Perform decent error checking when getting music file, previous code would silently return an empty file. Fixed the use of the 'smart' function used too early when loading title music

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@6252 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/audio/music_information.cpp

@@ -45,6 +45,8 @@ MusicInformation::MusicInformation(const std::string& filename) throw (std::runt
     m_gain            = 1.0f;
     m_adjusted_gain   = 1.0f;
 
+    assert(filename.size() > 0);
+    
     if (StringUtils::getExtension(filename) != "music")
     {
         // Create information just from ogg file
@@ -111,6 +113,8 @@ MusicInformation::MusicInformation(const std::string& filename) throw (std::runt
         m_fast_filename = path + "/" + m_fast_filename;
     }
     
+    assert(m_normal_filename.size() > 0);
+
 }   // MusicInformation
 
 //-----------------------------------------------------------------------------

src/config/stk_config.cpp

@@ -231,8 +231,16 @@ void STKConfig::getAllData(const XMLNode * root)
     {
         std::string title_music;
         music_node->get("title", &title_music);
-        m_title_music = new MusicInformation(
-                                     file_manager->getMusicFile(title_music) );
+        assert(title_music.size() > 0);
+        
+        try
+        {
+            m_title_music = new MusicInformation(file_manager->getDataDir() + "/music/" + title_music);
+        }
+        catch (std::runtime_error& e)
+        {
+            fprintf(stderr, "Cannot load title music : %s\n", e.what());
+        }
     }
 
     if(const XMLNode *history_node = root->getNode("history"))

src/io/file_manager.cpp

@@ -571,7 +571,11 @@ std::string FileManager::getLogFile(const std::string& fname) const
 std::string FileManager::getMusicFile(const std::string& fname) const
 {
     std::string path;
-    findFile(path, fname, m_music_search_path);
+    const bool success = findFile(path, fname, m_music_search_path);
+    if (!success)
+    {
+        throw std::runtime_error("[FileManager::getMusicFile] Cannot find music file <" + fname + ">");
+    }
     return path;
 }   // getMusicFile