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/*-------------------------------------------------------------------------
*
* unicode_category.h
* Routines for determining the category of Unicode characters.
*
* These definitions can be used by both frontend and backend code.
*
* Copyright (c) 2017-2024, PostgreSQL Global Development Group
*
* src/include/common/unicode_category.h
*
*-------------------------------------------------------------------------
*/
#ifndef UNICODE_CATEGORY_H
#define UNICODE_CATEGORY_H
#include "mb/pg_wchar.h"
/*
* Unicode General Category Values
*
* See: https://www.unicode.org/reports/tr44/#General_Category_Values
*
* The Unicode stability policy guarantees: "The enumeration of
* General_Category property values is fixed. No new values will be
* added". See: https://www.unicode.org/policies/stability_policy.html
*
* Numeric values chosen to match corresponding ICU UCharCategory.
*/
typedef enum pg_unicode_category
{
PG_U_UNASSIGNED = 0, /* Cn */
PG_U_UPPERCASE_LETTER = 1, /* Lu */
PG_U_LOWERCASE_LETTER = 2, /* Ll */
PG_U_TITLECASE_LETTER = 3, /* Lt */
PG_U_MODIFIER_LETTER = 4, /* Lm */
PG_U_OTHER_LETTER = 5, /* Lo */
PG_U_NONSPACING_MARK = 6, /* Mn */
PG_U_ENCLOSING_MARK = 7, /* Me */
PG_U_SPACING_MARK = 8, /* Mc */
PG_U_DECIMAL_NUMBER = 9, /* Nd */
PG_U_LETTER_NUMBER = 10, /* Nl */
PG_U_OTHER_NUMBER = 11, /* No */
PG_U_SPACE_SEPARATOR = 12, /* Zs */
PG_U_LINE_SEPARATOR = 13, /* Zl */
PG_U_PARAGRAPH_SEPARATOR = 14, /* Zp */
PG_U_CONTROL = 15, /* Cc */
PG_U_FORMAT = 16, /* Cf */
PG_U_PRIVATE_USE = 17, /* Co */
PG_U_SURROGATE = 18, /* Cs */
PG_U_DASH_PUNCTUATION = 19, /* Pd */
PG_U_OPEN_PUNCTUATION = 20, /* Ps */
PG_U_CLOSE_PUNCTUATION = 21, /* Pe */
PG_U_CONNECTOR_PUNCTUATION = 22, /* Pc */
PG_U_OTHER_PUNCTUATION = 23, /* Po */
PG_U_MATH_SYMBOL = 24, /* Sm */
PG_U_CURRENCY_SYMBOL = 25, /* Sc */
PG_U_MODIFIER_SYMBOL = 26, /* Sk */
PG_U_OTHER_SYMBOL = 27, /* So */
PG_U_INITIAL_PUNCTUATION = 28, /* Pi */
PG_U_FINAL_PUNCTUATION = 29 /* Pf */
} pg_unicode_category;
extern pg_unicode_category unicode_category(pg_wchar ucs);
const char *unicode_category_string(pg_unicode_category category);
const char *unicode_category_abbrev(pg_unicode_category category);
#endif /* UNICODE_CATEGORY_H */
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