Author: Armin Rigo <[email protected]>
Branch:
Changeset: r98435:04a0915490aa
Date: 2020-01-01 17:17 +0100
http://bitbucket.org/pypy/pypy/changeset/04a0915490aa/
Log: Move the 'assert pos >= 0' before the 'code[pos]', to avoid extra
checking for negative pos when indexing
diff --git a/rpython/rlib/rutf8.py b/rpython/rlib/rutf8.py
--- a/rpython/rlib/rutf8.py
+++ b/rpython/rlib/rutf8.py
@@ -153,22 +153,20 @@
"""Gives the position of the previous codepoint.
'pos' must not be zero.
"""
- assert pos != 0
pos -= 1
+ assert pos >= 0
if pos >= len(code): # for the case where pos - 1 == len(code):
- assert pos >= 0
return pos # assume there is an extra '\x00' character
chr1 = ord(code[pos])
if chr1 <= 0x7F:
- assert pos >= 0
return pos
pos -= 1
+ assert pos >= 0
if ord(code[pos]) >= 0xC0:
- assert pos >= 0
return pos
pos -= 1
+ assert pos >= 0
if ord(code[pos]) >= 0xC0:
- assert pos >= 0
return pos
pos -= 1
assert pos >= 0
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