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# -*- encoding: utf-8 -*-
require "unicode_utils/read_cdata"
module UnicodeUtils
SIMPLE_DOWNCASE_MAP = Impl.read_code_point_map("simple_lc_map") # :nodoc:
# Map each code point in +str+ that has a single code point
# lowercase-mapping to that lowercase mapping. The returned string
# has the same length as the original string.
#
# This function is locale independent.
#
# Examples:
#
# require "unicode_utils/simple_downcase"
# UnicodeUtils.simple_downcase("ÜMIT: 123") => "ümit: 123"
# UnicodeUtils.simple_downcase("STRASSE") => "strasse"
def simple_downcase(str)
String.new.force_encoding(str.encoding).tap { |res|
str.each_codepoint { |cp|
res << (SIMPLE_DOWNCASE_MAP[cp] || cp)
}
}
end
module_function :simple_downcase
end
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