Conflicts:
	tests/test_util_file.c

Adding a test with cppcheck for Travis CI

Improving README

Improving .gitignore

The test is implied in test1.

The idea is to check that the returned lengths and strings
are identical to what is expected to return the already
tested function 'json_object_to_json_string_ext'.

Signed-off-by: José Bollo <jose.bollo@iot.bzh>

Also, be sure the right locale_t is freed if we fail on the second uselocale.
Finally, fix test_locale so it *doesn't* use json_object_to_json_string as
 that will simple re-emit the original parsed string values.

This new method allows to also
get the length of the generated string.

Fix #165

Change-Id: Iea91404027f143ca3d29a4c58d7c07ae53556110
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

The function fstat isn't declared without this include
on debian strect/sid and Fedora-23

Change-Id: I660a32ff173dcba04674aed51ed855b4fa55ac67
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

initialize null terminator of new printbuf

It's possible (e.g. by using json_object_from_file() on an empty file)
to get json-c to try to use a printbuf that has never had anything
written to it. Before this change, it could access a string that
should be length zero, but was never initialized, and could
theoretically have an unexpected string.

Fix issues with the test script so it works under distcheck too.

linkhash.c: optimised the table_free path

Add tests and descriptions for the functions in json_util.c

To better distinguish between entry->k and entry->v being const within linkhash, but non-const outside, add lh_entry_v() and lh_entry_k() accessors.
Make lh_entry->k const.

Cause README.md to show up in Doxygen output as the main page.

tests/tests1: fix printf format for size_t arguments

Change %d to %llu and add cast to unsigned long long for size_t arguments,
otherwise compilation will fail with errors like:

test1.c:70:15: error: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘size_t {aka long unsigned int}’ [-Werror=format=]

%zu is avoided to stay compatible with old libc versions (like old Visual
Studio).

Also, fix the types of the variables when building on Windows.
Also, should address issue #214.

Use stdint.h to check for size_t size

Include stddef.h in json_object.h

Add public API to use userdata independently of custom serializer

svn.metaparadigm.com no longer exists so it is not possible to use source from there.

Also, json_object_set_serializer is changed to respect the userdata
and user_delete parameters when to_string_func is NULL.

The user might want to use the userdata for something different, so the
serializer should ignore it by default.

Explicitly setting the serializer to json_object_double_to_json_string will
still make it interpret the userdata as a format string.

It is needed for size_t.

If we use json_inttypes.h we are going to fail when builddir != srcdir,
and since JSON_C_HAVE_INTTYPES_H is defined after the configure script
has run, including json_inttypes.h would be the equivalent on including
stdint.h anyway.

This fixes the build of json-c in the GNOME Continuous builder.

Make serialization format of doubles configurable