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/*
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 * Copyright (c) 2015-2016, Luca Fulchir<luca@fulchir.it>, All rights reserved.
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 *
 * This file is part of "libRaptorQ".
 *
 * libRaptorQ is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * libRaptorQ is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and a copy of the GNU Lesser General Public License
 * along with libRaptorQ.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "RaptorQ/v1/RFC.hpp"
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#include "RaptorQ/v1/wrapper/C_RFC_API.h"
#include "RaptorQ/v1/wrapper/CPP_RFC_API.hpp"
#include "RaptorQ/v1/caches.hpp"
#include <chrono>
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#include <future>
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#include <memory>

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struct RAPTORQ_LOCAL RaptorQ_ptr
{
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    void *ptr;
    const RaptorQ_type type;
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    RaptorQ_ptr (const RaptorQ_type _type) : ptr (nullptr), type (_type) {}
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};

struct RAPTORQ_LOCAL RaptorQ_future
{
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    std::future<std::pair<RFC6330__v1::Error, uint8_t>> f;
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void RAPTORQ_LOCAL RFC6330_test_del (struct RaptorQ_ptr **ptr);
void RAPTORQ_LOCAL RFC6330_test_del (struct RaptorQ_ptr **ptr)
{
    if (ptr == nullptr || *ptr == nullptr ||
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                                        (*ptr)->type == RaptorQ_type::RQ_NONE
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                                                    || (*ptr)->ptr == nullptr) {
        if (ptr != nullptr) {
            delete *ptr;
            *ptr = nullptr;
            return;
        }
        return;
    }
    switch ((*ptr)->type) {
    case RaptorQ_type::RQ_ENC_8:
        if(!(reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_ENC_16:
        if(!(reinterpret_cast<RFC6330__v1::Encoder<uint16_t, uint16_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_ENC_32:
        if(!(reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_ENC_64:
        if(!(reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_DEC_8:
        if(!(reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_DEC_16:
        if(!(reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_DEC_32:
        if(!(reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_DEC_64:
        if(!(reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                                (*ptr)->ptr))) {
            RaptorQ_free (ptr);
            return;
        }
        break;
    case RaptorQ_type::RQ_NONE:
        assert(false && "RaptorQ: C Wrapper: should not have gotten here");
        break;
    }
    return;
}

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struct RaptorQ_ptr *RaptorQ_Enc (const RaptorQ_type type, void *data,
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                                            const uint64_t size,
                                            const uint16_t min_subsymbol_size,
                                            const uint16_t symbol_size,
                                            const size_t max_memory)
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{
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    std::unique_ptr<RaptorQ_ptr> ret (new RaptorQ_ptr (type));
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    switch (type) {
    case RaptorQ_type::RQ_ENC_8:
        ret->ptr = reinterpret_cast<void *> (
                    new RFC6330__v1::Encoder<uint8_t*, uint8_t*> (
                                    reinterpret_cast<uint8_t*> (data),
                                    reinterpret_cast<uint8_t*> (data) + size,
                                    min_subsymbol_size,
                                    symbol_size,
                                    max_memory));
        break;
    case RaptorQ_type::RQ_ENC_16:
        ret->ptr = reinterpret_cast<void *> (
                    new RFC6330__v1::Encoder<uint16_t*, uint16_t*> (
                                    reinterpret_cast<uint16_t*> (data),
                                    reinterpret_cast<uint16_t*> (data) + size,
                                    min_subsymbol_size,
                                    symbol_size,
                                    max_memory));
        break;
    case RaptorQ_type::RQ_ENC_32:
        ret->ptr = reinterpret_cast<void *> (
                    new RFC6330__v1::Encoder<uint32_t*, uint32_t*> (
                                    reinterpret_cast<uint32_t*> (data),
                                    reinterpret_cast<uint32_t*> (data) + size,
                                    min_subsymbol_size,
                                    symbol_size,
                                    max_memory));
        break;
    case RaptorQ_type::RQ_ENC_64:
        ret->ptr = reinterpret_cast<void *> (
                    new RFC6330__v1::Encoder<uint64_t*, uint64_t*> (
                                    reinterpret_cast<uint64_t*> (data),
                                    reinterpret_cast<uint64_t*> (data) + size,
                                    min_subsymbol_size,
                                    symbol_size,
                                    max_memory));
        break;
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return new RaptorQ_ptr (RaptorQ_type::RQ_NONE);
    }
    auto raw_ptr = ret.release();
    RFC6330_test_del (&raw_ptr);
    return raw_ptr;
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}

struct RaptorQ_ptr *RaptorQ_Dec (const RaptorQ_type type,
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                            const RaptorQ_OTI_Common_Data common,
                            const RaptorQ_OTI_Scheme_Specific_Data scheme)
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{
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    std::unique_ptr<RaptorQ_ptr> ret (new RaptorQ_ptr (type));
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    switch (type) {
    case RaptorQ_type::RQ_DEC_8:
        ret->ptr = reinterpret_cast<void *> (
                new RFC6330__v1::Decoder<uint8_t*, uint8_t*> (common, scheme));
        break;
    case RaptorQ_type::RQ_DEC_16:
        ret->ptr = reinterpret_cast<void *> (
                new RFC6330__v1::Decoder<uint16_t*, uint16_t*> (common,scheme));
        break;
    case RaptorQ_type::RQ_DEC_32:
        ret->ptr = reinterpret_cast<void *> (
                new RFC6330__v1::Decoder<uint32_t*, uint32_t*> (common,scheme));
        break;
    case RaptorQ_type::RQ_DEC_64:
        ret->ptr = reinterpret_cast<void *> (
                new RFC6330__v1::Decoder<uint64_t*, uint64_t*> (common,scheme));
        break;
    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        return new RaptorQ_ptr (RaptorQ_type::RQ_NONE);
    }
    auto raw_ptr = ret.release();
    RFC6330_test_del (&raw_ptr);
    return raw_ptr;
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}

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///////////////////////////
// Precomputation caching
///////////////////////////

RaptorQ_Compress RaptorQ_supported_compressions()
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{
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    return static_cast<RaptorQ_Compress>(RaptorQ__v1::supported_compressions());
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}

RaptorQ_Compress RaptorQ_get_compression()
{
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    return static_cast<RaptorQ_Compress>(RaptorQ__v1::get_compression());
}

bool RaptorQ_set_compression (const RaptorQ_Compress compression)
{
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    return static_cast<RaptorQ_Compress> (RaptorQ__v1::set_compression (
                            static_cast<RaptorQ__v1::Compress> (compression)));
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size_t RaptorQ_shared_cache_size (const size_t shared_cache)
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    return RaptorQ__v1::shared_cache_size (shared_cache);
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RaptorQ_Error RaptorQ_local_cache_size (const size_t local_cache)
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{
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    return static_cast<RaptorQ_Error> (RaptorQ__v1::local_cache_size (
                                                                local_cache));
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}

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size_t RaptorQ_get_shared_cache_size ()
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{
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    return RFC6330__v1::get_shared_cache_size();
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}

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size_t RaptorQ_get_local_cache_size ()
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{
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    return RFC6330__v1::get_local_cache_size();
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}

/////////////////////
// Common functions
/////////////////////


bool RaptorQ_set_thread_pool (const size_t threads,
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                                        const uint16_t max_block_concurrency,
                                        const RaptorQ_Work exit_type)
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    return RFC6330__v1::set_thread_pool (threads, max_block_concurrency,
                            static_cast<RaptorQ__v1::Work_State> (exit_type));
}

RaptorQ_Error RaptorQ_future_valid (struct RaptorQ_future *future)
{
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    if (future == nullptr)
        return RQ_ERR_WRONG_INPUT;
    if (future->f.valid())
        return static_cast<RaptorQ_Error> (future->f.get().first);
    return RQ_ERR_WORKING;
}

RaptorQ_Error RaptorQ_future_wait_for (struct RaptorQ_future *future,
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                                                const uint64_t time,
                                                const RaptorQ_Unit_Time unit)
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    if (future == nullptr)
        return RQ_ERR_WRONG_INPUT;
    std::future_status status = std::future_status::timeout;
    switch (unit) {
    case RQ_TIME_NANOSEC:
        status = future->f.wait_for (std::chrono::nanoseconds (time));
        break;
    case RQ_TIME_MICROSEC:
        status = future->f.wait_for (std::chrono::microseconds (time));
        break;
    case RQ_TIME_MILLISEC:
        status = future->f.wait_for (std::chrono::milliseconds (time));
        break;
    case RQ_TIME_SEC:
        status = future->f.wait_for (std::chrono::seconds (time));
        break;
    case RQ_TIME_MIN:
        status = future->f.wait_for (std::chrono::minutes (time));
        break;
    case RQ_TIME_HOUR:
        status = future->f.wait_for (std::chrono::hours (time));
        break;
    }
    if (status == std::future_status::ready)
        return static_cast<RaptorQ_Error> (future->f.get().first);
    return RQ_ERR_WORKING;
}

void RaptorQ_future_wait (struct RaptorQ_future *future)
{
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    if (future == nullptr)
        return;
    future->f.wait();
}

struct RaptorQ_Result RaptorQ_future_get (struct RaptorQ_future *future)
{
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    RaptorQ_Result res = {RQ_ERR_WRONG_INPUT, 0};
    if (future == nullptr)
        return res;
    RFC6330__v1::Error err;
    std::tie (err, res.sbn) = future->f.get(); // already calls wait();
    res.error = static_cast<RaptorQ_Error> (err);
    return res;
}

void RaptorQ_future_free (struct RaptorQ_future **future)
{
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    if (future == nullptr || *future == nullptr)
        return;
    delete *future;
    *future = nullptr;
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RaptorQ_future* RaptorQ_compute (RaptorQ_ptr *ptr, const RaptorQ_Compute flags)
{
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    if (ptr == nullptr || ptr->type == RaptorQ_type::RQ_NONE ||
                                                            ptr->ptr == nullptr)
        return nullptr;
    const RFC6330__v1::Compute cpp_flags =
                                    static_cast<RFC6330__v1::Compute> (flags);
    std::future<std::pair<RaptorQ__v1::Error, uint8_t>> f;
    switch (ptr->type) {
    case RaptorQ_type::RQ_ENC_8:
        f = (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_ENC_16:
        f = (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_ENC_32:
        f = (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_ENC_64:
        f = (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_DEC_8:
        f = (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_DEC_16:
        f = (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_DEC_32:
        f = (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_DEC_64:
        f = (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                            ptr->ptr))->compute (cpp_flags);
        break;
    case RaptorQ_type::RQ_NONE:
        return nullptr;
    }
    RaptorQ_future *ret = new RaptorQ_future();
    ret->f = std::move(f);
    return ret;
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///////////
// Encoding
///////////

RaptorQ_OTI_Common_Data RaptorQ_OTI_Common (struct RaptorQ_ptr *enc)
{
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    if (enc == nullptr || enc->type == RaptorQ_type::RQ_NONE ||
                                                            enc->ptr == nullptr)
        return 0;
    switch (enc->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                    enc->ptr))->OTI_Common();
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                                    enc->ptr))->OTI_Common();
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                    enc->ptr))->OTI_Common();
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                    enc->ptr))->OTI_Common();
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

RaptorQ_OTI_Scheme_Specific_Data RaptorQ_OTI_Scheme (struct RaptorQ_ptr *enc)
{
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    if (enc == nullptr || enc->type == RaptorQ_type::RQ_NONE ||
                                                            enc->ptr == nullptr)
        return 0;
    switch (enc->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                            enc->ptr))->OTI_Scheme_Specific();
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                            enc->ptr))->OTI_Scheme_Specific();
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                            enc->ptr))->OTI_Scheme_Specific();
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                            enc->ptr))->OTI_Scheme_Specific();
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

uint16_t RaptorQ_symbol_size (RaptorQ_ptr *ptr) {
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    if (ptr == nullptr || ptr->type == RaptorQ_type::RQ_NONE ||
                                                            ptr->ptr == nullptr)
        return 0;
    switch (ptr->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->symbol_size();
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}
uint8_t RaptorQ_blocks (RaptorQ_ptr *ptr)
{
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    if (ptr == nullptr || ptr->type == RaptorQ_type::RQ_NONE ||
                                                            ptr->ptr == nullptr)
        return 0;
    switch (ptr->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t, uint16_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                        ptr->ptr))->blocks();
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}
uint32_t RaptorQ_block_size (RaptorQ_ptr *ptr, const uint8_t sbn)
{
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    if (ptr == nullptr || ptr->type == RaptorQ_type::RQ_NONE ||
                                                            ptr->ptr == nullptr)
        return 0;
    switch (ptr->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->block_size(sbn);
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

uint16_t RaptorQ_symbols (RaptorQ_ptr *ptr, const uint8_t sbn)
{
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    if (ptr == nullptr || ptr->type == RaptorQ_type::RQ_NONE ||
                                                            ptr->ptr == nullptr)
        return 0;
    switch (ptr->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                    ptr->ptr))->symbols(sbn);
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

uint32_t RaptorQ_max_repair (RaptorQ_ptr *enc, const uint8_t sbn)
{
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    if (enc == nullptr || enc->type == RaptorQ_type::RQ_NONE ||
                                                            enc->ptr == nullptr)
        return 0;
    switch (enc->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                                enc->ptr))->max_repair (sbn);
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                                enc->ptr))->max_repair (sbn);
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                                enc->ptr))->max_repair (sbn);
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                                enc->ptr))->max_repair (sbn);
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

size_t RaptorQ_precompute_max_memory (RaptorQ_ptr *enc)
{
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    if (enc == nullptr || enc->type == RaptorQ_type::RQ_NONE ||
                                                            enc->ptr == nullptr)
        return 0;
    switch (enc->type) {
    case RaptorQ_type::RQ_ENC_8:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                            enc->ptr))->precompute_max_memory();
    case RaptorQ_type::RQ_ENC_16:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                            enc->ptr))->precompute_max_memory();
    case RaptorQ_type::RQ_ENC_32:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                            enc->ptr))->precompute_max_memory();
    case RaptorQ_type::RQ_ENC_64:
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                            enc->ptr))->precompute_max_memory();
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

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size_t RaptorQ_encode_id (RaptorQ_ptr *enc, void **data, const size_t size,
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                                                            const uint32_t id)
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{
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    uint8_t sbn = id >> 24;
    uint32_t esi = (id << 8) >> 8;
    return RaptorQ_encode (enc, data, size, esi, sbn);
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}

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size_t RaptorQ_encode (RaptorQ_ptr *enc, void **data, const size_t size,
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                                                            const uint32_t esi,
                                                            const uint8_t sbn)
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{
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    if (enc == nullptr || enc->type == RaptorQ_type::RQ_NONE ||
                enc->ptr == nullptr || data == nullptr || *data == nullptr) {
        return 0;
    }
    // uhm... better ideas?
    uint8_t *p_8;
    uint16_t *p_16;
    uint32_t *p_32;
    uint64_t *p_64;
    switch (enc->type) {
    case RaptorQ_type::RQ_ENC_8:
        p_8 = reinterpret_cast<uint8_t*> (*data);
        return (reinterpret_cast<RFC6330__v1::Encoder<uint8_t*, uint8_t*>*> (
                                enc->ptr))->encode (p_8, p_8 + size,esi, sbn);
    case RaptorQ_type::RQ_ENC_16:
        p_16 = reinterpret_cast<uint16_t*> (*data);
        return (reinterpret_cast<RFC6330__v1::Encoder<uint16_t*, uint16_t*>*> (
                                enc->ptr))->encode (p_16, p_16 + size,esi, sbn);
    case RaptorQ_type::RQ_ENC_32:
        p_32 = reinterpret_cast<uint32_t*> (*data);
        return (reinterpret_cast<RFC6330__v1::Encoder<uint32_t*, uint32_t*>*> (
                                enc->ptr))->encode (p_32, p_32 + size,esi, sbn);
    case RaptorQ_type::RQ_ENC_64:
        p_64 = reinterpret_cast<uint64_t*> (*data);
        return (reinterpret_cast<RFC6330__v1::Encoder<uint64_t*, uint64_t*>*> (
                                enc->ptr))->encode (p_64, p_64 + size,esi, sbn);
    case RaptorQ_type::RQ_DEC_8:
    case RaptorQ_type::RQ_DEC_16:
    case RaptorQ_type::RQ_DEC_32:
    case RaptorQ_type::RQ_DEC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
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#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
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#endif
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}

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uint32_t RaptorQ_id (const uint32_t esi, const uint8_t sbn)
{
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    uint32_t ret = static_cast<uint32_t> (sbn) << 24;
    ret += esi % static_cast<uint32_t> (std::pow (2, 24));
    return ret;
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///////////
// Decoding
///////////
void RAPTORQ_API RaptorQ_end_of_input (struct RaptorQ_ptr *dec)
{
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    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE)
        return;
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    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                    dec->ptr))->end_of_input();
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    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                    dec->ptr))->end_of_input();
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    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                    dec->ptr))->end_of_input();
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    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                    dec->ptr))->end_of_input();
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    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        return;
    }
}


void RAPTORQ_API RaptorQ_end_of_block_input (struct RaptorQ_ptr *dec,
                                                            const uint8_t block)
{
    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE)
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        return;
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    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                            dec->ptr))->end_of_input (block);
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    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                            dec->ptr))->end_of_input (block);
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    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                            dec->ptr))->end_of_input (block);
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    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                            dec->ptr))->end_of_input (block);
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    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        return;
    }
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uint64_t RaptorQ_bytes (struct RaptorQ_ptr *dec)
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    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE)
        return 0;
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    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                        dec->ptr))->bytes ();
    case RaptorQ_type::RQ_DEC_16:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                        dec->ptr))->bytes ();
    case RaptorQ_type::RQ_DEC_32:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                        dec->ptr))->bytes ();
    case RaptorQ_type::RQ_DEC_64:
        return (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                        dec->ptr))->bytes ();
    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        return 0;
    }
#ifndef USING_CLANG
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    // uncomment the return and:
    // clang: WARN: will never be executed (exaustive switch)
    // if commented, GCC: warn: control reaches end of non-void
    // ...make up your mind, guys?
    return 0;
uint64_t RaptorQ_decode_bytes (RaptorQ_ptr *dec, void **data,
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                                        const uint64_t size, const uint8_t skip)
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    uint64_t written = 0;
    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE ||
                        dec->ptr == nullptr || data == nullptr || size <= skip){
        return written;
    }
    uint8_t *p_8;
    uint16_t *p_16;
    uint32_t *p_32;
    uint64_t *p_64;
    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        p_8 = reinterpret_cast<uint8_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                dec->ptr))->decode_bytes (p_8,  p_8  + size, skip);
        *data = p_8;
        break;
    case RaptorQ_type::RQ_DEC_16:
        p_16 = reinterpret_cast<uint16_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                dec->ptr))->decode_bytes (p_16, p_16 + size, skip);
        *data = p_16;
        break;
    case RaptorQ_type::RQ_DEC_32:
        p_32 = reinterpret_cast<uint32_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                dec->ptr))->decode_bytes (p_32, p_32 + size, skip);
        *data = p_32;
        break;
    case RaptorQ_type::RQ_DEC_64:
        p_64 = reinterpret_cast<uint64_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                dec->ptr))->decode_bytes (p_64, p_64 + size, skip);
        *data = p_64;
        break;
    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        break;
    }
    return written;
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size_t RaptorQ_decode_block_bytes (RaptorQ_ptr *dec, void **data,
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                                                            const size_t size,
                                                            const uint8_t skip,
                                                            const uint8_t sbn)
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    size_t written = 0;
    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE ||
                                    dec->ptr == nullptr || data == nullptr) {
        return written;
    }
    uint8_t *p_8;
    uint16_t *p_16;
    uint32_t *p_32;
    uint64_t *p_64;
    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        p_8 = reinterpret_cast<uint8_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                            dec->ptr))->decode_block_bytes (p_8, p_8 + size,
                                                                    skip, sbn);
        *data = p_8;
        break;
    case RaptorQ_type::RQ_DEC_16:
        p_16 = reinterpret_cast<uint16_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                            dec->ptr))->decode_block_bytes (p_16, p_16 + size,
                                                                    skip, sbn);
        *data = p_16;
        break;
    case RaptorQ_type::RQ_DEC_32:
        p_32 = reinterpret_cast<uint32_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                            dec->ptr))->decode_block_bytes (p_32, p_32 + size,
                                                                    skip, sbn);
        *data = p_32;
        break;
    case RaptorQ_type::RQ_DEC_64:
        p_64 = reinterpret_cast<uint64_t*> (*data);
        written = (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                            dec->ptr))->decode_block_bytes (p_64, p_64 + size,
                                                                    skip, sbn);
        *data = p_64;
        break;
    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        break;
    }
    return written;
}

RaptorQ_Dec_Result RaptorQ_decode_aligned (RaptorQ_ptr *dec, void **data,
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                                        const uint64_t size, const uint8_t skip)
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{
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    RaptorQ_Dec_Result c_ret = {0, 0};
    if (dec == nullptr || dec->type == RaptorQ_type::RQ_NONE ||
                        dec->ptr == nullptr || data == nullptr || size <= skip){
        return c_ret;
    }
    uint8_t *p_8;
    uint16_t *p_16;
    uint32_t *p_32;
    uint64_t *p_64;
    std::pair<size_t, uint8_t> ret = {0, 0};
    switch (dec->type) {
    case RaptorQ_type::RQ_DEC_8:
        p_8 = reinterpret_cast<uint8_t*> (*data);
        ret = (reinterpret_cast<RFC6330__v1::Decoder<uint8_t*, uint8_t*>*> (
                                                dec->ptr))->decode_aligned (
                                                    p_8,  p_8  + size, skip);
        *data = p_8;
        break;
    case RaptorQ_type::RQ_DEC_16:
        p_16 = reinterpret_cast<uint16_t*> (*data);
        ret = (reinterpret_cast<RFC6330__v1::Decoder<uint16_t*, uint16_t*>*> (
                                                dec->ptr))->decode_aligned (
                                                    p_16, p_16 + size, skip);
        *data = p_16;
        break;
    case RaptorQ_type::RQ_DEC_32:
        p_32 = reinterpret_cast<uint32_t*> (*data);
        ret = (reinterpret_cast<RFC6330__v1::Decoder<uint32_t*, uint32_t*>*> (
                                                dec->ptr))->decode_aligned (
                                                    p_32, p_32 + size, skip);
        *data = p_32;
        break;
    case RaptorQ_type::RQ_DEC_64:
        p_64 = reinterpret_cast<uint64_t*> (*data);
        ret = (reinterpret_cast<RFC6330__v1::Decoder<uint64_t*, uint64_t*>*> (
                                                dec->ptr))->decode_aligned (
                                                    p_64, p_64 + size, skip);
        *data = p_64;
        break;
    case RaptorQ_type::RQ_ENC_8:
    case RaptorQ_type::RQ_ENC_16:
    case RaptorQ_type::RQ_ENC_32:
    case RaptorQ_type::RQ_ENC_64:
    case RaptorQ_type::RQ_NONE:
        break;
    }
    c_ret.written = std::get<0> (ret);
    c_ret.skip = std::get<1> (ret);
    return c_ret;
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}

RaptorQ_Dec_Result RaptorQ_decode_block_aligned (RaptorQ_ptr *dec, void **data,
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                                                            const size_t size,
                                                            const uint8_t skip,
                                                            const uint8_t sbn)