51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
# No unicode_literals
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import json
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import os
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import unicodedata
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from binascii import hexlify, unhexlify
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def to_bytes(u):
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return unicodedata.normalize("NFC", u).encode("utf-8")
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def bytes_to_hexstr(b):
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assert isinstance(b, type(b""))
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hexstr = hexlify(b).decode("ascii")
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assert isinstance(hexstr, type(u""))
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return hexstr
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def hexstr_to_bytes(hexstr):
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assert isinstance(hexstr, type(u""))
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b = unhexlify(hexstr.encode("ascii"))
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assert isinstance(b, type(b""))
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return b
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def dict_to_bytes(d):
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assert isinstance(d, dict)
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b = json.dumps(d).encode("utf-8")
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assert isinstance(b, type(b""))
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return b
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def bytes_to_dict(b):
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assert isinstance(b, type(b""))
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d = json.loads(b.decode("utf-8"))
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assert isinstance(d, dict)
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return d
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def estimate_free_space(target):
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# f_bfree is the blocks available to a root user. It might be more
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# accurate to use f_bavail (blocks available to non-root user), but we
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# don't know which user is running us, and a lot of installations don't
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# bother with reserving extra space for root, so let's just stick to the
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# basic (larger) estimate.
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try:
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s = os.statvfs(os.path.dirname(os.path.abspath(target)))
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return s.f_frsize * s.f_bfree
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except AttributeError:
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return None
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