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.TH VCDIFF "1" "August 2008" "vcdiff" "open-vcdiff"
.SH NAME
vcdiff \- encoder/decoder for VCDIFF (RFC 3284) format
.SH DESCRIPTION
.HP
\fBvcdiff\fR  {\fBencode\fR|\fBdelta\fR|\fBdecode\fR|\fBpatch\fR}
\fB\-dictionary\fR <filename>
[<options>]
.HP
\fBencode\fR or \fBdelta\fR:
create delta file from dictionary and target file
.HP
\fBdecode\fR or \fBpatch\fR:
reconstruct target file from dictionary and delta file
.HP
\fB\-dictionary\fR <filename>
.br
File containing dictionary data (also known as source data.)
Required for all operations.
.HP
\fB\-target\fR <filename>
.br
File name of the target file (unencoded data).
The default value (blank) causes vcdiff to use standard input for encode,
or standard output for decode.
.HP
\fB\-delta\fR <filename>
.br
File name of the delta file (encoded data).
The default value (blank) causes vcdiff to use standard output for encode,
or standard input for decode.
.HP
\fB\-checksum\fR
.br
Include an Adler32 checksum of the target data when encoding.
Default is false.
.HP
\fB\-interleaved\fR
.br
Use interleaved format.  Default is false.
.HP
\fB\-stats\fR
.br
Write a report to stderr, containing the original target size,
compressed delta size, and compression percentage.
Default is false.
.HP
\fB\-target_matches\fR
.br
Find duplicate strings in target data as well as dictionary data.
Default is false.
.HP
\fB\-buffersize\fR <integer>
.br
The memory buffer size (in bytes) used for reading the input file.
Default is 1048576 (1 MB); if the input file is smaller than that,
the buffer will match the file size.  This parameter does not usually
need to be specified.
.SH "SEE ALSO"
Further documentation for
.B open-vcdiff
can be found online at
.B https://github.com/google/open-vcdiff
.PP