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- # Copyright (c) Twisted Matrix Laboratories.
- # See LICENSE for details.
-
-
- def parse(s):
- s = s.strip()
- expr = []
- while s:
- if s[0:1] == b"(":
- newSexp = []
- if expr:
- expr[-1].append(newSexp)
- expr.append(newSexp)
- s = s[1:]
- continue
- if s[0:1] == b")":
- aList = expr.pop()
- s = s[1:]
- if not expr:
- assert not s
- return aList
- continue
- i = 0
- while s[i : i + 1].isdigit():
- i += 1
- assert i
- length = int(s[:i])
- data = s[i + 1 : i + 1 + length]
- expr[-1].append(data)
- s = s[i + 1 + length :]
- assert False, "this should not happen"
-
-
- def pack(sexp):
- return b"".join(
- b"(%b)" % (pack(o),)
- if type(o) in (type(()), type([]))
- else b"%d:%b" % (len(o), o)
- for o in sexp
- )
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