Protocol: new functions and associated docs.

The header declares new functions:

	* tlv_init()
	* tlv_destroy()
	* tlv_push()
	* tlv_get_raw()
	* tlv_raw_size()

Signed-off-by: Ramūnas Mažeikis <ramunasnezinomas@gmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/common/protocol.c b/src/common/protocol.c
index b2e0d40..edaf491 100644
--- a/src/common/protocol.c
+++ b/src/common/protocol.c
@@ -131,3 +131,35 @@ size_t tlv_data_size(struct tlv_parser *parser)
 	}
 	return size;
 }
+
+void tlv_destroy(struct tlv *t)
+{
+	free(t->data);
+	t->length = 0;
+}
+
+size_t tlv_raw_size(struct tlv *t)
+{
+	return sizeof(*t) + t->length;
+}
+
+int tlv_push(struct tlv *t, const char *data, size_t size)
+{
+	int ret = 0;
+	size_t final_size = tlv_raw_size(t) + size;
+	if (final_size > TLV_SZ_MAX_RAW) {
+		ret = E_TLV_OVERFLOW;
+	} else {
+		t->data = realloc(t->data, final_size);
+		memcpy(t->data + t->length, data, size);
+		t->length = final_size;
+	}
+	return ret;
+}
+
+void tlv_init(struct tlv *t)
+{
+	t->type = TEXT;
+	t->length = 0;
+	t->data = NULL;
+}
\ No newline at end of file