Version 2.9
===========

Released 2016-09-18

* New features:

  - Add ``json_auto_t`` to automatically decref a value that goes out
    of scope. Available only on GCC and Clang. (#301)

* Build:

  - Fix CMake build (at least on Linux) by removing conflicting
    jansson_config.h from the distribution (#306)

  - Change CMake install target generation to be optional (#305)

* Documentation:

  - Small documentation fixes.


Version 2.8
===========

Released 2016-08-30

* New features:

  - Always preserve insertion order of object items.
    `json_object_iter()` and friends, `json_object_foreach()` and
    `json_dumps()` and friends now always work in the insertion order of
    object items (#293).

  - Add `json_object_foreach_safe()` macro that allows
    `json_object_del()` calls during iteration (#230).

  - Add `json_get_alloc_funcs()` to allow reading the allocation
    functions set by `json_set_alloc_funcs()` (#262, #264).

  - Add `json_pack()` format specifiers s?, o? and O? for values that
    can be null (#261, #270).

* Bug fixes:

  - Fix a crash when parsing inputs consisting of very deeply nested
    arrays or objects (#282, #284).

  - Never convert numbers to integers in the parser when
    JSON_DECODE_INT_AS_REAL is set. This fixes error messages for
    overflowing numbers when JSON_DECODE_INT_AS_REAL is set (#212).

  - Fix a use-after-free in `json_pack()` error handling.

  - Fix subnormal number parsing on mingw32.

  - Handle out-of-memory situations gracefully in the hashtable
    implementation (#298).

* Build:

  - Fix build with CMake on all versions of Visual Studio up to 2015
    (#262, #289).

  - Fix pkgconfig libdir when using CMake (#268).

  - Fix CMake config for static CRT builds on Windows (#206).

  - Fix warnings on LLVM 6.0 targeting iOS arm64 (#208).

  - Add coverlls.io support via Travis for a nice test coverage badge
    (#211).

  - Don't expect ``jansson_config.h`` to be in the compiler's include
    path (#209).

  - Add a build-time option to set initial hashtable size (#213).

  - Use snprintf and strncpy in place of sprintf and strcpy to silence
    linker warnings on OpenBSD (#233).

* Documentation:

  - Fix various typos in documentation, and a broken link (#258).

  - Add an example program in ``examples/`` (#214, #217).

  - Fix building of documentation man pages (#207).

  - Document the fact that copying objects doesn't preserve the
    insertion order of keys (#237).

* Tests:

  - Don't use the nonstandard __FUNCTION__ macro in tests.

  - Use expr instead of $((...)) in shell scripts for Solaris 10
    compatibility.

  - Disable Visual Studio warning C4756 when triggered deliberately in
    tests (#216).

  - Other minor fixes (#221, #248).

* Other changes:

  - List all unrecognized object keys when strict unpacking fails
    (#263).

  - Alter the order of the members of the hashtable_pair struct for
    easier debugging.

  - Minor performance improvement to `json_dump()` and friends (#234).

  - Minor style fixes (#255, #257).


Version 2.7
===========

Released 2014-10-02

* New features:

  - `json_pack()` and friends: Add format specifiers ``s%`` and ``+%``
    for a size_t string length (#141).

  - `json_unpack()` and friends: Add format specifier ``s%`` for
    unpacking the string length along with the string itself (#141).

  - Add length-aware string constructors `json_stringn()` and
    `json_stringn_nocheck()`, length-aware string mutators
    `json_string_setn()` and `json_string_setn_nocheck()`, and a
    function for getting string's length `json_string_length()` (#141,
    #143).

  - Support ``\u0000`` escapes in the decoder. The support can be
    enabled by using the ``JSON_ALLOW_NUL`` decoding flag (#141).

  - Add `json_boolean_value()` as an alias for `json_is_true()`
    (#146).

  - Add JSON_REAL_PRECISION encoding flag/macro for controlling real
    number precision (#178).

  - Define the maximum indentation as JSON_MAX_INDENT (#191).

* Bug fixes:

  - Some malformed ``\uNNNN`` escapes could crash the decoder with an
    assertion failure.

  - Avoid integer overflows with very long strings in UTF-8 decoder and
    hashtable.

  - Check for *NULL* key in `json_object_get()` and
    `json_object_del()` (#151).

  - Enhance hashtable seeding on Windows (#162).

  - `json_unpack()`: Allow mixing JSON_STRICT with optional keys
    (#162, #163).

  - Fix int/int32 mismatch (#142).

  - Parse subnormal numbers correctly (#202).

* Build:

  - Remove VS2010 build files. CMake should be used on Windows instead
    (#165).

  - Fix CMake build flags for MinGW (#193).

  - Add CMake config files for find_package. Rename config.h to
    jansson_private_config.h (#157, #159).

  - Make Valgrind checks work with CMake (#160).

  - Fix feature checks to use correct __ATOMIC flags.

  - Fix CMake checks for uint16_t and uint8_t support (#177).

  - Make Jansson build on SmartOS/Solaris (#171).

  - Work around a GCC bug on Solaris (#175).

  - Fix autoreconf on Debian (#182).

  - Don't use GNU make specific export for global AM_CFLAGS (#203,
    #204).

  - Fix building on Android using the supplied Android.mk (#166,
    #174).

  - Android.mk: Add -DHAVE_STDINT_H to LOCAL_CFLAGS (#200).

* Documentation:

  - Document JANSSON_BUILD_SHARED_LIBS CMake option (#187).

* Tests:

  - Close file handles correctly (#198).

* Other changes:

  - ``\uNNNN`` escapes are now encoded in upper case for better
    readability.

  - Enable usage of AddressSanitizer (#180).


Version 2.6
===========

Released 2014-02-11

* Security:

  - CVE-2013-6401: The hash function used by the hashtable
    implementation has been changed, and is automatically seeded with
    random data when the first JSON object is created. This prevents
    an attacker from causing large JSON objects with specially crafted
    keys perform poorly.

* New features:

  - `json_object_seed()`: Set the seed value of the hash function.

* Bug fixes:

  - Include CMake specific files in the release tarball.

* Documentation:

  - Fix tutorial source to send a User-Agent header, which is now
    required by the GitHub API.

  - Set all memory to zero in secure_free() example.


Version 2.5
===========

Released 2013-09-19

* New features:

  - `json_pack()` and friends: Add format specifiers ``s#``, ``+`` and
    ``+#``.

  - Add ``JSON_DECODE_INT_AS_REAL`` decoding flag to treat all numbers
    as real in the decoder (#123).

  - Add `json_array_foreach()`, paralleling `json_object_foreach()`
    (#118).

* Bug fixes:

  - `json_dumps()` and friends: Don't crash if json is *NULL* and
    ``JSON_ENCODE_ANY`` is set.

  - Fix a theoretical integer overflow in `jsonp_strdup()`.

  - Fix `l_isxdigit()` macro (#97).

  - Fix an off-by-one error in `json_array_remove()`.

* Build:

  - Support CMake in addition to GNU Autotools (#106, #107, #112,
    #115, #120, #127).

  - Support building for Android (#109).

  - Don't use ``-Werror`` by default.

  - Support building and testing with VPATH (#93).

  - Fix compilation when ``NDEBUG`` is defined (#128)

* Tests:

  - Fix a refleak in ``test/bin/json_process.c``.

* Documentation:

  - Clarify the return value of `json_load_callback_t`.

  - Document how to circumvent problems with separate heaps on Windows.

  - Fix memory leaks and warnings in ``github_commits.c``.

  - Use `json_decref()` properly in tutorial.

* Other:

  - Make it possible to forward declare ``struct json_t``.


Version 2.4
===========

Released 2012-09-23

* New features:

  - Add `json_boolean()` macro that returns the JSON true or false
    value based on its argument (#86).

  - Add `json_load_callback()` that calls a callback function
    repeatedly to read the JSON input (#57).

  - Add JSON_ESCAPE_SLASH encoding flag to escape all occurences of
    ``/`` with ``\/``.

* Bug fixes:

  - Check for and reject NaN and Inf values for reals. Encoding these
    values resulted in invalid JSON.

  - Fix `json_real_set()` to return -1 on error.

* Build:

  - Jansson now builds on Windows with Visual Studio 2010, and
    includes solution and project files in ``win32/vs2010/``
    directory.

  - Fix build warnings (#77, #78).

  - Add ``-no-undefined`` to LDFLAGS (#90).

* Tests:

  - Fix the symbol exports test on Linux/PPC64 (#88).

* Documentation:

  - Fix typos (#73, #84).


Version 2.3.1
=============

Released 2012-04-20

* Build issues:

  - Only use ``long long`` if ``strtoll()`` is also available.

* Documentation:

  - Fix the names of library version constants in documentation. (#52)

  - Change the tutorial to use GitHub API v3. (#65)

* Tests:

  - Make some tests locale independent. (#51)

  - Distribute the library exports test in the tarball.

  - Make test run on shells that don't support the ``export FOO=bar``
    syntax.


Version 2.3
===========

Released 2012-01-27

* New features:

  - `json_unpack()` and friends: Add support for optional object keys
    with the ``{s?o}`` syntax.

  - Add `json_object_update_existing()` and
    `json_object_update_missing()`, for updating only existing keys or
    only adding missing keys to an object. (#37)

  - Add `json_object_foreach()` for more convenient iteration over
    objects. (#45, #46)

  - When decoding JSON, write the number of bytes that were read from
    input to ``error.position`` also on success. This is handy with
    ``JSON_DISABLE_EOF_CHECK``.

  - Add support for decoding any JSON value, not just arrays or
    objects. The support is enabled with the new ``JSON_DECODE_ANY``
    flag. Patch by Andrea Marchesini. (#4)

* Bug fixes

  - Avoid problems with object's serial number growing too big. (#40,
    #41)

  - Decoding functions now return NULL if the first argument is NULL.
    Patch by Andrea Marchesini.

  - Include ``jansson_config.h.win32`` in the distribution tarball.

  - Remove ``+`` and leading zeros from exponents in the encoder.
    (#39)

  - Make Jansson build and work on MinGW. (#39, #38)

* Documentation

  - Note that the same JSON values must not be encoded in parallel by
    separate threads. (#42)

  - Document MinGW support.


Version 2.2.1
=============

Released 2011-10-06

* Bug fixes:

  - Fix real number encoding and decoding under non-C locales. (#32)

  - Fix identifier decoding under non-UTF-8 locales. (#35)

  - `json_load_file()`: Open the input file in binary mode for maximum
    compatiblity.

* Documentation:

  - Clarify the lifecycle of the result of the ``s`` fromat of
    `json_unpack()`. (#31)

  - Add some portability info. (#36)

  - Little clarifications here and there.

* Other:

  - Some style fixes, issues detected by static analyzers.


Version 2.2
===========

Released 2011-09-03

* New features:

  - `json_dump_callback()`: Pass the encoder output to a callback
    function in chunks.

* Bug fixes:

  - `json_string_set()`: Check that target is a string and value is
    not NULL.

* Other:

  - Documentation typo fixes and clarifications.


Version 2.1
===========

Released 2011-06-10

* New features:

  - `json_loadb()`: Decode a string with a given size, useful if the
    string is not null terminated.

  - Add ``JSON_ENCODE_ANY`` encoding flag to allow encoding any JSON
    value. By default, only arrays and objects can be encoded. (#19)

  - Add ``JSON_REJECT_DUPLICATES`` decoding flag to issue a decoding
    error if any JSON object in the input contins duplicate keys. (#3)

  - Add ``JSON_DISABLE_EOF_CHECK`` decoding flag to stop decoding after a
    valid JSON input. This allows other data after the JSON data.

* Bug fixes:

  - Fix an additional memory leak when memory allocation fails in
    `json_object_set()` and friends.

  - Clear errno before calling `strtod()` for better portability. (#27)

* Building:

  - Avoid set-but-not-used warning/error in a test. (#20)

* Other:

  - Minor clarifications to documentation.


Version 2.0.1
=============

Released 2011-03-31

* Bug fixes:

  - Replace a few `malloc()` and `free()` calls with their
    counterparts that support custom memory management.

  - Fix object key hashing in json_unpack() strict checking mode.

  - Fix the parentheses in ``JANSSON_VERSION_HEX`` macro.

  - Fix `json_object_size()` return value.

  - Fix a few compilation issues.

* Portability:

  - Enhance portability of `va_copy()`.

  - Test framework portability enhancements.

* Documentation:

  - Distribute ``doc/upgrading.rst`` with the source tarball.

  - Build documentation in strict mode in ``make distcheck``.


Version 2.0
===========

Released 2011-02-28

This release is backwards incompatible with the 1.x release series.
See the chapter "Upgrading from older versions" in documentation for
details.

* Backwards incompatible changes:

  - Unify unsigned integer usage in the API: All occurences of
    unsigned int and unsigned long have been replaced with size_t.

  - Change JSON integer's underlying type to the widest signed integer
    type available, i.e. long long if it's supported, otherwise long.
    Add a typedef json_int_t that defines the type.

  - Change the maximum indentation depth to 31 spaces in encoder. This
    frees up bits from the flags parameter of encoding functions
    `json_dumpf()`, `json_dumps()` and `json_dump_file()`.

  - For future needs, add a flags parameter to all decoding functions
    `json_loadf()`, `json_loads()` and `json_load_file()`.

* New features

  - `json_pack()`, `json_pack_ex()`, `json_vpack_ex()`: Create JSON
    values based on a format string.

  - `json_unpack()`, `json_unpack_ex()`, `json_vunpack_ex()`: Simple
    value extraction and validation functionality based on a format
    string.

  - Add column, position and source fields to the ``json_error_t``
    struct.

  - Enhance error reporting in the decoder.

  - ``JANSSON_VERSION`` et al.: Preprocessor constants that define the
    library version.

  - `json_set_alloc_funcs()`: Set custom memory allocation functions.

* Fix many portability issues, especially on Windows.

* Configuration

  - Add file ``jansson_config.h`` that contains site specific
    configuration. It's created automatically by the configure script,
    or can be created by hand if the configure script cannot be used.
    The file ``jansson_config.h.win32`` can be used without
    modifications on Windows systems.

  - Add a section to documentation describing how to build Jansson on
    Windows.

  - Documentation now requires Sphinx 1.0 or newer.


Version 1.3
===========

Released 2010-06-13

* New functions:

  - `json_object_iter_set()`, `json_object_iter_set_new()`: Change
    object contents while iterating over it.

  - `json_object_iter_at()`: Return an iterator that points to a
    specific object item.

* New encoding flags:

  - ``JSON_PRESERVE_ORDER``: Preserve the insertion order of object
    keys.

* Bug fixes:

  - Fix an error that occured when an array or object was first
    encoded as empty, then populated with some data, and then
    re-encoded

  - Fix the situation like above, but when the first encoding resulted
    in an error

* Documentation:

  - Clarify the documentation on reference stealing, providing an
    example usage pattern


Version 1.2.1
=============

Released 2010-04-03

* Bug fixes:

  - Fix reference counting on ``true``, ``false`` and ``null``
  - Estimate real number underflows in decoder with 0.0 instead of
    issuing an error

* Portability:

  - Make ``int32_t`` available on all systems
  - Support compilers that don't have the ``inline`` keyword
  - Require Autoconf 2.60 (for ``int32_t``)

* Tests:

  - Print test names correctly when ``VERBOSE=1``
  - ``test/suites/api``: Fail when a test fails
  - Enhance tests for iterators
  - Enhance tests for decoding texts that contain null bytes

* Documentation:

  - Don't remove ``changes.rst`` in ``make clean``
  - Add a chapter on RFC conformance


Version 1.2
===========

Released 2010-01-21

* New functions:

  - `json_equal()`: Test whether two JSON values are equal
  - `json_copy()` and `json_deep_copy()`: Make shallow and deep copies
    of JSON values
  - Add a version of all functions taking a string argument that
    doesn't check for valid UTF-8: `json_string_nocheck()`,
    `json_string_set_nocheck()`, `json_object_set_nocheck()`,
    `json_object_set_new_nocheck()`

* New encoding flags:

  - ``JSON_SORT_KEYS``: Sort objects by key
  - ``JSON_ENSURE_ASCII``: Escape all non-ASCII Unicode characters
  - ``JSON_COMPACT``: Use a compact representation with all unneeded
    whitespace stripped

* Bug fixes:

  - Revise and unify whitespace usage in encoder: Add spaces between
    array and object items, never append newline to output.
  - Remove const qualifier from the ``json_t`` parameter in
    `json_string_set()`, `json_integer_set()` and `json_real_set`.
  - Use ``int32_t`` internally for representing Unicode code points
    (int is not enough on all platforms)

* Other changes:

  - Convert ``CHANGES`` (this file) to reStructured text and add it to
    HTML documentation
  - The test system has been refactored. Python is no longer required
    to run the tests.
  - Documentation can now be built by invoking ``make html``
  - Support for pkg-config


Version 1.1.3
=============

Released 2009-12-18

* Encode reals correctly, so that first encoding and then decoding a
  real always produces the same value
* Don't export private symbols in ``libjansson.so``


Version 1.1.2
=============

Released 2009-11-08

* Fix a bug where an error message was not produced if the input file
  could not be opened in `json_load_file()`
* Fix an assertion failure in decoder caused by a minus sign without a
  digit after it
* Remove an unneeded include of ``stdint.h`` in ``jansson.h``


Version 1.1.1
=============

Released 2009-10-26

* All documentation files were not distributed with v1.1; build
  documentation in make distcheck to prevent this in the future
* Fix v1.1 release date in ``CHANGES``


Version 1.1
===========

Released 2009-10-20

* API additions and improvements:

  - Extend array and object APIs
  - Add functions to modify integer, real and string values
  - Improve argument validation
  - Use unsigned int instead of ``uint32_t`` for encoding flags

* Enhance documentation

  - Add getting started guide and tutorial
  - Fix some typos
  - General clarifications and cleanup

* Check for integer and real overflows and underflows in decoder
* Make singleton values thread-safe (``true``, ``false`` and ``null``)
* Enhance circular reference handling
* Don't define ``-std=c99`` in ``AM_CFLAGS``
* Add C++ guards to ``jansson.h``
* Minor performance and portability improvements
* Expand test coverage


Version 1.0.4
=============

Released 2009-10-11

* Relax Autoconf version requirement to 2.59
* Make Jansson compile on platforms where plain ``char`` is unsigned
* Fix API tests for object


Version 1.0.3
=============

Released 2009-09-14

* Check for integer and real overflows and underflows in decoder
* Use the Python json module for tests, or simplejson if the json
  module is not found
* Distribute changelog (this file)


Version 1.0.2
=============

Released 2009-09-08

* Handle EOF correctly in decoder


Version 1.0.1
=============

Released 2009-09-04

* Fixed broken `json_is_boolean()`


Version 1.0
===========

Released 2009-08-25

* Initial release