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annotate libmlk-core/core/sys.c @ 301:f04b4ee04db3

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make: switch to GNU make
author David Demelier <markand@malikania.fr>
date Wed, 23 Jun 2021 22:41:34 +0200
parents 196264679079
children 363024b76da7
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23
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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
301
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19 #include "config.h"
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20
32
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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 # include <windows.h>
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29 #else
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30 # include <sys/stat.h>
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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 "error.h"
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41 #include "sound.h"
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42 #include "sys.h"
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43
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44 static struct {
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45 char organization[128];
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46 char name[128];
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47 } info = {
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48 .organization = "fr.malikania",
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49 .name = "molko"
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50 };
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51
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52 static const char *paths[] = {
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53 [SYS_DIR_BIN] = MOLKO_BINDIR,
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54 [SYS_DIR_DATA] = MOLKO_DATADIR,
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55 [SYS_DIR_LOCALE] = MOLKO_LOCALEDIR
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56 };
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57
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58 static const char *abspaths[] = {
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59 [SYS_DIR_BIN] = MOLKO_ABS_BINDIR,
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60 [SYS_DIR_DATA] = MOLKO_ABS_DATADIR,
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61 [SYS_DIR_LOCALE] = MOLKO_ABS_LOCALEDIR
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62 };
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63
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64 #if defined(_WIN32)
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65
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66 static inline int
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67 is_absolute(const char *path)
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68 {
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69 return !PathIsRelativeA(path);
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70 }
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71
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72 #else
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73
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74 static inline int
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75 is_absolute(const char *path)
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76 {
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77 return path[0] == '/';
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78 }
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79
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80 #endif
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81
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82 static inline char *
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83 normalize(char *str)
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84 {
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85 for (char *p = str; *p; ++p)
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86 if (*p == '\\')
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87 *p = '/';
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88
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89 return str;
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90 }
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91
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92 static inline const char *
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93 absolute(const char *which)
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94 {
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95 static char path[PATH_MAX];
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96
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97 strlcpy(path, which, sizeof (path));
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98
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99 return normalize(path);
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100 }
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101
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102 static const char *
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103 system_directory(enum sys_dir kind)
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104 {
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105 static char path[PATH_MAX];
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106 static char ret[PATH_MAX];
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107 char *base, *binsect;
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108
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109 /* 1. Get current binary directory. */
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110 base = SDL_GetBasePath();
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111
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112 /*
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113 * 2. Decompose the path to the given special directory by computing
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114 * relative directory to it from where the binary is located.
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115 *
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116 * Example:
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117 * PREFIX/bin/mlk
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118 * PREFIX/share/molko
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119 *
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120 * The path to the data is ../share/molko starting from the binary.
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121 *
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122 * If path to binary is absolute we can't determine relative paths to
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123 * any other directory and use the absolute one instead.
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124 *
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125 * Also, on some platforms SDL_GetBasePath isn't implemented and returns
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126 * NULL, in that case return the fallback to the installation prefix.
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127 */
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128 if (is_absolute(paths[SYS_DIR_BIN]) || is_absolute(paths[kind]) || !base)
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129 return absolute(abspaths[kind]);
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130
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131 /*
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132 * 3. Put the base path into the path and remove the value of
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133 * MOLKO_BINDIR.
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134 *
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135 * Example:
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136 * from: /usr/local/bin
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137 * to: /usr/local
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138 */
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139 strlcpy(path, base, sizeof (path));
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140 SDL_free(base);
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141
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142 if ((binsect = strstr(path, paths[SYS_DIR_BIN])))
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143 *binsect = '\0';
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144
259
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145 snprintf(ret, sizeof (ret), "%s%s", path, paths[kind]);
32
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146
241
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147 return normalize(ret);
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148 }
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149
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150 static const char *
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151 user_directory(enum sys_dir kind)
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152 {
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153 /* Kept for future use. */
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154 (void)kind;
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155
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156 static char path[PATH_MAX];
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157 char *pref;
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158
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159 if ((pref = SDL_GetPrefPath(info.organization, info.name))) {
258
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160 strlcpy(path, pref, sizeof (path));
241
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161 SDL_free(pref);
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162 } else
258
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163 strlcpy(path, "./", sizeof (path));
241
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164
279
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165 return path;
32
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166 }
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167
298
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168 static inline int
255
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169 mkpath(const char *path)
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170 {
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171 #ifdef _WIN32
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172 /* TODO: add error using the convenient FormatMessage function. */
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173 if (!CreateDirectoryA(path, NULL) && GetLastError() != ERROR_ALREADY_EXISTS)
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174 return errorf("unable to create directory: %s", path);
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175 #else
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176 if (mkdir(path, 0755) < 0 && errno != EEXIST)
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177 return errorf("%s", strerror(errno));
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178 #endif
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179
298
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180 return 0;
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181 }
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182
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183 int
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184 sys_init(const char *organization, const char *name)
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185 {
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186 #if defined(__MINGW64__)
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187 /* On MinGW buffering leads to painful debugging. */
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188 setbuf(stderr, NULL);
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189 setbuf(stdout, NULL);
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190 #endif
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191
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192 strlcpy(info.organization, organization, sizeof (info.organization));
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193 strlcpy(info.name, name, sizeof (info.name));
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194
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195 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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196 return errorf("%s", SDL_GetError());
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197 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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198 return errorf("%s", SDL_GetError());
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199 if (TTF_Init() < 0)
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200 return errorf("%s", SDL_GetError());
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201 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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202 return errorf("%s", SDL_GetError());
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203 if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
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204 return errorf("%s", SDL_GetError());
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205
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206 Mix_AllocateChannels(SOUND_CHANNELS_MAX);
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207
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208 return 0;
255
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209 }
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210
32
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211 const char *
241
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212 sys_dir(enum sys_dir kind)
32
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213 {
241
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diff changeset
214 switch (kind) {
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215 case SYS_DIR_BIN:
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216 case SYS_DIR_DATA:
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217 case SYS_DIR_LOCALE:
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218 return system_directory(kind);
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219 default:
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220 return user_directory(kind);
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221 }
84
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222 }
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223
298
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diff changeset
224 int
255
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225 sys_mkdir(const char *directory)
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226 {
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227 char path[PATH_MAX], *p;
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228
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229 /* Copy the directory to normalize and iterate over '/'. */
258
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230 strlcpy(path, directory, sizeof (path));
255
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diff changeset
231 normalize(path);
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232
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diff changeset
233 #if defined(_WIN32)
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234 /* Remove drive letter that we don't need. */
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235 if ((p = strchr(path, ':')))
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diff changeset
236 ++p;
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diff changeset
237 else
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238 p = path;
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diff changeset
239 #else
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240 p = path;
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241 #endif
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242
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diff changeset
243 for (p = p + 1; *p; ++p) {
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diff changeset
244 if (*p == '/') {
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diff changeset
245 *p = 0;
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246
298
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diff changeset
247 if (mkpath(path) < 0)
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diff changeset
248 return -1;
255
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249
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diff changeset
250 *p = '/';
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251 }
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252 }
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253
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254 return mkpath(path);
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255 }
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diff changeset
256
23
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parents:
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257 void
97
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diff changeset
258 sys_finish(void)
23
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259 {
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260 Mix_Quit();
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261 TTF_Quit();
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262 IMG_Quit();
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263 SDL_Quit();
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parents:
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264 }