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 (GOptionContext *context,
526 gboolean main_entries)
528 GOptionFlags reject_filter = G_OPTION_FLAG_HIDDEN;
531 gboolean main_group = group == context->main_group;
534 reject_filter |= G_OPTION_FLAG_IN_MAIN;
536 for (i = 0, l = (group ? group->n_entries : 0); i < l; i++)
538 entry = &group->entries[i];
540 if (main_entries && !main_group && !(entry->flags & G_OPTION_FLAG_IN_MAIN))
542 if (!(entry->flags & reject_filter))
550 group_list_has_visible_entires (GOptionContext *context,
552 gboolean main_entries)
556 if (group_has_visible_entries (context, group_list->data, main_entries))
559 group_list = group_list->next;
566 * g_option_context_get_help:
567 * @context: a #GOptionContext
568 * @main_help: if %TRUE, only include the main group
569 * @group: the #GOptionGroup to create help for, or %NULL
571 * Returns a formatted, translated help text for the given context.
572 * To obtain the text produced by <option>--help</option>, call
573 * <literal>g_option_context_get_help (context, TRUE, NULL)</literal>.
574 * To obtain the text produced by <option>--help-all</option>, call
575 * <literal>g_option_context_get_help (context, FALSE, NULL)</literal>.
576 * To obtain the help text for an option group, call
577 * <literal>g_option_context_get_help (context, FALSE, group)</literal>.
579 * Returns: A newly allocated string containing the help text
584 g_option_context_get_help (GOptionContext *context,
589 gint max_length, len;
592 GHashTable *shadow_map;
594 const gchar *rest_description;
597 string = g_string_sized_new (1024);
599 rest_description = NULL;
600 if (context->main_group)
603 for (i = 0; i < context->main_group->n_entries; i++)
605 entry = &context->main_group->entries[i];
606 if (entry->long_name[0] == 0)
608 rest_description = TRANSLATE (context->main_group, entry->arg_description);
614 g_string_append_printf (string, "%s\n %s %s",
615 _("Usage:"), g_get_prgname(), _("[OPTION...]"));
617 if (rest_description)
619 g_string_append (string, " ");
620 g_string_append (string, rest_description);
623 if (context->parameter_string)
625 g_string_append (string, " ");
626 g_string_append (string, TRANSLATE (context, context->parameter_string));
629 g_string_append (string, "\n\n");
631 if (context->summary)
633 g_string_append (string, TRANSLATE (context, context->summary));
634 g_string_append (string, "\n\n");
637 memset (seen, 0, sizeof (gboolean) * 256);
638 shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
640 if (context->main_group)
642 for (i = 0; i < context->main_group->n_entries; i++)
644 entry = &context->main_group->entries[i];
645 g_hash_table_insert (shadow_map,
646 (gpointer)entry->long_name,
649 if (seen[(guchar)entry->short_name])
650 entry->short_name = 0;
652 seen[(guchar)entry->short_name] = TRUE;
656 list = context->groups;
659 GOptionGroup *g = list->data;
660 for (i = 0; i < g->n_entries; i++)
662 entry = &g->entries[i];
663 if (g_hash_table_lookup (shadow_map, entry->long_name) &&
664 !(entry->flags & G_OPTION_FLAG_NOALIAS))
665 entry->long_name = g_strdup_printf ("%s-%s", g->name, entry->long_name);
667 g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
669 if (seen[(guchar)entry->short_name] &&
670 !(entry->flags & G_OPTION_FLAG_NOALIAS))
671 entry->short_name = 0;
673 seen[(guchar)entry->short_name] = TRUE;
678 g_hash_table_destroy (shadow_map);
680 list = context->groups;
682 max_length = _g_utf8_strwidth ("-?, --help", -1);
686 len = _g_utf8_strwidth ("--help-all", -1);
687 max_length = MAX (max_length, len);
690 if (context->main_group)
692 len = calculate_max_length (context->main_group);
693 max_length = MAX (max_length, len);
698 GOptionGroup *g = list->data;
700 /* First, we check the --help-<groupname> options */
701 len = _g_utf8_strwidth ("--help-", -1) + _g_utf8_strwidth (g->name, -1);
702 max_length = MAX (max_length, len);
704 /* Then we go through the entries */
705 len = calculate_max_length (g);
706 max_length = MAX (max_length, len);
711 /* Add a bit of padding */
716 list = context->groups;
718 g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
719 _("Help Options:"), '?', max_length - 4, "help",
720 _("Show help options"));
722 /* We only want --help-all when there are groups */
724 g_string_append_printf (string, " --%-*s %s\n",
725 max_length, "help-all",
726 _("Show all help options"));
730 GOptionGroup *g = list->data;
732 if (group_has_visible_entries (context, g, FALSE))
733 g_string_append_printf (string, " --help-%-*s %s\n",
734 max_length - 5, g->name,
735 TRANSLATE (g, g->help_description));
740 g_string_append (string, "\n");
745 /* Print a certain group */
747 if (group_has_visible_entries (context, group, FALSE))
749 g_string_append (string, TRANSLATE (group, group->description));
750 g_string_append (string, "\n");
751 for (i = 0; i < group->n_entries; i++)
752 print_entry (group, max_length, &group->entries[i], string);
753 g_string_append (string, "\n");
758 /* Print all groups */
760 list = context->groups;
764 GOptionGroup *g = list->data;
766 if (group_has_visible_entries (context, g, FALSE))
768 g_string_append (string, g->description);
769 g_string_append (string, "\n");
770 for (i = 0; i < g->n_entries; i++)
771 if (!(g->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
772 print_entry (g, max_length, &g->entries[i], string);
774 g_string_append (string, "\n");
781 /* Print application options if --help or --help-all has been specified */
782 if ((main_help || !group) &&
783 (group_has_visible_entries (context, context->main_group, TRUE) ||
784 group_list_has_visible_entires (context, context->groups, TRUE)))
786 list = context->groups;
788 g_string_append (string, _("Application Options:"));
789 g_string_append (string, "\n");
790 if (context->main_group)
791 for (i = 0; i < context->main_group->n_entries; i++)
792 print_entry (context->main_group, max_length,
793 &context->main_group->entries[i], string);
797 GOptionGroup *g = list->data;
799 /* Print main entries from other groups */
800 for (i = 0; i < g->n_entries; i++)
801 if (g->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
802 print_entry (g, max_length, &g->entries[i], string);
807 g_string_append (string, "\n");
810 if (context->description)
812 g_string_append (string, TRANSLATE (context, context->description));
813 g_string_append (string, "\n");
816 return g_string_free (string, FALSE);
821 print_help (GOptionContext *context,
827 help = g_option_context_get_help (context, main_help, group);
828 g_print ("%s", help);
835 parse_int (const gchar *arg_name,
844 tmp = strtol (arg, &end, 0);
846 if (*arg == '\0' || *end != '\0')
849 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
850 _("Cannot parse integer value '%s' for %s"),
856 if (*result != tmp || errno == ERANGE)
859 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
860 _("Integer value '%s' for %s out of range"),
870 parse_double (const gchar *arg_name,
879 tmp = g_strtod (arg, &end);
881 if (*arg == '\0' || *end != '\0')
884 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
885 _("Cannot parse double value '%s' for %s"),
892 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
893 _("Double value '%s' for %s out of range"),
905 parse_int64 (const gchar *arg_name,
914 tmp = g_ascii_strtoll (arg, &end, 0);
916 if (*arg == '\0' || *end != '\0')
919 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
920 _("Cannot parse integer value '%s' for %s"),
927 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
928 _("Integer value '%s' for %s out of range"),
940 get_change (GOptionContext *context,
945 Change *change = NULL;
947 for (list = context->changes; list != NULL; list = list->next)
951 if (change->arg_data == arg_data)
955 change = g_new0 (Change, 1);
956 change->arg_type = arg_type;
957 change->arg_data = arg_data;
959 context->changes = g_list_prepend (context->changes, change);
967 add_pending_null (GOptionContext *context,
973 n = g_new0 (PendingNull, 1);
977 context->pending_nulls = g_list_prepend (context->pending_nulls, n);
981 parse_arg (GOptionContext *context,
985 const gchar *option_name,
991 g_assert (value || OPTIONAL_ARG (entry) || NO_ARG (entry));
995 case G_OPTION_ARG_NONE:
997 change = get_change (context, G_OPTION_ARG_NONE,
1000 *(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
1003 case G_OPTION_ARG_STRING:
1007 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1012 change = get_change (context, G_OPTION_ARG_STRING,
1014 g_free (change->allocated.str);
1016 change->prev.str = *(gchar **)entry->arg_data;
1017 change->allocated.str = data;
1019 *(gchar **)entry->arg_data = data;
1022 case G_OPTION_ARG_STRING_ARRAY:
1026 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1031 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1034 if (change->allocated.array.len == 0)
1036 change->prev.array = *(gchar ***)entry->arg_data;
1037 change->allocated.array.data = g_new (gchar *, 2);
1040 change->allocated.array.data =
1041 g_renew (gchar *, change->allocated.array.data,
1042 change->allocated.array.len + 2);
1044 change->allocated.array.data[change->allocated.array.len] = data;
1045 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1047 change->allocated.array.len ++;
1049 *(gchar ***)entry->arg_data = change->allocated.array.data;
1054 case G_OPTION_ARG_FILENAME:
1059 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1064 data = g_strdup (value);
1066 change = get_change (context, G_OPTION_ARG_FILENAME,
1068 g_free (change->allocated.str);
1070 change->prev.str = *(gchar **)entry->arg_data;
1071 change->allocated.str = data;
1073 *(gchar **)entry->arg_data = data;
1077 case G_OPTION_ARG_FILENAME_ARRAY:
1082 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1087 data = g_strdup (value);
1089 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1092 if (change->allocated.array.len == 0)
1094 change->prev.array = *(gchar ***)entry->arg_data;
1095 change->allocated.array.data = g_new (gchar *, 2);
1098 change->allocated.array.data =
1099 g_renew (gchar *, change->allocated.array.data,
1100 change->allocated.array.len + 2);
1102 change->allocated.array.data[change->allocated.array.len] = data;
1103 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1105 change->allocated.array.len ++;
1107 *(gchar ***)entry->arg_data = change->allocated.array.data;
1112 case G_OPTION_ARG_INT:
1116 if (!parse_int (option_name, value,
1121 change = get_change (context, G_OPTION_ARG_INT,
1123 change->prev.integer = *(gint *)entry->arg_data;
1124 *(gint *)entry->arg_data = data;
1127 case G_OPTION_ARG_CALLBACK:
1132 if (!value && entry->flags & G_OPTION_FLAG_OPTIONAL_ARG)
1134 else if (entry->flags & G_OPTION_FLAG_NO_ARG)
1136 else if (entry->flags & G_OPTION_FLAG_FILENAME)
1139 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1141 data = g_strdup (value);
1145 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1147 if (!(entry->flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG)) &&
1151 retval = (* (GOptionArgFunc) entry->arg_data) (option_name, data, group->user_data, error);
1159 case G_OPTION_ARG_DOUBLE:
1163 if (!parse_double (option_name, value,
1170 change = get_change (context, G_OPTION_ARG_DOUBLE,
1172 change->prev.dbl = *(gdouble *)entry->arg_data;
1173 *(gdouble *)entry->arg_data = data;
1176 case G_OPTION_ARG_INT64:
1180 if (!parse_int64 (option_name, value,
1187 change = get_change (context, G_OPTION_ARG_INT64,
1189 change->prev.int64 = *(gint64 *)entry->arg_data;
1190 *(gint64 *)entry->arg_data = data;
1194 g_assert_not_reached ();
1201 parse_short_option (GOptionContext *context,
1202 GOptionGroup *group,
1213 for (j = 0; j < group->n_entries; j++)
1215 if (arg == group->entries[j].short_name)
1218 gchar *value = NULL;
1220 option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
1222 if (NO_ARG (&group->entries[j]))
1229 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1230 _("Error parsing option %s"), option_name);
1231 g_free (option_name);
1235 if (idx < *argc - 1)
1237 if (!OPTIONAL_ARG (&group->entries[j]))
1239 value = (*argv)[idx + 1];
1240 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1245 if ((*argv)[idx + 1][0] == '-')
1249 value = (*argv)[idx + 1];
1250 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1255 else if (idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
1260 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1261 _("Missing argument for %s"), option_name);
1262 g_free (option_name);
1267 if (!parse_arg (context, group, &group->entries[j],
1268 value, option_name, error))
1270 g_free (option_name);
1274 g_free (option_name);
1283 parse_long_option (GOptionContext *context,
1284 GOptionGroup *group,
1295 for (j = 0; j < group->n_entries; j++)
1300 if (aliased && (group->entries[j].flags & G_OPTION_FLAG_NOALIAS))
1303 if (NO_ARG (&group->entries[j]) &&
1304 strcmp (arg, group->entries[j].long_name) == 0)
1309 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1310 retval = parse_arg (context, group, &group->entries[j],
1311 NULL, option_name, error);
1312 g_free(option_name);
1314 add_pending_null (context, &((*argv)[*idx]), NULL);
1321 gint len = strlen (group->entries[j].long_name);
1323 if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
1324 (arg[len] == '=' || arg[len] == 0))
1326 gchar *value = NULL;
1329 add_pending_null (context, &((*argv)[*idx]), NULL);
1330 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1332 if (arg[len] == '=')
1333 value = arg + len + 1;
1334 else if (*idx < *argc - 1)
1336 if (!(group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG))
1338 value = (*argv)[*idx + 1];
1339 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1344 if ((*argv)[*idx + 1][0] == '-')
1347 retval = parse_arg (context, group, &group->entries[j],
1348 NULL, option_name, error);
1350 g_free (option_name);
1355 value = (*argv)[*idx + 1];
1356 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1361 else if (*idx >= *argc - 1 &&
1362 group->entries[j].flags & G_OPTION_FLAG_OPTIONAL_ARG)
1365 retval = parse_arg (context, group, &group->entries[j],
1366 NULL, option_name, error);
1368 g_free (option_name);
1374 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1375 _("Missing argument for %s"), option_name);
1376 g_free (option_name);
1380 if (!parse_arg (context, group, &group->entries[j],
1381 value, option_name, error))
1383 g_free (option_name);
1387 g_free (option_name);
1397 parse_remaining_arg (GOptionContext *context,
1398 GOptionGroup *group,
1407 for (j = 0; j < group->n_entries; j++)
1412 if (group->entries[j].long_name[0])
1415 g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_CALLBACK ||
1416 group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
1417 group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
1419 add_pending_null (context, &((*argv)[*idx]), NULL);
1421 if (!parse_arg (context, group, &group->entries[j], (*argv)[*idx], "", error))
1432 free_changes_list (GOptionContext *context,
1437 for (list = context->changes; list != NULL; list = list->next)
1439 Change *change = list->data;
1443 switch (change->arg_type)
1445 case G_OPTION_ARG_NONE:
1446 *(gboolean *)change->arg_data = change->prev.bool;
1448 case G_OPTION_ARG_INT:
1449 *(gint *)change->arg_data = change->prev.integer;
1451 case G_OPTION_ARG_STRING:
1452 case G_OPTION_ARG_FILENAME:
1453 g_free (change->allocated.str);
1454 *(gchar **)change->arg_data = change->prev.str;
1456 case G_OPTION_ARG_STRING_ARRAY:
1457 case G_OPTION_ARG_FILENAME_ARRAY:
1458 g_strfreev (change->allocated.array.data);
1459 *(gchar ***)change->arg_data = change->prev.array;
1461 case G_OPTION_ARG_DOUBLE:
1462 *(gdouble *)change->arg_data = change->prev.dbl;
1464 case G_OPTION_ARG_INT64:
1465 *(gint64 *)change->arg_data = change->prev.int64;
1468 g_assert_not_reached ();
1475 g_list_free (context->changes);
1476 context->changes = NULL;
1480 free_pending_nulls (GOptionContext *context,
1481 gboolean perform_nulls)
1485 for (list = context->pending_nulls; list != NULL; list = list->next)
1487 PendingNull *n = list->data;
1493 /* Copy back the short options */
1495 strcpy (*n->ptr + 1, n->value);
1505 g_list_free (context->pending_nulls);
1506 context->pending_nulls = NULL;
1510 * g_option_context_parse:
1511 * @context: a #GOptionContext
1512 * @argc: a pointer to the number of command line arguments
1513 * @argv: a pointer to the array of command line arguments
1514 * @error: a return location for errors
1516 * Parses the command line arguments, recognizing options
1517 * which have been added to @context. A side-effect of
1518 * calling this function is that g_set_prgname() will be
1521 * If the parsing is successful, any parsed arguments are
1522 * removed from the array and @argc and @argv are updated
1523 * accordingly. A '--' option is stripped from @argv
1524 * unless there are unparsed options before and after it,
1525 * or some of the options after it start with '-'. In case
1526 * of an error, @argc and @argv are left unmodified.
1528 * If automatic <option>--help</option> support is enabled
1529 * (see g_option_context_set_help_enabled()), and the
1530 * @argv array contains one of the recognized help options,
1531 * this function will produce help output to stdout and
1532 * call <literal>exit (0)</literal>.
1534 * Note that function depends on the
1535 * <link linkend="setlocale">current locale</link> for
1536 * automatic character set conversion of string and filename
1539 * Return value: %TRUE if the parsing was successful,
1540 * %FALSE if an error occurred
1545 g_option_context_parse (GOptionContext *context,
1553 /* Set program name */
1554 if (!g_get_prgname())
1556 if (argc && argv && *argc)
1560 prgname = g_path_get_basename ((*argv)[0]);
1561 g_set_prgname (prgname);
1565 g_set_prgname ("<unknown>");
1568 /* Call pre-parse hooks */
1569 list = context->groups;
1572 GOptionGroup *group = list->data;
1574 if (group->pre_parse_func)
1576 if (!(* group->pre_parse_func) (context, group,
1577 group->user_data, error))
1584 if (context->main_group && context->main_group->pre_parse_func)
1586 if (!(* context->main_group->pre_parse_func) (context, context->main_group,
1587 context->main_group->user_data, error))
1593 gboolean stop_parsing = FALSE;
1594 gboolean has_unknown = FALSE;
1595 gint separator_pos = 0;
1597 for (i = 1; i < *argc; i++)
1600 gboolean parsed = FALSE;
1602 if ((*argv)[i][0] == '-' && (*argv)[i][1] != '\0' && !stop_parsing)
1604 if ((*argv)[i][1] == '-')
1608 arg = (*argv)[i] + 2;
1610 /* '--' terminates list of arguments */
1614 stop_parsing = TRUE;
1618 /* Handle help options */
1619 if (context->help_enabled)
1621 if (strcmp (arg, "help") == 0)
1622 print_help (context, TRUE, NULL);
1623 else if (strcmp (arg, "help-all") == 0)
1624 print_help (context, FALSE, NULL);
1625 else if (strncmp (arg, "help-", 5) == 0)
1627 list = context->groups;
1631 GOptionGroup *group = list->data;
1633 if (strcmp (arg + 5, group->name) == 0)
1634 print_help (context, FALSE, group);
1641 if (context->main_group &&
1642 !parse_long_option (context, context->main_group, &i, arg,
1643 FALSE, argc, argv, error, &parsed))
1649 /* Try the groups */
1650 list = context->groups;
1653 GOptionGroup *group = list->data;
1655 if (!parse_long_option (context, group, &i, arg,
1656 FALSE, argc, argv, error, &parsed))
1668 /* Now look for --<group>-<option> */
1669 dash = strchr (arg, '-');
1672 /* Try the groups */
1673 list = context->groups;
1676 GOptionGroup *group = list->data;
1678 if (strncmp (group->name, arg, dash - arg) == 0)
1680 if (!parse_long_option (context, group, &i, dash + 1,
1681 TRUE, argc, argv, error, &parsed))
1692 if (context->ignore_unknown)
1696 { /* short option */
1697 gint new_i = i, arg_length;
1698 gboolean *nulled_out = NULL;
1699 arg = (*argv)[i] + 1;
1700 arg_length = strlen (arg);
1701 nulled_out = g_newa (gboolean, arg_length);
1702 memset (nulled_out, 0, arg_length * sizeof (gboolean));
1703 for (j = 0; j < arg_length; j++)
1705 if (context->help_enabled && arg[j] == '?')
1706 print_help (context, TRUE, NULL);
1708 if (context->main_group &&
1709 !parse_short_option (context, context->main_group,
1711 argc, argv, error, &parsed))
1715 /* Try the groups */
1716 list = context->groups;
1719 GOptionGroup *group = list->data;
1720 if (!parse_short_option (context, group, i, &new_i, arg[j],
1721 argc, argv, error, &parsed))
1729 if (context->ignore_unknown && parsed)
1730 nulled_out[j] = TRUE;
1731 else if (context->ignore_unknown)
1735 /* !context->ignore_unknown && parsed */
1737 if (context->ignore_unknown)
1739 gchar *new_arg = NULL;
1741 for (j = 0; j < arg_length; j++)
1746 new_arg = g_malloc (arg_length + 1);
1747 new_arg[arg_index++] = arg[j];
1751 new_arg[arg_index] = '\0';
1752 add_pending_null (context, &((*argv)[i]), new_arg);
1756 add_pending_null (context, &((*argv)[i]), NULL);
1764 if (!parsed && !context->ignore_unknown)
1767 G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1768 _("Unknown option %s"), (*argv)[i]);
1774 /* Collect remaining args */
1775 if (context->main_group &&
1776 !parse_remaining_arg (context, context->main_group, &i,
1777 argc, argv, error, &parsed))
1780 if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
1785 if (separator_pos > 0)
1786 add_pending_null (context, &((*argv)[separator_pos]), NULL);
1790 /* Call post-parse hooks */
1791 list = context->groups;
1794 GOptionGroup *group = list->data;
1796 if (group->post_parse_func)
1798 if (!(* group->post_parse_func) (context, group,
1799 group->user_data, error))
1806 if (context->main_group && context->main_group->post_parse_func)
1808 if (!(* context->main_group->post_parse_func) (context, context->main_group,
1809 context->main_group->user_data, error))
1815 free_pending_nulls (context, TRUE);
1817 for (i = 1; i < *argc; i++)
1819 for (k = i; k < *argc; k++)
1820 if ((*argv)[k] != NULL)
1826 for (j = i + k; j < *argc; j++)
1828 (*argv)[j-k] = (*argv)[j];
1840 /* Call error hooks */
1841 list = context->groups;
1844 GOptionGroup *group = list->data;
1846 if (group->error_func)
1847 (* group->error_func) (context, group,
1848 group->user_data, error);
1853 if (context->main_group && context->main_group->error_func)
1854 (* context->main_group->error_func) (context, context->main_group,
1855 context->main_group->user_data, error);
1857 free_changes_list (context, TRUE);
1858 free_pending_nulls (context, FALSE);
1864 * g_option_group_new:
1865 * @name: the name for the option group, this is used to provide
1866 * help for the options in this group with <option>--help-</option>@name
1867 * @description: a description for this group to be shown in
1868 * <option>--help</option>. This string is translated using the translation
1869 * domain or translation function of the group
1870 * @help_description: a description for the <option>--help-</option>@name option.
1871 * This string is translated using the translation domain or translation function
1873 * @user_data: user data that will be passed to the pre- and post-parse hooks,
1874 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
1875 * @destroy: a function that will be called to free @user_data, or %NULL
1877 * Creates a new #GOptionGroup.
1879 * Return value: a newly created option group. It should be added
1880 * to a #GOptionContext or freed with g_option_group_free().
1885 g_option_group_new (const gchar *name,
1886 const gchar *description,
1887 const gchar *help_description,
1889 GDestroyNotify destroy)
1892 GOptionGroup *group;
1894 group = g_new0 (GOptionGroup, 1);
1895 group->name = g_strdup (name);
1896 group->description = g_strdup (description);
1897 group->help_description = g_strdup (help_description);
1898 group->user_data = user_data;
1899 group->destroy_notify = destroy;
1906 * g_option_group_free:
1907 * @group: a #GOptionGroup
1909 * Frees a #GOptionGroup. Note that you must <emphasis>not</emphasis>
1910 * free groups which have been added to a #GOptionContext.
1915 g_option_group_free (GOptionGroup *group)
1917 g_return_if_fail (group != NULL);
1919 g_free (group->name);
1920 g_free (group->description);
1921 g_free (group->help_description);
1923 g_free (group->entries);
1925 if (group->destroy_notify)
1926 (* group->destroy_notify) (group->user_data);
1928 if (group->translate_notify)
1929 (* group->translate_notify) (group->translate_data);
1936 * g_option_group_add_entries:
1937 * @group: a #GOptionGroup
1938 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
1940 * Adds the options specified in @entries to @group.
1945 g_option_group_add_entries (GOptionGroup *group,
1946 const GOptionEntry *entries)
1950 g_return_if_fail (entries != NULL);
1952 for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++) ;
1954 group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
1956 memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
1958 for (i = group->n_entries; i < group->n_entries + n_entries; i++)
1960 gchar c = group->entries[i].short_name;
1964 if (c == '-' || !g_ascii_isprint (c))
1966 g_warning (G_STRLOC": ignoring invalid short option '%c' (%d)", c, c);
1967 group->entries[i].short_name = 0;
1972 group->n_entries += n_entries;
1976 * g_option_group_set_parse_hooks:
1977 * @group: a #GOptionGroup
1978 * @pre_parse_func: a function to call before parsing, or %NULL
1979 * @post_parse_func: a function to call after parsing, or %NULL
1981 * Associates two functions with @group which will be called
1982 * from g_option_context_parse() before the first option is parsed
1983 * and after the last option has been parsed, respectively.
1985 * Note that the user data to be passed to @pre_parse_func and
1986 * @post_parse_func can be specified when constructing the group
1987 * with g_option_group_new().
1992 g_option_group_set_parse_hooks (GOptionGroup *group,
1993 GOptionParseFunc pre_parse_func,
1994 GOptionParseFunc post_parse_func)
1996 g_return_if_fail (group != NULL);
1998 group->pre_parse_func = pre_parse_func;
1999 group->post_parse_func = post_parse_func;
2003 * g_option_group_set_error_hook:
2004 * @group: a #GOptionGroup
2005 * @error_func: a function to call when an error occurs
2007 * Associates a function with @group which will be called
2008 * from g_option_context_parse() when an error occurs.
2010 * Note that the user data to be passed to @error_func can be
2011 * specified when constructing the group with g_option_group_new().
2016 g_option_group_set_error_hook (GOptionGroup *group,
2017 GOptionErrorFunc error_func)
2019 g_return_if_fail (group != NULL);
2021 group->error_func = error_func;
2026 * g_option_group_set_translate_func:
2027 * @group: a #GOptionGroup
2028 * @func: the #GTranslateFunc, or %NULL
2029 * @data: user data to pass to @func, or %NULL
2030 * @destroy_notify: a function which gets called to free @data, or %NULL
2032 * Sets the function which is used to translate user-visible
2033 * strings, for <option>--help</option> output. Different
2034 * groups can use different #GTranslateFunc<!-- -->s. If @func
2035 * is %NULL, strings are not translated.
2037 * If you are using gettext(), you only need to set the translation
2038 * domain, see g_option_group_set_translation_domain().
2043 g_option_group_set_translate_func (GOptionGroup *group,
2044 GTranslateFunc func,
2046 GDestroyNotify destroy_notify)
2048 g_return_if_fail (group != NULL);
2050 if (group->translate_notify)
2051 group->translate_notify (group->translate_data);
2053 group->translate_func = func;
2054 group->translate_data = data;
2055 group->translate_notify = destroy_notify;
2058 static const gchar *
2059 dgettext_swapped (const gchar *msgid,
2060 const gchar *domainname)
2062 return g_dgettext (domainname, msgid);
2066 * g_option_group_set_translation_domain:
2067 * @group: a #GOptionGroup
2068 * @domain: the domain to use
2070 * A convenience function to use gettext() for translating
2071 * user-visible strings.
2076 g_option_group_set_translation_domain (GOptionGroup *group,
2077 const gchar *domain)
2079 g_return_if_fail (group != NULL);
2081 g_option_group_set_translate_func (group,
2082 (GTranslateFunc)dgettext_swapped,
2088 * g_option_context_set_translate_func:
2089 * @context: a #GOptionContext
2090 * @func: the #GTranslateFunc, or %NULL
2091 * @data: user data to pass to @func, or %NULL
2092 * @destroy_notify: a function which gets called to free @data, or %NULL
2094 * Sets the function which is used to translate the contexts
2095 * user-visible strings, for <option>--help</option> output.
2096 * If @func is %NULL, strings are not translated.
2098 * Note that option groups have their own translation functions,
2099 * this function only affects the @parameter_string (see g_option_context_new()),
2100 * the summary (see g_option_context_set_summary()) and the description
2101 * (see g_option_context_set_description()).
2103 * If you are using gettext(), you only need to set the translation
2104 * domain, see g_option_context_set_translation_domain().
2109 g_option_context_set_translate_func (GOptionContext *context,
2110 GTranslateFunc func,
2112 GDestroyNotify destroy_notify)
2114 g_return_if_fail (context != NULL);
2116 if (context->translate_notify)
2117 context->translate_notify (context->translate_data);
2119 context->translate_func = func;
2120 context->translate_data = data;
2121 context->translate_notify = destroy_notify;
2125 * g_option_context_set_translation_domain:
2126 * @context: a #GOptionContext
2127 * @domain: the domain to use
2129 * A convenience function to use gettext() for translating
2130 * user-visible strings.
2135 g_option_context_set_translation_domain (GOptionContext *context,
2136 const gchar *domain)
2138 g_return_if_fail (context != NULL);
2140 g_option_context_set_translate_func (context,
2141 (GTranslateFunc)dgettext_swapped,
2147 * g_option_context_set_summary:
2148 * @context: a #GOptionContext
2149 * @summary: a string to be shown in <option>--help</option> output
2150 * before the list of options, or %NULL
2152 * Adds a string to be displayed in <option>--help</option> output
2153 * before the list of options. This is typically a summary of the
2154 * program functionality.
2156 * Note that the summary is translated (see
2157 * g_option_context_set_translate_func() and
2158 * g_option_context_set_translation_domain()).
2163 g_option_context_set_summary (GOptionContext *context,
2164 const gchar *summary)
2166 g_return_if_fail (context != NULL);
2168 g_free (context->summary);
2169 context->summary = g_strdup (summary);
2174 * g_option_context_get_summary:
2175 * @context: a #GOptionContext
2177 * Returns the summary. See g_option_context_set_summary().
2179 * Returns: the summary
2183 G_CONST_RETURN gchar *
2184 g_option_context_get_summary (GOptionContext *context)
2186 g_return_val_if_fail (context != NULL, NULL);
2188 return context->summary;
2192 * g_option_context_set_description:
2193 * @context: a #GOptionContext
2194 * @description: a string to be shown in <option>--help</option> output
2195 * after the list of options, or %NULL
2197 * Adds a string to be displayed in <option>--help</option> output
2198 * after the list of options. This text often includes a bug reporting
2201 * Note that the summary is translated (see
2202 * g_option_context_set_translate_func()).
2207 g_option_context_set_description (GOptionContext *context,
2208 const gchar *description)
2210 g_return_if_fail (context != NULL);
2212 g_free (context->description);
2213 context->description = g_strdup (description);
2218 * g_option_context_get_description:
2219 * @context: a #GOptionContext
2221 * Returns the description. See g_option_context_set_description().
2223 * Returns: the description
2227 G_CONST_RETURN gchar *
2228 g_option_context_get_description (GOptionContext *context)
2230 g_return_val_if_fail (context != NULL, NULL);
2232 return context->description;
2236 #define __G_OPTION_C__
2237 #include "galiasdef.c"