X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fsrc%2FASN1%2Fasn%2Fber%2Flength.hpp;fp=e2sim%2Fe2apv1sim%2Fsrc%2FASN1%2Fasn%2Fber%2Flength.hpp;h=51b387ce30c4fbaf47eca991739fda2b03cc0eeb;hp=0000000000000000000000000000000000000000;hb=0eba05c4ff0c99974d3f3a63b65cbe2adb209e51;hpb=c380e183231711cf9f8bc72d0eb52e532dd07085

diff --git a/e2sim/e2apv1sim/src/ASN1/asn/ber/length.hpp b/e2sim/e2apv1sim/src/ASN1/asn/ber/length.hpp
new file mode 100755
index 0000000..51b387c
--- /dev/null
+++ b/e2sim/e2apv1sim/src/ASN1/asn/ber/length.hpp
@@ -0,0 +1,103 @@
+#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 {
+
+constexpr size_t indefinite_length = std::numeric_limits<size_t>::max();
+
+/***************************************************************************************
+* Length
+***************************************************************************************/
+struct Length
+{
+	static size_t inline get(int64_t value)
+	{
+		size_t length = 1;
+		
+		if(value != 0)
+		{
+			size_t extra_sign_bits = __builtin_clrsbll(value);
+			length  = sizeof(value) - (extra_sign_bits >> 3) ;
+		}
+		
+		return length;
+	}
+	
+	static void inline encode(size_t length, EncoderCtx& ctx)
+	{
+		auto & buffer = ctx.refBuffer();
+		
+		if(length <= 0x7F)
+		{
+			buffer.putByte(static_cast<uint8_t>(length));
+		}
+		else
+		{
+			size_t lenlen = get(length);
+			if(lenlen > 0x7F)
+			{
+				ctx.refErrorCtx().sizeRangeError(length, 0, 0x7F);
+			}
+			else
+			{
+				uint8_t bt = static_cast<uint8_t>(lenlen);
+				bt |= 0x80;
+				buffer.putByte(bt);
+				Tools::put_bytes(length, lenlen, ctx);
+			}
+		}
+
+	}
+	
+	static size_t inline decode(DecoderCtx& ctx)
+	{
+		auto & buffer = ctx.refBuffer();
+		size_t length = 0;
+		
+		uint8_t const* data = buffer.getBytes(1);
+		
+		if(data)
+		{
+			if(!(data[0] & 0x80))
+			{
+				length = data[0];
+			}
+			else
+			{
+				size_t lenlen = data[0] & 0x7F;
+				
+				if(lenlen)
+					Tools::get_bytes(length, lenlen, ctx);
+				else
+					length = indefinite_length;
+			}
+		}
+		
+		return length;
+	}
+};
+
+} //namespace ber
+} //namespace asn