Form Designer

// StringHelpers.h
//
// Author : David Shepherd
//			Copyright (c) 2002, DaeDoe-Software
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_STRINGHELPERS_H__4468EFA1_2854_11D6_B6A6_856C06A39D46__INCLUDED_)
#define AFX_STRINGHELPERS_H__4468EFA1_2854_11D6_B6A6_856C06A39D46__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

// helper for client -> server
template <class T> // takes most standard containers
auto_array_ptr<LPCOLESTR> ComClientStringArrayToServer(const T &Container)
{
	// create a string array suitable for passing over com
	auto_array_ptr<LPCOLESTR> pArray(new LPCOLESTR [Container.size()]);
	// initialise each element
	DWORD Index=0;
	T::const_iterator iter=Container.begin();
	while(iter!=Container.end())
	{
		pArray.get()[Index++]=iter->c_str();
		iter++;
	}
	return pArray;
}

// helper for client <- server
template <class T> // takes most standard containers
void ComClientStringArrayFromServer(DWORD Count,LPCOLESTR *pArray,T &Container)
{
	// check parameters
	if(pArray==NULL)
	{
		throw std::exception();
	}
	// place each string into the container and free the remote storage
	for(long l=0; l<(long)Count; l++)
	{
		LPCOLESTR pString=pArray[l];
		if(pString==NULL)
		{
			throw std::exception();
		}
		Container.push_back(pString);
		CoTaskMemFree((LPVOID)pString);
	}
	// free the array remote storage
	CoTaskMemFree((LPVOID)pArray);
}

// helper for server -> client
template <class T> // takes most standard containers
LPCOLESTR *ComServerStringArrayToClient(const T &Container)
{
	// create a string array suitable for passing over com
	LPCOLESTR *pArray=
		(LPCOLESTR *)CoTaskMemAlloc(Container.size()*sizeof(LPCOLESTR));
	if(pArray==NULL)
	{
		throw std::exception();
	}
	// initialise each element
	DWORD Index=0;
	T::const_iterator iter=Container.begin();
	while(iter!=Container.end())
	{
		LPOLESTR pString=
			(LPOLESTR)CoTaskMemAlloc((iter->length()+1)*sizeof(OLECHAR));
		if(pString==NULL)
		{
			throw std::exception();
		}
		wcscpy(pString,iter->c_str());
		pArray[Index++]=pString;
		iter++;
	}
	return pArray;
}

// helper for server <- client
template <class T> // takes most standard containers
void ComServerStringArrayFromClient(DWORD Count,LPCOLESTR *pArray,T &Container)
{
	// check parameters
	if(pArray==NULL)
	{
		throw std::exception();
	}
	// place each string into the container
	for(long l=0; l<(long)Count; l++)
	{
		LPCOLESTR pString=pArray[l];
		if(pString==NULL)
		{
			throw std::exception();
		}
		Container.push_back(pString);
	}
}

#endif // !defined(AFX_STRINGHELPERS_H__4468EFA1_2854_11D6_B6A6_856C06A39D46__INCLUDED_)