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ChangeLog 0000644 00000037747 15170401725 0006342 0 ustar 00
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 failue 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 effecient 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 foward 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
README 0000644 00000000035 15170401725 0005424 0 ustar 00 See README.md or README.html
README.html 0000644 00000003501 15170401725 0006370 0 ustar 00 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>JSON-C - A JSON implementation in C</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<h2>JSON-C - A JSON implementation in C</h2>
<h3>Overview</h3>
<p>JSON-C implements a reference counting object model that allows you to easily
construct JSON objects in C, output them as JSON formatted strings and parse
JSON formatted strings back into the C representation of JSON objects.
It aims to conform to <a href="https://tools.ietf.org/html/rfc7159">RFC 7159</a>.
</p>
<h3>Building</h3>
<p>To setup JSON-C to build on your system please run <tt>configure</tt> and <tt>make</tt>.</p>
<p>If you are on Win32 cmake is required, generally:</p>
<ul>
<li>mkdir build</li>
<li>cd build</li>
<li>cmake ..</li>
<li>msbuild "json-c.vcxproj" /m /verbosity:normal /p:OutDir=lib\</li>
<li>Or, open the project in Visual Studio</li>
</ul>
<h3>Documentation</h3>
<P>Doxygen generated documentation exists <a href="doc/html/json__object_8h.html">here</a>
and Win32 specific notes can be found <a href="README-WIN32.html">here</a>.</P>
<h3><a href="https://github.com/json-c/json-c">GIT Reposository</a></h3>
<p><strong><code>git clone https://github.com/json-c/json-c.git</code></strong></p>
<h3><a href="http://groups.google.com/group/json-c">Mailing List</a></h3>
<pi>Send email to <strong><code>json-c <i><at></i> googlegroups <i><dot></i> com</code></strong></p>
<h3><a href="COPYING">License</a></h3>
<p>This program is free software; you can redistribute it and/or modify it under the terms of the MIT License.</p>
<hr/>
</body>
</html>
README.md 0000644 00000012123 15170401725 0006024 0 ustar 00 `json-c` {#mainpage}
========
1. [Overview and Build Status](#overview)
2. [Building on Unix](#buildunix)
3. [Install Prerequisites](#installprereq)
4. [Building with partial threading support](#buildthreaded)
5. [Linking to libjson-c](#linking)
6. [Using json-c](#using)
JSON-C - A JSON implementation in C <a name="overview"></a>
-----------------------------------
Build Status
* [AppVeyor Build](https://ci.appveyor.com/project/hawicz/json-c) 
* [Travis Build](https://travis-ci.org/json-c/json-c) 
JSON-C implements a reference counting object model that allows you to easily
construct JSON objects in C, output them as JSON formatted strings and parse
JSON formatted strings back into the C representation of JSON objects.
It aims to conform to [RFC 7159](https://tools.ietf.org/html/rfc7159).
Building on Unix with `git`, `gcc` and `autotools` <a name="buildunix"></a>
--------------------------------------------------
Home page for json-c: https://github.com/json-c/json-c/wiki
### Prerequisites:
See also the "Installing prerequisites" section below.
- `gcc`, `clang`, or another C compiler
- `libtool>=2.2.6b`
If you're not using a release tarball, you'll also need:
- `autoconf>=2.64` (`autoreconf`)
- `automake>=1.13`
Make sure you have a complete `libtool` install, including `libtoolize`.
To generate docs (e.g. as part of make distcheck) you'll also need:
- `doxygen>=1.8.13`
### Build instructions:
`json-c` GitHub repo: https://github.com/json-c/json-c
```sh
$ git clone https://github.com/json-c/json-c.git
$ cd json-c
$ sh autogen.sh
```
followed by
```sh
$ ./configure # --enable-threading
$ make
$ make install
```
To build and run the test programs:
```sh
$ make check
$ make USE_VALGRIND=0 check # optionally skip using valgrind
```
Install prerequisites <a name="installprereq"></a>
-----------------------
If you are on a relatively modern system, you'll likely be able to install
the prerequisites using your OS's packaging system.
### Install using apt (e.g. Ubuntu 16.04.2 LTS)
```sh
sudo apt install git
sudo apt install autoconf automake libtool
sudo apt install valgrind # optional
```
Then start from the "git clone" command, above.
### Manually install and build autoconf, automake and libtool
For older OS's that don't have up-to-date version of the packages will
require a bit more work. For example, CentOS release 5.11, etc...
```sh
curl -O http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz
curl -O http://ftp.gnu.org/gnu/automake/automake-1.15.tar.gz
curl -O http://ftp.gnu.org/gnu/libtool/libtool-2.2.6b.tar.gz
tar xzf autoconf-2.69.tar.gz
tar xzf automake-1.15.tar.gz
tar xzf libtool-2.2.6b.tar.gz
export PATH=${HOME}/ac_install/bin:$PATH
(cd autoconf-2.69 && \
./configure --prefix ${HOME}/ac_install && \
make && \
make install)
(cd automake-1.15 && \
./configure --prefix ${HOME}/ac_install && \
make && \
make install)
(cd libtool-2.2.6b && \
./configure --prefix ${HOME}/ac_install && \
make && \
make install)
```
Building with partial threading support <a name="buildthreaded"></a>
----------------------------------------
Although json-c does not support fully multi-threaded access to
object trees, it has some code to help make use in threaded programs
a bit safer. Currently, this is limited to using atomic operations for
json_object_get() and json_object_put().
Since this may have a performance impact, of at least 3x slower
according to https://stackoverflow.com/a/11609063, it is disabled by
default. You may turn it on by adjusting your configure command with:
--enable-threading
Separately, the default hash function used for object field keys,
lh_char_hash, uses a compare-and-swap operation to ensure the randomly
seed is only generated once. Because this is a one-time operation, it
is always compiled in when the compare-and-swap operation is available.
Linking to `libjson-c` <a name="linking">
----------------------
If your system has `pkgconfig`,
then you can just add this to your `makefile`:
```make
CFLAGS += $(shell pkg-config --cflags json-c)
LDFLAGS += $(shell pkg-config --libs json-c)
```
Without `pkgconfig`, you would do something like this:
```make
JSON_C_DIR=/path/to/json_c/install
CFLAGS += -I$(JSON_C_DIR)/include/json-c
LDFLAGS+= -L$(JSON_C_DIR)/lib -ljson-c
```
Using json-c <a name="using">
------------
To use json-c you can either include json.h, or preferrably, one of the
following more specific header files:
* json_object.h - Core types and methods.
* json_tokener.h - Methods for parsing and serializing json-c object trees.
* json_pointer.h - JSON Pointer (RFC 6901) implementation for retrieving
objects from a json-c object tree.
* json_object_iterator.h - Methods for iterating over single json_object instances.
* json_visit.h - Methods for walking a tree of json-c objects.
* json_util.h - Miscelleanous utility functions.
For a full list of headers see [files.html](files.html)