dotty.tools.dotc.quoted.TastyString.scala Maven / Gradle / Ivy

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package dotty.tools.dotc.quoted

import scala.language.unsafeNulls

import java.util.Base64
import java.nio.charset.StandardCharsets.UTF_8

/** Utils for String representation of TASTY */
object TastyString {

  // Max size of a string literal in the bytecode
  private inline val maxStringSize = 65535

  /** Encode TASTY bytes into a List of String */
  def pickle(bytes: Array[Byte]): List[String] = {
    val str = new String(Base64.getEncoder().encode(bytes), UTF_8)
    str.toSeq.sliding(maxStringSize, maxStringSize).map(_.unwrap).toList
  }

  /** Decode the List of Strings into TASTY bytes */
  def unpickle(strings: List[String]): Array[Byte] = {
    val string = new StringBuilder
    strings.foreach(string.append)
    Base64.getDecoder().decode(string.result().getBytes(UTF_8))
  }

  /** Decode the Strings into TASTY bytes */
  def unpickle(string: String): Array[Byte] =
    Base64.getDecoder().decode(string.getBytes(UTF_8))

}