枚举windows串口(1)

参考文档
http://www.cppblog.com/franksunny/archive/2006/10/10/13551.aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/dd162687(v=vs.85).aspx

#include <windows.h>

#include <string>
#include <iostream>
#include <vector>

int main() {
    std::vector<std::wstring> strSerialList;
    DWORD cbNeeded = 0;  // bytes received or required
    DWORD cReturned = 0;  // number of ports received
    // 获取端口信息，能获得端口信息的大小 pcbNeeded
    EnumPorts(NULL, 2, 0, 0, &cbNeeded, &cReturned);
    // 枚举端口，能获得端口的具体信息 pBite 以及端口的的个数 pcReturned
    PORT_INFO_2 *pPort = (PORT_INFO_2*)malloc(cbNeeded);
    EnumPorts(NULL, 2, (LPBYTE)pPort, cbNeeded, &cbNeeded, &cReturned);
    for (int i = 0; i < cReturned; i++) {
        std::wstring str = pPort[i].pPortName;
        if (str.substr(0, 3) == L"COM") {
            strSerialList.push_back(str);
            std::wcout << str << std::endl;
        }
    }
    free(pPort);
}