annotate mercurial/encoding.py @ 35350:82ee401135dd

py3: handle keyword arguments correctly in cmdutil.py Differential Revision: https://phab.mercurial-scm.org/D1626
author Pulkit Goyal <7895pulkit@gmail.com>
date Sun, 10 Dec 2017 04:45:10 +0530
parents aa877860d4d7
children 3696efeab66f
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1 # encoding.py - character transcoding support for Mercurial
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2 #
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import, print_function
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9
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10 import io
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11 import locale
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12 import os
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13 import unicodedata
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14
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15 from . import (
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16 error,
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17 policy,
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18 pycompat,
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19 )
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20
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21 from .pure import (
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22 charencode as charencodepure,
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23 )
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24
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25 charencode = policy.importmod(r'charencode')
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26
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27 isasciistr = charencode.isasciistr
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28 asciilower = charencode.asciilower
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29 asciiupper = charencode.asciiupper
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30 _jsonescapeu8fast = charencode.jsonescapeu8fast
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31
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32 _sysstr = pycompat.sysstr
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33
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34 if pycompat.ispy3:
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35 unichr = chr
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36
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37 # These unicode characters are ignored by HFS+ (Apple Technote 1150,
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38 # "Unicode Subtleties"), so we need to ignore them in some places for
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39 # sanity.
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40 _ignore = [unichr(int(x, 16)).encode("utf-8") for x in
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41 "200c 200d 200e 200f 202a 202b 202c 202d 202e "
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42 "206a 206b 206c 206d 206e 206f feff".split()]
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43 # verify the next function will work
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44 assert all(i.startswith(("\xe2", "\xef")) for i in _ignore)
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45
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46 def hfsignoreclean(s):
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47 """Remove codepoints ignored by HFS+ from s.
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48
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49 >>> hfsignoreclean(u'.h\u200cg'.encode('utf-8'))
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50 '.hg'
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51 >>> hfsignoreclean(u'.h\ufeffg'.encode('utf-8'))
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52 '.hg'
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53 """
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54 if "\xe2" in s or "\xef" in s:
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55 for c in _ignore:
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56 s = s.replace(c, '')
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57 return s
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58
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59 # encoding.environ is provided read-only, which may not be used to modify
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60 # the process environment
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61 _nativeenviron = (not pycompat.ispy3 or os.supports_bytes_environ)
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62 if not pycompat.ispy3:
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63 environ = os.environ # re-exports
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64 elif _nativeenviron:
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65 environ = os.environb # re-exports
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66 else:
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67 # preferred encoding isn't known yet; use utf-8 to avoid unicode error
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68 # and recreate it once encoding is settled
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69 environ = dict((k.encode(u'utf-8'), v.encode(u'utf-8'))
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70 for k, v in os.environ.items()) # re-exports
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71
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72 _encodingfixers = {
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73 '646': lambda: 'ascii',
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74 'ANSI_X3.4-1968': lambda: 'ascii',
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75 }
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76
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77 try:
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78 encoding = environ.get("HGENCODING")
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79 if not encoding:
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80 encoding = locale.getpreferredencoding().encode('ascii') or 'ascii'
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81 encoding = _encodingfixers.get(encoding, lambda: encoding)()
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82 except locale.Error:
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83 encoding = 'ascii'
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84 encodingmode = environ.get("HGENCODINGMODE", "strict")
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85 fallbackencoding = 'ISO-8859-1'
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86
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87 class localstr(bytes):
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88 '''This class allows strings that are unmodified to be
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89 round-tripped to the local encoding and back'''
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90 def __new__(cls, u, l):
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91 s = bytes.__new__(cls, l)
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92 s._utf8 = u
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93 return s
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94 def __hash__(self):
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95 return hash(self._utf8) # avoid collisions in local string space
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96
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97 def tolocal(s):
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98 """
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99 Convert a string from internal UTF-8 to local encoding
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100
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101 All internal strings should be UTF-8 but some repos before the
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102 implementation of locale support may contain latin1 or possibly
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103 other character sets. We attempt to decode everything strictly
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104 using UTF-8, then Latin-1, and failing that, we use UTF-8 and
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105 replace unknown characters.
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106
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107 The localstr class is used to cache the known UTF-8 encoding of
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108 strings next to their local representation to allow lossless
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109 round-trip conversion back to UTF-8.
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110
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111 >>> u = b'foo: \\xc3\\xa4' # utf-8
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112 >>> l = tolocal(u)
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113 >>> l
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114 'foo: ?'
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115 >>> fromlocal(l)
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116 'foo: \\xc3\\xa4'
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117 >>> u2 = b'foo: \\xc3\\xa1'
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118 >>> d = { l: 1, tolocal(u2): 2 }
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119 >>> len(d) # no collision
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120 2
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121 >>> b'foo: ?' in d
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122 False
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123 >>> l1 = b'foo: \\xe4' # historical latin1 fallback
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124 >>> l = tolocal(l1)
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125 >>> l
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126 'foo: ?'
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127 >>> fromlocal(l) # magically in utf-8
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128 'foo: \\xc3\\xa4'
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129 """
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diff changeset
130
33927
853574db5b12 encoding: add fast path of from/tolocal() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33926
diff changeset
131 if isasciistr(s):
853574db5b12 encoding: add fast path of from/tolocal() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33926
diff changeset
132 return s
853574db5b12 encoding: add fast path of from/tolocal() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33926
diff changeset
133
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
134 try:
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
135 try:
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
136 # make sure string is actually stored in UTF-8
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
137 u = s.decode('UTF-8')
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
138 if encoding == 'UTF-8':
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
139 # fast path
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
140 return s
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
141 r = u.encode(_sysstr(encoding), u"replace")
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
142 if u == r.decode(_sysstr(encoding)):
13940
b7b26e54e37a encoding: avoid localstr when a string can be encoded losslessly (issue2763)
Matt Mackall <mpm@selenic.com>
parents: 13051
diff changeset
143 # r is a safe, non-lossy encoding of s
b7b26e54e37a encoding: avoid localstr when a string can be encoded losslessly (issue2763)
Matt Mackall <mpm@selenic.com>
parents: 13051
diff changeset
144 return r
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
145 return localstr(s, r)
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
146 except UnicodeDecodeError:
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
147 # we should only get here if we're looking at an ancient changeset
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
148 try:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
149 u = s.decode(_sysstr(fallbackencoding))
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
150 r = u.encode(_sysstr(encoding), u"replace")
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
151 if u == r.decode(_sysstr(encoding)):
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
152 # r is a safe, non-lossy encoding of s
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
153 return r
13940
b7b26e54e37a encoding: avoid localstr when a string can be encoded losslessly (issue2763)
Matt Mackall <mpm@selenic.com>
parents: 13051
diff changeset
154 return localstr(u.encode('UTF-8'), r)
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
155 except UnicodeDecodeError:
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
156 u = s.decode("utf-8", "replace") # last ditch
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
157 # can't round-trip
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
158 return u.encode(_sysstr(encoding), u"replace")
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24608
diff changeset
159 except LookupError as k:
16274
5d75eb8568d1 encoding: tune fast-path of tolocal a bit
Matt Mackall <mpm@selenic.com>
parents: 16133
diff changeset
160 raise error.Abort(k, hint="please check your locale settings")
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
161
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
162 def fromlocal(s):
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
163 """
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
164 Convert a string from the local character encoding to UTF-8
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
165
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
166 We attempt to decode strings using the encoding mode set by
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
167 HGENCODINGMODE, which defaults to 'strict'. In this mode, unknown
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
168 characters will cause an error message. Other modes include
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
169 'replace', which replaces unknown characters with a special
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
170 Unicode character, and 'ignore', which drops the character.
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
171 """
13046
7cc4263e07a9 encoding: add localstr class to track UTF-8 version of transcoded strings
Matt Mackall <mpm@selenic.com>
parents: 12866
diff changeset
172
7cc4263e07a9 encoding: add localstr class to track UTF-8 version of transcoded strings
Matt Mackall <mpm@selenic.com>
parents: 12866
diff changeset
173 # can we do a lossless round-trip?
7cc4263e07a9 encoding: add localstr class to track UTF-8 version of transcoded strings
Matt Mackall <mpm@selenic.com>
parents: 12866
diff changeset
174 if isinstance(s, localstr):
7cc4263e07a9 encoding: add localstr class to track UTF-8 version of transcoded strings
Matt Mackall <mpm@selenic.com>
parents: 12866
diff changeset
175 return s._utf8
33927
853574db5b12 encoding: add fast path of from/tolocal() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33926
diff changeset
176 if isasciistr(s):
853574db5b12 encoding: add fast path of from/tolocal() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33926
diff changeset
177 return s
13046
7cc4263e07a9 encoding: add localstr class to track UTF-8 version of transcoded strings
Matt Mackall <mpm@selenic.com>
parents: 12866
diff changeset
178
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
179 try:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
180 u = s.decode(_sysstr(encoding), _sysstr(encodingmode))
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
181 return u.encode("utf-8")
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24608
diff changeset
182 except UnicodeDecodeError as inst:
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10263
diff changeset
183 sub = s[max(0, inst.start - 10):inst.start + 10]
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
184 raise error.Abort("decoding near '%s': %s!" % (sub, inst))
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24608
diff changeset
185 except LookupError as k:
15769
afdf4f5bac61 encoding: use hint markup for "please check your locale settings"
Mads Kiilerich <mads@kiilerich.com>
parents: 15672
diff changeset
186 raise error.Abort(k, hint="please check your locale settings")
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
187
31447
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
188 def unitolocal(u):
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
189 """Convert a unicode string to a byte string of local encoding"""
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
190 return tolocal(u.encode('utf-8'))
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
191
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
192 def unifromlocal(s):
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
193 """Convert a byte string of local encoding to a unicode string"""
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
194 return fromlocal(s).decode('utf-8')
067add650129 encoding: factor out unicode variants of from/tolocal()
Yuya Nishihara <yuya@tcha.org>
parents: 30622
diff changeset
195
33022
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
196 def unimethod(bytesfunc):
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
197 """Create a proxy method that forwards __unicode__() and __str__() of
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
198 Python 3 to __bytes__()"""
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
199 def unifunc(obj):
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
200 return unifromlocal(bytesfunc(obj))
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
201 return unifunc
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
202
31448
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
203 # converter functions between native str and byte string. use these if the
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
204 # character encoding is not aware (e.g. exception message) or is known to
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
205 # be locale dependent (e.g. date formatting.)
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
206 if pycompat.ispy3:
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
207 strtolocal = unitolocal
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
208 strfromlocal = unifromlocal
33022
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
209 strmethod = unimethod
31448
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
210 else:
31774
7d2cbe11ae48 pycompat: introduce identity function as a compat stub
Yuya Nishihara <yuya@tcha.org>
parents: 31448
diff changeset
211 strtolocal = pycompat.identity
7d2cbe11ae48 pycompat: introduce identity function as a compat stub
Yuya Nishihara <yuya@tcha.org>
parents: 31448
diff changeset
212 strfromlocal = pycompat.identity
33022
ce96efec8112 py3: add utility to forward __str__() to __bytes__()
Yuya Nishihara <yuya@tcha.org>
parents: 32537
diff changeset
213 strmethod = pycompat.identity
31448
6419cd243017 encoding: add converter between native str and byte string
Yuya Nishihara <yuya@tcha.org>
parents: 31447
diff changeset
214
30034
e4a6b439acc5 py3: provide encoding.environ which is a dict of bytes
Yuya Nishihara <yuya@tcha.org>
parents: 30033
diff changeset
215 if not _nativeenviron:
e4a6b439acc5 py3: provide encoding.environ which is a dict of bytes
Yuya Nishihara <yuya@tcha.org>
parents: 30033
diff changeset
216 # now encoding and helper functions are available, recreate the environ
e4a6b439acc5 py3: provide encoding.environ which is a dict of bytes
Yuya Nishihara <yuya@tcha.org>
parents: 30033
diff changeset
217 # dict to be exported to other modules
e4a6b439acc5 py3: provide encoding.environ which is a dict of bytes
Yuya Nishihara <yuya@tcha.org>
parents: 30033
diff changeset
218 environ = dict((tolocal(k.encode(u'utf-8')), tolocal(v.encode(u'utf-8')))
32184
cf424dae5dc7 check-code: ignore re-exports of os.environ in encoding.py
Yuya Nishihara <yuya@tcha.org>
parents: 32156
diff changeset
219 for k, v in os.environ.items()) # re-exports
30034
e4a6b439acc5 py3: provide encoding.environ which is a dict of bytes
Yuya Nishihara <yuya@tcha.org>
parents: 30033
diff changeset
220
12866
eddc20306ab6 encoding: default ambiguous character to narrow
Matt Mackall <mpm@selenic.com>
parents: 12770
diff changeset
221 # How to treat ambiguous-width characters. Set to 'wide' to treat as wide.
32537
044f3d7eb9ae encoding: make sure "wide" variable never be referenced from other modules
Yuya Nishihara <yuya@tcha.org>
parents: 32529
diff changeset
222 _wide = _sysstr(environ.get("HGENCODINGAMBIGUOUS", "narrow") == "wide"
044f3d7eb9ae encoding: make sure "wide" variable never be referenced from other modules
Yuya Nishihara <yuya@tcha.org>
parents: 32529
diff changeset
223 and "WFA" or "WF")
12866
eddc20306ab6 encoding: default ambiguous character to narrow
Matt Mackall <mpm@selenic.com>
parents: 12770
diff changeset
224
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
225 def colwidth(s):
15142
176882876780 encoding: colwidth input is in the local encoding
Matt Mackall <mpm@selenic.com>
parents: 15066
diff changeset
226 "Find the column width of a string for display in the local encoding"
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
227 return ucolwidth(s.decode(_sysstr(encoding), u'replace'))
15066
24efa83d81cb i18n: calculate terminal columns by width information of each characters
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 14951
diff changeset
228
24efa83d81cb i18n: calculate terminal columns by width information of each characters
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 14951
diff changeset
229 def ucolwidth(d):
24efa83d81cb i18n: calculate terminal columns by width information of each characters
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 14951
diff changeset
230 "Find the column width of a Unicode string for display"
14951
61807854004e encoding: use getattr isntead of hasattr
Augie Fackler <durin42@gmail.com>
parents: 14069
diff changeset
231 eaw = getattr(unicodedata, 'east_asian_width', None)
61807854004e encoding: use getattr isntead of hasattr
Augie Fackler <durin42@gmail.com>
parents: 14069
diff changeset
232 if eaw is not None:
32537
044f3d7eb9ae encoding: make sure "wide" variable never be referenced from other modules
Yuya Nishihara <yuya@tcha.org>
parents: 32529
diff changeset
233 return sum([eaw(c) in _wide and 2 or 1 for c in d])
7948
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
234 return len(d)
de377b1a9a84 move encoding bits from util to encoding
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
235
15143
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
236 def getcols(s, start, c):
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
237 '''Use colwidth to find a c-column substring of s starting at byte
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
238 index start'''
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
239 for x in xrange(start + c, len(s)):
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
240 t = s[start:x]
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
241 if colwidth(t) == c:
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
242 return t
16c129b0f465 encoding: add getcols to extract substrings based on column width
Matt Mackall <mpm@selenic.com>
parents: 15142
diff changeset
243
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
244 def trim(s, width, ellipsis='', leftside=False):
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
245 """Trim string 's' to at most 'width' columns (including 'ellipsis').
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
246
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
247 If 'leftside' is True, left side of string 's' is trimmed.
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
248 'ellipsis' is always placed at trimmed side.
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
249
34136
414a3513c2bd doctest: do not embed non-ascii characters in docstring
Yuya Nishihara <yuya@tcha.org>
parents: 34135
diff changeset
250 >>> from .node import bin
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
251 >>> def bprint(s):
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
252 ... print(pycompat.sysstr(s))
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
253 >>> ellipsis = b'+++'
27355
b479fc425a81 encoding: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents: 26963
diff changeset
254 >>> from . import encoding
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
255 >>> encoding.encoding = b'utf-8'
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
256 >>> t = b'1234567890'
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
257 >>> bprint(trim(t, 12, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
258 1234567890
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
259 >>> bprint(trim(t, 10, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
260 1234567890
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
261 >>> bprint(trim(t, 8, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
262 12345+++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
263 >>> bprint(trim(t, 8, ellipsis=ellipsis, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
264 +++67890
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
265 >>> bprint(trim(t, 8))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
266 12345678
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
267 >>> bprint(trim(t, 8, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
268 34567890
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
269 >>> bprint(trim(t, 3, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
270 +++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
271 >>> bprint(trim(t, 1, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
272 +
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
273 >>> u = u'\u3042\u3044\u3046\u3048\u304a' # 2 x 5 = 10 columns
34135
e9e225f16932 doctest: pass encoding name as system string
Yuya Nishihara <yuya@tcha.org>
parents: 34131
diff changeset
274 >>> t = u.encode(pycompat.sysstr(encoding.encoding))
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
275 >>> bprint(trim(t, 12, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
276 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
277 >>> bprint(trim(t, 10, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
278 \xe3\x81\x82\xe3\x81\x84\xe3\x81\x86\xe3\x81\x88\xe3\x81\x8a
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
279 >>> bprint(trim(t, 8, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
280 \xe3\x81\x82\xe3\x81\x84+++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
281 >>> bprint(trim(t, 8, ellipsis=ellipsis, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
282 +++\xe3\x81\x88\xe3\x81\x8a
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
283 >>> bprint(trim(t, 5))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
284 \xe3\x81\x82\xe3\x81\x84
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
285 >>> bprint(trim(t, 5, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
286 \xe3\x81\x88\xe3\x81\x8a
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
287 >>> bprint(trim(t, 4, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
288 +++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
289 >>> bprint(trim(t, 4, ellipsis=ellipsis, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
290 +++
34136
414a3513c2bd doctest: do not embed non-ascii characters in docstring
Yuya Nishihara <yuya@tcha.org>
parents: 34135
diff changeset
291 >>> t = bin(b'112233445566778899aa') # invalid byte sequence
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
292 >>> bprint(trim(t, 12, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
293 \x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
294 >>> bprint(trim(t, 10, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
295 \x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
296 >>> bprint(trim(t, 8, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
297 \x11\x22\x33\x44\x55+++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
298 >>> bprint(trim(t, 8, ellipsis=ellipsis, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
299 +++\x66\x77\x88\x99\xaa
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
300 >>> bprint(trim(t, 8))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
301 \x11\x22\x33\x44\x55\x66\x77\x88
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
302 >>> bprint(trim(t, 8, leftside=True))
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
303 \x33\x44\x55\x66\x77\x88\x99\xaa
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
304 >>> bprint(trim(t, 3, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
305 +++
34137
a8994d08e4a2 doctest: use print_function and convert bytes to unicode where needed
Yuya Nishihara <yuya@tcha.org>
parents: 34136
diff changeset
306 >>> bprint(trim(t, 1, ellipsis=ellipsis))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
307 +
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
308 """
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
309 try:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
310 u = s.decode(_sysstr(encoding))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
311 except UnicodeDecodeError:
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
312 if len(s) <= width: # trimming is not needed
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
313 return s
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
314 width -= len(ellipsis)
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
315 if width <= 0: # no enough room even for ellipsis
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
316 return ellipsis[:width + len(ellipsis)]
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
317 if leftside:
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
318 return ellipsis + s[-width:]
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
319 return s[:width] + ellipsis
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
320
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
321 if ucolwidth(u) <= width: # trimming is not needed
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
322 return s
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
323
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
324 width -= len(ellipsis)
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
325 if width <= 0: # no enough room even for ellipsis
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
326 return ellipsis[:width + len(ellipsis)]
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
327
21861
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
328 if leftside:
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
329 uslice = lambda i: u[i:]
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
330 concat = lambda s: ellipsis + s
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
331 else:
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
332 uslice = lambda i: u[:-i]
b515c3a63e96 encoding: add 'leftside' argument into 'trim' to switch trimming side
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 21856
diff changeset
333 concat = lambda s: s + ellipsis
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
334 for i in xrange(1, len(u)):
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
335 usub = uslice(i)
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
336 if ucolwidth(usub) <= width:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
337 return concat(usub.encode(_sysstr(encoding)))
21856
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
338 return ellipsis # no enough room for multi-column characters
d24969ee272f encoding: add 'trim' to trim multi-byte characters at most specified columns
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18378
diff changeset
339
14069
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
340 def lower(s):
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
341 "best-effort encoding-aware case-folding of local string s"
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
342 try:
22779
d9585dda63c3 encoding.lower: use fast ASCII lower
Siddharth Agarwal <sid0@fb.com>
parents: 22778
diff changeset
343 return asciilower(s)
17235
3745ae495ce5 encoding: use s.decode to trigger UnicodeDecodeError
Martin Geisler <mg@aragost.com>
parents: 16493
diff changeset
344 except UnicodeDecodeError:
16387
c481761033bd encoding: add fast-path for ASCII lowercase
Matt Mackall <mpm@selenic.com>
parents: 16274
diff changeset
345 pass
c481761033bd encoding: add fast-path for ASCII lowercase
Matt Mackall <mpm@selenic.com>
parents: 16274
diff changeset
346 try:
14069
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
347 if isinstance(s, localstr):
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
348 u = s._utf8.decode("utf-8")
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
349 else:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
350 u = s.decode(_sysstr(encoding), _sysstr(encodingmode))
14069
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
351
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
352 lu = u.lower()
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
353 if u == lu:
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
354 return s # preserve localstring
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
355 return lu.encode(_sysstr(encoding))
14069
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
356 except UnicodeError:
e38846a79a23 encoding: add an encoding-aware lower function
Matt Mackall <mpm@selenic.com>
parents: 13940
diff changeset
357 return s.lower() # we don't know how to fold this except in ASCII
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24608
diff changeset
358 except LookupError as k:
15672
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
359 raise error.Abort(k, hint="please check your locale settings")
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
360
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
361 def upper(s):
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
362 "best-effort encoding-aware case-folding of local string s"
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
363 try:
24578
ac08de78de7f encoding: use parsers.asciiupper when available
Siddharth Agarwal <sid0@fb.com>
parents: 23596
diff changeset
364 return asciiupper(s)
17236
9fb8312dbdbd encoding: add fast-path for ASCII uppercase.
Martin Geisler <mg@aragost.com>
parents: 17235
diff changeset
365 except UnicodeDecodeError:
24597
b4258d5a1600 encoding.upper: factor out fallback code
Siddharth Agarwal <sid0@fb.com>
parents: 24593
diff changeset
366 return upperfallback(s)
b4258d5a1600 encoding.upper: factor out fallback code
Siddharth Agarwal <sid0@fb.com>
parents: 24593
diff changeset
367
b4258d5a1600 encoding.upper: factor out fallback code
Siddharth Agarwal <sid0@fb.com>
parents: 24593
diff changeset
368 def upperfallback(s):
17236
9fb8312dbdbd encoding: add fast-path for ASCII uppercase.
Martin Geisler <mg@aragost.com>
parents: 17235
diff changeset
369 try:
15672
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
370 if isinstance(s, localstr):
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
371 u = s._utf8.decode("utf-8")
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
372 else:
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
373 u = s.decode(_sysstr(encoding), _sysstr(encodingmode))
15672
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
374
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
375 uu = u.upper()
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
376 if u == uu:
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
377 return s # preserve localstring
30033
02dbfaa6df0b py3: convert encoding name and mode to str
Yuya Nishihara <yuya@tcha.org>
parents: 30030
diff changeset
378 return uu.encode(_sysstr(encoding))
15672
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
379 except UnicodeError:
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
380 return s.upper() # we don't know how to fold this except in ASCII
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24608
diff changeset
381 except LookupError as k:
15672
2ebe3d0ce91d i18n: use encoding.lower/upper for encoding aware case folding
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15143
diff changeset
382 raise error.Abort(k, hint="please check your locale settings")
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
383
24593
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
384 class normcasespecs(object):
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
385 '''what a platform's normcase does to ASCII strings
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
386
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
387 This is specified per platform, and should be consistent with what normcase
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
388 on that platform actually does.
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
389
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
390 lower: normcase lowercases ASCII strings
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
391 upper: normcase uppercases ASCII strings
24608
1c533e23ce95 util.h: define an enum for normcase specs
Siddharth Agarwal <sid0@fb.com>
parents: 24597
diff changeset
392 other: the fallback function should always be called
1c533e23ce95 util.h: define an enum for normcase specs
Siddharth Agarwal <sid0@fb.com>
parents: 24597
diff changeset
393
1c533e23ce95 util.h: define an enum for normcase specs
Siddharth Agarwal <sid0@fb.com>
parents: 24597
diff changeset
394 This should be kept in sync with normcase_spec in util.h.'''
24593
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
395 lower = -1
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
396 upper = 1
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
397 other = 0
f473a1fe5c7c encoding: define an enum that specifies what normcase does to ASCII strings
Siddharth Agarwal <sid0@fb.com>
parents: 24578
diff changeset
398
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
399 def jsonescape(s, paranoid=False):
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
400 '''returns a string suitable for JSON
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
401
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
402 JSON is problematic for us because it doesn't support non-Unicode
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
403 bytes. To deal with this, we take the following approach:
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
404
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
405 - localstr objects are converted back to UTF-8
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
406 - valid UTF-8/ASCII strings are passed as-is
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
407 - other strings are converted to UTF-8b surrogate encoding
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
408 - apply JSON-specified string escaping
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
409
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
410 (escapes are doubled in these tests)
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
411
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
412 >>> jsonescape(b'this is a test')
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
413 'this is a test'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
414 >>> jsonescape(b'escape characters: \\0 \\x0b \\x7f')
27881
ffa599f3f503 encoding: escape U+007F (DEL) character in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 27699
diff changeset
415 'escape characters: \\\\u0000 \\\\u000b \\\\u007f'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
416 >>> jsonescape(b'escape characters: \\b \\t \\n \\f \\r \\" \\\\')
33925
2c37f9dabc32 encoding: add fast path of jsonescape() (issue5533)
Yuya Nishihara <yuya@tcha.org>
parents: 33924
diff changeset
417 'escape characters: \\\\b \\\\t \\\\n \\\\f \\\\r \\\\" \\\\\\\\'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
418 >>> jsonescape(b'a weird byte: \\xdd')
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
419 'a weird byte: \\xed\\xb3\\x9d'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
420 >>> jsonescape(b'utf-8: caf\\xc3\\xa9')
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
421 'utf-8: caf\\xc3\\xa9'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
422 >>> jsonescape(b'')
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
423 ''
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
424
28069
b2d24c2898f9 encoding: backport paranoid escaping from templatefilters.jsonescape()
Yuya Nishihara <yuya@tcha.org>
parents: 28068
diff changeset
425 If paranoid, non-ascii and common troublesome characters are also escaped.
b2d24c2898f9 encoding: backport paranoid escaping from templatefilters.jsonescape()
Yuya Nishihara <yuya@tcha.org>
parents: 28068
diff changeset
426 This is suitable for web output.
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
427
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
428 >>> s = b'escape characters: \\0 \\x0b \\x7f'
33925
2c37f9dabc32 encoding: add fast path of jsonescape() (issue5533)
Yuya Nishihara <yuya@tcha.org>
parents: 33924
diff changeset
429 >>> assert jsonescape(s) == jsonescape(s, paranoid=True)
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
430 >>> s = b'escape characters: \\b \\t \\n \\f \\r \\" \\\\'
33925
2c37f9dabc32 encoding: add fast path of jsonescape() (issue5533)
Yuya Nishihara <yuya@tcha.org>
parents: 33924
diff changeset
431 >>> assert jsonescape(s) == jsonescape(s, paranoid=True)
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
432 >>> jsonescape(b'escape boundary: \\x7e \\x7f \\xc2\\x80', paranoid=True)
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
433 'escape boundary: ~ \\\\u007f \\\\u0080'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
434 >>> jsonescape(b'a weird byte: \\xdd', paranoid=True)
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
435 'a weird byte: \\\\udcdd'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
436 >>> jsonescape(b'utf-8: caf\\xc3\\xa9', paranoid=True)
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
437 'utf-8: caf\\\\u00e9'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
438 >>> jsonescape(b'non-BMP: \\xf0\\x9d\\x84\\x9e', paranoid=True)
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
439 'non-BMP: \\\\ud834\\\\udd1e'
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
440 >>> jsonescape(b'<foo@example.org>', paranoid=True)
28069
b2d24c2898f9 encoding: backport paranoid escaping from templatefilters.jsonescape()
Yuya Nishihara <yuya@tcha.org>
parents: 28068
diff changeset
441 '\\\\u003cfoo@example.org\\\\u003e'
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
442 '''
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
443
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
444 u8chars = toutf8b(s)
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
445 try:
33924
b9101467d88b encoding: extract stub for fast JSON escape
Yuya Nishihara <yuya@tcha.org>
parents: 33852
diff changeset
446 return _jsonescapeu8fast(u8chars, paranoid)
b9101467d88b encoding: extract stub for fast JSON escape
Yuya Nishihara <yuya@tcha.org>
parents: 33852
diff changeset
447 except ValueError:
28068
9ece901f7a19 encoding: add option to escape non-ascii characters in JSON
Yuya Nishihara <yuya@tcha.org>
parents: 28067
diff changeset
448 pass
33924
b9101467d88b encoding: extract stub for fast JSON escape
Yuya Nishihara <yuya@tcha.org>
parents: 33852
diff changeset
449 return charencodepure.jsonescapeu8fallback(u8chars, paranoid)
22426
f6b533e64ed6 encoding: add json escaping filter
Matt Mackall <mpm@selenic.com>
parents: 22425
diff changeset
450
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
451 # We need to decode/encode U+DCxx codes transparently since invalid UTF-8
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
452 # bytes are mapped to that range.
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
453 if pycompat.ispy3:
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
454 _utf8strict = r'surrogatepass'
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
455 else:
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
456 _utf8strict = r'strict'
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
457
26875
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
458 _utf8len = [0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 4]
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
459
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
460 def getutf8char(s, pos):
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
461 '''get the next full utf-8 character in the given string, starting at pos
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
462
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
463 Raises a UnicodeError if the given location does not start a valid
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
464 utf-8 character.
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
465 '''
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
466
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
467 # find how many bytes to attempt decoding from first nibble
34200
112f118ecb00 encoding: ensure getutf8char always returns a bytestr, never an int
Augie Fackler <raf@durin42.com>
parents: 34137
diff changeset
468 l = _utf8len[ord(s[pos:pos + 1]) >> 4]
26875
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
469 if not l: # ascii
34200
112f118ecb00 encoding: ensure getutf8char always returns a bytestr, never an int
Augie Fackler <raf@durin42.com>
parents: 34137
diff changeset
470 return s[pos:pos + 1]
26875
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
471
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
472 c = s[pos:pos + l]
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
473 # validate with attempted decode
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
474 c.decode("utf-8", _utf8strict)
26875
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
475 return c
cf47bdb2183c encoding: add getutf8char helper
Matt Mackall <mpm@selenic.com>
parents: 25660
diff changeset
476
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
477 def toutf8b(s):
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
478 '''convert a local, possibly-binary string into UTF-8b
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
479
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
480 This is intended as a generic method to preserve data when working
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
481 with schemes like JSON and XML that have no provision for
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
482 arbitrary byte strings. As Mercurial often doesn't know
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
483 what encoding data is in, we use so-called UTF-8b.
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
484
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
485 If a string is already valid UTF-8 (or ASCII), it passes unmodified.
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
486 Otherwise, unsupported bytes are mapped to UTF-16 surrogate range,
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
487 uDC00-uDCFF.
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
488
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
489 Principles of operation:
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
490
17424
e7cfe3587ea4 fix trivial spelling errors
Mads Kiilerich <mads@kiilerich.com>
parents: 17236
diff changeset
491 - ASCII and UTF-8 data successfully round-trips and is understood
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
492 by Unicode-oriented clients
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
493 - filenames and file contents in arbitrary other encodings can have
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
494 be round-tripped or recovered by clueful clients
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
495 - local strings that have a cached known UTF-8 encoding (aka
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
496 localstr) get sent as UTF-8 so Unicode-oriented clients get the
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
497 Unicode data they want
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
498 - because we must preserve UTF-8 bytestring in places such as
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
499 filenames, metadata can't be roundtripped without help
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
500
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
501 (Note: "UTF-8b" often refers to decoding a mix of valid UTF-8 and
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
502 arbitrary bytes into an internal Unicode format that can be
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
503 re-encoded back into the original. Here we are exposing the
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
504 internal surrogate encoding as a UTF-8 string.)
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
505 '''
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
506
33928
6c119dbfd0c0 encoding: add fast path of from/toutf8b() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33927
diff changeset
507 if not isinstance(s, localstr) and isasciistr(s):
6c119dbfd0c0 encoding: add fast path of from/toutf8b() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33927
diff changeset
508 return s
26879
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
509 if "\xed" not in s:
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
510 if isinstance(s, localstr):
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
511 return s._utf8
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
512 try:
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
513 s.decode('utf-8', _utf8strict)
26879
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
514 return s
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
515 except UnicodeDecodeError:
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
516 pass
26878
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
517
34216
1c601df9894c py3: wrap bytes in encoding.from/toutf8b() with bytestr
Yuya Nishihara <yuya@tcha.org>
parents: 34200
diff changeset
518 s = pycompat.bytestr(s)
26878
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
519 r = ""
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
520 pos = 0
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
521 l = len(s)
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
522 while pos < l:
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
523 try:
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
524 c = getutf8char(s, pos)
26879
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
525 if "\xed\xb0\x80" <= c <= "\xed\xb3\xbf":
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
526 # have to re-escape existing U+DCxx characters
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
527 c = unichr(0xdc00 + ord(s[pos])).encode('utf-8', _utf8strict)
26879
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
528 pos += 1
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
529 else:
a24b98f4e03c encoding: re-escape U+DCxx characters in toutf8b input (issue4927)
Matt Mackall <mpm@selenic.com>
parents: 26878
diff changeset
530 pos += len(c)
26878
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
531 except UnicodeDecodeError:
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
532 c = unichr(0xdc00 + ord(s[pos])).encode('utf-8', _utf8strict)
26878
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
533 pos += 1
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
534 r += c
d7e83f106459 encoding: use getutf8char in toutf8b
Matt Mackall <mpm@selenic.com>
parents: 26877
diff changeset
535 return r
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
536
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
537 def fromutf8b(s):
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
538 '''Given a UTF-8b string, return a local, possibly-binary string.
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
539
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
540 return the original binary string. This
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
541 is a round-trip process for strings like filenames, but metadata
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
542 that's was passed through tolocal will remain in UTF-8.
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
543
26963
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
544 >>> roundtrip = lambda x: fromutf8b(toutf8b(x)) == x
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
545 >>> m = b"\\xc3\\xa9\\x99abcd"
26963
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
546 >>> toutf8b(m)
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
547 '\\xc3\\xa9\\xed\\xb2\\x99abcd'
26963
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
548 >>> roundtrip(m)
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
549 True
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
550 >>> roundtrip(b"\\xc2\\xc2\\x80")
26963
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
551 True
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
552 >>> roundtrip(b"\\xef\\xbf\\xbd")
26963
de5ae97ce9f4 encoding: extend test cases for utf8b
Matt Mackall <mpm@selenic.com>
parents: 26879
diff changeset
553 True
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
554 >>> roundtrip(b"\\xef\\xef\\xbf\\xbd")
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
555 True
34131
0fa781320203 doctest: bulk-replace string literals with b'' for Python 3
Yuya Nishihara <yuya@tcha.org>
parents: 33928
diff changeset
556 >>> roundtrip(b"\\xf1\\x80\\x80\\x80\\x80")
27699
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
557 True
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
558 '''
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
559
33928
6c119dbfd0c0 encoding: add fast path of from/toutf8b() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33927
diff changeset
560 if isasciistr(s):
6c119dbfd0c0 encoding: add fast path of from/toutf8b() for ASCII strings
Yuya Nishihara <yuya@tcha.org>
parents: 33927
diff changeset
561 return s
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
562 # fast path - look for uDxxx prefixes in s
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
563 if "\xed" not in s:
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
564 return s
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
565
27699
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
566 # We could do this with the unicode type but some Python builds
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
567 # use UTF-16 internally (issue5031) which causes non-BMP code
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
568 # points to be escaped. Instead, we use our handy getutf8char
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
569 # helper again to walk the string without "decoding" it.
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
570
34216
1c601df9894c py3: wrap bytes in encoding.from/toutf8b() with bytestr
Yuya Nishihara <yuya@tcha.org>
parents: 34200
diff changeset
571 s = pycompat.bytestr(s)
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
572 r = ""
27699
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
573 pos = 0
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
574 l = len(s)
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
575 while pos < l:
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
576 c = getutf8char(s, pos)
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
577 pos += len(c)
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
578 # unescape U+DCxx characters
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
579 if "\xed\xb0\x80" <= c <= "\xed\xb3\xbf":
34218
aa877860d4d7 py3: use 'surrogatepass' error handler to process U+DCxx transparently
Yuya Nishihara <yuya@tcha.org>
parents: 34216
diff changeset
580 c = pycompat.bytechr(ord(c.decode("utf-8", _utf8strict)) & 0xff)
27699
c8d3392f76e1 encoding: handle UTF-16 internal limit with fromutf8b (issue5031)
Matt Mackall <mpm@selenic.com>
parents: 27356
diff changeset
581 r += c
16133
84c58da3a1f8 encoding: introduce utf8-b helpers
Matt Mackall <mpm@selenic.com>
parents: 15769
diff changeset
582 return r
33839
7d5bc0e5b88f py3: introduce a wrapper for __builtins__.{raw_,}input()
Augie Fackler <augie@google.com>
parents: 33811
diff changeset
583
33852
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
584 if pycompat.ispy3:
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
585 class strio(io.TextIOWrapper):
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
586 """Wrapper around TextIOWrapper that respects hg's encoding assumptions.
33839
7d5bc0e5b88f py3: introduce a wrapper for __builtins__.{raw_,}input()
Augie Fackler <augie@google.com>
parents: 33811
diff changeset
587
33852
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
588 Also works around Python closing streams.
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
589 """
33839
7d5bc0e5b88f py3: introduce a wrapper for __builtins__.{raw_,}input()
Augie Fackler <augie@google.com>
parents: 33811
diff changeset
590
33852
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
591 def __init__(self, buffer):
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
592 super(strio, self).__init__(buffer, encoding=_sysstr(encoding))
33839
7d5bc0e5b88f py3: introduce a wrapper for __builtins__.{raw_,}input()
Augie Fackler <augie@google.com>
parents: 33811
diff changeset
593
33852
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
594 def __del__(self):
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
595 """Override __del__ so it doesn't close the underlying stream."""
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
596 else:
f18b11534274 py3: make encoding.strio() an identity function on Python 2
Yuya Nishihara <yuya@tcha.org>
parents: 33839
diff changeset
597 strio = pycompat.identity