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bpo-42208: Add _locale._get_locale_encoding() (GH-23052)

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* Add a new _locale._get_locale_encoding() function to get the
  current locale encoding.
* Modify locale.getpreferredencoding() to use it.
* Remove the _bootlocale module.
This commit is contained in:
Victor Stinner 2020-10-31 01:32:11 +01:00 • committed by GitHub
parent 710e826307
commit b62bdf71ea
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 86 additions and 103 deletions
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84
Lib/locale.py
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@ -619,53 +619,49 @@ def resetlocale(category=LC_ALL):
"""
_setlocale(category, _build_localename(getdefaultlocale()))
if sys.platform.startswith("win"):
# On Win32, this will return the ANSI code page
def getpreferredencoding(do_setlocale = True):
"""Return the charset that the user is likely using."""
if sys.flags.utf8_mode:
return 'UTF-8'
import _bootlocale
return _bootlocale.getpreferredencoding(False)
else:
# On Unix, if CODESET is available, use that.
try:
CODESET
except NameError:
try:
from _locale import _get_locale_encoding
except ImportError:
def _get_locale_encoding():
if hasattr(sys, 'getandroidapilevel'):
# On Android langinfo.h and CODESET are missing, and UTF-8 is
# always used in mbstowcs() and wcstombs().
def getpreferredencoding(do_setlocale = True):
return 'UTF-8'
else:
# Fall back to parsing environment variables :-(
def getpreferredencoding(do_setlocale = True):
"""Return the charset that the user is likely using,
by looking at environment variables."""
if sys.flags.utf8_mode:
return 'UTF-8'
res = getdefaultlocale()[1]
if res is None:
# LANG not set, default conservatively to ASCII
res = 'ascii'
return res
else:
def getpreferredencoding(do_setlocale = True):
"""Return the charset that the user is likely using,
according to the system configuration."""
if sys.flags.utf8_mode:
return 'UTF-8'
import _bootlocale
if do_setlocale:
oldloc = setlocale(LC_CTYPE)
try:
setlocale(LC_CTYPE, "")
except Error:
pass
result = _bootlocale.getpreferredencoding(False)
if do_setlocale:
setlocale(LC_CTYPE, oldloc)
return result
return 'UTF-8'
if sys.flags.utf8_mode:
return 'UTF-8'
encoding = getdefaultlocale()[1]
if encoding is None:
# LANG not set, default conservatively to ASCII
encoding = 'ascii'
return encoding
try:
CODESET
except NameError:
def getpreferredencoding(do_setlocale=True):
"""Return the charset that the user is likely using."""
return _get_locale_encoding()
else:
# On Unix, if CODESET is available, use that.
def getpreferredencoding(do_setlocale=True):
"""Return the charset that the user is likely using,
according to the system configuration."""
if sys.flags.utf8_mode:
return 'UTF-8'
if not do_setlocale:
return _get_locale_encoding()
old_loc = setlocale(LC_CTYPE)
try:
try:
setlocale(LC_CTYPE, "")
except Error:
pass
return _get_locale_encoding()
finally:
setlocale(LC_CTYPE, old_loc)
### Database