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Fixes issue 22

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Thanks for the report.
getUncompressedLength() was an experimental method, that tries to migrate C++ code of the Snappy into Java. I removed this method.
This commit is contained in:
Taro L. Saito 2011-07-02 14:01:49 +09:00
parent c6e2aebe11
commit 36f0208eb1
1 changed files with 0 additions and 57 deletions
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57
src/main/java/org/xerial/snappy/Snappy.java
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@ -419,63 +419,6 @@ public class Snappy
return impl.uncompressedLength(input, offset, length); return impl.uncompressedLength(input, offset, length);
} }
public static class CompressedDataLength
{
public final int cursor;
public final int uncompressedLength;
public CompressedDataLength(int cursor, int uncompressedLength) {
this.cursor = cursor;
this.uncompressedLength = uncompressedLength;
}
}
public static CompressedDataLength getUncompressedLength(byte[] input, int offset, int limit) throws IOException {
if (input == null)
throw new NullPointerException("input is null");
long b = 0;
long result = 0;
int cursor = offset;
if (cursor >= limit)
return null;
for (;;) {
b = input[cursor++];
result = b & 127;
if (b < 128)
break;
if (cursor >= limit)
return null;
b = input[cursor++];
result |= (b & 127) << 7;
if (b < 128)
break;
if (cursor >= limit)
return null;
b = input[cursor++];
result |= (b & 127) << 14;
if (b < 128)
break;
if (cursor >= limit)
return null;
b = input[cursor++];
result |= (b & 127) << 21;
if (b < 128)
break;
if (cursor >= limit)
return null;
b = input[cursor++];
result |= (b & 127) << 28;
if (b < 16)
break;
return null; // Value is too long to be a varint32
}
if (result > Integer.MAX_VALUE)
throw new IllegalStateException("cannot uncompress byte array longer than 2^31-1: " + result);
return new CompressedDataLength(cursor, (int) result);
}
/** /**
* Get the uncompressed byte size of the given compressed input. This * Get the uncompressed byte size of the given compressed input. This
* operation taks O(1) time. * operation taks O(1) time.