Improving tnl-view to skip already processed files.

src/core/tnlFile.h

@@ -19,6 +19,7 @@
 #define TNLFILE_H_
 
 #include <iostream>
+#include <fstream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <tnlConfig.h>
@@ -331,5 +332,15 @@ bool tnlFile ::  write( const Type* buffer,
    return true;
 };
 
+inline bool fileExists( const tnlString& fileName )
+{
+  fstream file;
+  file.open( fileName. getString(), ios::in );
+  bool result( true );
+  if( ! file )
+     result = false;
+  file.close();
+  return result;
+};
 
 #endif /* TNLFILE_H_ */

tools/share/tnl-view.cfg.desc

@@ -3,6 +3,7 @@ group IO
    string mesh( "" )               [Mesh file. If none is given, a regular rectangular mesh is assumed.];
    list of string input-files(!)   [Input files.];
    list of string output-files     [Output files.];
+   bool check-output-file(false)   [If the output file already exists, do not recreate it.];
    list of real level-lines        [List of level sets which will be drawn.];
    integer output-x-size           [X size of the output.];
    integer output-y-size           [Y size of the output.];

tools/src/tnl-view.h

@@ -35,6 +35,7 @@ bool convertObject( const Mesh& mesh,
                     const tnlParameterContainer& parameters )
 {
    int verbose = parameters. GetParameter< int >( "verbose");
+   bool checkOutputFile = parameters. GetParameter< bool >( "check-output-file" );
    tnlString outputFileName( inputFileName );
    RemoveFileExtension( outputFileName );
    tnlString outputFormat = parameters. GetParameter< tnlString >( "output-format" );
@@ -45,6 +46,12 @@ bool convertObject( const Mesh& mesh,
       cerr << "Unknown file format " << outputFormat << ".";
       return false;
    }
+   if( checkOutputFile && fileExists( outputFileName ) )
+   {
+      if( verbose )
+         cout << " file already exists. Skipping.            \r" << flush;
+      return true;
+   }
    if( verbose )
       cout << " writing to " << outputFileName << " ... " << flush;
 
@@ -156,6 +163,7 @@ bool processFiles( const tnlParameterContainer& parameters )
 {
    int verbose = parameters. GetParameter< int >( "verbose");
    tnlString meshFile = parameters. GetParameter< tnlString >( "mesh" );
+
    Mesh mesh;
    if( meshFile != "" )
       if( ! mesh. load( meshFile ) )