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	1	// © 2016 and later: Unicode, Inc. and others.
	2	// License & terms of use: http://www.unicode.org/copyright.html
	3	/*
	4	*******************************************************************************
	5	*
	6	* Copyright (C) 2004-2014, International Business Machines
	7	* Corporation and others. All Rights Reserved.
	8	*
	9	*******************************************************************************
	10	* file name: ubidi_props.h
	11	* encoding: UTF-8
	12	* tab size: 8 (not used)
	13	* indentation:4
	14	*
	15	* created on: 2004dec30
	16	* created by: Markus W. Scherer
	17	*
	18	* Low-level Unicode bidi/shaping properties access.
	19	*/
	20
	21	#ifndef __UBIDI_PROPS_H__
	22	#define __UBIDI_PROPS_H__
	23
	24	#include "unicode/utypes.h"
	25	#include "unicode/uset.h"
	26	#include "putilimp.h"
	27	#include "uset_imp.h"
	28	#include "udataswp.h"
	29
	30	U_CDECL_BEGIN
	31
	32	/* library API -------------------------------------------------------------- */
	33
	34	U_CFUNC void
	35	ubidi_addPropertyStarts(const USetAdder sa, UErrorCode pErrorCode);
	36
	37	/* property access functions */
	38
	39	U_CFUNC int32_t
	40	ubidi_getMaxValue(UProperty which);
	41
	42	U_CAPI UCharDirection
	43	ubidi_getClass(UChar32 c);
	44
	45	U_CFUNC UBool
	46	ubidi_isMirrored(UChar32 c);
	47
	48	U_CFUNC UChar32
	49	ubidi_getMirror(UChar32 c);
	50
	51	U_CFUNC UBool
	52	ubidi_isBidiControl(UChar32 c);
	53
	54	U_CFUNC UBool
	55	ubidi_isJoinControl(UChar32 c);
	56
	57	U_CFUNC UJoiningType
	58	ubidi_getJoiningType(UChar32 c);
	59
	60	U_CFUNC UJoiningGroup
	61	ubidi_getJoiningGroup(UChar32 c);
	62
	63	U_CFUNC UBidiPairedBracketType
	64	ubidi_getPairedBracketType(UChar32 c);
	65
	66	U_CFUNC UChar32
	67	ubidi_getPairedBracket(UChar32 c);
	68
	69	/* file definitions --------------------------------------------------------- */
	70
	71	#define UBIDI_DATA_NAME "ubidi"
	72	#define UBIDI_DATA_TYPE "icu"
	73
	74	/* format "BiDi" */
	75	#define UBIDI_FMT_0 0x42
	76	#define UBIDI_FMT_1 0x69
	77	#define UBIDI_FMT_2 0x44
	78	#define UBIDI_FMT_3 0x69
	79
	80	/* indexes into indexes[] */
	81	enum {
	82	UBIDI_IX_INDEX_TOP,
	83	UBIDI_IX_LENGTH,
	84	UBIDI_IX_TRIE_SIZE,
	85	UBIDI_IX_MIRROR_LENGTH,
	86
	87	UBIDI_IX_JG_START,
	88	UBIDI_IX_JG_LIMIT,
	89	UBIDI_IX_JG_START2, /* new in format version 2.2, ICU 54 */
	90	UBIDI_IX_JG_LIMIT2,
	91
	92	UBIDI_MAX_VALUES_INDEX=15,
	93	UBIDI_IX_TOP=16
	94	};
	95
	96	/* definitions for 16-bit bidi/shaping properties word ---------------------- */
	97
	98	enum {
	99	/* UBIDI_CLASS_SHIFT=0, / / bidi class: 5 bits (4..0) */
	100	UBIDI_JT_SHIFT=5, /* joining type: 3 bits (7..5) */
	101
	102	UBIDI_BPT_SHIFT=8, /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */
	103
	104	UBIDI_JOIN_CONTROL_SHIFT=10,
	105	UBIDI_BIDI_CONTROL_SHIFT=11,
	106
	107	UBIDI_IS_MIRRORED_SHIFT=12, /* 'is mirrored' */
	108	UBIDI_MIRROR_DELTA_SHIFT=13, /* bidi mirroring delta: 3 bits (15..13) */
	109
	110	UBIDI_MAX_JG_SHIFT=16 /* max JG value in indexes[UBIDI_MAX_VALUES_INDEX] bits 23..16 */
	111	};
	112
	113	#define UBIDI_CLASS_MASK 0x0000001f
	114	#define UBIDI_JT_MASK 0x000000e0
	115	#define UBIDI_BPT_MASK 0x00000300
	116
	117	#define UBIDI_MAX_JG_MASK 0x00ff0000
	118
	119	#define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK)
	120	#define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1)
	121
	122	#if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
	123	# define UBIDI_GET_MIRROR_DELTA(props) ((int16_t)(props)>>UBIDI_MIRROR_DELTA_SHIFT)
	124	#else
	125	# define UBIDI_GET_MIRROR_DELTA(props) (int16_t)(((props)&0x8000) ? (((props)>>UBIDI_MIRROR_DELTA_SHIFT)\|0xe000) : ((props)>>UBIDI_MIRROR_DELTA_SHIFT))
	126	#endif
	127
	128	enum {
	129	UBIDI_ESC_MIRROR_DELTA=-4,
	130	UBIDI_MIN_MIRROR_DELTA=-3,
	131	UBIDI_MAX_MIRROR_DELTA=3
	132	};
	133
	134	/* definitions for 32-bit mirror table entry -------------------------------- */
	135
	136	enum {
	137	/* the source Unicode code point takes 21 bits (20..0) */
	138	UBIDI_MIRROR_INDEX_SHIFT=21,
	139	UBIDI_MAX_MIRROR_INDEX=0x7ff
	140	};
	141
	142	#define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff)
	143
	144	#define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT)
	145
	146	U_CDECL_END
	147
	148	#endif