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Commit	Line	Data
	1	/* argmatch.h -- definitions and prototypes for argmatch.c
	2	Copyright (C) 1990, 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2, or (at your option)
	7	any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software Foundation,
	16	Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	17
	18	/* Written by David MacKenzie <djm@ai.mit.edu>
	19	Modified by Akim Demaille <demaille@inf.enst.fr> */
	20
	21	#ifndef ARGMATCH_H_
	22	# define ARGMATCH_H_ 1
	23
	24	# include <stddef.h>
	25
	26	# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
	27
	28	# define ARGMATCH_CONSTRAINT(Arglist, Vallist) \
	29	(ARRAY_CARDINALITY (Arglist) == ARRAY_CARDINALITY (Vallist) + 1)
	30
	31	/* Assert there are as many real arguments as there are values
	32	(argument list ends with a NULL guard). ARGMATCH_VERIFY is
	33	preferred, since it is guaranteed to be checked at compile-time.
	34	ARGMATCH_ASSERT is for backward compatibility only. */
	35
	36	# define ARGMATCH_VERIFY(Arglist, Vallist) \
	37	struct argmatch_verify \
	38	{ \
	39	char argmatch_verify[ARGMATCH_CONSTRAINT(Arglist, Vallist) ? 1 : -1]; \
	40	}
	41
	42	# define ARGMATCH_ASSERT(Arglist, Vallist) \
	43	assert (ARGMATCH_CONSTRAINT (Arglist, Vallist))
	44
	45	/* Return the index of the element of ARGLIST (NULL terminated) that
	46	matches with ARG. If VALLIST is not NULL, then use it to resolve
	47	false ambiguities (i.e., different matches of ARG but corresponding
	48	to the same values in VALLIST). */
	49
	50	int argmatch (char const arg, char const const *arglist,
	51	char const *vallist, size_t valsize);
	52
	53	# define ARGMATCH(Arg, Arglist, Vallist) \
	54	argmatch (Arg, Arglist, (char const ) (Vallist), sizeof (Vallist))
	55
	56	/* xargmatch calls this function when it fails. This function should not
	57	return. By default, this is a function that calls ARGMATCH_DIE which
	58	in turn defaults to `exit (EXIT_FAILURE)'. */
	59	typedef void (*argmatch_exit_fn) (void);
	60	extern argmatch_exit_fn argmatch_die;
	61
	62	/* Report on stderr why argmatch failed. Report correct values. */
	63
	64	void argmatch_invalid (char const context, char const value, int problem);
	65
	66	/* Left for compatibility with the old name invalid_arg */
	67
	68	# define invalid_arg(Context, Value, Problem) \
	69	argmatch_invalid (Context, Value, Problem)
	70
	71
	72
	73	/* Report on stderr the list of possible arguments. */
	74
	75	void argmatch_valid (char const const arglist,
	76	char const *vallist, size_t valsize);
	77
	78	# define ARGMATCH_VALID(Arglist, Vallist) \
	79	argmatch_valid (Arglist, (char const ) (Vallist), sizeof (Vallist))
	80
	81
	82
	83	/* Same as argmatch, but upon failure, reports a explanation on the
	84	failure, and exits using the function EXIT_FN. */
	85
	86	int __xargmatch_internal (char const *context,
	87	char const arg, char const const *arglist,
	88	char const *vallist, size_t valsize,
	89	argmatch_exit_fn exit_fn);
	90
	91	/* Programmer friendly interface to __xargmatch_internal. */
	92
	93	# define XARGMATCH(Context, Arg, Arglist, Vallist) \
	94	((Vallist) [__xargmatch_internal (Context, Arg, Arglist, \
	95	(char const *) (Vallist), \
	96	sizeof *(Vallist), \
	97	argmatch_die)])
	98
	99	/* Convert a value into a corresponding argument. */
	100
	101	char const argmatch_to_argument (char const value,
	102	char const const arglist,
	103	char const *vallist, size_t valsize);
	104
	105	# define ARGMATCH_TO_ARGUMENT(Value, Arglist, Vallist) \
	106	argmatch_to_argument (Value, Arglist, \
	107	(char const ) (Vallist), sizeof (Vallist))
	108
	109	#endif /* ARGMATCH_H_ */