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/*
 * libtu/optparser.h
 *
 * Copyright (c) Tuomo Valkonen 1999-2000.
 * 
 * This file is distributed under the terms of the "Artistic License".
 * See the included file LICENSE for details.
 */

#ifndef __LIBTU_OPTPARSER_H
#define __LIBTU_OPTPARSER_H

#include "types.h"


#define OPT_ID(X)			((X)|0x10000)
#define OPT_ID_RESERVED(X)	((X)|0x20000)

/* OPTP_CHAIN is the normal behavior, i.e. single-letter options can be
 *		"chained" together: 'lr -lR'. Use for normal command line programs.
 * OPTP_MIDLONG allows '-display foo' -like args but disables chaining
 * 		of single-letter options. X programs should probably use this.
 * OPTP_IMMEDIATE allows immediate arguments (-I/usr/include) (and disables
 *		chaining and midlong options).
 * OPTP_NO_DASH is the same as OPTP_CHAIN but allows the dash to be omitted
 * 		for 'tar xzf foo' -like behavior.
 * Long '--foo=bar' options are supported in all of the modes.
 */

enum{
	OPTP_CHAIN=0,
	OPTP_MIDLONG=1,
	OPTP_IMMEDIATE=2,
	OPTP_NO_DASH=3
};
	
enum{
	OPT_ARG=1,					/* option has an argument					*/
	OPT_OPT_ARG=3				/* option may have an argument				*/
};


typedef struct{
	int optid;
	const char *longopt;
	int	flags;
} OptParserOpt;


enum{
	OPT_ID_END=0,
	OPT_ID_ARGUMENT=1,

	E_OPT_INVALID_OPTION=-1,
	E_OPT_INVALID_CHAIN_OPTION=-2,
	E_OPT_SYNTAX_ERROR=-3,
	E_OPT_MISSING_ARGUMENT=-4,
	E_OPT_UNEXPECTED_ARGUMENT=-5
};


extern void optparser_init(int argc, char *const argv[], int mode,
						   const OptParserOpt *opts);
extern int  optparser_get_opt();
extern const char* optparser_get_arg();
extern void optparser_print_error();

#endif /* __LIBTU_OPTPARSER_H */