LookingGlass/common/include/common/option.h

84 lines
2.4 KiB
C

/*
KVMGFX Client - A KVM Client for VGA Passthrough
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdbool.h>
#include "common/stringlist.h"
enum OptionType
{
OPTION_TYPE_NONE = 0,
OPTION_TYPE_INT,
OPTION_TYPE_STRING,
OPTION_TYPE_BOOL,
OPTION_TYPE_CUSTOM
};
struct Option;
struct Option
{
char * module;
char * name;
char * description;
const char shortopt;
enum OptionType type;
union
{
int x_int;
char * x_string;
bool x_bool;
void * x_custom;
}
value;
bool (*parser )(struct Option * opt, const char * str);
bool (*validator)(struct Option * opt, const char ** error);
char * (*toString )(struct Option * opt);
StringList (*getValues)(struct Option * opt);
void (*printHelp)();
// internal use only
bool failed_set;
};
// register an NULL terminated array of options
bool option_register(struct Option options[]);
// lookup the value of an option
struct Option * option_get (const char * module, const char * name);
int option_get_int (const char * module, const char * name);
const char * option_get_string(const char * module, const char * name);
bool option_get_bool (const char * module, const char * name);
// called by the main application to parse the command line arguments
bool option_parse(int argc, char * argv[]);
// called by the main application to load configuration from a file
bool option_load(const char * filename);
// called by the main application to validate the option values
bool option_validate();
// print out the options, help, and their current values
void option_print();
// final cleanup
void option_free();