72 lines
2.2 KiB
Kotlin
72 lines
2.2 KiB
Kotlin
/*
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* Copyright 2017 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.msgpack.types
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import ch.dissem.msgpack.types.Utils.bytes
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import java.io.IOException
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import java.io.InputStream
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import java.io.OutputStream
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import java.nio.ByteBuffer
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/**
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* Representation of a msgpack encoded float32 or float64 number.
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*/
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data class MPFloat(override val value: Double, val precision: Precision) : MPType<Double> {
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enum class Precision {
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FLOAT32, FLOAT64
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}
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constructor(value: Float) : this(value.toDouble(), Precision.FLOAT32)
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constructor(value: Double) : this(value, Precision.FLOAT64)
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@Throws(IOException::class)
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override fun pack(out: OutputStream) {
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when (precision) {
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MPFloat.Precision.FLOAT32 -> {
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out.write(0xCA)
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out.write(ByteBuffer.allocate(4).putFloat(value.toFloat()).array())
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}
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MPFloat.Precision.FLOAT64 -> {
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out.write(0xCB)
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out.write(ByteBuffer.allocate(8).putDouble(value).array())
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}
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}
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}
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override fun toString(): String {
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return value.toString()
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}
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override fun toJson(): String {
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return value.toString()
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}
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class Unpacker : MPType.Unpacker<MPFloat> {
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override fun doesUnpack(firstByte: Int): Boolean {
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return firstByte == 0xCA || firstByte == 0xCB
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}
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@Throws(IOException::class)
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override fun unpack(firstByte: Int, input: InputStream) = when (firstByte) {
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0xCA -> MPFloat(bytes(input, 4).float)
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0xCB -> MPFloat(bytes(input, 8).double)
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else -> throw IllegalArgumentException(String.format("Unexpected first byte 0x%02x", firstByte))
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}
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}
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}
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