/* argmatch.c -- find a match for a string in an array
- Copyright (C) 1990, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1998, 1999 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 ENABLE_NLS
+# include <libintl.h>
+# define _(Text) gettext (Text)
#else
-# include <strings.h>
+# define _(Text) Text
+#endif
+
+#include "error.h"
+#include "quotearg.h"
+
+/* When reporting an invalid argument, show nonprinting characters
+ by using the quoting style ARGMATCH_QUOTING_STYLE. Do not use
+ literal_quoting_style. */
+#ifndef ARGMATCH_QUOTING_STYLE
+# define ARGMATCH_QUOTING_STYLE locale_quoting_style
+#endif
+
+/* The following test is to work around the gross typo in
+ systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
+ is defined to 0, not 1. */
+#if !EXIT_FAILURE
+# undef EXIT_FAILURE
+# define EXIT_FAILURE 1
+#endif
+
+/* Non failing version of argmatch call this function after failing. */
+#ifndef ARGMATCH_DIE
+# define ARGMATCH_DIE exit (EXIT_FAILURE)
#endif
+#ifdef ARGMATCH_DIE_DECL
+ARGMATCH_DIE_DECL;
+#endif
+
+static void
+__argmatch_die (void)
+{
+ ARGMATCH_DIE;
+}
+
+/* Used by XARGMATCH and XARGCASEMATCH. See description in argmatch.h.
+ Default to __argmatch_die, but allow caller to change this at run-time. */
+argmatch_exit_fn argmatch_die = __argmatch_die;
+
+\f
/* 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 case_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 (case_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)
/* First nonexact match found. */
matchind = i;
else
- /* Second nonexact match found. */
- ambiguous = 1;
+ {
+ /* Second nonexact match found. */
+ if (vallist == NULL
+ || memcmp (vallist + valsize * matchind,
+ vallist + valsize * i, valsize))
+ {
+ /* There is a real ambiguity, or we could not
+ disambiguate. */
+ 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.
+ CONTEXT 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 *context, 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);
+ char const *format = (problem == -1
+ ? _("invalid argument %s for `%s'")
+ : _("ambiguous argument %s for `%s'"));
+
+ error (0, 0, format, quotearg_style (ARGMATCH_QUOTING_STYLE, value), context);
+}
+
+/* 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);
}
+
+/* Never failing versions of the previous functions.
+
+ CONTEXT is the context for which argmatch is called (e.g.,
+ "--version-control", or "$VERSION_CONTROL" etc.). Upon failure,
+ calls the (supposed never to return) function EXIT_FN. */
+
+int
+__xargmatch_internal (const char *context,
+ const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize,
+ int case_sensitive,
+ argmatch_exit_fn exit_fn)
+{
+ int res = __argmatch_internal (arg, arglist,
+ vallist, valsize,
+ case_sensitive);
+ if (res >= 0)
+ /* Success. */
+ return res;
+
+ /* We failed. Explain why. */
+ argmatch_invalid (context, arg, res);
+ argmatch_valid (arglist, vallist, valsize);
+ (*exit_fn) ();
+
+ return -1; /* To please the 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 (const 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
projects / gnulib.git / blobdiff