1 files changed, 76 insertions, 0 deletions
diff --git a/lib/xmemcoll.c b/lib/xmemcoll.c
new file mode 100644
index 0000000..d7251d3
--- /dev/null
+++ b/lib/xmemcoll.c
@@ -0,0 +1,76 @@
+/* Locale-specific memory comparison.
+
+   Copyright (C) 2002-2004, 2006, 2009-2020 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 3 of the License, 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Contributed by Paul Eggert <eggert@twinsun.com>.  */
+
+#include <config.h>
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#include "error.h"
+#include "exitfail.h"
+#include "memcoll.h"
+#include "quotearg.h"
+#include "xmemcoll.h"
+
+static void
+collate_error (int collation_errno,
+               char const *s1, size_t s1len,
+               char const *s2, size_t s2len)
+{
+  error (0, collation_errno, _("string comparison failed"));
+  error (0, 0, _("Set LC_ALL='C' to work around the problem."));
+  error (exit_failure, 0,
+         _("The strings compared were %s and %s."),
+         quotearg_n_style_mem (0, locale_quoting_style, s1, s1len),
+         quotearg_n_style_mem (1, locale_quoting_style, s2, s2len));
+}
+
+/* Compare S1 (with length S1LEN) and S2 (with length S2LEN) according
+   to the LC_COLLATE locale.  S1 and S2 do not overlap, and are not
+   adjacent.  Temporarily modify the bytes after S1 and S2, but
+   restore their original contents before returning.  Report an error
+   and exit if there is an error.  */
+
+int
+xmemcoll (char *s1, size_t s1len, char *s2, size_t s2len)
+{
+  int diff = memcoll (s1, s1len, s2, s2len);
+  int collation_errno = errno;
+  if (collation_errno)
+    collate_error (collation_errno, s1, s1len, s2, s2len);
+  return diff;
+}
+
+/* Compare S1 (a memory block of size S1SIZE, with a NUL as last byte)
+   and S2 (a memory block of size S2SIZE, with a NUL as last byte)
+   according to the LC_COLLATE locale.  S1SIZE and S2SIZE must be > 0.
+   Report an error and exit if there is an error.  */
+
+int
+xmemcoll0 (char const *s1, size_t s1size, char const *s2, size_t s2size)
+{
+  int diff = memcoll0 (s1, s1size, s2, s2size);
+  int collation_errno = errno;
+  if (collation_errno)
+    collate_error (collation_errno, s1, s1size - 1, s2, s2size - 1);
+  return diff;
+}