKON          ! /* reverse condition */
  76 #define OSPEED(x)       ((x).c_cflag & CBAUD)
  77 #define GTTY(x)         (ioctl(0, TCGETA, x))
  78 #define STTY(x)         (ioctl(0, TCSETA, x))   /* TCSETAF? TCSETAW? */
  79
  80 #else   /* V7 */
  81
  82 #include        <sgtty.h>
  83 #define termstruct      sgttyb
  84 #define kill_sym        sg_kill
  85 #define erase_sym       sg_erase
  86 #define EXTABS          XTABS
  87 #define tabflgs         sg_flags
  88 #define echoflgs        sg_flags
  89 #define cbrkflgs        sg_flags
  90 #define CBRKMASK        CBREAK
  91 #define CBRKON          /* empty */
  92 #define OSPEED(x)       (x).sg_ospeed
  93 #define GTTY(x)         (ioctl(0, TIOCGETP, x))
  94 #define STTY(x)         (ioctl(0, TIOCSETP, x))
  95
  96 #endif /* USG */
  97
  98 static char erase_char, kill_char;
  99 static boolean settty_needed = FALSE;
 100 struct termstruct inittyb, curttyb;
 101
 102 static void     setctty(void);
 103
 104 /*
 105  * Get initial state of terminal, set ospeed (for termcap routines)
 106  * and switch off tab expansion if necessary.
 107  * Called by startup() in termcap.c and after returning from ! or ^Z
 108  */
 109 void
 110 gettty(void)
 111 {
 112         if(GTTY(&inittyb) < 0)
 113                 perror("Hack (gettty)");
 114         curttyb = inittyb;
 115         erase_char = inittyb.erase_sym;
 116         kill_char = inittyb.kill_sym;
 117         getioctls();
 118
 119         /* do not expand tabs - they might be needed inside a cm sequence */
 120         if(curttyb.tabflgs & EXTABS) {
 121                 curttyb.tabflgs &= ~EXTABS;
 122                 setctty();
 123         }
 124         settty_needed = TRUE;
 125 }
 126
 127 /* reset terminal to original state */
 128 void
 129 settty(const char *s)
 130 {
 131         clear_screen();
 132         end_screen();
 133         if(s) printf("%s", s);
 134         fflush(stdout);
 135         if(STTY(&inittyb) < 0)
 136                 perror("Hack (settty)");
 137         flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
 138         flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
 139         setioctls();
 140 }
 141
 142 static void
 143 setctty(void)
 144 {
 145         if(STTY(&curttyb) < 0)
 146                 perror("Hack (setctty)");
 147 }
 148
 149 void
 150 setftty(void)
 151 {
 152 int ef = 0;                     /* desired value of flags & ECHO */
 153 int cf = CBRKON(CBRKMASK);      /* desired value of flags & CBREAK */
 154 int change = 0;
 155         flags.cbreak = ON;
 156         flags.echo = OFF;
 157         /* Should use (ECHO|CRMOD) here instead of ECHO */
 158         if((curttyb.echoflgs & ECHO) != ef){
 159                 curttyb.echoflgs &= ~ECHO;
 160                 change++;
 161         }
 162         if((curttyb.cbrkflgs & CBRKMASK) != cf){
 163                 curttyb.cbrkflgs &= ~CBRKMASK;
 164                 curttyb.cbrkflgs |= cf;
 165 #ifdef USG
 166                 /* be satisfied with one character; no timeout */
 167                 curttyb.c_cc[VMIN] = 1;         /* was VEOF */
 168                 curttyb.c_cc[VTIME] = 0;        /* was VEOL */
 169 #endif /* USG */
 170                 change++;
 171         }
 172         if(change){
 173                 setctty();
 174         }
 175         start_screen();
 176 }
 177
 178
 179 /* fatal error */
 180 /*VARARGS1*/
 181 void
 182 error(const char *s, ...)
 183 {
 184         va_list ap;
 185         if(settty_needed)
 186                 settty((char *) 0);
 187         va_start(ap, s);
 188         vprintf(s, ap);
 189         va_end(ap);
 190         putchar('\n');
 191         exit(1);
 192 }
 193
 194 /*
 195  * Read a line closed with '\n' into the array char bufp[BUFSZ].
 196  * (The '\n' is not stored. The string is closed with a '\0'.)
 197  * Reading can be interrupted by an escape ('\033') - now the
 198  * resulting string is "\033".
 199  */
 200 void
 201 getlin(char *bufp)
 202 {
 203         char *obufp = bufp;
 204         int c;
 205
 206         flags.toplin = 2;               /* nonempty, no --More-- required */
 207         for(;;) {
 208                 fflush(stdout);
 209                 if((c = getchar()) == EOF) {
 210                         *bufp = 0;
 211                         return;
 212                 }
 213                 if(c == '\033') {
 214                         *obufp = c;
 215                         obufp[1] = 0;
 216                         return;
 217                 }
 218                 if(c == erase_char || c == '\b') {
 219                         if(bufp != obufp) {
 220                                 bufp--;
 221                                 putstr("\b \b"); /* putsym converts \b */
 222                         } else  bell();
 223                 } else if(c == '\n') {
 224                         *bufp = 0;
 225                         return;
 226                 } else if(' ' <= c && c < '\177') {
 227                                 /* avoid isprint() - some people don't have it
 228                                    ' ' is not always a printing char */
 229                         *bufp = c;
 230                         bufp[1] = 0;
 231                         putstr(bufp);
 232                         if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
 233                                 bufp++;
 234                 } else if(c == kill_char || c == '\177') { /* Robert Viduya */
 235                                 /* this test last - @ might be the kill_char */
 236                         while(bufp != obufp) {
 237                                 bufp--;
 238                                 putstr("\b \b");
 239                         }
 240                 } else
 241                         bell();
 242         }
 243 }
 244
 245 void
 246 getret(void)
 247 {
 248         cgetret("");
 249 }
 250
 251 void
 252 cgetret(const char *s)
 253 {
 254         putsym('\n');
 255         if(flags.standout)
 256                 standoutbeg();
 257         putstr("Hit ");
 258         putstr(flags.cbreak ? "space" : "return");
 259         putstr(" to continue: ");
 260         if(flags.standout)
 261                 standoutend();
 262         xwaitforspace(s);
 263 }
 264
 265 char morc;      /* tell the outside world what char he used */
 266
 267 void
 268 xwaitforspace(const char *s)    /* chars allowed besides space or return */
 269 {
 270 int c;
 271
 272         morc = 0;
 273
 274         while((c = readchar()) != '\n') {
 275             if(flags.cbreak) {
 276                 if(c == ' ') break;
 277                 if(s && index(s,c)) {
 278                         morc = c;
 279                         break;
 280                 }
 281                 bell();
 282             }
 283         }
 284 }
 285
 286 char *
 287 parse(void)
 288 {
 289         static char inputline[COLNO];
 290         int foo;
 291
 292         flags.move = 1;
 293         if(!Invisible) curs_on_u(); else home();
 294         while((foo = readchar()) >= '0' && foo <= '9')
 295                 multi = 10*multi+foo-'0';
 296         if(multi) {
 297                 multi--;
 298                 save_cm = inputline;
 299         }
 300         inputline[0] = foo;
 301         inputline[1] = 0;
 302         if(foo == 'f' || foo == 'F'){
 303                 inputline[1] = getchar();
 304 #ifdef QUEST
 305                 if(inputline[1] == foo) inputline[2] = getchar(); else
 306 #endif /* QUEST */
 307                 inputline[2] = 0;
 308         }
 309         if(foo == 'm' || foo == 'M'){
 310                 inputline[1] = getchar();
 311                 inputline[2] = 0;
 312         }
 313         clrlin();
 314         return(inputline);
 315 }
 316
 317 char
 318 readchar(void)
 319 {
 320         int sym;
 321
 322         fflush(stdout);
 323         if((sym = getchar()) == EOF)
 324 #ifdef NR_OF_EOFS
 325         { /*
 326            * Some SYSV systems seem to return EOFs for various reasons
 327            * (?like when one hits break or for interrupted systemcalls?),
 328            * and we must see several before we quit.
 329            */
 330                 int cnt = NR_OF_EOFS;
 331                 while (cnt--) {
 332                     clearerr(stdin);    /* omit if clearerr is undefined */
 333                     if((sym = getchar()) != EOF) goto noteof;
 334                 }
 335                 end_of_input();
 336              noteof:    ;
 337         }
 338 #else
 339                 end_of_input();
 340 #endif /* NR_OF_EOFS */
 341         if(flags.toplin == 1)
 342                 flags.toplin = 2;
 343         return((char) sym);
 344 }
 345
 346 void
 347 end_of_input(void)
 348 {
 349         settty("End of input?\n");
 350         clearlocks();
 351         exit(0);
 352 }