initial import

1 files changed, 73 insertions, 0 deletions

diff --git a/vbox.h b/vbox.h
new file mode 100644
index 0000000..c711dd1
--- /dev/null
+++ b/vbox.h
@@ -0,0 +1,73 @@
+/*
+ * 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