module RDoc::Encoding
This class is a wrapper around File IO and Encoding that helps RDoc load files and convert them to the correct encoding.
Public Class Methods
read_file(filename, encoding, force_transcode = false)
click to toggle source
Reads the contents of filename
and handles any encoding
directives in the file.
The content will be converted to the encoding
. If the file
cannot be converted a warning will be printed and nil will be returned.
If force_transcode
is true the document will be transcoded and
any unknown character in the target encoding will be replaced with
'?'
# File lib/rdoc/encoding.rb, line 18 def self.read_file filename, encoding, force_transcode = false content = open filename, "rb" do |f| f.read end content.gsub!("\r\n", "\n") if RUBY_PLATFORM =~ /mswin|mingw/ utf8 = content.sub!(/\A\xef\xbb\xbf/, '') RDoc::Encoding.set_encoding content if Object.const_defined? :Encoding then begin encoding ||= Encoding.default_external orig_encoding = content.encoding if utf8 then content.force_encoding Encoding::UTF_8 content.encode! encoding else # assume the content is in our output encoding content.force_encoding encoding end unless content.valid_encoding? then # revert and try to transcode content.force_encoding orig_encoding content.encode! encoding end unless content.valid_encoding? then warn "unable to convert #{filename} to #{encoding}, skipping" content = nil end rescue Encoding::InvalidByteSequenceError, Encoding::UndefinedConversionError => e if force_transcode then content.force_encoding orig_encoding content.encode!(encoding, :invalid => :replace, :undef => :replace, :replace => '?') return content else warn "unable to convert #{e.message} for #{filename}, skipping" return nil end end end content rescue ArgumentError => e raise unless e.message =~ /unknown encoding name - (.*)/ warn "unknown encoding name \"#{$1}\" for #{filename}, skipping" nil rescue Errno::EISDIR, Errno::ENOENT nil end
set_encoding(string)
click to toggle source
Sets the encoding of string
based on the magic comment
# File lib/rdoc/encoding.rb, line 76 def self.set_encoding string string =~ /\A(?:#!.*\n)?(.*\n)/ first_line = $1 name = case first_line when /^<\?xml[^?]*encoding=(["'])(.*?)\1/ then $2 when /\b(?:en)?coding[=:]\s*([^\s;]+)/i then $1 else return end string.sub! first_line, '' return unless Object.const_defined? :Encoding enc = Encoding.find name string.force_encoding enc if enc end