LEMON Graph Format

Detailed Description

This group contains methods for reading and writing LEMON Graph Format.

Classes
class	DigraphReader< DGR >
	LGF reader for directed graphs More...
class	GraphReader< GR >
	LGF reader for undirected graphs More...
class	SectionReader
	Section reader class. More...
class	LgfContents
	Reader for the contents of the LGF file. More...
class	DigraphWriter< DGR >
	LGF writer for directed graphs More...
class	GraphWriter< GR >
	LGF writer for directed graphs More...
class	SectionWriter
	Section writer class. More...

Files
file	lgf_reader.h
	LEMON Graph Format reader.
file	lgf_writer.h
	LEMON Graph Format writer.

Functions
template<typename TDGR >
DigraphReader< TDGR >	digraphReader (TDGR &digraph, std::istream &is)
	Return a DigraphReader class.
template<typename TGR >
GraphReader< TGR >	graphReader (TGR &graph, std::istream &is)
	Return a GraphReader class.
SectionReader	sectionReader (std::istream &is)
	Return a SectionReader class.
template<typename TDGR >
DigraphWriter< TDGR >	digraphWriter (const TDGR &digraph, std::ostream &os)
	Return a DigraphWriter class.
template<typename TGR >
GraphWriter< TGR >	graphWriter (const TGR &graph, std::ostream &os)
	Return a GraphWriter class.
SectionWriter	sectionWriter (std::ostream &os)
	Return a SectionWriter class.

Function Documentation

DigraphReader< TDGR > digraphReader ( TDGR &  digraph, std::istream &  is  )

related

This function just returns a DigraphReader class.

With this function a digraph can be read from an LGF file or input stream with several maps and attributes. For example, there is network flow problem on a digraph, i.e. a digraph with a capacity map on the arcs and source and target nodes. This digraph can be read with the following code:

ListDigraph digraph;
ListDigraph::ArcMap<int> cm(digraph);
ListDigraph::Node src, trg;
digraphReader(digraph, std::cin).
  arcMap("capacity", cap).
  node("source", src).
  node("target", trg).
  run();

For a complete documentation, please see the DigraphReader class documentation.

Warning

Don't forget to put the run() to the end of the parameter list.

See Also

digraphReader(TDGR& digraph, const std::string& fn)

digraphReader(TDGR& digraph, const char* fn)

GraphReader< TGR > graphReader ( TGR &  graph, std::istream &  is  )

related

This function just returns a GraphReader class.

With this function a graph can be read from an LGF file or input stream with several maps and attributes. For example, there is weighted matching problem on a graph, i.e. a graph with a weight map on the edges. This graph can be read with the following code:

ListGraph graph;
ListGraph::EdgeMap<int> weight(graph);
graphReader(graph, std::cin).
  edgeMap("weight", weight).
  run();

For a complete documentation, please see the GraphReader class documentation.

Warning

Don't forget to put the run() to the end of the parameter list.

See Also

graphReader(TGR& graph, const std::string& fn)

graphReader(TGR& graph, const char* fn)

SectionReader sectionReader ( std::istream &  is )

related

This function just returns a SectionReader class.

Please see SectionReader documentation about the custom section input.

See Also

sectionReader(const std::string& fn)

sectionReader(const char *fn)

DigraphWriter< TDGR > digraphWriter ( const TDGR &  digraph, std::ostream &  os  )

related

This function just returns a DigraphWriter class.

With this function a digraph can be write to a file or output stream in LGF format with several maps and attributes. For example, with the following code a network flow problem can be written to the standard output, i.e. a digraph with a capacity map on the arcs and source and target nodes:

ListDigraph digraph;
ListDigraph::ArcMap<int> cap(digraph);
ListDigraph::Node src, trg;
  // Setting the capacity map and source and target nodes
digraphWriter(digraph, std::cout).
  arcMap("capacity", cap).
  node("source", src).
  node("target", trg).
  run();

For a complete documentation, please see the DigraphWriter class documentation.

Warning

Don't forget to put the run() to the end of the parameter list.

See Also

digraphWriter(const TDGR& digraph, const std::string& fn)

digraphWriter(const TDGR& digraph, const char* fn)

GraphWriter< TGR > graphWriter ( const TGR &  graph, std::ostream &  os  )

related

This function just returns a GraphWriter class.

With this function a graph can be write to a file or output stream in LGF format with several maps and attributes. For example, with the following code a weighted matching problem can be written to the standard output, i.e. a graph with a weight map on the edges:

ListGraph graph;
ListGraph::EdgeMap<int> weight(graph);
  // Setting the weight map
graphWriter(graph, std::cout).
  edgeMap("weight", weight).
  run();

For a complete documentation, please see the GraphWriter class documentation.

Warning

Don't forget to put the run() to the end of the parameter list.

See Also

graphWriter(const TGR& graph, const std::string& fn)

graphWriter(const TGR& graph, const char* fn)

SectionWriter sectionWriter ( std::ostream &  os )

related

This function just returns a SectionWriter class.

Please see SectionWriter documentation about the custom section output.

See Also

sectionWriter(const std::string& fn)

sectionWriter(const char *fn)