Enhanced SIM for E2AP v1 for TS UC

[sim/e2-interface.git] / e2sim / e2apv1sim / src / ASN1 / asn / per / integer.hpp

diff --git a/e2sim/e2apv1sim/src/ASN1/asn/per/integer.hpp b/e2sim/e2apv1sim/src/ASN1/asn/per/integer.hpp
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+++ b/e2sim/e2apv1sim/src/ASN1/asn/per/integer.hpp
@@ -0,0 +1,154 @@
+#pragma once
+/******************************************************************************
+*
+*   Copyright (c) 2019 AT&T Intellectual Property.
+*   Copyright (c) 2018-2019 Nokia.
+*
+*   Licensed under the Apache License, Version 2.0 (the "License");
+*   you may not use this file except in compliance with the License.
+*   You may obtain a copy of the License at
+*
+*       http://www.apache.org/licenses/LICENSE-2.0
+*
+*   Unless required by applicable law or agreed to in writing, software
+*   distributed under the License is distributed on an "AS IS" BASIS,
+*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*   See the License for the specific language governing permissions and
+*   limitations under the License.
+*
+******************************************************************************/
+
+// Standard Includes: ANSI C/C++, MSA, and Third-Party Libraries
+
+// Local Includes: Application specific classes, functions, and libraries
+#include "asn/elements.hpp"
+#include "asn/per/common.hpp"
+#include "asn/per/binary_integer.hpp"
+#include "asn/per/whole_number.hpp"
+
+namespace asn {
+namespace per {
+
+template<class IE, class Enable = void>
+struct Integer;
+
+template<class IE>
+struct Integer<IE, std::enable_if_t<IE::constraint_t::type == constraint_type::CONSTRAINED> >
+{
+       static void inline run(IE const& ie, EncoderCtx& ctx)
+       {
+               if(IE::constraint_t::is_extended(ie.get()))
+               {
+                       ctx.refErrorCtx().valueRangeError(static_cast<size_t>(ie.get()));
+                       return;
+               }
+               ConstrainedWholeNumber<typename IE::constraint_t, typename IE::value_type>::run(ctx, ie.get());
+       }
+       static void inline run(IE& ie, DecoderCtx& ctx)
+       {
+               ie.set(ConstrainedWholeNumber<typename IE::constraint_t, typename IE::value_type>::run(ctx));
+       }
+};
+
+template<class IE>
+struct Integer<IE, std::enable_if_t<IE::constraint_t::type == constraint_type::CONSTRAINED_EXTENDED> >
+{
+       //X.691 12.1
+       static void inline run(IE const& ie, EncoderCtx& ctx)
+       {
+               if (!IE::constraint_t::is_extended(ie.get()))
+               {
+                       Tools::bit_accessor::put(0, 1, ctx.refBuffer());
+                       //X.691 12.2
+                       ConstrainedWholeNumber<typename IE::constraint_t, typename IE::value_type>::run(ctx, ie.get());
+               }
+               else
+               {
+                       Tools::bit_accessor::put(1, 1, ctx.refBuffer());
+                       //X.691 12.2.4, 12.2.6, 10.8s
+                       TwosComplementBinaryInteger<IE>::run(ie, ctx);
+               }
+       }
+       static void inline run(IE& ie, DecoderCtx& ctx)
+       {
+
+               u8 ext = Tools::bit_accessor::get(1, ctx.refBuffer());
+               if (ext)
+                       TwosComplementBinaryInteger<IE>::run(ie, ctx);
+               else
+                       ie.set(ConstrainedWholeNumber<typename IE::constraint_t, typename IE::value_type>::run(ctx));
+       }
+};
+
+// (X.691 10.7)
+template<class IE>
+struct Integer<IE, std::enable_if_t<IE::constraint_t::type == constraint_type::SEMICONSTRAINED> >
+{
+       static void inline run(IE const& ie, EncoderCtx& ctx)
+       {
+               if(IE::constraint_t::is_extended(ie.get()))
+               {
+                       ctx.refErrorCtx().valueRangeError(static_cast<size_t>(ie.get()));
+                       return;
+               }
+               NonnegativeBinaryInteger<typename IE::constraint_t>::run(ie.get() - IE::constraint_t::lower_bound, ctx);
+       }
+       static void inline run(IE& ie, DecoderCtx& ctx)
+       {
+               typename IE::value_type val = 0;
+               NonnegativeBinaryInteger<typename IE::constraint_t>::run(val, ctx, false);
+               ie.set(IE::constraint_t::lower_bound + val);
+       }
+};
+
+template<class IE>
+struct Integer<IE, std::enable_if_t<IE::constraint_t::type == constraint_type::SEMICONSTRAINED_EXTENDED> >
+{
+       static void inline run(IE const& ie, EncoderCtx& ctx)
+       {
+               if (!IE::constraint_t::is_extended(ie.get()))
+               {
+                       Tools::bit_accessor::put(0, 1, ctx.refBuffer());
+                       NonnegativeBinaryInteger<typename IE::constraint_t>::run(ie.get() - IE::constraint_t::lower_bound, ctx);
+               }
+               else
+               {
+                       Tools::bit_accessor::put(1, 1, ctx.refBuffer());
+                       TwosComplementBinaryInteger<IE>::run(ie, ctx);
+               }
+       }
+       static void inline run(IE& ie, DecoderCtx& ctx)
+       {
+               u8 ext = Tools::bit_accessor::get(1, ctx.refBuffer());
+
+               if (ext)
+                       TwosComplementBinaryInteger<IE>::run(ie, ctx);
+               else
+               {
+                       typename IE::value_type val = 0;
+                       NonnegativeBinaryInteger<typename IE::constraint_t>::run(val, ctx, false);
+                       ie.set(val + IE::constraint_t::lower_bound);
+               }
+       }
+};
+
+/***************************************************************************************
+* Encoding of an unconstrained whole number (X.691 10.8)
+***************************************************************************************/
+
+template<class IE>
+struct Integer<IE, std::enable_if_t<IE::constraint_t::type == constraint_type::UNCONSTRAINED> >
+{
+       static void inline run(IE const& ie, EncoderCtx& ctx)
+       {
+               TwosComplementBinaryInteger<IE>::run(ie, ctx);
+       }
+       static void inline run(IE& ie, DecoderCtx& ctx)
+       {
+               TwosComplementBinaryInteger<IE>::run(ie, ctx);
+       }
+};
+
+} //namespace per
+} //namespace asn
+