U_CAPI UBiDi * U_EXPORT2
ubidi_openSized(int32_t maxLength, int32_t maxRunCount, UErrorCode *pErrorCode) {
UBiDi *pBiDi;
/* check the argument values */
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return NULL;
} else if(maxLength<0 || maxRunCount<0) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return NULL; /* invalid arguments */
}
/* allocate memory for the object */
pBiDi=(UBiDi *)icu_malloc(sizeof(UBiDi));
if(pBiDi==NULL) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
/* reset the object, all pointers NULL, all flags FALSE, all sizes 0 */
icu_memset(pBiDi, 0, sizeof(UBiDi));
/* allocate memory for arrays as requested */
if(maxLength>0) {
if( !getInitialDirPropsMemory(pBiDi, maxLength) ||
!getInitialLevelsMemory(pBiDi, maxLength)
) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
}
} else {
pBiDi->mayAllocateText=TRUE;
}
if(maxRunCount>0) {
if(maxRunCount==1) {
/* use simpleRuns[] */
pBiDi->runsSize=sizeof(Run);
} else if(!getInitialRunsMemory(pBiDi, maxRunCount)) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
}
} else {
pBiDi->mayAllocateRuns=TRUE;
}
if(U_SUCCESS(*pErrorCode)) {
return pBiDi;
} else {
ubidi_close(pBiDi);
return NULL;
}
}
U_CAPI const UBiDiLevel * U_EXPORT2
ubidi_getLevels(UBiDi *pBiDi, UErrorCode *pErrorCode) {
int32_t start, length;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return NULL;
} else if(pBiDi==NULL || (length=pBiDi->length)<=0) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return NULL;
}
if((start=pBiDi->trailingWSStart)==length) {
/* the current levels array reflects the WS run */
return pBiDi->levels;
}
/*
* After the previous if(), we know that the levels array
* has an implicit trailing WS run and therefore does not fully
* reflect itself all the levels.
* This must be a UBiDi object for a line, and
* we need to create a new levels array.
*/
if(getLevelsMemory(pBiDi, length)) {
UBiDiLevel *levels=pBiDi->levelsMemory;
if(start>0 && levels!=pBiDi->levels) {
icu_memcpy(levels, pBiDi->levels, start);
}
icu_memset(levels+start, pBiDi->paraLevel, length-start);
/* this new levels array is set for the line and reflects the WS run */
pBiDi->trailingWSStart=length;
return pBiDi->levels=levels;
} else {
/* out of memory */
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
}
