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libdieharder(3) DragonFly Library Functions Manual libdieharder(3)
libdieharder - A testing and benchmarking library for random number
* Create the test
* Set any GLOBAL data used by the test.
user_template_lag = (int)x_user;
* Show the standard test header
* Call the test
* This almost certainly belongs in the show_test_results section,
* possibly with additional conditionals rejecting test results
* rewinds, period.
printf( # %u rands were used in this
printf( # The file %s was rewound %u
* Show standard test results
The libdieharder library provides an API to user interface programs
wishing to call dieharder tests. Commands are defined for creating
tests, initializing the tests and running the tests. Showing the
results is of course the responsibility of the UI.
libdieharder also wraps certain additional random number generators so
that they can be tested. libdieharder can be default test all the
random number generators in the Gnu Scientific Library plus these
additional generators (which include "generators" for reading in
numbers from a file).
libdieharder is extensible. It is fairly easy to add additional test
"objects" or random number generators using existing sources as
The API will be documented in more detail as the project approaches
completion. In the meantime, it is strongly recommended that users
wishing to call the library use the source of the dieharder tty UI as a
template and list of all currently supported objects, as this is the
primary libdieharder debugging vehicle in addition to being the current
"standard" application of the library.
libdieharder is entirely original code and can be modified and used at
will by any user, provided that:
a) The original copyright notices are maintained and that the source,
including all modifications, is made publically available at the time
of any derived publication. This is open source software according to
the precepts and spirit of the Gnu Public License. See the
accompanying file COPYING, which also must accompany any
b) The author of the code (Robert G. Brown) is appropriately
acknowledged and referenced in any derived publication. It is strongly
suggested that George Marsaglia and the Diehard suite and the various
authors of the Statistical Test Suite be similarly acknowledged,
although this suite shares no actual code with these random number test
c) Full responsibility for the accuracy, suitability, and
effectiveness of the program rests with the users and/or modifiers. As
is clearly stated in the accompanying copyright.h:
THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
The author of this suite gratefully acknowledges George Marsaglia (the
author of the diehard test suite) and the various authors of NIST
Special Publication 800-22 (which describes the Statistical Test Suite
for testing pseudorandom number generators for cryptographic
applications), for excellent descriptions of the tests therein. These
descriptions enabled this suite to be developed with a clean copyright,
licensable under the GPL.
The author also wishes to reiterate that the academic correctness and
accuracy of the implementation of these tests is his sole
responsibility and not that of the authors of the Diehard or STS
suites. This is especially true where he has seen fit to modify those
tests from their strict original descriptions.
GPL 2b; see the file COPYING that accompanies the source of this
program. This is the "standard Gnu General Public License version 2 or
any later version", with the one minor (humorous) "Beverage"
modification listed below. Note that this modification is probably not
legally defensible and can be followed really pretty much according to
the honor rule.
As to my personal preferences in beverages, red wine is great, beer is
delightful, and Coca Cola or coffee or tea or even milk acceptable to
those who for religious or personal reasons wish to avoid stressing my
The Beverage Modification to the GPL:
Any satisfied user of this software shall, upon meeting the primary
author(s) of this software for the first time under the appropriate
circumstances, offer to buy him or her or them a beverage. This
beverage may or may not be alcoholic, depending on the personal ethical
and moral views of the offerer. The beverage cost need not exceed one
U.S. dollar (although it certainly may at the whim of the offerer:-)
and may be accepted or declined with no further obligation on the part
of the offerer. It is not necessary to repeat the offer after the
first meeting, but it can't hurt...
libdieharder Copyright 2006 Robert G. Brown libdieharder(3)