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, see <http://www.gnu.org/licenses/>.
22 * @Short_description: parses commandline options
23 * @Title: Commandline option parser
25 * The GOption commandline parser is intended to be a simpler replacement
26 * for the popt library. It supports short and long commandline options,
27 * as shown in the following example:
29 * `testtreemodel -r 1 --max-size 20 --rand --display=:1.0 -vb -- file1 file2`
31 * The example demonstrates a number of features of the GOption
34 * - Options can be single letters, prefixed by a single dash.
36 * - Multiple short options can be grouped behind a single dash.
38 * - Long options are prefixed by two consecutive dashes.
40 * - Options can have an extra argument, which can be a number, a string or
41 * a filename. For long options, the extra argument can be appended with
42 * an equals sign after the option name, which is useful if the extra
43 * argument starts with a dash, which would otherwise cause it to be
44 * interpreted as another option.
46 * - Non-option arguments are returned to the application as rest arguments.
48 * - An argument consisting solely of two dashes turns off further parsing,
49 * any remaining arguments (even those starting with a dash) are returned
50 * to the application as rest arguments.
52 * Another important feature of GOption is that it can automatically
53 * generate nicely formatted help output. Unless it is explicitly turned
54 * off with g_option_context_set_help_enabled(), GOption will recognize
55 * the `--help`, `-?`, `--help-all` and `--help-groupname` options
56 * (where `groupname` is the name of a #GOptionGroup) and write a text
57 * similar to the one shown in the following example to stdout.
61 * testtreemodel [OPTION...] - test tree model performance
64 * -h, --help Show help options
65 * --help-all Show all help options
66 * --help-gtk Show GTK+ Options
68 * Application Options:
69 * -r, --repeats=N Average over N repetitions
70 * -m, --max-size=M Test up to 2^M items
71 * --display=DISPLAY X display to use
72 * -v, --verbose Be verbose
73 * -b, --beep Beep when done
74 * --rand Randomize the data
77 * GOption groups options in #GOptionGroups, which makes it easy to
78 * incorporate options from multiple sources. The intended use for this is
79 * to let applications collect option groups from the libraries it uses,
80 * add them to their #GOptionContext, and parse all options by a single call
81 * to g_option_context_parse(). See gtk_get_option_group() for an example.
83 * If an option is declared to be of type string or filename, GOption takes
84 * care of converting it to the right encoding; strings are returned in
85 * UTF-8, filenames are returned in the GLib filename encoding. Note that
86 * this only works if setlocale() has been called before
87 * g_option_context_parse().
89 * Here is a complete example of setting up GOption to parse the example
90 * commandline above and produce the example help output.
91 * |[<!-- language="C" -->
92 * static gint repeats = 2;
93 * static gint max_size = 8;
94 * static gboolean verbose = FALSE;
95 * static gboolean beep = FALSE;
96 * static gboolean randomize = FALSE;
98 * static GOptionEntry entries[] =
100 * { "repeats", 'r', 0, G_OPTION_ARG_INT, &repeats, "Average over N repetitions", "N" },
101 * { "max-size", 'm', 0, G_OPTION_ARG_INT, &max_size, "Test up to 2^M items", "M" },
102 * { "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, "Be verbose", NULL },
103 * { "beep", 'b', 0, G_OPTION_ARG_NONE, &beep, "Beep when done", NULL },
104 * { "rand", 0, 0, G_OPTION_ARG_NONE, &randomize, "Randomize the data", NULL },
109 * main (int argc, char *argv[])
111 * GError *error = NULL;
112 * GOptionContext *context;
114 * context = g_option_context_new ("- test tree model performance");
115 * g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
116 * g_option_context_add_group (context, gtk_get_option_group (TRUE));
117 * if (!g_option_context_parse (context, &argc, &argv, &error))
119 * g_print ("option parsing failed: %s\n", error->message);
128 * On UNIX systems, the argv that is passed to main() has no particular
129 * encoding, even to the extent that different parts of it may have
130 * different encodings. In general, normal arguments and flags will be
131 * in the current locale and filenames should be considered to be opaque
132 * byte strings. Proper use of %G_OPTION_ARG_FILENAME vs
133 * %G_OPTION_ARG_STRING is therefore important.
135 * Note that on Windows, filenames do have an encoding, but using
136 * #GOptionContext with the argv as passed to main() will result in a
137 * program that can only accept commandline arguments with characters
138 * from the system codepage. This can cause problems when attempting to
139 * deal with filenames containing Unicode characters that fall outside
142 * A solution to this is to use g_win32_get_command_line() and
143 * g_option_context_parse_strv() which will properly handle full Unicode
144 * filenames. If you are using #GApplication, this is done
145 * automatically for you.
147 * The following example shows how you can use #GOptionContext directly
148 * in order to correctly deal with Unicode filenames on Windows:
150 * |[<!-- language="C" -->
152 * main (int argc, char **argv)
154 * GError *error = NULL;
155 * GOptionContext *context;
159 * args = g_win32_get_command_line ();
161 * args = g_strdupv (argv);
166 * if (!g_option_context_parse_strv (context, &args, &error))
187 #if defined __OpenBSD__
188 #include <sys/types.h>
190 #include <sys/param.h>
191 #include <sys/sysctl.h>
197 #include "glibintl.h"
199 #define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
201 #define NO_ARG(entry) ((entry)->arg == G_OPTION_ARG_NONE || \
202 ((entry)->arg == G_OPTION_ARG_CALLBACK && \
203 ((entry)->flags & G_OPTION_FLAG_NO_ARG)))
205 #define OPTIONAL_ARG(entry) ((entry)->arg == G_OPTION_ARG_CALLBACK && \
206 (entry)->flags & G_OPTION_FLAG_OPTIONAL_ARG)
238 struct _GOptionContext
242 gchar *parameter_string;
246 GTranslateFunc translate_func;
247 GDestroyNotify translate_notify;
248 gpointer translate_data;
250 guint help_enabled : 1;
251 guint ignore_unknown : 1;
254 GOptionGroup *main_group;
256 /* We keep a list of change so we can revert them */
259 /* We also keep track of all argv elements
260 * that should be NULLed or modified.
262 GList *pending_nulls;
269 gchar *help_description;
271 GDestroyNotify destroy_notify;
274 GTranslateFunc translate_func;
275 GDestroyNotify translate_notify;
276 gpointer translate_data;
278 GOptionEntry *entries;
281 GOptionParseFunc pre_parse_func;
282 GOptionParseFunc post_parse_func;
283 GOptionErrorFunc error_func;
286 static void free_changes_list (GOptionContext *context,
288 static void free_pending_nulls (GOptionContext *context,
289 gboolean perform_nulls);
293 _g_unichar_get_width (gunichar c)
295 if (G_UNLIKELY (g_unichar_iszerowidth (c)))
298 /* we ignore the fact that we should call g_unichar_iswide_cjk() under
299 * some locales (legacy East Asian ones) */
300 if (g_unichar_iswide (c))
307 _g_utf8_strwidth (const gchar *p)
310 g_return_val_if_fail (p != NULL, 0);
314 len += _g_unichar_get_width (g_utf8_get_char (p));
315 p = g_utf8_next_char (p);
321 G_DEFINE_QUARK (g-option-context-error-quark, g_option_error)
324 * g_option_context_new:
325 * @parameter_string: (allow-none): a string which is displayed in
326 * the first line of `--help` output, after the usage summary
327 * `programname [OPTION...]`
329 * Creates a new option context.
331 * The @parameter_string can serve multiple purposes. It can be used
332 * to add descriptions for "rest" arguments, which are not parsed by
333 * the #GOptionContext, typically something like "FILES" or
334 * "FILE1 FILE2...". If you are using #G_OPTION_REMAINING for
335 * collecting "rest" arguments, GLib handles this automatically by
336 * using the @arg_description of the corresponding #GOptionEntry in
339 * Another usage is to give a short summary of the program
340 * functionality, like " - frob the strings", which will be displayed
341 * in the same line as the usage. For a longer description of the
342 * program functionality that should be displayed as a paragraph
343 * below the usage line, use g_option_context_set_summary().
345 * Note that the @parameter_string is translated using the
346 * function set with g_option_context_set_translate_func(), so
347 * it should normally be passed untranslated.
349 * Returns: a newly created #GOptionContext, which must be
350 * freed with g_option_context_free() after use.
355 g_option_context_new (const gchar *parameter_string)
358 GOptionContext *context;
360 context = g_new0 (GOptionContext, 1);
362 context->parameter_string = g_strdup (parameter_string);
363 context->help_enabled = TRUE;
364 context->ignore_unknown = FALSE;
370 * g_option_context_free:
371 * @context: a #GOptionContext
373 * Frees context and all the groups which have been
376 * Please note that parsed arguments need to be freed separately (see
381 void g_option_context_free (GOptionContext *context)
383 g_return_if_fail (context != NULL);
385 g_list_free_full (context->groups, (GDestroyNotify) g_option_group_free);
387 if (context->main_group)
388 g_option_group_free (context->main_group);
390 free_changes_list (context, FALSE);
391 free_pending_nulls (context, FALSE);
393 g_free (context->parameter_string);
394 g_free (context->summary);
395 g_free (context->description);
397 if (context->translate_notify)
398 (* context->translate_notify) (context->translate_data);
405 * g_option_context_set_help_enabled:
406 * @context: a #GOptionContext
407 * @help_enabled: %TRUE to enable `--help`, %FALSE to disable it
409 * Enables or disables automatic generation of `--help` output.
410 * By default, g_option_context_parse() recognizes `--help`, `-h`,
411 * `-?`, `--help-all` and `--help-groupname` and creates suitable
416 void g_option_context_set_help_enabled (GOptionContext *context,
417 gboolean help_enabled)
420 g_return_if_fail (context != NULL);
422 context->help_enabled = help_enabled;
426 * g_option_context_get_help_enabled:
427 * @context: a #GOptionContext
429 * Returns whether automatic `--help` generation
430 * is turned on for @context. See g_option_context_set_help_enabled().
432 * Returns: %TRUE if automatic help generation is turned on.
437 g_option_context_get_help_enabled (GOptionContext *context)
439 g_return_val_if_fail (context != NULL, FALSE);
441 return context->help_enabled;
445 * g_option_context_set_ignore_unknown_options:
446 * @context: a #GOptionContext
447 * @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
448 * an error when unknown options are met
450 * Sets whether to ignore unknown options or not. If an argument is
451 * ignored, it is left in the @argv array after parsing. By default,
452 * g_option_context_parse() treats unknown options as error.
454 * This setting does not affect non-option arguments (i.e. arguments
455 * which don't start with a dash). But note that GOption cannot reliably
456 * determine whether a non-option belongs to a preceding unknown option.
461 g_option_context_set_ignore_unknown_options (GOptionContext *context,
462 gboolean ignore_unknown)
464 g_return_if_fail (context != NULL);
466 context->ignore_unknown = ignore_unknown;
470 * g_option_context_get_ignore_unknown_options:
471 * @context: a #GOptionContext
473 * Returns whether unknown options are ignored or not. See
474 * g_option_context_set_ignore_unknown_options().
476 * Returns: %TRUE if unknown options are ignored.
481 g_option_context_get_ignore_unknown_options (GOptionContext *context)
483 g_return_val_if_fail (context != NULL, FALSE);
485 return context->ignore_unknown;
489 * g_option_context_add_group:
490 * @context: a #GOptionContext
491 * @group: the group to add
493 * Adds a #GOptionGroup to the @context, so that parsing with @context
494 * will recognize the options in the group. Note that the group will
495 * be freed together with the context when g_option_context_free() is
496 * called, so you must not free the group yourself after adding it
502 g_option_context_add_group (GOptionContext *context,
507 g_return_if_fail (context != NULL);
508 g_return_if_fail (group != NULL);
509 g_return_if_fail (group->name != NULL);
510 g_return_if_fail (group->description != NULL);
511 g_return_if_fail (group->help_description != NULL);
513 for (list = context->groups; list; list = list->next)
515 GOptionGroup *g = (GOptionGroup *)list->data;
517 if ((group->name == NULL && g->name == NULL) ||
518 (group->name && g->name && strcmp (group->name, g->name) == 0))
519 g_warning ("A group named \"%s\" is already part of this GOptionContext",
523 context->groups = g_list_append (context->groups, group);
527 * g_option_context_set_main_group:
528 * @context: a #GOptionContext
529 * @group: the group to set as main group
531 * Sets a #GOptionGroup as main group of the @context.
532 * This has the same effect as calling g_option_context_add_group(),
533 * the only difference is that the options in the main group are
534 * treated differently when generating `--help` output.
539 g_option_context_set_main_group (GOptionContext *context,
542 g_return_if_fail (context != NULL);
543 g_return_if_fail (group != NULL);
545 if (context->main_group)
547 g_warning ("This GOptionContext already has a main group");
552 context->main_group = group;
556 * g_option_context_get_main_group:
557 * @context: a #GOptionContext
559 * Returns a pointer to the main group of @context.
561 * Returns: the main group of @context, or %NULL if @context doesn't
562 * have a main group. Note that group belongs to @context and should
563 * not be modified or freed.
568 g_option_context_get_main_group (GOptionContext *context)
570 g_return_val_if_fail (context != NULL, NULL);
572 return context->main_group;
576 * g_option_context_add_main_entries:
577 * @context: a #GOptionContext
578 * @entries: a %NULL-terminated array of #GOptionEntrys
579 * @translation_domain: (allow-none): a translation domain to use for translating
580 * the `--help` output for the options in @entries
581 * with gettext(), or %NULL
583 * A convenience function which creates a main group if it doesn't
584 * exist, adds the @entries to it and sets the translation domain.
589 g_option_context_add_main_entries (GOptionContext *context,
590 const GOptionEntry *entries,
591 const gchar *translation_domain)
593 g_return_if_fail (entries != NULL);
595 if (!context->main_group)
596 context->main_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
598 g_option_group_add_entries (context->main_group, entries);
599 g_option_group_set_translation_domain (context->main_group, translation_domain);
603 calculate_max_length (GOptionGroup *group,
607 gint i, len, max_length;
608 const gchar *long_name;
612 for (i = 0; i < group->n_entries; i++)
614 entry = &group->entries[i];
616 if (entry->flags & G_OPTION_FLAG_HIDDEN)
619 long_name = g_hash_table_lookup (aliases, &entry->long_name);
621 long_name = entry->long_name;
622 len = _g_utf8_strwidth (long_name);
624 if (entry->short_name)
627 if (!NO_ARG (entry) && entry->arg_description)
628 len += 1 + _g_utf8_strwidth (TRANSLATE (group, entry->arg_description));
630 max_length = MAX (max_length, len);
637 print_entry (GOptionGroup *group,
639 const GOptionEntry *entry,
644 const gchar *long_name;
646 if (entry->flags & G_OPTION_FLAG_HIDDEN)
649 if (entry->long_name[0] == 0)
652 long_name = g_hash_table_lookup (aliases, &entry->long_name);
654 long_name = entry->long_name;
656 str = g_string_new (NULL);
658 if (entry->short_name)
659 g_string_append_printf (str, " -%c, --%s", entry->short_name, long_name);
661 g_string_append_printf (str, " --%s", long_name);
663 if (entry->arg_description)
664 g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
666 g_string_append_printf (string, "%s%*s %s\n", str->str,
667 (int) (max_length + 4 - _g_utf8_strwidth (str->str)), "",
668 entry->description ? TRANSLATE (group, entry->description) : "");
669 g_string_free (str, TRUE);
673 group_has_visible_entries (GOptionContext *context,
675 gboolean main_entries)
677 GOptionFlags reject_filter = G_OPTION_FLAG_HIDDEN;
680 gboolean main_group = group == context->main_group;
683 reject_filter |= G_OPTION_FLAG_IN_MAIN;
685 for (i = 0, l = (group ? group->n_entries : 0); i < l; i++)
687 entry = &group->entries[i];
689 if (main_entries && !main_group && !(entry->flags & G_OPTION_FLAG_IN_MAIN))
691 if (entry->long_name[0] == 0) /* ignore rest entry */
693 if (!(entry->flags & reject_filter))
701 group_list_has_visible_entries (GOptionContext *context,
703 gboolean main_entries)
707 if (group_has_visible_entries (context, group_list->data, main_entries))
710 group_list = group_list->next;
717 context_has_h_entry (GOptionContext *context)
722 if (context->main_group)
724 for (i = 0; i < context->main_group->n_entries; i++)
726 if (context->main_group->entries[i].short_name == 'h')
731 for (list = context->groups; list != NULL; list = g_list_next (list))
735 group = (GOptionGroup*)list->data;
736 for (i = 0; i < group->n_entries; i++)
738 if (group->entries[i].short_name == 'h')
746 * g_option_context_get_help:
747 * @context: a #GOptionContext
748 * @main_help: if %TRUE, only include the main group
749 * @group: (allow-none): the #GOptionGroup to create help for, or %NULL
751 * Returns a formatted, translated help text for the given context.
752 * To obtain the text produced by `--help`, call
753 * `g_option_context_get_help (context, TRUE, NULL)`.
754 * To obtain the text produced by `--help-all`, call
755 * `g_option_context_get_help (context, FALSE, NULL)`.
756 * To obtain the help text for an option group, call
757 * `g_option_context_get_help (context, FALSE, group)`.
759 * Returns: A newly allocated string containing the help text
764 g_option_context_get_help (GOptionContext *context,
769 gint max_length = 0, len;
772 GHashTable *shadow_map;
775 const gchar *rest_description;
779 string = g_string_sized_new (1024);
781 rest_description = NULL;
782 if (context->main_group)
785 for (i = 0; i < context->main_group->n_entries; i++)
787 entry = &context->main_group->entries[i];
788 if (entry->long_name[0] == 0)
790 rest_description = TRANSLATE (context->main_group, entry->arg_description);
796 g_string_append_printf (string, "%s\n %s %s",
797 _("Usage:"), g_get_prgname(), _("[OPTION...]"));
799 if (rest_description)
801 g_string_append (string, " ");
802 g_string_append (string, rest_description);
805 if (context->parameter_string)
807 g_string_append (string, " ");
808 g_string_append (string, TRANSLATE (context, context->parameter_string));
811 g_string_append (string, "\n\n");
813 if (context->summary)
815 g_string_append (string, TRANSLATE (context, context->summary));
816 g_string_append (string, "\n\n");
819 memset (seen, 0, sizeof (gboolean) * 256);
820 shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
821 aliases = g_hash_table_new_full (NULL, NULL, NULL, g_free);
823 if (context->main_group)
825 for (i = 0; i < context->main_group->n_entries; i++)
827 entry = &context->main_group->entries[i];
828 g_hash_table_insert (shadow_map,
829 (gpointer)entry->long_name,
832 if (seen[(guchar)entry->short_name])
833 entry->short_name = 0;
835 seen[(guchar)entry->short_name] = TRUE;
839 list = context->groups;
842 GOptionGroup *g = list->data;
843 for (i = 0; i < g->n_entries; i++)
845 entry = &g->entries[i];
846 if (g_hash_table_lookup (shadow_map, entry->long_name) &&
847 !(entry->flags & G_OPTION_FLAG_NOALIAS))
849 g_hash_table_insert (aliases, &entry->long_name,
850 g_strdup_printf ("%s-%s", g->name, entry->long_name));
853 g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
855 if (seen[(guchar)entry->short_name] &&
856 !(entry->flags & G_OPTION_FLAG_NOALIAS))
857 entry->short_name = 0;
859 seen[(guchar)entry->short_name] = TRUE;
864 g_hash_table_destroy (shadow_map);
866 list = context->groups;
868 if (context->help_enabled)
870 max_length = _g_utf8_strwidth ("-?, --help");
874 len = _g_utf8_strwidth ("--help-all");
875 max_length = MAX (max_length, len);
879 if (context->main_group)
881 len = calculate_max_length (context->main_group, aliases);
882 max_length = MAX (max_length, len);
887 GOptionGroup *g = list->data;
889 if (context->help_enabled)
891 /* First, we check the --help-<groupname> options */
892 len = _g_utf8_strwidth ("--help-") + _g_utf8_strwidth (g->name);
893 max_length = MAX (max_length, len);
896 /* Then we go through the entries */
897 len = calculate_max_length (g, aliases);
898 max_length = MAX (max_length, len);
903 /* Add a bit of padding */
906 if (!group && context->help_enabled)
908 list = context->groups;
910 token = context_has_h_entry (context) ? '?' : 'h';
912 g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
913 _("Help Options:"), token, max_length - 4, "help",
914 _("Show help options"));
916 /* We only want --help-all when there are groups */
918 g_string_append_printf (string, " --%-*s %s\n",
919 max_length, "help-all",
920 _("Show all help options"));
924 GOptionGroup *g = list->data;
926 if (group_has_visible_entries (context, g, FALSE))
927 g_string_append_printf (string, " --help-%-*s %s\n",
928 max_length - 5, g->name,
929 TRANSLATE (g, g->help_description));
934 g_string_append (string, "\n");
939 /* Print a certain group */
941 if (group_has_visible_entries (context, group, FALSE))
943 g_string_append (string, TRANSLATE (group, group->description));
944 g_string_append (string, "\n");
945 for (i = 0; i < group->n_entries; i++)
946 print_entry (group, max_length, &group->entries[i], string, aliases);
947 g_string_append (string, "\n");
952 /* Print all groups */
954 list = context->groups;
958 GOptionGroup *g = list->data;
960 if (group_has_visible_entries (context, g, FALSE))
962 g_string_append (string, g->description);
963 g_string_append (string, "\n");
964 for (i = 0; i < g->n_entries; i++)
965 if (!(g->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
966 print_entry (g, max_length, &g->entries[i], string, aliases);
968 g_string_append (string, "\n");
975 /* Print application options if --help or --help-all has been specified */
976 if ((main_help || !group) &&
977 (group_has_visible_entries (context, context->main_group, TRUE) ||
978 group_list_has_visible_entries (context, context->groups, TRUE)))
980 list = context->groups;
982 g_string_append (string, _("Application Options:"));
983 g_string_append (string, "\n");
984 if (context->main_group)
985 for (i = 0; i < context->main_group->n_entries; i++)
986 print_entry (context->main_group, max_length,
987 &context->main_group->entries[i], string, aliases);
991 GOptionGroup *g = list->data;
993 /* Print main entries from other groups */
994 for (i = 0; i < g->n_entries; i++)
995 if (g->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
996 print_entry (g, max_length, &g->entries[i], string, aliases);
1001 g_string_append (string, "\n");
1004 if (context->description)
1006 g_string_append (string, TRANSLATE (context, context->description));
1007 g_string_append (string, "\n");
1010 g_hash_table_destroy (aliases);
1012 return g_string_free (string, FALSE);
1017 print_help (GOptionContext *context,
1019 GOptionGroup *group)
1023 help = g_option_context_get_help (context, main_help, group);
1024 g_print ("%s", help);
1031 parse_int (const gchar *arg_name,
1040 tmp = strtol (arg, &end, 0);
1042 if (*arg == '\0' || *end != '\0')
1045 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1046 _("Cannot parse integer value '%s' for %s"),
1052 if (*result != tmp || errno == ERANGE)
1055 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1056 _("Integer value '%s' for %s out of range"),
1066 parse_double (const gchar *arg_name,
1075 tmp = g_strtod (arg, &end);
1077 if (*arg == '\0' || *end != '\0')
1080 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1081 _("Cannot parse double value '%s' for %s"),
1085 if (errno == ERANGE)
1088 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1089 _("Double value '%s' for %s out of range"),
1101 parse_int64 (const gchar *arg_name,
1110 tmp = g_ascii_strtoll (arg, &end, 0);
1112 if (*arg == '\0' || *end != '\0')
1115 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1116 _("Cannot parse integer value '%s' for %s"),
1120 if (errno == ERANGE)
1123 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1124 _("Integer value '%s' for %s out of range"),
1136 get_change (GOptionContext *context,
1137 GOptionArg arg_type,
1141 Change *change = NULL;
1143 for (list = context->changes; list != NULL; list = list->next)
1145 change = list->data;
1147 if (change->arg_data == arg_data)
1151 change = g_new0 (Change, 1);
1152 change->arg_type = arg_type;
1153 change->arg_data = arg_data;
1155 context->changes = g_list_prepend (context->changes, change);
1163 add_pending_null (GOptionContext *context,
1169 n = g_new0 (PendingNull, 1);
1173 context->pending_nulls = g_list_prepend (context->pending_nulls, n);
1177 parse_arg (GOptionContext *context,
1178 GOptionGroup *group,
1179 GOptionEntry *entry,
1181 const gchar *option_name,
1187 g_assert (value || OPTIONAL_ARG (entry) || NO_ARG (entry));
1191 case G_OPTION_ARG_NONE:
1193 change = get_change (context, G_OPTION_ARG_NONE,
1196 *(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
1199 case G_OPTION_ARG_STRING:
1204 if (!context->strv_mode)
1205 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1207 data = g_strdup (value);
1209 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1215 change = get_change (context, G_OPTION_ARG_STRING,
1217 g_free (change->allocated.str);
1219 change->prev.str = *(gchar **)entry->arg_data;
1220 change->allocated.str = data;
1222 *(gchar **)entry->arg_data = data;
1225 case G_OPTION_ARG_STRING_ARRAY:
1230 if (!context->strv_mode)
1231 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1233 data = g_strdup (value);
1235 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1241 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1244 if (change->allocated.array.len == 0)
1246 change->prev.array = *(gchar ***)entry->arg_data;
1247 change->allocated.array.data = g_new (gchar *, 2);
1250 change->allocated.array.data =
1251 g_renew (gchar *, change->allocated.array.data,
1252 change->allocated.array.len + 2);
1254 change->allocated.array.data[change->allocated.array.len] = data;
1255 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1257 change->allocated.array.len ++;
1259 *(gchar ***)entry->arg_data = change->allocated.array.data;
1264 case G_OPTION_ARG_FILENAME:
1269 if (!context->strv_mode)
1270 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1272 data = g_strdup (value);
1277 data = g_strdup (value);
1279 change = get_change (context, G_OPTION_ARG_FILENAME,
1281 g_free (change->allocated.str);
1283 change->prev.str = *(gchar **)entry->arg_data;
1284 change->allocated.str = data;
1286 *(gchar **)entry->arg_data = data;
1290 case G_OPTION_ARG_FILENAME_ARRAY:
1295 if (!context->strv_mode)
1296 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1298 data = g_strdup (value);
1303 data = g_strdup (value);
1305 change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
1308 if (change->allocated.array.len == 0)
1310 change->prev.array = *(gchar ***)entry->arg_data;
1311 change->allocated.array.data = g_new (gchar *, 2);
1314 change->allocated.array.data =
1315 g_renew (gchar *, change->allocated.array.data,
1316 change->allocated.array.len + 2);
1318 change->allocated.array.data[change->allocated.array.len] = data;
1319 change->allocated.array.data[change->allocated.array.len + 1] = NULL;
1321 change->allocated.array.len ++;
1323 *(gchar ***)entry->arg_data = change->allocated.array.data;
1328 case G_OPTION_ARG_INT:
1332 if (!parse_int (option_name, value,
1337 change = get_change (context, G_OPTION_ARG_INT,
1339 change->prev.integer = *(gint *)entry->arg_data;
1340 *(gint *)entry->arg_data = data;
1343 case G_OPTION_ARG_CALLBACK:
1348 if (!value && entry->flags & G_OPTION_FLAG_OPTIONAL_ARG)
1350 else if (entry->flags & G_OPTION_FLAG_NO_ARG)
1352 else if (entry->flags & G_OPTION_FLAG_FILENAME)
1355 if (!context->strv_mode)
1356 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1358 data = g_strdup (value);
1360 data = g_strdup (value);
1364 data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
1366 if (!(entry->flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG)) &&
1370 retval = (* (GOptionArgFunc) entry->arg_data) (option_name, data, group->user_data, error);
1372 if (!retval && error != NULL && *error == NULL)
1374 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1375 _("Error parsing option %s"), option_name);
1383 case G_OPTION_ARG_DOUBLE:
1387 if (!parse_double (option_name, value,
1394 change = get_change (context, G_OPTION_ARG_DOUBLE,
1396 change->prev.dbl = *(gdouble *)entry->arg_data;
1397 *(gdouble *)entry->arg_data = data;
1400 case G_OPTION_ARG_INT64:
1404 if (!parse_int64 (option_name, value,
1411 change = get_change (context, G_OPTION_ARG_INT64,
1413 change->prev.int64 = *(gint64 *)entry->arg_data;
1414 *(gint64 *)entry->arg_data = data;
1418 g_assert_not_reached ();
1425 parse_short_option (GOptionContext *context,
1426 GOptionGroup *group,
1437 for (j = 0; j < group->n_entries; j++)
1439 if (arg == group->entries[j].short_name)
1442 gchar *value = NULL;
1444 option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
1446 if (NO_ARG (&group->entries[j]))
1453 G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
1454 _("Error parsing option %s"), option_name);
1455 g_free (option_name);
1459 if (idx < *argc - 1)
1461 if (!OPTIONAL_ARG (&group->entries[j]))
1463 value = (*argv)[idx + 1];
1464 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1469 if ((*argv)[idx + 1][0] == '-')
1473 value = (*argv)[idx + 1];
1474 add_pending_null (context, &((*argv)[idx + 1]), NULL);
1479 else if (idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
1484 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1485 _("Missing argument for %s"), option_name);
1486 g_free (option_name);
1491 if (!parse_arg (context, group, &group->entries[j],
1492 value, option_name, error))
1494 g_free (option_name);
1498 g_free (option_name);
1507 parse_long_option (GOptionContext *context,
1508 GOptionGroup *group,
1519 for (j = 0; j < group->n_entries; j++)
1524 if (aliased && (group->entries[j].flags & G_OPTION_FLAG_NOALIAS))
1527 if (NO_ARG (&group->entries[j]) &&
1528 strcmp (arg, group->entries[j].long_name) == 0)
1533 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1534 retval = parse_arg (context, group, &group->entries[j],
1535 NULL, option_name, error);
1536 g_free (option_name);
1538 add_pending_null (context, &((*argv)[*idx]), NULL);
1545 gint len = strlen (group->entries[j].long_name);
1547 if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
1548 (arg[len] == '=' || arg[len] == 0))
1550 gchar *value = NULL;
1553 add_pending_null (context, &((*argv)[*idx]), NULL);
1554 option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
1556 if (arg[len] == '=')
1557 value = arg + len + 1;
1558 else if (*idx < *argc - 1)
1560 if (!OPTIONAL_ARG (&group->entries[j]))
1562 value = (*argv)[*idx + 1];
1563 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1568 if ((*argv)[*idx + 1][0] == '-')
1571 retval = parse_arg (context, group, &group->entries[j],
1572 NULL, option_name, error);
1574 g_free (option_name);
1579 value = (*argv)[*idx + 1];
1580 add_pending_null (context, &((*argv)[*idx + 1]), NULL);
1585 else if (*idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
1588 retval = parse_arg (context, group, &group->entries[j],
1589 NULL, option_name, error);
1591 g_free (option_name);
1597 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
1598 _("Missing argument for %s"), option_name);
1599 g_free (option_name);
1603 if (!parse_arg (context, group, &group->entries[j],
1604 value, option_name, error))
1606 g_free (option_name);
1610 g_free (option_name);
1620 parse_remaining_arg (GOptionContext *context,
1621 GOptionGroup *group,
1630 for (j = 0; j < group->n_entries; j++)
1635 if (group->entries[j].long_name[0])
1638 g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_CALLBACK ||
1639 group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
1640 group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
1642 add_pending_null (context, &((*argv)[*idx]), NULL);
1644 if (!parse_arg (context, group, &group->entries[j], (*argv)[*idx], "", error))
1655 free_changes_list (GOptionContext *context,
1660 for (list = context->changes; list != NULL; list = list->next)
1662 Change *change = list->data;
1666 switch (change->arg_type)
1668 case G_OPTION_ARG_NONE:
1669 *(gboolean *)change->arg_data = change->prev.bool;
1671 case G_OPTION_ARG_INT:
1672 *(gint *)change->arg_data = change->prev.integer;
1674 case G_OPTION_ARG_STRING:
1675 case G_OPTION_ARG_FILENAME:
1676 g_free (change->allocated.str);
1677 *(gchar **)change->arg_data = change->prev.str;
1679 case G_OPTION_ARG_STRING_ARRAY:
1680 case G_OPTION_ARG_FILENAME_ARRAY:
1681 g_strfreev (change->allocated.array.data);
1682 *(gchar ***)change->arg_data = change->prev.array;
1684 case G_OPTION_ARG_DOUBLE:
1685 *(gdouble *)change->arg_data = change->prev.dbl;
1687 case G_OPTION_ARG_INT64:
1688 *(gint64 *)change->arg_data = change->prev.int64;
1691 g_assert_not_reached ();
1698 g_list_free (context->changes);
1699 context->changes = NULL;
1703 free_pending_nulls (GOptionContext *context,
1704 gboolean perform_nulls)
1708 for (list = context->pending_nulls; list != NULL; list = list->next)
1710 PendingNull *n = list->data;
1716 /* Copy back the short options */
1718 strcpy (*n->ptr + 1, n->value);
1722 if (context->strv_mode)
1733 g_list_free (context->pending_nulls);
1734 context->pending_nulls = NULL;
1737 /* Use a platform-specific mechanism to look up the first argument to
1738 * the current process.
1739 * Note if you implement this for other platforms, also add it to
1740 * tests/option-argv0.c
1743 platform_get_argv0 (void)
1750 if (!g_file_get_contents ("/proc/self/cmdline",
1755 /* Sanity check for a NUL terminator. */
1756 if (!memchr (cmdline, 0, len))
1758 /* We could just return cmdline, but I think it's better
1759 * to hold on to a smaller malloc block; the arguments
1762 base_arg0 = g_path_get_basename (cmdline);
1765 #elif defined __OpenBSD__
1766 char **cmdline = NULL;
1768 gsize len = PATH_MAX;
1770 int mib[] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
1772 cmdline = (char **) realloc (cmdline, len);
1774 if (sysctl (mib, G_N_ELEMENTS (mib), cmdline, &len, NULL, 0) == -1)
1780 /* We could just return cmdline, but I think it's better
1781 * to hold on to a smaller malloc block; the arguments
1784 base_arg0 = g_path_get_basename (*cmdline);
1793 * g_option_context_parse:
1794 * @context: a #GOptionContext
1795 * @argc: (inout) (allow-none): a pointer to the number of command line arguments
1796 * @argv: (inout) (array length=argc) (allow-none): a pointer to the array of command line arguments
1797 * @error: a return location for errors
1799 * Parses the command line arguments, recognizing options
1800 * which have been added to @context. A side-effect of
1801 * calling this function is that g_set_prgname() will be
1804 * If the parsing is successful, any parsed arguments are
1805 * removed from the array and @argc and @argv are updated
1806 * accordingly. A '--' option is stripped from @argv
1807 * unless there are unparsed options before and after it,
1808 * or some of the options after it start with '-'. In case
1809 * of an error, @argc and @argv are left unmodified.
1811 * If automatic `--help` support is enabled
1812 * (see g_option_context_set_help_enabled()), and the
1813 * @argv array contains one of the recognized help options,
1814 * this function will produce help output to stdout and
1817 * Note that function depends on the [current locale][setlocale] for
1818 * automatic character set conversion of string and filename
1821 * Returns: %TRUE if the parsing was successful,
1822 * %FALSE if an error occurred
1827 g_option_context_parse (GOptionContext *context,
1835 /* Set program name */
1836 if (!g_get_prgname())
1840 if (argc && argv && *argc)
1841 prgname = g_path_get_basename ((*argv)[0]);
1843 prgname = platform_get_argv0 ();
1846 g_set_prgname (prgname);
1848 g_set_prgname ("<unknown>");
1853 /* Call pre-parse hooks */
1854 list = context->groups;
1857 GOptionGroup *group = list->data;
1859 if (group->pre_parse_func)
1861 if (!(* group->pre_parse_func) (context, group,
1862 group->user_data, error))
1869 if (context->main_group && context->main_group->pre_parse_func)
1871 if (!(* context->main_group->pre_parse_func) (context, context->main_group,
1872 context->main_group->user_data, error))
1878 gboolean stop_parsing = FALSE;
1879 gboolean has_unknown = FALSE;
1880 gint separator_pos = 0;
1882 for (i = 1; i < *argc; i++)
1885 gboolean parsed = FALSE;
1887 if ((*argv)[i][0] == '-' && (*argv)[i][1] != '\0' && !stop_parsing)
1889 if ((*argv)[i][1] == '-')
1893 arg = (*argv)[i] + 2;
1895 /* '--' terminates list of arguments */
1899 stop_parsing = TRUE;
1903 /* Handle help options */
1904 if (context->help_enabled)
1906 if (strcmp (arg, "help") == 0)
1907 print_help (context, TRUE, NULL);
1908 else if (strcmp (arg, "help-all") == 0)
1909 print_help (context, FALSE, NULL);
1910 else if (strncmp (arg, "help-", 5) == 0)
1912 list = context->groups;
1916 GOptionGroup *group = list->data;
1918 if (strcmp (arg + 5, group->name) == 0)
1919 print_help (context, FALSE, group);
1926 if (context->main_group &&
1927 !parse_long_option (context, context->main_group, &i, arg,
1928 FALSE, argc, argv, error, &parsed))
1934 /* Try the groups */
1935 list = context->groups;
1938 GOptionGroup *group = list->data;
1940 if (!parse_long_option (context, group, &i, arg,
1941 FALSE, argc, argv, error, &parsed))
1953 /* Now look for --<group>-<option> */
1954 dash = strchr (arg, '-');
1957 /* Try the groups */
1958 list = context->groups;
1961 GOptionGroup *group = list->data;
1963 if (strncmp (group->name, arg, dash - arg) == 0)
1965 if (!parse_long_option (context, group, &i, dash + 1,
1966 TRUE, argc, argv, error, &parsed))
1977 if (context->ignore_unknown)
1981 { /* short option */
1982 gint new_i = i, arg_length;
1983 gboolean *nulled_out = NULL;
1984 gboolean has_h_entry = context_has_h_entry (context);
1985 arg = (*argv)[i] + 1;
1986 arg_length = strlen (arg);
1987 nulled_out = g_newa (gboolean, arg_length);
1988 memset (nulled_out, 0, arg_length * sizeof (gboolean));
1989 for (j = 0; j < arg_length; j++)
1991 if (context->help_enabled && (arg[j] == '?' ||
1992 (arg[j] == 'h' && !has_h_entry)))
1993 print_help (context, TRUE, NULL);
1995 if (context->main_group &&
1996 !parse_short_option (context, context->main_group,
1998 argc, argv, error, &parsed))
2002 /* Try the groups */
2003 list = context->groups;
2006 GOptionGroup *group = list->data;
2007 if (!parse_short_option (context, group, i, &new_i, arg[j],
2008 argc, argv, error, &parsed))
2016 if (context->ignore_unknown && parsed)
2017 nulled_out[j] = TRUE;
2018 else if (context->ignore_unknown)
2022 /* !context->ignore_unknown && parsed */
2024 if (context->ignore_unknown)
2026 gchar *new_arg = NULL;
2028 for (j = 0; j < arg_length; j++)
2033 new_arg = g_malloc (arg_length + 1);
2034 new_arg[arg_index++] = arg[j];
2038 new_arg[arg_index] = '\0';
2039 add_pending_null (context, &((*argv)[i]), new_arg);
2043 add_pending_null (context, &((*argv)[i]), NULL);
2051 if (!parsed && !context->ignore_unknown)
2054 G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
2055 _("Unknown option %s"), (*argv)[i]);
2061 /* Collect remaining args */
2062 if (context->main_group &&
2063 !parse_remaining_arg (context, context->main_group, &i,
2064 argc, argv, error, &parsed))
2067 if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
2072 if (separator_pos > 0)
2073 add_pending_null (context, &((*argv)[separator_pos]), NULL);
2077 /* Call post-parse hooks */
2078 list = context->groups;
2081 GOptionGroup *group = list->data;
2083 if (group->post_parse_func)
2085 if (!(* group->post_parse_func) (context, group,
2086 group->user_data, error))
2093 if (context->main_group && context->main_group->post_parse_func)
2095 if (!(* context->main_group->post_parse_func) (context, context->main_group,
2096 context->main_group->user_data, error))
2102 free_pending_nulls (context, TRUE);
2104 for (i = 1; i < *argc; i++)
2106 for (k = i; k < *argc; k++)
2107 if ((*argv)[k] != NULL)
2113 for (j = i + k; j < *argc; j++)
2115 (*argv)[j-k] = (*argv)[j];
2127 /* Call error hooks */
2128 list = context->groups;
2131 GOptionGroup *group = list->data;
2133 if (group->error_func)
2134 (* group->error_func) (context, group,
2135 group->user_data, error);
2140 if (context->main_group && context->main_group->error_func)
2141 (* context->main_group->error_func) (context, context->main_group,
2142 context->main_group->user_data, error);
2144 free_changes_list (context, TRUE);
2145 free_pending_nulls (context, FALSE);
2151 * g_option_group_new:
2152 * @name: the name for the option group, this is used to provide
2153 * help for the options in this group with `--help-`@name
2154 * @description: a description for this group to be shown in
2155 * `--help`. This string is translated using the translation
2156 * domain or translation function of the group
2157 * @help_description: a description for the `--help-`@name option.
2158 * This string is translated using the translation domain or translation function
2160 * @user_data: (allow-none): user data that will be passed to the pre- and post-parse hooks,
2161 * the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
2162 * @destroy: (allow-none): a function that will be called to free @user_data, or %NULL
2164 * Creates a new #GOptionGroup.
2166 * Returns: a newly created option group. It should be added
2167 * to a #GOptionContext or freed with g_option_group_free().
2172 g_option_group_new (const gchar *name,
2173 const gchar *description,
2174 const gchar *help_description,
2176 GDestroyNotify destroy)
2179 GOptionGroup *group;
2181 group = g_new0 (GOptionGroup, 1);
2182 group->name = g_strdup (name);
2183 group->description = g_strdup (description);
2184 group->help_description = g_strdup (help_description);
2185 group->user_data = user_data;
2186 group->destroy_notify = destroy;
2193 * g_option_group_free:
2194 * @group: a #GOptionGroup
2196 * Frees a #GOptionGroup. Note that you must not free groups
2197 * which have been added to a #GOptionContext.
2202 g_option_group_free (GOptionGroup *group)
2204 g_return_if_fail (group != NULL);
2206 g_free (group->name);
2207 g_free (group->description);
2208 g_free (group->help_description);
2210 g_free (group->entries);
2212 if (group->destroy_notify)
2213 (* group->destroy_notify) (group->user_data);
2215 if (group->translate_notify)
2216 (* group->translate_notify) (group->translate_data);
2223 * g_option_group_add_entries:
2224 * @group: a #GOptionGroup
2225 * @entries: a %NULL-terminated array of #GOptionEntrys
2227 * Adds the options specified in @entries to @group.
2232 g_option_group_add_entries (GOptionGroup *group,
2233 const GOptionEntry *entries)
2237 g_return_if_fail (entries != NULL);
2239 for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++) ;
2241 group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
2243 memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
2245 for (i = group->n_entries; i < group->n_entries + n_entries; i++)
2247 gchar c = group->entries[i].short_name;
2249 if (c == '-' || (c != 0 && !g_ascii_isprint (c)))
2251 g_warning (G_STRLOC ": ignoring invalid short option '%c' (%d) in entry %s:%s",
2252 c, c, group->name, group->entries[i].long_name);
2253 group->entries[i].short_name = '\0';
2256 if (group->entries[i].arg != G_OPTION_ARG_NONE &&
2257 (group->entries[i].flags & G_OPTION_FLAG_REVERSE) != 0)
2259 g_warning (G_STRLOC ": ignoring reverse flag on option of arg-type %d in entry %s:%s",
2260 group->entries[i].arg, group->name, group->entries[i].long_name);
2262 group->entries[i].flags &= ~G_OPTION_FLAG_REVERSE;
2265 if (group->entries[i].arg != G_OPTION_ARG_CALLBACK &&
2266 (group->entries[i].flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG|G_OPTION_FLAG_FILENAME)) != 0)
2268 g_warning (G_STRLOC ": ignoring no-arg, optional-arg or filename flags (%d) on option of arg-type %d in entry %s:%s",
2269 group->entries[i].flags, group->entries[i].arg, group->name, group->entries[i].long_name);
2271 group->entries[i].flags &= ~(G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG|G_OPTION_FLAG_FILENAME);
2275 group->n_entries += n_entries;
2279 * g_option_group_set_parse_hooks:
2280 * @group: a #GOptionGroup
2281 * @pre_parse_func: (allow-none): a function to call before parsing, or %NULL
2282 * @post_parse_func: (allow-none): a function to call after parsing, or %NULL
2284 * Associates two functions with @group which will be called
2285 * from g_option_context_parse() before the first option is parsed
2286 * and after the last option has been parsed, respectively.
2288 * Note that the user data to be passed to @pre_parse_func and
2289 * @post_parse_func can be specified when constructing the group
2290 * with g_option_group_new().
2295 g_option_group_set_parse_hooks (GOptionGroup *group,
2296 GOptionParseFunc pre_parse_func,
2297 GOptionParseFunc post_parse_func)
2299 g_return_if_fail (group != NULL);
2301 group->pre_parse_func = pre_parse_func;
2302 group->post_parse_func = post_parse_func;
2306 * g_option_group_set_error_hook:
2307 * @group: a #GOptionGroup
2308 * @error_func: a function to call when an error occurs
2310 * Associates a function with @group which will be called
2311 * from g_option_context_parse() when an error occurs.
2313 * Note that the user data to be passed to @error_func can be
2314 * specified when constructing the group with g_option_group_new().
2319 g_option_group_set_error_hook (GOptionGroup *group,
2320 GOptionErrorFunc error_func)
2322 g_return_if_fail (group != NULL);
2324 group->error_func = error_func;
2329 * g_option_group_set_translate_func:
2330 * @group: a #GOptionGroup
2331 * @func: (allow-none): the #GTranslateFunc, or %NULL
2332 * @data: (allow-none): user data to pass to @func, or %NULL
2333 * @destroy_notify: (allow-none): a function which gets called to free @data, or %NULL
2335 * Sets the function which is used to translate user-visible strings,
2336 * for `--help` output. Different groups can use different
2337 * #GTranslateFuncs. If @func is %NULL, strings are not translated.
2339 * If you are using gettext(), you only need to set the translation
2340 * domain, see g_option_group_set_translation_domain().
2345 g_option_group_set_translate_func (GOptionGroup *group,
2346 GTranslateFunc func,
2348 GDestroyNotify destroy_notify)
2350 g_return_if_fail (group != NULL);
2352 if (group->translate_notify)
2353 group->translate_notify (group->translate_data);
2355 group->translate_func = func;
2356 group->translate_data = data;
2357 group->translate_notify = destroy_notify;
2360 static const gchar *
2361 dgettext_swapped (const gchar *msgid,
2362 const gchar *domainname)
2364 return g_dgettext (domainname, msgid);
2368 * g_option_group_set_translation_domain:
2369 * @group: a #GOptionGroup
2370 * @domain: the domain to use
2372 * A convenience function to use gettext() for translating
2373 * user-visible strings.
2378 g_option_group_set_translation_domain (GOptionGroup *group,
2379 const gchar *domain)
2381 g_return_if_fail (group != NULL);
2383 g_option_group_set_translate_func (group,
2384 (GTranslateFunc)dgettext_swapped,
2390 * g_option_context_set_translate_func:
2391 * @context: a #GOptionContext
2392 * @func: (allow-none): the #GTranslateFunc, or %NULL
2393 * @data: (allow-none): user data to pass to @func, or %NULL
2394 * @destroy_notify: (allow-none): a function which gets called to free @data, or %NULL
2396 * Sets the function which is used to translate the contexts
2397 * user-visible strings, for `--help` output. If @func is %NULL,
2398 * strings are not translated.
2400 * Note that option groups have their own translation functions,
2401 * this function only affects the @parameter_string (see g_option_context_new()),
2402 * the summary (see g_option_context_set_summary()) and the description
2403 * (see g_option_context_set_description()).
2405 * If you are using gettext(), you only need to set the translation
2406 * domain, see g_option_context_set_translation_domain().
2411 g_option_context_set_translate_func (GOptionContext *context,
2412 GTranslateFunc func,
2414 GDestroyNotify destroy_notify)
2416 g_return_if_fail (context != NULL);
2418 if (context->translate_notify)
2419 context->translate_notify (context->translate_data);
2421 context->translate_func = func;
2422 context->translate_data = data;
2423 context->translate_notify = destroy_notify;
2427 * g_option_context_set_translation_domain:
2428 * @context: a #GOptionContext
2429 * @domain: the domain to use
2431 * A convenience function to use gettext() for translating
2432 * user-visible strings.
2437 g_option_context_set_translation_domain (GOptionContext *context,
2438 const gchar *domain)
2440 g_return_if_fail (context != NULL);
2442 g_option_context_set_translate_func (context,
2443 (GTranslateFunc)dgettext_swapped,
2449 * g_option_context_set_summary:
2450 * @context: a #GOptionContext
2451 * @summary: (allow-none): a string to be shown in `--help` output
2452 * before the list of options, or %NULL
2454 * Adds a string to be displayed in `--help` output before the list
2455 * of options. This is typically a summary of the program functionality.
2457 * Note that the summary is translated (see
2458 * g_option_context_set_translate_func() and
2459 * g_option_context_set_translation_domain()).
2464 g_option_context_set_summary (GOptionContext *context,
2465 const gchar *summary)
2467 g_return_if_fail (context != NULL);
2469 g_free (context->summary);
2470 context->summary = g_strdup (summary);
2475 * g_option_context_get_summary:
2476 * @context: a #GOptionContext
2478 * Returns the summary. See g_option_context_set_summary().
2480 * Returns: the summary
2485 g_option_context_get_summary (GOptionContext *context)
2487 g_return_val_if_fail (context != NULL, NULL);
2489 return context->summary;
2493 * g_option_context_set_description:
2494 * @context: a #GOptionContext
2495 * @description: (allow-none): a string to be shown in `--help` output
2496 * after the list of options, or %NULL
2498 * Adds a string to be displayed in `--help` output after the list
2499 * of options. This text often includes a bug reporting address.
2501 * Note that the summary is translated (see
2502 * g_option_context_set_translate_func()).
2507 g_option_context_set_description (GOptionContext *context,
2508 const gchar *description)
2510 g_return_if_fail (context != NULL);
2512 g_free (context->description);
2513 context->description = g_strdup (description);
2518 * g_option_context_get_description:
2519 * @context: a #GOptionContext
2521 * Returns the description. See g_option_context_set_description().
2523 * Returns: the description
2528 g_option_context_get_description (GOptionContext *context)
2530 g_return_val_if_fail (context != NULL, NULL);
2532 return context->description;
2536 * g_option_context_parse_strv:
2537 * @context: a #GOptionContext
2538 * @arguments: (inout) (array null-terminated=1): a pointer to the
2539 * command line arguments (which must be in UTF-8 on Windows)
2540 * @error: a return location for errors
2542 * Parses the command line arguments.
2544 * This function is similar to g_option_context_parse() except that it
2545 * respects the normal memory rules when dealing with a strv instead of
2546 * assuming that the passed-in array is the argv of the main function.
2548 * In particular, strings that are removed from the arguments list will
2549 * be freed using g_free().
2551 * On Windows, the strings are expected to be in UTF-8. This is in
2552 * contrast to g_option_context_parse() which expects them to be in the
2553 * system codepage, which is how they are passed as @argv to main().
2554 * See g_win32_get_command_line() for a solution.
2556 * This function is useful if you are trying to use #GOptionContext with
2559 * Returns: %TRUE if the parsing was successful,
2560 * %FALSE if an error occurred
2565 g_option_context_parse_strv (GOptionContext *context,
2572 context->strv_mode = TRUE;
2573 argc = g_strv_length (*arguments);
2574 success = g_option_context_parse (context, &argc, arguments, error);
2575 context->strv_mode = FALSE;