diffutils-3.5HEADdiffutils-3.5master

1 files changed, 111 insertions, 0 deletions

diff --git a/lib/argmatch.h b/lib/argmatch.h
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+/* argmatch.h -- definitions and prototypes for argmatch.c
+
+   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2016 Free Software
+   Foundation, Inc.
+
+   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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@ai.mit.edu>
+   Modified by Akim Demaille <demaille@inf.enst.fr> */
+
+#ifndef ARGMATCH_H_
+# define ARGMATCH_H_ 1
+
+# include <stddef.h>
+
+# include "verify.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+
+/* Assert there are as many real arguments as there are values
+   (argument list ends with a NULL guard).  */
+
+# define ARGMATCH_VERIFY(Arglist, Vallist) \
+    verify (ARRAY_CARDINALITY (Arglist) == ARRAY_CARDINALITY (Vallist) + 1)
+
+/* Return the index of the element of ARGLIST (NULL terminated) that
+   matches with ARG.  If VALLIST is not NULL, then use it to resolve
+   false ambiguities (i.e., different matches of ARG but corresponding
+   to the same values in VALLIST).  */
+
+ptrdiff_t argmatch (char const *arg, char const *const *arglist,
+                    char const *vallist, size_t valsize) _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH(Arg, Arglist, Vallist) \
+  argmatch (Arg, Arglist, (char const *) (Vallist), sizeof *(Vallist))
+
+/* xargmatch calls this function when it fails.  This function should not
+   return.  By default, this is a function that calls ARGMATCH_DIE which
+   in turn defaults to 'exit (exit_failure)'.  */
+typedef void (*argmatch_exit_fn) (void);
+extern argmatch_exit_fn argmatch_die;
+
+/* Report on stderr why argmatch failed.  Report correct values. */
+
+void argmatch_invalid (char const *context, char const *value,
+                       ptrdiff_t problem);
+
+/* Left for compatibility with the old name invalid_arg */
+
+# define invalid_arg(Context, Value, Problem) \
+  argmatch_invalid (Context, Value, Problem)
+
+
+
+/* Report on stderr the list of possible arguments.  */
+
+void argmatch_valid (char const *const *arglist,
+                     char const *vallist, size_t valsize);
+
+# define ARGMATCH_VALID(Arglist, Vallist) \
+  argmatch_valid (Arglist, (char const *) (Vallist), sizeof *(Vallist))
+
+
+
+/* Same as argmatch, but upon failure, report an explanation of the
+   failure, and exit using the function EXIT_FN. */
+
+ptrdiff_t __xargmatch_internal (char const *context,
+                                char const *arg, char const *const *arglist,
+                                char const *vallist, size_t valsize,
+                                argmatch_exit_fn exit_fn);
+
+/* Programmer friendly interface to __xargmatch_internal. */
+
+# define XARGMATCH(Context, Arg, Arglist, Vallist)              \
+  ((Vallist) [__xargmatch_internal (Context, Arg, Arglist,      \
+                                    (char const *) (Vallist),   \
+                                    sizeof *(Vallist),          \
+                                    argmatch_die)])
+
+/* Convert a value into a corresponding argument. */
+
+char const *argmatch_to_argument (char const *value,
+                                  char const *const *arglist,
+                                  char const *vallist, size_t valsize)
+  _GL_ATTRIBUTE_PURE;
+
+# define ARGMATCH_TO_ARGUMENT(Value, Arglist, Vallist)                  \
+  argmatch_to_argument (Value, Arglist,                                 \
+                        (char const *) (Vallist), sizeof *(Vallist))
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* ARGMATCH_H_ */