.. _vtr_parse_config:

Parse Configuration
-------------------

A parse configuration file defines a set of values that will be searched for within the specified files.

Format
~~~~~~

The configuration file contains one line for each value to be searched for.
Each line contains a semicolon delimited tuple in the following format::

    <field_name>;<file_to_search_within>;<regex>;<default_value>

* ``<field_name>``: The name of the value to be searched for.

    This name is used when generating the output files of :ref:`parse_vtr_task` and :ref:`parse_vtr_flow`.

* ``<file_to_search_within>``: The name of the file that will be searched (vpr.out, odin.out, etc.)

* ``<regex>``: A perl regular expression used to find the desired value.

    The regex must contain a single grouping ``(`` ``)`` which will contain the desired value to be recorded.

* ``<default_value>``: The default value for the given ``<field_name>`` if the ``<regex>`` does not match.

    If no ``<default_value>`` is specified the value ``-1`` is used.

Or an include directive to import parsing patterns from a separate file::

    %include "<filepath>"

* ``<filepath>`` is a file containing additional parse specifications which will be included in the current file.

Comments can be specified with ``#``. Anything following a ``#`` is ignored.

Example File
~~~~~~~~~~~~

The following is an example parse configuration file:

.. code-block:: none

    vpr_status;output.txt;vpr_status=(.*)
    vpr_seconds;output.txt;vpr_seconds=(\d+)
    width;vpr.out;Best routing used a channel width factor of (\d+)
    pack_time;vpr.out;Packing took (.*) seconds
    place_time;vpr.out;Placement took (.*) seconds
    route_time;vpr.out;Routing took (.*) seconds
    num_pre_packed_nets;vpr.out;Total Nets: (\d+)
    num_pre_packed_blocks;vpr.out;Total Blocks: (\d+)
    num_post_packed_nets;vpr.out;Netlist num_nets:\s*(\d+)
    num_clb;vpr.out;Netlist clb blocks:\s*(\d+)
    num_io;vpr.out;Netlist inputs pins:\s*(\d+)
    num_outputs;vpr.out;Netlist output pins:\s*(\d+)
    num_lut0;vpr.out;(\d+) LUTs of size 0
    num_lut1;vpr.out;(\d+) LUTs of size 1
    num_lut2;vpr.out;(\d+) LUTs of size 2
    num_lut3;vpr.out;(\d+) LUTs of size 3
    num_lut4;vpr.out;(\d+) LUTs of size 4
    num_lut5;vpr.out;(\d+) LUTs of size 5
    num_lut6;vpr.out;(\d+) LUTs of size 6
    unabsorb_ff;vpr.out;(\d+) FFs in input netlist not absorbable
    num_memories;vpr.out;Netlist memory blocks:\s*(\d+)
    num_mult;vpr.out;Netlist mult_36 blocks:\s*(\d+)
    equiv;abc.out;Networks are (equivalent)
    error;output.txt;error=(.*)

    %include "my_other_metrics.txt"     #Include metrics from the file 'my_other_metrics.txt'