SDL2 ffb debug snippet for the desperate

gistfile1.txt

static FILE* log_file = NULL;
#define LOG(...) { \
	if(log_file == NULL){ \
		log_file = fopen("./ffb_log.txt", "w"); \
	} \
	fprintf(log_file, __VA_ARGS__); \
	fflush(log_file); \
}

static void dump_direction(SDL_HapticDirection *d){
	const char *name = "wdf";
	switch(d->type){
		case SDL_HAPTIC_POLAR:
			name = "polar";
			break;
		case SDL_HAPTIC_CARTESIAN:
			name = "cartesian";
			break;
		case SDL_HAPTIC_SPHERICAL:
			name = "spherical";
			break;
		case SDL_HAPTIC_STEERING_AXIS:
			name = "steering axis";
			break;
	}
	LOG("direction: %s %d %d %d\n", name, d->dir[0], d->dir[1], d->dir[2]);
}

static void dump_effect(const char *caller, SDL_HapticEffect *e){
	const char *name = "wtf";
	if(effect_is_periodic(e)){
		SDL_HapticPeriodic *ee = (SDL_HapticPeriodic *)e;
		switch(ee->type){
			case SDL_HAPTIC_SINE:
				name = "sine";
				break;
			case SDL_HAPTIC_TRIANGLE:
				name = "triangle";
				break;
			case SDL_HAPTIC_SAWTOOTHUP:
				name = "sawtooth up";
				break;
			case SDL_HAPTIC_SAWTOOTHDOWN:
				name = "sawtooth down";
				break;
			/*
			case SDL_HAPTIC_SQUARE:
				name = "square";
				break;
			*/
		}
		LOG("%s: periodic effect %s:\n", caller, name);
		dump_direction(&ee->direction);

		LOG("length: %u\n", ee->length);
		LOG("delay: %u\n", ee->delay);

		LOG("button: %x\n", ee->button);
		LOG("interval: %u\n", ee->interval);

		LOG("period: %u\n", ee->period);
		LOG("magnitude: %d\n", ee->magnitude);
		LOG("offset: %d\n", ee->offset);
		LOG("phase: %u\n", ee->phase);

		LOG("attack length: %u\n", ee->attack_length);
		LOG("attack level: %u\n", ee->attack_level);
		LOG("fade length: %u\n", ee->fade_length);
		LOG("fade level: %u\n", ee->fade_level);
	}else if(effect_is_condition(e)){
		SDL_HapticCondition *ee = (SDL_HapticCondition *)e;
		switch(ee->type){
			case SDL_HAPTIC_SPRING:
				name = "spring";
				break;
			case SDL_HAPTIC_DAMPER:
				name = "damper";
				break;
			case SDL_HAPTIC_FRICTION:
				name = "friction";
				break;
		}
		LOG("%s: condition effect %s:\n", caller, name);
		dump_direction(&ee->direction);

		LOG("length: %u\n", ee->length);
		LOG("delay: %u\n", ee->delay);

		LOG("button: %x\n", ee->button);
		LOG("interval: %u\n", ee->interval);

		LOG("right sat %u %u %u\n", ee->right_sat[0], ee->right_sat[1], ee->right_sat[2]);
		LOG("left sat %u %u %u\n", ee->left_sat[0], ee->left_sat[1], ee->left_sat[2]);
		LOG("right coeff %d %d %d\n", ee->right_coeff[0], ee->right_coeff[1], ee->right_coeff[2]);
		LOG("left coeff %d %d %d\n", ee->left_coeff[0], ee->left_coeff[1], ee->left_coeff[2]);
		LOG("deadband %u %u %u\n", ee->deadband[0], ee->deadband[1], ee->deadband[2]);
		LOG("center %d %d %d\n", ee->center[0], ee->center[1], ee->center[2]);
	}else{
		switch(e->type){
			case SDL_HAPTIC_CONSTANT:{
				SDL_HapticConstant *ee = (SDL_HapticConstant *)e;
				LOG("%s: constant effect\n", caller);
				dump_direction(&ee->direction);

				LOG("length: %u\n", ee->length);
				LOG("delay: %u\n", ee->delay);

				LOG("button: %x\n", ee->button);
				LOG("interval: %u\n", ee->interval);

				LOG("level: %d\n", ee->level);

				LOG("attack length: %u\n", ee->attack_length);
				LOG("attack level: %u\n", ee->attack_level);
				LOG("fade length: %u\n", ee->fade_length);
				LOG("fade level: %u\n", ee->fade_level);
				break;
			}
			case SDL_HAPTIC_RAMP:{
				SDL_HapticRamp *ee = (SDL_HapticRamp *)e;
				LOG("%s: ramp effect\n", caller);
				dump_direction(&ee->direction);

				LOG("length: %u\n", ee->length);
				LOG("delay: %u\n", ee->delay);

				LOG("button: %x\n", ee->button);
				LOG("interval: %u\n", ee->interval);

				LOG("start: %d\n", ee->start);
				LOG("end: %d\n", ee->end);
				LOG("attack length: %u\n", ee->attack_length);
				LOG("attack level: %u\n", ee->attack_level);
				LOG("fade length: %u\n", ee->fade_length);
				LOG("fade level: %u\n", ee->fade_level);
				break;
			}
			default:{
				LOG("%s: haptic effect %d\n", caller, e->type);
			}
		}
	}
}