NetBSD/usr.bin/tn3270/ascii/termin.c

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/* $NetBSD: termin.c,v 1.5 1998/11/06 20:05:12 christos Exp $ */
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/*-
* Copyright (c) 1988 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#include <sys/cdefs.h>
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#ifndef lint
#if 0
static char sccsid[] = "@(#)termin.c 4.2 (Berkeley) 4/26/91";
#else
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__RCSID("$NetBSD: termin.c,v 1.5 1998/11/06 20:05:12 christos Exp $");
#endif
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#endif /* not lint */
/* this takes characters from the keyboard, and produces 3270 keystroke
codes
*/
#include <stdio.h>
#include <ctype.h>
#include "../general/general.h"
#include "../ctlr/function.h"
#include "../ctlr/declare.h"
#include "../sys_curses/telextrn.h"
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#include "../api/astosc.h"
#include "state.h"
#include "externs.h"
#include "map3270.h"
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#include "../general/globals.h"
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#define IsControl(c) (!isprint((unsigned char)c) || (isspace((unsigned char)c) && ((c) != ' ')))
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#define NextState(x) (x->next)
/* XXX temporary - hard code in the state table */
#define MATCH_ANY 0xff /* actually, match any character */
static unsigned char
ourBuffer[100], /* where we store stuff */
*ourPHead = ourBuffer, /* first character in buffer */
*ourPTail = ourBuffer, /* where next character goes */
*TransPointer = 0; /* For transparent mode data */
static int InControl;
static int WaitingForSynch;
static struct astosc
*spacePTR = 0; /* Space is hard to enter */
static state
*headOfControl = 0; /* where we enter code state table */
#define FullChar ((ourPTail+5) >= ourBuffer+sizeof ourBuffer)
#define EmptyChar (ourPTail == ourPHead)
static void AddChar __P((int));
static void FlushChar __P((void));
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/*
* init_keyboard()
*
* Initialize the keyboard variables.
*/
void
init_keyboard()
{
ourPHead = ourPTail = ourBuffer;
InControl = 0;
WaitingForSynch = 0;
}
/*
* Initialize the keyboard mapping file.
*/
void
InitMapping()
{
struct astosc *ptr;
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if (!headOfControl) {
/* need to initialize */
headOfControl = InitControl((char *)0, 0, ascii_to_index);
if (!headOfControl) { /* should not occur */
quit(0, NULL);
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}
for (ptr = &astosc[0]; ptr <= &astosc[highestof(astosc)]; ptr++) {
if (ptr->function == FCN_SPACE) {
spacePTR = ptr;
}
}
}
}
/* AddChar - put a function index in our buffer */
static void
AddChar(c)
int c;
{
if (!FullChar) {
*ourPTail++ = c;
} else {
RingBell("Typeahead buffer full");
}
}
/* FlushChar - put everything where it belongs */
static void
FlushChar()
{
ourPTail = ourBuffer;
ourPHead = ourBuffer;
}
/*ARGSUSED*/
void
TransInput(onoff, mode)
int mode; /* Which KIND of transparent input */
int onoff; /* Going in, or coming out */
{
if (onoff) {
/* Flush pending input */
FlushChar();
TransPointer = ourBuffer;
} else {
}
}
int
TerminalIn()
{
/* send data from us to next link in stream */
int work = 0;
struct astosc *ptr;
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while (!EmptyChar) { /* send up the link */
if (*ourPHead == ' ') {
ptr = spacePTR;
} else {
ptr = &astosc[*ourPHead];
}
if (AcceptKeystroke(ptr->scancode, ptr->shiftstate) == 1) {
ourPHead++;
work = 1;
} else {
break;
}
}
if (EmptyChar) {
FlushChar();
}
/* return value answers question: "did we do anything useful?" */
return work;
}
int
DataFromTerminal(buffer, count)
char *buffer; /* the data read in */
int count; /* how many bytes in this buffer */
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{
state *regControlPointer;
char c;
int result;
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int origCount;
extern int bellwinup;
static state *controlPointer;
if (TransPointer) {
int i;
if ((count+TransPointer) >= (ourBuffer+sizeof ourBuffer)) {
i = ourBuffer+sizeof ourBuffer-TransPointer;
} else {
i = count;
}
while (i--) {
c = (*buffer++)&0x7f;
*TransPointer++ = c|0x80;
if (c == '\r') {
SendTransparent((char *)ourBuffer, TransPointer-ourBuffer);
TransPointer = 0; /* Done */
break;
}
}
return count;
}
if (bellwinup) {
BellOff();
}
origCount = count;
while (count) {
c = *buffer++&0x7f;
count--;
if (!InControl && !IsControl(c)) {
AddChar(c); /* add ascii character */
} else {
if (!InControl) { /* first character of sequence */
InControl = 1;
controlPointer = headOfControl;
}
/* control pointer points to current position in state table */
for (regControlPointer = controlPointer; ;
regControlPointer = NextState(regControlPointer)) {
if (!regControlPointer) { /* ran off end */
RingBell("Invalid control sequence");
regControlPointer = headOfControl;
InControl = 0;
count = 0; /* Flush current input */
break;
}
if ((regControlPointer->match == c) /* hit this character */
|| (regControlPointer->match == MATCH_ANY)) {
result = regControlPointer->result;
if (result == STATE_GOTO) {
regControlPointer = regControlPointer->address;
break; /* go to next character */
}
if (WaitingForSynch) {
if (astosc[result].function == FCN_SYNCH) {
WaitingForSynch = 0;
} else {
RingBell("Need to type synch character");
}
}
else if (astosc[result].function == FCN_FLINP) {
FlushChar(); /* Don't add FLINP */
} else {
if (astosc[result].function == FCN_MASTER_RESET) {
FlushChar();
}
AddChar(result); /* add this code */
}
InControl = 0; /* out of control now */
break;
}
}
controlPointer = regControlPointer; /* save state */
}
}
(void) TerminalIn(); /* try to send data */
return(origCount-count);
}