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Diffstat (limited to 'src/compiler/scala/reflect/internal/ByteCodecs.scala')
| -rw-r--r-- | src/compiler/scala/reflect/internal/ByteCodecs.scala | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/src/compiler/scala/reflect/internal/ByteCodecs.scala b/src/compiler/scala/reflect/internal/ByteCodecs.scala deleted file mode 100644 index 8b0fc9300a..0000000000 --- a/src/compiler/scala/reflect/internal/ByteCodecs.scala +++ /dev/null @@ -1,216 +0,0 @@ -/* __ *\ -** ________ ___ / / ___ Scala API ** -** / __/ __// _ | / / / _ | (c) 2007-2011, LAMP/EPFL ** -** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** -** /____/\___/_/ |_/____/_/ | | ** -** |/ ** -\* */ -package scala.reflect.internal - -object ByteCodecs { - - def avoidZero(src: Array[Byte]): Array[Byte] = { - var i = 0 - val srclen = src.length - var count = 0 - while (i < srclen) { - if (src(i) == 0x7f) count += 1 - i += 1 - } - val dst = new Array[Byte](srclen + count) - i = 0 - var j = 0 - while (i < srclen) { - val in = src(i) - if (in == 0x7f) { - dst(j) = (0xc0).toByte - dst(j + 1) = (0x80).toByte - j += 2 - } else { - dst(j) = (in + 1).toByte - j += 1 - } - i += 1 - } - dst - } - - def regenerateZero(src: Array[Byte]): Int = { - var i = 0 - val srclen = src.length - var j = 0 - while (i < srclen) { - val in: Int = src(i) & 0xff - if (in == 0xc0 && (src(i + 1) & 0xff) == 0x80) { - src(j) = 0x7f - i += 2 - } else { - src(j) = (in - 1).toByte - i += 1 - } - j += 1 - } - j - } - - def encode8to7(src: Array[Byte]): Array[Byte] = { - val srclen = src.length - val dstlen = (srclen * 8 + 6) / 7 - val dst = new Array[Byte](dstlen) - var i = 0 - var j = 0 - while (i + 6 < srclen) { - var in: Int = src(i) & 0xff - dst(j) = (in & 0x7f).toByte - var out: Int = in >>> 7 - in = src(i + 1) & 0xff - dst(j + 1) = (out | (in << 1) & 0x7f).toByte - out = in >>> 6 - in = src(i + 2) & 0xff - dst(j + 2) = (out | (in << 2) & 0x7f).toByte - out = in >>> 5 - in = src(i + 3) & 0xff - dst(j + 3) = (out | (in << 3) & 0x7f).toByte - out = in >>> 4 - in = src(i + 4) & 0xff - dst(j + 4) = (out | (in << 4) & 0x7f).toByte - out = in >>> 3 - in = src(i + 5) & 0xff - dst(j + 5) = (out | (in << 5) & 0x7f).toByte - out = in >>> 2 - in = src(i + 6) & 0xff - dst(j + 6) = (out | (in << 6) & 0x7f).toByte - out = in >>> 1 - dst(j + 7) = out.toByte - i += 7 - j += 8 - } - if (i < srclen) { - var in: Int = src(i) & 0xff - dst(j) = (in & 0x7f).toByte; j += 1 - var out: Int = in >>> 7 - if (i + 1 < srclen) { - in = src(i + 1) & 0xff - dst(j) = (out | (in << 1) & 0x7f).toByte; j += 1 - out = in >>> 6 - if (i + 2 < srclen) { - in = src(i + 2) & 0xff - dst(j) = (out | (in << 2) & 0x7f).toByte; j += 1 - out = in >>> 5 - if (i + 3 < srclen) { - in = src(i + 3) & 0xff - dst(j) = (out | (in << 3) & 0x7f).toByte; j += 1 - out = in >>> 4 - if (i + 4 < srclen) { - in = src(i + 4) & 0xff - dst(j) = (out | (in << 4) & 0x7f).toByte; j += 1 - out = in >>> 3 - if (i + 5 < srclen) { - in = src(i + 5) & 0xff - dst(j) = (out | (in << 5) & 0x7f).toByte; j += 1 - out = in >>> 2 - } - } - } - } - } - if (j < dstlen) dst(j) = out.toByte - } - dst - } - - @deprecated("use 2-argument version instead", "2.8.0") - def decode7to8(src: Array[Byte], srclen: Int, dstlen: Int) { decode7to8(src, srclen) } - - def decode7to8(src: Array[Byte], srclen: Int): Int = { - var i = 0 - var j = 0 - val dstlen = (srclen * 7 + 7) / 8 - while (i + 7 < srclen) { - var out: Int = src(i) - var in: Byte = src(i + 1) - src(j) = (out | (in & 0x01) << 7).toByte - out = in >>> 1 - in = src(i + 2) - src(j + 1) = (out | (in & 0x03) << 6).toByte - out = in >>> 2 - in = src(i + 3) - src(j + 2) = (out | (in & 0x07) << 5).toByte - out = in >>> 3 - in = src(i + 4) - src(j + 3) = (out | (in & 0x0f) << 4).toByte - out = in >>> 4 - in = src(i + 5) - src(j + 4) = (out | (in & 0x1f) << 3).toByte - out = in >>> 5 - in = src(i + 6) - src(j + 5) = (out | (in & 0x3f) << 2).toByte - out = in >>> 6 - in = src(i + 7) - src(j + 6) = (out | in << 1).toByte - i += 8 - j += 7 - } - if (i < srclen) { - var out: Int = src(i) - if (i + 1 < srclen) { - var in: Byte = src(i + 1) - src(j) = (out | (in & 0x01) << 7).toByte; j += 1 - out = in >>> 1 - if (i + 2 < srclen) { - in = src(i + 2) - src(j) = (out | (in & 0x03) << 6).toByte; j += 1 - out = in >>> 2 - if (i + 3 < srclen) { - in = src(i + 3) - src(j) = (out | (in & 0x07) << 5).toByte; j += 1 - out = in >>> 3 - if (i + 4 < srclen) { - in = src(i + 4) - src(j) = (out | (in & 0x0f) << 4).toByte; j += 1 - out = in >>> 4 - if (i + 5 < srclen) { - in = src(i + 5) - src(j) = (out | (in & 0x1f) << 3).toByte; j += 1 - out = in >>> 5 - if (i + 6 < srclen) { - in = src(i + 6) - src(j) = (out | (in & 0x3f) << 2).toByte; j += 1 - out = in >>> 6 - } - } - } - } - } - } - if (j < dstlen) src(j) = out.toByte - } - dstlen - } - - def encode(xs: Array[Byte]): Array[Byte] = avoidZero(encode8to7(xs)) - - @deprecated("use 1-argument version instead", "2.8.0") - def decode(xs: Array[Byte], dstlen: Int) { decode(xs) } - - /** - * Destructively decodes array xs and returns the length of the decoded array. - * - * Sometimes returns (length+1) of the decoded array. Example: - * - * scala> val enc = reflect.generic.ByteCodecs.encode(Array(1,2,3)) - * enc: Array[Byte] = Array(2, 5, 13, 1) - * - * scala> reflect.generic.ByteCodecs.decode(enc) - * res43: Int = 4 - * - * scala> enc - * res44: Array[Byte] = Array(1, 2, 3, 0) - * - * However, this does not always happen. - */ - def decode(xs: Array[Byte]): Int = { - val len = regenerateZero(xs) - decode7to8(xs, len) - } -} |