--- /dev/null
+#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 {
+
+//15.11 Default
+template <class IE, class Enabler = void>
+struct BitstringNoExt
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+ LengthDeterminant<typename IE::constraint_t>::run(ctx, ie.get_bitqty());
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+
+ const u8 tail = ie.get_bitqty() % 8;
+ if (tail)
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size() - 1);
+ u8 last_byte = *(ie.get_buffer().data() + ie.get_buffer().size() - 1);
+
+ last_byte <<= 8 - tail;
+ ctx.refBuffer().putBytes(&last_byte, 1);
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, tail);
+ }
+ else
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size());
+ }
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ size_t len = LengthDeterminant<typename IE::constraint_t>::run(ctx, false);
+ size_t len_bytes = (len + 7) >> 3;
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ u8 const* data_in = ctx.refBuffer().getBytes(len_bytes);
+ if (data_in)
+ {
+ u8* data_out = ctx.refAllocator().alloc_bytes(len_bytes);
+ if (data_out)
+ {
+ memcpy(data_out, data_in, len_bytes);
+ const u8 shift = len % 8;
+ if (shift)
+ {
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, shift);
+ data_out[len_bytes - 1] >>= 8 - shift;
+ }
+ ie.set_buffer(len, data_out);
+ }
+ else
+ ctx.refErrorCtx().allocatorNoMem(0, len_bytes);
+ }
+ }
+};
+
+//15.8 Zero length
+template <class IE>
+struct BitstringNoExt<IE, std::enable_if_t< (IE::constraint_t::upper_bound == 0)> >
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx) {/* do nothing */ }
+ static void inline run(IE& ie, DecoderCtx& ctx) { ie.setpresent(true); }
+};
+
+//15.9 Up to 6 bits, fixed length
+template <class IE>
+struct BitstringNoExt<IE, std::enable_if_t<
+ ((IE::constraint_t::upper_bound == IE::constraint_t::lower_bound) && (IE::constraint_t::upper_bound <= 8) && (IE::constraint_t::upper_bound > 0))
+>>
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+ Tools::bit_accessor::put((static_cast<u8>(ie.get_buffer().data()[0])) & (0xFF >> (8 - IE::constraint_t::upper_bound)),
+ IE::constraint_t::upper_bound, ctx.refBuffer());
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ u8 * data = ctx.refAllocator().alloc_bytes(1);
+ if (data)
+ {
+ data[0] = Tools::bit_accessor::get(IE::constraint_t::upper_bound, ctx.refBuffer());
+ ie.set_buffer(IE::constraint_t::upper_bound, data);
+ }
+ else
+ ctx.refErrorCtx().allocatorNoMem(0, 1);
+ }
+};
+template <class IE>
+struct BitstringNoExt<IE, std::enable_if_t<
+ ((IE::constraint_t::upper_bound == IE::constraint_t::lower_bound) && (IE::constraint_t::upper_bound <= 16) && (IE::constraint_t::upper_bound > 8))
+>>
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+ Tools::bit_accessor::put(ie.get_buffer().data()[0], 8, ctx.refBuffer());
+ Tools::bit_accessor::put((static_cast<u8>(ie.get_buffer().data()[1])) & (0xFF >> (16 - IE::constraint_t::upper_bound)),
+ IE::constraint_t::upper_bound - 8, ctx.refBuffer());
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ u8 * data = ctx.refAllocator().alloc_bytes(2);
+ if (data)
+ {
+ data[0] = Tools::bit_accessor::get(8, ctx.refBuffer());
+ data[1] = Tools::bit_accessor::get(IE::constraint_t::upper_bound - 8, ctx.refBuffer());
+ ie.set_buffer(IE::constraint_t::upper_bound, data);
+ }
+ else
+ ctx.refErrorCtx().allocatorNoMem(0, 2);
+ }
+};
+
+//15.10 More than 6 bits, up to 64K bits, fixed length
+template <class IE>
+struct BitstringNoExt<IE, std::enable_if_t<
+ ((IE::constraint_t::upper_bound == IE::constraint_t::lower_bound) && (IE::constraint_t::upper_bound < 65536) && (IE::constraint_t::upper_bound > 16))
+>>
+{
+ constexpr static size_t len_bytes = (IE::constraint_t::upper_bound + 7) >> 3;
+
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ if (ie.get_buffer().size() != len_bytes)
+ {
+ ctx.refErrorCtx().sizeRangeError(ie.get_buffer().size(), len_bytes, len_bytes);
+ }
+ else
+ {
+ const u8 tail = ie.get_bitqty() % 8;
+ if (tail)
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size() - 1);
+ u8 last_byte = *(ie.get_buffer().data() + ie.get_buffer().size() - 1);
+ last_byte <<= 8 - tail;
+ ctx.refBuffer().putBytes(&last_byte, 1);
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, tail);
+ }
+ else
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size());
+ }
+ }
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ u8 const* data_in = ctx.refBuffer().getBytes(len_bytes);
+ if (data_in)
+ {
+ u8* data_out = ctx.refAllocator().alloc_bytes(len_bytes);
+ if (data_out)
+ {
+ memcpy(data_out, data_in, len_bytes);
+ const u8 shift = IE::constraint_t::upper_bound % 8;
+ if (shift)
+ {
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, shift);
+ data_out[len_bytes - 1] >>= 8 - shift;
+ }
+ ie.set_buffer(IE::constraint_t::upper_bound, data_out);
+ }
+ else
+ ctx.refErrorCtx().allocatorNoMem(0, len_bytes);
+ }
+ }
+};
+
+/**************************************************/
+
+template <class IE, class Enabler = void>
+struct Bitstring;
+
+//15.6 : Extension present
+template <class IE>
+struct Bitstring<IE, std::enable_if_t< (IE::constraint_t::extended == true)> >
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+
+ if (ie.get_bitqty() <= IE::constraint_t::upper_bound && ie.get_bitqty() >= IE::constraint_t::lower_bound)
+ {
+ Tools::bit_accessor::put(0, 1, ctx.refBuffer());
+ BitstringNoExt<IE>::run(ie, ctx);
+ }
+ else
+ {
+ Tools::bit_accessor::put(1, 1, ctx.refBuffer());
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ LengthDeterminant<typename IE::constraint_t>::run(ctx, ie.get_bitqty());
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ const u8 tail = ie.get_bitqty() % 8;
+ if (tail)
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size() - 1);
+ u8 last_byte = *(ie.get_buffer().data() + ie.get_buffer().size() - 1);
+
+ last_byte <<= 8 - tail;
+
+ ctx.refBuffer().putBytes(&last_byte, 1);
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, tail);
+ }
+ else
+ {
+ ctx.refBuffer().putBytes(ie.get_buffer().data(), ie.get_buffer().size());
+ }
+ }
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ u8 ext = Tools::bit_accessor::get(1, ctx.refBuffer());
+ if (ext)
+ {
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ const size_t len = LengthDeterminant<typename IE::constraint_t>::run(ctx, true);
+ const size_t len_bytes = (len + 7) >> 3;
+ Tools::bit_accessor::padByte(ctx.refBuffer());
+ u8 const* data_in = ctx.refBuffer().getBytes(len_bytes);
+ if (data_in)
+ {
+ u8* data_out = ctx.refAllocator().alloc_bytes(len_bytes);
+ if (data_out)
+ {
+ memcpy(data_out, data_in, len_bytes);
+ const u8 shift = len % 8;
+ if (shift)
+ {
+ ctx.refBuffer().set_begin(ctx.refBuffer().begin() - 1, shift);
+ data_out[len_bytes - 1] >>= 8 - shift;
+ }
+ ie.set_buffer(len, data_out);
+ }
+ else
+ ctx.refErrorCtx().allocatorNoMem(0, len_bytes);
+ }
+ }
+ else
+ BitstringNoExt<IE>::run(ie, ctx);
+ }
+};
+
+//15.7 : No extension
+template <class IE>
+struct Bitstring<IE, std::enable_if_t< (IE::constraint_t::extended == false)> >
+{
+ static void inline run(IE const& ie, EncoderCtx& ctx)
+ {
+ BitstringNoExt<IE>::run(ie, ctx);
+ }
+ static void inline run(IE& ie, DecoderCtx& ctx)
+ {
+ BitstringNoExt<IE>::run(ie, ctx);
+ }
+};
+
+} //namespace per
+} //namespace asn
Code Review / sim / e2-interface.git / blobdiff