1/* 2******************************************************************************* 3* 4* Copyright (C) 2004-2013, International Business Machines 5* Corporation and others. All Rights Reserved. 6* 7******************************************************************************* 8* file name: ubidi_props.h 9* encoding: US-ASCII 10* tab size: 8 (not used) 11* indentation:4 12* 13* created on: 2004dec30 14* created by: Markus W. Scherer 15* 16* Low-level Unicode bidi/shaping properties access. 17*/ 18 19#ifndef __UBIDI_PROPS_H__ 20#define __UBIDI_PROPS_H__ 21 22#include "unicode/utypes.h" 23#include "unicode/uset.h" 24#include "putilimp.h" 25#include "uset_imp.h" 26#include "udataswp.h" 27 28U_CDECL_BEGIN 29 30/* library API -------------------------------------------------------------- */ 31 32struct UBiDiProps; 33typedef struct UBiDiProps UBiDiProps; 34 35U_CFUNC const UBiDiProps * 36ubidi_getSingleton(void); 37 38U_CFUNC void 39ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode); 40 41/* property access functions */ 42 43U_CFUNC int32_t 44ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which); 45 46U_CAPI UCharDirection 47ubidi_getClass(const UBiDiProps *bdp, UChar32 c); 48 49U_CFUNC UBool 50ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c); 51 52U_CFUNC UChar32 53ubidi_getMirror(const UBiDiProps *bdp, UChar32 c); 54 55U_CFUNC UBool 56ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c); 57 58U_CFUNC UBool 59ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c); 60 61U_CFUNC UJoiningType 62ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c); 63 64U_CFUNC UJoiningGroup 65ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c); 66 67U_CFUNC UBidiPairedBracketType 68ubidi_getPairedBracketType(const UBiDiProps *bdp, UChar32 c); 69 70U_CFUNC UChar32 71ubidi_getPairedBracket(const UBiDiProps *bdp, UChar32 c); 72 73/* file definitions --------------------------------------------------------- */ 74 75#define UBIDI_DATA_NAME "ubidi" 76#define UBIDI_DATA_TYPE "icu" 77 78/* format "BiDi" */ 79#define UBIDI_FMT_0 0x42 80#define UBIDI_FMT_1 0x69 81#define UBIDI_FMT_2 0x44 82#define UBIDI_FMT_3 0x69 83 84/* indexes into indexes[] */ 85enum { 86 UBIDI_IX_INDEX_TOP, 87 UBIDI_IX_LENGTH, 88 UBIDI_IX_TRIE_SIZE, 89 UBIDI_IX_MIRROR_LENGTH, 90 91 UBIDI_IX_JG_START, 92 UBIDI_IX_JG_LIMIT, 93 94 UBIDI_MAX_VALUES_INDEX=15, 95 UBIDI_IX_TOP=16 96}; 97 98/* definitions for 16-bit bidi/shaping properties word ---------------------- */ 99 100enum { 101 /* UBIDI_CLASS_SHIFT=0, */ /* bidi class: 5 bits (4..0) */ 102 UBIDI_JT_SHIFT=5, /* joining type: 3 bits (7..5) */ 103 104 UBIDI_BPT_SHIFT=8, /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */ 105 106 UBIDI_JOIN_CONTROL_SHIFT=10, 107 UBIDI_BIDI_CONTROL_SHIFT=11, 108 109 UBIDI_IS_MIRRORED_SHIFT=12, /* 'is mirrored' */ 110 UBIDI_MIRROR_DELTA_SHIFT=13, /* bidi mirroring delta: 3 bits (15..13) */ 111 112 UBIDI_MAX_JG_SHIFT=16 /* max JG value in indexes[UBIDI_MAX_VALUES_INDEX] bits 23..16 */ 113}; 114 115#define UBIDI_CLASS_MASK 0x0000001f 116#define UBIDI_JT_MASK 0x000000e0 117#define UBIDI_BPT_MASK 0x00000300 118 119#define UBIDI_MAX_JG_MASK 0x00ff0000 120 121#define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK) 122#define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1) 123 124#if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 125# define UBIDI_GET_MIRROR_DELTA(props) ((int16_t)(props)>>UBIDI_MIRROR_DELTA_SHIFT) 126#else 127# define UBIDI_GET_MIRROR_DELTA(props) (int16_t)(((props)&0x8000) ? (((props)>>UBIDI_MIRROR_DELTA_SHIFT)|0xe000) : ((props)>>UBIDI_MIRROR_DELTA_SHIFT)) 128#endif 129 130enum { 131 UBIDI_ESC_MIRROR_DELTA=-4, 132 UBIDI_MIN_MIRROR_DELTA=-3, 133 UBIDI_MAX_MIRROR_DELTA=3 134}; 135 136/* definitions for 32-bit mirror table entry -------------------------------- */ 137 138enum { 139 /* the source Unicode code point takes 21 bits (20..0) */ 140 UBIDI_MIRROR_INDEX_SHIFT=21, 141 UBIDI_MAX_MIRROR_INDEX=0x7ff 142}; 143 144#define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff) 145 146#define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT) 147 148U_CDECL_END 149 150#endif 151