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2017-09-18Merge commit '3d6a68727182c05fbbef9ad9e694f2e79b6731de' into maintRaimo Niskanen
* commit '3d6a68727182c05fbbef9ad9e694f2e79b6731de': Update link text to algorithms homepage
2017-09-14Update link text to algorithms homepageRaimo Niskanen
2017-07-10Fix typo in rand.xml: superseeded -> supersededLoïc Hoguin
2017-04-21Merge branch 'rand/arbitrary_normal_distributions'Raimo Niskanen
* rand/arbitrary_normal_distributions: rand: Support arbitrary normal distributions Conflicts: lib/stdlib/test/rand_SUITE.erl
2017-04-21Implement Xoroshiro116+ and improve statisticalsRaimo Niskanen
Implement Xoroshiro116+ as 'exrop' with fixes. Deprecate all old algorithms but reincarnate 'exs1024' as 'exs1024s' and 'exsplus' as 'exsp' with fixes. Fixes: * Avoid skew for uniform integers caused by using a simple 'rem' operation for range confinement. Correctness requires retry with new random value for an unfortunate first value. * Implement a correct algorithm that collects enough random bits for ranges larger than the generator's precision. * Fix uniform density for floats by acquiring 53 bits then multiplying with 2.0^(-53) which produces floats on the form N * 2.0^(-53).
2017-04-20rand: Support arbitrary normal distributionsGuilherme Andrade
2017-04-04Clean up documentation and test casesRaimo Niskanen
2017-03-18Support cryptographically strong rand pluginGuilherme Andrade
2016-12-07Merge branch 'maint'Dan Gudmundsson
* maint: Update copyright-year Conflicts: lib/dialyzer/src/dialyzer.hrl lib/dialyzer/src/dialyzer_options.erl lib/dialyzer/test/opaque_SUITE_data/src/recrec/dialyzer.hrl lib/dialyzer/test/opaque_SUITE_data/src/recrec/dialyzer_races.erl lib/hipe/icode/hipe_icode.erl lib/hipe/main/hipe.erl lib/hipe/main/hipe.hrl.src lib/hipe/main/hipe_main.erl
2016-12-07Update copyright-yearErlang/OTP
2016-11-14Add jump functions to rand moduleKenji Rikitake
Jump functions returns the state after performing jump calculation to a rand module internal state, which is equivalent to perform a large number of calls of calculating new states for XorShift*/+ algorithms. This commit add jump functions for exsplus and exs1024 algorithms, and a wrapper function jump/1. The wrapper function will cause error with reason "not_implemented" if the jump function for the algorithm is not implemented. This commit adds following new functionalities: - Add new functions rand:jump/0 and rand:jump/1 - Add the member jump to type alg_handler(), a fun for performing the jump function - Add jump functions for exsplus, equivalent to 2^64 calls - Add jump functions for exs1024, equivalent to 2^512 calls - Revise seed_put/1, seed/1, seed/2 See <https://github.com/erlang/otp/pull/1235#discussion_r86950557> - Add dummy jump function for exs64 calling erlang:error(not_implemented) - Add jump function test cases as follows: * Add Common Test group reference_jump * Add tests for jump/0 to reference_jump_procdict/1 * Rename tests for jump/1 to reference_jump_state/1 * Rename gen_jump/1 to gen_jump_1/1 * Add Common Tests reference_jump_procdict and reference_jump_state to the group reference_jump - Add jump function documentation This commit also changes the Copyright year for Kenji Rikitake's code from 2015 to 2015-2016.
2016-06-13Update STDLIB documentationBjörn Gustavsson
Language cleaned up by the technical writers xsipewe and tmanevik from Combitech. Proofreading and corrections by Björn Gustavsson and Hans Bolinder.
2015-11-06Recommend against using crypto:rand_bytesDavid Whitlock
2015-06-18Change license text to APLv2Bruce Yinhe
2015-04-30stdlib: Document and add normal distributed random value functionDan Gudmundsson
It is needed in various tests. It uses the Ziggurat algorithm, which is the fastest that I know.