Diff: PN532/TLVList.cpp

Revision:

11:5be631376e5b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PN532/TLVList.cpp	Wed Nov 07 18:19:09 2012 +0000
@@ -0,0 +1,246 @@
+/*
+    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 current item's type.
+*  @return type if item exists, NONE otherwise
+*/
+TLVList::TLVType TLVList::getType()
+{
+  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);
+  str[len] = '\0'; //Add null-terminating char
+  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);
+}
+
+
+
+