# HG changeset patch
# User Steve Losh <steve@stevelosh.com>
# Date 1486862083 0
# Node ID 7781bd17fcdc6f9c5462d5f9f32d03686f9be392
# Parent  c6a3ab353556d8a36d17019b89d0dbedec17b0b3
Add a ros file for testing with dieharder

diff -r c6a3ab353556 -r 7781bd17fcdc .hgignore
--- a/.hgignore	Fri Feb 10 23:31:25 2017 +0000
+++ b/.hgignore	Sun Feb 12 01:14:43 2017 +0000
@@ -2,3 +2,4 @@
 
 scratch.lisp
 docs/build
+build/pcg
diff -r c6a3ab353556 -r 7781bd17fcdc Makefile
--- a/Makefile	Fri Feb 10 23:31:25 2017 +0000
+++ b/Makefile	Sun Feb 12 01:14:43 2017 +0000
@@ -25,3 +25,9 @@
 	rsync --delete -a ./docs/build/ ~/src/sjl.bitbucket.org/cl-pcg
 	hg -R ~/src/sjl.bitbucket.org commit -Am 'cl-pcg: Update site.'
 	hg -R ~/src/sjl.bitbucket.org push
+
+# Build -----------------------------------------------------------------------
+lisps := $(shell ffind '\.(asd|lisp|ros)$$')
+
+build/pcg: $(lisps)
+	ros build build/pcg.ros
diff -r c6a3ab353556 -r 7781bd17fcdc README.markdown
--- a/README.markdown	Fri Feb 10 23:31:25 2017 +0000
+++ b/README.markdown	Sun Feb 12 01:14:43 2017 +0000
@@ -7,3 +7,18 @@
 * **Documentation:** <https://sjl.bitbucket.io/cl-pcg/>
 * **Mercurial:** <https://bitbucket.org/sjl/cl-pcg/>
 * **Git:** <https://github.com/sjl/cl-pcg/>
+
+
+Testing with Dieharder
+----------------------
+
+There's a Roswell script you can use to make a little executable that will spew
+random bytes to stdout, suitable for piping into `dieharder`:
+
+```
+make build/pcg
+./build/pcg | dieharder -a -g 200
+```
+
+`build/pcg` will dump out infinite random bytes until stdout breaks, so maybe
+don't run it in a bare terminal unless you want to just totally hose it. 
diff -r c6a3ab353556 -r 7781bd17fcdc build/pcg.ros
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pcg.ros	Sun Feb 12 01:14:43 2017 +0000
@@ -0,0 +1,61 @@
+#!/bin/sh
+#|-*- mode:lisp -*-|#
+#|
+exec ros -Q -- $0 "$@"
+|#
+
+
+(unless (find-package :pcg)
+  (ql:quickload '(:cl-pcg) :silent t))
+
+(require 'sb-rotate-byte)
+
+(declaim (optimize (debug 0) (safety 0) (speed 3)))
+
+(let ((*standard-output* (make-broadcast-stream)) ; shut
+      (*error-output* (make-broadcast-stream))) ; up
+  (asdf:load-system 'cl-pcg :force t))
+
+
+(deftype u32 () '(unsigned-byte 32))
+(defconstant +buffer-size+ (* 1 1024))
+
+(defun pcg-dump-data ()
+  (with-open-file (out "/dev/stdout"
+                       :direction :output
+                       :if-exists :append
+                       :element-type 'u32)
+    (loop
+      :with pcg = (pcg::make-pcg :seed (random (expt 2 32)) :stream-id 0)
+      :with buffer = (make-array +buffer-size+
+                       :element-type t
+                       :initial-element 0)
+      :do (loop :for i :from 0 :below +buffer-size+
+                :for n = (pcg::pcg-random% pcg)
+                :do (setf (aref buffer i) n))
+      (write-sequence buffer out))))
+
+(defun random-dump-data ()
+  (with-open-file (out "/dev/stdout"
+                       :direction :output
+                       :if-exists :append
+                       :element-type 'u32)
+    (loop
+      :with rs = (make-random-state t)
+      :with buffer = (make-array +buffer-size+
+                       :element-type 'u32
+                       :initial-element 0)
+      :do (loop :for i :from 0 :below +buffer-size+
+                :for n = (random (expt 2 32) rs)
+                :do (setf (aref buffer i) n))
+      (write-sequence buffer out))))
+
+(defun main (&optional generator &rest argv)
+  (declare (ignore argv))
+  (setf *random-state* (make-random-state t))
+  (handler-case
+      (if (string= generator "random")
+        (random-dump-data)
+        (pcg-dump-data))
+    (stream-error () t))
+  t)
diff -r c6a3ab353556 -r 7781bd17fcdc src/pcg.lisp
--- a/src/pcg.lisp	Fri Feb 10 23:31:25 2017 +0000
+++ b/src/pcg.lisp	Sun Feb 12 01:14:43 2017 +0000
@@ -20,10 +20,7 @@
                   :collect `(check-type ,place ,type))))
 
 
-;; Embedded from cl-utilities, with the bugfix of putting the inline declamation
-;; FIRST so it'll actually work.
-(declaim (inline rotate-byte))
-(defun rotate-byte% (count bytespec integer)
+(defun rotate-byte (count bytespec integer)
   "Rotates a field of bits within INTEGER; specifically, returns an
 integer that contains the bits of INTEGER rotated COUNT times
 leftwards within the byte specified by BYTESPEC, and elsewhere
@@ -31,7 +28,7 @@
   (declare (optimize (speed 3) (safety 0) (space 0) (debug 1)))
   (let ((size (byte-size bytespec)))
     (when (= size 0)
-      (return-from rotate-byte% integer))
+      (return-from rotate-byte integer))
     (let ((count (mod count size)))
       (flet ((rotate-byte-from-0 (count size integer)
                  (let ((bytespec (byte size 0)))
@@ -44,12 +41,6 @@
              bytespec
              integer)))))
 
-(defun-inline rotate-byte (count bytespec integer)
-  #+sbcl
-  (sb-rotate-byte:rotate-byte count bytespec integer)
-  #-sbcl
-  (rotate-byte% count bytespec integer))
-
 
 (defun-inline % (n)
   (mod n +modulus+))
@@ -114,7 +105,8 @@
   (declare (optimize speed)
            (type (unsigned-byte 32) data)
            (type (unsigned-byte 5) selector))
-  (rotate-byte selector (byte 32 0) data))
+  #+sbcl (sb-rotate-byte:rotate-byte selector (byte 32 0) data)
+  #-sbcl (rotate-byte selector (byte 32 0) data))
 
 
 ;;;; State Advancement --------------------------------------------------------