Dimacs Petgraph Parser

Basic parser to convert graphs in dimacs .col format to petgraphs with optional treewidth information. The treewidth information is in optional lines in arbirtary order in between the c and p lines in the dimacs.col file:

c ...
t TREEWIDTH_NUMBER
l TREEWIDTH_LOWER_BOUND_NUMBER
u TREEWIDTH_UPPER_BOUND_NUMBER
p ...

(see examples in test_graphs)

Usage / Example

Include this lib in your dependencies in your Cargo.toml:

dimacs_petgraph_parser = { git = "https://github.com/RaoulLuque/dimacs-petgraph-parser" }

Use the read_graph() function. This will return a result with an error if any IO errors occur or the graph is in the wrong format:

  let test_graph_one_file =
      File::open("test_graphs/test_graph_one.col").expect("Should be able to read file");
  let (test_graph_one, treewidth, lower_bound, upper_bound): 
        (Graph<i32, i32, petgraph::prelude::Undirected>,
        Option<usize>,
        Option<usize>,
        Option<usize>
        ) =
      read_graph(test_graph_one_file)
          .expect("Test Graph One should be readable/in correct format");