更清洁的方法从CStringW转换为std :: string？

#include <iconv.h>
#include <string>

std::string ConvertCStringWToString(const CStringW& cstr)
{
    std::wstring wstr(cstr);
    std::string result;

    iconv_t conv = iconv_open("UTF-8", "UTF-16LE");
    if (conv == (iconv_t)-1) {
        // 转换失败处理
        return result;
    }

    size_t inBytes = wstr.size() * sizeof(wchar_t);
    size_t outBytes = inBytes * 2; // 预留足够的空间

    char* inBuf = reinterpret_cast<char*>(const_cast<wchar_t*>(wstr.c_str()));
    char* outBuf = new char[outBytes];
    char* outBufPtr = outBuf;

    if (iconv(conv, &inBuf, &inBytes, &outBufPtr, &outBytes) == (size_t)-1) {
        // 转换失败处理
        delete[] outBuf;
        iconv_close(conv);
        return result;
    }

    result.assign(outBuf, outBufPtr - outBuf);

    delete[] outBuf;
    iconv_close(conv);

    return result;
}