初始版本

components/nfc/ndef/text/nfc_text_rec.c

@@ -0,0 +1,107 @@
+/**
+ * Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ *
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include "sdk_common.h"
+#if NRF_MODULE_ENABLED(NFC_NDEF_TEXT_RECORD)
+
+#include <string.h>
+#include "nfc_text_rec.h"
+#include "nrf_error.h"
+
+#define TEXT_REC_STATUS_SIZE          1     ///< Size of the status.
+#define TEXT_REC_STATUS_UTF_POS       7     ///< Position of a character encoding type.
+#define TEXT_REC_RESERVED_POS         6     ///< Reserved position.
+
+const uint8_t nfc_text_rec_type_field[] = {'T'};
+
+
+/**
+ * @brief Function for calculating payload size.
+ */
+__STATIC_INLINE uint32_t nfc_text_rec_payload_size_get(nfc_text_rec_payload_desc_t * p_nfc_rec_text_payload_desc)
+{
+    return (TEXT_REC_STATUS_SIZE
+          + p_nfc_rec_text_payload_desc->lang_code_len
+          + p_nfc_rec_text_payload_desc->data_len);
+}
+
+ret_code_t nfc_text_rec_payload_constructor(nfc_text_rec_payload_desc_t * p_nfc_rec_text_payload_desc,
+                                            uint8_t                     * p_buff,
+                                            uint32_t                    * p_len)
+{
+    if ((p_nfc_rec_text_payload_desc->lang_code_len == 0)
+     || (p_nfc_rec_text_payload_desc->lang_code_len & (1 << TEXT_REC_RESERVED_POS))
+     || (p_nfc_rec_text_payload_desc->lang_code_len & (1 << TEXT_REC_STATUS_UTF_POS))
+     || (p_nfc_rec_text_payload_desc->p_lang_code   == NULL)
+     || (p_nfc_rec_text_payload_desc->data_len      == 0)
+     || (p_nfc_rec_text_payload_desc->p_data        == NULL)
+     || (p_len                                      == NULL))
+    {
+        return NRF_ERROR_INVALID_PARAM;
+    }
+
+    uint32_t payload_size = nfc_text_rec_payload_size_get(p_nfc_rec_text_payload_desc);
+
+    if (p_buff != NULL)
+    {
+        if (payload_size > *p_len)
+        {
+            return NRF_ERROR_NO_MEM;
+        }
+
+        *p_buff = (p_nfc_rec_text_payload_desc->lang_code_len
+                + (p_nfc_rec_text_payload_desc->utf << TEXT_REC_STATUS_UTF_POS));
+        p_buff += TEXT_REC_STATUS_SIZE;
+
+        memcpy(p_buff,
+            p_nfc_rec_text_payload_desc->p_lang_code,
+            p_nfc_rec_text_payload_desc->lang_code_len);
+        p_buff += p_nfc_rec_text_payload_desc->lang_code_len;
+
+        memcpy(p_buff,
+            p_nfc_rec_text_payload_desc->p_data,
+            p_nfc_rec_text_payload_desc->data_len);
+    }
+
+    *p_len = payload_size;
+
+    return NRF_SUCCESS;
+}
+
+#endif // NRF_MODULE_ENABLED(NFC_NDEF_TEXT_RECORD)