This class represents a CRC‐64 checksum value that can be updated as data is provided.

Synopsis

Declared in <bdlde_crc64.h>

class Crc64;

Description

More generally, this class supports a complete set of value semantic operations, including copy construction, assignment, equality comparison, ostream printing, and bdex serialization. (A precise operational definition of when two objects have the same value can be found in the description of operator== for the class.) This class is exception neutral with no guarantee of rollback: if an exception is thrown during the invocation of a method on a pre‐existing object, the class is left in a valid state, but its value is undefined. In no event is memory leaked. Finally, aliasing (e.g., using all or part of an object as both source and destination) is supported in all cases.

Member Functions

Name

Description

Crc64 [constructor]

Constructors

operator=

Assign to this checksum the value of the specified rhs checksum, and return a reference to this modifiable checksum.

bdexStreamIn

Assign to this object the value read from the specified stream.

bdexStreamOut

Write this value to the specified output stream.

checksum

Return the current value of this checksum.

checksumAndReset

Return the current value of this checksum and set the value of this checksum to the value the default constructor provides.

print

Format this object to the specified output stream.

reset

Reset the value of this checksum to the value the default constructor provides.

update

Update this checksum to incorporate the specified data.

Static Member Functions

Name

Description

maxSupportedBdexVersion

Return the maximum valid BDEX format version for bdexStreamOut.

Friends

Name

Description

BloombergLP::bdlde::operator==

Return true if the specified lhs and rhs checksums have the same value.

Non-Member Functions

Name

Description

operator!=

Return true if the specified lhs and rhs checksums do not have the same value.

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