annotate mercurial/py3kcompat.py @ 27489:51aff98d2861

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author timeless <timeless@mozdev.org>
date Tue, 22 Dec 2015 06:02:01 +0000
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1 # py3kcompat.py - compatibility definitions for running hg in py3k
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2 #
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3 # Copyright 2010 Renato Cunha <renatoc@gmail.com>
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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
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10 import builtins
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11 import numbers
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12
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13 Number = numbers.Number
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14
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15 def bytesformatter(format, args):
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16 '''Custom implementation of a formatter for bytestrings.
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17
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18 This function currently relies on the string formatter to do the
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19 formatting and always returns bytes objects.
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20
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21 >>> bytesformatter(20, 10)
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22 0
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23 >>> bytesformatter('unicode %s, %s!', ('string', 'foo'))
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24 b'unicode string, foo!'
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25 >>> bytesformatter(b'test %s', 'me')
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26 b'test me'
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27 >>> bytesformatter('test %s', 'me')
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28 b'test me'
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29 >>> bytesformatter(b'test %s', b'me')
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30 b'test me'
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31 >>> bytesformatter('test %s', b'me')
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32 b'test me'
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33 >>> bytesformatter('test %d: %s', (1, b'result'))
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34 b'test 1: result'
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35 '''
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36 # The current implementation just converts from bytes to unicode, do
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37 # what's needed and then convert the results back to bytes.
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38 # Another alternative is to use the Python C API implementation.
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39 if isinstance(format, Number):
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40 # If the fixer erroneously passes a number remainder operation to
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41 # bytesformatter, we just return the correct operation
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42 return format % args
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43 if isinstance(format, bytes):
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44 format = format.decode('utf-8', 'surrogateescape')
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45 if isinstance(args, bytes):
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46 args = args.decode('utf-8', 'surrogateescape')
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47 if isinstance(args, tuple):
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48 newargs = []
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49 for arg in args:
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50 if isinstance(arg, bytes):
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51 arg = arg.decode('utf-8', 'surrogateescape')
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52 newargs.append(arg)
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53 args = tuple(newargs)
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54 ret = format % args
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55 return ret.encode('utf-8', 'surrogateescape')
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56 builtins.bytesformatter = bytesformatter
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57
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58 origord = builtins.ord
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59 def fakeord(char):
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60 if isinstance(char, int):
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61 return char
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62 return origord(char)
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63 builtins.ord = fakeord
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64
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65 if __name__ == '__main__':
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66 import doctest
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67 doctest.testmod()
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68