1 files changed, 77 insertions, 0 deletions
diff --git a/src/backend/utils/mb/wstrncmp.c b/src/backend/utils/mb/wstrncmp.c
new file mode 100644
index 0000000..ea4823f
--- /dev/null
+++ b/src/backend/utils/mb/wstrncmp.c
@@ -0,0 +1,77 @@
+/*
+ * src/backend/utils/mb/wstrncmp.c
+ *
+ *
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from FreeBSD 2.2.1-RELEASE software.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *	  notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *	  notice, this list of conditions and the following disclaimer in the
+ *	  documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *	  may be used to endorse or promote products derived from this software
+ *	  without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/* can be used in either frontend or backend */
+#include "postgres_fe.h"
+
+#include "mb/pg_wchar.h"
+
+int
+pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n)
+{
+	if (n == 0)
+		return 0;
+	do
+	{
+		if (*s1 != *s2++)
+			return (*s1 - *(s2 - 1));
+		if (*s1++ == 0)
+			break;
+	} while (--n != 0);
+	return 0;
+}
+
+int
+pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n)
+{
+	if (n == 0)
+		return 0;
+	do
+	{
+		if ((pg_wchar) ((unsigned char) *s1) != *s2++)
+			return ((pg_wchar) ((unsigned char) *s1) - *(s2 - 1));
+		if (*s1++ == 0)
+			break;
+	} while (--n != 0);
+	return 0;
+}
+
+size_t
+pg_wchar_strlen(const pg_wchar *str)
+{
+	const pg_wchar *s;
+
+	for (s = str; *s; ++s)
+		;
+	return (s - str);
+}