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annotate libcore/core/sys.c @ 136:30b68089ae70

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core: rework actions and a bit of drawables, closes #2492 In the effort of having as less as possible memory allocation in libcore, the usage of actions and drawable no longer copy the original source parameter to let user pass a heap allocated variable or a static storage one. Update predefined drawable and actions to match these new needs.
author David Demelier <markand@malikania.fr>
date Tue, 13 Oct 2020 09:38:44 +0200
parents 789b23e01f52
children eb0a7ab71023
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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
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19 #include <assert.h>
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20 #include <stdio.h>
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21 #include <stdlib.h>
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22 #include <limits.h>
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23
23
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24 #include <SDL.h>
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25 #include <SDL_image.h>
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26 #include <SDL_mixer.h>
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27 #include <SDL_ttf.h>
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28
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29 #if !defined(_WIN32) /* Assuming POSIX */
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30 # include <sys/types.h>
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31 # include <dirent.h>
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32 #endif
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33
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34 #include "error.h"
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35 #include "error_p.h"
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36 #include "sys.h"
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37
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38 #if defined(_WIN32)
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39
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40 static void
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41 determine(char path[], size_t pathlen)
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42 {
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43 char *base = SDL_GetBasePath();
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44
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45 /* On Windows, the data hierarchy is the same as the project. */
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46 snprintf(path, pathlen, "%sassets", base);
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47 SDL_free(base);
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48 }
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49
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50 #else /* Assuming POSIX */
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51
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52 static bool
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53 is_absolute(const char *path)
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54 {
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55 assert(path);
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57 return path[0] == '/';
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58 }
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59
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60 static void
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61 determine(char path[], size_t pathlen)
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62 {
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63 char localassets[PATH_MAX];
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64 char *base = SDL_GetBasePath();
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65 DIR *dp;
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66
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67 /* Try assets directory where executable lives. */
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68 snprintf(localassets, sizeof (localassets), "%sassets", base);
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69
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70 if ((dp = opendir(localassets))) {
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71 snprintf(path, pathlen, "%sassets", base);
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72 closedir(dp);
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73 } else {
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74 /* We are not in the project source directory. */
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75 if (is_absolute(SHAREDIR)) {
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76 /* SHAREDIR is absolute */
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77 snprintf(path, pathlen, "%s/molko", SHAREDIR);
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78 } else if (is_absolute(BINDIR)) {
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79 /* SHAREDIR is relative but BINDIR is absolute */
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80 snprintf(path, pathlen, "%s/%s/molko", PREFIX, SHAREDIR);
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81 } else {
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82 /* SHAREDIR, BINDIR are both relative */
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83 char *ptr = strstr(base, BINDIR);
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85 if (ptr) {
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86 *ptr = '\0';
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87 snprintf(path, pathlen, "%s%s/molko", base, SHAREDIR);
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88 } else {
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89 /* Unable to determine. */
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90 snprintf(path, pathlen, ".");
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91 }
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92 }
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93 }
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94
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95 SDL_free(base);
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96 }
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97
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98 #endif
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99
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100 bool
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101 sys_init(void)
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102 {
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103 #if defined(__MINGW64__)
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104 /* On MinGW buffering leads to painful debugging. */
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105 setbuf(stderr, NULL);
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106 setbuf(stdout, NULL);
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107 #endif
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108
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109 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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110 return error_sdl();
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111 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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112 return error_sdl();
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113 if (TTF_Init() < 0)
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114 return error_sdl();
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115 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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116 return error_sdl();
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117 if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
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118 return error_sdl();
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119
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120 return true;
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121 }
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122
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123 const char *
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124 sys_datadir(void)
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125 {
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126 static char path[PATH_MAX];
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127
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128 if (path[0] == '\0')
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129 determine(path, sizeof (path));
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130
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131 return path;
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132 }
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133
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134 const char *
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135 sys_datapath(const char *fmt, ...)
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136 {
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137 const char *ret;
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138 va_list ap;
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139
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140 va_start(ap, fmt);
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141 ret = sys_datapathv(fmt, ap);
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142 va_end(ap);
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143
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144 return ret;
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145 }
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146
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147 const char *
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148 sys_datapathv(const char *fmt, va_list ap)
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149 {
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150 static char path[PATH_MAX];
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151 char filename[FILENAME_MAX];
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152
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153 vsnprintf(filename, sizeof (filename), fmt, ap);
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154 snprintf(path, sizeof (path), "%s/%s", sys_datadir(), filename);
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155
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156 return path;
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157 }
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158
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159 const char *
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160 sys_savepath(unsigned int idx)
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161 {
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162 static char path[PATH_MAX];
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163 char *pref;
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164
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165 if ((pref = SDL_GetPrefPath("malikania", "molko"))) {
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166 snprintf(path, sizeof (path), "%ssave-%u", pref, idx);
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167 SDL_free(pref);
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168 } else
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169 snprintf(path, sizeof (path), "save-%u", idx);
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170
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171 return path;
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172 }
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173
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174 void
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175 sys_finish(void)
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176 {
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177 Mix_Quit();
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178 TTF_Quit();
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179 IMG_Quit();
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180 SDL_Quit();
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181 }