1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2004-2014, 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 28 U_CDECL_BEGIN 29 30 /* library API -------------------------------------------------------------- */ 31 32 struct UBiDiProps; 33 typedef struct UBiDiProps UBiDiProps; 34 35 U_CFUNC const UBiDiProps * 36 ubidi_getSingleton(void); 37 38 U_CFUNC void 39 ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode); 40 41 /* property access functions */ 42 43 U_CFUNC int32_t 44 ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which); 45 46 U_CAPI UCharDirection 47 ubidi_getClass(const UBiDiProps *bdp, UChar32 c); 48 49 U_CFUNC UBool 50 ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c); 51 52 U_CFUNC UChar32 53 ubidi_getMirror(const UBiDiProps *bdp, UChar32 c); 54 55 U_CFUNC UBool 56 ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c); 57 58 U_CFUNC UBool 59 ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c); 60 61 U_CFUNC UJoiningType 62 ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c); 63 64 U_CFUNC UJoiningGroup 65 ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c); 66 67 U_CFUNC UBidiPairedBracketType 68 ubidi_getPairedBracketType(const UBiDiProps *bdp, UChar32 c); 69 70 U_CFUNC UChar32 71 ubidi_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[] */ 85 enum { 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 UBIDI_IX_JG_START2, /* new in format version 2.2, ICU 54 */ 94 UBIDI_IX_JG_LIMIT2, 95 96 UBIDI_MAX_VALUES_INDEX=15, 97 UBIDI_IX_TOP=16 98 }; 99 100 /* definitions for 16-bit bidi/shaping properties word ---------------------- */ 101 102 enum { 103 /* UBIDI_CLASS_SHIFT=0, */ /* bidi class: 5 bits (4..0) */ 104 UBIDI_JT_SHIFT=5, /* joining type: 3 bits (7..5) */ 105 106 UBIDI_BPT_SHIFT=8, /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */ 107 108 UBIDI_JOIN_CONTROL_SHIFT=10, 109 UBIDI_BIDI_CONTROL_SHIFT=11, 110 111 UBIDI_IS_MIRRORED_SHIFT=12, /* 'is mirrored' */ 112 UBIDI_MIRROR_DELTA_SHIFT=13, /* bidi mirroring delta: 3 bits (15..13) */ 113 114 UBIDI_MAX_JG_SHIFT=16 /* max JG value in indexes[UBIDI_MAX_VALUES_INDEX] bits 23..16 */ 115 }; 116 117 #define UBIDI_CLASS_MASK 0x0000001f 118 #define UBIDI_JT_MASK 0x000000e0 119 #define UBIDI_BPT_MASK 0x00000300 120 121 #define UBIDI_MAX_JG_MASK 0x00ff0000 122 123 #define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK) 124 #define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1) 125 126 #if U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 127 # define UBIDI_GET_MIRROR_DELTA(props) ((int16_t)(props)>>UBIDI_MIRROR_DELTA_SHIFT) 128 #else 129 # define UBIDI_GET_MIRROR_DELTA(props) (int16_t)(((props)&0x8000) ? (((props)>>UBIDI_MIRROR_DELTA_SHIFT)|0xe000) : ((props)>>UBIDI_MIRROR_DELTA_SHIFT)) 130 #endif 131 132 enum { 133 UBIDI_ESC_MIRROR_DELTA=-4, 134 UBIDI_MIN_MIRROR_DELTA=-3, 135 UBIDI_MAX_MIRROR_DELTA=3 136 }; 137 138 /* definitions for 32-bit mirror table entry -------------------------------- */ 139 140 enum { 141 /* the source Unicode code point takes 21 bits (20..0) */ 142 UBIDI_MIRROR_INDEX_SHIFT=21, 143 UBIDI_MAX_MIRROR_INDEX=0x7ff 144 }; 145 146 #define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff) 147 148 #define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT) 149 150 U_CDECL_END 151 152 #endif 153
