Function sz_string_shrink_to_fit

include/stringzilla/small_string.h:369–395

}

SZ_PUBLIC sz_ptr_t sz_string_shrink_to_fit(sz_string_t *string, sz_memory_allocator_t *allocator) {

    sz_assert_(string && allocator && "Strings and allocators can't be SZ_NULL.");

    sz_ptr_t string_start;
    sz_size_t string_length;
    sz_size_t string_space;
    sz_bool_t string_is_external;
    sz_string_unpack(string, &string_start, &string_length, &string_space, &string_is_external);

    // We may already be space-optimal, and in that case we don't need to do anything.
    sz_size_t new_space = string_length + 1;
    if (string_space == new_space || !string_is_external) return string->external.start;

    sz_ptr_t new_start = (sz_ptr_t)allocator->allocate(new_space, allocator->handle);
    if (!new_start) return SZ_NULL_CHAR;

    sz_copy(new_start, string_start, string_length);
    string->external.start = new_start;
    string->external.space = new_space;
    string->external.padding = 0;
    string->external.length = string_length;

    // Deallocate the old string.
    if (string_is_external) allocator->free(string_start, string_space, allocator->handle);
    return string->external.start;
}

SZ_PUBLIC sz_ptr_t sz_string_expand( //
    sz_string_t *string, sz_size_t offset, sz_size_t added_length, sz_memory_allocator_t *allocator) {