Belin.Cli

5.0.1

src/Diagnostics/Get-ExecutableArchitecture.psm1

using namespace System.IO
using module ./Architecture.psm1

<#
.SYNOPSIS
    Gets the architecture of the specified Windows executable.
.INPUTS
    The path of the executable to inspect.
.OUTPUTS
    The architecture of the specified Windows executable.
#>
function Get-ExecutableArchitecture {
    [CmdletBinding()]
    [OutputType([Architecture])]
    param (
        # The path of the executable to inspect.
        [Parameter(Mandatory, Position = 0, ValueFromPipeline)]
        [ValidateScript({ Test-Path $_ -PathType Leaf }, ErrorMessage = "The specified file does not exist.")]
        [string] $Path
    )

    begin {
        if (-not $IsWindows) { throw [PlatformNotSupportedException] "This command only supports the Windows platform." }
    }

    process {
        $stream = [File]::OpenRead($Path)
        $reader = [BinaryReader] $stream

        try {
            $stream.Seek(0x3C, [SeekOrigin]::Begin) | Out-Null
            $stream.Seek($reader.ReadInt32() + 4, [SeekOrigin]::Begin) | Out-Null
            switch ($reader.ReadUInt16()) {
                0x014C { return [Architecture]::x86 }
                0x8664 { return [Architecture]::x64 }
                default { throw [NotSupportedException] "Unsupported machine type: 0x{0:X4}" -f $_ }
            }
        }
        finally {
            $reader.Close()
            $stream.Close()
        }
    }
}