couchbase::codec::codec_flags Namespace Reference

Enumerations
enum class	common_flags : std::uint32_t {   reserved = 0x00 , client_specific = 0x01 , json = 0x02 , binary = 0x03 ,   string = 0x04 }

Functions
constexpr auto	create_common_flags (common_flags flags) -> std::uint32_t
	Takes a enum representation of common flags and moves them to the common flags MSBs.
constexpr auto	extract_common_flags (std::uint32_t flags) -> common_flags
	Returns only the common flags from the full flags.
constexpr auto	has_common_flags (std::uint32_t flags) -> bool
	Checks whether the upper 8 bits are set, indicating common flags presence.
constexpr auto	has_common_flags (std::uint32_t flags, std::uint32_t expected_common_flag) -> bool
	Checks that flags has common flags bits set and that they correspond to expected common flags format.
constexpr auto	has_common_flags (std::uint32_t flags, common_flags expected_common_flag) -> bool
	Checks that flags has common flags bits set and that they correspond to expected common flags value.
constexpr auto	has_compression_flags (std::uint32_t flags) -> bool
	Checks whether the upper 3 bits are set, indicating compression presence.

Variables
constexpr std::uint32_t	common_format_mask = 0x0F000000
	32bit flag is composed of:
constexpr std::uint32_t	private_common_flags = create_common_flags(common_flags::client_specific)
constexpr std::uint32_t	json_common_flags = create_common_flags(common_flags::json)
constexpr std::uint32_t	binary_common_flags = create_common_flags(common_flags::binary)
constexpr std::uint32_t	string_common_flags = create_common_flags(common_flags::string)

Enumeration Type Documentation

common_flags

enum class common_flags : std::uint32_t

strong

Enumerator
reserved
client_specific
json
binary
string

Function Documentation

create_common_flags()

constexpr auto create_common_flags ( common_flags flags ) -> std::uint32_t

constexpr

Takes a enum representation of common flags and moves them to the common flags MSBs.

Parameters

flags

the flags to shift.

Returns

an integer having the common flags set.

extract_common_flags()

constexpr auto extract_common_flags ( std::uint32_t flags ) -> common_flags

constexpr

Returns only the common flags from the full flags.

Note

it returns common_flags::reserved for unknown flags structure.

Parameters

flags

the flags to check.

Returns

only the common flags simple representation (8 bits).

has_common_flags() [1/3]

constexpr auto has_common_flags ( std::uint32_t flags ) -> bool

constexpr

Checks whether the upper 8 bits are set, indicating common flags presence.

It does this by shifting bits to the right until only the most significant bits are remaining and then checks if one of them is set.

Parameters

flags

the flags to check.

Returns

true if set, false otherwise.

has_common_flags() [2/3]

constexpr auto has_common_flags ( std::uint32_t flags, common_flags expected_common_flag ) -> bool

constexpr

Checks that flags has common flags bits set and that they correspond to expected common flags value.

Parameters

flags	the 32 bits flags to check
expected_common_flag	the expected common flags enum value

Returns

true if common flags bits are set and correspond to expected_common_flag format

has_common_flags() [3/3]

constexpr auto has_common_flags ( std::uint32_t flags, std::uint32_t expected_common_flag ) -> bool

constexpr

Checks that flags has common flags bits set and that they correspond to expected common flags format.

Parameters

flags	the 32 bits flags to check
expected_common_flag	the expected common flags format bits

Returns

true if common flags bits are set and correspond to expected_common_flag format

has_compression_flags()

constexpr auto has_compression_flags ( std::uint32_t flags ) -> bool

constexpr

Checks whether the upper 3 bits are set, indicating compression presence.

It does this by shifting bits to the right until only the most significant bits are remaining and then checks if one of them is set.

Parameters

flags

the flags to check.

Returns

true if compression set, false otherwise.

Variable Documentation

binary_common_flags

constexpr std::uint32_t binary_common_flags = create_common_flags(common_flags::binary)

constexpr

common_format_mask

constexpr std::uint32_t common_format_mask = 0x0F000000

constexpr

32bit flag is composed of:

• 3 compression bits
• 1 bit reserved for future use
• 4 format flags bits. those 8 upper bits make up the common flags
• 8 bits reserved for future use
• 16 bits for legacy flags

This mask allows to compare a 32 bits flags with the 4 common flag format bits ("00001111 00000000 00000000 00000000").

See also

extract_common_flags()

has_common_flags()

has_compression_flags()

json_common_flags

constexpr std::uint32_t json_common_flags = create_common_flags(common_flags::json)

constexpr

private_common_flags

constexpr std::uint32_t private_common_flags = create_common_flags(common_flags::client_specific)

constexpr

string_common_flags

constexpr std::uint32_t string_common_flags = create_common_flags(common_flags::string)

constexpr