X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fricsim%2Fsrc%2FASN1%2Fasn%2Fper%2Fvisitor.hpp;fp=e2sim%2Fe2apv1sim%2Fricsim%2Fsrc%2FASN1%2Fasn%2Fper%2Fvisitor.hpp;h=f379044e86d5d5386ef048283337e58a09f79ee4;hp=0000000000000000000000000000000000000000;hb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124;hpb=6896318f2b4ff01b4a88b16019c3dc93b0b693f5

diff --git a/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/visitor.hpp b/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/visitor.hpp
new file mode 100755
index 0000000..f379044
--- /dev/null
+++ b/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/visitor.hpp
@@ -0,0 +1,141 @@
+#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/per/common.hpp"
+
+namespace asn {
+namespace per {
+
+/********************************************************************************
+VisitorEncoder
+*********************************************************************************/
+struct VisitorEncoder
+{
+	explicit VisitorEncoder(EncoderCtx& ctx) : m_ctx(ctx) {}
+
+	template <typename IE>
+	bool operator() (IE const& ie) const
+	{
+		Element<IE, IE::ie_type>::run(ie, m_ctx);
+		return static_cast<bool>(m_ctx);
+	}
+	EncoderCtx&		m_ctx;
+};
+
+/********************************************************************************
+VisitorDecoder
+*********************************************************************************/
+struct VisitorDecoder
+{
+	VisitorDecoder(DecoderCtx& ctx) : m_ctx(ctx) {}
+
+	template <typename IE>
+	bool operator() (IE& ie) const
+	{
+		Element<IE, IE::ie_type>::run(ie, m_ctx);
+		return static_cast<bool>(m_ctx);
+	}
+	DecoderCtx& m_ctx;
+};
+
+/***************************************************************************************
+* Open Type Visitor // Encode Open Type (10.2)
+***************************************************************************************/
+struct OpenTypeVisitorEncoder
+{
+	explicit OpenTypeVisitorEncoder(EncoderCtx& ctx) : m_ctx(ctx) {}
+
+	template <typename IE>
+	bool operator() (IE const& ie) const
+	{
+		size_t reserved_size = 1; //1 byte length is most likely
+		Tools::bit_accessor::padByte(m_ctx.refBuffer());
+
+		if (m_ctx.refBuffer().getBytesLeft())
+		{
+			EncoderCtx::buf_type::pointer p = m_ctx.refBuffer().advance(reserved_size);
+			EncoderCtx::buf_type::pointer start = p + reserved_size;
+
+			Element<IE, IE::ie_type>::run(ie, m_ctx);
+
+			if (m_ctx)
+			{
+				Tools::bit_accessor::padByte(m_ctx.refBuffer());
+				EncoderCtx::buf_type::pointer p_new = m_ctx.refBuffer().begin();
+				size_t size = p_new - start;
+				size_t needed = LengthDeterminantDefault::bytes_needed(size) - reserved_size;
+				if (needed) //1 byte is not enough for the length determinant. it is hardly possible
+				{
+					if (m_ctx.refBuffer().getBytesLeft() < needed) {
+						m_ctx.refErrorCtx().lengthErrorBytes(m_ctx.refBuffer().getBytesLeft(), needed);
+						return false;
+					}
+					memmove(start + needed, start, size);
+					p_new += needed;
+				}
+				m_ctx.refBuffer().set_begin(p, 0);
+				LengthDeterminantDefault::run(m_ctx, size);
+				if (m_ctx) {
+					m_ctx.refBuffer().set_begin(p_new, 0);
+					Tools::bit_accessor::padByte(m_ctx.refBuffer());
+				}
+			}
+		}
+		else
+		{
+			m_ctx.refErrorCtx().lengthErrorBytes(m_ctx.refBuffer().getBytesLeft(), reserved_size);
+		}
+		return static_cast<bool>(m_ctx);
+	}
+	EncoderCtx& m_ctx;
+};
+
+/***************************************************************************************
+* Open Type Visitor // Decode Open Type (10.2)
+***************************************************************************************/
+struct OpenTypeVisitorDecoder
+{
+	explicit OpenTypeVisitorDecoder(DecoderCtx& ctx) : m_ctx(ctx) {}
+
+	template <typename IE>
+	bool operator() (IE& ie) const
+	{
+		size_t size = LengthDeterminantDefault::run(m_ctx);
+		DecoderCtx::buf_type& buffer = m_ctx.refBuffer();
+		if (buffer.getBytesLeft() < size)
+		{
+			m_ctx.refErrorCtx().lengthErrorBytes(buffer.getBytesLeft(), size);
+			return false;
+		}
+		DecoderCtx::buf_type::pointer end = buffer.end();
+		buffer.set_end(buffer.begin() + size);
+		Element<IE, IE::ie_type>::run(ie, m_ctx);
+		buffer.set_end(end);
+
+		return static_cast<bool>(m_ctx);
+	}
+	DecoderCtx& m_ctx;
+};
+
+} //namespace per
+} //namespace asn