#include "common.h"

#include <iomanip>
#include <sstream>

bytes
from_hex(const std::string& hex)
{
  if (hex.length() % 2 == 1) {
    throw std::invalid_argument("Odd-length hex string");
  }

  auto len = int(hex.length() / 2);
  auto out = bytes(len);
  for (int i = 0; i < len; i += 1) {
    auto byte = hex.substr(2 * i, 2);
    out[i] = static_cast<uint8_t>(strtol(byte.c_str(), nullptr, 16));
  }

  return out;
}

std::string
to_hex(const sframe::input_bytes data)
{
  std::stringstream hex(std::ios_base::out);
  hex.flags(std::ios::hex);
  for (const auto& byte : data) {
    hex << std::setw(2) << std::setfill('0') << int(byte);
  }
  return hex.str();
}