Mercurial > hgrepos > Python > libs > ConfigMix

annotate configmix/compat.py @ 440:f297c23f78f0

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Optimize __getitem__() in jailed configurations: call base directly
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 10 Dec 2021 02:18:16 +0100
parents b96f49c9c76b
children d7f6f2afcee2
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1 # -*- coding: utf-8 -*-
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2 # :-
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3 # :Copyright: (c) 2015-2021, Franz Glasner. All rights reserved.
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4 # :License: BSD-3-Clause. See LICENSE.txt for details.
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5 # :-
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6 """Some minimal compatibility shim between Python2 and Python3
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7
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8 """
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9
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10 from __future__ import division, absolute_import, print_function
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11
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13 __all__ = ["PY2",
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14 "text_to_native_os_str",
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15 "native_os_str_to_text",
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16 "u",
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17 "u2fs",
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18 "uchr",
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19 "n"]
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21
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22 import sys
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23 import os
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24 import locale
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26
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27 PY2 = sys.version_info[0] <= 2
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30 if PY2:
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31
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32 _OS_ENCODING = locale.getpreferredencoding()
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33
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34 _FS_ENCODING = sys.getfilesystemencoding() or _OS_ENCODING
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35
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36
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37 def text_to_native_os_str(s, encoding=None):
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38 if isinstance(s, unicode): # noqa: F821
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39 return s.encode(encoding or _OS_ENCODING)
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40 else:
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41 return s
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43
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44 def native_os_str_to_text(s, encoding=None):
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45 return s.decode(encoding or _OS_ENCODING)
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46
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48 def u(s, encoding="utf-8"):
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49 if isinstance(s, unicode): # noqa: F821
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50 return s
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51 else:
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52 return s.decode(encoding)
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53
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55 def u2fs(s, force=False):
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56 """Convert a text (Unicode) string to the filesystem encoding.
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57
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58 .. note:: The filesystem encoding on Python 3 is a Unicode text
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59 string. The function is a noop when called on Python 3.
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61 .. note:: If `s` is already a byte string be permissive and
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62 return `s` unchanged.
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64 """
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65 if isinstance(s, str):
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66 return s
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67 if not force and os.name in ("nt", "ce"):
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68 # WinNT and CE have native Unicode support: nothing to convert
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69 return s
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70 return s.encode(_FS_ENCODING)
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71
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72 def uchr(n):
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73 return unichr(n) # noqa: F821
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75 def n(s, encoding="utf-8"):
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76 if isinstance(s, str):
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77 return s
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78 else:
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79 return s.encode(encoding)
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81 else:
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82
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83 def text_to_native_os_str(s, encoding=None):
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84 return s
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87 def native_os_str_to_text(s, encoding=None):
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88 return s
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91 def u(s, encoding="utf-8"):
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92 if isinstance(s, str):
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93 return s
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94 else:
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95 return s.decode(encoding)
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97
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98 def u2fs(s, force=False):
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99 """Convert a text (Unicode) string to the filesystem encoding.
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100
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101 .. note:: The filesystem encoding on Python 3 is a Unicode text
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102 string. The function is a noop when called on Python 3.
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103
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104 .. note:: If `s` is already a byte string be permissive and
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105 return `s` unchanged.
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106
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107 """
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108 assert isinstance(s, str)
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109 return s
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110
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111 def uchr(n):
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112 return chr(n)
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113
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114 def n(s, encoding="utf-8"):
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115 if isinstance(s, str):
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116 return s
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117 else:
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118 return s.decode(encoding)