Package org.apache.commons.compress.compressors.zstandard

Class ZstdConstants

java.lang.Object

org.apache.commons.compress.compressors.zstandard.ZstdConstants

public class ZstdConstants
extends Object

Zstd constants.

Since:

1.28.0

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ZSTD_CHAINLOG_MAX	Maximum chain log value.
static final int	ZSTD_CHAINLOG_MIN	Minimum chain log value.
static final int	ZSTD_CLEVEL_DEFAULT	Default compression level.
static final int	ZSTD_CLEVEL_MAX	Maximum compression level.
static final int	ZSTD_CLEVEL_MIN	Minimum compression level.
static final int	ZSTD_HASHLOG_MAX	Maximum hash log value.
static final int	ZSTD_HASHLOG_MIN	Minimum hash log value.
static final int	ZSTD_MINMATCH_MAX	ZSTD_MINMATCH_MAX = 7.
static final int	ZSTD_MINMATCH_MIN	ZSTD_MINMATCH_MAX = 3.
static final int	ZSTD_SEARCHLOG_MAX	Maximum search log value.
static final int	ZSTD_SEARCHLOG_MIN	Minimum search log value.
static final int	ZSTD_WINDOWLOG_LIMIT_DEFAULT	ZSTD_WINDOWLOG_LIMIT_DEFAULT = 27.
static final int	ZSTD_WINDOWLOG_MAX	Maximum window log value.
static final int	ZSTD_WINDOWLOG_MIN	Minimum window log value.

Constructor Summary

Constructors

Constructor	Description
ZstdConstants()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

ZSTD_CHAINLOG_MAX

public static final int ZSTD_CHAINLOG_MAX

Maximum chain log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setLevel(int)
• zstd.h

ZSTD_CHAINLOG_MIN

public static final int ZSTD_CHAINLOG_MIN

Minimum chain log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setLevel(int)
• zstd.h

ZSTD_CLEVEL_DEFAULT

public static final int ZSTD_CLEVEL_DEFAULT

Default compression level.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setLevel(int)
• zstd.h

ZSTD_CLEVEL_MAX

public static final int ZSTD_CLEVEL_MAX

Maximum compression level.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setLevel(int)
• zstd.h

ZSTD_CLEVEL_MIN

public static final int ZSTD_CLEVEL_MIN

Minimum compression level.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setLevel(int)
• zstd.h

ZSTD_HASHLOG_MAX

public static final int ZSTD_HASHLOG_MAX

Maximum hash log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setHashLog(int)
• zstd.h

ZSTD_HASHLOG_MIN

public static final int ZSTD_HASHLOG_MIN

Minimum hash log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setHashLog(int)
• zstd.h

ZSTD_MINMATCH_MAX

public static final int ZSTD_MINMATCH_MAX

ZSTD_MINMATCH_MAX = 7. Only for ZSTD_fast, other strategies are limited to 6.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setMinMatch(int)
• zstd.h
• Constant Field Values

ZSTD_MINMATCH_MIN

public static final int ZSTD_MINMATCH_MIN

ZSTD_MINMATCH_MAX = 3. Only for ZSTD_btopt+, faster strategies are limited to 4.

See Also:

• Constant Field Values

ZSTD_SEARCHLOG_MAX

public static final int ZSTD_SEARCHLOG_MAX

Maximum search log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setSearchLog(int)
• zstd.h

ZSTD_SEARCHLOG_MIN

public static final int ZSTD_SEARCHLOG_MIN

Minimum search log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setSearchLog(int)
• zstd.h

ZSTD_WINDOWLOG_LIMIT_DEFAULT

public static final int ZSTD_WINDOWLOG_LIMIT_DEFAULT

ZSTD_WINDOWLOG_LIMIT_DEFAULT = 27.

By default, the streaming decoder will refuse any frame requiring larger than (in C) (1 << ZSTD_WINDOWLOG_LIMIT_DEFAULT) window size, to preserve host's memory from unreasonable requirements.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setMinMatch(int)
• zstd.h
• Constant Field Values

ZSTD_WINDOWLOG_MAX

public static final int ZSTD_WINDOWLOG_MAX

Maximum window log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setWindowLog(int)
• zstd.h

ZSTD_WINDOWLOG_MIN

public static final int ZSTD_WINDOWLOG_MIN

Minimum window log value.

This constant name matches the name in the C header file.

See Also:

• ZstdCompressorOutputStream.Builder.setWindowLog(int)
• zstd.h

Constructor Details

ZstdConstants

public ZstdConstants()