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#include "stdafx.h"
#include "shlcom.h"
TGroupNode* FindGroupNode(TGroupNode *p, const DWORD Hash, int Depth)
{
while (p != NULL) {
if (p->Hash == Hash && p->Depth == Depth)
return p;
if (p->Left != NULL) {
TGroupNode *q = FindGroupNode(p->Left, Hash, Depth);
if (q != NULL)
return q;
}
p = p->Right;
}
return p;
}
TGroupNode* AllocGroupNode(TGroupNodeList *list, TGroupNode *Root, int Depth)
{
TGroupNode *p = (TGroupNode*)calloc(1, sizeof(TGroupNode));
p->Depth = Depth;
if (Depth > 0) {
if (Root->Left == NULL)
Root->Left = p;
else {
Root = Root->Left;
while (Root->Right != NULL)
Root = Root->Right;
Root->Right = p;
}
}
else {
if (list->First == NULL)
list->First = p;
if (list->Last != NULL)
list->Last->Right = p;
list->Last = p;
}
return p;
}
void ipcPrepareRequests(int ipcPacketSize, THeaderIPC *pipch, DWORD fRequests)
{
// some fields may already have values like the event object name to open
pipch->cbSize = sizeof(THeaderIPC);
pipch->dwVersion = PLUGIN_MAKE_VERSION(2, 0, 1, 2);
pipch->dwFlags = 0;
pipch->pServerBaseAddress = NULL;
pipch->pClientBaseAddress = pipch;
pipch->fRequests = fRequests;
pipch->Slots = 0;
pipch->IconsBegin = NULL;
pipch->ContactsBegin = NULL;
pipch->GroupsBegin = NULL;
pipch->NewIconsBegin = NULL;
pipch->DataSize = ipcPacketSize - pipch->cbSize;
// the server side will adjust these pointers as soon as it opens
// the mapped file to it's base address, these are set 'ere because ipcAlloc()
// maybe used on the client side and are translated by the server side.
// ipcAlloc() is used on the client side when transferring filenames
// to the ST thread.
pipch->DataPtr = (TSlotIPC*)(LPSTR(pipch) + sizeof(THeaderIPC));
pipch->DataPtrEnd = (TSlotIPC*)(LPSTR(pipch->DataPtr) + pipch->DataSize);
pipch->DataFramePtr = pipch->DataPtr;
// fill the data area
memset(pipch->DataPtr, pipch->DataSize, 0);
}
DWORD ipcSendRequest(HANDLE hSignal, HANDLE hWaitFor, THeaderIPC *pipch, DWORD dwTimeoutMsecs)
{
// signal ST to work
SetEvent(hSignal);
// wait for reply, it should open a handle to hWaitFor...
while (true) {
switch ( WaitForSingleObjectEx(hWaitFor, dwTimeoutMsecs, true)) {
case WAIT_OBJECT_0:
return pipch->fRequests;
case WAIT_IO_COMPLETION:
// APC call...
break;
default:
return REPLY_FAIL;
}
}
}
TSlotIPC* ipcAlloc(THeaderIPC *pipch, int nSize)
{
// nSize maybe zero, in that case there is no string section ---
UINT_PTR PSP = UINT_PTR(pipch->DataFramePtr) + sizeof(TSlotIPC) + nSize;
// is it past the end?
if (PSP >= UINT_PTR(pipch->DataPtrEnd))
return NULL;
// return the pointer
TSlotIPC *p = (TSlotIPC*)pipch->DataFramePtr;
// set up the item
p->cbSize = sizeof(TSlotIPC);
p->cbStrSection = nSize;
// update the frame ptr
pipch->DataFramePtr = (void*)PSP;
// let this item jump to the next yet-to-be-allocated-item which should be null anyway
p->Next = (TSlotIPC*)PSP;
return p;
}
void ipcFixupAddresses(BOOL FromServer, THeaderIPC *pipch)
{
if (pipch->pServerBaseAddress == pipch->pClientBaseAddress)
return;
INT_PTR diff = INT_PTR(pipch->pClientBaseAddress) - INT_PTR(pipch->pServerBaseAddress);
// fix up all the pointers in the header
if (pipch->IconsBegin != NULL)
pipch->IconsBegin = (TSlotIPC*)(UINT_PTR(pipch->IconsBegin) + diff);
if (pipch->ContactsBegin != NULL)
pipch->ContactsBegin = (TSlotIPC*)(UINT_PTR(pipch->ContactsBegin) + diff);
if (pipch->GroupsBegin != NULL)
pipch->GroupsBegin = (TSlotIPC*)(UINT_PTR(pipch->GroupsBegin) + diff);
if (pipch->NewIconsBegin != NULL)
pipch->NewIconsBegin = (TSlotIPC*)(UINT_PTR(pipch->NewIconsBegin) + diff);
pipch->DataPtr = (TSlotIPC*)(UINT_PTR(pipch->DataPtr) + diff);
pipch->DataPtrEnd = (TSlotIPC*)(UINT_PTR(pipch->DataPtrEnd) + diff);
pipch->DataFramePtr = (void*)(UINT_PTR(pipch->DataFramePtr) + diff);
// and the link list
TSlotIPC *pct = pipch->DataPtr;
while (pct != NULL) {
// the first pointer is already fixed up, have to get a pointer
// to the next pointer and modify where it jumps to
TSlotIPC **q = &pct->Next;
if (*q != NULL)
*q = (TSlotIPC*)(UINT_PTR(*q) + diff);
pct = *q;
}
}
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