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Edit File: goption.h

/* goption.h - Option parser * * 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/>. */ #ifndef __G_OPTION_H__ #define __G_OPTION_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif #include <glib/gerror.h> #include <glib/gquark.h> G_BEGIN_DECLS /** * GOptionContext: * * A `GOptionContext` struct defines which options * are accepted by the commandline option parser. The struct has only private * fields and should not be directly accessed. */ typedef struct _GOptionContext GOptionContext; /** * GOptionGroup: * * A `GOptionGroup` struct defines the options in a single * group. The struct has only private fields and should not be directly accessed. * * All options in a group share the same translation function. Libraries which * need to parse commandline options are expected to provide a function for * getting a `GOptionGroup` holding their options, which * the application can then add to its #GOptionContext. */ typedef struct _GOptionGroup GOptionGroup; typedef struct _GOptionEntry GOptionEntry; /** * GOptionFlags: * @G_OPTION_FLAG_NONE: No flags. Since: 2.42. * @G_OPTION_FLAG_HIDDEN: The option doesn't appear in `--help` output. * @G_OPTION_FLAG_IN_MAIN: The option appears in the main section of the * `--help` output, even if it is defined in a group. * @G_OPTION_FLAG_REVERSE: For options of the %G_OPTION_ARG_NONE kind, this * flag indicates that the sense of the option is reversed. * @G_OPTION_FLAG_NO_ARG: For options of the %G_OPTION_ARG_CALLBACK kind, * this flag indicates that the callback does not take any argument * (like a %G_OPTION_ARG_NONE option). Since 2.8 * @G_OPTION_FLAG_FILENAME: For options of the %G_OPTION_ARG_CALLBACK * kind, this flag indicates that the argument should be passed to the * callback in the GLib filename encoding rather than UTF-8. Since 2.8 * @G_OPTION_FLAG_OPTIONAL_ARG: For options of the %G_OPTION_ARG_CALLBACK * kind, this flag indicates that the argument supply is optional. * If no argument is given then data of %GOptionParseFunc will be * set to NULL. Since 2.8 * @G_OPTION_FLAG_NOALIAS: This flag turns off the automatic conflict * resolution which prefixes long option names with `groupname-` if * there is a conflict. This option should only be used in situations * where aliasing is necessary to model some legacy commandline interface. * It is not safe to use this option, unless all option groups are under * your direct control. Since 2.8. * * Flags which modify individual options. */ typedef enum { G_OPTION_FLAG_NONE = 0, G_OPTION_FLAG_HIDDEN = 1 << 0, G_OPTION_FLAG_IN_MAIN = 1 << 1, G_OPTION_FLAG_REVERSE = 1 << 2, G_OPTION_FLAG_NO_ARG = 1 << 3, G_OPTION_FLAG_FILENAME = 1 << 4, G_OPTION_FLAG_OPTIONAL_ARG = 1 << 5, G_OPTION_FLAG_NOALIAS = 1 << 6 } GOptionFlags; /** * GOptionArg: * @G_OPTION_ARG_NONE: No extra argument. This is useful for simple flags. * @G_OPTION_ARG_STRING: The option takes a UTF-8 string argument. * @G_OPTION_ARG_INT: The option takes an integer argument. * @G_OPTION_ARG_CALLBACK: The option provides a callback (of type * #GOptionArgFunc) to parse the extra argument. * @G_OPTION_ARG_FILENAME: The option takes a filename as argument, which will be in the GLib filename encoding rather than UTF-8. * @G_OPTION_ARG_STRING_ARRAY: The option takes a string argument, multiple * uses of the option are collected into an array of strings. * @G_OPTION_ARG_FILENAME_ARRAY: The option takes a filename as argument, * multiple uses of the option are collected into an array of strings. * @G_OPTION_ARG_DOUBLE: The option takes a double argument. The argument * can be formatted either for the user's locale or for the "C" locale. * Since 2.12 * @G_OPTION_ARG_INT64: The option takes a 64-bit integer. Like * %G_OPTION_ARG_INT but for larger numbers. The number can be in * decimal base, or in hexadecimal (when prefixed with `0x`, for * example, `0xffffffff`). Since 2.12 * * The #GOptionArg enum values determine which type of extra argument the * options expect to find. If an option expects an extra argument, it can * be specified in several ways; with a short option: `-x arg`, with a long * option: `--name arg` or combined in a single argument: `--name=arg`. */ typedef enum { G_OPTION_ARG_NONE, G_OPTION_ARG_STRING, G_OPTION_ARG_INT, G_OPTION_ARG_CALLBACK, G_OPTION_ARG_FILENAME, G_OPTION_ARG_STRING_ARRAY, G_OPTION_ARG_FILENAME_ARRAY, G_OPTION_ARG_DOUBLE, G_OPTION_ARG_INT64 } GOptionArg; /** * GOptionArgFunc: * @option_name: The name of the option being parsed. This will be either a * single dash followed by a single letter (for a short name) or two dashes * followed by a long option name. * @value: The value to be parsed. * @data: User data added to the #GOptionGroup containing the option when it * was created with g_option_group_new() * @error: A return location for errors. The error code %G_OPTION_ERROR_FAILED * is intended to be used for errors in #GOptionArgFunc callbacks. * * The type of function to be passed as callback for %G_OPTION_ARG_CALLBACK * options. * * Returns: %TRUE if the option was successfully parsed, %FALSE if an error * occurred, in which case @error should be set with g_set_error() */ typedef gboolean (*GOptionArgFunc) (const gchar *option_name, const gchar *value, gpointer data, GError **error); /** * GOptionParseFunc: * @context: The active #GOptionContext * @group: The group to which the function belongs * @data: User data added to the #GOptionGroup containing the option when it * was created with g_option_group_new() * @error: A return location for error details * * The type of function that can be called before and after parsing. * * Returns: %TRUE if the function completed successfully, %FALSE if an error * occurred, in which case @error should be set with g_set_error() */ typedef gboolean (*GOptionParseFunc) (GOptionContext *context, GOptionGroup *group, gpointer data, GError **error); /** * GOptionErrorFunc: * @context: The active #GOptionContext * @group: The group to which the function belongs * @data: User data added to the #GOptionGroup containing the option when it * was created with g_option_group_new() * @error: The #GError containing details about the parse error * * The type of function to be used as callback when a parse error occurs. */ typedef void (*GOptionErrorFunc) (GOptionContext *context, GOptionGroup *group, gpointer data, GError **error); /** * G_OPTION_ERROR: * * Error domain for option parsing. Errors in this domain will * be from the #GOptionError enumeration. See #GError for information on * error domains. */ #define G_OPTION_ERROR (g_option_error_quark ()) /** * GOptionError: * @G_OPTION_ERROR_UNKNOWN_OPTION: An option was not known to the parser. * This error will only be reported, if the parser hasn't been instructed * to ignore unknown options, see g_option_context_set_ignore_unknown_options(). * @G_OPTION_ERROR_BAD_VALUE: A value couldn't be parsed. * @G_OPTION_ERROR_FAILED: A #GOptionArgFunc callback failed. * * Error codes returned by option parsing. */ typedef enum { G_OPTION_ERROR_UNKNOWN_OPTION, G_OPTION_ERROR_BAD_VALUE, G_OPTION_ERROR_FAILED } GOptionError; GLIB_AVAILABLE_IN_ALL GQuark g_option_error_quark (void); /** * GOptionEntry: * @long_name: The long name of an option can be used to specify it * in a commandline as `--long_name`. Every option must have a * long name. To resolve conflicts if multiple option groups contain * the same long name, it is also possible to specify the option as * `--groupname-long_name`. * @short_name: If an option has a short name, it can be specified * `-short_name` in a commandline. @short_name must be a printable * ASCII character different from '-', or zero if the option has no * short name. * @flags: Flags from #GOptionFlags * @arg: The type of the option, as a #GOptionArg * @arg_data: If the @arg type is %G_OPTION_ARG_CALLBACK, then @arg_data * must point to a #GOptionArgFunc callback function, which will be * called to handle the extra argument. Otherwise, @arg_data is a * pointer to a location to store the value, the required type of * the location depends on the @arg type: * - %G_OPTION_ARG_NONE: %gboolean * - %G_OPTION_ARG_STRING: %gchar* * - %G_OPTION_ARG_INT: %gint * - %G_OPTION_ARG_FILENAME: %gchar* * - %G_OPTION_ARG_STRING_ARRAY: %gchar** * - %G_OPTION_ARG_FILENAME_ARRAY: %gchar** * - %G_OPTION_ARG_DOUBLE: %gdouble * If @arg type is %G_OPTION_ARG_STRING or %G_OPTION_ARG_FILENAME, * the location will contain a newly allocated string if the option * was given. That string needs to be freed by the callee using g_free(). * Likewise if @arg type is %G_OPTION_ARG_STRING_ARRAY or * %G_OPTION_ARG_FILENAME_ARRAY, the data should be freed using g_strfreev(). * @description: the description for the option in `--help` * output. The @description is translated using the @translate_func * of the group, see g_option_group_set_translation_domain(). * @arg_description: The placeholder to use for the extra argument parsed * by the option in `--help` output. The @arg_description is translated * using the @translate_func of the group, see * g_option_group_set_translation_domain(). * * A GOptionEntry struct defines a single option. To have an effect, they * must be added to a #GOptionGroup with g_option_context_add_main_entries() * or g_option_group_add_entries(). */ struct _GOptionEntry { const gchar *long_name; gchar short_name; gint flags; GOptionArg arg; gpointer arg_data; const gchar *description; const gchar *arg_description; }; /** * G_OPTION_REMAINING: * * If a long option in the main group has this name, it is not treated as a * regular option. Instead it collects all non-option arguments which would * otherwise be left in `argv`. The option must be of type * %G_OPTION_ARG_CALLBACK, %G_OPTION_ARG_STRING_ARRAY * or %G_OPTION_ARG_FILENAME_ARRAY. * * * Using %G_OPTION_REMAINING instead of simply scanning `argv` * for leftover arguments has the advantage that GOption takes care of * necessary encoding conversions for strings or filenames. * * Since: 2.6 */ #define G_OPTION_REMAINING "" /** * G_OPTION_ENTRY_NULL: * * A #GOptionEntry array requires a %NULL terminator, this macro can * be used as terminator instead of an explicit `{ 0 }` but it cannot * be assigned to a variable. * * |[ * GOptionEntry option[] = { G_OPTION_ENTRY_NULL }; * ]| * * Since: 2.70 */ #define G_OPTION_ENTRY_NULL \ GLIB_AVAILABLE_MACRO_IN_2_70 \ { NULL, 0, 0, 0, NULL, NULL, NULL } GLIB_AVAILABLE_IN_ALL GOptionContext *g_option_context_new (const gchar *parameter_string); GLIB_AVAILABLE_IN_ALL void g_option_context_set_summary (GOptionContext *context, const gchar *summary); GLIB_AVAILABLE_IN_ALL const gchar * g_option_context_get_summary (GOptionContext *context); GLIB_AVAILABLE_IN_ALL void g_option_context_set_description (GOptionContext *context, const gchar *description); GLIB_AVAILABLE_IN_ALL const gchar * g_option_context_get_description (GOptionContext *context); GLIB_AVAILABLE_IN_ALL void g_option_context_free (GOptionContext *context); GLIB_AVAILABLE_IN_ALL void g_option_context_set_help_enabled (GOptionContext *context, gboolean help_enabled); GLIB_AVAILABLE_IN_ALL gboolean g_option_context_get_help_enabled (GOptionContext *context); GLIB_AVAILABLE_IN_ALL void g_option_context_set_ignore_unknown_options (GOptionContext *context, gboolean ignore_unknown); GLIB_AVAILABLE_IN_ALL gboolean g_option_context_get_ignore_unknown_options (GOptionContext *context); GLIB_AVAILABLE_IN_2_44 void g_option_context_set_strict_posix (GOptionContext *context, gboolean strict_posix); GLIB_AVAILABLE_IN_2_44 gboolean g_option_context_get_strict_posix (GOptionContext *context); GLIB_AVAILABLE_IN_ALL void g_option_context_add_main_entries (GOptionContext *context, const GOptionEntry *entries, const gchar *translation_domain); GLIB_AVAILABLE_IN_ALL gboolean g_option_context_parse (GOptionContext *context, gint *argc, gchar ***argv, GError **error); GLIB_AVAILABLE_IN_2_40 gboolean g_option_context_parse_strv (GOptionContext *context, gchar ***arguments, GError **error); GLIB_AVAILABLE_IN_ALL void g_option_context_set_translate_func (GOptionContext *context, GTranslateFunc func, gpointer data, GDestroyNotify destroy_notify); GLIB_AVAILABLE_IN_ALL void g_option_context_set_translation_domain (GOptionContext *context, const gchar *domain); GLIB_AVAILABLE_IN_ALL void g_option_context_add_group (GOptionContext *context, GOptionGroup *group); GLIB_AVAILABLE_IN_ALL void g_option_context_set_main_group (GOptionContext *context, GOptionGroup *group); GLIB_AVAILABLE_IN_ALL GOptionGroup *g_option_context_get_main_group (GOptionContext *context); GLIB_AVAILABLE_IN_ALL gchar *g_option_context_get_help (GOptionContext *context, gboolean main_help, GOptionGroup *group); GLIB_AVAILABLE_IN_ALL GOptionGroup *g_option_group_new (const gchar *name, const gchar *description, const gchar *help_description, gpointer user_data, GDestroyNotify destroy); GLIB_AVAILABLE_IN_ALL void g_option_group_set_parse_hooks (GOptionGroup *group, GOptionParseFunc pre_parse_func, GOptionParseFunc post_parse_func); GLIB_AVAILABLE_IN_ALL void g_option_group_set_error_hook (GOptionGroup *group, GOptionErrorFunc error_func); GLIB_DEPRECATED_IN_2_44 void g_option_group_free (GOptionGroup *group); GLIB_AVAILABLE_IN_2_44 GOptionGroup *g_option_group_ref (GOptionGroup *group); GLIB_AVAILABLE_IN_2_44 void g_option_group_unref (GOptionGroup *group); GLIB_AVAILABLE_IN_ALL void g_option_group_add_entries (GOptionGroup *group, const GOptionEntry *entries); GLIB_AVAILABLE_IN_ALL void g_option_group_set_translate_func (GOptionGroup *group, GTranslateFunc func, gpointer data, GDestroyNotify destroy_notify); GLIB_AVAILABLE_IN_ALL void g_option_group_set_translation_domain (GOptionGroup *group, const gchar *domain); G_END_DECLS #endif /* __G_OPTION_H__ */