[libvirt] [PATCH v2 2/9] util: add functions for interating over json object
Add function virJSONValueObjectKeysNumber, virJSONValueObjectGetKey
and virJSONValueObjectGetValue, which allow you to iterate over all
fields of json object: you can get number of fields and then get
name and value, stored in field with that name by index.
Signed-off-by: Dmitry Guryanov <dguryanov(a)parallels.com>
---
src/util/json.c | 30 ++++++++++++++++++++++++++++++
src/util/json.h | 4 ++++
2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/src/util/json.c b/src/util/json.c
index 3258c3f..e7dc272 100644
--- a/src/util/json.c
+++ b/src/util/json.c
@@ -431,6 +431,36 @@ virJSONValuePtr virJSONValueObjectGet(virJSONValuePtr object, const
char *key)
return NULL;
}
+int virJSONValueObjectKeysNumber(virJSONValuePtr object)
+{
+ if (object->type != VIR_JSON_TYPE_OBJECT)
+ return -1;
+
+ return object->data.object.npairs;
+}
+
+const char *virJSONValueObjectGetKey(virJSONValuePtr object, unsigned int n)
+{
+ if (object->type != VIR_JSON_TYPE_OBJECT)
+ return NULL;
+
+ if (n >= object->data.object.npairs)
+ return NULL;
+
+ return object->data.object.pairs[n].key;
+}
+
+virJSONValuePtr virJSONValueObjectGetValue(virJSONValuePtr object, unsigned int n)
+{
+ if (object->type != VIR_JSON_TYPE_OBJECT)
+ return NULL;
+
+ if (n >= object->data.object.npairs)
+ return NULL;
+
+ return object->data.object.pairs[n].value;
+}
+
int virJSONValueArraySize(virJSONValuePtr array)
{
if (array->type != VIR_JSON_TYPE_ARRAY)
diff --git a/src/util/json.h b/src/util/json.h
index 686a8fb..436405f 100644
--- a/src/util/json.h
+++ b/src/util/json.h
@@ -100,6 +100,10 @@ virJSONValuePtr virJSONValueObjectGet(virJSONValuePtr object, const
char *key);
int virJSONValueArraySize(virJSONValuePtr object);
virJSONValuePtr virJSONValueArrayGet(virJSONValuePtr object, unsigned int element);
+int virJSONValueObjectKeysNumber(virJSONValuePtr object);
+const char *virJSONValueObjectGetKey(virJSONValuePtr object, unsigned int n);
+virJSONValuePtr virJSONValueObjectGetValue(virJSONValuePtr object, unsigned int n);
+
const char *virJSONValueGetString(virJSONValuePtr object);
int virJSONValueGetNumberInt(virJSONValuePtr object, int *value);
int virJSONValueGetNumberUint(virJSONValuePtr object, unsigned int *value);
--
1.7.1