Sweden-Number/dlls/winedos/int09.c

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/*
* DOS interrupt 09h handler (IRQ1 - KEYBOARD)
*
* Copyright 1999 Ove K<EFBFBD>ven
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "miscemu.h"
#include "wine/debug.h"
#include "dosexe.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
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#define QUEUELEN 31
static struct
{
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BYTE queuelen,queue[QUEUELEN],ascii[QUEUELEN];
} kbdinfo;
/**********************************************************************
* DOSVM_Int09Handler
*
* Handler for int 09h.
*/
void WINAPI DOSVM_Int09Handler( CONTEXT86 *context )
{
BYTE ascii, scan = DOSVM_Int09ReadScan(&ascii);
BYTE ch[2];
int cnt, c2;
TRACE("scan=%02x\n",scan);
if (!(scan & 0x80)) {
if (ascii) {
/* we already have an ASCII code, no translation necessary */
ch[0] = ascii;
cnt = 1;
} else {
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UINT vkey = MapVirtualKeyA(scan&0x7f, 1);
BYTE keystate[256];
GetKeyboardState(keystate);
cnt = ToAscii(vkey, scan, keystate, (LPWORD)ch, 0);
}
if (cnt>0) {
for (c2=0; c2<cnt; c2++)
DOSVM_Int16AddChar(ch[c2], scan);
} else
if (cnt==0) {
/* FIXME: need to handle things like shift-F-keys,
* 0xE0 extended keys, etc */
DOSVM_Int16AddChar(0, scan);
}
}
DOSVM_PIC_ioport_out( 0x20, 0x20 ); /* send EOI */
}
static void KbdRelay( CONTEXT86 *context, void *data )
{
if (kbdinfo.queuelen) {
/* cleanup operation, called from DOSVM_PIC_ioport_out:
* we'll remove current scancode from keyboard buffer here,
* rather than in ReadScan, because some DOS apps depend on
* the scancode being available for reading multiple times... */
if (--kbdinfo.queuelen) {
memmove(kbdinfo.queue,kbdinfo.queue+1,kbdinfo.queuelen);
memmove(kbdinfo.ascii,kbdinfo.ascii+1,kbdinfo.queuelen);
}
}
}
void WINAPI DOSVM_Int09SendScan( BYTE scan, BYTE ascii )
{
if (kbdinfo.queuelen == QUEUELEN) {
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ERR("keyboard queue overflow\n");
return;
}
/* add scancode to queue */
kbdinfo.queue[kbdinfo.queuelen] = scan;
kbdinfo.ascii[kbdinfo.queuelen++] = ascii;
/* tell app to read it by triggering IRQ 1 (int 09) */
DOSVM_QueueEvent(1,DOS_PRIORITY_KEYBOARD,KbdRelay,NULL);
}
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/**********************************************************************
* KbdReadScan (WINEDOS.@)
*/
BYTE WINAPI DOSVM_Int09ReadScan( BYTE*ascii )
{
if (ascii) *ascii = kbdinfo.ascii[0];
return kbdinfo.queue[0];
}