block_buffer_encoder.c File Reference

Single-call .xz Block encoder. More...

#include "block_buffer_encoder.h"
#include "block_encoder.h"
#include "filter_encoder.h"
#include "lzma2_encoder.h"
#include "check.h"

Macros
#define	HEADERS_BOUND

Functions
uint64_t	lzma_block_buffer_bound64 (uint64_t uncompressed_size)
	LZMA_API (size_t)
	Calculate maximum output size for single-call Block encoding.
	LZMA_API (lzma_ret)

Detailed Description

Single-call .xz Block encoder.

Macro Definition Documentation

HEADERS_BOUND

#define HEADERS_BOUND

Value:

        ((1 + 1 + 2 * LZMA_VLI_BYTES_MAX + 3 + 4 \
        + LZMA_CHECK_SIZE_MAX + 3) & ~3)

Estimate the maximum size of the Block Header and Check fields for a Block that uses LZMA2 uncompressed chunks. We could use lzma_block_header_size() but this is simpler.

Block Header Size + Block Flags + Compressed Size

• Uncompressed Size + Filter Flags for LZMA2 + CRC32 + Check and round up to the next multiple of four to take Header Padding into account.

Function Documentation

LZMA_API() [1/2]

LZMA_API ( lzma_ret )

extern

LZMA_API() [2/2]

LZMA_API ( size_t )

extern

Calculate maximum output size for single-call Block encoding.

Calculate output buffer size for single-call Stream encoder.

This is equivalent to lzma_stream_buffer_bound() but for .xz Blocks. See the documentation of lzma_stream_buffer_bound().

lzma_block_buffer_bound64()

uint64_t lzma_block_buffer_bound64 ( uint64_t uncompressed_size )

extern

uint64_t version of lzma_block_buffer_bound(). It is used by stream_encoder_mt.c. Probably the original lzma_block_buffer_bound() should have been 64-bit, but fixing it would break the ABI.