/*

* Parallel Hash

* (C) 1999-2009 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#include <botan/internal/par_hash.h>

#include <botan/internal/parsing.h>

namespace Botan {

void Parallel::add_data(const uint8_t input[], size_t length)

   {

   for(auto&& hash : m_hashes)

       hash->update(input, length);

   }

void Parallel::final_result(uint8_t out[])

   {

   size_t offset = 0;

   for(auto&& hash : m_hashes)

      {

      hash->final(out + offset);

      offset += hash->output_length();

      }

   }

size_t Parallel::output_length() const

   {

   size_t sum = 0;

   for(auto&& hash : m_hashes)

      sum += hash->output_length();

   return sum;

   }

std::string Parallel::name() const

   {

   std::vector<std::string> names;

   for(auto&& hash : m_hashes)

      names.push_back(hash->name());

   return "Parallel(" + string_join(names, ',') + ")";

   }

std::unique_ptr<HashFunction> Parallel::new_object() const

   {

   std::vector<std::unique_ptr<HashFunction>> hash_copies;

   for(auto&& hash : m_hashes)

      hash_copies.push_back(std::unique_ptr<HashFunction>(hash->new_object()));

   return std::make_unique<Parallel>(hash_copies);

   }

std::unique_ptr<HashFunction> Parallel::copy_state() const

   {

   std::vector<std::unique_ptr<HashFunction>> hash_new_objects;

   for(const auto& hash : m_hashes)

      {

      hash_new_objects.push_back(hash->copy_state());

      }

   return std::make_unique<Parallel>(hash_new_objects);

   }

void Parallel::clear()

   {

   for(auto&& hash : m_hashes)

      hash->clear();

   }

Parallel::Parallel(std::vector<std::unique_ptr<HashFunction>>& hashes)

   {

   for(auto&& hash: hashes)

      {

      m_hashes.push_back(std::move(hash));

      }

   }

}