// ListCFs lists the names of the column families in the DB.
func ListCFs(opts *Options, name string) ([]string, error) {
cName := C.CString(name)
defer C.free(unsafe.Pointer(cName))
var cLen C.size_t
var cErr *C.char
cNames := C.rocksdb_list_column_families(opts.c, cName, &cLen, &cErr)
if cErr != nil {
return nil, convertErr(cErr)
}
namesLen := int(cLen)
names := make([]string, namesLen)
cNamesArr := (*[1 << 30]*C.char)(unsafe.Pointer(cNames))[:namesLen:namesLen]
for i, n := range cNamesArr {
names[i] = C.GoString(n)
}
C.rocksdb_list_column_families_destroy(cNames, cLen)
return names, nil
}
// ListColumnFamilies lists all the column families in the database specified at name.
func ListColumnFamilies(dbOpts *Options, name string) ([]string, error) {
var len C.size_t
var cErr *C.char
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
cfs := C.rocksdb_list_column_families(dbOpts.c, cname, &len, &cErr)
if cErr != nil {
defer C.free(unsafe.Pointer(cErr))
return nil, errors.New(C.GoString(cErr))
}
hdr := reflect.SliceHeader{Data: uintptr(unsafe.Pointer(cfs)), Len: int(len), Cap: int(len)}
cfSlice := *(*[]*C.char)(unsafe.Pointer(&hdr))
names := make([]string, int(len))
for i, nameChar := range cfSlice {
names[i] = string(C.GoString(nameChar))
}
C.rocksdb_list_column_families_destroy(cfs, len)
return names, nil
}