Unpack binary files.

[dave]

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Hy list,


I would like to append to a ruby script a tarball and a license file.

Both are in the form:

# data........................................
# data........................................
# data........................................

How would you convert the tarball binary data?


The licence text should be centred in a 55 char space.




If I split the license text lines and then gsub(/\n/, '\n') them=20
i have a bad output:

[55 char]
# use pieces of it
# in new free programs; and that you know you can do


=2D----------------
x =3D 0
y =3D 54
lines =3D []

loop {
i =3D f[x..y]
break if i.nil?()
lines.push(("# " + i))
x +=3D 54
y +=3D 54
}

lines.each{|i| puts i }
=2D--------------


Tnx.


=2D-=20

here are more things in heaven and earth,

horatio, than are dreamt of in your philosophy.

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[daz]

Hy list,


I would like to append to a ruby script a tarball and a license file.

Both are in the form:

# data........................................

How would you convert the tarball binary data?

tar = "i6\253m\251e" # in: binary content
b64 = [tar].pack('m') # out: Base64 encoded string
p b64 #-> "aTarball\n"

If I split the license text lines and then gsub(/\n/, '\n') them
i have a bad output:

If you split on /\n/, the newline will disappear so it's
not now available to gsub.


What about this ?

# make some input data
licin = <<EOL
LIC ............A
LIC ............B
LIC ............C
EOL

licout = licin.map {|line| '# ' << line}
puts licout

# LIC ............A
# LIC ............B
# LIC ............C


daz

 

[dave]

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tar =3D "i6\253m\251e" =A0 =A0# in: =A0binary content
b64 =3D [tar].pack('m') =A0 # out: Base64 encoded string
p b64 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 #-> "aTarball\n"
excellent!


If you split on /\n/, the newline will disappear so it's
not now available to gsub.

I dont split on "\n".

I need to center the license text in a TextEdit Window, this widget
is 55 char large.
I split the file in lines of 55 char:

x =3D 0
y =3D 54
lines =3D []

loop {
i =3D f[x..y]
break if i.nil?()
lines.push(("# " + i))
x +=3D 55
y +=3D 55
}

lines.each{|i| puts i }


The problem 1 (tab related) is in centred input:
in:
[ tab space ] Gnu Gpl [ tab space ]| <- 70 char
|
out:
[ tab space ] Gnu Gpl [ tab ]| <- 55 char

So the output text is right aligned.
How can i center the text in a 55 char space?


The problem 2 (\n related) is in carriage return:
in:
bla bla bla ...................................bl
a
out:
bla bla bla ...
bl
a

Should i delete all "\n" that not follow a '.'?

=2D-=20

here are more things in heaven and earth,

horatio, than are dreamt of in your philosophy.

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[daz]

dave.m wrote:

I need to center the license text in a TextEdit Window, this widget
is 55 char large.
I split the file in lines of 55 char:


The problem 1 (tab related) is in centred input:
in:
[ tab space ] Gnu Gpl [ tab space ]| <- 70 char
|
out:
[ tab space ] Gnu Gpl [ tab ]| <- 55 char

So the output text is right aligned.
How can i center the text in a 55 char space?


The problem 2 (\n related) is in carriage return:
in:
bla bla bla ...................................bl
a
out:
bla bla bla ...
bl
a

Should i delete all "\n" that not follow a '.'?

No.
I think you should reformat gpl.txt in a text editor
so that it's exactly the way you want it to look.
Then display your new file in the widget ??

Otherwise you will be writing a text formatter


daz

 

[dave]

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Otherwise you will be writing a text formatter

Thank you again. I'll format the text

=2D-=20

here are more things in heaven and earth,

horatio, than are dreamt of in your philosophy.

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[Erik Veenstra]

I think you should reformat gpl.txt in a text editor so that

it's exactly the way you want it to look. Then display your
new file in the widget ??

Otherwise you will be writing a text formatter

I've once written this String#reformat. It might help you. I
added a test to the script.

gegroet,
Erik V. - http://www.erikveen.dds.nl/

----------------------------------------------------------------

class String
def wrap(width, prefix="", prefixoneveryline=true)
prefix = prefix.to_s
text = self.to_s
res = []

while not text.empty?
line = text[0..width-2-prefix.length]
line = text.gsub(/ .*/, "") unless line.include?(" ")
line = line.gsub(/ [^ ]*$/, "") unless line == text or text[line.length..-1] =~ /^ /

res << prefix + line

prefix = prefix.gsub(/./, " ") unless prefixoneveryline
text = text[line.length..-1]
text = text.gsub(/^ /, "")
end

text = res.join("\n")
end

def reformat(width, prefix="", prefixoneveryline=true)
paragraphs = self.split(/\s*\r*\n\r*\n[\r\n]*\s*/)
paragraphs.collect! do |paragraph|
paragraph.gsub!(/^[\r\n\s]+/, "")
paragraph.gsub!(/[\r\n\s]+$/, "")
paragraph.gsub!(/[\r\n\s]+/, " ")
paragraph.wrap(width, prefix, prefixoneveryline)
end
paragraphs.join("\n\n")
end
end

text = DATA.read

puts text.reformat(55, "# ")

__END__

Version 2, June 1991

Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General
Public License is intended to guarantee your freedom to share
and change free software--to make sure the software is free for
all its users. This General Public License applies to most of
the Free Software Foundation's software and to any other
program whose authors commit to using it. (Some other Free
Software Foundation software is covered by the GNU Library
General Public License instead.) You can apply it to your
programs, too.

When we speak of free software, we are referring to freedom,
not price. Our General Public Licenses are designed to make
sure that you have the freedom to distribute copies of free
software (and charge for this service if you wish), that you
receive source code or can get it if you want it, that you can
change the software or use pieces of it in new free programs;
and that you know you can do these things.

.................................................................

 

[dave]

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I've once written this String#reformat. It might help you. I
added a test to the script.

very, very, good!

*I changed paragraphs.join("\n\n") to paragraphs.join("\n#\n") and
now it's perfect.

=2D-=20

here are more things in heaven and earth,

horatio, than are dreamt of in your philosophy.

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[Erik Veenstra]

I've once written this String#reformat. It might help you.

very, very, good!

*I changed paragraphs.join("\n\n") to
paragraphs.join("\n#\n") and now it's perfect.

Use the prefix: paragraphs.join("\n#{prefix}\n")

gegroet,
Erik V. - http://www.erikveen.dds.nl/