Lines Matching refs:nv_isnull
251 return((np = nv_opensub(np)) && !nv_isnull(np));
766 if(!nv_isnull(np))
848 if((nv_isnull(np)||np->nvalue.cp==Empty) && nv_isattr(np,NV_NOFREE))
859 if(mp && nv_isnull(mp))
873 else if(nv_isattr(np,NV_INTEGER) && !nv_isnull(np))
993 if(nv_isnull(np) && nv_isattr(np,NV_NOFREE))
1722 if(!nv_isnull(ap->cur))
1746 if(!shp->instance && nv_isnull(ap->cur))
1765 if(sh.subshell && (mp=nv_search(sp,ap->header.table,0)) && nv_isnull(mp))
1767 if((mp || (mp=nv_search(sp,ap->header.table,mode))) && nv_isnull(mp) && (mode&NV_ADD))
1777 if(nv_isnull(mp))
1833 if(!nv_isnull(np) && np->nvalue.cp!=Empty)