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annotate src/joystick/windows/SDL_mmjoystick.c @ 5092:327f181542f1

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Include windows.h in a single point in the source, so we can be consistent about the definition of UNICODE and have core utility functions for Windows that all modules can share. I think this also fixes the bug relating to non-latin characters in filenames, since UNICODE wasn't defined in SDL_rwops.c
author Sam Lantinga <slouken@libsdl.org>
date Mon, 24 Jan 2011 21:20:30 -0800
parents e8916fe9cfc8
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_JOYSTICK_WINMM
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25
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26 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */
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27
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327f181542f1 Include windows.h in a single point in the source, so we can be consistent about the definition of UNICODE and have core utility functions for Windows that all modules can share.
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28 #include "../../core/windows/SDL_windows.h"
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c71e05b4dc2e More header massaging... works great on Windows. ;-)
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29 #include <mmsystem.h>
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30 #include <regstr.h>
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31
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32 #include "SDL_events.h"
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33 #include "SDL_joystick.h"
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34 #include "../SDL_sysjoystick.h"
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35 #include "../SDL_joystick_c.h"
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36
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37 #define MAX_JOYSTICKS 16
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38 #define MAX_AXES 6 /* each joystick can have up to 6 axes */
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39 #define MAX_BUTTONS 32 /* and 32 buttons */
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40 #define AXIS_MIN -32768 /* minimum value for axis coordinate */
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41 #define AXIS_MAX 32767 /* maximum value for axis coordinate */
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42 /* limit axis to 256 possible positions to filter out noise */
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43 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256)
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44 #define JOY_BUTTON_FLAG(n) (1<<n)
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45
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46
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47 /* array to hold joystick ID values */
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48 static UINT SYS_JoystickID[MAX_JOYSTICKS];
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49 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS];
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50 static char *SYS_JoystickName[MAX_JOYSTICKS];
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51
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52 /* The private structure used to keep track of a joystick */
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53 struct joystick_hwdata
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54 {
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55 /* joystick ID */
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56 UINT id;
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57
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58 /* values used to translate device-specific coordinates into
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59 SDL-standard ranges */
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60 struct _transaxis
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61 {
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62 int offset;
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63 float scale;
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64 } transaxis[6];
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65 };
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66
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67 /* Convert a Windows Multimedia API return code to a text message */
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68 static void SetMMerror(char *function, int code);
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69
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70
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71 static char *
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72 GetJoystickName(int index, const char *szRegKey)
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73 {
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74 /* added 7/24/2004 by Eckhard Stolberg */
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75 /*
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76 see if there is a joystick for the current
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77 index (1-16) listed in the registry
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78 */
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79 char *name = NULL;
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80 HKEY hTopKey;
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81 HKEY hKey;
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82 DWORD regsize;
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83 LONG regresult;
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84 char regkey[256];
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85 char regvalue[256];
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86 char regname[256];
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87
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88 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s\\%s",
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89 REGSTR_PATH_JOYCONFIG, szRegKey, REGSTR_KEY_JOYCURR);
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90 hTopKey = HKEY_LOCAL_MACHINE;
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91 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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92 if (regresult != ERROR_SUCCESS) {
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93 hTopKey = HKEY_CURRENT_USER;
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94 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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95 }
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96 if (regresult != ERROR_SUCCESS) {
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97 return NULL;
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98 }
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99
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100 /* find the registry key name for the joystick's properties */
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101 regsize = sizeof(regname);
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102 SDL_snprintf(regvalue, SDL_arraysize(regvalue), "Joystick%d%s", index + 1,
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103 REGSTR_VAL_JOYOEMNAME);
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104 regresult =
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105 RegQueryValueExA(hKey, regvalue, 0, 0, (LPBYTE) regname, &regsize);
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106 RegCloseKey(hKey);
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107
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108 if (regresult != ERROR_SUCCESS) {
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109 return NULL;
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110 }
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111
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112 /* open that registry key */
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113 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s", REGSTR_PATH_JOYOEM,
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114 regname);
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115 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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116 if (regresult != ERROR_SUCCESS) {
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117 return NULL;
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118 }
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119
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120 /* find the size for the OEM name text */
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121 regsize = sizeof(regvalue);
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122 regresult =
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123 RegQueryValueExA(hKey, REGSTR_VAL_JOYOEMNAME, 0, 0, NULL, &regsize);
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124 if (regresult == ERROR_SUCCESS) {
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125 /* allocate enough memory for the OEM name text ... */
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126 name = (char *) SDL_malloc(regsize);
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127 if (name) {
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128 /* ... and read it from the registry */
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129 regresult = RegQueryValueExA(hKey,
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130 REGSTR_VAL_JOYOEMNAME, 0, 0,
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131 (LPBYTE) name, &regsize);
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132 }
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133 }
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134 RegCloseKey(hKey);
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135
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136 return (name);
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137 }
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138
0
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139 /* Function to scan the system for joysticks.
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140 * This function should set SDL_numjoysticks to the number of available
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141 * joysticks. Joystick 0 should be the system default joystick.
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142 * It should return 0, or -1 on an unrecoverable fatal error.
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143 */
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144 int
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145 SDL_SYS_JoystickInit(void)
0
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146 {
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147 int i;
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148 int maxdevs;
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149 int numdevs;
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150 JOYINFOEX joyinfo;
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151 JOYCAPS joycaps;
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152 MMRESULT result;
0
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153
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154 /* Reset the joystick ID & name mapping tables */
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155 for (i = 0; i < MAX_JOYSTICKS; ++i) {
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156 SYS_JoystickID[i] = 0;
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157 SYS_JoystickName[i] = NULL;
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158 }
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159
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160 /* Loop over all potential joystick devices */
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161 numdevs = 0;
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162 maxdevs = joyGetNumDevs();
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163 for (i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i) {
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164
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165 joyinfo.dwSize = sizeof(joyinfo);
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166 joyinfo.dwFlags = JOY_RETURNALL;
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167 result = joyGetPosEx(i, &joyinfo);
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168 if (result == JOYERR_NOERROR) {
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169 result = joyGetDevCaps(i, &joycaps, sizeof(joycaps));
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170 if (result == JOYERR_NOERROR) {
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171 SYS_JoystickID[numdevs] = i;
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172 SYS_Joystick[numdevs] = joycaps;
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173 SYS_JoystickName[numdevs] =
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174 GetJoystickName(i, joycaps.szRegKey);
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175 numdevs++;
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176 }
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177 }
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178 }
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179 return (numdevs);
0
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180 }
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181
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182 /* Function to get the device-dependent name of a joystick */
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183 const char *
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184 SDL_SYS_JoystickName(int index)
0
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185 {
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186 if (SYS_JoystickName[index] != NULL) {
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187 return (SYS_JoystickName[index]);
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188 } else {
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189 return (SYS_Joystick[index].szPname);
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190 }
0
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191 }
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192
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193 /* Function to open a joystick for use.
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194 The joystick to open is specified by the index field of the joystick.
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195 This should fill the nbuttons and naxes fields of the joystick structure.
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196 It returns 0, or -1 if there is an error.
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197 */
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198 int
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199 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
0
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200 {
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201 int index, i;
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202 int caps_flags[MAX_AXES - 2] =
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203 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV };
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204 int axis_min[MAX_AXES], axis_max[MAX_AXES];
0
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205
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206
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207 /* shortcut */
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208 index = joystick->index;
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209 axis_min[0] = SYS_Joystick[index].wXmin;
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210 axis_max[0] = SYS_Joystick[index].wXmax;
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211 axis_min[1] = SYS_Joystick[index].wYmin;
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212 axis_max[1] = SYS_Joystick[index].wYmax;
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213 axis_min[2] = SYS_Joystick[index].wZmin;
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214 axis_max[2] = SYS_Joystick[index].wZmax;
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215 axis_min[3] = SYS_Joystick[index].wRmin;
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216 axis_max[3] = SYS_Joystick[index].wRmax;
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217 axis_min[4] = SYS_Joystick[index].wUmin;
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218 axis_max[4] = SYS_Joystick[index].wUmax;
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219 axis_min[5] = SYS_Joystick[index].wVmin;
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220 axis_max[5] = SYS_Joystick[index].wVmax;
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221
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222 /* allocate memory for system specific hardware data */
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223 joystick->hwdata =
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224 (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata));
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225 if (joystick->hwdata == NULL) {
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226 SDL_OutOfMemory();
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227 return (-1);
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228 }
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229 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
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230
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231 /* set hardware data */
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232 joystick->hwdata->id = SYS_JoystickID[index];
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233 for (i = 0; i < MAX_AXES; ++i) {
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234 if ((i < 2) || (SYS_Joystick[index].wCaps & caps_flags[i - 2])) {
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235 joystick->hwdata->transaxis[i].offset = AXIS_MIN - axis_min[i];
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236 joystick->hwdata->transaxis[i].scale =
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237 (float) (AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]);
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238 } else {
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239 joystick->hwdata->transaxis[i].offset = 0;
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240 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */
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241 }
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242 }
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243
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244 /* fill nbuttons, naxes, and nhats fields */
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245 joystick->nbuttons = SYS_Joystick[index].wNumButtons;
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246 joystick->naxes = SYS_Joystick[index].wNumAxes;
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247 if (SYS_Joystick[index].wCaps & JOYCAPS_HASPOV) {
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248 joystick->nhats = 1;
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249 } else {
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250 joystick->nhats = 0;
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251 }
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252 return (0);
0
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253 }
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254
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255 static Uint8
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256 TranslatePOV(DWORD value)
0
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257 {
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258 Uint8 pos;
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259
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260 pos = SDL_HAT_CENTERED;
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261 if (value != JOY_POVCENTERED) {
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262 if ((value > JOY_POVLEFT) || (value < JOY_POVRIGHT)) {
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263 pos |= SDL_HAT_UP;
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264 }
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265 if ((value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD)) {
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266 pos |= SDL_HAT_RIGHT;
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267 }
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268 if ((value > JOY_POVRIGHT) && (value < JOY_POVLEFT)) {
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269 pos |= SDL_HAT_DOWN;
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270 }
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271 if (value > JOY_POVBACKWARD) {
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272 pos |= SDL_HAT_LEFT;
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273 }
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274 }
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275 return (pos);
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276 }
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277
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278 /* Function to update the state of a joystick - called as a device poll.
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279 * This function shouldn't update the joystick structure directly,
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280 * but instead should call SDL_PrivateJoystick*() to deliver events
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281 * and update joystick device state.
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282 */
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283 void
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284 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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285 {
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286 MMRESULT result;
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287 int i;
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288 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ,
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289 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV
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290 };
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291 DWORD pos[MAX_AXES];
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292 struct _transaxis *transaxis;
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293 int value, change;
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294 JOYINFOEX joyinfo;
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295
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296 joyinfo.dwSize = sizeof(joyinfo);
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297 joyinfo.dwFlags = JOY_RETURNALL | JOY_RETURNPOVCTS;
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298 if (!joystick->hats) {
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299 joyinfo.dwFlags &= ~(JOY_RETURNPOV | JOY_RETURNPOVCTS);
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300 }
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301 result = joyGetPosEx(joystick->hwdata->id, &joyinfo);
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302 if (result != JOYERR_NOERROR) {
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303 SetMMerror("joyGetPosEx", result);
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304 return;
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305 }
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306
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307 /* joystick motion events */
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308 pos[0] = joyinfo.dwXpos;
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309 pos[1] = joyinfo.dwYpos;
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310 pos[2] = joyinfo.dwZpos;
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311 pos[3] = joyinfo.dwRpos;
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312 pos[4] = joyinfo.dwUpos;
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313 pos[5] = joyinfo.dwVpos;
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314
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315 transaxis = joystick->hwdata->transaxis;
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316 for (i = 0; i < joystick->naxes; i++) {
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317 if (joyinfo.dwFlags & flags[i]) {
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318 value =
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319 (int) (((float) pos[i] +
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320 transaxis[i].offset) * transaxis[i].scale);
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321 change = (value - joystick->axes[i]);
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322 if ((change < -JOY_AXIS_THRESHOLD)
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323 || (change > JOY_AXIS_THRESHOLD)) {
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324 SDL_PrivateJoystickAxis(joystick, (Uint8) i, (Sint16) value);
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325 }
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326 }
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327 }
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328
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329 /* joystick button events */
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330 if (joyinfo.dwFlags & JOY_RETURNBUTTONS) {
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331 for (i = 0; i < joystick->nbuttons; ++i) {
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332 if (joyinfo.dwButtons & JOY_BUTTON_FLAG(i)) {
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333 if (!joystick->buttons[i]) {
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334 SDL_PrivateJoystickButton(joystick, (Uint8) i,
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335 SDL_PRESSED);
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336 }
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337 } else {
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338 if (joystick->buttons[i]) {
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339 SDL_PrivateJoystickButton(joystick, (Uint8) i,
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340 SDL_RELEASED);
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341 }
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342 }
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343 }
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344 }
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345
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346 /* joystick hat events */
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347 if (joyinfo.dwFlags & JOY_RETURNPOV) {
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348 Uint8 pos;
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349
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350 pos = TranslatePOV(joyinfo.dwPOV);
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351 if (pos != joystick->hats[0]) {
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352 SDL_PrivateJoystickHat(joystick, 0, pos);
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353 }
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354 }
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355 }
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356
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357 /* Function to close a joystick after use */
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358 void
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359 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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diff changeset
360 {
1895
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diff changeset
361 if (joystick->hwdata != NULL) {
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362 /* free system specific hardware data */
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diff changeset
363 SDL_free(joystick->hwdata);
3610
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Ryan C. Gordon <icculus@icculus.org>
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364 joystick->hwdata = NULL;
1895
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diff changeset
365 }
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366 }
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diff changeset
367
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368 /* Function to perform any system-specific joystick related cleanup */
1895
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369 void
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370 SDL_SYS_JoystickQuit(void)
0
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371 {
1895
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diff changeset
372 int i;
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diff changeset
373 for (i = 0; i < MAX_JOYSTICKS; i++) {
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diff changeset
374 if (SYS_JoystickName[i] != NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
375 SDL_free(SYS_JoystickName[i]);
3610
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
376 SYS_JoystickName[i] = NULL;
1895
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377 }
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diff changeset
378 }
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379 }
74212992fb08 Initial revision
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diff changeset
380
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diff changeset
381
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382 /* implementation functions */
1895
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diff changeset
383 void
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
384 SetMMerror(char *function, int code)
0
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diff changeset
385 {
1895
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
386 static char *error;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
387 static char errbuf[1024];
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1748
diff changeset
389 errbuf[0] = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
390 switch (code) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
391 case MMSYSERR_NODRIVER:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1748
diff changeset
392 error = "Joystick driver not present";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
393 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
394
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
395 case MMSYSERR_INVALPARAM:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
396 case JOYERR_PARMS:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
397 error = "Invalid parameter(s)";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
398 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
399
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
400 case MMSYSERR_BADDEVICEID:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
401 error = "Bad device ID";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
402 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
404 case JOYERR_UNPLUGGED:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
405 error = "Joystick not attached";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
406 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
408 case JOYERR_NOCANDO:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
409 error = "Can't capture joystick input";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
410 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
412 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
413 SDL_snprintf(errbuf, SDL_arraysize(errbuf),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
414 "%s: Unknown Multimedia system error: 0x%x",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
415 function, code);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
416 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
417 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
419 if (!errbuf[0]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
420 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
421 error);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
422 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
423 SDL_SetError("%s", errbuf);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 }
1635
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
425
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
426 #endif /* SDL_JOYSTICK_WINMM */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1748
diff changeset
427 /* vi: set ts=4 sw=4 expandtab: */