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 282 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 290 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 305 def self.lookup_unicode_composition(unpacked) return COMPOSITION_TABLE[unpacked] end
# File lib/addressable/idna/pure.rb, line 297 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 660 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 628 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 646 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 633 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 638 def self.punycode_encode_digit(d) d + 22 + 75 * ((d < 26) ? 1 : 0) end
# File lib/addressable/idna/pure.rb, line 188 def self.ucs4_to_utf8(char, buffer) if char < 128 buffer << char elsif char < 2048 buffer << (char >> 6 | 192) buffer << (char & 63 | 128) elsif char < 0x10000 buffer << (char >> 12 | 224) buffer << (char >> 6 & 63 | 128) buffer << (char & 63 | 128) elsif char < 0x200000 buffer << (char >> 18 | 240) buffer << (char >> 12 & 63 | 128) buffer << (char >> 6 & 63 | 128) buffer << (char & 63 | 128) elsif char < 0x4000000 buffer << (char >> 24 | 248) buffer << (char >> 18 & 63 | 128) buffer << (char >> 12 & 63 | 128) buffer << (char >> 6 & 63 | 128) buffer << (char & 63 | 128) elsif char < 0x80000000 buffer << (char >> 30 | 252) buffer << (char >> 24 & 63 | 128) buffer << (char >> 18 & 63 | 128) buffer << (char >> 12 & 63 | 128) buffer << (char >> 6 & 63 | 128) buffer << (char & 63 | 128) end 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(ch_one, p) ucs4_to_utf8(ch_two, p) return lookup_unicode_composition(p) end
# File lib/addressable/idna/pure.rb, line 244 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 265 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 220 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