lzma_decoder.c File Reference

LZMA decoder. More...

#include "lz_decoder.h"
#include "lzma_common.h"
#include "lzma_decoder.h"
#include "range_decoder.h"

Data Structures
struct	lzma_length_decoder
	Length decoder probabilities; see comments in lzma_common.h. More...
struct	lzma_lzma1_decoder

Macros
#define	LZMA_IN_REQUIRED   20
#define	len_decode(target, ld, pos_state, seq)
#define	len_decode_fast(target, ld, pos_state)

Functions
lzma_ret	lzma_lzma_decoder_create (lzma_lz_decoder *lz, const lzma_allocator *allocator, const lzma_options_lzma *options, lzma_lz_options *lz_options)
lzma_ret	lzma_lzma_decoder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters)
	Allocates and initializes LZMA decoder.
bool	lzma_lzma_lclppb_decode (lzma_options_lzma *options, uint8_t byte)
	Decodes the LZMA Properties byte (lc/lp/pb)
uint64_t	lzma_lzma_decoder_memusage_nocheck (const void *options)
uint64_t	lzma_lzma_decoder_memusage (const void *options)
lzma_ret	lzma_lzma_props_decode (void **options, const lzma_allocator *allocator, const uint8_t *props, size_t props_size)

Detailed Description

LZMA decoder.

Macro Definition Documentation

len_decode

#define len_decode	(		target,
			ld,
			pos_state,
			seq )

Value:

do { \
case seq ## _CHOICE: \
    rc_if_0_safe(ld.choice, seq ## _CHOICE) { \
        rc_update_0(ld.choice); \
        probs = ld.low[pos_state];\
        limit = LEN_LOW_SYMBOLS; \
        target = MATCH_LEN_MIN; \
    } else { \
        rc_update_1(ld.choice); \
case seq ## _CHOICE2: \
        rc_if_0_safe(ld.choice2, seq ## _CHOICE2) { \
            rc_update_0(ld.choice2); \
            probs = ld.mid[pos_state]; \
            limit = LEN_MID_SYMBOLS; \
            target = MATCH_LEN_MIN + LEN_LOW_SYMBOLS; \
        } else { \
            rc_update_1(ld.choice2); \
            probs = ld.high; \
            limit = LEN_HIGH_SYMBOLS; \
            target = MATCH_LEN_MIN + LEN_LOW_SYMBOLS \
                    + LEN_MID_SYMBOLS; \
        } \
    } \
    symbol = 1; \
case seq ## _BITTREE: \
    do { \
        rc_bit_safe(probs[symbol], , , seq ## _BITTREE); \
    } while (symbol < limit); \
    target += symbol - limit; \
} while (0)

len_decode_fast

#define len_decode_fast	(		target,
			ld,
			pos_state )

Value:

do { \
    symbol = 1; \
    rc_if_0(ld.choice) { \
        rc_update_0(ld.choice); \
        rc_bittree3(ld.low[pos_state], \
                -LEN_LOW_SYMBOLS + MATCH_LEN_MIN); \
        target = symbol; \
    } else { \
        rc_update_1(ld.choice); \
        rc_if_0(ld.choice2) { \
            rc_update_0(ld.choice2); \
            rc_bittree3(ld.mid[pos_state], -LEN_MID_SYMBOLS \
                    + MATCH_LEN_MIN + LEN_LOW_SYMBOLS); \
            target = symbol; \
        } else { \
            rc_update_1(ld.choice2); \
            rc_bittree8(ld.high, -LEN_HIGH_SYMBOLS \
                    + MATCH_LEN_MIN \
                    + LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS); \
            target = symbol; \
        } \
    } \
} while (0)

LZMA_IN_REQUIRED

#define LZMA_IN_REQUIRED   20

Function Documentation

lzma_lzma_decoder_create()

lzma_ret lzma_lzma_decoder_create ( lzma_lz_decoder * lz, const lzma_allocator * allocator, const lzma_options_lzma * options, lzma_lz_options * lz_options )

extern

lzma_lzma_decoder_init()

lzma_ret lzma_lzma_decoder_init ( lzma_next_coder * next, const lzma_allocator * allocator, const lzma_filter_info * filters )

extern

Allocates and initializes LZMA decoder.

lzma_lzma_decoder_memusage()

uint64_t lzma_lzma_decoder_memusage ( const void * options )

extern

lzma_lzma_decoder_memusage_nocheck()

uint64_t lzma_lzma_decoder_memusage_nocheck ( const void * options )

extern

lzma_lzma_lclppb_decode()

bool lzma_lzma_lclppb_decode ( lzma_options_lzma * options, uint8_t byte )

extern

Decodes the LZMA Properties byte (lc/lp/pb)

Returns

true if error occurred, false on success

lzma_lzma_props_decode()

lzma_ret lzma_lzma_props_decode ( void ** options, const lzma_allocator * allocator, const uint8_t * props, size_t props_size )

extern