Bitness/Bitness.ps1

#region Copyright & License

# Copyright © 2020 - 2020 François Chabot
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#endregion

Set-StrictMode -Version Latest

<#
.SYNOPSIS
    Ensures the current process is 32 bit.
.DESCRIPTION
    This command will throw if the current process is not a 32 bit process and will silently complete otherwise.
.EXAMPLE
    PS> Assert-32bitProcess
.EXAMPLE
    PS> Assert-32bitProcess -Verbose
    With the -Verbose switch, this command will confirm this process is 32 bit.
.NOTES
    © 2020 be.stateless.
#>

function Assert-32bitProcess {
    [CmdletBinding()]
    [OutputType([void])]
    param()

    Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState
    if (-not(Test-32bitProcess)) {
        throw "A 32 bit process is required to run this function!"
    }
    Write-Verbose -Message "Process is 32 bit."
}

<#
.SYNOPSIS
    Ensures the current process is 64 bit.
.DESCRIPTION
    This command will throw if the current process is not a 64 bit process and will silently complete otherwise.
.EXAMPLE
    PS> Assert-64bitProcess
.EXAMPLE
    PS> Assert-64bitProcess -Verbose
    With the -Verbose switch, this command will confirm this process is 64 bit.
.NOTES
    © 2020 be.stateless.
#>

function Assert-64bitProcess {
    [CmdletBinding()]
    [OutputType([void])]
    param()

    Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState
    if (-not(Test-64bitProcess)) {
        throw "A 64 bit process is required to run this function!"
    }
    Write-Verbose -Message "Process is 64 bit."
}

<#
.SYNOPSIS
    Returns whether the current operating system is 32 bit.
.DESCRIPTION
    This command will return $true if the current operating system is 32 bit, or $false otherwise.
.EXAMPLE
    PS> Test-32bitArchitecture
.NOTES
    © 2020 be.stateless.
#>

function Test-32bitArchitecture {
    [CmdletBinding()]
    [OutputType([bool])]
    param()

    Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState
    # https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/cim-processor
    [bool](Get-CimInstance -ClassName CIM_Processor | Where-Object AddressWidth -eq 32)
}

<#
.SYNOPSIS
    Returns whether the current process is 32 bit.
.DESCRIPTION
    This command will return $true if the current process is 32 bit, or $false otherwise.
.EXAMPLE
    PS> Test-32bitProcess
.NOTES
    © 2020 be.stateless.
#>

function Test-32bitProcess {
    [CmdletBinding()]
    [OutputType([bool])]
    param()

    # https://docs.microsoft.com/en-us/dotnet/api/system.intptr.size
    [System.IntPtr]::Size -eq 4
}

<#
.SYNOPSIS
    Returns whether the current operating system is 64 bit.
.DESCRIPTION
    This command will return $true if the current operating system is 64 bit, or $false otherwise.
.EXAMPLE
    PS> Test-64bitArchitecture
.NOTES
    © 2020 be.stateless.
#>

function Test-64bitArchitecture {
    [CmdletBinding()]
    [OutputType([bool])]
    param()

    Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState
    # https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/cim-processor
    [bool](Get-CimInstance -ClassName CIM_Processor | Where-Object AddressWidth -eq 64)
}

<#
.SYNOPSIS
    Returns whether the current process is 64 bit.
.DESCRIPTION
    This command will return $true if the current process is 64 bit, or $false otherwise.
.EXAMPLE
    PS> Test-64bitProcess
.NOTES
    © 2020 be.stateless.
#>

function Test-64bitProcess {
    [CmdletBinding()]
    [OutputType([bool])]
    param()

    # https://docs.microsoft.com/en-us/dotnet/api/system.intptr.size
    [System.IntPtr]::Size -eq 8
}

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