send

// WS2_32.dll
#include <windows.h>

INT send(
    SOCKET s,
    LPCSTR buf,
    INT len,
    SEND_RECV_FLAGS flags
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function send(
    s As UIntPtr,   ' SOCKET
    <MarshalAs(UnmanagedType.LPStr)> buf As String,   ' LPCSTR
    len As Integer,   ' INT
    flags As Integer   ' SEND_RECV_FLAGS
) As Integer
End Function

' s : SOCKET
' buf : LPCSTR
' len : INT
' flags : SEND_RECV_FLAGS
Declare PtrSafe Function send Lib "ws2_32" ( _
    ByVal s As LongPtr, _
    ByVal buf As String, _
    ByVal len As Long, _
    ByVal flags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

send = ctypes.windll.ws2_32.send
send.restype = ctypes.c_int
send.argtypes = [
    ctypes.c_size_t,  # s : SOCKET
    wintypes.LPCSTR,  # buf : LPCSTR
    ctypes.c_int,  # len : INT
    ctypes.c_int,  # flags : SEND_RECV_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
send = Fiddle::Function.new(
  lib['send'],
  [
    Fiddle::TYPE_UINTPTR_T,  # s : SOCKET
    Fiddle::TYPE_VOIDP,  # buf : LPCSTR
    Fiddle::TYPE_INT,  # len : INT
    Fiddle::TYPE_INT,  # flags : SEND_RECV_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn send(
        s: usize,  // SOCKET
        buf: *const u8,  // LPCSTR
        len: i32,  // INT
        flags: i32  // SEND_RECV_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int send(UIntPtr s, [MarshalAs(UnmanagedType.LPStr)] string buf, int len, int flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_send' -Namespace Win32 -PassThru
# $api::send(s, buf, len, flags)

#uselib "WS2_32.dll"
#func global send "send" sptr, sptr, sptr, sptr
; send s, buf, len, flags   ; 戻り値は stat
; s : SOCKET -> "sptr"
; buf : LPCSTR -> "sptr"
; len : INT -> "sptr"
; flags : SEND_RECV_FLAGS -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "WS2_32.dll"
#cfunc global send "send" sptr, str, int, int
; res = send(s, buf, len, flags)
; s : SOCKET -> "sptr"
; buf : LPCSTR -> "str"
; len : INT -> "int"
; flags : SEND_RECV_FLAGS -> "int"

; INT send(SOCKET s, LPCSTR buf, INT len, SEND_RECV_FLAGS flags)
#uselib "WS2_32.dll"
#cfunc global send "send" intptr, str, int, int
; res = send(s, buf, len, flags)
; s : SOCKET -> "intptr"
; buf : LPCSTR -> "str"
; len : INT -> "int"
; flags : SEND_RECV_FLAGS -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procsend = ws2_32.NewProc("send")
)

// s (SOCKET), buf (LPCSTR), len (INT), flags (SEND_RECV_FLAGS)
r1, _, err := procsend.Call(
	uintptr(s),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(buf))),
	uintptr(len),
	uintptr(flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function send(
  s: NativeUInt;   // SOCKET
  buf: PAnsiChar;   // LPCSTR
  len: Integer;   // INT
  flags: Integer   // SEND_RECV_FLAGS
): Integer; stdcall;
  external 'WS2_32.dll' name 'send';

result := DllCall("WS2_32\send"
    , "UPtr", s   ; SOCKET
    , "AStr", buf   ; LPCSTR
    , "Int", len   ; INT
    , "Int", flags   ; SEND_RECV_FLAGS
    , "Int")   ; return: INT

●send(s, buf, len, flags) = DLL("WS2_32.dll", "int send(int, char*, int, int)")
# 呼び出し: send(s, buf, len, flags)
# s : SOCKET -> "int"
# buf : LPCSTR -> "char*"
# len : INT -> "int"
# flags : SEND_RECV_FLAGS -> "int"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。

const std = @import("std");

extern "ws2_32" fn send(
    s: usize, // SOCKET
    buf: [*c]const u8, // LPCSTR
    len: i32, // INT
    flags: i32 // SEND_RECV_FLAGS
) callconv(std.os.windows.WINAPI) i32;

proc send(
    s: uint,  # SOCKET
    buf: cstring,  # LPCSTR
    len: int32,  # INT
    flags: int32  # SEND_RECV_FLAGS
): int32 {.importc: "send", stdcall, dynlib: "WS2_32.dll".}

pragma(lib, "ws2_32");
extern(Windows)
int send(
    size_t s,   // SOCKET
    const(char)* buf,   // LPCSTR
    int len,   // INT
    int flags   // SEND_RECV_FLAGS
);

ccall((:send, "WS2_32.dll"), stdcall, Int32,
      (Csize_t, Cstring, Int32, Int32),
      s, buf, len, flags)
# s : SOCKET -> Csize_t
# buf : LPCSTR -> Cstring
# len : INT -> Int32
# flags : SEND_RECV_FLAGS -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t send(
    uintptr_t s,
    const char* buf,
    int32_t len,
    int32_t flags);
]]
local ws2_32 = ffi.load("ws2_32")
-- ws2_32.send(s, buf, len, flags)
-- s : SOCKET
-- buf : LPCSTR
-- len : INT
-- flags : SEND_RECV_FLAGS
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('WS2_32.dll');
const send = lib.func('__stdcall', 'send', 'int32_t', ['uintptr_t', 'str', 'int32_t', 'int32_t']);
// send(s, buf, len, flags)
// s : SOCKET -> 'uintptr_t'
// buf : LPCSTR -> 'str'
// len : INT -> 'int32_t'
// flags : SEND_RECV_FLAGS -> 'int32_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("WS2_32.dll", {
  send: { parameters: ["usize", "buffer", "i32", "i32"], result: "i32" },
});
// lib.symbols.send(s, buf, len, flags)
// s : SOCKET -> "usize"
// buf : LPCSTR -> "buffer"
// len : INT -> "i32"
// flags : SEND_RECV_FLAGS -> "i32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t send(
    size_t s,
    const char* buf,
    int32_t len,
    int32_t flags);
C, "WS2_32.dll");
// $ffi->send(s, buf, len, flags);
// s : SOCKET
// buf : LPCSTR
// len : INT
// flags : SEND_RECV_FLAGS
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Ws2_32 extends StdCallLibrary {
    Ws2_32 INSTANCE = Native.load("ws2_32", Ws2_32.class);
    int send(
        long s,   // SOCKET
        String buf,   // LPCSTR
        int len,   // INT
        int flags   // SEND_RECV_FLAGS
    );
}

@[Link("ws2_32")]
lib LibWS2_32
  fun send = send(
    s : LibC::SizeT,   # SOCKET
    buf : UInt8*,   # LPCSTR
    len : Int32,   # INT
    flags : Int32   # SEND_RECV_FLAGS
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef sendNative = Int32 Function(UintPtr, Pointer<Utf8>, Int32, Int32);
typedef sendDart = int Function(int, Pointer<Utf8>, int, int);
final send = DynamicLibrary.open('WS2_32.dll')
    .lookupFunction<sendNative, sendDart>('send');
// s : SOCKET -> UintPtr
// buf : LPCSTR -> Pointer<Utf8>
// len : INT -> Int32
// flags : SEND_RECV_FLAGS -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function send(
  s: NativeUInt;   // SOCKET
  buf: PAnsiChar;   // LPCSTR
  len: Integer;   // INT
  flags: Integer   // SEND_RECV_FLAGS
): Integer; stdcall;
  external 'WS2_32.dll' name 'send';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "send"
  c_send :: CUIntPtr -> CString -> Int32 -> Int32 -> IO Int32
-- s : SOCKET -> CUIntPtr
-- buf : LPCSTR -> CString
-- len : INT -> Int32
-- flags : SEND_RECV_FLAGS -> Int32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let send =
  foreign "send"
    (size_t @-> string @-> int32_t @-> int32_t @-> returning int32_t)
(* s : SOCKET -> size_t *)
(* buf : LPCSTR -> string *)
(* len : INT -> int32_t *)
(* flags : SEND_RECV_FLAGS -> int32_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library ws2_32 (t "WS2_32.dll"))
(cffi:use-foreign-library ws2_32)

(cffi:defcfun ("send" send :convention :stdcall) :int32
  (s :uint64)   ; SOCKET
  (buf :string)   ; LPCSTR
  (len :int32)   ; INT
  (flags :int32))   ; SEND_RECV_FLAGS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $send = Win32::API::More->new('WS2_32',
    'int send(WPARAM s, LPCSTR buf, int len, int flags)');
# my $ret = $send->Call($s, $buf, $len, $flags);
# s : SOCKET -> WPARAM
# buf : LPCSTR -> LPCSTR
# len : INT -> int
# flags : SEND_RECV_FLAGS -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。