1 /*-------------------------------------------------------------------------
2  *
3  * unicode_norm.h
4  *	  Routines for normalizing Unicode strings
5  *
6  * These definitions are used by both frontend and backend code.
7  *
8  * Copyright (c) 2017-2020, PostgreSQL Global Development Group
9  *
10  * src/include/common/unicode_norm.h
11  *
12  *-------------------------------------------------------------------------
13  */
14 #ifndef UNICODE_NORM_H
15 #define UNICODE_NORM_H
16 
17 #include "mb/pg_wchar.h"
18 
19 typedef enum
20 {
21 	UNICODE_NFC = 0,
22 	UNICODE_NFD = 1,
23 	UNICODE_NFKC = 2,
24 	UNICODE_NFKD = 3,
25 } UnicodeNormalizationForm;
26 
27 /* see UAX #15 */
28 typedef enum
29 {
30 	UNICODE_NORM_QC_NO = 0,
31 	UNICODE_NORM_QC_YES = 1,
32 	UNICODE_NORM_QC_MAYBE = -1,
33 } UnicodeNormalizationQC;
34 
35 extern pg_wchar *unicode_normalize(UnicodeNormalizationForm form, const pg_wchar *input);
36 
37 extern UnicodeNormalizationQC unicode_is_normalized_quickcheck(UnicodeNormalizationForm form, const pg_wchar *input);
38 
39 #endif							/* UNICODE_NORM_H */
40