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annotate src/SDL.c @ 3257:94fb40a4a9a7

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Merged Martin's code changes from Google Summer of Code 2009
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Sep 2009 04:51:29 +0000
parents 5db962a9a991
children a67a961e2171
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 /* Initialization code for SDL */
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25
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26 #include "SDL.h"
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27 #include "SDL_fatal.h"
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28 #if !SDL_VIDEO_DISABLED
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29 #include "video/SDL_leaks.h"
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30 #endif
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31
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32 #if SDL_THREAD_PTH
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33 #include <pth.h>
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34 #endif
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35
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36 /* Initialization/Cleanup routines */
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37 #if !SDL_JOYSTICK_DISABLED
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38 extern int SDL_JoystickInit(void);
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39 extern void SDL_JoystickQuit(void);
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40 #endif
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41 #if !SDL_HAPTIC_DISABLED
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42 extern int SDL_HapticInit(void);
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43 extern int SDL_HapticQuit(void);
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44 #endif
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45 #if !SDL_TIMERS_DISABLED
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46 extern void SDL_StartTicks(void);
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47 extern int SDL_TimerInit(void);
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48 extern void SDL_TimerQuit(void);
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49 #endif
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50 #if defined(__WIN32__)
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51 extern int SDL_HelperWindowCreate(void);
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52 extern int SDL_HelperWindowDestroy(void);
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53 #endif
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54
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55 /* The initialized subsystems */
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56 static Uint32 SDL_initialized = 0;
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57 static Uint32 ticks_started = 0;
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58
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59 #ifdef CHECK_LEAKS
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60 int surfaces_allocated = 0;
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61 #endif
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62
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63 int
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64 SDL_InitSubSystem(Uint32 flags)
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65 {
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66 #if !SDL_VIDEO_DISABLED
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67 /* Initialize the video/event subsystem */
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68 if ((flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO)) {
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69 if (SDL_VideoInit(NULL, (flags & SDL_INIT_EVENTTHREAD)) < 0) {
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70 return (-1);
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71 }
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72 SDL_initialized |= SDL_INIT_VIDEO;
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73 }
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74 #else
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75 if (flags & SDL_INIT_VIDEO) {
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76 SDL_SetError("SDL not built with video support");
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77 return (-1);
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78 }
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79 #endif
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80
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81 #if !SDL_AUDIO_DISABLED
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82 /* Initialize the audio subsystem */
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83 if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
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84 if (SDL_AudioInit(NULL) < 0) {
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85 return (-1);
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86 }
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87 SDL_initialized |= SDL_INIT_AUDIO;
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88 }
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89 #else
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90 if (flags & SDL_INIT_AUDIO) {
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91 SDL_SetError("SDL not built with audio support");
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92 return (-1);
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93 }
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94 #endif
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95
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96 #if !SDL_TIMERS_DISABLED
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97 /* Initialize the timer subsystem */
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98 if (!ticks_started) {
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99 SDL_StartTicks();
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100 ticks_started = 1;
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101 }
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102 if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
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103 if (SDL_TimerInit() < 0) {
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104 return (-1);
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105 }
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106 SDL_initialized |= SDL_INIT_TIMER;
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107 }
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108 #else
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109 if (flags & SDL_INIT_TIMER) {
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110 SDL_SetError("SDL not built with timer support");
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111 return (-1);
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112 }
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113 #endif
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114
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115 #if !SDL_JOYSTICK_DISABLED
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116 /* Initialize the joystick subsystem */
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117 if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
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118 if (SDL_JoystickInit() < 0) {
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119 return (-1);
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120 }
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121 SDL_initialized |= SDL_INIT_JOYSTICK;
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122 }
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123 #else
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124 if (flags & SDL_INIT_JOYSTICK) {
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125 SDL_SetError("SDL not built with joystick support");
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126 return (-1);
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127 }
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128 #endif
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129
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130 #if !SDL_HAPTIC_DISABLED
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131 /* Initialize the haptic subsystem */
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132 if ((flags & SDL_INIT_HAPTIC) && !(SDL_initialized & SDL_INIT_HAPTIC)) {
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133 if (SDL_HapticInit() < 0) {
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134 return (-1);
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135 }
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136 SDL_initialized |= SDL_INIT_HAPTIC;
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137 }
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138 #else
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139 if (flags & SDL_INIT_HAPTIC) {
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140 SDL_SetError("SDL not built with haptic (force feedback) support");
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141 return (-1);
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142 }
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143 #endif
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144 return (0);
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145 }
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146
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147 int
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148 SDL_Init(Uint32 flags)
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149 {
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150 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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151 if (!pth_init()) {
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152 return -1;
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153 }
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154 #endif
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155
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156 /* Clear the error message */
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157 SDL_ClearError();
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158
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159 #if defined(__WIN32__)
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160 if (SDL_HelperWindowCreate() < 0) {
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161 return -1;
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162 }
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163 #endif
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164
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165 /* Initialize the desired subsystems */
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166 if (SDL_InitSubSystem(flags) < 0) {
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167 return (-1);
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168 }
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169
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170 /* Everything is initialized */
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171 if (!(flags & SDL_INIT_NOPARACHUTE)) {
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172 SDL_InstallParachute();
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173 }
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174 return (0);
0
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175 }
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176
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177 void
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178 SDL_QuitSubSystem(Uint32 flags)
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179 {
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180 /* Shut down requested initialized subsystems */
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181 #if !SDL_JOYSTICK_DISABLED
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182 if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
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183 SDL_JoystickQuit();
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184 SDL_initialized &= ~SDL_INIT_JOYSTICK;
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185 }
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186 #endif
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187 #if !SDL_HAPTIC_DISABLED
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188 if ((flags & SDL_initialized & SDL_INIT_HAPTIC)) {
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189 SDL_HapticQuit();
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190 SDL_initialized &= ~SDL_INIT_HAPTIC;
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191 }
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192 #endif
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193 #if !SDL_TIMERS_DISABLED
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194 if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
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195 SDL_TimerQuit();
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196 SDL_initialized &= ~SDL_INIT_TIMER;
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197 }
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198 #endif
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199 #if !SDL_AUDIO_DISABLED
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200 if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
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201 SDL_AudioQuit();
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202 SDL_initialized &= ~SDL_INIT_AUDIO;
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203 }
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204 #endif
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205 #if !SDL_VIDEO_DISABLED
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206 if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
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207 SDL_VideoQuit();
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208 SDL_initialized &= ~SDL_INIT_VIDEO;
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209 }
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210 #endif
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211 }
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212
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213 Uint32
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214 SDL_WasInit(Uint32 flags)
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215 {
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216 if (!flags) {
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217 flags = SDL_INIT_EVERYTHING;
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218 }
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219 return (SDL_initialized & flags);
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220 }
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221
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222 void
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223 SDL_Quit(void)
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224 {
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225 /* Quit all subsystems */
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226 #ifdef DEBUG_BUILD
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227 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n");
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228 fflush(stdout);
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229 #endif
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230
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231 #if defined(__WIN32__)
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232 SDL_HelperWindowDestroy();
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233 #endif
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234 SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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235
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236 #ifdef CHECK_LEAKS
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237 #ifdef DEBUG_BUILD
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238 printf("[SDL_Quit] : CHECK_LEAKS\n");
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239 fflush(stdout);
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240 #endif
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241
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242 /* Print the number of surfaces not freed */
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243 if (surfaces_allocated != 0) {
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244 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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245 surfaces_allocated);
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246 }
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247 #endif
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248 #ifdef DEBUG_BUILD
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249 printf("[SDL_Quit] : SDL_UninstallParachute()\n");
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250 fflush(stdout);
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251 #endif
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252
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253 /* Uninstall any parachute signal handlers */
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254 SDL_UninstallParachute();
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diff changeset
255
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256 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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257 pth_kill();
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diff changeset
258 #endif
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259 #ifdef DEBUG_BUILD
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260 printf("[SDL_Quit] : Returning!\n");
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261 fflush(stdout);
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262 #endif
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263
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264 }
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265
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266 /* Get the library version number */
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267 void
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268 SDL_GetVersion(SDL_version * ver)
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269 {
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270 SDL_VERSION(ver);
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271 }
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272
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273 /* Get the library source revision */
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diff changeset
274 int
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275 SDL_GetRevision(void)
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276 {
2983
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277 return SDL_REVISION;
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278 }
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279
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280 #if defined(__OS2__)
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281 /* Building for OS/2 */
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282 #ifdef __WATCOMC__
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283
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284 #define INCL_DOSERRORS
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285 #define INCL_DOSEXCEPTIONS
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286 #include <os2.h>
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287
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288 /* Exception handler to prevent the Audio thread hanging, making a zombie process! */
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289 ULONG _System
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290 SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
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291 PEXCEPTIONREGISTRATIONRECORD pERegRec,
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292 PCONTEXTRECORD pCtxRec, PVOID p)
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293 {
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294 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND)
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295 return XCPT_CONTINUE_SEARCH;
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296 if (pERepRec->fHandlerFlags & EH_UNWINDING)
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297 return XCPT_CONTINUE_SEARCH;
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298 if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
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299 return XCPT_CONTINUE_SEARCH;
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300
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301 /* Do cleanup at every fatal exception! */
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302 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) ==
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303 XCPT_FATAL_EXCEPTION) && (pERepRec->ExceptionNum != XCPT_BREAKPOINT)
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304 && (pERepRec->ExceptionNum != XCPT_SINGLE_STEP)) {
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305 if (SDL_initialized & SDL_INIT_AUDIO) {
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306 /* This removes the zombie audio thread in case of emergency. */
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307 #ifdef DEBUG_BUILD
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308 printf
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309 ("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n");
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310 #endif
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311 SDL_CloseAudio();
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312 }
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313 }
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314 return (XCPT_CONTINUE_SEARCH);
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315 }
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316
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317
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318 EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand =
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319 { 0, SDL_Main_ExceptionHandler };
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320
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321 /* The main DLL entry for DLL Initialization and Uninitialization: */
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322 unsigned _System
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323 LibMain(unsigned hmod, unsigned termination)
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324 {
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325 if (termination) {
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326 #ifdef DEBUG_BUILD
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327 /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */
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328 #endif
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329 DosUnsetExceptionHandler(&SDL_Main_xcpthand);
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330 return 1;
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331 } else {
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332 #ifdef DEBUG_BUILD
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333 /* Make stdout and stderr unbuffered! */
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334 setbuf(stdout, NULL);
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335 setbuf(stderr, NULL);
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336 #endif
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337 /* Fire up exception handler */
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338 #ifdef DEBUG_BUILD
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339 /* printf("[SDL DLL Initialization] : Setting exception handler\n"); */
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340 #endif
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341 /* Set exception handler */
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342 DosSetExceptionHandler(&SDL_Main_xcpthand);
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343
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344 return 1;
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345 }
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346 }
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347 #endif /* __WATCOMC__ */
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348
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349 #elif defined(__WIN32__)
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350
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351 #if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
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352 /* Need to include DllMain() on Watcom C for some reason.. */
1433
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353 #define WIN32_LEAN_AND_MEAN
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354 #include <windows.h>
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355
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356 BOOL APIENTRY
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357 _DllMainCRTStartup(HANDLE hModule,
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358 DWORD ul_reason_for_call, LPVOID lpReserved)
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diff changeset
359 {
1895
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diff changeset
360 switch (ul_reason_for_call) {
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361 case DLL_PROCESS_ATTACH:
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diff changeset
362 case DLL_THREAD_ATTACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
363 case DLL_THREAD_DETACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
364 case DLL_PROCESS_DETACH:
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diff changeset
365 break;
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diff changeset
366 }
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367 return TRUE;
1330
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diff changeset
368 }
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diff changeset
369 #endif /* building DLL with Watcom C */
1330
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diff changeset
370
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diff changeset
371 #endif /* OS/2 elif __WIN32__ */
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diff changeset
372
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diff changeset
373 /* vi: set ts=4 sw=4 expandtab: */