lzma_literal

Name:Decode a literal (one 8-bit byte)

Proto:static void lzma_literal(struct xz_dec_lzma2 *s)

Type:void

Parameter:

Type	Parameter	Name
struct xz_dec_lzma2 *	s

590

probs = Get pointer to literal coder probability array.

592

If Test if the previous symbol was a literal. Then

593

symbol = Decode a bittree starting from the most significant bit.

594

Else

595

symbol = 1

596

match_byte = Get a byte from the dictionary at the given distance. The distance is* assumed to valid, or as a special case, zero when the dictionary is* still empty. This special case is needed for single-call decoding to << 1

597

offset = 0x100

599

Do

600

match_bit = match_byte & offset

601

match_byte <<= 1

602

i = offset + match_bit + symbol

604

If Decode one bit. In some versions, this function has been splitted in three* functions so that the compiler is supposed to be able to more easily avoid* an extra branch. In this particular version of the LZMA decoder, this Then

605

symbol = (symbol << 1) + 1

606

offset &= match_bit

607

Else

608

symbol <<= 1

609

offset &= ~match_bit

611

When symbol < 0x100 cycle

614

Put one byte into the dictionary. It is assumed that there is space for it.

615

Indicate that the latest symbol was a literal.

**Caller**
Name	Describe
lzma_main	LZMA decoder core

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion