#include "comms/field/BitmaskValue.h"

Detailed Description

template<typename TFieldBase, typename... TOptions>
class comms::field::BitmaskValue< TFieldBase, TOptions >

Bitmask value field.

Quite often communication protocols specify bitmask values, where any bit has a specific meaning. Although such masks are can be handled as unsigned integer values using comms::field::IntValue field type, using comms::field::Bitmask may be a bit more convenient.

Template Parameters

TFieldBase Base class for this field, expected to be a variant of comms::Field.

TOptions

Zero or more options that modify/refine default behaviour of the field. If no option is provided, the underlying type is assumed to be "unsigned", which is usually 4 bytes long. To redefined the length of the bitmask field, use comms::option::def::FixedLength option. For example:

using MyFieldBase = comms::Field<comms::option::def::BigEndian>;

using MyField =comms::field::EnumValue<MyFieldBase>;

comms::Field

Base class to all the field classes.

Definition: Field.h:33

comms::field::EnumValue

Enumerator value field.

Definition: EnumValue.h:73

The serialised value of the field in the example above will consume sizeof(unsigned) bytes, because the underlying type chosen to be "unsigned" by default. Example below specifies simple bitmask value field with 2 bytes serialisation length:

using MyFieldBase = comms::Field<comms::option::def::BigEndian>;

using MyField =comms::field::EnumValue<MyFieldBase, comms::option::def::FixedLength<2> >;

Supported options are:

See also: COMMS_BITMASK_BITS(); COMMS_BITMASK_BITS_ACCESS(); COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE(); COMMS_BITMASK_BITS_SEQ(); COMMS_BITMASK_BITS_SEQ_NOTEMPLATE()

Inheritance diagram for comms::field::BitmaskValue< TFieldBase, TOptions >:

Public Types
using	CommsTag = tag::Bitmask
	Tag indicating type of the field.

using	Endian = typename BaseImpl::Endian
	Endian used for serialisation.

using	FieldBase = TFieldBase
	Base class provided in the first template parameter.

using	FieldType = typename ParsedOptions::FieldType
	Type of actual extending field specified via comms::option::def::FieldType. More...

using	ParsedOptions = OptionsBundle
	All the options provided to this class bundled into struct.

using	ValueType = typename IntValueField::ValueType
	Type of underlying integral value. More...

using	VersionType = typename BaseImpl::VersionType
	Version type.

Public Member Functions
	BitmaskValue ()=default
	Default constructor. More...

	BitmaskValue (const BitmaskValue &)=default
	Copy constructor.

	BitmaskValue (const ValueType &val)
	Constructor. More...

	~BitmaskValue () noexcept=default
	Destructor.

bool	canWrite () const
	Check of whether the field has a consistent value for writing.

void	clearBits (ValueType mask)
	Set all the provided bits. More...

bool	getBitValue (unsigned bitNum) const
	Get bit value.

int	getForcedLength () const
	Get forced serialization length. More...

const ValueType &	getValue () const
	Get value.

VersionType	getVersion () const
	Get version of the field. More...

bool	hasAllBitsSet (ValueType mask) const
	Check whether all bits from provided mask are set. More...

bool	hasAnyBitsSet (ValueType mask) const
	Check whether any bits from provided mask are set. More...

constexpr std::size_t	length () const
	Get length required to serialise the current field value. More...

BitmaskValue &	operator= (const BitmaskValue &)=default
	Copy assignment.

template<typename TIter >
ErrorStatus	read (TIter &iter, std::size_t size)
	Read field value from input data sequence. More...

template<typename TIter >
void	readNoStatus (TIter &iter)
	Read field value from input data sequence without error check and status report. More...

bool	refresh ()
	Refresh contents of the field. More...

void	setBits (ValueType mask)
	Set all the provided bits. More...

void	setBitValue (unsigned bitNum, bool val)
	Set bit value.

void	setForcedLength (int len)
	Force serialization length of the field. More...

template<typename U >
void	setValue (U &&val)
	Set value.

bool	setVersion (VersionType version)
	Default implementation of version update. More...

constexpr bool	valid () const
	Check validity of the field value.

ValueType &	value ()
	Get access to underlying mask value storage. More...

const ValueType &	value () const
	Get access to underlying mask value storage. More...

template<typename TIter >
ErrorStatus	write (TIter &iter, std::size_t size) const
	Write current field value to output data sequence. More...

template<typename TIter >
void	writeNoStatus (TIter &iter) const
	Write current field value to output data sequence without error check and status report. More...

Static Public Member Functions
static constexpr bool	canWrite ()
	Default check of whether the field has a consistent value for writing. More...

static constexpr bool	hasEmptySerialization ()
	Compile time inquiry of whether comms::option::def::EmptySerialization option has been used.

static constexpr bool	hasFailOnInvalid ()
	Compile time inquiry of whether comms::option::def::FailOnInvalid option has been used.

static constexpr bool	hasFieldType ()
	Compile time inquiry of whether comms::option::def::FieldType option has been used.

static constexpr bool	hasIgnoreInvalid ()
	Compile time inquiry of whether comms::option::def::IgnoreInvalid option has been used.

static constexpr bool	hasNonDefaultRefresh ()
	Compile time check if this class has non-default refresh functionality.

static constexpr bool	hasReadNoStatus ()
	Compile time check of whether the field has proper readNoStatus() member function.

static constexpr bool	hasVarLength ()
	Default check of whether the field has variable length definition via comms::option::def::VarLength option. More...

static constexpr bool	hasWriteNoStatus ()
	Compile time check of whether the field has proper writeNoStatus() member function.

static constexpr bool	isVersionDependent ()
	Compile time check if this class is version dependent.

static constexpr std::size_t	maxLength ()
	Get maximal length that is required to serialise field of this type. More...

static constexpr std::size_t	minLength ()
	Get minimal length that is required to serialise field of this type. More...

static constexpr bool	valid ()
	Default validity check. More...

Static Protected Member Functions
template<typename T , typename TIter >
static T	readData (TIter &iter)
	Read data from input buffer. More...

template<typename T , std::size_t TSize, typename TIter >
static T	readData (TIter &iter)
	Read partial data from input buffer. More...

template<typename T , typename TIter >
static void	writeData (T value, TIter &iter)
	Write data into the output buffer. More...

template<std::size_t TSize, typename T , typename TIter >
static void	writeData (T value, TIter &iter)
	Write partial data into the output buffer. More...

Related Functions
(Note that these are not member functions.)
#define	COMMS_BITMASK_BITS(...) COMMS_DEFINE_ENUM(BitIdx, __VA_ARGS__)
	Provide names for bits in comms::field::BitmaskValue field. More...

#define	COMMS_BITMASK_BITS_ACCESS(...)
	Generate access functions for bits in comms::field::BitmaskValue field. More...

#define	COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE(...) COMMS_DO_BIT_ACC_FUNC((*this), __VA_ARGS__)
	Similar to COMMS_BITMASK_BITS_ACCESS(), but dedicated for non-template classes. More...

#define	COMMS_BITMASK_BITS_SEQ(...)
	Combine usage of COMMS_BITMASK_BITS() and COMMS_BITMASK_BITS_ACCESS(). More...

#define	COMMS_BITMASK_BITS_SEQ_NOTEMPLATE(...)
	Similar to COMMS_BITMASK_BITS_SEQ(), but dedicated for non-template classes. More...

template<typename T >
constexpr bool	isBitmaskValue ()
	Compile time check function of whether a provided type is any variant of comms::field::BitmaskValue. More...

template<typename TFieldBase , typename... TOptions>
bool	operator!= (const BitmaskValue< TFieldBase, TOptions... > &field1, const BitmaskValue< TFieldBase, TOptions... > &field2) noexcept
	Non-equality comparison operator. More...

template<typename TFieldBase , typename... TOptions>
bool	operator< (const BitmaskValue< TFieldBase, TOptions... > &field1, const BitmaskValue< TFieldBase, TOptions... > &field2) noexcept
	Equivalence comparison operator. More...

template<typename TFieldBase , typename... TOptions>
bool	operator== (const BitmaskValue< TFieldBase, TOptions... > &field1, const BitmaskValue< TFieldBase, TOptions... > &field2) noexcept
	Equality comparison operator. More...

template<typename TFieldBase , typename... TOptions>
BitmaskValue< TFieldBase, TOptions... > &	toFieldBase (BitmaskValue< TFieldBase, TOptions... > &field)
	Upcast type of the field definition to its parent comms::field::BitmaskValue type in order to have access to its internal types.

template<typename TFieldBase , typename... TOptions>
const BitmaskValue< TFieldBase, TOptions... > &	toFieldBase (const BitmaskValue< TFieldBase, TOptions... > &field)
	Upcast type of the field definition to its parent comms::field::BitmaskValue type in order to have access to its internal types.

Member Typedef Documentation

◆ FieldType

template<typename TFieldBase , typename... TOptions>

using comms::field::BitmaskValue< TFieldBase, TOptions >::FieldType = typename ParsedOptions::FieldType

Type of actual extending field specified via comms::option::def::FieldType.

void if comms::option::def::FieldType hasn't been applied.

◆ ValueType

template<typename TFieldBase , typename... TOptions>

using comms::field::BitmaskValue< TFieldBase, TOptions >::ValueType = typename IntValueField::ValueType

Type of underlying integral value.

Unsigned integral type, which depends on the length of the mask determined by the comms::option::def::FixedLength option.

Constructor & Destructor Documentation

◆ BitmaskValue() [1/2]

template<typename TFieldBase , typename... TOptions>

comms::field::BitmaskValue< TFieldBase, TOptions >::BitmaskValue ( )

default

Default constructor.

Initial bitmask has all bits cleared (equals 0)

◆ BitmaskValue() [2/2]

template<typename TFieldBase , typename... TOptions>

comms::field::BitmaskValue< TFieldBase, TOptions >::BitmaskValue ( const ValueType & val )

explicit

Constructor.

Parameters

[in] val Value of the field to initialise it with.

Member Function Documentation

◆ canWrite()

template<typename... TOptions>

static constexpr bool comms::Field< TOptions >::canWrite ( )

staticconstexprinherited

Default check of whether the field has a consistent value for writing.

Returns: Always true.

◆ clearBits()

template<typename TFieldBase , typename... TOptions>

void comms::field::BitmaskValue< TFieldBase, TOptions >::clearBits ( ValueType mask )

Set all the provided bits.

Equivalent to

value() &= (~mask);

comms::field::BitmaskValue::value

const ValueType & value() const

Get access to underlying mask value storage.

Definition: BitmaskValue.h:193

Parameters

[in] mask Mask of bits to clear.

◆ getForcedLength()

template<typename TFieldBase , typename... TOptions>

int comms::field::BitmaskValue< TFieldBase, TOptions >::getForcedLength ( ) const

Get forced serialization length.

See also: setForcedLength()

◆ getVersion()

template<typename TFieldBase , typename... TOptions>

VersionType comms::field::BitmaskValue< TFieldBase, TOptions >::getVersion ( ) const

Get version of the field.

Exists only if comms::option::def::VersionStorage option has been provided.

◆ hasAllBitsSet()

template<typename TFieldBase , typename... TOptions>

bool comms::field::BitmaskValue< TFieldBase, TOptions >::hasAllBitsSet ( ValueType mask ) const

Check whether all bits from provided mask are set.

Parameters

[in] mask Mask to check against

Returns: true in case all the bits are set, false otherwise

◆ hasAnyBitsSet()

template<typename TFieldBase , typename... TOptions>

bool comms::field::BitmaskValue< TFieldBase, TOptions >::hasAnyBitsSet ( ValueType mask ) const

Check whether any bits from provided mask are set.

Parameters

[in] mask Mask to check against

Returns: true in case at least one of the bits is set, false otherwise.

◆ hasVarLength()

template<typename... TOptions>

static constexpr bool comms::Field< TOptions >::hasVarLength ( )

staticconstexprinherited

Default check of whether the field has variable length definition via comms::option::def::VarLength option.

Returns: Always false.

◆ length()

template<typename TFieldBase , typename... TOptions>

constexpr std::size_t comms::field::BitmaskValue< TFieldBase, TOptions >::length ( ) const

constexpr

Get length required to serialise the current field value.

Returns: Number of bytes it will take to serialise the field value.

◆ maxLength()

template<typename TFieldBase , typename... TOptions>

static constexpr std::size_t comms::field::BitmaskValue< TFieldBase, TOptions >::maxLength ( )

staticconstexpr

Get maximal length that is required to serialise field of this type.

Returns: Maximal number of bytes required serialise the field value.

◆ minLength()

template<typename TFieldBase , typename... TOptions>

static constexpr std::size_t comms::field::BitmaskValue< TFieldBase, TOptions >::minLength ( )

staticconstexpr

Get minimal length that is required to serialise field of this type.

Returns: Minimal number of bytes required serialise the field value.

◆ read()

template<typename TFieldBase , typename... TOptions>

template<typename TIter >

ErrorStatus comms::field::BitmaskValue< TFieldBase, TOptions >::read	(	TIter &	iter,
		std::size_t	size
	)

Read field value from input data sequence.

Parameters

[in,out]	iter	Iterator to read the data.
[in]	size	Number of bytes available for reading.

Returns: Status of read operation.

Postcondition: Iterator is advanced.

◆ readData() [1/2]

template<typename... TOptions>

template<typename T , typename TIter >

static T comms::Field< TOptions >::readData ( TIter & iter )

staticprotectedinherited

Read data from input buffer.

Use this function to read data from the intput buffer maintained by the caller. The endianness of the data will be as specified in options of the class.

Template Parameters

T	Return type
TIter	Type of input iterator

Parameters

[in,out] iter Input iterator.

Returns: The integral type value.

Precondition: TSize <= sizeof(T); The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

Note: Thread safety: Safe for distinct stream buffers, unsafe otherwise.

◆ readData() [2/2]

template<typename... TOptions>

template<typename T , std::size_t TSize, typename TIter >

static T comms::Field< TOptions >::readData ( TIter & iter )

staticprotectedinherited

Read partial data from input buffer.

Use this function to read data from the intput buffer maintained by the caller. The endianness of the data will be as specified in options of the class.

Template Parameters

T	Return type
TSize	number of bytes to read
TIter	Type of input iterator

Parameters

[in,out] iter Input iterator.

Returns: The integral type value.

Precondition: TSize <= sizeof(T); The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The internal pointer of the stream buffer is advanced.

Note: Thread safety: Safe for distinct stream buffers, unsafe otherwise.

◆ readNoStatus()

template<typename TFieldBase , typename... TOptions>

template<typename TIter >

void comms::field::BitmaskValue< TFieldBase, TOptions >::readNoStatus ( TIter & iter )

Read field value from input data sequence without error check and status report.

Similar to read(), but doesn't perform any correctness checks and doesn't report any failures.

Parameters

[in,out] iter Iterator to read the data.

Postcondition: Iterator is advanced.

◆ refresh()

template<typename TFieldBase , typename... TOptions>

bool comms::field::BitmaskValue< TFieldBase, TOptions >::refresh ( )

Refresh contents of the field.

Returns: true in case the field's value has been updated, false otherwise

◆ setBits()

template<typename TFieldBase , typename... TOptions>

void comms::field::BitmaskValue< TFieldBase, TOptions >::setBits ( ValueType mask )

Set all the provided bits.

Equivalent to

value() |= mask;

Parameters

[in] mask Mask of bits to set.

◆ setForcedLength()

template<typename TFieldBase , typename... TOptions>

void comms::field::BitmaskValue< TFieldBase, TOptions >::setForcedLength ( int len )

Force serialization length of the field.

Available only when comms::option::def::AvailableLengthLimit option is used for field definition.

Parameters

[in]

len

Forced serialization length.

0 means default serialization length determined by the storage type
positive value means limit of the serialization length
negative value means the length is determined by the stored value

◆ setVersion()

template<typename TFieldBase , typename... TOptions>

bool comms::field::BitmaskValue< TFieldBase, TOptions >::setVersion ( VersionType version )

Default implementation of version update.

Returns: true in case the field contents have changed, false otherwise

◆ valid()

template<typename... TOptions>

static constexpr bool comms::Field< TOptions >::valid ( )

staticconstexprinherited

Default validity check.

Always returns true, can be overriden by the derived class

Returns: Always true

◆ value() [1/2]

template<typename TFieldBase , typename... TOptions>

ValueType& comms::field::BitmaskValue< TFieldBase, TOptions >::value ( )

Get access to underlying mask value storage.

Returns: Reference to the underlying stored value.

◆ value() [2/2]

template<typename TFieldBase , typename... TOptions>

const ValueType& comms::field::BitmaskValue< TFieldBase, TOptions >::value ( ) const

Get access to underlying mask value storage.

Returns: Const reference to the underlying stored value.

◆ write()

template<typename TFieldBase , typename... TOptions>

template<typename TIter >

ErrorStatus comms::field::BitmaskValue< TFieldBase, TOptions >::write	(	TIter &	iter,
		std::size_t	size
	)		const

Write current field value to output data sequence.

Parameters

[in,out]	iter	Iterator to write the data.
[in]	size	Maximal number of bytes that can be written.

Returns: Status of write operation.

Postcondition: Iterator is advanced.

◆ writeData() [1/2]

template<typename... TOptions>

template<typename T , typename TIter >

static void comms::Field< TOptions >::writeData	(	T	value,
		TIter &	iter
	)

staticprotectedinherited

Write data into the output buffer.

Use this function to write data to the the buffer maintained by the caller. The endianness of the data will be as specified in the options provided to the class.

Template Parameters

T	Type of the value to write. Must be integral.
Type	of output iterator

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

Note: Thread safety: Safe for distinct buffers, unsafe otherwise.

◆ writeData() [2/2]

template<typename... TOptions>

template<std::size_t TSize, typename T , typename TIter >

static void comms::Field< TOptions >::writeData	(	T	value,
		TIter &	iter
	)

staticprotectedinherited

Write partial data into the output buffer.

Use this function to write partial data to the buffer maintained by the caller. The endianness of the data will be as specified the class options.

Template Parameters

TSize	Length of the value in bytes known in compile time.
T	Type of the value to write. Must be integral.
TIter	Type of output iterator

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: TSize <= sizeof(T); The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

Note: Thread safety: Safe for distinct buffers, unsafe otherwise.

◆ writeNoStatus()

template<typename TFieldBase , typename... TOptions>

template<typename TIter >

void comms::field::BitmaskValue< TFieldBase, TOptions >::writeNoStatus ( TIter & iter ) const

Write current field value to output data sequence without error check and status report.

Similar to write(), but doesn't perform any correctness checks and doesn't report any failures.

Parameters

[in,out] iter Iterator to write the data.

Postcondition: Iterator is advanced.

Friends And Related Function Documentation

◆ COMMS_BITMASK_BITS

template<typename TFieldBase , typename... TOptions>

#define COMMS_BITMASK_BITS ( ... ) COMMS_DEFINE_ENUM(BitIdx, __VA_ARGS__)

Defines BitIdx enum with all the provided values prefixed with "BitIdx_". For example usage of

COMMS_BITMASK_BITS(first, second, third, fourth);

comms::field::BitmaskValue::COMMS_BITMASK_BITS

#define COMMS_BITMASK_BITS(...)

Provide names for bits in comms::field::BitmaskValue field.

Definition: BitmaskValue.h:590

will generate the following enum type:

enum BitIdx
{
    BitIdx_first,
    BitIdx_second,
    BitIdx_third,
    BitIdx_fourth,
    BitIdx_numOfValues
};

NOTE, that provided names first, second, third, and fourth have found their way to the enum BitIdx.
Also note, that there is automatically added BitIdx_numOfValues value to the end of BitIdx enum.

It is possible to assign values to the provided names. It could be useful when skipping some unused bits. For example

COMMS_BITMASK_BITS(first=1, third=3, fourth);

will generate the following enum type:

enum BitIdx
{
    BitIdx_first=1,
    BitIdx_third=3,
    BitIdx_fourth,
    BitIdx_numOfValues
};

The macro COMMS_BITMASK_BITS() should be used inside definition of the bitmask field to provide names for the bits for external use:

struct MyField : public comms::field::BitmaskValue<...>
{
    COMMS_BITMASK_BITS(first, second, third, fourth);
}

Note: Defined in "comms/field/BitmaskValue.h"

◆ COMMS_BITMASK_BITS_ACCESS

template<typename TFieldBase , typename... TOptions>

#define COMMS_BITMASK_BITS_ACCESS ( ... )

    COMMS_AS_BITMASK_FUNC { \
        return comms::field::toFieldBase(*this); \
    }\
    COMMS_AS_BITMASK_CONST_FUNC { \
        return comms::field::toFieldBase(*this); \
    } \
    COMMS_DO_BIT_ACC_FUNC(asBitmask(), __VA_ARGS__)

Generate access functions for bits in comms::field::BitmaskValue field.

The COMMS_BITMASK_BITS() macro defines BitIdx enum to be able to access internal bits. However, an ability to provide values to the enumeration values using =val suffixes doesn't allow generation of convenience access functions to the bits. That's why COMMS_BITMASK_BITS_ACCESS() macro was introduced. For every name listed in the parameters list, getBitValue_*() and setBitValue_*() functions will be generated. For example, having the following definition

struct MyField : public comms::field::BitmaskValue<...>
{
    ...
    COMMS_BITMASK_BITS_ACCESS(first, third, fourth);
}

is equivalent to having following functions defined:

struct MyField : public comms::field::BitmaskValue<...>
{
    ...
    bool getBitValue_first() const {
        return getBitValue(BitIdx_first);
    }
 
    void setBitValue_first(bool value) {
        setBitValue(BitIdx_first, value);
    }
 
    bool getBitValue_third() const {
        return getBitValue(BitIdx_third);
    }
 
    void setBitValue_third(bool value) {
        setBitValue(BitIdx_third, value);
    }
 
    bool getBitValue_fourth() const {
        return getBitValue(BitIdx_fourth);
    }
 
    void setBitValue_fourth(bool value) {
        setBitValue(BitIdx_fourth, value);
    }
}

NOTE, that generated getBitValue_*() and setBitValue_*() functions use BitIdx_* enum values generated by COMMS_BITMASK_BITS(). It means that COMMS_BITMASK_BITS_ACCESS() macro can NOT be used without COMMS_BITMASK_BITS().

struct MyField : public comms::field::BitmaskValue<...>
{
    COMMS_BITMASK_BITS(first, third=2, fourth);
    COMMS_BITMASK_BITS_ACCESS(first, third, fourth);
}

Precondition: Must be used together with COMMS_BITMASK_BITS()

Warning: Some compilers, such as clang or early versions of g++ may have problems compiling code generated by this macro even though it uses valid C++11 constructs in attempt to automatically identify the type of the base class. If the compilation fails, and this macro resides inside a NON-template class, please use COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE() macro instead. In case this macro needs to reside inside a template class, then there is a need to define inner Base type, which specifies exact type of the comms::field::BitmaskValue class. For example:
using MyFieldBase = comms::Field<comms::option::BigEndian>;

template <typename... TExtraOptions>

class MyField : public

comms::field::BitmaskValue<

MyFieldBase,

comms::field::FixedLength<1>,

comms::field::BitmaskReservedBits<0xf2, 0>,

TExtraOptions...

>

{

// Duplicate definition of the base class

using Base =

comms::field::BitmaskValue<

MyFieldBase,

comms::field::FixedLength<1>,

scomms::field::BitmaskReservedBits<0xf2, 0>,

TExtraOptions...

>;

public:

COMMS_BITMASK_BITS(first, third=2, fourth);

COMMS_BITMASK_BITS_ACCESS(first, third, fourth);

}

Note: Defined in "comms/field/BitmaskValue.h"

◆ COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE

template<typename TFieldBase , typename... TOptions>

#define COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE ( ... ) COMMS_DO_BIT_ACC_FUNC((*this), __VA_ARGS__)

The COMMS_BITMASK_BITS_ACCESS() macro is a generic one, which can be used in any class (template, or non-template). However, some compilers (such as g++-4.9 and below, clang-4.0 and below) may fail to compile it even though it uses valid C++11 constructs. If the compilation fails and the class it is being used in is NOT a template one, please use COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE() instead.

◆ COMMS_BITMASK_BITS_SEQ

template<typename TFieldBase , typename... TOptions>

#define COMMS_BITMASK_BITS_SEQ ( ... )

COMMS_BITMASK_BITS(__VA_ARGS__) \

COMMS_BITMASK_BITS_ACCESS(__VA_ARGS__)

Combine usage of COMMS_BITMASK_BITS() and COMMS_BITMASK_BITS_ACCESS().

When assigned bit names start at bit 0 and go sequentially without any gaps in the middle, i.e. don't have any =val suffixes, then use COMMS_BITMASK_BITS_SEQ() macro to name the bits. It is defined to use COMMS_BITMASK_BITS() and COMMS_BITMASK_BITS_ACCESS() with the same bit names. For example

struct MyField : public comms::field::BitmaskValue<...>
{
    COMMS_BITMASK_BITS_SEQ(first, second, third, fourth);
}

is equivalent to having

struct MyField : public comms::field::BitmaskValue<...>
{
    enum BitIdx
    {
        BitIdx_first,
        BitIdx_second,
        BitIdx_third,
        BitIdx_fourth,
        BitIdx_numOfValues
    }
 
    bool getBitValue_first() const {...}
    void setBitValue_first(bool value) {...}
    bool getBitValue_second() const {...}
    void setBitValue_second(bool value) {...}
    bool getBitValue_third() const {...}
    void setBitValue_third(bool value) {...}
    bool getBitValue_fourth() const {...}
    void setBitValue_fourth(bool value) {...}
};

Warning: Some compilers, such as clang or early versions of g++ may have problems compiling code generated by this macro even though it uses valid C++11 constructs in attempt to automatically identify the type of the base class. If the compilation fails, and this macro resides inside a NON-template class, please use COMMS_BITMASK_BITS_SEQ_NOTEMPLATE() macro instead. In case this macro needs to reside inside a template class, then there is a need to define inner Base type, which specifies exact type of the comms::field::BitmaskValue class. For example:
using MyFieldBase = comms::Field<comms::option::BigEndian>;

template <typename... TExtraOptions>

class MyField : public

comms::field::BitmaskValue<

MyFieldBase,

comms::field::FixedLength<1>,

comms::field::BitmaskReservedBits<0xf0, 0>,

TExtraOptions...

>

{

// Duplicate definition of the base class

using Base =

comms::field::BitmaskValue<

MyFieldBase,

comms::field::FixedLength<1>,

scomms::field::BitmaskReservedBits<0xf0, 0>,

TExtraOptions...

>;

public:

COMMS_BITMASK_BITS_SEQ(first, second, third, fourth);

}

Note: Defined in "comms/field/BitmaskValue.h"

◆ COMMS_BITMASK_BITS_SEQ_NOTEMPLATE

template<typename TFieldBase , typename... TOptions>

#define COMMS_BITMASK_BITS_SEQ_NOTEMPLATE ( ... )

COMMS_BITMASK_BITS(__VA_ARGS__) \

COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE(__VA_ARGS__)

Similar to COMMS_BITMASK_BITS_SEQ(), but dedicated for non-template classes.

The COMMS_BITMASK_BITS_SEQ() macro is a generic one, which can be used in any class (template, or non-template). However, some compilers (such as g++-4.9 and below, clang-4.0 and below) may fail to compile it even though it uses valid C++11 constructs. If the compilation fails and the class it is being used in is NOT a template one, please use COMMS_BITMASK_BITS_SEQ_NOTEMPLATE() instead.

Note: Defined in "comms/field/BitmaskValue.h"

◆ isBitmaskValue()

template<typename T >

constexpr bool isBitmaskValue ( )

Template Parameters

T Any type.

Returns: true in case provided type is any variant of BitmaskValue

◆ operator!=()

template<typename TFieldBase , typename... TOptions>

bool operator!=	(	const BitmaskValue< TFieldBase, TOptions... > &	field1,
		const BitmaskValue< TFieldBase, TOptions... > &	field2
	)

Parameters

[in]	field1	First field.
[in]	field2	Second field.

Returns: true in case fields are NOT equal, false otherwise.

◆ operator<()

template<typename TFieldBase , typename... TOptions>

bool operator<	(	const BitmaskValue< TFieldBase, TOptions... > &	field1,
		const BitmaskValue< TFieldBase, TOptions... > &	field2
	)

Parameters

[in]	field1	First field.
[in]	field2	Second field.

Returns: true in case value of the first field is lower than than the value of the second.

◆ operator==()

template<typename TFieldBase , typename... TOptions>

bool operator==	(	const BitmaskValue< TFieldBase, TOptions... > &	field1,
		const BitmaskValue< TFieldBase, TOptions... > &	field2
	)

Parameters

[in]	field1	First field.
[in]	field2	Second field.

Returns: true in case fields are equal, false otherwise.

The documentation for this class was generated from the following file:

include/comms/field/BitmaskValue.h

Detailed Description

template<typename TFieldBase, typename... TOptions> class comms::field::BitmaskValue< TFieldBase, TOptions >

Public Types

Public Member Functions

Static Public Member Functions

Static Protected Member Functions

Related Functions

Member Typedef Documentation

◆ FieldType

◆ ValueType

Constructor & Destructor Documentation

◆ BitmaskValue() [1/2]

◆ BitmaskValue() [2/2]

Member Function Documentation

◆ canWrite()

◆ clearBits()

◆ getForcedLength()

◆ getVersion()

◆ hasAllBitsSet()

◆ hasAnyBitsSet()

◆ hasVarLength()

◆ length()

◆ maxLength()

◆ minLength()

◆ read()

◆ readData() [1/2]

◆ readData() [2/2]

◆ readNoStatus()

◆ refresh()

◆ setBits()

◆ setForcedLength()

◆ setVersion()

◆ valid()

◆ value() [1/2]

◆ value() [2/2]

◆ write()

◆ writeData() [1/2]

◆ writeData() [2/2]

◆ writeNoStatus()

Friends And Related Function Documentation

◆ COMMS_BITMASK_BITS

◆ COMMS_BITMASK_BITS_ACCESS

◆ COMMS_BITMASK_BITS_ACCESS_NOTEMPLATE

◆ COMMS_BITMASK_BITS_SEQ

◆ COMMS_BITMASK_BITS_SEQ_NOTEMPLATE

◆ isBitmaskValue()

◆ operator!=()

◆ operator<()

◆ operator==()

template<typename TFieldBase, typename... TOptions>
class comms::field::BitmaskValue< TFieldBase, TOptions >