tweak comment

[gnulib.git] / lib / rpmatch.c

diff --git a/lib/rpmatch.c b/lib/rpmatch.c
index 55d3bba..fbd62e2 100644 (file)
--- a/lib/rpmatch.c
+++ b/lib/rpmatch.c
@@ -1,46 +1,43 @@
-/* rpmatch - determine whether string value is affirmation or negative
-            response according to current locale's data
-Copyright (C) 1996 Free Software Foundation, Inc.
+/* Determine whether string value is affirmation or negative response
+   according to current locale's data.
+   Copyright (C) 1996, 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
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+   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.
 
-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.
+   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, write to the Free Software Foundation,
-Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   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.  */
 
-#ifdef HAVE_CONFIG_H
+#if HAVE_CONFIG_H
 # include <config.h>
 #endif
 
 #if STDC_HEADERS || _LIBC
+# include <stddef.h>
 # include <stdlib.h>
+#else
+# ifndef NULL
+#  define NULL 0
+# endif
 #endif
 
-#include <regex.h>
-
 #if ENABLE_NLS
+# include <sys/types.h>
+# include <regex.h>
 # include <libintl.h>
 # define _(Text) gettext (Text)
-#else
-# define _(Text) Text
-#endif
 
 static int
-try (response, pattern, match, nomatch, lastp, re)
-     const char *response;
-     const char *pattern;
-     const int match;
-     const int nomatch;
-     const char **lastp;
-     regex_t *re;
+try (const char *response, const char *pattern, const int match,
+     const int nomatch, const char **lastp, regex_t *re)
 {
   if (pattern != *lastp)
     {
@@ -60,12 +57,13 @@ try (response, pattern, match, nomatch, lastp, re)
   /* See if the regular expression matches RESPONSE.  */
   return regexec (re, response, 0, NULL, 0) == 0 ? match : nomatch;
 }
+#endif
 
 
 int
-rpmatch (response)
-     const char *response;
+rpmatch (const char *response)
 {
+#if ENABLE_NLS
   /* Match against one of the response patterns, compiling the pattern
      first if necessary.  */
 
@@ -78,4 +76,9 @@ rpmatch (response)
                         &yesexpr, &yesre))
          ? result
          : try (response, _("^[nN]"), 0, -1, &noexpr, &nore));
+#else
+  /* Test against "^[yY]" and "^[nN]", hardcoded to avoid requiring regex */
+  return (*response == 'y' || *response == 'Y' ? 1
+         : *response == 'n' || *response == 'N' ? 0 : -1);
+#endif
 }