* ext/json: Update to JSON 1.1.9.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24727 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 290 deletions

diff --git a/ext/json/lib/json.rb b/ext/json/lib/json.rb
index 35fab1e11d..789b0de546 100755
--- a/ext/json/lib/json.rb
+++ b/ext/json/lib/json.rb
@@ -1,297 +1,10 @@
 require 'json/common'
-# = json - JSON for Ruby
-#
-# == Description
-#
-# This is a implementation of the JSON specification according to RFC 4627
-# (http://www.ietf.org/rfc/rfc4627.txt). Starting from version 1.0.0 on there
-# will be two variants available:
-#
-# * A pure ruby variant, that relies on the iconv and the stringscan
-#   extensions, which are both part of the ruby standard library.
-# * The quite a bit faster C extension variant, which is in parts implemented
-#   in C and comes with its own unicode conversion functions and a parser
-#   generated by the ragel state machine compiler
-#   (http://www.cs.queensu.ca/~thurston/ragel).
-#
-# Both variants of the JSON generator escape all non-ASCII an control
-# characters with \uXXXX escape sequences, and support UTF-16 surrogate pairs
-# in order to be able to generate the whole range of unicode code points. This
-# means that generated JSON text is encoded as UTF-8 (because ASCII is a subset
-# of UTF-8) and at the same time avoids decoding problems for receiving
-# endpoints, that don't expect UTF-8 encoded texts. On the negative side this
-# may lead to a bit longer strings than necessarry.
-#
-# All strings, that are to be encoded as JSON strings, should be UTF-8 byte
-# sequences on the Ruby side. To encode raw binary strings, that aren't UTF-8
-# encoded, please use the to_json_raw_object method of String (which produces
-# an object, that contains a byte array) and decode the result on the receiving
-# endpoint.
-#
-# == Author
-#
-# Florian Frank <mailto:[email protected]>
-#
-# == License
-#
-# This software is distributed under the same license as Ruby itself, see
-# http://www.ruby-lang.org/en/LICENSE.txt.
-#
-# == Download
-#
-# The latest version of this library can be downloaded at
-#
-# * http://rubyforge.org/frs?group_id=953
-#
-# Online Documentation should be located at
-#
-# * http://json.rubyforge.org
-#
-# == Usage
-#
-# To use JSON you can
-#   require 'json'
-# to load the installed variant (either the extension 'json' or the pure
-# variant 'json_pure'). If you have installed the extension variant, you can
-# pick either the extension variant or the pure variant by typing
-#   require 'json/ext'
-# or
-#   require 'json/pure'
-#
-# You can choose to load a set of common additions to ruby core's objects if
-# you
-#   require 'json/add/core'
-#
-# After requiring this you can, e. g., serialise/deserialise Ruby ranges:
-#
-#   JSON JSON(1..10) # => 1..10
-#
-# To find out how to add JSON support to other or your own classes, read the
-# Examples section below.
-#
-# To get the best compatibility to rails' JSON implementation, you can
-#   require 'json/add/rails'
-#
-# Both of the additions attempt to require 'json' (like above) first, if it has
-# not been required yet.
-#
-# == Speed Comparisons
-#
-# I have created some benchmark results (see the benchmarks/data-p4-3Ghz
-# subdir of the package) for the JSON-parser to estimate the speed up in the C
-# extension:
-#
-#  Comparing times (call_time_mean):
-#   1 ParserBenchmarkExt#parser   900 repeats:
-#         553.922304770 (  real) ->   21.500x
-#           0.001805307
-#   2 ParserBenchmarkYAML#parser  1000 repeats:
-#         224.513358139 (  real) ->    8.714x
-#           0.004454078
-#   3 ParserBenchmarkPure#parser  1000 repeats:
-#          26.755020642 (  real) ->    1.038x
-#           0.037376163
-#   4 ParserBenchmarkRails#parser 1000 repeats:
-#          25.763381731 (  real) ->    1.000x
-#           0.038814780
-#             calls/sec (  time) ->    speed  covers
-#             secs/call
-#
-# In the table above 1 is JSON::Ext::Parser, 2 is YAML.load with YAML
-# compatbile JSON document, 3 is is JSON::Pure::Parser, and 4 is
-# ActiveSupport::JSON.decode. The ActiveSupport JSON-decoder converts the
-# input first to YAML and then uses the YAML-parser, the conversion seems to
-# slow it down so much that it is only as fast as the JSON::Pure::Parser!
-#
-# If you look at the benchmark data you can see that this is mostly caused by
-# the frequent high outliers - the median of the Rails-parser runs is still
-# overall smaller than the median of the JSON::Pure::Parser runs:
-#
-#  Comparing times (call_time_median):
-#   1 ParserBenchmarkExt#parser   900 repeats:
-#         800.592479481 (  real) ->   26.936x
-#           0.001249075
-#   2 ParserBenchmarkYAML#parser  1000 repeats:
-#         271.002390644 (  real) ->    9.118x
-#           0.003690004
-#   3 ParserBenchmarkRails#parser 1000 repeats:
-#          30.227910865 (  real) ->    1.017x
-#           0.033082008
-#   4 ParserBenchmarkPure#parser  1000 repeats:
-#          29.722384421 (  real) ->    1.000x
-#           0.033644676
-#             calls/sec (  time) ->    speed  covers
-#             secs/call
-#
-# I have benchmarked the JSON-Generator as well. This generated a few more
-# values, because there are different modes that also influence the achieved
-# speed:
-#
-#  Comparing times (call_time_mean):
-#   1 GeneratorBenchmarkExt#generator_fast    1000 repeats:
-#         547.354332608 (  real) ->   15.090x
-#           0.001826970
-#   2 GeneratorBenchmarkExt#generator_safe    1000 repeats:
-#         443.968212317 (  real) ->   12.240x
-#           0.002252414
-#   3 GeneratorBenchmarkExt#generator_pretty  900 repeats:
-#         375.104545883 (  real) ->   10.341x
-#           0.002665923
-#   4 GeneratorBenchmarkPure#generator_fast   1000 repeats:
-#          49.978706968 (  real) ->    1.378x
-#           0.020008521
-#   5 GeneratorBenchmarkRails#generator       1000 repeats:
-#          38.531868759 (  real) ->    1.062x
-#           0.025952543
-#   6 GeneratorBenchmarkPure#generator_safe   1000 repeats:
-#          36.927649925 (  real) ->    1.018x 7 (>=3859)
-#           0.027079979
-#   7 GeneratorBenchmarkPure#generator_pretty 1000 repeats:
-#          36.272134441 (  real) ->    1.000x 6 (>=3859)
-#           0.027569373
-#             calls/sec (  time) ->    speed  covers
-#             secs/call
-#
-# In the table above 1-3 are JSON::Ext::Generator methods. 4, 6, and 7 are
-# JSON::Pure::Generator methods and 5 is the Rails JSON generator. It is now a
-# bit faster than the generator_safe and generator_pretty methods of the pure
-# variant but slower than the others.
-#
-# To achieve the fastest JSON text output, you can use the fast_generate
-# method. Beware, that this will disable the checking for circular Ruby data
-# structures, which may cause JSON to go into an infinite loop.
-#
-# Here are the median comparisons for completeness' sake:
-#
-#  Comparing times (call_time_median):
-#   1 GeneratorBenchmarkExt#generator_fast    1000 repeats:
-#         708.258020939 (  real) ->   16.547x
-#           0.001411915
-#   2 GeneratorBenchmarkExt#generator_safe    1000 repeats:
-#         569.105020353 (  real) ->   13.296x
-#           0.001757145
-#   3 GeneratorBenchmarkExt#generator_pretty  900 repeats:
-#         482.825371244 (  real) ->   11.280x
-#           0.002071142
-#   4 GeneratorBenchmarkPure#generator_fast   1000 repeats:
-#          62.717626652 (  real) ->    1.465x
-#           0.015944481
-#   5 GeneratorBenchmarkRails#generator       1000 repeats:
-#          43.965681162 (  real) ->    1.027x
-#           0.022745013
-#   6 GeneratorBenchmarkPure#generator_safe   1000 repeats:
-#          43.929073409 (  real) ->    1.026x 7 (>=3859)
-#           0.022763968
-#   7 GeneratorBenchmarkPure#generator_pretty 1000 repeats:
-#          42.802514491 (  real) ->    1.000x 6 (>=3859)
-#           0.023363113
-#             calls/sec (  time) ->    speed  covers
-#             secs/call
-#
-# == Examples
-#
-# To create a JSON text from a ruby data structure, you can call JSON.generate
-# like that:
-#
-#  json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
-#  # => "[1,2,{\"a\":3.141},false,true,null,\"4..10\"]"
-#
-# To create a valid JSON text you have to make sure, that the output is
-# embedded in either a JSON array [] or a JSON object {}. The easiest way to do
-# this, is by putting your values in a Ruby Array or Hash instance.
-#
-# To get back a ruby data structure from a JSON text, you have to call
-# JSON.parse on it:
-#
-#  JSON.parse json
-#  # => [1, 2, {"a"=>3.141}, false, true, nil, "4..10"]
-#
-# Note, that the range from the original data structure is a simple
-# string now. The reason for this is, that JSON doesn't support ranges
-# or arbitrary classes. In this case the json library falls back to call
-# Object#to_json, which is the same as #to_s.to_json.
-#
-# It's possible to add JSON support serialization to arbitrary classes by
-# simply implementing a more specialized version of the #to_json method, that
-# should return a JSON object (a hash converted to JSON with #to_json) like
-# this (don't forget the *a for all the arguments):
-#
-#  class Range
-#    def to_json(*a)
-#      {
-#        'json_class'   => self.class.name, # = 'Range'
-#        'data'         => [ first, last, exclude_end? ]
-#      }.to_json(*a)
-#    end
-#  end
-#
-# The hash key 'json_class' is the class, that will be asked to deserialise the
-# JSON representation later. In this case it's 'Range', but any namespace of
-# the form 'A::B' or '::A::B' will do. All other keys are arbitrary and can be
-# used to store the necessary data to configure the object to be deserialised.
-#
-# If a the key 'json_class' is found in a JSON object, the JSON parser checks
-# if the given class responds to the json_create class method. If so, it is
-# called with the JSON object converted to a Ruby hash. So a range can
-# be deserialised by implementing Range.json_create like this:
-#
-#  class Range
-#    def self.json_create(o)
-#      new(*o['data'])
-#    end
-#  end
-#
-# Now it possible to serialise/deserialise ranges as well:
-#
-#  json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
-#  # => "[1,2,{\"a\":3.141},false,true,null,{\"json_class\":\"Range\",\"data\":[4,10,false]}]"
-#  JSON.parse json
-#  # => [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
-#
-# JSON.generate always creates the shortest possible string representation of a
-# ruby data structure in one line. This good for data storage or network
-# protocols, but not so good for humans to read. Fortunately there's also
-# JSON.pretty_generate (or JSON.pretty_generate) that creates a more
-# readable output:
-#
-#  puts JSON.pretty_generate([1, 2, {"a"=>3.141}, false, true, nil, 4..10])
-#  [
-#    1,
-#    2,
-#    {
-#      "a": 3.141
-#    },
-#    false,
-#    true,
-#    null,
-#    {
-#      "json_class": "Range",
-#      "data": [
-#        4,
-#        10,
-#        false
-#      ]
-#    }
-#  ]
-#
-# There are also the methods Kernel#j for generate, and Kernel#jj for
-# pretty_generate output to the console, that work analogous to Core Ruby's p
-# and the pp library's pp methods.
-#
-# The script tools/server.rb contains a small example if you want to test, how
-# receiving a JSON object from a webrick server in your browser with the
-# javasript prototype library (http://www.prototypejs.org) works.
-#
 module JSON
   require 'json/version'
 
-  if VARIANT_BINARY
+  begin
     require 'json/ext'
-  else
-    begin
-      require 'json/ext'
-    rescue LoadError
-      require 'json/pure'
-    end
+  rescue LoadError
+    require 'json/pure'
   end
 end