4.4BSD/usr/src/games/phantasia/io.c
/*
* io.c - input/output routines for Phantasia
*/
#include "include.h"
/************************************************************************
/
/ FUNCTION NAME: getstring()
/
/ FUNCTION: read a string from operator
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS:
/ char *cp - pointer to buffer area to fill
/ int mx - maximum number of characters to put in buffer
/
/ RETURN VALUE: none
/
/ MODULES CALLED: wmove(), _filbuf(), clearok(), waddstr(), wrefresh(),
/ wclrtoeol()
/
/ GLOBAL INPUTS: Echo, _iob[], Wizard, *stdscr
/
/ GLOBAL OUTPUTS: _iob[]
/
/ DESCRIPTION:
/ Read a string from the keyboard.
/ This routine is specially designed to:
/
/ - strip non-printing characters (unless Wizard)
/ - echo, if desired
/ - redraw the screen if CH_REDRAW is entered
/ - read in only 'mx - 1' characters or less characters
/ - nul-terminate string, and throw away newline
/
/ 'mx' is assumed to be at least 2.
/
/************************************************************************/
getstring(cp, mx)
register char *cp;
register int mx;
{
register char *inptr; /* pointer into string for next string */
int x, y; /* original x, y coordinates on screen */
int ch; /* input */
getyx(stdscr, y, x); /* get coordinates on screen */
inptr = cp;
*inptr = '\0'; /* clear string to start */
--mx; /* reserve room in string for nul terminator */
do
/* get characters and process */
{
if (Echo)
mvaddstr(y, x, cp); /* print string on screen */
clrtoeol(); /* clear any data after string */
refresh(); /* update screen */
ch = getchar(); /* get character */
switch (ch)
{
case CH_ERASE: /* back up one character */
if (inptr > cp)
--inptr;
break;
case CH_KILL: /* back up to original location */
inptr = cp;
break;
case CH_NEWLINE: /* terminate string */
break;
case CH_REDRAW: /* redraw screen */
clearok(stdscr, TRUE);
continue;
default: /* put data in string */
if (ch >= ' ' || Wizard)
/* printing char; put in string */
*inptr++ = ch;
}
*inptr = '\0'; /* terminate string */
}
while (ch != CH_NEWLINE && inptr < cp + mx);
}
/* */
/************************************************************************
/
/ FUNCTION NAME: more()
/
/ FUNCTION: pause and prompt player
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS:
/ int where - line on screen on which to pause
/
/ RETURN VALUE: none
/
/ MODULES CALLED: wmove(), waddstr(), getanswer()
/
/ GLOBAL INPUTS: *stdscr
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/ Print a message, and wait for a space character.
/
/************************************************************************/
more(where)
int where;
{
mvaddstr(where, 0, "-- more --");
getanswer(" ", FALSE);
}
/* */
/************************************************************************
/
/ FUNCTION NAME: infloat()
/
/ FUNCTION: input a floating point number from operator
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS: none
/
/ RETURN VALUE: floating point number from operator
/
/ MODULES CALLED: sscanf(), getstring()
/
/ GLOBAL INPUTS: Databuf[]
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/ Read a string from player, and scan for a floating point
/ number.
/ If no valid number is found, return 0.0.
/
/************************************************************************/
double
infloat()
{
double result; /* return value */
getstring(Databuf, SZ_DATABUF);
if (sscanf(Databuf, "%lf", &result) < 1)
/* no valid number entered */
result = 0.0;
return(result);
}
/* */
/************************************************************************
/
/ FUNCTION NAME: inputoption()
/
/ FUNCTION: input an option value from player
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS: none
/
/ RETURN VALUE: none
/
/ MODULES CALLED: floor(), drandom(), getanswer()
/
/ GLOBAL INPUTS: Player
/
/ GLOBAL OUTPUTS: Player
/
/ DESCRIPTION:
/ Age increases with every move.
/ Refresh screen, and get a single character option from player.
/ Return a random value if player's ring has gone bad.
/
/************************************************************************/
inputoption()
{
++Player.p_age; /* increase age */
if (Player.p_ring.ring_type != R_SPOILED)
/* ring ok */
return(getanswer("T ", TRUE));
else
/* bad ring */
{
getanswer(" ", TRUE);
return((int) ROLL(0.0, 5.0) + '0');
}
}
/* */
/************************************************************************
/
/ FUNCTION NAME: interrupt()
/
/ FUNCTION: handle interrupt from operator
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS: none
/
/ RETURN VALUE: none
/
/ MODULES CALLED: fork(), exit(), wait(), death(), alarm(), execl(), wmove(),
/ getgid(), signal(), getenv(), wclear(), setuid(), getuid(), setgid(),
/ crmode(), clearok(), waddstr(), cleanup(), wrefresh(), leavegame(),
/ getanswer()
/
/ GLOBAL INPUTS: Player, *stdscr
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/ Allow player to quit upon hitting the interrupt key.
/ If the player wants to quit while in battle, he/she automatically
/ dies.
/
/************************************************************************/
interrupt()
{
char line[81]; /* a place to store data already on screen */
register int loop; /* counter */
int x, y; /* coordinates on screen */
int ch; /* input */
unsigned savealarm; /* to save alarm value */
#ifdef SYS3
signal(SIGINT, SIG_IGN);
#endif
#ifdef SYS5
signal(SIGINT, SIG_IGN);
#endif
savealarm = alarm(0); /* turn off any alarms */
getyx(stdscr, y, x); /* save cursor location */
for (loop = 0; loop < 80; ++loop) /* save line on screen */
{
move(4, loop);
line[loop] = inch();
}
line[80] = '\0'; /* nul terminate */
if (Player.p_status == S_INBATTLE || Player.p_status == S_MONSTER)
/* in midst of fighting */
{
mvaddstr(4, 0, "Quitting now will automatically kill your character. Still want to ? ");
ch = getanswer("NY", FALSE);
if (ch == 'Y')
death("Bailing out");
/*NOTREACHED*/
}
else
{
mvaddstr(4, 0, "Do you really want to quit ? ");
ch = getanswer("NY", FALSE);
if (ch == 'Y')
leavegame();
/*NOTREACHED*/
}
mvaddstr(4, 0, line); /* restore data on screen */
move(y, x); /* restore cursor */
refresh();
#ifdef SYS3
signal(SIGINT, interrupt);
#endif
#ifdef SYS5
signal(SIGINT, interrupt);
#endif
alarm(savealarm); /* restore alarm */
}
/* */
/************************************************************************
/
/ FUNCTION NAME: getanswer()
/
/ FUNCTION: get an answer from operator
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS:
/ char *choices - string of (upper case) valid choices
/ bool def - set if default answer
/
/ RETURN VALUE: none
/
/ MODULES CALLED: alarm(), wmove(), waddch(), signal(), setjmp(), strchr(),
/ _filbuf(), clearok(), toupper(), wrefresh(), mvprintw(), wclrtoeol()
/
/ GLOBAL INPUTS: catchalarm(), Echo, _iob[], _ctype[], *stdscr, Timeout,
/ Timeoenv[]
/
/ GLOBAL OUTPUTS: _iob[]
/
/ DESCRIPTION:
/ Get a single character answer from operator.
/ Timeout waiting for response. If we timeout, or the
/ answer in not in the list of valid choices, print choices,
/ and wait again, otherwise return the first character in ths
/ list of choices.
/ Give up after 3 tries.
/
/************************************************************************/
getanswer(choices, def)
char *choices;
bool def;
{
int ch; /* input */
int loop; /* counter */
int oldx, oldy; /* original coordinates on screen */
getyx(stdscr, oldy, oldx);
alarm(0); /* make sure alarm is off */
for (loop = 3; loop; --loop)
/* try for 3 times */
{
if (setjmp(Timeoenv) != 0)
/* timed out waiting for response */
{
if (def || loop <= 1)
/* return default answer */
break;
else
/* prompt, and try again */
goto YELL;
}
else
/* wait for response */
{
clrtoeol();
refresh();
#ifdef BSD41
sigset(SIGALRM, catchalarm);
#else
signal(SIGALRM, catchalarm);
#endif
/* set timeout */
if (Timeout)
alarm(7); /* short */
else
alarm(600); /* long */
ch = getchar();
alarm(0); /* turn off timeout */
if (ch < 0)
/* caught some signal */
{
++loop;
continue;
}
else if (ch == CH_REDRAW)
/* redraw screen */
{
clearok(stdscr, TRUE); /* force clear screen */
++loop; /* don't count this input */
continue;
}
else if (Echo)
{
addch(ch); /* echo character */
refresh();
}
if (islower(ch))
/* convert to upper case */
ch = toupper(ch);
if (def || strchr(choices, ch) != NULL)
/* valid choice */
return(ch);
else if (!def && loop > 1)
/* bad choice; prompt, and try again */
{
YELL: mvprintw(oldy + 1, 0, "Please choose one of : [%s]\n", choices);
move(oldy, oldx);
clrtoeol();
continue;
}
else
/* return default answer */
break;
}
}
return(*choices);
}
/* */
/************************************************************************
/
/ FUNCTION NAME: catchalarm()
/
/ FUNCTION: catch timer when waiting for input
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS: none
/
/ RETURN VALUE: none
/
/ MODULES CALLED: longjmp()
/
/ GLOBAL INPUTS: Timeoenv[]
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/ Come here when the alarm expires while waiting for input.
/ Simply longjmp() into getanswer().
/
/************************************************************************/
void
catchalarm()
{
longjmp(Timeoenv, 1);
}