Constants for pre-trained dictionary support. More...

Macros
#define	ZXC_DICT_SIZE_MAX ((1U << 16) - 1U)
	Maximum dictionary content size in bytes (64 KB - 1).

#define	ZXC_DICT_MAGIC 0x9CB0D1C7U
	Magic word opening a .zxd dictionary file, stored little-endian (C7 D1 B0 9C).

#define	ZXC_DICT_HEADER_SIZE 16
	Size of the .zxd dictionary file header in bytes.

#define	ZXC_HUF_TABLE_SIZE 128
	Size of a packed literal Huffman code-lengths table (256 symbols, 4 bits each): the shared table in a .zxd file, and internally the per-block lengths header.

Detailed Description

Constants for pre-trained dictionary support.

Macro Definition Documentation

◆ ZXC_DICT_HEADER_SIZE

#define ZXC_DICT_HEADER_SIZE 16

Size of the .zxd dictionary file header in bytes.

Definition at line 81 of file zxc_constants.h.

◆ ZXC_DICT_MAGIC

#define ZXC_DICT_MAGIC 0x9CB0D1C7U

Magic word opening a .zxd dictionary file, stored little-endian (C7 D1 B0 9C).

Definition at line 79 of file zxc_constants.h.

◆ ZXC_DICT_SIZE_MAX

#define ZXC_DICT_SIZE_MAX ((1U << 16) - 1U)

Maximum dictionary content size in bytes (64 KB - 1).

16-bit for two reasons that happen to cap at the same 65535: the .zxd header stores the content size in a 16-bit field, and LZ77 match offsets are 16-bit (max distance 65535).

Definition at line 77 of file zxc_constants.h.

◆ ZXC_HUF_TABLE_SIZE

#define ZXC_HUF_TABLE_SIZE 128

Size of a packed literal Huffman code-lengths table (256 symbols, 4 bits each): the shared table in a .zxd file, and internally the per-block lengths header.

See zxc_train_dict_huf() / zxc_dict_huf().