libxl_json: Replace JSON_TRUE/FALSE by JSON_BOOL.

Those two JSON_TRUE and JSON_FALSE were types of node. But it's better
to have a unique JSON_BOOL type.

Backported from xen-unstable patch:
: HG changeset patch
: User Anthony PERARD <anthony.perard@citrix.com>
: Date 1349693131 -3600
: Node ID 3f71aab0e2774ded0c5a03436c364fb031ba9aa0
: Parent  4a6d5d8cba4fc44f9bbda201188885868604b8e8
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>

3 files changed, 16 insertions, 5 deletions

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 5b285d488b..7dbd8af2bf 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1429,8 +1429,7 @@ _hidden yajl_gen_status libxl__yajl_gen_enum(yajl_gen hand, const char *str);
 
 typedef enum {
     JSON_NULL,
-    JSON_TRUE,
-    JSON_FALSE,
+    JSON_BOOL,
     JSON_INTEGER,
     JSON_DOUBLE,
     /* number is store in string, it's too big to be a long long or a double */
@@ -1444,6 +1443,7 @@ typedef enum {
 typedef struct libxl__json_object {
     libxl__json_node_type type;
     union {
+        bool b;
         long long i;
         double d;
         char *string;
@@ -1462,6 +1462,10 @@ typedef struct {
 
 typedef struct libxl__yajl_ctx libxl__yajl_ctx;
 
+static inline bool libxl__json_object_is_bool(const libxl__json_object *o)
+{
+    return o != NULL && o->type == JSON_BOOL;
+}
 static inline bool libxl__json_object_is_string(const libxl__json_object *o)
 {
     return o != NULL && o->type == JSON_STRING;
@@ -1479,6 +1483,13 @@ static inline bool libxl__json_object_is_array(const libxl__json_object *o)
     return o != NULL && o->type == JSON_ARRAY;
 }
 
+static inline bool libxl__json_object_get_bool(const libxl__json_object *o)
+{
+    if (libxl__json_object_is_bool(o))
+        return o->u.b;
+    else
+        return false;
+}
 static inline
 const char *libxl__json_object_get_string(const libxl__json_object *o)
 {
diff --git a/tools/libxl/libxl_json.c b/tools/libxl/libxl_json.c
index 0b0cf2fc93..98db4657b9 100644
--- a/tools/libxl/libxl_json.c
+++ b/tools/libxl/libxl_json.c
@@ -411,8 +411,7 @@ static int json_callback_boolean(void *opaque, int boolean)
 
     DEBUG_GEN_VALUE(ctx, bool, boolean);
 
-    if ((obj = libxl__json_object_alloc(ctx->gc,
-                                 boolean ? JSON_TRUE : JSON_FALSE)) == NULL)
+    if ((obj = libxl__json_object_alloc(ctx->gc, JSON_BOOL)) == NULL)
         return 0;
 
     if (libxl__json_object_append_to(ctx->gc, obj, ctx->current) == -1) {
diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index e33b130f00..9e86c35cc5 100644
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -178,7 +178,8 @@ static int qmp_register_vnc_callback(libxl__qmp_handler *qmp,
         goto out;
     }
 
-    if (libxl__json_map_get("enabled", o, JSON_FALSE)) {
+    obj = libxl__json_map_get("enabled", o, JSON_BOOL);
+    if (!obj || !libxl__json_object_get_bool(obj)) {
         rc = 0;
         goto out;
     }