func (db *DB) SetTile(x uint64, y uint64, data []byte) error {
rc := C.tc_set_tile(db.db, C.uint64_t(x), C.uint64_t(y), unsafe.Pointer(&data[0]), C.size_t(len(data)))
if 0 != rc {
errCStr := C.tc_last_error(db.db)
return errors.New(C.GoString(errCStr))
}
return nil
}
func NewDB(path string, mmappool int) (*DB, error) {
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
db := &DB{}
db.db = C.tc_new_db(cpath, C.int(mmappool))
if 0 == C.tc_db_ok(db.db) {
errCStr := C.tc_last_error(db.db)
return nil, errors.New(C.GoString(errCStr))
}
runtime.SetFinalizer(db, func(obj interface{}) { obj.(*DB).Free() })
return db, nil
}
func (db *DB) GetTiles(zoom uint16, x uint64, y uint64) (tiles [][]byte, err error) {
var pData unsafe.Pointer
var pTiles *C.struct_tc_tile
var lTiles C.size_t
rc := C.tc_get_tiles(db.db, C.uint16_t(zoom), C.uint64_t(x), C.uint64_t(y), &pData, &pTiles, &lTiles)
if 0 != rc {
errCStr := C.tc_last_error(db.db)
err = errors.New(C.GoString(errCStr))
return
}
for i := uint(0); i < uint(lTiles); i++ {
tilePointer := C.tile_at_pos(pTiles, C.size_t(i))
dataPointer := C.data_at_offset(pData, C.size_t(tilePointer.offset))
data := C.GoBytes(dataPointer, C.int(tilePointer.size))
tiles = append(tiles, data)
}
return
}