1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
4 *******************************************************************************
6 * Copyright (C) 2004-2014, International Business Machines
7 * Corporation and others. All Rights Reserved.
9 *******************************************************************************
10 * file name: ubidi_props.c
12 * tab size: 8 (not used)
15 * created on: 2004dec30
16 * created by: Markus W. Scherer
18 * Low-level Unicode bidi/shaping properties access.
21 #include "unicode/utypes.h"
22 #include "unicode/uset.h"
23 #include "unicode/udata.h" /* UDataInfo */
24 #include "ucmndata.h" /* DataHeader */
29 #include "ubidi_props.h"
34 const int32_t *indexes;
35 const uint32_t *mirrors;
36 const uint8_t *jgArray;
37 const uint8_t *jgArray2;
40 uint8_t formatVersion[4];
43 /* ubidi_props_data.h is machine-generated by genbidi --csource */
44 #define INCLUDED_FROM_UBIDI_PROPS_C
45 #include "ubidi_props_data.h"
47 /* UBiDiProps singleton ----------------------------------------------------- */
49 U_CFUNC const UBiDiProps *
50 ubidi_getSingleton() {
51 return &ubidi_props_singleton;
54 /* set of property starts for UnicodeSet ------------------------------------ */
56 static UBool U_CALLCONV
57 _enumPropertyStartsRange(const void *context, UChar32 start, UChar32 end, uint32_t value) {
58 /* add the start code point to the USet */
59 const USetAdder *sa=(const USetAdder *)context;
60 sa->add(sa->set, start);
65 ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode) {
67 UChar32 c, start, limit;
69 const uint8_t *jgArray;
72 if(U_FAILURE(*pErrorCode)) {
76 /* add the start code point of each same-value range of the trie */
77 utrie2_enum(&bdp->trie, NULL, _enumPropertyStartsRange, sa);
79 /* add the code points from the bidi mirroring table */
80 length=bdp->indexes[UBIDI_IX_MIRROR_LENGTH];
81 for(i=0; i<length; ++i) {
82 c=UBIDI_GET_MIRROR_CODE_POINT(bdp->mirrors[i]);
83 sa->addRange(sa->set, c, c+1);
86 /* add the code points from the Joining_Group array where the value changes */
87 start=bdp->indexes[UBIDI_IX_JG_START];
88 limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
95 sa->add(sa->set, start);
101 /* add the limit code point if the last value was not 0 (it is now start==limit) */
102 sa->add(sa->set, limit);
104 if(limit==bdp->indexes[UBIDI_IX_JG_LIMIT]) {
105 /* switch to the second Joining_Group range */
106 start=bdp->indexes[UBIDI_IX_JG_START2];
107 limit=bdp->indexes[UBIDI_IX_JG_LIMIT2];
108 jgArray=bdp->jgArray2;
114 /* add code points with hardcoded properties, plus the ones following them */
116 /* (none right now) */
119 /* property access functions ------------------------------------------------ */
122 ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which) {
129 max=bdp->indexes[UBIDI_MAX_VALUES_INDEX];
131 case UCHAR_BIDI_CLASS:
132 return (max&UBIDI_CLASS_MASK);
133 case UCHAR_JOINING_GROUP:
134 return (max&UBIDI_MAX_JG_MASK)>>UBIDI_MAX_JG_SHIFT;
135 case UCHAR_JOINING_TYPE:
136 return (max&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT;
137 case UCHAR_BIDI_PAIRED_BRACKET_TYPE:
138 return (max&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT;
140 return -1; /* undefined */
144 U_CAPI UCharDirection
145 ubidi_getClass(const UBiDiProps *bdp, UChar32 c) {
146 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
147 return (UCharDirection)UBIDI_GET_CLASS(props);
151 ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c) {
152 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
153 return (UBool)UBIDI_GET_FLAG(props, UBIDI_IS_MIRRORED_SHIFT);
157 getMirror(const UBiDiProps *bdp, UChar32 c, uint16_t props) {
158 int32_t delta=UBIDI_GET_MIRROR_DELTA(props);
159 if(delta!=UBIDI_ESC_MIRROR_DELTA) {
162 /* look for mirror code point in the mirrors[] table */
163 const uint32_t *mirrors;
168 mirrors=bdp->mirrors;
169 length=bdp->indexes[UBIDI_IX_MIRROR_LENGTH];
172 for(i=0; i<length; ++i) {
174 c2=UBIDI_GET_MIRROR_CODE_POINT(m);
176 /* found c, return its mirror code point using the index in m */
177 return UBIDI_GET_MIRROR_CODE_POINT(mirrors[UBIDI_GET_MIRROR_INDEX(m)]);
183 /* c not found, return it itself */
189 ubidi_getMirror(const UBiDiProps *bdp, UChar32 c) {
190 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
191 return getMirror(bdp, c, props);
195 ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c) {
196 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
197 return (UBool)UBIDI_GET_FLAG(props, UBIDI_BIDI_CONTROL_SHIFT);
201 ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c) {
202 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
203 return (UBool)UBIDI_GET_FLAG(props, UBIDI_JOIN_CONTROL_SHIFT);
207 ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c) {
208 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
209 return (UJoiningType)((props&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT);
212 U_CFUNC UJoiningGroup
213 ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c) {
214 UChar32 start, limit;
216 start=bdp->indexes[UBIDI_IX_JG_START];
217 limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
218 if(start<=c && c<limit) {
219 return (UJoiningGroup)bdp->jgArray[c-start];
221 start=bdp->indexes[UBIDI_IX_JG_START2];
222 limit=bdp->indexes[UBIDI_IX_JG_LIMIT2];
223 if(start<=c && c<limit) {
224 return (UJoiningGroup)bdp->jgArray2[c-start];
226 return U_JG_NO_JOINING_GROUP;
229 U_CFUNC UBidiPairedBracketType
230 ubidi_getPairedBracketType(const UBiDiProps *bdp, UChar32 c) {
231 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
232 return (UBidiPairedBracketType)((props&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT);
236 ubidi_getPairedBracket(const UBiDiProps *bdp, UChar32 c) {
237 uint16_t props=UTRIE2_GET16(&bdp->trie, c);
238 if((props&UBIDI_BPT_MASK)==0) {
241 return getMirror(bdp, c, props);
245 /* public API (see uchar.h) ------------------------------------------------- */
247 U_CFUNC UCharDirection
248 u_charDirection(UChar32 c) {
249 return ubidi_getClass(&ubidi_props_singleton, c);
253 u_isMirrored(UChar32 c) {
254 return ubidi_isMirrored(&ubidi_props_singleton, c);
258 u_charMirror(UChar32 c) {
259 return ubidi_getMirror(&ubidi_props_singleton, c);
262 U_STABLE UChar32 U_EXPORT2
263 u_getBidiPairedBracket(UChar32 c) {
264 return ubidi_getPairedBracket(&ubidi_props_singleton, c);