C++ (Cpp) SDL_UDEV_CallbackList示例

示例#1

文件： SDL_udev.c 项目： chagara/ufoai

static void
device_event(SDL_UDEV_deviceevent type, struct udev_device *dev)
{
    const char *subsystem;
    const char *val = NULL;
    int devclass = 0;
    const char *path;
    SDL_UDEV_CallbackList *item;

    path = _this->udev_device_get_devnode(dev);
    if (path == NULL) {
        return;
    }

    subsystem = _this->udev_device_get_subsystem(dev);
    if (SDL_strcmp(subsystem, "sound") == 0) {
        devclass = SDL_UDEV_DEVICE_SOUND;
    } else if (SDL_strcmp(subsystem, "input") == 0) {
        val = _this->udev_device_get_property_value(dev, "ID_INPUT_JOYSTICK");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_JOYSTICK;
        }

        val = _this->udev_device_get_property_value(dev, "ID_INPUT_MOUSE");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_MOUSE;
        }

        val = _this->udev_device_get_property_value(dev, "ID_INPUT_KEYBOARD");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_KEYBOARD;
        }

        if (devclass == 0) {
            // Fall back to old style input classes
            val = _this->udev_device_get_property_value(dev, "ID_CLASS");
            if (val != NULL) {
                if (SDL_strcmp(val, "joystick") == 0) {
                    devclass = SDL_UDEV_DEVICE_JOYSTICK;
                } else if (SDL_strcmp(val, "mouse") == 0) {
                    devclass = SDL_UDEV_DEVICE_MOUSE;
                } else if (SDL_strcmp(val, "kbd") == 0) {
                    devclass = SDL_UDEV_DEVICE_KEYBOARD;
                } else {
                    return;
                }
            } else {
                return;
            }
        }
    } else {
        return;
    }

    /* Process callbacks */
    for (item = _this->first; item != NULL; item = item->next) {
        item->callback(type, devclass, path);
    }
}

示例#2

文件： SDL_udev.c 项目： Derek-OBrien/DsdlEngine

static void 
device_event(SDL_UDEV_deviceevent type, struct udev_device *dev) 
{
    const char *subsystem;
    const char *val = NULL;
    int devclass = 0;
    const char *path;
    SDL_UDEV_CallbackList *item;
    
    path = _this->udev_device_get_devnode(dev);
    if (path == NULL) {
        return;
    }
    
    subsystem = _this->udev_device_get_subsystem(dev);
    if (SDL_strcmp(subsystem, "sound") == 0) {
        devclass = SDL_UDEV_DEVICE_SOUND;
    } else if (SDL_strcmp(subsystem, "input") == 0) {
        /* udev rules reference: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c */
        
        val = _this->udev_device_get_property_value(dev, "ID_INPUT_JOYSTICK");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_JOYSTICK;
        }
        
        val = _this->udev_device_get_property_value(dev, "ID_INPUT_MOUSE");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_MOUSE;
        }

        /* The undocumented rule is:
           - All devices with keys get ID_INPUT_KEY
           - From this subset, if they have ESC, numbers, and Q to D, it also gets ID_INPUT_KEYBOARD
           
           Ref: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c#n183
        */
        val = _this->udev_device_get_property_value(dev, "ID_INPUT_KEY");
        if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
            devclass |= SDL_UDEV_DEVICE_KEYBOARD;
        }

        if (devclass == 0) {
            /* Fall back to old style input classes */
            val = _this->udev_device_get_property_value(dev, "ID_CLASS");
            if (val != NULL) {
                if (SDL_strcmp(val, "joystick") == 0) {
                    devclass = SDL_UDEV_DEVICE_JOYSTICK;
                } else if (SDL_strcmp(val, "mouse") == 0) {
                    devclass = SDL_UDEV_DEVICE_MOUSE;
                } else if (SDL_strcmp(val, "kbd") == 0) {
                    devclass = SDL_UDEV_DEVICE_KEYBOARD;
                } else {
                    return;
                }
            } else {
                /* We could be linked with libudev on a system that doesn't have udev running */
                devclass = guess_device_class(dev);
            }
        }
    } else {
        return;
    }
    
    /* Process callbacks */
    for (item = _this->first; item != NULL; item = item->next) {
        item->callback(type, devclass, path);
    }
}