139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
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/**************************************************************************
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* LOCAL.C
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*
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* Routines used to walk local heaps
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*
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**************************************************************************/
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#include "toolpriv.h"
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/* ----- Function prototypes ----- */
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NOEXPORT void NEAR PASCAL ComputeType(
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LOCALENTRY FAR *lpLocal);
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/* LocalInfo
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* Reports information about the state of the indicated heap
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*/
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BOOL TOOLHELPAPI LocalInfo(
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LOCALINFO FAR *lpLocalInfo,
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HANDLE hHeap)
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{
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/* Check the version number and verify proper installation */
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if (!wLibInstalled || !lpLocalInfo ||
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lpLocalInfo->dwSize != sizeof (LOCALINFO))
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return FALSE;
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/* Get the item counts */
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if (wTHFlags & TH_KERNEL_386)
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lpLocalInfo->wcItems = WalkLoc386Count(hHeap);
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else
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lpLocalInfo->wcItems = WalkLoc286Count(hHeap);
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return TRUE;
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}
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/* LocalFirst
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* Finds the first block on a local heap.
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*/
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BOOL TOOLHELPAPI LocalFirst(
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LOCALENTRY FAR *lpLocal,
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HANDLE hHeap)
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{
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WORD wFirst;
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/* Check the version number and verify proper installation */
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if (!wLibInstalled || !lpLocal || lpLocal->dwSize != sizeof (LOCALENTRY))
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return FALSE;
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/* Convert the heap variable to a selector */
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hHeap = HelperHandleToSel(hHeap);
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/* Get the first item from the heap */
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if (wTHFlags & TH_KERNEL_386)
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{
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if (!(wFirst = WalkLoc386First(hHeap)))
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return FALSE;
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}
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else
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{
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if (!(wFirst = WalkLoc286First(hHeap)))
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return FALSE;
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}
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/* Fill in other miscellaneous stuff */
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lpLocal->hHeap = hHeap;
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/* Get information about this item */
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if (wTHFlags & TH_KERNEL_386)
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WalkLoc386(wFirst, lpLocal, hHeap);
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else
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WalkLoc286(wFirst, lpLocal, hHeap);
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/* Guess at the type of the object */
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ComputeType(lpLocal);
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return TRUE;
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}
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/* LocalNext
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* Continues a local heap walk by getting information about the
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* next item.
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*/
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BOOL TOOLHELPAPI LocalNext(
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LOCALENTRY FAR *lpLocal)
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{
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/* Check the version number and verify proper installation */
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if (!wLibInstalled || !lpLocal || lpLocal->dwSize != sizeof (LOCALENTRY))
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return FALSE;
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if (wTHFlags & TH_KERNEL_386)
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WalkLoc386(lpLocal->wNext, lpLocal, lpLocal->hHeap);
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else
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WalkLoc286(lpLocal->wNext, lpLocal, lpLocal->hHeap);
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/* See if this item is the last one. If so, return done because this
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* last item is NOT useful.
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*/
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if (!lpLocal->wNext)
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return FALSE;
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/* Guess at the type of the object */
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ComputeType(lpLocal);
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return TRUE;
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}
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/* ComputeType
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* Computes the object type of an object
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*/
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NOEXPORT void NEAR PASCAL ComputeType(
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LOCALENTRY FAR *lpLocal)
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{
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/* Decode the free/fixed/moveable bits */
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if (lpLocal->wFlags & 2)
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lpLocal->wFlags = LF_MOVEABLE;
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else if (lpLocal->wFlags & 1)
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lpLocal->wFlags = LF_FIXED;
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else
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{
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/* Free blocks never have a unique type so return */
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lpLocal->wFlags = LF_FREE;
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lpLocal->wType = LT_FREE;
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lpLocal->hHandle = NULL;
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return;
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}
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/* Decode the heap type if possible */
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UserGdiType(lpLocal);
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}
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