1 files changed, 61 insertions, 0 deletions
diff --git a/REORG.TODO/stdlib/rpmatch.c b/REORG.TODO/stdlib/rpmatch.c
new file mode 100644
index 0000000000..965c2999d8
--- /dev/null
+++ b/REORG.TODO/stdlib/rpmatch.c
@@ -0,0 +1,61 @@
+/* Determine whether string value is affirmation or negative response
+   according to current locale's data.
+   This file is part of the GNU C Library.
+   Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <langinfo.h>
+#include <stdlib.h>
+#include <regex.h>
+
+
+/* Match against one of the response patterns, compiling the pattern
+   first if necessary.  */
+static int
+try (const char *response,
+     const int tag, const int match, const int nomatch,
+     const char **lastp, regex_t *re)
+{
+  const char *pattern = nl_langinfo (tag);
+  if (pattern != *lastp)
+    {
+      /* The pattern has changed.  */
+      if (*lastp != NULL)
+        {
+          /* Free the old compiled pattern.  */
+          __regfree (re);
+          *lastp = NULL;
+        }
+      /* Compile the pattern and cache it for future runs.  */
+      if (__regcomp (re, pattern, REG_EXTENDED) != 0)
+        return -1;
+      *lastp = pattern;
+    }
+
+  /* Try the pattern.  */
+  return __regexec (re, response, 0, NULL, 0) == 0 ? match : nomatch;
+}
+
+int
+rpmatch (const char *response)
+{
+  /* We cache the response patterns and compiled regexps here.  */
+  static const char *yesexpr, *noexpr;
+  static regex_t yesre, nore;
+
+  return (try (response, YESEXPR, 1, 0, &yesexpr, &yesre) ?:
+	  try (response, NOEXPR, 0, -1, &noexpr, &nore));
+}