Bignum + rand()

ruby-talk
1

Is there a portable way to find out the biggest number I can pass to
rand() that doesn’t result in the following exception?

in `rand'(TestRMailHeader): bignum too big to convert
into `int' (RangeError)
2

Hi,

···

In message “Bignum + rand()” on 03/01/26, Matt Armstrong matt@lickey.com writes:

Is there a portable way to find out the biggest number I can pass to
rand() that doesn’t result in the following exception?

in rand'(TestRMailHeader): bignum too big to convert into int’ (RangeError)

rand() should work for any numbers. Could you tell me more info to
reproduce the exception?

						matz.
3

rand() should work for any numbers. Could you tell me more info to
reproduce the exception?

pigeon% ./ruby -ve 'p rand(9999999999999999999999999)'
ruby 1.8.0 (2003-01-20) [i686-linux]
-e:1:in `rand': bignum too big to convert into `int' (RangeError)
        from -e:1
pigeon%

rb_f_rand() has only the case T_FLOAT, T_NIL and default (NUM2LONG give
the error)

Guy Decoux

4

Hi,

···

In message “Re: Bignum + rand()” on 03/01/26, ts decoux@moulon.inra.fr writes:

rand() should work for any numbers. Could you tell me more info to
reproduce the exception?

pigeon% ./ruby -ve ‘p rand(9999999999999999999999999)’
ruby 1.8.0 (2003-01-20) [i686-linux]
-e:1:in rand': bignum too big to convert into int’ (RangeError)
from -e:1
pigeon%

rb_f_rand() has only the case T_FLOAT, T_NIL and default (NUM2LONG give
the error)

Oops, I somehow removed T_BIGNUM code from 1.8.0, I will fix.

						matz.