/usr/share/amsn/utils/base64/uuencode.tcl is in amsn-data 0.98.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 | # uuencode - Copyright (C) 2002 Pat Thoyts <patthoyts@users.sourceforge.net>
#
# Provide a Tcl only implementation of uuencode and uudecode.
#
# -------------------------------------------------------------------------
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
# -------------------------------------------------------------------------
# @(#)$Id: uuencode.tcl 3433 2004-12-03 15:51:40Z germinator2000 $
package require Tcl 8.2; # tcl minimum version
package require log; # tcllib 1.0
namespace eval ::uuencode {
variable version 1.0.2
namespace export encode decode uuencode uudecode
}
proc ::uuencode::Enc {c} {
return [format %c [expr {($c != 0) ? (($c & 0x3f) + 0x20) : 0x60}]]
}
proc ::uuencode::Encode {s} {
set r {}
binary scan $s c* d
foreach {c1 c2 c3} $d {
if {$c1 == {}} {set c1 0}
if {$c2 == {}} {set c2 0}
if {$c3 == {}} {set c3 0}
append r [Enc [expr {$c1 >> 2}]]
append r [Enc [expr {(($c1 << 4) & 060) | (($c2 >> 4) & 017)}]]
append r [Enc [expr {(($c2 << 2) & 074) | (($c3 >> 6) & 003)}]]
append r [Enc [expr {($c3 & 077)}]]
}
return $r
}
proc ::uuencode::Decode {s} {
if {[string length $s] == 0} {return ""}
set r {}
binary scan [pad $s] c* d
foreach {c0 c1 c2 c3} $d {
append r [format %c [expr {((($c0-0x20)&0x3F) << 2) & 0xFF
| ((($c1-0x20)&0x3F) >> 4) & 0xFF}]]
append r [format %c [expr {((($c1-0x20)&0x3F) << 4) & 0xFF
| ((($c2-0x20)&0x3F) >> 2) & 0xFF}]]
append r [format %c [expr {((($c2-0x20)&0x3F) << 6) & 0xFF
| (($c3-0x20)&0x3F) & 0xFF}]]
}
return $r
}
# -------------------------------------------------------------------------
# Description:
# Permit more tolerant decoding of invalid input strings by padding to
# a multiple of 4 bytes with nulls.
# Result:
# Returns the input string - possibly padded with uuencoded null chars.
#
proc ::uuencode::pad {s} {
if {[set mod [expr {[string length $s] % 4}]] != 0} {
log::log notice "invalid uuencoded string: padding string to a\
multiple of 4."
append s [string repeat "`" [expr {4 - $mod}]]
}
return $s
}
# -------------------------------------------------------------------------
# If the Trf package is available then we shall use this by default but the
# Tcllib implementations are always visible if needed (ie: for testing)
if {[catch {package require Trf 2.0}]} {
interp alias {} ::uuencode::encode {} ::uuencode::Encode
interp alias {} ::uuencode::decode {} ::uuencode::Decode
} else {
proc ::uuencode::encode {s} {
return [::uuencode -mode encode -- $s]
}
proc ::uuencode::decode {s} {
return [::uuencode -mode decode -- [pad $s]]
}
}
# -------------------------------------------------------------------------
proc ::uuencode::uuencode {args} {
array set opts {mode 0644 filename {} name {}}
while {[string match -* [lindex $args 0]]} {
switch -glob -- [lindex $args 0] {
-f* {
set opts(filename) [lindex $args 1]
set args [lreplace $args 0 0]
}
-m* {
set opts(mode) [lindex $args 1]
set args [lreplace $args 0 0]
}
-n* {
set opts(name) [lindex $args 1]
set args [lreplace $args 0 0]
}
-- {
set args [lreplace $args 0 0]
break
}
default {
return -code error "bad option [lindex $args 0]:\
must be -filename or -mode"
}
}
set args [lreplace $args 0 0]
}
if {$opts(name) == {}} {
set opts(name) $opts(filename)
}
if {$opts(name) == {}} {
set opts(name) "data.dat"
}
if {$opts(filename) != {}} {
set f [open $opts(filename) r]
fconfigure $f -translation binary
set data [read $f]
close $f
} else {
if {[llength $args] != 1} {
return -code error "wrong \# args: should be\
\"uuencode ?-mode oct? -file name | data\""
}
set data [lindex $args 0]
}
set r {}
append r [format "begin %o %s" $opts(mode) $opts(name)] "\n"
for {set n 0} {$n < [string length $data]} {incr n 45} {
set s [string range $data $n [expr {$n + 44}]]
append r [Enc [string length $s]]
append r [encode $s] "\n"
}
append r "`\nend"
return $r
}
# -------------------------------------------------------------------------
# Description:
# Perform uudecoding of a file or data. A file may contain more than one
# encoded data section so the result is a list where each element is a
# three element list of the provided filename, the suggested mode and the
# data itself.
#
proc ::uuencode::uudecode {args} {
array set opts {mode 0644 filename {}}
while {[string match -* [lindex $args 0]]} {
switch -glob -- [lindex $args 0] {
-f* {
set opts(filename) [lindex $args 1]
set args [lreplace $args 0 0]
}
-- {
set args [lreplace $args 0 0]
break
}
default {
return -code error "bad option [lindex $args 0]:\
must be -filename or -mode"
}
}
set args [lreplace $args 0 0]
}
if {$opts(filename) != {}} {
set f [open $opts(filename) r]
set data [read $f]
close $f
} else {
if {[llength $args] != 1} {
return -code error "wrong \# args: should be\
\"uudecode -file name | data\""
}
set data [lindex $args 0]
}
set state false
set result {}
foreach {line} [split $data "\n"] {
switch -exact -- $state {
false {
if {[regexp {^begin ([0-7]+) ([^\s]*)} $line \
-> opts(mode) opts(name)]} {
set state true
set r {}
}
}
true {
if {[string match "end" $line]} {
set state false
lappend result [list $opts(name) $opts(mode) $r]
} else {
scan $line %c c
set n [expr {($c - 0x21)}]
append r [string range \
[decode [string range $line 1 end]] 0 $n]
}
}
}
}
return $result
}
# -------------------------------------------------------------------------
package provide uuencode $::uuencode::version
# -------------------------------------------------------------------------
#
# Local variables:
# mode: tcl
# indent-tabs-mode: nil
# End:
|