cust1/rmAllResistors.tcl

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###############################################################################
# Copyright (c) 2003-2024 by Altair Engineering, Inc.
# All rights reserved.
#
# Altair Engineering, Inc. makes this software available as part of the Vision
# tool platform.  As long as you are a licensee of the Vision tool platform
# you may make copies of the software and modify it to be used within the
# Vision tool platform, but you must include all of this notice on any copy.
# Redistribution without written permission to any third party, with or
# without modification, is not permitted.
# Altair Engineering, Inc. does not warrant that this software is error free
# or fit for any purpose.  Altair Engineering, Inc. disclaims any liability for
# all claims, expenses, losses, damages and costs any user may incur as a
# result of using, copying or modifying the software.
# =============================================================================
#   @userware
#       Remove All Resistors
#   @section
#       Modify the Loaded Database
#   @description
#       Traverse the database and remove all resistors.
#   @files
#       cust1/rmAllResistors.tcl
#   @example
#       demo/spice/amd2901.sp
#   @cmdline
#       -hspice @example[0]
#       -userware @files[0]
#   @tag
#       spice parasitic dspf spf
###############################################################################


# -----------------------------------------------------------------------------
# _rmAllResistors - Remove all resistors from design.
# -----------------------------------------------------------------------------
#
proc _rmAllResistors {db} {
    gui database removeChangedCallback _rmAllResistors

    $db foreach module m {
        $db foreach inst $m inst {
            if {[$db isModule $inst]} {
                continue
            }
            if { "RES" != [$db primFuncOf $inst] } {
                continue
            }

            $db flag $inst set zombie

            ##
            # get nets connecting on both sides
            #
            set netList {}
            $db foreach pin $inst pin {
                if {![$db isConnected $pin]} {
                    continue
                }
                set net [$db connectedNet $pin]
                if {[$db flag $net is zombie]} {
                    return -code error "internal error: $net with zombie flag"
                }
                lappend netList $net
            }
            if {[llength $netList] == 2} {
                ##
                # both sides are actually connected...
                # merge net[1] into net[0] and flag net[1] to be deleted later.
                #
                set from [lindex $netList 1]
                set to   [lindex $netList 0]
                if {$to == $from} {
                    continue
                }

                $db oper mergeNet $to $from
                $db flag $from set zombie
            }
        }
    }
    $db deleteZombies
    gui database changed $db
}


##
# Use gui database runOrRegisterChangedCallback to immediately run _setup
# if we have a database, or otherwise register the proc to be executed after
# the database is available.
#
gui database runOrRegisterChangedCallback _rmAllResistors