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SDL_sysjoystick.m
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "SDL_config.h"
22 
23 /* This is the system specific header for the SDL joystick API */
24 
25 #include "SDL_joystick.h"
26 #include "../SDL_sysjoystick.h"
27 #include "../SDL_joystick_c.h"
29 
30 const char *accelerometerName = "iPhone accelerometer";
31 
32 /* Function to scan the system for joysticks.
33  * This function should set SDL_numjoysticks to the number of available
34  * joysticks. Joystick 0 should be the system default joystick.
35  * It should return 0, or -1 on an unrecoverable fatal error.
36  */
37 int
39 {
40  return (1);
41 }
42 
44 {
45  return 1;
46 }
47 
49 {
50 }
51 
53 {
54  return SDL_FALSE;
55 }
56 
57 /* Function to get the device-dependent name of a joystick */
58 const char *
60 {
61  return accelerometerName;
62 }
63 
64 /* Function to perform the mapping from device index to the instance id for this index */
66 {
67  return device_index;
68 }
69 
70 /* Function to open a joystick for use.
71  The joystick to open is specified by the index field of the joystick.
72  This should fill the nbuttons and naxes fields of the joystick structure.
73  It returns 0, or -1 if there is an error.
74  */
75 int
76 SDL_SYS_JoystickOpen(SDL_Joystick * joystick, int device_index)
77 {
78  joystick->naxes = 3;
79  joystick->nhats = 0;
80  joystick->nballs = 0;
81  joystick->nbuttons = 0;
83  return 0;
84 }
85 
86 /* Function to determine is this joystick is attached to the system right now */
88 {
89  return SDL_TRUE;
90 }
91 
92 /* Function to update the state of a joystick - called as a device poll.
93  * This function shouldn't update the joystick structure directly,
94  * but instead should call SDL_PrivateJoystick*() to deliver events
95  * and update joystick device state.
96  */
97 void
99 {
100 
101  Sint16 orientation[3];
102 
103  if ([[SDLUIAccelerationDelegate sharedDelegate] hasNewData]) {
104 
107 
108  SDL_PrivateJoystickAxis(joystick, 0, orientation[0]);
109  SDL_PrivateJoystickAxis(joystick, 1, orientation[1]);
110  SDL_PrivateJoystickAxis(joystick, 2, orientation[2]);
111 
112  }
113 
114  return;
115 }
116 
117 /* Function to close a joystick after use */
118 void
120 {
121  if ([[SDLUIAccelerationDelegate sharedDelegate] isRunning]) {
123  }
124  SDL_SetError("No joystick open with that index");
125 }
126 
127 /* Function to perform any system-specific joystick related cleanup */
128 void
130 {
131 }
132 
134 {
135  SDL_JoystickGUID guid;
136  /* the GUID is just the first 16 chars of the name for now */
137  const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index );
138  SDL_zero( guid );
139  SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
140  return guid;
141 }
142 
144 {
145  SDL_JoystickGUID guid;
146  /* the GUID is just the first 16 chars of the name for now */
147  const char *name = joystick->name;
148  SDL_zero( guid );
149  SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
150  return guid;
151 }
152 
153 /* vi: set ts=4 sw=4 expandtab: */
int SDL_SYS_NumJoysticks()
SDL_bool
Definition: SDL_stdinc.h:116
Sint32 SDL_JoystickID
Definition: SDL_joystick.h:72
const char * accelerometerName
EGLImageKHR EGLint * name
Definition: eglext.h:284
void SDL_SYS_JoystickQuit(void)
int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
Definition: SDL_joystick.c:496
SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick)
void SDL_SYS_JoystickDetect()
DECLSPEC int SDLCALL SDL_SetError(const char *fmt,...)
Definition: SDL_error.c:53
const char * SDL_SYS_JoystickNameForDeviceIndex(int device_index)
static SDLUIAccelerationDelegate * sharedDelegate
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick *joystick)
SDL_bool SDL_SYS_JoystickNeedsPolling()
DECLSPEC size_t SDLCALL SDL_strlen(const char *str)
Definition: SDL_string.c:389
int SDL_SYS_JoystickInit(void)
DECLSPEC void *SDLCALL SDL_memcpy(void *dst, const void *src, size_t len)
Definition: SDL_string.c:293
int16_t Sint16
A signed 16-bit integer type.
Definition: SDL_stdinc.h:133
SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick, int device_index)
#define SDL_zero(x)
Definition: SDL_stdinc.h:254
#define SDL_min(x, y)
Definition: SDL_stdinc.h:244
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID(int device_index)
SDLUIAccelerationDelegate * sharedDelegate()