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7a61a94b95
glib/glib/goption.c
Simon McVittie e5ed410c8c Avoid calling Standard C string/array functions with NULL arguments 
glibc string.h declares memcpy() with attribute(nonnull(1,2)), causing
calls with NULL arguments to be treated as undefined behaviour.
This is consistent with ISO C99 and C11, which state that passing 0
to string functions as an array length does not remove the requirement
that the pointer to the array is a valid pointer.
gcc -fsanitize=undefined catches this while running OSTree's test suite.

Similarly, running the GLib test suite reports similar issues for
qsort(), memmove(), memcmp().

Signed-off-by: Simon McVittie <smcv@debian.org>
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=775510
Reviewed-by: Colin Walters
2016-12-02 19:10:39 +00:00

2703 lines
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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 Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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"
#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;
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;
gint 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);
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: 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 (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;
gint 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;
gint i;
GOptionEntry *entry;
GHashTable *shadow_map;
GHashTable *aliases;
gboolean seen[256];
const gchar *rest_description;
GString *string;
guchar token;
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)
{
gint 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)
{
gint 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)
{
gint 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)
{
#if defined __linux
char *cmdline;
char *base_arg0;
gsize len;
if (!g_file_get_contents ("/proc/self/cmdline",
&cmdline,
&len,
NULL))
return NULL;
/* Sanity check for a NUL terminator. */
if (!memchr (cmdline, 0, len))
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 __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;
#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;
/* 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)
{
/* 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: 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)
{
gint i, n_entries;
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): a pointer to the
* command line arguments (which must be in UTF-8 on Windows)
* @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;
context->strv_mode = TRUE;
argc = g_strv_length (*arguments);
success = g_option_context_parse (context, &argc, arguments, error);
context->strv_mode = FALSE;
return success;
}
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