Re: [libvirt] [PATCH v6 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&gt; --- 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);