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 27U_CDECL_BEGIN 28 29/* library API -------------------------------------------------------------- */ 30 31struct UBiDiProps; 32typedef struct UBiDiProps UBiDiProps; 33 34U_CFUNC const UBiDiProps * 35ubidi_getSingleton(void); 36 37U_CAPI int32_t 38ubidi_swap(const UDataSwapper *ds, 39 const void *inData, int32_t length, void *outData, 40 UErrorCode *pErrorCode); 41 42U_CFUNC void 43ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode); 44 45/* property access functions */ 46 47U_CFUNC int32_t 48ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which); 49 50U_CAPI UCharDirection 51ubidi_getClass(const UBiDiProps *bdp, UChar32 c); 52 53U_CFUNC UBool 54ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c); 55 56U_CFUNC UChar32 57ubidi_getMirror(const UBiDiProps *bdp, UChar32 c); 58 59U_CFUNC UBool 60ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c); 61 62U_CFUNC UBool 63ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c); 64 65U_CFUNC UJoiningType 66ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c); 67 68U_CFUNC UJoiningGroup 69ubidi_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[] */ 83enum { 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 98enum { 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 121enum { 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 129enum { 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 139U_CDECL_END 140 141#endif 142