1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2004-2010, 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 "uset_imp.h" 25 #include "udataswp.h" 26 27 U_CDECL_BEGIN 28 29 /* library API -------------------------------------------------------------- */ 30 31 struct UBiDiProps; 32 typedef struct UBiDiProps UBiDiProps; 33 34 U_CFUNC const UBiDiProps * 35 ubidi_getSingleton(void); 36 37 U_CAPI int32_t 38 ubidi_swap(const UDataSwapper *ds, 39 const void *inData, int32_t length, void *outData, 40 UErrorCode *pErrorCode); 41 42 U_CFUNC void 43 ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode); 44 45 /* property access functions */ 46 47 U_CFUNC int32_t 48 ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which); 49 50 U_CAPI UCharDirection 51 ubidi_getClass(const UBiDiProps *bdp, UChar32 c); 52 53 U_CFUNC UBool 54 ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c); 55 56 U_CFUNC UChar32 57 ubidi_getMirror(const UBiDiProps *bdp, UChar32 c); 58 59 U_CFUNC UBool 60 ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c); 61 62 U_CFUNC UBool 63 ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c); 64 65 U_CFUNC UJoiningType 66 ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c); 67 68 U_CFUNC UJoiningGroup 69 ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c); 70 71 /* file definitions --------------------------------------------------------- */ 72 73 #define UBIDI_DATA_NAME "ubidi" 74 #define UBIDI_DATA_TYPE "icu" 75 76 /* format "BiDi" */ 77 #define UBIDI_FMT_0 0x42 78 #define UBIDI_FMT_1 0x69 79 #define UBIDI_FMT_2 0x44 80 #define UBIDI_FMT_3 0x69 81 82 /* indexes into indexes[] */ 83 enum { 84 UBIDI_IX_INDEX_TOP, 85 UBIDI_IX_LENGTH, 86 UBIDI_IX_TRIE_SIZE, 87 UBIDI_IX_MIRROR_LENGTH, 88 89 UBIDI_IX_JG_START, 90 UBIDI_IX_JG_LIMIT, 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__SHIFT=8, reserved: 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 115 116 #define UBIDI_MAX_JG_MASK 0x00ff0000 117 118 #define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK) 119 #define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1) 120 121 enum { 122 UBIDI_ESC_MIRROR_DELTA=-4, 123 UBIDI_MIN_MIRROR_DELTA=-3, 124 UBIDI_MAX_MIRROR_DELTA=3 125 }; 126 127 /* definitions for 32-bit mirror table entry -------------------------------- */ 128 129 enum { 130 /* the source Unicode code point takes 21 bits (20..0) */ 131 UBIDI_MIRROR_INDEX_SHIFT=21, 132 UBIDI_MAX_MIRROR_INDEX=0x7ff 133 }; 134 135 #define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff) 136 137 #define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT) 138 139 U_CDECL_END 140 141 #endif 142