[C++] Add EncodingOffset and EncodingLength values

Author: Nikolay Amiantov

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java

@@ -1009,6 +1009,15 @@ private CharSequence generatePrimitiveFieldMetaData(final String propertyName, f
  propertyName,
  generateLiteral(primitiveType, token.encoding().applicableMaxValue().toString())));
 
+ sb.append(String.format(
+ "\n" +
+ indent + " static SBE_CONSTEXPR const std::size_t %1$sEncodingLength(void)\n" +
+ indent + " {\n" +
+ indent + " return %2$d;\n" +
+ indent + " }\n",
+ propertyName,
+ token.encoding().primitiveType().size()));
+
  return sb;
  }
 
@@ -1441,6 +1450,14 @@ private CharSequence generateFields(final String containingClassName, final List
  propertyName,
  (long)signalToken.version()));
 
+ sb.append(String.format(
+ indent + " static SBE_CONSTEXPR const std::size_t %1$sEncodingOffset(void)\n" +
+ indent + " {\n" +
+ indent + " return %2$d;\n" +
+ indent + " }\n\n",
+ propertyName,
+ encodingToken.offset()));
+
  generateFieldMetaAttributeMethod(sb, signalToken, indent);
 
  switch (encodingToken.signal())
@@ -1568,6 +1585,14 @@ private CharSequence generateEnumProperty(
  typeName,
  offset,
  formatByteOrderEncoding(token.encoding().byteOrder(), token.encoding().primitiveType())));
+
+ sb.append(String.format(
+ indent + " static SBE_CONSTEXPR const std::size_t %1$sEncodingLength(void)\n" +
+ indent + " {\n" +
+ indent + " return %2$d;\n" +
+ indent + " }\n",
+ propertyName,
+ token.encoding().primitiveType().size()));
  }
 
  return sb;
@@ -1594,11 +1619,20 @@ private static Object generateBitsetProperty(final String propertyName, final To
  indent + " {\n" +
  indent + " m_%2$s.wrap(m_buffer, m_offset + %3$d, m_actingVersion, m_bufferLength);\n" +
  indent + " return m_%2$s;\n" +
- indent + " }\n",
+ indent + " }\n\n",
  bitsetName,
  propertyName,
  offset));
 
+ sb.append(String.format(
+ "\n" +
+ indent + " static SBE_CONSTEXPR const std::size_t %1$sEncodingLength(void)\n" +
+ indent + " {\n" +
+ indent + " return %2$d;\n" +
+ indent + " }\n",
+ propertyName,
+ token.encoding().primitiveType().size()));
+
  return sb;
  }