Method trim

source/util/bstring.cpp:643–674

}

BString BString::trim() {
    if (isEmpty()) {
        return *this;
    }
    int startIndex = 0;
    int len = length();
    int endIndex = len;
    for (int i = 0; i < len; i++) {
        if (std::isspace(data->str[i])) {
            startIndex++;
        } else {
            break;
        }
    }
    for (int i = len - 1; i > startIndex; i--) {
        if (std::isspace(data->str[i])) {
            endIndex--;
        } else {
            break;
        }
    }
    if (startIndex == 0 && endIndex == len) {
        return *this;
    }
    makeWritable(0);
    data->len = endIndex - startIndex;
    if (startIndex) {
        memmove(data->str, data->str + startIndex, data->len);
    }
    data->str[data->len] = 0;
    return *this;
}

BString BString::operator+(const BString& s) const {
    if (isEmpty()) {