Method: PDF::Reader::Buffer#read

Defined in:
lib/pdf/reader/buffer.rb

#read(bytes, opts = {}) ⇒ Object

return raw bytes from the underlying IO stream.

bytes - the number of bytes to read

options:

:skip_eol - if true, the IO stream is advanced past a CRLF, CR or LF
            that is sitting under the io cursor.
Note:
Skipping a bare CR is not spec-compliant.
This is because the data may start with LF.
However we check for CRLF first, so the ambiguity is avoided.



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# File 'lib/pdf/reader/buffer.rb', line 108

def read(bytes, opts = {})
  reset_pos

  if opts[:skip_eol]
    @io.seek(-1, IO::SEEK_CUR)
    str = @io.read(2)
    if str.nil?
      return nil
    elsif str == CRLF # This MUST be done before checking for CR alone
      # do nothing
    elsif str[0, 1] == LF || str[0, 1] == CR # LF or CR alone
      @io.seek(-1, IO::SEEK_CUR)
    else
      @io.seek(-2, IO::SEEK_CUR)
    end
  end

  bytes = @io.read(bytes)
  save_pos
  bytes
end