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1035 lines
33 KiB
1035 lines
33 KiB
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1994 - 1999
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//
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// File: tblvarnt.hxx
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//
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// Contents: Helper class for PROPVARIANTs in tables
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//
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// Classes: CTableVariant - PROPVARIANT wrapper; adds useful methods
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//
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// History: 28 Jan 1994 AlanW Created
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//
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//--------------------------------------------------------------------------
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#pragma once
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#include <tblalloc.hxx>
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// A few useful defines and inline funcs.
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#define BSTRLEN(bstrVal) *((ULONG *) bstrVal - 1)
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inline BOOL IsLPWSTR(VARTYPE vt) { return VT_LPWSTR == vt;}
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inline BOOL IsLPSTR(VARTYPE vt) { return VT_LPSTR == vt;}
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inline BOOL IsVector(VARTYPE vt) { return 0 != ( vt & VT_VECTOR );}
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inline BOOL IsArray(VARTYPE vt) { return 0 != ( vt & VT_ARRAY );}
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inline BOOL IsVectorOrArray(VARTYPE vt)
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{
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return 0 != ( vt & (VT_VECTOR | VT_ARRAY));
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}
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inline BOOL StatusSuccess(DBSTATUS status)
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{
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return (status == DBSTATUS_S_OK ||
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status == DBSTATUS_S_ISNULL ||
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status == DBSTATUS_S_TRUNCATED ||
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status == DBSTATUS_S_DEFAULT);
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}
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//+-------------------------------------------------------------------------
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//
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// Class: CTableVariant
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//
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// Purpose: Wraps PROPVARIANT struct, adding useful methods.
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//
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// Interface:
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//
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// Notes: Because the underlying base data *is* a variant, this
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// class cannot have any non-static members (including
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// a vtable).
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//
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// This class now deals only with PROPVARIANT. If conversion
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// to other OLE-DB types or Automation variant types is needed,
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// use COLEDBVaraint class (which derives from this class).
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//
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// The class is also used to extend the PROPVARIANT for use
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// internally in tables. For internal storage, the
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// PROPVARIANT.reserved2 field is used to store the total
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// size of variable data pointed to by the variant.
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// Also, the pointers within internal variants may
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// be offsets to storage. There are three cases of
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// the way offsets may be stored.
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//
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// The pointer inside the internal variant structure
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// itself (to a vector, string, blob or UUID) is an
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// offset based from the variable data allocator used
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// to allocate the space.
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//
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// For vectors which contain pointers (e.g., vectors of
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// strings), the pointers are stored as offsets based from
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// the vector's address.
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//
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// For vectors of variants, the above two rules apply to
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// each embedded variant. The rules apply recursively to
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// embedded variants which are vectors of variant.
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//
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// Use of these rules permits the variable data of a variant
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// to be treated as a unit and to be block copied from place
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// to place without affecting the internally stored offsets.
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//
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// History: 21 Mar 1994 AlanW Created
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// 09 Jan 1998 VikasMan Mofified the class to deal ONLY
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// with PROPVARIANTs. Moved rest of
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// the functionality in the
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// COLEDBVaraiant class
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// 01 Sep 1999 KLam Reinstated FixDataPointers used
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// for Win64 Clients -> Win32 Servers
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// 04 Nov 1999 KLam Added VarDataSize32
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// for Win64 Servers -> Win32 Clients
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//
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//--------------------------------------------------------------------------
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class CTableVariant: public tagPROPVARIANT {
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public:
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//
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// varntData is indexed by variant type, and gives the width,
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// alignment constraints and other information for a scalar
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// variant type.
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//
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struct VARNT_DATA {
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USHORT width; // width in bytes of data
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USHORT alignment; // required alignment of data
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USHORT flags; // flags about variants
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};
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static const VARNT_DATA varntData[], varntExtData[];
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static const unsigned cVarntData, cVarntExtData;
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#ifdef _WIN64
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static const VARNT_DATA varntData32[], varntExtData32[];
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#endif
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enum varntDataFlags {
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CanBeVector = 1, // vector forms are permitted
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ByRef = 2, // variant data has pointer to real data
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CntRef = 4, // variant data has count followed by pointer
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StoreDirect = 8, // variant form is indirect, store as fixed
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MultiSize = 0x10, // used for chapters and bookmarks, for data
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// like UI1 that is inline in client output
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SimpleType = 0x20, // simple inline datatype, like VT_I4
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OAType = 0x40, // valid type for automation VARIANT
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};
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static BOOL IsSimpleType( VARTYPE vtype )
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{
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const VARNT_DATA & rvarInfo = _FindVarType( vtype );
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return ( 0 != ( rvarInfo.flags & SimpleType ) );
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}
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static BOOL IsSimpleOAType( VARTYPE vtype )
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{
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const VARNT_DATA & rvarInfo = _FindVarType( vtype );
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return ( (SimpleType|OAType) == ( rvarInfo.flags & (SimpleType|OAType ) ) );
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}
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static BOOL CanBeVectorType( VARTYPE vtype )
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{
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const VARNT_DATA & rvarInfo = _FindVarType( vtype );
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return ( 0 != ( rvarInfo.flags & CanBeVector ) );
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}
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// NOTE: in NT5, VARIANT can include additional types. This operates on
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// the traditional types so old clients can understand the variants
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// we produce.
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static BOOL IsOAType( VARTYPE vtype )
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{
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const VARNT_DATA & rvarInfo = _FindVarType( vtype );
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return ( 0 != ( rvarInfo.flags & OAType ) );
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}
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static BOOL IsByRef( VARTYPE vtype )
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{
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const VARNT_DATA & rvarInfo = _FindVarType( vtype );
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return ( 0 != ( rvarInfo.flags & ByRef ) );
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}
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//
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// Return information about a variant's base type
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//
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static void VartypeInfo(VARTYPE vtype, USHORT& rcbWidth,
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USHORT& rcbAlign, USHORT& rgfFlags) {
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const VARNT_DATA& rvarInfo = _FindVarType(vtype);
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rcbWidth = rvarInfo.width;
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rcbAlign = rvarInfo.alignment;
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rgfFlags = rvarInfo.flags;
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if (vtype & VT_VECTOR) {
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rgfFlags |= CntRef;
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}
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return;
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}
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//
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// Check if a type is stored in-line in a table row.
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//
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static BOOL TableIsStoredInline( USHORT fFlags, VARTYPE vtype )
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{
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if (vtype & (VT_ARRAY | VT_VECTOR | VT_BYREF) ||
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vtype == VT_VARIANT ||
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(fFlags & (CntRef | ByRef) && ! (fFlags & StoreDirect)))
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return FALSE;
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return TRUE;
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}
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static void Free(BYTE * pbData,
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VARTYPE vtData,
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PVarAllocator & rPool);
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//
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// Return TRUE iff the variant's type is valid for a property.
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//
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BOOL IsValidType(void) const
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{
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// NOTE: we don't expect VT_BYREF in our stored variants
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if ( (vt & ~(VT_TYPEMASK | VT_VECTOR | VT_ARRAY)) != 0 ||
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(vt & (VT_VECTOR | VT_ARRAY)) == (VT_VECTOR | VT_ARRAY) )
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return FALSE;
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const VARNT_DATA& rvarInfo = _FindVarType(vt);
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if (vt & VT_VECTOR)
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return ((rvarInfo.flags & CanBeVector) == CanBeVector);
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if (vt & VT_ARRAY)
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return ((rvarInfo.flags & (OAType|CanBeVector)) != 0);
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return rvarInfo.width != 0;
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}
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//
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// Return TRUE iff the variant contains a pointer at offset 8
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//
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BOOL VariantPointerInFirstWord (void) const
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{
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return ( (vt & (VT_ARRAY | VT_BYREF)) != 0 ||
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( (vt & VT_VECTOR) == 0 &&
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(_FindVarType(vt).flags & ByRef) == ByRef) );
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// return ((vt == VT_CLSID) ||
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// (vt == VT_LPWSTR) ||
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// (vt == VT_LPSTR) ||
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// (vt == VT_BSTR) ||
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// (vt == VT_CF) ||
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// (vt == VT_STREAM) ||
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// (vt == VT_STREAMED_OBJECT) ||
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// (vt == VT_STORAGE) ||
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// (vt == VT_STORED_OBJECT));
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}
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//
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// Return TRUE iff the variant contains a pointer at offset 0xC
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//
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BOOL VariantPointerInSecondWord (void) const
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{
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return ( (vt & VT_VECTOR) == VT_VECTOR ||
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( (vt & (VT_ARRAY | VT_BYREF)) == 0 &&
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(_FindVarType(vt).flags & CntRef) == CntRef) );
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}
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//
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// Copy data stored outside the variant structure itself
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//
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void Copy( CTableVariant* pvarntDest,
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PVarAllocator &rVarAllocator,
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USHORT cbDest,
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BYTE* pbBias = 0) const;
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void OffsetsToPointers(PVarAllocator &rPool)
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{
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if ( VariantPointerInFirstWord() )
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pszVal = (LPSTR) rPool.OffsetToPointer((ULONG_PTR) pszVal);
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else if ( VariantPointerInSecondWord() )
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blob.pBlobData = (BYTE *) rPool.OffsetToPointer((ULONG_PTR) blob.pBlobData);
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}
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DBSTATUS CopyOrCoerce( BYTE * pbDest,
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DBLENGTH cbDest,
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VARTYPE vtDest,
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DBLENGTH & rcbDstLen,
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PVarAllocator & rVarAllocator) const;
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//
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// Compute variable data size
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//
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ULONG VarDataSize (void) const;
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#ifdef _WIN64
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//
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// Convert offsets to pointers in variable data (32server->64client)
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//
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void FixDataPointers( BYTE* pbBias, CFixedVarAllocator *pAlloc );
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//
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// Compute variable data size for 32 bit
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//
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ULONG VarDataSize32 ( BYTE *pbBase,
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ULONG_PTR ulpOffset ) const;
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//
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// Compute the size of a safearray for 32 bit
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//
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static ULONG SaComputeSize32 ( VARTYPE vt,
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SAFEARRAY & saSrc,
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BYTE *pbBase,
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ULONG_PTR ulpOffset );
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//
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// Return information about a variant's base type
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//
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static void VartypeInfo32( VARTYPE vtype, USHORT& rcbWidth,
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USHORT& rcbAlign, USHORT& rgfFlags) {
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const VARNT_DATA& rvarInfo = _FindVarType32(vtype);
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rcbWidth = rvarInfo.width;
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rcbAlign = rvarInfo.alignment;
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rgfFlags = rvarInfo.flags;
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if (vtype & VT_VECTOR) {
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rgfFlags |= CntRef;
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}
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return;
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}
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#endif
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//
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// Initialize a variant from base parts
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//
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void Init( VARTYPE vt,
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BYTE* pbData = 0,
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ULONG cbData = 0);
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protected:
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enum { ulCoercionCodePage = CP_ACP };
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DBSTATUS _StoreString(BYTE * pbDstBuf,
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DBLENGTH cbDstBuf,
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VARTYPE vtDst,
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DBLENGTH & rcbDstLen,
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PVarAllocator & rPool) const;
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DBSTATUS _StoreDecimal(DECIMAL * pDecimal,
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LONG lElem = 0) const;
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DBSTATUS _StoreInteger(VARTYPE vtDst,
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BYTE * pbDstBuf,
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LONG lElem = 0) const;
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DBSTATUS _StoreIntegerUnSignedToSigned( VARTYPE vtDst,
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BYTE * pbDstBuf,
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LONG lElem = 0) const;
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DBSTATUS _StoreIntegerSignedToSigned( VARTYPE vtDst,
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BYTE * pbDstBuf,
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LONG lElem = 0) const;
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DBSTATUS _StoreIntegerUnSignedToUnSigned(VARTYPE vtDst,
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BYTE * pbDstBuf,
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LONG lElem = 0) const;
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DBSTATUS _StoreIntegerSignedToUnSigned( VARTYPE vtDst,
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BYTE * pbDstBuf,
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LONG lElem = 0) const;
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private:
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void SetDataSize (ULONG cbVarData);
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void ResetDataSize ();
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VOID * CopyData( PVarAllocator &rVarAllocator,
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USHORT cbDest,
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BYTE* pbBias = 0) const;
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static const USHORT _wInternalSig;
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inline BOOL _IsInternalVariant( void ) const;
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static inline const VARNT_DATA& _FindVarType( VARTYPE vt );
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#ifdef _WIN64
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static inline const VARNT_DATA& _FindVarType32( VARTYPE vt );
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#endif
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DBSTATUS _GetUL8Value(ULONGLONG * ul8Value, LONG lElem = 0L) const;
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DBSTATUS _GetL8Value(LONGLONG * l8Value, LONG lElem = 0L ) const;
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};
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const USHORT minExtVariantType = 128;
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#ifdef _WIN64
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//+-------------------------------------------------------------------------
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//
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// Method: CTableVariant::_FindVarType32, inline private
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//
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// Synopsis: Return a 32 bit description of a variant given its type
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//
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// Arguments: [vt] - the variant type to be looked up
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//
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// Returns: VARNT_DATA& - a reference to the variant type information
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//
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//--------------------------------------------------------------------------
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inline const CTableVariant::VARNT_DATA& CTableVariant::_FindVarType32(
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VARTYPE vtype
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) {
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USHORT vtBase = vtype & VT_TYPEMASK;
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if (vtBase < cVarntData)
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{
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return varntData32[vtBase];
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}
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else if (vtBase >= minExtVariantType &&
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vtBase < minExtVariantType + cVarntExtData)
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{
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return varntExtData32[ vtBase - minExtVariantType ];
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}
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else
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{
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return varntData32[0]; // return ref. to VT_EMPTY info
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}
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}
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#endif // _WIN64
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//+-------------------------------------------------------------------------
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//
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// Method: CTableVariant::_FindVarType, inline private
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//
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// Synopsis: Return a description of a variant given its type
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//
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// Arguments: [vt] - the variant type to be looked up
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//
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// Returns: VARNT_DATA& - a reference to the variant type information
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//
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//--------------------------------------------------------------------------
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inline const CTableVariant::VARNT_DATA& CTableVariant::_FindVarType(
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VARTYPE vtype
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) {
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USHORT vtBase = vtype & VT_TYPEMASK;
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if (vtBase < cVarntData)
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{
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return varntData[vtBase];
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}
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else if (vtBase >= minExtVariantType &&
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vtBase < minExtVariantType + cVarntExtData)
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{
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return varntExtData[ vtBase - minExtVariantType ];
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}
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else
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{
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return varntData[0]; // return ref. to VT_EMPTY info
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}
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}
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|
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//+-------------------------------------------------------------------------
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//
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// Method: CTableVariant::_IsInternalVariant, inline private
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//
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// Synopsis: Return whether the variant is an internal form with
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// pointers stored as offsets and variable data embedded.
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//
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// Arguments: -None-
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//
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// Returns: BOOL - TRUE if the variant is in internal form.
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//
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//--------------------------------------------------------------------------
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inline BOOL CTableVariant::_IsInternalVariant(
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void
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) const {
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return (wReserved1 == _wInternalSig &&
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wReserved3 == _wInternalSig &&
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VT_DECIMAL != vt);
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}
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|
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//+-------------------------------------------------------------------------
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//
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// Method: CTableVariant::SetDataSize, public
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//
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// Synopsis: Set variable data size for an internal variant
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//
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// Arguments: [cbVarData] - length of variable data associated with
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// the variant.
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//
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// Returns: -Nothing-
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//
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// Notes: For variants which are stored internally in the table,
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// the size is computed once and stored in the wReserved2
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// field of the variant structure.
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//
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//--------------------------------------------------------------------------
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|
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inline void CTableVariant::SetDataSize (ULONG cbVarData)
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{
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Win4Assert(cbVarData <= USHRT_MAX);
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if (vt != VT_DECIMAL) // this uses the reserved fields
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{
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wReserved2 = (USHORT)cbVarData;
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|
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//
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// Put a signature value in the variant to distinguish internal
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// vs. external variants.
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//
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wReserved1 = wReserved3 = _wInternalSig;
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}
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}
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|
|
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inline void CTableVariant::ResetDataSize ()
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{
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if (vt != VT_DECIMAL)
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wReserved1 = wReserved2 = wReserved3 = 0;
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}
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|
|
|
|
|
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//+-------------------------------------------------------------------------
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//
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// Member: CTableVariant::_StoreDecimal, private
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//
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// Synopsis: Copy variant integer data, coercing to VT_DECIMAL
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//
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// Arguments: [pDec] -- destination buffer
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// [lElem] -- element of vector to convert
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//
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// Returns: status for copy
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//
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// History: 25 Nov 1996 AlanW Created
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//
|
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//--------------------------------------------------------------------------
|
|
|
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inline DBSTATUS CTableVariant::_StoreDecimal( DECIMAL * pDec,
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LONG lElem ) const
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{
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ULONGLONG ul8Value = 0;
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|
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Win4Assert( (vt & VT_TYPEMASK) != VT_DECIMAL );
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|
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DBSTATUS DstStatus = _GetUL8Value (&ul8Value, lElem);
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if (DBSTATUS_S_OK == DstStatus)
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{
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pDec->scale = 0;
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pDec->sign = 0;
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pDec->Hi32 = 0;
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pDec->Lo64 = ul8Value;
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}
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else if ( DBSTATUS_E_CANTCONVERTVALUE == DstStatus )
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{
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LONGLONG l8Value;
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DstStatus = _GetL8Value (&l8Value, lElem);
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|
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if (DBSTATUS_S_OK == DstStatus)
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{
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pDec->scale = 0;
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pDec->Hi32 = 0;
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if ( l8Value < 0 )
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{
|
|
pDec->sign = DECIMAL_NEG;
|
|
pDec->Lo64 = -l8Value;
|
|
}
|
|
else
|
|
{
|
|
pDec->sign = 0;
|
|
pDec->Lo64 = l8Value;
|
|
}
|
|
}
|
|
}
|
|
|
|
return DstStatus;
|
|
} //_StoreDecimal
|
|
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CTableVariant::_StoreIntegerUnSignedToSigned, private
|
|
//
|
|
// Synopsis: Copy variant integer data, coerce if possible
|
|
//
|
|
// Arguments: [vtDst] -- type of the destination
|
|
// [pbDstBuf] -- destination buffer
|
|
// [lElem] -- element of vector to convert
|
|
//
|
|
// Returns: status for copy
|
|
//
|
|
// History: 24 Jul 1995 dlee Created
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_StoreIntegerUnSignedToSigned(
|
|
VARTYPE vtDst,
|
|
BYTE * pbDstBuf,
|
|
LONG lElem ) const
|
|
{
|
|
ULONGLONG ul8Value = 0;
|
|
DBSTATUS DstStatus = _GetUL8Value(&ul8Value, lElem);
|
|
|
|
// Store the ULONGLONG assuming alignment verified at accessor creation
|
|
if (DBSTATUS_S_OK == DstStatus)
|
|
{
|
|
switch ( vtDst )
|
|
{
|
|
case VT_I1 :
|
|
* (signed char *) pbDstBuf = (signed char) ul8Value;
|
|
if ( ul8Value > SCHAR_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I2 :
|
|
* (short *) pbDstBuf = (short) ul8Value;
|
|
if ( ul8Value > SHRT_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I4 :
|
|
case VT_INT :
|
|
* (long *) pbDstBuf = (long) ul8Value;
|
|
if ( ul8Value > LONG_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I8 :
|
|
* (LONGLONG *) pbDstBuf = (LONGLONG) ul8Value;
|
|
if ( ul8Value > _I64_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "US bad dst type %4x\n", vtDst ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return DstStatus;
|
|
} //_StoreIntegerUnSignedToSigned
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CTableVariant::_StoreIntegerUnSignedToUnSigned, private
|
|
//
|
|
// Synopsis: Copy variant integer data, coerce if possible
|
|
//
|
|
// Arguments: [vtDst] -- type of the destination
|
|
// [pbDstBuf] -- destination buffer
|
|
// [lElem] -- element of vector to convert
|
|
//
|
|
// Returns: status for copy
|
|
//
|
|
// History: 24 Jul 1995 dlee Created
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_StoreIntegerUnSignedToUnSigned(
|
|
VARTYPE vtDst,
|
|
BYTE * pbDstBuf,
|
|
LONG lElem ) const
|
|
{
|
|
ULONGLONG ul8Value;
|
|
DBSTATUS DstStatus = _GetUL8Value(&ul8Value, lElem);
|
|
|
|
// Store the ULONGLONG assuming alignment verified at accessor creation
|
|
if (DBSTATUS_S_OK == DstStatus)
|
|
{
|
|
switch ( vtDst )
|
|
{
|
|
case VT_UI1 :
|
|
* (unsigned char *) pbDstBuf = (char) ul8Value;
|
|
if ( ul8Value > UCHAR_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
|
|
case VT_UI2 :
|
|
* (unsigned short *) pbDstBuf = (unsigned short) ul8Value;
|
|
if ( ul8Value > USHRT_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
|
|
case VT_UI4 :
|
|
case VT_UINT :
|
|
* (unsigned long *) pbDstBuf = (unsigned long) ul8Value;
|
|
if ( ul8Value > ULONG_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
|
|
case VT_UI8 :
|
|
* (ULONGLONG *) pbDstBuf = ul8Value;
|
|
break;
|
|
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "UU bad dst type %4x\n", vtDst ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return DstStatus;
|
|
} //_StoreIntegerUnSignedToUnSigned
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CTableVariant::_StoreIntegerSignedToUnSigned, private
|
|
//
|
|
// Synopsis: Copy variant integer data, coerce if possible
|
|
//
|
|
// Arguments: [vtDst] -- type of the destination
|
|
// [pbDstBuf] -- destination buffer
|
|
// [lElem] -- element of vector to convert
|
|
//
|
|
// Returns: status for copy
|
|
//
|
|
// History: 24 Jul 1995 dlee Created
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_StoreIntegerSignedToUnSigned(
|
|
VARTYPE vtDst,
|
|
BYTE * pbDstBuf,
|
|
LONG lElem ) const
|
|
{
|
|
LONGLONG l8Value;
|
|
DBSTATUS DstStatus = _GetL8Value( &l8Value, lElem ) ;
|
|
|
|
// Store the LONGLONG assuming alignment verified at accessor creation
|
|
if (DBSTATUS_S_OK == DstStatus)
|
|
{
|
|
if ( l8Value < 0 )
|
|
DstStatus = DBSTATUS_E_SIGNMISMATCH;
|
|
else
|
|
{
|
|
switch ( vtDst )
|
|
{
|
|
case VT_UI1 :
|
|
* (unsigned char *) pbDstBuf = (unsigned char) l8Value;
|
|
if ( l8Value > UCHAR_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_UI2 :
|
|
* (unsigned short *) pbDstBuf = (unsigned short) l8Value;
|
|
if ( l8Value > USHRT_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_UI4 :
|
|
case VT_UINT :
|
|
* (unsigned long *) pbDstBuf = (unsigned long) l8Value;
|
|
if ( l8Value > ULONG_MAX )
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_UI8 :
|
|
* (ULONGLONG *) pbDstBuf = (ULONGLONG) l8Value;
|
|
break;
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "SU bad dst type %4x\n", vtDst ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return DstStatus;
|
|
} //_StoreIntegerSignedToUnSigned
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CTableVariant::_StoreIntegerSignedToSigned, private
|
|
//
|
|
// Synopsis: Copy variant integer data, coerce if possible
|
|
//
|
|
// Arguments: [vtDst] -- type of the destination
|
|
// [pbDstBuf] -- destination buffer
|
|
// [lElem] -- element of vector to convert
|
|
//
|
|
// Returns: status for copy
|
|
//
|
|
// History: 24 Jul 1995 dlee Created
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_StoreIntegerSignedToSigned(
|
|
VARTYPE vtDst,
|
|
BYTE * pbDstBuf,
|
|
LONG lElem ) const
|
|
{
|
|
LONGLONG l8Value = 0;
|
|
DBSTATUS DstStatus = _GetL8Value ( &l8Value, lElem );
|
|
|
|
|
|
// Store the ULONGLONG assuming alignment verified at accessor creation
|
|
if (DBSTATUS_S_OK == DstStatus)
|
|
{
|
|
switch ( vtDst )
|
|
{
|
|
case VT_I1 :
|
|
* (signed char *) pbDstBuf = (signed char) l8Value;
|
|
if (l8Value < SCHAR_MIN || l8Value > SCHAR_MAX)
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I2 :
|
|
* (short *) pbDstBuf = (short) l8Value;
|
|
if (l8Value < SHRT_MIN || l8Value > SHRT_MAX)
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I4 :
|
|
* (long *) pbDstBuf = (long) l8Value;
|
|
if (l8Value < LONG_MIN || l8Value > LONG_MAX)
|
|
DstStatus = DBSTATUS_E_DATAOVERFLOW;
|
|
break;
|
|
case VT_I8 :
|
|
* (LONGLONG *) pbDstBuf = l8Value;
|
|
break;
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "SS bad dst type %4x\n", vtDst ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return DstStatus;
|
|
} //_StoreIntegerSignedToSigned
|
|
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Member: CTableVariant::_StoreInteger, private
|
|
//
|
|
// Synopsis: Copy variant integer data, coerce if possible
|
|
//
|
|
// Arguments: [vtDst] -- type of the destination
|
|
// [pbDstBuf] -- destination buffer
|
|
// [lElem] -- element of vector to convert
|
|
//
|
|
// Returns: status for copy
|
|
//
|
|
// History: 24 Jul 1995 dlee Rewrote to support unsigned values
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline BOOL isSignedInteger( VARTYPE vt )
|
|
{
|
|
return ( VT_I1 == vt ||
|
|
VT_I2 == vt ||
|
|
VT_I4 == vt ||
|
|
VT_INT == vt ||
|
|
VT_I8 == vt ||
|
|
VT_BOOL == vt );
|
|
} //isSignedInteger
|
|
|
|
inline DBSTATUS CTableVariant::_StoreInteger(
|
|
VARTYPE vtDst,
|
|
BYTE * pbDstBuf,
|
|
LONG lElem ) const
|
|
{
|
|
// vt is the type of the source of the data
|
|
|
|
Win4Assert( vt == VT_I1 ||
|
|
vt == VT_UI1 ||
|
|
vt == VT_I2 ||
|
|
vt == VT_UI2 ||
|
|
vt == VT_I4 ||
|
|
vt == VT_UI4 ||
|
|
vt == VT_I8 ||
|
|
vt == VT_UI8 ||
|
|
vt == VT_INT ||
|
|
vt == VT_UINT ||
|
|
vt == VT_BOOL ||
|
|
vt == VT_ERROR ||
|
|
vt == VT_HRESULT ||
|
|
vt == VT_FILETIME ||
|
|
vt == VT_EMPTY || // empty if object is deleted
|
|
vt == (VT_I1 | VT_VECTOR) ||
|
|
vt == (VT_UI1 | VT_VECTOR) ||
|
|
vt == (VT_I2 | VT_VECTOR) ||
|
|
vt == (VT_UI2 | VT_VECTOR) ||
|
|
vt == (VT_I4 | VT_VECTOR) ||
|
|
vt == (VT_UI4 | VT_VECTOR) ||
|
|
vt == (VT_I8 | VT_VECTOR) ||
|
|
vt == (VT_UI8 | VT_VECTOR) ||
|
|
vt == (VT_BOOL | VT_VECTOR) ||
|
|
vt == (VT_ERROR | VT_VECTOR) ||
|
|
vt == (VT_FILETIME | VT_VECTOR));
|
|
|
|
BOOL fSrcSigned = isSignedInteger( vt & VT_TYPEMASK );
|
|
BOOL fDstSigned = isSignedInteger( vtDst );
|
|
|
|
if ( fSrcSigned && fDstSigned )
|
|
return _StoreIntegerSignedToSigned( vtDst, pbDstBuf, lElem );
|
|
else if ( fSrcSigned && !fDstSigned )
|
|
return _StoreIntegerSignedToUnSigned( vtDst, pbDstBuf, lElem );
|
|
else if ( !fSrcSigned && fDstSigned )
|
|
return _StoreIntegerUnSignedToSigned( vtDst, pbDstBuf, lElem );
|
|
else
|
|
return _StoreIntegerUnSignedToUnSigned( vtDst, pbDstBuf, lElem );
|
|
|
|
} //_StoreInteger
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Method: CTableVariant::_GetL8Value, private
|
|
//
|
|
// Synopsis: Converts the variant value to a LONGLONG
|
|
//
|
|
// Arguments: [*l8Value] - LONGLONG value on return
|
|
// [lElem] - for vector variants, the element whose value is
|
|
// to be converted
|
|
//
|
|
// Returns: DBSTATUS
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_GetL8Value(LONGLONG * l8Value, LONG lElem ) const
|
|
{
|
|
*l8Value = 0;
|
|
DBSTATUS DstStatus = DBSTATUS_S_OK;
|
|
|
|
Win4Assert((lElem == 0) || (vt & DBTYPE_VECTOR));
|
|
|
|
switch ( vt ) // type of the source
|
|
{
|
|
case VT_I1:
|
|
*l8Value = (CHAR)bVal;
|
|
break;
|
|
|
|
case VT_I2:
|
|
case VT_BOOL:
|
|
*l8Value = iVal;
|
|
break;
|
|
|
|
case VT_I4:
|
|
case VT_INT :
|
|
*l8Value = lVal;
|
|
break;
|
|
|
|
case VT_I8:
|
|
*l8Value = hVal.QuadPart;
|
|
break;
|
|
|
|
case VT_EMPTY:
|
|
case VT_NULL :
|
|
DstStatus = DBSTATUS_S_ISNULL;
|
|
break;
|
|
|
|
case VT_I1 | VT_VECTOR: // no i1 vector struct definition use UI1 and cast
|
|
*l8Value = (CHAR)caub.pElems[lElem];
|
|
break;
|
|
|
|
case VT_I2 | VT_VECTOR:
|
|
*l8Value = cai.pElems[lElem];
|
|
break;
|
|
|
|
case VT_I4 | VT_VECTOR:
|
|
*l8Value = cal.pElems[lElem];
|
|
break;
|
|
|
|
case VT_I8 | VT_VECTOR:
|
|
*l8Value = cah.pElems[lElem].QuadPart;
|
|
break;
|
|
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "_GetL8Value bad src type %4x\n", vt ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
return DstStatus;
|
|
}
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Method: CTableVariant::_GetUL8Value, private
|
|
//
|
|
// Synopsis: Converts the variant value to a ULONGLONG
|
|
//
|
|
// Arguments: [*ul8Value] - ULONGLONG value on return
|
|
// [lElem] - for vector variants, the element whose value is
|
|
// to be converted
|
|
//
|
|
// Returns: DBSTATUS
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
inline DBSTATUS CTableVariant::_GetUL8Value(ULONGLONG * ul8Value, LONG lElem ) const
|
|
{
|
|
*ul8Value = 0;
|
|
DBSTATUS DstStatus = DBSTATUS_S_OK;
|
|
|
|
Win4Assert((lElem == 0) || (vt & DBTYPE_VECTOR));
|
|
|
|
switch ( vt ) // type of the source
|
|
{
|
|
case VT_UI1:
|
|
*ul8Value = bVal;
|
|
break;
|
|
|
|
case VT_UI2:
|
|
*ul8Value = uiVal;
|
|
break;
|
|
|
|
case VT_UI4:
|
|
case VT_UINT :
|
|
case VT_ERROR :
|
|
case VT_HRESULT :
|
|
*ul8Value = ulVal;
|
|
break;
|
|
|
|
case VT_UI8:
|
|
case VT_FILETIME :
|
|
*ul8Value = uhVal.QuadPart;
|
|
break;
|
|
|
|
case VT_EMPTY:
|
|
case VT_NULL :
|
|
DstStatus = DBSTATUS_S_ISNULL;
|
|
break;
|
|
|
|
case VT_UI1 | VT_VECTOR:
|
|
*ul8Value = caub.pElems[lElem];
|
|
break;
|
|
|
|
case VT_UI2 | VT_VECTOR:
|
|
*ul8Value = caui.pElems[lElem];
|
|
break;
|
|
|
|
case VT_BOOL | VT_VECTOR :
|
|
*ul8Value = cabool.pElems[lElem];
|
|
break;
|
|
|
|
case VT_UI4 | VT_VECTOR:
|
|
*ul8Value = caul.pElems[lElem];
|
|
break;
|
|
|
|
case VT_ERROR | VT_VECTOR:
|
|
*ul8Value = cascode.pElems[lElem];
|
|
break;
|
|
|
|
case VT_UI8 | VT_VECTOR:
|
|
*ul8Value = cauh.pElems[lElem].QuadPart;
|
|
break;
|
|
|
|
case VT_FILETIME | VT_VECTOR:
|
|
*ul8Value = ((ULARGE_INTEGER *)(&cafiletime.pElems[lElem]))->QuadPart;
|
|
break;
|
|
|
|
default:
|
|
//tbDebugOut(( DEB_WARN, "_GetUL8Value bad src type %4x\n", vt ));
|
|
DstStatus = DBSTATUS_E_CANTCONVERTVALUE;
|
|
break;
|
|
}
|
|
return DstStatus;
|
|
|
|
}
|