circom/ports/c/utils.cpp

#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <stdlib.h>

#include "utils.h"

std::string int_to_hex( u64 i )
{
  std::stringstream stream;
  stream << "0x"
         << std::setfill ('0') << std::setw(16)
         << std::hex << i;
  return stream.str();
}

u64 fnv1a(std::string s) {
  u64 hash = 0xCBF29CE484222325LL;
  for(char& c : s) {
    hash ^= u64(c);
    hash *= 0x100000001B3LL;
  }
  return hash;
}