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# -*- encoding: utf-8 -*-
module UnicodeUtils
# Absolute path to the directory from which UnicodeUtils loads its
# compiled Unicode data files at runtime.
CDATA_DIR = File.absolute_path(File.join(File.dirname(__FILE__), "..", "..", "cdata"))
module Impl # :nodoc:
EAST_ASIAN_WIDTH_SYMBOL_MAP = {
1 => :Ambiguous,
2 => :Halfwidth,
3 => :Wide,
4 => :Fullwidth,
5 => :Narrow
}.freeze
NAME_ALIAS_TYPE_TO_SYMBOL_MAP = {
1 => :correction,
2 => :control,
3 => :alternate,
4 => :figment,
5 => :abbreviation
}.freeze
def self.open_cdata_file(filename, &block)
File.open(File.join(CDATA_DIR, filename), "r:US-ASCII:-", &block)
end
def self.read_code_point_set(filename)
Hash.new.tap { |set|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
set[buffer.to_i(16)] = true
end
end
}
end
def self.read_code_point_map(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
map[buffer.to_i(16)] = input.read(6, buffer).to_i(16)
end
end
}
end
def self.read_multivalued_map(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
cp = buffer.to_i(16)
mapping = []
while input.read(6, buffer).getbyte(0) != 120
mapping << buffer.to_i(16)
end
map[cp] = mapping
end
end
}
end
def self.read_names(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
map[buffer.to_i(16)] = input.gets.tap { |x| x.chomp! }
end
end
}
end
def self.read_conditional_casings(filename)
Hash.new.tap { |cp_map|
open_cdata_file(filename) do |input|
input.each_line { |line|
line.chomp!
record = line.split(";")
cp = record[0].to_i(16)
mapping = record[1].split(",").map { |c| c.to_i(16) }
language_id = record[2].empty? ? nil : record[2].to_sym
context = record[3] && record[3].gsub('_', '')
casing = Impl.const_get("#{context}ConditionalCasing").new(mapping)
(cp_map[cp] ||= {})[language_id] = casing
}
end
}
end
def self.read_combining_class_map
Hash.new.tap { |map|
open_cdata_file("combining_class_map") do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
cc_buffer = "x" * 2
cc_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
map[buffer.to_i(16)] = input.read(2, cc_buffer).to_i(16)
end
end
}
end
# Read a map whose keys are code points (6 hexgdigits, converted to
# integer) and whose values are single hexdigits (converted to
# integer).
def self.read_hexdigit_map(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
val_buffer = "x"
val_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
map[buffer.to_i(16)] = input.read(1, val_buffer).to_i(16)
end
end
}
end
# Returns a list (array) of pairs (two element Arrays) of Range
# (code points) and associated integer value.
def self.read_range_to_hexdigit_list(filename)
Array.new.tap { |list|
open_cdata_file(filename) do |input|
cp_buffer = "x" * 6
cp_buffer.force_encoding(Encoding::US_ASCII)
val_buffer = "x"
val_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, cp_buffer)
list << [
Range.new(cp_buffer.to_i(16), input.read(6, cp_buffer).to_i(16)),
input.read(1, val_buffer).to_i(16)
]
end
end
}
end
def self.read_east_asian_width_per_cp(filename)
# like read_hexdigit_map, but with translation to symbol values
Hash.new(:Neutral).tap { |map|
open_cdata_file(filename) do |input|
buffer = "x" * 6
buffer.force_encoding(Encoding::US_ASCII)
val_buffer = "x"
val_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, buffer)
map[buffer.to_i(16)] =
EAST_ASIAN_WIDTH_SYMBOL_MAP[input.read(1, val_buffer).to_i(16)]
end
end
}
end
def self.read_east_asian_width_ranges(filename)
read_range_to_hexdigit_list(filename).tap { |list|
list.each { |pair|
pair[1] = EAST_ASIAN_WIDTH_SYMBOL_MAP[pair[1]]
}
}
end
def self.read_general_category_per_cp(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
cp_buffer = "x" * 6
cp_buffer.force_encoding(Encoding::US_ASCII)
cat_buffer = "x" * 2
cat_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, cp_buffer)
map[cp_buffer.to_i(16)] = input.read(2, cat_buffer).to_sym
end
end
}
end
def self.read_general_category_ranges(filename)
Array.new.tap { |list|
open_cdata_file(filename) do |input|
cp_buffer = "x" * 6
cp_buffer.force_encoding(Encoding::US_ASCII)
cat_buffer = "x" * 2
cat_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, cp_buffer)
list << [
Range.new(cp_buffer.to_i(16), input.read(6, cp_buffer).to_i(16)),
input.read(2, cat_buffer).to_sym
]
end
end
}
end
def self.read_symbol_map(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
input.each_line { |line|
parts = line.split(";")
parts[0].strip!
parts[1].strip!
map[parts[0].to_sym] = parts[1].to_sym
}
end
}
end
def self.read_name_aliases(filename)
Hash.new.tap { |map|
open_cdata_file(filename) do |input|
cp_buffer = "x" * 6
cp_buffer.force_encoding(Encoding::US_ASCII)
ac_buffer = "x" * 1
ac_buffer.force_encoding(Encoding::US_ASCII)
at_buffer = "x" * 1
at_buffer.force_encoding(Encoding::US_ASCII)
al_buffer = "x" * 2
al_buffer.force_encoding(Encoding::US_ASCII)
while input.read(6, cp_buffer)
aliases = Array.new(input.read(1, ac_buffer).to_i(16))
0.upto(aliases.length - 1) { |i|
type = NAME_ALIAS_TYPE_TO_SYMBOL_MAP[input.read(1, at_buffer).to_i(16)]
name = input.read(input.read(2, al_buffer).to_i(16))
aliases[i] = NameAlias.new(name.freeze, type)
}
map[cp_buffer.to_i(16)] = aliases.freeze
end
end
}
end
end
end
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