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/*
*******************************************************************************
*
* Copyright (C) 2004-2006, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: ubidi_props.c
* encoding: US-ASCII
* 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 "umutex.h"
#include "uassert.h"
#include "cmemory.h"
#include "utrie.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;
UTrie trie;
uint8_t formatVersion[4];
};
/* data loading etc. -------------------------------------------------------- */
#define UBIDI_HARDCODE_DATA 1
#if UBIDI_HARDCODE_DATA
/* ubidi_props_data.c is machine-generated by genbidi --csource */
#include "ubidi_props_data.c"
#else
static UBool U_CALLCONV
isAcceptable(void *context,
const char *type, const char *name,
const UDataInfo *pInfo) {
if(
pInfo->size>=20 &&
pInfo->isBigEndian==U_IS_BIG_ENDIAN &&
pInfo->charsetFamily==U_CHARSET_FAMILY &&
pInfo->dataFormat[0]==UBIDI_FMT_0 && /* dataFormat="BiDi" */
pInfo->dataFormat[1]==UBIDI_FMT_1 &&
pInfo->dataFormat[2]==UBIDI_FMT_2 &&
pInfo->dataFormat[3]==UBIDI_FMT_3 &&
pInfo->formatVersion[0]==1 &&
pInfo->formatVersion[2]==UTRIE_SHIFT &&
pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT
) {
UBiDiProps *bdp=(UBiDiProps *)context;
uprv_memcpy(bdp->formatVersion, pInfo->formatVersion, 4);
return TRUE;
} else {
return FALSE;
}
}
static UBiDiProps *
ubidi_openData(UBiDiProps *bdpProto,
const uint8_t *bin, int32_t length, UErrorCode *pErrorCode) {
UBiDiProps *bdp;
int32_t size;
bdpProto->indexes=(const int32_t *)bin;
if( (length>=0 && length<16*4) ||
bdpProto->indexes[UBIDI_IX_INDEX_TOP]<16
) {
/* length or indexes[] too short for minimum indexes[] length of 16 */
*pErrorCode=U_INVALID_FORMAT_ERROR;
return NULL;
}
size=bdpProto->indexes[UBIDI_IX_INDEX_TOP]*4;
if(length>=0) {
if(length>=size && length>=bdpProto->indexes[UBIDI_IX_LENGTH]) {
length-=size;
} else {
/* length too short for indexes[] or for the whole data length */
*pErrorCode=U_INVALID_FORMAT_ERROR;
return NULL;
}
}
bin+=size;
/* from here on, assume that the sizes of the items fit into the total length */
/* unserialize the trie, after indexes[] */
size=bdpProto->indexes[UBIDI_IX_TRIE_SIZE];
utrie_unserialize(&bdpProto->trie, bin, size, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
bin+=size;
/* get mirrors[] */
size=4*bdpProto->indexes[UBIDI_IX_MIRROR_LENGTH];
bdpProto->mirrors=(const uint32_t *)bin;
bin+=size;
/* get jgArray[] */
size=bdpProto->indexes[UBIDI_IX_JG_LIMIT]-bdpProto->indexes[UBIDI_IX_JG_START];
bdpProto->jgArray=bin;
bin+=size;
/* allocate, copy, and return the new UBiDiProps */
bdp=(UBiDiProps *)uprv_malloc(sizeof(UBiDiProps));
if(bdp==NULL) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return NULL;
} else {
uprv_memcpy(bdp, bdpProto, sizeof(UBiDiProps));
return bdp;
}
}
U_CAPI UBiDiProps * U_EXPORT2
ubidi_openProps(UErrorCode *pErrorCode) {
UBiDiProps bdpProto={ NULL }, *bdp;
bdpProto.mem=udata_openChoice(NULL, UBIDI_DATA_TYPE, UBIDI_DATA_NAME, isAcceptable, &bdpProto, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
bdp=ubidi_openData(
&bdpProto,
udata_getMemory(bdpProto.mem),
udata_getLength(bdpProto.mem),
pErrorCode);
if(U_FAILURE(*pErrorCode)) {
udata_close(bdpProto.mem);
return NULL;
} else {
return bdp;
}
}
U_CAPI UBiDiProps * U_EXPORT2
ubidi_openBinary(const uint8_t *bin, int32_t length, UErrorCode *pErrorCode) {
UBiDiProps bdpProto={ NULL };
const DataHeader *hdr;
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
if(bin==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return NULL;
}
/* check the header */
if(length>=0 && length<20) {
*pErrorCode=U_INVALID_FORMAT_ERROR;
return NULL;
}
hdr=(const DataHeader *)bin;
if(
!(hdr->dataHeader.magic1==0xda && hdr->dataHeader.magic2==0x27 &&
hdr->info.isBigEndian==U_IS_BIG_ENDIAN &&
isAcceptable(&bdpProto, UBIDI_DATA_TYPE, UBIDI_DATA_NAME, &hdr->info))
) {
*pErrorCode=U_INVALID_FORMAT_ERROR;
return NULL;
}
bin+=hdr->dataHeader.headerSize;
if(length>=0) {
length-=hdr->dataHeader.headerSize;
}
return ubidi_openData(&bdpProto, bin, length, pErrorCode);
}
#endif
U_CAPI void U_EXPORT2
ubidi_closeProps(UBiDiProps *bdp) {
if(bdp!=NULL) {
#if !UBIDI_HARDCODE_DATA
udata_close(bdp->mem);
#endif
uprv_free(bdp);
}
}
/* UBiDiProps singleton ----------------------------------------------------- */
static UBiDiProps *gBdp=NULL, *gBdpDummy=NULL;
#if !UBIDI_HARDCODE_DATA
static UErrorCode gErrorCode=U_ZERO_ERROR;
static int8_t gHaveData=0;
#endif
static UBool U_CALLCONV
ubidi_cleanup(void) {
ubidi_closeProps(gBdp);
gBdp=NULL;
ubidi_closeProps(gBdpDummy);
gBdpDummy=NULL;
#if !UBIDI_HARDCODE_DATA
gErrorCode=U_ZERO_ERROR;
gHaveData=0;
#endif
return TRUE;
}
U_CAPI const UBiDiProps * U_EXPORT2
ubidi_getSingleton(UErrorCode *pErrorCode) {
#if UBIDI_HARDCODE_DATA
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
return &ubidi_props_singleton;
#else
int8_t haveData;
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
UMTX_CHECK(NULL, gHaveData, haveData);
if(haveData>0) {
/* data was loaded */
return gBdp;
} else if(haveData<0) {
/* data loading failed */
*pErrorCode=gErrorCode;
return NULL;
} else /* haveData==0 */ {
/* load the data */
UBiDiProps *bdp=ubidi_openProps(pErrorCode);
if(U_FAILURE(*pErrorCode)) {
gHaveData=-1;
gErrorCode=*pErrorCode;
return NULL;
}
/* set the static variables */
umtx_lock(NULL);
if(gBdp==NULL) {
gBdp=bdp;
bdp=NULL;
gHaveData=1;
ucln_common_registerCleanup(UCLN_COMMON_UBIDI, ubidi_cleanup);
}
umtx_unlock(NULL);
ubidi_closeProps(bdp);
return gBdp;
}
#endif
}
U_CAPI const UBiDiProps * U_EXPORT2
ubidi_getDummy(UErrorCode *pErrorCode) {
UBiDiProps *bdp;
if(U_FAILURE(*pErrorCode)) {
return NULL;
}
UMTX_CHECK(NULL, gBdpDummy, bdp);
if(bdp!=NULL) {
/* the dummy object was already created */
return bdp;
} else /* bdp==NULL */ {
/* create the dummy object */
int32_t *indexes;
bdp=(UBiDiProps *)uprv_malloc(sizeof(UBiDiProps)+UBIDI_IX_TOP*4+UTRIE_DUMMY_SIZE);
if(bdp==NULL) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
uprv_memset(bdp, 0, sizeof(UBiDiProps)+UBIDI_IX_TOP*4);
bdp->indexes=indexes=(int32_t *)(bdp+1);
indexes[UBIDI_IX_INDEX_TOP]=UBIDI_IX_TOP;
indexes[UBIDI_IX_TRIE_SIZE]=
utrie_unserializeDummy(&bdp->trie, indexes+UBIDI_IX_TOP, UTRIE_DUMMY_SIZE, 0, 0, TRUE, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
uprv_free(bdp);
return NULL;
}
bdp->formatVersion[0]=1;
bdp->formatVersion[2]=UTRIE_SHIFT;
bdp->formatVersion[3]=UTRIE_INDEX_SHIFT;
/* set the static variables */
umtx_lock(NULL);
if(gBdpDummy==NULL) {
gBdpDummy=bdp;
bdp=NULL;
ucln_common_registerCleanup(UCLN_COMMON_UBIDI, ubidi_cleanup);
}
umtx_unlock(NULL);
uprv_free(bdp);
return gBdpDummy;
}
}
/* set of property starts for UnicodeSet ------------------------------------ */
static UBool U_CALLCONV
_enumPropertyStartsRange(const void *context, UChar32 start, UChar32 limit, uint32_t value) {
/* add the start code point to the USet */
const USetAdder *sa=(const USetAdder *)context;
sa->add(sa->set, start);
return TRUE;
}
U_CAPI void U_EXPORT2
ubidi_addPropertyStarts(const UBiDiProps *bdp, 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 */
utrie_enum(&bdp->trie, NULL, _enumPropertyStartsRange, sa);
/* add the code points from the bidi mirroring table */
length=bdp->indexes[UBIDI_IX_MIRROR_LENGTH];
for(i=0; i<length; ++i) {
c=UBIDI_GET_MIRROR_CODE_POINT(bdp->mirrors[i]);
sa->addRange(sa->set, c, c+1);
}
/* add the code points from the Joining_Group array where the value changes */
start=bdp->indexes[UBIDI_IX_JG_START];
limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
jgArray=bdp->jgArray;
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);
}
/* add code points with hardcoded properties, plus the ones following them */
/* (none right now) */
}
/* data access primitives --------------------------------------------------- */
/* UTRIE_GET16() itself validates c */
#define GET_PROPS(bdp, c, result) \
UTRIE_GET16(&(bdp)->trie, c, result);
/* property access functions ------------------------------------------------ */
U_CFUNC int32_t
ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which) {
int32_t max;
if(bdp==NULL) {
return -1;
}
max=bdp->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;
default:
return -1; /* undefined */
}
}
U_CAPI UCharDirection U_EXPORT2
ubidi_getClass(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
GET_PROPS(bdp, c, props);
return (UCharDirection)UBIDI_GET_CLASS(props);
}
U_CAPI UBool U_EXPORT2
ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
GET_PROPS(bdp, c, props);
return (UBool)UBIDI_GET_FLAG(props, UBIDI_IS_MIRRORED_SHIFT);
}
U_CAPI UChar32 U_EXPORT2
ubidi_getMirror(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
int32_t delta;
GET_PROPS(bdp, c, props);
delta=((int16_t)props)>>UBIDI_MIRROR_DELTA_SHIFT;
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=bdp->mirrors;
length=bdp->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_CAPI UBool U_EXPORT2
ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
GET_PROPS(bdp, c, props);
return (UBool)UBIDI_GET_FLAG(props, UBIDI_BIDI_CONTROL_SHIFT);
}
U_CAPI UBool U_EXPORT2
ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
GET_PROPS(bdp, c, props);
return (UBool)UBIDI_GET_FLAG(props, UBIDI_JOIN_CONTROL_SHIFT);
}
U_CAPI UJoiningType U_EXPORT2
ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c) {
uint32_t props;
GET_PROPS(bdp, c, props);
return (UJoiningType)((props&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT);
}
U_CAPI UJoiningGroup U_EXPORT2
ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c) {
UChar32 start, limit;
start=bdp->indexes[UBIDI_IX_JG_START];
limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
if(start<=c && c<limit) {
return (UJoiningGroup)bdp->jgArray[c-start];
} else {
return U_JG_NO_JOINING_GROUP;
}
}
/* public API (see uchar.h) ------------------------------------------------- */
U_CAPI UCharDirection U_EXPORT2
u_charDirection(UChar32 c) {
UErrorCode errorCode=U_ZERO_ERROR;
const UBiDiProps *bdp=ubidi_getSingleton(&errorCode);
if(bdp!=NULL) {
return ubidi_getClass(bdp, c);
} else {
return U_LEFT_TO_RIGHT;
}
}
U_CAPI UBool U_EXPORT2
u_isMirrored(UChar32 c) {
UErrorCode errorCode=U_ZERO_ERROR;
const UBiDiProps *bdp=ubidi_getSingleton(&errorCode);
return (UBool)(bdp!=NULL && ubidi_isMirrored(bdp, c));
}
U_CAPI UChar32 U_EXPORT2
u_charMirror(UChar32 c) {
UErrorCode errorCode=U_ZERO_ERROR;
const UBiDiProps *bdp=ubidi_getSingleton(&errorCode);
if(bdp!=NULL) {
return ubidi_getMirror(bdp, c);
} else {
return c;
}
}
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