xerial.core.util.CommandLineTokenizer.scala Maven / Gradle / Ivy
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/*
* Copyright 2012 Taro L. Saito
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package xerial.core.util
import scala.util.parsing.combinator.RegexParsers
import xerial.core.log.Logger
//--------------------------------------
//
// CommandLineTokenizer.scala
// Since: 2012/07/17 18:38
//
//--------------------------------------
/**
* Tokenize single string representations of command line arguments into Array[String]
*
* @author Taro L. Saito
*/
object CommandLineTokenizer extends RegexParsers with Logger {
private def unquote(s: String): String = s.substring(1, s.length() - 1)
def stringLiteral: Parser[String] =
("\"" + """([^"\p{Cntrl}\\]|\\[\\/\\"bfnrt]|\\u[a-fA-F0-9]{4})*""" + "\"").r ^^
{ unquote(_) }
def quotation: Parser[String] =
("'" + """([^'\p{Cntrl}\\]|\\[\\/\\"bfnrt]|\\u[a-fA-F0-9]{4})*""" + "'").r ^^
{ unquote(_) }
def other: Parser[String] = """([^\"'\s]+)""".r
def token: Parser[String] = stringLiteral | quotation | other
def tokens: Parser[List[String]] = rep(token)
def tokenize(line: String): Array[String] = {
val p = parseAll(tokens, line)
val r = p match {
case Success(result, next) => result
case Error(msg, next) => {
warn {
msg
}
List.empty
}
case Failure(msg, next) => {
warn {
msg
}
List.empty
}
}
r.toArray
}
}