CqlParserHelpers.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / CqlParserHelpers.cs / 1 / CqlParserHelpers.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @owner [....] 
//--------------------------------------------------------------------- 

namespace System.Data.Common.EntitySql 
{
    using System;
    using System.IO;
    using System.Globalization; 

 
    ///  
    /// Represents the Cql Parser engine. Also, implements helpers and util routines.
    ///  
    internal sealed partial class CqlParser
    {
        private Expr _parsedTree;
        private CqlLexer _lexer; 
        private string _query;
        private ParserOptions _parserOptions = new ParserOptions(); 
        private const string _internalYaccSyntaxErrorMessage = "syntax error"; 
        private uint _methodCallNodeCount;
 
        private string _version = YYMAJOR.ToString(NumberFormatInfo.InvariantInfo) + '.' + YYMINOR.ToString(NumberFormatInfo.InvariantInfo);

        internal CqlParser( ParserOptions parserOptions, bool debug )
        { 
            _parserOptions = parserOptions;
            yydebug = debug; 
        } 

 
        /// 
        /// Main entry point for parsing cql.
        /// 
        /// cql query string 
        /// Thrown when Syntatic rules are violated and the query cannot be accepted
        /// Abstract Syntax Tree 
        internal Expr Parse( string query ) 
        {
            _query = query; 
            _parsedTree = null;
            _methodCallNodeCount = 0;
            _parserOptions = _parserOptions.MakeReadOnly();
            internalParseEntryPoint(); 
            return _parsedTree;
        } 
 

        ///  
        /// Returns query string
        /// 
        internal string Query
        { 
            get { return _query; }
        } 
 
#if EXTRA_ENTITYSQL_PARSER_DEBUGGING
        ///  
        /// Enables/Disables yacc debugging.
        /// 
        internal bool EnableDebug
        { 
            get { return yydebug; }
            set { yydebug = value; } 
        } 
#endif
 
        /// 
        /// Returns ParserOptions used
        /// 
        /// Once parse has been invoked, ParserOptions are frozen and cannot be changed. otherwise a EntityException exception will be thrown 
        internal ParserOptions ParserOptions
        { 
            get { return _parserOptions; } 
        }
 

        /// 
        /// Internal entry point
        ///  
        private void internalParseEntryPoint()
        { 
            _lexer = new CqlLexer(Query, ParserOptions); 
#if EXTRA_ENTITYSQL_PARSER_DEBUGGING
            CqlLexer.Token tk = lexer.yylex(); 
            while (null != tk)
            {
                Console.WriteLine("{0} := {1}", tk.TokenId, lexer.yytext());
                tk = lexer.yylex(); 
            }
#endif 
            yyparse(); 
        }
 

        //
        // Conversion/Cast/Helpers
        // 
        private static AstNode AstNode( object o ) { return ((AstNode)o); }
        private static int AstNodePos( object o ) { return ((AstNode)o).ErrCtx.InputPosition; } 
        private static CqlLexer.TerminalToken Terminal( object o ) { return ((CqlLexer.TerminalToken)o); } 
        private static int TerminalPos( object o ) { return ((CqlLexer.TerminalToken)o).IPos; }
        private static ExprList ToExprList( object o ) { return ((ExprList)o); } 


        private short yylex()
        { 
            CqlLexer.Token token = null;
            token = _lexer.yylex(); 
            if (null == token) 
            {
                return 0; 
            }
            _lexer.AdvanceIPos();
            yylval = token.Value;
            return token.TokenId; 
        }
 
 
        private void yyerror_stackoverflow()
        { 
            yyerror(System.Data.Entity.Strings.StackOverflowInParser);
        }

 
        private void yyerror( string s )
        { 
            if (s.Equals(_internalYaccSyntaxErrorMessage, StringComparison.Ordinal)) 
            {
                int errorPosition = _lexer.IPos; 
                string syntaxContextInfo = null;
                string term = _lexer.YYText;
                if (!String.IsNullOrEmpty(term))
                { 
                    syntaxContextInfo = System.Data.Entity.Strings.LocalizedTerm;
                    ErrorContext errCtx = null; 
                    AstNode astNode = yylval as AstNode; 
                    if (null != astNode && (null != astNode.ErrCtx) && (!String.IsNullOrEmpty(astNode.ErrCtx.ErrorContextInfo)))
                    { 
                        errCtx = astNode.ErrCtx;
                        errorPosition = Math.Min(errorPosition, errorPosition - term.Length);
                    }
 
                    if ((yylval is CqlLexer.TerminalToken) && CqlLexer.IsReservedKeyword(term) && !(astNode is Identifier))
                    { 
                        syntaxContextInfo = System.Data.Entity.Strings.LocalizedKeyword; 
                        term = term.ToUpperInvariant();
                        errorPosition = Math.Min(errorPosition, errorPosition - term.Length); 
                    }
                    else if (null != errCtx)
                    {
                        syntaxContextInfo = EntityRes.GetString(errCtx.ErrorContextInfo); 
                    }
 
                    syntaxContextInfo = String.Format(CultureInfo.CurrentCulture, "{0} '{1}'", syntaxContextInfo, term); 
                }
 
                throw EntityUtil.EntitySqlError(_query,
                                     System.Data.Entity.Strings.GenericSyntaxError,
                                     errorPosition,
                                     syntaxContextInfo, 
                                     false /* loadErrorContextInfoFromResource */);
            } 
            throw EntityUtil.EntitySqlError(_query, s, _lexer.IPos); 
        }
 
        //
        // Error tracking helpers
        //
        private void SetErrCtx( AstNode astExpr, CqlLexer.TerminalToken tokenValue, string info ) 
        {
            SetErrCtx(astExpr, tokenValue.IPos, info); 
        } 

        private void SetErrCtx( AstNode astExpr, int inputPos, string info ) 
        {
            astExpr.ErrCtx.InputPosition = inputPos;
            astExpr.ErrCtx.ErrorContextInfo = info;
            astExpr.ErrCtx.QueryText = _query; 
        }
 
        private void ResetMethodCallCount() 
        {
            _methodCallNodeCount = 0; 
        }

        private void IncrementMethodCallCount()
        { 
            unchecked { _methodCallNodeCount++; }
        } 
 
        private uint MethodCallCount
        { 
            get { return _methodCallNodeCount; }
        }
    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @owner [....] 
//--------------------------------------------------------------------- 

namespace System.Data.Common.EntitySql 
{
    using System;
    using System.IO;
    using System.Globalization; 

 
    ///  
    /// Represents the Cql Parser engine. Also, implements helpers and util routines.
    ///  
    internal sealed partial class CqlParser
    {
        private Expr _parsedTree;
        private CqlLexer _lexer; 
        private string _query;
        private ParserOptions _parserOptions = new ParserOptions(); 
        private const string _internalYaccSyntaxErrorMessage = "syntax error"; 
        private uint _methodCallNodeCount;
 
        private string _version = YYMAJOR.ToString(NumberFormatInfo.InvariantInfo) + '.' + YYMINOR.ToString(NumberFormatInfo.InvariantInfo);

        internal CqlParser( ParserOptions parserOptions, bool debug )
        { 
            _parserOptions = parserOptions;
            yydebug = debug; 
        } 

 
        /// 
        /// Main entry point for parsing cql.
        /// 
        /// cql query string 
        /// Thrown when Syntatic rules are violated and the query cannot be accepted
        /// Abstract Syntax Tree 
        internal Expr Parse( string query ) 
        {
            _query = query; 
            _parsedTree = null;
            _methodCallNodeCount = 0;
            _parserOptions = _parserOptions.MakeReadOnly();
            internalParseEntryPoint(); 
            return _parsedTree;
        } 
 

        ///  
        /// Returns query string
        /// 
        internal string Query
        { 
            get { return _query; }
        } 
 
#if EXTRA_ENTITYSQL_PARSER_DEBUGGING
        ///  
        /// Enables/Disables yacc debugging.
        /// 
        internal bool EnableDebug
        { 
            get { return yydebug; }
            set { yydebug = value; } 
        } 
#endif
 
        /// 
        /// Returns ParserOptions used
        /// 
        /// Once parse has been invoked, ParserOptions are frozen and cannot be changed. otherwise a EntityException exception will be thrown 
        internal ParserOptions ParserOptions
        { 
            get { return _parserOptions; } 
        }
 

        /// 
        /// Internal entry point
        ///  
        private void internalParseEntryPoint()
        { 
            _lexer = new CqlLexer(Query, ParserOptions); 
#if EXTRA_ENTITYSQL_PARSER_DEBUGGING
            CqlLexer.Token tk = lexer.yylex(); 
            while (null != tk)
            {
                Console.WriteLine("{0} := {1}", tk.TokenId, lexer.yytext());
                tk = lexer.yylex(); 
            }
#endif 
            yyparse(); 
        }
 

        //
        // Conversion/Cast/Helpers
        // 
        private static AstNode AstNode( object o ) { return ((AstNode)o); }
        private static int AstNodePos( object o ) { return ((AstNode)o).ErrCtx.InputPosition; } 
        private static CqlLexer.TerminalToken Terminal( object o ) { return ((CqlLexer.TerminalToken)o); } 
        private static int TerminalPos( object o ) { return ((CqlLexer.TerminalToken)o).IPos; }
        private static ExprList ToExprList( object o ) { return ((ExprList)o); } 


        private short yylex()
        { 
            CqlLexer.Token token = null;
            token = _lexer.yylex(); 
            if (null == token) 
            {
                return 0; 
            }
            _lexer.AdvanceIPos();
            yylval = token.Value;
            return token.TokenId; 
        }
 
 
        private void yyerror_stackoverflow()
        { 
            yyerror(System.Data.Entity.Strings.StackOverflowInParser);
        }

 
        private void yyerror( string s )
        { 
            if (s.Equals(_internalYaccSyntaxErrorMessage, StringComparison.Ordinal)) 
            {
                int errorPosition = _lexer.IPos; 
                string syntaxContextInfo = null;
                string term = _lexer.YYText;
                if (!String.IsNullOrEmpty(term))
                { 
                    syntaxContextInfo = System.Data.Entity.Strings.LocalizedTerm;
                    ErrorContext errCtx = null; 
                    AstNode astNode = yylval as AstNode; 
                    if (null != astNode && (null != astNode.ErrCtx) && (!String.IsNullOrEmpty(astNode.ErrCtx.ErrorContextInfo)))
                    { 
                        errCtx = astNode.ErrCtx;
                        errorPosition = Math.Min(errorPosition, errorPosition - term.Length);
                    }
 
                    if ((yylval is CqlLexer.TerminalToken) && CqlLexer.IsReservedKeyword(term) && !(astNode is Identifier))
                    { 
                        syntaxContextInfo = System.Data.Entity.Strings.LocalizedKeyword; 
                        term = term.ToUpperInvariant();
                        errorPosition = Math.Min(errorPosition, errorPosition - term.Length); 
                    }
                    else if (null != errCtx)
                    {
                        syntaxContextInfo = EntityRes.GetString(errCtx.ErrorContextInfo); 
                    }
 
                    syntaxContextInfo = String.Format(CultureInfo.CurrentCulture, "{0} '{1}'", syntaxContextInfo, term); 
                }
 
                throw EntityUtil.EntitySqlError(_query,
                                     System.Data.Entity.Strings.GenericSyntaxError,
                                     errorPosition,
                                     syntaxContextInfo, 
                                     false /* loadErrorContextInfoFromResource */);
            } 
            throw EntityUtil.EntitySqlError(_query, s, _lexer.IPos); 
        }
 
        //
        // Error tracking helpers
        //
        private void SetErrCtx( AstNode astExpr, CqlLexer.TerminalToken tokenValue, string info ) 
        {
            SetErrCtx(astExpr, tokenValue.IPos, info); 
        } 

        private void SetErrCtx( AstNode astExpr, int inputPos, string info ) 
        {
            astExpr.ErrCtx.InputPosition = inputPos;
            astExpr.ErrCtx.ErrorContextInfo = info;
            astExpr.ErrCtx.QueryText = _query; 
        }
 
        private void ResetMethodCallCount() 
        {
            _methodCallNodeCount = 0; 
        }

        private void IncrementMethodCallCount()
        { 
            unchecked { _methodCallNodeCount++; }
        } 
 
        private uint MethodCallCount
        { 
            get { return _methodCallNodeCount; }
        }
    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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CqlParserHelpers.cs source code in C# .NET

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