phoenix_varint.cpp

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/***************************************
        Auteur : Pierre Aubert
        Mail : pierre.aubert@lapp.in2p3.fr
        Licence : CeCILL-C
****************************************/
 
 
#include "phoenix_varint.h"
 


size_t phoenix_varIntToValue(const std::vector<uint8_t> & vecBitSize){
        size_t res(0lu), factor(1lu), nbByte(vecBitSize.size());
        for(size_t i(0lu); i < nbByte; ++i){
                size_t value(vecBitSize[i]);
                res += value * factor;
                factor *= 128lu;
        }
        return res;
}


size_t phoenix_readVarInt(char* & iter){
        std::vector<uint8_t> vecBitSize;
        bool isExtraByte(false);
        do{
                char packedSizeVal = *iter;
                uint8_t val = packedSizeVal & 127;
                vecBitSize.push_back(val);      //Get the first 7 bytes
                isExtraByte = packedSizeVal & 128;      //Get only the strong bit
                iter += 1lu;
        }while(isExtraByte);
        return phoenix_varIntToValue(vecBitSize);
}


void phoenix_skipVarInt(char* & iter){
        bool isExtraByte(false);
        do{
                char packedSizeVal = *iter;
                isExtraByte = packedSizeVal & 128;      //Get only the strong bit
                iter += 1lu;
        }while(isExtraByte);
}