forked from melod1n/fast-messenger
96 lines
2.5 KiB
Kotlin
96 lines
2.5 KiB
Kotlin
package com.meloda.fast.io
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import org.jetbrains.annotations.Contract
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import java.io.*
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import java.math.BigInteger
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object FileStreams {
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val lineSeparatorChar = lineSeparator()[0]
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const val ONE_KB = 1024
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const val ONE_MB = ONE_KB * 1024
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const val ONE_GB = ONE_MB * 1024
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const val ONE_TB = ONE_GB * 1024L
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const val ONE_PB = ONE_TB * 1024L
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const val ONE_EB = ONE_PB * 1024L
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val ONE_ZB: BigInteger = BigInteger.valueOf(ONE_EB).multiply(BigInteger.valueOf(1024L))
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val ONE_YB: BigInteger = ONE_ZB.multiply(BigInteger.valueOf(1024L))
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@Throws(IOException::class)
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fun read(from: File?): String {
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return EasyStreams.read(reader(from))
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}
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@Throws(IOException::class)
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fun write(from: String?, to: File?) {
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EasyStreams.write(from, writer(to))
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}
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@Throws(IOException::class)
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fun write(from: ByteArray?, to: File?) {
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EasyStreams.write(from, FileOutputStream(to))
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}
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@Throws(IOException::class)
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fun append(from: ByteArray?, to: File?) {
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EasyStreams.write(from, FileOutputStream(to, true))
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}
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@Throws(IOException::class)
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fun append(from: CharArray?, to: File?) {
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EasyStreams.write(from, FileWriter(to, true))
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}
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@Throws(IOException::class)
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fun append(from: CharSequence, to: File?) {
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EasyStreams.write(if (from is String) from else from.toString(), FileWriter(to, true))
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}
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fun delete(dir: File) {
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if (dir.isDirectory) {
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val files = dir.listFiles() ?: return
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for (file in files) {
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delete(file)
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}
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} else {
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dir.delete()
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}
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}
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fun lineSeparator(): String {
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return System.lineSeparator()
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}
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fun search(dir: File, name: String?): File? {
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require(dir.isDirectory) { "dir can't be file." }
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val files = dir.listFiles() ?: return null
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if (files.isEmpty()) {
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return null
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}
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for (file in files) {
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if (file.isDirectory) {
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search(file, name)
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} else if (file.name.contains(name!!)) {
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return file
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}
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}
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return null
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}
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@Contract("_ -> new")
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@Throws(FileNotFoundException::class)
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fun reader(from: File?): Reader {
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return InputStreamReader(FileInputStream(from), Charsets.UTF_8)
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}
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@Contract("_ -> new")
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@Throws(FileNotFoundException::class)
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fun writer(to: File?): Writer {
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return OutputStreamWriter(FileOutputStream(to), Charsets.UTF_8)
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}
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} |