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Merge pull request #100016 from Ivorforce/camelcase-to-underscore-rolling-cache 

Optimize `_camelcase_to_underscore` (and thus `String.capitalize`)
This commit is contained in:
Thaddeus Crews 2024-12-05 14:11:59 -06:00
parent 3a948abdce 8d82933c7c
commit 06cce0e81a
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GPG Key ID: 62181B86FE9E5D84
1 changed files with 16 additions and 8 deletions
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24
core/string/ustring.cpp
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@ -1109,17 +1109,21 @@ String String::_camelcase_to_underscore() const {
String new_string;
int start_index = 0;
for (int i = 1; i < size(); i++) {
bool is_prev_upper = is_unicode_upper_case(cstr[i - 1]);
bool is_prev_lower = is_unicode_lower_case(cstr[i - 1]);
bool is_prev_digit = is_digit(cstr[i - 1]);
if (length() == 0) {
return *this;
}
bool is_curr_upper = is_unicode_upper_case(cstr[i]);
bool is_curr_lower = is_unicode_lower_case(cstr[i]);
bool is_curr_digit = is_digit(cstr[i]);
bool is_prev_upper = is_unicode_upper_case(cstr[0]);
bool is_prev_lower = is_unicode_lower_case(cstr[0]);
bool is_prev_digit = is_digit(cstr[0]);
for (int i = 1; i < length(); i++) {
const bool is_curr_upper = is_unicode_upper_case(cstr[i]);
const bool is_curr_lower = is_unicode_lower_case(cstr[i]);
const bool is_curr_digit = is_digit(cstr[i]);
bool is_next_lower = false;
if (i + 1 < size()) {
if (i + 1 < length()) {
is_next_lower = is_unicode_lower_case(cstr[i + 1]);
}
@ -1132,6 +1136,10 @@ String String::_camelcase_to_underscore() const {
new_string += substr(start_index, i - start_index) + "_";
start_index = i;
}
is_prev_upper = is_curr_upper;
is_prev_lower = is_curr_lower;
is_prev_digit = is_curr_digit;
}
new_string += substr(start_index, size() - start_index);