|
The std::experimental::net::v1::buffer_copy
function is used to copy bytes from a source buffer (or buffer sequence)
to a target buffer (or buffer sequence).
template< typename MutableBufferSequence, typename ConstBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const ConstBufferSequence & source); » more... template< typename MutableBufferSequence, typename ConstBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const ConstBufferSequence & source, std::size_t max_bytes_to_copy); » more...
The buffer_copy function
is available in two forms:
buffer_copy(target, source)
buffer_copy(target, source, max_bytes_to_copy)
Both forms return the number of bytes actually copied. The number of bytes copied is the lesser of:
buffer_size(target)
buffer_size(source)
If specified, max_bytes_to_copy.
This prevents buffer overflow, regardless of the buffer sizes used in the copy operation.
Note that buffer_copy is implemented in terms
of memcpy, and consequently
it cannot be used to copy between overlapping memory regions.