scripts/obs_above.py

#!/usr/bin/env python3
# takes a lef file and a y position => obstructs everything above
import re
import os
import sys

ARGV = sys.argv
if len(ARGV) < 2:
    print("Usage " + ARGV[0] + " threshold_y_pos")
    sys.exit(-1)
MAX_Y = float(ARGV[1])
LAYERS = ["li1", "met1", "met2", "met3", "met4", "met5"]
SIZE_REGEX = r"^\s*SIZE\s+(-?\d+\.?\d*)\s+BY\s+(-?\d+\.?\d*)\s+;$"

def print_obs_section(size_x, size_y):
    for layer in LAYERS:
        print("     LAYER %s ;" %(layer))
        print("       RECT %f %f %s %s ;" % (0, MAX_Y, size_x, size_y))

obs_section = False
for line in sys.stdin:
	if line.isspace():
	    continue

	size_match = re.search(SIZE_REGEX, line)
	if size_match:
	    size_x, size_y = size_match.group(1), size_match.group(2)
	elif line.find("OBS") != -1:
	    obs_section = True
	elif obs_section and line.find("END") != -1:
	    obs_section = False

	# print all except RECTs inside OBS
	if line.find("OBS") != -1:
	    print(line, end='')
	    print_obs_section(size_x, size_y)
	elif not obs_section:
	    print(line, end='')