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0
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* This is the system specific header for the SDL joystick API */
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29
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30 #include <stdio.h> /* For the definition of NULL */
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31 #include <stdlib.h> /* For getenv() prototype */
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32 #include <string.h>
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33 #include <sys/stat.h>
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34 #include <unistd.h>
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35 #include <fcntl.h>
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36 #include <sys/ioctl.h>
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37 #include <limits.h> /* For the definition of PATH_MAX */
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38
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39 #include <linux/joystick.h>
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40 #ifdef USE_INPUT_EVENTS
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41 #include <linux/input.h>
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42 #endif
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43
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44 #include "SDL_error.h"
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45 #include "SDL_joystick.h"
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46 #include "SDL_sysjoystick.h"
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47 #include "SDL_joystick_c.h"
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48
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49 /* Define this if you want to map axes to hats and trackballs */
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50 #define FANCY_HATS_AND_BALLS
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51
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52 #ifdef FANCY_HATS_AND_BALLS
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53 /* Special joystick configurations:
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54 'JoystickName' Naxes Nhats Nballs
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55 */
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56 static const char *special_joysticks[] = {
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57 "'MadCatz Panther XL' 3 2 1", /* We don't handle a rudder (axis 8) */
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58 "'SideWinder Precision Pro' 4 1 0",
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59 "'SideWinder 3D Pro' 4 1 0",
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60 "'Microsoft SideWinder 3D Pro' 4 1 0",
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61 "'Microsoft SideWinder Dual Strike USB version 1.0' 2 1 0",
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62 "'WingMan Interceptor' 3 3 0",
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63 /* WingMan Extreme Analog - not recognized by default
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64 "'Analog 3-axis 4-button joystick' 2 1",
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65 */
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66 "'WingMan Extreme Digital 3D' 4 1 0",
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67 NULL
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68 };
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69 #else
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70 #undef USE_INPUT_EVENTS
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71 #endif
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72
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73 /* The maximum number of joysticks we'll detect */
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74 #define MAX_JOYSTICKS 32
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75
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76 /* A list of available joysticks */
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77 static char *SDL_joylist[MAX_JOYSTICKS];
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78
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79 /* The private structure used to keep track of a joystick */
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80 struct joystick_hwdata {
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81 int fd;
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82 /* The current linux joystick driver maps hats to two axes */
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83 int analog_hat; /* Well, except for analog hats */
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84 struct hwdata_hat {
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85 int axis[2];
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86 } *hats;
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87 /* The current linux joystick driver maps balls to two axes */
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88 struct hwdata_ball {
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89 int axis[2];
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90 } *balls;
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91
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92 /* Support for the Linux 2.4 unified input interface */
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93 SDL_bool is_hid;
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94 #ifdef USE_INPUT_EVENTS
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95 Uint8 key_map[KEY_MAX-BTN_MISC];
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96 Uint8 abs_map[ABS_MAX];
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97 struct axis_correct {
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98 int used;
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99 int coef[3];
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100 } abs_correct[ABS_MAX];
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101 #endif
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102 };
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103
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104 static char *mystrdup(const char *string)
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105 {
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106 char *newstring;
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107
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108 newstring = (char *)malloc(strlen(string)+1);
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109 if ( newstring ) {
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110 strcpy(newstring, string);
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111 }
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112 return(newstring);
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113 }
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114
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115 #ifdef USE_INPUT_EVENTS
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116 #define test_bit(nr, addr) \
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117 (((1UL << ((nr) & 31)) & (((const unsigned int *) addr)[(nr) >> 5])) != 0)
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118
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119 static int EV_IsJoystick(int fd)
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120 {
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121 unsigned long evbit[40];
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122 unsigned long keybit[40];
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123 unsigned long absbit[40];
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124
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125 if ( (ioctl(fd, EVIOCGBIT(0, sizeof(evbit)), evbit) < 0) ||
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126 (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
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127 (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0) ) {
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128 return(0);
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129 }
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130 if (!(test_bit(EV_KEY, evbit) && test_bit(EV_ABS, evbit) &&
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131 test_bit(ABS_X, absbit) && test_bit(ABS_Y, absbit) &&
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132 (test_bit(BTN_TRIGGER, keybit) || test_bit(BTN_A, keybit) || test_bit(BTN_1, keybit)))) return 0;
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133 return(1);
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134 }
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135
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136 #endif /* USE_INPUT_EVENTS */
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137
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138 /* Function to scan the system for joysticks */
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139 int SDL_SYS_JoystickInit(void)
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140 {
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141 /* The base path of the joystick devices */
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142 const char *joydev_pattern[2] = {
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143 "/dev/js%d",
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144 #ifdef USE_INPUT_EVENTS
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145 "/dev/input/event%d"
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146 #else
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147 "/dev/input/js%d"
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148 #endif
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149 };
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150 int numjoysticks;
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151 int i, j, done;
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152 int fd;
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153 char path[PATH_MAX];
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154 dev_t dev_nums[MAX_JOYSTICKS]; /* major/minor device numbers */
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155 struct stat sb;
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156 int n, duplicate;
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157
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158 numjoysticks = 0;
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159
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160 /* First see if the user specified a joystick to use */
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161 if ( getenv("SDL_JOYSTICK_DEVICE") != NULL ) {
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162 strncpy(path, getenv("SDL_JOYSTICK_DEVICE"), sizeof(path));
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163 path[sizeof(path)-1] = '\0';
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164 if ( stat(path, &sb) == 0 ) {
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165 fd = open(path, O_RDONLY, 0);
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166 if ( fd >= 0 ) {
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167 /* Assume the user knows what they're doing. */
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168 SDL_joylist[numjoysticks] = mystrdup(path);
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169 if ( SDL_joylist[numjoysticks] ) {
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170 dev_nums[numjoysticks] = sb.st_rdev;
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171 ++numjoysticks;
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172 }
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173 close(fd);
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174 }
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175 }
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176 }
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177 for ( i=0; i<SDL_TABLESIZE(joydev_pattern); ++i ) {
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178 done = 0;
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179 for ( j=0; (j < MAX_JOYSTICKS) && !done; ++j ) {
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180 sprintf(path, joydev_pattern[i], j);
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181
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182 /* rcg06302000 replaced access(F_OK) call with stat().
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183 * stat() will fail if the file doesn't exist, so it's
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184 * equivalent behaviour.
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185 */
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186 if ( stat(path, &sb) == 0 ) {
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187 /* Check to make sure it's not already in list.
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188 * This happens when we see a stick via symlink.
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189 */
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190 duplicate = 0;
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191 for (n=0; (n<numjoysticks) && !duplicate; ++n) {
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192 if ( sb.st_rdev == dev_nums[n] ) {
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193 duplicate = 1;
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194 }
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195 }
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196 if (duplicate) {
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197 continue;
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198 }
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199
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200 fd = open(path, O_RDONLY, 0);
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201 if ( fd < 0 ) {
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202 continue;
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203 }
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204 #ifdef USE_INPUT_EVENTS
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205 #ifdef DEBUG_INPUT_EVENTS
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206 printf("Checking %s\n", path);
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207 #endif
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208 if ( (i > 0) && ! EV_IsJoystick(fd) ) {
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209 close(fd);
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210 continue;
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211 }
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212 #endif
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213 close(fd);
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214
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215 /* We're fine, add this joystick */
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216 SDL_joylist[numjoysticks] = mystrdup(path);
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217 if ( SDL_joylist[numjoysticks] ) {
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218 dev_nums[numjoysticks] = sb.st_rdev;
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219 ++numjoysticks;
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220 }
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221 } else {
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222 done = 1;
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223 }
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224 }
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225 }
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226 return(numjoysticks);
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227 }
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228
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229 /* Function to get the device-dependent name of a joystick */
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230 const char *SDL_SYS_JoystickName(int index)
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231 {
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232 int fd;
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233 static char namebuf[128];
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234 char *name;
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235
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236 name = NULL;
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237 fd = open(SDL_joylist[index], O_RDONLY, 0);
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238 if ( fd >= 0 ) {
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239 if (
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240 #ifdef USE_INPUT_EVENTS
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241 (ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) <= 0) &&
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242 #endif
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243 (ioctl(fd, JSIOCGNAME(sizeof(namebuf)), namebuf) <= 0) ) {
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244 name = SDL_joylist[index];
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245 } else {
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246 name = namebuf;
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247 }
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248 close(fd);
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249 }
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250 return name;
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251 }
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252
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253 #ifdef FANCY_HATS_AND_BALLS
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254
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255 static int allocate_hatdata(SDL_Joystick *joystick)
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256 {
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257 int i;
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258
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259 joystick->hwdata->hats = (struct hwdata_hat *)malloc(
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260 joystick->nhats * sizeof(struct hwdata_hat));
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261 if ( joystick->hwdata->hats == NULL ) {
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262 return(-1);
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263 }
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264 for ( i=0; i<joystick->nhats; ++i ) {
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265 joystick->hwdata->hats[i].axis[0] = 1;
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266 joystick->hwdata->hats[i].axis[1] = 1;
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267 }
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268 return(0);
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269 }
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270
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271 static int allocate_balldata(SDL_Joystick *joystick)
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272 {
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273 int i;
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274
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275 joystick->hwdata->balls = (struct hwdata_ball *)malloc(
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276 joystick->nballs * sizeof(struct hwdata_ball));
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277 if ( joystick->hwdata->balls == NULL ) {
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278 return(-1);
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279 }
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280 for ( i=0; i<joystick->nballs; ++i ) {
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281 joystick->hwdata->balls[i].axis[0] = 0;
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282 joystick->hwdata->balls[i].axis[1] = 0;
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283 }
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284 return(0);
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285 }
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286
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287 static SDL_bool ConfigJoystick(SDL_Joystick *joystick,
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288 const char *name, const char *config)
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289 {
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290 char cfg_name[128];
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291 SDL_bool handled;
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292
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293 if ( config == NULL ) {
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294 return(SDL_FALSE);
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295 }
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296 strcpy(cfg_name, "");
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297 if ( *config == '\'' ) {
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298 sscanf(config, "'%[^']s'", cfg_name);
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299 config += strlen(cfg_name)+2;
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300 } else {
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301 sscanf(config, "%s", cfg_name);
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302 config += strlen(cfg_name);
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303 }
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304 handled = SDL_FALSE;
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305 if ( strcmp(cfg_name, name) == 0 ) {
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306 /* Get the number of axes, hats and balls for this joystick */
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307 int joystick_axes = joystick->naxes;
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308 sscanf(config, "%d %d %d",
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309 &joystick->naxes, &joystick->nhats, &joystick->nballs);
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310
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311 /* Allocate the extra data for mapping them */
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312 if ( joystick->nhats > 0 ) {
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313 /* HACK: Analog hats map to only one axis */
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314 if (joystick_axes == (joystick->naxes+joystick->nhats)){
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315 joystick->hwdata->analog_hat = 1;
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316 } else {
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317 if ( allocate_hatdata(joystick) < 0 ) {
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318 joystick->nhats = 0;
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319 }
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320 joystick->hwdata->analog_hat = 0;
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321 }
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322 }
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323 if ( joystick->nballs > 0 ) {
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324 if ( allocate_balldata(joystick) < 0 ) {
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325 joystick->nballs = 0;
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326 }
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327 }
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328 handled = SDL_TRUE;
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329 }
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330 return(handled);
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331 }
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332
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333 #ifdef USE_INPUT_EVENTS
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334
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335 static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd)
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336 {
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337 int i;
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338 unsigned long keybit[40];
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339 unsigned long absbit[40];
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340 unsigned long relbit[40];
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341
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342 /* See if this device uses the new unified event API */
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343 if ( (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) >= 0) &&
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344 (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) >= 0) &&
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345 (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(relbit)), relbit) >= 0) ) {
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346 joystick->hwdata->is_hid = SDL_TRUE;
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347
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348 /* Get the number of buttons, axes, and other thingamajigs */
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349 for ( i=BTN_JOYSTICK; i < KEY_MAX; ++i ) {
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350 if ( test_bit(i, keybit) ) {
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351 #ifdef DEBUG_INPUT_EVENTS
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352 printf("Joystick has button: 0x%x\n", i);
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353 #endif
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354 joystick->hwdata->key_map[i-BTN_MISC] =
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355 joystick->nbuttons;
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356 ++joystick->nbuttons;
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357 }
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358 }
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359 for ( i=BTN_MISC; i < BTN_JOYSTICK; ++i ) {
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360 if ( test_bit(i, keybit) ) {
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361 #ifdef DEBUG_INPUT_EVENTS
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362 printf("Joystick has button: 0x%x\n", i);
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363 #endif
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364 joystick->hwdata->key_map[i-BTN_MISC] =
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365 joystick->nbuttons;
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366 ++joystick->nbuttons;
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367 }
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368 }
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369 for ( i=0; i<ABS_MAX; ++i ) {
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370 /* Skip hats */
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371 if ( i == ABS_HAT0X ) {
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372 i = ABS_HAT3Y;
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373 continue;
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374 }
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375 if ( test_bit(i, absbit) ) {
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376 int values[5];
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377
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378 ioctl(fd, EVIOCGABS(i), values);
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379 #ifdef DEBUG_INPUT_EVENTS
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380 printf("Joystick has absolute axis: %x\n", i);
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381 printf("Values = { %d, %d, %d, %d, %d }\n",
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382 values[0], values[1],
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383 values[2], values[3], values[4]);
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384 #endif /* DEBUG_INPUT_EVENTS */
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385 joystick->hwdata->abs_map[i] = joystick->naxes;
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386 if ( values[1] == values[2] ) {
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387 joystick->hwdata->abs_correct[i].used = 0;
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388 } else {
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389 joystick->hwdata->abs_correct[i].used = 1;
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390 joystick->hwdata->abs_correct[i].coef[0] =
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391 (values[2] + values[1]) / 2 - values[4];
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392 joystick->hwdata->abs_correct[i].coef[1] =
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393 (values[2] + values[1]) / 2 + values[4];
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394 joystick->hwdata->abs_correct[i].coef[2] =
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395 (1 << 29) / ((values[2] - values[1]) / 2 - 2 * values[4]);
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396 }
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397 ++joystick->naxes;
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398 }
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399 }
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400 for ( i=ABS_HAT0X; i <= ABS_HAT3Y; i += 2 ) {
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401 if ( test_bit(i, absbit) || test_bit(i+1, absbit) ) {
|
|
|
402 #ifdef DEBUG_INPUT_EVENTS
|
|
|
403 printf("Joystick has hat %d\n",(i-ABS_HAT0X)/2);
|
|
|
404 #endif
|
|
|
405 ++joystick->nhats;
|
|
|
406 }
|
|
|
407 }
|
|
|
408 if ( test_bit(REL_X, relbit) || test_bit(REL_Y, relbit) ) {
|
|
|
409 ++joystick->nballs;
|
|
|
410 }
|
|
|
411
|
|
|
412 /* Allocate data to keep track of these thingamajigs */
|
|
|
413 if ( joystick->nhats > 0 ) {
|
|
|
414 if ( allocate_hatdata(joystick) < 0 ) {
|
|
|
415 joystick->nhats = 0;
|
|
|
416 }
|
|
|
417 }
|
|
|
418 if ( joystick->nballs > 0 ) {
|
|
|
419 if ( allocate_balldata(joystick) < 0 ) {
|
|
|
420 joystick->nballs = 0;
|
|
|
421 }
|
|
|
422 }
|
|
|
423 }
|
|
|
424 return(joystick->hwdata->is_hid);
|
|
|
425 }
|
|
|
426
|
|
|
427 #endif /* USE_INPUT_EVENTS */
|
|
|
428
|
|
|
429 #endif /* FANCY_HATS_AND_BALLS */
|
|
|
430
|
|
|
431 /* Function to open a joystick for use.
|
|
|
432 The joystick to open is specified by the index field of the joystick.
|
|
|
433 This should fill the nbuttons and naxes fields of the joystick structure.
|
|
|
434 It returns 0, or -1 if there is an error.
|
|
|
435 */
|
|
|
436 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
|
|
|
437 {
|
|
|
438 #ifdef FANCY_HATS_AND_BALLS
|
|
|
439 const char *name;
|
|
|
440 int i;
|
|
|
441 #endif
|
|
|
442 int fd;
|
|
|
443 unsigned char n;
|
|
|
444
|
|
|
445 /* Open the joystick and set the joystick file descriptor */
|
|
|
446 fd = open(SDL_joylist[joystick->index], O_RDONLY, 0);
|
|
|
447 if ( fd < 0 ) {
|
|
|
448 SDL_SetError("Unable to open %s\n",
|
|
|
449 SDL_joylist[joystick->index]);
|
|
|
450 return(-1);
|
|
|
451 }
|
|
|
452 joystick->hwdata = (struct joystick_hwdata *)
|
|
|
453 malloc(sizeof(*joystick->hwdata));
|
|
|
454 if ( joystick->hwdata == NULL ) {
|
|
|
455 SDL_OutOfMemory();
|
|
|
456 close(fd);
|
|
|
457 return(-1);
|
|
|
458 }
|
|
|
459 memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
|
|
|
460 joystick->hwdata->fd = fd;
|
|
|
461
|
|
|
462 /* Set the joystick to non-blocking read mode */
|
|
|
463 fcntl(fd, F_SETFL, O_NONBLOCK);
|
|
|
464
|
|
|
465 /* Get the number of buttons and axes on the joystick */
|
|
|
466 #ifdef USE_INPUT_EVENTS
|
|
|
467 if ( ! EV_ConfigJoystick(joystick, fd) )
|
|
|
468 #endif
|
|
|
469 {
|
|
|
470 if ( ioctl(fd, JSIOCGAXES, &n) < 0 ) {
|
|
|
471 joystick->naxes = 2;
|
|
|
472 } else {
|
|
|
473 joystick->naxes = n;
|
|
|
474 }
|
|
|
475 if ( ioctl(fd, JSIOCGBUTTONS, &n) < 0 ) {
|
|
|
476 joystick->nbuttons = 2;
|
|
|
477 } else {
|
|
|
478 joystick->nbuttons = n;
|
|
|
479 }
|
|
|
480 #ifdef FANCY_HATS_AND_BALLS
|
|
|
481 /* Check for special joystick support */
|
|
|
482 name = SDL_SYS_JoystickName(joystick->index);
|
|
|
483 for ( i=0; special_joysticks[i]; ++i ) {
|
|
|
484 if (ConfigJoystick(joystick,name,special_joysticks[i])){
|
|
|
485 break;
|
|
|
486 }
|
|
|
487 }
|
|
|
488 if ( special_joysticks[i] == NULL ) {
|
|
|
489 ConfigJoystick(joystick, name,
|
|
|
490 getenv("SDL_LINUX_JOYSTICK"));
|
|
|
491 }
|
|
|
492 #endif /* FANCY_HATS_AND_BALLS */
|
|
|
493 }
|
|
|
494 return(0);
|
|
|
495 }
|
|
|
496
|
|
|
497 static __inline__
|
|
|
498 void HandleHat(SDL_Joystick *stick, Uint8 hat, int axis, int value)
|
|
|
499 {
|
|
|
500 struct hwdata_hat *the_hat;
|
|
|
501 const Uint8 position_map[3][3] = {
|
|
|
502 { SDL_HAT_LEFTUP, SDL_HAT_UP, SDL_HAT_RIGHTUP },
|
|
|
503 { SDL_HAT_LEFT, SDL_HAT_CENTERED, SDL_HAT_RIGHT },
|
|
|
504 { SDL_HAT_LEFTDOWN, SDL_HAT_DOWN, SDL_HAT_RIGHTDOWN }
|
|
|
505 };
|
|
|
506
|
|
|
507 the_hat = &stick->hwdata->hats[hat];
|
|
|
508 if ( value < 0 ) {
|
|
|
509 value = 0;
|
|
|
510 } else
|
|
|
511 if ( value == 0 ) {
|
|
|
512 value = 1;
|
|
|
513 } else
|
|
|
514 if ( value > 0 ) {
|
|
|
515 value = 2;
|
|
|
516 }
|
|
|
517 if ( value != the_hat->axis[axis] ) {
|
|
|
518 the_hat->axis[axis] = value;
|
|
|
519 SDL_PrivateJoystickHat(stick, hat,
|
|
|
520 position_map[the_hat->axis[1]][the_hat->axis[0]]);
|
|
|
521 }
|
|
|
522 }
|
|
|
523
|
|
|
524 /* This was necessary for the Wingman Extreme Analog joystick */
|
|
|
525 static __inline__
|
|
|
526 void HandleAnalogHat(SDL_Joystick *stick, Uint8 hat, int value)
|
|
|
527 {
|
|
|
528 const Uint8 position_map[] = {
|
|
|
529 SDL_HAT_UP,
|
|
|
530 SDL_HAT_RIGHT,
|
|
|
531 SDL_HAT_DOWN,
|
|
|
532 SDL_HAT_LEFT,
|
|
|
533 SDL_HAT_CENTERED
|
|
|
534 };
|
|
|
535 SDL_PrivateJoystickHat(stick, hat, position_map[(value/16000)+2]);
|
|
|
536 }
|
|
|
537
|
|
|
538 static __inline__
|
|
|
539 void HandleBall(SDL_Joystick *stick, Uint8 ball, int axis, int value)
|
|
|
540 {
|
|
|
541 stick->hwdata->balls[ball].axis[axis] += value;
|
|
|
542 }
|
|
|
543
|
|
|
544 /* Function to update the state of a joystick - called as a device poll.
|
|
|
545 * This function shouldn't update the joystick structure directly,
|
|
|
546 * but instead should call SDL_PrivateJoystick*() to deliver events
|
|
|
547 * and update joystick device state.
|
|
|
548 */
|
|
|
549 static __inline__ void JS_HandleEvents(SDL_Joystick *joystick)
|
|
|
550 {
|
|
|
551 struct js_event events[32];
|
|
|
552 int i, len;
|
|
|
553 Uint8 other_axis;
|
|
|
554
|
|
|
555 while ((len=read(joystick->hwdata->fd, events, (sizeof events))) > 0) {
|
|
|
556 len /= sizeof(events[0]);
|
|
|
557 for ( i=0; i<len; ++i ) {
|
|
|
558 switch (events[i].type & ~JS_EVENT_INIT) {
|
|
|
559 case JS_EVENT_AXIS:
|
|
|
560 if ( events[i].number < joystick->naxes ) {
|
|
|
561 SDL_PrivateJoystickAxis(joystick,
|
|
|
562 events[i].number, events[i].value);
|
|
|
563 break;
|
|
|
564 }
|
|
|
565 events[i].number -= joystick->naxes;
|
|
|
566 if ( joystick->hwdata->analog_hat ) {
|
|
|
567 other_axis = events[i].number;
|
|
|
568 if ( other_axis < joystick->nhats ) {
|
|
|
569 HandleAnalogHat(joystick, other_axis,
|
|
|
570 events[i].value);
|
|
|
571 break;
|
|
|
572 }
|
|
|
573 } else {
|
|
|
574 other_axis = (events[i].number / 2);
|
|
|
575 if ( other_axis < joystick->nhats ) {
|
|
|
576 HandleHat(joystick, other_axis,
|
|
|
577 events[i].number%2,
|
|
|
578 events[i].value);
|
|
|
579 break;
|
|
|
580 }
|
|
|
581 }
|
|
|
582 events[i].number -= joystick->nhats*2;
|
|
|
583 other_axis = (events[i].number / 2);
|
|
|
584 if ( other_axis < joystick->nballs ) {
|
|
|
585 HandleBall(joystick, other_axis,
|
|
|
586 events[i].number%2,
|
|
|
587 events[i].value);
|
|
|
588 break;
|
|
|
589 }
|
|
|
590 break;
|
|
|
591 case JS_EVENT_BUTTON:
|
|
|
592 SDL_PrivateJoystickButton(joystick,
|
|
|
593 events[i].number, events[i].value);
|
|
|
594 break;
|
|
|
595 default:
|
|
|
596 /* ?? */
|
|
|
597 break;
|
|
|
598 }
|
|
|
599 }
|
|
|
600 }
|
|
|
601 }
|
|
|
602 #ifdef USE_INPUT_EVENTS
|
|
|
603 static __inline__ int EV_AxisCorrect(SDL_Joystick *joystick, int which, int value)
|
|
|
604 {
|
|
|
605 struct axis_correct *correct;
|
|
|
606
|
|
|
607 correct = &joystick->hwdata->abs_correct[which];
|
|
|
608 if ( correct->used ) {
|
|
|
609 if ( value > correct->coef[0] ) {
|
|
|
610 if ( value < correct->coef[1] ) {
|
|
|
611 return 0;
|
|
|
612 }
|
|
|
613 value -= correct->coef[1];
|
|
|
614 } else {
|
|
|
615 value -= correct->coef[0];
|
|
|
616 }
|
|
|
617 value *= correct->coef[2];
|
|
|
618 value >>= 14;
|
|
|
619 }
|
|
|
620 /* Clamp and return */
|
|
|
621 if ( value < -32767 ) {
|
|
|
622 value = -32767;
|
|
|
623 } else
|
|
|
624 if ( value > 32767 ) {
|
|
|
625 value = 32767;
|
|
|
626 }
|
|
|
627 return value;
|
|
|
628 }
|
|
|
629
|
|
|
630 static __inline__ void EV_HandleEvents(SDL_Joystick *joystick)
|
|
|
631 {
|
|
|
632 struct input_event events[32];
|
|
|
633 int i, len;
|
|
|
634 int code;
|
|
|
635
|
|
|
636 while ((len=read(joystick->hwdata->fd, events, (sizeof events))) > 0) {
|
|
|
637 len /= sizeof(events[0]);
|
|
|
638 for ( i=0; i<len; ++i ) {
|
|
|
639 code = events[i].code;
|
|
|
640 switch (events[i].type) {
|
|
|
641 case EV_KEY:
|
|
|
642 if ( code >= BTN_MISC ) {
|
|
|
643 code -= BTN_MISC;
|
|
|
644 SDL_PrivateJoystickButton(joystick,
|
|
|
645 joystick->hwdata->key_map[code],
|
|
|
646 events[i].value);
|
|
|
647 }
|
|
|
648 break;
|
|
|
649 case EV_ABS:
|
|
|
650 switch (code) {
|
|
|
651 case ABS_HAT0X:
|
|
|
652 case ABS_HAT0Y:
|
|
|
653 case ABS_HAT1X:
|
|
|
654 case ABS_HAT1Y:
|
|
|
655 case ABS_HAT2X:
|
|
|
656 case ABS_HAT2Y:
|
|
|
657 case ABS_HAT3X:
|
|
|
658 case ABS_HAT3Y:
|
|
|
659 code -= ABS_HAT0X;
|
|
|
660 HandleHat(joystick, code/2, code%2,
|
|
|
661 events[i].value);
|
|
|
662 break;
|
|
|
663 default:
|
|
|
664 events[i].value = EV_AxisCorrect(joystick, code, events[i].value);
|
|
|
665 SDL_PrivateJoystickAxis(joystick,
|
|
|
666 joystick->hwdata->abs_map[code],
|
|
|
667 events[i].value);
|
|
|
668 break;
|
|
|
669 }
|
|
|
670 break;
|
|
|
671 case EV_REL:
|
|
|
672 switch (code) {
|
|
|
673 case REL_X:
|
|
|
674 case REL_Y:
|
|
|
675 code -= REL_X;
|
|
|
676 HandleBall(joystick, code/2, code%2,
|
|
|
677 events[i].value);
|
|
|
678 break;
|
|
|
679 default:
|
|
|
680 break;
|
|
|
681 }
|
|
|
682 break;
|
|
|
683 default:
|
|
|
684 break;
|
|
|
685 }
|
|
|
686 }
|
|
|
687 }
|
|
|
688 }
|
|
|
689 #endif /* USE_INPUT_EVENTS */
|
|
|
690
|
|
|
691 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
|
|
|
692 {
|
|
|
693 int i;
|
|
|
694
|
|
|
695 #ifdef USE_INPUT_EVENTS
|
|
|
696 if ( joystick->hwdata->is_hid )
|
|
|
697 EV_HandleEvents(joystick);
|
|
|
698 else
|
|
|
699 #endif
|
|
|
700 JS_HandleEvents(joystick);
|
|
|
701
|
|
|
702 /* Deliver ball motion updates */
|
|
|
703 for ( i=0; i<joystick->nballs; ++i ) {
|
|
|
704 int xrel, yrel;
|
|
|
705
|
|
|
706 xrel = joystick->hwdata->balls[i].axis[0];
|
|
|
707 yrel = joystick->hwdata->balls[i].axis[1];
|
|
|
708 if ( xrel || yrel ) {
|
|
|
709 joystick->hwdata->balls[i].axis[0] = 0;
|
|
|
710 joystick->hwdata->balls[i].axis[1] = 0;
|
|
|
711 SDL_PrivateJoystickBall(joystick, (Uint8)i, xrel, yrel);
|
|
|
712 }
|
|
|
713 }
|
|
|
714 }
|
|
|
715
|
|
|
716 /* Function to close a joystick after use */
|
|
|
717 void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
|
|
|
718 {
|
|
|
719 if ( joystick->hwdata ) {
|
|
|
720 close(joystick->hwdata->fd);
|
|
|
721 if ( joystick->hwdata->hats ) {
|
|
|
722 free(joystick->hwdata->hats);
|
|
|
723 }
|
|
|
724 if ( joystick->hwdata->balls ) {
|
|
|
725 free(joystick->hwdata->balls);
|
|
|
726 }
|
|
|
727 free(joystick->hwdata);
|
|
|
728 joystick->hwdata = NULL;
|
|
|
729 }
|
|
|
730 }
|
|
|
731
|
|
|
732 /* Function to perform any system-specific joystick related cleanup */
|
|
|
733 void SDL_SYS_JoystickQuit(void)
|
|
|
734 {
|
|
|
735 int i;
|
|
|
736
|
|
|
737 for ( i=0; SDL_joylist[i]; ++i ) {
|
|
|
738 free(SDL_joylist[i]);
|
|
|
739 }
|
|
|
740 SDL_joylist[0] = NULL;
|
|
|
741 }
|
|
|
742
|
