142 lines
3.6 KiB
C++
142 lines
3.6 KiB
C++
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/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Copyright (c) 1995-1999 Microsoft Corporation
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Module Name:
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pipendr.cxx
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Abstract:
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Contains routines for the generation of the new NDR format strings for
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pipe types.
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Notes:
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History:
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SteveBl Dec-1995 Created.
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----------------------------------------------------------------------------*/
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#include "becls.hxx"
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extern CMD_ARG * pCommand;
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#pragma hdrstop
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void
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CG_PIPE::GenNdrFormat( CCB * pCCB )
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/*++
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The format string is:
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FC_PIPE
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flags & alignment<1> // pointer flags on the higher nibble
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index to type desc<2> // the usual
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memory size<2>
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buffer size<2> // wire size, essential
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If either memory size or buffer size > 64k then
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the FC_BIG_PIPE flag is set and the following format string is used:
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FC_PIPE
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flags & alignment<1>
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index to type desc<2>
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memory size<4>
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buffer size<4>
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--*/
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{
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if ( GetFormatStringOffset() != -1 )
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return;
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pCommand->GetNdrVersionControl().SetHasRawPipes();
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FORMAT_STRING * pFormatString;
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CG_NDR * pChild;
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long ChildOffset;
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// Format offset
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pFormatString = pCCB->GetFormatString();
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pChild = (CG_NDR *) GetChild();
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MIDL_ASSERT( pChild );
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// Do this in case the child is a simple type.
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ChildOffset = pFormatString->GetCurrentOffset();
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pChild->GenNdrFormat( pCCB );
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// Again, do this in case the child is a simple type.
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pFormatString->Align();
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SetFormatStringOffset( pFormatString->GetCurrentOffset() );
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// Real stuff now
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pFormatString->PushFormatChar( FC_PIPE );
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// Compute the memory size and buffer size.
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// Account for alignment
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unsigned long uMemorySize = pChild->GetMemorySize();
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unsigned long uBufferSize = pChild->HasAFixedBufferSize()
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? pChild->GetWireSize()
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: 0;
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// Now the flag byte.
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unsigned char FlagByte = unsigned char(pChild->GetWireAlignment() - 1);
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if (uMemorySize > 0xffff || uBufferSize > 0xffff)
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FlagByte |= FC_BIG_PIPE;
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if ( IsObjectPipe() )
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FlagByte |= FC_OBJECT_PIPE;
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if ( GetRangeAttribute() )
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{
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FlagByte |= FC_PIPE_HAS_RANGE;
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}
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pFormatString->PushByte( FlagByte );
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// Now the index to the type desc
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if ( pChild->IsSimpleType() )
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{
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pFormatString->PushShortOffset(
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ChildOffset - pFormatString->GetCurrentOffset() );
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}
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else
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{
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pFormatString->PushShortOffset(
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pChild->GetFormatStringOffset() -
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pFormatString->GetCurrentOffset() );
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}
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// Now push the memory size and buffer size.
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if (FlagByte & FC_BIG_PIPE)
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{
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pFormatString->PushLong( uMemorySize);
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pFormatString->PushLong( uBufferSize);
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}
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else
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{
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pFormatString->PushShort( (short) uMemorySize);
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pFormatString->PushShort( (short) uBufferSize);
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}
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if ( GetRangeAttribute() )
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{
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// RKK64: TBD support for a range check on hyper.
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pFormatString->PushLong( (ulong) GetRangeAttribute()->GetMinExpr()->GetValue() ); // min.
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pFormatString->PushLong( (ulong) GetRangeAttribute()->GetMaxExpr()->GetValue() ); // max.
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}
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SetFormatStringEndOffset( pFormatString->GetCurrentOffset() );
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pFormatString->OptimizeFragment( this );
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}
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