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Copies a limited number of bytes from a source buffer sequence to a target buffer.
template< typename ConstBufferSequence> std::size_t buffer_copy( const mutable_buffers_1 & target, const ConstBufferSequence & source, std::size_t max_bytes_to_copy);
A modifiable buffer representing the memory region to which the bytes will be copied.
A non-modifiable buffer sequence representing the memory regions from which the bytes will be copied.
The maximum number of bytes to be copied.
The number of bytes copied.
The number of bytes copied is the lesser of:
buffer_size(target)
buffer_size(source)
max_bytes_to_copy
This function is implemented in terms of memcpy,
and consequently it cannot be used to copy between overlapping memory regions.