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138 lines
3.5 KiB
138 lines
3.5 KiB
/************************************************************************
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Copyright (c) 1993 Microsoft Corporation
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Module Name :
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srvout.c
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Abstract :
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Contains routines for support of [out] parameters on server side during
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unmarshalling phase. This includes deferral, allocation and handle
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initialization.
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Author :
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Bruce McQuistan (brucemc) 12/93.
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Revision History :
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DKays 10/94 Major comment and code clean up.
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***********************************************************************/
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#include "ndrp.h"
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#include "hndl.h"
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#include "interp.h"
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void
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NdrOutInit(
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PMIDL_STUB_MESSAGE pStubMsg,
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PFORMAT_STRING pFormat,
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uchar ** ppArg
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)
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/*++
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Routine Description :
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This routine is called to manage server side issues for [out] params
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such as allocation and context handle initialization. Due to the fact
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that for [out] conformant objects on stack, their size descriptors may
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not have been unmarshalled when we need to know their size, this routine
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must be called after all other unmarshalling has occurred. Really, we
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could defer only [out], conformant data, but the logic in walking the
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format string to determine if an object is conformant does not warrant
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that principle, so all [out] data is deferred.
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Arguments :
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pStubMsg - Pointer to stub message.
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pFormat - Format string description for the type.
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ppArg - Location of argument on stack.
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Return :
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None.
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--*/
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{
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// Don't screw with this, it must be a signed long!
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long Size;
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//
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// Check for a non-Interface pointer (they have a much different format
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// than regular pointers).
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//
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if ( IS_BASIC_POINTER(*pFormat) )
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{
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//
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// Check for a pointer to a basetype (we don't have to worry about
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// a non-sized string pointer because these are not allowed as [out]
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// only.
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//
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if ( SIMPLE_POINTER(pFormat[1]) )
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{
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Size = SIMPLE_TYPE_MEMSIZE(pFormat[2]);
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goto DoAlloc;
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}
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//
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// Check for a pointer to a pointer.
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//
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if ( POINTER_DEREF(pFormat[1]) )
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{
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Size = sizeof(void *);
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goto DoAlloc;
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}
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// We have a pointer to complex type.
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pFormat += 2;
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pFormat += *(signed short *)pFormat;
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}
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if ( *pFormat == FC_BIND_CONTEXT )
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{
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NdrSaveContextHandle(
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pStubMsg,
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NDRSContextUnmarshall( 0, pStubMsg->RpcMsg->DataRepresentation ),
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ppArg,
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pFormat );
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return;
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}
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//
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// If we get here we have to make a call to size a complex type.
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//
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Size = (long) NdrpMemoryIncrement( pStubMsg,
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0,
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pFormat );
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DoAlloc:
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//
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// Check for a negative size. This an application error condition for
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// signed size specifiers.
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//
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if ( Size < 0 )
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RpcRaiseException( RPC_X_INVALID_BOUND );
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*ppArg = NdrAllocate( pStubMsg, (size_t) Size);
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MIDL_memset( *ppArg, 0, (size_t) Size );
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// We are almost done, except for an out ref to ref to ... etc.
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// If this is the case keep allocating pointees of ref pointers.
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if ( *pFormat == FC_RP && POINTER_DEREF(pFormat[1]) )
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{
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pFormat += 2;
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pFormat += *(signed short *)pFormat;
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if ( *pFormat == FC_RP )
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NdrOutInit( pStubMsg, pFormat, (uchar **) *ppArg );
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}
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}
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