#include <stdio.h>
#include <stdlib.h>
#include "pico/stdlib.h"

#include "vector.h"

int main() {
    // Initialize
    stdio_init_all();
  
    Vector vector;
    VectorInit(&vector);

    printf("Initial - count: %d, limit: %d\n", vector.count, vector.limit);

    // Add Days of the week
    vector.push(&vector, "Sunday");
    vector.push(&vector, "Monday");
    vector.push(&vector, "Saturday");
    vector.push(&vector, "Wednesday");
    vector.push(&vector, "Thursday");
    vector.push(&vector, "Friday");
    vector.push(&vector, "Tuesday");

    printf("After Add - count: %d, limit: %d\n", vector.count, vector.limit);

    vector.remove(&vector, 2);

    printf("After Remove - count: %d, limit: %d\n", vector.count, vector.limit);

    vector.push(&vector, "Saturday");

    printf("After Add - count: %d, limit: %d\n", vector.count, vector.limit);

    printf("\nDays of the Week:\n");

    for (int i = 0; i < vector.count; i++) {
        printf("%s\n", (char *)vector.data[i]);
    }

    vector.free(&vector);

    while (true) {
        sleep_ms(250);
    }

    return 0;
}


main.c

diagram.json

#ifndef VECTOR_H
#define VECTOR_H

#define VECTOR_INITIAL_LIMIT 5

typedef struct Vector {
    void **data;
    int limit;
    int count;
    void (*push)(struct Vector *, void *);
    void (*remove)(struct Vector *, int);
    void (*free)(struct Vector *);
} Vector;

void VectorInit(Vector *vector);

#endif


vector.h

#include <stdlib.h>
#include "vector.h"

void VectorPush(Vector *self, void *data)
{
    // Resize if needed
    if (self->count == self->limit) {
        self->limit = self->limit * 2;
        self->data = realloc(self->data, sizeof(void *) * self->limit);
    }

    // Add data
    self->data[self->count] = data;
    self->count++;
}

void VectorRemove(Vector *self, int index)
{
    if (index > -1 && index < self->count) {
        // Swap the last item to the index to be removed
        // then remove the last item
        self->data[index] = self->data[self->count - 1];
        self->data[self->count - 1] = NULL;
        self->count--;
    }
}

void VectorFree(Vector *self)
{
    if (self->data) {
        free(self->data);
        self->data = NULL;
    }
}

void VectorInit(Vector *vector)
{
    vector->limit = VECTOR_INITIAL_LIMIT;
    vector->count = 0;
    vector->push = VectorPush;
    vector->remove = VectorRemove;
    vector->free = VectorFree;
    vector->data = malloc(sizeof(void *) * vector->limit);
}
