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manymouse.c
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manymouse.c
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/*
* ManyMouse foundation code; apps talks to this and it talks to the lowlevel
* code for various platforms.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#include <stdlib.h>
#include "manymouse.h"
static const char *manymouse_copyright =
"ManyMouse " MANYMOUSE_VERSION " copyright (c) 2005-2008 Ryan C. Gordon.";
extern const ManyMouseDriver *ManyMouseDriver_windows;
extern const ManyMouseDriver *ManyMouseDriver_evdev;
extern const ManyMouseDriver *ManyMouseDriver_hidmanager;
extern const ManyMouseDriver *ManyMouseDriver_hidutilities;
extern const ManyMouseDriver *ManyMouseDriver_xinput2;
/*
* These have to be in the favored order...obviously it doesn't matter if the
* Linux driver comes before or after the Windows one, since one won't
* exist on a given platform, but things like Mac OS X's hidmanager (which
* only works on OS X 10.5 and later) should come before Mac OS X's
* hidutilities (which works on older systems, but may stop working in 10.6
* and later). In the Mac OS X case, you want to try the newer tech, and if
* it's not available (on 10.4 or earlier), fall back to trying the legacy
* code.
*/
static const ManyMouseDriver **mice_drivers[] =
{
&ManyMouseDriver_xinput2,
&ManyMouseDriver_evdev,
&ManyMouseDriver_windows,
&ManyMouseDriver_hidmanager,
&ManyMouseDriver_hidutilities,
};
static const ManyMouseDriver *driver = NULL;
int ManyMouse_Init(void)
{
const int upper = (sizeof (mice_drivers) / sizeof (mice_drivers[0]));
int i;
int retval = -1;
/* impossible test to keep manymouse_copyright linked into the binary. */
if (manymouse_copyright == NULL)
return(-1);
if (driver != NULL)
return(-1);
for (i = 0; (i < upper) && (driver == NULL); i++)
{
const ManyMouseDriver *this_driver = *(mice_drivers[i]);
if (this_driver != NULL) /* if not built for this platform, skip it. */
{
const int mice = this_driver->init();
if (mice > retval)
retval = mice; /* may move from "error" to "no mice found". */
if (mice > 0)
driver = this_driver;
} /* if */
} /* for */
return(retval);
} /* ManyMouse_Init */
void ManyMouse_Quit(void)
{
if (driver != NULL)
driver->quit();
driver = NULL;
} /* ManyMouse_Quit */
const char *ManyMouse_DriverName(void)
{
return ((driver) ? driver->driver_name : NULL);
} /* ManyMouse_DriverName */
const char *ManyMouse_DeviceName(unsigned int index)
{
if (driver != NULL)
return(driver->name(index));
return(NULL);
} /* ManyMouse_PollEvent */
int ManyMouse_PollEvent(ManyMouseEvent *event)
{
if (driver != NULL)
return(driver->poll(event));
return(0);
} /* ManyMouse_PollEvent */
/* end of manymouse.c ... */