Changeset 7963 for code/branches/usability/src/libraries/core/Loader.cc

Timestamp:

Feb 26, 2011, 6:44:25 AM (14 years ago)

Author:

rgrieder

Message:

Added "replaceLuaTags" function to the Loader. That allows to load files without parsing it as Lua file.
Bottom line:

• Compiling the level list is about 30 times faster and takes less than half a second now
• We need to write level files that are XML-valid even if all the Lua stuff is removed. (or: somebody find a better implementation for speeding up that LevelInfo loading)

File:

• code/branches/usability/src/libraries/core/Loader.cc (modified) (6 diffs)

code/branches/usability/src/libraries/core/Loader.cc

@@ -147 +147 @@
         Returns true if successful.
     */
-    bool Loader::load(const XMLFile* file, const ClassTreeMask& mask, bool verbose)
+    bool Loader::load(const XMLFile* file, const ClassTreeMask& mask, bool verbose, bool bRemoveLuaTags)
     {
         if (!file)
@@ -155 +155 @@
 
         std::string xmlInput;
-        if (file->getLuaSupport())
+        if (file->getLuaSupport() && !bRemoveLuaTags)
         {
             // Use the LuaState to replace the XML tags (calls our function)
@@ -172 +172 @@
             }
             xmlInput = Resource::open(file->getFilename())->getAsString();
+
+            if (bRemoveLuaTags)
+            {
+                // Remove all Lua code.
+                // Note: we only need this to speed up parsing of level files at the
+                // start of the program.
+                // Assumption: the LevelInfo tag does not use Lua scripting
+                xmlInput = removeLuaTags(xmlInput);
+            }
         }
 
@@ -271 +280 @@
     }
 
-    std::string Loader::replaceLuaTags(const std::string& text)
-    {
-        // create map with all Lua tags
-        std::map<size_t, bool> luaTags;
+    bool Loader::getLuaTags(const std::string& text, std::map<size_t, bool>& luaTags)
+    {
+        // fill map with all Lua tags
         {
             size_t pos = 0;
@@ -328 +336 @@
             {
                 COUT(2) << "Warning: Error in level file" << std::endl;
-                // todo: errorhandling
-                return "";
-            }
-        }
+                // TODO: error handling
+                return false; 
+            }
+        }
+
+        return true;
+    }
+
+    std::string Loader::replaceLuaTags(const std::string& text)
+    {
+        // create a map with all lua tags
+        std::map<size_t, bool> luaTags;
+        if (!getLuaTags(text, luaTags))
+            return "";
 
         // Use a stringstream object to speed up the parsing
@@ -421 +439 @@
         return output.str();
     }
+
+    std::string Loader::removeLuaTags(const std::string& text)
+    {
+        // create a map with all lua tags
+        std::map<size_t, bool> luaTags;
+        if (!getLuaTags(text, luaTags))
+            return "";
+
+        // Use a stringstream object to speed up the concatenation
+        std::ostringstream output;
+
+        // cut the original string into pieces and only write the non Lua parts
+        std::map<size_t, bool>::iterator it = luaTags.begin();
+        bool bLuaCode = false;
+        size_t start = 0;
+        size_t end = 0;
+
+        do
+        {
+            if (it != luaTags.end())
+                end = (it++)->first;
+            else
+                end = std::string::npos;
+
+            if (!bLuaCode)
+            {
+                output << text.substr(start, end - start);
+                start = end + 5;
+            }
+            else
+                start = end + 2;
+
+            bLuaCode = !bLuaCode;
+        }
+        while (end != std::string::npos);
+
+        return output.str();
+    }
 }