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# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import io
import warnings
from .homoglyphs import homoglyphs
from .replacements import replacements
_replacements = {uni: asc for uni, asc in replacements}
_homoglyphs = {g: asc for asc, glyphs in homoglyphs.items() for g in glyphs}
def unidecoder(s, homoglyphs=False):
"""Transliterate unicode
Args:
s (str): unicode string
homoglyphs (bool): prioritize translating to homoglyphs
"""
warned = False # Once per utterance
ret = ''
for u in s:
if ord(u) < 127:
a = u
elif homoglyphs:
a = _homoglyphs.get(u, _replacements.get(u, None))
else:
a = _replacements.get(u, _homoglyphs.get(u, None))
if a is None:
if not warned:
warnings.warn(f'Unexpected character {u}: '
'please revise your text cleaning rules.',
stacklevel=10**6)
warned = True
else:
ret += a
return ret
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