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/*
* VBMouse - VirtualBox communication routines
* Copyright (C) 2022 Javier S. Pedro
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef VBOX_H
#define VBOX_H
#include <stdbool.h>
#include <stdint.h>
/** Logs a single character to the VBox debug message port. */
static void vbox_logc(char c);
#pragma aux vbox_logc = \
"mov dx, 0x504" \
"out dx, al" \
__parm [al] \
__modify [dx]
/** Logs a string to the VBox debug message port. */
static void vbox_logs(const char __far *str);
#pragma aux vbox_logs = \
"mov di, si" \
"xor cx, cx" \
"not cx" /* First we have to strlen(str), prepare -1 as max length */ \
"xor al, al" /* The '\0' that we're searching for */ \
"cld" \
"repne scas byte ptr es:[di]" /* afterwards, cx = -(len+2) */ \
"not cx" /* cx = (len+1) */ \
"dec cx" /* cx = len */ \
"mov dx, 0x504" /* And now we can write the string */ \
"rep outs dx, byte ptr es:[si]" \
__parm [es si] \
__modify [ax cx dx si di]
/** Logs a single character followed by '\n' to force log flush.
* A life-saver when there is no data segment available. */
#define vbox_putc(c) do { \
vbox_logc(c); vbox_logc('\n'); \
} while (0);
extern int vbox_init(void);
extern int vbox_report_guest_info(uint32_t osType);
extern int vbox_set_filter_mask(uint32_t add, uint32_t remove);
extern int vbox_set_mouse(bool enable);
extern int vbox_get_mouse(bool *abs, uint16_t *xpos, uint16_t *ypos);
extern void vbox_init_callbacks();
extern void vbox_deinit_callbacks();
// In CALLBACKS segment:
extern int vbox_get_mouse_locked(bool *abs, uint16_t *xpos, uint16_t *ypos);
#endif
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