/
fieldref_hash.go
39 lines (33 loc) · 1.2 KB
/
fieldref_hash.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build go1.20 || tinygo
package compute
import (
"hash/maphash"
"math/bits"
"unsafe"
"github.com/apache/arrow/go/v17/arrow"
)
func (f FieldPath) hash(h *maphash.Hash) {
raw := unsafe.Pointer(unsafe.SliceData(f))
var byteLen int
if bits.UintSize == 32 {
byteLen = arrow.Int32Traits.BytesRequired(len(f))
} else {
byteLen = arrow.Int64Traits.BytesRequired(len(f))
}
h.Write(unsafe.Slice((*byte)(raw), byteLen))
}