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