241/249: gnu: Add ghc-splitmix.

[guix-commits]

samplet pushed a commit to branch wip-haskell-updates
in repository guix.

commit 2c4733e4c072bc7e28e836b085381143bdb174b2
Author: Timothy Sample <address@hidden>
Date:   Thu Oct 31 22:59:23 2019 -0400

    gnu: Add ghc-splitmix.
    
    * gnu/packages/haskell-xyz.scm (ghc-splitmix): New variable.
    (ghc-splitmix-bootstrap): New variable.
---
 gnu/packages/haskell-xyz.scm | 45 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 22e9044..e42c32a 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -9361,6 +9361,51 @@ splitting lists into parts, akin to the @code{split} 
function found in several
 mainstream languages.")
     (license license:bsd-3)))
 
+(define-public ghc-splitmix
+  (package
+    (name "ghc-splitmix")
+    (version "0.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://hackage.haskell.org/package/";
+                           "splitmix/splitmix-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1k0amgkz7rvyz3lnw7m786ilnr1cibwhx9sc4qynq329gxan5r7w"))))
+    (build-system haskell-build-system)
+    (inputs
+     `(("ghc-random" ,ghc-random)))
+    (native-inputs
+     `(("ghc-hunit" ,ghc-hunit)
+       ("ghc-async" ,ghc-async)
+       ;("ghc-base-compat-batteries" ,ghc-base-compat-batteries)
+       ("ghc-tf-random" ,ghc-tf-random)
+       ("ghc-vector" ,ghc-vector)))
+    (home-page "http://hackage.haskell.org/package/splitmix";)
+    (synopsis "Fast and splittable pseudorandom number generator")
+    (description "This package provides a Pure Haskell implementation of the
+SplitMix pseudorandom number generator.  SplitMix is a ``splittable''
+pseudorandom number generator that is quite fast: 9 64-bit
+arithmetic/logical operations per 64 bits generated.  SplitMix is tested
+with two standard statistical test suites (DieHarder and TestU01, this
+implementation only using the former) and it appears to be adequate for
+``everyday'' use, such as Monte Carlo algorithms and randomized data
+structures where speed is important.  In particular, it @strong{should not
+be used for cryptographic or security applications}, because generated
+sequences of pseudorandom values are too predictable (the mixing functions
+are easily inverted, and two successive outputs suffice to reconstruct the
+internal state).")
+    (license license:bsd-3)))
+
+(define-public ghc-splitmix-bootstrap
+  (package
+    (inherit ghc-splitmix)
+    (name "ghc-splitmix-bootstrap")
+    (arguments `(#:tests? #f))
+    (native-inputs '())
+    (properties '((hidden? #t)))))
+
 (define-public ghc-statevar
   (package
     (name "ghc-statevar")