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.
34 #define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
60 struct _GOptionContext
64 gchar *parameter_string;
66 gboolean help_enabled;
67 gboolean ignore_unknown;
69 GOptionGroup *main_group;
71 /* We keep a list of change so we can revert them */
74 /* We also keep track of all argv elements that should be NULLed or
84 gchar *help_description;
86 GDestroyNotify destroy_notify;
89 GTranslateFunc translate_func;
90 GDestroyNotify translate_notify;
91 gpointer translate_data;
93 GOptionEntry *entries;
96 GOptionParseFunc pre_parse_func;
97 GOptionParseFunc post_parse_func;
98 GOptionErrorFunc error_func;
101 static void free_changes_list (GOptionContext *context,
103 static void free_pending_nulls (GOptionContext *context,
104 gboolean perform_nulls);
107 g_option_error_quark (void)
112 q = g_quark_from_static_string ("g-option-context-error-quark");
118 * g_option_context_new:
119 * @parameter_string: a string which is displayed in
120 * the first line of <option>--help</option> output, after
121 * <literal><replaceable>programname</replaceable> [OPTION...]</literal>
123 * Creates a new option context.
125 * Returns: a newly created #GOptionContext, which must be
126 * freed with g_option_context_free() after use.
131 g_option_context_new (const gchar *parameter_string)
134 GOptionContext *context;
136 context = g_new0 (GOptionContext, 1);
138 context->parameter_string = g_strdup (parameter_string);
139 context->help_enabled = TRUE;
140 context->ignore_unknown = FALSE;
146 * g_option_context_free:
147 * @context: a #GOptionContext
149 * Frees context and all the groups which have been
154 void g_option_context_free (GOptionContext *context)
156 g_return_if_fail (context != NULL);
158 g_list_foreach (context->groups, (GFunc)g_option_group_free, NULL);
159 g_list_free (context->groups);
161 if (context->main_group)
162 g_option_group_free (context->main_group);
164 free_changes_list (context, FALSE);
165 free_pending_nulls (context, FALSE);
167 g_free (context->parameter_string);
174 * g_option_context_set_help_enabled:
175 * @context: a #GOptionContext
176 * @help_enabled: %TRUE to enable <option>--help</option>, %FALSE to disable it
178 * Enables or disables automatic generation of <option>--help</option>
179 * output. By default, g_option_context_parse() recognizes
180 * <option>--help</option>, <option>-?</option>, <option>--help-all</option>
181 * and <option>--help-</option><replaceable>groupname</replaceable> and creates
182 * suitable output to stdout.
186 void g_option_context_set_help_enabled (GOptionContext *context,
187 gboolean help_enabled)
190 g_return_if_fail (context != NULL);
192 context->help_enabled = help_enabled;
196 * g_option_context_get_help_enabled:
197 * @context: a #GOptionContext
199 * Returns whether automatic <option>--help</option> generation
200 * is turned on for @context. See g_option_context_set_help_enabled().
202 * Returns: %TRUE if automatic help generation is turned on.
207 g_option_context_get_help_enabled (GOptionContext *context)
209 g_return_val_if_fail (context != NULL, FALSE);
211 return context->help_enabled;
215 * g_option_context_set_ignore_unknown_options:
216 * @context: a #GOptionContext
217 * @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
218 * an error when unknown options are met
220 * Sets whether to ignore unknown options or not. If an argument is
221 * ignored, it is left in the @argv array after parsing. By default,
222 * g_option_context_parse() treats unknown options as error.
224 * This setting does not affect non-option arguments (i.e. arguments
225 * which don't start with a dash). But note that GOption cannot reliably
226 * determine whether a non-option belongs to a preceding unknown option.
231 g_option_context_set_ignore_unknown_options (GOptionContext *context,
232 gboolean ignore_unknown)
234 g_return_if_fail (context != NULL);
236 context->ignore_unknown = ignore_unknown;
240 * g_option_context_get_ignore_unknown_options:
241 * @context: a #GOptionContext
243 * Returns whether unknown options are ignored or not. See
244 * g_option_context_set_ignore_unknown_options().
246 * Returns: %TRUE if unknown options are ignored.
251 g_option_context_get_ignore_unknown_options (GOptionContext *context)
253 g_return_val_if_fail (context != NULL, FALSE);
255 return context->ignore_unknown;
259 * g_option_context_add_group:
260 * @context: a #GOptionContext
261 * @group: the group to add
263 * Adds a #GOptionGroup to the @context, so that parsing with @context
264 * will recognize the options in the group. Note that the group will
265 * be freed together with the context when g_option_context_free() is
266 * called, so you must not free the group yourself after adding it
272 g_option_context_add_group (GOptionContext *context,
277 g_return_if_fail (context != NULL);
278 g_return_if_fail (group != NULL);
279 g_return_if_fail (group->name != NULL);
280 g_return_if_fail (group->description != NULL);
281 g_return_if_fail (group->help_description != NULL);
283 for (list = context->groups; list; list = list->next)
285 GOptionGroup *g = (GOptionGroup *)list->data;
287 if ((group->name == NULL && g->name == NULL) ||
288 (group->name && g->name && strcmp (group->name, g->name) == 0))
289 g_warning ("A group named \"%s\" is already part of this GOptionContext",
293 context->groups = g_list_append (context->groups, group);
297 * g_option_context_set_main_group:
298 * @context: a #GOptionContext
299 * @group: the group to set as main group
301 * Sets a #GOptionGroup as main group of the @context.
302 * This has the same effect as calling g_option_context_add_group(),
303 * the only difference is that the options in the main group are
304 * treated differently when generating <option>--help</option> output.
309 g_option_context_set_main_group (GOptionContext *context,
312 g_return_if_fail (context != NULL);
313 g_return_if_fail (group != NULL);
315 context->main_group = group;
319 * g_option_context_get_main_group:
320 * @context: a #GOptionContext
322 * Returns a pointer to the main group of @context.
324 * Return value: the main group of @context, or %NULL if @context doesn't
325 * have a main group. Note that group belongs to @context and should
326 * not be modified or freed.
331 g_option_context_get_main_group (GOptionContext *context)
333 g_return_val_if_fail (context != NULL, NULL);
335 return context->main_group;
339 * g_option_context_add_main_entries:
340 * @context: a #GOptionContext
341 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
342 * @translation_domain: a translation domain to use for translating
343 * the <option>--help</option> output for the options in @entries
344 * with gettext(), or %NULL
346 * A convenience function which creates a main group if it doesn't
347 * exist, adds the @entries to it and sets the translation domain.
352 g_option_context_add_main_entries (GOptionContext *context,
353 const GOptionEntry *entries,
354 const gchar *translation_domain)
356 g_return_if_fail (entries != NULL);
358 if (!context->main_group)
359 context->main_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
361 g_option_group_add_entries (context->main_group, entries);
362 g_option_group_set_translation_domain (context->main_group, translation_domain);
366 calculate_max_length (GOptionGroup *group)
369 gint i, len, max_length;
373 for (i = 0; i < group->n_entries; i++)
375 entry = &group->entries[i];
377 if (entry->flags & G_OPTION_FLAG_HIDDEN)
380 len = g_utf8_strlen (entry->long_name, -1);
382 if (entry->short_name)
385 if (entry->arg != G_OPTION_ARG_NONE && entry->arg_description)
386 len += 1 + g_utf8_strlen (TRANSLATE (group, entry->arg_description), -1);
388 max_length = MAX (max_length, len);
395 print_entry (GOptionGroup *group,
397 const GOptionEntry *entry)
401 if (entry->flags & G_OPTION_FLAG_HIDDEN)
404 if (entry->long_name[0] == 0)
407 str = g_string_new (NULL);
409 if (entry->short_name)
410 g_string_append_printf (str, " -%c, --%s", entry->short_name, entry->long_name);
412 g_string_append_printf (str, " --%s", entry->long_name);
414 if (entry->arg_description)
415 g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
417 g_print ("%-*s %s\n", max_length + 4, str->str,
418 entry->description ? TRANSLATE (group, entry->description) : "");
419 g_string_free (str, TRUE);
423 print_help (GOptionContext *context,
428 gint max_length, len;
431 GHashTable *shadow_map;
434 g_print ("%s\n %s %s %s\n\n",
435 _("Usage:"), g_get_prgname(), _("[OPTION...]"),
436 context->parameter_string ? context->parameter_string : "");
438 memset (seen, 0, sizeof (gboolean) * 256);
439 shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
441 if (context->main_group)
443 for (i = 0; i < context->main_group->n_entries; i++)
445 entry = &context->main_group->entries[i];
446 g_hash_table_insert (shadow_map,
447 (gpointer)entry->long_name,
450 if (seen[(guchar)entry->short_name])
451 entry->short_name = 0;
453 seen[(guchar)entry->short_name] = TRUE;
457 list = context->groups;
460 GOptionGroup *group = list->data;
461 for (i = 0; i < group->n_entries; i++)
463 entry = &group->entries[i];
464 if (g_hash_table_lookup (shadow_map, entry->long_name))
465 entry->long_name = g_strdup_printf ("%s-%s", group->name, entry->long_name);
467 g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
469 if (seen[(guchar)entry->short_name])
470 entry->short_name = 0;
472 seen[(guchar)entry->short_name] = TRUE;
477 g_hash_table_destroy (shadow_map);
479 list = context->groups;
481 max_length = g_utf8_strlen ("-?, --help", -1);
485 len = g_utf8_strlen ("--help-all", -1);
486 max_length = MAX (max_length, len);
489 if (context->main_group)
491 len = calculate_max_length (context->main_group);
492 max_length = MAX (max_length, len);
497 GOptionGroup *group = list->data;
499 /* First, we check the --help-<groupname> options */
500 len = g_utf8_strlen ("--help-", -1) + g_utf8_strlen (group->name, -1);
501 max_length = MAX (max_length, len);
503 /* Then we go through the entries */
504 len = calculate_max_length (group);
505 max_length = MAX (max_length, len);
510 /* Add a bit of padding */
515 list = context->groups;
517 g_print ("%s\n -%c, --%-*s %s\n",
518 _("Help Options:"), '?', max_length - 4, "help",
519 _("Show help options"));
521 /* We only want --help-all when there are groups */
523 g_print (" --%-*s %s\n", max_length, "help-all",
524 _("Show all help options"));
528 GOptionGroup *group = list->data;
530 g_print (" --help-%-*s %s\n", max_length - 5, group->name,
531 TRANSLATE (group, group->help_description));
541 /* Print a certain group */
543 g_print ("%s\n", TRANSLATE (group, group->description));
544 for (i = 0; i < group->n_entries; i++)
545 print_entry (group, max_length, &group->entries[i]);
550 /* Print all groups */
552 list = context->groups;
556 GOptionGroup *group = list->data;
558 g_print ("%s\n", group->description);
560 for (i = 0; i < group->n_entries; i++)
561 if (!(group->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
562 print_entry (group, max_length, &group->entries[i]);
569 /* Print application options if --help or --help-all has been specified */
570 if (main_help || !group)
572 list = context->groups;
574 g_print ("%s\n", _("Application Options:"));
576 if (context->main_group)
577 for (i = 0; i < context->main_group->n_entries; i++)
578 print_entry (context->main_group, max_length,
579 &context->main_group->entries[i]);
583 GOptionGroup *group = list->data;
585 /* Print main entries from other groups */
586 for (i = 0; i < group->n_entries; i++)
587 if (group->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
588 print_entry (group, max_length, &group->entries[i]);
600 parse_int (const gchar *arg_name,
606 glong tmp = strtol (arg, &end, 0);
610 if (*arg == '\0' || *end != '\0')
613 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
614 _("Cannot parse integer value '%s' for --%s"),
620 if (*result != tmp || errno == ERANGE)
623 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
624 _("Integer value '%s' for %s out of range"),
633 get_change (GOptionContext *context,
638 Change *change = NULL;
640 for (list = context->changes; list != NULL; list = list->next)
644 if (change->arg_data == arg_data)
648 change = g_new0 (Change, 1);
649 change->arg_type = arg_type;
650 change->arg_data = arg_data;
652 context->changes = g_list_prepend (context->changes, change);
660 add_pending_null (GOptionContext *context,
666 n = g_new0 (PendingNull, 1);
670 context->pending_nulls = g_list_prepend (context->pending_nulls, n);
674 parse_arg (GOptionContext *context,
678 const gchar *option_name,
686 case G_OPTION_ARG_NONE:
688 change = get_change (context, G_OPTION_ARG_NONE,
691 *(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
694 case G_OPTION_ARG_STRING:
698 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
703 change = get_change (context, G_OPTION_ARG_STRING,
705 g_free (change->allocated.str);
707 change->prev.str = *(gchar **)entry->arg_data;
708 change->allocated.str = data;
710 *(gchar **)entry->arg_data = data;
713 case G_OPTION_ARG_STRING_ARRAY:
717 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
722 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
725 if (change->allocated.array.len == 0)
727 change->prev.array = entry->arg_data;
728 change->allocated.array.data = g_new (gchar *, 2);
731 change->allocated.array.data =
732 g_renew (gchar *, change->allocated.array.data,
733 change->allocated.array.len + 2);
735 change->allocated.array.data[change->allocated.array.len] = data;
736 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
738 change->allocated.array.len ++;
740 *(gchar ***)entry->arg_data = change->allocated.array.data;
745 case G_OPTION_ARG_FILENAME:
750 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
755 data = g_strdup (value);
757 change = get_change (context, G_OPTION_ARG_FILENAME,
759 g_free (change->allocated.str);
761 change->prev.str = *(gchar **)entry->arg_data;
762 change->allocated.str = data;
764 *(gchar **)entry->arg_data = data;
768 case G_OPTION_ARG_FILENAME_ARRAY:
773 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
778 data = g_strdup (value);
780 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
783 if (change->allocated.array.len == 0)
785 change->prev.array = entry->arg_data;
786 change->allocated.array.data = g_new (gchar *, 2);
789 change->allocated.array.data =
790 g_renew (gchar *, change->allocated.array.data,
791 change->allocated.array.len + 2);
793 change->allocated.array.data[change->allocated.array.len] = data;
794 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
796 change->allocated.array.len ++;
798 *(gchar ***)entry->arg_data = change->allocated.array.data;
803 case G_OPTION_ARG_INT:
807 if (!parse_int (option_name, value,
812 change = get_change (context, G_OPTION_ARG_INT,
814 change->prev.integer = *(gint *)entry->arg_data;
815 *(gint *)entry->arg_data = data;
818 case G_OPTION_ARG_CALLBACK:
823 tmp = g_locale_to_utf8 (value, -1, NULL, NULL, error);
828 retval = (* (GOptionArgFunc) entry->arg_data) (option_name, tmp, group->user_data, error);
837 g_assert_not_reached ();
844 parse_short_option (GOptionContext *context,
856 for (j = 0; j < group->n_entries; j++)
858 if (arg == group->entries[j].short_name)
860 if (group->entries[j].arg == G_OPTION_ARG_NONE)
862 parse_arg (context, group, &group->entries[j],
871 if (*new_index > index)
873 g_warning ("FIXME: figure out the correct error here");
878 if (index < *argc - 1)
880 value = (*argv)[index + 1];
881 add_pending_null (context, &((*argv)[index + 1]), NULL);
882 *new_index = index + 1;
888 option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
890 if (!parse_arg (context, group, &group->entries[j], value, option_name, error))
892 g_free (option_name);
896 g_free (option_name);
906 parse_long_option (GOptionContext *context,
917 for (j = 0; j < group->n_entries; j++)
922 if (group->entries[j].arg == G_OPTION_ARG_NONE &&
923 strcmp (arg, group->entries[j].long_name) == 0)
925 parse_arg (context, group, &group->entries[j],
928 add_pending_null (context, &((*argv)[*index]), NULL);
933 gint len = strlen (group->entries[j].long_name);
935 if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
936 (arg[len] == '=' || arg[len] == 0))
941 add_pending_null (context, &((*argv)[*index]), NULL);
944 value = arg + len + 1;
945 else if (*index < *argc - 1)
947 value = (*argv)[*index + 1];
948 add_pending_null (context, &((*argv)[*index + 1]), NULL);
954 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
956 if (!parse_arg (context, group, &group->entries[j], value, option_name, error))
958 g_free (option_name);
962 g_free (option_name);
972 parse_remaining_arg (GOptionContext *context,
982 for (j = 0; j < group->n_entries; j++)
987 if (group->entries[j].long_name[0])
990 g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
991 group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
993 add_pending_null (context, &((*argv)[*index]), NULL);
995 if (!parse_arg (context, group, &group->entries[j], (*argv)[*index], "", error))
1006 free_changes_list (GOptionContext *context,
1011 for (list = context->changes; list != NULL; list = list->next)
1013 Change *change = list->data;
1017 switch (change->arg_type)
1019 case G_OPTION_ARG_NONE:
1020 *(gboolean *)change->arg_data = change->prev.bool;
1022 case G_OPTION_ARG_INT:
1023 *(gint *)change->arg_data = change->prev.integer;
1025 case G_OPTION_ARG_STRING:
1026 case G_OPTION_ARG_FILENAME:
1027 g_free (change->allocated.str);
1028 *(gchar **)change->arg_data = change->prev.str;
1030 case G_OPTION_ARG_STRING_ARRAY:
1031 case G_OPTION_ARG_FILENAME_ARRAY:
1032 g_strfreev (change->allocated.array.data);
1033 *(gchar ***)change->arg_data = change->prev.array;
1036 g_assert_not_reached ();
1043 g_list_free (context->changes);
1044 context->changes = NULL;
1048 free_pending_nulls (GOptionContext *context,
1049 gboolean perform_nulls)
1053 for (list = context->pending_nulls; list != NULL; list = list->next)
1055 PendingNull *n = list->data;
1061 /* Copy back the short options */
1063 strcpy (*n->ptr + 1, n->value);
1073 g_list_free (context->pending_nulls);
1074 context->pending_nulls = NULL;
1078 * g_option_context_parse:
1079 * @context: a #GOptionContext
1080 * @argc: a pointer to the number of command line arguments.
1081 * @argv: a pointer to the array of command line arguments.
1082 * @error: a return location for errors
1084 * Parses the command line arguments, recognizing options
1085 * which have been added to @context. A side-effect of
1086 * calling this function is that g_set_prgname() will be
1089 * If the parsing is successful, any parsed arguments are
1090 * removed from the array and @argc and @argv are updated
1091 * accordingly. A '--' option is stripped from @argv
1092 * unless there are unparsed options before and after it,
1093 * or some of the options after it start with '-'. In case
1094 * of an error, @argc and @argv are left unmodified.
1096 * If automatic <option>--help</option> support is enabled
1097 * (see g_option_context_set_help_enabled()), and the
1098 * @argv array contains one of the recognized help options,
1099 * this function will produce help output to stdout and
1100 * call <literal>exit (0)</literal>.
1102 * Return value: %TRUE if the parsing was successful,
1103 * %FALSE if an error occurred
1108 g_option_context_parse (GOptionContext *context,
1116 /* Set program name */
1117 if (argc && argv && *argc)
1121 prgname = g_path_get_basename ((*argv)[0]);
1122 g_set_prgname (prgname);
1127 g_set_prgname ("<unknown>");
1130 /* Call pre-parse hooks */
1131 list = context->groups;
1134 GOptionGroup *group = list->data;
1136 if (group->pre_parse_func)
1138 if (!(* group->pre_parse_func) (context, group,
1139 group->user_data, error))
1146 if (context->main_group && context->main_group->pre_parse_func)
1148 if (!(* context->main_group->pre_parse_func) (context, context->main_group,
1149 context->main_group->user_data, error))
1155 gboolean stop_parsing = FALSE;
1156 gboolean has_unknown = FALSE;
1157 gint separator_pos = 0;
1159 for (i = 1; i < *argc; i++)
1162 gboolean parsed = FALSE;
1164 if ((*argv)[i][0] == '-' && !stop_parsing)
1166 if ((*argv)[i][1] == '-')
1170 arg = (*argv)[i] + 2;
1172 /* '--' terminates list of arguments */
1176 stop_parsing = TRUE;
1180 /* Handle help options */
1181 if (context->help_enabled)
1183 if (strcmp (arg, "help") == 0)
1184 print_help (context, TRUE, NULL);
1185 else if (strcmp (arg, "help-all") == 0)
1186 print_help (context, FALSE, NULL);
1187 else if (strncmp (arg, "help-", 5) == 0)
1191 list = context->groups;
1195 GOptionGroup *group = list->data;
1197 if (strcmp (arg + 5, group->name) == 0)
1198 print_help (context, FALSE, group);
1205 if (context->main_group &&
1206 !parse_long_option (context, context->main_group, &i, arg,
1207 argc, argv, error, &parsed))
1213 /* Try the groups */
1214 list = context->groups;
1217 GOptionGroup *group = list->data;
1219 if (!parse_long_option (context, group, &i, arg,
1220 argc, argv, error, &parsed))
1232 /* Now look for --<group>-<option> */
1233 dash = strchr (arg, '-');
1236 /* Try the groups */
1237 list = context->groups;
1240 GOptionGroup *group = list->data;
1242 if (strncmp (group->name, arg, dash - arg) == 0)
1244 if (!parse_long_option (context, group, &i, dash + 1,
1245 argc, argv, error, &parsed))
1256 if (context->ignore_unknown)
1264 gboolean *nulled_out = NULL;
1266 arg = (*argv)[i] + 1;
1270 if (context->ignore_unknown)
1271 nulled_out = g_new0 (gboolean, strlen (arg));
1273 for (j = 0; j < strlen (arg); j++)
1275 if (context->help_enabled && arg[j] == '?')
1276 print_help (context, TRUE, NULL);
1280 if (context->main_group &&
1281 !parse_short_option (context, context->main_group,
1283 argc, argv, error, &parsed))
1286 g_free (nulled_out);
1292 /* Try the groups */
1293 list = context->groups;
1296 GOptionGroup *group = list->data;
1298 if (!parse_short_option (context, group, i, &new_i, arg[j],
1299 argc, argv, error, &parsed))
1309 if (context->ignore_unknown)
1312 nulled_out[j] = TRUE;
1321 if (context->ignore_unknown)
1323 gchar *new_arg = NULL;
1326 for (j = 0; j < strlen (arg); j++)
1331 new_arg = g_malloc (strlen (arg) + 1);
1332 new_arg[arg_index++] = arg[j];
1336 new_arg[arg_index] = '\0';
1338 add_pending_null (context, &((*argv)[i]), new_arg);
1342 add_pending_null (context, &((*argv)[i]), NULL);
1350 if (!parsed && !context->ignore_unknown)
1353 G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1354 _("Unknown option %s"), (*argv)[i]);
1360 /* Collect remaining args */
1361 if (context->main_group &&
1362 !parse_remaining_arg (context, context->main_group, &i,
1363 argc, argv, error, &parsed))
1366 if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
1371 if (separator_pos > 0)
1372 add_pending_null (context, &((*argv)[separator_pos]), NULL);
1376 /* Call post-parse hooks */
1377 list = context->groups;
1380 GOptionGroup *group = list->data;
1382 if (group->post_parse_func)
1384 if (!(* group->post_parse_func) (context, group,
1385 group->user_data, error))
1392 if (context->main_group && context->main_group->post_parse_func)
1394 if (!(* context->main_group->post_parse_func) (context, context->main_group,
1395 context->main_group->user_data, error))
1401 free_pending_nulls (context, TRUE);
1403 for (i = 1; i < *argc; i++)
1405 for (k = i; k < *argc; k++)
1406 if ((*argv)[k] != NULL)
1412 for (j = i + k; j < *argc; j++)
1414 (*argv)[j-k] = (*argv)[j];
1426 /* Call error hooks */
1427 list = context->groups;
1430 GOptionGroup *group = list->data;
1432 if (group->error_func)
1433 (* group->error_func) (context, group,
1434 group->user_data, error);
1439 if (context->main_group && context->main_group->error_func)
1440 (* context->main_group->error_func) (context, context->main_group,
1441 context->main_group->user_data, error);
1443 free_changes_list (context, TRUE);
1444 free_pending_nulls (context, FALSE);
1450 * g_option_group_new:
1451 * @name: the name for the option group, this is used to provide
1452 * help for the options in this group with <option>--help-</option>@name
1453 * @description: a description for this group to be shown in
1454 * <option>--help</option>. This string is translated using the translation
1455 * domain or translation function of the group
1456 * @help_description: a description for the <option>--help-</option>@name option.
1457 * This string is translated using the translation domain or translation function
1459 * @user_data: user data that will be passed to the pre- and post-parse hooks,
1460 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
1461 * @destroy: a function that will be called to free @user_data, or %NULL
1463 * Creates a new #GOptionGroup.
1465 * Return value: a newly created option group. It should be added
1466 * to a #GOptionContext or freed with g_option_group_free().
1471 g_option_group_new (const gchar *name,
1472 const gchar *description,
1473 const gchar *help_description,
1475 GDestroyNotify destroy)
1478 GOptionGroup *group;
1480 group = g_new0 (GOptionGroup, 1);
1481 group->name = g_strdup (name);
1482 group->description = g_strdup (description);
1483 group->help_description = g_strdup (help_description);
1484 group->user_data = user_data;
1485 group->destroy_notify = destroy;
1492 * g_option_group_free:
1493 * @group: a #GOptionGroup
1495 * Frees a #GOptionGroup. Note that you must <emphasis>not</emphasis>
1496 * free groups which have been added to a #GOptionContext.
1501 g_option_group_free (GOptionGroup *group)
1503 g_return_if_fail (group != NULL);
1505 g_free (group->name);
1506 g_free (group->description);
1507 g_free (group->help_description);
1509 g_free (group->entries);
1511 if (group->destroy_notify)
1512 (* group->destroy_notify) (group->user_data);
1514 if (group->translate_notify)
1515 (* group->translate_notify) (group->translate_data);
1522 * g_option_group_add_entries:
1523 * @group: a #GOptionGroup
1524 * @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
1526 * Adds the options specified in @entries to @group.
1531 g_option_group_add_entries (GOptionGroup *group,
1532 const GOptionEntry *entries)
1536 g_return_if_fail (entries != NULL);
1538 for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++);
1540 group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
1542 memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
1544 group->n_entries += n_entries;
1548 * g_option_group_set_parse_hooks:
1549 * @group: a #GOptionGroup
1550 * @pre_parse_func: a function to call before parsing, or %NULL
1551 * @post_parse_func: a function to call after parsing, or %NULL
1553 * Associates two functions with @group which will be called
1554 * from g_option_context_parse() before the first option is parsed
1555 * and after the last option has been parsed, respectively.
1557 * Note that the user data to be passed to @pre_parse_func and
1558 * @post_parse_func can be specified when constructing the group
1559 * with g_option_group_new().
1564 g_option_group_set_parse_hooks (GOptionGroup *group,
1565 GOptionParseFunc pre_parse_func,
1566 GOptionParseFunc post_parse_func)
1568 g_return_if_fail (group != NULL);
1570 group->pre_parse_func = pre_parse_func;
1571 group->post_parse_func = post_parse_func;
1575 * g_option_group_set_error_hook:
1576 * @group: a #GOptionGroup
1577 * @error_func: a function to call when an error occurs
1579 * Associates a function with @group which will be called
1580 * from g_option_context_parse() when an error occurs.
1582 * Note that the user data to be passed to @pre_parse_func and
1583 * @post_parse_func can be specified when constructing the group
1584 * with g_option_group_new().
1589 g_option_group_set_error_hook (GOptionGroup *group,
1590 GOptionErrorFunc error_func)
1592 g_return_if_fail (group != NULL);
1594 group->error_func = error_func;
1599 * g_option_group_set_translate_func:
1600 * @group: a #GOptionGroup
1601 * @func: the #GTranslateFunc, or %NULL
1602 * @data: user data to pass to @func, or %NULL
1603 * @destroy_notify: a function which gets called to free @data, or %NULL
1605 * Sets the function which is used to translate user-visible
1606 * strings, for <option>--help</option> output. Different
1607 * groups can use different #GTranslateFunc<!-- -->s. If @func
1608 * is %NULL, strings are not translated.
1610 * If you are using gettext(), you only need to set the translation
1611 * domain, see g_option_group_set_translation_domain().
1616 g_option_group_set_translate_func (GOptionGroup *group,
1617 GTranslateFunc func,
1619 GDestroyNotify destroy_notify)
1621 g_return_if_fail (group != NULL);
1623 if (group->translate_notify)
1624 group->translate_notify (group->translate_data);
1626 group->translate_func = func;
1627 group->translate_data = data;
1628 group->translate_notify = destroy_notify;
1632 dgettext_swapped (const gchar *msgid,
1633 const gchar *domainname)
1635 return dgettext (domainname, msgid);
1639 * g_option_group_set_translation_domain:
1640 * @group: a #GOptionGroup
1641 * @domain: the domain to use
1643 * A convenience function to use gettext() for translating
1644 * user-visible strings.
1649 g_option_group_set_translation_domain (GOptionGroup *group,
1650 const gchar *domain)
1652 g_return_if_fail (group != NULL);
1654 g_option_group_set_translate_func (group,
1655 (GTranslateFunc)dgettext_swapped,