1 files changed, 116 insertions, 0 deletions
diff --git a/src/base/io/ioWriteGml.c b/src/base/io/ioWriteGml.c
new file mode 100644
index 00000000..ab9f1143
--- /dev/null
+++ b/src/base/io/ioWriteGml.c
@@ -0,0 +1,116 @@
+/**CFile****************************************************************
+
+  FileName    [ioWriteGml.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Command processing package.]
+
+  Synopsis    [Procedures to write the graph structure of AIG in GML.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: ioWriteGml.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "io.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Writes the graph structure of AIG in GML.]
+
+  Description [Useful for graph visualization using tools such as yEd: 
+  http://www.yworks.com/]
+  
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Io_WriteGml( Abc_Ntk_t * pNtk, char * pFileName )
+{
+    FILE * pFile;
+    Abc_Obj_t * pObj, * pFanin;
+    int i, k;
+
+    assert( Abc_NtkIsStrash(pNtk) || Abc_NtkIsLogic(pNtk)  );
+
+    // start the output stream
+    pFile = fopen( pFileName, "w" );
+    if ( pFile == NULL )
+    {
+        fprintf( stdout, "Io_WriteGml(): Cannot open the output file \"%s\".\n", pFileName );
+        return;
+    }
+    fprintf( pFile, "# GML for \"%s\" written by ABC on %s\n", pNtk->pName, Extra_TimeStamp() );
+    fprintf( pFile, "graph [\n" );
+
+    // output the POs
+    fprintf( pFile, "\n" );
+    Abc_NtkForEachPo( pNtk, pObj, i )
+    {
+        fprintf( pFile, "    node [ id %5d label \"%s\"\n", pObj->Id, Abc_ObjName(pObj) );
+        fprintf( pFile, "        graphics [ type \"triangle\" fill \"#00FFFF\" ]\n" );   // blue
+        fprintf( pFile, "    ]\n" );
+    }
+    // output the PIs
+    fprintf( pFile, "\n" );
+    Abc_NtkForEachPi( pNtk, pObj, i )
+    {
+        fprintf( pFile, "    node [ id %5d label \"%s\"\n", pObj->Id, Abc_ObjName(pObj) );
+        fprintf( pFile, "        graphics [ type \"triangle\" fill \"#00FF00\" ]\n" );   // green
+        fprintf( pFile, "    ]\n" );
+    }
+    // output the latches
+    fprintf( pFile, "\n" );
+    Abc_NtkForEachLatch( pNtk, pObj, i )
+    {
+        fprintf( pFile, "    node [ id %5d label \"%s\"\n", pObj->Id, Abc_ObjName(pObj) );
+        fprintf( pFile, "        graphics [ type \"rectangle\" fill \"#FF0000\" ]\n" );   // red
+        fprintf( pFile, "    ]\n" );
+    }
+    // output the nodes
+    fprintf( pFile, "\n" );
+    Abc_NtkForEachNode( pNtk, pObj, i )
+    {
+        fprintf( pFile, "    node [ id %5d label \"%s\"\n", pObj->Id, Abc_ObjName(pObj) );
+        fprintf( pFile, "        graphics [ type \"ellipse\" fill \"#CCCCFF\" ]\n" );     // grey
+        fprintf( pFile, "    ]\n" );
+    }
+
+    // output the edges
+    fprintf( pFile, "\n" );
+    Abc_NtkForEachObj( pNtk, pObj, i )
+    {
+        Abc_ObjForEachFanin( pObj, pFanin, k )
+        {
+            fprintf( pFile, "    edge [ source %5d   target %5d\n", pObj->Id, pFanin->Id );
+            fprintf( pFile, "        graphics [ type \"line\" arrow \"first\" ]\n" );
+            fprintf( pFile, "    ]\n" );
+        }
+    }
+
+    fprintf( pFile, "]\n" );
+    fprintf( pFile, "\n" );
+    fclose( pFile );
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+