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