RUBY_ENCODING_MASK 37 include/ruby/encoding.h #define ENCODING_MASK RUBY_ENCODING_MASK RUBY_ENCODING_MASK 40 include/ruby/encoding.h RBASIC(obj)->flags &= ~RUBY_ENCODING_MASK;\ RUBY_ENCODING_MASK 46 include/ruby/encoding.h (int)((RBASIC(obj)->flags & RUBY_ENCODING_MASK)>>RUBY_ENCODING_SHIFT)