VENTI-ZERO(2)VENTI-ZERO(2)NAME
vtzerotruncate, vtzeroextend, vtzeroscore - Venti block truncation
SYNOPSIS
#include <u.h>
#include <libc.h>
#include <venti.h>
uint vtzerotruncate(int type, uchar *buf, uint size)
void vtzeroextend(int type, uchar *buf, uint size, uint newsize)
extern uchar vtzeroscore[VtScoreSize];
DESCRIPTION
These utility functions compute how to truncate or replace trailing
zeros (for data blocks) or trailing zero scores (for pointer blocks) to
canonicalize the blocks before storing them to Venti.
Vtzerotruncate returns the size of the size-byte buffer pointed to by
buf ignoring trailing zeros or zero scores, according to the given
type.
Vtzeroextend pads buf with zeros or zero scores, according to the given
type, to grow it from size bytes to newsize bytes.
Vtzeroscore is the score of the zero-length block.
SOURCE
/sys/src/libventi/zero.c
/sys/src/libventi/zeroscore.c
SEE ALSOventi(2), venti(6)VENTI-ZERO(2)