Mailing List Archive

This function converts a libxl__json_object to yajl by calling every
yajl_gen_* function on a preallocated yajl_gen hand.

This helps to integrate a json_object into an already existing
yajl_gen tree.

This function is used in a later patch.

Backported from xen-unstable patch:
: HG changeset patch
: User Anthony PERARD <anthony.perard@citrix.com>
: Date 1349693132 -3600
: Node ID 74dee58cfc0d2d6594f388db3b4d2ce91d1bb204
: Parent 3f71aab0e2774ded0c5a03436c364fb031ba9aa0
---
tools/libxl/libxl_internal.h | 3 ++
tools/libxl/libxl_json.c | 61 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 7dbd8af..b00ff61 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1539,6 +1539,9 @@ libxl__json_map_node *libxl__json_map_node_get(const libxl__json_object *o,
_hidden const libxl__json_object *libxl__json_map_get(const char *key,
const libxl__json_object *o,
libxl__json_node_type expected_type);
+_hidden yajl_status libxl__json_object_to_yajl_gen(libxl__gc *gc_opt,
+ yajl_gen hand,
+ libxl__json_object *param);
_hidden void libxl__json_object_free(libxl__gc *gc_opt,
libxl__json_object *obj);

diff --git a/tools/libxl/libxl_json.c b/tools/libxl/libxl_json.c
index 98db465..72b52e8 100644
--- a/tools/libxl/libxl_json.c
+++ b/tools/libxl/libxl_json.c
@@ -381,6 +381,67 @@ const libxl__json_object *libxl__json_map_get(const char *key,
return NULL;
}

+yajl_status libxl__json_object_to_yajl_gen(libxl__gc *gc,
+ yajl_gen hand,
+ libxl__json_object *obj)
+{
+ int idx = 0;
+ yajl_status rc;
+
+ switch (obj->type) {
+ case JSON_NULL:
+ return yajl_gen_null(hand);
+ case JSON_BOOL:
+ return yajl_gen_bool(hand, obj->u.b);
+ case JSON_INTEGER:
+ return yajl_gen_integer(hand, obj->u.i);
+ case JSON_DOUBLE:
+ return yajl_gen_double(hand, obj->u.d);
+ case JSON_NUMBER:
+ return yajl_gen_number(hand, obj->u.string, strlen(obj->u.string));
+ case JSON_STRING:
+ return libxl__yajl_gen_asciiz(hand, obj->u.string);
+ case JSON_MAP: {
+ libxl__json_map_node *node = NULL;
+
+ rc = yajl_gen_map_open(hand);
+ if (rc != yajl_status_ok)
+ return rc;
+ for (idx = 0; idx < obj->u.map->count; idx++) {
+ if (flexarray_get(obj->u.map, idx, (void**)&node) != 0)
+ break;
+
+ rc = libxl__yajl_gen_asciiz(hand, node->map_key);
+ if (rc != yajl_status_ok)
+ return rc;
+ rc = libxl__json_object_to_yajl_gen(gc, hand, node->obj);
+ if (rc != yajl_status_ok)
+ return rc;
+ }
+ return yajl_gen_map_close(hand);
+ }
+ case JSON_ARRAY: {
+ libxl__json_object *node = NULL;
+
+ rc = yajl_gen_array_open(hand);
+ if (rc != yajl_status_ok)
+ return rc;
+ for (idx = 0; idx < obj->u.array->count; idx++) {
+ if (flexarray_get(obj->u.array, idx, (void**)&node) != 0)
+ break;
+ rc = libxl__json_object_to_yajl_gen(gc, hand, node);
+ if (rc != yajl_status_ok)
+ return rc;
+ }
+ return yajl_gen_array_close(hand);
+ }
+ case JSON_ANY:
+ /* JSON_ANY is not a valid value for obj->type. */
+ ;
+ }
+ abort();
+}
+

/*
* JSON callbacks
--
1.7.4.1


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel