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# py3kcompat.py - compatibility definitions for running hg in py3k
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#
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# Copyright 2010 Renato Cunha <renatoc@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import builtins
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from numbers import Number
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def bytesformatter(format, args):
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'''Custom implementation of a formatter for bytestrings.
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This function currently relies on the string formatter to do the
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formatting and always returns bytes objects.
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>>> bytesformatter(20, 10)
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0
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>>> bytesformatter('unicode %s, %s!', ('string', 'foo'))
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b'unicode string, foo!'
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>>> bytesformatter(b'test %s', 'me')
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b'test me'
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>>> bytesformatter('test %s', 'me')
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b'test me'
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>>> bytesformatter(b'test %s', b'me')
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b'test me'
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>>> bytesformatter('test %s', b'me')
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b'test me'
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>>> bytesformatter('test %d: %s', (1, b'result'))
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b'test 1: result'
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'''
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# The current implementation just converts from bytes to unicode, do
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# what's needed and then convert the results back to bytes.
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# Another alternative is to use the Python C API implementation.
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if isinstance(format, Number):
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# If the fixer erroneously passes a number remainder operation to
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# bytesformatter, we just return the correct operation
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return format % args
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if isinstance(format, bytes):
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format = format.decode('utf-8', 'surrogateescape')
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if isinstance(args, bytes):
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args = args.decode('utf-8', 'surrogateescape')
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if isinstance(args, tuple):
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newargs = []
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for arg in args:
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if isinstance(arg, bytes):
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arg = arg.decode('utf-8', 'surrogateescape')
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newargs.append(arg)
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args = tuple(newargs)
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ret = format % args
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return ret.encode('utf-8', 'surrogateescape')
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builtins.bytesformatter = bytesformatter
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origord = builtins.ord
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def fakeord(char):
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if isinstance(char, int):
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return char
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return origord(char)
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builtins.ord = fakeord
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if __name__ == '__main__':
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import doctest
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doctest.testmod()
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