Joystick API

diff -urN --exclude CVS qemu/joystick/joystick.c qemu-joystick/joystick/joystick.c
@@ -0,0 +1,148 @@
+/*  QEMU joystick API
+ *
+ *  Copyright (C) 2007 Jonathan Phénix
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "joystick_int.h"
+
+static const JoyDriver *joy_driver_table[] = {
+#if 0
+#ifdef CONFIG_JOY_LINUX
+    &joy_driver_linux,
+#endif
+#ifdef CONFIG_SDL
+    &joy_driver_sdl,
+#endif
+#endif
+    &joy_driver_null,
+    NULL,
+};
+
+JoyState *qemu_joy_init(JoyButtonCB but_cb, JoyAxisCB axis_cb, void *opaque)
+{
+    const JoyDriver **ptr;
+    JoyState *s;
+
+#ifdef JOY_SAFE
+    if (!but_cb || !axis_cb)
+        return NULL;
+#endif
+
+    ptr = joy_driver_table;
+
+    while (*ptr) {
+        if ((*ptr)->probe() == JOY_OK)
+            break;
+        ptr++;
+    }
+
+    if (!ptr) {
+        /* This should never happens, the null driver should catch it but we are never too careful */
+        qemu_joy_log("%s: No suitable joystick driver\n", __func__);
+        qemu_free(s);
+        return NULL;
+    }
+
+    s = qemu_mallocz(sizeof(*s) + (*ptr)->size);
+    if (!s)
+        return NULL;
+
+    s->driver = *ptr;
+
+    s->joy_but_cb = but_cb;
+    s->joy_axis_cb = axis_cb;
+    s->cb_opaque = opaque;
+
+    s->driver->init(s);
+
+    return s;
+}
+
+JoyError qemu_joy_open(JoyState *s, unsigned int devno)
+{
+#ifdef JOY_SAFE
+    if (devno >= JOY_MAX || !s)
+        return JOY_EINVAL;
+#endif
+    return s->driver->open(s, devno);
+}
+
+JoyError qemu_joy_close(JoyState *s, unsigned int devno)
+{
+#ifdef JOY_SAFE
+    if (devno >= JOY_MAX || !s)
+        return JOY_EINVAL;
+#endif
+
+    return s->driver->close(s, devno);
+}
+
+JoyError qemu_joy_get_info(JoyState *s, unsigned int devno, JoyInfo *info)
+{
+#ifdef JOY_SAFE
+    if (devno >= JOY_MAX || !s || !info)
+        return JOY_EINVAL;
+#endif
+
+    memset(info, 0, sizeof(*info));
+
+    return s->driver->get_info(s, devno, info);
+}
+
+unsigned int qemu_joy_nr(JoyState *s)
+{
+#ifdef JOY_SAFE
+    if (!s)
+        return 0;
+#endif
+
+    return s->driver->nr(s);
+}
+
+void qemu_joy_flush(JoyState *s)
+{
+#ifdef JOY_SAFE
+    if (!s)
+        return;
+#endif
+
+    if (s->driver->flush)
+        s->driver->flush(s);
+}
+
+void qemu_joy_enable(JoyState *s)
+{
+#ifdef JOY_SAFE
+    if (!s)
+        return;
+#endif
+
+    if (s->driver->enable)
+        s->driver->enable(s);
+}
+
+extern FILE *logfile;
+
+void qemu_joy_log(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vfprintf(logfile ? logfile : stderr, fmt, ap);
+    va_end(ap);
+}
+

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