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| -rw-r--r-- | gnu/packages/crypto.scm | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gnu/packages/crypto.scm b/gnu/packages/crypto.scm index d3dbd28aac..08af95f8eb 100644 --- a/gnu/packages/crypto.scm +++ b/gnu/packages/crypto.scm @@ -1,5 +1,6 @@ ;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2014 David Thompson <davet@gnu.org> +;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net> ;;; ;;; This file is part of GNU Guix. ;;; @@ -42,3 +43,28 @@ communication, encryption, decryption, signatures, etc.") (license isc) (home-page "http://libsodium.org"))) + +(define-public sparsehash + (package + (name "sparsehash") + (version "2.0.3") + (source (origin + (method url-fetch) + (uri (string-append "https://github.com/sparsehash/sparsehash/" + "archive/sparsehash-" version ".tar.gz")) + (sha256 + (base32 + "133szz0ldwch0kd91l0sa57qsnl020njn622szd9cxrjqyjqds85")))) + (build-system gnu-build-system) + (synopsis "Memory-efficient hashtable implementations") + (description + "This library contains several hash-map implementations, similar in API +to SGI's @code{hash_map} class, but with different performance +characteristics. @code{sparse_hash_map} uses very little space overhead, 1-2 +bits per entry. @code{dense_hash_map} is very fast, particulary on lookup. +@code{sparse_hash_set} and @code{dense_hash_set} are the set versions of these +routines. All these implementation use a hashtable with internal quadratic +probing. This method is space-efficient -- there is no pointer overhead -- +and time-efficient for good hash functions.") + (home-page "https://github.com/sparsehash/sparsehash") + (license bsd-3))) |