method
new
v1_9_1_378 -
Show latest stable
- Class:
REXML::IOSource
new(arg, block_size=500, encoding=nil)public
block_size has been deprecated
# File lib/rexml/source.rb, line 138
def initialize(arg, block_size=500, encoding=nil)
@er_source = @source = arg
@to_utf = false
# Determining the encoding is a deceptively difficult issue to resolve.
# First, we check the first two bytes for UTF-16. Then we
# assume that the encoding is at least ASCII enough for the '>', and
# we read until we get one of those. This gives us the XML declaration,
# if there is one. If there isn't one, the file MUST be UTF-8, as per
# the XML spec. If there is one, we can determine the encoding from
# it.
@buffer = ""
str = @source.read( 2 ) || ''
if encoding
self.encoding = encoding
elsif str[0,2] == "\xfe\xff"
@line_break = "\0000>"
elsif str[0,2] == "\xff\xfe"
@line_break = ">\0000"
elsif str[0,2] == "\xef\xbb"
str += @source.read(1)
str = '' if (str[2,1] == "\xBF")
@line_break = ">"
else
@line_break = ">"
end
super( @source.eof? ? str : [email protected]( @line_break ) )
end