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# Copyright (c) 2015 SUSE Linux GmbH. All rights reserved.
#
# This file is part of kiwi.
#
# kiwi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# kiwi is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with kiwi. If not, see <http://www.gnu.org/licenses/>
#
import logging
# project
from kiwi.exceptions import KiwiDecodingError
log = logging.getLogger('kiwi')
class Codec:
"""
**Performs conversions of literal byte sequences to strings**
"""
@staticmethod
def decode(literal: bytes) -> str:
"""
Decodes the given literal with the default encoding. In
case of failure attemps to decode using utf-8 charset with
the 'replace' error strategy.
:param bytes literal: literal to decode
:return: decoded str
:rtype: str
"""
if literal is None:
return ''
try:
return Codec._wrapped_decode(literal)
except Exception:
log.warning("Failed decoding literal. Forcing UTF-8 decoding")
try:
return Codec._wrapped_decode(
literal, encoding='utf_8', error_handling_schema='replace'
)
except Exception:
raise KiwiDecodingError(
'Locale setup is not utf-8 compatible'
)
@staticmethod
def _wrapped_decode(
literal: bytes, encoding: str = '', error_handling_schema: str = ''
) -> str:
# This decode wrapper is only implemented to facilitate unit testing
if encoding:
return literal.decode(
encoding=encoding, errors=error_handling_schema
)
else:
return literal.decode()
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