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@ -7,16 +7,16 @@ import kotlin.math.min |
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public class BitBuf( |
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private val buf: ByteBuf |
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) : AutoCloseable { |
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private var readerIndex: Long = buf.readerIndex().toLong() shl 3 |
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private var readerIndex: Long = buf.readerIndex().toLong() shl LOG_BITS_PER_BYTE |
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private set(value) { |
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field = value |
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buf.readerIndex((readerIndex shr 3).toInt()) |
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buf.readerIndex((readerIndex shr LOG_BITS_PER_BYTE).toInt()) |
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} |
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private var writerIndex: Long = buf.writerIndex().toLong() shl 3 |
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private var writerIndex: Long = buf.writerIndex().toLong() shl LOG_BITS_PER_BYTE |
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private set(value) { |
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field = value |
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buf.writerIndex((writerIndex shr 3).toInt()) |
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buf.writerIndex((writerIndex shr LOG_BITS_PER_BYTE).toInt()) |
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} |
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public fun getBoolean(index: Long): Boolean { |
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@ -28,7 +28,7 @@ public class BitBuf( |
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} |
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public fun getBits(index: Long, len: Int): Int { |
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Preconditions.checkArgument(len in 1..32) |
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Preconditions.checkArgument(len in 1..BITS_PER_INT) |
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if (index < 0 || (index + len) > capacity()) { |
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throw IndexOutOfBoundsException() |
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@ -37,12 +37,12 @@ public class BitBuf( |
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var value = 0 |
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var remaining = len |
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var byteIndex = (index shr 3).toInt() |
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var bitIndex = (index and 7).toInt() |
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var byteIndex = (index shr LOG_BITS_PER_BYTE).toInt() |
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var bitIndex = (index and MASK_BITS_PER_BYTE.toLong()).toInt() |
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while (remaining > 0) { |
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val n = min(8 - bitIndex, remaining) |
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val shift = (8 - (bitIndex + n)) and 7 |
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val n = min(BITS_PER_BYTE - bitIndex, remaining) |
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val shift = (BITS_PER_BYTE - (bitIndex + n)) and MASK_BITS_PER_BYTE |
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val mask = (1 shl n) - 1 |
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val v = buf.getUnsignedByte(byteIndex).toInt() |
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@ -97,19 +97,19 @@ public class BitBuf( |
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} |
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public fun setBits(index: Long, len: Int, value: Int): BitBuf { |
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Preconditions.checkArgument(len in 1..32) |
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Preconditions.checkArgument(len in 1..BITS_PER_INT) |
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if (index < 0 || (index + len) > capacity()) { |
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throw IndexOutOfBoundsException() |
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} |
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var remaining = len |
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var byteIndex = (index shr 3).toInt() |
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var bitIndex = (index and 7).toInt() |
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var byteIndex = (index shr LOG_BITS_PER_BYTE).toInt() |
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var bitIndex = (index and MASK_BITS_PER_BYTE.toLong()).toInt() |
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while (remaining > 0) { |
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val n = min(8 - bitIndex, remaining) |
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val shift = (8 - (bitIndex + n)) and 7 |
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val n = min(BITS_PER_BYTE - bitIndex, remaining) |
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val shift = (BITS_PER_BYTE - (bitIndex + n)) and MASK_BITS_PER_BYTE |
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val mask = (1 shl n) - 1 |
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var v = buf.getUnsignedByte(byteIndex).toInt() |
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@ -171,8 +171,8 @@ public class BitBuf( |
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throw IndexOutOfBoundsException() |
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} |
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val currentByteIndex = writerIndex shr 3 |
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val nextByteIndex = (writerIndex + len + 7) shr 3 |
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val currentByteIndex = writerIndex shr LOG_BITS_PER_BYTE |
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val nextByteIndex = (writerIndex + len + MASK_BITS_PER_BYTE) shr LOG_BITS_PER_BYTE |
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buf.ensureWritable((nextByteIndex - currentByteIndex).toInt()) |
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@ -192,16 +192,16 @@ public class BitBuf( |
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} |
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public fun capacity(): Long { |
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return buf.capacity().toLong() shl 3 |
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return buf.capacity().toLong() shl LOG_BITS_PER_BYTE |
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} |
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public fun capacity(len: Long): BitBuf { |
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buf.capacity((len shr 3).toInt()) |
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buf.capacity((len shr LOG_BITS_PER_BYTE).toInt()) |
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return this |
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} |
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public fun maxCapacity(): Long { |
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return buf.maxCapacity().toLong() shl 3 |
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return buf.maxCapacity().toLong() shl LOG_BITS_PER_BYTE |
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} |
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public fun isReadable(): Boolean { |
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@ -255,11 +255,18 @@ public class BitBuf( |
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} |
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override fun close() { |
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val bits = (((writerIndex + 7) and 7.toLong().inv()) - writerIndex).toInt() |
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val bits = (((writerIndex + MASK_BITS_PER_BYTE) and MASK_BITS_PER_BYTE.toLong().inv()) - writerIndex).toInt() |
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if (bits != 0) { |
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writeZero(bits) |
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} |
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readerIndex = (readerIndex + 7) and 7.toLong().inv() |
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readerIndex = (readerIndex + MASK_BITS_PER_BYTE) and MASK_BITS_PER_BYTE.toLong().inv() |
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} |
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private companion object { |
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private const val LOG_BITS_PER_BYTE = 3 |
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private const val BITS_PER_BYTE = 1 shl LOG_BITS_PER_BYTE |
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private const val MASK_BITS_PER_BYTE = BITS_PER_BYTE - 1 |
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private const val BITS_PER_INT = 32 |
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} |
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} |
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