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annotate src/libmlk-core/core/sys.c @ 369:1e06f871dc63

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core: split action and action_stack
author David Demelier <markand@malikania.fr>
date Sun, 24 Oct 2021 17:33:12 +0200
parents 74f9cb70fc5d
children 8ac282bd5935
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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) 2020-2021 David Demelier <markand@malikania.fr>
23
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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
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19 #include "config.h"
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20
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21 #include <sys/stat.h>
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22 #include <assert.h>
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23 #include <stdio.h>
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24 #include <stdlib.h>
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25 #include <limits.h>
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26
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27 #if defined(_WIN32)
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28 # include <shlwapi.h>
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29 # include <windows.h>
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30 #else
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31 # include <errno.h>
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32 # include <string.h>
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33 #endif
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34
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35 #include <SDL.h>
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36 #include <SDL_image.h>
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37 #include <SDL_mixer.h>
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38 #include <SDL_ttf.h>
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39
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40 #include <port/port.h>
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41
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42 #include "error.h"
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43 #include "sound.h"
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44 #include "sys.h"
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45
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46 static struct {
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47 char organization[128];
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48 char name[128];
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49 } info = {
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50 .organization = "fr.malikania",
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51 .name = "molko"
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52 };
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53
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54 static struct {
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55 char bindir[PATH_MAX];
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56 char datadir[PATH_MAX];
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57 char localedir[PATH_MAX];
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58 } paths;
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59
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60 static inline char *
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61 normalize(char *str)
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62 {
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63 for (char *p = str; *p; ++p)
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64 if (*p == '\\')
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65 *p = '/';
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66
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67 return str;
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68 }
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69
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70 static inline int
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71 absolute(const char *path)
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72 {
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73 #if defined(_WIN32)
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74 return !PathIsRelativeA(path);
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75 #else
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76 /* Assuming UNIX like. */
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77 if (path[0] == '/')
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78 return 1;
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79
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80 return 0;
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81 #endif
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82 }
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83
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84 static const char *
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85 system_directory(const char *whichdir)
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86 {
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87 static char path[PATH_MAX];
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88 static char ret[PATH_MAX];
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89 char *base, *binsect;
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90
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91 /*
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92 * Some system does not provide support (shame on you OpenBSD)
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93 * to the executable path. In that case we use PREFIX+<dir>
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94 * instead unless <dir> is already absolute.
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95 */
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96
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97 /*
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98 * If requested directory is absolute return immediately.
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99 *
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100 * e.g. whichdir == /usr/share -> return immediately
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101 * whichdir == bin -> will be computed
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102 */
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103 if (absolute(whichdir))
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104 return whichdir;
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105
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106 /*
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107 * If MLK_BINDIR is absolute then we're unable to compute whichdir which
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108 * now is mandatory relative. In that case return its whole path to the
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109 * prefix.
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110 */
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111 if (absolute(MLK_BINDIR) || !(base = SDL_GetBasePath()))
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112 snprintf(ret, sizeof (ret), "%s/%s", MLK_PREFIX, whichdir);
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113 else {
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114 /*
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115 * Decompose the path to the given special directory by
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116 * computing relative directory to it from where the
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117 * binary is located.
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118 *
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119 * Example:
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120 *
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121 * PREFIX/bin/<executable>
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122 * PREFIX/share/mysupergame
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123 *
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124 * The path to the data is ../share/mysupergame starting from
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125 * the binary.
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126 *
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127 * Put the base path into the path and remove the value
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128 * of MLK_BINDIR.
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129 *
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130 * Example:
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131 * from: /usr/local/bin
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132 * to: /usr/local
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133 */
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134 printf("base=%s\n", base);
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135 port_strlcpy(path, base, sizeof (path));
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136 SDL_free(base);
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137
366
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138 /* TODO: remove using negative offset. */
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139 if ((binsect = strstr(path, MLK_BINDIR)))
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140 *binsect = '\0';
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141
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142 snprintf(ret, sizeof (ret), "%s%s", path, whichdir);
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143 }
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144
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145 return normalize(ret);
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146 }
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147
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148 static const char *
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149 user_directory(enum sys_dir kind)
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150 {
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151 /* Kept for future use. */
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152 (void)kind;
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153
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154 static char path[PATH_MAX];
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155 char *pref;
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156
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157 if ((pref = SDL_GetPrefPath(info.organization, info.name))) {
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158 port_strlcpy(path, pref, sizeof (path));
241
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159 SDL_free(pref);
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160 } else
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161 port_strlcpy(path, "./", sizeof (path));
241
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162
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163 return path;
32
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164 }
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165
298
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166 static inline int
255
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167 mkpath(const char *path)
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168 {
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169 #ifdef _WIN32
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170 /* TODO: add error using the convenient FormatMessage function. */
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171 if (!CreateDirectoryA(path, NULL) && GetLastError() != ERROR_ALREADY_EXISTS)
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172 return errorf("unable to create directory: %s", path);
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173 #else
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174 if (mkdir(path, 0755) < 0 && errno != EEXIST)
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175 return errorf("%s", strerror(errno));
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176 #endif
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177
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178 return 0;
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179 }
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180
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181 int
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182 sys_init(const char *organization, const char *name)
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183 {
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184 #if defined(__MINGW64__)
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185 /* On MinGW buffering leads to painful debugging. */
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186 setbuf(stderr, NULL);
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187 setbuf(stdout, NULL);
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188 #endif
367
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189 port_strlcpy(paths.bindir, system_directory(MLK_BINDIR), sizeof (paths.bindir));
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190 port_strlcpy(paths.datadir, system_directory(MLK_DATADIR), sizeof (paths.datadir));
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191 port_strlcpy(paths.localedir, system_directory(MLK_LOCALEDIR), sizeof (paths.localedir));
298
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192
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193 port_strlcpy(info.organization, organization, sizeof (info.organization));
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194 port_strlcpy(info.name, name, sizeof (info.name));
298
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195
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196 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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197 return errorf("%s", SDL_GetError());
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198 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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199 return errorf("%s", SDL_GetError());
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200 if (TTF_Init() < 0)
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201 return errorf("%s", SDL_GetError());
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202 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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203 return errorf("%s", SDL_GetError());
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204 if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
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205 return errorf("%s", SDL_GetError());
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206
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207 Mix_AllocateChannels(SOUND_CHANNELS_MAX);
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208
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209 return 0;
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210 }
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211
32
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212 const char *
241
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213 sys_dir(enum sys_dir kind)
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214 {
241
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215 switch (kind) {
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216 case SYS_DIR_BIN:
320
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217 return paths.bindir;
241
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218 case SYS_DIR_DATA:
320
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219 return paths.datadir;
241
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220 case SYS_DIR_LOCALE:
320
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221 return paths.localedir;
241
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222 default:
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223 return user_directory(kind);
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224 }
84
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225 }
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226
298
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227 int
255
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228 sys_mkdir(const char *directory)
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229 {
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230 char path[PATH_MAX], *p;
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231
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232 /* Copy the directory to normalize and iterate over '/'. */
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233 port_strlcpy(path, directory, sizeof (path));
255
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234 normalize(path);
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235
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236 #if defined(_WIN32)
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237 /* Remove drive letter that we don't need. */
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238 if ((p = strchr(path, ':')))
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239 ++p;
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240 else
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241 p = path;
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242 #else
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243 p = path;
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244 #endif
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245
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246 for (p = p + 1; *p; ++p) {
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247 if (*p == '/') {
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248 *p = 0;
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249
298
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250 if (mkpath(path) < 0)
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251 return -1;
255
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252
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253 *p = '/';
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254 }
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255 }
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256
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257 return mkpath(path);
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258 }
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259
23
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260 void
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261 sys_finish(void)
23
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262 {
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263 Mix_Quit();
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264 TTF_Quit();
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265 IMG_Quit();
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266 SDL_Quit();
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267 }