diff options
Diffstat (limited to 'lib/crypto/src/crypto.erl')
| -rw-r--r-- | lib/crypto/src/crypto.erl | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl index c35dfcebab..c3e13d6b91 100644 --- a/lib/crypto/src/crypto.erl +++ b/lib/crypto/src/crypto.erl @@ -415,6 +415,13 @@ rand_uniform(From,To) when is_binary(From), is_binary(To) -> Whatever end; rand_uniform(From,To) when is_integer(From),is_integer(To) -> + if From < 0 -> + rand_uniform_pos(0, To - From) + From; + true -> + rand_uniform_pos(From, To) + end. + +rand_uniform_pos(From,To) when From < To -> BinFrom = mpint(From), BinTo = mpint(To), case rand_uniform(BinFrom, BinTo) of @@ -422,7 +429,9 @@ rand_uniform(From,To) when is_integer(From),is_integer(To) -> erlint(Result); Other -> Other - end. + end; +rand_uniform_pos(_,_) -> + error(badarg). rand_uniform_nif(_From,_To) -> ?nif_stub. |