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f9c2362e43
Allow passing --identifier-prefix and --symbol-prefix to glib-mkenums, with the same meanings as in g-ir-scanner, to allow fixing up the enum name parsing globally rather than needing to add a /<* *>/ override to each enum. https://bugzilla.gnome.org/show_bug.cgi?id=661797
321 lines
9.5 KiB
XML
321 lines
9.5 KiB
XML
<refentry id="glib-mkenums" lang="en">
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<refmeta>
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<refentrytitle>glib-mkenums</refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo class="manual">User Commands</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>glib-mkenums</refname>
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<refpurpose>C language enum description generation utility</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>glib-mkenums</command>
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<arg choice="opt" rep="repeat">options</arg>
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<arg choice="opt" rep="repeat">files</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para><command>glib-mkenums</command> is a small perl-script utility that parses C
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code to extract enum definitions and produces enum descriptions based on text
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templates specified by the user. Most frequently this script is used to
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produce C code that contains enum values as strings so programs can provide
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value name strings for introspection.
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</para>
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</refsect1>
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<refsect1><title>Invocation</title>
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<para><command>glib-mkenums</command> takes a list of valid C code files as
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input. The options specified control the text that is output, certain
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substitutions are performed on the text templates for keywords enclosed
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in @ characters.
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</para>
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<refsect2><title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>--fhead</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> prior to processing input files.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--fprod</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> everytime a new input file
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is being processed.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--ftail</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> after all input files have been
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processed.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--eprod</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> everytime an enum is encountered
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in the input files.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--vhead</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> before iterating over the set of
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values of an enum.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--vprod</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> for every value of an enum.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--vtail</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Put out <replaceable>text</replaceable> after iterating over all values
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of an enum.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--comments</option> <replaceable>text</replaceable></term>
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<listitem><para>
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Template for auto-generated comments, the default (for C code generations) is
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<literal>"/* @comment@ */"</literal>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--template</option> <replaceable>file</replaceable></term>
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<listitem><para>
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Read templates from the given file. The templates are enclosed in
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specially-formatted C comments
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<programlisting>
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/*** BEGIN section ***/
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/*** END section ***/
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</programlisting>
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where section may be <literal>file-header</literal>,
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<literal>file-production</literal>, <literal>file-tail</literal>,
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<literal>enumeration-production</literal>, <literal>value-header</literal>,
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<literal>value-production</literal>, <literal>value-tail</literal> or
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<literal>comment</literal>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--identifier-prefix</option> <replaceable>prefix</replaceable></term>
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<listitem><para>
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Indicates what portion of the enum name should be intepreted as the
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prefix (eg, the "<literal>Gtk</literal>" in
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"<literal>GtkDirectionType</literal>"). Normally this will be figured
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out automatically, but you may need to override the default if your
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namespace is capitalized oddly.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--symbol-prefix</option> <replaceable>prefix</replaceable></term>
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<listitem><para>
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Indicates what prefix should be used to correspond to the identifier
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prefix in related C function names (eg, the "<literal>gtk</literal>"
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in "<literal>gtk_direction_type_get_type</literal>". Equivalently,
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this is the lowercase version of the prefix component of the enum
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value names (eg, the "<literal>GTK</literal>" in
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"<literal>GTK_DIR_UP</literal>". The default value is the identifier
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prefix, converted to lowercase.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--help</option></term>
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<listitem><para>
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Print brief help and exit.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem><para>
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Print version and exit.
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</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2><title>Production text substitutions</title>
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<para>
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Certain keywords enclosed in @ characters will be substituted in the
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emitted text. For the substitution examples of the keywords below,
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the following example enum definition is assumed:
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<programlisting>
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typedef enum
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{
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PREFIX_THE_XVALUE = 1 << 3,
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PREFIX_ANOTHER_VALUE = 1 << 4
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} PrefixTheXEnum;
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</programlisting>
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<variablelist>
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<varlistentry>
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<term>@EnumName@</term>
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<listitem><para>
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The name of the enum currently being processed, enum names are assumed to be
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properly namespaced and to use mixed capitalization to separate
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words (e.g. PrefixTheXEnum).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@enum_name@</term>
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<listitem><para>
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The enum name with words lowercase and word-separated by underscores
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(e.g. prefix_the_xenum).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@ENUMNAME@</term>
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<listitem><para>
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The enum name with words uppercase and word-separated by underscores
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(e.g. PREFIX_THE_XENUM).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@ENUMSHORT@</term>
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<listitem><para>
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The enum name with words uppercase and word-separated by underscores,
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prefix stripped (e.g. THE_XENUM).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@VALUENAME@</term>
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<listitem><para>
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The enum value name currently being processed with words uppercase and
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word-separated by underscores,
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this is the assumed literal notation of enum values in the C sources
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(e.g. PREFIX_THE_XVALUE).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@valuenick@</term>
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<listitem><para>
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A nick name for the enum value currently being processed, this is usually
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generated by stripping common prefix words of all the enum values of the
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current enum, the words are lowercase and underscores are substituted by a
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minus (e.g. the-xvalue).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@valuenum@</term>
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<listitem><para>
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The integer value for the enum value currently being processed. This is
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calculated by using <command>perl</command> to attempt to evaluate the
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expression as it appears in the C source code. If evaluation fails then
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<command>glib-mkenums</command> will exit with an error status, but this
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only happens if <literal>@valuenum@</literal> appears in your value
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production template. (Since: 2.26)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@type@</term>
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<listitem><para>
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This is substituted either by "enum" or "flags", depending on whether the
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enum value definitions contained bit-shift operators or not (e.g. flags).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@Type@</term>
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<listitem><para>
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The same as <literal>@type@</literal> with the first letter capitalized (e.g. Flags).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@TYPE@</term>
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<listitem><para>
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The same as <literal>@type@</literal> with all letters uppercased (e.g. FLAGS).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@filename@</term>
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<listitem><para>
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The name of the input file currently being processed (e.g. foo.h).
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>@basename@</term>
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<listitem><para>
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The base name of the input file currently being processed (e.g. foo.h). (Since: 2.22)
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</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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<refsect2><title>Trigraph extensions</title>
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<para>
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Some C comments are treated specially in the parsed enum definitions,
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such comments start out with the trigraph sequence <literal>/*<</literal>
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and end with the trigraph sequence <literal>>*/</literal>.
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Per enum definition, the options "skip" and "flags" can be specified, to
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indicate this enum definition to be skipped, or for it to be treated as
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a flags definition, or to specify the common prefix to be stripped from
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all values to generate value nicknames, respectively. The "underscore_name"
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option can be used to specify the word separation used in the *_get_type()
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function. For instance, /*< underscore_name=gnome_vfs_uri_hide_options >*/.
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</para>
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<para>
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Per value definition, the options "skip" and "nick" are supported.
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The former causes the value to be skipped, and the latter can be used to
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specify the otherwise auto-generated nickname.
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Examples:
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<programlisting>
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typedef enum /*< skip >*/
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{
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PREFIX_FOO
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} PrefixThisEnumWillBeSkipped;
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typedef enum /*< flags,prefix=PREFIX >*/
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{
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PREFIX_THE_ZEROTH_VALUE, /*< skip >*/
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PREFIX_THE_FIRST_VALUE,
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PREFIX_THE_SECOND_VALUE,
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PREFIX_THE_THIRD_VALUE, /*< nick=the-last-value >*/
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} PrefixTheFlagsEnum;
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</programlisting>
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</para>
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</refsect2>
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</refsect1>
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<refsect1><title>See also</title>
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<para>
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<citerefentry>
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<refentrytitle>glib-genmarshal</refentrytitle>
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<manvolnum>1</manvolnum>
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</citerefentry>
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</para>
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</refsect1>
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</refentry>
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