cmap.rb in pdf-reader-1.3.0

- old
+ new

@@ -1,5 +1,7 @@
+# coding: utf-8
+
 ################################################################################
 #
 # Copyright (C) 2008 James Healy (jimmy@deefa.com)
 #
 # Permission is hereby granted, free of charge, to any person obtaining
@@ -22,10 +24,14 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 ################################################################################
 
 class PDF::Reader
+
+  # wraps a string containing a PDF CMap and provides convenience methods for
+  # extracting various useful information.
+  #
   class CMap # :nodoc:
 
     attr_reader :map
 
     def initialize(data)
@@ -82,12 +88,12 @@
       unpacked_string = if str.size == 1 # UTF-8
         str.unpack("C*")
       else # UTF-16
          str.unpack("n*")
       end
-      if unpacked_string.length == 1
+      if unpacked_string.size == 1
         unpacked_string
-      elsif unpacked_string.length == 2 && (unpacked_string[0] > 0xD800 && unpacked_string[0] < 0xDBFF)
+      elsif unpacked_string.size == 2 && unpacked_string[0] > 0xD800 && unpacked_string[0] < 0xDBFF
         # this is a Unicode UTF-16 "Surrogate Pair" see Unicode Spec. Chapter 3.7
         # lets convert to a UTF-32. (the high bit is between 0xD800-0xDBFF, the
         # low bit is between 0xDC00-0xDFFF) for example: U+1D44E (U+D835 U+DC4E)
         [(unpacked_string[0] - 0xD800) * 0x400 + (unpacked_string[1] - 0xDC00) + 0x10000]
       else