Spirals!

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

void left(int size, int spiral[size][size], int x, int y);
void right(int size, int spiral[size][size], int x, int y);
void up(int size, int spiral[size][size], int x, int y);
void down(int size, int spiral[size][size], int x, int y);

//1 - right
//2 - down
//3 - left
//4 - up

void output(int size, int spiral[size][size]){
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            printf("%4d", spiral[i][j]);
        }
        printf("\n");
    }
}

void right(int size, int spiral[size][size], int x, int y){
    printf("right start: x %d y %d\n", x, y);
    int turns = 0;
    while(1){
        if(y == size - 1){
            spiral[x][y] = 1;
            break;
        } else if (spiral[x][y + 1] == 1){
            y--;
            break;
        }
        spiral[x][y] = 1;
        y++;
        turns++;
    }
    printf("right end: x %d y %d turns %d\n", x, y, turns);
    output(size, spiral);
    if(turns > 2){
        down(size, spiral, x, y);
    } else {
        return;
    }
}

void left(int size, int spiral[size][size], int x, int y){
    printf("left start: x %d y %d\n", x, y);
    int turns = 0;
    while(1){
        if(y == 0){
            spiral[x][y] = 1;
            break;
        } else if(spiral[x][y - 1] == 1){
            y++;
            break;
        }
        spiral[x][y] = 1;
        y--;
        turns++;
    }
    printf("left end: x %d y %d turns %d\n", x, y, turns);
    output(size, spiral);
    if(turns > 2){
        up(size, spiral, x, y);
    } else {
        return;
    }
}

void up(int size, int spiral[size][size], int x, int y){
    printf("up start: x %d y %d\n", x, y);
    int turns = 0;
    while(1){
        if(x == -1){
            break;
        } else if(spiral[x - 1][y] == 1){
            break;
        }
        spiral[x][y] = 1;
        x--;
        turns++;
    }
    x++;
    printf("up end: x %d y %d turns %d\n", x, y, turns);
    output(size, spiral);
    if(turns > 2){
        right(size, spiral, x, y);
    } else {
        return;
    }
}

void down(int size, int spiral[size][size], int x, int y){
    printf("down start: x %d y %d\n", x, y);
    int turns = 0;
    while(1){
        if(x == size - 1){
            spiral[x][y] = 1;
            break;
        } else if(spiral[x + 1][y] == 1){
            if(turns <= 2){
                return;
            }
            x--;
            break;
        }
        spiral[x][y] = 1;
        x++;
        turns++;
    }
    printf("down end: x %d y %d turns %d\n", x, y, turns);
    output(size, spiral);
    if(turns > 2){
        left(size, spiral, x, y);
    } else {
        return;
    }
}

void spiralize (unsigned n, int spiral[n][n]){
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            spiral[i][j] = 0;
        }
    }
    right(n, spiral, 0, 0);
}

int main(){
    int array[18][18];
    spiralize(18, array);
    printf("\n");
    output(18, array);
}