public Item split (int split_index, int split_offset)

Modifies this to cover only the text after split_index, and returns a new item that covers the text before split_index that used to be in this.

You can think of split_index as the length of the returned item. split_index may not be 0, and it may not be greater than or equal to the length of this (that is, there must be at least one byte assigned to each item, you can't create a zero-length item). split_offset is the length of the first item in chars, and must be provided because the text used to generate the item isn't available, so split can't count the char length of the split items itself.



a Item


byte index of position to split item, relative to the start of the item


number of chars between start of this and split_index


new item representing text before split_index, which should be freed with free.