SDL_libretro_config.h

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#if defined(SDL_LIBRETRO_IMPLEMENTATION) && !defined(SDL_LIBRETRO_CONFIG_IMPL_ONCE)
#define SDL_LIBRETRO_CONFIG_IMPL_ONCE
 
static void SDL_Libretro_SanitizeSectionName(char* dst, size_t dstSize, const char* name) {
    SDL_strlcpy(dst, name, dstSize);
    for (char* p = dst; *p; ++p) {
        if (*p == '[' || *p == ']' || *p == '\n' || *p == '\r') {
            *p = '_';
        }
    }
}
 
bool SDL_Libretro_InitConfigFile(SDL_Libretro* lr, const char* file) {
    if (!lr || !file) return false;
 
    // Clear our any existing config.
    SDL_free(lr->iniFile);
    lr->iniFile = NULL;
    INI_Destroy(lr->ini);
    lr->ini = NULL;
 
    // Load the file.
    SDL_ini* ini = INI_Load(file);
    if (!ini) {
        ini = INI_Create();
        if (!ini) return false;
    }
 
    // Capture the ini file path.
    lr->iniFile = SDL_strdup(file);
    if (!lr->iniFile) {
        INI_Destroy(ini);
        return false;
    }
    lr->ini = ini;
 
    // Get all the configs.
    if (INI_HasValue(ini, NULL, "volume"))
        SDL_Libretro_SetVolume(lr, INI_GetFloat(ini, NULL, "volume", SDL_Libretro_GetVolume(lr)));
    if (INI_HasValue(ini, NULL, "username"))
        SDL_Libretro_SetUsername(lr, INI_GetString(ini, NULL, "username", SDL_Libretro_GetUsername(lr)));
    if (INI_HasValue(ini, NULL, "audiolatency"))
        SDL_Libretro_SetAudioLatency(lr, (unsigned)INI_GetInt(ini, NULL, "audiolatency", SDL_Libretro_GetAudioLatency(lr)));
    if (INI_HasValue(ini, NULL, "fitmode"))
        SDL_Libretro_SetFitMode(lr, INI_GetInt(ini, NULL, "fitmode", SDL_Libretro_GetFitMode(lr)));
    if (INI_HasValue(ini, NULL, "savedirectory"))
        SDL_Libretro_SetSaveDirectory(lr, INI_GetString(ini, NULL, "savedirectory", SDL_Libretro_GetSaveDirectory(lr)));
    if (INI_HasValue(ini, NULL, "systemdirectory"))
        SDL_Libretro_SetSystemDirectory(lr, INI_GetString(ini, NULL, "systemdirectory", SDL_Libretro_GetSystemDirectory(lr)));
    if (INI_HasValue(ini, NULL, "coredirectory"))
        SDL_Libretro_SetCoreDirectory(lr, INI_GetString(ini, NULL, "coredirectory", SDL_Libretro_GetCoreDirectory(lr)));
    if (INI_HasValue(ini, NULL, "coreassetsdirectory"))
        SDL_Libretro_SetCoreAssetsDirectory(lr, INI_GetString(ini, NULL, "coreassetsdirectory", SDL_Libretro_GetCoreAssetsDirectory(lr)));
 
    return true;
}
 
bool SDL_Libretro_InitConfig(SDL_Libretro* lr, const char* org, const char* app) {
    if (!lr) return false;
    if (!org || org[0] == '\0') org = "SDL_libretro";
    if (!app || app[0] == '\0') app = "SDL_libretro";
    char* prefPath = SDL_GetPrefPath(org, app);
    if (!prefPath) return false;
    char path[SDL_LIBRETRO_MAX_PATH];
    SDL_snprintf(path, sizeof(path), "%s%s.cfg", prefPath, app);
    SDL_free(prefPath);
    return SDL_Libretro_InitConfigFile(lr, path);
}
 
static void SDL_Libretro_SetCoreConfigOption(void *userdata, const SDL_ini *ini, const char* section, const char *key, const char *value) {
    (void)ini;
    (void)section;
    SDL_Libretro_SetOptionValue((SDL_Libretro*)userdata, key, value);
}
 
static bool SDL_Libretro_LoadCoreConfig(SDL_Libretro* lr) {
    if (!lr || !lr->ini || !SDL_Libretro_IsCoreReady(lr)) return false;
 
    // Set the library name as the section name.
    char section[256];
    SDL_Libretro_SanitizeSectionName(section, sizeof(section), lr->core.libraryName);
 
    // Ensure there's a valid section name to enumerate.
    if (section[0] == '\0') {
        return false;
    }
    INI_EnumerateKeys(lr->ini, section, &SDL_Libretro_SetCoreConfigOption, (void*)lr);
    return true;
}
 
static bool SDL_Libretro_SaveCoreConfig(SDL_Libretro* lr) {
    if (!lr || !lr->ini || !SDL_Libretro_IsCoreReady(lr)) return false;
    char section[256];
    SDL_Libretro_SanitizeSectionName(section, sizeof(section), lr->core.libraryName);
    if (section[0] == '\0') {
        return false;
    }
    int count = SDL_Libretro_GetOptionCount(lr);
    for (int i = 0; i < count; i++) {
        const SDL_LibretroOption* option = SDL_Libretro_GetOptionByIndex(lr, i);
        if (!option) continue;
        const char* val = option->value ? option->value : option->defaultValue;
        // Only set the value in the config if they're different from the defaults.
        if (option->defaultValue && SDL_strcmp(val, option->defaultValue) == 0) {
            INI_RemoveKey(lr->ini, section, option->key);
            continue;
        }
        INI_SetString(lr->ini, section, option->key, val);
    }
    return true;
}
 
static bool SDL_Libretro_SaveConfig(SDL_Libretro* lr) {
    if (!lr || !lr->ini || !lr->iniFile) return false;
 
    // Save the core options if needed.
    if (lr->core.loaded) {
        SDL_Libretro_SaveCoreConfig(lr);
    }
 
    INI_SetFloat(lr->ini, NULL, "volume", SDL_Libretro_GetVolume(lr));
    INI_SetString(lr->ini, NULL, "username", SDL_Libretro_GetUsername(lr));
    INI_SetInt(lr->ini, NULL, "audiolatency", (Sint64)SDL_Libretro_GetAudioLatency(lr));
    INI_SetInt(lr->ini, NULL, "fitmode", (Sint64)SDL_Libretro_GetFitMode(lr));
    INI_SetString(lr->ini, NULL, "savedirectory", SDL_Libretro_GetSaveDirectory(lr));
    INI_SetString(lr->ini, NULL, "systemdirectory", SDL_Libretro_GetSystemDirectory(lr));
    INI_SetString(lr->ini, NULL, "coredirectory", SDL_Libretro_GetCoreDirectory(lr));
    INI_SetString(lr->ini, NULL, "coreassetsdirectory", SDL_Libretro_GetCoreAssetsDirectory(lr));
 
    return INI_Save(lr->ini, lr->iniFile);
}
 
static bool SDL_Libretro_CloseConfig(SDL_Libretro* lr) {
    if (!lr) return false;
    bool ok = SDL_Libretro_SaveConfig(lr);
    SDL_free(lr->iniFile);
    lr->iniFile = NULL;
    INI_Destroy(lr->ini);
    lr->ini = NULL;
    return ok;
}
 
#endif