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

struct vector3 {
  int x, y ,z;
};

//__attribute__((annotate("sensitive"))) struct vector3 asdfadsfasd;

void add(struct vector3* v, struct vector3* w) {
  v->x += w->x;
  v->y += w->y;
  v->z += w->z;
}

void copy(struct vector3* dst, struct vector3* src) {
  memcpy(dst, src, sizeof(struct vector3));
}

void swap(struct vector3* a, struct vector3* b){
  int x = a->x;
  int y = a->y;
  int z = a->z;

  a->x = b->x;
  a->y = b->y;
  a->z = b->z;

  b->x = x;
  b->y = y;
  b->z = z;
}

int get_smallest(struct vector3* vs, int start, int N);

void selection_sort(struct vector3* vs, int N) {
  for (int i = 0; i < N; i++) {
    int idx = get_smallest(vs, i, N);
    swap(&vs[idx], &vs[i]);
  }
}

int get_smallest(struct vector3* vs, int start, int N) {
  int smallest = vs[start].x;
  int idx = start;
  for (int i = start; i < N; ++i) {
    if (vs[i].x < smallest) {
      idx = i;
      smallest = vs[i].x;
    }
  }
  return idx;
}

struct vector3* make_random_arr(int N) {
  struct vector3* arr = malloc(sizeof(struct vector3)*N);
  for (int i = 0; i < N; ++i) {
    arr[i].x = rand() % 100;
    arr[i].y = rand() % 100;
    arr[i].z = rand() % 100;
  }
  return arr;
}

int main(int argc, char** argv) {
  printf("argc = %i\n", argc);
  printf("argv[0] = %s\n", argv[0]);

  int x;
  printf("&x = %p\n", &x);

  srand(time(NULL));
  struct vector3* arr = make_random_arr(3);
  struct vector3* arr2 = make_random_arr(10);
  struct vector3* a = &arr[0];
  struct vector3* b = &arr[1];
  struct vector3* c = &arr[2];

  if (argc == 1) {
    add(c, b);
  } else {
    add(c, b);
    add(c, b);
  }

  selection_sort(arr, 3);
  selection_sort(arr2, 10);

  printf("should be random: %i %i %i\n", a->x, a->y, a->z);
  printf("should be sorted: %i %i %i\n", arr2[0].x, arr2[1].x, arr2[2].x);


  return 0;