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// 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.
package arrow
import (
"unsafe"
"github.com/apache/arrow-go/v18/arrow/decimal"
"github.com/apache/arrow-go/v18/arrow/endian"
)
// Decimal128 traits
var Decimal128Traits decimal128Traits
const (
// Decimal128SizeBytes specifies the number of bytes required to store a single decimal128 in memory
Decimal128SizeBytes = int(unsafe.Sizeof(decimal.Decimal128{}))
)
type decimal128Traits struct{}
// BytesRequired returns the number of bytes required to store n elements in memory.
func (decimal128Traits) BytesRequired(n int) int { return Decimal128SizeBytes * n }
// PutValue
func (decimal128Traits) PutValue(b []byte, v decimal.Decimal128) {
endian.Native.PutUint64(b[:8], uint64(v.LowBits()))
endian.Native.PutUint64(b[8:], uint64(v.HighBits()))
}
// CastFromBytes reinterprets the slice b to a slice of type uint16.
//
// NOTE: len(b) must be a multiple of Uint16SizeBytes.
func (decimal128Traits) CastFromBytes(b []byte) []decimal.Decimal128 {
return GetData[decimal.Decimal128](b)
}
// CastToBytes reinterprets the slice b to a slice of bytes.
func (decimal128Traits) CastToBytes(b []decimal.Decimal128) []byte {
return GetBytes(b)
}
// Copy copies src to dst.
func (decimal128Traits) Copy(dst, src []decimal.Decimal128) { copy(dst, src) }
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