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#!/usr/bin/env ruby
# Input is expected to follow the form found in IdnaMappingTable.txt
# from The Unicode Consortium
puts "# encoding: UTF-8\n\n"
map = {}
ARGF.each do |line|
# Copy full comment lines to output
puts line if line[0] == '#'
s = line.strip.split('#').first
next if s.nil?
p = s.split(';').map{|s| s.strip}
if p[1] == "ignored"
p[1] = "mapped"
p[2] = ""
end
next unless p[1] == "mapped" || p[1] == "disallowed_STD3_mapped"
dst = p[2].split(/\s+/).map do |hex|
hex.to_i(16)
end
if dst.length == 1
dst = dst.first
end
if p[0].include?('..')
a, b = p[0].split('..',2).map{|n|n.to_i(16)}
(a..b).each do |n|
map[n] = dst
end
else
src = p[0].to_i(16)
map[src] = dst
end
end
# Output final mapping data
puts
puts 'module SimpleIDN'
puts ' UTS64MAPPING = {'
map.each do |k, v|
puts " #{k} => #{v},"
end
puts ' }'
puts 'end'
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