std::string utf16ToUtf8(const StringPiece16& utf16) {
ssize_t utf8Length = utf16_to_utf8_length(utf16.data(), utf16.length());
if (utf8Length <= 0) {
return {};
}
std::string utf8;
utf8.resize(utf8Length);
utf16_to_utf8(utf16.data(), utf16.length(), &*utf8.begin());
return utf8;
}
StringPiece16 trimWhitespace(const StringPiece16& str) {
if (str.size() == 0 || str.data() == nullptr) {
return str;
}
const char16_t* start = str.data();
const char16_t* end = str.data() + str.length();
while (start != end && util::isspace16(*start)) {
start++;
}
while (end != start && util::isspace16(*(end - 1))) {
end--;
}
return StringPiece16(start, end - start);
}