282 lines
6.9 KiB
C
282 lines
6.9 KiB
C
/*-
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)termin.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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/* this takes characters from the keyboard, and produces 3270 keystroke
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codes
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "../general/general.h"
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#include "../ctlr/function.h"
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#include "../ctlr/externs.h"
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#include "../ctlr/declare.h"
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#include "../api/astosc.h"
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#include "state.h"
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#include "../general/globals.h"
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#define IsControl(c) (!isprint(c) || (isspace(c) && ((c) != ' ')))
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#define NextState(x) (x->next)
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/* XXX temporary - hard code in the state table */
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#define MATCH_ANY 0xff /* actually, match any character */
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static unsigned char
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ourBuffer[100], /* where we store stuff */
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*ourPHead = ourBuffer, /* first character in buffer */
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*ourPTail = ourBuffer, /* where next character goes */
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*TransPointer = 0; /* For transparent mode data */
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static int InControl;
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static int WaitingForSynch;
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static struct astosc
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*spacePTR = 0; /* Space is hard to enter */
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static state
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*headOfControl = 0; /* where we enter code state table */
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#define FullChar ((ourPTail+5) >= ourBuffer+sizeof ourBuffer)
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#define EmptyChar (ourPTail == ourPHead)
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/*
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* init_keyboard()
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*
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* Initialize the keyboard variables.
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*/
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void
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init_keyboard()
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{
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ourPHead = ourPTail = ourBuffer;
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InControl = 0;
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WaitingForSynch = 0;
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}
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/*
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* Initialize the keyboard mapping file.
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*/
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void
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InitMapping()
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{
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extern state *InitControl();
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register struct astosc *ptr;
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if (!headOfControl) {
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/* need to initialize */
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headOfControl = InitControl((char *)0, 0, ascii_to_index);
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if (!headOfControl) { /* should not occur */
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quit();
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}
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for (ptr = &astosc[0]; ptr <= &astosc[highestof(astosc)]; ptr++) {
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if (ptr->function == FCN_SPACE) {
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spacePTR = ptr;
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}
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}
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}
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}
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/* AddChar - put a function index in our buffer */
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static void
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AddChar(c)
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int c;
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{
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if (!FullChar) {
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*ourPTail++ = c;
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} else {
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RingBell("Typeahead buffer full");
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}
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}
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/* FlushChar - put everything where it belongs */
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static void
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FlushChar()
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{
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ourPTail = ourBuffer;
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ourPHead = ourBuffer;
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}
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/*ARGSUSED*/
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void
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TransInput(onoff, mode)
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int mode; /* Which KIND of transparent input */
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int onoff; /* Going in, or coming out */
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{
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if (onoff) {
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/* Flush pending input */
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FlushChar();
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TransPointer = ourBuffer;
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} else {
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}
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}
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int
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TerminalIn()
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{
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/* send data from us to next link in stream */
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int work = 0;
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register struct astosc *ptr;
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while (!EmptyChar) { /* send up the link */
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if (*ourPHead == ' ') {
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ptr = spacePTR;
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} else {
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ptr = &astosc[*ourPHead];
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}
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if (AcceptKeystroke(ptr->scancode, ptr->shiftstate) == 1) {
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ourPHead++;
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work = 1;
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} else {
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break;
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}
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}
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if (EmptyChar) {
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FlushChar();
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}
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/* return value answers question: "did we do anything useful?" */
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return work;
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}
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int
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DataFromTerminal(buffer, count)
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register char *buffer; /* the data read in */
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register int count; /* how many bytes in this buffer */
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{
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register state *regControlPointer;
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register char c;
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register int result;
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int origCount;
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extern int bellwinup;
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static state *controlPointer;
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if (TransPointer) {
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int i;
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if ((count+TransPointer) >= (ourBuffer+sizeof ourBuffer)) {
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i = ourBuffer+sizeof ourBuffer-TransPointer;
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} else {
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i = count;
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}
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while (i--) {
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c = (*buffer++)&0x7f;
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*TransPointer++ = c|0x80;
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if (c == '\r') {
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SendTransparent((char *)ourBuffer, TransPointer-ourBuffer);
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TransPointer = 0; /* Done */
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break;
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}
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}
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return count;
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}
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if (bellwinup) {
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void BellOff();
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BellOff();
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}
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origCount = count;
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while (count) {
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c = *buffer++&0x7f;
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count--;
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if (!InControl && !IsControl(c)) {
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AddChar(c); /* add ascii character */
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} else {
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if (!InControl) { /* first character of sequence */
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InControl = 1;
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controlPointer = headOfControl;
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}
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/* control pointer points to current position in state table */
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for (regControlPointer = controlPointer; ;
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regControlPointer = NextState(regControlPointer)) {
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if (!regControlPointer) { /* ran off end */
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RingBell("Invalid control sequence");
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regControlPointer = headOfControl;
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InControl = 0;
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count = 0; /* Flush current input */
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break;
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}
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if ((regControlPointer->match == c) /* hit this character */
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|| (regControlPointer->match == MATCH_ANY)) {
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result = regControlPointer->result;
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if (result == STATE_GOTO) {
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regControlPointer = regControlPointer->address;
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break; /* go to next character */
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}
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if (WaitingForSynch) {
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if (astosc[result].function == FCN_SYNCH) {
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WaitingForSynch = 0;
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} else {
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void RingBell();
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RingBell("Need to type synch character");
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}
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}
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else if (astosc[result].function == FCN_FLINP) {
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FlushChar(); /* Don't add FLINP */
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} else {
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if (astosc[result].function == FCN_MASTER_RESET) {
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FlushChar();
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}
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AddChar(result); /* add this code */
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}
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InControl = 0; /* out of control now */
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break;
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}
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}
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controlPointer = regControlPointer; /* save state */
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}
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}
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(void) TerminalIn(); /* try to send data */
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return(origCount-count);
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}
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