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.
36 #define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
38 #define NO_ARG(entry) ((entry)->arg == G_OPTION_ARG_NONE || \
39 ((entry)->arg == G_OPTION_ARG_CALLBACK && \
40 ((entry)->flags & G_OPTION_FLAG_NO_ARG)))
42 #define OPTIONAL_ARG(entry) ((entry)->arg == G_OPTION_ARG_CALLBACK && \
43 (entry)->flags & G_OPTION_FLAG_OPTIONAL_ARG)
75 struct _GOptionContext
79 gchar *parameter_string;
83 GTranslateFunc translate_func;
84 GDestroyNotify translate_notify;
85 gpointer translate_data;
87 guint help_enabled : 1;
88 guint ignore_unknown : 1;
90 GOptionGroup *main_group;
92 /* We keep a list of change so we can revert them */
95 /* We also keep track of all argv elements
96 * that should be NULLed or modified.
105 gchar *help_description;
107 GDestroyNotify destroy_notify;
110 GTranslateFunc translate_func;
111 GDestroyNotify translate_notify;
112 gpointer translate_data;
114 GOptionEntry *entries;
117 GOptionParseFunc pre_parse_func;
118 GOptionParseFunc post_parse_func;
119 GOptionErrorFunc error_func;
122 static void free_changes_list (GOptionContext *context,
124 static void free_pending_nulls (GOptionContext *context,
125 gboolean perform_nulls);
129 _g_unichar_get_width (gunichar c)
131 if (G_UNLIKELY (g_unichar_iszerowidth (c)))
134 /* we ignore the fact that we should call g_unichar_iswide_cjk() under
135 * some locales (legacy East Asian ones) */
136 if (g_unichar_iswide (c))
143 _g_utf8_strwidth (const gchar *p,
147 const gchar *start = p;
148 g_return_val_if_fail (p != NULL || max == 0, 0);
154 len += _g_unichar_get_width (g_utf8_get_char (p));
155 p = g_utf8_next_char (p);
163 /* this case may not be quite correct */
165 len += _g_unichar_get_width (g_utf8_get_char (p));
166 p = g_utf8_next_char (p);
168 while (p - start < max && *p)
170 len += _g_unichar_get_width (g_utf8_get_char (p));
171 p = g_utf8_next_char (p);
180 g_option_error_quark (void)
182 return g_quark_from_static_string ("g-option-context-error-quark");
186 * g_option_context_new:
187 * @parameter_string: a string which is displayed in
188 * the first line of <option>--help</option> output, after the
190 * <literal><replaceable>programname</replaceable> [OPTION...]</literal>
192 * Creates a new option context.
194 * The @parameter_string can serve multiple purposes. It can be used
195 * to add descriptions for "rest" arguments, which are not parsed by
196 * the #GOptionContext, typically something like "FILES" or
197 * "FILE1 FILE2...". If you are using #G_OPTION_REMAINING for
198 * collecting "rest" arguments, GLib handles this automatically by
199 * using the @arg_description of the corresponding #GOptionEntry in
202 * Another usage is to give a short summary of the program
203 * functionality, like " - frob the strings", which will be displayed
204 * in the same line as the usage. For a longer description of the
205 * program functionality that should be displayed as a paragraph
206 * below the usage line, use g_option_context_set_summary().
208 * Note that the @parameter_string is translated using the
209 * function set with g_option_context_set_translate_func(), so
210 * it should normally be passed untranslated.
212 * Returns: a newly created #GOptionContext, which must be
213 * freed with g_option_context_free() after use.
218 g_option_context_new (const gchar *parameter_string)
221 GOptionContext *context;
223 context = g_new0 (GOptionContext, 1);
225 context->parameter_string = g_strdup (parameter_string);
226 context->help_enabled = TRUE;
227 context->ignore_unknown = FALSE;
233 * g_option_context_free:
234 * @context: a #GOptionContext
236 * Frees context and all the groups which have been
241 void g_option_context_free (GOptionContext *context)
243 g_return_if_fail (context != NULL);
245 g_list_foreach (context->groups, (GFunc)g_option_group_free, NULL);
246 g_list_free (context->groups);
248 if (context->main_group)
249 g_option_group_free (context->main_group);
251 free_changes_list (context, FALSE);
252 free_pending_nulls (context, FALSE);
254 g_free (context->parameter_string);
255 g_free (context->summary);
256 g_free (context->description);
258 if (context->translate_notify)
259 (* context->translate_notify) (context->translate_data);
266 * g_option_context_set_help_enabled:
267 * @context: a #GOptionContext
268 * @help_enabled: %TRUE to enable <option>--help</option>, %FALSE to disable it
270 * Enables or disables automatic generation of <option>--help</option>
271 * output. By default, g_option_context_parse() recognizes
272 * <option>--help</option>, <option>-?</option>, <option>--help-all</option>
273 * and <option>--help-</option><replaceable>groupname</replaceable> and creates
274 * suitable output to stdout.
278 void g_option_context_set_help_enabled (GOptionContext *context,
279 gboolean help_enabled)
282 g_return_if_fail (context != NULL);
284 context->help_enabled = help_enabled;
288 * g_option_context_get_help_enabled:
289 * @context: a #GOptionContext
291 * Returns whether automatic <option>--help</option> generation
292 * is turned on for @context. See g_option_context_set_help_enabled().
294 * Returns: %TRUE if automatic help generation is turned on.
299 g_option_context_get_help_enabled (GOptionContext *context)
301 g_return_val_if_fail (context != NULL, FALSE);
303 return context->help_enabled;
307 * g_option_context_set_ignore_unknown_options:
308 * @context: a #GOptionContext
309 * @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
310 * an error when unknown options are met
312 * Sets whether to ignore unknown options or not. If an argument is
313 * ignored, it is left in the @argv array after parsing. By default,
314 * g_option_context_parse() treats unknown options as error.
316 * This setting does not affect non-option arguments (i.e. arguments
317 * which don't start with a dash). But note that GOption cannot reliably
318 * determine whether a non-option belongs to a preceding unknown option.
323 g_option_context_set_ignore_unknown_options (GOptionContext *context,
324 gboolean ignore_unknown)
326 g_return_if_fail (context != NULL);
328 context->ignore_unknown = ignore_unknown;
332 * g_option_context_get_ignore_unknown_options:
333 * @context: a #GOptionContext
335 * Returns whether unknown options are ignored or not. See
336 * g_option_context_set_ignore_unknown_options().
338 * Returns: %TRUE if unknown options are ignored.
343 g_option_context_get_ignore_unknown_options (GOptionContext *context)
345 g_return_val_if_fail (context != NULL, FALSE);
347 return context->ignore_unknown;
351 * g_option_context_add_group:
352 * @context: a #GOptionContext
353 * @group: the group to add
355 * Adds a #GOptionGroup to the @context, so that parsing with @context
356 * will recognize the options in the group. Note that the group will
357 * be freed together with the context when g_option_context_free() is
358 * called, so you must not free the group yourself after adding it
364 g_option_context_add_group (GOptionContext *context,
369 g_return_if_fail (context != NULL);
370 g_return_if_fail (group != NULL);
371 g_return_if_fail (group->name != NULL);
372 g_return_if_fail (group->description != NULL);
373 g_return_if_fail (group->help_description != NULL);
375 for (list = context->groups; list; list = list->next)
377 GOptionGroup *g = (GOptionGroup *)list->data;
379 if ((group->name == NULL && g->name == NULL) ||
380 (group->name && g->name && strcmp (group->name, g->name) == 0))
381 g_warning ("A group named \"%s\" is already part of this GOptionContext",
385 context->groups = g_list_append (context->groups, group);
389 * g_option_context_set_main_group:
390 * @context: a #GOptionContext
391 * @group: the group to set as main group
393 * Sets a #GOptionGroup as main group of the @context.
394 * This has the same effect as calling g_option_context_add_group(),
395 * the only difference is that the options in the main group are
396 * treated differently when generating <option>--help</option> output.
401 g_option_context_set_main_group (GOptionContext *context,
404 g_return_if_fail (context != NULL);
405 g_return_if_fail (group != NULL);
407 if (context->main_group)
409 g_warning ("This GOptionContext already has a main group");
414 context->main_group = group;
418 * g_option_context_get_main_group:
419 * @context: a #GOptionContext
421 * Returns a pointer to the main group of @context.
423 * Return value: the main group of @context, or %NULL if @context doesn't
424 * have a main group. Note that group belongs to @context and should
425 * not be modified or freed.
430 g_option_context_get_main_group (GOptionContext *context)
432 g_return_val_if_fail (context != NULL, NULL);
434 return context->main_group;
438 * g_option_context_add_main_entries:
439 * @context: a #GOptionContext
440 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
441 * @translation_domain: a translation domain to use for translating
442 * the <option>--help</option> output for the options in @entries
443 * with gettext(), or %NULL
445 * A convenience function which creates a main group if it doesn't
446 * exist, adds the @entries to it and sets the translation domain.
451 g_option_context_add_main_entries (GOptionContext *context,
452 const GOptionEntry *entries,
453 const gchar *translation_domain)
455 g_return_if_fail (entries != NULL);
457 if (!context->main_group)
458 context->main_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
460 g_option_group_add_entries (context->main_group, entries);
461 g_option_group_set_translation_domain (context->main_group, translation_domain);
465 calculate_max_length (GOptionGroup *group)
468 gint i, len, max_length;
472 for (i = 0; i < group->n_entries; i++)
474 entry = &group->entries[i];
476 if (entry->flags & G_OPTION_FLAG_HIDDEN)
479 len = _g_utf8_strwidth (entry->long_name, -1);
481 if (entry->short_name)
484 if (!NO_ARG (entry) && entry->arg_description)
485 len += 1 + _g_utf8_strwidth (TRANSLATE (group, entry->arg_description), -1);
487 max_length = MAX (max_length, len);
494 print_entry (GOptionGroup *group,
496 const GOptionEntry *entry,
501 if (entry->flags & G_OPTION_FLAG_HIDDEN)
504 if (entry->long_name[0] == 0)
507 str = g_string_new (NULL);
509 if (entry->short_name)
510 g_string_append_printf (str, " -%c, --%s", entry->short_name, entry->long_name);
512 g_string_append_printf (str, " --%s", entry->long_name);
514 if (entry->arg_description)
515 g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
517 g_string_append_printf (string, "%s%*s %s\n", str->str,
518 (int) (max_length + 4 - _g_utf8_strwidth (str->str, -1)), "",
519 entry->description ? TRANSLATE (group, entry->description) : "");
520 g_string_free (str, TRUE);
524 group_has_visible_entries (GOptionGroup *group,
525 gboolean main_entries)
527 GOptionFlags reject_filter = G_OPTION_FLAG_HIDDEN;
532 reject_filter |= G_OPTION_FLAG_IN_MAIN;
534 for (i = 0, l = (group ? group->n_entries : 0); i < l; i++)
536 entry = &group->entries[i];
538 if (main_entries && !(entry->flags & G_OPTION_FLAG_IN_MAIN))
540 if (!(entry->flags & reject_filter))
548 group_list_has_visible_entires (GList *group_list,
549 gboolean main_entries)
553 if (group_has_visible_entries (group_list->data, main_entries))
556 group_list = group_list->next;
563 * g_option_context_get_help:
564 * @context: a #GOptionContext
565 * @main_help: if %TRUE, only include the main group
566 * @group: the #GOptionGroup to create help for, or %NULL
568 * Returns a formatted, translated help text for the given context.
569 * To obtain the text produced by <option>--help</option>, call
570 * <literal>g_option_context_get_help (context, TRUE, NULL)</literal>.
571 * To obtain the text produced by <option>--help-all</option>, call
572 * <literal>g_option_context_get_help (context, FALSE, NULL)</literal>.
573 * To obtain the help text for an option group, call
574 * <literal>g_option_context_get_help (context, FALSE, group)</literal>.
576 * Returns: A newly allocated string containing the help text
581 g_option_context_get_help (GOptionContext *context,
586 gint max_length, len;
589 GHashTable *shadow_map;
591 const gchar *rest_description;
594 string = g_string_sized_new (1024);
596 rest_description = NULL;
597 if (context->main_group)
600 for (i = 0; i < context->main_group->n_entries; i++)
602 entry = &context->main_group->entries[i];
603 if (entry->long_name[0] == 0)
605 rest_description = TRANSLATE (context->main_group, entry->arg_description);
611 g_string_append_printf (string, "%s\n %s %s",
612 _("Usage:"), g_get_prgname(), _("[OPTION...]"));
614 if (rest_description)
616 g_string_append (string, " ");
617 g_string_append (string, rest_description);
620 if (context->parameter_string)
622 g_string_append (string, " ");
623 g_string_append (string, TRANSLATE (context, context->parameter_string));
626 g_string_append (string, "\n\n");
628 if (context->summary)
630 g_string_append (string, TRANSLATE (context, context->summary));
631 g_string_append (string, "\n\n");
634 memset (seen, 0, sizeof (gboolean) * 256);
635 shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
637 if (context->main_group)
639 for (i = 0; i < context->main_group->n_entries; i++)
641 entry = &context->main_group->entries[i];
642 g_hash_table_insert (shadow_map,
643 (gpointer)entry->long_name,
646 if (seen[(guchar)entry->short_name])
647 entry->short_name = 0;
649 seen[(guchar)entry->short_name] = TRUE;
653 list = context->groups;
656 GOptionGroup *group = list->data;
657 for (i = 0; i < group->n_entries; i++)
659 entry = &group->entries[i];
660 if (g_hash_table_lookup (shadow_map, entry->long_name) &&
661 !(entry->flags & G_OPTION_FLAG_NOALIAS))
662 entry->long_name = g_strdup_printf ("%s-%s", group->name, entry->long_name);
664 g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
666 if (seen[(guchar)entry->short_name] &&
667 !(entry->flags & G_OPTION_FLAG_NOALIAS))
668 entry->short_name = 0;
670 seen[(guchar)entry->short_name] = TRUE;
675 g_hash_table_destroy (shadow_map);
677 list = context->groups;
679 max_length = _g_utf8_strwidth ("-?, --help", -1);
683 len = _g_utf8_strwidth ("--help-all", -1);
684 max_length = MAX (max_length, len);
687 if (context->main_group)
689 len = calculate_max_length (context->main_group);
690 max_length = MAX (max_length, len);
695 GOptionGroup *group = list->data;
697 /* First, we check the --help-<groupname> options */
698 len = _g_utf8_strwidth ("--help-", -1) + _g_utf8_strwidth (group->name, -1);
699 max_length = MAX (max_length, len);
701 /* Then we go through the entries */
702 len = calculate_max_length (group);
703 max_length = MAX (max_length, len);
708 /* Add a bit of padding */
713 list = context->groups;
715 g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
716 _("Help Options:"), '?', max_length - 4, "help",
717 _("Show help options"));
719 /* We only want --help-all when there are groups */
721 g_string_append_printf (string, " --%-*s %s\n",
722 max_length, "help-all",
723 _("Show all help options"));
727 GOptionGroup *group = list->data;
729 if (group_has_visible_entries (group, FALSE))
730 g_string_append_printf (string, " --help-%-*s %s\n",
731 max_length - 5, group->name,
732 TRANSLATE (group, group->help_description));
737 g_string_append (string, "\n");
742 /* Print a certain group */
744 if (group_has_visible_entries (group, FALSE))
746 g_string_append (string, TRANSLATE (group, group->description));
747 g_string_append (string, "\n");
748 for (i = 0; i < group->n_entries; i++)
749 print_entry (group, max_length, &group->entries[i], string);
750 g_string_append (string, "\n");
755 /* Print all groups */
757 list = context->groups;
761 GOptionGroup *group = list->data;
763 if (group_has_visible_entries (group, FALSE))
765 g_string_append (string, group->description);
766 g_string_append (string, "\n");
767 for (i = 0; i < group->n_entries; i++)
768 if (!(group->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
769 print_entry (group, max_length, &group->entries[i], string);
771 g_string_append (string, "\n");
778 /* Print application options if --help or --help-all has been specified */
779 if ((main_help || !group) &&
780 (group_has_visible_entries (context->main_group, TRUE) ||
781 group_list_has_visible_entires (context->groups, TRUE)))
783 list = context->groups;
785 g_string_append (string, _("Application Options:"));
786 g_string_append (string, "\n");
787 if (context->main_group)
788 for (i = 0; i < context->main_group->n_entries; i++)
789 print_entry (context->main_group, max_length,
790 &context->main_group->entries[i], string);
794 GOptionGroup *group = list->data;
796 /* Print main entries from other groups */
797 for (i = 0; i < group->n_entries; i++)
798 if (group->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
799 print_entry (group, max_length, &group->entries[i], string);
804 g_string_append (string, "\n");
807 if (context->description)
809 g_string_append (string, TRANSLATE (context, context->description));
810 g_string_append (string, "\n");
813 return g_string_free (string, FALSE);
817 print_help (GOptionContext *context,
823 help = g_option_context_get_help (context, main_help, group);
824 g_print ("%s", help);
831 parse_int (const gchar *arg_name,
840 tmp = strtol (arg, &end, 0);
842 if (*arg == '\0' || *end != '\0')
845 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
846 _("Cannot parse integer value '%s' for %s"),
852 if (*result != tmp || errno == ERANGE)
855 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
856 _("Integer value '%s' for %s out of range"),
866 parse_double (const gchar *arg_name,
875 tmp = g_strtod (arg, &end);
877 if (*arg == '\0' || *end != '\0')
880 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
881 _("Cannot parse double value '%s' for %s"),
888 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
889 _("Double value '%s' for %s out of range"),
901 parse_int64 (const gchar *arg_name,
910 tmp = g_ascii_strtoll (arg, &end, 0);
912 if (*arg == '\0' || *end != '\0')
915 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
916 _("Cannot parse integer value '%s' for %s"),
923 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
924 _("Integer value '%s' for %s out of range"),
936 get_change (GOptionContext *context,
941 Change *change = NULL;
943 for (list = context->changes; list != NULL; list = list->next)
947 if (change->arg_data == arg_data)
951 change = g_new0 (Change, 1);
952 change->arg_type = arg_type;
953 change->arg_data = arg_data;
955 context->changes = g_list_prepend (context->changes, change);
963 add_pending_null (GOptionContext *context,
969 n = g_new0 (PendingNull, 1);
973 context->pending_nulls = g_list_prepend (context->pending_nulls, n);
977 parse_arg (GOptionContext *context,
981 const gchar *option_name,
987 g_assert (value || OPTIONAL_ARG (entry) || NO_ARG (entry));
991 case G_OPTION_ARG_NONE:
993 change = get_change (context, G_OPTION_ARG_NONE,
996 *(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
999 case G_OPTION_ARG_STRING:
1003 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1008 change = get_change (context, G_OPTION_ARG_STRING,
1010 g_free (change->allocated.str);
1012 change->prev.str = *(gchar **)entry->arg_data;
1013 change->allocated.str = data;
1015 *(gchar **)entry->arg_data = data;
1018 case G_OPTION_ARG_STRING_ARRAY:
1022 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1027 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1030 if (change->allocated.array.len == 0)
1032 change->prev.array = *(gchar ***)entry->arg_data;
1033 change->allocated.array.data = g_new (gchar *, 2);
1036 change->allocated.array.data =
1037 g_renew (gchar *, change->allocated.array.data,
1038 change->allocated.array.len + 2);
1040 change->allocated.array.data[change->allocated.array.len] = data;
1041 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1043 change->allocated.array.len ++;
1045 *(gchar ***)entry->arg_data = change->allocated.array.data;
1050 case G_OPTION_ARG_FILENAME:
1055 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1060 data = g_strdup (value);
1062 change = get_change (context, G_OPTION_ARG_FILENAME,
1064 g_free (change->allocated.str);
1066 change->prev.str = *(gchar **)entry->arg_data;
1067 change->allocated.str = data;
1069 *(gchar **)entry->arg_data = data;
1073 case G_OPTION_ARG_FILENAME_ARRAY:
1078 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1083 data = g_strdup (value);
1085 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1088 if (change->allocated.array.len == 0)
1090 change->prev.array = *(gchar ***)entry->arg_data;
1091 change->allocated.array.data = g_new (gchar *, 2);
1094 change->allocated.array.data =
1095 g_renew (gchar *, change->allocated.array.data,
1096 change->allocated.array.len + 2);
1098 change->allocated.array.data[change->allocated.array.len] = data;
1099 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1101 change->allocated.array.len ++;
1103 *(gchar ***)entry->arg_data = change->allocated.array.data;
1108 case G_OPTION_ARG_INT:
1112 if (!parse_int (option_name, value,
1117 change = get_change (context, G_OPTION_ARG_INT,
1119 change->prev.integer = *(gint *)entry->arg_data;
1120 *(gint *)entry->arg_data = data;
1123 case G_OPTION_ARG_CALLBACK:
1128 if (!value && entry->flags & G_OPTION_FLAG_OPTIONAL_ARG)
1130 else if (entry->flags & G_OPTION_FLAG_NO_ARG)
1132 else if (entry->flags & G_OPTION_FLAG_FILENAME)
1135 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1137 data = g_strdup (value);
1141 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1143 if (!(entry->flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG)) &&
1147 retval = (* (GOptionArgFunc) entry->arg_data) (option_name, data, group->user_data, error);
1155 case G_OPTION_ARG_DOUBLE:
1159 if (!parse_double (option_name, value,
1166 change = get_change (context, G_OPTION_ARG_DOUBLE,
1168 change->prev.dbl = *(gdouble *)entry->arg_data;
1169 *(gdouble *)entry->arg_data = data;
1172 case G_OPTION_ARG_INT64:
1176 if (!parse_int64 (option_name, value,
1183 change = get_change (context, G_OPTION_ARG_INT64,
1185 change->prev.int64 = *(gint64 *)entry->arg_data;
1186 *(gint64 *)entry->arg_data = data;
1190 g_assert_not_reached ();
1197 parse_short_option (GOptionContext *context,
1198 GOptionGroup *group,
1209 for (j = 0; j < group->n_entries; j++)
1211 if (arg == group->entries[j].short_name)
1214 gchar *value = NULL;
1216 option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
1218 if (NO_ARG (&group->entries[j]))
1222 if (*new_index > index)
1225 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1226 _("Error parsing option %s"), option_name);
1227 g_free (option_name);
1231 if (index < *argc - 1)
1233 if (!OPTIONAL_ARG (&group->entries[j]))
1235 value = (*argv)[index + 1];
1236 add_pending_null (context, &((*argv)[index + 1]), NULL);
1237 *new_index = index+1;
1241 if ((*argv)[index + 1][0] == '-')
1245 value = (*argv)[index + 1];
1246 add_pending_null (context, &((*argv)[index + 1]), NULL);
1247 *new_index = index + 1;
1251 else if (index >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
1256 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1257 _("Missing argument for %s"), option_name);
1258 g_free (option_name);
1263 if (!parse_arg (context, group, &group->entries[j],
1264 value, option_name, error))
1266 g_free (option_name);
1270 g_free (option_name);
1279 parse_long_option (GOptionContext *context,
1280 GOptionGroup *group,
1291 for (j = 0; j < group->n_entries; j++)
1293 if (*index >= *argc)
1296 if (aliased && (group->entries[j].flags & G_OPTION_FLAG_NOALIAS))
1299 if (NO_ARG (&group->entries[j]) &&
1300 strcmp (arg, group->entries[j].long_name) == 0)
1304 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1305 parse_arg (context, group, &group->entries[j],
1306 NULL, option_name, error);
1307 g_free(option_name);
1309 add_pending_null (context, &((*argv)[*index]), NULL);
1314 gint len = strlen (group->entries[j].long_name);
1316 if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
1317 (arg[len] == '=' || arg[len] == 0))
1319 gchar *value = NULL;
1322 add_pending_null (context, &((*argv)[*index]), NULL);
1323 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1325 if (arg[len] == '=')
1326 value = arg + len + 1;
1327 else if (*index < *argc - 1)
1329 if (!(group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG))
1331 value = (*argv)[*index + 1];
1332 add_pending_null (context, &((*argv)[*index + 1]), NULL);
1337 if ((*argv)[*index + 1][0] == '-')
1340 retval = parse_arg (context, group, &group->entries[j],
1341 NULL, option_name, error);
1343 g_free (option_name);
1348 value = (*argv)[*index + 1];
1349 add_pending_null (context, &((*argv)[*index + 1]), NULL);
1354 else if (*index >= *argc - 1 &&
1355 group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG)
1358 retval = parse_arg (context, group, &group->entries[j],
1359 NULL, option_name, error);
1361 g_free (option_name);
1367 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1368 _("Missing argument for %s"), option_name);
1369 g_free (option_name);
1373 if (!parse_arg (context, group, &group->entries[j],
1374 value, option_name, error))
1376 g_free (option_name);
1380 g_free (option_name);
1390 parse_remaining_arg (GOptionContext *context,
1391 GOptionGroup *group,
1400 for (j = 0; j < group->n_entries; j++)
1402 if (*index >= *argc)
1405 if (group->entries[j].long_name[0])
1408 g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_CALLBACK ||
1409 group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
1410 group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
1412 add_pending_null (context, &((*argv)[*index]), NULL);
1414 if (!parse_arg (context, group, &group->entries[j], (*argv)[*index], "", error))
1425 free_changes_list (GOptionContext *context,
1430 for (list = context->changes; list != NULL; list = list->next)
1432 Change *change = list->data;
1436 switch (change->arg_type)
1438 case G_OPTION_ARG_NONE:
1439 *(gboolean *)change->arg_data = change->prev.bool;
1441 case G_OPTION_ARG_INT:
1442 *(gint *)change->arg_data = change->prev.integer;
1444 case G_OPTION_ARG_STRING:
1445 case G_OPTION_ARG_FILENAME:
1446 g_free (change->allocated.str);
1447 *(gchar **)change->arg_data = change->prev.str;
1449 case G_OPTION_ARG_STRING_ARRAY:
1450 case G_OPTION_ARG_FILENAME_ARRAY:
1451 g_strfreev (change->allocated.array.data);
1452 *(gchar ***)change->arg_data = change->prev.array;
1454 case G_OPTION_ARG_DOUBLE:
1455 *(gdouble *)change->arg_data = change->prev.dbl;
1457 case G_OPTION_ARG_INT64:
1458 *(gint64 *)change->arg_data = change->prev.int64;
1461 g_assert_not_reached ();
1468 g_list_free (context->changes);
1469 context->changes = NULL;
1473 free_pending_nulls (GOptionContext *context,
1474 gboolean perform_nulls)
1478 for (list = context->pending_nulls; list != NULL; list = list->next)
1480 PendingNull *n = list->data;
1486 /* Copy back the short options */
1488 strcpy (*n->ptr + 1, n->value);
1498 g_list_free (context->pending_nulls);
1499 context->pending_nulls = NULL;
1503 * g_option_context_parse:
1504 * @context: a #GOptionContext
1505 * @argc: a pointer to the number of command line arguments
1506 * @argv: a pointer to the array of command line arguments
1507 * @error: a return location for errors
1509 * Parses the command line arguments, recognizing options
1510 * which have been added to @context. A side-effect of
1511 * calling this function is that g_set_prgname() will be
1514 * If the parsing is successful, any parsed arguments are
1515 * removed from the array and @argc and @argv are updated
1516 * accordingly. A '--' option is stripped from @argv
1517 * unless there are unparsed options before and after it,
1518 * or some of the options after it start with '-'. In case
1519 * of an error, @argc and @argv are left unmodified.
1521 * If automatic <option>--help</option> support is enabled
1522 * (see g_option_context_set_help_enabled()), and the
1523 * @argv array contains one of the recognized help options,
1524 * this function will produce help output to stdout and
1525 * call <literal>exit (0)</literal>.
1527 * Note that function depends on the
1528 * <link linkend="setlocale">current locale</link> for
1529 * automatic character set conversion of string and filename
1532 * Return value: %TRUE if the parsing was successful,
1533 * %FALSE if an error occurred
1538 g_option_context_parse (GOptionContext *context,
1546 /* Set program name */
1547 if (!g_get_prgname())
1549 if (argc && argv && *argc)
1553 prgname = g_path_get_basename ((*argv)[0]);
1554 g_set_prgname (prgname);
1558 g_set_prgname ("<unknown>");
1561 /* Call pre-parse hooks */
1562 list = context->groups;
1565 GOptionGroup *group = list->data;
1567 if (group->pre_parse_func)
1569 if (!(* group->pre_parse_func) (context, group,
1570 group->user_data, error))
1577 if (context->main_group && context->main_group->pre_parse_func)
1579 if (!(* context->main_group->pre_parse_func) (context, context->main_group,
1580 context->main_group->user_data, error))
1586 gboolean stop_parsing = FALSE;
1587 gboolean has_unknown = FALSE;
1588 gint separator_pos = 0;
1590 for (i = 1; i < *argc; i++)
1593 gboolean parsed = FALSE;
1595 if ((*argv)[i][0] == '-' && (*argv)[i][1] != '\0' && !stop_parsing)
1597 if ((*argv)[i][1] == '-')
1601 arg = (*argv)[i] + 2;
1603 /* '--' terminates list of arguments */
1607 stop_parsing = TRUE;
1611 /* Handle help options */
1612 if (context->help_enabled)
1614 if (strcmp (arg, "help") == 0)
1615 print_help (context, TRUE, NULL);
1616 else if (strcmp (arg, "help-all") == 0)
1617 print_help (context, FALSE, NULL);
1618 else if (strncmp (arg, "help-", 5) == 0)
1622 list = context->groups;
1626 GOptionGroup *group = list->data;
1628 if (strcmp (arg + 5, group->name) == 0)
1629 print_help (context, FALSE, group);
1636 if (context->main_group &&
1637 !parse_long_option (context, context->main_group, &i, arg,
1638 FALSE, argc, argv, error, &parsed))
1644 /* Try the groups */
1645 list = context->groups;
1648 GOptionGroup *group = list->data;
1650 if (!parse_long_option (context, group, &i, arg,
1651 FALSE, argc, argv, error, &parsed))
1663 /* Now look for --<group>-<option> */
1664 dash = strchr (arg, '-');
1667 /* Try the groups */
1668 list = context->groups;
1671 GOptionGroup *group = list->data;
1673 if (strncmp (group->name, arg, dash - arg) == 0)
1675 if (!parse_long_option (context, group, &i, dash + 1,
1676 TRUE, argc, argv, error, &parsed))
1687 if (context->ignore_unknown)
1691 { /* short option */
1692 gint j, new_i = i, arg_length;
1693 gboolean *nulled_out = NULL;
1694 arg = (*argv)[i] + 1;
1695 arg_length = strlen (arg);
1696 nulled_out = g_newa (gboolean, arg_length);
1697 memset (nulled_out, 0, arg_length * sizeof (gboolean));
1698 for (j = 0; j < arg_length; j++)
1700 if (context->help_enabled && arg[j] == '?')
1701 print_help (context, TRUE, NULL);
1703 if (context->main_group &&
1704 !parse_short_option (context, context->main_group,
1706 argc, argv, error, &parsed))
1710 /* Try the groups */
1711 list = context->groups;
1714 GOptionGroup *group = list->data;
1715 if (!parse_short_option (context, group, i, &new_i, arg[j],
1716 argc, argv, error, &parsed))
1724 if (context->ignore_unknown && parsed)
1725 nulled_out[j] = TRUE;
1726 else if (context->ignore_unknown)
1730 /* !context->ignore_unknown && parsed */
1732 if (context->ignore_unknown)
1734 gchar *new_arg = NULL;
1736 for (j = 0; j < arg_length; j++)
1741 new_arg = g_malloc (arg_length + 1);
1742 new_arg[arg_index++] = arg[j];
1746 new_arg[arg_index] = '\0';
1747 add_pending_null (context, &((*argv)[i]), new_arg);
1751 add_pending_null (context, &((*argv)[i]), NULL);
1759 if (!parsed && !context->ignore_unknown)
1762 G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1763 _("Unknown option %s"), (*argv)[i]);
1769 /* Collect remaining args */
1770 if (context->main_group &&
1771 !parse_remaining_arg (context, context->main_group, &i,
1772 argc, argv, error, &parsed))
1775 if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
1780 if (separator_pos > 0)
1781 add_pending_null (context, &((*argv)[separator_pos]), NULL);
1785 /* Call post-parse hooks */
1786 list = context->groups;
1789 GOptionGroup *group = list->data;
1791 if (group->post_parse_func)
1793 if (!(* group->post_parse_func) (context, group,
1794 group->user_data, error))
1801 if (context->main_group && context->main_group->post_parse_func)
1803 if (!(* context->main_group->post_parse_func) (context, context->main_group,
1804 context->main_group->user_data, error))
1810 free_pending_nulls (context, TRUE);
1812 for (i = 1; i < *argc; i++)
1814 for (k = i; k < *argc; k++)
1815 if ((*argv)[k] != NULL)
1821 for (j = i + k; j < *argc; j++)
1823 (*argv)[j-k] = (*argv)[j];
1835 /* Call error hooks */
1836 list = context->groups;
1839 GOptionGroup *group = list->data;
1841 if (group->error_func)
1842 (* group->error_func) (context, group,
1843 group->user_data, error);
1848 if (context->main_group && context->main_group->error_func)
1849 (* context->main_group->error_func) (context, context->main_group,
1850 context->main_group->user_data, error);
1852 free_changes_list (context, TRUE);
1853 free_pending_nulls (context, FALSE);
1859 * g_option_group_new:
1860 * @name: the name for the option group, this is used to provide
1861 * help for the options in this group with <option>--help-</option>@name
1862 * @description: a description for this group to be shown in
1863 * <option>--help</option>. This string is translated using the translation
1864 * domain or translation function of the group
1865 * @help_description: a description for the <option>--help-</option>@name option.
1866 * This string is translated using the translation domain or translation function
1868 * @user_data: user data that will be passed to the pre- and post-parse hooks,
1869 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
1870 * @destroy: a function that will be called to free @user_data, or %NULL
1872 * Creates a new #GOptionGroup.
1874 * Return value: a newly created option group. It should be added
1875 * to a #GOptionContext or freed with g_option_group_free().
1880 g_option_group_new (const gchar *name,
1881 const gchar *description,
1882 const gchar *help_description,
1884 GDestroyNotify destroy)
1887 GOptionGroup *group;
1889 group = g_new0 (GOptionGroup, 1);
1890 group->name = g_strdup (name);
1891 group->description = g_strdup (description);
1892 group->help_description = g_strdup (help_description);
1893 group->user_data = user_data;
1894 group->destroy_notify = destroy;
1901 * g_option_group_free:
1902 * @group: a #GOptionGroup
1904 * Frees a #GOptionGroup. Note that you must <emphasis>not</emphasis>
1905 * free groups which have been added to a #GOptionContext.
1910 g_option_group_free (GOptionGroup *group)
1912 g_return_if_fail (group != NULL);
1914 g_free (group->name);
1915 g_free (group->description);
1916 g_free (group->help_description);
1918 g_free (group->entries);
1920 if (group->destroy_notify)
1921 (* group->destroy_notify) (group->user_data);
1923 if (group->translate_notify)
1924 (* group->translate_notify) (group->translate_data);
1931 * g_option_group_add_entries:
1932 * @group: a #GOptionGroup
1933 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
1935 * Adds the options specified in @entries to @group.
1940 g_option_group_add_entries (GOptionGroup *group,
1941 const GOptionEntry *entries)
1945 g_return_if_fail (entries != NULL);
1947 for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++) ;
1949 group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
1951 memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
1953 for (i = group->n_entries; i < group->n_entries + n_entries; i++)
1955 gchar c = group->entries[i].short_name;
1959 if (c == '-' || !g_ascii_isprint (c))
1961 g_warning (G_STRLOC": ignoring invalid short option '%c' (%d)", c, c);
1962 group->entries[i].short_name = 0;
1967 group->n_entries += n_entries;
1971 * g_option_group_set_parse_hooks:
1972 * @group: a #GOptionGroup
1973 * @pre_parse_func: a function to call before parsing, or %NULL
1974 * @post_parse_func: a function to call after parsing, or %NULL
1976 * Associates two functions with @group which will be called
1977 * from g_option_context_parse() before the first option is parsed
1978 * and after the last option has been parsed, respectively.
1980 * Note that the user data to be passed to @pre_parse_func and
1981 * @post_parse_func can be specified when constructing the group
1982 * with g_option_group_new().
1987 g_option_group_set_parse_hooks (GOptionGroup *group,
1988 GOptionParseFunc pre_parse_func,
1989 GOptionParseFunc post_parse_func)
1991 g_return_if_fail (group != NULL);
1993 group->pre_parse_func = pre_parse_func;
1994 group->post_parse_func = post_parse_func;
1998 * g_option_group_set_error_hook:
1999 * @group: a #GOptionGroup
2000 * @error_func: a function to call when an error occurs
2002 * Associates a function with @group which will be called
2003 * from g_option_context_parse() when an error occurs.
2005 * Note that the user data to be passed to @pre_parse_func and
2006 * @post_parse_func can be specified when constructing the group
2007 * with g_option_group_new().
2012 g_option_group_set_error_hook (GOptionGroup *group,
2013 GOptionErrorFunc error_func)
2015 g_return_if_fail (group != NULL);
2017 group->error_func = error_func;
2022 * g_option_group_set_translate_func:
2023 * @group: a #GOptionGroup
2024 * @func: the #GTranslateFunc, or %NULL
2025 * @data: user data to pass to @func, or %NULL
2026 * @destroy_notify: a function which gets called to free @data, or %NULL
2028 * Sets the function which is used to translate user-visible
2029 * strings, for <option>--help</option> output. Different
2030 * groups can use different #GTranslateFunc<!-- -->s. If @func
2031 * is %NULL, strings are not translated.
2033 * If you are using gettext(), you only need to set the translation
2034 * domain, see g_option_group_set_translation_domain().
2039 g_option_group_set_translate_func (GOptionGroup *group,
2040 GTranslateFunc func,
2042 GDestroyNotify destroy_notify)
2044 g_return_if_fail (group != NULL);
2046 if (group->translate_notify)
2047 group->translate_notify (group->translate_data);
2049 group->translate_func = func;
2050 group->translate_data = data;
2051 group->translate_notify = destroy_notify;
2055 dgettext_swapped (const gchar *msgid,
2056 const gchar *domainname)
2058 return dgettext (domainname, msgid);
2062 * g_option_group_set_translation_domain:
2063 * @group: a #GOptionGroup
2064 * @domain: the domain to use
2066 * A convenience function to use gettext() for translating
2067 * user-visible strings.
2072 g_option_group_set_translation_domain (GOptionGroup *group,
2073 const gchar *domain)
2075 g_return_if_fail (group != NULL);
2077 g_option_group_set_translate_func (group,
2078 (GTranslateFunc)dgettext_swapped,
2084 * g_option_context_set_translate_func:
2085 * @context: a #GOptionContext
2086 * @func: the #GTranslateFunc, or %NULL
2087 * @data: user data to pass to @func, or %NULL
2088 * @destroy_notify: a function which gets called to free @data, or %NULL
2090 * Sets the function which is used to translate the contexts
2091 * user-visible strings, for <option>--help</option> output.
2092 * If @func is %NULL, strings are not translated.
2094 * Note that option groups have their own translation functions,
2095 * this function only affects the @parameter_string (see g_option_context_new()),
2096 * the summary (see g_option_context_set_summary()) and the description
2097 * (see g_option_context_set_description()).
2099 * If you are using gettext(), you only need to set the translation
2100 * domain, see g_context_group_set_translation_domain().
2105 g_option_context_set_translate_func (GOptionContext *context,
2106 GTranslateFunc func,
2108 GDestroyNotify destroy_notify)
2110 g_return_if_fail (context != NULL);
2112 if (context->translate_notify)
2113 context->translate_notify (context->translate_data);
2115 context->translate_func = func;
2116 context->translate_data = data;
2117 context->translate_notify = destroy_notify;
2121 * g_option_context_set_translation_domain:
2122 * @context: a #GOptionContext
2123 * @domain: the domain to use
2125 * A convenience function to use gettext() for translating
2126 * user-visible strings.
2131 g_option_context_set_translation_domain (GOptionContext *context,
2132 const gchar *domain)
2134 g_return_if_fail (context != NULL);
2136 g_option_context_set_translate_func (context,
2137 (GTranslateFunc)dgettext_swapped,
2143 * g_option_context_set_summary:
2144 * @context: a #GOptionContext
2145 * @summary: a string to be shown in <option>--help</option> output
2146 * before the list of options, or %NULL
2148 * Adds a string to be displayed in <option>--help</option> output
2149 * before the list of options. This is typically a summary of the
2150 * program functionality.
2152 * Note that the summary is translated (see
2153 * g_option_context_set_translate_func(), g_option_context_set_translation_domain()).
2158 g_option_context_set_summary (GOptionContext *context,
2159 const gchar *summary)
2161 g_return_if_fail (context != NULL);
2163 g_free (context->summary);
2164 context->summary = g_strdup (summary);
2169 * g_option_context_get_summary:
2170 * @context: a #GOptionContext
2172 * Returns the summary. See g_option_context_set_summary().
2174 * Returns: the summary
2178 G_CONST_RETURN gchar *
2179 g_option_context_get_summary (GOptionContext *context)
2181 g_return_val_if_fail (context != NULL, NULL);
2183 return context->summary;
2187 * g_option_context_set_description:
2188 * @context: a #GOptionContext
2189 * @description: a string to be shown in <option>--help</option> output
2190 * after the list of options, or %NULL
2192 * Adds a string to be displayed in <option>--help</option> output
2193 * after the list of options. This text often includes a bug reporting
2196 * Note that the summary is translated (see
2197 * g_option_context_set_translate_func()).
2202 g_option_context_set_description (GOptionContext *context,
2203 const gchar *description)
2205 g_return_if_fail (context != NULL);
2207 g_free (context->description);
2208 context->description = g_strdup (description);
2213 * g_option_context_get_description:
2214 * @context: a #GOptionContext
2216 * Returns the description. See g_option_context_set_description().
2218 * Returns: the description
2222 G_CONST_RETURN gchar *
2223 g_option_context_get_description (GOptionContext *context)
2225 g_return_val_if_fail (context != NULL, NULL);
2227 return context->description;
2231 #define __G_OPTION_C__
2232 #include "galiasdef.c"