Enhanced SIM for E2AP v1 for TS UC

[sim/e2-interface.git] / e2sim / e2apv1sim / src / ASN1 / asn / ber / opentype.hpp

diff --git a/e2sim/e2apv1sim/src/ASN1/asn/ber/opentype.hpp b/e2sim/e2apv1sim/src/ASN1/asn/ber/opentype.hpp
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+#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
+
+namespace asn {
+namespace ber {
+
+/***************************************************************************************
+* OpenType
+***************************************************************************************/
+struct OpenType
+{
+       static tag_value_t decode(DecoderCtx& ctx, size_t& length, tag_value_t const* tag_ptr = nullptr)
+       {
+               auto & buffer = ctx.refBuffer();
+               tag_value_t tag = tag_ptr ? *tag_ptr : get_tag(ctx);
+               length = Length::decode(ctx);
+               
+               if(!length)
+               {
+                       //just return
+               }
+               else if(length == indefinite_length)
+               {
+                       tag_value_t _tag;
+                       size_t _length;
+                       do
+                       {
+                               _tag = OpenType::decode(ctx, _length);
+
+                       } while(ctx && !(_tag == 0 && _length == 0));
+               }
+               else
+               {
+                       if (buffer.getBytesLeft() < length)
+                       {
+                               ctx.refErrorCtx().lengthErrorBytes(buffer.getBytesLeft(), length);
+                       }
+                       else
+                       {
+                               size_t _length;
+                               DecoderCtx::buf_type::pointer end = buffer.end();
+                               buffer.set_end(buffer.begin() + length);
+                               decode(ctx, _length);
+                               buffer.set_end(end);
+                       }
+               }
+               return tag;
+       }
+};
+
+} //namespace ber
+} //namespace asn
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