/* argmatch.c -- find a match for a string in an array
- Copyright (C) 1990, 1998, 1999 Free Software Foundation, Inc.
+
+ Copyright (C) 1990, 1998, 1999, 2001, 2002, 2003, 2004 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
/* Written by David MacKenzie <djm@ai.mit.edu>
Modified by Akim Demaille <demaille@inf.enst.fr> */
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification. */
#include "argmatch.h"
+#include <stdbool.h>
#include <stdio.h>
-#ifdef STDC_HEADERS
-# include <string.h>
-#endif
+#include <stdlib.h>
+#include <string.h>
-#if HAVE_LOCALE_H
-# include <locale.h>
-#endif
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
-#if ENABLE_NLS
-# include <libintl.h>
-# define _(Text) gettext (Text)
-#else
-# define _(Text) Text
-#endif
+#include "error.h"
+#include "exit.h"
+#include "quotearg.h"
+#include "quote.h"
+#include "unlocked-io.h"
-#ifndef EXIT_BADARG
-# define EXIT_BADARG 1
+/* 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
-#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. */
+/* Non failing version of argmatch call this function after failing. */
+#ifndef ARGMATCH_DIE
+# include "exitfail.h"
+# define ARGMATCH_DIE exit (exit_failure)
+#endif
-#ifndef ARGMATCH_QUOTING_STYLE
-# define ARGMATCH_QUOTING_STYLE c_quoting_style
+#ifdef ARGMATCH_DIE_DECL
+ARGMATCH_DIE_DECL;
#endif
-extern char *program_name;
+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 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).
- If SENSITIVE, comparison is case sensitive.
If VALLIST is none null, use it to resolve ambiguities limited to
synonyms, i.e., for
"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)
+ptrdiff_t
+argmatch (const char *arg, const char *const *arglist,
+ const char *vallist, size_t valsize)
{
- int i; /* Temporary index in ARGLIST. */
+ size_t 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). */
+ ptrdiff_t matchind = -1; /* Index of first nonexact match. */
+ bool ambiguous = false; /* If true, multiple nonexact match(es). */
arglen = strlen (arg);
/* Test all elements for either exact match or abbreviated matches. */
for (i = 0; arglist[i]; i++)
{
- if (case_sensitive
- ? !strncmp (arglist[i], arg, arglen)
- : !strncasecmp (arglist[i], arg, arglen))
+ if (!strncmp (arglist[i], arg, arglen))
{
if (strlen (arglist[i]) == arglen)
/* Exact match found. */
{
/* There is a real ambiguity, or we could not
disambiguate. */
- ambiguous = 1;
+ ambiguous = true;
}
}
}
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
-argmatch_invalid (const char *kind, const char *value, int problem)
+argmatch_invalid (const char *context, const char *value, ptrdiff_t problem)
{
- 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);
+ char const *format = (problem == -1
+ ? _("invalid argument %s for %s")
+ : _("ambiguous argument %s for %s"));
- set_quoting_style (NULL, saved_quoting_style);
+ error (0, 0, format, quotearg_n_style (0, ARGMATCH_QUOTING_STYLE, value),
+ quote_n (1, context));
}
/* List the valid arguments for argmatch.
argmatch_valid (const char *const *arglist,
const char *vallist, size_t valsize)
{
- int i;
+ size_t i;
const char *last_val = NULL;
/* We try to put synonyms on the same line. The assumption is that
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.
+/* Never failing versions of the previous functions.
- 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,
+ CONTEXT is the context for which argmatch is called (e.g.,
+ "--version-control", or "$VERSION_CONTROL" etc.). Upon failure,
+ calls the (supposed never to return) function EXIT_FN. */
+
+ptrdiff_t
+__xargmatch_internal (const char *context,
+ const char *arg, const char *const *arglist,
const char *vallist, size_t valsize,
- int case_sensitive)
+ argmatch_exit_fn exit_fn)
{
- int i;
+ ptrdiff_t res = argmatch (arg, arglist, vallist, valsize);
+ if (res >= 0)
+ /* Success. */
+ return res;
- i = __argmatch_internal (arg, arglist, vallist, valsize, case_sensitive);
- if (i >= 0)
- {
- /* Success */
- return i;
- }
- else
- {
- /* Failure */
- argmatch_invalid (kind, arg, i);
- argmatch_valid (arglist, vallist, valsize);
- exit (EXIT_BADARG);
- }
- return -1; /* To please some compilers */
+ /* We failed. Explain why. */
+ argmatch_invalid (context, arg, res);
+ argmatch_valid (arglist, vallist, valsize);
+ (*exit_fn) ();
+
+ return -1; /* To please the compilers. */
}
/* Look for VALUE in VALLIST, an array of objects of size VALSIZE and
return the first corresponding argument in ARGLIST */
const char *
-argmatch_to_argument (char *value,
+argmatch_to_argument (const char *value,
const char *const *arglist,
const char *vallist, size_t valsize)
{
- int i;
+ size_t i;
for (i = 0; arglist[i]; i++)
if (!memcmp (value, vallist + valsize * i, valsize))
/*
* Based on "getversion.c" by David MacKenzie <djm@gnu.ai.mit.edu>
*/
-char *rogram_name;
-extern const char *getenv ();
+char *program_name;
/* When to make backup files. */
enum backup_type
}
if ((cp = getenv ("VERSION_CONTROL")))
- backup_type = XARGCASEMATCH ("$VERSION_CONTROL", cp,
- backup_args, backup_vals);
+ backup_type = XARGMATCH ("$VERSION_CONTROL", cp,
+ backup_args, backup_vals);
if (argc == 2)
- backup_type = XARGCASEMATCH (program_name, argv[1],
- backup_args, backup_vals);
+ backup_type = XARGMATCH (program_name, argv[1],
+ backup_args, backup_vals);
printf ("The version control is `%s'\n",
ARGMATCH_TO_ARGUMENT (backup_type, backup_args, backup_vals));