ndef: API provided to prepare smartposter ndef record

API provided to prepare smartposter ndef record with mandatory uri fields,
which is useful to write ndef data on tags.

diff --git a/include/ndef.h b/include/ndef.h
index 0cbe47b..6af47c9 100644 (file)
--- a/include/ndef.h
+++ b/include/ndef.h
@@ -40,4 +40,9 @@ struct near_ndef_message *near_ndef_prepare_text_record(char *encoding,
 struct near_ndef_message *near_ndef_prepare_uri_record(uint8_t identifier,
                                         uint32_t field_length, uint8_t *field);
 
+struct near_ndef_message *
+near_ndef_prepare_smartposter_record(uint8_t uri_identifier,
+                                       uint32_t uri_field_length,
+                                       uint8_t *uri_field);
+
 #endif

diff --git a/src/ndef.c b/src/ndef.c
index 6b04a75..160a95e 100644 (file)
--- a/src/ndef.c
+++ b/src/ndef.c
@@ -1436,6 +1436,70 @@ fail:
        return NULL;
 }
 
+/**
+ * @brief Prepare Smartposter ndef record with mandatory URI fields.
+ *
+ * Prepare smartposter ndef record with provided input data and
+ * return ndef message structure (length and byte stream) in success or
+ * NULL in failure case.
+ *
+ * @note : caller responsibility to free the input and output
+ *         parameters memory.
+ *
+ * @param[in] uri_identfier
+ * @param[in] uri_field_length
+ * @param[in] uri_field
+ *
+ * @return struct near_ndef_message * - Success
+ *         NULL - Failure
+ */
+struct near_ndef_message *
+near_ndef_prepare_smartposter_record(uint8_t uri_identifier,
+                                       uint32_t uri_field_length,
+                                       uint8_t *uri_field)
+{
+       struct near_ndef_message *msg = NULL, *uri = NULL;
+
+       /* URI is mandatory in Smartposter */
+       uri = near_ndef_prepare_uri_record(uri_identifier, uri_field_length,
+                                                               uri_field);
+       if (uri == NULL)
+               goto fail;
+
+       /* URI record length is equal to payload length of Sp record */
+       msg = ndef_message_alloc("Sp", uri->length);
+       if (msg == NULL)
+               goto fail;
+
+       memcpy(msg->data + msg->offset, uri->data, uri->length);
+       msg->offset += uri->length;
+
+       if (msg->offset > msg->length)
+               goto fail;
+
+       if (uri != NULL) {
+               g_free(uri->data);
+               g_free(uri);
+       }
+
+       return msg;
+
+fail:
+       near_error("smartposter record preparation failed");
+
+       if (uri != NULL) {
+               g_free(uri->data);
+               g_free(uri);
+       }
+
+       if (msg != NULL) {
+               g_free(msg->data);
+               g_free(msg);
+       }
+
+       return NULL;
+}
+
 int __near_ndef_init(void)
 {
        DBG("");