module Addressable::IDNA
Constants
- ACE_MAX_LENGTH
- ACE_PREFIX
- COMPOSITION_TABLE
- HANGUL_LBASE
- HANGUL_LCOUNT
- HANGUL_NCOUNT
- HANGUL_SBASE
- HANGUL_SCOUNT
- HANGUL_TBASE
- HANGUL_TCOUNT
- HANGUL_VBASE
- HANGUL_VCOUNT
- PUNYCODE_BASE
- PUNYCODE_DAMP
- PUNYCODE_DELIMITER
- PUNYCODE_INITIAL_BIAS
- PUNYCODE_INITIAL_N
- PUNYCODE_MAXINT
- PUNYCODE_PRINT_ASCII
- PUNYCODE_SKEW
- PUNYCODE_TMAX
- PUNYCODE_TMIN
- UNICODE_DATA
This is a sparse Unicode table. Codepoints without entries are assumed to have the value: [0, 0, nil, nil, nil, nil, nil]
- UNICODE_DATA_CANONICAL
- UNICODE_DATA_COMBINING_CLASS
- UNICODE_DATA_COMPATIBILITY
- UNICODE_DATA_EXCLUSION
- UNICODE_DATA_LOWERCASE
- UNICODE_DATA_TITLECASE
- UNICODE_DATA_UPPERCASE
- UNICODE_MAX_LENGTH
- UNICODE_TABLE
This module is loosely based on idn_actionmailer by Mick Staugaard, the unicode library by Yoshida Masato, and the punycode implementation by Kazuhiro Nishiyama. Most of the code was copied verbatim, but some reformatting was done, and some translation from C was done.
Without their code to work from as a base, we'd all still be relying on the presence of libidn. Which nobody ever seems to have installed.
Original sources: github.com/staugaard/idn_actionmailer www.yoshidam.net/Ruby.html#unicode rubyforge.org/frs/?group_id=2550
- UTF8_REGEX
- UTF8_REGEX_MULTIBYTE
Public Class Methods
# File lib/addressable/idna/native.rb, line 34 def self.to_ascii(value) value.to_s.split('.', -1).map do |segment| if segment.size > 0 && segment.size < 64 IDN::Idna.toASCII(segment, IDN::Idna::ALLOW_UNASSIGNED) elsif segment.size >= 64 segment else '' end end.join('.') end
# File lib/addressable/idna/native.rb, line 46 def self.to_unicode(value) value.to_s.split('.', -1).map do |segment| if segment.size > 0 && segment.size < 64 IDN::Idna.toUnicode(segment, IDN::Idna::ALLOW_UNASSIGNED) elsif segment.size >= 64 segment else '' end end.join('.') end
# File lib/addressable/idna/native.rb, line 30 def self.unicode_normalize_kc(value) IDN::Stringprep.nfkc_normalize(value.to_s) end
Private Class Methods
# File lib/addressable/idna/pure.rb, line 281 def self.lookup_unicode_combining_class(codepoint) codepoint_data = UNICODE_DATA[codepoint] (codepoint_data ? (codepoint_data[UNICODE_DATA_COMBINING_CLASS] || 0) : 0) end
# File lib/addressable/idna/pure.rb, line 289 def self.lookup_unicode_compatibility(codepoint) codepoint_data = UNICODE_DATA[codepoint] (codepoint_data ? codepoint_data[UNICODE_DATA_COMPATIBILITY] : nil) end
# File lib/addressable/idna/pure.rb, line 304 def self.lookup_unicode_composition(unpacked) return COMPOSITION_TABLE[unpacked] end
# File lib/addressable/idna/pure.rb, line 296 def self.lookup_unicode_lowercase(codepoint) codepoint_data = UNICODE_DATA[codepoint] (codepoint_data ? (codepoint_data[UNICODE_DATA_LOWERCASE] || codepoint) : codepoint) end
Bias adaptation method
# File lib/addressable/idna/pure.rb, line 659 def self.punycode_adapt(delta, numpoints, firsttime) delta = firsttime ? delta / PUNYCODE_DAMP : delta >> 1 # delta >> 1 is a faster way of doing delta / 2 delta += delta / numpoints difference = PUNYCODE_BASE - PUNYCODE_TMIN k = 0 while delta > (difference * PUNYCODE_TMAX) / 2 delta /= difference k += PUNYCODE_BASE end k + (difference + 1) * delta / (delta + PUNYCODE_SKEW) end
# File lib/addressable/idna/pure.rb, line 627 def self.punycode_basic?(codepoint) codepoint < 0x80 end
# File lib/addressable/idna/native.rb, line 26 def self.punycode_decode(value) IDN::Punycode.decode(value.to_s) end
Returns the numeric value of a basic codepoint (for use in representing integers) in the range 0 to base - 1, or PUNYCODE_BASE if codepoint does not represent a value.
# File lib/addressable/idna/pure.rb, line 645 def self.punycode_decode_digit(codepoint) if codepoint - 48 < 10 codepoint - 22 elsif codepoint - 65 < 26 codepoint - 65 elsif codepoint - 97 < 26 codepoint - 97 else PUNYCODE_BASE end end
# File lib/addressable/idna/pure.rb, line 632 def self.punycode_delimiter?(codepoint) codepoint == PUNYCODE_DELIMITER end
# File lib/addressable/idna/native.rb, line 22 def self.punycode_encode(value) IDN::Punycode.encode(value.to_s) end
# File lib/addressable/idna/pure.rb, line 637 def self.punycode_encode_digit(d) d + 22 + 75 * ((d < 26) ? 1 : 0) end
# File lib/addressable/idna/pure.rb, line 137 def self.unicode_compose(unpacked) unpacked_result = [] length = unpacked.length return unpacked if length == 0 starter = unpacked[0] starter_cc = lookup_unicode_combining_class(starter) starter_cc = 256 if starter_cc != 0 for i in 1...length ch = unpacked[i] cc = lookup_unicode_combining_class(ch) if (starter_cc == 0 && (composite = unicode_compose_pair(starter, ch)) != nil) starter = composite startercc = lookup_unicode_combining_class(composite) else unpacked_result << starter starter = ch startercc = cc end end unpacked_result << starter return unpacked_result end
# File lib/addressable/idna/pure.rb, line 165 def self.unicode_compose_pair(ch_one, ch_two) if ch_one >= HANGUL_LBASE && ch_one < HANGUL_LBASE + HANGUL_LCOUNT && ch_two >= HANGUL_VBASE && ch_two < HANGUL_VBASE + HANGUL_VCOUNT # Hangul L + V return HANGUL_SBASE + ( (ch_one - HANGUL_LBASE) * HANGUL_VCOUNT + (ch_two - HANGUL_VBASE) ) * HANGUL_TCOUNT elsif ch_one >= HANGUL_SBASE && ch_one < HANGUL_SBASE + HANGUL_SCOUNT && (ch_one - HANGUL_SBASE) % HANGUL_TCOUNT == 0 && ch_two >= HANGUL_TBASE && ch_two < HANGUL_TBASE + HANGUL_TCOUNT # Hangul LV + T return ch_one + (ch_two - HANGUL_TBASE) end p = [] ucs4_to_utf8 = lambda do |ch| if ch < 128 p << ch elsif ch < 2048 p << (ch >> 6 | 192) p << (ch & 63 | 128) elsif ch < 0x10000 p << (ch >> 12 | 224) p << (ch >> 6 & 63 | 128) p << (ch & 63 | 128) elsif ch < 0x200000 p << (ch >> 18 | 240) p << (ch >> 12 & 63 | 128) p << (ch >> 6 & 63 | 128) p << (ch & 63 | 128) elsif ch < 0x4000000 p << (ch >> 24 | 248) p << (ch >> 18 & 63 | 128) p << (ch >> 12 & 63 | 128) p << (ch >> 6 & 63 | 128) p << (ch & 63 | 128) elsif ch < 0x80000000 p << (ch >> 30 | 252) p << (ch >> 24 & 63 | 128) p << (ch >> 18 & 63 | 128) p << (ch >> 12 & 63 | 128) p << (ch >> 6 & 63 | 128) p << (ch & 63 | 128) end end ucs4_to_utf8.call(ch_one) ucs4_to_utf8.call(ch_two) return lookup_unicode_composition(p) end
# File lib/addressable/idna/pure.rb, line 243 def self.unicode_decompose(unpacked) unpacked_result = [] for cp in unpacked if cp >= HANGUL_SBASE && cp < HANGUL_SBASE + HANGUL_SCOUNT l, v, t = unicode_decompose_hangul(cp) unpacked_result << l unpacked_result << v if v unpacked_result << t if t else dc = lookup_unicode_compatibility(cp) unless dc unpacked_result << cp else unpacked_result.concat(unicode_decompose(dc.unpack("U*"))) end end end return unpacked_result end
# File lib/addressable/idna/pure.rb, line 264 def self.unicode_decompose_hangul(codepoint) sindex = codepoint - HANGUL_SBASE; if sindex < 0 || sindex >= HANGUL_SCOUNT l = codepoint v = t = nil return l, v, t end l = HANGUL_LBASE + sindex / HANGUL_NCOUNT v = HANGUL_VBASE + (sindex % HANGUL_NCOUNT) / HANGUL_TCOUNT t = HANGUL_TBASE + sindex % HANGUL_TCOUNT if t == HANGUL_TBASE t = nil end return l, v, t end
Unicode aware downcase method.
@api private @param [String] input
The input string.
@return [String] The downcased result.
# File lib/addressable/idna/pure.rb, line 129 def self.unicode_downcase(input) input = input.to_s unless input.is_a?(String) unpacked = input.unpack("U*") unpacked.map! { |codepoint| lookup_unicode_lowercase(codepoint) } return unpacked.pack("U*") end
# File lib/addressable/idna/pure.rb, line 219 def self.unicode_sort_canonical(unpacked) unpacked = unpacked.dup i = 1 length = unpacked.length return unpacked if length < 2 while i < length last = unpacked[i-1] ch = unpacked[i] last_cc = lookup_unicode_combining_class(last) cc = lookup_unicode_combining_class(ch) if cc != 0 && last_cc != 0 && last_cc > cc unpacked[i] = last unpacked[i-1] = ch i -= 1 if i > 1 else i += 1 end end return unpacked end