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use bytebuffer array

This commit is contained in:
Greg Wilkins 2014-06-02 13:03:48 +02:00
parent 48f1668b28
commit c607bb6efc
1 changed files with 19 additions and 11 deletions
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28
jetty-hpack/src/main/java/org/eclipse/jetty/hpack/Huffman.java
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@ -294,6 +294,7 @@ public class Huffman
static final char[] rowsym;
static final byte[] rowbits;
// Build the Huffman lookup tree
static
{
int r=0;
@ -342,19 +343,21 @@ public class Huffman
}
static public String decode(ByteBuffer buf) throws IOException
static public String decode(ByteBuffer buffer) throws IOException
{
// TODO offer a version that does a direct lookup of compressed strings to known values
StringBuilder out = new StringBuilder(buf.remaining()*2);
StringBuilder out = new StringBuilder(buffer.remaining()*2);
int node = 0;
int current = 0;
int bits = 0;
// TODO use buf array
while (buf.hasRemaining())
byte[] array = buffer.array();
int start=buffer.arrayOffset()+buffer.position();
int end=start+buffer.remaining();
buffer.position(buffer.limit());
for (int i=start; i<end; i++)
{
int b = buf.get() & 0xFF;
int b = array[i]&0xFF;
current = (current << 8) | b;
bits += 8;
while (bits >= 8)
@ -395,11 +398,14 @@ public class Huffman
}
static public void encode(ByteBuffer buf,String s) throws IOException
static public void encode(ByteBuffer buffer,String s) throws IOException
{
long current = 0;
int n = 0;
byte[] array = buffer.array();
int p=buffer.arrayOffset()+buffer.position();
int len = s.length();
for (int i=0;i<len;i++)
{
@ -416,7 +422,7 @@ public class Huffman
while (n >= 8)
{
n -= 8;
buf.put((byte)(current >> n));
array[p++]=(byte)(current >> n);
}
}
@ -424,7 +430,9 @@ public class Huffman
{
current <<= (8 - n);
current |= (0xFF >>> n);
buf.put((byte)current);
array[p++]=(byte)current;
}
buffer.position(p-buffer.arrayOffset());
}
}