1 files changed, 61 insertions, 0 deletions
diff --git a/contrib/tsearch2/ts_locale.c b/contrib/tsearch2/ts_locale.c
new file mode 100644
index 00000000000..b84681f1b07
--- /dev/null
+++ b/contrib/tsearch2/ts_locale.c
@@ -0,0 +1,61 @@
+#include "ts_locale.h"
+
+#include "utils/builtins.h"
+#include "utils/pg_locale.h"
+#include "mb/pg_wchar.h"
+
+
+#if defined(TS_USE_WIDE) && defined(WIN32)
+
+size_t
+wchar2char( const char *to, const wchar_t *from, size_t len ) {
+	if (GetDatabaseEncoding() == PG_UTF8) {
+		int	r;
+
+		if (len==0)
+			return 0;
+
+		r = WideCharToMultiByte(CP_UTF8, 0, from, len, to, nbytes,
+				NULL, NULL);
+
+		
+		if ( r==0 )
+			ereport(ERROR,
+				(errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
+				 	errmsg("UTF-16 to UTF-8 translation failed: %lu",
+						GetLastError())));
+
+		return r;
+	}
+
+	return wcstombs(to, from, len);
+}
+
+size_t 
+char2wchar( const wchar_t *to, const char *from, size_t len ) {
+	if (GetDatabaseEncoding() == PG_UTF8) {
+		int	r;
+
+		if (len==0)
+			return 0;
+
+		r = MultiByteToWideChar(CP_UTF8, 0, from, len,
+			to, len);
+
+		if (!r) {
+			pg_verifymbstr(from, len, false);
+			ereport(ERROR,
+				(errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
+				errmsg("invalid multibyte character for locale"),
+				errhint("The server's LC_CTYPE locale is probably incompatible with the database encoding.")));
+		}
+
+		Assert(r <= nbytes);
+
+		return r;
+	}
+	
+	return mbstowcs(to, from, len);
+}
+
+#endif