Mercurial > hg
annotate mercurial/py3kcompat.py @ 20835:0e8417131a29
util: add the code path to "cachefunc()" for the function taking no arguments
Before this patch, "util.cachefunc()" caches the value returned by the
specified function into dictionary "cache", even if the specified
function takes no arguments.
In such case, "cache" has at most one entry, and distinction between
entries in "cache" is meaningless.
This patch adds the code path to "cachefunc()" for the function taking
no arguments for efficiency: to store only one cached value, using
list "cache" is a little faster than using dictionary "cache".
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sat, 15 Feb 2014 19:52:26 +0900 |
parents | e7cfe3587ea4 |
children | 007d276f8c94 |
rev | line source |
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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 import os, builtins |
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9 |
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10 from numbers import Number |
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11 |
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12 def bytesformatter(format, args): |
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13 '''Custom implementation of a formatter for bytestrings. |
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14 |
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15 This function currently relies on the string formatter to do the |
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16 formatting and always returns bytes objects. |
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17 |
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18 >>> bytesformatter(20, 10) |
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19 0 |
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20 >>> bytesformatter('unicode %s, %s!', ('string', 'foo')) |
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21 b'unicode string, foo!' |
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22 >>> bytesformatter(b'test %s', 'me') |
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23 b'test me' |
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24 >>> bytesformatter('test %s', 'me') |
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25 b'test me' |
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26 >>> bytesformatter(b'test %s', b'me') |
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27 b'test me' |
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28 >>> bytesformatter('test %s', b'me') |
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29 b'test me' |
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30 >>> bytesformatter('test %d: %s', (1, b'result')) |
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31 b'test 1: result' |
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32 ''' |
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33 # The current implementation just converts from bytes to unicode, do |
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34 # what's needed and then convert the results back to bytes. |
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35 # Another alternative is to use the Python C API implementation. |
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36 if isinstance(format, Number): |
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37 # If the fixer erroneously passes a number remainder operation to |
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38 # bytesformatter, we just return the correct operation |
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39 return format % args |
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40 if isinstance(format, bytes): |
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41 format = format.decode('utf-8', 'surrogateescape') |
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42 if isinstance(args, bytes): |
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43 args = args.decode('utf-8', 'surrogateescape') |
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44 if isinstance(args, tuple): |
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45 newargs = [] |
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46 for arg in args: |
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47 if isinstance(arg, bytes): |
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48 arg = arg.decode('utf-8', 'surrogateescape') |
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49 newargs.append(arg) |
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50 args = tuple(newargs) |
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51 ret = format % args |
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52 return ret.encode('utf-8', 'surrogateescape') |
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53 builtins.bytesformatter = bytesformatter |
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54 |
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55 # Create bytes equivalents for os.environ values |
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56 for key in list(os.environ.keys()): |
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57 # UTF-8 is fine for us |
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58 bkey = key.encode('utf-8', 'surrogateescape') |
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59 bvalue = os.environ[key].encode('utf-8', 'surrogateescape') |
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60 os.environ[bkey] = bvalue |
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61 |
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62 origord = builtins.ord |
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63 def fakeord(char): |
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64 if isinstance(char, int): |
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65 return char |
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66 return origord(char) |
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67 builtins.ord = fakeord |
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68 |
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69 if __name__ == '__main__': |
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70 import doctest |
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71 doctest.testmod() |
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72 |