C# RegEx - FlagSet check in integer

[Guest]

Is it possible to find if lower 1st bit and 2nd bit in an 32-bit integer is set using regular expression in C#

Example

1. Input Strings - 0, 1, 2 Result - Fai
2. Input Strings - 3, 7, Result - Fail

 

[Justin Rogers]

AFAIK regular expressions don't have the ability to crack integers into
constituent components.
In other words there is no matching group that lets you specify bits, only
matching groups that let
you specify certain digits or strings of digits. Digits are represented as
character groups even, so
really you can only specify a string of characters that has the same matching
group as the characters
that represent numbers.


--
Justin Rogers
DigiTec Web Consultants, LLC.
Blog: http://weblogs.asp.net/justin_rogers

Is it possible to find if lower 1st bit and 2nd bit in an 32-bit integer is

set using regular expression in C# ?

 

[Troy Jezeski]

I don't know the specifics of your need, but it would probably be easier to
do this check with an AND bit mask.

For example:
// Check the lower 2 bits
if((((i & 0x00000003) > 0) && (i & 0x00000003) < 4))
{
MessageBox.Show("One or both of the lower 2 bits is set");
}// where i is a System.Int32

Is it possible to find if lower 1st bit and 2nd bit in an 32-bit integer

is set using regular expression in C# ?