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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ai.vespa.airlift.zstd;
class Constants
{
public static final int SIZE_OF_BYTE = 1;
public static final int SIZE_OF_SHORT = 2;
public static final int SIZE_OF_INT = 4;
public static final int SIZE_OF_LONG = 8;
public static final int MAGIC_NUMBER = 0xFD2FB528;
public static final int MAGIC_SKIPFRAME_MIN = 0x184D2A50;
public static final int MAGIC_SKIPFRAME_MAX = 0x184D2A5F;
public static final int MIN_WINDOW_LOG = 10;
public static final int MAX_WINDOW_LOG = 31;
public static final int SIZE_OF_BLOCK_HEADER = 3;
public static final int MIN_SEQUENCES_SIZE = 1;
public static final int MIN_BLOCK_SIZE = 1 // block type tag
+ 1 // min size of raw or rle length header
+ MIN_SEQUENCES_SIZE;
public static final int MAX_BLOCK_SIZE = 128 * 1024;
public static final int REPEATED_OFFSET_COUNT = 3;
// block types
public static final int RAW_BLOCK = 0;
public static final int RLE_BLOCK = 1;
public static final int COMPRESSED_BLOCK = 2;
// sequence encoding types
public static final int SEQUENCE_ENCODING_BASIC = 0;
public static final int SEQUENCE_ENCODING_RLE = 1;
public static final int SEQUENCE_ENCODING_COMPRESSED = 2;
public static final int SEQUENCE_ENCODING_REPEAT = 3;
public static final int MAX_LITERALS_LENGTH_SYMBOL = 35;
public static final int MAX_MATCH_LENGTH_SYMBOL = 52;
public static final int MAX_OFFSET_CODE_SYMBOL = 31;
public static final int DEFAULT_MAX_OFFSET_CODE_SYMBOL = 28;
public static final int LITERAL_LENGTH_TABLE_LOG = 9;
public static final int MATCH_LENGTH_TABLE_LOG = 9;
public static final int OFFSET_TABLE_LOG = 8;
// literal block types
public static final int RAW_LITERALS_BLOCK = 0;
public static final int RLE_LITERALS_BLOCK = 1;
public static final int COMPRESSED_LITERALS_BLOCK = 2;
public static final int TREELESS_LITERALS_BLOCK = 3;
public static final int LONG_NUMBER_OF_SEQUENCES = 0x7F00;
public static final int[] LITERALS_LENGTH_BITS = {0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 2, 2, 3, 3,
4, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16};
public static final int[] MATCH_LENGTH_BITS = {0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 2, 2, 3, 3,
4, 4, 5, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16};
private Constants()
{
}
}
