private/Test-VersionPattern.ps1
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function Test-VersionPattern { <# .SYNOPSIS This function parses some of Lenovos conventions for expressing version requirements and does the comparison. Returns 0, -1 or -2. .PARAMETER LenovoStringFormat Force the LenovoString input to be interpreted as decimal or hexadecimal. The default setting, Auto, assumes decimal first but falls back to hexadecimal if the number isn't valid in decimal. .PARAMETER SystemStringFormat Force the SystemString input to be interpreted as decimal or hexadecimal. The default setting, Auto, assumes decimal first but falls back to hexadecimal if the number isn't valid in decimal. #> [CmdletBinding()] [OutputType('System.Int32')] Param ( [ValidateNotNullOrEmpty()] [string]$LenovoString, [ValidateSet('Auto', 'Dec', 'Hex')] [string]$LenovoStringFormat = 'Auto', [ValidateNotNullOrEmpty()] [string]$SystemString, [ValidateSet('Auto', 'Dec', 'Hex')] [string]$SystemStringFormat = 'Auto' ) [string]$SystemStringDec = '' [string]$GreaterOrEqual = '' [string]$LessOrEqual = '' [string]$ExactlyEqual = '' # Lenovo version can sometimes contains spaces, like in package r07iw22w_8260 $LenovoStringSanitized = $LenovoString.Replace(' ', '') [bool]$LenovoStringIsParsableDec = $LenovoStringSanitized -match "^[\d\.]*\^?[\d\.]*$" [bool]$LenovoStringIsParsableHex = $LenovoStringSanitized -match '^[\da-f]*\^?[\da-f]*$' if ($LenovoStringIsParsableDec -and $LenovoStringFormat -ne 'Hex') { # Lenovo string can contain the additional directive ^-symbol if ($LenovoStringSanitized.Contains('^')) { $GreaterOrEqual, $LessOrEqual = $LenovoStringSanitized.Split('^') } else { $ExactlyEqual = $LenovoStringSanitized } } elseif ($LenovoStringIsParsableHex -and $LenovoStringFormat -ne 'Dec') { if ($LenovoStringSanitized.Contains('^')) { try { $GreaterOrEqual, $LessOrEqual = $LenovoStringSanitized.Split('^') | ForEach-Object { if ($_) { [Convert]::ToUInt32($_, 16) } else { '' } } } catch { Write-Verbose "Got unsupported hex version format from Lenovo: '$LenovoString' ($_)" return -2 } } else { $ExactlyEqual = [Convert]::ToUInt32($LenovoStringSanitized, 16) } } else { # Unknown character in version string, cannot continue Write-Verbose "Got unsupported version format from Lenovo: '$LenovoString'" return -2 } [bool]$SystemStringIsParsableDec = $SystemString -match "^[\d\.]+$" [bool]$SystemStringIsParsableHex = $SystemString -match '^[\da-f]+$' if ($SystemStringIsParsableDec -and $SystemStringFormat -ne 'Hex') { $SystemStringDec = $SystemString } elseif ($SystemStringIsParsableHex -and $SystemStringFormat -ne 'Dec') { $SystemStringDec = [Convert]::ToUInt32($SystemString, 16) } else { Write-Verbose "Got unsupported version format from OS: '$SystemString'" return -2 } # Exact match test if ($ExactlyEqual) { if ((Compare-Version -ReferenceVersion $SystemStringDec.Split('.') -DifferenceVersion $ExactlyEqual.Split('.')) -ne 0) { return -1 } } # Greater than, Less than, or within range (if both combined) tests if ($LessOrEqual) { # System version must be less or equal if ((Compare-Version -ReferenceVersion $SystemStringDec.Split('.') -DifferenceVersion $LessOrEqual.Split('.')) -notin 0,2) { return -1 } } if ($GreaterOrEqual) { # System version must be equal or higher than if ((Compare-Version -ReferenceVersion $SystemStringDec.Split('.') -DifferenceVersion $GreaterOrEqual.Split('.')) -notin 0,1) { return -1 } } return 0 # SUCCESS, SystemVersion meets version pattern criteria } |