Copied old implementation of Console to the jvm...

Copied old implementation of Console to the jvm-1.4 library.

1 files changed, 345 insertions, 0 deletions

diff --git a/src/jvm14-library/scala/Console.scala b/src/jvm14-library/scala/Console.scala
new file mode 100644
index 0000000000..fe29150caa
--- /dev/null
+++ b/src/jvm14-library/scala/Console.scala
@@ -0,0 +1,345 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2007, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id$
+
+
+package scala
+
+import java.io.{BufferedReader, InputStream, InputStreamReader,
+                OutputStream, PrintStream, Reader}
+import java.text.MessageFormat
+
+import scala.util.DynamicVariable
+import Predef._
+
+
+/** The <code>Console</code> object implements functionality for
+ *  printing Scala values on the terminal. There are also functions
+ *  for reading specific values. <code>Console</code> also defines
+ *  constants for marking up text on ANSI terminals.
+ *
+ *  @author  Matthias Zenger
+ *  @version 1.0, 03/09/2003
+ */
+object Console {
+
+  // ANSI colors foreground
+  final val BLACK      = "\033[30m"
+  final val RED        = "\033[31m"
+  final val GREEN      = "\033[32m"
+  final val YELLOW     = "\033[33m"
+  final val BLUE       = "\033[34m"
+  final val MAGENTA    = "\033[35m"
+  final val CYAN       = "\033[36m"
+  final val WHITE      = "\033[37m"
+
+  // ANSI colors background
+  final val BLACK_B    = "\033[40m"
+  final val RED_B      = "\033[41m"
+  final val GREEN_B    = "\033[42m"
+  final val YELLOW_B   = "\033[43m"
+  final val BLUE_B     = "\033[44m"
+  final val MAGENTA_B  = "\033[45m"
+  final val CYAN_B     = "\033[46m"
+  final val WHITE_B    = "\033[47m"
+
+  // ANSI styles
+  final val RESET      = "\033[0m"
+  final val BOLD       = "\033[1m"
+  final val UNDERLINED = "\033[4m"
+  final val BLINK      = "\033[5m"
+  final val REVERSED   = "\033[7m"
+  final val INVISIBLE  = "\033[8m"
+
+  private val outVar = new DynamicVariable[PrintStream](java.lang.System.out)
+  private val inVar = new DynamicVariable[BufferedReader](
+    new BufferedReader(new InputStreamReader(java.lang.System.in)))
+
+  def out = outVar.value
+  def in = inVar.value
+
+  val err = java.lang.System.err
+
+  /** Set the default output stream.
+   *
+   *  @param out the new output stream.
+   */
+  def setOut(out: PrintStream) { outVar.value = out }
+
+  /** Set the default output stream for the duration
+   *  of execution of one thunk.
+   *
+   *  @param out the new output stream.
+   *  @param thunk the code to execute with
+   *               the new output stream active
+   *  @return ...
+   */
+  def withOut[T](out: PrintStream)(thunk: =>T): T =
+    outVar.withValue(out)(thunk)
+
+  /** Set the default output stream.
+   *
+   *  @param@ out the new output stream.
+   */
+  def setOut(out: OutputStream): Unit =
+    setOut(new PrintStream(out))
+
+  /** Set the default output stream for the duration
+   *  of execution of one thunk.
+   *
+   *  @param out the new output stream.
+   *  @param thunk the code to execute with
+   *               the new output stream active
+   *  @return ...
+   */
+  def withOut[T](out: OutputStream)(thunk: =>T): T =
+    withOut(new PrintStream(out))(thunk)
+
+
+  /** Set the default input stream.
+   *
+   *  @param reader specifies the new input stream.
+   */
+  def setIn(reader: Reader): Unit = {
+    inVar.value = new BufferedReader(reader)
+  }
+
+  /** Set the default input stream for the duration
+   *  of execution of one thunk.
+   *
+   *  @param in the new input stream.
+   *  @param thunk the code to execute with
+   *               the new input stream active
+   */
+    def withIn[T](reader: Reader)(thunk: =>T): T =
+      inVar.withValue(new BufferedReader(reader))(thunk)
+
+
+  /** Set the default input stream.
+   *
+   *  @param in the new input stream.
+   */
+  def setIn(in: InputStream): Unit =
+    setIn(new InputStreamReader(in))
+
+  /** Set the default input stream for the duration
+   *  of execution of one thunk.
+   *
+   *  @param in the new input stream.
+   *  @param thunk the code to execute with
+   *               the new input stream active
+   */
+  def withIn[T](in: InputStream)(thunk: =>T): T =
+    withIn(new InputStreamReader(in))(thunk)
+
+  /** Print an object on the terminal.
+   *
+   *  @param obj the object to print.
+   */
+  def print(obj: Any): Unit =
+    out.print(if (null == obj) "null" else obj.toString())
+
+  /** Flush the output stream. This function is required when partial
+   *  output (i.e. output not terminated by a new line character) has
+   *  to be made visible on the terminal.
+   */
+  def flush() { out.flush() }
+
+  /** Print a new line character on the terminal.
+   */
+  def println(): Unit = out.println()
+
+  /** Print out an object followed by a new line character.
+   *
+   *  @param x the object to print.
+   */
+  def println(x: Any): Unit = out.println(x)
+
+  /** <p>
+   *    Prints its arguments as a formatted string, based on a string
+   *    pattern (in a fashion similar to printf in C).
+   *  </p>
+   *  <p>
+   *    The interpretation of the formatting patterns is described in
+   *    <a href="" target="contentFrame" class="java/text/MessageFormat">
+   *    <code>java.text.MessageFormat</code></a>.
+   *  </p>
+   *
+   *  @param text the pattern for formatting the arguments.
+   *  @param args the arguments used to instantiating the pattern.
+   *  @throws java.lang.IllegalArgumentException
+   */
+  def printf(text: String, args: Any*) { format(text, args: _*) }
+
+  /**
+   *  @see <a href="#printf(java.lang.String,scala.Any*)"
+   *       target="contentFrame">Console.printf</a>.
+   */
+  def format(text: String, args: Any*): Unit =
+    out.print(
+      if (text eq null) "null"
+      else MessageFormat.format(text, textParams(args))
+    )
+
+  /** Read a full line from the terminal.
+   *
+   *  @return the string read from the terminal.
+   */
+  def readLine(): String = in.readLine()
+
+  /** Print a formatted text and read a full line from the terminal
+   *
+   *  @param text the format of the text to print out.
+   *  @param args the parameters used to instantiate the format.
+   *  @return the string read from the terminal.
+   */
+  def readLine(text: String, args: Any*): String = {
+    format(text, args: _*)
+    readLine()
+  }
+
+
+  /** Read a boolean value from the terminal.
+   *
+   *  @return the boolean value read from the terminal.
+   */
+  def readBoolean(): Boolean = readLine().toLowerCase() match {
+    case "true" => true
+    case "t" => true
+    case "yes" => true
+    case "y" => true
+    case _ => false
+  }
+
+  /** Read a byte value from the terminal.
+   */
+  def readByte(): Byte = readLine().toByte
+
+  /** Read a short value from the terminal.
+   */
+  def readShort(): Short = readLine().toShort
+
+  /** Read a char value from the terminal.
+   */
+  def readChar(): Char = readLine() charAt 0
+
+  /** Read an int value from the terminal.
+   */
+  def readInt(): Int = readLine().toInt
+
+  /** Read an int value from the terminal.
+   */
+  def readLong(): Long = readLine().toLong
+
+  /** Read a float value from the terminal.
+   */
+  def readFloat(): Float = readLine().toFloat
+
+  /** Read a double value from the terminal.
+   */
+  def readDouble(): Double = readLine().toDouble
+
+  /** Read in some structured input, specified by a format specifier.
+   *  See class <code>java.text.MessageFormat</code> for details of
+   *  the format specification.
+   *
+   *  @param format the format of the input.
+   *  @return a list of all extracted values.
+   */
+  def readf(format: String): List[Any] =
+    textComponents(new MessageFormat(format).parse(readLine()))
+
+  /** Read in some structured input, specified by a format specifier.
+   *  Opposed to <code>readf</code>, this function only returns the
+   *  first value extracted from the input according to the format
+   *  specification.
+   *
+   *  @param format ...
+   *  @return ...
+   */
+  def readf1(format: String): Any = readf(format).head
+
+  /** Read in some structured input, specified by a format specifier.
+   *  Opposed to <code>readf</code>, this function only returns the
+   *  first two values extracted from the input according to the format
+   *  specification.
+   *
+   *  @param format ...
+   *  @return ...
+   */
+  def readf2(format: String): (Any, Any) = {
+    val res = readf(format)
+    (res.head, res.tail.head)
+  }
+
+  /** Read in some structured input, specified by a format specifier.
+   *  Opposed to <code>readf</code>, this function only returns the
+   *  first three values extracted from the input according to the format
+   *  specification.
+   *
+   *  @param format ...
+   *  @return ...
+   */
+  def readf3(format: String): (Any, Any, Any) = {
+    val res = readf(format)
+    (res.head, res.tail.head, res.tail.tail.head)
+  }
+
+  private def textComponents(a: Array[AnyRef]): List[Any] = {
+    var i: Int = a.length - 1
+    var res: List[Any] = Nil
+    while (i >= 0) {
+      res = (a(i) match {
+        case x: java.lang.Boolean   => x.booleanValue()
+        case x: java.lang.Byte      => x.byteValue()
+        case x: java.lang.Short     => x.shortValue()
+        case x: java.lang.Character => x.charValue()
+        case x: java.lang.Integer   => x.intValue()
+        case x: java.lang.Long      => x.longValue()
+        case x: java.lang.Float     => x.floatValue()
+        case x: java.lang.Double    => x.doubleValue()
+        case x => x
+      }) :: res;
+      i -= 1
+    }
+    res
+  }
+
+  private def textParams(s: Seq[Any]): Array[AnyRef] = {
+    val res = new Array[AnyRef](s.length)
+    var i: Int = 0
+    val iter = s.elements
+    while (iter.hasNext) {
+      res(i) = iter.next match {
+        case x: Boolean => java.lang.Boolean.valueOf(x)
+        /** Should use java.lang.Byte.valueOf(Byte), but only available
+         * in Java 1.5 and above. */
+        case x: Byte    => new java.lang.Byte(x)
+        /** Should use java.lang.Short.valueOf(Short), but only available
+         * in Java 1.5 and above. */
+        case x: Short   => new java.lang.Short(x)
+        /** Should use java.lang.Character.valueOf(Char), but only available
+         * in Java 1.5 and above. */
+        case x: Char    => new java.lang.Character(x)
+        /** Should use java.lang.Integer.valueOf(Int), but only available
+         * in Java 1.5 and above. */
+        case x: Int     => new java.lang.Integer(x)
+        /** Should use java.lang.Long.valueOf(Long), but only available
+         * in Java 1.5 and above. */
+        case x: Long    => new java.lang.Long(x)
+        case x: Float   => new java.lang.Float(x)
+        case x: Double  => new java.lang.Double(x)
+        case x: Unit    => "()"
+        case x: AnyRef  => x
+      }
+      i += 1
+    }
+    res
+  }
+}