ref: a4a975e8ac706cc2d9ef954c250b7ae4dd2e0e08
dir: /sys/man/2/venti-zero/
.TH VENTI-ZERO 2 .SH NAME vtzerotruncate, vtzeroextend, vtzeroscore \- Venti block truncation .SH SYNOPSIS .ft L #include <u.h> .br #include <libc.h> .br #include <venti.h> .ta +\w'\fLuint 'u .PP .B uint vtzerotruncate(int type, uchar *buf, uint size) .PP .B void vtzeroextend(int type, uchar *buf, uint size, uint newsize) .PP .B extern uchar vtzeroscore[VtScoreSize]; .SH 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. .PP .I Vtzerotruncate returns the size of the .IR size -byte buffer pointed to by .I buf ignoring trailing zeros or zero scores, according to the given .IR type . .PP .I Vtzeroextend pads .I buf with zeros or zero scores, according to the given .IR type , to grow it from .I size bytes to .I newsize bytes. .PP .I Vtzeroscore is the score of the zero-length block. .SH SOURCE .B /sys/src/libventi/zero.c .br .B /sys/src/libventi/zeroscore.c .SH SEE ALSO .IR venti (2), .IR venti (6)