1 /* goption.c - Option parser
3 * Copyright (C) 1999, 2003 Red Hat Software
4 * Copyright (C) 2004 Anders Carlsson <andersca@gnome.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
24 * @Short_description: parses commandline options
25 * @Title: Commandline option parser
27 * The GOption commandline parser is intended to be a simpler replacement
28 * for the popt library. It supports short and long commandline options,
29 * as shown in the following example:
31 * <literal>testtreemodel -r 1 --max-size 20 --rand --display=:1.0 -vb -- file1 file2</literal>
33 * The example demonstrates a number of features of the GOption
35 * <itemizedlist><listitem><para>
36 * Options can be single letters, prefixed by a single dash. Multiple
37 * short options can be grouped behind a single dash.
38 * </para></listitem><listitem><para>
39 * Long options are prefixed by two consecutive dashes.
40 * </para></listitem><listitem><para>
41 * Options can have an extra argument, which can be a number, a string or
42 * a filename. For long options, the extra argument can be appended with
43 * an equals sign after the option name, which is useful if the extra
44 * argument starts with a dash, which would otherwise cause it to be
45 * interpreted as another option.
46 * </para></listitem><listitem><para>
47 * Non-option arguments are returned to the application as rest arguments.
48 * </para></listitem><listitem><para>
49 * An argument consisting solely of two dashes turns off further parsing,
50 * any remaining arguments (even those starting with a dash) are returned
51 * to the application as rest arguments.
52 * </para></listitem></itemizedlist>
54 * Another important feature of GOption is that it can automatically
55 * generate nicely formatted help output. Unless it is explicitly turned
56 * off with g_option_context_set_help_enabled(), GOption will recognize
57 * the <option>--help</option>, <option>-?</option>,
58 * <option>--help-all</option> and
59 * <option>--help-</option><replaceable>groupname</replaceable> options
60 * (where <replaceable>groupname</replaceable> is the name of a
61 * #GOptionGroup) and write a text similar to the one shown in the
62 * following example to stdout.
64 * <informalexample><screen>
66 * testtreemodel [OPTION...] - test tree model performance
69 * -h, --help Show help options
70 * --help-all Show all help options
71 * --help-gtk Show GTK+ Options
73 * Application Options:
74 * -r, --repeats=N Average over N repetitions
75 * -m, --max-size=M Test up to 2^M items
76 * --display=DISPLAY X display to use
77 * -v, --verbose Be verbose
78 * -b, --beep Beep when done
79 * --rand Randomize the data
80 * </screen></informalexample>
82 * GOption groups options in #GOptionGroup<!-- -->s, which makes it easy to
83 * incorporate options from multiple sources. The intended use for this is
84 * to let applications collect option groups from the libraries it uses,
85 * add them to their #GOptionContext, and parse all options by a single call
86 * to g_option_context_parse(). See gtk_get_option_group() for an example.
88 * If an option is declared to be of type string or filename, GOption takes
89 * care of converting it to the right encoding; strings are returned in
90 * UTF-8, filenames are returned in the GLib filename encoding. Note that
91 * this only works if setlocale() has been called before
92 * g_option_context_parse().
94 * Here is a complete example of setting up GOption to parse the example
95 * commandline above and produce the example help output.
97 * <informalexample><programlisting>
98 * static gint repeats = 2;
99 * static gint max_size = 8;
100 * static gboolean verbose = FALSE;
101 * static gboolean beep = FALSE;
102 * static gboolean rand = FALSE;
104 * static GOptionEntry entries[] =
106 * { "repeats", 'r', 0, G_OPTION_ARG_INT, &repeats, "Average over N repetitions", "N" },
107 * { "max-size", 'm', 0, G_OPTION_ARG_INT, &max_size, "Test up to 2^M items", "M" },
108 * { "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, "Be verbose", NULL },
109 * { "beep", 'b', 0, G_OPTION_ARG_NONE, &beep, "Beep when done", NULL },
110 * { "rand", 0, 0, G_OPTION_ARG_NONE, &rand, "Randomize the data", NULL },
115 * main (int argc, char *argv[])
117 * GError *error = NULL;
118 * GOptionContext *context;
120 * context = g_option_context_new ("- test tree model performance");
121 * g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
122 * g_option_context_add_group (context, gtk_get_option_group (TRUE));
123 * if (!g_option_context_parse (context, &argc, &argv, &error))
125 * g_print ("option parsing failed: %s\n", error->message);
132 * </programlisting></informalexample>
145 #include "glibintl.h"
147 #define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
149 #define NO_ARG(entry) ((entry)->arg == G_OPTION_ARG_NONE || \
150 ((entry)->arg == G_OPTION_ARG_CALLBACK && \
151 ((entry)->flags & G_OPTION_FLAG_NO_ARG)))
153 #define OPTIONAL_ARG(entry) ((entry)->arg == G_OPTION_ARG_CALLBACK && \
154 (entry)->flags & G_OPTION_FLAG_OPTIONAL_ARG)
186 struct _GOptionContext
190 gchar
*parameter_string
;
194 GTranslateFunc translate_func
;
195 GDestroyNotify translate_notify
;
196 gpointer translate_data
;
198 guint help_enabled
: 1;
199 guint ignore_unknown
: 1;
201 GOptionGroup
*main_group
;
203 /* We keep a list of change so we can revert them */
206 /* We also keep track of all argv elements
207 * that should be NULLed or modified.
209 GList
*pending_nulls
;
216 gchar
*help_description
;
218 GDestroyNotify destroy_notify
;
221 GTranslateFunc translate_func
;
222 GDestroyNotify translate_notify
;
223 gpointer translate_data
;
225 GOptionEntry
*entries
;
228 GOptionParseFunc pre_parse_func
;
229 GOptionParseFunc post_parse_func
;
230 GOptionErrorFunc error_func
;
233 static void free_changes_list (GOptionContext
*context
,
235 static void free_pending_nulls (GOptionContext
*context
,
236 gboolean perform_nulls
);
240 _g_unichar_get_width (gunichar c
)
242 if (G_UNLIKELY (g_unichar_iszerowidth (c
)))
245 /* we ignore the fact that we should call g_unichar_iswide_cjk() under
246 * some locales (legacy East Asian ones) */
247 if (g_unichar_iswide (c
))
254 _g_utf8_strwidth (const gchar
*p
,
258 const gchar
*start
= p
;
259 g_return_val_if_fail (p
!= NULL
|| max
== 0, 0);
265 len
+= _g_unichar_get_width (g_utf8_get_char (p
));
266 p
= g_utf8_next_char (p
);
274 /* this case may not be quite correct */
276 len
+= _g_unichar_get_width (g_utf8_get_char (p
));
277 p
= g_utf8_next_char (p
);
279 while (p
- start
< max
&& *p
)
281 len
+= _g_unichar_get_width (g_utf8_get_char (p
));
282 p
= g_utf8_next_char (p
);
291 g_option_error_quark (void)
293 return g_quark_from_static_string ("g-option-context-error-quark");
297 * g_option_context_new:
298 * @parameter_string: a string which is displayed in
299 * the first line of <option>--help</option> output, after the
301 * <literal><replaceable>programname</replaceable> [OPTION...]</literal>
303 * Creates a new option context.
305 * The @parameter_string can serve multiple purposes. It can be used
306 * to add descriptions for "rest" arguments, which are not parsed by
307 * the #GOptionContext, typically something like "FILES" or
308 * "FILE1 FILE2...". If you are using #G_OPTION_REMAINING for
309 * collecting "rest" arguments, GLib handles this automatically by
310 * using the @arg_description of the corresponding #GOptionEntry in
313 * Another usage is to give a short summary of the program
314 * functionality, like " - frob the strings", which will be displayed
315 * in the same line as the usage. For a longer description of the
316 * program functionality that should be displayed as a paragraph
317 * below the usage line, use g_option_context_set_summary().
319 * Note that the @parameter_string is translated using the
320 * function set with g_option_context_set_translate_func(), so
321 * it should normally be passed untranslated.
323 * Returns: a newly created #GOptionContext, which must be
324 * freed with g_option_context_free() after use.
329 g_option_context_new (const gchar
*parameter_string
)
332 GOptionContext
*context
;
334 context
= g_new0 (GOptionContext
, 1);
336 context
->parameter_string
= g_strdup (parameter_string
);
337 context
->help_enabled
= TRUE
;
338 context
->ignore_unknown
= FALSE
;
344 * g_option_context_free:
345 * @context: a #GOptionContext
347 * Frees context and all the groups which have been
350 * Please note that parsed arguments need to be freed separately (see
355 void g_option_context_free (GOptionContext
*context
)
357 g_return_if_fail (context
!= NULL
);
359 g_list_foreach (context
->groups
, (GFunc
)g_option_group_free
, NULL
);
360 g_list_free (context
->groups
);
362 if (context
->main_group
)
363 g_option_group_free (context
->main_group
);
365 free_changes_list (context
, FALSE
);
366 free_pending_nulls (context
, FALSE
);
368 g_free (context
->parameter_string
);
369 g_free (context
->summary
);
370 g_free (context
->description
);
372 if (context
->translate_notify
)
373 (* context
->translate_notify
) (context
->translate_data
);
380 * g_option_context_set_help_enabled:
381 * @context: a #GOptionContext
382 * @help_enabled: %TRUE to enable <option>--help</option>, %FALSE to disable it
384 * Enables or disables automatic generation of <option>--help</option>
385 * output. By default, g_option_context_parse() recognizes
386 * <option>--help</option>, <option>-h</option>,
387 * <option>-?</option>, <option>--help-all</option>
388 * and <option>--help-</option><replaceable>groupname</replaceable> and creates
389 * suitable output to stdout.
393 void g_option_context_set_help_enabled (GOptionContext
*context
,
394 gboolean help_enabled
)
397 g_return_if_fail (context
!= NULL
);
399 context
->help_enabled
= help_enabled
;
403 * g_option_context_get_help_enabled:
404 * @context: a #GOptionContext
406 * Returns whether automatic <option>--help</option> generation
407 * is turned on for @context. See g_option_context_set_help_enabled().
409 * Returns: %TRUE if automatic help generation is turned on.
414 g_option_context_get_help_enabled (GOptionContext
*context
)
416 g_return_val_if_fail (context
!= NULL
, FALSE
);
418 return context
->help_enabled
;
422 * g_option_context_set_ignore_unknown_options:
423 * @context: a #GOptionContext
424 * @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
425 * an error when unknown options are met
427 * Sets whether to ignore unknown options or not. If an argument is
428 * ignored, it is left in the @argv array after parsing. By default,
429 * g_option_context_parse() treats unknown options as error.
431 * This setting does not affect non-option arguments (i.e. arguments
432 * which don't start with a dash). But note that GOption cannot reliably
433 * determine whether a non-option belongs to a preceding unknown option.
438 g_option_context_set_ignore_unknown_options (GOptionContext
*context
,
439 gboolean ignore_unknown
)
441 g_return_if_fail (context
!= NULL
);
443 context
->ignore_unknown
= ignore_unknown
;
447 * g_option_context_get_ignore_unknown_options:
448 * @context: a #GOptionContext
450 * Returns whether unknown options are ignored or not. See
451 * g_option_context_set_ignore_unknown_options().
453 * Returns: %TRUE if unknown options are ignored.
458 g_option_context_get_ignore_unknown_options (GOptionContext
*context
)
460 g_return_val_if_fail (context
!= NULL
, FALSE
);
462 return context
->ignore_unknown
;
466 * g_option_context_add_group:
467 * @context: a #GOptionContext
468 * @group: the group to add
470 * Adds a #GOptionGroup to the @context, so that parsing with @context
471 * will recognize the options in the group. Note that the group will
472 * be freed together with the context when g_option_context_free() is
473 * called, so you must not free the group yourself after adding it
479 g_option_context_add_group (GOptionContext
*context
,
484 g_return_if_fail (context
!= NULL
);
485 g_return_if_fail (group
!= NULL
);
486 g_return_if_fail (group
->name
!= NULL
);
487 g_return_if_fail (group
->description
!= NULL
);
488 g_return_if_fail (group
->help_description
!= NULL
);
490 for (list
= context
->groups
; list
; list
= list
->next
)
492 GOptionGroup
*g
= (GOptionGroup
*)list
->data
;
494 if ((group
->name
== NULL
&& g
->name
== NULL
) ||
495 (group
->name
&& g
->name
&& strcmp (group
->name
, g
->name
) == 0))
496 g_warning ("A group named \"%s\" is already part of this GOptionContext",
500 context
->groups
= g_list_append (context
->groups
, group
);
504 * g_option_context_set_main_group:
505 * @context: a #GOptionContext
506 * @group: the group to set as main group
508 * Sets a #GOptionGroup as main group of the @context.
509 * This has the same effect as calling g_option_context_add_group(),
510 * the only difference is that the options in the main group are
511 * treated differently when generating <option>--help</option> output.
516 g_option_context_set_main_group (GOptionContext
*context
,
519 g_return_if_fail (context
!= NULL
);
520 g_return_if_fail (group
!= NULL
);
522 if (context
->main_group
)
524 g_warning ("This GOptionContext already has a main group");
529 context
->main_group
= group
;
533 * g_option_context_get_main_group:
534 * @context: a #GOptionContext
536 * Returns a pointer to the main group of @context.
538 * Return value: the main group of @context, or %NULL if @context doesn't
539 * have a main group. Note that group belongs to @context and should
540 * not be modified or freed.
545 g_option_context_get_main_group (GOptionContext
*context
)
547 g_return_val_if_fail (context
!= NULL
, NULL
);
549 return context
->main_group
;
553 * g_option_context_add_main_entries:
554 * @context: a #GOptionContext
555 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
556 * @translation_domain: a translation domain to use for translating
557 * the <option>--help</option> output for the options in @entries
558 * with gettext(), or %NULL
560 * A convenience function which creates a main group if it doesn't
561 * exist, adds the @entries to it and sets the translation domain.
566 g_option_context_add_main_entries (GOptionContext
*context
,
567 const GOptionEntry
*entries
,
568 const gchar
*translation_domain
)
570 g_return_if_fail (entries
!= NULL
);
572 if (!context
->main_group
)
573 context
->main_group
= g_option_group_new (NULL
, NULL
, NULL
, NULL
, NULL
);
575 g_option_group_add_entries (context
->main_group
, entries
);
576 g_option_group_set_translation_domain (context
->main_group
, translation_domain
);
580 calculate_max_length (GOptionGroup
*group
)
583 gint i
, len
, max_length
;
587 for (i
= 0; i
< group
->n_entries
; i
++)
589 entry
= &group
->entries
[i
];
591 if (entry
->flags
& G_OPTION_FLAG_HIDDEN
)
594 len
= _g_utf8_strwidth (entry
->long_name
, -1);
596 if (entry
->short_name
)
599 if (!NO_ARG (entry
) && entry
->arg_description
)
600 len
+= 1 + _g_utf8_strwidth (TRANSLATE (group
, entry
->arg_description
), -1);
602 max_length
= MAX (max_length
, len
);
609 print_entry (GOptionGroup
*group
,
611 const GOptionEntry
*entry
,
616 if (entry
->flags
& G_OPTION_FLAG_HIDDEN
)
619 if (entry
->long_name
[0] == 0)
622 str
= g_string_new (NULL
);
624 if (entry
->short_name
)
625 g_string_append_printf (str
, " -%c, --%s", entry
->short_name
, entry
->long_name
);
627 g_string_append_printf (str
, " --%s", entry
->long_name
);
629 if (entry
->arg_description
)
630 g_string_append_printf (str
, "=%s", TRANSLATE (group
, entry
->arg_description
));
632 g_string_append_printf (string
, "%s%*s %s\n", str
->str
,
633 (int) (max_length
+ 4 - _g_utf8_strwidth (str
->str
, -1)), "",
634 entry
->description
? TRANSLATE (group
, entry
->description
) : "");
635 g_string_free (str
, TRUE
);
639 group_has_visible_entries (GOptionContext
*context
,
641 gboolean main_entries
)
643 GOptionFlags reject_filter
= G_OPTION_FLAG_HIDDEN
;
646 gboolean main_group
= group
== context
->main_group
;
649 reject_filter
|= G_OPTION_FLAG_IN_MAIN
;
651 for (i
= 0, l
= (group
? group
->n_entries
: 0); i
< l
; i
++)
653 entry
= &group
->entries
[i
];
655 if (main_entries
&& !main_group
&& !(entry
->flags
& G_OPTION_FLAG_IN_MAIN
))
657 if (!(entry
->flags
& reject_filter
))
665 group_list_has_visible_entires (GOptionContext
*context
,
667 gboolean main_entries
)
671 if (group_has_visible_entries (context
, group_list
->data
, main_entries
))
674 group_list
= group_list
->next
;
681 context_has_h_entry (GOptionContext
*context
)
686 if (context
->main_group
)
688 for (i
= 0; i
< context
->main_group
->n_entries
; i
++)
690 if (context
->main_group
->entries
[i
].short_name
== 'h')
695 for (list
= context
->groups
; list
!= NULL
; list
= g_list_next (list
))
699 group
= (GOptionGroup
*)list
->data
;
700 for (i
= 0; i
< group
->n_entries
; i
++)
702 if (group
->entries
[i
].short_name
== 'h')
710 * g_option_context_get_help:
711 * @context: a #GOptionContext
712 * @main_help: if %TRUE, only include the main group
713 * @group: the #GOptionGroup to create help for, or %NULL
715 * Returns a formatted, translated help text for the given context.
716 * To obtain the text produced by <option>--help</option>, call
717 * <literal>g_option_context_get_help (context, TRUE, NULL)</literal>.
718 * To obtain the text produced by <option>--help-all</option>, call
719 * <literal>g_option_context_get_help (context, FALSE, NULL)</literal>.
720 * To obtain the help text for an option group, call
721 * <literal>g_option_context_get_help (context, FALSE, group)</literal>.
723 * Returns: A newly allocated string containing the help text
728 g_option_context_get_help (GOptionContext
*context
,
733 gint max_length
, len
;
736 GHashTable
*shadow_map
;
738 const gchar
*rest_description
;
742 string
= g_string_sized_new (1024);
744 rest_description
= NULL
;
745 if (context
->main_group
)
748 for (i
= 0; i
< context
->main_group
->n_entries
; i
++)
750 entry
= &context
->main_group
->entries
[i
];
751 if (entry
->long_name
[0] == 0)
753 rest_description
= TRANSLATE (context
->main_group
, entry
->arg_description
);
759 g_string_append_printf (string
, "%s\n %s %s",
760 _("Usage:"), g_get_prgname(), _("[OPTION...]"));
762 if (rest_description
)
764 g_string_append (string
, " ");
765 g_string_append (string
, rest_description
);
768 if (context
->parameter_string
)
770 g_string_append (string
, " ");
771 g_string_append (string
, TRANSLATE (context
, context
->parameter_string
));
774 g_string_append (string
, "\n\n");
776 if (context
->summary
)
778 g_string_append (string
, TRANSLATE (context
, context
->summary
));
779 g_string_append (string
, "\n\n");
782 memset (seen
, 0, sizeof (gboolean
) * 256);
783 shadow_map
= g_hash_table_new (g_str_hash
, g_str_equal
);
785 if (context
->main_group
)
787 for (i
= 0; i
< context
->main_group
->n_entries
; i
++)
789 entry
= &context
->main_group
->entries
[i
];
790 g_hash_table_insert (shadow_map
,
791 (gpointer
)entry
->long_name
,
794 if (seen
[(guchar
)entry
->short_name
])
795 entry
->short_name
= 0;
797 seen
[(guchar
)entry
->short_name
] = TRUE
;
801 list
= context
->groups
;
804 GOptionGroup
*g
= list
->data
;
805 for (i
= 0; i
< g
->n_entries
; i
++)
807 entry
= &g
->entries
[i
];
808 if (g_hash_table_lookup (shadow_map
, entry
->long_name
) &&
809 !(entry
->flags
& G_OPTION_FLAG_NOALIAS
))
810 entry
->long_name
= g_strdup_printf ("%s-%s", g
->name
, entry
->long_name
);
812 g_hash_table_insert (shadow_map
, (gpointer
)entry
->long_name
, entry
);
814 if (seen
[(guchar
)entry
->short_name
] &&
815 !(entry
->flags
& G_OPTION_FLAG_NOALIAS
))
816 entry
->short_name
= 0;
818 seen
[(guchar
)entry
->short_name
] = TRUE
;
823 g_hash_table_destroy (shadow_map
);
825 list
= context
->groups
;
827 max_length
= _g_utf8_strwidth ("-?, --help", -1);
831 len
= _g_utf8_strwidth ("--help-all", -1);
832 max_length
= MAX (max_length
, len
);
835 if (context
->main_group
)
837 len
= calculate_max_length (context
->main_group
);
838 max_length
= MAX (max_length
, len
);
843 GOptionGroup
*g
= list
->data
;
845 /* First, we check the --help-<groupname> options */
846 len
= _g_utf8_strwidth ("--help-", -1) + _g_utf8_strwidth (g
->name
, -1);
847 max_length
= MAX (max_length
, len
);
849 /* Then we go through the entries */
850 len
= calculate_max_length (g
);
851 max_length
= MAX (max_length
, len
);
856 /* Add a bit of padding */
861 list
= context
->groups
;
863 token
= context_has_h_entry (context
) ? '?' : 'h';
865 g_string_append_printf (string
, "%s\n -%c, --%-*s %s\n",
866 _("Help Options:"), token
, max_length
- 4, "help",
867 _("Show help options"));
869 /* We only want --help-all when there are groups */
871 g_string_append_printf (string
, " --%-*s %s\n",
872 max_length
, "help-all",
873 _("Show all help options"));
877 GOptionGroup
*g
= list
->data
;
879 if (group_has_visible_entries (context
, g
, FALSE
))
880 g_string_append_printf (string
, " --help-%-*s %s\n",
881 max_length
- 5, g
->name
,
882 TRANSLATE (g
, g
->help_description
));
887 g_string_append (string
, "\n");
892 /* Print a certain group */
894 if (group_has_visible_entries (context
, group
, FALSE
))
896 g_string_append (string
, TRANSLATE (group
, group
->description
));
897 g_string_append (string
, "\n");
898 for (i
= 0; i
< group
->n_entries
; i
++)
899 print_entry (group
, max_length
, &group
->entries
[i
], string
);
900 g_string_append (string
, "\n");
905 /* Print all groups */
907 list
= context
->groups
;
911 GOptionGroup
*g
= list
->data
;
913 if (group_has_visible_entries (context
, g
, FALSE
))
915 g_string_append (string
, g
->description
);
916 g_string_append (string
, "\n");
917 for (i
= 0; i
< g
->n_entries
; i
++)
918 if (!(g
->entries
[i
].flags
& G_OPTION_FLAG_IN_MAIN
))
919 print_entry (g
, max_length
, &g
->entries
[i
], string
);
921 g_string_append (string
, "\n");
928 /* Print application options if --help or --help-all has been specified */
929 if ((main_help
|| !group
) &&
930 (group_has_visible_entries (context
, context
->main_group
, TRUE
) ||
931 group_list_has_visible_entires (context
, context
->groups
, TRUE
)))
933 list
= context
->groups
;
935 g_string_append (string
, _("Application Options:"));
936 g_string_append (string
, "\n");
937 if (context
->main_group
)
938 for (i
= 0; i
< context
->main_group
->n_entries
; i
++)
939 print_entry (context
->main_group
, max_length
,
940 &context
->main_group
->entries
[i
], string
);
944 GOptionGroup
*g
= list
->data
;
946 /* Print main entries from other groups */
947 for (i
= 0; i
< g
->n_entries
; i
++)
948 if (g
->entries
[i
].flags
& G_OPTION_FLAG_IN_MAIN
)
949 print_entry (g
, max_length
, &g
->entries
[i
], string
);
954 g_string_append (string
, "\n");
957 if (context
->description
)
959 g_string_append (string
, TRANSLATE (context
, context
->description
));
960 g_string_append (string
, "\n");
963 return g_string_free (string
, FALSE
);
968 print_help (GOptionContext
*context
,
974 help
= g_option_context_get_help (context
, main_help
, group
);
975 g_print ("%s", help
);
982 parse_int (const gchar
*arg_name
,
991 tmp
= strtol (arg
, &end
, 0);
993 if (*arg
== '\0' || *end
!= '\0')
996 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
997 _("Cannot parse integer value '%s' for %s"),
1003 if (*result
!= tmp
|| errno
== ERANGE
)
1006 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1007 _("Integer value '%s' for %s out of range"),
1017 parse_double (const gchar
*arg_name
,
1026 tmp
= g_strtod (arg
, &end
);
1028 if (*arg
== '\0' || *end
!= '\0')
1031 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1032 _("Cannot parse double value '%s' for %s"),
1036 if (errno
== ERANGE
)
1039 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1040 _("Double value '%s' for %s out of range"),
1052 parse_int64 (const gchar
*arg_name
,
1061 tmp
= g_ascii_strtoll (arg
, &end
, 0);
1063 if (*arg
== '\0' || *end
!= '\0')
1066 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1067 _("Cannot parse integer value '%s' for %s"),
1071 if (errno
== ERANGE
)
1074 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1075 _("Integer value '%s' for %s out of range"),
1087 get_change (GOptionContext
*context
,
1088 GOptionArg arg_type
,
1092 Change
*change
= NULL
;
1094 for (list
= context
->changes
; list
!= NULL
; list
= list
->next
)
1096 change
= list
->data
;
1098 if (change
->arg_data
== arg_data
)
1102 change
= g_new0 (Change
, 1);
1103 change
->arg_type
= arg_type
;
1104 change
->arg_data
= arg_data
;
1106 context
->changes
= g_list_prepend (context
->changes
, change
);
1114 add_pending_null (GOptionContext
*context
,
1120 n
= g_new0 (PendingNull
, 1);
1124 context
->pending_nulls
= g_list_prepend (context
->pending_nulls
, n
);
1128 parse_arg (GOptionContext
*context
,
1129 GOptionGroup
*group
,
1130 GOptionEntry
*entry
,
1132 const gchar
*option_name
,
1138 g_assert (value
|| OPTIONAL_ARG (entry
) || NO_ARG (entry
));
1142 case G_OPTION_ARG_NONE
:
1144 change
= get_change (context
, G_OPTION_ARG_NONE
,
1147 *(gboolean
*)entry
->arg_data
= !(entry
->flags
& G_OPTION_FLAG_REVERSE
);
1150 case G_OPTION_ARG_STRING
:
1154 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1159 change
= get_change (context
, G_OPTION_ARG_STRING
,
1161 g_free (change
->allocated
.str
);
1163 change
->prev
.str
= *(gchar
**)entry
->arg_data
;
1164 change
->allocated
.str
= data
;
1166 *(gchar
**)entry
->arg_data
= data
;
1169 case G_OPTION_ARG_STRING_ARRAY
:
1173 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1178 change
= get_change (context
, G_OPTION_ARG_STRING_ARRAY
,
1181 if (change
->allocated
.array
.len
== 0)
1183 change
->prev
.array
= *(gchar
***)entry
->arg_data
;
1184 change
->allocated
.array
.data
= g_new (gchar
*, 2);
1187 change
->allocated
.array
.data
=
1188 g_renew (gchar
*, change
->allocated
.array
.data
,
1189 change
->allocated
.array
.len
+ 2);
1191 change
->allocated
.array
.data
[change
->allocated
.array
.len
] = data
;
1192 change
->allocated
.array
.data
[change
->allocated
.array
.len
+ 1] = NULL
;
1194 change
->allocated
.array
.len
++;
1196 *(gchar
***)entry
->arg_data
= change
->allocated
.array
.data
;
1201 case G_OPTION_ARG_FILENAME
:
1206 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1211 data
= g_strdup (value
);
1213 change
= get_change (context
, G_OPTION_ARG_FILENAME
,
1215 g_free (change
->allocated
.str
);
1217 change
->prev
.str
= *(gchar
**)entry
->arg_data
;
1218 change
->allocated
.str
= data
;
1220 *(gchar
**)entry
->arg_data
= data
;
1224 case G_OPTION_ARG_FILENAME_ARRAY
:
1229 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1234 data
= g_strdup (value
);
1236 change
= get_change (context
, G_OPTION_ARG_STRING_ARRAY
,
1239 if (change
->allocated
.array
.len
== 0)
1241 change
->prev
.array
= *(gchar
***)entry
->arg_data
;
1242 change
->allocated
.array
.data
= g_new (gchar
*, 2);
1245 change
->allocated
.array
.data
=
1246 g_renew (gchar
*, change
->allocated
.array
.data
,
1247 change
->allocated
.array
.len
+ 2);
1249 change
->allocated
.array
.data
[change
->allocated
.array
.len
] = data
;
1250 change
->allocated
.array
.data
[change
->allocated
.array
.len
+ 1] = NULL
;
1252 change
->allocated
.array
.len
++;
1254 *(gchar
***)entry
->arg_data
= change
->allocated
.array
.data
;
1259 case G_OPTION_ARG_INT
:
1263 if (!parse_int (option_name
, value
,
1268 change
= get_change (context
, G_OPTION_ARG_INT
,
1270 change
->prev
.integer
= *(gint
*)entry
->arg_data
;
1271 *(gint
*)entry
->arg_data
= data
;
1274 case G_OPTION_ARG_CALLBACK
:
1279 if (!value
&& entry
->flags
& G_OPTION_FLAG_OPTIONAL_ARG
)
1281 else if (entry
->flags
& G_OPTION_FLAG_NO_ARG
)
1283 else if (entry
->flags
& G_OPTION_FLAG_FILENAME
)
1286 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1288 data
= g_strdup (value
);
1292 data
= g_locale_to_utf8 (value
, -1, NULL
, NULL
, error
);
1294 if (!(entry
->flags
& (G_OPTION_FLAG_NO_ARG
|G_OPTION_FLAG_OPTIONAL_ARG
)) &&
1298 retval
= (* (GOptionArgFunc
) entry
->arg_data
) (option_name
, data
, group
->user_data
, error
);
1300 if (!retval
&& error
!= NULL
&& *error
== NULL
)
1302 G_OPTION_ERROR
, G_OPTION_ERROR_FAILED
,
1303 _("Error parsing option %s"), option_name
);
1311 case G_OPTION_ARG_DOUBLE
:
1315 if (!parse_double (option_name
, value
,
1322 change
= get_change (context
, G_OPTION_ARG_DOUBLE
,
1324 change
->prev
.dbl
= *(gdouble
*)entry
->arg_data
;
1325 *(gdouble
*)entry
->arg_data
= data
;
1328 case G_OPTION_ARG_INT64
:
1332 if (!parse_int64 (option_name
, value
,
1339 change
= get_change (context
, G_OPTION_ARG_INT64
,
1341 change
->prev
.int64
= *(gint64
*)entry
->arg_data
;
1342 *(gint64
*)entry
->arg_data
= data
;
1346 g_assert_not_reached ();
1353 parse_short_option (GOptionContext
*context
,
1354 GOptionGroup
*group
,
1365 for (j
= 0; j
< group
->n_entries
; j
++)
1367 if (arg
== group
->entries
[j
].short_name
)
1370 gchar
*value
= NULL
;
1372 option_name
= g_strdup_printf ("-%c", group
->entries
[j
].short_name
);
1374 if (NO_ARG (&group
->entries
[j
]))
1381 G_OPTION_ERROR
, G_OPTION_ERROR_FAILED
,
1382 _("Error parsing option %s"), option_name
);
1383 g_free (option_name
);
1387 if (idx
< *argc
- 1)
1389 if (!OPTIONAL_ARG (&group
->entries
[j
]))
1391 value
= (*argv
)[idx
+ 1];
1392 add_pending_null (context
, &((*argv
)[idx
+ 1]), NULL
);
1397 if ((*argv
)[idx
+ 1][0] == '-')
1401 value
= (*argv
)[idx
+ 1];
1402 add_pending_null (context
, &((*argv
)[idx
+ 1]), NULL
);
1407 else if (idx
>= *argc
- 1 && OPTIONAL_ARG (&group
->entries
[j
]))
1412 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1413 _("Missing argument for %s"), option_name
);
1414 g_free (option_name
);
1419 if (!parse_arg (context
, group
, &group
->entries
[j
],
1420 value
, option_name
, error
))
1422 g_free (option_name
);
1426 g_free (option_name
);
1435 parse_long_option (GOptionContext
*context
,
1436 GOptionGroup
*group
,
1447 for (j
= 0; j
< group
->n_entries
; j
++)
1452 if (aliased
&& (group
->entries
[j
].flags
& G_OPTION_FLAG_NOALIAS
))
1455 if (NO_ARG (&group
->entries
[j
]) &&
1456 strcmp (arg
, group
->entries
[j
].long_name
) == 0)
1461 option_name
= g_strconcat ("--", group
->entries
[j
].long_name
, NULL
);
1462 retval
= parse_arg (context
, group
, &group
->entries
[j
],
1463 NULL
, option_name
, error
);
1464 g_free (option_name
);
1466 add_pending_null (context
, &((*argv
)[*idx
]), NULL
);
1473 gint len
= strlen (group
->entries
[j
].long_name
);
1475 if (strncmp (arg
, group
->entries
[j
].long_name
, len
) == 0 &&
1476 (arg
[len
] == '=' || arg
[len
] == 0))
1478 gchar
*value
= NULL
;
1481 add_pending_null (context
, &((*argv
)[*idx
]), NULL
);
1482 option_name
= g_strconcat ("--", group
->entries
[j
].long_name
, NULL
);
1484 if (arg
[len
] == '=')
1485 value
= arg
+ len
+ 1;
1486 else if (*idx
< *argc
- 1)
1488 if (!OPTIONAL_ARG (&group
->entries
[j
]))
1490 value
= (*argv
)[*idx
+ 1];
1491 add_pending_null (context
, &((*argv
)[*idx
+ 1]), NULL
);
1496 if ((*argv
)[*idx
+ 1][0] == '-')
1499 retval
= parse_arg (context
, group
, &group
->entries
[j
],
1500 NULL
, option_name
, error
);
1502 g_free (option_name
);
1507 value
= (*argv
)[*idx
+ 1];
1508 add_pending_null (context
, &((*argv
)[*idx
+ 1]), NULL
);
1513 else if (*idx
>= *argc
- 1 && OPTIONAL_ARG (&group
->entries
[j
]))
1516 retval
= parse_arg (context
, group
, &group
->entries
[j
],
1517 NULL
, option_name
, error
);
1519 g_free (option_name
);
1525 G_OPTION_ERROR
, G_OPTION_ERROR_BAD_VALUE
,
1526 _("Missing argument for %s"), option_name
);
1527 g_free (option_name
);
1531 if (!parse_arg (context
, group
, &group
->entries
[j
],
1532 value
, option_name
, error
))
1534 g_free (option_name
);
1538 g_free (option_name
);
1548 parse_remaining_arg (GOptionContext
*context
,
1549 GOptionGroup
*group
,
1558 for (j
= 0; j
< group
->n_entries
; j
++)
1563 if (group
->entries
[j
].long_name
[0])
1566 g_return_val_if_fail (group
->entries
[j
].arg
== G_OPTION_ARG_CALLBACK
||
1567 group
->entries
[j
].arg
== G_OPTION_ARG_STRING_ARRAY
||
1568 group
->entries
[j
].arg
== G_OPTION_ARG_FILENAME_ARRAY
, FALSE
);
1570 add_pending_null (context
, &((*argv
)[*idx
]), NULL
);
1572 if (!parse_arg (context
, group
, &group
->entries
[j
], (*argv
)[*idx
], "", error
))
1583 free_changes_list (GOptionContext
*context
,
1588 for (list
= context
->changes
; list
!= NULL
; list
= list
->next
)
1590 Change
*change
= list
->data
;
1594 switch (change
->arg_type
)
1596 case G_OPTION_ARG_NONE
:
1597 *(gboolean
*)change
->arg_data
= change
->prev
.bool;
1599 case G_OPTION_ARG_INT
:
1600 *(gint
*)change
->arg_data
= change
->prev
.integer
;
1602 case G_OPTION_ARG_STRING
:
1603 case G_OPTION_ARG_FILENAME
:
1604 g_free (change
->allocated
.str
);
1605 *(gchar
**)change
->arg_data
= change
->prev
.str
;
1607 case G_OPTION_ARG_STRING_ARRAY
:
1608 case G_OPTION_ARG_FILENAME_ARRAY
:
1609 g_strfreev (change
->allocated
.array
.data
);
1610 *(gchar
***)change
->arg_data
= change
->prev
.array
;
1612 case G_OPTION_ARG_DOUBLE
:
1613 *(gdouble
*)change
->arg_data
= change
->prev
.dbl
;
1615 case G_OPTION_ARG_INT64
:
1616 *(gint64
*)change
->arg_data
= change
->prev
.int64
;
1619 g_assert_not_reached ();
1626 g_list_free (context
->changes
);
1627 context
->changes
= NULL
;
1631 free_pending_nulls (GOptionContext
*context
,
1632 gboolean perform_nulls
)
1636 for (list
= context
->pending_nulls
; list
!= NULL
; list
= list
->next
)
1638 PendingNull
*n
= list
->data
;
1644 /* Copy back the short options */
1646 strcpy (*n
->ptr
+ 1, n
->value
);
1656 g_list_free (context
->pending_nulls
);
1657 context
->pending_nulls
= NULL
;
1660 /* Use a platform-specific mechanism to look up the first argument to
1661 * the current process.
1662 * Note if you implement this for other platforms, also add it to
1663 * tests/option-argv0.c
1666 platform_get_argv0 (void)
1673 if (!g_file_get_contents ("/proc/self/cmdline",
1678 /* Sanity check for a NUL terminator. */
1679 if (!memchr (cmdline
, 0, len
))
1681 /* We could just return cmdline, but I think it's better
1682 * to hold on to a smaller malloc block; the arguments
1685 base_arg0
= g_path_get_basename (cmdline
);
1694 * g_option_context_parse:
1695 * @context: a #GOptionContext
1696 * @argc: a pointer to the number of command line arguments
1697 * @argv: a pointer to the array of command line arguments
1698 * @error: a return location for errors
1700 * Parses the command line arguments, recognizing options
1701 * which have been added to @context. A side-effect of
1702 * calling this function is that g_set_prgname() will be
1705 * If the parsing is successful, any parsed arguments are
1706 * removed from the array and @argc and @argv are updated
1707 * accordingly. A '--' option is stripped from @argv
1708 * unless there are unparsed options before and after it,
1709 * or some of the options after it start with '-'. In case
1710 * of an error, @argc and @argv are left unmodified.
1712 * If automatic <option>--help</option> support is enabled
1713 * (see g_option_context_set_help_enabled()), and the
1714 * @argv array contains one of the recognized help options,
1715 * this function will produce help output to stdout and
1716 * call <literal>exit (0)</literal>.
1718 * Note that function depends on the
1719 * <link linkend="setlocale">current locale</link> for
1720 * automatic character set conversion of string and filename
1723 * Return value: %TRUE if the parsing was successful,
1724 * %FALSE if an error occurred
1729 g_option_context_parse (GOptionContext
*context
,
1737 /* Set program name */
1738 if (!g_get_prgname())
1742 if (argc
&& argv
&& *argc
)
1743 prgname
= g_path_get_basename ((*argv
)[0]);
1745 prgname
= platform_get_argv0 ();
1748 g_set_prgname (prgname
);
1750 g_set_prgname ("<unknown>");
1755 /* Call pre-parse hooks */
1756 list
= context
->groups
;
1759 GOptionGroup
*group
= list
->data
;
1761 if (group
->pre_parse_func
)
1763 if (!(* group
->pre_parse_func
) (context
, group
,
1764 group
->user_data
, error
))
1771 if (context
->main_group
&& context
->main_group
->pre_parse_func
)
1773 if (!(* context
->main_group
->pre_parse_func
) (context
, context
->main_group
,
1774 context
->main_group
->user_data
, error
))
1780 gboolean stop_parsing
= FALSE
;
1781 gboolean has_unknown
= FALSE
;
1782 gint separator_pos
= 0;
1784 for (i
= 1; i
< *argc
; i
++)
1787 gboolean parsed
= FALSE
;
1789 if ((*argv
)[i
][0] == '-' && (*argv
)[i
][1] != '\0' && !stop_parsing
)
1791 if ((*argv
)[i
][1] == '-')
1795 arg
= (*argv
)[i
] + 2;
1797 /* '--' terminates list of arguments */
1801 stop_parsing
= TRUE
;
1805 /* Handle help options */
1806 if (context
->help_enabled
)
1808 if (strcmp (arg
, "help") == 0)
1809 print_help (context
, TRUE
, NULL
);
1810 else if (strcmp (arg
, "help-all") == 0)
1811 print_help (context
, FALSE
, NULL
);
1812 else if (strncmp (arg
, "help-", 5) == 0)
1814 list
= context
->groups
;
1818 GOptionGroup
*group
= list
->data
;
1820 if (strcmp (arg
+ 5, group
->name
) == 0)
1821 print_help (context
, FALSE
, group
);
1828 if (context
->main_group
&&
1829 !parse_long_option (context
, context
->main_group
, &i
, arg
,
1830 FALSE
, argc
, argv
, error
, &parsed
))
1836 /* Try the groups */
1837 list
= context
->groups
;
1840 GOptionGroup
*group
= list
->data
;
1842 if (!parse_long_option (context
, group
, &i
, arg
,
1843 FALSE
, argc
, argv
, error
, &parsed
))
1855 /* Now look for --<group>-<option> */
1856 dash
= strchr (arg
, '-');
1859 /* Try the groups */
1860 list
= context
->groups
;
1863 GOptionGroup
*group
= list
->data
;
1865 if (strncmp (group
->name
, arg
, dash
- arg
) == 0)
1867 if (!parse_long_option (context
, group
, &i
, dash
+ 1,
1868 TRUE
, argc
, argv
, error
, &parsed
))
1879 if (context
->ignore_unknown
)
1883 { /* short option */
1884 gint new_i
= i
, arg_length
;
1885 gboolean
*nulled_out
= NULL
;
1886 gboolean has_h_entry
= context_has_h_entry (context
);
1887 arg
= (*argv
)[i
] + 1;
1888 arg_length
= strlen (arg
);
1889 nulled_out
= g_newa (gboolean
, arg_length
);
1890 memset (nulled_out
, 0, arg_length
* sizeof (gboolean
));
1891 for (j
= 0; j
< arg_length
; j
++)
1893 if (context
->help_enabled
&& (arg
[j
] == '?' ||
1894 (arg
[j
] == 'h' && !has_h_entry
)))
1895 print_help (context
, TRUE
, NULL
);
1897 if (context
->main_group
&&
1898 !parse_short_option (context
, context
->main_group
,
1900 argc
, argv
, error
, &parsed
))
1904 /* Try the groups */
1905 list
= context
->groups
;
1908 GOptionGroup
*group
= list
->data
;
1909 if (!parse_short_option (context
, group
, i
, &new_i
, arg
[j
],
1910 argc
, argv
, error
, &parsed
))
1918 if (context
->ignore_unknown
&& parsed
)
1919 nulled_out
[j
] = TRUE
;
1920 else if (context
->ignore_unknown
)
1924 /* !context->ignore_unknown && parsed */
1926 if (context
->ignore_unknown
)
1928 gchar
*new_arg
= NULL
;
1930 for (j
= 0; j
< arg_length
; j
++)
1935 new_arg
= g_malloc (arg_length
+ 1);
1936 new_arg
[arg_index
++] = arg
[j
];
1940 new_arg
[arg_index
] = '\0';
1941 add_pending_null (context
, &((*argv
)[i
]), new_arg
);
1945 add_pending_null (context
, &((*argv
)[i
]), NULL
);
1953 if (!parsed
&& !context
->ignore_unknown
)
1956 G_OPTION_ERROR
, G_OPTION_ERROR_UNKNOWN_OPTION
,
1957 _("Unknown option %s"), (*argv
)[i
]);
1963 /* Collect remaining args */
1964 if (context
->main_group
&&
1965 !parse_remaining_arg (context
, context
->main_group
, &i
,
1966 argc
, argv
, error
, &parsed
))
1969 if (!parsed
&& (has_unknown
|| (*argv
)[i
][0] == '-'))
1974 if (separator_pos
> 0)
1975 add_pending_null (context
, &((*argv
)[separator_pos
]), NULL
);
1979 /* Call post-parse hooks */
1980 list
= context
->groups
;
1983 GOptionGroup
*group
= list
->data
;
1985 if (group
->post_parse_func
)
1987 if (!(* group
->post_parse_func
) (context
, group
,
1988 group
->user_data
, error
))
1995 if (context
->main_group
&& context
->main_group
->post_parse_func
)
1997 if (!(* context
->main_group
->post_parse_func
) (context
, context
->main_group
,
1998 context
->main_group
->user_data
, error
))
2004 free_pending_nulls (context
, TRUE
);
2006 for (i
= 1; i
< *argc
; i
++)
2008 for (k
= i
; k
< *argc
; k
++)
2009 if ((*argv
)[k
] != NULL
)
2015 for (j
= i
+ k
; j
< *argc
; j
++)
2017 (*argv
)[j
-k
] = (*argv
)[j
];
2029 /* Call error hooks */
2030 list
= context
->groups
;
2033 GOptionGroup
*group
= list
->data
;
2035 if (group
->error_func
)
2036 (* group
->error_func
) (context
, group
,
2037 group
->user_data
, error
);
2042 if (context
->main_group
&& context
->main_group
->error_func
)
2043 (* context
->main_group
->error_func
) (context
, context
->main_group
,
2044 context
->main_group
->user_data
, error
);
2046 free_changes_list (context
, TRUE
);
2047 free_pending_nulls (context
, FALSE
);
2053 * g_option_group_new:
2054 * @name: the name for the option group, this is used to provide
2055 * help for the options in this group with <option>--help-</option>@name
2056 * @description: a description for this group to be shown in
2057 * <option>--help</option>. This string is translated using the translation
2058 * domain or translation function of the group
2059 * @help_description: a description for the <option>--help-</option>@name option.
2060 * This string is translated using the translation domain or translation function
2062 * @user_data: user data that will be passed to the pre- and post-parse hooks,
2063 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
2064 * @destroy: a function that will be called to free @user_data, or %NULL
2066 * Creates a new #GOptionGroup.
2068 * Return value: a newly created option group. It should be added
2069 * to a #GOptionContext or freed with g_option_group_free().
2074 g_option_group_new (const gchar
*name
,
2075 const gchar
*description
,
2076 const gchar
*help_description
,
2078 GDestroyNotify destroy
)
2081 GOptionGroup
*group
;
2083 group
= g_new0 (GOptionGroup
, 1);
2084 group
->name
= g_strdup (name
);
2085 group
->description
= g_strdup (description
);
2086 group
->help_description
= g_strdup (help_description
);
2087 group
->user_data
= user_data
;
2088 group
->destroy_notify
= destroy
;
2095 * g_option_group_free:
2096 * @group: a #GOptionGroup
2098 * Frees a #GOptionGroup. Note that you must <emphasis>not</emphasis>
2099 * free groups which have been added to a #GOptionContext.
2104 g_option_group_free (GOptionGroup
*group
)
2106 g_return_if_fail (group
!= NULL
);
2108 g_free (group
->name
);
2109 g_free (group
->description
);
2110 g_free (group
->help_description
);
2112 g_free (group
->entries
);
2114 if (group
->destroy_notify
)
2115 (* group
->destroy_notify
) (group
->user_data
);
2117 if (group
->translate_notify
)
2118 (* group
->translate_notify
) (group
->translate_data
);
2125 * g_option_group_add_entries:
2126 * @group: a #GOptionGroup
2127 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
2129 * Adds the options specified in @entries to @group.
2134 g_option_group_add_entries (GOptionGroup
*group
,
2135 const GOptionEntry
*entries
)
2139 g_return_if_fail (entries
!= NULL
);
2141 for (n_entries
= 0; entries
[n_entries
].long_name
!= NULL
; n_entries
++) ;
2143 group
->entries
= g_renew (GOptionEntry
, group
->entries
, group
->n_entries
+ n_entries
);
2145 memcpy (group
->entries
+ group
->n_entries
, entries
, sizeof (GOptionEntry
) * n_entries
);
2147 for (i
= group
->n_entries
; i
< group
->n_entries
+ n_entries
; i
++)
2149 gchar c
= group
->entries
[i
].short_name
;
2151 if (c
== '-' || (c
!= 0 && !g_ascii_isprint (c
)))
2153 g_warning (G_STRLOC
": ignoring invalid short option '%c' (%d)", c
, c
);
2154 group
->entries
[i
].short_name
= 0;
2157 if (group
->entries
[i
].arg
!= G_OPTION_ARG_NONE
&&
2158 (group
->entries
[i
].flags
& G_OPTION_FLAG_REVERSE
) != 0)
2160 g_warning (G_STRLOC
": ignoring reverse flag on option of type %d", group
->entries
[i
].arg
);
2162 group
->entries
[i
].flags
&= ~G_OPTION_FLAG_REVERSE
;
2165 if (group
->entries
[i
].arg
!= G_OPTION_ARG_CALLBACK
&&
2166 (group
->entries
[i
].flags
& (G_OPTION_FLAG_NO_ARG
|G_OPTION_FLAG_OPTIONAL_ARG
|G_OPTION_FLAG_FILENAME
)) != 0)
2168 g_warning (G_STRLOC
": ignoring no-arg, optional-arg or filename flags (%d) on option of type %d", group
->entries
[i
].flags
, group
->entries
[i
].arg
);
2170 group
->entries
[i
].flags
&= ~(G_OPTION_FLAG_NO_ARG
|G_OPTION_FLAG_OPTIONAL_ARG
|G_OPTION_FLAG_FILENAME
);
2174 group
->n_entries
+= n_entries
;
2178 * g_option_group_set_parse_hooks:
2179 * @group: a #GOptionGroup
2180 * @pre_parse_func: a function to call before parsing, or %NULL
2181 * @post_parse_func: a function to call after parsing, or %NULL
2183 * Associates two functions with @group which will be called
2184 * from g_option_context_parse() before the first option is parsed
2185 * and after the last option has been parsed, respectively.
2187 * Note that the user data to be passed to @pre_parse_func and
2188 * @post_parse_func can be specified when constructing the group
2189 * with g_option_group_new().
2194 g_option_group_set_parse_hooks (GOptionGroup
*group
,
2195 GOptionParseFunc pre_parse_func
,
2196 GOptionParseFunc post_parse_func
)
2198 g_return_if_fail (group
!= NULL
);
2200 group
->pre_parse_func
= pre_parse_func
;
2201 group
->post_parse_func
= post_parse_func
;
2205 * g_option_group_set_error_hook:
2206 * @group: a #GOptionGroup
2207 * @error_func: a function to call when an error occurs
2209 * Associates a function with @group which will be called
2210 * from g_option_context_parse() when an error occurs.
2212 * Note that the user data to be passed to @error_func can be
2213 * specified when constructing the group with g_option_group_new().
2218 g_option_group_set_error_hook (GOptionGroup
*group
,
2219 GOptionErrorFunc error_func
)
2221 g_return_if_fail (group
!= NULL
);
2223 group
->error_func
= error_func
;
2228 * g_option_group_set_translate_func:
2229 * @group: a #GOptionGroup
2230 * @func: the #GTranslateFunc, or %NULL
2231 * @data: user data to pass to @func, or %NULL
2232 * @destroy_notify: a function which gets called to free @data, or %NULL
2234 * Sets the function which is used to translate user-visible
2235 * strings, for <option>--help</option> output. Different
2236 * groups can use different #GTranslateFunc<!-- -->s. If @func
2237 * is %NULL, strings are not translated.
2239 * If you are using gettext(), you only need to set the translation
2240 * domain, see g_option_group_set_translation_domain().
2245 g_option_group_set_translate_func (GOptionGroup
*group
,
2246 GTranslateFunc func
,
2248 GDestroyNotify destroy_notify
)
2250 g_return_if_fail (group
!= NULL
);
2252 if (group
->translate_notify
)
2253 group
->translate_notify (group
->translate_data
);
2255 group
->translate_func
= func
;
2256 group
->translate_data
= data
;
2257 group
->translate_notify
= destroy_notify
;
2260 static const gchar
*
2261 dgettext_swapped (const gchar
*msgid
,
2262 const gchar
*domainname
)
2264 return g_dgettext (domainname
, msgid
);
2268 * g_option_group_set_translation_domain:
2269 * @group: a #GOptionGroup
2270 * @domain: the domain to use
2272 * A convenience function to use gettext() for translating
2273 * user-visible strings.
2278 g_option_group_set_translation_domain (GOptionGroup
*group
,
2279 const gchar
*domain
)
2281 g_return_if_fail (group
!= NULL
);
2283 g_option_group_set_translate_func (group
,
2284 (GTranslateFunc
)dgettext_swapped
,
2290 * g_option_context_set_translate_func:
2291 * @context: a #GOptionContext
2292 * @func: the #GTranslateFunc, or %NULL
2293 * @data: user data to pass to @func, or %NULL
2294 * @destroy_notify: a function which gets called to free @data, or %NULL
2296 * Sets the function which is used to translate the contexts
2297 * user-visible strings, for <option>--help</option> output.
2298 * If @func is %NULL, strings are not translated.
2300 * Note that option groups have their own translation functions,
2301 * this function only affects the @parameter_string (see g_option_context_new()),
2302 * the summary (see g_option_context_set_summary()) and the description
2303 * (see g_option_context_set_description()).
2305 * If you are using gettext(), you only need to set the translation
2306 * domain, see g_option_context_set_translation_domain().
2311 g_option_context_set_translate_func (GOptionContext
*context
,
2312 GTranslateFunc func
,
2314 GDestroyNotify destroy_notify
)
2316 g_return_if_fail (context
!= NULL
);
2318 if (context
->translate_notify
)
2319 context
->translate_notify (context
->translate_data
);
2321 context
->translate_func
= func
;
2322 context
->translate_data
= data
;
2323 context
->translate_notify
= destroy_notify
;
2327 * g_option_context_set_translation_domain:
2328 * @context: a #GOptionContext
2329 * @domain: the domain to use
2331 * A convenience function to use gettext() for translating
2332 * user-visible strings.
2337 g_option_context_set_translation_domain (GOptionContext
*context
,
2338 const gchar
*domain
)
2340 g_return_if_fail (context
!= NULL
);
2342 g_option_context_set_translate_func (context
,
2343 (GTranslateFunc
)dgettext_swapped
,
2349 * g_option_context_set_summary:
2350 * @context: a #GOptionContext
2351 * @summary: a string to be shown in <option>--help</option> output
2352 * before the list of options, or %NULL
2354 * Adds a string to be displayed in <option>--help</option> output
2355 * before the list of options. This is typically a summary of the
2356 * program functionality.
2358 * Note that the summary is translated (see
2359 * g_option_context_set_translate_func() and
2360 * g_option_context_set_translation_domain()).
2365 g_option_context_set_summary (GOptionContext
*context
,
2366 const gchar
*summary
)
2368 g_return_if_fail (context
!= NULL
);
2370 g_free (context
->summary
);
2371 context
->summary
= g_strdup (summary
);
2376 * g_option_context_get_summary:
2377 * @context: a #GOptionContext
2379 * Returns the summary. See g_option_context_set_summary().
2381 * Returns: the summary
2385 G_CONST_RETURN gchar
*
2386 g_option_context_get_summary (GOptionContext
*context
)
2388 g_return_val_if_fail (context
!= NULL
, NULL
);
2390 return context
->summary
;
2394 * g_option_context_set_description:
2395 * @context: a #GOptionContext
2396 * @description: a string to be shown in <option>--help</option> output
2397 * after the list of options, or %NULL
2399 * Adds a string to be displayed in <option>--help</option> output
2400 * after the list of options. This text often includes a bug reporting
2403 * Note that the summary is translated (see
2404 * g_option_context_set_translate_func()).
2409 g_option_context_set_description (GOptionContext
*context
,
2410 const gchar
*description
)
2412 g_return_if_fail (context
!= NULL
);
2414 g_free (context
->description
);
2415 context
->description
= g_strdup (description
);
2420 * g_option_context_get_description:
2421 * @context: a #GOptionContext
2423 * Returns the description. See g_option_context_set_description().
2425 * Returns: the description
2429 G_CONST_RETURN gchar
*
2430 g_option_context_get_description (GOptionContext
*context
)
2432 g_return_val_if_fail (context
!= NULL
, NULL
);
2434 return context
->description
;