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deb-mbse/lib/rawio.c
2001-08-25 19:53:11 +00:00

262 lines
5.4 KiB
C

/*****************************************************************************
*
* File ..................: rawio.c
* Purpose ...............: Raw I/O routines.
* Last modification date : 07-Aug-2001
*
*****************************************************************************
* Copyright (C) 1997-2001
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************************/
#include "libs.h"
#include "structs.h"
#include "common.h"
int rawset = FALSE;
/*
* Sets raw mode and saves the terminal setup
*/
void Setraw()
{
int rc;
// if (ioctl(ttyfd, TCGETA, &tbuf) == -1) {
// perror("TCGETA Failed");
// exit(1); /* ERROR - could not set get tty ioctl */
// }
if ((rc = tcgetattr(ttyfd, &tbufs))) {
perror("");
printf("$tcgetattr(0, save) return %d\n", rc);
exit(1);
}
tbufsavs = tbufs;
tbufs.c_iflag &= ~(INLCR | ICRNL | ISTRIP | IXON ); /* IUCLC removed for FreeBSD */
/*
* Map CRNL modes strip control characters and flow control
*/
tbufs.c_oflag &= ~OPOST; /* Don't do ouput character translation */
tbufs.c_lflag &= ~(ICANON | ECHO); /* No canonical input and no echo */
tbufs.c_cc[VMIN] = 1; /* Receive 1 character at a time */
tbufs.c_cc[VTIME] = 0; /* No time limit per character */
if ((rc = tcsetattr(ttyfd, TCSADRAIN, &tbufs))) {
perror("");
printf("$tcsetattr(%d, TCSADRAIN, raw) return %d\n", ttyfd, rc);
exit(1);
}
// if (ioctl(ttyfd, TCSETAF, &tbuf) == -1) {
// perror("TCSETAF failed");
// exit(1); /* ERROR - could not set tty ioctl */
// }
rawset = TRUE;
}
/*
* Unsets raw mode and returns state of terminal
*/
void Unsetraw()
{
int rc;
/*
* Only unset the mode if it is set to raw mode
*/
if (rawset == TRUE) {
// if (ioctl(ttyfd, TCSETAF, &tbufsav) == -1) {
// perror("TCSETAF Normal Failed");
// exit(1); /* ERROR - could not save original tty ioctl */
// }
if ((rc = tcsetattr(ttyfd, TCSAFLUSH, &tbufsavs))) {
perror("");
printf("$tcsetattr(%d, TCSAFLUSH, save) return %d\n", ttyfd, rc);
exit(1);
}
}
rawset = FALSE;
}
/*
* This function is used to get a single character from a user ie for a
* menu option
*/
unsigned char Getone()
{
unsigned char c = 0;
if ((ttyfd = open ("/dev/tty", O_RDWR|O_NONBLOCK)) < 0) {
perror("open 8");
exit(1);
}
Setraw();
c = Readkey();
Unsetraw();
close(ttyfd);
return(c);
}
/*
* Read the (locked) speed from the tty
*/
int Speed(void)
{
// int mspeed;
// struct termio ttyhold;
speed_t mspeed;
// static int baud[16] = {0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400};
// ioctl(0, TCGETA, &ttyhold);
// mspeed = baud[ttyhold.c_cflag & 017];
// ioctl(0, TCSETAF, &ttyhold);
mspeed = cfgetospeed(&tbufs);
return(mspeed);
}
/*
* Wait for a character for a maximum of wtime * 10 mSec.
*/
int Waitchar(unsigned char *ch, int wtime)
{
int i, rc = -1;
for (i = 0; i < wtime; i++) {
rc = read(ttyfd, ch, 1);
if (rc == 1)
return rc;
usleep(10000);
}
return rc;
}
int Escapechar(unsigned char *ch)
{
int rc;
unsigned char c;
/*
* Escape character, if nothing follows within
* 50 mSec, the user really pressed <esc>.
*/
if ((rc = Waitchar(ch, 5)) == -1)
return rc;
if (*ch == '[') {
/*
* Start of CSI sequence. If nothing follows,
* return immediatly.
*/
if ((rc = Waitchar(ch, 5)) == -1)
return rc;
/*
* Test for the most important keys. Note
* that only the cursor movement keys are
* guaranteed to work with PC-clients.
*/
c = *ch;
if (c == 'A')
c = KEY_UP;
if (c == 'B')
c = KEY_DOWN;
if (c == 'C')
c = KEY_RIGHT;
if (c == 'D')
c = KEY_LEFT;
if ((c == '1') || (c == 'H') || (c == 0))
c = KEY_HOME;
if ((c == '4') || (c == 'K') || (c == 101) || (c == 144))
c = KEY_END;
if (c == '2')
c = KEY_INS;
if (c == '3')
c = KEY_DEL;
if (c == '5')
c = KEY_PGUP;
if (c == '6')
c = KEY_PGDN;
memcpy(ch, &c, sizeof(unsigned char));
return rc;
}
return -1;
}
/*
* This next function will detect the grey keys on the keyboard for
* VT100, VT220, Xterm, PC-ANSI, and Linux console. Works with
* several terminals on serial lines (tested 1200 bps).
* If for example cursur keys are detected, this function returns
* a translated value.
*/
unsigned char Readkey(void)
{
unsigned char ch = 0;
int rc = -1;
while (rc == -1) {
rc = Waitchar(&ch, 5);
/*
* If the character is not an Escape character,
* then this function is finished.
*/
if ((rc == 1) && (ch != KEY_ESCAPE))
return ch;
if ((rc == 1) && (ch == KEY_ESCAPE)) {
rc = Escapechar(&ch);
if (rc == 1)
return ch;
else
return KEY_ESCAPE;
}
}
return(ch);
}