bcomps1

Usage

Overview

bcomps decomposes graphs into their biconnected components, printing the components to standard output.

Options

The following options are supported:

-s

No output graph is printed. Implies the -v flag.

-t

Print the underlying block-cutvertex tree.

-x

Each biconnected component is printed as a separate root graph.

-v

Prints number of blocks and cutvertices.

-o outfile

If specified, each root graph will be written to a different file with the names derived from outfile. In particular, if both -o and -x flags are used, then each block is written to a different file. If outfile does not have a suffix, the nth block of the ith graph is written to outfile_n_i. However, the 0th block of the 0th graph is written to outfile.

If outfile has a suffix, i.e., has the form base.sfx, then the files will have the same name as above, except appended with .sfx.

The block-cutvertex tree of ith graph is written to outfile_n_T, with an appended suffix if specified.

By default, each input graph is printed, with each block given as a subgraph whose name is a concatenation of the name of the input graph, the string "_bcc_" and the number of the block.

Operands

The following operand is supported:

files

Names of files containing 1 or more graphs in dot format. If no files operand is specified, the standard input will be used.

Return codes

bcomps returns 0 if all the input graphs are biconnected; and non-zero if any graph has multiple blocks, or any error occurred.