1 /*
2 * ManyMouse foundation code; apps talks to this and it talks to the lowlevel
3 * code for various platforms.
4 *
5 * Please see the file LICENSE.txt in the source's root directory.
6 *
7 * This file written by Ryan C. Gordon.
8 */
9
10 #include <stdlib.h>
11 #include "manymouse.h"
12
13 static const char *manymouse_copyright =
14 "ManyMouse " MANYMOUSE_VERSION " copyright (c) 2005-2012 Ryan C. Gordon.";
15
16 extern const ManyMouseDriver *ManyMouseDriver_windows;
17 extern const ManyMouseDriver *ManyMouseDriver_evdev;
18 extern const ManyMouseDriver *ManyMouseDriver_hidmanager;
19 extern const ManyMouseDriver *ManyMouseDriver_hidutilities;
20 extern const ManyMouseDriver *ManyMouseDriver_xinput2;
21
22 /*
23 * These have to be in the favored order...obviously it doesn't matter if the
24 * Linux driver comes before or after the Windows one, since one won't
25 * exist on a given platform, but things like Mac OS X's hidmanager (which
26 * only works on OS X 10.5 and later) should come before Mac OS X's
27 * hidutilities (which works on older systems, but may stop working in 10.6
28 * and later). In the Mac OS X case, you want to try the newer tech, and if
29 * it's not available (on 10.4 or earlier), fall back to trying the legacy
30 * code.
31 */
32 static const ManyMouseDriver **mice_drivers[] =
33 {
34 &ManyMouseDriver_evdev,
35 &ManyMouseDriver_xinput2,
36 &ManyMouseDriver_windows,
37 &ManyMouseDriver_hidmanager,
38 &ManyMouseDriver_hidutilities,
39 };
40
41
42 static const ManyMouseDriver *driver = NULL;
43
ManyMouse_Init(void)44 int ManyMouse_Init(void)
45 {
46 const int upper = (sizeof (mice_drivers) / sizeof (mice_drivers[0]));
47 int i;
48 int retval = -1;
49
50 /* impossible test to keep manymouse_copyright linked into the binary. */
51 if (manymouse_copyright == NULL)
52 return -1;
53
54 if (driver != NULL)
55 return -1;
56
57 for (i = 0; (i < upper) && (driver == NULL); i++)
58 {
59 const ManyMouseDriver *this_driver = *(mice_drivers[i]);
60 if (this_driver != NULL) /* if not built for this platform, skip it. */
61 {
62 const int mice = this_driver->init();
63 if (mice > retval)
64 retval = mice; /* may move from "error" to "no mice found". */
65
66 if (mice >= 0)
67 driver = this_driver;
68 } /* if */
69 } /* for */
70
71 return retval;
72 } /* ManyMouse_Init */
73
74
ManyMouse_Quit(void)75 void ManyMouse_Quit(void)
76 {
77 if (driver != NULL)
78 {
79 driver->quit();
80 driver = NULL;
81 } /* if */
82 } /* ManyMouse_Quit */
83
ManyMouse_DriverName(void)84 const char *ManyMouse_DriverName(void)
85 {
86 return (driver) ? driver->driver_name : NULL;
87 } /* ManyMouse_DriverName */
88
ManyMouse_DeviceName(unsigned int index)89 const char *ManyMouse_DeviceName(unsigned int index)
90 {
91 return (driver) ? driver->name(index) : NULL;
92 } /* ManyMouse_DeviceName */
93
ManyMouse_PollEvent(ManyMouseEvent * event)94 int ManyMouse_PollEvent(ManyMouseEvent *event)
95 {
96 return (driver) ? driver->poll(event) : 0;
97 } /* ManyMouse_PollEvent */
98
99 /* end of manymouse.c ... */
100
101