C Vec - Dynamic Array Library

C Vec is a simple dynamic array library for C, provided as a single header file. It automatically resizes arrays as you add elements.

Usage

Add the vec.h to Your Project

Just copy the vec.h file and include it:

#include "vec.h"

Create a Dynamic Array

int* my_vec = vec(int);

Add Elements

vec_push(my_vec, 10);
vec_push(my_vec, 20);

Access Elements

Just like a regular array.

int first = my_vec[0];

Access Length and Capacity

size_t len = vec_length(my_vec);
size_t cap = vec_capacity(my_vec);

Free Memory

• If your vector holds simple data types like int, use:

vec_destroy(my_vec);

• If your vector holds dynamically allocated pointers (e.g., struct pointers), use vec_destroyemall to free each element and the vector itself:

vec_destroyemall(my_vec, MyStruct*);

Example: Freeing Struct Pointers

typedef struct {
    int x;
    int y;
} MyStruct;

MyStruct** my_vec = vec(MyStruct*);

// Dynamically allocate and add elements
MyStruct* p1 = (MyStruct*)malloc(sizeof(MyStruct));
vec_push(my_vec, p1);

// Free the elements and the vector
vec_destroyemall(my_vec, MyStruct*);

This ensures both the individual dynamically allocated elements and the vector metadata are properly freed.