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AVLtree is a small, malloc-based, in-memory index package generally
like B-trees and hash tables.
The interface resembles that of the BPLUS (B-tree) index package.
Index creation options are:
- fixed-length binary keys OR variable-length string keys
- unique OR duplicate keys
- with duplicate keys:
standard (void *) pointers for each key OR
instance-counting (saves time and memory)
Key insert/search time is O(log N). References:
Adelson-Velskii, G. M., and E. M. Landis.
"An Algorithm for the Organization of Information."
Soviet Math. Doclady 3, 1962, pp. 1259-1263.
Knuth, D. E.
The Art of Computer Programming, Volume 3: Sorting and Searching
(2nd printing). Addison-Wesley, 1975, pp. 451-468.
AVLtree was written by Gregory Tseytin
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