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//
// Created by bshp on 1/20/23.
//
#ifndef ICC_EXTRACTOR_TLVPARSER_H
#define ICC_EXTRACTOR_TLVPARSER_H
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include <string>
#include <memory>
#include "iostream"
#include "Tcdefs.h"
using namespace std;
struct TLVNode{
uint16_t Tag; /* T */
uint16_t Length; /* L */
unsigned char* Value; /* V */
unsigned char TagSize;
unsigned char LengthSize;
uint16_t MoreFlag; /* Used In Sub */
uint16_t SubFlag; /* Does it have sub-nodes? */
uint16_t SubCount;
shared_ptr<TLVNode> Sub[256];
shared_ptr<TLVNode> Next;
~TLVNode() {
burn(Value, Length);
delete Value;
}
};
class TLVParser{
private :
/* TLV node structure creation */
static shared_ptr<TLVNode> TLV_CreateNode();
/* Check if the bit is correct */
static uint16_t CheckBit(unsigned char value, int bit);
/* Parsing one TLV node */
static shared_ptr<TLVNode> TLV_Parse_One(unsigned char* buf,int size);
/* Parsing all TLV nodes */
static int TLV_Parse_SubNodes(shared_ptr<TLVNode> parent);
/* Parsing all sub-nodes (in width not in depth) of a given parent node */
static int TLV_Parse_All(shared_ptr<TLVNode> parent);
/* Recursive function to parse all nodes starting from a root parent node */
static void TLV_Parse_Sub(shared_ptr<TLVNode> parent);
public:
/* Parsing TLV from a buffer and constructing TLV structure */
static shared_ptr<TLVNode> TLV_Parse(unsigned char* buf,int size);
/* Finding a TLV node with a particular tag */
static shared_ptr<TLVNode> TLV_Find(shared_ptr<TLVNode> node,uint16_t tag);
};
/* The definition of the exception class related to the TLV parsing */
class TLVException
{
public:
TLVException(std::string errormessage): m_errormessage(errormessage){}
/* Get the error message */
inline std::string ErrorMessage() const
{
return m_errormessage;
}
protected:
std::string m_errormessage;
};
#endif //ICC_EXTRACTOR_TLVPARSER_H
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