diff options
Diffstat (limited to 'lib/stdlib/src/rand.erl')
| -rw-r--r-- | lib/stdlib/src/rand.erl | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl index 8e8d0bc801..d455abf7b0 100644 --- a/lib/stdlib/src/rand.erl +++ b/lib/stdlib/src/rand.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2015. All Rights Reserved. +%% Copyright Ericsson AB 2015-2016. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -63,7 +63,7 @@ %% Return algorithm and seed so that RNG state can be recreated with seed/1 -spec export_seed() -> undefined | export_state(). export_seed() -> - case seed_get() of + case get(?SEED_DICT) of {#{type:=Alg}, Seed} -> {Alg, Seed}; _ -> undefined end. @@ -256,6 +256,8 @@ exs64_uniform(Max, {Alg, R}) -> %% ===================================================================== -type exsplus_state() :: nonempty_improper_list(uint58(), uint58()). +-dialyzer({no_improper_lists, exsplus_seed/1}). + exsplus_seed({A1, A2, A3}) -> {_, R1} = exsplus_next([(((A1 * 4294967197) + 1) band ?UINT58MASK)| (((A2 * 4294967231) + 1) band ?UINT58MASK)]), @@ -263,6 +265,8 @@ exsplus_seed({A1, A2, A3}) -> tl(R1)]), R2. +-dialyzer({no_improper_lists, exsplus_next/1}). + %% Advance xorshift116+ state for one step and generate 58bit unsigned integer -spec exsplus_next(exsplus_state()) -> {uint58(), exsplus_state()}. exsplus_next([S1|S0]) -> |