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# Copyright (C) 2013 Kouhei Sutou <kou@clear-code.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
require "English"
module Unicode
module_function
def to_utf8(code_point)
[code_point].pack("U")
end
def from_utf8(utf8)
utf8.unpack("U")[0]
end
end
class CTypeUTF8Parser
def initialize
@pages = {}
end
def parse(input)
parse_ctype_utf8(input)
normalize_pages
end
def sorted_pages
@pages.sort_by do |page, characters|
page
end
end
private
def parse_ctype_utf8(input)
current_page = nil
input.each_line do |line|
case line
when / plane([\da-fA-F]{2})\[\]=/
current_page = $1.to_i(16)
@pages[current_page] = []
when /^\s*
\{0x([\da-z]+),0x([\da-z]+),0x([\da-z]+)\},
\s*
\{0x([\da-z]+),0x([\da-z]+),0x([\da-z]+)\},?$/ix
next if current_page.nil?
parsed_characters = $LAST_MATCH_INFO.captures.collect do |value|
Unicode.to_utf8(value.to_i(16))
end
upper1, lower1, sort1, upper2, lower2, sort2 = parsed_characters
characters = @pages[current_page]
characters << {:upper => upper1, :lower => lower1, :sort => sort1}
characters << {:upper => upper2, :lower => lower2, :sort => sort2}
when /^\};$/
current_page = nil
end
end
end
def normalize_pages
@pages.each do |page, characters|
characters.each_with_index do |character, i|
character[:base] = Unicode.to_utf8((page << 8) + i)
end
end
end
end
class CTypeUCAParser
attr_reader :pages
def initialize
@pages = {}
@lengths = []
end
def parse(input)
parse_ctype_uca(input)
normalize_pages
end
def weight_based_characters
weight_based_characters = {}
sorted_pages.each do |page, characters|
characters.each do |character|
weight = character[:weight]
weight_based_characters[weight] ||= []
weight_based_characters[weight] << character
end
end
weight_based_characters
end
def sorted_pages
@pages.sort_by do |page, characters|
page
end
end
private
def parse_ctype_uca(input)
current_page = nil
in_length = false
input.each_line do |line|
case line
when / page([\da-fA-F]{3})data\[\]=/
current_page = $1.to_i(16)
@pages[current_page] = []
when /^\s*0x(?:[\da-z]+)(?:,\s*0x(?:[\da-z]+))*,?$/i
next if current_page.nil?
weights = line.chomp.split(/,\s*/).collect do |component|
Integer(component)
end
@pages[current_page].concat(weights)
when / uca_length\[256\]=/
in_length = true
when /^\d+(?:,\d+)*,?$/
next unless in_length
current_lengths = line.chomp.split(/,/).collect do |length|
Integer(length)
end
@lengths.concat(current_lengths)
when /^\};$/
current_page = nil
in_length = false
end
end
end
def normalize_pages
@pages.each do |page, flatten_weights|
weights = flatten_weights.each_slice(@lengths[page])
@pages[page] = weights.with_index.collect do |weight, i|
if weight.all?(&:zero?)
weight = [0]
else
while weight.last.zero?
weight.pop
end
end
code_point = (page << 8) + i
{
:weight => weight,
:code_point => code_point,
:utf8 => Unicode.to_utf8(code_point),
}
end
end
end
end
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