155 lines
3.6 KiB
C++
155 lines
3.6 KiB
C++
/*++
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// Copyright (c) 1999-2001 Microsoft Corporation, All Rights Reserved
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Module Name:
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SQL_1.H
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Abstract:
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Level 1 Syntax SQL Parser
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History:
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--*/
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#ifndef _SQL_1_H_
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#define _SQL_1_H_
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struct SQL_LEVEL_1_TOKEN
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{
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enum { OP_EXPRESSION = 1, TOKEN_AND, TOKEN_OR, TOKEN_NOT };
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enum { IFUNC_NONE = 0, IFUNC_UPPER = 1, IFUNC_LOWER = 2 };
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int nTokenType; // OP_EXPRESSION,TOKEN_AND, TOKEN_OR, TOKEN_NOT
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// If the field is a OP_EXPRESSION, then the following are used.
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enum { OP_EQUAL = 1, OP_NOT_EQUAL, OP_EQUALorGREATERTHAN,
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OP_EQUALorLESSTHAN, OP_LESSTHAN, OP_GREATERTHAN, OP_LIKE };
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BSTR pPropertyName; // 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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BOOL bConstIsStrNumeric; // True if the vConstValue is a BSTR and is a UINT32 or any 64bit number
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VARIANT vConstValue; // Value applied by operator
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BSTR pPropName2; // Property compared to.
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DWORD dwPropertyFunction; // 0=no instrinsic function applied
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DWORD dwConstFunction; // "
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SQL_LEVEL_1_TOKEN();
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SQL_LEVEL_1_TOKEN(SQL_LEVEL_1_TOKEN&);
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~SQL_LEVEL_1_TOKEN();
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SQL_LEVEL_1_TOKEN& operator=(SQL_LEVEL_1_TOKEN &Src);
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void Dump(FILE *);
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};
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// Contains RPN version of expression.
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// ===================================
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struct SQL_LEVEL_1_RPN_EXPRESSION
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{
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int nNumTokens;
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int nCurSize;
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SQL_LEVEL_1_TOKEN *pArrayOfTokens;
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BSTR bsClassName;
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int nNumberOfProperties; // Zero means all properties selected
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int nCurPropSize;
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BSTR *pbsRequestedPropertyNames; // Array of property names which values are to be returned if
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SQL_LEVEL_1_RPN_EXPRESSION();
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~SQL_LEVEL_1_RPN_EXPRESSION();
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//Note: this method deletes the token it is passed as an argument
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void AddToken(SQL_LEVEL_1_TOKEN *pTok);
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void AddToken(SQL_LEVEL_1_TOKEN &pTok);
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void AddProperty(LPWSTR pProp);
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void Dump(const char *pszTextFile);
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};
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class SQL1_Parser
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{
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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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SQL_LEVEL_1_RPN_EXPRESSION* m_pExpression;
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//Cleanup used by d'tor and SetSource
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void Cleanup();
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//Init used by c'tor and SetSource
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void Init(CGenLexSource *pSrc);
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// Semantic transfer variables.
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// ============================
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VARIANT m_vTypedConst;
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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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LPWSTR m_pIdent;
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LPWSTR m_pPropComp;
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BOOL m_bConstIsStrNumeric;
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// Parsing functions.
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// ==================
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BOOL Next();
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int parse();
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int prop_list();
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int class_name();
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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 unknown_func_expr();
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int typed_constant();
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public:
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enum {
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SUCCESS,
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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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SQL1_Parser(CGenLexSource *pSrc);
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~SQL1_Parser();
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int GetQueryClass(LPWSTR pBuf, int nBufSize);
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int Parse(SQL_LEVEL_1_RPN_EXPRESSION **pOutput);
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// use operator delete on pOutput
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int CurrentLine() { return m_nLine; }
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LPWSTR CurrentToken() { return m_pTokenText; }
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void SetSource(CGenLexSource *pSrc);
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};
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#endif
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