I often have to do conversions between decimal, hex and binary so I decided I wanted some functions to do this for me
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#Requires -version 2.0 ## ## Author Richard Siddaway ## Version 0.1 – Inital Release May 2009 ###############################################
function Convert-ToHex{
[CmdletBinding()]
param (
[Parameter(ValueFromPipeline=$true)]
[int64]$inputvalue =0
)
[convert]::ToString($inputvalue,16)
}
function Convert-ToBinary{
[CmdletBinding()]
param (
[Parameter(ValueFromPipeline=$true)]
[int64]$inputvalue =0
)
[convert]::ToString($inputvalue,2)
}
function Convert-ToDecimal{
[CmdletBinding()]
param (
[Parameter(ValueFromPipeline=$true)]
[string]$inputvalue,
[Parameter(ParameterSetName="Binary")]
[switch]$binary,
[Parameter(ParameterSetName="Hex")]
[switch]$hex
)
$chars = $inputvalue.Trim().ToCharArray()
switch ($psCmdlet.ParameterSetName) {
Binary {
foreach ($char in $chars){
if (-not($char -match ‘0|1’)){
Throw "$inputvalue is not a valid binary number"
}
}
$ret = [convert]::ToInt64($inputvalue.Trim(),2)
break
}
Hex {
foreach ($char in $chars){
if (-not($char -match ‘[0-9]’ -or $char -match ‘[A-F]’)){
Throw "$inputvalue is not a valid hex number"
}
}
$ret = [convert]::ToInt64($inputvalue.Trim(),16)
break
}
}
return $ret
}
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Three simple functions to perform the conversions.
In the convert-todecimal I check that the input string is correct for binary or hex respectively before performing the conversion. It returns a int64 but that is easy to convert to int32 if required
[int]$i32 = Convert-ToDecimal -inputvalue "FFFFFF" -hex
Use the functions like this
Convert-ToBinary 255
Convert-ToHex 255
Convert-ToDecimal -inputvalue "ff" -hex
Convert-ToDecimal -inputvalue "11111111" –binary
or even
Convert-ToHex -inputvalue (Convert-ToDecimal -inputvalue "11111111" -binary)
though this is messy so I’m going to create direct hex <-> binary conversion routines
Error trapping stops false conversions
PS> Convert-ToDecimal -inputvalue " 111b1111 " -binary
111b1111 is not a valid binary number
At C:\Scripts\Modules\pammath\pammath.psm1:42 char:34
+ Throw <<<< "$inputvalue is not a valid binary number"
+ CategoryInfo : OperationStopped: ( 111b1111 is not a valid binary number:String) [], RuntimeException
+ FullyQualifiedErrorId : 111b1111 is not a valid binary number
PS> Convert-ToDecimal -inputvalue "ffg" -hex
ffg is not a valid hex number
At C:\Scripts\Modules\pammath\pammath.psm1:52 char:34
+ Throw <<<< "$inputvalue is not a valid hex number"
+ CategoryInfo : OperationStopped: (ffg is not a valid hex number:String) [], RuntimeException
+ FullyQualifiedErrorId : ffg is not a valid hex number
When I’ve finished the direct hex <-> binary conversions this will be the second module on PSAM. I’ll add some functions to do simple arithmetic in hex and binary as well
