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106 lines
3.4 KiB
106 lines
3.4 KiB
8 months ago
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# Copyright (c) 2006-2021 Andrey Golovizin
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""Unicode-aware IO routines."""
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from __future__ import absolute_import, unicode_literals
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import io
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import posixpath
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import sys
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from os import environ
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from pybtex.exceptions import PybtexError
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from pybtex.kpathsea import kpsewhich
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def get_default_encoding():
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return 'UTF-8'
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def get_stream_encoding(stream):
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stream_encoding = getattr(stream, 'encoding', None)
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return stream_encoding or get_default_encoding()
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def _decode_filename(filename, errors='strict'):
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"""Decode byte-encoded filename."""
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encoding = sys.getfilesystemencoding() or get_default_encoding()
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return filename.decode(encoding, errors=errors)
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def _open_existing(opener, filename, mode, locate, **kwargs):
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if not posixpath.isfile(filename):
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found = locate(filename)
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if found:
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filename = found
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return opener(filename, mode, **kwargs)
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def _open_or_create(opener, filename, mode, environ, **kwargs):
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try:
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return opener(filename, mode, **kwargs)
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except EnvironmentError as error:
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if 'TEXMFOUTPUT' in environ:
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new_filename = posixpath.join(environ['TEXMFOUTPUT'], filename)
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try:
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return opener(new_filename, mode, **kwargs)
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except EnvironmentError:
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pass
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raise error
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def _open(opener, filename_or_file, mode, **kwargs):
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if hasattr(filename_or_file, 'read') and hasattr(filename_or_file, 'close'):
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return filename_or_file
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else:
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filename = filename_or_file
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write_mode = 'w' in mode
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try:
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if write_mode:
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return _open_or_create(opener, filename, mode, environ, **kwargs)
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else:
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return _open_existing(opener, filename, mode, locate=kpsewhich, **kwargs)
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except EnvironmentError as error:
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raise PybtexError("unable to open %s. %s" % (filename, error.strerror))
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def open_raw(filename, mode='rb', encoding=None):
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return _open(io.open, filename, mode)
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def open_unicode(filename, mode='r', encoding=None):
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if encoding is None:
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encoding = get_default_encoding()
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return _open(io.open, filename, mode, encoding=encoding)
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def reader(stream, encoding=None, errors='strict'):
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if encoding is None:
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encoding = get_stream_encoding(stream)
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return io.TextIOWrapper(stream, encoding=encoding, errors=errors)
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stdout = sys.stdout
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stderr = sys.stderr
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