fortune3b.cpp

VC++串口通信设。本书详细说明讲解了在VC++环境下编写串口通信得过程。值得一看

// Get needed include files
#define INITGUID
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/timeb.h>
#include "Fortune3.h"
#include "Utility.h"


// Support dynamic creation
IMPLEMENT_DYNCREATE(ComFortuneTeller, CCmdTarget)

// Support a class factory
IMPLEMENT_OLECREATE(ComFortuneTeller, "FortuneTeller3",
0x28200682, 0x35b6, 0x11d0, 0x8b, 0xbd, 0xfa, 0x6e, 0xaa, 0x2d, 0x62, 0xd);

// Map the various interfaces onto the nested interface classes
BEGIN_INTERFACE_MAP(ComFortuneTeller, CCmdTarget)
   INTERFACE_PART(ComFortuneTeller, IID_IFortuneTeller, CInnerFortune)
   INTERFACE_PART(ComFortuneTeller, IID_IQuotation,     CInnerQuote)
END_INTERFACE_MAP()


// Our list of fortunes
static CString g_astrFortunes[] = 
   { 
      "You are strong in body and spirit.",
      "You are strong in perspiration and odor.",
      "Good fortune smiles upon the distributed.",
      "VB Programmer for Hire -- Cheap!!",
      "I never met an object I didn't like.",
      "Edit, Compile, Link, Crash, Sigh.",
      "Never judge a stack dump by its arguments.",
      "Card carrying member of the Bug Police.",
      "You make Dilbert look charming and sophisticated.",
      "BMW, The Ultimate Driving Machine."
   };

// Constant that tracks the number of fortunes we know about
static const ULONG g_ulNumFortunes = 
   sizeof(g_astrFortunes) / sizeof(CString);


// Our list of quotations
struct CQuoteTuple
{
   // Ctor
   CQuoteTuple(CString strNewQuote, CString strNewAuthor)
                          : m_strQuotation(strNewQuote),
                            m_strAuthor(strNewAuthor)
   { }

   // Member data
   CString   m_strQuotation;
   CString   m_strAuthor;
};

static CQuoteTuple g_aQuotations[] = 
   { 
      { CQuoteTuple("Most writers steal a good thing when they can,\n"
                    " And when 'tis safely got 'tis worth the winning.\n"
                    " The worst of 't is we now and then detect 'em,\n"
                    " Before they ever dream that we suspect 'em.",
                    "Bryan Waller Proctor") },
      { CQuoteTuple("Husbands never become good;\n"
                    " they merely become proficient.",
                    "H. L. Mencken") },
      { CQuoteTuple("Americans may have no identity,\n"
                    " but they do have wonderful teeth.",
                    "Jean Baudrillard") },
      { CQuoteTuple("Justice ... limps along,\n"
                    " but it gets there all the same.",
                    "Gabriel Garc韆 M醨quez") },
      { CQuoteTuple("In politics if you want anything said, ask a man.\n"
                    " If you want anything done, ask a woman.",
                    "Margaret Thatcher") },
      { CQuoteTuple("This sucks!", 
                    "Chris Corry") }
   };

// Constant that tracks the number of fortunes we know about
static const ULONG g_ulNumQuotations = 
   sizeof(g_aQuotations) / sizeof(CQuoteTuple);


//
// Constructor and destructor
//

ComFortuneTeller::ComFortuneTeller()
{
   VerboseMsg("In FortuneTeller constructor.\n");

   // Seed the random number generator
   struct _timeb timebuffer;
   _ftime(&timebuffer);
   srand(timebuffer.millitm);

   AfxOleLockApp();
}

ComFortuneTeller::~ComFortuneTeller()
{
   VerboseMsg("In ComFortuneTeller destructor.\n");
   AfxOleUnlockApp();
}



//
// Nested FortuneTeller class
//

IMPLEMENT_NESTED_IUNKNOWN(ComFortuneTeller, CInnerFortune)

STDMETHODIMP 
ComFortuneTeller::XCInnerFortune::GetFortune(PBSTR pbstrFortune)
{
   METHOD_PROLOGUE(ComFortuneTeller, CInnerFortune)
   VerboseMsg("In GetFortune.\n");

   // Initialize the output string
   *pbstrFortune = NULL;

   // Create a BSTR out of the fortune
   *pbstrFortune = g_astrFortunes[rand() % g_ulNumFortunes].AllocSysString();

   return NOERROR;
}


//
// Nested Quotation class
//

IMPLEMENT_NESTED_IUNKNOWN(ComFortuneTeller, CInnerQuote)

STDMETHODIMP 
ComFortuneTeller::XCInnerQuote::GetQuotation(PBSTR pbstrQuotation,
                                             PBSTR pbstrAuthor)
{
   METHOD_PROLOGUE(ComFortuneTeller, CInnerQuote)
   VerboseMsg("In GetQuotation.\n");

   // Initialize the output strings
   *pbstrQuotation = NULL;
   *pbstrAuthor = NULL;

   // Select our quote
   CQuoteTuple *pQuote = &g_aQuotations[rand() % g_ulNumQuotations];

   // Create BSTRs out of the quotation and author strings
   *pbstrQuotation = pQuote->m_strQuotation.AllocSysString();
   *pbstrAuthor = pQuote->m_strAuthor.AllocSysString();

   return NOERROR;
}