Changeset 1284:b941d044f87b in lemon-0.x

Timestamp:

03/31/05 16:04:13 (20 years ago)

Author:

Alpar Juttner

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1716

Message:

SmartGraph? can also split() a node!

Location:

src/lemon

Files:

• list_graph.h (modified) (2 diffs)
• smart_graph.h (modified) (2 diffs)

src/lemon/list_graph.h

@@ -393 +393 @@
     ///Split a node.
 
-    ///This function splits a node. First new node is added to the graph, then
-    ///the source of each outgoing edge of \c n is moved to this new node.
+    ///This function splits a node. First a new node is added to the graph,
+    ///then the source of each outgoing edge of \c n is moved to this new node.
     ///If \c connect is \c true (this is the default value), then a new edge
     ///from \c n to the newly created node is also added.
@@ -403 +403 @@
     ///valid. However <tt>InEdge</tt>'s and <tt>OutEdge</tt>'s
     ///may be invalidated.
+    ///\warning This functionality cannot be used together with the SnapShot
+    ///feature.
     ///\todo It could be implemented in a bit faster way.
     Node split(Node n, bool connect = true) 

src/lemon/smart_graph.h

@@ -220 +220 @@
     }
 
+    Node _split(Node n, bool connect = true)
+    {
+      Node b = addNode();
+      nodes[b.n].first_out=nodes[n.n].first_out;
+      nodes[n.n].first_out=-1;
+      for(int i=nodes[b.n].first_out;i!=-1;i++) edges[i].source=b.n;
+      if(connect) addEdge(n,b);
+      return b;
+    }
+
   };
 
@@ -285 +295 @@
 
   public:
+
+    ///Split a node.
+    
+    ///This function splits a node. First a new node is added to the graph,
+    ///then the source of each outgoing edge of \c n is moved to this new node.
+    ///If \c connect is \c true (this is the default value), then a new edge
+    ///from \c n to the newly created node is also added.
+    ///\return The newly created node.
+    ///
+    ///\note The <tt>Edge</tt>s
+    ///referencing a moved edge remain
+    ///valid. However <tt>InEdge</tt>'s and <tt>OutEdge</tt>'s
+    ///may be invalidated.
+    ///\warning This functionality cannot be used together with the SnapShot
+    ///feature.
+    ///\todo It could be implemented in a bit faster way.
+    Node split(Node n, bool connect = true) 
+    {
+      return _split(n,connect);
+    }
+  
+
     ///Class to make a snapshot of the graph and to restrore to it later.