buffer_copy (20 of 30 overloads)

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_buffer & target,
    const ConstBufferSequence & source,
    std::size_t max_bytes_to_copy);

Parameters

target: A modifiable buffer representing the memory region to which the bytes will be copied.
source: A non-modifiable buffer sequence representing the memory regions from which the bytes will be copied.
max_bytes_to_copy: The maximum number of bytes to be copied.

Return Value

The number of bytes copied.

Remarks

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.