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.
23 * @Short_description: parses commandline options
24 * @Title: Commandline option parser
26 * The GOption commandline parser is intended to be a simpler replacement for the
27 * popt library. It supports short and long commandline options, as shown in the
31 * <literal>testtreemodel -r 1 --max-size 20 --rand --display=:1.0 -vb -- file1 file2</literal>
34 * The example demonstrates a number of features of the GOption commandline parser
36 * Options can be single letters, prefixed by a single dash. Multiple
37 * short options can be grouped behind a single dash.
39 * Long options are prefixed by two consecutive dashes.
41 * Options can have an extra argument, which can be a number, a string or a
42 * filename. For long options, the extra argument can be appended with an
43 * equals sign after the option name.
45 * Non-option arguments are returned to the application as rest arguments.
47 * An argument consisting solely of two dashes turns off further parsing,
48 * any remaining arguments (even those starting with a dash) are returned
49 * to the application as rest arguments.
54 * Another important feature of GOption is that it can automatically generate
55 * nicely formatted help output. Unless it is explicitly turned off with
56 * g_option_context_set_help_enabled(), GOption will recognize the
57 * <option>--help</option>, <option>-?</option>, <option>--help-all</option>
58 * and <option>--help-</option><replaceable>groupname</replaceable> options
59 * (where <replaceable>groupname</replaceable> is the name of a #GOptionGroup)
60 * and write a text similar to the one shown in the following example to stdout.
63 * <informalexample><screen>
65 * testtreemodel [OPTION...] - test tree model performance
68 * -?, --help Show help options
69 * --help-all Show all help options
70 * --help-gtk Show GTK+ Options
72 * Application Options:
73 * -r, --repeats=N Average over N repetitions
74 * -m, --max-size=M Test up to 2^M items
75 * --display=DISPLAY X display to use
76 * -v, --verbose Be verbose
77 * -b, --beep Beep when done
78 * --rand Randomize the data
79 * </screen></informalexample>
81 * GOption groups options in #GOptionGroup<!-- -->s, which makes it easy to
82 * incorporate options from multiple sources. The intended use for this is
83 * to let applications collect option groups from the libraries it uses,
84 * add them to their #GOptionContext, and parse all options by a single call
85 * 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 UTF-8,
90 * filenames are returned in the GLib filename encoding. Note that this only
91 * works if setlocale() has been called before 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>
139 #include "glibintl.h"
149 #define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
151 #define NO_ARG(entry) ((entry)->arg == G_OPTION_ARG_NONE || \
152 ((entry)->arg == G_OPTION_ARG_CALLBACK && \
153 ((entry)->flags & G_OPTION_FLAG_NO_ARG)))
155 #define OPTIONAL_ARG(entry) ((entry)->arg == G_OPTION_ARG_CALLBACK && \
156 (entry)->flags & G_OPTION_FLAG_OPTIONAL_ARG)
188 struct _GOptionContext
192 gchar *parameter_string;
196 GTranslateFunc translate_func;
197 GDestroyNotify translate_notify;
198 gpointer translate_data;
200 guint help_enabled : 1;
201 guint ignore_unknown : 1;
203 GOptionGroup *main_group;
205 /* We keep a list of change so we can revert them */
208 /* We also keep track of all argv elements
209 * that should be NULLed or modified.
211 GList *pending_nulls;
218 gchar *help_description;
220 GDestroyNotify destroy_notify;
223 GTranslateFunc translate_func;
224 GDestroyNotify translate_notify;
225 gpointer translate_data;
227 GOptionEntry *entries;
230 GOptionParseFunc pre_parse_func;
231 GOptionParseFunc post_parse_func;
232 GOptionErrorFunc error_func;
235 static void free_changes_list (GOptionContext *context,
237 static void free_pending_nulls (GOptionContext *context,
238 gboolean perform_nulls);
242 _g_unichar_get_width (gunichar c)
244 if (G_UNLIKELY (g_unichar_iszerowidth (c)))
247 /* we ignore the fact that we should call g_unichar_iswide_cjk() under
248 * some locales (legacy East Asian ones) */
249 if (g_unichar_iswide (c))
256 _g_utf8_strwidth (const gchar *p,
260 const gchar *start = p;
261 g_return_val_if_fail (p != NULL || max == 0, 0);
267 len += _g_unichar_get_width (g_utf8_get_char (p));
268 p = g_utf8_next_char (p);
276 /* this case may not be quite correct */
278 len += _g_unichar_get_width (g_utf8_get_char (p));
279 p = g_utf8_next_char (p);
281 while (p - start < max && *p)
283 len += _g_unichar_get_width (g_utf8_get_char (p));
284 p = g_utf8_next_char (p);
293 g_option_error_quark (void)
295 return g_quark_from_static_string ("g-option-context-error-quark");
299 * g_option_context_new:
300 * @parameter_string: a string which is displayed in
301 * the first line of <option>--help</option> output, after the
303 * <literal><replaceable>programname</replaceable> [OPTION...]</literal>
305 * Creates a new option context.
307 * The @parameter_string can serve multiple purposes. It can be used
308 * to add descriptions for "rest" arguments, which are not parsed by
309 * the #GOptionContext, typically something like "FILES" or
310 * "FILE1 FILE2...". If you are using #G_OPTION_REMAINING for
311 * collecting "rest" arguments, GLib handles this automatically by
312 * using the @arg_description of the corresponding #GOptionEntry in
315 * Another usage is to give a short summary of the program
316 * functionality, like " - frob the strings", which will be displayed
317 * in the same line as the usage. For a longer description of the
318 * program functionality that should be displayed as a paragraph
319 * below the usage line, use g_option_context_set_summary().
321 * Note that the @parameter_string is translated using the
322 * function set with g_option_context_set_translate_func(), so
323 * it should normally be passed untranslated.
325 * Returns: a newly created #GOptionContext, which must be
326 * freed with g_option_context_free() after use.
331 g_option_context_new (const gchar *parameter_string)
334 GOptionContext *context;
336 context = g_new0 (GOptionContext, 1);
338 context->parameter_string = g_strdup (parameter_string);
339 context->help_enabled = TRUE;
340 context->ignore_unknown = FALSE;
346 * g_option_context_free:
347 * @context: a #GOptionContext
349 * Frees context and all the groups which have been
354 void g_option_context_free (GOptionContext *context)
356 g_return_if_fail (context != NULL);
358 g_list_foreach (context->groups, (GFunc)g_option_group_free, NULL);
359 g_list_free (context->groups);
361 if (context->main_group)
362 g_option_group_free (context->main_group);
364 free_changes_list (context, FALSE);
365 free_pending_nulls (context, FALSE);
367 g_free (context->parameter_string);
368 g_free (context->summary);
369 g_free (context->description);
371 if (context->translate_notify)
372 (* context->translate_notify) (context->translate_data);
379 * g_option_context_set_help_enabled:
380 * @context: a #GOptionContext
381 * @help_enabled: %TRUE to enable <option>--help</option>, %FALSE to disable it
383 * Enables or disables automatic generation of <option>--help</option>
384 * output. By default, g_option_context_parse() recognizes
385 * <option>--help</option>, <option>-?</option>, <option>--help-all</option>
386 * and <option>--help-</option><replaceable>groupname</replaceable> and creates
387 * suitable output to stdout.
391 void g_option_context_set_help_enabled (GOptionContext *context,
392 gboolean help_enabled)
395 g_return_if_fail (context != NULL);
397 context->help_enabled = help_enabled;
401 * g_option_context_get_help_enabled:
402 * @context: a #GOptionContext
404 * Returns whether automatic <option>--help</option> generation
405 * is turned on for @context. See g_option_context_set_help_enabled().
407 * Returns: %TRUE if automatic help generation is turned on.
412 g_option_context_get_help_enabled (GOptionContext *context)
414 g_return_val_if_fail (context != NULL, FALSE);
416 return context->help_enabled;
420 * g_option_context_set_ignore_unknown_options:
421 * @context: a #GOptionContext
422 * @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
423 * an error when unknown options are met
425 * Sets whether to ignore unknown options or not. If an argument is
426 * ignored, it is left in the @argv array after parsing. By default,
427 * g_option_context_parse() treats unknown options as error.
429 * This setting does not affect non-option arguments (i.e. arguments
430 * which don't start with a dash). But note that GOption cannot reliably
431 * determine whether a non-option belongs to a preceding unknown option.
436 g_option_context_set_ignore_unknown_options (GOptionContext *context,
437 gboolean ignore_unknown)
439 g_return_if_fail (context != NULL);
441 context->ignore_unknown = ignore_unknown;
445 * g_option_context_get_ignore_unknown_options:
446 * @context: a #GOptionContext
448 * Returns whether unknown options are ignored or not. See
449 * g_option_context_set_ignore_unknown_options().
451 * Returns: %TRUE if unknown options are ignored.
456 g_option_context_get_ignore_unknown_options (GOptionContext *context)
458 g_return_val_if_fail (context != NULL, FALSE);
460 return context->ignore_unknown;
464 * g_option_context_add_group:
465 * @context: a #GOptionContext
466 * @group: the group to add
468 * Adds a #GOptionGroup to the @context, so that parsing with @context
469 * will recognize the options in the group. Note that the group will
470 * be freed together with the context when g_option_context_free() is
471 * called, so you must not free the group yourself after adding it
477 g_option_context_add_group (GOptionContext *context,
482 g_return_if_fail (context != NULL);
483 g_return_if_fail (group != NULL);
484 g_return_if_fail (group->name != NULL);
485 g_return_if_fail (group->description != NULL);
486 g_return_if_fail (group->help_description != NULL);
488 for (list = context->groups; list; list = list->next)
490 GOptionGroup *g = (GOptionGroup *)list->data;
492 if ((group->name == NULL && g->name == NULL) ||
493 (group->name && g->name && strcmp (group->name, g->name) == 0))
494 g_warning ("A group named \"%s\" is already part of this GOptionContext",
498 context->groups = g_list_append (context->groups, group);
502 * g_option_context_set_main_group:
503 * @context: a #GOptionContext
504 * @group: the group to set as main group
506 * Sets a #GOptionGroup as main group of the @context.
507 * This has the same effect as calling g_option_context_add_group(),
508 * the only difference is that the options in the main group are
509 * treated differently when generating <option>--help</option> output.
514 g_option_context_set_main_group (GOptionContext *context,
517 g_return_if_fail (context != NULL);
518 g_return_if_fail (group != NULL);
520 if (context->main_group)
522 g_warning ("This GOptionContext already has a main group");
527 context->main_group = group;
531 * g_option_context_get_main_group:
532 * @context: a #GOptionContext
534 * Returns a pointer to the main group of @context.
536 * Return value: the main group of @context, or %NULL if @context doesn't
537 * have a main group. Note that group belongs to @context and should
538 * not be modified or freed.
543 g_option_context_get_main_group (GOptionContext *context)
545 g_return_val_if_fail (context != NULL, NULL);
547 return context->main_group;
551 * g_option_context_add_main_entries:
552 * @context: a #GOptionContext
553 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
554 * @translation_domain: a translation domain to use for translating
555 * the <option>--help</option> output for the options in @entries
556 * with gettext(), or %NULL
558 * A convenience function which creates a main group if it doesn't
559 * exist, adds the @entries to it and sets the translation domain.
564 g_option_context_add_main_entries (GOptionContext *context,
565 const GOptionEntry *entries,
566 const gchar *translation_domain)
568 g_return_if_fail (entries != NULL);
570 if (!context->main_group)
571 context->main_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
573 g_option_group_add_entries (context->main_group, entries);
574 g_option_group_set_translation_domain (context->main_group, translation_domain);
578 calculate_max_length (GOptionGroup *group)
581 gint i, len, max_length;
585 for (i = 0; i < group->n_entries; i++)
587 entry = &group->entries[i];
589 if (entry->flags & G_OPTION_FLAG_HIDDEN)
592 len = _g_utf8_strwidth (entry->long_name, -1);
594 if (entry->short_name)
597 if (!NO_ARG (entry) && entry->arg_description)
598 len += 1 + _g_utf8_strwidth (TRANSLATE (group, entry->arg_description), -1);
600 max_length = MAX (max_length, len);
607 print_entry (GOptionGroup *group,
609 const GOptionEntry *entry,
614 if (entry->flags & G_OPTION_FLAG_HIDDEN)
617 if (entry->long_name[0] == 0)
620 str = g_string_new (NULL);
622 if (entry->short_name)
623 g_string_append_printf (str, " -%c, --%s", entry->short_name, entry->long_name);
625 g_string_append_printf (str, " --%s", entry->long_name);
627 if (entry->arg_description)
628 g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
630 g_string_append_printf (string, "%s%*s %s\n", str->str,
631 (int) (max_length + 4 - _g_utf8_strwidth (str->str, -1)), "",
632 entry->description ? TRANSLATE (group, entry->description) : "");
633 g_string_free (str, TRUE);
637 group_has_visible_entries (GOptionContext *context,
639 gboolean main_entries)
641 GOptionFlags reject_filter = G_OPTION_FLAG_HIDDEN;
644 gboolean main_group = group == context->main_group;
647 reject_filter |= G_OPTION_FLAG_IN_MAIN;
649 for (i = 0, l = (group ? group->n_entries : 0); i < l; i++)
651 entry = &group->entries[i];
653 if (main_entries && !main_group && !(entry->flags & G_OPTION_FLAG_IN_MAIN))
655 if (!(entry->flags & reject_filter))
663 group_list_has_visible_entires (GOptionContext *context,
665 gboolean main_entries)
669 if (group_has_visible_entries (context, group_list->data, main_entries))
672 group_list = group_list->next;
679 * g_option_context_get_help:
680 * @context: a #GOptionContext
681 * @main_help: if %TRUE, only include the main group
682 * @group: the #GOptionGroup to create help for, or %NULL
684 * Returns a formatted, translated help text for the given context.
685 * To obtain the text produced by <option>--help</option>, call
686 * <literal>g_option_context_get_help (context, TRUE, NULL)</literal>.
687 * To obtain the text produced by <option>--help-all</option>, call
688 * <literal>g_option_context_get_help (context, FALSE, NULL)</literal>.
689 * To obtain the help text for an option group, call
690 * <literal>g_option_context_get_help (context, FALSE, group)</literal>.
692 * Returns: A newly allocated string containing the help text
697 g_option_context_get_help (GOptionContext *context,
702 gint max_length, len;
705 GHashTable *shadow_map;
707 const gchar *rest_description;
710 string = g_string_sized_new (1024);
712 rest_description = NULL;
713 if (context->main_group)
716 for (i = 0; i < context->main_group->n_entries; i++)
718 entry = &context->main_group->entries[i];
719 if (entry->long_name[0] == 0)
721 rest_description = TRANSLATE (context->main_group, entry->arg_description);
727 g_string_append_printf (string, "%s\n %s %s",
728 _("Usage:"), g_get_prgname(), _("[OPTION...]"));
730 if (rest_description)
732 g_string_append (string, " ");
733 g_string_append (string, rest_description);
736 if (context->parameter_string)
738 g_string_append (string, " ");
739 g_string_append (string, TRANSLATE (context, context->parameter_string));
742 g_string_append (string, "\n\n");
744 if (context->summary)
746 g_string_append (string, TRANSLATE (context, context->summary));
747 g_string_append (string, "\n\n");
750 memset (seen, 0, sizeof (gboolean) * 256);
751 shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
753 if (context->main_group)
755 for (i = 0; i < context->main_group->n_entries; i++)
757 entry = &context->main_group->entries[i];
758 g_hash_table_insert (shadow_map,
759 (gpointer)entry->long_name,
762 if (seen[(guchar)entry->short_name])
763 entry->short_name = 0;
765 seen[(guchar)entry->short_name] = TRUE;
769 list = context->groups;
772 GOptionGroup *g = list->data;
773 for (i = 0; i < g->n_entries; i++)
775 entry = &g->entries[i];
776 if (g_hash_table_lookup (shadow_map, entry->long_name) &&
777 !(entry->flags & G_OPTION_FLAG_NOALIAS))
778 entry->long_name = g_strdup_printf ("%s-%s", g->name, entry->long_name);
780 g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
782 if (seen[(guchar)entry->short_name] &&
783 !(entry->flags & G_OPTION_FLAG_NOALIAS))
784 entry->short_name = 0;
786 seen[(guchar)entry->short_name] = TRUE;
791 g_hash_table_destroy (shadow_map);
793 list = context->groups;
795 max_length = _g_utf8_strwidth ("-?, --help", -1);
799 len = _g_utf8_strwidth ("--help-all", -1);
800 max_length = MAX (max_length, len);
803 if (context->main_group)
805 len = calculate_max_length (context->main_group);
806 max_length = MAX (max_length, len);
811 GOptionGroup *g = list->data;
813 /* First, we check the --help-<groupname> options */
814 len = _g_utf8_strwidth ("--help-", -1) + _g_utf8_strwidth (g->name, -1);
815 max_length = MAX (max_length, len);
817 /* Then we go through the entries */
818 len = calculate_max_length (g);
819 max_length = MAX (max_length, len);
824 /* Add a bit of padding */
829 list = context->groups;
831 g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
832 _("Help Options:"), '?', max_length - 4, "help",
833 _("Show help options"));
835 /* We only want --help-all when there are groups */
837 g_string_append_printf (string, " --%-*s %s\n",
838 max_length, "help-all",
839 _("Show all help options"));
843 GOptionGroup *g = list->data;
845 if (group_has_visible_entries (context, g, FALSE))
846 g_string_append_printf (string, " --help-%-*s %s\n",
847 max_length - 5, g->name,
848 TRANSLATE (g, g->help_description));
853 g_string_append (string, "\n");
858 /* Print a certain group */
860 if (group_has_visible_entries (context, group, FALSE))
862 g_string_append (string, TRANSLATE (group, group->description));
863 g_string_append (string, "\n");
864 for (i = 0; i < group->n_entries; i++)
865 print_entry (group, max_length, &group->entries[i], string);
866 g_string_append (string, "\n");
871 /* Print all groups */
873 list = context->groups;
877 GOptionGroup *g = list->data;
879 if (group_has_visible_entries (context, g, FALSE))
881 g_string_append (string, g->description);
882 g_string_append (string, "\n");
883 for (i = 0; i < g->n_entries; i++)
884 if (!(g->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
885 print_entry (g, max_length, &g->entries[i], string);
887 g_string_append (string, "\n");
894 /* Print application options if --help or --help-all has been specified */
895 if ((main_help || !group) &&
896 (group_has_visible_entries (context, context->main_group, TRUE) ||
897 group_list_has_visible_entires (context, context->groups, TRUE)))
899 list = context->groups;
901 g_string_append (string, _("Application Options:"));
902 g_string_append (string, "\n");
903 if (context->main_group)
904 for (i = 0; i < context->main_group->n_entries; i++)
905 print_entry (context->main_group, max_length,
906 &context->main_group->entries[i], string);
910 GOptionGroup *g = list->data;
912 /* Print main entries from other groups */
913 for (i = 0; i < g->n_entries; i++)
914 if (g->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
915 print_entry (g, max_length, &g->entries[i], string);
920 g_string_append (string, "\n");
923 if (context->description)
925 g_string_append (string, TRANSLATE (context, context->description));
926 g_string_append (string, "\n");
929 return g_string_free (string, FALSE);
934 print_help (GOptionContext *context,
940 help = g_option_context_get_help (context, main_help, group);
941 g_print ("%s", help);
948 parse_int (const gchar *arg_name,
957 tmp = strtol (arg, &end, 0);
959 if (*arg == '\0' || *end != '\0')
962 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
963 _("Cannot parse integer value '%s' for %s"),
969 if (*result != tmp || errno == ERANGE)
972 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
973 _("Integer value '%s' for %s out of range"),
983 parse_double (const gchar *arg_name,
992 tmp = g_strtod (arg, &end);
994 if (*arg == '\0' || *end != '\0')
997 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
998 _("Cannot parse double value '%s' for %s"),
1002 if (errno == ERANGE)
1005 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1006 _("Double value '%s' for %s out of range"),
1018 parse_int64 (const gchar *arg_name,
1027 tmp = g_ascii_strtoll (arg, &end, 0);
1029 if (*arg == '\0' || *end != '\0')
1032 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1033 _("Cannot parse integer value '%s' for %s"),
1037 if (errno == ERANGE)
1040 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1041 _("Integer value '%s' for %s out of range"),
1053 get_change (GOptionContext *context,
1054 GOptionArg arg_type,
1058 Change *change = NULL;
1060 for (list = context->changes; list != NULL; list = list->next)
1062 change = list->data;
1064 if (change->arg_data == arg_data)
1068 change = g_new0 (Change, 1);
1069 change->arg_type = arg_type;
1070 change->arg_data = arg_data;
1072 context->changes = g_list_prepend (context->changes, change);
1080 add_pending_null (GOptionContext *context,
1086 n = g_new0 (PendingNull, 1);
1090 context->pending_nulls = g_list_prepend (context->pending_nulls, n);
1094 parse_arg (GOptionContext *context,
1095 GOptionGroup *group,
1096 GOptionEntry *entry,
1098 const gchar *option_name,
1104 g_assert (value || OPTIONAL_ARG (entry) || NO_ARG (entry));
1108 case G_OPTION_ARG_NONE:
1110 change = get_change (context, G_OPTION_ARG_NONE,
1113 *(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
1116 case G_OPTION_ARG_STRING:
1120 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1125 change = get_change (context, G_OPTION_ARG_STRING,
1127 g_free (change->allocated.str);
1129 change->prev.str = *(gchar **)entry->arg_data;
1130 change->allocated.str = data;
1132 *(gchar **)entry->arg_data = data;
1135 case G_OPTION_ARG_STRING_ARRAY:
1139 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1144 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1147 if (change->allocated.array.len == 0)
1149 change->prev.array = *(gchar ***)entry->arg_data;
1150 change->allocated.array.data = g_new (gchar *, 2);
1153 change->allocated.array.data =
1154 g_renew (gchar *, change->allocated.array.data,
1155 change->allocated.array.len + 2);
1157 change->allocated.array.data[change->allocated.array.len] = data;
1158 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1160 change->allocated.array.len ++;
1162 *(gchar ***)entry->arg_data = change->allocated.array.data;
1167 case G_OPTION_ARG_FILENAME:
1172 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1177 data = g_strdup (value);
1179 change = get_change (context, G_OPTION_ARG_FILENAME,
1181 g_free (change->allocated.str);
1183 change->prev.str = *(gchar **)entry->arg_data;
1184 change->allocated.str = data;
1186 *(gchar **)entry->arg_data = data;
1190 case G_OPTION_ARG_FILENAME_ARRAY:
1195 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1200 data = g_strdup (value);
1202 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1205 if (change->allocated.array.len == 0)
1207 change->prev.array = *(gchar ***)entry->arg_data;
1208 change->allocated.array.data = g_new (gchar *, 2);
1211 change->allocated.array.data =
1212 g_renew (gchar *, change->allocated.array.data,
1213 change->allocated.array.len + 2);
1215 change->allocated.array.data[change->allocated.array.len] = data;
1216 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1218 change->allocated.array.len ++;
1220 *(gchar ***)entry->arg_data = change->allocated.array.data;
1225 case G_OPTION_ARG_INT:
1229 if (!parse_int (option_name, value,
1234 change = get_change (context, G_OPTION_ARG_INT,
1236 change->prev.integer = *(gint *)entry->arg_data;
1237 *(gint *)entry->arg_data = data;
1240 case G_OPTION_ARG_CALLBACK:
1245 if (!value && entry->flags & G_OPTION_FLAG_OPTIONAL_ARG)
1247 else if (entry->flags & G_OPTION_FLAG_NO_ARG)
1249 else if (entry->flags & G_OPTION_FLAG_FILENAME)
1252 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1254 data = g_strdup (value);
1258 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1260 if (!(entry->flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG)) &&
1264 retval = (* (GOptionArgFunc) entry->arg_data) (option_name, data, group->user_data, error);
1266 if (!retval && error != NULL && *error == NULL)
1268 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1269 _("Error parsing option %s"), option_name);
1277 case G_OPTION_ARG_DOUBLE:
1281 if (!parse_double (option_name, value,
1288 change = get_change (context, G_OPTION_ARG_DOUBLE,
1290 change->prev.dbl = *(gdouble *)entry->arg_data;
1291 *(gdouble *)entry->arg_data = data;
1294 case G_OPTION_ARG_INT64:
1298 if (!parse_int64 (option_name, value,
1305 change = get_change (context, G_OPTION_ARG_INT64,
1307 change->prev.int64 = *(gint64 *)entry->arg_data;
1308 *(gint64 *)entry->arg_data = data;
1312 g_assert_not_reached ();
1319 parse_short_option (GOptionContext *context,
1320 GOptionGroup *group,
1331 for (j = 0; j < group->n_entries; j++)
1333 if (arg == group->entries[j].short_name)
1336 gchar *value = NULL;
1338 option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
1340 if (NO_ARG (&group->entries[j]))
1347 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1348 _("Error parsing option %s"), option_name);
1349 g_free (option_name);
1353 if (idx < *argc - 1)
1355 if (!OPTIONAL_ARG (&group->entries[j]))
1357 value = (*argv)[idx + 1];
1358 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1363 if ((*argv)[idx + 1][0] == '-')
1367 value = (*argv)[idx + 1];
1368 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1373 else if (idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
1378 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1379 _("Missing argument for %s"), option_name);
1380 g_free (option_name);
1385 if (!parse_arg (context, group, &group->entries[j],
1386 value, option_name, error))
1388 g_free (option_name);
1392 g_free (option_name);
1401 parse_long_option (GOptionContext *context,
1402 GOptionGroup *group,
1413 for (j = 0; j < group->n_entries; j++)
1418 if (aliased && (group->entries[j].flags & G_OPTION_FLAG_NOALIAS))
1421 if (NO_ARG (&group->entries[j]) &&
1422 strcmp (arg, group->entries[j].long_name) == 0)
1427 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1428 retval = parse_arg (context, group, &group->entries[j],
1429 NULL, option_name, error);
1430 g_free(option_name);
1432 add_pending_null (context, &((*argv)[*idx]), NULL);
1439 gint len = strlen (group->entries[j].long_name);
1441 if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
1442 (arg[len] == '=' || arg[len] == 0))
1444 gchar *value = NULL;
1447 add_pending_null (context, &((*argv)[*idx]), NULL);
1448 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1450 if (arg[len] == '=')
1451 value = arg + len + 1;
1452 else if (*idx < *argc - 1)
1454 if (!(group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG))
1456 value = (*argv)[*idx + 1];
1457 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1462 if ((*argv)[*idx + 1][0] == '-')
1465 retval = parse_arg (context, group, &group->entries[j],
1466 NULL, option_name, error);
1468 g_free (option_name);
1473 value = (*argv)[*idx + 1];
1474 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1479 else if (*idx >= *argc - 1 &&
1480 group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG)
1483 retval = parse_arg (context, group, &group->entries[j],
1484 NULL, option_name, error);
1486 g_free (option_name);
1492 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1493 _("Missing argument for %s"), option_name);
1494 g_free (option_name);
1498 if (!parse_arg (context, group, &group->entries[j],
1499 value, option_name, error))
1501 g_free (option_name);
1505 g_free (option_name);
1515 parse_remaining_arg (GOptionContext *context,
1516 GOptionGroup *group,
1525 for (j = 0; j < group->n_entries; j++)
1530 if (group->entries[j].long_name[0])
1533 g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_CALLBACK ||
1534 group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
1535 group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
1537 add_pending_null (context, &((*argv)[*idx]), NULL);
1539 if (!parse_arg (context, group, &group->entries[j], (*argv)[*idx], "", error))
1550 free_changes_list (GOptionContext *context,
1555 for (list = context->changes; list != NULL; list = list->next)
1557 Change *change = list->data;
1561 switch (change->arg_type)
1563 case G_OPTION_ARG_NONE:
1564 *(gboolean *)change->arg_data = change->prev.bool;
1566 case G_OPTION_ARG_INT:
1567 *(gint *)change->arg_data = change->prev.integer;
1569 case G_OPTION_ARG_STRING:
1570 case G_OPTION_ARG_FILENAME:
1571 g_free (change->allocated.str);
1572 *(gchar **)change->arg_data = change->prev.str;
1574 case G_OPTION_ARG_STRING_ARRAY:
1575 case G_OPTION_ARG_FILENAME_ARRAY:
1576 g_strfreev (change->allocated.array.data);
1577 *(gchar ***)change->arg_data = change->prev.array;
1579 case G_OPTION_ARG_DOUBLE:
1580 *(gdouble *)change->arg_data = change->prev.dbl;
1582 case G_OPTION_ARG_INT64:
1583 *(gint64 *)change->arg_data = change->prev.int64;
1586 g_assert_not_reached ();
1593 g_list_free (context->changes);
1594 context->changes = NULL;
1598 free_pending_nulls (GOptionContext *context,
1599 gboolean perform_nulls)
1603 for (list = context->pending_nulls; list != NULL; list = list->next)
1605 PendingNull *n = list->data;
1611 /* Copy back the short options */
1613 strcpy (*n->ptr + 1, n->value);
1623 g_list_free (context->pending_nulls);
1624 context->pending_nulls = NULL;
1628 * g_option_context_parse:
1629 * @context: a #GOptionContext
1630 * @argc: a pointer to the number of command line arguments
1631 * @argv: a pointer to the array of command line arguments
1632 * @error: a return location for errors
1634 * Parses the command line arguments, recognizing options
1635 * which have been added to @context. A side-effect of
1636 * calling this function is that g_set_prgname() will be
1639 * If the parsing is successful, any parsed arguments are
1640 * removed from the array and @argc and @argv are updated
1641 * accordingly. A '--' option is stripped from @argv
1642 * unless there are unparsed options before and after it,
1643 * or some of the options after it start with '-'. In case
1644 * of an error, @argc and @argv are left unmodified.
1646 * If automatic <option>--help</option> support is enabled
1647 * (see g_option_context_set_help_enabled()), and the
1648 * @argv array contains one of the recognized help options,
1649 * this function will produce help output to stdout and
1650 * call <literal>exit (0)</literal>.
1652 * Note that function depends on the
1653 * <link linkend="setlocale">current locale</link> for
1654 * automatic character set conversion of string and filename
1657 * Return value: %TRUE if the parsing was successful,
1658 * %FALSE if an error occurred
1663 g_option_context_parse (GOptionContext *context,
1671 /* Set program name */
1672 if (!g_get_prgname())
1674 if (argc && argv && *argc)
1678 prgname = g_path_get_basename ((*argv)[0]);
1679 g_set_prgname (prgname);
1683 g_set_prgname ("<unknown>");
1686 /* Call pre-parse hooks */
1687 list = context->groups;
1690 GOptionGroup *group = list->data;
1692 if (group->pre_parse_func)
1694 if (!(* group->pre_parse_func) (context, group,
1695 group->user_data, error))
1702 if (context->main_group && context->main_group->pre_parse_func)
1704 if (!(* context->main_group->pre_parse_func) (context, context->main_group,
1705 context->main_group->user_data, error))
1711 gboolean stop_parsing = FALSE;
1712 gboolean has_unknown = FALSE;
1713 gint separator_pos = 0;
1715 for (i = 1; i < *argc; i++)
1718 gboolean parsed = FALSE;
1720 if ((*argv)[i][0] == '-' && (*argv)[i][1] != '\0' && !stop_parsing)
1722 if ((*argv)[i][1] == '-')
1726 arg = (*argv)[i] + 2;
1728 /* '--' terminates list of arguments */
1732 stop_parsing = TRUE;
1736 /* Handle help options */
1737 if (context->help_enabled)
1739 if (strcmp (arg, "help") == 0)
1740 print_help (context, TRUE, NULL);
1741 else if (strcmp (arg, "help-all") == 0)
1742 print_help (context, FALSE, NULL);
1743 else if (strncmp (arg, "help-", 5) == 0)
1745 list = context->groups;
1749 GOptionGroup *group = list->data;
1751 if (strcmp (arg + 5, group->name) == 0)
1752 print_help (context, FALSE, group);
1759 if (context->main_group &&
1760 !parse_long_option (context, context->main_group, &i, arg,
1761 FALSE, argc, argv, error, &parsed))
1767 /* Try the groups */
1768 list = context->groups;
1771 GOptionGroup *group = list->data;
1773 if (!parse_long_option (context, group, &i, arg,
1774 FALSE, argc, argv, error, &parsed))
1786 /* Now look for --<group>-<option> */
1787 dash = strchr (arg, '-');
1790 /* Try the groups */
1791 list = context->groups;
1794 GOptionGroup *group = list->data;
1796 if (strncmp (group->name, arg, dash - arg) == 0)
1798 if (!parse_long_option (context, group, &i, dash + 1,
1799 TRUE, argc, argv, error, &parsed))
1810 if (context->ignore_unknown)
1814 { /* short option */
1815 gint new_i = i, arg_length;
1816 gboolean *nulled_out = NULL;
1817 arg = (*argv)[i] + 1;
1818 arg_length = strlen (arg);
1819 nulled_out = g_newa (gboolean, arg_length);
1820 memset (nulled_out, 0, arg_length * sizeof (gboolean));
1821 for (j = 0; j < arg_length; j++)
1823 if (context->help_enabled && arg[j] == '?')
1824 print_help (context, TRUE, NULL);
1826 if (context->main_group &&
1827 !parse_short_option (context, context->main_group,
1829 argc, argv, error, &parsed))
1833 /* Try the groups */
1834 list = context->groups;
1837 GOptionGroup *group = list->data;
1838 if (!parse_short_option (context, group, i, &new_i, arg[j],
1839 argc, argv, error, &parsed))
1847 if (context->ignore_unknown && parsed)
1848 nulled_out[j] = TRUE;
1849 else if (context->ignore_unknown)
1853 /* !context->ignore_unknown && parsed */
1855 if (context->ignore_unknown)
1857 gchar *new_arg = NULL;
1859 for (j = 0; j < arg_length; j++)
1864 new_arg = g_malloc (arg_length + 1);
1865 new_arg[arg_index++] = arg[j];
1869 new_arg[arg_index] = '\0';
1870 add_pending_null (context, &((*argv)[i]), new_arg);
1874 add_pending_null (context, &((*argv)[i]), NULL);
1882 if (!parsed && !context->ignore_unknown)
1885 G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1886 _("Unknown option %s"), (*argv)[i]);
1892 /* Collect remaining args */
1893 if (context->main_group &&
1894 !parse_remaining_arg (context, context->main_group, &i,
1895 argc, argv, error, &parsed))
1898 if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
1903 if (separator_pos > 0)
1904 add_pending_null (context, &((*argv)[separator_pos]), NULL);
1908 /* Call post-parse hooks */
1909 list = context->groups;
1912 GOptionGroup *group = list->data;
1914 if (group->post_parse_func)
1916 if (!(* group->post_parse_func) (context, group,
1917 group->user_data, error))
1924 if (context->main_group && context->main_group->post_parse_func)
1926 if (!(* context->main_group->post_parse_func) (context, context->main_group,
1927 context->main_group->user_data, error))
1933 free_pending_nulls (context, TRUE);
1935 for (i = 1; i < *argc; i++)
1937 for (k = i; k < *argc; k++)
1938 if ((*argv)[k] != NULL)
1944 for (j = i + k; j < *argc; j++)
1946 (*argv)[j-k] = (*argv)[j];
1958 /* Call error hooks */
1959 list = context->groups;
1962 GOptionGroup *group = list->data;
1964 if (group->error_func)
1965 (* group->error_func) (context, group,
1966 group->user_data, error);
1971 if (context->main_group && context->main_group->error_func)
1972 (* context->main_group->error_func) (context, context->main_group,
1973 context->main_group->user_data, error);
1975 free_changes_list (context, TRUE);
1976 free_pending_nulls (context, FALSE);
1982 * g_option_group_new:
1983 * @name: the name for the option group, this is used to provide
1984 * help for the options in this group with <option>--help-</option>@name
1985 * @description: a description for this group to be shown in
1986 * <option>--help</option>. This string is translated using the translation
1987 * domain or translation function of the group
1988 * @help_description: a description for the <option>--help-</option>@name option.
1989 * This string is translated using the translation domain or translation function
1991 * @user_data: user data that will be passed to the pre- and post-parse hooks,
1992 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
1993 * @destroy: a function that will be called to free @user_data, or %NULL
1995 * Creates a new #GOptionGroup.
1997 * Return value: a newly created option group. It should be added
1998 * to a #GOptionContext or freed with g_option_group_free().
2003 g_option_group_new (const gchar *name,
2004 const gchar *description,
2005 const gchar *help_description,
2007 GDestroyNotify destroy)
2010 GOptionGroup *group;
2012 group = g_new0 (GOptionGroup, 1);
2013 group->name = g_strdup (name);
2014 group->description = g_strdup (description);
2015 group->help_description = g_strdup (help_description);
2016 group->user_data = user_data;
2017 group->destroy_notify = destroy;
2024 * g_option_group_free:
2025 * @group: a #GOptionGroup
2027 * Frees a #GOptionGroup. Note that you must <emphasis>not</emphasis>
2028 * free groups which have been added to a #GOptionContext.
2033 g_option_group_free (GOptionGroup *group)
2035 g_return_if_fail (group != NULL);
2037 g_free (group->name);
2038 g_free (group->description);
2039 g_free (group->help_description);
2041 g_free (group->entries);
2043 if (group->destroy_notify)
2044 (* group->destroy_notify) (group->user_data);
2046 if (group->translate_notify)
2047 (* group->translate_notify) (group->translate_data);
2054 * g_option_group_add_entries:
2055 * @group: a #GOptionGroup
2056 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
2058 * Adds the options specified in @entries to @group.
2063 g_option_group_add_entries (GOptionGroup *group,
2064 const GOptionEntry *entries)
2068 g_return_if_fail (entries != NULL);
2070 for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++) ;
2072 group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
2074 memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
2076 for (i = group->n_entries; i < group->n_entries + n_entries; i++)
2078 gchar c = group->entries[i].short_name;
2082 if (c == '-' || !g_ascii_isprint (c))
2084 g_warning (G_STRLOC": ignoring invalid short option '%c' (%d)", c, c);
2085 group->entries[i].short_name = 0;
2090 group->n_entries += n_entries;
2094 * g_option_group_set_parse_hooks:
2095 * @group: a #GOptionGroup
2096 * @pre_parse_func: a function to call before parsing, or %NULL
2097 * @post_parse_func: a function to call after parsing, or %NULL
2099 * Associates two functions with @group which will be called
2100 * from g_option_context_parse() before the first option is parsed
2101 * and after the last option has been parsed, respectively.
2103 * Note that the user data to be passed to @pre_parse_func and
2104 * @post_parse_func can be specified when constructing the group
2105 * with g_option_group_new().
2110 g_option_group_set_parse_hooks (GOptionGroup *group,
2111 GOptionParseFunc pre_parse_func,
2112 GOptionParseFunc post_parse_func)
2114 g_return_if_fail (group != NULL);
2116 group->pre_parse_func = pre_parse_func;
2117 group->post_parse_func = post_parse_func;
2121 * g_option_group_set_error_hook:
2122 * @group: a #GOptionGroup
2123 * @error_func: a function to call when an error occurs
2125 * Associates a function with @group which will be called
2126 * from g_option_context_parse() when an error occurs.
2128 * Note that the user data to be passed to @error_func can be
2129 * specified when constructing the group with g_option_group_new().
2134 g_option_group_set_error_hook (GOptionGroup *group,
2135 GOptionErrorFunc error_func)
2137 g_return_if_fail (group != NULL);
2139 group->error_func = error_func;
2144 * g_option_group_set_translate_func:
2145 * @group: a #GOptionGroup
2146 * @func: the #GTranslateFunc, or %NULL
2147 * @data: user data to pass to @func, or %NULL
2148 * @destroy_notify: a function which gets called to free @data, or %NULL
2150 * Sets the function which is used to translate user-visible
2151 * strings, for <option>--help</option> output. Different
2152 * groups can use different #GTranslateFunc<!-- -->s. If @func
2153 * is %NULL, strings are not translated.
2155 * If you are using gettext(), you only need to set the translation
2156 * domain, see g_option_group_set_translation_domain().
2161 g_option_group_set_translate_func (GOptionGroup *group,
2162 GTranslateFunc func,
2164 GDestroyNotify destroy_notify)
2166 g_return_if_fail (group != NULL);
2168 if (group->translate_notify)
2169 group->translate_notify (group->translate_data);
2171 group->translate_func = func;
2172 group->translate_data = data;
2173 group->translate_notify = destroy_notify;
2176 static const gchar *
2177 dgettext_swapped (const gchar *msgid,
2178 const gchar *domainname)
2180 return g_dgettext (domainname, msgid);
2184 * g_option_group_set_translation_domain:
2185 * @group: a #GOptionGroup
2186 * @domain: the domain to use
2188 * A convenience function to use gettext() for translating
2189 * user-visible strings.
2194 g_option_group_set_translation_domain (GOptionGroup *group,
2195 const gchar *domain)
2197 g_return_if_fail (group != NULL);
2199 g_option_group_set_translate_func (group,
2200 (GTranslateFunc)dgettext_swapped,
2206 * g_option_context_set_translate_func:
2207 * @context: a #GOptionContext
2208 * @func: the #GTranslateFunc, or %NULL
2209 * @data: user data to pass to @func, or %NULL
2210 * @destroy_notify: a function which gets called to free @data, or %NULL
2212 * Sets the function which is used to translate the contexts
2213 * user-visible strings, for <option>--help</option> output.
2214 * If @func is %NULL, strings are not translated.
2216 * Note that option groups have their own translation functions,
2217 * this function only affects the @parameter_string (see g_option_context_new()),
2218 * the summary (see g_option_context_set_summary()) and the description
2219 * (see g_option_context_set_description()).
2221 * If you are using gettext(), you only need to set the translation
2222 * domain, see g_option_context_set_translation_domain().
2227 g_option_context_set_translate_func (GOptionContext *context,
2228 GTranslateFunc func,
2230 GDestroyNotify destroy_notify)
2232 g_return_if_fail (context != NULL);
2234 if (context->translate_notify)
2235 context->translate_notify (context->translate_data);
2237 context->translate_func = func;
2238 context->translate_data = data;
2239 context->translate_notify = destroy_notify;
2243 * g_option_context_set_translation_domain:
2244 * @context: a #GOptionContext
2245 * @domain: the domain to use
2247 * A convenience function to use gettext() for translating
2248 * user-visible strings.
2253 g_option_context_set_translation_domain (GOptionContext *context,
2254 const gchar *domain)
2256 g_return_if_fail (context != NULL);
2258 g_option_context_set_translate_func (context,
2259 (GTranslateFunc)dgettext_swapped,
2265 * g_option_context_set_summary:
2266 * @context: a #GOptionContext
2267 * @summary: a string to be shown in <option>--help</option> output
2268 * before the list of options, or %NULL
2270 * Adds a string to be displayed in <option>--help</option> output
2271 * before the list of options. This is typically a summary of the
2272 * program functionality.
2274 * Note that the summary is translated (see
2275 * g_option_context_set_translate_func() and
2276 * g_option_context_set_translation_domain()).
2281 g_option_context_set_summary (GOptionContext *context,
2282 const gchar *summary)
2284 g_return_if_fail (context != NULL);
2286 g_free (context->summary);
2287 context->summary = g_strdup (summary);
2292 * g_option_context_get_summary:
2293 * @context: a #GOptionContext
2295 * Returns the summary. See g_option_context_set_summary().
2297 * Returns: the summary
2301 G_CONST_RETURN gchar *
2302 g_option_context_get_summary (GOptionContext *context)
2304 g_return_val_if_fail (context != NULL, NULL);
2306 return context->summary;
2310 * g_option_context_set_description:
2311 * @context: a #GOptionContext
2312 * @description: a string to be shown in <option>--help</option> output
2313 * after the list of options, or %NULL
2315 * Adds a string to be displayed in <option>--help</option> output
2316 * after the list of options. This text often includes a bug reporting
2319 * Note that the summary is translated (see
2320 * g_option_context_set_translate_func()).
2325 g_option_context_set_description (GOptionContext *context,
2326 const gchar *description)
2328 g_return_if_fail (context != NULL);
2330 g_free (context->description);
2331 context->description = g_strdup (description);
2336 * g_option_context_get_description:
2337 * @context: a #GOptionContext
2339 * Returns the description. See g_option_context_set_description().
2341 * Returns: the description
2345 G_CONST_RETURN gchar *
2346 g_option_context_get_description (GOptionContext *context)
2348 g_return_val_if_fail (context != NULL, NULL);
2350 return context->description;
2354 #define __G_OPTION_C__
2355 #include "galiasdef.c"