From b23d4bf1d3a58b4a8304ca9cf050914e073de958 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Sun, 6 Aug 2023 00:25:51 +0200
Subject: c++,codec: Adding fixed array type to native encoding

---
 c++/codec/data.h | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'c++/codec/data.h')

diff --git a/c++/codec/data.h b/c++/codec/data.h
index 8ff06dc..129e704 100644
--- a/c++/codec/data.h
+++ b/c++/codec/data.h
@@ -243,6 +243,7 @@ private:
 			std::size_t stride = 1;
 
 			for(std::size_t iter = 0; iter < Dim; ++iter){
+				assert(i.at(iter) < dims_.at(iter));
 				s += i.at(iter) * stride;
 				stride *= dims_.at(iter);
 			}
@@ -251,6 +252,57 @@ private:
 		}
 };
 
+template<typename T, std::size_t... D>
+class data<schema::FixedArray<T,D...>, encode::Native> {
+private:
+	std::vector<data<T, encode::Native>> value_;
+	
+public:
+	data(){
+		data_.resize(ct_multiply<std::size_t, D...>::value);
+		std::fill(data_.begin(), data_.end(), 0ul);
+	}
+	
+	data<T, encode::Native>& at(const std::array<std::size_t, sizeof...(D)>& ind){
+		return value_.at(this->get_flat_index(ind));
+	}
+		
+	const data<T, encode::Native>& at(const std::array<std::size_t, sizeof...(D)>& ind) const {
+		return value_.at(this->get_flat_index(ind));
+	}
+
+	template<std::integral... Dims>
+	data<T, encode::Native>& at(Dims... i) {
+		return value_.at(this->get_flat_index({i...}));
+	}
+
+	template<std::integral... Dims>
+	const data<T, encode::Native>& at(Dims... i) const {
+		return value_.at(this->get_flat_index({i...}));
+	}
+
+	template<std::size_t i>
+	std::size_t get_dim_size() const {
+		return parameter_pack_value<i, std::size_t, D...>::value;
+	}
+private:
+	std::size_t get_flat_index(const std::array<std::size_t, sizeof...(D)>& i) const {
+		std::size_t s = 0;
+
+		std::size_t stride = 1;
+
+		constexpr static std::array<std::size_t, sizeof...(D)> dims_{D...};
+
+		for(std::size_t iter = 0; iter < sizeof...(D); ++iter){
+			assert(i.at(iter) < dims_.at(iter));
+			s += i.at(iter) * stride;
+			stride *= dims_.at(iter);
+		}
+
+		return s;
+	}
+};
+
 template<>
 class data<schema::String, encode::Native> {
 private:
-- 
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