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#pragma once
#include "data.h"
#include "stream_value.h"
#include <iostream>
#include <forstio/core/buffer.h>
#include <forstio/core/error.h>
namespace saw {
namespace encode {
struct KelSimple {};
}
template<typename T>
class data<T, encode::KelSimple> {
private:
ring_buffer buffer_;
public:
data() = default;
buffer& get_buffer(){
return buffer_;
}
};
namespace impl {
template<typename Schema, typename FromEnc>
class kelsimple_encode {
static_assert(always_false<Schema, FromEnc>, "This schema type is not being handled by the kelsimple encoding.");
};
template<typename T, size_t N, typename FromEnc>
struct kelsimple_encode<schema::Primitive<T,N>, FromEnc> {
static error_or<void> encode(const data<schema::Primitive<T,N>, FromEnc>& from, buffer& to){
auto eov = stream_value<schema::Primitive<T,N>>::encode(from.get(), to);
return eov;
}
};
template<typename T, size_t Dim, typename FromEnc>
struct kelsimple_encode<schema::Array<T,Dim>, FromEnc> {
template<std::size_t Level>
static error_or<void> encode_level(const data<schema::Array<T,Dim>, FromEnc>& from, buffer& to, std::array<std::size_t, Dim>& index){
if constexpr (Dim == Level){
return kelsimple_encode<T,FromEnc>::encode(from.at(index), to);
} else {
const std::size_t dim_size = from.get_dim_size(Level);
for(index[Level] = 0; (index.at(Level) < dim_size); ++index[Level]){
auto eov = encode_level<Level+1>(from, to, index);
if(eov.is_error()){
return eov;
}
}
}
return void_t{};
}
static error_or<void> encode(const data<schema::Array<T,Dim>, FromEnc>& from, buffer& to){
{
for(uint64_t i = 0; i < Dim; ++i){
auto eov = stream_value<schema::UInt64>::encode(from.get_dim_size(i), to);
if(eov.is_error()){
return eov;
}
}
}
{
std::array<std::size_t, Dim> index;
std::fill(index.begin(), index.end(), 0);
return encode_level<0>(from, to, index);
}
return void_t{};
}
};
template<typename... T, string_literal... Lits, typename FromEnc>
struct kelsimple_encode<schema::Struct<schema::Member<T,Lits>...>,FromEnc> {
template<std::size_t i>
static error_or<void> encode_member(const data<schema::Struct<schema::Member<T,Lits>...>, FromEnc>& from, buffer& to){
using Type = typename parameter_pack_type<i,T...>::type;
constexpr string_literal Literal = parameter_key_pack_type<i, Lits...>::literal;
{
auto eov = kelsimple_encode<Type, FromEnc>::encode(from.template get<Literal>(), to);
}
if constexpr ((i+1) < sizeof...(T)){
auto eov = encode_member<i+1>(from, to);
if(eov.is_error()){
return eov;
}
}
return void_t{};
}
static error_or<void> encode(const data<schema::Struct<schema::Member<T,Lits>...>, FromEnc>& from, buffer& to){
return encode_member<0>(from, to);
}
};
template<typename Schema, typename FromEnc>
class kelsimple_decode {
static_assert(always_false<Schema, FromEnc>, "This schema type is not being handled by the kelsimple encoding.");
};
template<typename T, size_t N, typename FromEnc>
struct kelsimple_decode<schema::Primitive<T,N>, FromEnc> {
static error_or<void> decode(buffer& from, data<schema::Primitive<T,N>, FromEnc>& to){
typename native_data_type<schema::Primitive<T,N>>::type val{};
auto eov = stream_value<schema::Primitive<T,N>>::decode(val, from);
if (eov.is_value()) {
to.set(val);
}
return eov;
}
};
template<typename T, size_t Dim, typename FromEnc>
struct kelsimple_decode<schema::Array<T,Dim>, FromEnc> {
template<std::size_t Level>
static error_or<void> decode_level(buffer& from, data<schema::Array<T,Dim>, FromEnc>& to, std::array<std::size_t, Dim>& index){
if constexpr (Level == Dim){
return kelsimple_decode<T, FromEnc>::decode(from, to.at(index));
}else{
const std::size_t dim_size = to.get_dim_size(Level);
for(index[Level] = 0; index[Level] < dim_size; ++index[Level]){
auto eov = decode_level<Level+1>(from, to, index);
if(eov.is_error()){
return eov;
}
}
}
return void_t{};
}
static error_or<void> decode(buffer& from, data<schema::Array<T,Dim>, FromEnc>& to){
{
std::array<std::size_t, Dim> dims{};
for(std::size_t i = 0; i < Dim; ++i){
uint64_t val{};
auto eov = stream_value<schema::UInt64>::decode(val, from);
if(eov.is_error()){
return eov;
}
dims.at(i) = static_cast<std::size_t>(val);
}
to = data<schema::Array<T,Dim>,FromEnc>{dims};
}
{
std::array<std::size_t, Dim> index{};
return decode_level<0>(from, to, index);
}
return void_t{};
}
};
template<typename... T, string_literal... Lits, typename FromEnc>
struct kelsimple_decode<schema::Struct<schema::Member<T,Lits>...>,FromEnc> {
template<std::size_t i>
static error_or<void> decode_member(buffer& from, data<schema::Struct<schema::Member<T,Lits>...>, FromEnc>& to){
using Type = typename parameter_pack_type<i,T...>::type;
constexpr string_literal Literal = parameter_key_pack_type<i, Lits...>::literal;
{
auto eov = kelsimple_decode<Type, FromEnc>::decode(from, to.template get<Literal>());
}
if constexpr ((i+1) < sizeof...(T)){
auto eov = decode_member<i+1>(from, to);
if(eov.is_error()){
return eov;
}
}
return void_t{};
}
static error_or<void> decode(buffer& from, data<schema::Struct<schema::Member<T,Lits>...>, FromEnc>& to){
return decode_member<0>(from, to);
}
};
}
template<typename Schema>
class codec<Schema, encode::KelSimple> {
public:
struct config {
size_t depth = 16;
size_t length = 1024;
};
private:
config cfg_;
public:
codec() = default;
SAW_FORBID_COPY(codec);
SAW_DEFAULT_MOVE(codec);
template<typename FromEnc>
error_or<void> encode(const data<Schema, FromEnc>& from_enc, data<Schema, encode::KelSimple>& to_enc){
buffer_view buff_v{to_enc.get_buffer()};
auto eov = impl::kelsimple_encode<Schema, FromEnc>::encode(from_enc, buff_v);
to_enc.get_buffer().write_advance(buff_v.write_offset());
return eov;
}
template<typename ToDec>
error_or<void> decode(data<Schema, encode::KelSimple>& from_dec, data<Schema, ToDec>& to){
buffer_view buff_v{from_dec.get_buffer()};
auto eov = impl::kelsimple_decode<Schema,ToDec>::decode(buff_v, to);
return eov;
}
};
}
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