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annotate src/video/x11/SDL_x11dyn.c @ 2349:0381047f2210 gsoc2008_iphone

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The class SDL_uikitappdelegate acts as the UIApplicationDelegate for an iPhone SDL project. This class is reponsible for application control flow, including initial setup of working directory, forwarding command line arguments to the user's main function, and handling application termination.
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Thu, 17 Jul 2008 22:29:37 +0000
parents c7bcf84ba1b9
children 6fc50bdd88c0
rev   line source
1950
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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@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 #define DEBUG_DYNAMIC_X11 0
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25
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26 #include "SDL_x11dyn.h"
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27
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28 #if DEBUG_DYNAMIC_X11
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29 #include <stdio.h>
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30 #endif
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31
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32 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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33
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34 #include "SDL_name.h"
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35 #include "SDL_loadso.h"
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36
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37 typedef struct
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38 {
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39 void *lib;
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40 const char *libname;
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41 } x11dynlib;
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42
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43 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC
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44 #define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL
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45 #endif
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46 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
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47 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
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48 #endif
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49 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER
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50 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER NULL
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51 #endif
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52 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
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53 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
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54 #endif
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55
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56 static x11dynlib x11libs[] = {
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57 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC},
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58 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT},
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59 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER},
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60 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR},
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61 };
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62
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63 static void
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64 X11_GetSym(const char *fnname, int *rc, void **fn)
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65 {
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66 int i;
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67 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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68 if (x11libs[i].lib != NULL) {
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69 *fn = SDL_LoadFunction(x11libs[i].lib, fnname);
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70 if (*fn != NULL)
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71 break;
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72 }
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73 }
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74
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75 #if DEBUG_DYNAMIC_X11
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76 if (*fn != NULL)
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77 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname,
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78 *fn);
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79 else
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80 printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
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81 #endif
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82
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83 if (*fn == NULL)
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84 *rc = 0; /* kill this module. */
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85 }
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86
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87
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88 /* Define all the function pointers and wrappers... */
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89 #define SDL_X11_MODULE(modname)
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90 #define SDL_X11_SYM(rc,fn,params,args,ret) \
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91 static rc (*p##fn) params = NULL; \
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92 rc fn params { ret p##fn args ; }
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93 #include "SDL_x11sym.h"
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94 #undef SDL_X11_MODULE
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95 #undef SDL_X11_SYM
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96 #endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */
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97
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98 /* Annoying varargs entry point... */
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99 #ifdef X_HAVE_UTF8_STRING
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100 XIC(*pXCreateIC) (XIM,...) = NULL;
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101 char *(*pXGetICValues) (XIC, ...) = NULL;
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102 #endif
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103
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104 /* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
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105 #define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1;
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106 #define SDL_X11_SYM(rc,fn,params,args,ret)
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107 #include "SDL_x11sym.h"
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108 #undef SDL_X11_MODULE
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109 #undef SDL_X11_SYM
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110
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111
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112 static int x11_load_refcount = 0;
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113
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114 void
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115 SDL_X11_UnloadSymbols(void)
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116 {
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117 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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118 /* Don't actually unload if more than one module is using the libs... */
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119 if (x11_load_refcount > 0) {
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120 if (--x11_load_refcount == 0) {
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121 int i;
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122
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123 /* set all the function pointers to NULL. */
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124 #define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1;
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125 #define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL;
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126 #include "SDL_x11sym.h"
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127 #undef SDL_X11_MODULE
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128 #undef SDL_X11_SYM
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129
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130 #ifdef X_HAVE_UTF8_STRING
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131 pXCreateIC = NULL;
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132 pXGetICValues = NULL;
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133 #endif
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134
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135 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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136 if (x11libs[i].lib != NULL) {
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137 SDL_UnloadObject(x11libs[i].lib);
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138 x11libs[i].lib = NULL;
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139 }
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140 }
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141 }
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142 }
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143 #endif
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144 }
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145
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146 /* returns non-zero if all needed symbols were loaded. */
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147 int
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148 SDL_X11_LoadSymbols(void)
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149 {
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150 int rc = 1; /* always succeed if not using Dynamic X11 stuff. */
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151
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152 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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153 /* deal with multiple modules (dga, x11, etc) needing these symbols... */
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154 if (x11_load_refcount++ == 0) {
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155 int i;
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156 int *thismod = NULL;
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157 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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158 if (x11libs[i].libname != NULL) {
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159 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
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160 }
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161 }
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162 #define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
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163 #define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn);
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164 #include "SDL_x11sym.h"
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165 #undef SDL_X11_MODULE
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166 #undef SDL_X11_SYM
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167
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168 #ifdef X_HAVE_UTF8_STRING
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169 X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8, (void **) &pXCreateIC);
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170 X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8,
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171 (void **) &pXGetICValues);
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172 #endif
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173
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174 if (SDL_X11_HAVE_BASEXLIB) {
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175 /* all required symbols loaded. */
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176 SDL_ClearError();
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177 } else {
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178 /* in case something got loaded... */
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179 SDL_X11_UnloadSymbols();
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180 rc = 0;
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181 }
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182 }
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183 #else
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184 #ifdef X_HAVE_UTF8_STRING
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185 pXCreateIC = XCreateIC;
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186 pXGetICValues = XGetICValues;
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187 #endif
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188 #endif
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189
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190 return rc;
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191 }
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192
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193 /* vi: set ts=4 sw=4 expandtab: */