fastpos.h File Reference

Kind of two-bit version of bit scan reverse. More...

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Macros
#define	FASTPOS_BITS   13
#define	fastpos_shift(extra, n)
#define	fastpos_limit(extra, n)
#define	fastpos_result(dist, extra, n)

Variables
const uint8_t	lzma_fastpos [1<< FASTPOS_BITS]

Detailed Description

Kind of two-bit version of bit scan reverse.

Macro Definition Documentation

FASTPOS_BITS

#define FASTPOS_BITS   13

fastpos_limit

#define fastpos_limit	(		extra,
			n )

Value:

    (UINT32_C(1) << (FASTPOS_BITS + fastpos_shift(extra, n)))

fastpos_result

#define fastpos_result	(		dist,
			extra,
			n )

Value:

    (uint32_t)(lzma_fastpos[(dist) >> fastpos_shift(extra, n)]) \
            + 2 * fastpos_shift(extra, n)

fastpos_shift

#define fastpos_shift	(		extra,
			n )

Value:

    ((extra) + (n) * (FASTPOS_BITS - 1))

Variable Documentation

lzma_fastpos

const uint8_t lzma_fastpos[1<< FASTPOS_BITS]

extern