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| author |  Jason Evans <jasone@canonware.com> | 2010-08-09 17:17:34 -0500 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2010-08-14 19:35:37 -0700 |
| commit | 951f316470acc7c785c460a4e40735b22822349f (patch) | |
| tree | 8cc846b9eead64502e00fc4064d5decfa1897320 /.gitignore | |
| parent | Add memory pool library (diff) | |
| download | tgif-951f316470acc7c785c460a4e40735b22822349f.tar.xz | |
Add treap implementation
Provide macros to generate a type-specific treap implementation and
various functions to operate on it. It uses obj_pool.h to store memory
nodes in a treap. Previously committed nodes are never removed from
the pool; after any *_commit operation, it is assumed (correctly, in
the case of svn-fast-export) that someone else must care about them.
Treaps provide a memory-efficient binary search tree structure.
Insertion/deletion/search are about as about as fast in the average
case as red-black trees and the chances of worst-case behavior are
vanishingly small, thanks to (pseudo-)randomness. The bad worst-case
behavior is a small price to pay, given that treaps are much simpler
to implement.
>From http://www.canonware.com/download/trp/trp_hash/trp.h
[db: Altered to reference nodes by offset from a common base pointer]
[db: Bob Jenkins' hashing implementation dropped for Knuth's]
[db: Methods unnecessary for search and insert dropped]
[rr: Squelched compiler warnings]
[db: Added support for immutable treap nodes]
[jn: Reintroduced treap_nsearch(); with tests]
Signed-off-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to '.gitignore')
| -rw-r--r-- | .gitignore | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore index 1e64a6a138..af47653fed 100644 --- a/.gitignore +++ b/.gitignore @@ -173,6 +173,7 @@ /test-run-command /test-sha1 /test-sigchain +/test-treap /common-cmds.h *.tar.gz *.dsc |