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|
/* ___ ____ ___ __ ___ ___
** / _// __// _ | / / / _ | / _ \ Scala classfile decoder
** __\ \/ /__/ __ |/ /__/ __ |/ ___/ (c) 2003-2013, LAMP/EPFL
** /____/\___/_/ |_/____/_/ |_/_/ http://scala-lang.org/
**
*/
package scala.tools.scalap
import scala.collection.mutable
import mutable.{ Buffer, ListBuffer }
object Arguments {
case class Parser(optionPrefix: Char) {
val options: mutable.Set[String] = new mutable.HashSet
val prefixes: mutable.Set[String] = new mutable.HashSet
val optionalArgs: mutable.Set[String] = new mutable.HashSet
val prefixedBindings: mutable.Map[String, Char] = new mutable.HashMap
val optionalBindings: mutable.Map[String, Char] = new mutable.HashMap
def argumentError(message: String): Unit = Console.println(message)
def withOption(option: String): Parser = {
options += option
this
}
def withOptionalArg(option: String): Parser = {
optionalArgs += option
this
}
def withOptionalBinding(option: String, separator: Char): Parser = {
optionalBindings(option) = separator
this
}
def withPrefixedArg(prefix: String): Parser = {
prefixes += prefix
this
}
def withPrefixedBinding(prefix: String, separator: Char): Parser = {
prefixedBindings(prefix) = separator
this
}
def parseBinding(str: String, separator: Char): (String, String) = (str indexOf separator) match {
case -1 => argumentError("missing '" + separator + "' in binding '" + str + "'") ; Pair("", "")
case idx => Pair((str take idx).trim, (str drop (idx + 1)).trim)
}
def parse(args: Array[String]): Arguments = {
val res = new Arguments
parse(args, res)
res
}
def parse(args: Array[String], res: Arguments) {
if (args != null) {
var i = 0
while (i < args.length)
if ((args(i) == null) || (args(i).length() == 0))
i += 1
else if (args(i).charAt(0) != optionPrefix) {
res.addOther(args(i))
i += 1
} else if (options(args(i))) {
res.addOption(args(i))
i += 1
} else if (optionalArgs contains args(i)) {
if ((i + 1) == args.length) {
argumentError("missing argument for '" + args(i) + "'")
i += 1
} else {
res.addArgument(args(i), args(i + 1))
i += 2
}
} else if (optionalBindings contains args(i)) {
if ((i + 1) == args.length) {
argumentError("missing argument for '" + args(i) + "'")
i += 1
} else {
res.addBinding(args(i),
parseBinding(args(i + 1), optionalBindings(args(i))));
i += 2
}
} else {
val iter = prefixes.iterator
val j = i
while ((i == j) && iter.hasNext) {
val prefix = iter.next
if (args(i) startsWith prefix) {
res.addPrefixed(prefix, args(i).substring(prefix.length()).trim());
i += 1
}
}
if (i == j) {
val iter = prefixedBindings.keysIterator;
while ((i == j) && iter.hasNext) {
val prefix = iter.next
if (args(i) startsWith prefix) {
val arg = args(i).substring(prefix.length()).trim()
i = i + 1
res.addBinding(prefix,
parseBinding(arg, prefixedBindings(prefix)));
}
}
if (i == j) {
argumentError("unknown option '" + args(i) + "'")
i = i + 1
}
}
}
}
}
}
def parse(options: String*)(args: Array[String]): Arguments = {
val parser = new Parser('-')
options foreach (parser withOption _)
parser parse args
}
}
class Arguments {
private val options = new mutable.HashSet[String]
private val arguments = new mutable.HashMap[String, String]
private val prefixes = new mutable.HashMap[String, mutable.HashSet[String]]
private val bindings = new mutable.HashMap[String, mutable.HashMap[String, String]]
private val others = new ListBuffer[String]
def addOption(option: String): Unit = options += option
def addArgument(option: String, arg: String): Unit = arguments(option) = arg
def addPrefixed(prefix: String, arg: String): Unit =
prefixes.getOrElseUpdate(prefix, new mutable.HashSet) += arg
def addBinding(tag: String, key: String, value: String): Unit =
if (key.length > 0)
bindings.getOrElseUpdate(tag, new mutable.HashMap)(key) = value
def addBinding(tag: String, binding: Pair[String, String]): Unit =
addBinding(tag, binding._1, binding._2)
def addOther(arg: String): Unit = others += arg
def contains(option: String): Boolean = options(option)
def getArgument(option: String): Option[String] = arguments get option
def getSuffixes(prefix: String): mutable.Set[String] =
prefixes.getOrElse(prefix, new mutable.HashSet)
def containsSuffix(prefix: String, suffix: String): Boolean =
prefixes get prefix exists (set => set(suffix))
def getBindings(tag: String): mutable.Map[String, String] =
bindings.getOrElse(tag, new mutable.HashMap)
def getBinding(option: String, key: String): Option[String] =
bindings get option flatMap (_ get key)
def getOthers: List[String] = others.toList
}
|
