Print buffer

error_type process_buffer(BufferHandle* buffer, int nested) {
    string_type data = NULL;
    char* local_string = NULL;
    size_type size = 0;
    size_type print_size = 0;
    unsigned long long size_converted = 0;

    print_spaces(nested);
    printf("Buffer begin\n");

    RETURN_ERROR_IF_NOT_SUCCESS(Buffer_GetData(buffer, &data, &size));

    if (size >= SIZE_MAX) {
        unsigned long long size_long_long = size;
        printf("Buffer size is too big: %llu bytes\n", size_long_long);
        return VANILLAPDF_TEST_ERROR_FAILURE;
    }

    print_size = size > 20 ? 10 : size;
    size_converted = size;

    local_string = (char*) calloc(sizeof(char), print_size + 1);
    if (NULL == local_string) {
        unsigned long long print_size_converted = print_size;
        printf("Could not allocate memory: %llu bytes\n", print_size_converted + 1);
        return VANILLAPDF_TEST_ERROR_FAILURE;
    }

    memcpy(local_string, data, print_size);

    print_spaces(nested + 1);
    printf("Size: %llu\n", size_converted);
    print_spaces(nested + 1);
    printf("Data: %s\n", local_string);

    free(local_string);

    print_spaces(nested);
    printf("Buffer end\n");

    return VANILLAPDF_TEST_ERROR_SUCCESS;
}