LocalJumpError


#1

Hi,

Because ruby-libexif no longer works with libexif-0.6.12, I decided to
roll
my own Exif class.
Quick and dirty.
And got a surprising error message.

Here’s the program:
#!/usr/bin/ruby

#require ‘exif’

class Exif < Hash
@@want = %w{ DateTimeOriginal DateTime ImageDescription
PixelYDimension }
def initialize(file)

IO.popen("exiv2 -pt '#{file}'") do |h|
  h.each do |line|
    a = line.split[0].split(/\./)[2].strip
    if @@want.include?(a)
      self[a] = line[60 .. -1].strip
    end
  end
end

end
end

def run
exif = Exif.new(’/var/pictures/alpujaras/img_0528_edited.jpg’)
puts exif[‘DateTimeOriginal’]
exif = Exif.new(’/bin/ls’)
puts exif[‘DateTimeOriginal’]
next if exif.empty?
puts “won’t get here”
end

run

End-of-ruby-program

If I run this, I get:
2005:01:04 13:22:48
Exiv2 exception in print action for file /bin/ls:
/bin/ls: The file contains data of an unknown image type
nil
./add_captions.rb:25:in `run’: unexpected next (LocalJumpError)
from ./add_captions.rb:29

For a real JPEG it works fine, but things get ugly otherwise:

I can’t quite figure out what this means.

Cheers,

Han H.


#2

Please cancel this.