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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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)inbound.c 4.3 (Berkeley) 4/26/91";
- #endif /* not lint */
-
- #include <stdio.h>
-
- #include "../general/general.h"
- #include "function.h"
- #include "hostctlr.h"
- #include "oia.h"
- #include "scrnctlr.h"
- #include "screen.h"
- #include "options.h"
- #include "../api/dctype.h"
- #include "../api/ebc_disp.h"
-
- #include "../general/globals.h"
- #include "externs.h"
- #include "declare.h"
-
- #define EmptyChar() (ourPTail == ourPHead)
- #define FullChar() (ourPHead == ourBuffer+sizeof ourBuffer)
-
-
- /*
- * We define something to allow us to to IsProtected() quickly
- * on unformatted screens (with the current algorithm for fields,
- * unprotected takes exponential time...).
- *
- * The idea is to call SetXIsProtected() BEFORE the
- * loop, then use XIsProtected().
- */
-
- #define SetXIsProtected() (XWasSF = 1)
- #define XIsProtected(p) (IsStartField(p)? \
- XWasSF = 1 : \
- (XWasSF? \
- (XWasSF = 0, XProtected = IsProtected(p)) : \
- XProtected))
-
- static char ourBuffer[400];
-
- static char *ourPHead = ourBuffer,
- *ourPTail = ourBuffer;
-
- static int HadAid; /* Had an AID haven't sent */
-
- static int InsertMode; /* is the terminal in insert mode? */
-
- static unsigned int
- rememberedshiftstate; /* Shift (alt) state of terminal */
-
- # define HITNUM(s) ((((s)&(SHIFT_CAPS|SHIFT_UPSHIFT))? 1:0) \
- + ((((s)&SHIFT_ALT)? 1:0)<<1))
-
- static int XWasSF, XProtected; /* For optimizations */
- #if !defined(PURE3274)
- extern int TransparentClock, OutputClock;
- #endif /* !defined(PURE3274) */
-
- #include "kbd.out" /* Get keyboard mapping function */
-
- /* the following are global variables */
-
- extern int UnLocked; /* keyboard is UnLocked? */
-
-
- /*
- * init_inbound :
- *
- * Reset variables to initial state.
- */
-
- void
- init_inbound()
- {
- ourPHead = ourPTail = ourBuffer;
- HadAid = 0;
- rememberedshiftstate = 0;
- InsertMode = 0;
- }
-
-
- /* Tab() - sets cursor to the start of the next unprotected field */
- static void
- Tab()
- {
- register int i, j;
-
- i = CursorAddress;
- j = WhereAttrByte(CursorAddress);
- do {
- if (IsStartField(i) && IsUnProtected(ScreenInc(i))) {
- break;
- }
- i = FieldInc(i);
- } while (i != j);
- if (IsStartField(i) && IsUnProtected(ScreenInc(i))) {
- CursorAddress = ScreenInc(i);
- } else {
- CursorAddress = SetBufferAddress(0,0);
- }
- }
-
-
- /* BackTab() - sets cursor to the start of the most recent field */
-
- static void
- BackTab()
- {
- register int i;
-
- i = ScreenDec(CursorAddress);
- for (;;) {
- if (IsStartField(ScreenDec(i)) && IsUnProtected(i)) {
- CursorAddress = i;
- break;
- }
- if (i == CursorAddress) {
- CursorAddress = SetBufferAddress(0,0);
- break;
- }
- i = ScreenDec(i);
- }
- }
-
- /*
- * ModifyMdt() - Turn a modified data tag bit on or off (watch
- * out for unformatted screens).
- */
-
- ModifyMdt(x,on)
- int x;
- int on;
- {
- int i = x;
-
- if (IsStartField(i)) { /* If we are at a start field position... */
- if (on) {
- ModifyHost(i, |= ATTR_MDT); /* Turn it on */
- } else {
- ModifyHost(i, &= ~ATTR_MDT); /* Turn it off */
- }
- } else {
- i = WhereAttrByte(i); /* Find beginning of field */
- if (IsStartField(i)) { /* Is there one? */
- if (on) {
- ModifyHost(i, |= ATTR_MDT); /* Turn it on */
- } else {
- ModifyHost(i, &= ~ATTR_MDT); /* Turn it off */
- }
- } /* else, don't modify - this is an unformatted screen */
- }
- }
-
-
- /* EraseEndOfField - erase all characters to the end of a field */
-
- static void
- EraseEndOfField()
- {
- register int i;
-
- if (IsProtected(CursorAddress)) {
- RingBell("Protected Field");
- } else {
- TurnOnMdt(CursorAddress);
- if (FormattedScreen()) {
- i = CursorAddress;
- do {
- AddHost(i, 0);
- i = ScreenInc(i);
- } while ((i != CursorAddress) && !IsStartField(i));
- } else { /* Screen is Unformatted */
- i = CursorAddress;
- do {
- AddHost(i, 0);
- i = ScreenInc(i);
- } while (i != HighestScreen());
- }
- }
- }
-
- /* Delete() - deletes a character from the screen
- *
- * What we want to do is delete the section
- * [where, from-1] from the screen,
- * filling in with what comes at from.
- *
- * The deleting continues to the end of the field (or
- * until the cursor wraps).
- *
- * From can be a start of a field. We
- * check for that. However, there can't be any
- * fields that start between where and from.
- * We don't check for that.
- *
- * Also, we assume that the protection status of
- * everything has been checked by the caller.
- *
- */
-
- static void
- Delete(where, from)
- register int where, /* Where to start deleting from */
- from; /* Where to pull back from */
- {
- register int i;
-
- TurnOnMdt(where); /* Only do this once in this field */
- i = where;
- do {
- if (IsStartField(from)) {
- AddHost(i, 0); /* Stick the edge at the start field */
- } else {
- AddHost(i, (char)GetHost(from));
- from = ScreenInc(from); /* Move the edge */
- }
- i = ScreenInc(i);
- } while ((!IsStartField(i)) && (i != where));
- }
-
- static void
- ColBak()
- {
- register int i;
-
- i = ScreenLineOffset(CursorAddress);
- for (i = i-1; i >= 0; i--) {
- if (OptColTabs[i]) {
- break;
- }
- }
- if (i < 0) {
- i = 0;
- }
- CursorAddress = SetBufferAddress(ScreenLine(CursorAddress), i);
- }
-
- static void
- ColTab()
- {
- register int i;
-
- i = ScreenLineOffset(CursorAddress);
- for (i = i+1; i < NumberColumns; i++) {
- if (OptColTabs[i]) {
- break;
- }
- }
- if (i >= NumberColumns) {
- i = NumberColumns-1;
- }
- CursorAddress = SetBufferAddress(ScreenLine(CursorAddress), i);
- }
-
- static void
- Home()
- {
- register int i;
- register int j;
-
- i = SetBufferAddress(OptHome, 0);
- j = WhereLowByte(i);
- /*
- * If the initial value of i points to the field attribute of
- * an unprotected field, we need to return the address of the
- * first data byte in the field (assuming there are any!).
- */
- if (IsStartField(i) && IsUnProtected(j)) {
- CursorAddress = j;
- return;
- }
- do {
- if (IsUnProtected(i)) {
- CursorAddress = i;
- return;
- }
- /* the following could be a problem if we got here with an
- * unformatted screen. However, this is "impossible", since
- * with an unformatted screen, the IsUnProtected(i) above
- * should be true.
- */
- i = ScreenInc(FieldInc(i));
- } while (i != j);
- CursorAddress = LowestScreen();
- }
-
- static
- LastOfField(i)
- register int i; /* position to start from */
- {
- register int j;
- register int k;
-
- k = j = i;
- SetXIsProtected();
- while (XIsProtected(i) || Disspace(GetHost(i))) {
- i = ScreenInc(i);
- if (i == j) {
- break;
- }
- }
- /* We are now IN a word IN an unprotected field (or wrapped) */
- while (!XIsProtected(i)) {
- if (!Disspace(GetHost(i))) {
- k = i;
- }
- i = ScreenInc(i);
- if (i == j) {
- break;
- }
- }
- return(k);
- }
-
-
- static void
- FlushChar()
- {
- ourPTail = ourPHead = ourBuffer;
- }
-
-
- /*
- * Add one EBCDIC (NOT display code) character to the buffer.
- */
-
- static void
- AddChar(character)
- char character;
- {
- if (FullChar()) {
- ourPTail += DataToNetwork(ourPTail, ourPHead-ourPTail, 0);
- if (EmptyChar()) {
- FlushChar();
- } else {
- char buffer[100];
-
- sprintf(buffer, "File %s, line %d: No room in network buffer!\n",
- __FILE__, __LINE__);
- ExitString(buffer, 1);
- /*NOTREACHED*/
- }
- }
- *ourPHead++ = character;
- }
-
-
- static void
- SendUnformatted()
- {
- register int i, j;
- register int Nulls;
- register int c;
-
- /* look for start of field */
- Nulls = 0;
- i = j = LowestScreen();
- do {
- c = GetHost(i);
- if (c == 0) {
- Nulls++;
- } else {
- while (Nulls) {
- Nulls--;
- AddChar(EBCDIC_BLANK); /* put in blanks */
- }
- AddChar((char)disp_ebc[c]);
- }
- i = ScreenInc(i);
- } while (i != j);
- }
-
- static
- SendField(i, cmd)
- register int i; /* where we saw MDT bit */
- int cmd; /* The command code (type of read) */
- {
- register int j;
- register int k;
- register int Nulls;
- register int c;
-
- /* look for start of field */
- i = j = WhereLowByte(i);
-
- /* On a test_request_read, don't send sba and address */
- if ((AidByte != AID_TREQ)
- || (cmd == CMD_SNA_READ_MODIFIED_ALL)) {
- AddChar(ORDER_SBA); /* set start field */
- AddChar(BufferTo3270_0(j)); /* set address of this field */
- AddChar(BufferTo3270_1(j));
- }
- /*
- * Only on read_modified_all do we return the contents
- * of the field when the attention was caused by a
- * selector pen.
- */
- if ((AidByte != AID_SELPEN)
- || (cmd == CMD_SNA_READ_MODIFIED_ALL)) {
- if (!IsStartField(j)) {
- Nulls = 0;
- k = ScreenInc(WhereHighByte(j));
- do {
- c = GetHost(j);
- if (c == 0) {
- Nulls++;
- } else {
- while (Nulls) {
- Nulls--;
- AddChar(EBCDIC_BLANK); /* put in blanks */
- }
- AddChar((char)disp_ebc[c]);
- }
- j = ScreenInc(j);
- } while ((j != k) && (j != i));
- }
- } else {
- j = FieldInc(j);
- }
- return(j);
- }
-
- /* Various types of reads... */
- void
- DoReadModified(cmd)
- int cmd; /* The command sent */
- {
- register int i, j;
-
- if (AidByte) {
- if (AidByte != AID_TREQ) {
- AddChar(AidByte);
- } else {
- /* Test Request Read header */
- AddChar(EBCDIC_SOH);
- AddChar(EBCDIC_PERCENT);
- AddChar(EBCDIC_SLASH);
- AddChar(EBCDIC_STX);
- }
- } else {
- AddChar(AID_NONE);
- }
- if (((AidByte != AID_PA1) && (AidByte != AID_PA2)
- && (AidByte != AID_PA3) && (AidByte != AID_CLEAR))
- || (cmd == CMD_SNA_READ_MODIFIED_ALL)) {
- if ((AidByte != AID_TREQ)
- || (cmd == CMD_SNA_READ_MODIFIED_ALL)) {
- /* Test request read_modified doesn't give cursor address */
- AddChar(BufferTo3270_0(CursorAddress));
- AddChar(BufferTo3270_1(CursorAddress));
- }
- i = j = WhereAttrByte(LowestScreen());
- /* Is this an unformatted screen? */
- if (!IsStartField(i)) { /* yes, handle separate */
- SendUnformatted();
- } else {
- do {
- if (HasMdt(i)) {
- i = SendField(i, cmd);
- } else {
- i = FieldInc(i);
- }
- } while (i != j);
- }
- }
- ourPTail += DataToNetwork(ourPTail, ourPHead-ourPTail, 1);
- if (EmptyChar()) {
- FlushChar();
- HadAid = 0; /* killed that buffer */
- }
- }
-
- /* A read buffer operation... */
-
- void
- DoReadBuffer()
- {
- register int i, j;
-
- if (AidByte) {
- AddChar(AidByte);
- } else {
- AddChar(AID_NONE);
- }
- AddChar(BufferTo3270_0(CursorAddress));
- AddChar(BufferTo3270_1(CursorAddress));
- i = j = LowestScreen();
- do {
- if (IsStartField(i)) {
- AddChar(ORDER_SF);
- AddChar(BufferTo3270_1(FieldAttributes(i)));
- } else {
- AddChar((char)disp_ebc[GetHost(i)]);
- }
- i = ScreenInc(i);
- } while (i != j);
- ourPTail += DataToNetwork(ourPTail, ourPHead-ourPTail, 1);
- if (EmptyChar()) {
- FlushChar();
- HadAid = 0; /* killed that buffer */
- }
- }
-
- /* Send some transparent data to the host */
-
- void
- SendTransparent(buffer, count)
- char *buffer;
- int count;
- {
- char stuff[3];
-
- stuff[0] = AID_NONE_PRINTER;
- stuff[1] = BufferTo3270_0(count);
- stuff[2] = BufferTo3270_1(count);
- DataToNetwork(stuff, sizeof stuff, 0);
- DataToNetwork(buffer, count, 1);
- }
-
-
- /* Try to send some data to host */
-
- void
- SendToIBM()
- {
- #if !defined(PURE3274)
- if (TransparentClock >= OutputClock) {
- if (HadAid) {
- AddChar(AidByte);
- HadAid = 0;
- } else {
- AddChar(AID_NONE_PRINTER);
- }
- do {
- ourPTail += DataToNetwork(ourPTail, ourPHead-ourPTail, 1);
- } while (!EmptyChar());
- FlushChar();
- } else if (HadAid) {
- DoReadModified(CMD_READ_MODIFIED);
- }
- #else /* !defined(PURE3274) */
- if (HadAid) {
- DoReadModified(CMD_READ_MODIFIED);
- }
- #endif /* !defined(PURE3274) */
- }
-
- /* This takes in one character from the keyboard and places it on the
- * screen.
- */
-
- static void
- OneCharacter(c, insert)
- int c; /* character (Ebcdic) to be shoved in */
- int insert; /* are we in insert mode? */
- {
- register int i, j;
-
- if (IsProtected(CursorAddress)) {
- RingBell("Protected Field");
- return;
- }
- if (insert) {
- /* is the last character in the field a blank or null? */
- i = ScreenDec(FieldInc(CursorAddress));
- j = GetHost(i);
- if (!Disspace(j)) {
- RingBell("No more room for insert");
- return;
- } else {
- for (j = ScreenDec(i); i != CursorAddress;
- j = ScreenDec(j), i = ScreenDec(i)) {
- AddHost(i, (char)GetHost(j));
- }
- }
- }
- AddHost(CursorAddress, c);
- TurnOnMdt(CursorAddress);
- CursorAddress = ScreenInc(CursorAddress);
- if (IsStartField(CursorAddress) &&
- ((FieldAttributes(CursorAddress)&ATTR_AUTO_SKIP_MASK) ==
- ATTR_AUTO_SKIP_VALUE)) {
- Tab();
- }
- }
-
- /*
- * AcceptKeystroke()
- *
- * Processes one keystroke.
- *
- * Returns:
- *
- * 0 if this keystroke was NOT processed.
- * 1 if everything went OK.
- */
-
- int
- AcceptKeystroke(scancode, shiftstate)
- unsigned int
- scancode, /* 3270 scancode */
- shiftstate; /* The shift state */
- {
- register int c;
- register int i;
- register int j;
- enum ctlrfcn ctlrfcn;
-
- if (scancode >= numberof(hits)) {
- ExitString(
- "Unknown scancode encountered in AcceptKeystroke.\n", 1);
- /*NOTREACHED*/
- }
- ctlrfcn = hits[scancode].hit[HITNUM(shiftstate)].ctlrfcn;
- c = hits[scancode].hit[HITNUM(shiftstate)].code;
-
- if (!UnLocked || HadAid) {
- if (HadAid) {
- SendToIBM();
- if (!EmptyChar()) {
- return 0; /* nothing to do */
- }
- }
- #if !defined(PURE3274)
- if (!HadAid && EmptyChar()) {
- if ((ctlrfcn == FCN_RESET) || (ctlrfcn == FCN_MASTER_RESET)) {
- UnLocked = 1;
- }
- }
- #endif /* !defined(PURE3274) */
- if (!UnLocked) {
- return 0;
- }
- }
-
- /* now, either empty, or haven't seen aid yet */
-
- #if !defined(PURE3274)
- /*
- * If we are in transparent (output) mode, do something special
- * with keystrokes.
- */
- if (TransparentClock == OutputClock) {
- if (ctlrfcn == FCN_AID) {
- UnLocked = 0;
- InsertMode = 0;
- AidByte = (c);
- HadAid = 1;
- } else {
- switch (ctlrfcn) {
- case FCN_ESCAPE:
- StopScreen(1);
- command(0);
- if (shell_active == 0) {
- ConnectScreen();
- }
- break;
-
- case FCN_RESET:
- case FCN_MASTER_RESET:
- UnLocked = 1;
- break;
-
- default:
- return 0;
- }
- }
- }
- #endif /* !defined(PURE3274) */
-
- if (ctlrfcn == FCN_CHARACTER) {
- /* Add the character to the buffer */
- OneCharacter(c, InsertMode);
- } else if (ctlrfcn == FCN_AID) { /* got Aid */
- if (c == AID_CLEAR) {
- LocalClearScreen(); /* Side effect is to clear 3270 */
- }
- ResetOiaOnlineA(&OperatorInformationArea);
- SetOiaTWait(&OperatorInformationArea);
- ResetOiaInsert(&OperatorInformationArea);
- InsertMode = 0; /* just like a 3278 */
- SetOiaSystemLocked(&OperatorInformationArea);
- SetOiaModified();
- UnLocked = 0;
- AidByte = c;
- HadAid = 1;
- SendToIBM();
- } else {
- switch (ctlrfcn) {
-
- case FCN_CURSEL:
- c = FieldAttributes(CursorAddress)&ATTR_DSPD_MASK;
- if (!FormattedScreen()
- || ((c != ATTR_DSPD_DSPD) && (c != ATTR_DSPD_HIGH))) {
- RingBell("Cursor not in selectable field");
- } else {
- i = ScreenInc(WhereAttrByte(CursorAddress));
- c = GetHost(i);
- if (c == DISP_QUESTION) {
- AddHost(i, DISP_GREATER_THAN);
- TurnOnMdt(i);
- } else if (c == DISP_GREATER_THAN) {
- AddHost(i, DISP_QUESTION);
- TurnOffMdt(i);
- } else if (c == DISP_BLANK || c == DISP_NULL
- || c == DISP_AMPERSAND) {
- UnLocked = 0;
- InsertMode = 0;
- ResetOiaOnlineA(&OperatorInformationArea);
- SetOiaTWait(&OperatorInformationArea);
- SetOiaSystemLocked(&OperatorInformationArea);
- ResetOiaInsert(&OperatorInformationArea);
- SetOiaModified();
- if (c == DISP_AMPERSAND) {
- TurnOnMdt(i); /* Only for & type */
- AidByte = AID_ENTER;
- } else {
- AidByte = AID_SELPEN;
- }
- HadAid = 1;
- SendToIBM();
- } else {
- RingBell(
- "Cursor not in a selectable field (designator)");
- }
- }
- break;
-
- #if !defined(PURE3274)
- case FCN_ERASE:
- if (IsProtected(ScreenDec(CursorAddress))) {
- RingBell("Protected Field");
- } else {
- CursorAddress = ScreenDec(CursorAddress);
- Delete(CursorAddress, ScreenInc(CursorAddress));
- }
- break;
- case FCN_WERASE:
- j = CursorAddress;
- i = ScreenDec(j);
- if (IsProtected(i)) {
- RingBell("Protected Field");
- } else {
- SetXIsProtected();
- while ((!XIsProtected(i) && Disspace(GetHost(i)))
- && (i != j)) {
- i = ScreenDec(i);
- }
- /* we are pointing at a character in a word, or
- * at a protected position
- */
- while ((!XIsProtected(i) && !Disspace(GetHost(i)))
- && (i != j)) {
- i = ScreenDec(i);
- }
- /* we are pointing at a space, or at a protected
- * position
- */
- CursorAddress = ScreenInc(i);
- Delete(CursorAddress, j);
- }
- break;
-
- case FCN_FERASE:
- if (IsProtected(CursorAddress)) {
- RingBell("Protected Field");
- } else {
- CursorAddress = ScreenInc(CursorAddress); /* for btab */
- BackTab();
- EraseEndOfField();
- }
- break;
-
- case FCN_RESET:
- if (InsertMode) {
- InsertMode = 0;
- ResetOiaInsert(&OperatorInformationArea);
- SetOiaModified();
- }
- break;
- case FCN_MASTER_RESET:
- if (InsertMode) {
- InsertMode = 0;
- ResetOiaInsert(&OperatorInformationArea);
- SetOiaModified();
- }
- RefreshScreen();
- break;
- #endif /* !defined(PURE3274) */
-
- case FCN_UP:
- CursorAddress = ScreenUp(CursorAddress);
- break;
-
- case FCN_LEFT:
- CursorAddress = ScreenDec(CursorAddress);
- break;
-
- case FCN_RIGHT:
- CursorAddress = ScreenInc(CursorAddress);
- break;
-
- case FCN_DOWN:
- CursorAddress = ScreenDown(CursorAddress);
- break;
-
- case FCN_DELETE:
- if (IsProtected(CursorAddress)) {
- RingBell("Protected Field");
- } else {
- Delete(CursorAddress, ScreenInc(CursorAddress));
- }
- break;
-
- case FCN_INSRT:
- InsertMode = !InsertMode;
- if (InsertMode) {
- SetOiaInsert(&OperatorInformationArea);
- } else {
- ResetOiaInsert(&OperatorInformationArea);
- }
- SetOiaModified();
- break;
-
- case FCN_HOME:
- Home();
- break;
-
- case FCN_NL:
- /* The algorithm is to look for the first unprotected
- * column after column 0 of the following line. Having
- * found that unprotected column, we check whether the
- * cursor-address-at-entry is at or to the right of the
- * LeftMargin AND the LeftMargin column of the found line
- * is unprotected. If this conjunction is true, then
- * we set the found pointer to the address of the LeftMargin
- * column in the found line.
- * Then, we set the cursor address to the found address.
- */
- i = SetBufferAddress(ScreenLine(ScreenDown(CursorAddress)), 0);
- j = ScreenInc(WhereAttrByte(CursorAddress));
- do {
- if (IsUnProtected(i)) {
- break;
- }
- /* Again (see comment in Home()), this COULD be a problem
- * with an unformatted screen.
- */
- /* If there was a field with only an attribute byte,
- * we may be pointing to the attribute byte of the NEXT
- * field, so just look at the next byte.
- */
- if (IsStartField(i)) {
- i = ScreenInc(i);
- } else {
- i = ScreenInc(FieldInc(i));
- }
- } while (i != j);
- if (!IsUnProtected(i)) { /* couldn't find unprotected */
- i = SetBufferAddress(0,0);
- }
- if (OptLeftMargin <= ScreenLineOffset(CursorAddress)) {
- if (IsUnProtected(SetBufferAddress(ScreenLine(i),
- OptLeftMargin))) {
- i = SetBufferAddress(ScreenLine(i), OptLeftMargin);
- }
- }
- CursorAddress = i;
- break;
-
- case FCN_EINP:
- if (!FormattedScreen()) {
- i = CursorAddress;
- TurnOffMdt(i);
- do {
- AddHost(i, 0);
- i = ScreenInc(i);
- } while (i != CursorAddress);
- } else {
- /*
- * The algorithm is: go through each unprotected
- * field on the screen, clearing it out. When
- * we are at the start of a field, skip that field
- * if its contents are protected.
- */
- i = j = FieldInc(CursorAddress);
- do {
- if (IsUnProtected(ScreenInc(i))) {
- i = ScreenInc(i);
- TurnOffMdt(i);
- do {
- AddHost(i, 0);
- i = ScreenInc(i);
- } while (!IsStartField(i));
- } else {
- i = FieldInc(i);
- }
- } while (i != j);
- }
- Home();
- break;
-
- case FCN_EEOF:
- EraseEndOfField();
- break;
-
- case FCN_SPACE:
- OneCharacter(DISP_BLANK, InsertMode); /* Add cent */
- break;
-
- case FCN_CENTSIGN:
- OneCharacter(DISP_CENTSIGN, InsertMode); /* Add cent */
- break;
-
- case FCN_FM:
- OneCharacter(DISP_FM, InsertMode); /* Add field mark */
- break;
-
- case FCN_DP:
- if (IsProtected(CursorAddress)) {
- RingBell("Protected Field");
- } else {
- OneCharacter(DISP_DUP, InsertMode);/* Add dup character */
- Tab();
- }
- break;
-
- case FCN_TAB:
- Tab();
- break;
-
- case FCN_BTAB:
- BackTab();
- break;
-
- #ifdef NOTUSED /* Actually, this is superseded by unix flow
- * control.
- */
- case FCN_XOFF:
- Flow = 0; /* stop output */
- break;
-
- case FCN_XON:
- if (!Flow) {
- Flow = 1; /* turn it back on */
- DoTerminalOutput();
- }
- break;
- #endif /* NOTUSED */
-
- #if !defined(PURE3274)
- case FCN_ESCAPE:
- /* FlushChar(); do we want to flush characters from before? */
- StopScreen(1);
- command(0);
- if (shell_active == 0) {
- ConnectScreen();
- }
- break;
-
- case FCN_DISC:
- StopScreen(1);
- suspend();
- setconnmode();
- ConnectScreen();
- break;
-
- case FCN_RESHOW:
- RefreshScreen();
- break;
-
- case FCN_SETTAB:
- OptColTabs[ScreenLineOffset(CursorAddress)] = 1;
- break;
-
- case FCN_DELTAB:
- OptColTabs[ScreenLineOffset(CursorAddress)] = 0;
- break;
-
- /*
- * Clear all tabs, home line, and left margin.
- */
- case FCN_CLRTAB:
- for (i = 0; i < sizeof OptColTabs; i++) {
- OptColTabs[i] = 0;
- }
- OptHome = 0;
- OptLeftMargin = 0;
- break;
-
- case FCN_COLTAB:
- ColTab();
- break;
-
- case FCN_COLBAK:
- ColBak();
- break;
-
- case FCN_INDENT:
- ColTab();
- OptLeftMargin = ScreenLineOffset(CursorAddress);
- break;
-
- case FCN_UNDENT:
- ColBak();
- OptLeftMargin = ScreenLineOffset(CursorAddress);
- break;
-
- case FCN_SETMRG:
- OptLeftMargin = ScreenLineOffset(CursorAddress);
- break;
-
- case FCN_SETHOM:
- OptHome = ScreenLine(CursorAddress);
- break;
-
- /*
- * Point to first character of next unprotected word on
- * screen.
- */
- case FCN_WORDTAB:
- i = CursorAddress;
- SetXIsProtected();
- while (!XIsProtected(i) && !Disspace(GetHost(i))) {
- i = ScreenInc(i);
- if (i == CursorAddress) {
- break;
- }
- }
- /* i is either protected, a space (blank or null),
- * or wrapped
- */
- while (XIsProtected(i) || Disspace(GetHost(i))) {
- i = ScreenInc(i);
- if (i == CursorAddress) {
- break;
- }
- }
- CursorAddress = i;
- break;
-
- case FCN_WORDBACKTAB:
- i = ScreenDec(CursorAddress);
- SetXIsProtected();
- while (XIsProtected(i) || Disspace(GetHost(i))) {
- i = ScreenDec(i);
- if (i == CursorAddress) {
- break;
- }
- }
- /* i is pointing to a character IN an unprotected word
- * (or i wrapped)
- */
- while (!Disspace(GetHost(i))) {
- i = ScreenDec(i);
- if (i == CursorAddress) {
- break;
- }
- }
- CursorAddress = ScreenInc(i);
- break;
-
- /* Point to last non-blank character of this/next
- * unprotected word.
- */
- case FCN_WORDEND:
- i = ScreenInc(CursorAddress);
- SetXIsProtected();
- while (XIsProtected(i) || Disspace(GetHost(i))) {
- i = ScreenInc(i);
- if (i == CursorAddress) {
- break;
- }
- }
- /* we are pointing at a character IN an
- * unprotected word (or we wrapped)
- */
- while (!Disspace(GetHost(i))) {
- i = ScreenInc(i);
- if (i == CursorAddress) {
- break;
- }
- }
- CursorAddress = ScreenDec(i);
- break;
-
- /* Get to last non-blank of this/next unprotected
- * field.
- */
- case FCN_FIELDEND:
- i = LastOfField(CursorAddress);
- if (i != CursorAddress) {
- CursorAddress = i; /* We moved; take this */
- } else {
- j = FieldInc(CursorAddress); /* Move to next field */
- i = LastOfField(j);
- if (i != j) {
- CursorAddress = i; /* We moved; take this */
- }
- /* else - nowhere else on screen to be; stay here */
- }
- break;
- #endif /* !defined(PURE3274) */
-
- default:
- /* We don't handle this yet */
- RingBell("Function not implemented");
- }
- }
- return 1; /* We did something! */
- }
-
-
- /*
- * We get data from the terminal. We keep track of the shift state
- * (including ALT, CONTROL), and then call AcceptKeystroke to actually
- * process any non-shift keys.
- */
-
- int
- DataFrom3270(buffer, count)
- unsigned char *buffer; /* where the data is */
- int count; /* how much data there is */
- {
- int origCount;
-
- origCount = count;
-
- while (count) {
- if (*buffer >= numberof(hits)) {
- ExitString("Unknown scancode encountered in DataFrom3270.\n", 1);
- /*NOTREACHED*/
- }
-
- switch (hits[*buffer].hit[HITNUM(rememberedshiftstate)].ctlrfcn) {
-
- case FCN_MAKE_SHIFT:
- rememberedshiftstate |= (SHIFT_RIGHT|SHIFT_UPSHIFT);
- break;
- case FCN_BREAK_SHIFT:
- rememberedshiftstate &= ~(SHIFT_RIGHT|SHIFT_UPSHIFT);
- break;
- case FCN_MAKE_ALT:
- rememberedshiftstate |= SHIFT_ALT;
- break;
- case FCN_BREAK_ALT:
- rememberedshiftstate &= ~SHIFT_ALT;
- break;
- default:
- if (AcceptKeystroke(*buffer, rememberedshiftstate) == 0) {
- return(origCount-count);
- }
- break;
- }
- buffer++;
- count--;
- }
- return(origCount-count);
- }
-