[LTP] [PATCH 4/9] metadata: data_storage: Add JSON null type

[Cyril Hrubis]

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 metadata/data_storage.h | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/metadata/data_storage.h b/metadata/data_storage.h
index 91ea70a02..e72be6187 100644
--- a/metadata/data_storage.h
+++ b/metadata/data_storage.h
@@ -16,6 +16,7 @@ enum data_type {
 	DATA_HASH,
 	DATA_STRING,
 	DATA_INT,
+	DATA_NULL,
 };
 
 struct data_node_array {
@@ -68,6 +69,8 @@ static inline const char* data_type_name(enum data_type type)
 		return "string";
 	case DATA_INT:
 		return "int";
+	case DATA_NULL:
+		return "null";
 	default:
 		return "???";
 	}
@@ -100,6 +103,18 @@ static inline struct data_node *data_node_int(long i)
 	return node;
 }
 
+static inline struct data_node *data_node_null(void)
+{
+	struct data_node *node = malloc(sizeof(struct data_node));
+
+	if (!node)
+		return NULL;
+
+	node->type = DATA_NULL;
+
+	return node;
+}
+
 #define MAX_ELEMS 100
 
 static inline struct data_node *data_node_hash(void)
@@ -159,6 +174,7 @@ static inline void data_node_free(struct data_node *self)
 	switch (self->type) {
 	case DATA_STRING:
 	case DATA_INT:
+	case DATA_NULL:
 	break;
 	case DATA_HASH:
 		for (i = 0; i < self->hash.elems_used; i++) {
@@ -254,6 +270,10 @@ static inline void data_node_print_(struct data_node *self, unsigned int padd)
 		data_print_padd(padd);
 		printf("'%s'\n", self->string.val);
 	break;
+	case DATA_NULL:
+		data_print_padd(padd);
+		printf("null\n");
+	break;
 	case DATA_HASH:
 		for (i = 0; i < self->hash.elems_used; i++) {
 			data_print_padd(padd);
@@ -297,7 +317,6 @@ static inline void data_fprintf(FILE *f, unsigned int padd, const char *fmt, ...
 	va_end(va);
 }
 
-
 static inline void data_fprintf_esc(FILE *f, unsigned int padd, const char *str)
 {
 	while (padd-- > 0)
@@ -344,6 +363,10 @@ static inline void data_to_json_(struct data_node *self, FILE *f, unsigned int p
 		padd = do_padd ? padd : 0;
 		data_fprintf_esc(f, padd, self->string.val);
 	break;
+	case DATA_NULL:
+		padd = do_padd ? padd : 0;
+		data_fprintf(f, padd, "null");
+	break;
 	case DATA_HASH:
 		for (i = 0; i < self->hash.elems_used; i++) {
 			data_fprintf(f, padd, "\"%s\": ", self->hash.elems[i].id);
-- 
2.45.2