Variable: tramp-perl-decode

tramp-perl-decode is a variable defined in tramp-sh.el.gz.

Value

"%p -e '\nuse strict;\n\nmy %%trans = do {\n    my $i = 0;\n    map {($_, substr(unpack(q(B8), chr $i++), 2, 6))}\n      split //, q(ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/)\n};\n\nmy %%bytes = map {(unpack(q(B8), chr $_), chr $_)} 0 .. 255;\n\nbinmode(\\*STDOUT);\n\n# We are going to accumulate into $pending to accept any line length\n# (we do not check they are <= 76 chars as the RFC says)\nmy $pending = q();\n\nwhile (my $data = <STDIN>) {\n    chomp $data;\n\n    # If we find one or two =, we have reached the end and\n    # any following data is to be discarded\n    my $finished = $data =~ s/(==?).*/$1/;\n    $pending .= $data;\n\n    my $len = length($pending);\n    my $chunk = substr($pending, 0, $len & ~3);\n    $pending = substr($pending, $len & ~3 + 1);\n\n    # Easy method: translate from chars to (pregenerated) six-bit packets, join,\n    # split in 8-bit chunks and convert back to char.\n    print join q(),\n      map $bytes{$_},\n        ((join q(), map {$trans{$_} || q()} split //, $chunk) =~ /......../g);\n\n    last if $finished;\n}' %n"

Documentation

Perl program to use for decoding a file.

Format specifiers are replaced by tramp-expand-script, percent characters need to be doubled.

Source Code

;; Defined in /usr/src/emacs/lisp/net/tramp-sh.el.gz
;; This script contributed by Juanma Barranquero <lektu@terra.es>.
(defconst tramp-perl-decode "\
%p -e '
use strict;

my %%trans = do {
    my $i = 0;
    map {($_, substr(unpack(q(B8), chr $i++), 2, 6))}
      split //, q(ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/)
};

my %%bytes = map {(unpack(q(B8), chr $_), chr $_)} 0 .. 255;

binmode(\\*STDOUT);

# We are going to accumulate into $pending to accept any line length
# (we do not check they are <= 76 chars as the RFC says)
my $pending = q();

while (my $data = <STDIN>) {
    chomp $data;

    # If we find one or two =, we have reached the end and
    # any following data is to be discarded
    my $finished = $data =~ s/(==?).*/$1/;
    $pending .= $data;

    my $len = length($pending);
    my $chunk = substr($pending, 0, $len & ~3);
    $pending = substr($pending, $len & ~3 + 1);

    # Easy method: translate from chars to (pregenerated) six-bit packets, join,
    # split in 8-bit chunks and convert back to char.
    print join q(),
      map $bytes{$_},
        ((join q(), map {$trans{$_} || q()} split //, $chunk) =~ /......../g);

    last if $finished;
}' %n"
  "Perl program to use for decoding a file.
Format specifiers are replaced by `tramp-expand-script', percent
characters need to be doubled.")