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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 (
"math"
"unsafe"
"github.com/apache/arrow-go/v18/arrow/endian"
)
var (
{{range .In}}
{{.Name}}Traits {{.name}}Traits
{{- end}}
)
{{range .In}}
// {{.Name}} traits
const (
// {{.Name}}SizeBytes specifies the number of bytes required to store a single {{.Type}} in memory
{{.Name}}SizeBytes = int(unsafe.Sizeof({{.Type}}({{.Default}})))
)
type {{.name}}Traits struct{}
// BytesRequired returns the number of bytes required to store n elements in memory.
func ({{.name}}Traits) BytesRequired(n int) int { return {{.Name}}SizeBytes * n }
// PutValue
func ({{.name}}Traits) PutValue(b []byte, v {{.Type}}) {
{{- if eq .Type "float32" -}}
endian.Native.PutUint32(b, math.Float32bits(v))
{{- else if eq .Type "float64" -}}
endian.Native.PutUint64(b, math.Float64bits(v))
{{- else if eq .Size "1" -}}
b[0] = byte(v)
{{- else if eq .Size "2" -}}
endian.Native.PutUint16(b, uint16(v))
{{- else if eq .Size "4" -}}
endian.Native.PutUint32(b, uint32(v))
{{- else if eq .Size "8" -}}
endian.Native.PutUint64(b, uint64(v))
{{- else -}}
panic("invalid type {{.Type}}")
{{end}}
}
// CastFromBytes reinterprets the slice b to a slice of type {{.Type}}.
//
// NOTE: len(b) must be a multiple of {{.Name}}SizeBytes.
func ({{.name}}Traits) CastFromBytes(b []byte) []{{.Type}} {
return GetData[{{.Type}}](b)
}
// CastToBytes reinterprets the slice b to a slice of bytes.
func ({{.name}}Traits) CastToBytes(b []{{.Type}}) []byte {
return GetBytes(b)
}
// Copy copies src to dst.
func ({{.name}}Traits) Copy(dst, src []{{.Type}}) { copy(dst, src) }
{{end}}
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