34 lines
639 B
Python
34 lines
639 B
Python
from collections import namedtuple
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from re import compile as RE
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Snippet = namedtuple('Snippet', 'sha offset length')
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_fmt = '{%s %i %i}'
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pat = (
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'{'
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'\s*'
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'(?P<sha>[a-f0-9]+)'
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'\s+'
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'(?P<offset>\d+)'
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'\s+'
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'(?P<length>\d+)'
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'\s*'
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'}'
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)
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_PAT = RE(pat)
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def to_string(snip):
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return _fmt % _ts(*snip)
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def _ts(sha, offset, length):
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return sha.decode('ascii'), offset, length
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def from_string(text):
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m = _PAT.match(text)
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if not m:
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raise ValueError
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return _fs(**m.groupdict())
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def _fs(sha, offset, length):
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return Snippet(sha.encode('ascii'), int(offset), int(length))
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