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45f847d01e
This checks if the character needs to be counted as double-width (for soft wrap and similar).
I used the following script to generate the tables, it should be improved to collapse the ranges:
#!/usr/bin/ruby
fixed, start, stop = [ ], [ ], [ ]
open('|curl -Ls http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt') do |io|
io.grep(/^([0-9A-F]+)(?:..([0-9A-F]+))?;[A-Za-z]*W/) do
if $2
start << "0x#$1"
stop << "0x#$2"
else
fixed << "0x#$1"
end
end
end
puts "static uint32_t Fixed[] = { #{fixed.join(', ')} };\n"
puts "static uint32_t RangeBegin[] = { #{start.join(', ')} };\n"
puts "static uint32_t RangeEnd[] = { #{stop.join(', ')} };\n"