From a068ca78d71571e944848d43372188a2b2a3f78a Mon Sep 17 00:00:00 2001
From: Marc Zinnschlag <marc@zpages.de>
Date: Mon, 28 Jun 2010 00:50:48 +0200
Subject: [PATCH] replaced dummy parser with top level file parser

---
 apps/mwcompiler/main.cpp           |  2 +
 components/compiler/fileparser.cpp | 78 ++++++++++++++++++++++--------
 components/compiler/fileparser.hpp | 23 ++++++---
 3 files changed, 75 insertions(+), 28 deletions(-)

diff --git a/apps/mwcompiler/main.cpp b/apps/mwcompiler/main.cpp
index 03cc5a62cd..1143159302 100644
--- a/apps/mwcompiler/main.cpp
+++ b/apps/mwcompiler/main.cpp
@@ -21,6 +21,8 @@ int main (int argc, char **argv)
         Compiler::Scanner scanner (errorHandler, file);
         
         scanner.scan (parser);
+        
+        std::cout << "parsed script: " << parser.getName() << std::endl;
     }
     catch (const std::exception &e)
     {
diff --git a/components/compiler/fileparser.cpp b/components/compiler/fileparser.cpp
index 416854c1cf..388f8df03c 100644
--- a/components/compiler/fileparser.cpp
+++ b/components/compiler/fileparser.cpp
@@ -3,54 +3,90 @@
 #include <iostream>
 
 #include "tokenloc.hpp"
-
-
 #include "scanner.hpp"
 
 namespace Compiler
 {
     FileParser::FileParser (ErrorHandler& errorHandler, Context& context)
-    : Parser (errorHandler, context)
+    : Parser (errorHandler, context), mState (BeginState)
     {}
 
-    bool FileParser::parseInt (int value, const TokenLoc& loc, Scanner& scanner)
-    {
-        std::cout << "integer: " << value << std::endl;
-        return true;
-    }
-
-    bool FileParser::parseFloat (float value, const TokenLoc& loc, Scanner& scanner)
+    std::string FileParser::getName() const
     {
-        std::cout << "float: " << value << std::endl;
-        return true;
+        return mName;
     }
 
     bool FileParser::parseName (const std::string& name, const TokenLoc& loc,
         Scanner& scanner)
     {
-        std::cout << "name: " << name << std::endl;
-        return true;
+        if (mState==NameState)
+        {
+            mName = name;
+            mState = BeginCompleteState;
+            return true;
+        }
+        
+        if (mState==EndNameState)
+        {
+            // optional repeated name after end statement
+            if (mName!=name)
+                reportWarning ("Names for script " + mName + " do not match", loc);
+            
+            mState = EndCompleteState;
+            return true;
+        }
+        
+        return Parser::parseName (name, loc, scanner);
     }
 
     bool FileParser::parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner)
     {
-        std::cout << "keyword: " << loc.mLiteral << std::endl;
-        return true;
+        if (mState==BeginState && keyword==Scanner::K_begin)
+        {
+            mState = NameState;
+            return true;
+        }
+        
+        if (mState==EndState && keyword==Scanner::K_end)
+        {
+            mState = EndNameState;
+            return true;
+        }
+        
+        return Parser::parseKeyword (keyword, loc, scanner);
     }
 
     bool FileParser::parseSpecial (int code, const TokenLoc& loc, Scanner& scanner)
     {
         if (code==Scanner::S_newline)
-            std::cout << "newline" << std::endl;
-        else
-            std::cout << "special: " << loc.mLiteral << std::endl;
+        {
+            if (mState==BeginCompleteState)
+            {
+                // TODO: add script parser here
+                mState = EndState;
+                return true;
+            }
             
-        return true;
+            if (mState==EndCompleteState || mState==EndNameState)
+            {
+                // we are done here -> ignore the rest of the script
+                return false;
+            }
+        }
+        
+        return Parser::parseSpecial (code, loc, scanner);
     }
 
     void FileParser::parseEOF (Scanner& scanner)
     {
-        std::cout << "end of file" << std::endl;
+        if (mState!=EndNameState && mState!=EndCompleteState)
+            Parser::parseEOF (scanner);
+    }
+    
+    void FileParser::reset()
+    {
+        mState = BeginState;
+        mName.clear();
     }
 }
 
diff --git a/components/compiler/fileparser.hpp b/components/compiler/fileparser.hpp
index 2007c7ef2e..6ae0862166 100644
--- a/components/compiler/fileparser.hpp
+++ b/components/compiler/fileparser.hpp
@@ -5,19 +5,25 @@
 
 namespace Compiler
 {
+    // Top-level parser, to be used for global scripts, local scripts and targeted scripts
+    
     class FileParser : public Parser
     {
+            enum State
+            {
+                BeginState, NameState, BeginCompleteState, EndState, EndNameState,
+                EndCompleteState
+            };
+            
+            State mState;
+            std::string mName;
+            
         public:
         
             FileParser (ErrorHandler& errorHandler, Context& context);
 
-            virtual bool parseInt (int value, const TokenLoc& loc, Scanner& scanner);
-            ///< Handle an int token.
-            /// \return fetch another token?
-
-            virtual bool parseFloat (float value, const TokenLoc& loc, Scanner& scanner);
-            ///< Handle a double token.
-            /// \return fetch another token?
+            std::string getName() const;
+            ///< Return script name.
 
             virtual bool parseName (const std::string& name, const TokenLoc& loc,
                 Scanner& scanner);
@@ -34,6 +40,9 @@ namespace Compiler
 
             virtual void parseEOF (Scanner& scanner);
             ///< Handle EOF token.    
+            
+            void reset();
+            ///< Reset parser to clean state.
     };
 }