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The asio::buffer_copy function is used to copy bytes
from a source buffer (or buffer sequence) to a target buffer (or buffer sequence).
std::size_t buffer_copy( const mutable_buffer & target, const const_buffer & source); » more... std::size_t buffer_copy( const mutable_buffer & target, const const_buffers_1 & source); » more... std::size_t buffer_copy( const mutable_buffer & target, const mutable_buffer & source); » more... std::size_t buffer_copy( const mutable_buffer & target, const mutable_buffers_1 & source); » more... template< typename ConstBufferSequence> std::size_t buffer_copy( const mutable_buffer & target, const ConstBufferSequence & source, typename enable_if< is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const const_buffer & source); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const const_buffers_1 & source); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const mutable_buffer & source); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const mutable_buffers_1 & source); » more... template< typename ConstBufferSequence> std::size_t buffer_copy( const mutable_buffers_1 & target, const ConstBufferSequence & source, typename enable_if< is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const const_buffer & source, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const const_buffers_1 & source, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const mutable_buffer & source, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const mutable_buffers_1 & source, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence, typename ConstBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const ConstBufferSequence & source, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value &&is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » more... std::size_t buffer_copy( const mutable_buffer & target, const const_buffer & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffer & target, const const_buffers_1 & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffer & target, const mutable_buffer & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffer & target, const mutable_buffers_1 & source, std::size_t max_bytes_to_copy); » more... template< typename ConstBufferSequence> std::size_t buffer_copy( const mutable_buffer & target, const ConstBufferSequence & source, std::size_t max_bytes_to_copy, typename enable_if< is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const const_buffer & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const const_buffers_1 & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const mutable_buffer & source, std::size_t max_bytes_to_copy); » more... std::size_t buffer_copy( const mutable_buffers_1 & target, const mutable_buffers_1 & source, std::size_t max_bytes_to_copy); » more... template< typename ConstBufferSequence> std::size_t buffer_copy( const mutable_buffers_1 & target, const ConstBufferSequence & source, std::size_t max_bytes_to_copy, typename enable_if< is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const const_buffer & source, std::size_t max_bytes_to_copy, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const const_buffers_1 & source, std::size_t max_bytes_to_copy, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const mutable_buffer & source, std::size_t max_bytes_to_copy, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const mutable_buffers_1 & source, std::size_t max_bytes_to_copy, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0); » more... template< typename MutableBufferSequence, typename ConstBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const ConstBufferSequence & source, std::size_t max_bytes_to_copy, typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value &&is_const_buffer_sequence< ConstBufferSequence >::value >::type * = 0); » 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.
Header: asio/buffer.hpp
Convenience header: asio.hpp