added maglef files
diff --git a/utils/magicDrc b/utils/magicDrc
new file mode 100755
index 0000000..94b0b7b
--- /dev/null
+++ b/utils/magicDrc
@@ -0,0 +1,873 @@
+#!/bin/bash
+# Copyright (C) 2015, 2020 efabless Corporation. All Rights Reserved.
+# filter out most options, so magic Natively sees/handles *only* -T <file>.
+# for-bash\
+  declare -a C ; declare -a N ; export _CE= _NE= _M0=           ;\
+  for i in "$@" ; do _M0="$_M0${_M0:+ }\"${i//\"/\\\"}\""; done ;\
+  while getopts "NFT:S:l:P:" o; do                      \
+    : echo got "optchar $o, with optarg $OPTARG" ;\
+    case "$o" in S)                               \
+      C+=(-${o} "$OPTARG")                       ;\
+       continue ; esac                           ;\
+    case "$o" in P)                               \
+      C+=(-${o} "$OPTARG")                       ;\
+       continue ; esac                           ;\
+    case "$o" in F|N)                             \
+      C+=(-${o})                                 ;\
+       continue ; esac                           ;\
+    case "$o" in l)                               \
+      C+=(-${o} "$OPTARG")                       ;\
+       continue ; esac                           ;\
+    case "$o" in T)                               \
+      N+=(-${o} "$OPTARG")                       ;\
+       continue ; esac                           ;\
+  done                ;\
+  shift $((OPTIND-1)) ;\
+  for i in "${C[@]}" ; do _CE="$_CE${_CE:+ }\"${i//\"/\\\"}\""; done ;\
+  for i in "${N[@]}" ; do _NE="$_NE${_NE:+ }\"${i//\"/\\\"}\""; done ;\
+  exec magic -dnull -noconsole "${N[@]}" <"$0"
+# for-magic:
+# magicDrc: run magic-DRC in batch on a .mag file, tabulate/pareto the error counts.
+#
+# magicDrc [-T <techfilePath>] [-S <drcStyleName>] [-P <N> ] [-l FILE_NAME] <magFileName>
+#  -T name specific techfile (def .tech extension), passed to magic itself only, overrides tech implied by magFileName
+#  -S if given, changes from techfile's default drc style (perhaps "drc(fast)") to named style, for example: -S "drc(full)"
+#  -l if given, enumerates EVERY individual error bbox to the FILE_NAME
+#  -N if given, do Not use -dereference option of load for topcell (not available in older magics)
+#  -F flatten top cell in-memory only, not saved (experimental)
+#  -P do crude drc performance measurement. At top-cell, do 'drc find' <N> times and report time per call.
+#   Stdout will log a pareto of error type by count regardless.
+#
+# <magFileName>: names a .mag file, the toplevel of the hier. to DRC/pareto
+#
+# Normal magic init. files are STILL sourced: ~/.magicrc and either $CWD/.magicrc or $CWD/magic_setup.
+# (This would NOT happen if -rcfile magic cmd-line option were used).
+#
+# WARNING: Before 8.1.70, *.mag on cmd-line that was only found in cell search path set by .magicrc inits,
+# would FAIL to determine the default tech-file.
+#
+# rb@ef 2015-06-30 author
+# rb 2020-03-11 embed some library functions, to standalone from efabless-opengalaxy env, test via magic-8.2.194
+#
+# magic itself outputs following usage message though -rcfile doesn't appear to work (in some versions):
+#   Usage:  magic [-g gPort] [-d devType] [-m monType] [-i tabletPort] [-D] [-F objFile saveFile]
+#   [-T technology] [-rcfile startupFile | -norcfile][-noconsole] [-nowindow] [-wrapper] [file]
+#
+set Prog "magicDrc"
+
+set argv  [eval "list $env(_M0)"] ;# orig. mix of native plus custom args, for logging all args to script
+
+proc usage {args} {
+    if {[llength $args] > 0} {
+	puts "ERROR: ${::Prog}: [join $args]"
+    }
+    puts {usage: [ -T <techfilePath> ] [-S <drcStyleName>] [-N] [-l FILE_NAME] <magFileName>}
+    puts "  -T name specific techfile, passed to magic itself only, overrides tech implied by magFileName"
+    puts "  -S if given, changes from techfile's default drc style (perhaps \"drc(fast)\") to named style, for example: -S \"drc(full)\""
+    puts "  -l if given, enumerates EVERY individual error bbox to the FILE_NAME"
+    puts "  -N if given, do not use -dereference option of load for topcell (not available in older magics)"
+    puts "  Stdout will log a pareto of error type by count regardless."
+    puts ""
+    puts "  Recommend to run in dir with a ./.magicrc (or ./magic_setup) to configure magic's"
+    puts "  cell search path, thru addpath statements, to locate all cells."
+}
+
+# optionally hardcode library proc-s (part of site-wide extensions - always available - in context of efabless/open-galaxy)
+# This is to make the script more standalone from efabless environment; but these capabilities should be native to magic.
+
+if {[info command scratchWritable] == {}} {
+    puts "${::Prog}: hardcoding library proc-s..."
+# Replacement for 'cellname list exists CELLNAME', to fix ambiguity for cell "0".
+# For cell "0" test for membership in 'cellname list allcells'.
+#
+# Instead of returning 0 for (non-existent) and cellname for exists,
+# returns regular 0/1 instead for non-existent/exists.
+#
+# Therefore NOT direct replacement for uses of 'cellname list exists CELL'.
+# Requires code changes.
+proc cellnameExists {cell} {
+    expr {$cell ne "0" && [cellname list exists $cell] eq $cell ||
+	  $cell eq "0" && [lsearch -exact [cellname list allcells] $cell] > -1}
+}
+
+#
+# scratchWritable [-cleanup] [cellname1 ...] --
+#
+# Turn readonly cells writable in-memory, via redirect to scratch dir.
+# No cellname args: default is to process just all non-writable cells.
+# Explicit cellname arguments: ARE scatchified EVEN if ALREADY writable.
+# Limitation: Explicit named cell created in-mem, never saved, won't scratchify.
+# If just -cleanup: default is to only do cleanup: don't scratchify
+# any cells.
+#
+# -cleanup: Last scratch-dir, if any, and contents are deleted first.
+# No restoring old filepath of cells, save after cleanup will fail.
+#
+# Caller strongly recommended to first do: 'select top cell; expand'
+# to force whole hier. of a topcell to be loaded from disk into memory.
+#
+# This proc does not force expand cells. Before expanded, cells cannot be
+# checked whether writable, and cannot have filepath changed.
+#
+# For batch DRC, for 'drc listall count', every cell in-memory must
+# appear writable.  This is the work-around (caller to 1st ensure
+# hier. is loaded): Reset filepath of readonly cells to a scratch dir,
+# make a dummy/empty .mag in scratch dir for each cell. Change cell's
+# writeable flag.
+#
+# Skipped cells:
+# In all cases, cells are skipped if
+#   'cellname filepath' matches ::scratchWritableDir (already scratchified),
+# This proc does NOT try and force expand; it presumes caller forced an expand
+# thus cells are skipped if:
+#   'cellname filepath' is "default" (can mean not expanded yet, or created never saved),
+#   'cellname filepath' is <CELLNAME>.mag, indicates failed expand (unbound).
+# Note: when filepath gives "default" or <CELLNAME>.mag, the writeable check not meaningful.
+#
+# How to scratchify all in-memory cells (still subject to internal skipping):
+#     scratchWritable {*}[cellname list allcells]
+#
+# TODO: use a combo of filepath & flags likely can detect created in-mem,
+# and could redirect those too scratch dir if named explicitly.
+#
+# Side-effects:
+#   Runs zero or one subprocess, '/bin/mktemp -d' to make a scratch dir.
+#   Redirects where newly modified cells would be saved, if they ever are saved.
+#   Make's a scratch dir that needs to be cleaned-up.
+#   Leaves empty *.mag files in that scratch dir.
+#
+# Uses/requires proc cellnameExists.
+#
+# Same scratch-dir is reused if called multiple times, until next -cleanup.
+#
+# return value: list of cells not processed (skipped) for reasons cited above.
+# Non-existent cells are also skipped but not included in the return list.
+#
+if {![info exists ::scratchWritableDir]} {set ::scratchWritableDir {}}
+if {![info exists ::scratchWritableVerb]} {set ::scratchWritableVerb 0}
+proc scratchWritable {args} {
+    # parse -cleanup option
+    set clean [expr {[lindex $args 0] eq {-cleanup}}]
+    if {$clean} {
+	set args [lrange $args 1 end]
+    }
+
+    # If explicit cells given: don't limit to processing just readOnly cells.
+    set onlyReadonly [expr {$args == {}}]
+
+    # only if no -cleanup, does empty cell list imply all cells
+    set allcell [cellname list allcells]
+    if {!$clean && $args == {}} {
+	set args $allcell
+    }
+
+    # do cleanup
+    if {$clean} {
+	if {$::scratchWritableDir != {} && [file isdir $::scratchWritableDir]} {
+	    set files [glob -dir $::scratchWritableDir -- {*.ext} {*.mag}]
+	    lappend files $::scratchWritableDir
+	    if {$::scratchWritableVerb} {
+		puts "scratchWritable: running, file delete $files"
+	    }
+	    eval {file delete} $files
+	    set ::scratchWritableDir {}
+	}
+    }
+
+    # Filter out non-existent or unbound cells.
+    # Optionally filter already writable cells.
+    #
+    # Unbounds result from placements of cells that now don't exist:
+    # fail to expand.  This proc does not try and force expand; it
+    # presumes a forced expand was already done by caller (if caller
+    # wished).
+    #
+    # Referenced/used cells are initially unexpanded, not yet even located
+    # located in the search path, 'cellname filepath' returns "default".
+    # If expand fails (not found in search path), then 'cellname filepath'
+    # returns <CELLNAME>.mag, if expand worked, the directory containing
+    # the cell.
+    #
+    # If cell was 'cellname create' made, but never saved also "default".
+    # Such a cell is writable. So filter "default" and <CELLNAME>.mag.
+    set skipped {}
+    set ercell1 {}
+    set docells {}
+    foreach cell $args {
+	# filter (without recording as skipped) non-existent cells.
+	if {![cellnameExists $cell]} { continue }
+
+	# filepath = "default": unexpanded (not loaded from disk),
+	# or created in-mem and never saved (is writable already
+	# though flags won't say so): skip both.
+	# TODO: use a combo of filepath & flags likely can detect created in-mem,
+	# and might be able to redirect them too to scratch dir if named explicitly.
+	set tmppath [cellname list filepath $cell]
+	if {$tmppath eq "default"} {
+	    lappend skipped $cell
+	    continue
+	}
+
+	# flags not meaningful, until expanded or expand attempted.
+	# After expand attempt (filepath != "default"), and flags
+	# can now be used to determine cell unbound: not available.
+	set flags   [cellname list flags    $cell]
+	if {[lsearch -exact $flags available] < 0} {
+	    lappend ercell1 $cell
+	    continue
+	}
+
+	if {$onlyReadonly &&
+	    [cellname list writeable $cell] eq "writeable"} {
+	    lappend skipped $cell
+	    continue
+	}
+	lappend docells $cell
+    }
+
+    if {$::scratchWritableVerb} {
+	puts "scratchWritable: skipped cells: $skipped"
+    }
+    
+    # don't make a scratch dir if no work to do
+    if {$docells == {}} {
+	if {$::scratchWritableVerb} {
+	    puts "scratchWritable: scratch-directed 0 cells"
+	}
+	return $skipped
+    }
+
+    # make a scratch dir if needed
+    if {$::scratchWritableDir == {}} {
+	if {[catch {set dir [string trimright [exec /bin/mktemp -d]]} msg]} {
+	    error "ERROR: scratchWritable, '/bin/mktemp -d' failed, $msg"
+	}
+	if {![file isdir $dir] || ![file writable $dir]} {
+	    error "ERROR: scratchWritable, mktemp gave $dir, not a writable dir"
+	}
+	set ::scratchWritableDir $dir
+    }
+
+    set ercell2 {}
+    set okcell {}
+    set madef 0
+    foreach cell $docells {
+	# Relocate if needed: filepath doesn't already point to the scratch dir).
+	# 'cellname list filepath <cellNm>' -> appears to omit .mag extension,
+	# but disk-file needs the .mag in the path.
+	set trgr [file join $::scratchWritableDir "$cell"]      ;# expected "lookup" path
+	set trgw [file join $::scratchWritableDir "$cell.mag"]  ;# true "write" disk path
+	set src [cellname list filepath $cell]
+	if {[cellname list filepath $cell] ne $trgr && [cellname list filepath $cell] ne $trgw} {
+
+	    # make empty .mag for the cell
+	    if {[catch {set outmag [open $trgw w]} msg]} {
+		lappend ercell2 $cell
+		continue
+	    }
+	    incr madef
+	    close $outmag
+
+	    # relocate cell to new file
+	    cellname list filepath $cell $::scratchWritableDir
+	}
+
+	# make cell writable
+	cellname list writeable $cell true
+	lappend okcell $cell
+    }
+
+    if {$::scratchWritableVerb} {
+	puts "scratchWritable: scratch-directed $madef cells"
+    }
+    if {$ercell1 != {} || $ercell2 != {}} {
+	set pre "ERROR: scratchWritable, "
+	set msg {}
+	if {$ercell1 != {}} {
+	    lappend msg "$pre unbound cell(s): $ercell1"
+	}
+	if {$ercell2 != {}} {
+	    lappend msg "$pre failed to make .mag for cell(s): $ercell2"
+	}
+	error [join $msg "\n"]
+    }
+    set skipped
+} ;# end proc scratchWritable
+}
+
+# without top-level proc around bulk of script, intermediate error statements don't abort script.
+proc main {argv} {
+
+# process name-value pair options, if any
+set nbrErr 0
+set ndx 0
+set max [llength $argv]
+set extTechOpt {} ;# -T ...
+set enumFilel  {} ;# -l ... enum output file
+set variant {}    ;# -S ... non-default drc style
+set flatten 0
+set perfN   0     ;# -P <N> do crude DRC perf. test
+set noderef 0     ;# -N disable dereference option of: 'load ... -dereference'
+
+while {$ndx < $max && [string match "-*" [lindex $argv $ndx]]} {
+    set opt [lindex $argv $ndx]
+    incr ndx
+    switch -exact -- $opt {
+	-T {
+	    if {$ndx == $max} {
+		usage "missing tech-file argument for -T option"
+		exit 1
+	    }
+	    set extTechOpt [lindex $argv $ndx]
+	    incr ndx
+	}
+	-S {
+	    if {$ndx == $max} {
+		usage "missing drcStyle argument for -S option"
+		exit 1
+	    }
+	    set variant [lindex $argv $ndx]
+	    incr ndx
+	}
+	-P {
+	    if {$ndx == $max} {
+		usage "missing count argument for -P option"
+		exit 1
+	    }
+	    set perfN [lindex $argv $ndx]
+	    incr ndx
+	}
+	-F {
+	    set flatten 1
+	}
+	-N {
+	    set noderef 1
+	}
+	-l {
+	    if {$ndx == $max} {
+		usage "missing outputFile argument for -l option"
+		exit 1
+	    }
+	    set enumFilel [lindex $argv $ndx]
+	    incr ndx
+	    if {[catch {set enumOut [open $enumFilel w]} msg]} {
+		error "ERROR: ${::Prog}: failed to open-for-write '$enumFilel' threw error, $msg"
+	    }
+	    puts "${::Prog}: enumerating each error bbox to: $enumFilel"
+	}
+	default {
+	    usage "unknown option: $opt"
+	    exit 1
+	}
+    }
+}
+
+if {$ndx == $max} {
+    usage "missing magFileName argument, the topcell"
+    exit 1
+}
+
+# get cmd-line topcell, minus dir-path; and minus extension IFF ext is .mag
+set topc [file tail [lindex $argv $ndx]] ; incr ndx
+if {[file extension $topc] eq ".mag"} {
+    set topc [file rootname $topc]
+}
+set topcStr $topc
+
+# abort if user supplies extra args.
+if {$ndx != $max} {
+    usage "extra/unspported arg past magFileName, '[lindex $argv $ndx]'"
+    exit 1
+}
+
+# load the techfile
+if {$extTechOpt != ""} {
+    if {![file readable $extTechOpt]} {
+	error "ERROR: ${::Prog}: tech-file \"$extTechOpt\" is not readable."
+    }
+
+    tech load $extTechOpt
+    
+    # Verify the cmd-line -T option (if any) is still the current 'tech filename'. If we didn't
+    # explicitly 'tech load' ourselves, the .magicrc or magic.setup might 'tech load' something else.
+    # The 'file join [pwd] ...' makes relative path absolute, but without resolving
+    # all symlinks (which 'file normalize' would do).
+    set techf2 [file join [pwd] [tech filename]]
+    set techf1 [file join [pwd]     $extTechOpt]
+    if {$techf1 != $techf2} {
+	error "ERROR: ${::Prog}: failed tech-load \"$techf1\" (tech-filename=\"$techf2\" not a match)"
+    }
+}
+
+# if mag-cell were passed natively on magic cmd-line, this is too late:
+if {$noderef} {
+    load $topc
+} else {
+    load $topc -dereference
+}
+
+# error checks: ensure (1st) cmd-line cellname now in-memory, and is now the current cell
+
+set topcells [cellname list top]
+# filter (UNNAMED)
+set topcells [lsearch -exact -not -all -inline $topcells "(UNNAMED)"]
+# puts "cellname-list-top is: $topcells"
+
+# could use [cellname list flags $topc] and ensure non-null result (list with available),
+# but if it fails (cell not found), it generates unwanted stdout.
+if {[lsearch -exact [cellname list allcells] $topc] < 0} {
+    error "ERROR: ${::Prog}: cmd-line topcell \"$topc\" not in magic's list of allcells."
+}
+
+if {[lsearch -exact $topcells $topc] < 0} {
+    puts "WARNING: ${::Prog}: cmd-line topcell \"$topc\" not in magic's list of topcells: $topcells"
+}
+
+# crude way even in batch to determine the "current" cell; perhaps not yet the "Edit" cell
+# WARNING, if topcell locked elsewhere or not writable, it can't become the "Edit" cell.
+set topcw [cellname list window]
+if {$topcw ne $topc} {
+    error "ERROR: ${::Prog}: cmd-line topcell, $topc, is not the current cell, 'cellname list window'=$topcw"
+}
+
+# for topcell, filepath==default doesn't change by expand,
+# indicates unknown cell created in-memory by magic's startup sequence.
+if {[cellnameExists         $topc] &&
+    [cellname list filepath $topc] eq "default"} {
+    puts "Search path for cells is \"[path search]\""
+    error "ERROR: ${::Prog}: cmd-line topcell, $topc, auto-created in-memory: not found in cell search path"
+}
+
+if {$flatten} {
+    # delete (UNNAMED) if any.
+    set trg "(UNNAMED)"
+    if {[cellnameExists $trg]} {cellname delete $trg}
+
+    # rename top cell to (UNNAMED)
+    cellname rename $topc $trg
+
+    # now Edit Cell contents are original top cell, but under name (UNNAMED)
+    # flatten Edit-Cell into original top cell name
+    puts "${::Prog}: flattening..."
+    flatten $topc
+
+    # load and edit new version of top cell. This is from in-memory, just making it current-cell.
+    # (So with or without -dereference is expected would have discernable effect by now;
+    # and since it's flattened there are no subcell instances either).
+    if {$noderef} {
+	load $topc
+    } else {
+	load $topc -dereference
+    }
+
+    # crude way even in batch to determine the "current" cell; perhaps not yet the "Edit" cell
+    # WARNING, if topcell locked elsewhere or not writable, it can't become the "Edit" cell.
+    set topcw [cellname list window]
+    if {$topcw ne $topc} {
+	error "ERROR: ${::Prog}: assertion failed, post-flatten, $topc, is not the current cell, 'cellname list window'=$topcw"
+    }
+
+    # should not be necessary:
+    select top cell
+    edit
+
+    # crude way even in batch to determine the "current" cell; perhaps not yet the "Edit" cell
+    # WARNING, if topcell locked elsewhere or not writable, it can't become the "Edit" cell.
+    set topcw [cellname list window]
+    if {$topcw ne $topc} {
+	error "ERROR: ${::Prog}: assertion-2 failed, post-flatten, $topc, is not the current cell, 'cellname list window'=$topcw"
+    }
+}
+
+# todo: Need a check for non-existent topcell (though magic reported not-found and auto-created it).
+# todo: We should locate fullpath to topcell on disk to record this in the log.
+#
+# WARNING, magic junkCell, or magic junkDir/junkCell (passing paths to cells that don't exist),
+# generate startup error messages (could not open cell), but magic creates the new cell in memory.
+# No simple way to detect this after the fact. Can walk the cell search path to verify it's on disk.
+# For the non-existent cell, magic also discards the dirpath from the cmd-line arg.
+# If it did exist at that path, magic opens it successfully, despite that dir not in search path.
+# A proper check for implicit create of non-existent cell should account for this effect too.
+
+# write a line with timestamp and all arguments to stdout (log)
+# (magic renames the TCL clock command)
+set clockp clock
+if {[info command $clockp] == {} && [info command orig_clock] != {}} {
+    set clockp orig_clock
+}
+set nowSec [$clockp seconds]
+set timestamp [$clockp format $nowSec -format "%Y-%m-%d.%T.%Z"]
+# Show quoted logged argv here so it's machine readable for replay purposes.
+puts "${::Prog}: timestamp: $timestamp, arguments: $::env(_M0)"
+
+puts "${::Prog}: running drc on topcell: $topcStr"
+puts "${::Prog}: tech-name: [tech name] -version: [tech version] -filename: [tech filename] -lambda [tech lambda]"
+
+# log the cell search path for this run. Emulates format output by plain "path" (but which prints more than one the cell search path).
+puts "Search path for cells is \"[path search]\""
+
+set res {}
+if {$variant != {}} {
+    if {[catch {set res [drc list style $variant]} msg]} {
+	puts "ERROR: ${::Prog}: but CONTINUING, 'drc style $variant' threw error, $msg"
+    }
+} else {
+    if {[catch {set res [drc list style]} msg]} {
+	puts "ERROR: ${::Prog}: but CONTINUING, 'drc list style' threw error, $msg"
+    }
+}
+if {$res != {}} {
+    puts "drc style reports:\n$res"
+}
+
+# just Manhattan is default, turn on euclidean, and log new mode
+drc euclidean on
+drc euclidean
+
+# 1st "select top cell": without it drc-list-count is blank, and error count reduced.
+# May be unnecessary in some cases.
+# WARNING: if topcell locked by another process, default box is NOT set to full top cell without this (as of 8.1.70 or earlier)
+select top cell
+# expand cell cells: scratchify step requires this up front else can't force all cells writable.
+expand
+
+# The expand triggered load of all subcells. Till then allcells may be incomplete.
+set allcells [cellname list allcells]
+# filter (UNNAMED)
+set allcells [lsearch -exact -not -all -inline $allcells "(UNNAMED)"]
+set nbrAllCells [llength $allcells]
+# puts "DEBUG: cellname-list-allcells are: $allcells"
+
+# TODO: do explicit separate unbound check here (don't rely on scratchWritable for this)
+
+# make allcells writable. Can error out:
+# if are unbounds, or couldn't make scratch dir or .mag files.
+set scratch [expr {!$flatten}]
+if {$scratch && [catch {scratchWritable} msg]} {
+    puts stderr "ERROR: ${::Prog}: aborting at scratchWritable due error(s):"
+    error $msg
+}
+
+# Erase all preexisting *.drtcl first. Else when cell transitions from
+# dirty in previous run (leaving *.drtcl), to clean, the old *.drtcl
+# remains.
+# TODO: only delete *.drtcl of cells in 'cellname list allcells'?
+# TODO: move this up, before scratchWritable?
+set files [glob -nocomplain -types {f} -- ./*.drtcl]
+if {$files != {}} {
+    # TODO: detect/report failure details better here?
+    puts "${::Prog}: deleting preexisting *.drtcl"
+    set msg {}
+    set delfail [catch {eval {file delete} $files} msg]
+    set files [glob -nocomplain -types {f} -- ./*.drtcl]
+    if {$delfail || $files != {}} {
+	puts "ERROR: ${::Prog}: failed to clean old ./*.drtcl files. $msg"
+	incr nbrErr
+    }
+}
+
+edit ;# Fails if topcell not writable, should not be not needed post scratchWritable
+
+set outScale [cif scale out]
+
+# "select top cell" and box [view bbox] should be equivalent in
+# placing a box around whole cell extent.
+# The box cmd ALSO prints lambda and micron user-friendly box data,
+# but it prints microns with not enough resolution,
+# (and no option to disable that flawed print out).
+#
+# todo: emulate box output in full, except for higher resolution,
+# here we only scale/print the overall bbox in microns.
+# select top cell       ;# paranoid, reset the box to data extents post-expand
+# set bbox [view bbox]
+# set bbs {}
+# foreach oord $bbox {
+#     lappend bbs [format "%.3f" [expr {$outScale * $oord}]]
+# }
+# puts "outScale: $outScale, view-bbox: $bbox"
+# puts "Root cell box2: ([lindex $bbs 0]  [lindex $bbs 1]), ([lindex $bbs 2]  [lindex $bbs 3])"
+
+# shouldn't need:
+# drc on
+
+# Want to use 'drc list count' to tell us which cells have errors, so we can
+# run 'drc listall why' on just those cells to enumerate details (which reruns
+# drc again unfortunately).
+
+# For accurate DRC (as of 8.1.70), specifically 'drc list count', need:
+# all-writable cells, then run: 'drc check' & 'drc catchup'.
+# Now we have all writable cells.
+set timeRepeat 1
+if {$perfN > 0} {
+    set timeRepeat $perfN
+}
+set timeres [time {
+    set drcCheckTime1 [time {drc check}]
+    set drcCheckTime2 [time {drc catchup}] } $timeRepeat]
+
+if {$perfN > 0} {
+    puts "perf: ${perfN}X 'drc check','drc catchup': $timeres"
+    puts "perf: last 'drc check' time: $drcCheckTime1"
+    puts "perf: last 'drc catchup' time: $drcCheckTime2"
+    drc statistics
+    drc rulestats
+}
+
+# todo: this 2nd select was in GDS version, test if needed in mag version:
+# 2nd select top cell needed else error count may be reduced (why? bbox does not change due to DRC)
+select top cell
+set outScale [cif scale out]
+set bbox [view bbox]
+set bbs {}
+foreach oord $bbox {
+    lappend bbs [format "%.3f" [expr {$outScale * $oord}]]
+}
+puts "outScale(ostyle=[cif list ostyle]): $outScale, view-bbox: $bbox"
+puts "Root cell box: ([lindex $bbs 0]  [lindex $bbs 1]), ([lindex $bbs 2]  [lindex $bbs 3])"
+# print several native bbox representations:
+box
+
+# listall vs list appear same as of 8.1.70 or earlier.
+# warning: celllist order is not stable, not repeatable; run to run on same data.
+# puts "DEBUG: (drc listall count total) is $drcListCountTot"
+set celllist [drc listall count]
+set celllist [lsearch -not -all -inline -index 0 -exact $celllist "(UNNAMED)"]
+# puts "DEBUG: (drc listall count) is [drc listall count]"
+set drcListCountTot [drc list count total]
+set nbrErrCells [llength $celllist]
+
+# TODO: major problem: 'drc listall why' repeated an every cell, will do subcells
+# multiple times, as many times as their depth in the hier.
+
+# canonicalize order of celllist, move topc to last (if present whatsoever).
+# force our own artificial entry for topc (zero errors) if not present (was clean)
+# puts "DEBUG: celllist before: $celllist"
+set topcPair [lsearch           -inline -index 0 -exact $celllist $topc]
+set celllist [lsearch -not -all -inline -index 0 -exact $celllist $topc]
+set celllist [lsort -index 0 -dictionary $celllist]
+if {$topcPair == {}} {
+    # puts "DEBUG: $topc clean, forcing celllist entry for it"
+    set topcPair [list $topc 0]
+}
+lappend celllist $topcPair
+# puts "DEBUG: celllist after: $celllist"
+# puts "DEBUG: adjusted celllist(drc list count) is $celllist"
+
+# loop over celllist
+set doFeedback 1 ;# TODO: add cmd-line option to control this
+
+# collect 'dry listall why' for the cells in 'cell list count' with non-zero errors
+# If 'drc listall why' does report zero (shouldn't since we're only processing cells
+# with non-zero counts), it unavoidably writes to console a No drc errors found message.
+# We don't want such polluting our list of per-cell pareto's, so don't risk running
+# drc why in-line, in-between per-cell paretos.
+array set cell2why [list $topc {}] ;# default at least empty topcell why list
+foreach pair $celllist {
+    if {[lindex $pair 1] < 1} {continue} ;# only happens for topcell if topcell clean
+    set acell [lindex $pair 0]
+
+    # TODO: magic needs a useful error checkable load command.
+    # The 'load' writes errors to console/stdout, but never throws an error,
+    # nor gives a useful return value. i.e. These catch never catch.
+    if {$noderef} {
+	if {[catch {set res [load $acell]} msg]} {
+	    puts "ERROR: ${::Prog}: 'load $acell' threw error, $msg"
+	    exit 1
+	}
+    } else {
+	if {[catch {set res [load $acell -dereference]} msg]} {
+	    puts "ERROR: ${::Prog}: 'load $acell -dereference' threw error, $msg"
+	    exit 1
+	}
+    }
+    select top cell ;# paranoid, that without it, drc's are reduced
+
+    # optionally do crude DRC perf. analysis here. Only for top-cell, only if -P <N> option given.
+    set timeRepeat 1
+    if {$perfN > 0 && $topc eq $acell} {
+	set timeRepeat $perfN
+    }
+    set timeres [time {set cell2why($acell) [drc listall why]} $timeRepeat]
+    if {$perfN > 0 && $topc eq $acell} {
+	puts "perf: ${::Prog}: for '$acell', ${perfN}X 'drc listall why': $timeres"
+    }
+}
+
+# done with all magic-specifics here. Shouldn't need scratch dir any longer.
+# If this prints something (generally does), don't want it after the pareto table.
+
+# clean/remove the tmp scratch dir and contents
+# TODO: all fatal errors need to call a cleanup proc that includes this before abort
+if {$scratch && [catch {scratchWritable -cleanup} msg]} {
+    puts "ERROR: ${::Prog}: 'scratchWritable -cleanup' threw error, $msg"
+    incr nbrErr
+}
+
+set gtotal 0
+set gcells 0
+foreach pair $celllist {
+    puts ""
+    set acell [lindex $pair 0]
+    if {![info exists cell2why($acell)]} {
+	puts "ERROR: ${::Prog}: cell: $acell, assertion failed, no drc-why list for 'drc list count' pair: $pair"
+	# exit 1
+	continue
+    }
+    set whys $cell2why($acell)
+
+    # enumerate errors under box, plain "drc why" only reports unique types, no quantities
+    # as-yet-undocumented "drc listall why" gives: {errStr1 {errBox1 ...} errStr2 {errBox1 ...} ... }
+    set pareto {}
+    set total 0
+    set enumTotal 0
+    set types 0
+    set typeDup 0
+    set dups 0
+
+    set fbOut {}
+    # file path for feedback, keep in CWD
+    if {$doFeedback && $fbOut == {}} {
+	set fbOut "./$acell.drtcl"
+	if {![file writable $fbOut] &&
+	    ([file exists $fbOut] || ![file writable [file dir $fbOut]])} {
+	    puts stderr "ERROR: ${::Prog}: feedback output not writable, $fbOut"
+	    incr nbrErr
+	    set fbOut {}
+	} elseif {[catch {set outfb [open $fbOut w]} msg]} {
+	    puts stderr "ERROR: ${::Prog}: failed to truncate previous feedback output, $fbOut : $msg"
+	    incr nbrErr
+	    set fbOut {}
+	}
+    }
+    foreach {str boxes} $whys {
+	# sort errors
+	set boxes [lsort -dictionary $boxes]
+
+	# for our pareto, gather data
+	set this [llength $boxes]
+	incr total $this
+	incr types
+	lappend pareto [list $this $str]
+
+	# for enumOut, emulate formatting of $CAD_ROOT/magic/tcl/drc.tcl, which is
+	# not tk pure: fails with complaint about winfo
+	# note: we walk these errors also in order to count/report stats on duplicates, even if not outputing enumerations
+	if {[info exists enumOut]} {
+	    if {$types == 1} {
+		puts $enumOut "[join $pair]\n----------------------------------------"
+	    }
+	    puts $enumOut "${str}\n----------------------------------------"
+	}
+	set lastq {}
+	set thisDup 0
+	foreach quad $boxes {
+	    set quadUM {}
+	    foreach coord $quad {
+		set valum [expr {$coord * $outScale}]
+		set valumf [format "%.3f" $valum]
+		lappend quadUM "${valumf}um"
+	    }
+	    set dup [expr {$quad == $lastq}]
+	    incr thisDup $dup
+	    set line $quadUM
+	    if {[info exists enumOut]} {
+		if {$dup} {
+		    puts $enumOut "[join $line] #dup"
+		} else {
+		    puts $enumOut [join $line]
+		}
+	    }
+	    if {$fbOut != {}} {
+		set line [join $quadUM]
+		regsub -all -- "(\[\[\"\$\\\\])" $str {\\\1} strdq
+		puts $outfb "[concat box $line]"                nonewline
+		puts $outfb " ; feedback add \"$strdq\" medium" nonewline
+		if {$dup} {
+		    puts $outfb " ;#dup"
+		} else {
+		    puts $outfb ""
+		}
+	    }
+
+	    incr enumTotal
+	    set lastq $quad
+	}
+	if {$thisDup} {
+	    incr typeDup
+	    incr dups $thisDup
+	}
+	if {[info exists enumOut]} {
+	    puts $enumOut "----------------------------------------\n"
+	}
+    }
+
+    if {$fbOut != {}} {
+	close $outfb
+	set outfb {}
+    }
+
+    set pareto [lsort -integer -decreasing -index 0 $pareto]
+    if {$total > 0} {
+	puts "--- #err|description, table for cell: $acell"
+    }
+    foreach pair $pareto {
+	puts "[format {%8d} [lindex $pair 0]] [lindex $pair 1]"
+    }
+    if {$typeDup} {
+	puts "[format {%8d} $dups] total duplicate error(s) among $typeDup error type(s), cell: $acell"
+    }
+    puts "[format {%8d} $total] total error(s) among $types error type(s), cell: $acell"
+    # add to grand-totals
+    incr gcells
+    incr gtotal $total
+
+    # always compare the total from the enum to the pareto as error check
+    if {$total != $enumTotal} {
+	puts "ERROR: ${::Prog}: cell: $acell, assertion failed, pareto vs enum count mismatch: $total != $enumTotal"
+	incr nbrErr
+    }
+}
+
+# TODO: in the summary echo also techfile-full-path and drc-style name?
+# grand totals
+puts "[format {%8d} $nbrErrCells] of $nbrAllCells cell(s) report error(s)"
+puts "[format {%8d} $gtotal] grand-total error(s) across $gcells cell(s)"
+
+# wish to compare the drc-list-count-total to the pareto total.
+# Per te 2014-08-27 : it is not an error.
+# if {$total != $drcListCountTot} {
+#   puts "info: ${::Prog}: drc-list-count-total vs drc-listall-why mismatch {drc list count total} gave $drcListCountTot, but {drc listall why} gave $total"
+# }
+
+if {[info exists enumOut]} {
+    close $enumOut
+}
+
+# set celllist4 [drc list count]
+# puts "DEBUG: drc list count0: $celllist0"
+# puts "DEBUG: drc list count1: $celllist1"
+# puts "DEBUG: drc list count2: $celllist2"
+# puts "DEBUG: drc list count3: $celllist3"
+# puts "DEBUG: native (drc list count) is $celllistn"
+# puts "DEBUG: drc list count4: $celllist4"
+
+# todo: implement super-pareto, ranked table of SUM of all DRC errs/counts from ALL cells.
+# (It still would not reflect as-if-flat hierarchical expansion due to repetition of instances).
+
+set nbrErr
+}
+
+# non-zero exit-status on errors, either if thrown by main, or counted and returned by main
+set nbrErr 0
+if {[catch {set nbrErr [main $argv]} msg]} {
+    puts stderr $msg
+    set nbrErr 1
+} elseif {$nbrErr > 0} {
+    puts "ERROR: ${::Prog}: script terminated with errors reported above."
+}
+exit $nbrErr
+
+# for emacs syntax-mode:
+# Local Variables:
+# mode:tcl
+# End: