isjis(str)
private
Returns whether input encoding is ISO-2022-JP or not.
# File ext/nkf/lib/kconv.rb, line 173
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/ox =~ str.dup.force_encoding('BINARY') ? true : false
end
