/* argmatch.c -- find a match for a string in an array
- Copyright (C) 1990, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1998 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING.
- If not, write to the Free Software Foundation,
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-/* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
+/* Written by David MacKenzie <djm@ai.mit.edu>
+ Modified by Akim Demaille <demaille@inf.enst.fr> */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <argmatch.h>
-
-#include <sys/types.h>
+#include "argmatch.h"
#include <stdio.h>
-#if HAVE_STRING_H
+#ifdef STDC_HEADERS
# include <string.h>
+#endif
+
+#if HAVE_LOCALE_H
+# include <locale.h>
+#endif
+#if !HAVE_SETLOCALE
+# define setlocale(Category, Locale) /* empty */
+#endif
+
+#if ENABLE_NLS
+# include <libintl.h>
+# define _(Text) gettext (Text)
#else
-# include <strings.h>
+# define bindtextdomain(Domain, Directory) /* empty */
+# define textdomain(Domain) /* empty */
+# define _(Text) Text
+#endif
+
+#ifndef EXIT_BADARG
+# define EXIT_BADARG 1
+#endif
+
+#include "quotearg.h"
+
+/* When reporting a failing argument, make sure to show invisible
+ characters hidden using the quoting style
+ ARGMATCH_QUOTING_STYLE. literal_quoting_style is not good.*/
+
+#ifndef ARGMATCH_QUOTING_STYLE
+# define ARGMATCH_QUOTING_STYLE c_quoting_style
+#endif
+
+#if !HAVE_STRNCASECMP
+# include <ctype.h>
+/* Compare no more than N characters of S1 and S2,
+ ignoring case, returning less than, equal to or
+ greater than zero if S1 is lexicographically less
+ than, equal to or greater than S2. */
+int
+strncasecmp (const char *s1, const char *s2, size_t n)
+{
+ register const unsigned char *p1 = (const unsigned char *) s1;
+ register const unsigned char *p2 = (const unsigned char *) s2;
+ unsigned char c1, c2;
+
+ if (p1 == p2 || n == 0)
+ return 0;
+
+ do
+ {
+ c1 = tolower (*p1++);
+ c2 = tolower (*p2++);
+ if (c1 == '\0' || c1 != c2)
+ return c1 - c2;
+ } while (--n > 0);
+
+ return c1 - c2;
+}
#endif
+extern char *program_name;
+
/* If ARG is an unambiguous match for an element of the
- null-terminated array OPTLIST, return the index in OPTLIST
+ null-terminated array ARGLIST, return the index in ARGLIST
of the matched element, else -1 if it does not match any element
- or -2 if it is ambiguous (is a prefix of more than one element). */
+ or -2 if it is ambiguous (is a prefix of more than one element).
+ If SENSITIVE, comparison is case sensitive.
-int
-argmatch (const char *arg, const char *const *optlist)
+ If VALLIST is none null, use it to resolve ambiguities limited to
+ synonyms, i.e., for
+ "yes", "yop" -> 0
+ "no", "nope" -> 1
+ "y" is a valid argument, for `0', and "n" for `1'. */
+
+static int
+__argmatch_internal (const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize,
+ int sensitive)
{
- int i; /* Temporary index in OPTLIST. */
+ int i; /* Temporary index in ARGLIST. */
size_t arglen; /* Length of ARG. */
int matchind = -1; /* Index of first nonexact match. */
int ambiguous = 0; /* If nonzero, multiple nonexact match(es). */
arglen = strlen (arg);
/* Test all elements for either exact match or abbreviated matches. */
- for (i = 0; optlist[i]; i++)
+ for (i = 0; arglist[i]; i++)
{
- if (!strncmp (optlist[i], arg, arglen))
+ if (sensitive ? !strncmp (arglist[i], arg, arglen)
+ : !strncasecmp (arglist[i], arg, arglen))
{
- if (strlen (optlist[i]) == arglen)
+ if (strlen (arglist[i]) == arglen)
/* Exact match found. */
return i;
else if (matchind == -1)
matchind = i;
else
/* Second nonexact match found. */
- ambiguous = 1;
+ if (vallist == NULL
+ || memcmp (vallist + valsize * matchind,
+ vallist + valsize * i, valsize))
+ /* There is a real ambiguity, or we could not
+ desambiguise. */
+ ambiguous = 1;
}
}
if (ambiguous)
return matchind;
}
+/* argmatch - case sensitive version */
+int
+argmatch (const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize)
+{
+ return __argmatch_internal (arg, arglist, vallist, valsize, 1);
+}
+
+/* argcasematch - case insensitive version */
+int
+argcasematch (const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize)
+{
+ return __argmatch_internal (arg, arglist, vallist, valsize, 0);
+}
+
/* Error reporting for argmatch.
KIND is a description of the type of entity that was being matched.
VALUE is the invalid value that was given.
PROBLEM is the return value from argmatch. */
void
-invalid_arg (const char *kind, const char *value, int problem)
+argmatch_invalid (const char *kind, const char *value, int problem)
{
- const char *fmt = (problem == -1
- ? "%s: invalid %s `%s'\n"
- : "%s: ambiguous %s `%s'\n");
- fprintf (stderr, fmt, program_name, kind, value);
+ enum quoting_style saved_quoting_style;
+
+ /* Make sure to have a good quoting style to report errors.
+ literal is insane here. */
+ saved_quoting_style = get_quoting_style (NULL);
+ set_quoting_style (NULL, ARGMATCH_QUOTING_STYLE);
+
+ /* There is an error */
+ fprintf (stderr, "%s: ", program_name);
+ if (problem == -1)
+ fprintf (stderr, _("invalid argument %s for `%s'"),
+ quotearg (value), kind);
+ else /* Assume -2. */
+ fprintf (stderr, _("ambiguous argument %s for `%s'"),
+ quotearg (value), kind);
+ putc ('\n', stderr);
+
+ set_quoting_style (NULL, saved_quoting_style);
}
+
+/* List the valid arguments for argmatch.
+ ARGLIST is the same as in argmatch.
+ VALLIST is a pointer to an array of values.
+ VALSIZE is the size of the elements of VALLIST */
+void
+argmatch_valid (const char *const *arglist,
+ const char *vallist, size_t valsize)
+{
+ int i;
+ const char * last_val = NULL;
+
+ /* We try to put synonyms on the same line. The assumption is that
+ synonyms follow each other */
+ fprintf (stderr, _("Valid arguments are:"));
+ for (i = 0 ; arglist[i] ; i++)
+ if ((i == 0)
+ || memcmp (last_val, vallist + valsize * i, valsize))
+ {
+ fprintf (stderr, "\n - `%s'", arglist[i]);
+ last_val = vallist + valsize * i;
+ }
+ else
+ {
+ fprintf (stderr, ", `%s'", arglist[i]);
+ }
+ putc ('\n', stderr);
+}
+
+/* Call __argmatch_internal, but handle the error so that it never
+ returns. Errors are reported to the users with a list of valid
+ values.
+
+ KIND is a description of the type of entity that was being matched.
+ ARG, ARGLIST, and SENSITIVE are the same as in __argmatch_internal
+ VALIST, and VALSIZE are the same as in valid_args */
+int
+__xargmatch_internal (const char *kind, const char *arg,
+ const char *const *arglist,
+ const char *vallist, size_t valsize,
+ int sensitive)
+{
+ int i;
+
+ i = __argmatch_internal (arg, arglist, vallist, valsize, sensitive);
+ if (i >= 0)
+ {
+ /* Success */
+ return i;
+ }
+ else
+ {
+ /* Failure */
+ argmatch_invalid (kind, arg, i);
+ argmatch_valid (arglist, vallist, valsize);
+ exit (EXIT_BADARG);
+ }
+ return -1; /* To please some compilers */
+}
+
+/* Look for VALUE in VALLIST, an array of objects of size VALSIZE and
+ return the first corresponding argument in ARGLIST */
+const char *
+argmatch_to_argument (char * value,
+ const char *const *arglist,
+ const char *vallist, size_t valsize)
+{
+ int i;
+
+ for (i = 0 ; arglist [i] ; i++)
+ if (!memcmp (value, vallist + valsize * i, valsize))
+ return arglist [i];
+ return NULL;
+}
+
+#ifdef TEST
+/*
+ * Based on "getversion.c" by David MacKenzie <djm@gnu.ai.mit.edu>
+ */
+char * program_name;
+extern const char * getenv ();
+
+/* When to make backup files. */
+enum backup_type
+{
+ /* Never make backups. */
+ none,
+
+ /* Make simple backups of every file. */
+ simple,
+
+ /* Make numbered backups of files that already have numbered backups,
+ and simple backups of the others. */
+ numbered_existing,
+
+ /* Make numbered backups of every file. */
+ numbered
+};
+
+/* Two tables describing arguments (keys) and their corresponding
+ values */
+static const char *const backup_args[] =
+{
+ "no", "none", "off",
+ "simple", "never",
+ "existing", "nil",
+ "numbered", "t",
+ 0
+};
+
+static const enum backup_type backup_vals[] =
+{
+ none, none, none,
+ simple, simple,
+ numbered_existing, numbered_existing,
+ numbered, numbered
+};
+
+int
+main (int argc, const char *const * argv)
+{
+ const char * cp;
+ enum backup_type backup_type = none;
+
+ program_name = (char *) argv [0];
+
+ if (argc > 2)
+ {
+ fprintf (stderr, "Usage: %s [VERSION_CONTROL]\n", program_name);
+ exit (1);
+ }
+
+ if ((cp = getenv ("VERSION_CONTROL")))
+ backup_type = XARGCASEMATCH ("$VERSION_CONTROL", cp,
+ backup_args, backup_vals);
+
+ if (argc == 2)
+ backup_type = XARGCASEMATCH (program_name, argv [1],
+ backup_args, backup_vals);
+
+ printf ("The version control is `%s'\n",
+ ARGMATCH_TO_ARGUMENT (backup_type, backup_args, backup_vals));
+
+ return 0;
+}
+#endif
-/* argmatch.h -- declarations for matching arguments against option lists */
+/* argmatch.c -- find a match for a string in an array
+ Copyright (C) 1990, 1998 Free Software Foundation, Inc.
-#if defined __STDC__ || __GNUC__
-# define __ARGMATCH_P(args) args
-#else
-# define __ARGMATCH_P(args) ()
-#endif
+ 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, or (at your option)
+ any later version.
-int argmatch __ARGMATCH_P ((const char *, const char * const *));
-void invalid_arg __ARGMATCH_P ((const char *, const char *, int));
+ 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.
-extern char *program_name;
+ 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. */
+
+/* Written by David MacKenzie <djm@ai.mit.edu>
+ Modified by Akim Demaille <demaille@inf.enst.fr> */
+
+#ifndef _ARGMATCH_H_
+# define _ARGMATCH_H_ 1
+
+# if HAVE_CONFIG_H
+# include <config.h>
+# endif
+
+# include <sys/types.h>
+
+# ifndef PARAMS
+# if PROTOTYPES || (defined (__STDC__) && __STDC__)
+# define PARAMS(args) args
+# else
+# define PARAMS(args) ()
+# endif /* GCC. */
+# endif /* Not PARAMS. */
+
+/* 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). */
+
+int argmatch
+ PARAMS ((const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize));
+int argcasematch
+ PARAMS ((const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize));
+
+# define ARGMATCH(ARG,ARGLIST,VALLIST) \
+ argmatch (ARG, ARGLIST, (const char *) VALLIST, sizeof (*VALLIST))
+
+# define ARGCASEMATCH(ARG,ARGLIST,VALLIST) \
+ argcasematch (ARG, ARGLIST, (const char *) VALLIST, sizeof (*VALLIST))
+
+
+
+/* Report on stderr why argmatch failed. Report correct values. */
+
+void argmatch_invalid
+ PARAMS ((const char *kind, const char *value, int problem));
+
+/* Left for compatibility with the old name invalid_arg */
+
+# define invalid_arg(KIND,VALUE,PROBLEM) \
+ argmatch_invalid (KIND, VALUE, PROBLEM)
+
+
+
+/* Report on stderr the list of possible arguments. */
+
+void argmatch_valid
+ PARAMS ((const char *const *arglist,
+ const char *vallist, size_t valsize));
+
+# define ARGMATCH_VALID(ARGLIST,VALLIST) \
+ valid_args (ARGLIST, (const char *) VALLIST, sizeof (*VALLIST))
+
+
+/* Returns matches, or, upon error, report explanatory message and
+ exit. */
+
+int __xargmatch_internal
+ PARAMS ((const char *kind,
+ const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize,
+ int sensitive));
+
+# define XARGMATCH(KIND,ARG,ARGLIST,VALLIST) \
+ VALLIST [__xargmatch_internal (KIND, ARG, ARGLIST, \
+ (const char *) VALLIST, sizeof (*VALLIST), 1)]
+
+# define XARGCASEMATCH(KIND,ARG,ARGLIST,VALLIST) \
+ VALLIST [__xargmatch_internal (KIND, ARG, ARGLIST, \
+ (const char *) VALLIST, sizeof (*VALLIST), 0)]
+
+
+
+/* Convert a value into a corresponding argument. */
+
+const char * argmatch_to_argument
+ PARAMS ((char * value, const char *const *arglist,
+ const char *vallist, size_t valsize));
+
+# define ARGMATCH_TO_ARGUMENT(VALUE,ARGLIST,VALLIST) \
+ argmatch_to_argument ((char *) &VALUE, ARGLIST, \
+ (const char *) VALLIST, sizeof (*VALLIST))
+
+#endif /* _ARGMATCH_H_ */
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