int main(int argc, const char * argv[])
{
ISAutoreleasePoolPush();
/* create a mutable string */
ISMutableStringRef mutableString = ISStringCreateMutable("hello world", ISASCIIStringEncoding);
/* retain + 1 */
ISRetain(mutableString);
/* mutable string length */
int length = ISStringLength(mutableString);
printf("length %i\n", length);
/* make a non mutable copy */
ISStringRef otherString = ISCopy(mutableString);
printf("%s\n", ISStringCString(otherString));
ISRelease(otherString);
/* replace chars, only works on mutable */
ISStringReplaceChar(mutableString, 'l', 'x');
printf("%s\n", ISStringCString(mutableString));
/* release mutable string */
ISRelease(mutableString);
ISAutorelease(mutableString);
ISAutoreleasePoolPop();
return 0;
}
static PetscErrorCode VecNestSetSubVec_Private(Vec X,PetscInt idxm,Vec x)
{
Vec_Nest *bx = (Vec_Nest*)X->data;
PetscInt i,offset=0,n=0,bs;
IS is;
PetscErrorCode ierr;
PetscBool issame = PETSC_FALSE;
PetscInt N=0;
/* check if idxm < bx->nb */
if (idxm >= bx->nb) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Out of range index value %D maximum %D",idxm,bx->nb);
PetscFunctionBegin;
ierr = VecDestroy(&bx->v[idxm]);CHKERRQ(ierr); /* destroy the existing vector */
ierr = VecDuplicate(x,&bx->v[idxm]);CHKERRQ(ierr); /* duplicate the layout of given vector */
ierr = VecCopy(x,bx->v[idxm]);CHKERRQ(ierr); /* copy the contents of the given vector */
/* check if we need to update the IS for the block */
offset = X->map->rstart;
for (i=0; i<idxm; i++) {
n=0;
ierr = VecGetLocalSize(bx->v[i],&n);CHKERRQ(ierr);
offset += n;
}
/* get the local size and block size */
ierr = VecGetLocalSize(x,&n);CHKERRQ(ierr);
ierr = VecGetBlockSize(x,&bs);CHKERRQ(ierr);
/* create the new IS */
ierr = ISCreateStride(PetscObjectComm((PetscObject)x),n,offset,1,&is);CHKERRQ(ierr);
ierr = ISSetBlockSize(is,bs);CHKERRQ(ierr);
/* check if they are equal */
ierr = ISEqual(is,bx->is[idxm],&issame);CHKERRQ(ierr);
if (!issame) {
/* The IS of given vector has a different layout compared to the existing block vector.
Destroy the existing reference and update the IS. */
ierr = ISDestroy(&bx->is[idxm]);CHKERRQ(ierr);
ierr = ISDuplicate(is,&bx->is[idxm]);CHKERRQ(ierr);
ierr = ISCopy(is,bx->is[idxm]);CHKERRQ(ierr);
offset += n;
/* Since the current IS[idxm] changed, we need to update all the subsequent IS */
for (i=idxm+1; i<bx->nb; i++) {
/* get the local size and block size */
ierr = VecGetLocalSize(bx->v[i],&n);CHKERRQ(ierr);
ierr = VecGetBlockSize(bx->v[i],&bs);CHKERRQ(ierr);
/* destroy the old and create the new IS */
ierr = ISDestroy(&bx->is[i]);CHKERRQ(ierr);
ierr = ISCreateStride(((PetscObject)bx->v[i])->comm,n,offset,1,&bx->is[i]);CHKERRQ(ierr);
ierr = ISSetBlockSize(bx->is[i],bs);CHKERRQ(ierr);
offset += n;
}
n=0;
ierr = VecSize_Nest_Recursive(X,PETSC_TRUE,&N);CHKERRQ(ierr);
ierr = VecSize_Nest_Recursive(X,PETSC_FALSE,&n);CHKERRQ(ierr);
ierr = PetscLayoutSetSize(X->map,N);CHKERRQ(ierr);
ierr = PetscLayoutSetLocalSize(X->map,n);CHKERRQ(ierr);
}
ierr = ISDestroy(&is);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
void PETSC_STDCALL iscopy_(IS is,IS isy, int *__ierr ){
*__ierr = ISCopy(
(IS)PetscToPointer((is) ),
(IS)PetscToPointer((isy) ));
}