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-rw-r--r--lib/sh/mbscmp.c77
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diff --git a/lib/sh/mbscmp.c b/lib/sh/mbscmp.c
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+/* mbscmp - multibyte string comparison. */
+
+/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash 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.
+
+ Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#if !defined (HAVE_MBSCMP) && defined (HANDLE_MULTIBYTE)
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+
+extern int locale_utf8locale;
+
+extern int utf8_mbscmp (const char *, const char *);
+
+/* Compare MBS1 and MBS2. */
+int
+mbscmp (mbs1, mbs2)
+ const char *mbs1;
+ const char *mbs2;
+{
+ int len1, len2, mb_cur_max;
+ wchar_t c1, c2;
+
+ len1 = len2 = 0;
+ /* Reset multibyte characters to their initial state. */
+ (void) mblen ((char *) NULL, 0);
+
+ mb_cur_max = MB_CUR_MAX;
+ do
+ {
+ len1 = mbtowc (&c1, mbs1, mb_cur_max);
+ len2 = mbtowc (&c2, mbs2, mb_cur_max);
+
+ if (len1 == 0)
+ return len2 == 0 ? 0 : -1;
+ else if (len2 == 0)
+ return 1;
+ else if (len1 > 0 && len2 < 0)
+ return -1;
+ else if (len1 < 0 && len2 > 0)
+ return 1;
+ else if (len1 < 0 && len2 < 0)
+ {
+ len1 = strlen (mbs1);
+ len2 = strlen (mbs2);
+ return (len1 == len2 ? memcmp (mbs1, mbs2, len1)
+ : ((len1 < len2) ? (memcmp (mbs1, mbs2, len1) > 0 ? 1 : -1)
+ : (memcmp (mbs1, mbs2, len2) >= 0 ? 1 : -1)));
+ }
+
+ mbs1 += len1;
+ mbs2 += len2;
+ }
+ while (c1 == c2);
+
+ return c1 - c2;
+}
+
+#endif