Base class for static-typed field encoders/decoders that use a fixed number of bits on the wire regardless of the value of the field. Use TypedFieldCodec if your encoder is variable length. See TypedFieldCodec for an explanation of the template parameters (FieldType and WireType). More...
#include <dccl/field_codec_fixed.h>
Inheritance diagram for dccl::TypedFixedFieldCodec< WireType, FieldType >:
Public Member Functions | |
| virtual unsigned | size ()=0 |
| The size of the encoded message in bits. Use TypedFieldCodec if the size depends on the data. | |
| unsigned | size (const WireType &wire_value) |
| Calculate the size (in bits) of a non-empty field. More... | |
| unsigned | max_size () |
| Calculate maximum size of the field in bits. More... | |
| unsigned | min_size () |
| Calculate minimum size of the field in bits. More... | |
 Public Member Functions inherited from dccl::TypedFieldCodec< WireType, WireType > | |
| virtual Bitset | encode ()=0 |
| Encode an empty field. More... | |
| virtual Bitset | encode (const WireType &wire_value)=0 |
| Encode a non-empty field. More... | |
| virtual WireType | decode (Bitset *bits)=0 |
| Decode a field. If the field is empty (i.e. was encoded using the zero-argument encode()), throw NullValueException to indicate this. More... | |
| Public Member Functions inherited from dccl::FieldCodecSelector< WireType, WireType > | |
| virtual WireType | pre_encode (const WireType &field_value)=0 |
| Convert from the FieldType representation (used in the Google Protobuf message) to the WireType representation (used with encode() and decode(), i.e. "on the wire"). More... | |
| virtual WireType | post_decode (const WireType &wire_value)=0 |
| Convert from the WireType representation (used with encode() and decode(), i.e. "on the wire") to the FieldType representation (used in the Google Protobuf message). More... | |
| Public Member Functions inherited from dccl::FieldCodecBase | |
| FieldCodecBase () | |
| virtual | ~FieldCodecBase () |
| void | base_encode (Bitset *bits, const google::protobuf::Message &msg, MessagePart part, bool strict) |
| Encode this part (body or head) of the base message. More... | |
| void | base_size (unsigned *bit_size, const google::protobuf::Message &msg, MessagePart part) |
| Calculate the size (in bits) of a part of the base message when it is encoded. More... | |
| void | base_decode (Bitset *bits, google::protobuf::Message *msg, MessagePart part) |
| Decode part of a message. More... | |
| void | base_max_size (unsigned *bit_size, const google::protobuf::Descriptor *desc, MessagePart part) |
| Calculate the maximum size of a message given its Descriptor alone (no data) More... | |
| void | base_min_size (unsigned *bit_size, const google::protobuf::Descriptor *desc, MessagePart part) |
| Calculate the minimum size of a message given its Descriptor alone (no data) More... | |
| void | base_validate (const google::protobuf::Descriptor *desc, MessagePart part) |
| Validate this part of the message to make sure all required extensions are set. More... | |
| void | base_info (std::ostream *os, const google::protobuf::Descriptor *desc, MessagePart part) |
| Get human readable information (size of fields, etc.) about this part of the DCCL message. More... | |
| std::string | name () const |
| the name of the codec used to identifier it in the .proto custom option extension | |
| google::protobuf::FieldDescriptor::Type | field_type () const |
| the type exposed to the user in the original and decoded Protobuf messages More... | |
| google::protobuf::FieldDescriptor::CppType | wire_type () const |
| the C++ type used "on the wire". This is the type visible after pre_encode and before post_decode functions are called. More... | |
| const google::protobuf::FieldDescriptor * | this_field () const |
| Returns the FieldDescriptor (field schema meta-data) for this field. More... | |
| void | set_force_use_required (bool force_required=true) |
| Force the codec to always use the "required" field encoding, regardless of the FieldDescriptor setting. Useful when wrapping this codec in another that handles optional and repeated fields. | |
| void | field_pre_encode (boost::any *wire_value, const boost::any &field_value) |
| Pre-encodes a non-repeated (i.e. optional or required) field by converting the FieldType representation (the Google Protobuf representation) into the WireType representation (the type used in the encoded DCCL message). This allows for type-converting codecs. More... | |
| void | field_pre_encode_repeated (std::vector< boost::any > *wire_values, const std::vector< boost::any > &field_values) |
| Pre-encodes a repeated field. More... | |
| void | field_encode (Bitset *bits, const boost::any &field_value, const google::protobuf::FieldDescriptor *field) |
| Encode a non-repeated field. More... | |
| void | field_encode_repeated (Bitset *bits, const std::vector< boost::any > &field_values, const google::protobuf::FieldDescriptor *field) |
| Encode a repeated field. More... | |
| void | field_size (unsigned *bit_size, const boost::any &field_value, const google::protobuf::FieldDescriptor *field) |
| Calculate the size of a field. More... | |
| void | field_size_repeated (unsigned *bit_size, const std::vector< boost::any > &field_values, const google::protobuf::FieldDescriptor *field) |
| Calculate the size of a repeated field. More... | |
| void | field_decode (Bitset *bits, boost::any *field_value, const google::protobuf::FieldDescriptor *field) |
| Decode a non-repeated field. More... | |
| void | field_decode_repeated (Bitset *bits, std::vector< boost::any > *field_values, const google::protobuf::FieldDescriptor *field) |
| Decode a repeated field. More... | |
| void | field_post_decode (const boost::any &wire_value, boost::any *field_value) |
| Post-decodes a non-repeated (i.e. optional or required) field by converting the WireType (the type used in the encoded DCCL message) representation into the FieldType representation (the Google Protobuf representation). This allows for type-converting codecs. More... | |
| void | field_post_decode_repeated (const std::vector< boost::any > &wire_values, std::vector< boost::any > *field_values) |
| Post-decodes a repeated field. More... | |
| void | field_max_size (unsigned *bit_size, const google::protobuf::FieldDescriptor *field) |
| Calculate the upper bound on this field's size (in bits) More... | |
| void | field_min_size (unsigned *bit_size, const google::protobuf::FieldDescriptor *field) |
| Calculate the lower bound on this field's size (in bits) More... | |
| void | field_validate (bool *b, const google::protobuf::FieldDescriptor *field) |
| Validate this field, checking that all required option extensions are set (e.g. (dccl.field).max and (dccl.field).min for arithmetic codecs) More... | |
| void | field_info (std::ostream *os, const google::protobuf::FieldDescriptor *field) |
| Write human readable information about the field and its bounds to the provided stream. More... | |
Additional Inherited Members | |
| Public Types inherited from dccl::TypedFieldCodec< WireType, WireType > | |
| typedef WireType | wire_type |
| typedef WireType | field_type |
| Static Public Member Functions inherited from dccl::FieldCodecBase | |
| static const google::protobuf::Descriptor * | this_descriptor () |
| Returns the Descriptor (message schema meta-data) for the immediate parent Message. More... | |
| static const google::protobuf::Message * | root_message () |
| static bool | has_codec_group () |
| static std::string | codec_group (const google::protobuf::Descriptor *desc) |
| static std::string | codec_group () |
| static int | codec_version () |
| static MessagePart | part () |
| the part of the message currently being encoded (head or body). | |
| static bool | strict () |
| Protected Member Functions inherited from dccl::FieldCodecBase | |
| dccl::DCCLFieldOptions | dccl_field_options () const |
| Get the DCCL field option extension value for the current field. More... | |
| void | require (bool b, const std::string &description) |
| Essentially an assertion to be used in the validate() virtual method. More... | |
| bool | use_required () |
| Whether to use the required or optional encoding. | |
| virtual void | validate () |
| Validate a field. Use require() inside your overloaded validate() to assert requirements or throw Exceptions directly as needed. | |
| virtual std::string | info () |
| Write field specific information (in addition to general information such as sizes that are automatically written by this class for all fields. More... | |
| virtual void | any_encode_repeated (Bitset *bits, const std::vector< boost::any > &wire_values) |
| virtual void | any_decode_repeated (Bitset *repeated_bits, std::vector< boost::any > *field_values) |
| virtual void | any_pre_encode_repeated (std::vector< boost::any > *wire_values, const std::vector< boost::any > &field_values) |
| virtual void | any_post_decode_repeated (const std::vector< boost::any > &wire_values, std::vector< boost::any > *field_values) |
| virtual unsigned | any_size_repeated (const std::vector< boost::any > &wire_values) |
| virtual unsigned | max_size_repeated () |
| virtual unsigned | min_size_repeated () |
Detailed Description
template<typename WireType, typename FieldType = WireType>
class dccl::TypedFixedFieldCodec< WireType, FieldType >
Base class for static-typed field encoders/decoders that use a fixed number of bits on the wire regardless of the value of the field. Use TypedFieldCodec if your encoder is variable length. See TypedFieldCodec for an explanation of the template parameters (FieldType and WireType).
Implements TypedFieldCodec::size(const FieldType& field_value), TypedFieldCodec::max_size and TypedFieldCodec::min_size, and provides a virtual zero-argument function for size()
Definition at line 34 of file field_codec_fixed.h.
Member Function Documentation
◆ max_size()
template<typename WireType , typename FieldType = WireType>
|
inlinevirtual |
Calculate maximum size of the field in bits.
- Returns
- Maximum size of this field (in bits).
Implements dccl::FieldCodecBase.
Definition at line 44 of file field_codec_fixed.h.
◆ min_size()
template<typename WireType , typename FieldType = WireType>
|
inlinevirtual |
Calculate minimum size of the field in bits.
- Returns
- Minimum size of this field (in bits).
Implements dccl::FieldCodecBase.
Definition at line 47 of file field_codec_fixed.h.
◆ size()
template<typename WireType , typename FieldType = WireType>
|
inlinevirtual |
Calculate the size (in bits) of a non-empty field.
- Parameters
-
wire_value Value to use when calculating the size of the field. If calculating the size requires encoding the field completely, cache the encoded value for a likely future call to encode() for the same wire_value.
- Returns
- the size (in bits) of the field.
Implements dccl::TypedFieldCodec< WireType, WireType >.
Definition at line 41 of file field_codec_fixed.h.
The documentation for this class was generated from the following file:
- dccl/field_codec_fixed.h
