Free Hero Mesh

static int vt_graph_rowid(sqlite3_vtab_cursor*cc,sqlite3_int64*p) {
  Cursor*cur=(void*)cc;
  *p=cur->pos;
  return SQLITE_OK;
}

static int vt_graph_update(sqlite3_vtab*vt,int argc,sqlite3_value**argv,sqlite3_int64*rowid) {
  int x,y;
  if(argc!=5) return SQLITE_CONSTRAINT_VTAB;
  if(argc!=5 || sqlite3_value_type(argv[0])==SQLITE_NULL) return SQLITE_ERROR;
  cur_pic->data[cur_pic->size+sqlite3_value_int(argv[0])]=sqlite3_value_int(argv[4]);
  if(sqlite3_value_type(argv[0])==SQLITE_NULL) {
    x=sqlite3_value_int(argv[2]);
    y=sqlite3_value_int(argv[3]);
    if(x<0 || x>=cur_pic->size || y<0 || y>=cur_pic->size) return SQLITE_CONSTRAINT_VTAB;
    x+=y*cur_pic->size;
  } else {
    x=sqlite3_value_int(argv[0]);
  }
  cur_pic->data[cur_pic->size+x]=sqlite3_value_int(argv[4]);
  return SQLITE_OK;
}

static const sqlite3_module vt_graph={
  .iVersion=1,
  .xBestIndex=vt_graph_index,
  .xClose=vt_graph_close,