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 36 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 48 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 32 def self.unicode_normalize_kc(value) IDN::Stringprep.nfkc_normalize(value.to_s) end
Private Class Methods
# File lib/addressable/idna/pure.rb, line 280 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 288 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 303 def self.lookup_unicode_composition(unpacked) return COMPOSITION_TABLE[unpacked] end
# File lib/addressable/idna/pure.rb, line 295 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 658 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 626 def self.punycode_basic?(codepoint) codepoint < 0x80 end
# File lib/addressable/idna/native.rb, line 28 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 644 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 631 def self.punycode_delimiter?(codepoint) codepoint == PUNYCODE_DELIMITER end
# File lib/addressable/idna/native.rb, line 24 def self.punycode_encode(value) IDN::Punycode.encode(value.to_s) end
# File lib/addressable/idna/pure.rb, line 636 def self.punycode_encode_digit(d) d + 22 + 75 * ((d < 26) ? 1 : 0) end
# File lib/addressable/idna/pure.rb, line 139 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] if (starter_cc == 0 && (composite = unicode_compose_pair(starter, ch)) != nil) starter = composite else unpacked_result << starter starter = ch end end unpacked_result << starter return unpacked_result end
# File lib/addressable/idna/pure.rb, line 164 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 242 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 263 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 131 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 218 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