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annotate src/power/macosx/SDL_syspower.c @ 4495:dbbfdb9ea716

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Simplified clipboard API for sanity's sake. A complete clipboard implementation would support multiple formats that could be queried at runtime, events for when the clipboard contents changed, support for HTML, images, etc. We're not going that crazy, at least for now. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 07 Jul 2010 23:54:03 -0700
parents f7b03b6838cb
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifndef SDL_POWER_DISABLED
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25 #ifdef SDL_POWER_MACOSX
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26
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27 #include <Carbon/Carbon.h>
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28 #include <IOKit/ps/IOPowerSources.h>
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29 #include <IOKit/ps/IOPSKeys.h>
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30
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31 #include "SDL_power.h"
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32
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33 /* Carbon is so verbose... */
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34 #define STRMATCH(a,b) (CFStringCompare(a, b, 0) == kCFCompareEqualTo)
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35 #define GETVAL(k,v) \
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36 CFDictionaryGetValueIfPresent(dict, CFSTR(k), (const void **) v)
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37
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38 /* Note that AC power sources also include a laptop battery it is charging. */
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39 static void
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40 checkps(CFDictionaryRef dict, SDL_bool * have_ac, SDL_bool * have_battery,
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41 SDL_bool * charging, int *seconds, int *percent)
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42 {
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43 CFStringRef strval; /* don't CFRelease() this. */
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44 CFBooleanRef bval;
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45 CFNumberRef numval;
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46 SDL_bool charge = SDL_FALSE;
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47 SDL_bool choose = SDL_FALSE;
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48 SDL_bool is_ac = SDL_FALSE;
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49 int secs = -1;
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50 int maxpct = -1;
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51 int pct = -1;
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52
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53 if ((GETVAL(kIOPSIsPresentKey, &bval)) && (bval == kCFBooleanFalse)) {
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54 return; /* nothing to see here. */
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55 }
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56
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57 if (!GETVAL(kIOPSPowerSourceStateKey, &strval)) {
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58 return;
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59 }
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60
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61 if (STRMATCH(strval, CFSTR(kIOPSACPowerValue))) {
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62 is_ac = *have_ac = SDL_TRUE;
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63 } else if (!STRMATCH(strval, CFSTR(kIOPSBatteryPowerValue))) {
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64 return; /* not a battery? */
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65 }
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66
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67 if ((GETVAL(kIOPSIsChargingKey, &bval)) && (bval == kCFBooleanTrue)) {
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68 charge = SDL_TRUE;
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69 }
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70
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71 if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
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72 SInt32 val = -1;
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73 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
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74 if (val > 0) {
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75 *have_battery = SDL_TRUE;
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76 maxpct = (int) val;
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77 }
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78 }
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79
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80 if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
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81 SInt32 val = -1;
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82 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
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83 if (val > 0) {
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84 *have_battery = SDL_TRUE;
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85 maxpct = (int) val;
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86 }
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87 }
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88
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89 if (GETVAL(kIOPSTimeToEmptyKey, &numval)) {
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90 SInt32 val = -1;
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91 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
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92
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93 /* Mac OS X reports 0 minutes until empty if you're plugged in. :( */
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94 if ((val == 0) && (is_ac)) {
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95 val = -1; /* !!! FIXME: calc from timeToFull and capacity? */
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96 }
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97
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98 secs = (int) val;
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99 if (secs > 0) {
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100 secs *= 60; /* value is in minutes, so convert to seconds. */
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101 }
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102 }
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103
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104 if (GETVAL(kIOPSCurrentCapacityKey, &numval)) {
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105 SInt32 val = -1;
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106 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
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107 pct = (int) val;
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108 }
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109
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110 if ((pct > 0) && (maxpct > 0)) {
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111 pct = (int) ((((double) pct) / ((double) maxpct)) * 100.0);
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112 }
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113
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114 if (pct > 100) {
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115 pct = 100;
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116 }
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117
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118 /*
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119 * We pick the battery that claims to have the most minutes left.
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120 * (failing a report of minutes, we'll take the highest percent.)
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121 */
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122 if ((secs < 0) && (*seconds < 0)) {
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123 if ((pct < 0) && (*percent < 0)) {
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124 choose = SDL_TRUE; /* at least we know there's a battery. */
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125 }
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126 if (pct > *percent) {
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127 choose = SDL_TRUE;
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128 }
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129 } else if (secs > *seconds) {
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130 choose = SDL_TRUE;
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131 }
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132
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133 if (choose) {
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134 *seconds = secs;
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135 *percent = pct;
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136 *charging = charge;
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137 }
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138 }
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139
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140 #undef GETVAL
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141 #undef STRMATCH
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142
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143
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144 SDL_bool
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145 SDL_GetPowerInfo_MacOSX(SDL_PowerState * state, int *seconds, int *percent)
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146 {
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147 CFTypeRef blob = IOPSCopyPowerSourcesInfo();
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148
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149 *seconds = -1;
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150 *percent = -1;
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151 *state = SDL_POWERSTATE_UNKNOWN;
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152
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153 if (blob != NULL) {
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154 CFArrayRef list = IOPSCopyPowerSourcesList(blob);
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155 if (list != NULL) {
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156 /* don't CFRelease() the list items, or dictionaries! */
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157 SDL_bool have_ac = SDL_FALSE;
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158 SDL_bool have_battery = SDL_FALSE;
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159 SDL_bool charging = SDL_FALSE;
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160 const CFIndex total = CFArrayGetCount(list);
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161 CFIndex i;
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162 for (i = 0; i < total; i++) {
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163 CFTypeRef ps = (CFTypeRef) CFArrayGetValueAtIndex(list, i);
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164 CFDictionaryRef dict =
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165 IOPSGetPowerSourceDescription(blob, ps);
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166 if (dict != NULL) {
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167 checkps(dict, &have_ac, &have_battery, &charging,
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168 seconds, percent);
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169 }
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170 }
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171
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172 if (!have_battery) {
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173 *state = SDL_POWERSTATE_NO_BATTERY;
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174 } else if (charging) {
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175 *state = SDL_POWERSTATE_CHARGING;
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176 } else if (have_ac) {
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177 *state = SDL_POWERSTATE_CHARGED;
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178 } else {
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179 *state = SDL_POWERSTATE_ON_BATTERY;
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180 }
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181
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182 CFRelease(list);
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183 }
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184 CFRelease(blob);
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185 }
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186
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187 return SDL_TRUE; /* always the definitive answer on Mac OS X. */
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188 }
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189
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190 #endif /* SDL_POWER_MACOSX */
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191 #endif /* SDL_POWER_DISABLED */
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192
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193 /* vi: set ts=4 sw=4 expandtab: */