lzma_lzma1_decoder Struct Reference

Public Types
enum	{   SEQ_NORMALIZE , SEQ_IS_MATCH , seq_8 =(SEQ_LITERAL) , seq_8 =(SEQ_LITERAL) ,   SEQ_LITERAL_WRITE , SEQ_IS_REP , seq_len =(SEQ_MATCH_LEN) , seq_6 =(SEQ_DIST_SLOT) ,   SEQ_DIST_MODEL , SEQ_DIRECT , seq_4 =(SEQ_ALIGN) , SEQ_EOPM ,   SEQ_IS_REP0 , SEQ_SHORTREP , SEQ_IS_REP0_LONG , SEQ_IS_REP1 ,   SEQ_IS_REP2 , seq_len =(SEQ_MATCH_LEN) , SEQ_COPY }
	Position where to continue the decoder loop. More...

Data Fields
probability	literal [LITERAL_CODERS_MAX][LITERAL_CODER_SIZE]
	Literals; see comments in lzma_common.h. More...
probability	is_match [STATES][POS_STATES_MAX]
	If 1, it's a match. Otherwise it's a single 8-bit literal. More...
probability	is_rep [STATES]
	If 1, it's a repeated match. The distance is one of rep0 .. rep3. More...
probability	is_rep0 [STATES]
probability	is_rep1 [STATES]
probability	is_rep2 [STATES]
	If 0, distance of a repeated match is rep2. Otherwise it is rep3. More...
probability	is_rep0_long [STATES][POS_STATES_MAX]
probability	dist_slot [DIST_STATES][DIST_SLOTS]
probability	pos_special [FULL_DISTANCES - DIST_MODEL_END]
probability	pos_align [ALIGN_SIZE]
lzma_length_decoder	match_len_decoder
	Length of a normal match. More...
lzma_length_decoder	rep_len_decoder
	Length of a repeated match. More...
lzma_range_decoder	rc
lzma_lzma_state	state
uint32_t	rep0
	Distance of the latest match. More...
uint32_t	rep1
	Distance of second latest match. More...
uint32_t	rep2
	Distance of third latest match. More...
uint32_t	rep3
	Distance of fourth latest match. More...
uint32_t	pos_mask
uint32_t	literal_context_bits
uint32_t	literal_pos_mask
lzma_vli	uncompressed_size
bool	allow_eopm
enum lzma_lzma1_decoder:: { ... }	sequence
	Position where to continue the decoder loop. More...
probability *	probs
	Base of the current probability tree. More...
uint32_t	symbol
uint32_t	limit
uint32_t	offset
uint32_t	len

Member Enumeration Documentation

anonymous enum

anonymous enum

Position where to continue the decoder loop.

Field Documentation

literal

probability lzma_lzma1_decoder::literal[LITERAL_CODERS_MAX][LITERAL_CODER_SIZE]

Literals; see comments in lzma_common.h.

is_match

probability lzma_lzma1_decoder::is_match[STATES][POS_STATES_MAX]

If 1, it's a match. Otherwise it's a single 8-bit literal.

is_rep

probability lzma_lzma1_decoder::is_rep[STATES]

If 1, it's a repeated match. The distance is one of rep0 .. rep3.

is_rep0

probability lzma_lzma1_decoder::is_rep0[STATES]

If 0, distance of a repeated match is rep0. Otherwise check is_rep1.

is_rep1

probability lzma_lzma1_decoder::is_rep1[STATES]

If 0, distance of a repeated match is rep1. Otherwise check is_rep2.

is_rep2

probability lzma_lzma1_decoder::is_rep2[STATES]

If 0, distance of a repeated match is rep2. Otherwise it is rep3.

is_rep0_long

probability lzma_lzma1_decoder::is_rep0_long[STATES][POS_STATES_MAX]

If 1, the repeated match has length of one byte. Otherwise the length is decoded from rep_len_decoder.

dist_slot

probability lzma_lzma1_decoder::dist_slot[DIST_STATES][DIST_SLOTS]

Probability tree for the highest two bits of the match distance. There is a separate probability tree for match lengths of 2 (i.e. MATCH_LEN_MIN), 3, 4, and [5, 273].

pos_special

probability lzma_lzma1_decoder::pos_special[FULL_DISTANCES - DIST_MODEL_END]

Probability trees for additional bits for match distance when the distance is in the range [4, 127].

pos_align

probability lzma_lzma1_decoder::pos_align[ALIGN_SIZE]

Probability tree for the lowest four bits of a match distance that is equal to or greater than 128.

match_len_decoder

lzma_length_decoder lzma_lzma1_decoder::match_len_decoder

Length of a normal match.

rep_len_decoder

lzma_length_decoder lzma_lzma1_decoder::rep_len_decoder

Length of a repeated match.

rep0

uint32_t lzma_lzma1_decoder::rep0

Distance of the latest match.

rep1

uint32_t lzma_lzma1_decoder::rep1

Distance of second latest match.

rep2

uint32_t lzma_lzma1_decoder::rep2

Distance of third latest match.

rep3

uint32_t lzma_lzma1_decoder::rep3

Distance of fourth latest match.

uncompressed_size

lzma_vli lzma_lzma1_decoder::uncompressed_size

Uncompressed size as bytes, or LZMA_VLI_UNKNOWN if end of payload marker is expected.

allow_eopm

bool lzma_lzma1_decoder::allow_eopm

True if end of payload marker (EOPM) is allowed even when uncompressed_size is known; false if EOPM must not be present. This is ignored if uncompressed_size == LZMA_VLI_UNKNOWN.

enum { ... } lzma_lzma1_decoder::sequence

Position where to continue the decoder loop.

probs

probability* lzma_lzma1_decoder::probs

Base of the current probability tree.

symbol

uint32_t lzma_lzma1_decoder::symbol

Symbol being decoded. This is also used as an index variable in bittree decoders: probs[symbol]

limit

uint32_t lzma_lzma1_decoder::limit

Used as a loop termination condition on bittree decoders and direct bits decoder.

offset

uint32_t lzma_lzma1_decoder::offset

Matched literal decoder: 0x100 or 0 to help avoiding branches. Bittree reverse decoders: Offset of the next bit: 1 << offset

len

uint32_t lzma_lzma1_decoder::len

If decoding a literal: match byte. If decoding a match: length of the match.

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The documentation for this struct was generated from the following file:

• liblzma/lzma/lzma_decoder.c