Simple data buffer splitter and re-assembler.
Diff: DataFragmenterAssembler.h
- Revision:
- 1:9f05dbd1c2c7
- Parent:
- 0:12a931a6161c
- Child:
- 2:5614523d641b
--- a/DataFragmenterAssembler.h Thu Feb 12 20:00:36 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,85 +0,0 @@ -/** - * @file DataFragmenterAssembler.h - * @brief data fragmenter and assembler (for BLE UARTService...) header - * @author Doug Anson - * @version 1.0 - * @see - * - * Copyright (c) 2014 - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef __DATA_FRAGMENTER_ASSEMBLER_H__ -#define __DATA_FRAGMENTER_ASSEMBLER_H__ - -#include "mbed.h" - -// TUNABLES -#define MAX_FRAGMENTS 100 // maximum number of supported fragments... increase as needed... -#define DEF_FRAGMENT_LENGTH 20 // Typically identical to BLE_UART_SERVICE_MAX_DATA_LEN in UARTService.h - -class DataFragmenterAssembler { - public: - /** - Constructor - */ - DataFragmenterAssembler(); - - /** - Fragment a data stream into "n" fragments of the given input fragement (from constructor) size - @param data input input data buffer - @param data_length input input data buffer length - @returns number of fragments created for the input buffer - */ - int fragment(uint8_t *data,int data_length); - - /** - Get the ith fragment - @param index input the ith index value - @return the ith fragment pointer (null terminated) - */ - uint8_t *get(int index); - - /** - Reset the Fragmenter/Assembler - */ - void reset(void); - - /** - Add a fragment - @param fragment input fragment to add - @param fragment_length input the input fragment length (sanity checks...) - @return the number of fragments currently stored - */ - int add(uint8_t *fragment,int fragment_length); - - /** - Assemble fragments - @param buffer input the result buffer - @param buffer_length input the result buffer length (maximum) - @param reset_after_assemble input reset the Fragmenter/Assembler after assembly is complete (default: TRUE) - */ - void assemble(uint8_t *buffer,int buffer_length,bool reset_after_assemble = true); - - private: - int calculateNumFragments(uint8_t *data,int data_length); - int calculateAssemblyLength(int buffer_length); - void dump(void); - - int m_num_fragments; - int m_last_fragment_length; - uint8_t m_fragments[DEF_FRAGMENT_LENGTH+1][MAX_FRAGMENTS]; -}; - -#endif // __DATA_FRAGMENTER_ASSEMBLER_H__ \ No newline at end of file