annotate src/joystick/win32/SDL_mmjoystick.c @ 3294:470d0a416aa7

Fixed bug #714 fuzzyTew@gmail.com 2009-03-14 15:18:45 PDT patch to change HAVE_ICONV to HAVE_ICONV_H There are two separate iconv checks in configure -- one for the header file and one for the library. include/SDL_stdinc.h uses the library define to see whether or not it should reference the types defined in the header, which naturally breaks if the library exists and the header does not.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 11:04:01 +0000
parents 99210400e8b9
children 3c1b39d0d1a6
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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28 #define WIN32_LEAN_AND_MEAN
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29 #include <windows.h>
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30 #include <mmsystem.h>
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31 #include <regstr.h>
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32
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33 #include "SDL_events.h"
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34 #include "SDL_joystick.h"
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35 #include "../SDL_sysjoystick.h"
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36 #include "../SDL_joystick_c.h"
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37
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38 #define MAX_JOYSTICKS 16
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39 #define MAX_AXES 6 /* each joystick can have up to 6 axes */
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40 #define MAX_BUTTONS 32 /* and 32 buttons */
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41 #define AXIS_MIN -32768 /* minimum value for axis coordinate */
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42 #define AXIS_MAX 32767 /* maximum value for axis coordinate */
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43 /* limit axis to 256 possible positions to filter out noise */
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44 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256)
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45 #define JOY_BUTTON_FLAG(n) (1<<n)
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46
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47
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48 /* array to hold joystick ID values */
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49 static UINT SYS_JoystickID[MAX_JOYSTICKS];
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50 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS];
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51 static char *SYS_JoystickName[MAX_JOYSTICKS];
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52
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53 /* The private structure used to keep track of a joystick */
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54 struct joystick_hwdata
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55 {
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56 /* joystick ID */
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57 UINT id;
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58
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59 /* values used to translate device-specific coordinates into
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60 SDL-standard ranges */
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61 struct _transaxis
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62 {
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63 int offset;
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64 float scale;
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65 } transaxis[6];
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66 };
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67
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68 /* Convert a win32 Multimedia API return code to a text message */
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69 static void SetMMerror(char *function, int code);
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70
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71
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72 static char *
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73 GetJoystickName(int index, const char *szRegKey)
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74 {
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75 /* added 7/24/2004 by Eckhard Stolberg */
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76 /*
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77 see if there is a joystick for the current
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78 index (1-16) listed in the registry
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79 */
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80 char *name = NULL;
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81 HKEY hTopKey;
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82 HKEY hKey;
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83 DWORD regsize;
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84 LONG regresult;
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85 char regkey[256];
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86 char regvalue[256];
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87 char regname[256];
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88
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89 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s\\%s",
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90 REGSTR_PATH_JOYCONFIG, szRegKey, REGSTR_KEY_JOYCURR);
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91 hTopKey = HKEY_LOCAL_MACHINE;
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92 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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93 if (regresult != ERROR_SUCCESS) {
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94 hTopKey = HKEY_CURRENT_USER;
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95 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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96 }
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97 if (regresult != ERROR_SUCCESS) {
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98 return NULL;
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99 }
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100
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101 /* find the registry key name for the joystick's properties */
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102 regsize = sizeof(regname);
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103 SDL_snprintf(regvalue, SDL_arraysize(regvalue), "Joystick%d%s", index + 1,
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104 REGSTR_VAL_JOYOEMNAME);
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105 regresult =
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106 RegQueryValueExA(hKey, regvalue, 0, 0, (LPBYTE) regname, &regsize);
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107 RegCloseKey(hKey);
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108
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109 if (regresult != ERROR_SUCCESS) {
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110 return NULL;
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111 }
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112
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113 /* open that registry key */
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114 SDL_snprintf(regkey, SDL_arraysize(regkey), "%s\\%s", REGSTR_PATH_JOYOEM,
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115 regname);
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116 regresult = RegOpenKeyExA(hTopKey, regkey, 0, KEY_READ, &hKey);
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117 if (regresult != ERROR_SUCCESS) {
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118 return NULL;
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119 }
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120
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121 /* find the size for the OEM name text */
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122 regsize = sizeof(regvalue);
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123 regresult =
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124 RegQueryValueExA(hKey, REGSTR_VAL_JOYOEMNAME, 0, 0, NULL, &regsize);
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125 if (regresult == ERROR_SUCCESS) {
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126 /* allocate enough memory for the OEM name text ... */
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127 name = (char *) SDL_malloc(regsize);
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128 if (name) {
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129 /* ... and read it from the registry */
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130 regresult = RegQueryValueExA(hKey,
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131 REGSTR_VAL_JOYOEMNAME, 0, 0,
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132 (LPBYTE) name, &regsize);
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133 }
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134 }
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135 RegCloseKey(hKey);
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136
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137 return (name);
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138 }
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139
0
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140 /* Function to scan the system for joysticks.
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141 * This function should set SDL_numjoysticks to the number of available
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142 * joysticks. Joystick 0 should be the system default joystick.
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143 * It should return 0, or -1 on an unrecoverable fatal error.
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144 */
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145 int
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146 SDL_SYS_JoystickInit(void)
0
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147 {
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148 int i;
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149 int maxdevs;
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150 int numdevs;
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151 JOYINFOEX joyinfo;
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152 JOYCAPS joycaps;
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153 MMRESULT result;
0
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154
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155 /* Reset the joystick ID & name mapping tables */
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156 for (i = 0; i < MAX_JOYSTICKS; ++i) {
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157 SYS_JoystickID[i] = 0;
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158 SYS_JoystickName[i] = NULL;
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159 }
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160
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161 /* Loop over all potential joystick devices */
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162 numdevs = 0;
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163 maxdevs = joyGetNumDevs();
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164 for (i = JOYSTICKID1; i < maxdevs && numdevs < MAX_JOYSTICKS; ++i) {
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165
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166 joyinfo.dwSize = sizeof(joyinfo);
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167 joyinfo.dwFlags = JOY_RETURNALL;
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168 result = joyGetPosEx(i, &joyinfo);
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169 if (result == JOYERR_NOERROR) {
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170 result = joyGetDevCaps(i, &joycaps, sizeof(joycaps));
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171 if (result == JOYERR_NOERROR) {
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172 SYS_JoystickID[numdevs] = i;
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173 SYS_Joystick[numdevs] = joycaps;
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174 SYS_JoystickName[numdevs] =
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175 GetJoystickName(i, joycaps.szRegKey);
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176 numdevs++;
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177 }
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178 }
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179 }
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180 return (numdevs);
0
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181 }
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182
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183 /* Function to get the device-dependent name of a joystick */
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184 const char *
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185 SDL_SYS_JoystickName(int index)
0
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186 {
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187 if (SYS_JoystickName[index] != NULL) {
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188 return (SYS_JoystickName[index]);
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189 } else {
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190 return (SYS_Joystick[index].szPname);
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191 }
0
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192 }
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193
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194 /* Function to open a joystick for use.
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195 The joystick to open is specified by the index field of the joystick.
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196 This should fill the nbuttons and naxes fields of the joystick structure.
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197 It returns 0, or -1 if there is an error.
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198 */
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199 int
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200 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
0
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201 {
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202 int index, i;
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203 int caps_flags[MAX_AXES - 2] =
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204 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV };
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205 int axis_min[MAX_AXES], axis_max[MAX_AXES];
0
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206
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207
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208 /* shortcut */
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209 index = joystick->index;
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210 axis_min[0] = SYS_Joystick[index].wXmin;
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211 axis_max[0] = SYS_Joystick[index].wXmax;
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212 axis_min[1] = SYS_Joystick[index].wYmin;
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213 axis_max[1] = SYS_Joystick[index].wYmax;
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214 axis_min[2] = SYS_Joystick[index].wZmin;
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215 axis_max[2] = SYS_Joystick[index].wZmax;
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216 axis_min[3] = SYS_Joystick[index].wRmin;
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217 axis_max[3] = SYS_Joystick[index].wRmax;
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218 axis_min[4] = SYS_Joystick[index].wUmin;
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219 axis_max[4] = SYS_Joystick[index].wUmax;
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220 axis_min[5] = SYS_Joystick[index].wVmin;
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221 axis_max[5] = SYS_Joystick[index].wVmax;
0
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222
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223 /* allocate memory for system specific hardware data */
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224 joystick->hwdata =
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225 (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata));
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226 if (joystick->hwdata == NULL) {
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227 SDL_OutOfMemory();
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228 return (-1);
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229 }
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230 SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
0
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231
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232 /* set hardware data */
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233 joystick->hwdata->id = SYS_JoystickID[index];
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234 for (i = 0; i < MAX_AXES; ++i) {
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235 if ((i < 2) || (SYS_Joystick[index].wCaps & caps_flags[i - 2])) {
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236 joystick->hwdata->transaxis[i].offset = AXIS_MIN - axis_min[i];
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237 joystick->hwdata->transaxis[i].scale =
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238 (float) (AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]);
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239 } else {
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240 joystick->hwdata->transaxis[i].offset = 0;
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241 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */
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242 }
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243 }
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244
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245 /* fill nbuttons, naxes, and nhats fields */
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246 joystick->nbuttons = SYS_Joystick[index].wNumButtons;
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247 joystick->naxes = SYS_Joystick[index].wNumAxes;
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248 if (SYS_Joystick[index].wCaps & JOYCAPS_HASPOV) {
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249 joystick->nhats = 1;
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250 } else {
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251 joystick->nhats = 0;
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252 }
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253 return (0);
0
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254 }
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255
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256 static Uint8
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257 TranslatePOV(DWORD value)
0
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258 {
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259 Uint8 pos;
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260
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261 pos = SDL_HAT_CENTERED;
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262 if (value != JOY_POVCENTERED) {
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263 if ((value > JOY_POVLEFT) || (value < JOY_POVRIGHT)) {
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264 pos |= SDL_HAT_UP;
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265 }
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266 if ((value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD)) {
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267 pos |= SDL_HAT_RIGHT;
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268 }
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269 if ((value > JOY_POVRIGHT) && (value < JOY_POVLEFT)) {
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270 pos |= SDL_HAT_DOWN;
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271 }
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272 if (value > JOY_POVBACKWARD) {
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273 pos |= SDL_HAT_LEFT;
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274 }
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275 }
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276 return (pos);
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277 }
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278
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279 /* Function to update the state of a joystick - called as a device poll.
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280 * This function shouldn't update the joystick structure directly,
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281 * but instead should call SDL_PrivateJoystick*() to deliver events
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282 * and update joystick device state.
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283 */
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284 void
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285 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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286 {
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287 MMRESULT result;
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288 int i;
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289 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ,
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290 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV
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291 };
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292 DWORD pos[MAX_AXES];
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293 struct _transaxis *transaxis;
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294 int value, change;
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295 JOYINFOEX joyinfo;
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296
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297 joyinfo.dwSize = sizeof(joyinfo);
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298 joyinfo.dwFlags = JOY_RETURNALL | JOY_RETURNPOVCTS;
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299 if (!joystick->hats) {
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300 joyinfo.dwFlags &= ~(JOY_RETURNPOV | JOY_RETURNPOVCTS);
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301 }
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302 result = joyGetPosEx(joystick->hwdata->id, &joyinfo);
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303 if (result != JOYERR_NOERROR) {
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304 SetMMerror("joyGetPosEx", result);
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305 return;
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306 }
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307
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308 /* joystick motion events */
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309 pos[0] = joyinfo.dwXpos;
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310 pos[1] = joyinfo.dwYpos;
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311 pos[2] = joyinfo.dwZpos;
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312 pos[3] = joyinfo.dwRpos;
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313 pos[4] = joyinfo.dwUpos;
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314 pos[5] = joyinfo.dwVpos;
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315
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316 transaxis = joystick->hwdata->transaxis;
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317 for (i = 0; i < joystick->naxes; i++) {
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318 if (joyinfo.dwFlags & flags[i]) {
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319 value =
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320 (int) (((float) pos[i] +
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321 transaxis[i].offset) * transaxis[i].scale);
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322 change = (value - joystick->axes[i]);
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323 if ((change < -JOY_AXIS_THRESHOLD)
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324 || (change > JOY_AXIS_THRESHOLD)) {
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325 SDL_PrivateJoystickAxis(joystick, (Uint8) i, (Sint16) value);
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326 }
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327 }
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328 }
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329
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330 /* joystick button events */
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331 if (joyinfo.dwFlags & JOY_RETURNBUTTONS) {
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332 for (i = 0; i < joystick->nbuttons; ++i) {
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333 if (joyinfo.dwButtons & JOY_BUTTON_FLAG(i)) {
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334 if (!joystick->buttons[i]) {
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335 SDL_PrivateJoystickButton(joystick, (Uint8) i,
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336 SDL_PRESSED);
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337 }
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338 } else {
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339 if (joystick->buttons[i]) {
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340 SDL_PrivateJoystickButton(joystick, (Uint8) i,
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341 SDL_RELEASED);
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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
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347 /* joystick hat events */
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348 if (joyinfo.dwFlags & JOY_RETURNPOV) {
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349 Uint8 pos;
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350
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351 pos = TranslatePOV(joyinfo.dwPOV);
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352 if (pos != joystick->hats[0]) {
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353 SDL_PrivateJoystickHat(joystick, 0, pos);
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354 }
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355 }
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356 }
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357
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358 /* Function to close a joystick after use */
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359 void
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360 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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361 {
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362 if (joystick->hwdata != NULL) {
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363 /* free system specific hardware data */
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364 SDL_free(joystick->hwdata);
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365 }
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366 }
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367
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368 /* Function to perform any system-specific joystick related cleanup */
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369 void
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370 SDL_SYS_JoystickQuit(void)
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371 {
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372 int i;
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373 for (i = 0; i < MAX_JOYSTICKS; i++) {
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374 if (SYS_JoystickName[i] != NULL) {
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375 SDL_free(SYS_JoystickName[i]);
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376 }
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377 }
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378 }
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379
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380
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381 /* implementation functions */
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382 void
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383 SetMMerror(char *function, int code)
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384 {
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385 static char *error;
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386 static char errbuf[1024];
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387
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
388 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
389 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
390 case MMSYSERR_NODRIVER:
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 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
392 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
393
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 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
395 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
396 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
397 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
398
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 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
400 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
401 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402
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
403 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
404 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
405 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406
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
407 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
408 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
409 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410
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
411 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
412 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
413 "%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
414 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
415 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
416 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417
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
418 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
419 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
420 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
421 }
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 SDL_SetError("%s", errbuf);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 }
1635
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
424
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
425 #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
426 /* vi: set ts=4 sw=4 expandtab: */