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annotate src/joystick/amigaos/SDL_sysjoystick.c @ 1907:06c27a737b7a

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Streamlined the API a bit and optimized the software renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 15 Jul 2006 09:46:36 +0000
parents c121d94672cb
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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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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_AMIGA
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25
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26 /* This is the system specific header for the SDL joystick API */
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27
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28 #include <libraries/lowlevel.h>
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29 #if defined(__SASC) || defined(STORMC4_WOS)
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30 #include <proto/exec.h>
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31 #include <proto/lowlevel.h>
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32 #include <proto/graphics.h>
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33 #else
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34 #include <inline/exec.h>
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35 #include <inline/lowlevel.h>
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36 #include <inline/graphics.h>
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37 #endif
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38 #include "mydebug.h"
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39
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40 extern struct ExecBase *SysBase;
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41 extern struct GfxBase *GfxBase;
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42
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43 #include "SDL_joystick.h"
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44 #include "../SDL_sysjoystick.h"
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45 #include "../SDL_joystick_c.h"
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46
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47 /* Function to scan the system for joysticks.
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48 * This function should set SDL_numjoysticks to the number of available
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49 * joysticks. Joystick 0 should be the system default joystick.
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50 * It should return 0, or -1 on an unrecoverable fatal error.
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51 */
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52
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53
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54 /* Amiga specific datas */
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55 struct Library *LowLevelBase = NULL;
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56
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57 ULONG joybut[] = {
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58 JPF_BUTTON_RED,
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59 JPF_BUTTON_BLUE,
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60 JPF_BUTTON_PLAY,
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61 JPF_BUTTON_YELLOW,
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62 JPF_BUTTON_GREEN,
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63 JPF_BUTTON_FORWARD,
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64 JPF_BUTTON_REVERSE,
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65 };
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66
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67 struct joystick_hwdata
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68 {
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69 ULONG joystate;
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70 };
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71
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72 int
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73 SDL_SYS_JoystickInit(void)
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74 {
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75 if (!LowLevelBase) {
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76 if (LowLevelBase = OpenLibrary("lowlevel.library", 37))
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77 return 2;
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78 } else
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79 return 2;
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80
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81 D(bug("%ld joysticks available.\n", SDL_numjoysticks));
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82
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83 return 0;
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84 }
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85
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86 /* Function to get the device-dependent name of a joystick */
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87 const char *
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88 SDL_SYS_JoystickName(int index)
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89 {
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90 if (index < 2 && LowLevelBase) {
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91 switch (index) {
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92 case 0:
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93 return "Port 1 Amiga Joystick/Joypad";
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94 case 1:
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95 return "Port 2 Amiga Joystick/Joypad";
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96 }
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97 }
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98
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99 SDL_SetError("No joystick available with that index");
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100 return (NULL);
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101 }
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102
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103 /* Function to open a joystick for use.
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104 The joystick to open is specified by the index field of the joystick.
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105 This should fill the nbuttons and naxes fields of the joystick structure.
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106 It returns 0, or -1 if there is an error.
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107 */
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108
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109 int
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110 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
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111 {
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112 ULONG temp, i;
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113 D(bug("Opening joystick %ld\n", joystick->index));
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114
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115 if (!(joystick->hwdata = SDL_malloc(sizeof(struct joystick_hwdata))))
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116 return -1;
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117
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118 /* This loop is to check if the controller is a joypad */
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119
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120 for (i = 0; i < 20; i++) {
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121 temp = ReadJoyPort(joystick->index ^ 1); // fix to invert amiga joyports
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122 WaitTOF();
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123 }
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124
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125 if ((temp & JP_TYPE_MASK) == JP_TYPE_GAMECTLR)
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126 joystick->nbuttons = 7;
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127 else
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128 joystick->nbuttons = 3;
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129
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130 joystick->nhats = 0;
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131 joystick->nballs = 0;
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132 joystick->naxes = 2;
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133 joystick->hwdata->joystate = 0L;
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134
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135 return 0;
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136 }
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137
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138 /* Function to update the state of a joystick - called as a device poll.
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139 * This function shouldn't update the joystick structure directly,
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140 * but instead should call SDL_PrivateJoystick*() to deliver events
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141 * and update joystick device state.
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142 */
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143 void
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144 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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145 {
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146 ULONG data;
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147 int i;
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148
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149 if (joystick->index < 2) {
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150 data = ReadJoyPort(joystick->index);
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151
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152 if (data & JP_DIRECTION_MASK) {
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153 if (data & JPF_JOY_DOWN) {
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154 if (!(joystick->hwdata->joystate & JPF_JOY_DOWN))
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155 SDL_PrivateJoystickAxis(joystick, 0, 127);
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156 } else if (data & JPF_JOY_UP) {
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157 if (!(joystick->hwdata->joystate & JPF_JOY_UP))
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158 SDL_PrivateJoystickAxis(joystick, 0, -127);
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159 } else if (joystick->hwdata->
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160 joystate & (JPF_JOY_UP | JPF_JOY_DOWN))
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161 SDL_PrivateJoystickAxis(joystick, 0, 0);
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162
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163 if (data & JPF_JOY_LEFT) {
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164 if (!(joystick->hwdata->joystate & JPF_JOY_LEFT))
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165 SDL_PrivateJoystickAxis(joystick, 1, -127);
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166 } else if (data & JPF_JOY_RIGHT) {
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167 if (!(joystick->hwdata->joystate & JPF_JOY_RIGHT))
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168 SDL_PrivateJoystickAxis(joystick, 1, 127);
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169 } else if (joystick->hwdata->
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170 joystate & (JPF_JOY_LEFT | JPF_JOY_RIGHT))
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171 SDL_PrivateJoystickAxis(joystick, 1, 0);
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172 } else if (joystick->hwdata->
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173 joystate & (JPF_JOY_LEFT | JPF_JOY_RIGHT)) {
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174 SDL_PrivateJoystickAxis(joystick, 1, 0);
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175 } else if (joystick->hwdata->joystate & (JPF_JOY_UP | JPF_JOY_DOWN)) {
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176 SDL_PrivateJoystickAxis(joystick, 0, 0);
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177 }
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178
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179 for (i = 0; i < joystick->nbuttons; i++) {
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180 if ((data & joybut[i])) {
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181 if (i == 1)
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182 data &= (~(joybut[2]));
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183
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184 if (!(joystick->hwdata->joystate & joybut[i]))
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185 SDL_PrivateJoystickButton(joystick, i, SDL_PRESSED);
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186 } else if (joystick->hwdata->joystate & joybut[i])
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187 SDL_PrivateJoystickButton(joystick, i, SDL_RELEASED);
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188 }
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189
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190 joystick->hwdata->joystate = data;
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191 }
21
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192
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193 return;
21
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194 }
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195
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196 /* Function to close a joystick after use */
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197 void
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198 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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199 {
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200 if (joystick->hwdata)
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201 SDL_free(joystick->hwdata);
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202 return;
21
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203 }
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204
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205 /* Function to perform any system-specific joystick related cleanup */
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206
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207 void
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208 SDL_SYS_JoystickQuit(void)
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209 {
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210 if (LowLevelBase) {
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211 CloseLibrary(LowLevelBase);
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212 LowLevelBase = NULL;
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213 SDL_numjoysticks = 0;
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214 }
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215 return;
21
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216 }
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217
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218 #endif /* SDL_JOYSTICK_AMIGA */
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219 /* vi: set ts=4 sw=4 expandtab: */