Revision history for Perl extension Cpanel::JSON::XS

TODO: http://stevehanov.ca/blog/index.php?id=104 compression

4.39 2024-12-12 (rurban)
        - Fix Windows -Dusequadmath (sisyphus GH #235, GH #229)
        - Fix inconsistent behavior between decoding escaped and unescaped
          surrogates, and escaped non-characters vs non-escaped non-characters.
          Now aligned to JSON::PP (Gavin Hayes GH #233, GH #227)
        - Add type_all_string tests (Bernhard Schmalhofer GH #236)
        - Silence UV to char cast warnings  (bulk88 GH #232)
        - Fix MSVC preprocessor errors (bulk88 GH #232)
        - Fix -Wformat warnings on Windows (sisyphus GH #228)
        - Clarify BigInt decoding (GH #226)

4.38 2024-05-27 (rurban)
        - Encode real core booleans as boolean notation (PR #224 leonerd)
        - Minor test fixes by leonerd
        - Fix docs typo (PR #225 karenetheridge)

4.37 2023-07-04 (rurban)
        - Fix NAN/INF for AIX (Tux: AIX-5.3, tested by XSven on AIX-7.3) GH #165
        - Fix empty string result in object stringification (PR #221 jixam)
        - Allow \' in strings when allow_singlequote is enabled (PR #217 warpspin)

4.36 2023-03-02 (rurban)
        - remove the SAVESTACK_POS noop. Merged from JSON-XS-3.02,
          removed there with 4.0. requested to remove with
          L<https://github.com/Perl/perl5/pull/20858>

4.35 2023-02-22 (rurban)
        - fix utf8 object stringification (jixam PR #212)

4.34 2023-02-21 (rurban)
        - fix c89 compilation regression, for loop init on centos. GH #211

4.33 2023-02-21 (rurban)
        - fix a security issue, decoding hash keys without ending :
          (GH #208)
        - check all bare hash keys for utf8 (GH #209)
        - improve overload warnings (Graham Knop PR #205)
        - fix a croak leak (GH #206)

4.32 2022-08-13 (rurban)
        - fix new JSON::PP::Boolean overload redefinition warnings. GH #200

4.31 2022-08-10 (rurban)
        - adjust t/20_unknown.t pp bool tests for native bool when supported.
          GH #198 PR by Graham Knop.

4.30 2022-06-14 (rurban)
        - Fix perl 5.37 utf8n_to_uvuni deprecation. GH #196

4.29 2022-05-27 (rurban)
        - Hack: Revert native bool (unblessed) overloads via JSON::PP 4.08.
          JSON::PP ignores unblessed bools for now. GH #194

4.28 2022-05-05 (rurban)
        - Validate the JSON struct which might get corrupted by wrong FREEZE/THAW
          methods, or other serializers, or corrupting our magic object. (GH #192)
        - Improve our DESTROY and END methods to avoid NULL dereferences.
          Fixes perl-compiler/#438
        - Fix 3 tests in t/20_unknown.t with the latest 5.35.10 bool enhancements
          and JSON::PP (GH #194)
        - Fix t/118_type.t with Windows ivtype long long. (GH #178)
        - Added github actions

4.27 2021-10-13 (rurban)
        - Only add -Werror=declaration-after-statement for 5.035004 and earlier (PR #186 nwc)
	- Fix 125_shared_boolean.t for threads (PR #184 Sinan Unur)

4.26 2021-04-12 (rurban)
        - Fix compilation with C++ (GH #177)

4.25 2020-10-28 (rurban)
        - Fix decode relaxed with comment at the end of the buffer (GH #174 fgaspar), a regression
          introduced with 3.0220, to fix n_number_then_00.
        - Possible fix for a gcc-9 optimizer bug (GH #172)

4.24 2020-10-02 (rurban)
        - Fix decode_json(scalar, 0) (GH #171 plicease), check 2nd arg for true-ness

4.23 2020-09-05 (rurban)
        - Fixup t/54_stringify change for JSON 2.09 (really use PR #169 madsen)

4.22 2020-09-04 (rurban)
        - Fix t/54_stringify needs JSON 2.09 for allow_unknown (PR #169 madsen)
        - Fix t/118_type.t for 5.6
        - Fix t/96_interop.t for missing JSON::XS (GH #83 ribasushi)
        - Possible fix for s390x with long double, untested (GH #83)

4.21 2020-08-13 (rurban)
        - Fix not enough HEK memory allocation for the new canonical tied hashes
          feature. (GH #168)
        - TODO broken JSON::PP::Boolean versions 2.9x - 4.0 with threads::shared in
          125_shared_boolean.t

4.20 2020-08-12 (rurban)
        - New feature: sort tied hashes with canonical. (GH #167)
        - Fix encode of threads::shared boolean (#166 Sam Bingner).
          This was broken with 4.00.
        - Fix some stringify overload cases via convert_blessed (GH #105)
        - Fix a compat case with JSON::XS, when convert_blessed is set, but
          allow_blessed not. (GH #105)
        - Improve blessed and stringify tests
        - Work on better inf/nan detection on AIX (#165 Peter Heuchert)
        - Fix documentation for booleans and their types (#162 by Karen Etheridge)

4.19 2020-02-06 (rurban)
        - Fix typed decode memory leak (#160 by Pali).

4.18 2019-12-13 (rurban)
        - Add new method ->type_all_string (#156 by Pali).
          When type_all_string is set then encode method produce stable deterministic
          string types in result JSON.
          This can be an alternative to Cpanel::JSON::XS::Type when having
          deterministic output is required but string JSON types are enough for any
          output.
        - Move SvGETMAGIC() from encode_av() and encode_hv() to encode_sv()
          (#156 by Pali)
        - Add Math::BigInt and Math::BigFloat as recommended dependences
          (#157 by Pali and Grinnz)

4.17 2019-11-04 (rurban)
        - Add Changes tests and fixups (see #155)

4.16 2019-11-04 (rurban)
        - Use Perl_strtod instead of self-made atof (via pow), to
          minimize differences from core string-to-float conversions.
          (#154). Fixes float representation regressions (in the 1e-6
          to 1e-16 range) since 5.22.

4.15 2019-10-21 (rurban)
        - Fix more tests for nvtype long double

4.14 2019-10-15 (rurban)
        - Fix tests for nvtype long double (#153)
        - Fix PREREQ's. E.g. CentOS 7 has not Test::More anymore. (#152 by Pali)

4.13 2019-10-14 (rurban)
        - For JSON_TYPE_INT and JSON_TYPE_FLOAT allow to encode numeric values
          above 2^64 in PV slot via Math::BigInt/Float (#145, #148, #149 by Pali)
        - For JSON_TYPE_INT and JSON_TYPE_FLOAT encoder allow to pass Math::BigInt
          and Math::BigFloat objects with allow_bignum. (#147 by Pali)
        - Fix encoding floating point values above 2^64 in PV slot to JSON_TYPE_INT
          (#148, #150 by Pali)
        - Do not allow serializing objects when convert_blessed is not enabled.
          (#146 by Pali)

4.12 2019-06-11 (rurban)
        - Make encoder independent on Math::BigInt version (#140 by Pali)
        - Rethrow error from eval_sv and eval_pv() (#138, #139 by Pali),
          e.g. when Math::BigInt/BigFloat fails.
        - Fix encoding Inf and NaN from PV and NV slots to JSON_TYPE_INT
          (#137 by Pali)
        - Fix memory corruption in sv_to_ivuv() function (#136 by Pali)
        - Add new method ->require_types (#135 by Pali)
        - Fix typed json encoder conversion from scalar's PV and NV slot to
          JSON_TYPE_INT (#133, #134 by Pali)
        - Fix inconsistency with warnings in typed json encoder (#131 by Pali)
        - Fix Perl 5.8.0 support (#130 by Pali)
        - Fixed minor pod typo (#129 by sheeit)
        - Document invalid recursive callbacks or overloads (#128)

4.11 2019-03-26 (rurban)
        - Fix unicode strings with BOM corrupt ->utf8 state (#125)
          The BOM encoding effects only its very own decode call,
          not its object.

4.10 2019-03-18 (rurban)
        - Fix incr_text refcounts (#123)
        - Add incr_rest testcase (#123)
        - Fix encode_stringify string-overload refcnt problem (#124)
          "Attempt to free unreferenced scalar" with convert_blessed and overload.

4.09 2019-02-15 (rurban)
        - Add seperate allow_dupkeys property, in relaxed (#122)
        - Fixed allow_dupkeys for the XS slow path
        - Silence 2 -Wunused-value warnings
        - Fix ->unblessed_bool to produce modifiable perl structures (PR #121 by Pali)

4.08 2018-11-28 (rurban)
        - Add unblessed_bool property (PR #118 by Pali)

4.07 2018-11-02 (rurban)
        - Silence Gconvert -Wunused-result.
          gcvt returns a string, sprintf int, so suppress the retval

4.06 2018-08-22 (rurban)
        - Fix overloaded eq/ne comparisons (GH #116 by demerphq, GH #117 by Graham Knopp):
          detect strings, protect from endless recursion. false is now ne "True".
          clarify eq/ne rules in the docs.

4.05 2018-08-19 (rurban)
        - Set decoded type (PR #115 by Pali)
        - Add json_type_weaken (PR #114 by Pali)
        - Fix tests for 5.6 (rurban, pali)

4.04 2018-06-22 (rurban)
        - Fix bignum NaN/inf handling (#78 reported by Slaven Rezic)
        - Move author tests to xt/ as suggested in #106, added a make xtest target.
          Fixes a test fail with ASAN.

4.03 2018-06-21 (rurban)
        - Add sereal cpanel_json_xs type (#110 James Rouzier)
        - Fix bencode/bdecode methods in cpanel_json_xs (#111 Fulvio Scapin)
        - Overload ne operator for JSON::PP::Boolean (#107 tevfik1903)
        - Add a missing semicolon to a documentation example (#104 E. Choroba)

4.02 2018-02-27 (rurban)
        - Add encoder indent_length method (#103 rouzier), previously
          hard-coded to 3.

4.01 2018-02-03 (rurban)
        - Fix centos7 locale crash (#101 McA), fix required for all
          threaded perl's < 5.22 with glibc.

4.00 2018-02-02 (rurban,pali)
        - No changes

3.99_03 2018-01-30 (rurban,pali)
        - Fix uselocale() code.
        - Probe for uselocale and xlocale.h with <5.22 threaded.

3.99_02 2018-01-30 (rurban,pali)
        - Avoid setlocale race in threads with non-C locales, where the threads differ
          in the LC_NUMERIC locale. (#99 pali)

3.99_01 2018-01-30 (rurban,pali)
        - Added Cpanel::JSON::XS::Type as 2nd optional encode argument. (#94 pali)
        - Removed calling get magic hooks twice in encode.

3.0240 2017-12-17 (rurban)
        - Simplify >allow_singlequote check, coverity cid #165321
        - Deprecate UTF-16 or UTF-32 BOM's: RFC 8259.

3.0239 2017-08-28 (rurban)
        - Fix compilation under windows. (#98 mauke)

3.0238 2017-08-25 (rurban)
        - Make printing of numbers on perl's earlier than 5.22 locale
        insensitive, to produce a dot as decimal sep. (#96)

3.0237 2017-07-28 (rurban)
        - relax inf/nan tests as in t/op/infnan.t for windows.
          we cannot know if msvcrt.dll or the new ucrt.dll is used.
          try a list of valid values.

3.0236 2017-07-27 (rurban)
        - Stringify true again as "1", not as "true" due to popular demand.
          (haarg #87)

3.0235 2017-07-27 (rurban)
        - Disallow duplicate keys by default, only allow them in relaxed
          mode. (#75)
          Analog to invalid unicode, which does error by default.
          RFC 7159 section 4 says that "The names within an object should be unique."
          So it's either i_ (undefined) or n_ (errors).
          See http://seriot.ch/parsing_json.php#24
          This is different to the other JSON modules, which do have a different
          interpretation of the spec. Use relaxed for backcompat if you want to
          allow duplicate keys.
        - De-fragilize t/96_mojo.t false test to "". It mostly is.

3.0234 2017-07-27 (rurban)
        - Fix and unify utf8 handling with 5.6.2
          and improve many utf8 tests. (pali #88)
        - Add tests for boolean sv_yes and sv_no (pali #88)
        - Check for correct module in %INC (Patrick Cronin #89)
        - Fix appveyor smoke with latest strawberry, use $Config{make} (pali #91)
        - Fix inf/nan for strawberry 5.26

3.0233 2017-05-01 (rurban)
        - 5.6 test fixes, silence some cc warnings,
          add coverage and release targets, fix appveyor

3.0232 2017-04-30 (rurban)
        - Fix for MSVC 2015/14.0 and newer with changed nan/inf. #85
        - Added appveyor CI
        - Silence 32bit debugging format warning
        - stabilize decode_hv hook (Coverity)
        - ignore sv_utf8_downgrade errors (Coverity)

3.0231 2017-03-29 (rurban)
        - Fix need() overallocation (#84 Matthew Horsfall) and missing
        need() calls.

3.0230 2017-03-12 (rurban)
        - Relax -Werror=declaration-after-statement for older gcc < 4.2

3.0229 2017-03-10 (rurban)
        - fix minor gcc compilation warnings.
        - Add some core compat. warnings for gcc/clang compat. compilers.

3.0228 2017-03-08 (rurban)
        - fix decode_prefix offset when the string was re-allocated.
        rather return the offset not the pointer to the old start. (#82 PaulGWebster)

3.0227 2017-02-13 (rurban)
        - fix CLONE and END, broken with 3.0226 (#80 y).
          These methods are usually called with arguments, which we ignore.

3.0226 2017-02-11 (rurban)
        - relax longdouble Gconvert test on ppc64le and aarch64-linux-ld,
        with apparent HW quadmath without USE_QUADMATH (older perls).
        (detected by dgolden)
        - Fixed 2 uninit warnings in the XS

3.0225 2016-11-23 (rurban)
        - decode utf8 security fixes for perl 5.6.
          added extra detection code for overflows and non-continuations.
          This broke one 5.6 test with an overlong multi-byte character,
          which previously worked accidently.
          i.e. decode "\ud801\udc02\x{10204}"
        - Added tests for ill-formed utf8 sequences from Encode.

3.0224 2016-11-20 (rurban)
        - fixes for g++-6, stricter -fpermissive and -Wc++11-compat

3.0223 2016-11-16 (rurban)
        - fixed decode bignum with a string prefix. #76, patch by GilmarSantosJr.

3.0222 2016-10-30 (rurban)
        - enable decode_bom for multibyte encodings UTF16 and UTF32.
          encode internally to UTF-8.

3.0221 2016-10-30 (rurban)
        - fixed documentation of decode for unicode noncharacters.
          added correct code to warn as in core.
          no replacement, ignore warnings when in relaxed mode.
          We used a wrong range also, but the wrong code from 3.02220
          was never executed because of an coding error. #73, #74
        - Fixed a perl 5.6 compilation regression from 3.0220.
        - Improve decode_bom for multibyte encoding, but not yet enabled.
          refcount error.
        - Add 5.24 to travis tests

3.0220 2016-10-28 (rurban)
	- add comprehensive JSON decode spectests from
          http://seriot.ch/parsing_json.html. #72
        - decode with BOM (UTF-8, UTF-16, or UTF-32). For now only UTF-8,
          the others error.
        - fixed detection of final \0 as illegal non-whitespace garbage. Fixes
          spectest 'n_number_then_00'. #72
        - changed decode of unicode noncharacters between U+FFFD and U+10FFFF
          to the recommended U+FFFD REPLACEMENT CHARACTER, when not in the binary
          or relaxed mode.
        - fail decode of non-unicode raw characters above U+10FFFF
          when not in relaxed mode.

3.0219 2016-10-26 (rurban)
	- workaround mingw 4.0 modfl() bug [perl #125924]

3.0218 2016-10-13 (rurban)
	- no changes

3.0217_06 2016-10-08 (rurban)
	- fix DPPP_dummy_PL_parser warnings

3.0217_05 2016-10-07 (rurban)
	- fix t/gh70-asan.t for older perls < 5.14

3.0217_04 2016-10-07 (rurban)
	- fix and document wrong strEQc usage in new(). #70 (ilmari)

3.0217_03 2016-10-06 (rurban)
	- expect_false() macro fix for MSVC
        - fix av and hv length types: protect from security sensitive overflows,
          add HVMAX_T and RITER_T
        - add new "Hash key too large" error. perl5 silently truncates it, we
          prefer errors, cperl 5.25.1 does error also.
        - fix broken 5.8.1 SvPOK_only, i.e. assert_not_ROK

3.0217_02 2016-10-04 (rurban)
	- Use faster strEQc macros from cperl with constant strings.
        - prefer memEQ for systems without memcmp, to use bcmp there.
        - add more expect_false() to inf/nan branches.

3.0217_01 2016-10-04 (rurban)
	- Detect INF/NAN: ?/++/-?/--- on HP-UX (#56)
        - New stringify_infnan(3) infnan_mode. Easy to detect platform
          independent "inf", "-inf" or "nan" strings with double quotes,
          with qnan, snan or negative nan unified to "nan".

3.0217 2016-06-18 (rurban)
	- Improve test t/20_unknown.t for older JSON::PP (Christopher J. Madsen)

3.0216 2016-06-12 (rurban)
	- Fix wrong test 117 for 5.10.0 (pghmcfc)

3.0215 2016-06-03 (rurban)
	- Fix wrong test 117 (pghmcfc)
        - TODO the fragile mojo boolean interop test.
	- Improve error message with class based method calls,
          when forgetting ->new. #66

3.0214 2016-06-02 (rurban)
	- Fix a off-by-one IV_MIN -> NV overflow in decode_json. #67 (xdg)
        - Avoid encode_sv SEGV with -Dusequadmath #62
          Fix quadmath NV stringification.

3.0213_02 2016-04-13 (rurban)
	- Remove author-only Pod::Usage dependency (karenetheridge).

3.0213_01 2016-04-11 (rurban)
	- Preserve numbers as numbers, enforce an added .0 (dagolden).
          Also note that 42+"bar" will result >=5.10 in numbers not integers,
          => 42.0
        - 5.6 compilation fixes
        - add yaml-tiny formats to cpanel_json_xs

3.0213 2016-03-02 (rurban)
	- silence JSON::PP::Boolean redefine warnings #60

3.0212 2016-02-27 (rurban)
	- merge with JSON-XS-3.02:
	  - docs: add some INTEROP, stricter nonref RFC 7159 and
	          TAGGED VALUE SYNTAX AND STANDARD JSON EN/DECODERS paragraphs
	  - use 7159 nonref detection from JSON-XS: json_nonref()
	  - add some SAVESTACK_POS calls
	  - add -f cbor decode option (via CBOR::XS) to cpanel_json_xs
	- fixed many spelling errors in the new docs
	- fixed errors with threaded perls
	- improved code quality in new merged code and fixed
          new warnings found with gcc-5

	- add -f and -t yaml-xs and yaml-syck options to cpanel_json_xs

3.0211 2016-01-10 (rurban)
       - relax Mojo interop test strictness ('' or 0 for false)
       - t/z_pod.t as author test (Ether)
       - t/z_kwalitee.t accepts now RELEASE_TESTING
       - fix mingw64 inf/nan with uselongdouble, strawberry 5.22.1. #57

3.0210 2015-12-03 (rurban)
       - improve cpanel_json_xs: more input and output formats
       - improved various spellings and add test
       - much faster t/99_binary.t test

3.0209 2015-12-03 (rurban)
       - Fix nasty regression bug with allow_singlequote or relaxed,
         hanging with single quotes in normal strings. #54
         (reported by Quim Rovira)

3.0208 2015-12-02 (rurban)
       - Fix regression for is_bool([]), with unblessed references. #53
         (reported by Gregory Oschwald)

3.0207 2015-12-02 (rurban)
       - Fix regression decoding big strings (>16384). #50 (reported by Dan Book)
       - Ignore allow_barekey if we detect quotes. #51 (Fixed by Quim Rovira)
       - Skip some unicode tests with 5.6

3.0206 2015-11-30 (rurban)
       - Add support for escape_slash from JSON::PP. #47
       - Map sort_by to canonical from JSON::PP. #47
         reverse sort or sort by custom keys not yet possible/silently ignored.
       - Add support for allow_singlequote from JSON::PP. #47
       - Add support for allow_barekey from JSON::PP. #47
       - Add support for allow_bignum from JSON::PP. #47
       - relaxed uses now also allow_singlequote and allow_barekey.
       - Fixed t/20_unknown.t: SKIP when JSON is not available. #45
       - Fixed t/55_modifiable.t: Broaden the is check of true <5.12 #45
         (both reported by Paul Howarth)
       - Add t/zero-mojibake.t from JSON::PP testing all supported decoding
         options: none, utf8, ascii, latin1, binary.

3.0205 2015-11-29 (rurban)
       - Add t/20_unknown.t tests from JSON::PP, extended.
       - Fix convert_blessed, disallow invalid JSON. #46 (reported by Dan Book)
         convert_blessed returns now always a string, even for numbers.
       - Fix encountered GLOB error message (still in JSON::XS, and JSON::PP took
         over the wrong message also).
       - Fixed regression of immediate raw values for null/true/false to be
         modifiable again. #45. Broken with 3.0201 - 3.0204.
         (reported by Thomas Sibley and Karen Etheridge)
         This caused failues in Test::JSON and App::RecordStream.

3.0204 2015-11-26 (rurban)
       - Fix is_bool with JSON::XS >3.0 interop. #44 (Graham Knop)

3.0203 2015-11-26 (rurban)
       - New optional decode_json() argument to set allow_nonref as in
         RFC 7159 and PHP. Before 3.02 JSON::XS and Cpanel::JSON::XS always
         allowed nonref values for decode_json due to an interal bug.

3.0202 2015-11-26 (rurban)
       - New feature: convert_blessed for encode.
         Stringify overloaded perl objects and with allow_blessed even without
         string overload (#37)

3.0201 2015-11-26 (rurban)
       - Simplify handling of references, removing all the complicated
         work-around for reblessing. Breaks overloaded values, but fixes
         serialising refs to readonly values. #21 (Gianni Ceccarelli)
         new test t/53_readonly.t
         schmorp thinks that overloading is broken with this patch,
         but reblessing and breaking readonly is worse.
       - Stabilize Test::Kwalitee with missing XS dependencies
       - suggests common::sense, not recommend. #36 (mst)
       - Boolean interop: use only JSON::PP::Boolean. #40
         Remove our own JSON::XS::Boolean, and solely use
         JSON::PP::Boolean and accept Mojo::JSON::_Bool and
         Types::Serialiser::Boolean, which is aliased to JSON::PP::Boolean.
         JSON::YAJL::Parser just produces an unbless IV (0|1).
         fix overload of our bools.
         stringify true to "true", false to "0"
       - accept Mojo::JSON::_Bool (#37)
         Mojo does not store their booleans as JSON::PP::Boolean
         as everybody else does.
       - accept is_bool as method call also.
       - implement native encode_sv of the internal sv_yes/sv_no values (#39)
         and map them to json true/false. YAML::XS compatible.
       - pod: add SECURITY CONSIDERATIONS
         added a table of safe and unsafe serializers for comparison.
         Written by JD Lightsey.
         Only JSON and Data::MessagePack are safe by default.
       - With canonical only skip hash keys sorting for actually tied hashes.
         #42 (Sergey Aleynikov)

3.0115 2015-01-31 (rurban)
       - Fix stack corruption when encoding nested objects with FREEZE method,
         #35 (Sergey Aleynikov)

3.0114 2015-01-04 (rurban)
       - Fix bad powl with Freebsd 10 -Duselongdouble. Rather use strtold. #34 + RT #101265

3.0113 2014-12-15 (rurban)
       - t/117_number relax the tests for negative nan, as BSDs also cannot deal with it. #33

3.0112 2014-12-14 (rurban)
       - Add {get_,}stringify_infnan methods and use it in the test, now run-time. #32
         mode 0: null, 1: stringify, 2: inf/nan (invalid JSON) as before.
       - Fix t/117_number tests for Solaris and MSWin32
       - Remove build-time "Do you want to handle inf/nan as strings? Default: null." prompt.
       - Improve docs.

3.0111 2014-12-13 (rurban)
       - Fixed detecting 1.#INF/1.#IND on windows. #28
       - Also detect now -inf and -nan. #28
       - Fixed STRINGIFY_INFNAN return string, length off by one. #28
       - Fixed a non-C99 declaration error on XS.xs:863. Was broken with older MSVC.

3.0110 2014-12-12 (rurban)
       - Fixed one more memory bug with encode of dual-vars to strings,
         esp. with older perl <5.10, leading to eventual panic: realloc.

3.0109 2014-12-12 (rurban)
       - Fixed serious bug with encode of dual-vars to strings, missing
         the ending \0. #31 (Grinnz)

3.0108 2014-12-11 (rurban)
       - Change encode of numbers with dual-strings (int and float), integers
         and numbers are now not mishandled anymore by dual-vars, temp. string representations.
         Add t/117_numbers.t from JSON::PP, PR#10 by kraih.
       - Add prompt for nan/inf encode policy: null or stringify.
       - Change stringification of false and true to 0 and 1, matching upstream JSON and JSON::XS, #29.
         This didn't affect string comparisons, just e.g. print decode_json("false").
       - Tolerate literal ASCII TABs in strings in relaxed mode #22 (from JSON::XS)
       - Revise pod, merge updates from JSON::XS.
       - Fix pod typo #30 (Colin Kuskie)

3.0107 2014-11-28 (rurban)
       - fix fatal stack corruption with perl callbacks in list context
         #27 (dur-randir)

3.0106 2014-11-11 (rurban)
       - more minor doc improvements #26 (schwern)

3.0105 2014-11-05 (rurban)
       - minor doc improvements #25 (ether)
       - fix d_Gconvert test in t/11_pc_expo.t for 5.6

3.0104 2014-04-26 (rurban)
       - add t/z_leaktrace.t
       - restore build on C89 (bulk88)
       - fix small cxt->sv_json leak on interp exit (bulk88)

3.0103 2014-04-21 (rurban)
       - Change booleans interop logic (again) for JSON-XS-3.01
         Check now for Types::Serialiser::Boolean ie JSON::PP::Boolean refs (#18 clintongormley)
         to avoid allow_blessed for JSON-XS-3.01 booleans.
       - fix boolean representation for JSON-XS-3.01/Types::Serialiser::Boolean interop
         (arrayref, not hashref)
       - add t/52_object.t from JSON::XS
       - backport encode_hv HE sort on stack < 64 or heap to avoid stack
         overflows from JSON-XS-3.01. do not use alloca.
       - backport allow_tags, decode_tag, FREEZE/THAW callbacks from JSON-XS-3.01
       - added pod for OBJECT SERIALISATION (allow_tags, FREEZE/THAW)

3.0102 2014-04-17 (rurban + bulk88)
       - Added PERL_NO_GET_CONTEXT for better performance on threaded Perls (bulk88)
       - MANIFEST: added t/96_interop.t
       - Document deprecated functions
       - Change booleans interop logic for JSON-XS-3.01

3.0101 2014-04-15 (rurban + bulk88)
       - Added ithreads support (bulk88)
         Cpanel::JSON::XS is now thread-safe.
       - const'ed a translation table for memory savings (bulk88)
       - Fixed booleans for JSON 2.9 and JSON-XS-3.01 interop.
         JSON does not support JSON::XS booleans anymore, so
         I cannot think of any reason to still use JSON::XS.

2.3404 2014-01-30 (rurban)
       - fix interop with JSON::XS booleans
         the internal boolean objects are now blessed into JSON::XS::Boolean
         #13 and [cpan #92548] (samuel.c.kaufman)
       - t/96_interop.t: added
       - LICENSE section to pod added for t/z_kwalitee.t
       - README: fixed some pod spelling errors in (David Steinbrunner)

2.3403 2013-11-02 (cpanel)
       - fix json_atof on AIX without HAS_LONG_DOUBLE (powl in libm)
         [cpan #88061] (Ulisse Monari, Reini Urban)

2.3402 2013-11-02 (cpanel)
       - t/97_unshare_hek.t: fix issue #10, unshare hek assertion resp. valgrind error
       - Rename internal 5.6 methods {from|to}_json_ to _{from|to}_json
       - Fixed get_binary pod
       - Added t/z_*.t maintainer tests

2.3401 2013-10-02 (cpanel)
       - add more binary tests, including 5.6
       - improve POD for binary and cPanel fork
       - Fix homepage META

2.3314 2013-09-09 (cpanel)
       - t/01_utf8.t: workaround for stricter Encode versions (syohex)
       - autogenerate META files

2.3313 2013-06-26 (cpanel)
       - Fix re-blessing of READONLY data (chip) [GH issue #7].
       - Depend on Pod::Usage 1.36. 1.51 was added with 2.3306
       - t/01_utf8.t: workaround for stricter Encode versions [RT #84244]
       - avoid <5.10 const warnings with sv_chop

2.3312 2013-05-22 (cpanel)
       - Made common::sense optional to get smaller FatPacker packages.

2.3311 2013-04-04 18:41:23 (cpanel)
       - Changed maintainer to cpan@cpanel.net
       - Changed tracker to RT
       - Worked on JSON integration (matching prototypes)
       - Fixed Boolean stringify and eq overload methods to match JSON (Fixes JSON tests)

2.3310 2013-03-28 12:20:11 (rurban)
       - add testcases for JSON::XS RT #84244, double-encoding with utf8
         t/01_utf8.t (use utf8), t/14_latin1.t (no utf8)
       - t/01_utf8.t: enable and fix more 5.6 testcases

2.3309 2013-03-28 09:37:29 (rurban)
       - fix 19_incr.t broken with 5.17.10 hash randomization [JSON::XS RT #84151]
         by wyant @ cpan.org

2.3308 2013-03-28 09:10:45 (rurban)
       - fix 5.6 binary utf8 encoding, harmonized with newer perls
         5.6. encodes strings to utf8 internally when seeing a codepoint >= 0x80.
	 with binary decode it to the original bytes before encoding it to escaped JSON.

2.3307 2013-03-27 17:27:18 (rurban)
       - fix lots of -Wincompatible-pointer-types and -Wpointer-sign warnings
       - add binary method
       - write and accept \xNN JSON encoding with binary only,
         also accept octal \0NNN JSON with binary

2.3306 2013-03-27 12:15:20 (rurban)
       - fix decode_utf8 for 5.6 (bdraco)
       - use common::sense for tests
       - fix README dependency: update earlier, not just at make dist
       - added pod2text prereqs

2.3305 2013-03-27 11:47:36 (rurban)
       - nondev version to be indexed in CPAN
       - t/99_binary.t: non-numeric test names, use is instead of ok
       - added META data to Makefile.PL

2.33_04 2013-03-01 15:42:39 (rurban)
	- fix for 5.6 compiler:
	  $json->incr_text may not be called as lvalue,
	  missing attributes::reftype

2.33_03 2013-02-28 17:22:52 (bdraco)
	- revert fix crash with invalid JSON, empty sv 
    
2.33_02 2012-08-17 16:29:52 (rurban)
	- fix crash with invalid JSON, empty sv 

2.33_01 2012-08-08 16:29:52 (rurban)
	- merge with JSON-XS-2.33

2.33 2012-08-01 21:03:52 2012
	- internal encode/decode XS wrappers did not expect stack
          moves caused by callbacks (analyzed and testcase by Jesse Luehrs).
	- add bencode as to/from option in bin/json_xs.
        - add -e option to json_xs, and none and string in/out formats.

2.32_02 2012-06-27 19:59:18 (rurban)
	- forked from JSON-XS-2.32
	- Cpanel perl-5.6.2 support
	- prefix with Cpanel

2.32 2011-08-11 19:06:38
	- fix a bug in the initial whitespace accumulation.

2.31 2011-07-27 17:53:05
	- don't accumulate initial whitespace in the incremental buffer
          (this can be useful to allow whitespace-keepalive on a tcp
          connection without triggering the max_size limit).
	- properly croak on some invalid inputs that are not strings
          (e.g. undef) when trying to decode a json text (reported
          and analyzed by Goro Fuji).

2.3  2010-08-18 01:26:47
	- make sure decoder doesn't change the decoding in the incremental
          parser (testcase provided by Hendrik Schumacher).
	- applied patch by DaTa for Data::Dumper support in json_xs.
        - added -t dump support to json_xs, using Data::Dump.
        - added -f eval support to json_xs.

2.29  2010-03-17 02:39:12
	- fix a memory leak when callbacks set using filter_json_object
          or filter_json_single_key_object were called (great testcase
          by Eric Wilhelm).

2.28  2010-03-11 20:30:46
	- implement our own atof function - perl's can be orders of
          magnitudes slower than even the system one. on the positive
          side, ours seems to be more exact in general than perl's.
          (testcase provided by Tim Meadowcroft).
        - clarify floating point conversion issues a bit.
	- update jpsykes csrf article url.
        - updated benchmark section - JSON::PP became much faster!

2.27  2010-01-07 07:35:08
	- support relaxed option inside the incremental parser
          (testcase provided by IKEGAMI via Makamaka).

2.26  2009-10-10 03:26:19
	- big integers could become truncated (based on patch
          by Strobl Anton).
	- output format change: indent now adds a final newline, which is
          more expected and more true to the documentation.

2.25  2009-08-08 12:04:41
	- the perl debugger completely breaks lvalue subs - try to work
          around the issue.
	- ignore RMAGICAL hashes w.r.t. CANONICAL.
	- try to work around a possible char signedness issue on aix.
        - require common sense.

2.24  2009-05-30 08:25:45
	- the incremental parser did not update its parse offset
          pointer correctly when parsing utf8-strings (nicely
          debugged by Martin Evans).
	- appending a non-utf8-string to the incremental parser
          in utf8 mode failed to upgrade the string.
        - wording of parse error messages has been improved.

2.232 2009-02-22 11:12:25
	- use an exponential algorithm to extend strings, to
          help platforms with bad or abysmal==windows memory
          allocater performance, at the expense of some memory
          wastage (use shrink to recover this extra memory).
          (nicely analysed by Dmitry Karasik).

2.2311 2009-02-19 02:12:54
        - add a section "JSON and ECMAscript" to explain some
          incompatibilities between the two (problem was noted by
          various people).
	- add t/20_faihu.t.

2.231 2008-11-20 04:59:08
	- work around 5.10.0 magic bugs where manipulating magic values
          (such as $1) would permanently damage them as perl would
          ignore the magicalness, by making a full copy of the string,
          reported by Dmitry Karasik.
        - work around spurious warnings under older perl 5.8's.

2.23 2008-09-29 05:08:29
	- fix a compilation problem when perl is not using char * as, well,
          char *.
	- use PL_hexdigit in favour of rolling our own.

2.2222 2008-07-20 18:49:00
	- same game again, broken 5.10 finds yet another assertion
          failure, and the workaround causes additional runtime warnings.
          Work around the next assertion AND the warning. 5.10 seriously
          needs to adjust it's attitude against working code.

2.222 2008-07-19 06:15:34
	- you work around one -DDEBUGGING assertion bug in perl 5.10
          just to hit the next one. work around this one, too.

2.22  2008-07-15 13:26:51
	- allow higher nesting levels in incremental parser.
        - error out earlier in some cases in the incremental parser
          (as suggested by Yuval Kogman).
        - improve incr-parser test (Yuval Kogman).

2.21 2008-06-03 08:43:23
	- (hopefully) work around a perl 5.10 bug with -DDEBUGGING.
	- remove the experimental status of the incremental parser interface.
	- move =encoding around again, to avoid bugs with search.cpan.org.
          when can we finally have utf-8 in pod???
        - add ->incr_reset method.

2.2  2008-04-16 20:37:25
	- lifted the log2 rounding restriction of max_depth and max_size.
	- make booleans mutable by creating a copy instead of handing out
          the same scalar (reported by pasha sadri).
   	- added support for incremental json parsing (still EXPERIMENTAL).
	- implemented and added a json_xs command line utility that can convert
          from/to a number of serialisation formats - tell me if you need more.
        - implement allow_unknown/get_allow_unknown methods.
        - fixed documentation of max_depth w.r.t. higher and equal.
	- moved down =encoding directive a bit, too much breaks if it's the first
          pod directive :/.
        - removed documentation section on other modules, it became somewhat
          outdated and is nowadays mostly of historical interest.

2.1  2008-03-19 23:23:18
        - update documentation here and there: add a large section
          about utf8/latin1/ascii flags, add a security consideration
          and extend and clarify the JSON and YAML section.
        - medium speed enhancements when encoding/decoding non-ascii chars.
        - minor speedup in number encoding case.
	- extend and clarify the section on incompatibilities
          between YAML and JSON.
        - switch to static inline from just inline when using gcc.
        - add =encoding utf-8 to the manpage, now that perl 5.10 supports it.
        - fix some issues with UV to JSON conversion of unknown impact.
        - published the yahoo locals search result used in benchmarks as the
          original url changes so comparison is impossible.

2.01 2007-12-05 11:40:28
	- INCOMPATIBLE API CHANGE: to_json and from_json have been
          renamed to encode_json/decode_json for JSON.pm compatibility.
          The old functions croak and might be replaced by JSON.pm
          comaptible versions in some later release.

2.0  2007-12-04 11:30:46
	- this is supposed to be the first version of JSON::XS
          compatible with version 2.0+ of the JSON module.
          Using the JSON module as frontend to JSON::XS should be
          as fast as using JSON::XS directly, so consider using it
          instead.
	- added get_* methods for all "simple" options.
        - make JSON::XS subclassable.

1.53 2007-11-13 23:58:33
	- minor doc clarifications.
        - fixed many doc typos (patch by Thomas L. Shinnick).

1.52 2007-10-15 03:22:06
	- remove =encoding pod directive again, it confuses too many pod
          parsers :/.

1.51 2007-10-13 03:55:56
	- encode empty arrays/hashes in a compact way when pretty is enabled.
	- apparently JSON::XS was used to find some bugs in the
          JSON_checker testsuite, so add (the corrected) JSON_checker tests to
          the testsuite.
        - quite a bit of doc updates/extension.
        - require 5.8.2, as this seems to be the first unicode-stable version.

1.5  2007-08-28 04:05:38
	- add support for tied hashes, based on ideas and testcase by
          Marcus Holland-Moritz.
        - implemented relaxed parsing mode where some extensions are being
          accepted. generation is still JSON-only.

1.44 2007-08-22 01:02:44
	- very experimental process-emulation support, slowing everything down.
          the horribly broken perl threads are still not supported - YMMV.

1.43 2007-07-26 13:26:37
	- convert big json numbers exclusively consisting of digits to NV
          only when there is no loss of precision, otherwise to string.

1.42 2007-07-24 00:51:18
	- fix a crash caused by not handling missing array elements
          (report and testcase by Jay Kuri).

1.41 2007-07-10 18:21:44
	- fix compilation with NDEBUG (assert side-effect),
          affects convert_blessed only.
	- fix a bug in decode filters calling ENTER; SAVETMPS;
          one time too often.
        - catch a typical error in TO_JSON methods.
	- antique-ised XS.xs again to work with outdated
          C compilers (windows...).

1.4  2007-07-02 10:06:30
	- add convert_blessed setting.
        - encode did not catch all blessed objects, encoding their
          contents in most cases. This has been fixed by introducing
          the allow_blessed setting.
        - added filter_json_object and filter_json_single_key_object
          settings that specify a callback to be called when
          all/specific json objects are encountered.
        - assume that most object keys are simple ascii words and
          optimise this case, penalising the general case. This can
          speed up decoding by 30% in typical cases and gives
          a smaller and faster perl hash.
        - implemented simpleminded, optional resource size checking
          in decode_json.
        - remove objToJson/jsonToObj aliases, as the next version
          of JSON will not have them either.
        - bit the bullet and converted the very simple json object
          into a more complex one.
        - work around a bug where perl wrongly claims an integer
          is not an integer.
        - unbundle JSON::XS::Boolean into own pm file so Storable
          and similar modules can resolve the overloading when thawing.

1.3  2007-06-24 01:55:02
        - make JSON::XS::true and false special overloaded objects
          and return those instead of 1 and 0 for those json atoms
          (JSON::PP compatibility is NOT achieved yet).
        - add JSON::XS::is_bool predicate to test for those special
          values.
	- add a reference to
          http://jpsykes.com/47/practical-csrf-and-json-security.
        - removed require 5.8.8 again, it is just not very expert-friendly.
          Also try to be more compatible with slightly older versions,
          which are not recommended (because they are buggy).

1.24 2007-06-11 05:40:49
	- added informative section on JSON-as-YAML.
        - get rid of some c99-isms again.
        - localise dec->cur in decode_str, speeding up
          string decoding considerably (>15% on my amd64 + gcc).
        - increased SHORT_STRING_LEN to 16kb: stack space is
          usually plenty, and this actually saves memory
          when !shrinking as short strings will fit perfectly.

1.23 2007-06-06 20:13:06
	- greatly improved small integer encoding and decoding speed.
	- implement a number of µ-optimisations.
        - updated benchmarks.

1.22 2007-05-24 00:07:25
	- require 5.8.8 explicitly as older perls do not seem to offer
          the required macros.
        - possibly made it compile on so-called C compilers by microsoft.

1.21 2007-05-09 18:40:32
	- character offset reported for trailing garbage was random.

1.2  2007-05-09 18:35:01
        - decode did not work with magical scalars (doh!).
        - added latin1 flag to produce JSON texts in the latin1 subset
          of unicode.
        - flag trailing garbage as error.
        - new decode_prefix method that returns the number
          of characters consumed by a decode.
        - max octets/char in perls UTF-X is actually 13, not 11,
          as pointed out by Glenn Linderman.
	- fixed typoe reported by YAMASHINA Hio.

1.11 2007-04-09 07:05:49
	- properly 0-terminate sv's returned by encode to help
          C libraries that expect that 0 to be there.
	- partially "port" JSON from C to microsofts fucking broken
          pseudo-C. They should be burned to the ground for pissing
          on standards. And I should be stoned for even trying to
          support this filthy excuse for a c compiler.

1.1  2007-04-04 01:45:00
	- clarify documentation (pointed out by Quinn Weaver).
        - decode_utf8 sometimes did not correctly flag errors,
          leading to segfaults.
        - further reduced default nesting depth to 512 due to the test
          failure by that anonymous "chris" whose e-mail address seems
          to be impossible to get. Tests on other freebsd systems indicate
          that this is likely a problem in his/her configuration and not this
          module.
        - renamed json => JSON in error messages.
        - corrected the character offset in some error messages.

1.01 2007-03-31 16:15:40
	- do not segfault when from_json/decode gets passed
          a non-string object (reported by Florian Ragwitz).
          This has no effect on normal operation.

1.0  2007-03-29 04:43:34
	- the long awaited (by me) 1.0 version.
        - add \0 (JSON::XS::false) and \1 (JSON::XS::true) mappings to JSON
          true and false.
	- add some more notes to shrink, as suggested by Alex Efros.
        - improve testsuite.
        - halve the default nesting depth limit, to hopefully make it
          work on Freebsd (unfortunately, the cpan tester did not
          send me his report, so I cannot ask about the stack limit on fbsd).

0.8  2007-03-26 00:10:48
	- fix a memleak when decoding hashes.
	- export jsonToBj and objToJson as aliases
          to to_json and from_json, to reduce incompatibilities
          between JSON/JSON::PC and JSON::XS. (experimental).
        - implement a maximum nesting depth for both en- and de-coding.
        - added a security considerations sections.

0.7  2007-03-25 01:46:30
	- code cleanup.
	- fix a memory overflow bug when indenting.
        - pretty-printing now up to 15% faster.
        - improve decoding speed of strings by
          up to 50% by specialcasing short strings.
        - further decoding speedups for strings using
          lots of \u escapes.
        - improve utf8 decoding speed for U+80 .. U+7FF.

0.5  2007-03-24 20:41:51
	- added the UTF-16 encoding example hinted at in previous
          versions.
        - minor documentation fixes.
        - fix a bug in and optimise canonicalising fastpath
          (reported by Craig Manley).
        - remove a subtest that breaks with bleadperl (reported
          by Andreas König).

0.31 2007-03-24 02:14:34
	- documentation updates.
        - do some casting to hopefully fix Andreas' problem.
        - nuke bogus json rpc stuff.

0.3  2007-03-23 19:33:21
	- remove spurious PApp::Util reference (John McNamara).
	- adapted lots of tests from other json modules
          (idea by Chris Carline).
        - documented mapping from json to perl and vice versa.
        - improved the documentation by adding more examples.
        - added short escaping forms, reducing the created
          json texts a bit.
        - added shrink flag.
        - when flag methods are called without enable argument
          they will by default enable their flag.
        - considerably improved string encoding speed (at least
          with gcc 4).
        - added a test that covers lots of different characters.
        - clarified some error messages.
        - error messages now use correct character offset
          with F_UTF8.
        - improve the "no bytes" and "no warnings" hacks in
          case the called functions do... stuff.
        - croak when encoding to ascii and an out-of-range
          (non-unicode) codepoint is encountered.

0.2  2007-03-23 00:23:34
	- the "could not sleep without debugging release".
          it should basically work now, with many bugs as
          no production tests have been run yet.
	- added more testcases.
	- the expected shitload of bugfixes.
	- handle utf8 flag correctly in decode.
        - fix segfault in decoder.
        - utf8n_to_uvuni sets retlen to -1, but retlen is an
          unsigned types (argh).
        - fix decoding of utf-8 strings.
        - improved error diagnostics.
        - fix decoding of 'null'.
        - fix parsing of empty array/hashes
        - silence warnings when we prepare the croak message.

0.1   2007-03-22 22:13:43
	- first release, very untested, basically just to claim
          the namespace.
 
0.01  2007-03-22 06:08:12
	- original version; cloned from Convert-Scalar

