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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V3.1//EN">
<!-- Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
<refentry id="fsainfo">
<refmeta>
<refentrytitle>fsainfo</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>fsainfo</refname>
<refpurpose>display information about finite state automata files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>fsainfo</command>
<arg>OPTIONS</arg>
<arg choice='plain'>fsa_file</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1><title>Description</title>
<para>
<command>fsainfo</command> displays information about fsa files,
mainly based on the fsa header. In addition,
<command>fsainfo</command> tries to load the fsa file and reports
whether loading succeeded. The following information is presented:
</para>
<para>
<variablelist>
<varlistentry>
<term>Header size</term>
<listitem>
<para>
Size of the fsa header (usually 256 bytes).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Magic</term>
<listitem>
<para>
Magic number identifying fsa files (2038637673). Files with wrong
magic will not be attempted to load.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Version</term>
<listitem>
<para>
Version of the fsa library used for building the fsa file (e.g. 1.0.2).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Serial number</term>
<listitem>
<para>
Serial number of the fsa file.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Checksum</term>
<listitem>
<para>
Checksum for verifying the integrity of the fsa file. If the checksum
verification fails, the fsa file will refuse to load.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>FSA size</term>
<listitem>
<para>
Size of the automaton (in number of cells and bytes).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Start state</term>
<listitem>
<para>
Index of the start state.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Data size</term>
<listitem>
<para>
Size of data storage used for storing meta information for final states.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Data item type</term>
<listitem>
<para>
Type of meta data items (fixed or variable size).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Fixed item size</term>
<listitem>
<para>
Size of meta data items, if fixed size.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Perfect hash</term>
<listitem>
<para>
Indication whether the fsa was built with perfect hash (yes/no).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Perfect hash size</term>
<listitem>
<para>
Perfect hash size, if the fsa was built with perfect hash.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Total size</term>
<listitem>
<para>
Full size of the fsa file (header + automaton + meta data + perfect hash).
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
<refsect2><title>Options</title>
<para>
<variablelist>
<varlistentry>
<term><option>-h</option></term>
<listitem>
<para>
display usage help
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-V</option></term>
<listitem>
<para>
display version number
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsect1>
<refsect1><title>See also</title>
<para>
makefsa, fsadump.
</para>
</refsect1>
<refsect1><title>Author</title>
<para>
Written by Peter Boros.
</para>
</refsect1>
</refentry>
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