lib/yaml/encoding.rb

   1 #
   2 # Handle Unicode-to-Internal conversion
   3 #
   4
   5 module YAML
   6
   7         #
   8         # Escape the string, condensing common escapes
   9         #
  10         def YAML.escape( value, skip = "" )
  11                 value.gsub( /\\/, "\\\\\\" ).
  12               gsub( /"/, "\\\"" ).
  13               gsub( /([\x00-\x1f])/ ) do
  14                  skip[$&] || ESCAPES[ $&.unpack("C")[0] ]
  15              end
  16         end
  17
  18         #
  19         # Unescape the condenses escapes
  20         #
  21         def YAML.unescape( value )
  22                 value.gsub( /\\(?:([nevfbart\\])|0?x([0-9a-fA-F]{2})|u([0-9a-fA-F]{4}))/ ) {
  23                         if $3
  24                                 ["#$3".hex ].pack('U*')
  25                         elsif $2
  26                                 [$2].pack( "H2" )
  27                         else
  28                                 UNESCAPES[$1]
  29                         end
  30                 }
  31         end
  32
  33 end