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owenclave / app/src/main/java/com/github/shadowsocks/plugin/PluginOptions.kt
/******************************************************************************
* *
* Copyright (C) 2021 by nekohasekai *
* Copyright (C) 2021 by Max Lv *
* Copyright (C) 2021 by Mygod Studio *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see . *
* *
******************************************************************************/
package com.github.shadowsocks.plugin
import java.util.*
/**
* Helper class for processing plugin options.
*
* Based on: https://github.com/apache/ant/blob/588ce1f/src/main/org/apache/tools/ant/types/Commandline.java
*/
class PluginOptions : HashMap {
var id = ""
constructor() : super()
constructor(initialCapacity: Int) : super(initialCapacity)
constructor(initialCapacity: Int, loadFactor: Float) : super(initialCapacity, loadFactor)
private constructor(options: String?, parseId: Boolean) : this() {
@Suppress("NAME_SHADOWING")
var parseId = parseId
if (options.isNullOrEmpty()) return
check(options.all { !it.isISOControl() }) { "No control characters allowed." }
val tokenizer = StringTokenizer("$options;", "\\=;", true)
val current = StringBuilder()
var key: String? = null
while (tokenizer.hasMoreTokens()) when (val nextToken = tokenizer.nextToken()) {
"\\" -> current.append(tokenizer.nextToken())
"=" -> if (key == null) {
key = current.toString()
current.setLength(0)
} else current.append(nextToken)
";" -> {
if (key != null) {
put(key, current.toString())
key = null
} else if (current.isNotEmpty()) {
if (parseId) id = current.toString() else put(current.toString(), null)
}
current.setLength(0)
parseId = false
}
else -> current.append(nextToken)
}
}
constructor(options: String?) : this(options, true)
constructor(id: String, options: String?) : this(options, false) {
this.id = id
}
/**
* Put but if value is null or default, the entry is deleted.
*
* @return Old value before put.
*/
fun putWithDefault(key: String, value: String?, default: String? = null) =
if (value == null || value == default) remove(key) else put(key, value)
private fun append(result: StringBuilder, str: String) = str.indices.map { str[it] }.forEach {
when (it) {
'\\', '=', ';' -> {
result.append('\\') // intentionally no break
result.append(it)
}
else -> result.append(it)
}
}
fun toString(trimId: Boolean): String {
val result = StringBuilder()
if (!trimId) if (id.isEmpty()) return "" else append(result, id)
for ((key, value) in entries) {
if (result.isNotEmpty()) result.append(';')
append(result, key)
if (value != null) {
result.append('=')
append(result, value)
}
}
return result.toString()
}
override fun toString(): String = toString(true)
override fun equals(other: Any?): Boolean {
if (this === other) return true
return javaClass == other?.javaClass && super.equals(other) && id == (other as PluginOptions).id
}
override fun hashCode(): Int = Objects.hash(super.hashCode(), id)
}