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DRC XOR scirpt to output oas, only when there is difference

werkwerk
edited July 2016 in General

Hi Mattias,

Based on your example in
http://klayout.de/forum/comments.php?DiscussionID=293

I modified your code, to output the oas file only when the two gds files are not XOR clean.

However even for the same oas files, the final 'out.oas' file will still be generated.

Can you please help to take a look?

Many thanks!
LW

# Save as "xor.drc" and run with:
#   klayout -b -r xor.drc -rd gds1=a.gds -rd gds2=b.gds -rd out=out.gds
#
# Useful options:
#
# * verbose log:
#   verbose
#
# * enable tiling:
#   tiles(1.mm, 1.mm)
#
# * use 4 cores in parallel (with tiles):
#   threads(4)
#

l1 = layout($gds1)
l2 = layout($gds2)

$xor_result = 0

layers = []
[ l1, l2 ].each do |l|
  l.layout.layer_indices.each do |index|
    info = l.layout.get_info(index)
    layers << [info.layer, info.datatype ]
  end
end

layers.sort.uniq.each do |l,d|
  log "Running XOR between #{l}/#{d} .."
  if l1.input(l, d) ^ l2.input(l, d)
    $xor_result = 1
  end
end

puts [$xor_result]

if $xor_result == 1
  target($out)
# collect layers
  layers.sort.uniq.each do |l,d|
    log "Running XOR between #{l}/#{d} .."
      (l1.input(l, d) ^ l2.input(l, d)).output(l, d)
  end
end

Comments

  • werkwerk
    edited July 2016
    Hi,

    The correct usage should be:
    - if l1.input(l, d) ^ l2.input(l, d)
    + unless is_empty?(l1.input(l, d) ^ l2.input(l, d))

    Maybe the overhead in layer object is different even if the two layers are same.

    Thanks!
    LW
  • MatthiasMatthias
    edited November -1

    Hi werk,

    A boolean operation returns a layer object and that is never false in Ruby. The method to test whether a layer is empty is is_empty?. So this should work:

    if !(l1.input(l, d) ^ l2.input(l, d)).is_empty?
  ...
end

    Another remark: please don't use global variables (like $xor_result). The file names have to be global since they are specified externally. But internal variables can be local, so simply xor_result is better.

    Regards,

    Matthias

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