base27.1

来自「基于图象的信息隐藏的C源码」· 1 代码 · 共 54 行

.TH BASE27 1 "04 Nov 1999" "0.2"
.UC 4
.SH NAME
base27 - converts text into a different base
.SH SYNOPSIS
.B base27 
[
.B \-d
] [
.B \-C
.I codestr
]
.I infile
>
.I outfile
.SH DESCRIPTION
.I base27
is intended to compress small amounts of textual data (under 100 characters)
by converting it to a different base -- by default this is base 27, meaning
it can encode all uppercase alphabetic characters and whitespace.  All lowercase
characters are uppercased, and characters that cannot be converted are stripped.
.PP
You can encode/decode different sets of characters by passing an argument to the
.B \-C
parameter; for instance passing 
.B \-C '01'
will encode/decode binary strings.
.SH OPTIONS
.TP 12
.B \-d
Decode text previously encoded using this program.
.TP
.B \-C
Set the
.I code string
to be used.  The number base is set to the number of
characters in this string. The default is "@ABCDEFGHIJKLMNOPQRSTUVWXYZ".
.TP
.B \-u
Do not convert to uppercase when encoding.
This would be used if lowercase characters were present in the code string.
.SH "SEE ALSO"
.PD
.BR stegparty (1)
.ne 5
.SH AUTHOR
.RS 5
.nf
Steven Hugg
[e-mail]
http://pobox.com/~hugg/
.fi
.RE