Author: Armin Rigo <ar...@tunes.org>
Branch: unicode-utf8
Changeset: r93281:91e03fd0b17e
Date: 2017-12-06 11:13 +0100
http://bitbucket.org/pypy/pypy/changeset/91e03fd0b17e/
Log: This is probably faster (needs non-ascii to verify)
diff --git a/rpython/rlib/rutf8.py b/rpython/rlib/rutf8.py
--- a/rpython/rlib/rutf8.py
+++ b/rpython/rlib/rutf8.py
@@ -131,23 +131,20 @@
ordch2 = ord(code[pos+1])
if ordch1 <= 0xDF:
# 110yyyyy 10zzzzzz -> 00000000 00000yyy yyzzzzzz
- return (((ordch1 & 0x1F) << 6) + # 0b00011111
- (ordch2 & 0x3F)) # 0b00111111
+ return (ordch1 << 6) + ordch2 - (
+ (0xC0 << 6) + 0x80 )
ordch3 = ord(code[pos+2])
if ordch1 <= 0xEF:
# 1110xxxx 10yyyyyy 10zzzzzz -> 00000000 xxxxyyyy yyzzzzzz
- return (((ordch1 & 0x0F) << 12) + # 0b00001111
- ((ordch2 & 0x3F) << 6) + # 0b00111111
- (ordch3 & 0x3F)) # 0b00111111
+ return (ordch1 << 12) + (ordch2 << 6) + ordch3 - (
+ (0xE0 << 12) + (0x80 << 6) + 0x80 )
ordch4 = ord(code[pos+3])
if True:
# 11110www 10xxxxxx 10yyyyyy 10zzzzzz -> 000wwwxx xxxxyyyy yyzzzzzz
- return (((ordch1 & 0x07) << 18) + # 0b00000111
- ((ordch2 & 0x3F) << 12) + # 0b00111111
- ((ordch3 & 0x3F) << 6) + # 0b00111111
- (ordch4 & 0x3F)) # 0b00111111
+ return (ordch1 << 18) + (ordch2 << 12) + (ordch3 << 6) + ordch4 - (
+ (0xF0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80 )
assert False, "unreachable"
def codepoint_before_pos(code, pos):
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