如何从小端C++ -16编码字节中获取UTF std::string

#include <iostream>
#include <string>

std::string getUTF8StringFromLE16(const char* data, int length) {
    std::string utf8String;
    int i = 0;

    while (i < length) {
        // 提取低位字节
        unsigned char lowByte = data[i++];
        // 提取高位字节
        unsigned char highByte = data[i++];

        // 将高位字节和低位字节组合成UTF-16编码字符
        unsigned short utf16Char = (highByte << 8) | lowByte;

        // 转换为UTF-8编码格式
        if (utf16Char <= 0x7F) {
            utf8String += static_cast<char>(utf16Char);
        } else if (utf16Char <= 0x7FF) {
            utf8String += static_cast<char>(0xC0 | ((utf16Char >> 6) & 0x1F));
            utf8String += static_cast<char>(0x80 | (utf16Char & 0x3F));
        } else {
            utf8String += static_cast<char>(0xE0 | ((utf16Char >> 12) & 0x0F));
            utf8String += static_cast<char>(0x80 | ((utf16Char >> 6) & 0x3F));
            utf8String += static_cast<char>(0x80 | (utf16Char & 0x3F));
        }
    }

    return utf8String;
}

int main() {
    const char data[] = {0x68, 0x00, 0x65, 0x00, 0x6C, 0x00, 0x6C, 0x00, 0x6F, 0x00}; // "hello"的UTF-16编码
    int length = sizeof(data) / sizeof(data[0]);

    std::string utf8String = getUTF8StringFromLE16(data, length);
    std::cout << "UTF-8 String: " << utf8String << std::endl;

    return 0;
}