pidlfunc.cpp

3D reconstruction, medical image processing from colons, using intel image processing for based clas

#include "stdafx.h"
#include "pidlfunc.h"

LPMALLOC g_pMalloc = NULL;

void Pidl_Initialize()
{
	SHGetMalloc(&g_pMalloc);
}

void Pidl_CleanUp()
{
	if (g_pMalloc) {
		g_pMalloc->Release();
		g_pMalloc = NULL;
	}
}

LPITEMIDLIST Pidl_Create(UINT cbSize)
{
	LPITEMIDLIST pidl = NULL;

	pidl = (LPITEMIDLIST) g_pMalloc->Alloc(cbSize);
	if (pidl)
		ZeroMemory(pidl, cbSize);

	return pidl;
}

UINT Pidl_GetSize(LPCITEMIDLIST pidl)
{
	UINT cbTotal = 0;
	LPITEMIDLIST pidlTemp = (LPITEMIDLIST) pidl;

	if (pidlTemp) {
		while (pidlTemp->mkid.cb) {
			cbTotal += pidlTemp->mkid.cb;
			pidlTemp = Pidl_GetNextItem(pidlTemp);
		}  

		// Requires a 16 bit zero value for the NULL terminator
		cbTotal += 2 * sizeof(BYTE);
	}

	return cbTotal;
}

LPITEMIDLIST Pidl_Copy(LPCITEMIDLIST pidlSource)
{
	LPITEMIDLIST pidlTarget = NULL;
	UINT cbSource = 0;

	if (NULL == pidlSource)
		return NULL;

	//
	// Allocate the new ITEMIDLIST
	//
	cbSource = Pidl_GetSize(pidlSource);
	pidlTarget = (LPITEMIDLIST) g_pMalloc->Alloc(cbSource);
	if (!pidlTarget)
		return NULL;

	//
	// Copy the source to the target
	//
	CopyMemory(pidlTarget, pidlSource, cbSource);

	return pidlTarget;
}

LPITEMIDLIST Pidl_Concatenate(LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
{
	LPITEMIDLIST pidlNew;
	UINT cb1 = 0, cb2 = 0;

	//
	// Pidl1 can possibly be NULL if it points to the desktop.  Since we only
	// need a single NULL terminator, we remove the extra 2 bytes from the
	// size of the first ITEMIDLIST.
	//
	if (pidl1)
		cb1 = Pidl_GetSize(pidl1) - (2 * sizeof(BYTE));

	cb2 = Pidl_GetSize(pidl2);

	//
	// Create a new ITEMIDLIST that is the size of both pidl1 and pidl2, then
	// copy pidl1 and pidl2 to the new list.
	//
	pidlNew = Pidl_Create(cb1 + cb2);
	if (pidlNew) {
		if(pidl1)   
			CopyMemory(pidlNew, pidl1, cb1);

		CopyMemory(((LPBYTE)pidlNew) + cb1, pidl2, cb2);
	}

	return pidlNew;
}

// iMode: 0 = REL, 1 = FQ
int Pidl_Compare(LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2, int iMode)
{
	UINT uSize1, uSize2;

	if (pidl1 && pidl2) {
		switch (iMode) {
		case 0:			// REL
			uSize1 = pidl1->mkid.cb;
			uSize2 = pidl2->mkid.cb;
			break;

		case 1:			// FQ
			uSize1 = Pidl_GetSize(pidl1);
			uSize2 = Pidl_GetSize(pidl2);
			break;
		}

		if ((uSize1 == uSize2) && !memcmp(pidl1, pidl2, uSize1))
			return 0;
		else
			return 1;
	}

	return 1;		// 0 if equivalent, 1 otherwise
}

void Pidl_Free(LPITEMIDLIST pidl)
{
	if (pidl)
		g_pMalloc->Free(pidl);
}