mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-10 09:48:32 +00:00
Thomas Krijnen
44 lines
2.2 KiB
Python
44 lines
2.2 KiB
Python
###############################################################################
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# #
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# This file is part of IfcOpenShell. #
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# #
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# IfcOpenShell is free software: you can redistribute it and/or modify #
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# it under the terms of the Lesser GNU General Public License as published by #
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# the Free Software Foundation, either version 3.0 of the License, or #
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# (at your option) any later version. #
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# #
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# IfcOpenShell is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# Lesser GNU General Public License for more details. #
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# #
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# You should have received a copy of the Lesser GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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###############################################################################
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import string
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from functools import reduce
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chars = string.digits + string.ascii_uppercase + string.ascii_lowercase + '_$'
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def compress(g):
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bs = [int(g[i:i+2], 16) for i in range(0, len(g), 2)]
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def b64(v, l=4):
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return ''.join([chars[(v // (64**i))%64] for i in range(l)][::-1])
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return ''.join([b64(bs[0], 2)] + [b64((bs[i] << 16) + (bs[i+1] << 8) + bs[i+2]) for i in range(1,16,3)])
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def expand(g):
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def b64(v):
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return reduce(lambda a, b: a * 64 + b, map(lambda c: chars.index(c), v))
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bs = [b64(g[0:2])]
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for i in range(5):
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d = b64(g[2+4*i:6+4*i])
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bs += [(d >> (8*(2-j)))%256 for j in range(3)]
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return ''.join(['%02x'%b for b in bs])
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def split(g):
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return '{%s-%s-%s-%s-%s}'%(g[:8], g[8:12], g[12:16], g[16:20], g[20:])
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