Lazarus 写一个 dll 以 json 的方式输出 smbios 信息

library smbios;

{$mode objfpc}{$H+}

uses
  Classes, SysUtils, fpjson, uSMBIOS;

function GetSMBIOS(dest: PAnsiChar):integer; stdcall;
var
  jObject: TJSONObject;
  jArray: TJSONArray;
  SMBios: TSMBios;
  LBIOS   : TBiosInformation;
  OEMStr  : TOEMStringsInformation;
  i : Integer;
begin
  jObject := TJSONObject.Create;
  SMBios:=TSMBios.Create;

  try
    LBIOS:=SMBios.BiosInfo;
    jObject.Add('Vendor', LBIOS.VendorStr);
    jObject.Add('Version', LBIOS.VersionStr);
    jObject.Add('Start Segment', IntToHex(LBIOS.RAWBiosInformation^.StartingSegment,4));
    jObject.Add('ReleaseDate', LBIOS.ReleaseDateStr);
    jObject.Add('Bios Rom Size', 64*(LBIOS.RAWBiosInformation^.BiosRomSize+1));

    if LBIOS.RAWBiosInformation^.SystemBIOSMajorRelease<>$ff then
       jObject.Add('System BIOS Major Release', LBIOS.RAWBiosInformation^.SystemBIOSMajorRelease);
    if LBIOS.RAWBiosInformation^.SystemBIOSMinorRelease<>$ff then
       jObject.Add('System BIOS Minor Release', LBIOS.RAWBiosInformation^.SystemBIOSMinorRelease);

    //If the system does not have field upgradeable embedded controller firmware, the value is 0FFh.
    if LBIOS.RAWBiosInformation^.EmbeddedControllerFirmwareMajorRelease<>$ff then
       jObject.Add('Embedded Controller Firmware Major Release', LBIOS.RAWBiosInformation^.EmbeddedControllerFirmwareMajorRelease);
    if LBIOS.RAWBiosInformation^.EmbeddedControllerFirmwareMinorRelease<>$ff then
       jObject.Add('Embedded Controller Firmware Minor Releasee', LBIOS.RAWBiosInformation^.EmbeddedControllerFirmwareMinorRelease);


    if SMBios.HasOEMStringsInfo then
    begin
      jArray := TJSONArray.Create;
      for OEMStr in SMBios.OEMStringsInfo do
        for i:=1 to OEMStr.RAWOEMStringsInformation^.Count do
          jArray.Add(OEMStr.GetOEMString(i));

      jObject.Add('OEM Strings', jArray);

    end;


    StrPLCopy(dest, jObject.AsJSON, 2048);
    // Writeln(jObject.AsJSON);
  finally
    jObject.Free;
    SMBios.Free;
  end;

  Result := 0;

end;

exports
  GetSMBIOS;
end.

#include <catch.hpp>
#include <Windows.h>
#include <iostream>


TEST_CASE("smbios test", "[smbios test]")
{
    typedef int (__stdcall *fn_GetSMBIOS)(char* dest);
    // function GetSMBIOS(dest: PAnsiChar):integer; stdcall; 

    HMODULE hLib = LoadLibrary(L"smbios.dll");
    fn_GetSMBIOS GetSMBIOS = (fn_GetSMBIOS)GetProcAddress(hLib, "GetSMBIOS");

    std::vector<char> buffer(2048);
    GetSMBIOS(&buffer[0]);
    printf(&buffer[0]); 

    FreeLibrary(hLib);
    

}