summaryrefslogtreecommitdiffstats
path: root/comm/third_party/json-c/ChangeLog
blob: b03a77710e9af018fccea42b7c5f8aa2c79faa94 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
0.16 (up to commit 66dcdf5, 2022-04-13)
========================================

Deprecated and removed features:
--------------------------------
* JSON_C_OBJECT_KEY_IS_CONSTANT is deprecated in favor of
  JSON_C_OBJECT_ADD_CONSTANT_KEY
* Direct access to lh_table and lh_entry structure members is deprecated.  
  Use access functions instead, lh_table_head(), lh_entry_next(), etc...
* Drop REFCOUNT_DEBUG code.

New features
------------
* The 0.16 release introduces no new features

Build changes
-------------
* Add a DISABLE_EXTRA_LIBS option to skip using libbsd
* Add a DISABLE_JSON_POINTER option to skip compiling in json_pointer support.

Significant changes and bug fixes
---------------------------------
* Cap string length at INT_MAX to avoid various issues with very long strings.
* json_object_deep_copy: fix deep copy of strings containing '\0'
* Fix read past end of buffer in the "json_parse" command
* Avoid out of memory accesses in the locally provided vasprintf() function
  (for those platforms that use it)
* Handle allocation failure in json_tokener_new_ex
* Fix use-after-free in json_tokener_new_ex() in the event of printbuf_new() returning NULL
* printbuf_memset(): set gaps to zero - areas within the print buffer which
  have not been initialized by using printbuf_memset
* printbuf: return -1 on invalid arguments (len < 0 or total buffer > INT_MAX)
* sprintbuf(): propagate printbuf_memappend errors back to the caller

Optimizations
--------------
* Speed up parsing by replacing ctype functions with simplified, faster 
  non-locale-sensitive ones in json_tokener and json_object_to_json_string.
* Neither vertical tab nor formfeed are considered whitespace per the JSON spec
* json_object: speed up creation of objects, calloc() -> malloc() + set fields
* Avoid needless extra strlen() call in json_c_shallow_copy_default() and
  json_object_equal() when the object is known to be a json_type_string.

Other changes
-------------
* Validate size arguments in arraylist functions.
* Use getrandom() if available; with GRND_NONBLOCK to allow use of json-c
  very early during boot, such as part of cryptsetup.
* Use arc4random() if it's available.
* random_seed: on error, continue to next method instead of exiting the process
* Close file when unable to read from /dev/urandom in get_dev_random_seed()

***

0.15 (up to commit 870965e, 2020/07/26)
========================================

Deprecated and removed features:
--------------------------------
* Deprecate `array_list_new()` in favor of `array_list_new2()`
* Remove the THIS_FUNCTION_IS_DEPRECATED define.
* Remove config.h.win32

New features
------------
* Add a `JSON_TOKENER_ALLOW_TRAILING_CHARS` flag to allow multiple objects
  to be parsed even when `JSON_TOKENER_STRICT` is set.
* Add `json_object_new_array_ext(int)` and `array_list_new_2(int)` to allow
   arrays to be allocated with the exact size needed, when known.
* Add `json_object_array_shrink()` (and `array_list_shrink()`) and use it in 
   json_tokener to minimize the amount of memory used.
* Add a json_parse binary, for use in testing changes (not installed, but 
   available in the apps directory).

Build changes
-------------
* #639/#621 - Add symbol versions to all exported symbols
* #508/#634 - Always enable -fPIC to allow use of the json-c static library in
   other libraries
* Build both static and shared libraries at the same time.
* #626 - Restore compatibility with cmake 2.8 
* #471 - Always create directories with mode 0755, regardless of umask.
* #606/#604 - Improve support for OSes like AIX and IBM i, as well as for
   MINGW32 and old versions of MSVC
* #451/#617 - Add a DISABLE_THREAD_LOCAL_STORAGE cmake option to disable 
   the use of thread-local storage.

Significant changes and bug fixes
---------------------------------
* Split the internal json_object structure into several sub-types, one for
   each json_type (json_object_object, json_object_string, etc...).
  This improves memory usage and speed, with the benchmark under
   bench/ report 5.8% faster test time and 6%(max RSS)-12%(peak heap)
   less memory usage.
  Memory used just for json_object structures decreased 27%, so use cases
   with fewer arrays and/or strings would benefit more.
* Minimize memory usage in array handling in json_tokener by shrinking
   arrays to the exact number of elements parsed.  On bench/ benchmark:
   9% faster test time, 39%(max RSS)-50%(peak heap) less memory usage.
   Add json_object_array_shrink() and array_list_shrink() functions.
* #616 - Parsing of surrogate pairs in unicode escapes now properly handles
   incremental parsing.
* Fix incremental parsing of numbers, especially those with exponents, e.g.
   so parsing "[0", "e+", "-]" now properly returns an error.
  Strict mode now rejects missing exponents ("0e").
* Successfully return number objects at the top level even when they are
   followed by a "-", "." or "e".  This makes parsing things like "123-45"
   behave consistently with things like "123xyz".

Other changes
-------------
* #589 - Detect broken RDRAND during initialization; also, fix segfault
    in the CPUID check.
* #592 - Fix integer overflows to prevert out of bounds write on large input.
* Protect against division by zero in linkhash, when created with zero size.
* #602 - Fix json_parse_uint64() internal error checking, leaving the retval
    untouched in more failure cases.
* #614 - Prevent truncation when custom double formatters insert extra \0's


***

0.14 (up to commit 9ed00a6, 2020/04/14)
=========================================

Deprecated and removed features:
--------------------------------
* bits.h has been removed
* lh_abort() has been removed
* lh_table_lookup() has been removed, use lh_table_lookup_ex() instead.
* Remove TRUE and FALSE defines, use 1 and 0 instead.

Build changes:
--------------
## Deprecated and removed features:
* bits.h has been removed
* lh_abort() has been removed
* lh_table_lookup() has been removed, use lh_table_lookup_ex() instead.
* Remove TRUE and FALSE defines, use 1 and 0 instead.
* autoconf support, including autogen.sh, has been removed.  See details about cmake, below.
* With the addition of json_tokener_get_parse_end(), access to internal fields of json_tokener, as well as use of many other symbols and types in json_tokener.h, is deprecated now.
* The use of Android.configure.mk to build for Android no longer works, and it is unknown how (or if) the new cmake-based build machinery can be used.
    * Reports of success, or pull requests to correct issues are welcome.

## Notable improvements and new features

### Builds and documentation
* Build machinery has been switched to CMake.  See README.md for details about how to build.
    * TL;DR: `mkdir build ; cd build ; cmake -DCMAKE_INSTALL_PREFIX=/some/path ../json-c ; make all test install`
    * To ease the transition, there is a `cmake-configure` wrapper that emulates the old autoconf-based configure script.
    * This has enabled improvements to the build on Windows system; also all public functions have been fixed to be properly exported.  For best results, use Visual Studio 2015 or newer.
* The json-c style guide has been updated to specify the use of clang-format, and all code has been reformatted.
    * Since many lines of code have trivial changes now, when using git blame, be sure to specify -w
* Numerous improvements have been made to the documentation including function effects on refcounts, when passing a NULL is safe, and so on.

### json_tokener changes
* Added a json_tokener_get_parse_end() function to replace direct access of tok->char_offset.
    * The char_offset field, and the rest of the json_tokener structure remain exposed for now, but expect a future release to hide it like is done with json_object_private.h
* json_tokener_parse_ex() now accepts a new JSON_TOKENER_VALIDATE_UTF8 flag to validate that input is UTF8.
    * If validation fails, json_tokener_get_error(tok) will return json_tokener_error_parse_utf8_string (see enum json_tokener_error).

### Other changes and additions
* Add support for unsigned 64-bit integers, uint64_t, to gain one extra bit of magnitude for positive ints.
    * json_tokener will now parse values up to UINT64_MAX (18446744073709551615)
    * Existing methods returning int32_t or int64_t will cap out-of-range values at INT32_MAX or INT64_MAX, preserving existing behavior.
    * The implementation includes the possibility of easily extending this to larger sizes in the future.
* A total of 7 new functions were added:
    * json_object_get_uint64 ( struct json_object const* jso )
    * json_object_new_uint64 ( uint64_t i )
    * json_object_set_uint64 ( struct json_object* jso, uint64_t new_value )
    * json_parse_uint64 ( char const* buf, uint64_t* retval )
        * See description of uint64 support, above.
    * json_tokener_get_parse_end ( struct json_tokener* tok )
        * See details under "json_tokener changes", above.
    * json_object_from_fd_ex ( int fd, int in_depth )
        * Allows the max nesting depth to be specified.
    * json_object_new_null ( )
        * Simply returns NULL.  Its use is not recommended.
* The size of struct json_object has decreased from 96 bytes to 88 bytes.

### Testing
* Many updates were made to test cases, increasing code coverage.
* There is now a quick way (JSONC_TEST_TRACE=1) to turn on shell tracing in tests.
* To run tests, use `make test`; the old "check" target no longer exists.

## Significant bug fixes
For the full list of issues and pull requests since the previous release, please see issues_closed_for_0.14.md

* [Issue #389](https://github.com/json-c/json-c/issues/389): Add an assert to explicitly crash when _ref_count is corrupted, instead of a later "double free" error.
* [Issue #407](https://github.com/json-c/json-c/issues/407): fix incorrect casts in calls to ctype functions (isdigit and isspace) so we don't crash when asserts are enabled on certain platforms and characters > 128 are parsed.
* [Issue #418](https://github.com/json-c/json-c/issues/418): Fix docs for json_util_from_fd and json_util_from_file to say that they return NULL on failures.
* [Issue #422](https://github.com/json-c/json-c/issues/422): json_object.c:set errno in json_object_get_double() when called on a json_type_string object with bad content.
* [Issue #453](https://github.com/json-c/json-c/issues/453): Fixed misalignment in JSON serialization when JSON_C_TO_STRING_SPACED and JSON_C_TO_STRING_PRETTY are used together.
* [Issue #463](https://github.com/json-c/json-c/issues/463): fix newlocale() call to use LC_NUMERIC_MASK instead of LC_NUMERIC, and remove incorrect comment.
* [Issue #486](https://github.com/json-c/json-c/issues/486): append a missing ".0" to negative double values to ensure they are serialized as floating point numbers.
* [Issue #488](https://github.com/json-c/json-c/issues/488): use JSON_EXPORT on functions so they are properly exported on Windows.
* [Issue #539](https://github.com/json-c/json-c/issues/539): use an internal-only serializer function in json_object_new_double_s() to avoid potential conflicts with user code that uses the json_object_userdata_to_json_string serializer.

***

0.13.1 (up to commit 0f814e5, 2018/03/04)
=========================================

* Bump the major version of the .so library generated up to 4.0 to avoid
  conflicts because some downstream packagers of json-c had already done
  their own bump to ".so.3" for a much older 0.12 release.
* Add const size_t json_c_object_sizeof()
* Avoid invalid free (and thus a segfault) when ref_count gets < 0
* PR#394: fix handling of custom double formats that include a ".0"
* Avoid uninitialized variable warnings in json_object_object_foreach
* Issue #396: fix build for certain uClibc based systems.
* Add a top level fuzz directory for fuzzers run by OSS-Fuzz


0.13 (up to commit 5dae561, 2017/11/29)
=================================

This release, being three and a half years after the 0.12 branch (f84d9c),
   has quite a number of changes included.  The following is a sampling of
   the most significant ones.

Since the 0.12 release, 250 issues and pull requests have been closed.
See issues_closed_for_0.13.md for a complete list.


Deprecated and removed features:
--------------------------------
* All internal use of bits.h has been eliminated.  The file will be removed.
	Do not use: hexdigit(), error_ptr(), error_descrition() and it_error()
* lh_abort() is deprecated.  It will be removed.

Behavior changes:
-----------------
* Tighten the number parsing algorithm to raise errors instead of truncating
     the results.  For example 12.3.4 or 2015-01-15, which now return null.
	 See commit 99d8fc

* Use size_t for array length and size.  Platforms where sizeof(size_t) != sizeof(int) may not be backwards compatible
	See commits 45c56b, 92e9a5 and others.

* Check for failure when allocating memory, returning NULL and errno=ENOMEM.
	 See commit 2149a04.

* Change json_object_object_add() return type from void to int, and will return -1 on failures, instead of exiting. (Note: this is not an ABI change)

New features:
-------------
* We're aiming to follow RFC 7159 now.

* Add a couple of additional option to json_object_to_json_string_ext:
	JSON_C_TO_STRING_PRETTY_TAB
	JSON_C_TO_STRING_NOSLASHESCAPE

* Add a json_object_object_add_ex() function to allow for performance
	improvements when certain constraints are known to be true.

* Make serialization format of doubles configurable, in two different ways:
	Call json_object_set_serializer with json_object_double_to_json_string and a custom
	 format on each double object, or
	Call json_c_set_serialization_double_format() to set a global or thread-wide format.

* Add utility function for comparing json_objects - json_object_equal()

* Add a way to copy entire object trees: json_object_deep_copy()
* Add json_object_set_<type> function to modify the value of existing json_object's
 without the need to recreate them.  Also add a json_object_int_inc function to
 adjust an int's value.
* Add support for JSON pointer, RFC 6901.  See json_pointer.h
* Add a json_util_get_last_err() function to retrieve the string describing the
 cause of errors, instead of printing to stderr.
* Add perllike hash function for strings, and json_global_set_string_hash() 8f8d03d
* Add a json_c_visit() function to provide a way to iterate over a tree of json-c objects.

Notable bug fixes and other improvements:
-----------------------------------------
* Make reference increment and decrement atomic to allow passing json objects between threads.
* Fix json_object_object_foreach to avoid uninitialized variable warnings.
* Improve performance by removing unneeded data items from hashtable code and reducing duplicate hash computation.
* Improve performance by storing small strings inside json_object
* Improve performance of json_object_to_json_string by removing variadic printf. commit 9ff0f49
* Issue #371: fix parsing of "-Infinity", and avoid needlessly copying the input when doing so.
* Fix stack buffer overflow in json_object_double_to_json_string_format() - commit 2c2deb87
* Fix various potential null ptr deref and int32 overflows
* Issue #332: fix a long-standing bug in array_list_put_idx() where it would attempt to free previously free'd entries due to not checking the current array length.
* Issue #195: use uselocale() instead of setlocale() in json_tokener to behave better in threaded environments.
* Issue #275: fix out of bounds read when handling unicode surrogate pairs.
* Ensure doubles that happen to be a whole number are emitted with ".0" - commit ca7a19
* PR#331: for Visual Studio, use a snprintf/vsnprintf wrapper that ensures the string is terminated.
* Fix double to int cast overflow in json_object_get_int64.
* Clamp double to int32 when narrowing in json_object_get_int.
* Use strtoll() to parse ints - instead of sscanf
* Miscellaneous smaller changes, including removing unused variables, fixing warning
 about uninitialized variables adding const qualifiers, reformatting code, etc...

Build changes:
--------------
* Add Appveyor and Travis build support
* Switch to using CMake when building on Windows with Visual Studio.
	A dynamic .dll is generated instead of a .lib
	config.h is now generated, config.h.win32 should no longer be manually copied
* Add support for MacOS through CMake too.
* Enable silent build by default
* Link against libm when needed
* Add support for building with AddressSanitizer
* Add support for building with Clang
* Add a --enable-threading configure option, and only use the (slower) __sync_add_and_fetch()/__sync_sub_and_fetch() function when it is specified.

List of new functions added:
----------------------------
### json_object.h
* array_list_bsearch()
* array_list_del_idx()
* json_object_to_json_string_length()
* json_object_get_userdata()
* json_object_set_userdata()
* json_object_object_add_ex()
* json_object_array_bsearch()
* json_object_array_del_idx()
* json_object_set_boolean()
* json_object_set_int()
* json_object_int_inc()
* json_object_set_int64()
* json_c_set_serialization_double_format()
* json_object_double_to_json_string()
* json_object_set_double()
* json_object_set_string()
* json_object_set_string_len()
* json_object_equal()
* json_object_deep_copy()

### json_pointer.h
* json_pointer_get()
* json_pointer_getf()
* json_pointer_set()
* json_pointer_setf()

### json_util.h
* json_object_from_fd()
* json_object_to_fd()
* json_util_get_last_err()

### json_visit.h
* json_c_visit()

### linkhash.h
* json_global_set_string_hash()
* lh_table_resize()

### printbuf.h
* printbuf_strappend()


0.12.1
======

  * Minimal changes to address compile issues.

0.12
====

  * Address security issues:
    * CVE-2013-6371: hash collision denial of service
    * CVE-2013-6370: buffer overflow if size_t is larger than int

  * Avoid potential overflow in json_object_get_double

  * Eliminate the mc_abort() function and MC_ABORT macro.

  * Make the json_tokener_errors array local.  It has been deprecated for
     a while, and json_tokener_error_desc() should be used instead.

  * change the floating point output format to %.17g so values with
     more than 6 digits show up in the output.

  * Remove the old libjson.so name compatibility support.  The library is
      only created as libjson-c.so now and headers are only installed
      into the ${prefix}/json-c directory.

  * When supported by the linker, add the -Bsymbolic-functions flag.

  * Various changes to fix the build on MSVC.

  * Make strict mode more strict:
    * number must not start with 0
    * no single-quote strings
    * no comments
    * trailing char not allowed
    * only allow lowercase literals

  * Added a json_object_new_double_s() convenience function to allow
    an exact string representation of a double to be specified when
    creating the object and use it in json_tokener_parse_ex() so
    a re-serialized object more exactly matches the input.

  * Add support NaN and Infinity


0.11
====

  * IMPORTANT: the name of the library has changed to libjson-c.so and
     the header files are now in include/json-c.
     The pkgconfig name has also changed from json to json-c.
     You should change your build to use appropriate -I and -l options.
     A compatibility shim is in place so builds using the old name will
     continue to work, but that will be removed in the next release.
  * Maximum recursion depth is now a runtime option.
     json_tokener_new() is provided for compatibility.
     json_tokener_new_ex(depth)
  * Include json_object_iterator.h in the installed headers.
  * Add support for building on Android.
  * Rewrite json_object_object_add to replace just the value if the key already exists so keys remain valid.
  * Make it safe to delete keys while iterating with the json_object_object_foreach macro.
  * Add a json_set_serializer() function to allow the string output of a json_object to be customized.
  * Make float parsing locale independent.
  * Add a json_tokener_set_flags() function and a JSON_TOKENER_STRICT flag.
  * Enable -Werror when building.
  * speed improvements to parsing 64-bit integers on systems with working sscanf
  * Add a json_object_object_length function.
  * Fix a bug (buffer overrun) when expanding arrays to more than 64 entries.

0.10
====

  * Add a json_object_to_json_string_ext() function to allow output to be
     formatted in a more human readable form.
  * Add json_object_object_get_ex(), a NULL-safe get object method, to be able
     to distinguish between a key not present and the value being NULL.
  * Add an alternative iterator implementation, see json_object_iterator.h
  * Make json_object_iter public to enable external use of the
     json_object_object_foreachC macro.
  * Add a printbuf_memset() function to provide an efficient way to set and
     append things like whitespace indentation.
  * Adjust json_object_is_type and json_object_get_type so they return
      json_type_null for NULL objects and handle NULL passed to
      json_objct_object_get().
  * Rename boolean type to json_bool.
  * Fix various compile issues for Visual Studio and MinGW.
  * Allow json_tokener_parse_ex() to be re-used to parse multiple object.
     Also, fix some parsing issues with capitalized hexadecimal numbers and
     number in E notation.
  * Add json_tokener_get_error() and json_tokener_error_desc() to better
     encapsulate the process of retrieving errors while parsing.
  * Various improvements to the documentation of many functions.
  * Add new json_object_array_sort() function.
  * Fix a bug in json_object_get_int(), which would incorrectly return 0
    when called on a string type object.
    Eric Haszlakiewicz
  * Add a json_type_to_name() function.
    Eric Haszlakiewicz
  * Add a json_tokener_parse_verbose() function.
    Jehiah Czebotar
  * Improve support for null bytes within JSON strings.
    Jehiah Czebotar
  * Fix file descriptor leak if memory allocation fails in json_util
    Zachary Blair, zack_blair at hotmail dot com
  * Add int64 support. Two new functions json_object_net_int64 and
    json_object_get_int64. Binary compatibility preserved.
    Eric Haszlakiewicz, EHASZLA at transunion com
    Rui Miguel Silva Seabra, rms at 1407 dot org
  * Fix subtle bug in linkhash where lookup could hang after all slots
    were filled then successively freed.
    Spotted by Jean-Marc Naud, j dash m at newtraxtech dot com
  * Make json_object_from_file take const char *filename
    Spotted by Vikram Raj V, vsagar at attinteractive dot com
  * Add handling of surrogate pairs (json_tokener.c, test4.c, Makefile.am)
    Brent Miller, bdmiller at yahoo dash inc dot com
  * Correction to comment describing printbuf_memappend in printbuf.h
    Brent Miller, bdmiller at yahoo dash inc dot com

0.9
===
  * Add README.html README-WIN32.html config.h.win32 to Makefile.am
    Michael Clark, <michael@metaparadigm.com>
  * Add const qualifier to the json_tokener_parse functions
    Eric Haszlakiewicz, EHASZLA at transunion dot com
  * Rename min and max so we can never clash with C or C++ std library
    Ian Atha, thatha at yahoo dash inc dot com
  * Fix any noticeable spelling or grammar errors.
  * Make sure every va_start has a va_end.
  * Check all pointers for validity.
    Erik Hovland, erik at hovland dot org
  * Fix json_object_get_boolean to return false for empty string
    Spotted by Vitaly Kruglikov, Vitaly dot Kruglikov at palm dot com
  * optimizations to json_tokener_parse_ex(), printbuf_memappend()
    Brent Miller, bdmiller at yahoo dash inc dot com
  * Disable REFCOUNT_DEBUG by default in json_object.c
  * Don't use this as a variable, so we can compile with a C++ compiler
  * Add casts from void* to type of assignment when using malloc
  * Add #ifdef __cplusplus guards to all of the headers
  * Add typedefs for json_object, json_tokener, array_list, printbuf, lh_table
    Michael Clark, <michael@metaparadigm.com>
  * Null pointer dereference fix. Fix json_object_get_boolean strlen test
    to not return TRUE for zero length string. Remove redundant includes.
    Erik Hovland, erik at hovland dot org
  * Fixed warning reported by adding -Wstrict-prototypes
    -Wold-style-definition to the compilatin flags.
    Dotan Barak, dotanba at gmail dot com
  * Add const correctness to public interfaces
    Gerard Krol, g dot c dot krol at student dot tudelft dot nl

0.8
===
  * Add va_end for every va_start
    Dotan Barak, dotanba at gmail dot com
  * Add macros to enable compiling out debug code
    Geoffrey Young, geoff at modperlcookbook dot org
  * Fix bug with use of capital E in numbers with exponents
    Mateusz Loskot, mateusz at loskot dot net
  * Add stddef.h include
  * Patch allows for json-c compile with -Werror and not fail due to
    -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations
    Geoffrey Young, geoff at modperlcookbook dot org

0.7
===
  * Add escaping of backslash to json output
  * Add escaping of forward slash on tokenizing and output
  * Changes to internal tokenizer from using recursion to
    using a depth state structure to allow incremental parsing

0.6
===
  * Fix bug in escaping of control characters
    Johan Björklund, johbjo09 at kth dot se
  * Remove include "config.h" from headers (should only
    be included from .c files)
    Michael Clark <michael@metaparadigm.com>

0.5
===
  * Make headers C++ compatible by change *this to *obj
  * Add ifdef C++ extern "C" to headers
  * Use simpler definition of min and max in bits.h
    Larry Lansing, llansing at fuzzynerd dot com

  * Remove automake 1.6 requirement
  * Move autogen commands into autogen.sh. Update README
  * Remove error pointer special case for Windows
  * Change license from LGPL to MIT
    Michael Clark <michael@metaparadigm.com>

0.4
===
  * Fix additional error case in object parsing
  * Add back sign reversal in nested object parse as error pointer
    value is negative, while error value is positive.
    Michael Clark <michael@metaparadigm.com>

0.3
===
  * fix pointer arithmetic bug for error pointer check in is_error() macro
  * fix type passed to printbuf_memappend in json_tokener
  * update autotools bootstrap instructions in README
    Michael Clark <michael@metaparadigm.com>

0.2
===
  * printbuf.c - C. Watford (christopher.watford@gmail.com)
    Added a Win32/Win64 compliant implementation of vasprintf
  * debug.c - C. Watford (christopher.watford@gmail.com)
    Removed usage of vsyslog on Win32/Win64 systems, needs to be handled
    by a configure script
  * json_object.c - C. Watford (christopher.watford@gmail.com)
    Added scope operator to wrap usage of json_object_object_foreach, this
    needs to be rethought to be more ANSI C friendly
  * json_object.h - C. Watford (christopher.watford@gmail.com)
    Added Microsoft C friendly version of json_object_object_foreach
  * json_tokener.c - C. Watford (christopher.watford@gmail.com)
    Added a Win32/Win64 compliant implementation of strndup
  * json_util.c - C. Watford (christopher.watford@gmail.com)
    Added cast and mask to suffice size_t v. unsigned int conversion
    correctness
  * json_tokener.c - sign reversal issue on error info for nested object parse
    spotted by Johan Björklund (johbjo09 at kth.se)
  * json_object.c - escape " in json_escape_str
  * Change to automake and libtool to build shared and static library
    Michael Clark <michael@metaparadigm.com>

0.1
===
  * initial release