spice.py

#!/usr/bin/env python3

import re


header = """\
* Copyright 2020 The SkyWater PDK Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0

"""


RE_CONTINUES = re.compile('\\n\\+ ')
RE_SUBCKT = re.compile('.SUBCKT (?P<name>[^ ]*) (?P<ports>[^\\n]*)(?P<contents>.*?)\\n.ENDS(\\s+(?P=name))?\\n', re.I|re.DOTALL)


def change_names(new_lib, contents):
    contents = RE_CONTINUES.sub('', contents)
    output = []
    info = {}

    last_subckt_endpos = 0
    for subckt in RE_SUBCKT.finditer(contents):
        between = contents[last_subckt_endpos:subckt.start(0)]
        if between.strip():
            for l in between.splitlines():
                assert not l or l.strip().startswith('*'), l
        if between:
            output.append(between)
        last_subckt_endpos = subckt.end(0)

        old_subcktname = subckt.group('name')

        subckt_ports = subckt.group('ports').split()

        subckt_data = subckt.group(0)
        for p in subckt_ports:
            subckt_data = re.sub(f'\\b{p}\\b', p.upper(), subckt_data)

        output.append(subckt_data)

        print()
        print("="*75)
        print(subckt_data)
        print("-")
        print(subckt_ports)
        print("="*75)


    output.append(contents[last_subckt_endpos:])
    print(output)
    return "".join(output)