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Add allocation-free fast path to is_common_tld.

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This commit is contained in:
levlam 2022-08-20 12:56:52 +03:00
parent fc9e878539
commit 0649b7e2fa
1 changed files with 11 additions and 0 deletions
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11
td/telegram/MessageEntity.cpp
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@ -1143,6 +1143,17 @@ static bool is_common_tld(Slice str) {
"zippo", "zm", "zone", "zuerich", "zippo", "zm", "zone", "zuerich",
// comment for clang-format to prevent it from placing all strings on separate lines // comment for clang-format to prevent it from placing all strings on separate lines
"zw"}); "zw"});
bool is_lower = true;
for (auto c : str) {
if (static_cast<uint32>(c - 'a') > 'z' - 'a') {
is_lower = false;
break;
}
}
if (is_lower) {
// fast path
return tlds.count(str) > 0;
}
string str_lower = utf8_to_lower(str); string str_lower = utf8_to_lower(str);
if (str_lower != str && utf8_substr(Slice(str_lower), 1) == utf8_substr(str, 1)) { if (str_lower != str && utf8_substr(Slice(str_lower), 1) == utf8_substr(str, 1)) {
return false; return false;