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annotate libcore/core/sys.c @ 241:76afe639fd72

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misc: add support for NLS, closes #22510 @4h While here cleanup the path functions in sys.c/sys.h
author David Demelier <markand@malikania.fr>
date Sat, 28 Nov 2020 18:00:05 +0100
parents c9fbb822d269
children
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1 /*
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2 * sys.c -- system routines
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
241
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19 #include "sysconfig.h"
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20
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21 #include <assert.h>
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22 #include <stdio.h>
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23 #include <stdlib.h>
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24 #include <limits.h>
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25
241
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26 #if defined(_WIN32)
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27 # include <shlwapi.h>
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28 #endif
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29
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30 #include <SDL.h>
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31 #include <SDL_image.h>
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32 #include <SDL_mixer.h>
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33 #include <SDL_ttf.h>
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34
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35 #include "error.h"
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36 #include "sound.h"
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37 #include "sys.h"
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38
241
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39 static struct {
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40 char organization[128];
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41 char name[128];
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42 } info = {
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43 .organization = "fr.malikania",
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44 .name = "molko"
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45 };
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46
241
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47 static const char *paths[] = {
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48 [SYS_DIR_BIN] = MOLKO_BINDIR,
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49 [SYS_DIR_DATA] = MOLKO_DATADIR,
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50 [SYS_DIR_LOCALE] = MOLKO_LOCALEDIR
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51 };
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52
241
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53 static const char *abspaths[] = {
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54 [SYS_DIR_BIN] = MOLKO_ABS_BINDIR,
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55 [SYS_DIR_DATA] = MOLKO_ABS_DATADIR,
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56 [SYS_DIR_LOCALE] = MOLKO_ABS_LOCALEDIR
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57 };
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58
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59 #if defined(_WIN32)
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60
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61 static bool
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62 is_absolute(const char *path)
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63 {
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64 return !PathIsRelativeA(path);
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65 }
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66
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67 #else
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68
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69 static bool
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70 is_absolute(const char *path)
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71 {
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72 return path[0] == '/';
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73 }
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74
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75 #endif
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76
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77 static char *
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78 normalize(char *str)
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79 {
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80 for (char *p = str; *p; ++p)
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81 if (*p == '\\')
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82 *p = '/';
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83
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84 return str;
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85 }
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86
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87 bool
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88 sys_init(const char *organization, const char *name)
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89 {
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90 #if defined(__MINGW64__)
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91 /* On MinGW buffering leads to painful debugging. */
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92 setbuf(stderr, NULL);
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93 setbuf(stdout, NULL);
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94 #endif
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95
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96 snprintf(info.organization, sizeof (info.organization), "%s", organization);
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97 snprintf(info.name, sizeof (info.name), "%s", name);
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98
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99 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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100 return errorf("%s", SDL_GetError());
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101 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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102 return errorf("%s", SDL_GetError());
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103 if (TTF_Init() < 0)
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104 return errorf("%s", SDL_GetError());
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105 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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106 return errorf("%s", SDL_GetError());
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107 if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
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108 return errorf("%s", SDL_GetError());
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109
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110 Mix_AllocateChannels(SOUND_CHANNELS_MAX);
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111
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112 return true;
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113 }
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114
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115 static const char *
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116 absolute(const char *which)
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117 {
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118 static char path[PATH_MAX];
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119
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120 snprintf(path, sizeof (path), "%s", which);
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121
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122 return normalize(path);
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123 }
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124
241
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125 static const char *
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126 system_directory(enum sys_dir kind)
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127 {
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128 static char path[PATH_MAX];
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129 static char ret[PATH_MAX];
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130 char *base, *binsect;
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131
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132 /* 1. Get current binary directory. */
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133 base = SDL_GetBasePath();
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134
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135 /*
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136 * 2. Decompose the path to the given special directory by computing
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137 * relative directory to it from where the binary is located.
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138 *
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139 * Example:
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140 * PREFIX/bin/mlk
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141 * PREFIX/share/molko
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142 *
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143 * The path to the data is ../share/molko starting from the binary.
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144 *
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145 * If path to binary is absolute we can't determine relative paths to
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146 * any other directory and use the absolute one instead.
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147 *
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148 * Also, on some platforms SDL_GetBasePath isn't implemented and returns
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149 * NULL, in that case return the fallback to the installation prefix.
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150 */
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151 if (is_absolute(paths[SYS_DIR_BIN]) || is_absolute(paths[kind]) || !base)
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152 return absolute(abspaths[kind]);
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153
241
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154 /*
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155 * 3. Put the base path into the path and remove the value of
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156 * MOLKO_BINDIR.
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157 *
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158 * Example:
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159 * from: /usr/local/bin
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160 * to: /usr/local
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161 */
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162 snprintf(path, sizeof (path), "%s", base);
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163 SDL_free(base);
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164
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165 if ((binsect = strstr(path, paths[SYS_DIR_BIN])))
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166 *binsect = '\0';
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167
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168 /* 4. For data directories, we append the program name. */
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169 if (kind == SYS_DIR_DATA)
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170 snprintf(ret, sizeof (ret), "%s%s/%s", path, paths[kind], info.name);
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171 else
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172 snprintf(ret, sizeof (ret), "%s%s", path, paths[kind]);
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173
241
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174 return normalize(ret);
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175 }
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176
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177 static const char *
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178 user_directory(enum sys_dir kind)
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179 {
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180 /* Kept for future use. */
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181 (void)kind;
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182
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183 static char path[PATH_MAX];
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184 char *pref;
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185
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186 if ((pref = SDL_GetPrefPath(info.organization, info.name))) {
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187 snprintf(path, sizeof (path), "%s", pref);
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188 SDL_free(pref);
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189 } else
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190 snprintf(path, sizeof (path), "./");
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191
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192 return NULL;
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193 }
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194
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195 const char *
241
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196 sys_dir(enum sys_dir kind)
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197 {
241
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198 switch (kind) {
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199 case SYS_DIR_BIN:
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200 case SYS_DIR_DATA:
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201 case SYS_DIR_LOCALE:
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202 return system_directory(kind);
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203 default:
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204 return user_directory(kind);
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205 }
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206 }
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207
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208 void
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209 sys_finish(void)
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210 {
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211 Mix_Quit();
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212 TTF_Quit();
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213 IMG_Quit();
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214 SDL_Quit();
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215 }