From 7668b8aceb42b5a46e1f9ca36d16dbfabe291748 Mon Sep 17 00:00:00 2001
From: Claudius Holeksa <mail@keldu.de>
Date: Mon, 26 Jun 2023 18:19:15 +0200
Subject: c++,codec: Introduced Tuple and String as KelSimple Encoding

---
 src/codec/data.h   | 11 +++++++
 src/codec/simple.h | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 103 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/codec/data.h b/src/codec/data.h
index a43fdd8..9eb2bfc 100644
--- a/src/codec/data.h
+++ b/src/codec/data.h
@@ -244,6 +244,9 @@ public:
 	SAW_DEFAULT_MOVE(data);
 
 	data(std::string value__):value_{std::move(value__)}{}
+	data(std::size_t size_){
+		value_.resize(size_);
+	}
 
 	std::size_t size() const {
 		return value_.size();
@@ -253,6 +256,14 @@ public:
 		value_ = std::move(str);
 	}
 
+	char& at(size_t i) {
+		return value_.at(i);
+	}
+
+	const char& at(size_t i) const {
+		return value_.at(i);
+	}
+
 	char get_at(size_t i) const{
 		return value_.at(i);
 	}
diff --git a/src/codec/simple.h b/src/codec/simple.h
index ad66f66..8712c6d 100644
--- a/src/codec/simple.h
+++ b/src/codec/simple.h
@@ -3,8 +3,6 @@
 #include "data.h"
 #include "stream_value.h"
 
-#include <iostream>
-
 #include <forstio/core/buffer.h>
 #include <forstio/core/error.h>
 
@@ -99,6 +97,52 @@ struct kelsimple_encode<schema::Struct<schema::Member<T,Lits>...>,FromEnc> {
 	}
 };
 
+template<typename... T, typename FromEnc>
+struct kelsimple_encode<schema::Tuple<T...>, FromEnc> {
+	template<std::size_t i>
+	static error_or<void> encode_member(const data<schema::Tuple<T...>, FromEnc>& from, buffer& to){
+		using Type = typename parameter_pack_type<i,T...>::type;
+		{
+			auto eov = kelsimple_encode<Type, FromEnc>::encode(from.template get<i>(), 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::Tuple<T...>, FromEnc>& from, buffer& to){
+		return encode_member<0>(from, to);
+	}
+};
+
+template<typename FromEnc>
+struct kelsimple_encode<schema::String, FromEnc> {
+	static error_or<void> encode(const data<schema::String, FromEnc>& from, buffer& to){
+		const auto str_size = from.size();
+		typename native_data_type<schema::UInt64>::type str_len = static_cast<uint64_t>(str_size);
+		{
+			auto eov = stream_value<schema::UInt64>::encode(str_len, to);
+			if(eov.is_error()){
+				return eov;
+			}
+		}
+
+		for(std::size_t i = 0; i < str_size; ++i){
+			auto eov = stream_value<schema::Int8>::encode(from.at(i), to);
+			if(eov.is_error()){
+				return eov;
+			}
+		}
+
+		return void_t{};
+	}
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 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.");
@@ -178,6 +222,52 @@ struct kelsimple_decode<schema::Struct<schema::Member<T,Lits>...>,FromEnc> {
 	}
 	
 };
+template<typename... T, typename FromEnc>
+struct kelsimple_decode<schema::Tuple<T...>,FromEnc> {
+	template<std::size_t i>
+	static error_or<void> decode_member(buffer& from, data<schema::Tuple<T...>, FromEnc>& to){
+		using Type = typename parameter_pack_type<i,T...>::type;
+		{
+			auto eov = kelsimple_decode<Type, FromEnc>::decode(from, to.template get<i>());
+		}
+		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::Tuple<T...>, FromEnc>& to){
+		return decode_member<0>(from, to);
+	}
+	
+};
+template<typename FromEnc>
+struct kelsimple_decode<schema::String, FromEnc> {
+	static error_or<void> decode(buffer& from, data<schema::String, FromEnc>& to){
+		{
+			uint64_t val{};
+			auto eov = stream_value<schema::UInt64>::decode(val, from);
+			if(eov.is_error()){
+				return eov;
+			}
+			to = data<schema::String,FromEnc>{val};
+		}
+		const std::size_t str_size = to.size();
+		for(std::size_t i = 0; i < str_size; ++i){
+			int8_t val{};
+			auto eov = stream_value<schema::Int8>::decode(val, from);
+			if(eov.is_error()){
+				return eov;
+			}
+			to.set_at(i, val);
+		}
+		return void_t{};
+	}
+};
+
 }
 
 template<typename Schema>
-- 
cgit v1.2.3