copy project from century 2in6 esl project

COMPONENTS/serialization/common/cond_field_serialization.h

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+/**
+ * Copyright (c) 2014 - 2017, 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.
+ * 
+ */
+
+#ifndef COND_FIELD_SERIALIZATION_H__
+#define COND_FIELD_SERIALIZATION_H__
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint32_t (*field_encoder_handler_t)(void const * const p_field,
+                                            uint8_t * const    p_buf,
+                                            uint32_t           buf_len,
+                                            uint32_t * const   p_index);
+
+typedef uint32_t (*field_decoder_handler_t)(uint8_t const * const p_buf,
+                                            uint32_t              buf_len,
+                                            uint32_t * const      p_index,
+                                            void *                p_field);
+
+/**@brief Function for safe encoding of a conditional field.
+ *
+ * Function sets a presence flag and checks if conditional field is provided. If the field is not NULL,
+ * it calls the provided parser function which attempts to encode the field content to the buffer stream.
+ *
+ * @param[in]      p_field          Pointer to the input struct.
+ * @param[in]      p_buf            Pointer to the beginning of the output buffer.
+ * @param[in]      buf_len          Size of the buffer.
+ * @param[in,out]  p_index          \c in: Index to the start of the uint8 value in the buffer.
+ *                                  \c out: Index in the buffer to the first byte after the encoded data.
+ * @param[in]      fp_field_encoder Pointer to the function which implements fields encoding.
+ *
+ * @return NRF_SUCCESS              Fields encoded successfully.
+ * @retval NRF_ERROR_INVALID_LENGTH Decoding failure. Incorrect buffer length.
+ */
+uint32_t cond_field_enc(void const * const      p_field,
+                        uint8_t * const         p_buf,
+                        uint32_t                buf_len,
+                        uint32_t * const        p_index,
+                        field_encoder_handler_t fp_field_encoder);
+
+/**@brief Function for safe decoding of a conditional field.
+ *
+ * Function checks if conditional field is present in the input buffer. If it is set, it calls
+ * the provided parser function which attempts to parse the buffer content to the known field.
+ *
+ * @param[in]      p_buf            Pointer to the beginning of the input buffer.
+ * @param[in]      buf_len          Size of the buffer.
+ * @param[in,out]  p_index          \c in: Index to the start of the uint8 value in the buffer.
+ *                                  \c out: Index in the buffer to the first byte after the decoded data.
+ * @param[in]      pp_field         Pointer to output location.
+ * @param[in]      fp_field_decoder Pointer to the function which implements field decoding.
+ *
+ * @return NRF_SUCCESS              Fields decoded successfully.
+ * @retval NRF_ERROR_INVALID_LENGTH Decoding failure. Incorrect buffer length.
+ */
+uint32_t cond_field_dec(uint8_t const * const   p_buf,
+                        uint32_t                buf_len,
+                        uint32_t * const        p_index,
+                        void * * const          pp_field,
+                        field_decoder_handler_t fp_field_decoder);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // COND_FIELD_SERIALIZATION_H__