309 lines
7.8 KiB
C
309 lines
7.8 KiB
C
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/*++
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Copyright (C) 1996-2001 Microsoft Corporation
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Module Name:
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QL.H
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Abstract:
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Level 1 Syntax QL Parser
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Implements the syntax described in QL.BNF. This translates the input
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into an RPN stream of tokens.
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History:
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raymcc 21-Jun-96 Created.
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--*/
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#ifndef _QL__H_
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#define _QL__H_
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#include <wbemidl.h>
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#include <wbemint.h>
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#include <qllex.h>
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#include <corepol.h>
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#include <parmdefs.h>
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#include <stdio.h>
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#include <wmiutils.h>
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class CPropertyName : public WBEM_PROPERTY_NAME
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{
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protected:
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long m_lAllocated;
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void EnsureAllocated(long lElements);
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public:
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void Init();
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CPropertyName() {Init();}
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CPropertyName(const CPropertyName& Other);
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void operator=(const CPropertyName& Other);
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void operator=(const WBEM_PROPERTY_NAME& Other);
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BOOL operator==(const WBEM_PROPERTY_NAME& Other);
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void Empty();
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~CPropertyName() {Empty();}
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long GetNumElements() const {return m_lNumElements;}
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LPCWSTR GetStringAt(long lIndex) const;
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void AddElement(LPCWSTR wszElement);
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DELETE_ME LPWSTR GetText();
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};
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class CQl1ParseSink
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{
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public:
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virtual void SetClassName(LPCWSTR wszClass) = 0;
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virtual void SetTolerance(const WBEM_QL1_TOLERANCE& Tolerance) = 0;
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virtual void AddToken(const WBEM_QL1_TOKEN& Token) = 0;
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virtual void AddProperty(const CPropertyName& Property) = 0;
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virtual void AddAllProperties() = 0;
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virtual void SetAggregated() = 0;
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virtual void SetAggregationTolerance(const WBEM_QL1_TOLERANCE& Tolerance)= 0;
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virtual void AddAggregationProperty(const CPropertyName& Property) = 0;
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virtual void AddAllAggregationProperties() = 0;
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virtual void AddHavingToken(const WBEM_QL1_TOKEN& Token) = 0;
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virtual void InOrder(long lOp){}
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};
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class CAbstractQl1Parser
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{
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protected:
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// Controls keyword parsing in Next().
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// ===================================
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enum {
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NO_KEYWORDS = 0,
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ALL_KEYWORDS,
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EXCLUDE_GROUP_KEYWORD,
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EXCLUDE_EXPRESSION_KEYWORDS
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};
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CQl1ParseSink* m_pSink;
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CGenLexer *m_pLexer;
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int m_nLine;
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wchar_t* m_pTokenText;
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int m_nCurrentToken;
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// Semantic transfer variables.
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// ============================
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VARIANT m_vTypedConst;
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BOOL m_bQuoted;
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int m_nRelOp;
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DWORD m_dwConstFunction;
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DWORD m_dwPropFunction;
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CPropertyName m_PropertyName;
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BOOL m_bInAggregation;
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CPropertyName m_PropertyName2;
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BOOL m_bPropComp;
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// Parsing functions.
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// ==================
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virtual BOOL Next(int nFlags = ALL_KEYWORDS);
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LPCWSTR GetSinglePropertyName();
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void DeletePropertyName();
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int FlipOperator(int nOp);
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void AddAppropriateToken(const WBEM_QL1_TOKEN& Token);
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int parse_property_name(CPropertyName& Prop);
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int parse(int nFlags);
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int prop_list();
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int class_name();
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int tolerance();
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int opt_where();
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int expr();
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int property_name();
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int prop_list_2();
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int term();
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int expr2();
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int simple_expr();
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int term2();
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int leading_ident_expr();
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int finalize();
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int rel_operator();
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int equiv_operator();
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int comp_operator();
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int is_operator();
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int trailing_prop_expr();
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int trailing_prop_expr2();
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int trailing_or_null();
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int trailing_const_expr();
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int trailing_ident_expr();
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int unknown_func_expr();
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int typed_constant();
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int opt_aggregation();
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int aggregation_params();
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int aggregate_by();
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int aggregate_within();
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int opt_having();
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static DWORD TranslateIntrinsic(LPCWSTR pFuncName);
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static void InitToken(WBEM_QL1_TOKEN* pToken);
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public:
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enum {
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SUCCESS = 0,
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SYNTAX_ERROR,
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LEXICAL_ERROR,
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FAILED,
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BUFFER_TOO_SMALL
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};
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enum {
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FULL_PARSE = 0,
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NO_WHERE,
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JUST_WHERE
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};
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CAbstractQl1Parser(CGenLexSource *pSrc);
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virtual ~CAbstractQl1Parser();
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int Parse(CQl1ParseSink* pSink, int nFlags);
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int CurrentLine() { return m_nLine; }
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LPWSTR CurrentToken() { return m_pTokenText; }
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};
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struct QL_LEVEL_1_TOKEN
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{
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enum
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{
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OP_EXPRESSION = QL1_OP_EXPRESSION,
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TOKEN_AND = QL1_AND,
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TOKEN_OR = QL1_OR,
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TOKEN_NOT = QL1_NOT
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};
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enum
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{
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IFUNC_NONE = QL1_FUNCTION_NONE,
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IFUNC_UPPER = QL1_FUNCTION_UPPER,
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IFUNC_LOWER = QL1_FUNCTION_LOWER
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};
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// If the field is a OP_EXPRESSION, then the following are used.
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enum
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{
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OP_EQUAL = QL1_OPERATOR_EQUALS,
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OP_NOT_EQUAL = QL1_OPERATOR_NOTEQUALS,
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OP_EQUALorGREATERTHAN = QL1_OPERATOR_GREATEROREQUALS,
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OP_EQUALorLESSTHAN = QL1_OPERATOR_LESSOREQUALS,
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OP_LESSTHAN = QL1_OPERATOR_LESS,
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OP_GREATERTHAN = QL1_OPERATOR_GREATER,
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OP_LIKE = QL1_OPERATOR_LIKE
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};
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int nTokenType; // OP_EXPRESSION,TOKEN_AND, TOKEN_OR, TOKEN_NOT
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CPropertyName PropertyName;
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// Name of the property on which the operator is applied
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int nOperator; // Operator that is applied on property
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VARIANT vConstValue; // Value applied by operator
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BOOL bQuoted; // FALSE if the string should not have quotes around it.
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CPropertyName PropertyName2; // Property to compare, if applicable.
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BOOL m_bPropComp; // TRUE if this is a property-to-property compare.
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DWORD dwPropertyFunction; // 0=no instrinsic function applied
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DWORD dwConstFunction; // "
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QL_LEVEL_1_TOKEN();
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QL_LEVEL_1_TOKEN(const QL_LEVEL_1_TOKEN&);
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~QL_LEVEL_1_TOKEN();
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QL_LEVEL_1_TOKEN& operator=(const QL_LEVEL_1_TOKEN &Src);
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QL_LEVEL_1_TOKEN& operator=(const WBEM_QL1_TOKEN &Src);
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void Dump(FILE *);
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DELETE_ME LPWSTR GetText();
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};
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// Contains RPN version of expression.
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// ===================================
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struct QL_LEVEL_1_RPN_EXPRESSION : public CQl1ParseSink
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{
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int nNumTokens;
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int nCurSize;
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QL_LEVEL_1_TOKEN *pArrayOfTokens;
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BSTR bsClassName;
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WBEM_QL1_TOLERANCE Tolerance;
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int nNumberOfProperties; // Zero means all properties selected
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int nCurPropSize;
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BOOL bStar;
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CPropertyName *pRequestedPropertyNames;
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// Array of property names which values are to be returned if
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BOOL bAggregated;
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WBEM_QL1_TOLERANCE AggregationTolerance;
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BOOL bAggregateAll;
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int nNumAggregatedProperties;
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int nCurAggPropSize;
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CPropertyName *pAggregatedPropertyNames;
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int nNumHavingTokens;
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int nCurHavingSize;
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QL_LEVEL_1_TOKEN *pArrayOfHavingTokens;
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long lRefCount;
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QL_LEVEL_1_RPN_EXPRESSION();
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QL_LEVEL_1_RPN_EXPRESSION(const QL_LEVEL_1_RPN_EXPRESSION& Other);
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~QL_LEVEL_1_RPN_EXPRESSION();
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void AddRef();
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void Release();
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void SetClassName(LPCWSTR wszName);
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void SetTolerance(const WBEM_QL1_TOLERANCE& Tolerance);
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void AddToken(const WBEM_QL1_TOKEN& Tok);
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void AddToken(const QL_LEVEL_1_TOKEN& Tok);
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void AddProperty(const CPropertyName& Prop);
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void AddAllProperties();
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void SetAggregated();
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void SetAggregationTolerance(const WBEM_QL1_TOLERANCE& Tolerance);
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void AddAggregationProperty(const CPropertyName& Property);
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void AddAllAggregationProperties();
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void AddHavingToken(const WBEM_QL1_TOKEN& Tok);
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void Dump(const char *pszTextFile);
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DELETE_ME LPWSTR GetText();
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};
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class QL1_Parser : public CAbstractQl1Parser
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{
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QL_LEVEL_1_RPN_EXPRESSION* m_pExpression;
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BOOL m_bPartiallyParsed;
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public:
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QL1_Parser(CGenLexSource *pSrc);
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#undef ExportClass
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#define ExportClass SMSEXPORT
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~QL1_Parser();
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#undef ExportClass
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#define ExportClass SMSIMPORT
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int GetQueryClass(LPWSTR pBuf, int nBufSize);
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int Parse(QL_LEVEL_1_RPN_EXPRESSION **pOutput);
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HRESULT Parse(
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SWbemRpnEncodedQuery **pOutput
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);
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static LPWSTR ReplaceClassName(QL_LEVEL_1_RPN_EXPRESSION* pExpr,
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LPCWSTR wszClassName);
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};
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#endif
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