255 lines
7.3 KiB
C++
255 lines
7.3 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
*
|
|
* Copyright (C) 2004-2014, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*
|
|
*******************************************************************************
|
|
* file name: ubidi_props.c
|
|
* encoding: UTF-8
|
|
* tab size: 8 (not used)
|
|
* indentation:4
|
|
*
|
|
* created on: 2004dec30
|
|
* created by: Markus W. Scherer
|
|
*
|
|
* Low-level Unicode bidi/shaping properties access.
|
|
*/
|
|
|
|
#include "unicode/utypes.h"
|
|
#include "unicode/uset.h"
|
|
#include "unicode/udata.h" /* UDataInfo */
|
|
#include "ucmndata.h" /* DataHeader */
|
|
#include "udatamem.h"
|
|
#include "uassert.h"
|
|
#include "cmemory.h"
|
|
#include "utrie2.h"
|
|
#include "ubidi_props.h"
|
|
#include "ucln_cmn.h"
|
|
|
|
struct UBiDiProps {
|
|
UDataMemory *mem;
|
|
const int32_t *indexes;
|
|
const uint32_t *mirrors;
|
|
const uint8_t *jgArray;
|
|
const uint8_t *jgArray2;
|
|
|
|
UTrie2 trie;
|
|
uint8_t formatVersion[4];
|
|
};
|
|
|
|
/* ubidi_props_data.h is machine-generated by genbidi --csource */
|
|
#define INCLUDED_FROM_UBIDI_PROPS_C
|
|
#include "ubidi_props_data.h"
|
|
|
|
/* set of property starts for UnicodeSet ------------------------------------ */
|
|
|
|
static UBool U_CALLCONV
|
|
_enumPropertyStartsRange(const void *context, UChar32 start, UChar32 end, uint32_t value) {
|
|
(void)end;
|
|
(void)value;
|
|
/* add the start code point to the USet */
|
|
const USetAdder *sa=(const USetAdder *)context;
|
|
sa->add(sa->set, start);
|
|
return true;
|
|
}
|
|
|
|
U_CFUNC void
|
|
ubidi_addPropertyStarts(const USetAdder *sa, UErrorCode *pErrorCode) {
|
|
int32_t i, length;
|
|
UChar32 c, start, limit;
|
|
|
|
const uint8_t *jgArray;
|
|
uint8_t prev, jg;
|
|
|
|
if(U_FAILURE(*pErrorCode)) {
|
|
return;
|
|
}
|
|
|
|
/* add the start code point of each same-value range of the trie */
|
|
utrie2_enum(&ubidi_props_singleton.trie, NULL, _enumPropertyStartsRange, sa);
|
|
|
|
/* add the code points from the bidi mirroring table */
|
|
length=ubidi_props_singleton.indexes[UBIDI_IX_MIRROR_LENGTH];
|
|
for(i=0; i<length; ++i) {
|
|
c=UBIDI_GET_MIRROR_CODE_POINT(ubidi_props_singleton.mirrors[i]);
|
|
sa->addRange(sa->set, c, c+1);
|
|
}
|
|
|
|
/* add the code points from the Joining_Group array where the value changes */
|
|
start=ubidi_props_singleton.indexes[UBIDI_IX_JG_START];
|
|
limit=ubidi_props_singleton.indexes[UBIDI_IX_JG_LIMIT];
|
|
jgArray=ubidi_props_singleton.jgArray;
|
|
for(;;) {
|
|
prev=0;
|
|
while(start<limit) {
|
|
jg=*jgArray++;
|
|
if(jg!=prev) {
|
|
sa->add(sa->set, start);
|
|
prev=jg;
|
|
}
|
|
++start;
|
|
}
|
|
if(prev!=0) {
|
|
/* add the limit code point if the last value was not 0 (it is now start==limit) */
|
|
sa->add(sa->set, limit);
|
|
}
|
|
if(limit==ubidi_props_singleton.indexes[UBIDI_IX_JG_LIMIT]) {
|
|
/* switch to the second Joining_Group range */
|
|
start=ubidi_props_singleton.indexes[UBIDI_IX_JG_START2];
|
|
limit=ubidi_props_singleton.indexes[UBIDI_IX_JG_LIMIT2];
|
|
jgArray=ubidi_props_singleton.jgArray2;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* add code points with hardcoded properties, plus the ones following them */
|
|
|
|
/* (none right now) */
|
|
}
|
|
|
|
/* property access functions ------------------------------------------------ */
|
|
|
|
U_CFUNC int32_t
|
|
ubidi_getMaxValue(UProperty which) {
|
|
int32_t max=ubidi_props_singleton.indexes[UBIDI_MAX_VALUES_INDEX];
|
|
switch(which) {
|
|
case UCHAR_BIDI_CLASS:
|
|
return (max&UBIDI_CLASS_MASK);
|
|
case UCHAR_JOINING_GROUP:
|
|
return (max&UBIDI_MAX_JG_MASK)>>UBIDI_MAX_JG_SHIFT;
|
|
case UCHAR_JOINING_TYPE:
|
|
return (max&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT;
|
|
case UCHAR_BIDI_PAIRED_BRACKET_TYPE:
|
|
return (max&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT;
|
|
default:
|
|
return -1; /* undefined */
|
|
}
|
|
}
|
|
|
|
U_CAPI UCharDirection
|
|
ubidi_getClass(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UCharDirection)UBIDI_GET_CLASS(props);
|
|
}
|
|
|
|
U_CFUNC UBool
|
|
ubidi_isMirrored(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UBool)UBIDI_GET_FLAG(props, UBIDI_IS_MIRRORED_SHIFT);
|
|
}
|
|
|
|
static UChar32
|
|
getMirror(UChar32 c, uint16_t props) {
|
|
int32_t delta=UBIDI_GET_MIRROR_DELTA(props);
|
|
if(delta!=UBIDI_ESC_MIRROR_DELTA) {
|
|
return c+delta;
|
|
} else {
|
|
/* look for mirror code point in the mirrors[] table */
|
|
const uint32_t *mirrors;
|
|
uint32_t m;
|
|
int32_t i, length;
|
|
UChar32 c2;
|
|
|
|
mirrors=ubidi_props_singleton.mirrors;
|
|
length=ubidi_props_singleton.indexes[UBIDI_IX_MIRROR_LENGTH];
|
|
|
|
/* linear search */
|
|
for(i=0; i<length; ++i) {
|
|
m=mirrors[i];
|
|
c2=UBIDI_GET_MIRROR_CODE_POINT(m);
|
|
if(c==c2) {
|
|
/* found c, return its mirror code point using the index in m */
|
|
return UBIDI_GET_MIRROR_CODE_POINT(mirrors[UBIDI_GET_MIRROR_INDEX(m)]);
|
|
} else if(c<c2) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* c not found, return it itself */
|
|
return c;
|
|
}
|
|
}
|
|
|
|
U_CFUNC UChar32
|
|
ubidi_getMirror(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return getMirror(c, props);
|
|
}
|
|
|
|
U_CFUNC UBool
|
|
ubidi_isBidiControl(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UBool)UBIDI_GET_FLAG(props, UBIDI_BIDI_CONTROL_SHIFT);
|
|
}
|
|
|
|
U_CFUNC UBool
|
|
ubidi_isJoinControl(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UBool)UBIDI_GET_FLAG(props, UBIDI_JOIN_CONTROL_SHIFT);
|
|
}
|
|
|
|
U_CFUNC UJoiningType
|
|
ubidi_getJoiningType(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UJoiningType)((props&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT);
|
|
}
|
|
|
|
U_CFUNC UJoiningGroup
|
|
ubidi_getJoiningGroup(UChar32 c) {
|
|
UChar32 start, limit;
|
|
|
|
start=ubidi_props_singleton.indexes[UBIDI_IX_JG_START];
|
|
limit=ubidi_props_singleton.indexes[UBIDI_IX_JG_LIMIT];
|
|
if(start<=c && c<limit) {
|
|
return (UJoiningGroup)ubidi_props_singleton.jgArray[c-start];
|
|
}
|
|
start=ubidi_props_singleton.indexes[UBIDI_IX_JG_START2];
|
|
limit=ubidi_props_singleton.indexes[UBIDI_IX_JG_LIMIT2];
|
|
if(start<=c && c<limit) {
|
|
return (UJoiningGroup)ubidi_props_singleton.jgArray2[c-start];
|
|
}
|
|
return U_JG_NO_JOINING_GROUP;
|
|
}
|
|
|
|
U_CFUNC UBidiPairedBracketType
|
|
ubidi_getPairedBracketType(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
return (UBidiPairedBracketType)((props&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT);
|
|
}
|
|
|
|
U_CFUNC UChar32
|
|
ubidi_getPairedBracket(UChar32 c) {
|
|
uint16_t props=UTRIE2_GET16(&ubidi_props_singleton.trie, c);
|
|
if((props&UBIDI_BPT_MASK)==0) {
|
|
return c;
|
|
} else {
|
|
return getMirror(c, props);
|
|
}
|
|
}
|
|
|
|
/* public API (see uchar.h) ------------------------------------------------- */
|
|
|
|
U_CFUNC UCharDirection
|
|
u_charDirection(UChar32 c) {
|
|
return ubidi_getClass(c);
|
|
}
|
|
|
|
U_CFUNC UBool
|
|
u_isMirrored(UChar32 c) {
|
|
return ubidi_isMirrored(c);
|
|
}
|
|
|
|
U_CFUNC UChar32
|
|
u_charMirror(UChar32 c) {
|
|
return ubidi_getMirror(c);
|
|
}
|
|
|
|
U_CAPI UChar32 U_EXPORT2
|
|
u_getBidiPairedBracket(UChar32 c) {
|
|
return ubidi_getPairedBracket(c);
|
|
}
|