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glib/glib/goption.c
Philip Withnall 40a64131d1 goption: Treat an empty option context parameter string as NULL 
Otherwise the code ends up calling `gettext ("")`, which returns the
current translation’s header. The caller should really have provided a
NULL, parameter string, but the empty string is clear enough.

See
https://gitlab.freedesktop.org/accountsservice/accountsservice/-/merge_requests/56.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
2020-05-01 14:37:30 +01:00

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/* goption.c - Option parser
*
* Copyright (C) 1999, 2003 Red Hat Software
* Copyright (C) 2004 Anders Carlsson <andersca@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:option
* @Short_description: parses commandline options
* @Title: Commandline option parser
*
* The GOption commandline parser is intended to be a simpler replacement
* for the popt library. It supports short and long commandline options,
* as shown in the following example:
*
* `testtreemodel -r 1 --max-size 20 --rand --display=:1.0 -vb -- file1 file2`
*
* The example demonstrates a number of features of the GOption
* commandline parser:
*
* - Options can be single letters, prefixed by a single dash.
*
* - Multiple short options can be grouped behind a single dash.
*
* - Long options are prefixed by two consecutive dashes.
*
* - Options can have an extra argument, which can be a number, a string or
* a filename. For long options, the extra argument can be appended with
* an equals sign after the option name, which is useful if the extra
* argument starts with a dash, which would otherwise cause it to be
* interpreted as another option.
*
* - Non-option arguments are returned to the application as rest arguments.
*
* - An argument consisting solely of two dashes turns off further parsing,
* any remaining arguments (even those starting with a dash) are returned
* to the application as rest arguments.
*
* Another important feature of GOption is that it can automatically
* generate nicely formatted help output. Unless it is explicitly turned
* off with g_option_context_set_help_enabled(), GOption will recognize
* the `--help`, `-?`, `--help-all` and `--help-groupname` options
* (where `groupname` is the name of a #GOptionGroup) and write a text
* similar to the one shown in the following example to stdout.
*
* |[
* Usage:
* testtreemodel [OPTION...] - test tree model performance
*
* Help Options:
* -h, --help Show help options
* --help-all Show all help options
* --help-gtk Show GTK+ Options
*
* Application Options:
* -r, --repeats=N Average over N repetitions
* -m, --max-size=M Test up to 2^M items
* --display=DISPLAY X display to use
* -v, --verbose Be verbose
* -b, --beep Beep when done
* --rand Randomize the data
* ]|
*
* GOption groups options in #GOptionGroups, which makes it easy to
* incorporate options from multiple sources. The intended use for this is
* to let applications collect option groups from the libraries it uses,
* add them to their #GOptionContext, and parse all options by a single call
* to g_option_context_parse(). See gtk_get_option_group() for an example.
*
* If an option is declared to be of type string or filename, GOption takes
* care of converting it to the right encoding; strings are returned in
* UTF-8, filenames are returned in the GLib filename encoding. Note that
* this only works if setlocale() has been called before
* g_option_context_parse().
*
* Here is a complete example of setting up GOption to parse the example
* commandline above and produce the example help output.
* |[<!-- language="C" -->
* static gint repeats = 2;
* static gint max_size = 8;
* static gboolean verbose = FALSE;
* static gboolean beep = FALSE;
* static gboolean randomize = FALSE;
*
* static GOptionEntry entries[] =
* {
* { "repeats", 'r', 0, G_OPTION_ARG_INT, &repeats, "Average over N repetitions", "N" },
* { "max-size", 'm', 0, G_OPTION_ARG_INT, &max_size, "Test up to 2^M items", "M" },
* { "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, "Be verbose", NULL },
* { "beep", 'b', 0, G_OPTION_ARG_NONE, &beep, "Beep when done", NULL },
* { "rand", 0, 0, G_OPTION_ARG_NONE, &randomize, "Randomize the data", NULL },
* { NULL }
* };
*
* int
* main (int argc, char *argv[])
* {
* GError *error = NULL;
* GOptionContext *context;
*
* context = g_option_context_new ("- test tree model performance");
* g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
* g_option_context_add_group (context, gtk_get_option_group (TRUE));
* if (!g_option_context_parse (context, &argc, &argv, &error))
* {
* g_print ("option parsing failed: %s\n", error->message);
* exit (1);
* }
*
* ...
*
* }
* ]|
*
* On UNIX systems, the argv that is passed to main() has no particular
* encoding, even to the extent that different parts of it may have
* different encodings. In general, normal arguments and flags will be
* in the current locale and filenames should be considered to be opaque
* byte strings. Proper use of %G_OPTION_ARG_FILENAME vs
* %G_OPTION_ARG_STRING is therefore important.
*
* Note that on Windows, filenames do have an encoding, but using
* #GOptionContext with the argv as passed to main() will result in a
* program that can only accept commandline arguments with characters
* from the system codepage. This can cause problems when attempting to
* deal with filenames containing Unicode characters that fall outside
* of the codepage.
*
* A solution to this is to use g_win32_get_command_line() and
* g_option_context_parse_strv() which will properly handle full Unicode
* filenames. If you are using #GApplication, this is done
* automatically for you.
*
* The following example shows how you can use #GOptionContext directly
* in order to correctly deal with Unicode filenames on Windows:
*
* |[<!-- language="C" -->
* int
* main (int argc, char **argv)
* {
* GError *error = NULL;
* GOptionContext *context;
* gchar **args;
*
* #ifdef G_OS_WIN32
* args = g_win32_get_command_line ();
* #else
* args = g_strdupv (argv);
* #endif
*
* // set up context
*
* if (!g_option_context_parse_strv (context, &args, &error))
* {
* // error happened
* }
*
* ...
*
* g_strfreev (args);
*
* ...
* }
* ]|
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#if defined __OpenBSD__
#include <unistd.h>
#include <sys/sysctl.h>
#endif
#include "goption.h"
#include "gprintf.h"
#include "glibintl.h"
#if defined G_OS_WIN32
#include <windows.h>
#endif
#define TRANSLATE(group, str) (((group)->translate_func ? (* (group)->translate_func) ((str), (group)->translate_data) : (str)))
#define NO_ARG(entry) ((entry)->arg == G_OPTION_ARG_NONE || \
((entry)->arg == G_OPTION_ARG_CALLBACK && \
((entry)->flags & G_OPTION_FLAG_NO_ARG)))
#define OPTIONAL_ARG(entry) ((entry)->arg == G_OPTION_ARG_CALLBACK && \
(entry)->flags & G_OPTION_FLAG_OPTIONAL_ARG)
typedef struct
{
GOptionArg arg_type;
gpointer arg_data;
union
{
gboolean bool;
gint integer;
gchar *str;
gchar **array;
gdouble dbl;
gint64 int64;
} prev;
union
{
gchar *str;
struct
{
gint len;
gchar **data;
} array;
} allocated;
} Change;
typedef struct
{
gchar **ptr;
gchar *value;
} PendingNull;
struct _GOptionContext
{
GList *groups;
gchar *parameter_string; /* (nullable) */
gchar *summary;
gchar *description;
GTranslateFunc translate_func;
GDestroyNotify translate_notify;
gpointer translate_data;
guint help_enabled : 1;
guint ignore_unknown : 1;
guint strv_mode : 1;
guint strict_posix : 1;
GOptionGroup *main_group;
/* We keep a list of change so we can revert them */
GList *changes;
/* We also keep track of all argv elements
* that should be NULLed or modified.
*/
GList *pending_nulls;
};
struct _GOptionGroup
{
gchar *name;
gchar *description;
gchar *help_description;
gint ref_count;
GDestroyNotify destroy_notify;
gpointer user_data;
GTranslateFunc translate_func;
GDestroyNotify translate_notify;
gpointer translate_data;
GOptionEntry *entries;
gsize n_entries;
GOptionParseFunc pre_parse_func;
GOptionParseFunc post_parse_func;
GOptionErrorFunc error_func;
};
static void free_changes_list (GOptionContext *context,
gboolean revert);
static void free_pending_nulls (GOptionContext *context,
gboolean perform_nulls);
static int
_g_unichar_get_width (gunichar c)
{
if (G_UNLIKELY (g_unichar_iszerowidth (c)))
return 0;
/* we ignore the fact that we should call g_unichar_iswide_cjk() under
* some locales (legacy East Asian ones) */
if (g_unichar_iswide (c))
return 2;
return 1;
}
static glong
_g_utf8_strwidth (const gchar *p)
{
glong len = 0;
g_return_val_if_fail (p != NULL, 0);
while (*p)
{
len += _g_unichar_get_width (g_utf8_get_char (p));
p = g_utf8_next_char (p);
}
return len;
}
G_DEFINE_QUARK (g-option-context-error-quark, g_option_error)
/**
* g_option_context_new:
* @parameter_string: (nullable): a string which is displayed in
* the first line of `--help` output, after the usage summary
* `programname [OPTION...]`
*
* Creates a new option context.
*
* The @parameter_string can serve multiple purposes. It can be used
* to add descriptions for "rest" arguments, which are not parsed by
* the #GOptionContext, typically something like "FILES" or
* "FILE1 FILE2...". If you are using #G_OPTION_REMAINING for
* collecting "rest" arguments, GLib handles this automatically by
* using the @arg_description of the corresponding #GOptionEntry in
* the usage summary.
*
* Another usage is to give a short summary of the program
* functionality, like " - frob the strings", which will be displayed
* in the same line as the usage. For a longer description of the
* program functionality that should be displayed as a paragraph
* below the usage line, use g_option_context_set_summary().
*
* Note that the @parameter_string is translated using the
* function set with g_option_context_set_translate_func(), so
* it should normally be passed untranslated.
*
* Returns: a newly created #GOptionContext, which must be
* freed with g_option_context_free() after use.
*
* Since: 2.6
*/
GOptionContext *
g_option_context_new (const gchar *parameter_string)
{
GOptionContext *context;
context = g_new0 (GOptionContext, 1);
/* Clear the empty string to NULL, otherwise we end up calling gettext(""),
* which returns the translation header. */
if (parameter_string != NULL && *parameter_string == '\0')
parameter_string = NULL;
context->parameter_string = g_strdup (parameter_string);
context->strict_posix = FALSE;
context->help_enabled = TRUE;
context->ignore_unknown = FALSE;
return context;
}
/**
* g_option_context_free:
* @context: a #GOptionContext
*
* Frees context and all the groups which have been
* added to it.
*
* Please note that parsed arguments need to be freed separately (see
* #GOptionEntry).
*
* Since: 2.6
*/
void g_option_context_free (GOptionContext *context)
{
g_return_if_fail (context != NULL);
g_list_free_full (context->groups, (GDestroyNotify) g_option_group_unref);
if (context->main_group)
g_option_group_unref (context->main_group);
free_changes_list (context, FALSE);
free_pending_nulls (context, FALSE);
g_free (context->parameter_string);
g_free (context->summary);
g_free (context->description);
if (context->translate_notify)
(* context->translate_notify) (context->translate_data);
g_free (context);
}
/**
* g_option_context_set_help_enabled:
* @context: a #GOptionContext
* @help_enabled: %TRUE to enable `--help`, %FALSE to disable it
*
* Enables or disables automatic generation of `--help` output.
* By default, g_option_context_parse() recognizes `--help`, `-h`,
* `-?`, `--help-all` and `--help-groupname` and creates suitable
* output to stdout.
*
* Since: 2.6
*/
void g_option_context_set_help_enabled (GOptionContext *context,
gboolean help_enabled)
{
g_return_if_fail (context != NULL);
context->help_enabled = help_enabled;
}
/**
* g_option_context_get_help_enabled:
* @context: a #GOptionContext
*
* Returns whether automatic `--help` generation
* is turned on for @context. See g_option_context_set_help_enabled().
*
* Returns: %TRUE if automatic help generation is turned on.
*
* Since: 2.6
*/
gboolean
g_option_context_get_help_enabled (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, FALSE);
return context->help_enabled;
}
/**
* g_option_context_set_ignore_unknown_options:
* @context: a #GOptionContext
* @ignore_unknown: %TRUE to ignore unknown options, %FALSE to produce
* an error when unknown options are met
*
* Sets whether to ignore unknown options or not. If an argument is
* ignored, it is left in the @argv array after parsing. By default,
* g_option_context_parse() treats unknown options as error.
*
* This setting does not affect non-option arguments (i.e. arguments
* which don't start with a dash). But note that GOption cannot reliably
* determine whether a non-option belongs to a preceding unknown option.
*
* Since: 2.6
**/
void
g_option_context_set_ignore_unknown_options (GOptionContext *context,
gboolean ignore_unknown)
{
g_return_if_fail (context != NULL);
context->ignore_unknown = ignore_unknown;
}
/**
* g_option_context_get_ignore_unknown_options:
* @context: a #GOptionContext
*
* Returns whether unknown options are ignored or not. See
* g_option_context_set_ignore_unknown_options().
*
* Returns: %TRUE if unknown options are ignored.
*
* Since: 2.6
**/
gboolean
g_option_context_get_ignore_unknown_options (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, FALSE);
return context->ignore_unknown;
}
/**
* g_option_context_set_strict_posix:
* @context: a #GOptionContext
* @strict_posix: the new value
*
* Sets strict POSIX mode.
*
* By default, this mode is disabled.
*
* In strict POSIX mode, the first non-argument parameter encountered
* (eg: filename) terminates argument processing. Remaining arguments
* are treated as non-options and are not attempted to be parsed.
*
* If strict POSIX mode is disabled then parsing is done in the GNU way
* where option arguments can be freely mixed with non-options.
*
* As an example, consider "ls foo -l". With GNU style parsing, this
* will list "foo" in long mode. In strict POSIX style, this will list
* the files named "foo" and "-l".
*
* It may be useful to force strict POSIX mode when creating "verb
* style" command line tools. For example, the "gsettings" command line
* tool supports the global option "--schemadir" as well as many
* subcommands ("get", "set", etc.) which each have their own set of
* arguments. Using strict POSIX mode will allow parsing the global
* options up to the verb name while leaving the remaining options to be
* parsed by the relevant subcommand (which can be determined by
* examining the verb name, which should be present in argv[1] after
* parsing).
*
* Since: 2.44
**/
void
g_option_context_set_strict_posix (GOptionContext *context,
gboolean strict_posix)
{
g_return_if_fail (context != NULL);
context->strict_posix = strict_posix;
}
/**
* g_option_context_get_strict_posix:
* @context: a #GOptionContext
*
* Returns whether strict POSIX code is enabled.
*
* See g_option_context_set_strict_posix() for more information.
*
* Returns: %TRUE if strict POSIX is enabled, %FALSE otherwise.
*
* Since: 2.44
**/
gboolean
g_option_context_get_strict_posix (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, FALSE);
return context->strict_posix;
}
/**
* g_option_context_add_group:
* @context: a #GOptionContext
* @group: (transfer full): the group to add
*
* Adds a #GOptionGroup to the @context, so that parsing with @context
* will recognize the options in the group. Note that this will take
* ownership of the @group and thus the @group should not be freed.
*
* Since: 2.6
**/
void
g_option_context_add_group (GOptionContext *context,
GOptionGroup *group)
{
GList *list;
g_return_if_fail (context != NULL);
g_return_if_fail (group != NULL);
g_return_if_fail (group->name != NULL);
g_return_if_fail (group->description != NULL);
g_return_if_fail (group->help_description != NULL);
for (list = context->groups; list; list = list->next)
{
GOptionGroup *g = (GOptionGroup *)list->data;
if ((group->name == NULL && g->name == NULL) ||
(group->name && g->name && strcmp (group->name, g->name) == 0))
g_warning ("A group named \"%s\" is already part of this GOptionContext",
group->name);
}
context->groups = g_list_append (context->groups, group);
}
/**
* g_option_context_set_main_group:
* @context: a #GOptionContext
* @group: (transfer full): the group to set as main group
*
* Sets a #GOptionGroup as main group of the @context.
* This has the same effect as calling g_option_context_add_group(),
* the only difference is that the options in the main group are
* treated differently when generating `--help` output.
*
* Since: 2.6
**/
void
g_option_context_set_main_group (GOptionContext *context,
GOptionGroup *group)
{
g_return_if_fail (context != NULL);
g_return_if_fail (group != NULL);
if (context->main_group)
{
g_warning ("This GOptionContext already has a main group");
return;
}
context->main_group = group;
}
/**
* g_option_context_get_main_group:
* @context: a #GOptionContext
*
* Returns a pointer to the main group of @context.
*
* Returns: (transfer none): the main group of @context, or %NULL if
* @context doesn't have a main group. Note that group belongs to
* @context and should not be modified or freed.
*
* Since: 2.6
**/
GOptionGroup *
g_option_context_get_main_group (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, NULL);
return context->main_group;
}
/**
* g_option_context_add_main_entries:
* @context: a #GOptionContext
* @entries: (array zero-terminated=1): a %NULL-terminated array of #GOptionEntrys
* @translation_domain: (nullable): a translation domain to use for translating
* the `--help` output for the options in @entries
* with gettext(), or %NULL
*
* A convenience function which creates a main group if it doesn't
* exist, adds the @entries to it and sets the translation domain.
*
* Since: 2.6
**/
void
g_option_context_add_main_entries (GOptionContext *context,
const GOptionEntry *entries,
const gchar *translation_domain)
{
g_return_if_fail (context != NULL);
g_return_if_fail (entries != NULL);
if (!context->main_group)
context->main_group = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
g_option_group_add_entries (context->main_group, entries);
g_option_group_set_translation_domain (context->main_group, translation_domain);
}
static gint
calculate_max_length (GOptionGroup *group,
GHashTable *aliases)
{
GOptionEntry *entry;
gsize i, len, max_length;
const gchar *long_name;
max_length = 0;
for (i = 0; i < group->n_entries; i++)
{
entry = &group->entries[i];
if (entry->flags & G_OPTION_FLAG_HIDDEN)
continue;
long_name = g_hash_table_lookup (aliases, &entry->long_name);
if (!long_name)
long_name = entry->long_name;
len = _g_utf8_strwidth (long_name);
if (entry->short_name)
len += 4;
if (!NO_ARG (entry) && entry->arg_description)
len += 1 + _g_utf8_strwidth (TRANSLATE (group, entry->arg_description));
max_length = MAX (max_length, len);
}
return max_length;
}
static void
print_entry (GOptionGroup *group,
gint max_length,
const GOptionEntry *entry,
GString *string,
GHashTable *aliases)
{
GString *str;
const gchar *long_name;
if (entry->flags & G_OPTION_FLAG_HIDDEN)
return;
if (entry->long_name[0] == 0)
return;
long_name = g_hash_table_lookup (aliases, &entry->long_name);
if (!long_name)
long_name = entry->long_name;
str = g_string_new (NULL);
if (entry->short_name)
g_string_append_printf (str, " -%c, --%s", entry->short_name, long_name);
else
g_string_append_printf (str, " --%s", long_name);
if (entry->arg_description)
g_string_append_printf (str, "=%s", TRANSLATE (group, entry->arg_description));
g_string_append_printf (string, "%s%*s %s\n", str->str,
(int) (max_length + 4 - _g_utf8_strwidth (str->str)), "",
entry->description ? TRANSLATE (group, entry->description) : "");
g_string_free (str, TRUE);
}
static gboolean
group_has_visible_entries (GOptionContext *context,
GOptionGroup *group,
gboolean main_entries)
{
GOptionFlags reject_filter = G_OPTION_FLAG_HIDDEN;
GOptionEntry *entry;
gint i, l;
gboolean main_group = group == context->main_group;
if (!main_entries)
reject_filter |= G_OPTION_FLAG_IN_MAIN;
for (i = 0, l = (group ? group->n_entries : 0); i < l; i++)
{
entry = &group->entries[i];
if (main_entries && !main_group && !(entry->flags & G_OPTION_FLAG_IN_MAIN))
continue;
if (entry->long_name[0] == 0) /* ignore rest entry */
continue;
if (!(entry->flags & reject_filter))
return TRUE;
}
return FALSE;
}
static gboolean
group_list_has_visible_entries (GOptionContext *context,
GList *group_list,
gboolean main_entries)
{
while (group_list)
{
if (group_has_visible_entries (context, group_list->data, main_entries))
return TRUE;
group_list = group_list->next;
}
return FALSE;
}
static gboolean
context_has_h_entry (GOptionContext *context)
{
gsize i;
GList *list;
if (context->main_group)
{
for (i = 0; i < context->main_group->n_entries; i++)
{
if (context->main_group->entries[i].short_name == 'h')
return TRUE;
}
}
for (list = context->groups; list != NULL; list = g_list_next (list))
{
GOptionGroup *group;
group = (GOptionGroup*)list->data;
for (i = 0; i < group->n_entries; i++)
{
if (group->entries[i].short_name == 'h')
return TRUE;
}
}
return FALSE;
}
/**
* g_option_context_get_help:
* @context: a #GOptionContext
* @main_help: if %TRUE, only include the main group
* @group: (nullable): the #GOptionGroup to create help for, or %NULL
*
* Returns a formatted, translated help text for the given context.
* To obtain the text produced by `--help`, call
* `g_option_context_get_help (context, TRUE, NULL)`.
* To obtain the text produced by `--help-all`, call
* `g_option_context_get_help (context, FALSE, NULL)`.
* To obtain the help text for an option group, call
* `g_option_context_get_help (context, FALSE, group)`.
*
* Returns: A newly allocated string containing the help text
*
* Since: 2.14
*/
gchar *
g_option_context_get_help (GOptionContext *context,
gboolean main_help,
GOptionGroup *group)
{
GList *list;
gint max_length = 0, len;
gsize i;
GOptionEntry *entry;
GHashTable *shadow_map;
GHashTable *aliases;
gboolean seen[256];
const gchar *rest_description;
GString *string;
guchar token;
g_return_val_if_fail (context != NULL, NULL);
string = g_string_sized_new (1024);
rest_description = NULL;
if (context->main_group)
{
for (i = 0; i < context->main_group->n_entries; i++)
{
entry = &context->main_group->entries[i];
if (entry->long_name[0] == 0)
{
rest_description = TRANSLATE (context->main_group, entry->arg_description);
break;
}
}
}
g_string_append_printf (string, "%s\n %s", _("Usage:"), g_get_prgname ());
if (context->help_enabled ||
(context->main_group && context->main_group->n_entries > 0) ||
context->groups != NULL)
g_string_append_printf (string, " %s", _("[OPTION…]"));
if (rest_description)
{
g_string_append (string, " ");
g_string_append (string, rest_description);
}
if (context->parameter_string)
{
g_string_append (string, " ");
g_string_append (string, TRANSLATE (context, context->parameter_string));
}
g_string_append (string, "\n\n");
if (context->summary)
{
g_string_append (string, TRANSLATE (context, context->summary));
g_string_append (string, "\n\n");
}
memset (seen, 0, sizeof (gboolean) * 256);
shadow_map = g_hash_table_new (g_str_hash, g_str_equal);
aliases = g_hash_table_new_full (NULL, NULL, NULL, g_free);
if (context->main_group)
{
for (i = 0; i < context->main_group->n_entries; i++)
{
entry = &context->main_group->entries[i];
g_hash_table_insert (shadow_map,
(gpointer)entry->long_name,
entry);
if (seen[(guchar)entry->short_name])
entry->short_name = 0;
else
seen[(guchar)entry->short_name] = TRUE;
}
}
list = context->groups;
while (list != NULL)
{
GOptionGroup *g = list->data;
for (i = 0; i < g->n_entries; i++)
{
entry = &g->entries[i];
if (g_hash_table_lookup (shadow_map, entry->long_name) &&
!(entry->flags & G_OPTION_FLAG_NOALIAS))
{
g_hash_table_insert (aliases, &entry->long_name,
g_strdup_printf ("%s-%s", g->name, entry->long_name));
}
else
g_hash_table_insert (shadow_map, (gpointer)entry->long_name, entry);
if (seen[(guchar)entry->short_name] &&
!(entry->flags & G_OPTION_FLAG_NOALIAS))
entry->short_name = 0;
else
seen[(guchar)entry->short_name] = TRUE;
}
list = list->next;
}
g_hash_table_destroy (shadow_map);
list = context->groups;
if (context->help_enabled)
{
max_length = _g_utf8_strwidth ("-?, --help");
if (list)
{
len = _g_utf8_strwidth ("--help-all");
max_length = MAX (max_length, len);
}
}
if (context->main_group)
{
len = calculate_max_length (context->main_group, aliases);
max_length = MAX (max_length, len);
}
while (list != NULL)
{
GOptionGroup *g = list->data;
if (context->help_enabled)
{
/* First, we check the --help-<groupname> options */
len = _g_utf8_strwidth ("--help-") + _g_utf8_strwidth (g->name);
max_length = MAX (max_length, len);
}
/* Then we go through the entries */
len = calculate_max_length (g, aliases);
max_length = MAX (max_length, len);
list = list->next;
}
/* Add a bit of padding */
max_length += 4;
if (!group && context->help_enabled)
{
list = context->groups;
token = context_has_h_entry (context) ? '?' : 'h';
g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
_("Help Options:"), token, max_length - 4, "help",
_("Show help options"));
/* We only want --help-all when there are groups */
if (list)
g_string_append_printf (string, " --%-*s %s\n",
max_length, "help-all",
_("Show all help options"));
while (list)
{
GOptionGroup *g = list->data;
if (group_has_visible_entries (context, g, FALSE))
g_string_append_printf (string, " --help-%-*s %s\n",
max_length - 5, g->name,
TRANSLATE (g, g->help_description));
list = list->next;
}
g_string_append (string, "\n");
}
if (group)
{
/* Print a certain group */
if (group_has_visible_entries (context, group, FALSE))
{
g_string_append (string, TRANSLATE (group, group->description));
g_string_append (string, "\n");
for (i = 0; i < group->n_entries; i++)
print_entry (group, max_length, &group->entries[i], string, aliases);
g_string_append (string, "\n");
}
}
else if (!main_help)
{
/* Print all groups */
list = context->groups;
while (list)
{
GOptionGroup *g = list->data;
if (group_has_visible_entries (context, g, FALSE))
{
g_string_append (string, g->description);
g_string_append (string, "\n");
for (i = 0; i < g->n_entries; i++)
if (!(g->entries[i].flags & G_OPTION_FLAG_IN_MAIN))
print_entry (g, max_length, &g->entries[i], string, aliases);
g_string_append (string, "\n");
}
list = list->next;
}
}
/* Print application options if --help or --help-all has been specified */
if ((main_help || !group) &&
(group_has_visible_entries (context, context->main_group, TRUE) ||
group_list_has_visible_entries (context, context->groups, TRUE)))
{
list = context->groups;
if (context->help_enabled || list)
g_string_append (string, _("Application Options:"));
else
g_string_append (string, _("Options:"));
g_string_append (string, "\n");
if (context->main_group)
for (i = 0; i < context->main_group->n_entries; i++)
print_entry (context->main_group, max_length,
&context->main_group->entries[i], string, aliases);
while (list != NULL)
{
GOptionGroup *g = list->data;
/* Print main entries from other groups */
for (i = 0; i < g->n_entries; i++)
if (g->entries[i].flags & G_OPTION_FLAG_IN_MAIN)
print_entry (g, max_length, &g->entries[i], string, aliases);
list = list->next;
}
g_string_append (string, "\n");
}
if (context->description)
{
g_string_append (string, TRANSLATE (context, context->description));
g_string_append (string, "\n");
}
g_hash_table_destroy (aliases);
return g_string_free (string, FALSE);
}
G_GNUC_NORETURN
static void
print_help (GOptionContext *context,
gboolean main_help,
GOptionGroup *group)
{
gchar *help;
help = g_option_context_get_help (context, main_help, group);
g_print ("%s", help);
g_free (help);
exit (0);
}
static gboolean
parse_int (const gchar *arg_name,
const gchar *arg,
gint *result,
GError **error)
{
gchar *end;
glong tmp;
errno = 0;
tmp = strtol (arg, &end, 0);
if (*arg == '\0' || *end != '\0')
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Cannot parse integer value “%s” for %s"),
arg, arg_name);
return FALSE;
}
*result = tmp;
if (*result != tmp || errno == ERANGE)
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Integer value “%s” for %s out of range"),
arg, arg_name);
return FALSE;
}
return TRUE;
}
static gboolean
parse_double (const gchar *arg_name,
const gchar *arg,
gdouble *result,
GError **error)
{
gchar *end;
gdouble tmp;
errno = 0;
tmp = g_strtod (arg, &end);
if (*arg == '\0' || *end != '\0')
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Cannot parse double value “%s” for %s"),
arg, arg_name);
return FALSE;
}
if (errno == ERANGE)
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Double value “%s” for %s out of range"),
arg, arg_name);
return FALSE;
}
*result = tmp;
return TRUE;
}
static gboolean
parse_int64 (const gchar *arg_name,
const gchar *arg,
gint64 *result,
GError **error)
{
gchar *end;
gint64 tmp;
errno = 0;
tmp = g_ascii_strtoll (arg, &end, 0);
if (*arg == '\0' || *end != '\0')
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Cannot parse integer value “%s” for %s"),
arg, arg_name);
return FALSE;
}
if (errno == ERANGE)
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Integer value “%s” for %s out of range"),
arg, arg_name);
return FALSE;
}
*result = tmp;
return TRUE;
}
static Change *
get_change (GOptionContext *context,
GOptionArg arg_type,
gpointer arg_data)
{
GList *list;
Change *change = NULL;
for (list = context->changes; list != NULL; list = list->next)
{
change = list->data;
if (change->arg_data == arg_data)
goto found;
}
change = g_new0 (Change, 1);
change->arg_type = arg_type;
change->arg_data = arg_data;
context->changes = g_list_prepend (context->changes, change);
found:
return change;
}
static void
add_pending_null (GOptionContext *context,
gchar **ptr,
gchar *value)
{
PendingNull *n;
n = g_new0 (PendingNull, 1);
n->ptr = ptr;
n->value = value;
context->pending_nulls = g_list_prepend (context->pending_nulls, n);
}
static gboolean
parse_arg (GOptionContext *context,
GOptionGroup *group,
GOptionEntry *entry,
const gchar *value,
const gchar *option_name,
GError **error)
{
Change *change;
g_assert (value || OPTIONAL_ARG (entry) || NO_ARG (entry));
switch (entry->arg)
{
case G_OPTION_ARG_NONE:
{
(void) get_change (context, G_OPTION_ARG_NONE,
entry->arg_data);
*(gboolean *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
break;
}
case G_OPTION_ARG_STRING:
{
gchar *data;
#ifdef G_OS_WIN32
if (!context->strv_mode)
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
else
data = g_strdup (value);
#else
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
#endif
if (!data)
return FALSE;
change = get_change (context, G_OPTION_ARG_STRING,
entry->arg_data);
if (!change->allocated.str)
change->prev.str = *(gchar **)entry->arg_data;
else
g_free (change->allocated.str);
change->allocated.str = data;
*(gchar **)entry->arg_data = data;
break;
}
case G_OPTION_ARG_STRING_ARRAY:
{
gchar *data;
#ifdef G_OS_WIN32
if (!context->strv_mode)
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
else
data = g_strdup (value);
#else
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
#endif
if (!data)
return FALSE;
change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
entry->arg_data);
if (change->allocated.array.len == 0)
{
change->prev.array = *(gchar ***)entry->arg_data;
change->allocated.array.data = g_new (gchar *, 2);
}
else
change->allocated.array.data =
g_renew (gchar *, change->allocated.array.data,
change->allocated.array.len + 2);
change->allocated.array.data[change->allocated.array.len] = data;
change->allocated.array.data[change->allocated.array.len + 1] = NULL;
change->allocated.array.len ++;
*(gchar ***)entry->arg_data = change->allocated.array.data;
break;
}
case G_OPTION_ARG_FILENAME:
{
gchar *data;
#ifdef G_OS_WIN32
if (!context->strv_mode)
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
else
data = g_strdup (value);
if (!data)
return FALSE;
#else
data = g_strdup (value);
#endif
change = get_change (context, G_OPTION_ARG_FILENAME,
entry->arg_data);
if (!change->allocated.str)
change->prev.str = *(gchar **)entry->arg_data;
else
g_free (change->allocated.str);
change->allocated.str = data;
*(gchar **)entry->arg_data = data;
break;
}
case G_OPTION_ARG_FILENAME_ARRAY:
{
gchar *data;
#ifdef G_OS_WIN32
if (!context->strv_mode)
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
else
data = g_strdup (value);
if (!data)
return FALSE;
#else
data = g_strdup (value);
#endif
change = get_change (context, G_OPTION_ARG_STRING_ARRAY,
entry->arg_data);
if (change->allocated.array.len == 0)
{
change->prev.array = *(gchar ***)entry->arg_data;
change->allocated.array.data = g_new (gchar *, 2);
}
else
change->allocated.array.data =
g_renew (gchar *, change->allocated.array.data,
change->allocated.array.len + 2);
change->allocated.array.data[change->allocated.array.len] = data;
change->allocated.array.data[change->allocated.array.len + 1] = NULL;
change->allocated.array.len ++;
*(gchar ***)entry->arg_data = change->allocated.array.data;
break;
}
case G_OPTION_ARG_INT:
{
gint data;
if (!parse_int (option_name, value,
&data,
error))
return FALSE;
change = get_change (context, G_OPTION_ARG_INT,
entry->arg_data);
change->prev.integer = *(gint *)entry->arg_data;
*(gint *)entry->arg_data = data;
break;
}
case G_OPTION_ARG_CALLBACK:
{
gchar *data;
gboolean retval;
if (!value && entry->flags & G_OPTION_FLAG_OPTIONAL_ARG)
data = NULL;
else if (entry->flags & G_OPTION_FLAG_NO_ARG)
data = NULL;
else if (entry->flags & G_OPTION_FLAG_FILENAME)
{
#ifdef G_OS_WIN32
if (!context->strv_mode)
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
else
data = g_strdup (value);
#else
data = g_strdup (value);
#endif
}
else
data = g_locale_to_utf8 (value, -1, NULL, NULL, error);
if (!(entry->flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG)) &&
!data)
return FALSE;
retval = (* (GOptionArgFunc) entry->arg_data) (option_name, data, group->user_data, error);
if (!retval && error != NULL && *error == NULL)
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
_("Error parsing option %s"), option_name);
g_free (data);
return retval;
break;
}
case G_OPTION_ARG_DOUBLE:
{
gdouble data;
if (!parse_double (option_name, value,
&data,
error))
{
return FALSE;
}
change = get_change (context, G_OPTION_ARG_DOUBLE,
entry->arg_data);
change->prev.dbl = *(gdouble *)entry->arg_data;
*(gdouble *)entry->arg_data = data;
break;
}
case G_OPTION_ARG_INT64:
{
gint64 data;
if (!parse_int64 (option_name, value,
&data,
error))
{
return FALSE;
}
change = get_change (context, G_OPTION_ARG_INT64,
entry->arg_data);
change->prev.int64 = *(gint64 *)entry->arg_data;
*(gint64 *)entry->arg_data = data;
break;
}
default:
g_assert_not_reached ();
}
return TRUE;
}
static gboolean
parse_short_option (GOptionContext *context,
GOptionGroup *group,
gint idx,
gint *new_idx,
gchar arg,
gint *argc,
gchar ***argv,
GError **error,
gboolean *parsed)
{
gsize j;
for (j = 0; j < group->n_entries; j++)
{
if (arg == group->entries[j].short_name)
{
gchar *option_name;
gchar *value = NULL;
option_name = g_strdup_printf ("-%c", group->entries[j].short_name);
if (NO_ARG (&group->entries[j]))
value = NULL;
else
{
if (*new_idx > idx)
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
_("Error parsing option %s"), option_name);
g_free (option_name);
return FALSE;
}
if (idx < *argc - 1)
{
if (!OPTIONAL_ARG (&group->entries[j]))
{
value = (*argv)[idx + 1];
add_pending_null (context, &((*argv)[idx + 1]), NULL);
*new_idx = idx + 1;
}
else
{
if ((*argv)[idx + 1][0] == '-')
value = NULL;
else
{
value = (*argv)[idx + 1];
add_pending_null (context, &((*argv)[idx + 1]), NULL);
*new_idx = idx + 1;
}
}
}
else if (idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
value = NULL;
else
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Missing argument for %s"), option_name);
g_free (option_name);
return FALSE;
}
}
if (!parse_arg (context, group, &group->entries[j],
value, option_name, error))
{
g_free (option_name);
return FALSE;
}
g_free (option_name);
*parsed = TRUE;
}
}
return TRUE;
}
static gboolean
parse_long_option (GOptionContext *context,
GOptionGroup *group,
gint *idx,
gchar *arg,
gboolean aliased,
gint *argc,
gchar ***argv,
GError **error,
gboolean *parsed)
{
gsize j;
for (j = 0; j < group->n_entries; j++)
{
if (*idx >= *argc)
return TRUE;
if (aliased && (group->entries[j].flags & G_OPTION_FLAG_NOALIAS))
continue;
if (NO_ARG (&group->entries[j]) &&
strcmp (arg, group->entries[j].long_name) == 0)
{
gchar *option_name;
gboolean retval;
option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
retval = parse_arg (context, group, &group->entries[j],
NULL, option_name, error);
g_free (option_name);
add_pending_null (context, &((*argv)[*idx]), NULL);
*parsed = TRUE;
return retval;
}
else
{
gint len = strlen (group->entries[j].long_name);
if (strncmp (arg, group->entries[j].long_name, len) == 0 &&
(arg[len] == '=' || arg[len] == 0))
{
gchar *value = NULL;
gchar *option_name;
add_pending_null (context, &((*argv)[*idx]), NULL);
option_name = g_strconcat ("--", group->entries[j].long_name, NULL);
if (arg[len] == '=')
value = arg + len + 1;
else if (*idx < *argc - 1)
{
if (!OPTIONAL_ARG (&group->entries[j]))
{
value = (*argv)[*idx + 1];
add_pending_null (context, &((*argv)[*idx + 1]), NULL);
(*idx)++;
}
else
{
if ((*argv)[*idx + 1][0] == '-')
{
gboolean retval;
retval = parse_arg (context, group, &group->entries[j],
NULL, option_name, error);
*parsed = TRUE;
g_free (option_name);
return retval;
}
else
{
value = (*argv)[*idx + 1];
add_pending_null (context, &((*argv)[*idx + 1]), NULL);
(*idx)++;
}
}
}
else if (*idx >= *argc - 1 && OPTIONAL_ARG (&group->entries[j]))
{
gboolean retval;
retval = parse_arg (context, group, &group->entries[j],
NULL, option_name, error);
*parsed = TRUE;
g_free (option_name);
return retval;
}
else
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
_("Missing argument for %s"), option_name);
g_free (option_name);
return FALSE;
}
if (!parse_arg (context, group, &group->entries[j],
value, option_name, error))
{
g_free (option_name);
return FALSE;
}
g_free (option_name);
*parsed = TRUE;
}
}
}
return TRUE;
}
static gboolean
parse_remaining_arg (GOptionContext *context,
GOptionGroup *group,
gint *idx,
gint *argc,
gchar ***argv,
GError **error,
gboolean *parsed)
{
gsize j;
for (j = 0; j < group->n_entries; j++)
{
if (*idx >= *argc)
return TRUE;
if (group->entries[j].long_name[0])
continue;
g_return_val_if_fail (group->entries[j].arg == G_OPTION_ARG_CALLBACK ||
group->entries[j].arg == G_OPTION_ARG_STRING_ARRAY ||
group->entries[j].arg == G_OPTION_ARG_FILENAME_ARRAY, FALSE);
add_pending_null (context, &((*argv)[*idx]), NULL);
if (!parse_arg (context, group, &group->entries[j], (*argv)[*idx], "", error))
return FALSE;
*parsed = TRUE;
return TRUE;
}
return TRUE;
}
static void
free_changes_list (GOptionContext *context,
gboolean revert)
{
GList *list;
for (list = context->changes; list != NULL; list = list->next)
{
Change *change = list->data;
if (revert)
{
switch (change->arg_type)
{
case G_OPTION_ARG_NONE:
*(gboolean *)change->arg_data = change->prev.bool;
break;
case G_OPTION_ARG_INT:
*(gint *)change->arg_data = change->prev.integer;
break;
case G_OPTION_ARG_STRING:
case G_OPTION_ARG_FILENAME:
g_free (change->allocated.str);
*(gchar **)change->arg_data = change->prev.str;
break;
case G_OPTION_ARG_STRING_ARRAY:
case G_OPTION_ARG_FILENAME_ARRAY:
g_strfreev (change->allocated.array.data);
*(gchar ***)change->arg_data = change->prev.array;
break;
case G_OPTION_ARG_DOUBLE:
*(gdouble *)change->arg_data = change->prev.dbl;
break;
case G_OPTION_ARG_INT64:
*(gint64 *)change->arg_data = change->prev.int64;
break;
default:
g_assert_not_reached ();
}
}
g_free (change);
}
g_list_free (context->changes);
context->changes = NULL;
}
static void
free_pending_nulls (GOptionContext *context,
gboolean perform_nulls)
{
GList *list;
for (list = context->pending_nulls; list != NULL; list = list->next)
{
PendingNull *n = list->data;
if (perform_nulls)
{
if (n->value)
{
/* Copy back the short options */
*(n->ptr)[0] = '-';
strcpy (*n->ptr + 1, n->value);
}
else
{
if (context->strv_mode)
g_free (*n->ptr);
*n->ptr = NULL;
}
}
g_free (n->value);
g_free (n);
}
g_list_free (context->pending_nulls);
context->pending_nulls = NULL;
}
/* Use a platform-specific mechanism to look up the first argument to
* the current process.
* Note if you implement this for other platforms, also add it to
* tests/option-argv0.c
*/
static char *
platform_get_argv0 (void)
{
#ifdef HAVE_PROC_SELF_CMDLINE
char *cmdline;
char *base_arg0;
gsize len;
if (!g_file_get_contents ("/proc/self/cmdline",
&cmdline,
&len,
NULL))
return NULL;
/* g_file_get_contents() guarantees to put a NUL immediately after the
* file's contents (at cmdline[len] here), even if the file itself was
* not NUL-terminated. */
g_assert (memchr (cmdline, 0, len + 1));
/* We could just return cmdline, but I think it's better
* to hold on to a smaller malloc block; the arguments
* could be large.
*/
base_arg0 = g_path_get_basename (cmdline);
g_free (cmdline);
return base_arg0;
#elif defined __OpenBSD__
char **cmdline;
char *base_arg0;
gsize len;
int mib[] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
return NULL;
cmdline = g_malloc0 (len);
if (sysctl (mib, G_N_ELEMENTS (mib), cmdline, &len, NULL, 0) == -1)
{
g_free (cmdline);
return NULL;
}
/* We could just return cmdline, but I think it's better
* to hold on to a smaller malloc block; the arguments
* could be large.
*/
base_arg0 = g_path_get_basename (*cmdline);
g_free (cmdline);
return base_arg0;
#elif defined G_OS_WIN32
const wchar_t *cmdline;
wchar_t **wargv;
int wargc;
gchar *utf8_buf = NULL;
char *base_arg0 = NULL;
/* Pretend it's const, since we're not allowed to free it */
cmdline = (const wchar_t *) GetCommandLineW ();
if (G_UNLIKELY (cmdline == NULL))
return NULL;
/* Skip leading whitespace. CommandLineToArgvW() is documented
* to behave weirdly with that. The character codes below
* correspond to the *only* unicode characters that are
* considered to be spaces by CommandLineToArgvW(). The rest
* (such as 0xa0 - NO-BREAK SPACE) are treated as
* normal characters.
*/
while (cmdline[0] == 0x09 ||
cmdline[0] == 0x0a ||
cmdline[0] == 0x0c ||
cmdline[0] == 0x0d ||
cmdline[0] == 0x20)
cmdline++;
wargv = CommandLineToArgvW (cmdline, &wargc);
if (G_UNLIKELY (wargv == NULL))
return NULL;
if (wargc > 0)
utf8_buf = g_utf16_to_utf8 (wargv[0], -1, NULL, NULL, NULL);
LocalFree (wargv);
if (G_UNLIKELY (utf8_buf == NULL))
return NULL;
/* We could just return cmdline, but I think it's better
* to hold on to a smaller malloc block; the arguments
* could be large.
*/
base_arg0 = g_path_get_basename (utf8_buf);
g_free (utf8_buf);
return base_arg0;
#endif
return NULL;
}
/**
* g_option_context_parse:
* @context: a #GOptionContext
* @argc: (inout) (optional): a pointer to the number of command line arguments
* @argv: (inout) (array length=argc) (optional): a pointer to the array of command line arguments
* @error: a return location for errors
*
* Parses the command line arguments, recognizing options
* which have been added to @context. A side-effect of
* calling this function is that g_set_prgname() will be
* called.
*
* If the parsing is successful, any parsed arguments are
* removed from the array and @argc and @argv are updated
* accordingly. A '--' option is stripped from @argv
* unless there are unparsed options before and after it,
* or some of the options after it start with '-'. In case
* of an error, @argc and @argv are left unmodified.
*
* If automatic `--help` support is enabled
* (see g_option_context_set_help_enabled()), and the
* @argv array contains one of the recognized help options,
* this function will produce help output to stdout and
* call `exit (0)`.
*
* Note that function depends on the [current locale][setlocale] for
* automatic character set conversion of string and filename
* arguments.
*
* Returns: %TRUE if the parsing was successful,
* %FALSE if an error occurred
*
* Since: 2.6
**/
gboolean
g_option_context_parse (GOptionContext *context,
gint *argc,
gchar ***argv,
GError **error)
{
gint i, j, k;
GList *list;
g_return_val_if_fail (context != NULL, FALSE);
/* Set program name */
if (!g_get_prgname())
{
gchar *prgname;
if (argc && argv && *argc)
prgname = g_path_get_basename ((*argv)[0]);
else
prgname = platform_get_argv0 ();
if (prgname)
g_set_prgname (prgname);
else
g_set_prgname ("<unknown>");
g_free (prgname);
}
/* Call pre-parse hooks */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (group->pre_parse_func)
{
if (!(* group->pre_parse_func) (context, group,
group->user_data, error))
goto fail;
}
list = list->next;
}
if (context->main_group && context->main_group->pre_parse_func)
{
if (!(* context->main_group->pre_parse_func) (context, context->main_group,
context->main_group->user_data, error))
goto fail;
}
if (argc && argv)
{
gboolean stop_parsing = FALSE;
gboolean has_unknown = FALSE;
gint separator_pos = 0;
for (i = 1; i < *argc; i++)
{
gchar *arg, *dash;
gboolean parsed = FALSE;
if ((*argv)[i][0] == '-' && (*argv)[i][1] != '\0' && !stop_parsing)
{
if ((*argv)[i][1] == '-')
{
/* -- option */
arg = (*argv)[i] + 2;
/* '--' terminates list of arguments */
if (*arg == 0)
{
separator_pos = i;
stop_parsing = TRUE;
continue;
}
/* Handle help options */
if (context->help_enabled)
{
if (strcmp (arg, "help") == 0)
print_help (context, TRUE, NULL);
else if (strcmp (arg, "help-all") == 0)
print_help (context, FALSE, NULL);
else if (strncmp (arg, "help-", 5) == 0)
{
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (strcmp (arg + 5, group->name) == 0)
print_help (context, FALSE, group);
list = list->next;
}
}
}
if (context->main_group &&
!parse_long_option (context, context->main_group, &i, arg,
FALSE, argc, argv, error, &parsed))
goto fail;
if (parsed)
continue;
/* Try the groups */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (!parse_long_option (context, group, &i, arg,
FALSE, argc, argv, error, &parsed))
goto fail;
if (parsed)
break;
list = list->next;
}
if (parsed)
continue;
/* Now look for --<group>-<option> */
dash = strchr (arg, '-');
if (dash && arg < dash)
{
/* Try the groups */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (strncmp (group->name, arg, dash - arg) == 0)
{
if (!parse_long_option (context, group, &i, dash + 1,
TRUE, argc, argv, error, &parsed))
goto fail;
if (parsed)
break;
}
list = list->next;
}
}
if (context->ignore_unknown)
continue;
}
else
{ /* short option */
gint new_i = i, arg_length;
gboolean *nulled_out = NULL;
gboolean has_h_entry = context_has_h_entry (context);
arg = (*argv)[i] + 1;
arg_length = strlen (arg);
nulled_out = g_newa (gboolean, arg_length);
memset (nulled_out, 0, arg_length * sizeof (gboolean));
for (j = 0; j < arg_length; j++)
{
if (context->help_enabled && (arg[j] == '?' ||
(arg[j] == 'h' && !has_h_entry)))
print_help (context, TRUE, NULL);
parsed = FALSE;
if (context->main_group &&
!parse_short_option (context, context->main_group,
i, &new_i, arg[j],
argc, argv, error, &parsed))
goto fail;
if (!parsed)
{
/* Try the groups */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (!parse_short_option (context, group, i, &new_i, arg[j],
argc, argv, error, &parsed))
goto fail;
if (parsed)
break;
list = list->next;
}
}
if (context->ignore_unknown && parsed)
nulled_out[j] = TRUE;
else if (context->ignore_unknown)
continue;
else if (!parsed)
break;
/* !context->ignore_unknown && parsed */
}
if (context->ignore_unknown)
{
gchar *new_arg = NULL;
gint arg_index = 0;
for (j = 0; j < arg_length; j++)
{
if (!nulled_out[j])
{
if (!new_arg)
new_arg = g_malloc (arg_length + 1);
new_arg[arg_index++] = arg[j];
}
}
if (new_arg)
new_arg[arg_index] = '\0';
add_pending_null (context, &((*argv)[i]), new_arg);
i = new_i;
}
else if (parsed)
{
add_pending_null (context, &((*argv)[i]), NULL);
i = new_i;
}
}
if (!parsed)
has_unknown = TRUE;
if (!parsed && !context->ignore_unknown)
{
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
_("Unknown option %s"), (*argv)[i]);
goto fail;
}
}
else
{
if (context->strict_posix)
stop_parsing = TRUE;
/* Collect remaining args */
if (context->main_group &&
!parse_remaining_arg (context, context->main_group, &i,
argc, argv, error, &parsed))
goto fail;
if (!parsed && (has_unknown || (*argv)[i][0] == '-'))
separator_pos = 0;
}
}
if (separator_pos > 0)
add_pending_null (context, &((*argv)[separator_pos]), NULL);
}
/* Call post-parse hooks */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (group->post_parse_func)
{
if (!(* group->post_parse_func) (context, group,
group->user_data, error))
goto fail;
}
list = list->next;
}
if (context->main_group && context->main_group->post_parse_func)
{
if (!(* context->main_group->post_parse_func) (context, context->main_group,
context->main_group->user_data, error))
goto fail;
}
if (argc && argv)
{
free_pending_nulls (context, TRUE);
for (i = 1; i < *argc; i++)
{
for (k = i; k < *argc; k++)
if ((*argv)[k] != NULL)
break;
if (k > i)
{
k -= i;
for (j = i + k; j < *argc; j++)
{
(*argv)[j-k] = (*argv)[j];
(*argv)[j] = NULL;
}
*argc -= k;
}
}
}
return TRUE;
fail:
/* Call error hooks */
list = context->groups;
while (list)
{
GOptionGroup *group = list->data;
if (group->error_func)
(* group->error_func) (context, group,
group->user_data, error);
list = list->next;
}
if (context->main_group && context->main_group->error_func)
(* context->main_group->error_func) (context, context->main_group,
context->main_group->user_data, error);
free_changes_list (context, TRUE);
free_pending_nulls (context, FALSE);
return FALSE;
}
/**
* g_option_group_new:
* @name: the name for the option group, this is used to provide
* help for the options in this group with `--help-`@name
* @description: a description for this group to be shown in
* `--help`. This string is translated using the translation
* domain or translation function of the group
* @help_description: a description for the `--help-`@name option.
* This string is translated using the translation domain or translation function
* of the group
* @user_data: (nullable): user data that will be passed to the pre- and post-parse hooks,
* the error hook and to callbacks of %G_OPTION_ARG_CALLBACK options, or %NULL
* @destroy: (nullable): a function that will be called to free @user_data, or %NULL
*
* Creates a new #GOptionGroup.
*
* Returns: a newly created option group. It should be added
* to a #GOptionContext or freed with g_option_group_unref().
*
* Since: 2.6
**/
GOptionGroup *
g_option_group_new (const gchar *name,
const gchar *description,
const gchar *help_description,
gpointer user_data,
GDestroyNotify destroy)
{
GOptionGroup *group;
group = g_new0 (GOptionGroup, 1);
group->ref_count = 1;
group->name = g_strdup (name);
group->description = g_strdup (description);
group->help_description = g_strdup (help_description);
group->user_data = user_data;
group->destroy_notify = destroy;
return group;
}
/**
* g_option_group_free:
* @group: a #GOptionGroup
*
* Frees a #GOptionGroup. Note that you must not free groups
* which have been added to a #GOptionContext.
*
* Since: 2.6
*
* Deprecated: 2.44: Use g_option_group_unref() instead.
*/
void
g_option_group_free (GOptionGroup *group)
{
g_option_group_unref (group);
}
/**
* g_option_group_ref:
* @group: a #GOptionGroup
*
* Increments the reference count of @group by one.
*
* Returns: a #GOptionGroup
*
* Since: 2.44
*/
GOptionGroup *
g_option_group_ref (GOptionGroup *group)
{
g_return_val_if_fail (group != NULL, NULL);
group->ref_count++;
return group;
}
/**
* g_option_group_unref:
* @group: a #GOptionGroup
*
* Decrements the reference count of @group by one.
* If the reference count drops to 0, the @group will be freed.
* and all memory allocated by the @group is released.
*
* Since: 2.44
*/
void
g_option_group_unref (GOptionGroup *group)
{
g_return_if_fail (group != NULL);
if (--group->ref_count == 0)
{
g_free (group->name);
g_free (group->description);
g_free (group->help_description);
g_free (group->entries);
if (group->destroy_notify)
(* group->destroy_notify) (group->user_data);
if (group->translate_notify)
(* group->translate_notify) (group->translate_data);
g_free (group);
}
}
/**
* g_option_group_add_entries:
* @group: a #GOptionGroup
* @entries: (array zero-terminated=1): a %NULL-terminated array of #GOptionEntrys
*
* Adds the options specified in @entries to @group.
*
* Since: 2.6
**/
void
g_option_group_add_entries (GOptionGroup *group,
const GOptionEntry *entries)
{
gsize i, n_entries;
g_return_if_fail (group != NULL);
g_return_if_fail (entries != NULL);
for (n_entries = 0; entries[n_entries].long_name != NULL; n_entries++) ;
group->entries = g_renew (GOptionEntry, group->entries, group->n_entries + n_entries);
/* group->entries could be NULL in the trivial case where we add no
* entries to no entries */
if (n_entries != 0)
memcpy (group->entries + group->n_entries, entries, sizeof (GOptionEntry) * n_entries);
for (i = group->n_entries; i < group->n_entries + n_entries; i++)
{
gchar c = group->entries[i].short_name;
if (c == '-' || (c != 0 && !g_ascii_isprint (c)))
{
g_warning (G_STRLOC ": ignoring invalid short option '%c' (%d) in entry %s:%s",
c, c, group->name, group->entries[i].long_name);
group->entries[i].short_name = '\0';
}
if (group->entries[i].arg != G_OPTION_ARG_NONE &&
(group->entries[i].flags & G_OPTION_FLAG_REVERSE) != 0)
{
g_warning (G_STRLOC ": ignoring reverse flag on option of arg-type %d in entry %s:%s",
group->entries[i].arg, group->name, group->entries[i].long_name);
group->entries[i].flags &= ~G_OPTION_FLAG_REVERSE;
}
if (group->entries[i].arg != G_OPTION_ARG_CALLBACK &&
(group->entries[i].flags & (G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG|G_OPTION_FLAG_FILENAME)) != 0)
{
g_warning (G_STRLOC ": ignoring no-arg, optional-arg or filename flags (%d) on option of arg-type %d in entry %s:%s",
group->entries[i].flags, group->entries[i].arg, group->name, group->entries[i].long_name);
group->entries[i].flags &= ~(G_OPTION_FLAG_NO_ARG|G_OPTION_FLAG_OPTIONAL_ARG|G_OPTION_FLAG_FILENAME);
}
}
group->n_entries += n_entries;
}
/**
* g_option_group_set_parse_hooks:
* @group: a #GOptionGroup
* @pre_parse_func: (nullable): a function to call before parsing, or %NULL
* @post_parse_func: (nullable): a function to call after parsing, or %NULL
*
* Associates two functions with @group which will be called
* from g_option_context_parse() before the first option is parsed
* and after the last option has been parsed, respectively.
*
* Note that the user data to be passed to @pre_parse_func and
* @post_parse_func can be specified when constructing the group
* with g_option_group_new().
*
* Since: 2.6
**/
void
g_option_group_set_parse_hooks (GOptionGroup *group,
GOptionParseFunc pre_parse_func,
GOptionParseFunc post_parse_func)
{
g_return_if_fail (group != NULL);
group->pre_parse_func = pre_parse_func;
group->post_parse_func = post_parse_func;
}
/**
* g_option_group_set_error_hook:
* @group: a #GOptionGroup
* @error_func: a function to call when an error occurs
*
* Associates a function with @group which will be called
* from g_option_context_parse() when an error occurs.
*
* Note that the user data to be passed to @error_func can be
* specified when constructing the group with g_option_group_new().
*
* Since: 2.6
**/
void
g_option_group_set_error_hook (GOptionGroup *group,
GOptionErrorFunc error_func)
{
g_return_if_fail (group != NULL);
group->error_func = error_func;
}
/**
* g_option_group_set_translate_func:
* @group: a #GOptionGroup
* @func: (nullable): the #GTranslateFunc, or %NULL
* @data: (nullable): user data to pass to @func, or %NULL
* @destroy_notify: (nullable): a function which gets called to free @data, or %NULL
*
* Sets the function which is used to translate user-visible strings,
* for `--help` output. Different groups can use different
* #GTranslateFuncs. If @func is %NULL, strings are not translated.
*
* If you are using gettext(), you only need to set the translation
* domain, see g_option_group_set_translation_domain().
*
* Since: 2.6
**/
void
g_option_group_set_translate_func (GOptionGroup *group,
GTranslateFunc func,
gpointer data,
GDestroyNotify destroy_notify)
{
g_return_if_fail (group != NULL);
if (group->translate_notify)
group->translate_notify (group->translate_data);
group->translate_func = func;
group->translate_data = data;
group->translate_notify = destroy_notify;
}
static const gchar *
dgettext_swapped (const gchar *msgid,
const gchar *domainname)
{
return g_dgettext (domainname, msgid);
}
/**
* g_option_group_set_translation_domain:
* @group: a #GOptionGroup
* @domain: the domain to use
*
* A convenience function to use gettext() for translating
* user-visible strings.
*
* Since: 2.6
**/
void
g_option_group_set_translation_domain (GOptionGroup *group,
const gchar *domain)
{
g_return_if_fail (group != NULL);
g_option_group_set_translate_func (group,
(GTranslateFunc)dgettext_swapped,
g_strdup (domain),
g_free);
}
/**
* g_option_context_set_translate_func:
* @context: a #GOptionContext
* @func: (nullable): the #GTranslateFunc, or %NULL
* @data: (nullable): user data to pass to @func, or %NULL
* @destroy_notify: (nullable): a function which gets called to free @data, or %NULL
*
* Sets the function which is used to translate the contexts
* user-visible strings, for `--help` output. If @func is %NULL,
* strings are not translated.
*
* Note that option groups have their own translation functions,
* this function only affects the @parameter_string (see g_option_context_new()),
* the summary (see g_option_context_set_summary()) and the description
* (see g_option_context_set_description()).
*
* If you are using gettext(), you only need to set the translation
* domain, see g_option_context_set_translation_domain().
*
* Since: 2.12
**/
void
g_option_context_set_translate_func (GOptionContext *context,
GTranslateFunc func,
gpointer data,
GDestroyNotify destroy_notify)
{
g_return_if_fail (context != NULL);
if (context->translate_notify)
context->translate_notify (context->translate_data);
context->translate_func = func;
context->translate_data = data;
context->translate_notify = destroy_notify;
}
/**
* g_option_context_set_translation_domain:
* @context: a #GOptionContext
* @domain: the domain to use
*
* A convenience function to use gettext() for translating
* user-visible strings.
*
* Since: 2.12
**/
void
g_option_context_set_translation_domain (GOptionContext *context,
const gchar *domain)
{
g_return_if_fail (context != NULL);
g_option_context_set_translate_func (context,
(GTranslateFunc)dgettext_swapped,
g_strdup (domain),
g_free);
}
/**
* g_option_context_set_summary:
* @context: a #GOptionContext
* @summary: (nullable): a string to be shown in `--help` output
* before the list of options, or %NULL
*
* Adds a string to be displayed in `--help` output before the list
* of options. This is typically a summary of the program functionality.
*
* Note that the summary is translated (see
* g_option_context_set_translate_func() and
* g_option_context_set_translation_domain()).
*
* Since: 2.12
*/
void
g_option_context_set_summary (GOptionContext *context,
const gchar *summary)
{
g_return_if_fail (context != NULL);
g_free (context->summary);
context->summary = g_strdup (summary);
}
/**
* g_option_context_get_summary:
* @context: a #GOptionContext
*
* Returns the summary. See g_option_context_set_summary().
*
* Returns: the summary
*
* Since: 2.12
*/
const gchar *
g_option_context_get_summary (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, NULL);
return context->summary;
}
/**
* g_option_context_set_description:
* @context: a #GOptionContext
* @description: (nullable): a string to be shown in `--help` output
* after the list of options, or %NULL
*
* Adds a string to be displayed in `--help` output after the list
* of options. This text often includes a bug reporting address.
*
* Note that the summary is translated (see
* g_option_context_set_translate_func()).
*
* Since: 2.12
*/
void
g_option_context_set_description (GOptionContext *context,
const gchar *description)
{
g_return_if_fail (context != NULL);
g_free (context->description);
context->description = g_strdup (description);
}
/**
* g_option_context_get_description:
* @context: a #GOptionContext
*
* Returns the description. See g_option_context_set_description().
*
* Returns: the description
*
* Since: 2.12
*/
const gchar *
g_option_context_get_description (GOptionContext *context)
{
g_return_val_if_fail (context != NULL, NULL);
return context->description;
}
/**
* g_option_context_parse_strv:
* @context: a #GOptionContext
* @arguments: (inout) (array null-terminated=1) (optional): a pointer
* to the command line arguments (which must be in UTF-8 on Windows).
* Starting with GLib 2.62, @arguments can be %NULL, which matches
* g_option_context_parse().
* @error: a return location for errors
*
* Parses the command line arguments.
*
* This function is similar to g_option_context_parse() except that it
* respects the normal memory rules when dealing with a strv instead of
* assuming that the passed-in array is the argv of the main function.
*
* In particular, strings that are removed from the arguments list will
* be freed using g_free().
*
* On Windows, the strings are expected to be in UTF-8. This is in
* contrast to g_option_context_parse() which expects them to be in the
* system codepage, which is how they are passed as @argv to main().
* See g_win32_get_command_line() for a solution.
*
* This function is useful if you are trying to use #GOptionContext with
* #GApplication.
*
* Returns: %TRUE if the parsing was successful,
* %FALSE if an error occurred
*
* Since: 2.40
**/
gboolean
g_option_context_parse_strv (GOptionContext *context,
gchar ***arguments,
GError **error)
{
gboolean success;
gint argc;
g_return_val_if_fail (context != NULL, FALSE);
context->strv_mode = TRUE;
argc = arguments && *arguments ? g_strv_length (*arguments) : 0;
success = g_option_context_parse (context, &argc, arguments, error);
context->strv_mode = FALSE;
return success;
}
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