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downcase_single/upcase_single: assume ASCII

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These functions assume ASCII compatibility.  That has to be ensured in
their caller.
This commit is contained in:
卜部昌平 2021-09-30 15:32:34 +09:00
parent 5c167a9778
commit 499660b04f
Notes: git 2021-10-05 14:18:46 +09:00 
Merged: https://github.com/ruby/ruby/pull/4909
1 changed files with 2 additions and 4 deletions
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6
string.c
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@ -6897,9 +6897,8 @@ upcase_single(VALUE str)
while (s < send) {
unsigned int c = *(unsigned char*)s;
const rb_encoding *const enc = 0;
if (rb_enc_isascii(c, enc) && 'a' <= c && c <= 'z') {
if ('a' <= c && c <= 'z') {
*s = 'A' + (c - 'a');
modified = true;
}
@ -6988,9 +6987,8 @@ downcase_single(VALUE str)
while (s < send) {
unsigned int c = *(unsigned char*)s;
const rb_encoding *const enc = 0;
if (rb_enc_isascii(c, enc) && 'A' <= c && c <= 'Z') {
if ('A' <= c && c <= 'Z') {
*s = 'a' + (c - 'A');
modified = true;
}