Hex Subtraction
Again this takes the pattern from the binary function and adapts it to work with hex
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| ## this will always subtract value2 from value1
function Get-HexDifference {
param(
[string]$inputvalue1,
[string]$inputvalue2
)
## check valid hex numbers
Test-Hex $inputvalue1
Test-Hex $inputvalue2
$diff = (ConvertTo-Decimal -inputvalue $inputvalue1 -hex) `
- (ConvertTo-Decimal -inputvalue $inputvalue2 -hex)
if ($diff -lt 0){Throw "Hex subtraction produces negative number"}
else {ConvertTo-Hex -inputvalue $diff}
} |
As with the binary subtraction function we test to see if we’ve gone negative – if so reject the value.
That’s the end of the math module for now. As soon as I’ve done the help files I’ll post it on codeplex.