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- /*
- * machdep.c
- *
- * This source herein may be modified and/or distributed by anybody who
- * so desires, with the following restrictions:
- * 1.) No portion of this notice shall be removed.
- * 2.) Credit shall not be taken for the creation of this source.
- * 3.) This code is not to be traded, sold, or used for personal
- * gain or profit.
- *
- */
-
- /* Included in this file are all system dependent routines. Extensive use
- * of #ifdef's will be used to compile the appropriate code on each system:
- *
- * UNIX: all UNIX systems.
- * UNIX_BSD4_2: UNIX BSD 4.2 and later, UTEK, (4.1 BSD too?)
- * UNIX_SYSV: UNIX system V
- * UNIX_V7: UNIX version 7
- *
- * All UNIX code should be included between the single "#ifdef UNIX" at the
- * top of this file, and the "#endif UNIX" at the bottom.
- *
- * To change a routine to include a new UNIX system, simply #ifdef the
- * existing routine, as in the following example:
- *
- * To make a routine compatible with UNIX system V, change the first
- * function to the second:
- *
- * md_function()
- * {
- * code;
- * }
- *
- * md_function()
- * {
- * #ifdef UNIX_SYSV
- * sysVcode;
- * #else
- * code;
- * #endif /* UNIX_SYSV */
- * }
- *
- * Appropriate variations of this are of course acceptible.
- * The use of "#elseif" is discouraged because of non-portability.
- * If the correct #define doesn't exist, "UNIX_SYSV" in this case, make it up
- * and insert it in the list at the top of the file. Alter the CFLAGS
- * in you Makefile appropriately.
- *
- */
-
- #ifdef UNIX
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/file.h>
- #include <sys/stat.h>
-
- #ifdef UNIX_SYSV
- #include <time.h>
- #include <termio.h>
- #endif /* UNIX_SYSV */
- #ifdef UNIX_BSD4_2
- #include <sys/time.h>
- #include <sgtty.h>
- #endif /* UNIX_BSD4_2 */
-
- #include <signal.h>
- #include "rogue.h"
-
- /* md_slurp:
- *
- * This routine throws away all keyboard input that has not
- * yet been read. It is used to get rid of input that the user may have
- * typed-ahead.
- *
- * This function is not necessary, so it may be stubbed. The might cause
- * message-line output to flash by because the game has continued to read
- * input without waiting for the user to read the message. Not such a
- * big deal.
- */
-
- md_slurp()
- {
- long ln;
-
- #ifdef UNIX_BSD4_2
- ioctl(0, TIOCFLUSH, &ln);
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- ioctl(0, TCFLSH, &ln);
- #endif /* UNIX_SYSV */
-
- for (ln = stdin->_cnt; ln > 0; ln--) {
- (void) getchar();
- }
- }
-
- /* md_control_keyboard():
- *
- * This routine is much like md_cbreak_no_echo_nonl() below. It sets up the
- * keyboard for appropriate input. Specifically, it prevents the tty driver
- * from stealing characters. For example, ^Y is needed as a command
- * character, but the tty driver intercepts it for another purpose. Any
- * such behavior should be stopped. This routine could be avoided if
- * we used RAW mode instead of CBREAK. But RAW mode does not allow the
- * generation of keyboard signals, which the program uses.
- *
- * The parameter 'mode' when true, indicates that the keyboard should
- * be set up to play rogue. When false, it should be restored if
- * necessary.
- *
- * This routine is not strictly necessary and may be stubbed. This may
- * cause certain command characters to be unavailable.
- */
-
- md_control_keybord(mode)
- boolean mode;
- {
- static boolean called_before = 0;
- #ifdef UNIX_BSD4_2
- static struct ltchars ltc_orig;
- static struct tchars tc_orig;
- struct ltchars ltc_temp;
- struct tchars tc_temp;
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- static struct termio _oldtty;
- struct termio _tty;
- #endif /* UNIX_SYSV */
-
- if (!called_before) {
- called_before = 1;
- #ifdef UNIX_BSD4_2
- ioctl(0, TIOCGETC, &tc_orig);
- ioctl(0, TIOCGLTC, <c_orig);
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- ioctl(0, TCGETA, &_oldtty);
- #endif /* UNIX_SYSV */
- }
- #ifdef UNIX_BSD4_2
- ltc_temp = ltc_orig;
- tc_temp = tc_orig;
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- _tty = _oldtty;
- #endif /* UNIX_SYSV */
-
- if (!mode) {
- #ifdef UNIX_BSD4_2
- ltc_temp.t_suspc = ltc_temp.t_dsuspc = -1;
- ltc_temp.t_rprntc = ltc_temp.t_flushc = -1;
- ltc_temp.t_werasc = ltc_temp.t_lnextc = -1;
- tc_temp.t_startc = tc_temp.t_stopc = -1;
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- _tty.c_cc[VSWTCH] = CNSWTCH;
- #endif /* UNIX_SYSV */
- }
- #ifdef UNIX_BSD4_2
- ioctl(0, TIOCSETC, &tc_temp);
- ioctl(0, TIOCSLTC, <c_temp);
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- ioctl(0, TCSETA, &_tty);
- #endif /* UNIX_SYSV */
- }
-
- /* md_heed_signals():
- *
- * This routine tells the program to call particular routines when
- * certain interrupts/events occur:
- *
- * SIGINT: call onintr() to interrupt fight with monster or long rest.
- * SIGQUIT: call byebye() to check for game termination.
- * SIGHUP: call error_save() to save game when terminal hangs up.
- *
- * On VMS, SIGINT and SIGQUIT correspond to ^C and ^Y.
- *
- * This routine is not strictly necessary and can be stubbed. This will
- * mean that the game cannot be interrupted properly with keyboard
- * input, this is not usually critical.
- */
-
- md_heed_signals()
- {
- signal(SIGINT, onintr);
- signal(SIGQUIT, byebye);
- signal(SIGHUP, error_save);
- }
-
- /* md_ignore_signals():
- *
- * This routine tells the program to completely ignore the events mentioned
- * in md_heed_signals() above. The event handlers will later be turned on
- * by a future call to md_heed_signals(), so md_heed_signals() and
- * md_ignore_signals() need to work together.
- *
- * This function should be implemented or the user risks interrupting
- * critical sections of code, which could cause score file, or saved-game
- * file, corruption.
- */
-
- md_ignore_signals()
- {
- signal(SIGQUIT, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- signal(SIGHUP, SIG_IGN);
- }
-
- /* md_get_file_id():
- *
- * This function returns an integer that uniquely identifies the specified
- * file. It need not check for the file's existence. In UNIX, the inode
- * number is used.
- *
- * This function need not be implemented. To stub the routine, just make
- * it return 0. This will make the game less able to prevent users from
- * modifying saved-game files. This is probably no big deal.
- */
-
- int
- md_get_file_id(fname)
- char *fname;
- {
- struct stat sbuf;
-
- if (stat(fname, &sbuf)) {
- return(-1);
- }
- return((int) sbuf.st_ino);
- }
-
- /* md_link_count():
- *
- * This routine returns the number of hard links to the specified file.
- *
- * This function is not strictly necessary. On systems without hard links
- * this routine can be stubbed by just returning 1.
- */
-
- int
- md_link_count(fname)
- char *fname;
- {
- struct stat sbuf;
-
- stat(fname, &sbuf);
- return((int) sbuf.st_nlink);
- }
-
- /* md_gct(): (Get Current Time)
- *
- * This function returns the current year, month(1-12), day(1-31), hour(0-23),
- * minute(0-59), and second(0-59). This is used for identifying the time
- * at which a game is saved.
- *
- * This function is not strictly necessary. It can be stubbed by returing
- * zeros instead of the correct year, month, etc. If your operating
- * system doesn't provide all of the time units requested here, then you
- * can provide only those that it does, and return zeros for the others.
- * If you cannot provide good time values, then users may be able to copy
- * saved-game files and play them.
- */
-
- md_gct(rt_buf)
- struct rogue_time *rt_buf;
- {
- struct tm *t, *localtime();
- long seconds;
-
- time(&seconds);
- t = localtime(&seconds);
-
- rt_buf->year = t->tm_year;
- rt_buf->month = t->tm_mon + 1;
- rt_buf->day = t->tm_mday;
- rt_buf->hour = t->tm_hour;
- rt_buf->minute = t->tm_min;
- rt_buf->second = t->tm_sec;
- }
-
- /* md_gfmt: (Get File Modification Time)
- *
- * This routine returns a file's date of last modification in the same format
- * as md_gct() above.
- *
- * This function is not strictly necessary. It is used to see if saved-game
- * files have been modified since they were saved. If you have stubbed the
- * routine md_gct() above by returning constant values, then you may do
- * exactly the same here.
- * Or if md_gct() is implemented correctly, but your system does not provide
- * file modification dates, you may return some date far in the past so
- * that the program will never know that a saved-game file being modified.
- * You may also do this if you wish to be able to restore games from
- * saved-games that have been modified.
- */
-
- md_gfmt(fname, rt_buf)
- char *fname;
- struct rogue_time *rt_buf;
- {
- struct stat sbuf;
- long seconds;
- struct tm *t;
-
- stat(fname, &sbuf);
- seconds = (long) sbuf.st_mtime;
- t = localtime(&seconds);
-
- rt_buf->year = t->tm_year;
- rt_buf->month = t->tm_mon + 1;
- rt_buf->day = t->tm_mday;
- rt_buf->hour = t->tm_hour;
- rt_buf->minute = t->tm_min;
- rt_buf->second = t->tm_sec;
- }
-
- /* md_df: (Delete File)
- *
- * This function deletes the specified file, and returns true (1) if the
- * operation was successful. This is used to delete saved-game files
- * after restoring games from them.
- *
- * Again, this function is not strictly necessary, and can be stubbed
- * by simply returning 1. In this case, saved-game files will not be
- * deleted and can be replayed.
- */
-
- boolean
- md_df(fname)
- char *fname;
- {
- if (unlink(fname)) {
- return(0);
- }
- return(1);
- }
-
- /* md_gln: (Get login name)
- *
- * This routine returns the login name of the user. This string is
- * used mainly for identifying users in score files.
- *
- * A dummy string may be returned if you are unable to implement this
- * function, but then the score file would only have one name in it.
- */
-
- char *
- md_gln()
- {
- char *getlogin();
- char *t;
-
- t = getlogin();
- return(t);
- }
-
- /* md_sleep:
- *
- * This routine causes the game to pause for the specified number of
- * seconds.
- *
- * This routine is not necessary at all, and can be stubbed with no ill
- * effects.
- */
-
- md_sleep(nsecs)
- int nsecs;
- {
- (void) sleep(nsecs);
- }
-
- /* md_getenv()
- *
- * This routine gets certain values from the user's environment. These
- * values are strings, and each string is identified by a name. The names
- * of the values needed, and their use, is as follows:
- *
- * TERMCAP
- * The name of the users's termcap file, NOT the termcap entries
- * themselves. This is used ONLY if the program is compiled with
- * CURSES defined (-DCURSES). Even in this case, the program need
- * not find a string for TERMCAP. If it does not, it will use the
- * default termcap file as returned by md_gdtcf();
- * TERM
- * The name of the users's terminal. This is used ONLY if the program
- * is compiled with CURSES defined (-DCURSES). In this case, the string
- * value for TERM must be found, or the routines in curses.c cannot
- * function, and the program will quit.
- * ROGUEOPTS
- * A string containing the various game options. This need not be
- * defined.
- * HOME
- * The user's home directory. This is only used when the user specifies
- * '~' as the first character of a saved-game file. This string need
- * not be defined.
- *
- * If your system does not provide a means of searching for these values,
- * you will have to do it yourself. None of the values above really need
- * to be defined except TERM when the program is compiled with CURSES
- * defined. In this case, as a bare minimum, you can check the 'name'
- * parameter, and if it is "TERM" find the terminal name and return that,
- * else return zero. If the program is not compiled with CURSES, you can
- * get by with simply always returning zero. Returning zero indicates
- * that their is no defined value for the given string.
- */
-
- char *
- md_getenv(name)
- char *name;
- {
- char *value;
- char *getenv();
-
- value = getenv(name);
-
- return(value);
- }
-
- /* md_malloc()
- *
- * This routine allocates, and returns a pointer to, the specified number
- * of bytes. This routines absolutely MUST be implemented for your
- * particular system or the program will not run at all. Return zero
- * when no more memory can be allocated.
- */
-
- char *
- md_malloc(n)
- int n;
- {
- char *malloc();
- char *t;
-
- t = malloc(n);
- return(t);
- }
-
- /* md_gseed() (Get Seed)
- *
- * This function returns a seed for the random number generator (RNG). This
- * seed causes the RNG to begin generating numbers at some point in it's
- * sequence. Without a random seed, the RNG will generate the same set
- * of numbers, and every game will start out exactly the same way. A good
- * number to use is the process id, given by getpid() on most UNIX systems.
- *
- * You need to find some single random integer, such as:
- * process id.
- * current time (minutes + seconds) returned from md_gct(), if implemented.
- *
- * It will not help to return "get_rand()" or "rand()" or the return value of
- * any pseudo-RNG. If you don't have a random number, you can just return 1,
- * but this means your games will ALWAYS start the same way, and will play
- * exactly the same way given the same input.
- */
-
- md_gseed()
- {
- return(getpid());
- }
-
- /* md_exit():
- *
- * This function causes the program to discontinue execution and exit.
- * This function must be implemented or the program will continue to
- * hang when it should quit.
- */
-
- md_exit(status)
- int status;
- {
- exit(status);
- }
-
- /* If you have a viable curses/termlib library, then use it and don't bother
- * implementing the routines below. And don't compile with -DCURSES.
- */
-
- #ifdef CURSES
-
- /* md_cbreak_no_echo_nonl:
- *
- * This routine sets up some terminal characteristics. The tty-driver
- * must be told to:
- * 1.) Not echo input.
- * 2.) Transmit input characters immediately upon typing. (cbreak mode)
- * 3.) Move the cursor down one line, without changing column, and
- * without generating a carriage-return, when it
- * sees a line-feed. This is only necessary if line-feed is ever
- * used in the termcap 'do' (cursor down) entry, in which case,
- * your system should must have a way of accomplishing this.
- *
- * When the parameter 'on' is true, the terminal is set up as specified
- * above. When this parameter is false, the terminal is restored to the
- * original state.
- *
- * Raw mode should not to be used. Keyboard signals/events/interrupts should
- * be sent, although they are not strictly necessary. See notes in
- * md_heed_signals().
- *
- * This function must be implemented for rogue to run properly if the
- * program is compiled with CURSES defined to use the enclosed curses
- * emulation package. If you are not using this, then this routine is
- * totally unnecessary.
- *
- * Notice that information is saved between calls. This is used to
- * restore the terminal to an initial saved state.
- *
- */
-
- md_cbreak_no_echo_nonl(on)
- boolean on;
- {
- #ifdef UNIX_BSD4_2
- static struct sgttyb tty_buf;
- static int tsave_flags;
-
- if (on) {
- ioctl(0, TIOCGETP, &tty_buf);
- tsave_flags = tty_buf.sg_flags;
- tty_buf.sg_flags |= CBREAK;
- tty_buf.sg_flags &= ~(ECHO | CRMOD); /* CRMOD: see note 3 above */
- ioctl(0, TIOCSETP, &tty_buf);
- } else {
- tty_buf.sg_flags = tsave_flags;
- ioctl(0, TIOCSETP, &tty_buf);
- }
- #endif /* UNIX_BSD4_2 */
- #ifdef UNIX_SYSV
- struct termio tty_buf;
- static struct termio tty_save;
-
- if (on) {
- ioctl(0, TCGETA, &tty_buf);
- tty_save = tty_buf;
- tty_buf.c_lflag &= ~(ICANON | ECHO);
- tty_buf.c_oflag &= ~ONLCR;
- tty_buf.c_cc[4] = 1; /* MIN */
- tty_buf.c_cc[5] = 2; /* TIME */
- ioctl(0, TCSETAF, &tty_buf);
- } else {
- ioctl(0, TCSETAF, &tty_save);
- }
- #endif /* UNIX_SYSV */
- }
-
- /* md_gdtcf(): (Get Default Termcap File)
- *
- * This function is called ONLY when the program is compiled with CURSES
- * defined. If you use your system's curses/termlib library, this function
- * won't be called. On most UNIX systems, "/etc/termcap" suffices.
- *
- * If their is no such termcap file, then return 0, but in that case, you
- * must have a TERMCAP file returned from md_getenv("TERMCAP"). The latter
- * will override the value returned from md_gdtcf(). If the program is
- * compiled with CURSES defined, and md_gdtcf() returns 0, and
- * md_getenv("TERMCAP") returns 0, the program will have no terminal
- * capability information and will quit.
- */
-
- char *
- md_gdtcf()
- {
- return("/etc/termcap");
- }
-
- /* md_tstp():
- *
- * This function puts the game to sleep and returns to the shell. This
- * only applies to UNIX 4.2 and 4.3. For other systems, the routine should
- * be provided as a do-nothing routine. md_tstp() will only be referenced
- * in the code when compiled with CURSES defined.
- *
- */
-
- md_tstp()
- {
- #ifdef UNIX_BSD4_2
- kill(0, SIGTSTP);
- #endif /* UNIX_BSD4_2 */
- }
-
- #endif /* CURSES */
-
- #endif /* UNIX */
-