git subrepo clone https://github.com/libretro/libretro-common.git deps/libretro-common
[pcsx_rearmed.git] / deps / libretro-common / samples / core_options / example_default / libretro_core_options.h
1 #ifndef LIBRETRO_CORE_OPTIONS_H__
2 #define LIBRETRO_CORE_OPTIONS_H__
3
4 #include <stdlib.h>
5 #include <string.h>
6
7 #include <libretro.h>
8 #include <retro_inline.h>
9
10 #ifndef HAVE_NO_LANGEXTRA
11 #include "libretro_core_options_intl.h"
12 #endif
13
14 /*
15  ********************************
16  * VERSION: 1.3
17  ********************************
18  *
19  * - 1.3: Move translations to libretro_core_options_intl.h
20  *        - libretro_core_options_intl.h includes BOM and utf-8
21  *          fix for MSVC 2010-2013
22  *        - Added HAVE_NO_LANGEXTRA flag to disable translations
23  *          on platforms/compilers without BOM support
24  * - 1.2: Use core options v1 interface when
25  *        RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION is >= 1
26  *        (previously required RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION == 1)
27  * - 1.1: Support generation of core options v0 retro_core_option_value
28  *        arrays containing options with a single value
29  * - 1.0: First commit
30 */
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 /*
37  ********************************
38  * Core Option Definitions
39  ********************************
40 */
41
42 /* RETRO_LANGUAGE_ENGLISH */
43
44 /* Default language:
45  * - All other languages must include the same keys and values
46  * - Will be used as a fallback in the event that frontend language
47  *   is not available
48  * - Will be used as a fallback for any missing entries in
49  *   frontend language definition */
50
51 struct retro_core_option_definition option_defs_us[] = {
52    {
53       "mycore_region",                            /* key (option name) */
54       "Console Region",                           /* description (label) */
55       "Specify which region the system is from.", /* sublabel */
56       {
57          { "auto",   "Auto" },                    /* value_1, value_1_label */
58          { "ntsc-j", "Japan" },                   /* value_2, value_2_label */
59          { "ntsc-u", "America" },                 /* value_3, value_3_label */
60          { "pal",    "Europe" },                  /* value_4, value_4_label */
61          { NULL, NULL },
62       },
63       "auto"                                      /* default_value */
64    },
65    {
66       "mycore_video_scale",
67       "Video Scale",
68       "Set internal video scale factor.",
69       {
70          { "1x", NULL }, /* If value itself is human-readable (e.g. a number)  */
71          { "2x", NULL }, /* and can displayed directly, the value_label should */
72          { "3x", NULL }, /* be set to NULL                                     */
73          { "4x", NULL },
74          { NULL, NULL },
75       },
76       "3x"
77    },
78    {
79       "mycore_overclock",
80       "Reduce Slowdown",
81       "Enable CPU overclock (unsafe).",
82       {
83          { "enabled",  NULL }, /* If value is equal to 'enabled' or 'disabled', */
84          { "disabled", NULL }, /* value_label should be set to NULL             */
85          { NULL, NULL },
86       },
87       "disabled"
88    },
89    { NULL, NULL, NULL, {{0}}, NULL },
90 };
91
92 /*
93  ********************************
94  * Language Mapping
95  ********************************
96 */
97
98 #ifndef HAVE_NO_LANGEXTRA
99 struct retro_core_option_definition *option_defs_intl[RETRO_LANGUAGE_LAST] = {
100    option_defs_us, /* RETRO_LANGUAGE_ENGLISH */
101    NULL,           /* RETRO_LANGUAGE_JAPANESE */
102    NULL,           /* RETRO_LANGUAGE_FRENCH */
103    NULL,           /* RETRO_LANGUAGE_SPANISH */
104    NULL,           /* RETRO_LANGUAGE_GERMAN */
105    NULL,           /* RETRO_LANGUAGE_ITALIAN */
106    NULL,           /* RETRO_LANGUAGE_DUTCH */
107    NULL,           /* RETRO_LANGUAGE_PORTUGUESE_BRAZIL */
108    NULL,           /* RETRO_LANGUAGE_PORTUGUESE_PORTUGAL */
109    NULL,           /* RETRO_LANGUAGE_RUSSIAN */
110    NULL,           /* RETRO_LANGUAGE_KOREAN */
111    NULL,           /* RETRO_LANGUAGE_CHINESE_TRADITIONAL */
112    NULL,           /* RETRO_LANGUAGE_CHINESE_SIMPLIFIED */
113    NULL,           /* RETRO_LANGUAGE_ESPERANTO */
114    NULL,           /* RETRO_LANGUAGE_POLISH */
115    NULL,           /* RETRO_LANGUAGE_VIETNAMESE */
116    NULL,           /* RETRO_LANGUAGE_ARABIC */
117    NULL,           /* RETRO_LANGUAGE_GREEK */
118    NULL,           /* RETRO_LANGUAGE_TURKISH */
119    NULL,           /* RETRO_LANGUAGE_SLOVAK */
120    NULL,           /* RETRO_LANGUAGE_PERSIAN */
121    NULL,           /* RETRO_LANGUAGE_HEBREW */
122    NULL,           /* RETRO_LANGUAGE_ASTURIAN */
123    NULL,           /* RETRO_LANGUAGE_FINNISH */
124    NULL,           /* RETRO_LANGUAGE_INDONESIAN */
125    NULL,           /* RETRO_LANGUAGE_SWEDISH */
126    NULL,           /* RETRO_LANGUAGE_UKRAINIAN */
127    NULL,           /* RETRO_LANGUAGE_CZECH */
128
129 };
130 #endif
131
132 /*
133  ********************************
134  * Functions
135  ********************************
136 */
137
138 /* Handles configuration/setting of core options.
139  * Should be called as early as possible - ideally inside
140  * retro_set_environment(), and no later than retro_load_game()
141  * > We place the function body in the header to avoid the
142  *   necessity of adding more .c files (i.e. want this to
143  *   be as painless as possible for core devs)
144  */
145
146 static INLINE void libretro_set_core_options(retro_environment_t environ_cb)
147 {
148    unsigned version = 0;
149
150    if (!environ_cb)
151       return;
152
153    if (environ_cb(RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION, &version) && (version >= 1))
154    {
155 #ifndef HAVE_NO_LANGEXTRA
156       struct retro_core_options_intl core_options_intl;
157       unsigned language = 0;
158
159       core_options_intl.us    = option_defs_us;
160       core_options_intl.local = NULL;
161
162       if (environ_cb(RETRO_ENVIRONMENT_GET_LANGUAGE, &language) &&
163           (language < RETRO_LANGUAGE_LAST) && (language != RETRO_LANGUAGE_ENGLISH))
164          core_options_intl.local = option_defs_intl[language];
165
166       environ_cb(RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL, &core_options_intl);
167 #else
168       environ_cb(RETRO_ENVIRONMENT_SET_CORE_OPTIONS, &option_defs_us);
169 #endif
170    }
171    else
172    {
173       size_t i;
174       size_t num_options               = 0;
175       struct retro_variable *variables = NULL;
176       char **values_buf                = NULL;
177
178       /* Determine number of options */
179       for (;;)
180       {
181          if (!option_defs_us[num_options].key)
182             break;
183          num_options++;
184       }
185
186       /* Allocate arrays */
187       variables  = (struct retro_variable *)calloc(num_options + 1, sizeof(struct retro_variable));
188       values_buf = (char **)calloc(num_options, sizeof(char *));
189
190       if (!variables || !values_buf)
191          goto error;
192
193       /* Copy parameters from option_defs_us array */
194       for (i = 0; i < num_options; i++)
195       {
196          const char *key                        = option_defs_us[i].key;
197          const char *desc                       = option_defs_us[i].desc;
198          const char *default_value              = option_defs_us[i].default_value;
199          struct retro_core_option_value *values = option_defs_us[i].values;
200          size_t buf_len                         = 3;
201          size_t default_index                   = 0;
202
203          values_buf[i] = NULL;
204
205          if (desc)
206          {
207             size_t num_values = 0;
208
209             /* Determine number of values */
210             for (;;)
211             {
212                if (!values[num_values].value)
213                   break;
214
215                /* Check if this is the default value */
216                if (default_value)
217                   if (strcmp(values[num_values].value, default_value) == 0)
218                      default_index = num_values;
219
220                buf_len += strlen(values[num_values].value);
221                num_values++;
222             }
223
224             /* Build values string */
225             if (num_values > 0)
226             {
227                size_t j;
228
229                buf_len += num_values - 1;
230                buf_len += strlen(desc);
231
232                values_buf[i] = (char *)calloc(buf_len, sizeof(char));
233                if (!values_buf[i])
234                   goto error;
235
236                strcpy(values_buf[i], desc);
237                strcat(values_buf[i], "; ");
238
239                /* Default value goes first */
240                strcat(values_buf[i], values[default_index].value);
241
242                /* Add remaining values */
243                for (j = 0; j < num_values; j++)
244                {
245                   if (j != default_index)
246                   {
247                      strcat(values_buf[i], "|");
248                      strcat(values_buf[i], values[j].value);
249                   }
250                }
251             }
252          }
253
254          variables[i].key   = key;
255          variables[i].value = values_buf[i];
256       }
257
258       /* Set variables */
259       environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, variables);
260
261 error:
262
263       /* Clean up */
264       if (values_buf)
265       {
266          for (i = 0; i < num_options; i++)
267          {
268             if (values_buf[i])
269             {
270                free(values_buf[i]);
271                values_buf[i] = NULL;
272             }
273          }
274
275          free(values_buf);
276          values_buf = NULL;
277       }
278
279       if (variables)
280       {
281          free(variables);
282          variables = NULL;
283       }
284    }
285 }
286
287 #ifdef __cplusplus
288 }
289 #endif
290
291 #endif