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/*
* Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
@file:Suppress("BlockingMethodInNonBlockingContext")
package me.msfjarvis.openpgpktx.util
import android.os.ParcelFileDescriptor
import android.os.ParcelFileDescriptor.AutoCloseInputStream
import android.os.ParcelFileDescriptor.AutoCloseOutputStream
import android.util.Log
import java.io.IOException
import java.io.InputStream
import java.io.OutputStream
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
internal object ParcelFileDescriptorUtil {
private const val TAG = "PFDUtils"
internal suspend fun pipeFrom(inputStream: InputStream): ParcelFileDescriptor {
val pipe = ParcelFileDescriptor.createPipe()
val readSide = pipe[0]
val writeSide = pipe[1]
transferStreams(inputStream, AutoCloseOutputStream(writeSide))
return readSide
}
internal suspend fun pipeTo(outputStream: OutputStream, output: ParcelFileDescriptor?) {
transferStreams(AutoCloseInputStream(output), outputStream)
}
private suspend fun transferStreams(`in`: InputStream, `out`: OutputStream) {
withContext(Dispatchers.IO) {
val buf = ByteArray(4096)
var len: Int
try {
while (`in`.read(buf).also { len = it } > 0) {
out.write(buf, 0, len)
}
} catch (e: IOException) {
Log.e(TAG, "IOException when writing to out", e)
} finally {
try {
`in`.close()
} catch (ignored: IOException) {}
try {
out.close()
} catch (ignored: IOException) {}
}
}
}
}
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