[PATCH V3 00/13] JSON infrastructure and new "xl-json" format

[Wei Liu <wei.liu2@citrix.com>]

This series contains my original patches to add in JSON parser and a new patch
to add "xl-json" format. The last patch makes use of JSON parser.

The first few patches are bug fix, documentation improvement and prerequisit
code movement.

For the JSON parser (taken from my earlier email):

Libxl introduced JSON infrastructure to communicate with upstream QEMU. The
ability of exisiting JSON infrastructure is to convert libxl_FOO struct to
libxl JSON object and parse JSON object (string) returned by QEMU.

This series makes libxl able to convert a JSON string to libxl_FOO struct.
The conversion is done in two macro steps:
 1. convert JSON string to libxl JSON object (libxl__json_object)
 2. convert libxl JSON object to libxl_FOO struct

The first stage is done with existing infrastructure. This series focuses on
the second stage.

Now we have the ability to do the following transformation:
  libxl_FOO struct -> libxl_FOO JSON object -> libxl JSON internal object ->
  libxl_FOO struct

This full cycle can be used to preserved runtime configurations of a domain.

Last patch makes use of the new parser and introduces "xl-json" format. Please
refer to commit log for details. Currently it's restricted to internal use
only, that is, user is not allowed to supply a config file in JSON format.

Wei.

Changes in V3:
* remove libxl__integer_parse_json and add functions for specific
  integer types
* relax some checkings on invalid inputs
* libxl__json_parse_callback now takes gc instead of ctx
* rewrite "allow basic JSON type objects generation"
* ... and address some other misc things mentioned by IanC

Changes in V2:
* address IanC's comments on JSON parser
* add "xl-json" format patch

Wei Liu (13):
  libxl: fix memory leak in libxl_cpuid_dispose
  libxl.h: document the paradigm of using libxl types
  libxl.h: move / add some libxl defbool #define here
  libxl IDL: rename json_fn to json_gen_fn
  libxl_json: introduce libx__object_from_json
  libxl_internal: make JSON_* types a bit-field
  libxl_internal: introduce libxl__json_object_is_{null,number,double}
  libxl_json: introduce parser functions for builtin types
  libxl_json: allow basic JSON type objects generation
  libxl/gentypes.py: include discriminator in JSON output
  libxl IDL: generate code to parse libxl__json_object to libxl_FOO
    struct
  libxl/gentest.py: test JSON parser
  xl: introduce "xl-json" format

 docs/man/xl.cfg.pod.5                |    3 +-
 tools/libxl/gentest.py               |   27 ++-
 tools/libxl/gentypes.py              |  131 +++++++++++-
 tools/libxl/idl.py                   |   25 ++-
 tools/libxl/idl.txt                  |    9 +-
 tools/libxl/libxl.c                  |   10 +-
 tools/libxl/libxl.h                  |   12 ++
 tools/libxl/libxl_cpuid.c            |   93 +++++++--
 tools/libxl/libxl_internal.h         |   40 +++-
 tools/libxl/libxl_json.c             |  364 +++++++++++++++++++++++++++++-----
 tools/libxl/libxl_json.h             |   36 +++-
 tools/libxl/libxl_nocpuid.c          |    7 +
 tools/libxl/libxl_types.idl          |   31 +--
 tools/libxl/libxl_types_internal.idl |    4 +-
 tools/libxl/xl_cmdimpl.c             |  112 ++++++++---
 15 files changed, 763 insertions(+), 141 deletions(-)

-- 
1.7.10.4