rvec

RAII dynamic array in C

About

rvec is a lightweight and generic dynamic array library that makes use of GCC/Clang's cleanup extension to release the memory being used by the array once it goes out of scope.

Usage

rvec_t(type) v;
rvec_init(v);
rvec_push(v,val);

#include <stdio.h>
#include "rvec.h"


int main(int argc, const char *argv[]) {
    rvec_t(int) v1;
    rvec_init(v1);

    printf("cap: %zu, size: %zu\n", rvec_capacity(v1), rvec_size(v1));

    for(size_t i = 0; i < 1000; i++) {
      rvec_push(v1,i);
    }

    printf("last item: %d\n",rvec_pop(v1));

    printf("1st item: %d\n",rvec_get(v1,0));
    // or 
    printf("1st item: %d\n",rvec_i(v1,0));

    rvec_set(v1,0,999);
    // or
    rvec_i(v1,0) = 999;

    rvec_resize(v1,100);

    {
      rvec_t(double *) v2;
      rvec_init(v2);
    } // <--- v2 freed here

    return 0;
} // <-- v1 freed here

API

rvec_init(v)

Initialises the array, it must be called before any other function.

rvec_size(v)

Evaluates to the size of the array.

rvec_capacity(v)

Evaluates to the capacity of the array.

rvec_push(v,x)

Adds a new element at the end of the array.

rvec_pop(v)

Pops and returns the last value.

rvec_i(v,i)

Expands to (v)->data[(i)], it can be used like this: rvec_i(v,0) = value; or x = rvec_i(v,0);.

rvec_set(v,i,x)

rvec_set(v,index,value);.

rvec_get(v,i)

rvec_get(v,index);.

rvec_begin(v)

Returns a pointer to the first element of the array.

rvec_end(v)

Returns a pointer to one-past-the-end of the array, (like std::vector::end).

rvec_resize(v,sz)

Resizes the array.

rvec_copy(dest,src)

Copies the elements of src into dest. dest will be resized as needed.

rvec_destroy

Destroys the array. Only useful if you are using the library without RAII support (see #RVEC_NO_RAII in rvec.h).

License

https://github.com/rbnx/rvec/blob/master/rvec.h#L1-L5