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// Copyright (C) 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2004-2014, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: ubidi_props.h
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2004dec30
* created by: Markus W. Scherer
*
* Low-level Unicode bidi/shaping properties access.
*/
#ifndef __UBIDI_PROPS_H__
#define __UBIDI_PROPS_H__
#include "unicode/utypes.h"
#include "unicode/uset.h"
#include "putilimp.h"
#include "uset_imp.h"
#include "udataswp.h"
U_CDECL_BEGIN
/* library API -------------------------------------------------------------- */
struct UBiDiProps;
typedef struct UBiDiProps UBiDiProps;
U_CFUNC const UBiDiProps *
ubidi_getSingleton(void);
U_CFUNC void
ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode);
/* property access functions */
U_CFUNC int32_t
ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which);
U_CAPI UCharDirection
ubidi_getClass(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UChar32
ubidi_getMirror(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UJoiningType
ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UJoiningGroup
ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBidiPairedBracketType
ubidi_getPairedBracketType(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UChar32
ubidi_getPairedBracket(const UBiDiProps *bdp, UChar32 c);
/* file definitions --------------------------------------------------------- */
#define UBIDI_DATA_NAME "ubidi"
#define UBIDI_DATA_TYPE "icu"
/* format "BiDi" */
#define UBIDI_FMT_0 0x42
#define UBIDI_FMT_1 0x69
#define UBIDI_FMT_2 0x44
#define UBIDI_FMT_3 0x69
/* indexes into indexes[] */
enum {
UBIDI_IX_INDEX_TOP,
UBIDI_IX_LENGTH,
UBIDI_IX_TRIE_SIZE,
UBIDI_IX_MIRROR_LENGTH,
UBIDI_IX_JG_START,
UBIDI_IX_JG_LIMIT,
UBIDI_IX_JG_START2, /* new in format version 2.2, ICU 54 */
UBIDI_IX_JG_LIMIT2,
UBIDI_MAX_VALUES_INDEX=15,
UBIDI_IX_TOP=16
};
/* definitions for 16-bit bidi/shaping properties word ---------------------- */
enum {
/* UBIDI_CLASS_SHIFT=0, */ /* bidi class: 5 bits (4..0) */
UBIDI_JT_SHIFT=5, /* joining type: 3 bits (7..5) */
UBIDI_BPT_SHIFT=8, /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */
UBIDI_JOIN_CONTROL_SHIFT=10,
UBIDI_BIDI_CONTROL_SHIFT=11,
UBIDI_IS_MIRRORED_SHIFT=12, /* 'is mirrored' */
UBIDI_MIRROR_DELTA_SHIFT=13, /* bidi mirroring delta: 3 bits (15..13) */
UBIDI_MAX_JG_SHIFT=16 /* max JG value in indexes[UBIDI_MAX_VALUES_INDEX] bits 23..16 */
};
#define UBIDI_CLASS_MASK 0x0000001f
#define UBIDI_JT_MASK 0x000000e0
#define UBIDI_BPT_MASK 0x00000300
#define UBIDI_MAX_JG_MASK 0x00ff0000
#define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK)
#define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1)
#if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
# define UBIDI_GET_MIRROR_DELTA(props) ((int16_t)(props)>>UBIDI_MIRROR_DELTA_SHIFT)
#else
# define UBIDI_GET_MIRROR_DELTA(props) (int16_t)(((props)&0x8000) ? (((props)>>UBIDI_MIRROR_DELTA_SHIFT)|0xe000) : ((props)>>UBIDI_MIRROR_DELTA_SHIFT))
#endif
enum {
UBIDI_ESC_MIRROR_DELTA=-4,
UBIDI_MIN_MIRROR_DELTA=-3,
UBIDI_MAX_MIRROR_DELTA=3
};
/* definitions for 32-bit mirror table entry -------------------------------- */
enum {
/* the source Unicode code point takes 21 bits (20..0) */
UBIDI_MIRROR_INDEX_SHIFT=21,
UBIDI_MAX_MIRROR_INDEX=0x7ff
};
#define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff)
#define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT)
U_CDECL_END
#endif
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