annotate src/core/sys.c @ 59:52792b863ff7

misc: separate core from game
author David Demelier <markand@malikania.fr>
date Tue, 21 Jan 2020 12:42:33 +0100
parents src/sys.c@43d1102a367e
children a6c2067709ce
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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
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23 #include <SDL.h>
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24 #include <SDL_image.h>
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25 #include <SDL_mixer.h>
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26 #include <SDL_ttf.h>
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27
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28 #if !defined(_WIN32) /* Assuming POSIX */
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29 # include <sys/types.h>
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30 # include <dirent.h>
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31 #endif
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32
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33 #include "error.h"
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34 #include "error_p.h"
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35 #include "sys.h"
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36
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37 #if defined(_WIN32)
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38
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39 static void
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40 determine(char path[], size_t pathlen)
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41 {
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42 char *base = SDL_GetBasePath();
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43
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44 /* On Windows, the data hierarchy is the same as the project. */
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45 snprintf(path, pathlen, "%sassets", base);
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46 SDL_free(base);
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47 }
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48
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49 #else /* Assuming POSIX */
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50
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51 static bool
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52 is_absolute(const char *path)
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53 {
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54 assert(path);
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56 return path[0] == '/';
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57 }
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58
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59 static void
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60 determine(char path[], size_t pathlen)
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61 {
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62 char localassets[FILENAME_MAX];
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63 char *base = SDL_GetBasePath();
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64 DIR *dp;
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66 /* Try assets directory where executable lives. */
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67 snprintf(localassets, sizeof (localassets), "%sassets", base);
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68
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69 if ((dp = opendir(localassets))) {
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70 snprintf(path, pathlen, "%sassets", base);
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71 closedir(dp);
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72 } else {
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73 /* We are not in the project source directory. */
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74 if (is_absolute(SHAREDIR)) {
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75 /* SHAREDIR is absolute */
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76 snprintf(path, pathlen, "%s/molko", SHAREDIR);
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77 } else if (is_absolute(BINDIR)) {
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78 /* SHAREDIR is relative but BINDIR is absolute */
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79 snprintf(path, pathlen, "%s/%s/molko", PREFIX, SHAREDIR);
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80 } else {
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81 /* SHAREDIR, BINDIR are both relative */
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82 char *ptr = strstr(base, BINDIR);
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83
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84 if (ptr) {
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85 *ptr = '\0';
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86 snprintf(path, pathlen, "%s%s/molko", base, SHAREDIR);
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87 } else {
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88 /* Unable to determine. */
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89 snprintf(path, pathlen, ".");
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90 }
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91 }
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92 }
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93
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94 SDL_free(base);
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95 }
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96
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97 #endif
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98
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99 bool
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100 sys_init(void)
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101 {
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102 #if defined(__MINGW64__)
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103 /* On MinGW buffering leads to painful debugging. */
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104 setvbuf(stdout, NULL, _IONBF, 0);
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105 #endif
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106
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107 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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108 return error_sdl();
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109 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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110 return error_sdl();
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111 if (TTF_Init() < 0)
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112 return error_sdl();
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113 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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114 return error_sdl();
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115
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116 return true;
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117 }
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118
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119 const char *
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120 sys_datadir(void)
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121 {
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122 static char path[1024];
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123
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124 if (path[0] == '\0')
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125 determine(path, sizeof (path));
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126
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127 return path;
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128 }
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129
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130 const char *
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131 sys_datapath(const char *fmt, ...)
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132 {
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133 const char *ret;
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134 va_list ap;
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135
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136 va_start(ap, fmt);
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137 ret = sys_datapathv(fmt, ap);
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138 va_end(ap);
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139
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140 return ret;
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141 }
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142
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143 const char *
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144 sys_datapathv(const char *fmt, va_list ap)
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145 {
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146 static char path[2048 + FILENAME_MAX];
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147 char filename[FILENAME_MAX];
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148
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149 vsnprintf(filename, sizeof (filename), fmt, ap);
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150 snprintf(path, sizeof (path), "%s/%s", sys_datadir(), filename);
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151
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152 return path;
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153 }
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154
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155 void
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156 sys_close(void)
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157 {
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158 Mix_Quit();
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159 TTF_Quit();
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160 IMG_Quit();
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161 SDL_Quit();
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162 }