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Scala example source code file (ByteArrayReader.scala)
The ByteArrayReader.scala Scala example source code/* ___ ____ ___ __ ___ ___ ** / _// __// _ | / / / _ | / _ \ Scala classfile decoder ** __\ \/ /__/ __ |/ /__/ __ |/ ___/ (c) 2003-2013, LAMP/EPFL ** /____/\___/_/ |_/____/_/ |_/_/ http://scala-lang.org/ ** */ package scala package tools.scalap class ByteArrayReader(content: Array[Byte]) { /** the buffer containing the file */ val buf: Array[Byte] = content /** the current input pointer */ var bp: Int = 0 /** return byte at offset 'pos' */ def byteAt(pos: Int): Byte = buf(pos) /** read a byte */ def nextByte: Byte = { bp += 1 buf(bp - 1) } /** read some bytes */ def nextBytes(len: Int): Array[Byte] = { val res = new Array[Byte](len) System.arraycopy(buf, bp, res, 0, len) bp += len res } /** read a character */ def nextChar: Char = { bp += 2 getChar(bp - 2) } /** read an integer */ def nextInt: Int = { bp += 4 getInt(bp - 4) } /** read a long */ def nextLong: Long = { bp += 8 getLong(bp - 8) } /** read a float */ def nextFloat: Float = java.lang.Float.intBitsToFloat(nextInt) /** read a double */ def nextDouble: Double = java.lang.Double.longBitsToDouble(nextLong) /** read an UTF8 encoded string */ def nextUTF8(len: Int): String = { val cs = scala.io.Codec.fromUTF8(buf, bp, len) bp += len new String(cs) } /** extract a character at position bp from buf */ def getChar(bp: Int): Char = (((buf(bp) & 0xff) << 8) + (buf(bp + 1) & 0xff)).asInstanceOf[Char] /** extract an integer at position bp from buf */ def getInt(bp: Int): Int = ((buf(bp ) & 0xff) << 24) + ((buf(bp + 1) & 0xff) << 16) + ((buf(bp + 2) & 0xff) << 8) + (buf(bp + 3) & 0xff) /** extract a long integer at position bp from buf */ def getLong(bp: Int): Long = (getInt(bp).toLong << 32) + (getInt(bp + 4).toLong & 0xffffffffL) /** extract a float at position bp from buf */ def getFloat(bp: Int): Float = java.lang.Float.intBitsToFloat(getInt(bp)) /** extract a double at position bp from buf */ def getDouble(bp: Int): Double = java.lang.Double.longBitsToDouble(getLong(bp)) /** skip next 'n' bytes */ def skip(n: Int) { bp += n } } Other Scala source code examplesHere is a short list of links related to this Scala ByteArrayReader.scala source code file: |
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