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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 array
import (
"fmt"
"strings"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/float16"
"github.com/apache/arrow-go/v18/internal/json"
)
// A type which represents an immutable sequence of Float16 values.
type Float16 struct {
array
values []float16.Num
}
func NewFloat16Data(data arrow.ArrayData) *Float16 {
a := &Float16{}
a.refCount = 1
a.setData(data.(*Data))
return a
}
func (a *Float16) Value(i int) float16.Num { return a.values[i] }
func (a *Float16) ValueStr(i int) string {
if a.IsNull(i) {
return NullValueStr
}
return a.Value(i).String()
}
func (a *Float16) Values() []float16.Num { return a.values }
func (a *Float16) String() string {
o := new(strings.Builder)
o.WriteString("[")
for i := 0; i < a.Len(); i++ {
if i > 0 {
fmt.Fprintf(o, " ")
}
switch {
case a.IsNull(i):
o.WriteString(NullValueStr)
default:
fmt.Fprintf(o, "%v", a.values[i].Float32())
}
}
o.WriteString("]")
return o.String()
}
func (a *Float16) setData(data *Data) {
a.array.setData(data)
vals := data.buffers[1]
if vals != nil {
a.values = arrow.Float16Traits.CastFromBytes(vals.Bytes())
beg := a.array.data.offset
end := beg + a.array.data.length
a.values = a.values[beg:end]
}
}
func (a *Float16) GetOneForMarshal(i int) interface{} {
if a.IsValid(i) {
return a.values[i].Float32()
}
return nil
}
func (a *Float16) MarshalJSON() ([]byte, error) {
vals := make([]interface{}, a.Len())
for i, v := range a.values {
if !a.IsValid(i) {
vals[i] = nil
continue
}
switch {
case v.IsNaN():
vals[i] = "NaN"
case v.IsInf() && !v.Signbit():
vals[i] = "+Inf"
case v.IsInf() && v.Signbit():
vals[i] = "-Inf"
default:
vals[i] = v.Float32()
}
}
return json.Marshal(vals)
}
func arrayEqualFloat16(left, right *Float16) bool {
for i := 0; i < left.Len(); i++ {
if left.IsNull(i) {
continue
}
if left.Value(i) != right.Value(i) {
return false
}
}
return true
}
var (
_ arrow.Array = (*Float16)(nil)
)
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