C / C++ / MFC

class HiFolks
{
  ostream * _pos;
public:
  HiFolks(ostream * pos):_pos(pos){};
  void setos(ostream * pos){ _pos = pos;}
  void sayHi()
  {
    (*_pos) << "hi folks" << endl;
  }
};



void main()
{
  strstream s;
	
  HiFolks hf(&cout);
  hf.sayHi(); // output goes to console
  hf.setos(&s);
  hf.sayHi(); // output goes to string 
}

George_George wrote:

1. You agree with my points in original post?

George_George wrote:

2. In MSDN, there is no inheritance hierarchy information (at least I can not find from API document for ostrstream, could you find such information from MSDN)? for example ostrstream inherits from ostream.

George_George wrote:

Any other situations which use of this class (compared with other string and stream related class) will give us special benefits?

poda123 wrote:

But I need to make this without using any utility tools,
just mere by coding.

poda123 wrote:

Could you please help me out to run your application,where
I can learn more things out there.

poda123 wrote:

I tried to execute the process viewer,
but could not run due to the error message
"...desktop\procviewer\utils.h(829) : error C2065: 'SLR_NOSEARCH' : undeclared identifier"

// Exports.cpp : Defines the entry point for the console application.
//
 
#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include <Imagehlp.h>
#pragma comment(lib, "Imagehlp.lib")
using namespace std;
 
int main(int argc, char* argv[])
{
	if (argc!=2)
	{
		cerr << "Usage:\n\tExports <path to dll>" << endl;
		return 1;
	}
 
	// Try to map the DLL into memory.
	LOADED_IMAGE li;
	BOOL bOK = MapAndLoad(
			argv[1],	// PSTR ImageName
			NULL,		// PSTR DllPath
			&li,		// PLOADED_IMAGE LoadedImage
			TRUE,		// BOOL DotDll
			TRUE		// BOOL ReadOnly
			);
	if (!bOK)
	{
		cerr << "MapAndLoad failed!" << endl;
		return 2;
	}
 
	// Now get the address of the export table.
	DWORD expVA = li.FileHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
	PIMAGE_EXPORT_DIRECTORY pExp = (PIMAGE_EXPORT_DIRECTORY)ImageRvaToVa(
								li.FileHeader,		// IN PIMAGE_NT_HEADERS NtHeaders
								li.MappedAddress,	// IN PVOID Base
								expVA,			// IN ULONG Rva
								NULL			// IN OUT PIMAGE_SECTION_HEADER *LastRvaSection
								);
 
 
	// Now dump the functions names.
	DWORD rvaNames = pExp->AddressOfNames;
	DWORD *prvaNames = (DWORD*)ImageRvaToVa(
					li.FileHeader,		// IN PIMAGE_NT_HEADERS NtHeaders
					li.MappedAddress,	// IN PVOID Base
					rvaNames,		// IN ULONG Rva
					NULL			// IN OUT PIMAGE_SECTION_HEADER *LastRvaSection
					);
	for (DWORD i=0; i<pExp->NumberOfNames; ++i)
	{
		DWORD rvaName = prvaNames[i];
		const char *pName = (const char*)ImageRvaToVa(
						li.FileHeader,		// IN PIMAGE_NT_HEADERS NtHeaders
						li.MappedAddress,	// IN PVOID Base
						rvaName,		// IN ULONG Rva
						NULL			// IN OUT PIMAGE_SECTION_HEADER *LastRvaSection
						);
 
		cout << pName << endl;
	}
 
	// Unmap it.
	UnMapAndLoad(&li);
 
	return 0;
}