AppNearMe µNFC stack for the NXP PN532 chip License: You can use the stack free of charge to prototype with mbed; if you want to use the stack with your commercial product, get in touch!
Dependents: IOT_sensor_nfc AppNearMe_MuNFC_PN532_Test p2p_nfc_test NFCMoodLamp ... more
License
You can use the stack free of charge to prototype with mbed; if you want to use the stack with your commercial product, get in touch!
Diff: PN532/TLVList.cpp
- Revision:
- 0:480387549d89
- Child:
- 1:1074716d0111
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PN532/TLVList.cpp Thu Jul 26 09:12:27 2012 +0000 @@ -0,0 +1,236 @@ +/* + TLVList.cpp + Copyright (c) Donatien Garnier 2012 + donatien.garnier@appnearme.com + http://www.appnearme.com/ +*/ + +#include "TLVList.h" + +#include "munfc/core/fwk.h" +#include "munfc/ndef/appnearme_ndef_tlv.h" + +#include <cstring> //For memcpy, strlen +using std::memcpy; +using std::strlen; + +TLVList::TLVList() : m_tlvList(NULL) +{ + +} + +void TLVList::wrap(tlv_list* payload) +{ + m_tlvList = payload; + m_space = true; + m_type = NONE; +} + + + +/* Getters */ + +/** Iterate to next item + * @return type if next item exists, NONE otherwise + */ +TLVList::TLVType TLVList::getNext() +{ + if(!m_tlvList) + { + return NONE; + } + + m_type = (TLVList::TLVType) appnearme_ndef_tlv_next_type(m_tlvList); //Explicit cast, this is the same enum + switch(m_type) + { + case UINT8: + m_arrayLen = 0; + m_uint8 = appnearme_ndef_tlv_get_uint8(m_tlvList); + break; + case UINT32: + m_arrayLen = 0; + m_uint32 = appnearme_ndef_tlv_get_uint32(m_tlvList); + break; + case UINT8_ARRAY: + //In this order, otherwise would break state-machine + m_arrayLen = appnearme_ndef_tlv_get_array_length(m_tlvList); + m_array = appnearme_ndef_tlv_get_array(m_tlvList); + break; + case STRING: + //In this order, otherwise would break state-machine + m_strLen = appnearme_ndef_tlv_get_string_length(m_tlvList); + m_str = appnearme_ndef_tlv_get_string(m_tlvList); + break; + } + return m_type; +} + +/** Get uint8_t value + * If the current item's type is uint32_t, the value will be masked with 0xFF + * @return uint8_t value OR 0 if the type is incompatible + */ +uint8_t TLVList::getUInt8() +{ + switch(m_type) + { + case UINT8: + return m_uint8; + case UINT32: + return m_uint32 & 0xFF; + default: + return 0; + } +} + +/** Get uint32_t value + * If the current item's type is uint8_t, the value will be casted to uint32_t + * @return uint32_t value OR 0 if the type is incompatible + */ +uint32_t TLVList::getUInt32() +{ + switch(m_type) + { + case UINT32: + return m_uint32; + case UINT8: + return m_uint8 & 0xFF; + default: + return 0; + } +} + +/** Get array length + * @return bytes array length + */ +size_t TLVList::getArrayLength() +{ + switch(m_type) + { + case UINT8_ARRAY: + return m_arrayLen; + default: + return 0; + } +} + +/** Get array + * @param buf pointer to buffer's start + * @param maxLen maximum number of bytes to copy + * @return number of copied bytes + */ +size_t TLVList::getArray(uint8_t* buf, size_t maxLen) +{ + if(m_type != UINT8_ARRAY) + { + return 0; + } + size_t len = MIN(maxLen, m_arrayLen); + memcpy(buf, m_array, len); + return len; +} + +/** Get string length + * @return string length + */ +size_t TLVList::getStringLength() +{ + switch(m_type) + { + case STRING: + return m_strLen; + default: + return 0; + } +} + + +/** Get string + * Copy string to buffer (including null-terminating char) + * @param str pointer to string's start + * @param maxLen maximum number of chars to copy (not including null-terminating char) + * @return number of copied chars + */ +size_t TLVList::getString(char* str, size_t maxLen) +{ + if(m_type != STRING) + { + return 0; + } + size_t len = MIN(maxLen, m_strLen); + memcpy(str, m_str, len); + return len; +} + +/* Setters */ + +/** Check whether there is space left in list + * @return true if there is space left, false otherwise + */ +bool TLVList::isSpace() +{ + return m_space; +} + +/** Put uint8_t value + * @param value uint8_t value + * @return true on success, false if there is not enough space in buffer + */ +bool TLVList::putUInt8(uint8_t value) +{ + int res = appnearme_ndef_tlv_put_uint8(m_tlvList, value); + if( !res ) + { + m_space = false; + return false; + } + return true; +} + +/** Put uint32_t value + * @param value uint32_t value + * @return true on success, false if there is not enough space in buffer + */ +bool TLVList::putUInt32(uint32_t value) +{ + int res = appnearme_ndef_tlv_put_uint32(m_tlvList, value); + if( !res ) + { + m_space = false; + return false; + } + return true; +} + +/** Put array + * @param buf pointer to buffer's start + * @param len number of bytes to copy + * @return number of copied bytes + */ +size_t TLVList::putArray(uint8_t* buf, size_t len) +{ + int res = appnearme_ndef_tlv_put_array(m_tlvList, buf, len); + if( !res ) + { + m_space = false; + return 0; + } + return len; +} + +/** Put string + * @param str pointer to null-terminated string's start + * @return number of copied bytes + */ +size_t TLVList::putString(char* str) +{ + int res = appnearme_ndef_tlv_put_string(m_tlvList, str); + if( !res ) + { + m_space = false; + return 0; + } + return strlen(str); +} + + +