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glib-mkenums - C language enum description generation utility


glib-mkenums [OPTION...] [FILE...]


glib-mkenums is a small perl-script utility that parses C code to extract enum definitions
and produces enum descriptions based on text templates specified by the user. Most
frequently this script is used to produce C code that contains enum values as strings so
programs can provide value name strings for introspection.

glib-mkenums takes a list of valid C code files as input. The options specified control
the text that is output, certain substitutions are performed on the text templates for
keywords enclosed in @ characters.

Production text substitutions
Certain keywords enclosed in @ characters will be substituted in the emitted text. For the
substitution examples of the keywords below, the following example enum definition is

The name of the enum currently being processed, enum names are assumed to be properly
namespaced and to use mixed capitalization to separate words (e.g. PrefixTheXEnum).

The enum name with words lowercase and word-separated by underscores (e.g.

The enum name with words uppercase and word-separated by underscores (e.g.

The enum name with words uppercase and word-separated by underscores, prefix stripped
(e.g. THE_XENUM).

The prefix of the enum name (e.g. PREFIX).

The enum value name currently being processed with words uppercase and word-separated
by underscores, this is the assumed literal notation of enum values in the C sources

A nick name for the enum value currently being processed, this is usually generated by
stripping common prefix words of all the enum values of the current enum, the words
are lowercase and underscores are substituted by a minus (e.g. the-xvalue).

The integer value for the enum value currently being processed. This is calculated by
using perl to attempt to evaluate the expression as it appears in the C source code.
If evaluation fails then glib-mkenums will exit with an error status, but this only
happens if @valuenum@ appears in your value production template. (Since: 2.26)

This is substituted either by "enum" or "flags", depending on whether the enum value
definitions contained bit-shift operators or not (e.g. flags).

The same as @type@ with the first letter capitalized (e.g. Flags).

The same as @type@ with all letters uppercased (e.g. FLAGS).

The name of the input file currently being processed (e.g. foo.h).

The base name of the input file currently being processed (e.g. foo.h). (Since: 2.22)

Trigraph extensions
Some C comments are treated specially in the parsed enum definitions, such comments start
out with the trigraph sequence /*< and end with the trigraph sequence >*/. Per enum
definition, the options "skip" and "flags" can be specified, to indicate this enum
definition to be skipped, or for it to be treated as a flags definition, or to specify the
common prefix to be stripped from all values to generate value nicknames, respectively.
The "underscore_name" option can be used to specify the word separation used in the
*_get_type() function. For instance, /*< underscore_name=gnome_vfs_uri_hide_options >*/.

Per value definition, the options "skip" and "nick" are supported. The former causes the
value to be skipped, and the latter can be used to specify the otherwise auto-generated
nickname. Examples:


--fhead TEXT
Put out TEXT prior to processing input files.

--fprod TEXT
Put out TEXT everytime a new input file is being processed.

--ftail TEXT
Put out TEXT after all input files have been processed.

--eprod TEXT
Put out TEXT everytime an enum is encountered in the input files.

--vhead TEXT
Put out TEXT before iterating over the set of values of an enum.

--vprod TEXT
Put out TEXT for every value of an enum.

--vtail TEXT
Put out TEXT after iterating over all values of an enum.

--comments TEXT
Template for auto-generated comments, the default (for C code generations) is "/*
@comment@ */".

--template FILE
Read templates from the given file. The templates are enclosed in specially-formatted
C comments
where section may be file-header, file-production, file-tail, enumeration-production,
value-header, value-production, value-tail or comment.

--identifier-prefix PREFIX
Indicates what portion of the enum name should be intepreted as the prefix (eg, the
"Gtk" in "GtkDirectionType"). Normally this will be figured out automatically, but you
may need to override the default if your namespace is capitalized oddly.

--symbol-prefix PREFIX
Indicates what prefix should be used to correspond to the identifier prefix in related
C function names (eg, the "gtk" in "gtk_direction_type_get_type". Equivalently, this
is the lowercase version of the prefix component of the enum value names (eg, the
"GTK" in "GTK_DIR_UP". The default value is the identifier prefix, converted to

Print brief help and exit.

Print version and exit.

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