• Arduino
• Carray

C Dynamic Array

int AddToArray (DATA item)
{
        if(num_elements == num_allocated) // Are more refs required?
        {
                // Feel free to change the initial number of refs
                // and the rate at which refs are allocated.
                if (num_allocated == 0)
                        num_allocated = 3; // Start off with 3 refs
                else
                        num_allocated *= 2; // Double the number
                                                    // of refs allocated

                // Make the reallocation transactional
                // by using a temporary variable first
                void *_tmp = realloc(the_array, (num_allocated * sizeof(DATA)));

                // If the reallocation didn't go so well,
                // inform the user and bail out
                if (!_tmp)
                {
                        fprintf(stderr, "ERROR: Couldn't realloc memory!\n");
                        return(-1);
                }

                // Things are looking good so far
                the_array = (DATA*)_tmp;
        }

        the_array[num_elements] = item;
        num_elements++;

        return num_elements;
}

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