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/* goption.h - Option parser
*
* Copyright (C) 2004 Anders Carlsson <andersca@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __G_OPTION_H__
#define __G_OPTION_H__
#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
#error "Only <glib.h> can be included directly."
#endif
#include <glib/gerror.h>
#include <glib/gquark.h>
G_BEGIN_DECLS
/**
* GOptionContext:
*
* A `GOptionContext` struct defines which options
* are accepted by the commandline option parser. The struct has only private
* fields and should not be directly accessed.
*/
typedef struct _GOptionContext GOptionContext;
/**
* GOptionGroup:
*
* A `GOptionGroup` struct defines the options in a single
* group. The struct has only private fields and should not be directly accessed.
*
* All options in a group share the same translation function. Libraries which
* need to parse commandline options are expected to provide a function for
* getting a `GOptionGroup` holding their options, which
* the application can then add to its #GOptionContext.
*/
typedef struct _GOptionGroup GOptionGroup;
typedef struct _GOptionEntry GOptionEntry;
/**
* GOptionFlags:
* @G_OPTION_FLAG_NONE: No flags. Since: 2.42.
* @G_OPTION_FLAG_HIDDEN: The option doesn't appear in `--help` output.
* @G_OPTION_FLAG_IN_MAIN: The option appears in the main section of the
* `--help` output, even if it is defined in a group.
* @G_OPTION_FLAG_REVERSE: For options of the %G_OPTION_ARG_NONE kind, this
* flag indicates that the sense of the option is reversed.
* @G_OPTION_FLAG_NO_ARG: For options of the %G_OPTION_ARG_CALLBACK kind,
* this flag indicates that the callback does not take any argument
* (like a %G_OPTION_ARG_NONE option). Since 2.8
* @G_OPTION_FLAG_FILENAME: For options of the %G_OPTION_ARG_CALLBACK
* kind, this flag indicates that the argument should be passed to the
* callback in the GLib filename encoding rather than UTF-8. Since 2.8
* @G_OPTION_FLAG_OPTIONAL_ARG: For options of the %G_OPTION_ARG_CALLBACK
* kind, this flag indicates that the argument supply is optional.
* If no argument is given then data of %GOptionParseFunc will be
* set to NULL. Since 2.8
* @G_OPTION_FLAG_NOALIAS: This flag turns off the automatic conflict
* resolution which prefixes long option names with `groupname-` if
* there is a conflict. This option should only be used in situations
* where aliasing is necessary to model some legacy commandline interface.
* It is not safe to use this option, unless all option groups are under
* your direct control. Since 2.8.
*
* Flags which modify individual options.
*/
typedef enum
{
G_OPTION_FLAG_NONE = 0,
G_OPTION_FLAG_HIDDEN = 1 << 0,
G_OPTION_FLAG_IN_MAIN = 1 << 1,
G_OPTION_FLAG_REVERSE = 1 << 2,
G_OPTION_FLAG_NO_ARG = 1 << 3,
G_OPTION_FLAG_FILENAME = 1 << 4,
G_OPTION_FLAG_OPTIONAL_ARG = 1 << 5,
G_OPTION_FLAG_NOALIAS = 1 << 6
} GOptionFlags;
/**
* GOptionArg:
* @G_OPTION_ARG_NONE: No extra argument. This is useful for simple flags.
* @G_OPTION_ARG_STRING: The option takes a UTF-8 string argument.
* @G_OPTION_ARG_INT: The option takes an integer argument.
* @G_OPTION_ARG_CALLBACK: The option provides a callback (of type
* #GOptionArgFunc) to parse the extra argument.
* @G_OPTION_ARG_FILENAME: The option takes a filename as argument, which will
be in the GLib filename encoding rather than UTF-8.
* @G_OPTION_ARG_STRING_ARRAY: The option takes a string argument, multiple
* uses of the option are collected into an array of strings.
* @G_OPTION_ARG_FILENAME_ARRAY: The option takes a filename as argument,
* multiple uses of the option are collected into an array of strings.
* @G_OPTION_ARG_DOUBLE: The option takes a double argument. The argument
* can be formatted either for the user's locale or for the "C" locale.
* Since 2.12
* @G_OPTION_ARG_INT64: The option takes a 64-bit integer. Like
* %G_OPTION_ARG_INT but for larger numbers. The number can be in
* decimal base, or in hexadecimal (when prefixed with `0x`, for
* example, `0xffffffff`). Since 2.12
*
* The #GOptionArg enum values determine which type of extra argument the
* options expect to find. If an option expects an extra argument, it can
* be specified in several ways; with a short option: `-x arg`, with a long
* option: `--name arg` or combined in a single argument: `--name=arg`.
*/
typedef enum
{
G_OPTION_ARG_NONE,
G_OPTION_ARG_STRING,
G_OPTION_ARG_INT,
G_OPTION_ARG_CALLBACK,
G_OPTION_ARG_FILENAME,
G_OPTION_ARG_STRING_ARRAY,
G_OPTION_ARG_FILENAME_ARRAY,
G_OPTION_ARG_DOUBLE,
G_OPTION_ARG_INT64
} GOptionArg;
/**
* GOptionArgFunc:
* @option_name: The name of the option being parsed. This will be either a
* single dash followed by a single letter (for a short name) or two dashes
* followed by a long option name.
* @value: The value to be parsed.
* @data: User data added to the #GOptionGroup containing the option when it
* was created with g_option_group_new()
* @error: A return location for errors. The error code %G_OPTION_ERROR_FAILED
* is intended to be used for errors in #GOptionArgFunc callbacks.
*
* The type of function to be passed as callback for %G_OPTION_ARG_CALLBACK
* options.
*
* Returns: %TRUE if the option was successfully parsed, %FALSE if an error
* occurred, in which case @error should be set with g_set_error()
*/
typedef gboolean (*GOptionArgFunc) (const gchar *option_name,
const gchar *value,
gpointer data,
GError **error);
/**
* GOptionParseFunc:
* @context: The active #GOptionContext
* @group: The group to which the function belongs
* @data: User data added to the #GOptionGroup containing the option when it
* was created with g_option_group_new()
* @error: A return location for error details
*
* The type of function that can be called before and after parsing.
*
* Returns: %TRUE if the function completed successfully, %FALSE if an error
* occurred, in which case @error should be set with g_set_error()
*/
typedef gboolean (*GOptionParseFunc) (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error);
/**
* GOptionErrorFunc:
* @context: The active #GOptionContext
* @group: The group to which the function belongs
* @data: User data added to the #GOptionGroup containing the option when it
* was created with g_option_group_new()
* @error: The #GError containing details about the parse error
*
* The type of function to be used as callback when a parse error occurs.
*/
typedef void (*GOptionErrorFunc) (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error);
/**
* G_OPTION_ERROR:
*
* Error domain for option parsing. Errors in this domain will
* be from the #GOptionError enumeration. See #GError for information on
* error domains.
*/
#define G_OPTION_ERROR (g_option_error_quark ())
/**
* GOptionError:
* @G_OPTION_ERROR_UNKNOWN_OPTION: An option was not known to the parser.
* This error will only be reported, if the parser hasn't been instructed
* to ignore unknown options, see g_option_context_set_ignore_unknown_options().
* @G_OPTION_ERROR_BAD_VALUE: A value couldn't be parsed.
* @G_OPTION_ERROR_FAILED: A #GOptionArgFunc callback failed.
*
* Error codes returned by option parsing.
*/
typedef enum
{
G_OPTION_ERROR_UNKNOWN_OPTION,
G_OPTION_ERROR_BAD_VALUE,
G_OPTION_ERROR_FAILED
} GOptionError;
GLIB_AVAILABLE_IN_ALL
GQuark g_option_error_quark (void);
/**
* GOptionEntry:
* @long_name: The long name of an option can be used to specify it
* in a commandline as `--long_name`. Every option must have a
* long name. To resolve conflicts if multiple option groups contain
* the same long name, it is also possible to specify the option as
* `--groupname-long_name`.
* @short_name: If an option has a short name, it can be specified
* `-short_name` in a commandline. @short_name must be a printable
* ASCII character different from '-', or zero if the option has no
* short name.
* @flags: Flags from #GOptionFlags
* @arg: The type of the option, as a #GOptionArg
* @arg_data: If the @arg type is %G_OPTION_ARG_CALLBACK, then @arg_data
* must point to a #GOptionArgFunc callback function, which will be
* called to handle the extra argument. Otherwise, @arg_data is a
* pointer to a location to store the value, the required type of
* the location depends on the @arg type:
* - %G_OPTION_ARG_NONE: %gboolean
* - %G_OPTION_ARG_STRING: %gchar*
* - %G_OPTION_ARG_INT: %gint
* - %G_OPTION_ARG_FILENAME: %gchar*
* - %G_OPTION_ARG_STRING_ARRAY: %gchar**
* - %G_OPTION_ARG_FILENAME_ARRAY: %gchar**
* - %G_OPTION_ARG_DOUBLE: %gdouble
* If @arg type is %G_OPTION_ARG_STRING or %G_OPTION_ARG_FILENAME,
* the location will contain a newly allocated string if the option
* was given. That string needs to be freed by the callee using g_free().
* Likewise if @arg type is %G_OPTION_ARG_STRING_ARRAY or
* %G_OPTION_ARG_FILENAME_ARRAY, the data should be freed using g_strfreev().
* @description: the description for the option in `--help`
* output. The @description is translated using the @translate_func
* of the group, see g_option_group_set_translation_domain().
* @arg_description: The placeholder to use for the extra argument parsed
* by the option in `--help` output. The @arg_description is translated
* using the @translate_func of the group, see
* g_option_group_set_translation_domain().
*
* A GOptionEntry struct defines a single option. To have an effect, they
* must be added to a #GOptionGroup with g_option_context_add_main_entries()
* or g_option_group_add_entries().
*/
struct _GOptionEntry
{
const gchar *long_name;
gchar short_name;
gint flags;
GOptionArg arg;
gpointer arg_data;
const gchar *description;
const gchar *arg_description;
};
/**
* G_OPTION_REMAINING:
*
* If a long option in the main group has this name, it is not treated as a
* regular option. Instead it collects all non-option arguments which would
* otherwise be left in `argv`. The option must be of type
* %G_OPTION_ARG_CALLBACK, %G_OPTION_ARG_STRING_ARRAY
* or %G_OPTION_ARG_FILENAME_ARRAY.
*
*
* Using #G_OPTION_REMAINING instead of simply scanning `argv`
* for leftover arguments has the advantage that GOption takes care of
* necessary encoding conversions for strings or filenames.
*
* Since: 2.6
*/
#define G_OPTION_REMAINING ""
GLIB_AVAILABLE_IN_ALL
GOptionContext *g_option_context_new (const gchar *parameter_string);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_summary (GOptionContext *context,
const gchar *summary);
GLIB_AVAILABLE_IN_ALL
const gchar * g_option_context_get_summary (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_description (GOptionContext *context,
const gchar *description);
GLIB_AVAILABLE_IN_ALL
const gchar * g_option_context_get_description (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
void g_option_context_free (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_help_enabled (GOptionContext *context,
gboolean help_enabled);
GLIB_AVAILABLE_IN_ALL
gboolean g_option_context_get_help_enabled (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_ignore_unknown_options (GOptionContext *context,
gboolean ignore_unknown);
GLIB_AVAILABLE_IN_ALL
gboolean g_option_context_get_ignore_unknown_options (GOptionContext *context);
GLIB_AVAILABLE_IN_2_44
void g_option_context_set_strict_posix (GOptionContext *context,
gboolean strict_posix);
GLIB_AVAILABLE_IN_2_44
gboolean g_option_context_get_strict_posix (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
void g_option_context_add_main_entries (GOptionContext *context,
const GOptionEntry *entries,
const gchar *translation_domain);
GLIB_AVAILABLE_IN_ALL
gboolean g_option_context_parse (GOptionContext *context,
gint *argc,
gchar ***argv,
GError **error);
GLIB_AVAILABLE_IN_2_40
gboolean g_option_context_parse_strv (GOptionContext *context,
gchar ***arguments,
GError **error);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_translate_func (GOptionContext *context,
GTranslateFunc func,
gpointer data,
GDestroyNotify destroy_notify);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_translation_domain (GOptionContext *context,
const gchar *domain);
GLIB_AVAILABLE_IN_ALL
void g_option_context_add_group (GOptionContext *context,
GOptionGroup *group);
GLIB_AVAILABLE_IN_ALL
void g_option_context_set_main_group (GOptionContext *context,
GOptionGroup *group);
GLIB_AVAILABLE_IN_ALL
GOptionGroup *g_option_context_get_main_group (GOptionContext *context);
GLIB_AVAILABLE_IN_ALL
gchar *g_option_context_get_help (GOptionContext *context,
gboolean main_help,
GOptionGroup *group);
GLIB_AVAILABLE_IN_ALL
GOptionGroup *g_option_group_new (const gchar *name,
const gchar *description,
const gchar *help_description,
gpointer user_data,
GDestroyNotify destroy);
GLIB_AVAILABLE_IN_ALL
void g_option_group_set_parse_hooks (GOptionGroup *group,
GOptionParseFunc pre_parse_func,
GOptionParseFunc post_parse_func);
GLIB_AVAILABLE_IN_ALL
void g_option_group_set_error_hook (GOptionGroup *group,
GOptionErrorFunc error_func);
GLIB_DEPRECATED_IN_2_44
void g_option_group_free (GOptionGroup *group);
GLIB_AVAILABLE_IN_2_44
GOptionGroup *g_option_group_ref (GOptionGroup *group);
GLIB_AVAILABLE_IN_2_44
void g_option_group_unref (GOptionGroup *group);
GLIB_AVAILABLE_IN_ALL
void g_option_group_add_entries (GOptionGroup *group,
const GOptionEntry *entries);
GLIB_AVAILABLE_IN_ALL
void g_option_group_set_translate_func (GOptionGroup *group,
GTranslateFunc func,
gpointer data,
GDestroyNotify destroy_notify);
GLIB_AVAILABLE_IN_ALL
void g_option_group_set_translation_domain (GOptionGroup *group,
const gchar *domain);
G_END_DECLS
#endif /* __G_OPTION_H__ */
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