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comparison mercurial/pure/charencode.py @ 33926:f4433f2713d0

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encoding: add function to test if a str consists of ASCII characters Most strings are ASCII. Let's optimize for it. Using uint64_t is slightly faster than uint32_t on 64bit system, but there isn't huge difference.
author Yuya Nishihara <yuya@tcha.org>
date Sun, 23 Apr 2017 12:59:42 +0900
parents b9101467d88b
children 5307cc57f271
comparison
equal deleted inserted replaced
33925:2c37f9dabc32 33926:f4433f2713d0
10 import array 10 import array
11 11
12 from .. import ( 12 from .. import (
13 pycompat, 13 pycompat,
14 ) 14 )
15
16 def isasciistr(s):
17 try:
18 s.decode('ascii')
19 return True
20 except UnicodeDecodeError:
21 return False
15 22
16 def asciilower(s): 23 def asciilower(s):
17 '''convert a string to lowercase if ASCII 24 '''convert a string to lowercase if ASCII
18 25
19 Raises UnicodeDecodeError if non-ASCII characters are found.''' 26 Raises UnicodeDecodeError if non-ASCII characters are found.'''