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annotate src/sys.c @ 36:798baf7f3ec0

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core: implement sys_data* functions for Windows
author David Demelier <markand@malikania.fr>
date Mon, 13 Jan 2020 20:48:41 +0100
parents 91bc2329ab0c
children 9d1421c09dfb
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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
32
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19 #include <assert.h>
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20
23
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21 #include <SDL.h>
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22 #include <SDL_image.h>
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23 #include <SDL_mixer.h>
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24 #include <SDL_ttf.h>
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25
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26 #if !defined(_WIN32) /* Assuming POSIX */
32
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27 # include <sys/types.h>
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28 # include <dirent.h>
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29 #endif
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30
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31 #include "sys.h"
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32
32
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33 #if defined(_WIN32)
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34
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35 static void
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36 determine(char path[], size_t pathlen)
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37 {
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38 char *base = SDL_GetBasePath();
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39
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40 /* On Windows, the data hierarchy is the same as the project. */
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41 snprintf(path, pathlen, "%sassets", base);
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42 SDL_free(base);
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43 }
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44
32
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45 #else /* Assuming POSIX */
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46
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47 static bool
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48 is_absolute(const char *path)
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49 {
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50 assert(path);
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51
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52 return path[0] == '/';
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53 }
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54
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55 static void
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56 determine(char path[], size_t pathlen)
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57 {
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58 char localassets[FILENAME_MAX];
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59 char *base = SDL_GetBasePath();
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60 DIR *dp;
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61
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62 /* Try assets directory where executable lives. */
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63 snprintf(localassets, sizeof (localassets), "%sassets", base);
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64
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65 if ((dp = opendir(localassets))) {
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66 snprintf(path, pathlen, "%sassets", base);
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67 closedir(dp);
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68 } else {
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69 /* We are not in the project source directory. */
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70 if (is_absolute(SHAREDIR)) {
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71 /* SHAREDIR is absolute */
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72 snprintf(path, pathlen, "%s/molko", SHAREDIR);
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73 } else if (is_absolute(BINDIR)) {
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74 /* SHAREDIR is relative but BINDIR is absolute */
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75 snprintf(path, pathlen, "%s/%s/molko", PREFIX, SHAREDIR);
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76 } else {
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77 /* SHAREDIR, BINDIR are both relative */
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78 char *ptr = strstr(base, BINDIR);
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79
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80 if (ptr) {
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81 *ptr = '\0';
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82 snprintf(path, pathlen, "%s%s/molko", base, SHAREDIR);
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83 } else {
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84 /* Unable to determine. */
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85 snprintf(path, pathlen, ".");
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86 }
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87 }
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88 }
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89
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90 SDL_free(base);
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91 }
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92
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93 #endif
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94
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95 bool
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96 sys_init(void)
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97 {
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98 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
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99 return false;
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100 if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
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101 return false;
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102 if (TTF_Init() < 0)
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103 return false;
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104 if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
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105 return false;
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106
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107 return true;
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108 }
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109
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110 const char *
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111 sys_datadir(void)
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112 {
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113 static char path[1024];
31
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114
32
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115 if (path[0] == '\0')
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116 determine(path, sizeof (path));
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117
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118 return path;
32
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119 }
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120
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121 const char *
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122 sys_datapath(const char *fmt, ...)
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123 {
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124 const char *ret;
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125 va_list ap;
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126
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127 va_start(ap, fmt);
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128 ret = sys_datapathv(fmt, ap);
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129 va_end(ap);
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130
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131 return ret;
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132 }
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133
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134 const char *
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135 sys_datapathv(const char *fmt, va_list ap)
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136 {
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137 static char path[2048];
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138 char filename[FILENAME_MAX];
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139
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140 vsnprintf(filename, sizeof (filename), fmt, ap);
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141 snprintf(path, sizeof (path), "%s/%s", sys_datadir(), filename);
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142
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143 return path;
31
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144 }
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145
23
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146 void
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147 sys_close(void)
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148 {
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149 Mix_Quit();
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150 TTF_Quit();
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151 IMG_Quit();
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152 SDL_Quit();
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153 }