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annotate src/utils.c @ 31:61104b22a25d

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I think it is working now...
author Dennis C. M. <dennis@denniscm.com>
date Thu, 29 Jun 2023 18:05:22 +0100
parents f945bcc3571f
children
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1 #include "utils.h"
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2
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3
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4 void create_array(struct Element *arr, int arr_size, int window_height, int vpadding) {
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5 float rect_increase = (window_height - vpadding * 2) / (float)(arr_size - 1);
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6 for (int i = 1; i <= arr_size; i++) {
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7 arr[i - 1].value = i * rect_increase;
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8 arr[i - 1].current = false;
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9 }
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10 }
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12
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13 void swap_elements(int x, int y, struct Element *arr) {
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14 struct Element temp = arr[x];
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15 arr[x] = arr[y];
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16 arr[y] = temp;
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17 }
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19
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20 void randomize_array(struct Element *arr, int arr_size) {
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21 srand(time(NULL));
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22
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23 // Fisher-Yates shuffle
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24 for (int i = arr_size - 1; i > 0; i--) {
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25 int j = rand() % (i + 1);
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26
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27 // Swap
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28 swap_elements(i, j, arr);
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29 }
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30 }
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32
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33 void algorithm_selector(struct Algo *algos, int size, int direction, int *selected_algo) {
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34 int selection = *selected_algo + direction;
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35
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36 if (selection >= 0 && selection <= size - 1) {
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37 *selected_algo = selection;
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38 }
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39 }
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41
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42 void change_delay(struct AlgoArgs *algo_args, int change) {
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43 int new_delay = algo_args->delay + change;
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44
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45 if (new_delay) {
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46 algo_args->delay = new_delay;
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47 }
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48 }
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51 void control_flow(useconds_t delay, bool sequentially, bool *pause) {
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52 if (sequentially) {
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53 *pause = true;
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54 }
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55
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56 while (*pause) {
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57 // Wait to resume
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58 }
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59
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60 usleep(delay);
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61 }
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63
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64 void reset_state(struct AlgoArgs *algo_args, struct ThreadState *thread_state) {
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65 if (thread_state->running) {
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66 pthread_cancel(thread_state->thread);
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67 }
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68
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69 randomize_array(algo_args->arr, algo_args->arr_size);
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70
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71 algo_args->comparisons = 0;
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72 algo_args->pause = false;
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73 algo_args->sequentially = false;
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74
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75 for (int i = 0; i < algo_args->arr_size - 1; i++) {
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76 algo_args->arr[i].current = false;
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77 }
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78 }
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81 void run(struct AlgoArgs *algo_args, struct Algo *algos, int selected_algo,
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82 struct ThreadState *thread_state) {
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83
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84 if (algo_args->pause) {
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85 algo_args->pause = false;
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86 } else {
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87 thread_state->running = true;
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88 pthread_create(&(thread_state->thread), NULL, algos[selected_algo].function,
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89 (void *)algo_args);
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90 }
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91 }
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