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