block_buffer_encoder.h File Reference

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

#include "common.h"

Go to the source code of this file.

Functions
uint64_t	lzma_block_buffer_bound64 (uint64_t uncompressed_size)

Detailed Description

Single-call .xz Block encoder.

Definition in file block_buffer_encoder.h.

Function Documentation

lzma_block_buffer_bound64()

uint64_t lzma_block_buffer_bound64

(

uint64_t

uncompressed_size

)

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.

Definition at line 56 of file block_buffer_encoder.c.

{
    // If the data doesn't compress, we always use uncompressed
    // LZMA2 chunks.
    uint64_t lzma2_size = lzma2_bound(uncompressed_size);
    if (lzma2_size == 0)
        return 0;
 
    // Take Block Padding into account.
    lzma2_size = (lzma2_size + 3) & ~UINT64_C(3);
 
    // No risk of integer overflow because lzma2_bound() already takes
    // into account the size of the headers in the Block.
    return HEADERS_BOUND + lzma2_size;
}

References HEADERS_BOUND, lzma2_bound(), UINT64_C, and uncompressed_size.

Referenced by get_options(), and LZMA_API().