rename of aux::array_view to span (#933)

include/libtorrent/Makefile.am

@@ -149,8 +149,8 @@ nobase_include_HEADERS = \
   web_connection_base.hpp      \
   web_peer_connection.hpp      \
   xml_parse.hpp                \
+  span.hpp                     \
   \
-  aux_/array_view.hpp               \
   aux_/allocating_handler.hpp       \
   aux_/bind_to_device.hpp           \
   aux_/cpuid.hpp                    \

include/libtorrent/aux_/io.hpp

@@ -36,7 +36,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <cstdint>
 #include <string>
 #include <algorithm> // for copy
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 namespace libtorrent { namespace aux
 {
@@ -47,7 +47,7 @@ namespace libtorrent { namespace aux
 	// it to native endianess
 	template <class T, class Byte>
 	inline typename std::enable_if<sizeof(Byte)==1, T>::type
-	read_impl(array_view<Byte>& view, type<T>)
+	read_impl(span<Byte>& view, type<T>)
 	{
 		T ret = 0;
 		for (int i = 0; i < int(sizeof(T)); ++i)
@@ -61,7 +61,7 @@ namespace libtorrent { namespace aux
 
 	template <class T, class Byte>
 	inline typename std::enable_if<sizeof(Byte)==1, void>::type
-	write_impl(T val, array_view<Byte>& view)
+	write_impl(T val, span<Byte>& view)
 	{
 		int shift = int(sizeof(T)) * 8;
 		for (int i = 0; i < int(sizeof(T)); ++i)
@@ -75,78 +75,78 @@ namespace libtorrent { namespace aux
 	// -- adaptors
 
 	template <typename Byte>
-	std::int64_t read_int64(array_view<Byte>& view)
+	std::int64_t read_int64(span<Byte>& view)
 	{ return read_impl(view, type<std::int64_t>()); }
 
 	template <typename Byte>
-	std::uint64_t read_uint64(array_view<Byte>& view)
+	std::uint64_t read_uint64(span<Byte>& view)
 	{ return read_impl(view, type<std::uint64_t>()); }
 
 	template <typename Byte>
-	std::uint32_t read_uint32(array_view<Byte>& view)
+	std::uint32_t read_uint32(span<Byte>& view)
 	{ return read_impl(view, type<std::uint32_t>()); }
 
 	template <typename Byte>
-	std::int32_t read_int32(array_view<Byte>& view)
+	std::int32_t read_int32(span<Byte>& view)
 	{ return read_impl(view, type<std::int32_t>()); }
 
 	template <typename Byte>
-	std::int16_t read_int16(array_view<Byte>& view)
+	std::int16_t read_int16(span<Byte>& view)
 	{ return read_impl(view, type<std::int16_t>()); }
 
 	template <typename Byte>
-	std::uint16_t read_uint16(array_view<Byte>& view)
+	std::uint16_t read_uint16(span<Byte>& view)
 	{ return read_impl(view, type<std::uint16_t>()); }
 
 	template <typename Byte>
-	std::int8_t read_int8(array_view<Byte>& view)
+	std::int8_t read_int8(span<Byte>& view)
 	{ return read_impl(view, type<std::int8_t>()); }
 
 	template <typename Byte>
-	std::uint8_t read_uint8(array_view<Byte>& view)
+	std::uint8_t read_uint8(span<Byte>& view)
 	{ return read_impl(view, type<std::uint8_t>()); }
 
 
 	template <typename Byte>
-	void write_uint64(std::uint64_t val, array_view<Byte>& view)
+	void write_uint64(std::uint64_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_int64(std::int64_t val, array_view<Byte>& view)
+	void write_int64(std::int64_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_uint32(std::uint32_t val, array_view<Byte>& view)
+	void write_uint32(std::uint32_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_int32(std::int32_t val, array_view<Byte>& view)
+	void write_int32(std::int32_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_uint16(std::uint16_t val, array_view<Byte>& view)
+	void write_uint16(std::uint16_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_int16(std::int16_t val, array_view<Byte>& view)
+	void write_int16(std::int16_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_uint8(std::uint8_t val, array_view<Byte>& view)
+	void write_uint8(std::uint8_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template <typename Byte>
-	void write_int8(std::int8_t val, array_view<Byte>& view)
+	void write_int8(std::int8_t val, span<Byte>& view)
 	{ write_impl(val, view); }
 
 	template<typename Byte>
-	inline int write_string(std::string const& str, array_view<Byte>& view)
+	inline int write_string(std::string const& str, span<Byte>& view)
 	{
 		int const len = int(str.size());
 		for (int i = 0; i < len; ++i)
 			view[i] = str[i];
 
-		view = array_view<Byte>(view.data() + len, int(view.size()) - len);
+		view = span<Byte>(view.data() + len, int(view.size()) - len);
 		return len;
 	}
 

include/libtorrent/aux_/session_impl.hpp

@@ -1025,13 +1025,13 @@ namespace libtorrent
 
 			void send_udp_packet_hostname(char const* hostname
 				, int port
-				, array_view<char const> p
+				, span<char const> p
 				, error_code& ec
 				, int flags);
 
 			void send_udp_packet(bool ssl
 				, udp::endpoint const& ep
-				, array_view<char const> p
+				, span<char const> p
 				, error_code& ec
 				, int flags);
 

include/libtorrent/bt_peer_connection.hpp

@@ -161,8 +161,8 @@ namespace libtorrent
 #if !defined(TORRENT_DISABLE_ENCRYPTION) && !defined(TORRENT_DISABLE_EXTENSIONS)
 		// next_barrier, buffers-to-prepend
 		virtual
-		std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+		std::tuple<int, span<boost::asio::const_buffer>>
-		hit_send_barrier(aux::array_view<boost::asio::mutable_buffer> iovec) override;
+		hit_send_barrier(span<boost::asio::mutable_buffer> iovec) override;
 #endif
 
 		virtual void get_specific_peer_info(peer_info& p) const override;

include/libtorrent/buffer.hpp

@@ -40,7 +40,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "libtorrent/invariant_check.hpp"
 #include "libtorrent/assert.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #if defined __GLIBC__
 #include <malloc.h>
@@ -166,7 +166,7 @@ public:
 
 	// allocate an uninitialized buffer of the specified size
 	// and copy the initialization range into the start of the buffer
-	buffer(std::size_t const size, aux::array_view<char const> initialize)
+	buffer(std::size_t const size, span<char const> initialize)
 		: buffer(size)
 	{
 		TORRENT_ASSERT(initialize.size() <= size);
@@ -210,10 +210,10 @@ public:
 	buffer::const_interval data() const
 	{ return interval(m_begin, m_begin + m_size); }
 
-	operator aux::array_view<char>()
+	operator span<char>()
-	{ return aux::array_view<char>(m_begin, int(m_size)); }
+	{ return span<char>(m_begin, int(m_size)); }
-	operator aux::array_view<char const>() const
+	operator span<char const>() const
-	{ return aux::array_view<char const>(m_begin, int(m_size)); }
+	{ return span<char const>(m_begin, int(m_size)); }
 
 	std::size_t size() const { return m_size; }
 

include/libtorrent/entry.hpp

@@ -71,7 +71,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "libtorrent/assert.hpp"
 #include "libtorrent/error_code.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 namespace libtorrent
 {
@@ -116,7 +116,7 @@ namespace libtorrent
 		// The content of the argument is copied into the
 		// newly constructed entry
 		entry(dictionary_type);
-		entry(aux::array_view<char const>);
+		entry(span<char const>);
 		template <typename U, typename = typename std::enable_if<
 			std::is_same<U, entry::string_type>::value
 			|| std::is_same<U, char const*>::value >::type>
@@ -160,7 +160,7 @@ namespace libtorrent
 		entry& operator=(entry const&);
 		entry& operator=(entry&&);
 		entry& operator=(dictionary_type);
-		entry& operator=(aux::array_view<char const>);
+		entry& operator=(span<char const>);
 		template <typename U, typename = typename std::enable_if<
 			std::is_same<U, entry::string_type>::value
 			|| std::is_same<U, char const*>::value >::type>

include/libtorrent/extensions.hpp

@@ -174,7 +174,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/error_code.hpp"
 #include "libtorrent/session_handle.hpp"
 #include "libtorrent/peer_connection_handle.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 namespace libtorrent
 {
@@ -509,8 +509,8 @@ namespace libtorrent
 		// send buffer, must be owned by the crypto plugin and guaranteed to stay
 		// alive until the crypto_plugin is destructed or this function is called
 		// again.
-		virtual std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+		virtual std::tuple<int, span<boost::asio::const_buffer>>
-		encrypt(aux::array_view<boost::asio::mutable_buffer> /*send_vec*/) = 0;
+		encrypt(span<boost::asio::mutable_buffer> /*send_vec*/) = 0;
 
 		// decrypt the provided buffers.
 		// consume is set to the number of bytes which should be trimmed from the
@@ -521,7 +521,7 @@ namespace libtorrent
 		//
 		// packet_size is set to the minimum number of bytes which must be read to
 		// advance the next step of decryption. default is 0
-		virtual void decrypt(aux::array_view<boost::asio::mutable_buffer> /*receive_vec*/
+		virtual void decrypt(span<boost::asio::mutable_buffer> /*receive_vec*/
 			, int& /* consume */, int& /*produce*/, int& /*packet_size*/) = 0;
 	};
 }

include/libtorrent/hasher.hpp

@@ -37,7 +37,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/peer_id.hpp"
 #include "libtorrent/config.hpp"
 #include "libtorrent/assert.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #include <cstdint>
 
@@ -87,12 +87,12 @@ namespace libtorrent
 		// this is the same as default constructing followed by a call to
 		// ``update(data, len)``.
 		hasher(char const* data, int len);
-		hasher(aux::array_view<char const> data);
+		hasher(span<char const> data);
 		hasher(hasher const&);
 		hasher& operator=(hasher const&);
 
 		// append the following bytes to what is being hashed
-		hasher& update(aux::array_view<char const> data);
+		hasher& update(span<char const> data);
 		hasher& update(char const* data, int len);
 
 		// returns the SHA-1 digest of the buffers previously passed to

include/libtorrent/kademlia/dht_tracker.hpp

@@ -51,7 +51,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/udp_socket.hpp"
 #include "libtorrent/socket.hpp"
 #include "libtorrent/deadline_timer.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 namespace libtorrent
 {
@@ -71,7 +71,7 @@ namespace libtorrent { namespace dht
 		, boost::enable_shared_from_this<dht_tracker>
 	{
 		typedef boost::function<void(udp::endpoint const&
-			, aux::array_view<char const>, error_code&, int)> send_fun_t;
+			, span<char const>, error_code&, int)> send_fun_t;
 
 		dht_tracker(dht_observer* observer
 			, io_service& ios

include/libtorrent/pe_crypto.hpp

@@ -46,7 +46,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/sha1_hash.hpp"
 #include "libtorrent/extensions.hpp"
 #include "libtorrent/assert.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #include <list>
 #include <array>
@@ -99,8 +99,8 @@ namespace libtorrent
 
 	struct encryption_handler
 	{
-		std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+		std::tuple<int, span<boost::asio::const_buffer>>
-		encrypt(aux::array_view<boost::asio::mutable_buffer> iovec);
+		encrypt(span<boost::asio::mutable_buffer> iovec);
 
 		int decrypt(crypto_receive_buffer& recv_buffer
 			, std::size_t& bytes_transferred);
@@ -144,10 +144,10 @@ namespace libtorrent
 		void set_incoming_key(unsigned char const* key, int len) override;
 		void set_outgoing_key(unsigned char const* key, int len) override;
 
-		std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+		std::tuple<int, span<boost::asio::const_buffer>>
-		encrypt(aux::array_view<boost::asio::mutable_buffer> buf) override;
+		encrypt(span<boost::asio::mutable_buffer> buf) override;
 
-		void decrypt(aux::array_view<boost::asio::mutable_buffer> buf
+		void decrypt(span<boost::asio::mutable_buffer> buf
 			, int& consume
 			, int& produce
 			, int& packet_size) override;

include/libtorrent/peer_connection.hpp

@@ -61,7 +61,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/receive_buffer.hpp"
 #include "libtorrent/aux_/allocating_handler.hpp"
 #include "libtorrent/debug.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #include <ctime>
 #include <algorithm>
@@ -749,11 +749,11 @@ namespace libtorrent
 		void send_piece_suggestions(int num);
 
 		virtual
-		std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+		std::tuple<int, span<boost::asio::const_buffer>>
-		hit_send_barrier(aux::array_view<boost::asio::mutable_buffer> /* iovec */)
+		hit_send_barrier(span<boost::asio::mutable_buffer> /* iovec */)
 		{
 			return std::make_tuple(INT_MAX
-				, aux::array_view<boost::asio::const_buffer>());
+				, span<boost::asio::const_buffer>());
 		}
 
 		void attach_to_torrent(sha1_hash const& ih);

include/libtorrent/span.hpp

@@ -30,39 +30,39 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
-#ifndef TORRENT_ARRAY_VIEW_HPP_INCLUDED
+#ifndef TORRENT_SPAN_HPP_INCLUDED
-#define TORRENT_ARRAY_VIEW_HPP_INCLUDED
+#define TORRENT_SPAN_HPP_INCLUDED
 
 #include <vector>
 #include <array>
 #include <type_traits> // for std::is_convertible
 #include "libtorrent/assert.hpp"
 
-namespace libtorrent { namespace aux {
+namespace libtorrent
-
+{
 	template <typename T>
-	struct array_view
+	struct span
 	{
-		array_view() : m_ptr(nullptr), m_len(0) {}
+		span() : m_ptr(nullptr), m_len(0) {}
 
 		template <typename U>
-		array_view(array_view<U> const& v)
+		span(span<U> const& v)
 			: m_ptr(v.data()), m_len(v.size()) {}
 
-		array_view(T& p) : m_ptr(&p), m_len(1) {}
+		span(T& p) : m_ptr(&p), m_len(1) {}
-		array_view(T* p, size_t l) : m_ptr(p), m_len(l) {}
+		span(T* p, size_t l) : m_ptr(p), m_len(l) {}
 
 		template <typename U, size_t N>
-		array_view(std::array<U, N>& arr)
+		span(std::array<U, N>& arr)
 			: m_ptr(arr.data()), m_len(arr.size()) {}
 
 		template <typename U, size_t N>
-		array_view(U (&arr)[N])
+		span(U (&arr)[N])
 			: m_ptr(&arr[0]), m_len(N) {}
 
 		// anything with a .data() member function is considered a container
 		template <typename Cont, typename = decltype(std::declval<Cont>().data())>
-		array_view(Cont& c)
+		span(Cont& c)
 			: m_ptr(c.data()), m_len(c.size()) {}
 
 		size_t size() const { return m_len; }
@@ -80,19 +80,19 @@ namespace libtorrent { namespace aux {
 		T& front() const { TORRENT_ASSERT(m_len > 0); return m_ptr[0]; }
 		T& back() const { TORRENT_ASSERT(m_len > 0); return m_ptr[m_len-1]; }
 
-		array_view<T> first(size_t const n) const
+		span<T> first(size_t const n) const
 		{
 			TORRENT_ASSERT(size() >= n);
 			return { data(), size() - n };
 		}
 
-		array_view<T> last(size_t const n) const
+		span<T> last(size_t const n) const
 		{
 			TORRENT_ASSERT(size() >= n);
 			return { data() + size() - n, n };
 		}
 
-		array_view<T> cut_first(size_t const n) const
+		span<T> cut_first(size_t const n) const
 		{
 			TORRENT_ASSERT(size() >= n);
 			return { data() + n, int(size()) - n };
@@ -108,7 +108,6 @@ namespace libtorrent { namespace aux {
 		T* m_ptr;
 		size_t m_len;
 	};
-}}
+}
-
-#endif
 
+#endif // TORRENT_SPAN_HPP_INCLUDED

include/libtorrent/tracker_manager.hpp

@@ -63,7 +63,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/deadline_timer.hpp"
 #include "libtorrent/union_endpoint.hpp"
 #include "libtorrent/io_service.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 #include "libtorrent/time.hpp"
 #include "libtorrent/debug.hpp"
 #include "libtorrent/error_code.hpp"
@@ -342,10 +342,10 @@ namespace libtorrent
 	public:
 
 		typedef boost::function<void(udp::endpoint const&
-			, aux::array_view<char const>
+			, span<char const>
 			, error_code&, int)> send_fun_t;
 		typedef boost::function<void(char const*, int
-			, aux::array_view<char const>
+			, span<char const>
 			, error_code&, int)> send_fun_hostname_t;
 
 		tracker_manager(send_fun_t const& send_fun
@@ -374,13 +374,13 @@ namespace libtorrent
 		void received_bytes(int bytes);
 
 		void incoming_error(error_code const& ec, udp::endpoint const& ep);
-		bool incoming_packet(udp::endpoint const& ep, aux::array_view<char const> buf);
+		bool incoming_packet(udp::endpoint const& ep, span<char const> buf);
 
 		// this is only used for SOCKS packets, since
 		// they may be addressed to hostname
 		// TODO: 3 make sure the udp_socket supports passing on string-hostnames
 		// too, and that this function is used
-		bool incoming_packet(char const* hostname, aux::array_view<char const> buf);
+		bool incoming_packet(char const* hostname, span<char const> buf);
 
 		void update_transaction_id(
 			boost::shared_ptr<udp_tracker_connection> c
@@ -389,10 +389,10 @@ namespace libtorrent
 		aux::session_settings const& settings() const { return m_settings; }
 		resolver_interface& host_resolver() { return m_host_resolver; }
 
-		void send_hostname(char const* hostname, int port, aux::array_view<char const> p
+		void send_hostname(char const* hostname, int port, span<char const> p
 			, error_code& ec, int flags = 0);
 
-		void send(udp::endpoint const& ep, aux::array_view<char const> p
+		void send(udp::endpoint const& ep, span<char const> p
 			, error_code& ec, int flags = 0);
 
 	private:

include/libtorrent/udp_socket.hpp

@@ -40,7 +40,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/buffer.hpp"
 #include "libtorrent/deadline_timer.hpp"
 #include "libtorrent/debug.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 #include "libtorrent/aux_/allocating_handler.hpp"
 
 namespace libtorrent
@@ -76,18 +76,18 @@ namespace libtorrent
 
 		struct packet
 		{
-			aux::array_view<char> data;
+			span<char> data;
 			udp::endpoint from;
 			error_code error;
 		};
 
-		int read(aux::array_view<packet> pkts, error_code& ec);
+		int read(span<packet> pkts, error_code& ec);
 
 		// this is only valid when using a socks5 proxy
-		void send_hostname(char const* hostname, int port, aux::array_view<char const> p
+		void send_hostname(char const* hostname, int port, span<char const> p
 			, error_code& ec, int flags = 0);
 
-		void send(udp::endpoint const& ep, aux::array_view<char const> p
+		void send(udp::endpoint const& ep, span<char const> p
 			, error_code& ec, int flags = 0);
 		void bind(udp::endpoint const& ep, error_code& ec);
 		void close();
@@ -128,9 +128,9 @@ namespace libtorrent
 		udp_socket(udp_socket const&);
 		udp_socket& operator=(udp_socket const&);
 
-		void wrap(udp::endpoint const& ep, aux::array_view<char const> p, error_code& ec, int flags);
+		void wrap(udp::endpoint const& ep, span<char const> p, error_code& ec, int flags);
-		void wrap(char const* hostname, int port, aux::array_view<char const> p, error_code& ec, int flags);
+		void wrap(char const* hostname, int port, span<char const> p, error_code& ec, int flags);
-		bool unwrap(udp::endpoint& from, aux::array_view<char>& buf);
+		bool unwrap(udp::endpoint& from, span<char>& buf);
 
 		udp::socket m_socket;
 

include/libtorrent/udp_tracker_connection.hpp

@@ -93,11 +93,11 @@ namespace libtorrent
 		void timeout(error_code const& error);
 		void start_announce();
 
-		bool on_receive(udp::endpoint const& ep, aux::array_view<char const> buf);
+		bool on_receive(udp::endpoint const& ep, span<char const> buf);
-		bool on_receive_hostname(char const* hostname, aux::array_view<char const> buf);
+		bool on_receive_hostname(char const* hostname, span<char const> buf);
-		bool on_connect_response(aux::array_view<char const> buf);
+		bool on_connect_response(span<char const> buf);
-		bool on_announce_response(aux::array_view<char const> buf);
+		bool on_announce_response(span<char const> buf);
-		bool on_scrape_response(aux::array_view<char const> buf);
+		bool on_scrape_response(span<char const> buf);
 
 		// wraps tracker_connection::fail
 		void fail(error_code const& ec, int code = -1

include/libtorrent/utp_socket_manager.hpp

@@ -39,7 +39,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/session_status.hpp"
 #include "libtorrent/enum_net.hpp"
 #include "libtorrent/aux_/session_settings.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #include "libtorrent/aux_/disable_warnings_push.hpp"
 
@@ -56,7 +56,7 @@ namespace libtorrent
 	struct utp_socket_manager final
 	{
 		typedef boost::function<void(udp::endpoint const&
-			, aux::array_view<char const>
+			, span<char const>
 			, error_code&, int)> send_fun_t;
 
 		typedef boost::function<void(boost::shared_ptr<socket_type> const&)>
@@ -71,7 +71,7 @@ namespace libtorrent
 		~utp_socket_manager();
 
 		// return false if this is not a uTP packet
-		bool incoming_packet(udp::endpoint const& ep, aux::array_view<char const> p);
+		bool incoming_packet(udp::endpoint const& ep, span<char const> p);
 
 		// if the UDP socket failed with an EAGAIN or EWOULDBLOCK, this will be
 		// called once the socket is writeable again

include/libtorrent/utp_stream.hpp

@@ -172,7 +172,7 @@ void delete_utp_impl(utp_socket_impl* s);
 bool should_delete(utp_socket_impl* s);
 void tick_utp_impl(utp_socket_impl* s, time_point now);
 void utp_init_mtu(utp_socket_impl* s, int link_mtu, int utp_mtu);
-bool utp_incoming_packet(utp_socket_impl* s, aux::array_view<char const> p
+bool utp_incoming_packet(utp_socket_impl* s, span<char const> p
 	, udp::endpoint const& ep, time_point receive_time);
 bool utp_match(utp_socket_impl* s, udp::endpoint const& ep, std::uint16_t id);
 udp::endpoint utp_remote_endpoint(utp_socket_impl* s);

simulation/test_dht_rate_limit.cpp

@@ -39,7 +39,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/performance_counters.hpp"
 #include "libtorrent/entry.hpp"
 #include "libtorrent/session_settings.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 #include "libtorrent/kademlia/dht_observer.hpp"
 
 #include <functional>
@@ -121,7 +121,7 @@ TORRENT_TEST(dht_rate_limit)
 		if (ec) return;
 		udp_socket::packet p;
 		error_code err;
-		int const num = int(sock.read(lt::aux::array_view<udp_socket::packet>(&p, 1), err));
+		int const num = int(sock.read(lt::span<udp_socket::packet>(&p, 1), err));
 		if (num) dht->incoming_packet(p.from, p.data.data(), int(p.data.size()));
 		if (stop || err) return;
 		sock.async_read(on_read);

src/bt_peer_connection.cpp

@@ -3471,12 +3471,12 @@ namespace libtorrent
 	}
 
 #if !defined(TORRENT_DISABLE_ENCRYPTION) && !defined(TORRENT_DISABLE_EXTENSIONS)
-	std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+	std::tuple<int, span<boost::asio::const_buffer>>
 	bt_peer_connection::hit_send_barrier(
-		aux::array_view<boost::asio::mutable_buffer> iovec)
+		span<boost::asio::mutable_buffer> iovec)
 	{
 		int next_barrier;
-		aux::array_view<boost::asio::const_buffer> out_iovec;
+		span<boost::asio::const_buffer> out_iovec;
 		std::tie(next_barrier, out_iovec) = m_enc_handler.encrypt(iovec);
 #ifndef TORRENT_DISABLE_LOGGING
 		if (next_barrier != 0)

src/entry.cpp

@@ -328,7 +328,7 @@ namespace libtorrent
 		m_type = dictionary_t;
 	}
 
-	entry::entry(aux::array_view<char const> v)
+	entry::entry(span<char const> v)
 		: m_type(undefined_t)
 	{
 #if TORRENT_USE_ASSERTS
@@ -468,7 +468,7 @@ namespace libtorrent
 		return *this;
 	}
 
-	entry& entry::operator=(aux::array_view<char const> v)
+	entry& entry::operator=(span<char const> v)
 	{
 		destruct();
 		new(&data) string_type(v.data(), v.size());

src/hasher.cpp

@@ -85,7 +85,7 @@ namespace libtorrent
 #endif
 	}
 
-	hasher::hasher(aux::array_view<char const> data)
+	hasher::hasher(span<char const> data)
 		: hasher()
 	{
 		update(data);
@@ -148,7 +148,7 @@ namespace libtorrent
 		return update({data, size_t(len)});
 	}
 
-	hasher& hasher::update(aux::array_view<char const> data)
+	hasher& hasher::update(span<char const> data)
 	{
 		TORRENT_ASSERT(!data.empty());
 #ifdef TORRENT_USE_LIBGCRYPT

src/kademlia/dht_tracker.cpp

@@ -687,7 +687,7 @@ namespace libtorrent { namespace dht
 		m_send_quota -= int(m_send_buf.size());
 
 		error_code ec;
-		m_send_fun(addr, aux::array_view<char const>(&m_send_buf[0]
+		m_send_fun(addr, span<char const>(&m_send_buf[0]
 			, int(m_send_buf.size())), ec, 0);
 		if (ec)
 		{

src/pe_crypto.cpp

@@ -54,7 +54,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/pe_crypto.hpp"
 #include "libtorrent/hasher.hpp"
 #include "libtorrent/assert.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 namespace libtorrent
 {
@@ -103,9 +103,9 @@ namespace libtorrent
 		m_xor_mask = h.final();
 	}
 
-	std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+	std::tuple<int, span<boost::asio::const_buffer>>
 	encryption_handler::encrypt(
-		aux::array_view<boost::asio::mutable_buffer> iovec)
+		span<boost::asio::mutable_buffer> iovec)
 	{
 		using namespace boost::asio;
 
@@ -146,7 +146,7 @@ namespace libtorrent
 		}
 
 		int next_barrier = 0;
-		aux::array_view<const_buffer> out_iovec;
+		span<const_buffer> out_iovec;
 		if (num_bufs != 0)
 		{
 			std::tie(next_barrier, out_iovec)
@@ -290,11 +290,11 @@ namespace libtorrent
 		encrypt(vec);
 	}
 
-	std::tuple<int, aux::array_view<boost::asio::const_buffer>>
+	std::tuple<int, span<boost::asio::const_buffer>>
-	rc4_handler::encrypt(aux::array_view<boost::asio::mutable_buffer> bufs)
+	rc4_handler::encrypt(span<boost::asio::mutable_buffer> bufs)
 	{
 		using namespace boost::asio;
-		aux::array_view<boost::asio::const_buffer> empty;
+		span<boost::asio::const_buffer> empty;
 		if (!m_encrypt) return std::make_tuple(0, empty);
 		if (bufs.size() == 0) return std::make_tuple(0, empty);
 
@@ -313,7 +313,7 @@ namespace libtorrent
 		return std::make_tuple(bytes_processed, empty);
 	}
 
-	void rc4_handler::decrypt(aux::array_view<boost::asio::mutable_buffer> bufs
+	void rc4_handler::decrypt(span<boost::asio::mutable_buffer> bufs
 		, int& consume
 		, int& produce
 		, int& packet_size)

src/peer_connection.cpp

@@ -5473,7 +5473,7 @@ namespace libtorrent
 			int const send_bytes = (std::min)(m_send_buffer.size(), 1024*1024);
 			m_send_buffer.build_mutable_iovec(send_bytes, vec);
 			int next_barrier;
-			aux::array_view<boost::asio::const_buffer> inject_vec;
+			span<boost::asio::const_buffer> inject_vec;
 			std::tie(next_barrier, inject_vec) = hit_send_barrier(vec);
 			for (auto i = inject_vec.rbegin(); i != inject_vec.rend(); ++i)
 			{

src/receive_buffer.cpp

@@ -51,7 +51,7 @@ boost::asio::mutable_buffer receive_buffer::reserve(int size)
 	{
 		int const new_size = std::max(m_recv_end + size, m_packet_size);
 		buffer new_buffer(new_size
-			, aux::array_view<char const>(m_recv_buffer.ptr(), m_recv_end));
+			, span<char const>(m_recv_buffer.ptr(), m_recv_end));
 		m_recv_buffer = std::move(new_buffer);
 
 		// since we just increased the size of the buffer, reset the watermark to
@@ -73,7 +73,7 @@ void receive_buffer::grow(int const limit)
 
 	// re-allcoate the buffer and copy over the part of it that's used
 	buffer new_buffer(new_size
-		, aux::array_view<char const>(m_recv_buffer.ptr(), m_recv_end));
+		, span<char const>(m_recv_buffer.ptr(), m_recv_end));
 	m_recv_buffer = std::move(new_buffer);
 
 	// since we just increased the size of the buffer, reset the watermark to
@@ -187,7 +187,7 @@ void receive_buffer::normalize(int force_shrink)
 	bool const shrink_buffer = m_recv_buffer.size() / 2 > m_watermark.mean()
 		&& m_watermark.mean() > (m_recv_end - m_recv_start);
 
-	aux::array_view<char const> bytes_to_shift(
+	span<char const> bytes_to_shift(
 		m_recv_buffer.ptr() + m_recv_start
 			, m_recv_end - m_recv_start);
 

src/session_impl.cpp

@@ -2196,7 +2196,7 @@ namespace aux {
 
 	void session_impl::send_udp_packet_hostname(char const* hostname
 		, int const port
-		, array_view<char const> p
+		, span<char const> p
 		, error_code& ec
 		, int const flags)
 	{
@@ -2227,7 +2227,7 @@ namespace aux {
 
 	void session_impl::send_udp_packet(bool const ssl
 		, udp::endpoint const& ep
-		, array_view<char const> p
+		, span<char const> p
 		, error_code& ec
 		, int const flags)
 	{
@@ -2346,7 +2346,7 @@ namespace aux {
 					continue;
 				}
 
-				aux::array_view<char const> const buf = packet.data;
+				span<char const> const buf = packet.data;
 
 				// give the uTP socket manager first dis on the packet. Presumably
 				// the majority of packets are uTP packets.

src/tracker_manager.cpp

@@ -46,7 +46,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/udp_tracker_connection.hpp"
 #include "libtorrent/aux_/session_impl.hpp"
 #include "libtorrent/aux_/io.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 
 using namespace std::placeholders;
@@ -312,7 +312,7 @@ namespace libtorrent
 	}
 
 	bool tracker_manager::incoming_packet(udp::endpoint const& ep
-		, aux::array_view<char const> const buf)
+		, span<char const> const buf)
 	{
 		TORRENT_ASSERT(is_single_thread());
 		// ignore packets smaller than 8 bytes
@@ -327,7 +327,7 @@ namespace libtorrent
 
 		// the first word is the action, if it's not [0, 3]
 		// it's not a valid udp tracker response
-		aux::array_view<const char> ptr = buf;
+		span<const char> ptr = buf;
 		std::uint32_t const action = aux::read_uint32(ptr);
 		if (action > 3) return false;
 
@@ -357,7 +357,7 @@ namespace libtorrent
 	}
 
 	bool tracker_manager::incoming_packet(char const* hostname
-		, aux::array_view<char const> const buf)
+		, span<char const> const buf)
 	{
 		TORRENT_ASSERT(is_single_thread());
 		// ignore packets smaller than 8 bytes
@@ -365,7 +365,7 @@ namespace libtorrent
 
 		// the first word is the action, if it's not [0, 3]
 		// it's not a valid udp tracker response
-		aux::array_view<const char> ptr = buf;
+		span<const char> ptr = buf;
 		std::uint32_t const action = aux::read_uint32(ptr);
 		if (action > 3) return false;
 
@@ -389,14 +389,14 @@ namespace libtorrent
 	}
 
 	void tracker_manager::send_hostname(char const* hostname, int const port
-		, array_view<char const> p, error_code& ec, int const flags)
+		, span<char const> p, error_code& ec, int const flags)
 	{
 		TORRENT_ASSERT(is_single_thread());
 		m_send_fun_hostname(hostname, port, p, ec, flags);
 	}
 
 	void tracker_manager::send(udp::endpoint const& ep
-		, array_view<char const> p
+		, span<char const> p
 		, error_code& ec, int const flags)
 	{
 		TORRENT_ASSERT(is_single_thread());

src/udp_socket.cpp

@@ -169,7 +169,7 @@ udp_socket::udp_socket(io_service& ios)
 	, m_abort(true)
 {}
 
-int udp_socket::read(array_view<packet> pkts, error_code& ec)
+int udp_socket::read(span<packet> pkts, error_code& ec)
 {
 	int const num = int(pkts.size());
 	int ret = 0;
@@ -203,11 +203,11 @@ int udp_socket::read(array_view<packet> pkts, error_code& ec)
 				&&  m_socks5_connection->active())) continue;
 
 			p.error = ec;
-			p.data = array_view<char>();
+			p.data = span<char>();
 		}
 		else
 		{
-			p.data = array_view<char>(m_buf->data(), len);
+			p.data = span<char>(m_buf->data(), len);
 
 			// support packets coming from the SOCKS5 proxy
 			if (m_socks5_connection && m_socks5_connection->active())
@@ -234,7 +234,7 @@ int udp_socket::read(array_view<packet> pkts, error_code& ec)
 }
 
 void udp_socket::send_hostname(char const* hostname, int const port
-	, array_view<char const> p, error_code& ec, int const flags)
+	, span<char const> p, error_code& ec, int const flags)
 {
 	TORRENT_ASSERT(is_single_thread());
 
@@ -264,7 +264,7 @@ void udp_socket::send_hostname(char const* hostname, int const port
 	if (!ec) send(udp::endpoint(target, port), p, ec, flags);
 }
 
-void udp_socket::send(udp::endpoint const& ep, array_view<char const> p
+void udp_socket::send(udp::endpoint const& ep, span<char const> p
 	, error_code& ec, int const flags)
 {
 	TORRENT_ASSERT(is_single_thread());
@@ -298,7 +298,7 @@ void udp_socket::send(udp::endpoint const& ep, array_view<char const> p
 	m_socket.send_to(boost::asio::buffer(p.data(), p.size()), ep, 0, ec);
 }
 
-void udp_socket::wrap(udp::endpoint const& ep, array_view<char const> p
+void udp_socket::wrap(udp::endpoint const& ep, span<char const> p
 	, error_code& ec, int const flags)
 {
 	TORRENT_UNUSED(flags);
@@ -323,7 +323,7 @@ void udp_socket::wrap(udp::endpoint const& ep, array_view<char const> p
 	m_socket.send_to(iovec, m_socks5_connection->target(), 0, ec);
 }
 
-void udp_socket::wrap(char const* hostname, int const port, array_view<char const> p
+void udp_socket::wrap(char const* hostname, int const port, span<char const> p
 	, error_code& ec, int const flags)
 {
 	TORRENT_UNUSED(flags);
@@ -356,7 +356,7 @@ void udp_socket::wrap(char const* hostname, int const port, array_view<char cons
 // buf is an in-out parameter. It will be updated
 // return false if the packet should be ignored. It's not a valid Socks5 UDP
 // forwarded packet
-bool udp_socket::unwrap(udp::endpoint& from, array_view<char>& buf)
+bool udp_socket::unwrap(udp::endpoint& from, span<char>& buf)
 {
 	using namespace libtorrent::detail;
 
@@ -396,7 +396,7 @@ bool udp_socket::unwrap(udp::endpoint& from, array_view<char>& buf)
 		from = udp::endpoint(addr, read_uint16(p));
 	}
 
-	buf = array_view<char>(p, size - (p - buf.data()));
+	buf = span<char>(p, size - (p - buf.data()));
 	return true;
 }
 

src/udp_tracker_connection.cpp

@@ -53,7 +53,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/ip_filter.hpp"
 #include "libtorrent/aux_/time.hpp"
 #include "libtorrent/aux_/io.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #ifndef TORRENT_DISABLE_LOGGING
 #include "libtorrent/socket_io.hpp"
@@ -325,7 +325,7 @@ namespace libtorrent
 	}
 
 	bool udp_tracker_connection::on_receive_hostname(char const* hostname
-		, aux::array_view<char const> buf)
+		, span<char const> buf)
 	{
 		TORRENT_UNUSED(hostname);
 		// just ignore the hostname this came from, pretend that
@@ -336,7 +336,7 @@ namespace libtorrent
 	}
 
 	bool udp_tracker_connection::on_receive(udp::endpoint const& ep
-		, aux::array_view<char const> const buf)
+		, span<char const> const buf)
 	{
 #ifndef TORRENT_DISABLE_LOGGING
 		boost::shared_ptr<request_callback> cb = requester();
@@ -382,9 +382,9 @@ namespace libtorrent
 		// ignore packets smaller than 8 bytes
 		if (buf.size() < 8) return false;
 
-		aux::array_view<const char> ptr = buf;
+		span<const char> ptr = buf;
-		int const action = read_int32(ptr);
+		int const action = aux::read_int32(ptr);
-		std::uint32_t const transaction = read_uint32(ptr);
+		std::uint32_t const transaction = aux::read_uint32(ptr);
 
 #ifndef TORRENT_DISABLE_LOGGING
 		if (cb) cb->debug_log("*** UDP_TRACKER_PACKET [ action: %d ]", action);
@@ -452,7 +452,7 @@ namespace libtorrent
 		m_transaction_id = new_tid;
 	}
 
-	bool udp_tracker_connection::on_connect_response(aux::array_view<char const> buf)
+	bool udp_tracker_connection::on_connect_response(span<char const> buf)
 	{
 		// ignore packets smaller than 16 bytes
 		if (buf.size() < 16) return false;
@@ -464,7 +464,7 @@ namespace libtorrent
 
 		// reset transaction
 		update_transaction_id();
-		std::uint64_t const connection_id = read_int64(buf);
+		std::uint64_t const connection_id = aux::read_int64(buf);
 
 		std::lock_guard<std::mutex> l(m_cache_mutex);
 		connection_cache_entry& cce = m_connection_cache[m_target.address()];
@@ -493,7 +493,7 @@ namespace libtorrent
 		}
 
 		char buf[16];
-		aux::array_view<char> view = buf;
+		span<char> view = buf;
 
 		TORRENT_ASSERT(m_transaction_id != 0);
 
@@ -555,7 +555,7 @@ namespace libtorrent
 		if (i == m_connection_cache.end()) return;
 
 		char buf[8 + 4 + 4 + 20];
-		aux::array_view<char> view = buf;
+		span<char> view = buf;
 
 		aux::write_int64(i->second.connection_id, view); // connection_id
 		aux::write_int32(action_scrape, view); // action (scrape)
@@ -588,7 +588,7 @@ namespace libtorrent
 		}
 	}
 
-	bool udp_tracker_connection::on_announce_response(aux::array_view<char const> buf)
+	bool udp_tracker_connection::on_announce_response(span<char const> buf)
 	{
 		if (buf.size() < 20) return false;
 
@@ -647,7 +647,7 @@ namespace libtorrent
 		return true;
 	}
 
-	bool udp_tracker_connection::on_scrape_response(aux::array_view<char const> buf)
+	bool udp_tracker_connection::on_scrape_response(span<char const> buf)
 	{
 		using namespace libtorrent::aux;
 
@@ -703,7 +703,7 @@ namespace libtorrent
 		if (m_abort) return;
 
 		char buf[800];
-		aux::array_view<char> out = buf;
+		span<char> out = buf;
 
 		tracker_request const& req = tracker_req();
 		bool const stats = req.send_stats;
@@ -771,13 +771,13 @@ namespace libtorrent
 		if (!m_hostname.empty())
 		{
 			m_man.send_hostname(m_hostname.c_str()
-				, m_target.port(), aux::array_view<char const>(buf
+				, m_target.port(), span<char const>(buf
 					, int(sizeof(buf) - out.size())), ec
 				, udp_socket::tracker_connection);
 		}
 		else
 		{
-			m_man.send(m_target, aux::array_view<char const>(buf
+			m_man.send(m_target, span<char const>(buf
 					, int(sizeof(buf) - out.size())), ec
 				, udp_socket::tracker_connection);
 		}

src/utp_socket_manager.cpp

@@ -40,7 +40,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/random.hpp"
 #include "libtorrent/performance_counters.hpp"
 #include "libtorrent/aux_/time.hpp" // for aux::time_now()
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 // #define TORRENT_DEBUG_MTU 1135
 
@@ -157,13 +157,13 @@ namespace libtorrent
 		if ((flags & dont_fragment) && len > TORRENT_DEBUG_MTU) return;
 #endif
 
-		m_send_fun(ep, array_view<char const>(p, len), ec
+		m_send_fun(ep, span<char const>(p, len), ec
 			, ((flags & dont_fragment) ? udp_socket::dont_fragment : 0)
 				| udp_socket::peer_connection);
 	}
 
 	bool utp_socket_manager::incoming_packet(udp::endpoint const& ep
-			, aux::array_view<char const> p)
+			, span<char const> p)
 	{
 //		UTP_LOGV("incoming packet size:%d\n", size);
 

src/utp_stream.cpp

@@ -326,7 +326,7 @@ struct utp_socket_impl
 
 	void tick(time_point now);
 	void init_mtu(int link_mtu, int utp_mtu);
-	bool incoming_packet(aux::array_view<std::uint8_t const> buf
+	bool incoming_packet(span<std::uint8_t const> buf
 		, udp::endpoint const& ep, time_point receive_time);
 	void writable();
 
@@ -747,11 +747,11 @@ void utp_init_mtu(utp_socket_impl* s, int link_mtu, int utp_mtu)
 }
 
 bool utp_incoming_packet(utp_socket_impl* s
-	, aux::array_view<char const> p
+	, span<char const> p
 	, udp::endpoint const& ep, time_point receive_time)
 {
 	return s->incoming_packet(
-		aux::array_view<std::uint8_t const>(reinterpret_cast<std::uint8_t const*>(p.data()), int(p.size()))
+		span<std::uint8_t const>(reinterpret_cast<std::uint8_t const*>(p.data()), int(p.size()))
 		, ep, receive_time);
 }
 
@@ -2704,7 +2704,7 @@ void utp_socket_impl::init_mtu(int link_mtu, int utp_mtu)
 }
 
 // return false if this is an invalid packet
-bool utp_socket_impl::incoming_packet(aux::array_view<std::uint8_t const> buf
+bool utp_socket_impl::incoming_packet(span<std::uint8_t const> buf
 	, udp::endpoint const& ep, time_point receive_time)
 {
 	INVARIANT_CHECK;

test/test_pe_crypto.cpp

@@ -37,7 +37,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/pe_crypto.hpp"
 #include "libtorrent/session.hpp"
 #include "libtorrent/random.hpp"
-#include "libtorrent/aux_/array_view.hpp"
+#include "libtorrent/span.hpp"
 
 #include "setup_transfer.hpp"
 #include "test.hpp"
@@ -63,7 +63,7 @@ void test_enc_handler(libtorrent::crypto_plugin& a, libtorrent::crypto_plugin& b
 		{
 			mutable_buffer iovec(&buf[0], buf_len);
 			int next_barrier;
-			lt::aux::array_view<const_buffer> iovec_out;
+			lt::span<const_buffer> iovec_out;
 			std::tie(next_barrier, iovec_out) = a.encrypt(iovec);
 			TEST_CHECK(buf != cmp_buf);
 			TEST_EQUAL(iovec_out.size(), 0);
@@ -85,7 +85,7 @@ void test_enc_handler(libtorrent::crypto_plugin& a, libtorrent::crypto_plugin& b
 		{
 			mutable_buffer iovec(&buf[0], buf_len);
 			int next_barrier;
-			lt::aux::array_view<const_buffer> iovec_out;
+			lt::span<const_buffer> iovec_out;
 			std::tie(next_barrier, iovec_out) = b.encrypt(iovec);
 			TEST_EQUAL(iovec_out.size(), 0);
 			TEST_CHECK(buf != cmp_buf);