finds series of movements given a start angle to achieve a given end angle range in Zelda Ocarina of Time and Majoras Mask

Zelda64 Angle Finder.c

#include <stdio.h>
#include <stdlib.h>

typedef struct _link_mvmt {
	int offset;
	char name[20];
} link_mvmt;

link_mvmt possible_movements[] = {
	{32767,  "180 TURN"},
	{-16383,  "90 TURN RIGHT"},
	{16383, "90 TURN LEFT"},
	{-15000,  "BACKFLIP ROLL"},
	{-7384, 	 "SIDEHOP ROLL RIGHT"},
	{7384,  "SIDEHOP ROLL LEFT"}
};

unsigned sz_possible_mvmts = sizeof(possible_movements) / sizeof(*possible_movements);

int factorial(int n){
	if(n == 0)
		return 0;
	else if(n == 1)
		return 1;
	else
		return n * factorial(n-1);
}


typedef unsigned int movement;


int main(int argc, char** argv) {

	if(argc != 5)
		goto paramerrors;

	int
		src_ang = atoi(argv[1]),
		dst_ang_lo = atoi(argv[2]),
		dst_ang_hi = atoi(argv[3]),
		moves_allowed = atoi(argv[4]);

	if(!moves_allowed)
		goto paramerrors;

	int
		possible_combinations = factorial(moves_allowed);

	int i, j;
	int working_combinations = 0;
	trialcombinations:
	{
		int *m = malloc(sizeof(movement) * moves_allowed);
		unsigned short trial_ang;
		for (i = 0; i < moves_allowed; ++i)
			m[i] = 0;
		for (i = 0; i < possible_combinations; ++i)
		{
			trial_ang = src_ang;
			m[0]++;
			for (j = 1; j < moves_allowed; ++j)
			{
				if (m[j - 1] > sz_possible_mvmts)
				{
					m[j - 1] = 0;
					m[j]++;
				}
			}
			for (j = 0; j < moves_allowed; ++j)
			{
				if (m[j] == 0)
					continue;
				trial_ang += possible_movements[m[j] - 1].offset;
			}
			if (trial_ang <= dst_ang_hi && trial_ang >= dst_ang_lo)
			{
				printf("Setup found:\n");
				int idx = 0;
				for (j = 0; j < moves_allowed; ++j)
				{
					if (m[j] == 0)
						continue;
					printf("move %d: %s\n", idx++, possible_movements[m[j] - 1].name);
				}
				printf("end angle = %d\n", trial_ang);
				return 0;
			}
		}
		
	}

	if(working_combinations == 0)
		printf("No possible combinations found :c\n");
	return 0;

paramerrors:
	printf("Incorrect parameters, require <src angle> <dst angle range low> <dst angle range high> <allowed moves>");
	return 0;
}