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Diffstat (limited to 'hack/hack.tty.c')
| -rw-r--r-- | hack/hack.tty.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/hack/hack.tty.c b/hack/hack.tty.c new file mode 100644 index 0000000..37f12bf --- /dev/null +++ b/hack/hack.tty.c @@ -0,0 +1,313 @@ +/*- + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)hack.tty.c 8.1 (Berkeley) 5/31/93 + * $FreeBSD: src/games/hack/hack.tty.c,v 1.6.2.1 2000/07/20 10:35:07 kris Exp $ + * $DragonFly: src/games/hack/hack.tty.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $ + */ + +/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ +/* hack.tty.c - version 1.0.3 */ +/* + * With thanks to the people who sent code for SYSV - hpscdi!jon, + * arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. + */ + +#include <termios.h> +#include "hack.h" + +/* + * Some systems may have getchar() return EOF for various reasons, and + * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs. + * FIXME: is this still valid nowadays? + */ +#define NR_OF_EOFS 20 + +static char erase_char, kill_char; +static boolean settty_needed = FALSE; +struct termios inittyb, curttyb; + +static void setctty(void); + +/* + * Get initial state of terminal, set ospeed (for termcap routines) + * and switch off tab expansion if necessary. + * Called by startup() in termcap.c and after returning from ! or ^Z + */ +void +gettty(void) +{ + if (tcgetattr(fileno(stdin), &inittyb) < 0) + perror("Hack (gettty)"); + curttyb = inittyb; + erase_char = inittyb.c_cc[VERASE]; + kill_char = inittyb.c_cc[VKILL]; + getioctls(); + + /* do not expand tabs - they might be needed inside a cm sequence */ + if (curttyb.c_oflag & OXTABS) { + curttyb.c_oflag &= ~OXTABS; + setctty(); + } + settty_needed = TRUE; +} + +/* reset terminal to original state */ +void +settty(const char *s) +{ + clear_screen(); + end_screen(); + if (s) + printf("%s", s); + fflush(stdout); + if (tcsetattr(fileno(stdin), TCSANOW, &inittyb) < 0) + perror("Hack (settty)"); + flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF; + flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON; + setioctls(); +} + +static void +setctty(void) +{ + if (tcsetattr(fileno(stdin), TCSANOW, &curttyb) < 0) + perror("Hack (setctty)"); +} + +void +setftty(void) +{ + u_long ef = 0; /* desired value of flags & ECHO */ + u_long cf = !(ICANON); /* desired value of flags & CBREAK */ + int change = 0; + + flags.cbreak = ON; + flags.echo = OFF; + /* Should use (ECHO|CRMOD) here instead of ECHO */ + if ((curttyb.c_lflag & ECHO) != ef) { + curttyb.c_lflag &= ~ECHO; + change++; + } + if ((curttyb.c_lflag & ICANON) != cf) { + curttyb.c_lflag &= ~ICANON; + curttyb.c_lflag |= cf; + /* be satisfied with one character; no timeout */ + curttyb.c_cc[VMIN] = 1; /* was VEOF */ + curttyb.c_cc[VTIME] = 0; /* was VEOL */ + change++; + } + if (change) + setctty(); + start_screen(); +} + +/* fatal error */ +/* VARARGS1 */ +void +error(const char *s, ...) +{ + va_list ap; + + if (settty_needed) + settty(NULL); + va_start(ap, s); + vprintf(s, ap); + va_end(ap); + putchar('\n'); + exit(1); +} + +/* + * Read a line closed with '\n' into the array char bufp[BUFSZ]. + * (The '\n' is not stored. The string is closed with a '\0'.) + * Reading can be interrupted by an escape ('\033') - now the + * resulting string is "\033". + */ +void +getlin(char *bufp) +{ + char *obufp = bufp; + int c; + + flags.toplin = 2; /* nonempty, no --More-- required */ + for (;;) { + fflush(stdout); + if ((c = getchar()) == EOF) { + *bufp = 0; + return; + } + if (c == '\033') { + *obufp = c; + obufp[1] = 0; + return; + } + if (c == erase_char || c == '\b') { + if (bufp != obufp) { + bufp--; + putstr("\b \b"); /* putsym converts \b */ + } else + bell(); + } else if (c == '\n') { + *bufp = 0; + return; + } else if (' ' <= c && c < '\177') { + /* + * avoid isprint() - some people don't have it ' ' is + * not always a printing char + */ + *bufp = c; + bufp[1] = 0; + putstr(bufp); + if (bufp - obufp < BUFSZ - 1 && bufp - obufp < COLNO) + bufp++; + } else if (c == kill_char || c == '\177') { /* Robert Viduya */ + /* this test last - @ might be the kill_char */ + while (bufp != obufp) { + bufp--; + putstr("\b \b"); + } + } else + bell(); + } +} + +void +getret(void) +{ + cgetret(""); +} + +void +cgetret(const char *s) +{ + putsym('\n'); + if (flags.standout) + standoutbeg(); + putstr("Hit "); + putstr(flags.cbreak ? "space" : "return"); + putstr(" to continue: "); + if (flags.standout) + standoutend(); + xwaitforspace(s); +} + +char morc; /* tell the outside world what char he used */ + +void +xwaitforspace(const char *s) /* chars allowed besides space or return */ +{ + int c; + + morc = 0; + while ((c = readchar()) != '\n') { + if (flags.cbreak) { + if (c == ' ') + break; + if (s && strchr(s, c)) { + morc = c; + break; + } + bell(); + } + } +} + +char * +parse(void) +{ + static char inputline[COLNO]; + int foo; + + flags.move = 1; + if (!Invisible) + curs_on_u(); + else + home(); + while ((foo = readchar()) >= '0' && foo <= '9') + multi = 10 * multi + foo - '0'; + if (multi) { + multi--; + save_cm = inputline; + } + inputline[0] = foo; + inputline[1] = 0; + if (foo == 'f' || foo == 'F') { + inputline[1] = getchar(); +#ifdef QUEST + if (inputline[1] == foo) + inputline[2] = getchar(); + else +#endif /* QUEST */ + inputline[2] = 0; + } + if (foo == 'm' || foo == 'M') { + inputline[1] = getchar(); + inputline[2] = 0; + } + clrlin(); + return (inputline); +} + +char +readchar(void) +{ + int sym; + + fflush(stdout); + if ((sym = getchar()) == EOF) +#ifdef NR_OF_EOFS + { /* + * Some SYSV systems seem to return EOFs for various reasons + * (?like when one hits break or for interrupted systemcalls?), + * and we must see several before we quit. + */ + int cnt = NR_OF_EOFS; + while (cnt--) { + clearerr(stdin); /* omit if clearerr is undefined */ + if ((sym = getchar()) != EOF) + goto noteof; + } + end_of_input(); +noteof:; + } +#else + end_of_input(); +#endif /* NR_OF_EOFS */ + if (flags.toplin == 1) + flags.toplin = 2; + return ((char)sym); +} + +void +end_of_input(void) +{ + settty("End of input?\n"); + clearlocks(); + exit(0); +} |