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| Rev | Author | Line No. | Line |
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| 1702 | - | 1 | /* Copyright (C) 2010-2011 Circuits At Home, LTD. All rights reserved. |
| 2 | |||
| 3 | This software may be distributed and modified under the terms of the GNU |
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| 4 | General Public License version 2 (GPL2) as published by the Free Software |
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| 5 | Foundation and appearing in the file GPL2.TXT included in the packaging of |
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| 6 | this file. Please note that GPL2 Section 2[b] requires that all works based |
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| 7 | on this software must also be made publicly available under the terms of |
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| 8 | the GPL2 ("Copyleft"). |
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| 9 | |||
| 10 | Contact information |
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| 11 | ------------------- |
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| 12 | |||
| 13 | Circuits At Home, LTD |
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| 14 | Web : http://www.circuitsathome.com |
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| 15 | e-mail : support@circuitsathome.com |
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| 16 | */ |
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| 17 | #ifndef __PTPCALLBACK_H__ |
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| 18 | #define __PTPCALLBACK_H__ |
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| 19 | |||
| 20 | #include <inttypes.h> |
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| 21 | #include <avr/pgmspace.h> |
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| 22 | #include "WProgram.h" |
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| 23 | |||
| 24 | // Base class for incomming data parser |
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| 25 | class PTPReadParser |
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| 26 | { |
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| 27 | public: |
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| 28 | virtual void Parse(const uint16_t len, const uint8_t *pbuf, const uint32_t &offset) = 0; |
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| 29 | }; |
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| 30 | |||
| 31 | struct MultiValueBuffer |
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| 32 | { |
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| 33 | uint8_t valueSize; |
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| 34 | void *pValue; |
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| 35 | }; |
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| 36 | |||
| 37 | class MultiByteValueParser |
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| 38 | { |
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| 39 | uint8_t * pBuf; |
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| 40 | uint8_t countDown; |
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| 41 | uint8_t valueSize; |
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| 42 | |||
| 43 | public: |
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| 44 | MultiByteValueParser() : pBuf(NULL), countDown(0), valueSize(0) {}; |
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| 45 | |||
| 46 | const uint8_t* GetBuffer() { return pBuf; }; |
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| 47 | |||
| 48 | void Initialize(MultiValueBuffer * const pbuf) |
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| 49 | { |
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| 50 | pBuf = (uint8_t*)pbuf->pValue; |
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| 51 | countDown = valueSize = pbuf->valueSize; |
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| 52 | }; |
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| 53 | |||
| 54 | bool Parse(uint8_t **pp, uint16_t *pcntdn); |
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| 55 | }; |
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| 56 | |||
| 57 | class ByteSkipper |
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| 58 | { |
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| 59 | uint8_t *pBuf; |
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| 60 | uint8_t nStage; |
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| 61 | uint16_t countDown; |
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| 62 | |||
| 63 | public: |
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| 64 | ByteSkipper() : pBuf(NULL), nStage(0), countDown(0) {}; |
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| 65 | |||
| 66 | void Initialize(MultiValueBuffer *pbuf) |
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| 67 | { |
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| 68 | pBuf = (uint8_t*)pbuf->pValue; |
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| 69 | countDown = 0; |
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| 70 | }; |
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| 71 | |||
| 72 | bool Skip(uint8_t **pp, uint16_t *pcntdn, uint16_t bytes_to_skip) |
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| 73 | { |
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| 74 | switch (nStage) |
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| 75 | { |
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| 76 | case 0: |
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| 77 | countDown = bytes_to_skip; |
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| 78 | nStage ++; |
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| 79 | case 1: |
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| 80 | for (; countDown && (*pcntdn); countDown--, (*pp)++, (*pcntdn)--); |
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| 81 | |||
| 82 | if (!countDown) |
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| 83 | nStage = 0; |
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| 84 | }; |
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| 85 | return (!countDown); |
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| 86 | }; |
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| 87 | }; |
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| 88 | |||
| 89 | // Pointer to a callback function triggered for each element of PTP array when used with PTPArrayParser |
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| 90 | typedef void (*PTP_ARRAY_EL_FUNC)(const MultiValueBuffer * const p, uint32_t count, const void *me); |
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| 91 | |||
| 92 | class PTPListParser |
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| 93 | { |
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| 94 | public: |
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| 95 | enum ParseMode { modeArray, modeRange/*, modeEnum*/ }; |
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| 96 | |||
| 97 | private: |
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| 98 | uint8_t nStage; |
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| 99 | uint8_t enStage; |
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| 100 | |||
| 101 | uint32_t arLen; |
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| 102 | uint32_t arLenCntdn; |
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| 103 | |||
| 104 | uint8_t lenSize; // size of the array length field in bytes |
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| 105 | uint8_t valSize; // size of the array element in bytes |
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| 106 | |||
| 107 | MultiValueBuffer *pBuf; |
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| 108 | |||
| 109 | // The only parser for both size and array element parsing |
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| 110 | MultiByteValueParser theParser; |
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| 111 | |||
| 112 | uint8_t /*ParseMode*/ prsMode; |
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| 113 | |||
| 114 | public: |
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| 115 | PTPListParser() : |
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| 116 | pBuf(NULL), |
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| 117 | nStage(0), |
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| 118 | enStage(0), |
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| 119 | arLenCntdn(0), |
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| 120 | arLen(0), |
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| 121 | lenSize(0), |
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| 122 | valSize(0), |
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| 123 | prsMode(modeArray) |
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| 124 | {}; |
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| 125 | |||
| 126 | void Initialize(const uint8_t len_size, const uint8_t val_size, MultiValueBuffer * const p, const uint8_t mode = modeArray) |
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| 127 | { |
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| 128 | pBuf = p; |
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| 129 | lenSize = len_size; |
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| 130 | valSize = val_size; |
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| 131 | prsMode = mode; |
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| 132 | |||
| 133 | if (prsMode == modeRange) |
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| 134 | { |
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| 135 | arLenCntdn = arLen = 3; |
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| 136 | nStage = 2; |
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| 137 | } |
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| 138 | else |
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| 139 | { |
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| 140 | arLenCntdn = arLen = 0; |
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| 141 | nStage = 0; |
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| 142 | } |
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| 143 | enStage = 0; |
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| 144 | theParser.Initialize(p); |
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| 145 | }; |
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| 146 | |||
| 147 | bool Parse(uint8_t **pp, uint16_t *pcntdn, PTP_ARRAY_EL_FUNC pf, const void *me = NULL); |
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| 148 | }; |
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| 149 | |||
| 150 | |||
| 151 | // Base class for outgoing data supplier |
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| 152 | class PTPDataSupplier |
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| 153 | { |
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| 154 | public: |
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| 155 | virtual uint32_t GetDataSize() = 0; |
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| 156 | virtual void GetData(const uint16_t len, uint8_t *pbuf) = 0; |
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| 157 | }; |
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| 158 | |||
| 159 | #endif // __PTPCALLBACK_H__ |