BIP 101 Max Block Size

#include <stdio.h>
#include <stdint.h>

uint64_t MaxBlockSize(uint64_t nBlockTimestamp, uint64_t nSizeForkActivationTime);

 /** Maximum block size parameters */
uint32_t nMaxSizePreFork = 1000*1000;
uint64_t nEarliestSizeForkTime = 1452470400;
uint32_t nSizeDoubleEpoch = 60*60*24*365*2;
uint64_t nMaxSizeBase =  8*1000*1000;
uint8_t nMaxSizeDoublings = 10;
uint64_t nSizeForkGracePeriod = 60*60*24;

int main() {
    uint64_t blockTime=nEarliestSizeForkTime;

    printf("blockTime,maxSize\n");
    for(int i=1;i<64;i++) {
        MaxBlockSize( blockTime, nEarliestSizeForkTime );
        printf( "%llu,%llu\n", blockTime, MaxBlockSize( blockTime, 1438387200 ) );
        blockTime=blockTime+2592000; //add 30 days
    }


}

uint64_t MaxBlockSize(uint64_t nBlockTimestamp, uint64_t nSizeForkActivationTime) {
        if (nBlockTimestamp < nEarliestSizeForkTime || nBlockTimestamp < nSizeForkActivationTime)
            return nMaxSizePreFork;
        if (nBlockTimestamp >= nEarliestSizeForkTime + nSizeDoubleEpoch * nMaxSizeDoublings)
            return nMaxSizeBase << nMaxSizeDoublings;

        // Piecewise-linear-between-doublings growth. Calculated based on a fixed
        // timestamp and not the activation time so the maximum size is
        // predictable, and so the activation time can be completely removed in
        // a future version of this code after the fork is complete.
        uint64_t timeDelta = nBlockTimestamp - nEarliestSizeForkTime;
        uint64_t doublings = timeDelta / nSizeDoubleEpoch;
        uint64_t remain = timeDelta % nSizeDoubleEpoch;
        uint64_t interpolate = (nMaxSizeBase << doublings) * remain / nSizeDoubleEpoch;
        uint64_t nMaxSize = (nMaxSizeBase << doublings) + interpolate;
       // printf("%llu,%llu,%llu,%llu,%llu\n",timeDelta,doublings,remain,interpolate,nMaxSize);
        return nMaxSize;
    }