unicode_norm.h

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/*-------------------------------------------------------------------------
 *
 * unicode_norm.h
 *    Routines for normalizing Unicode strings
 *
 * These definitions are used by both frontend and backend code.
 *
 * Copyright (c) 2017-2025, PostgreSQL Global Development Group
 *
 * src/include/common/unicode_norm.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef UNICODE_NORM_H
#define UNICODE_NORM_H
 
typedef enum
{
    UNICODE_NFC = 0,
    UNICODE_NFD = 1,
    UNICODE_NFKC = 2,
    UNICODE_NFKD = 3,
} UnicodeNormalizationForm;
 
/* see UAX #15 */
typedef enum
{
    UNICODE_NORM_QC_NO = 0,
    UNICODE_NORM_QC_YES = 1,
    UNICODE_NORM_QC_MAYBE = -1,
} UnicodeNormalizationQC;
 
extern char32_t *unicode_normalize(UnicodeNormalizationForm form, const char32_t *input);
 
extern UnicodeNormalizationQC unicode_is_normalized_quickcheck(UnicodeNormalizationForm form, const char32_t *input);
 
#endif                          /* UNICODE_NORM_H */