Dictionary restrictions

Set up the compression dictionary so that:

• The algorithm does not create a compression symbol that represents a string of more than 260 characters.
• No character entry has more than 260 total children, including all sibling descriptors for that character entry.
• No character entry has a child count greater than 6.
• No character entry has more than 4 additional extension characters when there are 0 or 1 child characters.
• No sibling descriptor indicates 0 sibling characters.

Set up the expansion dictionary so that:

• Expansion of a compression symbol does not use more than 127 dictionary entries.