412 lines
9.1 KiB
C
412 lines
9.1 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[] = "@(#)apilib.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include "../ctlr/api.h"
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#include "apilib.h"
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int
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api_sup_errno = 0, /* Supervisor error number */
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api_sup_fcn_id = 0, /* Supervisor function id (0x12) */
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api_fcn_errno = 0, /* Function error number */
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api_fcn_fcn_id = 0; /* Function ID (0x6b, etc.) */
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static int
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gate_sessmgr = 0,
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gate_keyboard = 0,
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gate_copy = 0,
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gate_oiam = 0;
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/*
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* Issue an API request, with reg structures supplied by the caller.
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*
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* Only certain routines need this (supervisor services come to mind).
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*/
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static int
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api_issue_regs(ah, al, bh, bl, cx, dx, parms, length, regs, sregs)
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int ah, al, bh, bl, cx, dx;
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char *parms;
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int length;
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union REGS *regs;
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struct SREGS *sregs;
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{
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char far *ourseg = parms;
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regs->h.ah = ah;
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regs->h.al = al;
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regs->h.bh = bh;
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regs->h.bl = bl;
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regs->x.cx = cx;
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regs->x.dx = dx;
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sregs->es = FP_SEG(ourseg);
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regs->x.di = FP_OFF(ourseg);
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#if defined(MSDOS)
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int86x(API_INTERRUPT_NUMBER, regs, regs, sregs);
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#endif /* defined(MSDOS) */
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#if defined(unix)
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api_exch_api(regs, sregs, parms, length);
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#endif /* defined(unix) */
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if (regs->h.cl != 0) {
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api_sup_errno = regs->h.cl;
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return -1;
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} else {
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return 0;
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}
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}
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/*
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* Issue an API request without requiring caller to supply
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* registers. Most routines use this.
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*/
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static int
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api_issue(ah, al, bh, bl, cx, dx, parms, length)
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int
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ah,
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al,
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bh,
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bl,
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cx,
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dx;
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char *parms;
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int length; /* Length of parms */
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{
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union REGS regs;
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struct SREGS sregs;
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return api_issue_regs(ah, al, bh, bl, cx, dx, parms, length, ®s, &sregs);
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}
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/*
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* Supervisor Services
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*/
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int
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api_name_resolve(name)
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char *name;
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{
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NameResolveParms parms;
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int i;
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union REGS regs;
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struct SREGS sregs;
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for (i = 0; i < sizeof parms.gate_name; i++) {
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if (*name) {
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parms.gate_name[i] = *name++;
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} else {
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parms.gate_name[i] = ' ';
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}
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}
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if (api_issue_regs(NAME_RESOLUTION, 0, 0, 0, 0, 0, (char *) &parms,
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sizeof parms, ®s, &sregs) == -1) {
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return -1;
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} else {
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return regs.x.dx;
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}
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}
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#if defined(unix)
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/*
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* Block until the oia or ps is modified.
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*/
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int
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api_ps_or_oia_modified()
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{
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union REGS regs;
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struct SREGS sregs;
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if (api_issue_regs(PS_OR_OIA_MODIFIED, 0, 0, 0, 0, 0, (char *) 0,
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0, ®s, &sregs) == -1) {
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return -1;
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} else {
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return 0;
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}
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}
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#endif /* defined(unix) */
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/*
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* Session Information Services
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*/
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api_query_session_id(parms)
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QuerySessionIdParms *parms;
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{
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if (api_issue(0x09, QUERY_SESSION_ID, 0x80, 0x20, 0,
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gate_sessmgr, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_query_session_parameters(parms)
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QuerySessionParametersParms *parms;
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{
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if (api_issue(0x09, QUERY_SESSION_PARAMETERS, 0x80, 0x20, 0,
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gate_sessmgr, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_query_session_cursor(parms)
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QuerySessionCursorParms *parms;
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{
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if (api_issue(0x09, QUERY_SESSION_CURSOR, 0x80, 0x20, 0xff,
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gate_sessmgr, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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/*
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* Keyboard Services
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*/
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api_connect_to_keyboard(parms)
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ConnectToKeyboardParms *parms;
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{
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if (api_issue(0x09, CONNECT_TO_KEYBOARD, 0x80, 0x20, 0,
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gate_keyboard, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_disconnect_from_keyboard(parms)
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DisconnectFromKeyboardParms *parms;
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{
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if (api_issue(0x09, DISCONNECT_FROM_KEYBOARD, 0x80, 0x20, 0,
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gate_keyboard, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_write_keystroke(parms)
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WriteKeystrokeParms *parms;
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{
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if (api_issue(0x09, WRITE_KEYSTROKE, 0x80, 0x20, 0,
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gate_keyboard, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_disable_input(parms)
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DisableInputParms *parms;
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{
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if (api_issue(0x09, DISABLE_INPUT, 0x80, 0x20, 0,
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gate_keyboard, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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api_enable_input(parms)
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EnableInputParms *parms;
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{
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if (api_issue(0x09, ENABLE_INPUT, 0x80, 0x20, 0,
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gate_keyboard, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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/*
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* Copy Services
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*/
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api_copy_string(parms)
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CopyStringParms *parms;
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{
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if (api_issue(0x09, COPY_STRING, 0x80, 0x20, 0xff,
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gate_copy, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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/*
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* Operator Information Area Services
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*/
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api_read_oia_group(parms)
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ReadOiaGroupParms *parms;
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{
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if (api_issue(0x09, READ_OIA_GROUP, 0x80, 0x20, 0xff,
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gate_oiam, (char *)parms, sizeof *parms) == -1) {
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api_fcn_errno = 0;
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api_fcn_fcn_id = 0;
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return -1;
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} else if (parms->rc == 0) {
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return 0;
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} else {
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api_fcn_errno = parms->rc;
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api_fcn_fcn_id = parms->function_id;
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return -1;
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}
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}
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/*
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* The "we are done" routine. This gets called last.
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*/
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api_finish()
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{
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#if defined(unix)
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if (api_close_api() == -1) {
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return -1;
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} else {
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return 0;
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}
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#endif /* defined(unix) */
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}
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/*
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* The initialization routine. Be sure to call this first.
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*/
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api_init()
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{
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#if defined(MSDOS)
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union REGS regs;
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struct SREGS sregs;
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regs.h.ah = 0x35;
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regs.h.al = API_INTERRUPT_NUMBER;
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intdosx(®s, ®s, &sregs);
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if ((regs.x.bx == 0) && (sregs.es == 0)) {
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return 0; /* Interrupt not being handled */
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}
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#endif /* defined(MSDOS) */
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#if defined(unix)
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if (api_open_api((char *)0) == -1) {
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return 0;
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}
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#endif /* defined(unix) */
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gate_sessmgr = api_name_resolve("SESSMGR");
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gate_keyboard = api_name_resolve("KEYBOARD");
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gate_copy = api_name_resolve("COPY");
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gate_oiam = api_name_resolve("OIAM");
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if ((gate_sessmgr == gate_keyboard) ||
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(gate_sessmgr == gate_copy) ||
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(gate_sessmgr == gate_oiam) ||
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(gate_keyboard == gate_copy) ||
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(gate_keyboard == gate_oiam) ||
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(gate_copy == gate_oiam)) {
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return 0; /* Interrupt doesn't seem correct */
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}
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return 1;
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}
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