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Showing content from https://docs.ruby-lang.org/en/3.0/Kconv.html below:

module Kconv - RDoc Documentation

module Kconv

Kanji Converter for Ruby.

Constants

ASCII: ASCII
AUTO: Auto-Detect
BINARY: BINARY
EUC: EUC-JP
JIS: ISO-2022-JP
NOCONV: NOCONV
SJIS: Shift_JIS
UNKNOWN: UNKNOWN
UTF16: UTF-16
UTF32: UTF-32
UTF8: UTF-8

Public Class Methods

guess(str) → encoding click to toggle source

Guess input encoding by NKF.guess

def guess(str)
  ::NKF::guess(str)
end

iseuc(str) → true or false click to toggle source

Returns whether input encoding is EUC-JP or not.

Note don't expect this return value is MatchData.

def iseuc(str)
  str.dup.force_encoding(EUC).valid_encoding?
end

isjis(str) → true or false click to toggle source

Returns whether input encoding is ISO-2022-JP or not.

def isjis(str)
  /\A [\t\n\r\x20-\x7E]*
    (?:
      (?:\x1b \x28 I      [\x21-\x7E]*
        |\x1b \x28 J      [\x21-\x7E]*
        |\x1b \x24 @      (?:[\x21-\x7E]{2})*
        |\x1b \x24 B      (?:[\x21-\x7E]{2})*
        |\x1b \x24 \x28 D (?:[\x21-\x7E]{2})*
      )*
      \x1b \x28 B [\t\n\r\x20-\x7E]*
    )*
   \z/nox =~ str.dup.force_encoding('BINARY') ? true : false
end

issjis(str) → true or false click to toggle source

Returns whether input encoding is Shift_JIS or not.

def issjis(str)
  str.dup.force_encoding(SJIS).valid_encoding?
end

isutf8(str) → true or false click to toggle source

Returns whether input encoding is UTF-8 or not.

def isutf8(str)
  str.dup.force_encoding(UTF8).valid_encoding?
end

kconv(str, to_enc, from_enc=nil) click to toggle source

Convert str to to_enc. to_enc and from_enc are given as constants of Kconv or Encoding objects.

def kconv(str, to_enc, from_enc=nil)
  opt = ''
  opt += ' --ic=' + from_enc.to_s if from_enc
  opt += ' --oc=' + to_enc.to_s if to_enc

  ::NKF::nkf(opt, str)
end

toeuc(str) → string click to toggle source

Convert str to EUC-JP

def toeuc(str)
  kconv(str, EUC)
end

tojis(str) → string click to toggle source

Convert str to ISO-2022-JP

def tojis(str)
  kconv(str, JIS)
end

tolocale → string click to toggle source

Convert self to locale encoding

def tolocale(str)
  kconv(str, Encoding.locale_charmap)
end

tosjis(str) → string click to toggle source

Convert str to Shift_JIS

def tosjis(str)
  kconv(str, SJIS)
end

toutf16(str) → string click to toggle source

Convert str to UTF-16

def toutf16(str)
  kconv(str, UTF16)
end

toutf32(str) → string click to toggle source

Convert str to UTF-32

def toutf32(str)
  kconv(str, UTF32)
end

toutf8(str) → string click to toggle source

Convert str to UTF-8

def toutf8(str)
  kconv(str, UTF8)
end

Private Instance Methods