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oot/tools/msgenc.py
Tharo 251d90301c
Make text headers encoding more robust (#1145)
* Improve encoding stage of text headers

* Fix r string

* Remove another unnecessary backslash
2022-02-15 00:26:03 +01:00

55 lines
1.5 KiB
Python

#!/usr/bin/env python3
#
# message_data_static text encoder
#
import argparse, ast, re
def read_charmap(path):
with open(path) as infile:
charmap = infile.read()
charmap = ast.literal_eval(charmap)
charmap = { repr(k)[1:-1] : chr(v) for k,v in charmap.items() }
return charmap
def convert_text(text, charmap):
def cvt_str(m):
string = m.group(0)
for orig,char in charmap.items():
string = string.replace(orig, char)
return string
# Naive string matcher, assumes single line strings and no comments, handles escaped quotations
string_regex = re.compile(r'"((?:[^\\"\n]|\\.)*)"')
# Collapse escaped newlines
text = text.replace("\\\n", "")
# Encode according to charmap
text = re.sub(string_regex, cvt_str, text)
return text
def main():
parser = argparse.ArgumentParser(description="Encode message_data_static text headers")
parser.add_argument("charmap", help="path to charmap file specifying custom encoding elements")
parser.add_argument("input", help="path to file to be encoded")
parser.add_argument("output", help="encoded file")
args = parser.parse_args()
charmap = read_charmap(args.charmap)
text = ""
with open(args.input, "r") as infile:
text = infile.read()
text = convert_text(text, charmap)
with open(args.output, "w", encoding="raw_unicode_escape") as outfile:
outfile.write(text)
if __name__ == "__main__":
main()