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Sweden-Number/windows/dce.c

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/*
* USER DCE functions
*
* Copyright 1993 Alexandre Julliard
* 1996 Alex Korobka
*
*
* Note: Visible regions of CS_OWNDC/CS_CLASSDC window DCs
* have to be updated dynamically.
*
* Internal DCX flags:
*
* DCX_DCEBUSY - dce structure is in use
* DCX_KEEPCLIPRGN - do not delete clipping region in ReleaseDC
* DCX_WINDOWPAINT - BeginPaint specific flag
*/
#include "dce.h"
#include "class.h"
#include "win.h"
#include "gdi.h"
#include "heap.h"
#include "sysmetrics.h"
#include "stddebug.h"
/* #define DEBUG_DC */
#include "debug.h"
#define NB_DCE 5 /* Number of DCEs created at startup */
static DCE *firstDCE = 0;
static HDC32 defaultDCstate = 0;
/***********************************************************************
* DCE_AllocDCE
*
* Allocate a new DCE.
*/
DCE *DCE_AllocDCE( HWND32 hWnd, DCE_TYPE type )
{
DCE * dce;
if (!(dce = HeapAlloc( SystemHeap, 0, sizeof(DCE) ))) return NULL;
if (!(dce->hDC = CreateDC16( "DISPLAY", NULL, NULL, NULL )))
{
HeapFree( SystemHeap, 0, dce );
return 0;
}
/* store DCE handle in DC hook data field */
SetDCHook( dce->hDC, (FARPROC16)DCHook, (DWORD)dce );
dce->hwndCurrent = hWnd;
dce->hClipRgn = 0;
dce->next = firstDCE;
firstDCE = dce;
if( type != DCE_CACHE_DC )
{
dce->DCXflags = DCX_DCEBUSY;
if( hWnd )
{
WND* wnd = WIN_FindWndPtr(hWnd);
if( wnd->dwStyle & WS_CLIPCHILDREN ) dce->DCXflags |= DCX_CLIPCHILDREN;
if( wnd->dwStyle & WS_CLIPSIBLINGS ) dce->DCXflags |= DCX_CLIPSIBLINGS;
}
SetHookFlags(dce->hDC,DCHF_INVALIDATEVISRGN);
}
else dce->DCXflags = DCX_CACHE;
return dce;
}
/***********************************************************************
* DCE_FreeDCE
*/
void DCE_FreeDCE( DCE *dce )
{
DCE **ppDCE = &firstDCE;
if (!dce) return;
while (*ppDCE && (*ppDCE != dce)) ppDCE = &(*ppDCE)->next;
if (*ppDCE == dce) *ppDCE = dce->next;
SetDCHook(dce->hDC, NULL, 0L);
DeleteDC32( dce->hDC );
if( dce->hClipRgn && !(dce->DCXflags & DCX_KEEPCLIPRGN) )
DeleteObject32(dce->hClipRgn);
HeapFree( SystemHeap, 0, dce );
}
/**********************************************************************
* WindowFromDC16 (USER32.580)
*/
HWND16 WindowFromDC16( HDC16 hDC )
{
return (HWND16)WindowFromDC32( hDC );
}
/**********************************************************************
* WindowFromDC32 (USER32.580)
*/
HWND32 WindowFromDC32( HDC32 hDC )
{
DCE *dce = firstDCE;
while (dce && (dce->hDC != hDC)) dce = dce->next;
return dce ? dce->hwndCurrent : 0;
}
/***********************************************************************
* DCE_InvalidateDCE
*
* It is called from SetWindowPos - we have to invalidate all busy
* DCE's for windows whose client rect intersects with update rectangle
*/
BOOL32 DCE_InvalidateDCE(WND* wndScope, RECT16* pRectUpdate)
{
BOOL32 bRet = FALSE;
DCE *dce;
if( !wndScope ) return 0;
dprintf_dc(stddeb,"InvalidateDCE: scope hwnd = %04x, (%i,%i - %i,%i)\n",
wndScope->hwndSelf, pRectUpdate->left,pRectUpdate->top,
pRectUpdate->right,pRectUpdate->bottom);
/* walk all DCE's */
for (dce = firstDCE; (dce); dce = dce->next)
{
if( dce->DCXflags & DCX_DCEBUSY )
{
WND * wndCurrent, * wnd;
wnd = wndCurrent = WIN_FindWndPtr(dce->hwndCurrent);
/* desktop is not critical (DC is not owned anyway) */
if( wnd == WIN_GetDesktop() ) continue;
/* check if DCE window is within z-order scope */
for( ; wnd ; wnd = wnd->parent )
if( wnd == wndScope )
{
RECT16 wndRect = wndCurrent->rectWindow;
dprintf_dc(stddeb,"\tgot hwnd %04x\n", wndCurrent->hwndSelf);
MapWindowPoints16(wndCurrent->parent->hwndSelf, wndScope->hwndSelf,
(LPPOINT16)&wndRect, 2);
if( IntersectRect16(&wndRect,&wndRect,pRectUpdate) )
{
SetHookFlags(dce->hDC, DCHF_INVALIDATEVISRGN);
bRet = TRUE;
}
break;
}
}
}
return bRet;
}
/***********************************************************************
* DCE_Init
*/
void DCE_Init()
{
int i;
DCE * dce;
for (i = 0; i < NB_DCE; i++)
{
if (!(dce = DCE_AllocDCE( 0, DCE_CACHE_DC ))) return;
if (!defaultDCstate) defaultDCstate = GetDCState( dce->hDC );
}
}
/***********************************************************************
* DCE_GetVisRect
*
* Calc the visible rectangle of a window, i.e. the client or
* window area clipped by the client area of all ancestors.
* Return FALSE if the visible region is empty.
*/
static BOOL DCE_GetVisRect( WND *wndPtr, BOOL clientArea, RECT16 *lprect )
{
int xoffset, yoffset;
*lprect = clientArea ? wndPtr->rectClient : wndPtr->rectWindow;
xoffset = lprect->left;
yoffset = lprect->top;
if (!(wndPtr->dwStyle & WS_VISIBLE) || (wndPtr->flags & WIN_NO_REDRAW))
{
SetRectEmpty16( lprect ); /* Clip everything */
return FALSE;
}
while (wndPtr->parent)
{
wndPtr = wndPtr->parent;
if (!(wndPtr->dwStyle & WS_VISIBLE) ||
(wndPtr->flags & WIN_NO_REDRAW) ||
(wndPtr->dwStyle & WS_ICONIC))
{
SetRectEmpty16( lprect ); /* Clip everything */
return FALSE;
}
xoffset += wndPtr->rectClient.left;
yoffset += wndPtr->rectClient.top;
OffsetRect16( lprect, wndPtr->rectClient.left,
wndPtr->rectClient.top );
/* Warning!! we assume that IntersectRect() handles the case */
/* where the destination is the same as one of the sources. */
if (!IntersectRect16( lprect, lprect, &wndPtr->rectClient ))
return FALSE; /* Visible rectangle is empty */
}
OffsetRect16( lprect, -xoffset, -yoffset );
return TRUE;
}
/***********************************************************************
* DCE_ClipWindows
*
* Go through the linked list of windows from hwndStart to hwndEnd,
* removing from the given region the rectangle of each window offset
* by a given amount. The new region is returned, and the original one
* is destroyed. Used to implement DCX_CLIPSIBLINGS and
* DCX_CLIPCHILDREN styles.
*/
static HRGN32 DCE_ClipWindows( WND *pWndStart, WND *pWndEnd,
HRGN32 hrgn, int xoffset, int yoffset )
{
HRGN32 hrgnNew;
if (!pWndStart) return hrgn;
if (!(hrgnNew = CreateRectRgn32( 0, 0, 0, 0 )))
{
DeleteObject32( hrgn );
return 0;
}
for (; pWndStart != pWndEnd; pWndStart = pWndStart->next)
{
if (!(pWndStart->dwStyle & WS_VISIBLE)) continue;
SetRectRgn( hrgnNew, pWndStart->rectWindow.left + xoffset,
pWndStart->rectWindow.top + yoffset,
pWndStart->rectWindow.right + xoffset,
pWndStart->rectWindow.bottom + yoffset );
if (!CombineRgn32( hrgn, hrgn, hrgnNew, RGN_DIFF )) break;
}
DeleteObject32( hrgnNew );
if (pWndStart != pWndEnd) /* something went wrong */
{
DeleteObject32( hrgn );
return 0;
}
return hrgn;
}
/***********************************************************************
* DCE_GetVisRgn
*
* Return the visible region of a window, i.e. the client or window area
* clipped by the client area of all ancestors, and then optionally
* by siblings and children.
*/
HRGN32 DCE_GetVisRgn( HWND32 hwnd, WORD flags )
{
RECT16 rect;
HRGN32 hrgn;
int xoffset, yoffset;
WND *wndPtr = WIN_FindWndPtr( hwnd );
/* Get visible rectangle and create a region with it.
* do we really need to calculate vis rgns for X windows?
* - yes, to clip child windows but we should skip
* siblings in this case.
*/
if (!wndPtr || !DCE_GetVisRect( wndPtr, !(flags & DCX_WINDOW), &rect ))
{
return CreateRectRgn32( 0, 0, 0, 0 ); /* Visible region is empty */
}
if (!(hrgn = CreateRectRgnIndirect16( &rect ))) return 0;
/* Clip all children from the visible region */
if (flags & DCX_CLIPCHILDREN)
{
if (flags & DCX_WINDOW)
{
xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
}
else xoffset = yoffset = 0;
hrgn = DCE_ClipWindows( wndPtr->child, NULL, hrgn, xoffset, yoffset );
if (!hrgn) return 0;
}
/* Clip siblings placed above this window */
if (flags & DCX_WINDOW)
{
xoffset = -wndPtr->rectWindow.left;
yoffset = -wndPtr->rectWindow.top;
}
else
{
xoffset = -wndPtr->rectClient.left;
yoffset = -wndPtr->rectClient.top;
}
if (flags & DCX_CLIPSIBLINGS)
{
hrgn = DCE_ClipWindows( wndPtr->parent ? wndPtr->parent->child : NULL,
wndPtr, hrgn, xoffset, yoffset );
if (!hrgn) return 0;
}
/* Clip siblings of all ancestors that have the WS_CLIPSIBLINGS style */
while (wndPtr->dwStyle & WS_CHILD)
{
wndPtr = wndPtr->parent;
xoffset -= wndPtr->rectClient.left;
yoffset -= wndPtr->rectClient.top;
hrgn = DCE_ClipWindows( wndPtr->parent ? wndPtr->parent->child : NULL,
wndPtr, hrgn, xoffset, yoffset );
if (!hrgn) return 0;
}
return hrgn;
}
/***********************************************************************
* DCE_SetDrawable
*
* Set the drawable, origin and dimensions for the DC associated to
* a given window.
*/
static void DCE_SetDrawable( WND *wndPtr, DC *dc, WORD flags )
{
if (!wndPtr) /* Get a DC for the whole screen */
{
dc->w.DCOrgX = 0;
dc->w.DCOrgY = 0;
dc->u.x.drawable = rootWindow;
XSetSubwindowMode( display, dc->u.x.gc, IncludeInferiors );
}
else
{
if (flags & DCX_WINDOW)
{
dc->w.DCOrgX = wndPtr->rectWindow.left;
dc->w.DCOrgY = wndPtr->rectWindow.top;
}
else
{
dc->w.DCOrgX = wndPtr->rectClient.left;
dc->w.DCOrgY = wndPtr->rectClient.top;
}
while (!wndPtr->window)
{
wndPtr = wndPtr->parent;
dc->w.DCOrgX += wndPtr->rectClient.left;
dc->w.DCOrgY += wndPtr->rectClient.top;
}
dc->w.DCOrgX -= wndPtr->rectWindow.left;
dc->w.DCOrgY -= wndPtr->rectWindow.top;
dc->u.x.drawable = wndPtr->window;
}
}
/***********************************************************************
* DCE_ExcludeRgn
*
* Translate given region from the wnd client to the DC coordinates
* and add it to the clipping region.
*/
INT16 DCE_ExcludeRgn( HDC32 hDC, WND* wnd, HRGN32 hRgn )
{
INT16 ret;
POINT32 pt = {0, 0};
HRGN32 hRgnClip = GetClipRgn16( hDC );
DCE *dce = firstDCE;
while (dce && (dce->hDC != hDC)) dce = dce->next;
if( dce )
{
MapWindowPoints32( wnd->hwndSelf, dce->hwndCurrent, &pt, 1);
if( dce->DCXflags & DCX_WINDOW )
{
wnd = WIN_FindWndPtr(dce->hwndCurrent);
pt.x += wnd->rectClient.left - wnd->rectWindow.left;
pt.y += wnd->rectClient.top - wnd->rectWindow.top;
}
}
else return ERROR;
OffsetRgn32(hRgn, pt.x, pt.y);
if( hRgnClip ) ret = CombineRgn32( hRgnClip, hRgnClip, hRgn, RGN_DIFF );
else
{
hRgnClip = InquireVisRgn( hDC );
ret = CombineRgn32( hRgn, hRgnClip, hRgn, RGN_DIFF );
SelectClipRgn32( hDC, hRgn );
}
return ret;
}
/***********************************************************************
* GetDCEx16 (USER.359)
*/
HDC16 GetDCEx16( HWND16 hwnd, HRGN16 hrgnClip, DWORD flags )
{
return (HDC16)GetDCEx32( hwnd, hrgnClip, flags );
}
/***********************************************************************
* GetDCEx32 (USER32.230)
*
* Unimplemented flags: DCX_LOCKWINDOWUPDATE
*/
HDC32 GetDCEx32( HWND32 hwnd, HRGN32 hrgnClip, DWORD flags )
{
HRGN32 hrgnVisible;
HDC32 hdc = 0;
DCE * dce;
DC * dc;
WND * wndPtr;
DWORD dcx_flags = 0;
BOOL need_update = TRUE;
dprintf_dc(stddeb,"GetDCEx: hwnd %04x, hrgnClip %04x, flags %08x\n", hwnd, hrgnClip, (unsigned)flags);
if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
if (!(wndPtr->class->style & (CS_OWNDC | CS_CLASSDC))) flags |= DCX_CACHE;
if (flags & DCX_USESTYLE)
{
flags &= ~( DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
if( wndPtr->dwStyle & WS_CLIPSIBLINGS )
flags |= DCX_CLIPSIBLINGS;
if ( !(flags & DCX_WINDOW) )
{
if (wndPtr->class->style & CS_PARENTDC) flags |= DCX_PARENTCLIP;
if (wndPtr->dwStyle & WS_CLIPCHILDREN &&
!(wndPtr->dwStyle & WS_MINIMIZE) ) flags |= DCX_CLIPCHILDREN;
}
else flags |= DCX_CACHE;
}
if( flags & DCX_NOCLIPCHILDREN )
{
flags |= DCX_CACHE;
flags &= ~(DCX_PARENTCLIP | DCX_CLIPCHILDREN);
}
if (hwnd == GetDesktopWindow32() || !(wndPtr->dwStyle & WS_CHILD))
flags &= ~DCX_PARENTCLIP;
if (flags & DCX_WINDOW) flags = (flags & ~DCX_CLIPCHILDREN) | DCX_CACHE;
if( flags & DCX_PARENTCLIP )
{
flags |= DCX_CACHE;
if( !(flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) )
if( (wndPtr->dwStyle & WS_VISIBLE) && (wndPtr->parent->dwStyle & WS_VISIBLE) )
{
flags &= ~DCX_CLIPCHILDREN;
if( wndPtr->parent->dwStyle & WS_CLIPSIBLINGS )
flags |= DCX_CLIPSIBLINGS;
}
}
if (flags & DCX_CACHE)
{
for (dce = firstDCE; (dce); dce = dce->next)
{
if ((dce->DCXflags & DCX_CACHE) && !(dce->DCXflags & DCX_DCEBUSY)) break;
}
}
else
{
dce = (wndPtr->class->style & CS_OWNDC)?wndPtr->dce:wndPtr->class->dce;
if( dce->hwndCurrent == hwnd )
{
dprintf_dc(stddeb,"\tskipping hVisRgn update\n");
need_update = FALSE;
}
if( hrgnClip && dce->hClipRgn && !(dce->DCXflags & DCX_KEEPCLIPRGN))
{
fprintf(stdnimp,"GetDCEx: hClipRgn collision!\n");
DeleteObject32( dce->hClipRgn );
need_update = TRUE;
}
}
dcx_flags = flags & ( DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_CACHE | DCX_WINDOW | DCX_WINDOWPAINT);
if (!dce) return 0;
dce->hwndCurrent = hwnd;
dce->hClipRgn = 0;
dce->DCXflags = dcx_flags | DCX_DCEBUSY;
hdc = dce->hDC;
if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return 0;
DCE_SetDrawable( wndPtr, dc, flags );
if( need_update || dc->w.flags & DC_DIRTY )
{
dprintf_dc(stddeb,"updating hDC anyway\n");
if (flags & DCX_PARENTCLIP)
{
WND *parentPtr = wndPtr->parent;
dcx_flags = flags & ~(DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
DCX_WINDOW);
if (parentPtr->dwStyle & WS_CLIPSIBLINGS)
dcx_flags |= DCX_CLIPSIBLINGS;
hrgnVisible = DCE_GetVisRgn( parentPtr->hwndSelf, dcx_flags );
if (flags & DCX_WINDOW)
OffsetRgn32( hrgnVisible, -wndPtr->rectWindow.left,
-wndPtr->rectWindow.top );
else OffsetRgn32( hrgnVisible, -wndPtr->rectClient.left,
-wndPtr->rectClient.top );
}
/* optimize away GetVisRgn for desktop if it isn't there */
else if ((hwnd == GetDesktopWindow32()) &&
(rootWindow == DefaultRootWindow(display)))
hrgnVisible = CreateRectRgn32( 0, 0, SYSMETRICS_CXSCREEN,
SYSMETRICS_CYSCREEN );
else hrgnVisible = DCE_GetVisRgn( hwnd, flags );
if( wndPtr->parent && wndPtr->window )
{
WND* wnd = wndPtr->parent->child;
RECT16 rect;
for( ; wnd != wndPtr; wnd = wnd->next )
if( wnd->class->style & CS_SAVEBITS &&
wnd->dwStyle & WS_VISIBLE &&
IntersectRect16(&rect, &wndPtr->rectClient, &wnd->rectClient) )
wnd->flags |= WIN_SAVEUNDER_OVERRIDE;
}
dc->w.flags &= ~DC_DIRTY;
SelectVisRgn( hdc, hrgnVisible );
}
else hrgnVisible = CreateRectRgn32( 0, 0, 0, 0 );
if ((flags & DCX_INTERSECTRGN) || (flags & DCX_EXCLUDERGN))
{
dce->DCXflags |= flags & (DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_EXCLUDERGN);
dce->hClipRgn = hrgnClip;
dprintf_dc(stddeb, "\tsaved VisRgn, clipRgn = %04x\n", hrgnClip);
SaveVisRgn( hdc );
CombineRgn32( hrgnVisible, InquireVisRgn( hdc ), hrgnClip,
(flags & DCX_INTERSECTRGN) ? RGN_AND : RGN_DIFF );
SelectVisRgn( hdc, hrgnVisible );
}
DeleteObject32( hrgnVisible );
dprintf_dc(stddeb, "GetDCEx(%04x,%04x,0x%lx): returning %04x\n",
hwnd, hrgnClip, flags, hdc);
return hdc;
}
/***********************************************************************
* GetDC16 (USER.66)
*/
HDC16 GetDC16( HWND16 hwnd )
{
return (HDC16)GetDC32( hwnd );
}
/***********************************************************************
* GetDC32 (USER32.229)
*/
HDC32 GetDC32( HWND32 hwnd )
{
if (!hwnd)
return GetDCEx32( GetDesktopWindow32(), 0, DCX_CACHE | DCX_WINDOW );
return GetDCEx32( hwnd, 0, DCX_USESTYLE );
}
/***********************************************************************
* GetWindowDC16 (USER.67)
*/
HDC16 GetWindowDC16( HWND16 hwnd )
{
if (!hwnd) hwnd = GetDesktopWindow16();
return GetDCEx16( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
}
/***********************************************************************
* GetWindowDC32 (USER32.)
*/
HDC32 GetWindowDC32( HWND32 hwnd )
{
if (!hwnd) hwnd = GetDesktopWindow32();
return GetDCEx32( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
}
/***********************************************************************
* ReleaseDC16 (USER.68)
*/
INT16 ReleaseDC16( HWND16 hwnd, HDC16 hdc )
{
return (INT32)ReleaseDC32( hwnd, hdc );
}
/***********************************************************************
* ReleaseDC32 (USER32.439)
*/
INT32 ReleaseDC32( HWND32 hwnd, HDC32 hdc )
{
DCE * dce = firstDCE;
dprintf_dc(stddeb, "ReleaseDC: %04x %04x\n", hwnd, hdc );
while (dce && (dce->hDC != hdc)) dce = dce->next;
if (!dce) return 0;
if (!(dce->DCXflags & DCX_DCEBUSY) ) return 0;
/* restore previous visible region */
if ( dce->DCXflags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN) &&
(dce->DCXflags & DCX_CACHE || dce->DCXflags & DCX_WINDOWPAINT) )
{
dprintf_dc(stddeb,"\tcleaning up visrgn...\n");
dce->DCXflags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN | DCX_WINDOWPAINT);
if( dce->DCXflags & DCX_KEEPCLIPRGN )
dce->DCXflags &= ~DCX_KEEPCLIPRGN;
else
if( dce->hClipRgn > 1 )
DeleteObject32( dce->hClipRgn );
dce->hClipRgn = 0;
RestoreVisRgn(dce->hDC);
}
if (dce->DCXflags & DCX_CACHE)
{
SetDCState( dce->hDC, defaultDCstate );
dce->DCXflags = DCX_CACHE;
dce->hwndCurrent = 0;
}
return 1;
}
/***********************************************************************
* DCHook (USER.362)
*
* See "Undoc. Windows" for hints (DC, SetDCHook, SetHookFlags)..
*/
BOOL16 DCHook( HDC16 hDC, WORD code, DWORD data, LPARAM lParam )
{
HRGN32 hVisRgn;
DCE *dce = firstDCE;;
dprintf_dc(stddeb,"DCHook: hDC = %04x, %i\n", hDC, code);
while (dce && (dce->hDC != hDC)) dce = dce->next;
if (!dce) return 0;
switch( code )
{
case DCHC_INVALIDVISRGN:
{
if( dce->DCXflags & DCX_DCEBUSY )
{
SetHookFlags(hDC, DCHF_VALIDATEVISRGN);
hVisRgn = DCE_GetVisRgn(dce->hwndCurrent, dce->DCXflags);
dprintf_dc(stddeb,"\tapplying saved clipRgn\n");
/* clip this region with saved clipping region */
if ( (dce->DCXflags & DCX_INTERSECTRGN && dce->hClipRgn != 1) ||
( dce->DCXflags & DCX_EXCLUDERGN && dce->hClipRgn) )
{
if( (!dce->hClipRgn && dce->DCXflags & DCX_INTERSECTRGN) ||
(dce->hClipRgn == 1 && dce->DCXflags & DCX_EXCLUDERGN) )
SetRectRgn(hVisRgn,0,0,0,0);
else
CombineRgn32(hVisRgn, hVisRgn, dce->hClipRgn,
(dce->DCXflags & DCX_EXCLUDERGN)? RGN_DIFF:RGN_AND);
}
SelectVisRgn(hDC, hVisRgn);
DeleteObject32( hVisRgn );
}
else
dprintf_dc(stddeb,"DCHook: DC is not in use!\n");
}
break;
case DCHC_DELETEDC: /* FIXME: ?? */
break;
default:
fprintf(stdnimp,"DCHook: unknown code\n");
}
return 0;
}
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