Initial commit of public repository open_pdks.
diff --git a/common/makestub.py b/common/makestub.py
new file mode 100755
index 0000000..a5334d7
--- /dev/null
+++ b/common/makestub.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python3
+#
+#-------------------------------------------------------------------
+# makestub.py
+#
+# Read a CDL or SPICE netlist and remove all contents from subcircuits,
+# leaving only the .SUBCKT ... .ENDS wrapper. Used as a filter, so it
+# replaces the original file with the modified one. If the original
+# file is a symbolic link, then it is first unlinked and replaced with
+# the new contents.
+#
+# Use:
+#
+# makestub.py <path_to_netlist_file>
+#
+#-------------------------------------------------------------------
+
+import os
+import re
+import sys
+import stat
+import textwrap
+
+def makeuserwritable(filepath):
+ if os.path.exists(filepath):
+ st = os.stat(filepath)
+ os.chmod(filepath, st.st_mode | stat.S_IWUSR)
+
+def generate_stubs(netlist_path, output_path):
+ netlist_dir = os.path.split(netlist_path)[0]
+ netlist_filename = os.path.split(netlist_path)[1]
+ netlist_root = os.path.splitext(netlist_filename)[0]
+ netlist_ext = os.path.splitext(netlist_filename)[1]
+
+ if not os.path.exists(netlist_path):
+ print('Error: Specified file "' + netlist_path + '" does not exist!')
+ return
+
+ if output_path == None:
+ output_path = netlist_path
+
+ with open(netlist_path, 'r') as ifile:
+ spicetext = ifile.read().splitlines()
+
+ # Remove blank lines and comment lines
+ spicelines = []
+ for line in spicetext:
+ if len(line) > 0:
+ if line[0] != '*':
+ spicelines.append(line)
+
+ # Remove line extensions
+ spicetext = '\n'.join(spicelines)
+ spicelines = spicetext.replace('\n+', ' ').splitlines()
+
+ # SPICE subcircuit definition:
+ subcrex = re.compile(r'[ \t]*\.subckt[ \t]+([^ \t]+)[ \t]+(.*)$', re.IGNORECASE)
+ endsrex = re.compile(r'[ \t]*\.ends[ \t]*', re.IGNORECASE)
+
+ spiceoutlines = []
+
+ insub = False
+ for line in spicelines:
+ if insub:
+ ematch = endsrex.match(line)
+ if ematch:
+ insub = False
+ spiceoutlines.append(line)
+ else:
+ smatch = subcrex.match(line)
+ if smatch:
+ insub = True
+ spiceoutlines.append('')
+ spiceoutlines.append('*----------------------------------------------')
+ spiceoutlines.append('* SPICE stub entry for ' + smatch.group(1) + '.')
+ spiceoutlines.append('*----------------------------------------------')
+ spiceoutlines.append('')
+ spiceoutlines.append(line)
+
+ if output_path == netlist_path:
+ if os.path.islink(netlist_path):
+ os.unlink(netlist_path)
+
+ # Re-wrap continuation lines at 100 characters
+ wrappedlines = []
+ for line in spiceoutlines:
+ wrappedlines.append('\n+ '.join(textwrap.wrap(line, 100)))
+
+ # Just in case the file in the source repo is not user-writable
+ if os.path.exists(output_path):
+ makeuserwritable(output_path)
+
+ with open(output_path, 'w') as ofile:
+ for line in wrappedlines:
+ print(line, file=ofile)
+
+# If called as main, run generate_stubs
+
+if __name__ == '__main__':
+
+ # Divide up command line into options and arguments
+ options = []
+ arguments = []
+ for item in sys.argv[1:]:
+ if item.find('-', 0) == 0:
+ options.append(item)
+ else:
+ arguments.append(item)
+
+ # Need one argument: path to CDL or SPICE netlist
+ # If two arguments, then 2nd argument is the output file.
+
+ if len(arguments) == 2:
+ netlist_path = arguments[0]
+ output_path = arguments[1]
+ generate_stubs(netlist_path, output_path)
+ elif len(arguments) != 1:
+ print("Usage: makestub.py <file_path> [<output_path>]")
+ elif len(arguments) == 1:
+ netlist_path = arguments[0]
+ generate_stubs(netlist_path, None)
+
