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"""
This is a modified version of Victor Stinner's pure-Python implementation of
PEP 383: the "surrogateescape" error handler of Python 3.
This code is released under the Python license and the BSD 2-clause license
Source: misc/python/surrogateescape.py in https://bitbucket.org/haypo/misc
"""
from __future__ import division, print_function, unicode_literals
import codecs
chr = __builtins__.get('unichr', chr)
def surrogateescape(exc):
if isinstance(exc, UnicodeDecodeError):
decoded = []
for code in exc.object[exc.start:exc.end]:
if not isinstance(code, int):
code = ord(code)
if 0x80 <= code <= 0xFF:
decoded.append(chr(0xDC00 + code))
elif code <= 0x7F:
decoded.append(chr(code))
else:
raise exc
return (''.join(decoded), exc.end)
elif isinstance(exc, UnicodeEncodeError):
encoded = []
for ch in exc.object[exc.start:exc.end]:
code = ord(ch)
if not 0xDC80 <= code <= 0xDCFF:
raise exc
encoded.append(chr(code - 0xDC00))
return (''.join(encoded), exc.end)
else:
raise exc
def register():
"""Register the surrogateescape error handler if it doesn't exist
"""
try:
codecs.lookup_error('surrogateescape')
except LookupError:
codecs.register_error('surrogateescape', surrogateescape)
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