From 8f27e65bddd7d4b8515ce620fb485fdd78fcdf89 Mon Sep 17 00:00:00 2001
From: Constantin Jucovschi <cj@ubuntu.localdomain>
Date: Fri, 24 Apr 2009 07:20:22 -0400
Subject: Initial commit

---
 qlparser/symtab.hh | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 qlparser/symtab.hh

(limited to 'qlparser/symtab.hh')

diff --git a/qlparser/symtab.hh b/qlparser/symtab.hh
new file mode 100644
index 0000000..c3e5fba
--- /dev/null
+++ b/qlparser/symtab.hh
@@ -0,0 +1,110 @@
+#ifndef _SYMTAB_HH_
+#define _SYMTAB_HH_
+
+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/*************************************************************************
+ *
+ *
+ * PURPOSE:
+ *   store symbols (identifiers) during the parse process
+ *
+ *
+ * COMMENTS:
+ *   none
+ *
+ ***********************************************************************/
+
+#include <iostream>
+#include <vector>
+#include <map>
+#include <string>
+#include "raslib/rmdebug.hh"
+
+//@ManMemo: Module: {\bf qlparser}
+
+/*@Doc:                                                                                                                               
+
+  This class represents a generic symbol table. The operations on
+  symbols in the symbol table are: putSymbol, getSymbol, lookupSymbol.
+  The operations on scopes are: initScope, exitScope, outScope, clearScope,
+  wipe. 
+
+*/
+
+template <class T>
+class SymbolTable {
+public:
+  /// This vector stores keys available in the map.
+  std::vector<std::string > keys;                    
+  /// This is an iterator for the vector storing the keys available in the map.
+  std::vector<std::string >::iterator keyIterator;  
+
+  /// default constructor creates an empty symbol table, calls initScope(), clears local symbols. 
+  SymbolTable();
+
+  /// default destructor, calls exitScope().
+ ~SymbolTable();
+
+  //@Man: Methods for symbol manipulation
+  //@{
+  /// Puts value at position symbol in the table. Returns true if it succeeded, otherwise false.
+  bool    putSymbol( const std::string& symbol, T value ); 
+  /// Get value at position symbol from the table. If symbol doesn't exist, it returns NULL.
+  T       getSymbol( const std::string& symbol );
+  /// Returns true if symbol is in table.
+  bool lookupSymbol( const std::string& symbol );
+  //@}
+
+  //@Man: Methods for scope manipulation
+  //@{
+  /// Enter new scope.
+  void  initScope();                                
+  /// Exit current scope.
+  void  exitScope();                                
+  /// Output current scope to RMInit::logOut.
+  void   outScope();                               
+  /// Init scope by clearing inner symbols.
+  void clearScope();                                
+  /// Clear all symbols in all scopes.
+  void       wipe();
+  //@}
+
+private:
+  /// Store symbol in map.
+  void storeSymbol( const std::string& symbol, T value ); // put only in the hash_map
+
+  /// Stores local variables.
+         std::map<std::string , T>   STVars;	
+
+  /// Stores scopes.
+  std::vector<std::map<std::string , T> > STScopes;
+};
+
+#ifdef EARLY_TEMPLATE
+#ifdef __EXECUTABLE__
+#include "symtab.cc"
+#endif
+#endif
+
+#endif
-- 
cgit