"keep the entity size within the limitation"

See ruby/ruby@9cdd297

Author: headius

lib/ruby/1.8/rexml/entity.rb

@@ -138,8 +138,14 @@ def value
 				matches = @value.scan(PEREFERENCE_RE)
 				rv = @value.clone
 				if @parent
+					sum = 0
 					matches.each do |entity_reference|
 						entity_value = @parent.entity( entity_reference[0] )
+						if sum + entity_value.bytesize > Document.entity_expansion_text_limit
+							raise "entity expansion has grown too large"
+						else
+							sum += entity_value.bytesize
+						end
 						rv.gsub!( /%#{entity_reference};/um, entity_value )
 					end
 				end

lib/ruby/1.9/rexml/entity.rb

@@ -138,8 +138,14 @@ def value
         matches = @value.scan(PEREFERENCE_RE)
         rv = @value.clone
         if @parent
+          sum = 0
           matches.each do |entity_reference|
             entity_value = @parent.entity( entity_reference[0] )
+            if sum + entity_value.bytesize > Document.entity_expansion_text_limit
+              raise "entity expansion has grown too large"
+            else
+              sum += entity_value.bytesize
+            end
             rv.gsub!( /%#{entity_reference.join};/um, entity_value )
           end
         end

lib/ruby/2.0/rexml/entity.rb

@@ -138,8 +138,14 @@ def value
         matches = @value.scan(PEREFERENCE_RE)
         rv = @value.clone
         if @parent
+          sum = 0
           matches.each do |entity_reference|
             entity_value = @parent.entity( entity_reference[0] )
+            if sum + entity_value.bytesize > Document.entity_expansion_text_limit
+              raise "entity expansion has grown too large"
+            else
+              sum += entity_value.bytesize
+            end
             rv.gsub!( /%#{entity_reference.join};/um, entity_value )
           end
         end