utf8_appendCharSafeBody

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

INT utf8_appendCharSafeBody(
    BYTE* s,
    INT i,
    INT length,
    INT c,
    CHAR* pIsError
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function utf8_appendCharSafeBody(
    s As IntPtr,   ' BYTE* in/out
    i As Integer,   ' INT
    length As Integer,   ' INT
    c As Integer,   ' INT
    pIsError As IntPtr   ' CHAR* in/out
) As Integer
End Function

' s : BYTE* in/out
' i : INT
' length : INT
' c : INT
' pIsError : CHAR* in/out
Declare PtrSafe Function utf8_appendCharSafeBody Lib "icuuc" ( _
    ByVal s As LongPtr, _
    ByVal i As Long, _
    ByVal length As Long, _
    ByVal c As Long, _
    ByVal pIsError As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

utf8_appendCharSafeBody = ctypes.cdll.icuuc.utf8_appendCharSafeBody
utf8_appendCharSafeBody.restype = ctypes.c_int
utf8_appendCharSafeBody.argtypes = [
    ctypes.POINTER(ctypes.c_ubyte),  # s : BYTE* in/out
    ctypes.c_int,  # i : INT
    ctypes.c_int,  # length : INT
    ctypes.c_int,  # c : INT
    ctypes.POINTER(ctypes.c_byte),  # pIsError : CHAR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
utf8_appendCharSafeBody = Fiddle::Function.new(
  lib['utf8_appendCharSafeBody'],
  [
    Fiddle::TYPE_VOIDP,  # s : BYTE* in/out
    Fiddle::TYPE_INT,  # i : INT
    Fiddle::TYPE_INT,  # length : INT
    Fiddle::TYPE_INT,  # c : INT
    Fiddle::TYPE_VOIDP,  # pIsError : CHAR* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn utf8_appendCharSafeBody(
        s: *mut u8,  // BYTE* in/out
        i: i32,  // INT
        length: i32,  // INT
        c: i32,  // INT
        pIsError: *mut i8  // CHAR* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int utf8_appendCharSafeBody(IntPtr s, int i, int length, int c, IntPtr pIsError);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_utf8_appendCharSafeBody' -Namespace Win32 -PassThru
# $api::utf8_appendCharSafeBody(s, i, length, c, pIsError)

#uselib "icuuc.dll"
#func global utf8_appendCharSafeBody "utf8_appendCharSafeBody" sptr, sptr, sptr, sptr, sptr
; utf8_appendCharSafeBody varptr(s), i, length, c, varptr(pIsError)   ; 戻り値は stat
; s : BYTE* in/out -> "sptr"
; i : INT -> "sptr"
; length : INT -> "sptr"
; c : INT -> "sptr"
; pIsError : CHAR* in/out -> "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 "icuuc.dll"
#cfunc global utf8_appendCharSafeBody "utf8_appendCharSafeBody" var, int, int, int, var
; res = utf8_appendCharSafeBody(s, i, length, c, pIsError)
; s : BYTE* in/out -> "var"
; i : INT -> "int"
; length : INT -> "int"
; c : INT -> "int"
; pIsError : CHAR* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT utf8_appendCharSafeBody(BYTE* s, INT i, INT length, INT c, CHAR* pIsError)
#uselib "icuuc.dll"
#cfunc global utf8_appendCharSafeBody "utf8_appendCharSafeBody" var, int, int, int, var
; res = utf8_appendCharSafeBody(s, i, length, c, pIsError)
; s : BYTE* in/out -> "var"
; i : INT -> "int"
; length : INT -> "int"
; c : INT -> "int"
; pIsError : CHAR* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procutf8_appendCharSafeBody = icuuc.NewProc("utf8_appendCharSafeBody")
)

// s (BYTE* in/out), i (INT), length (INT), c (INT), pIsError (CHAR* in/out)
r1, _, err := procutf8_appendCharSafeBody.Call(
	uintptr(s),
	uintptr(i),
	uintptr(length),
	uintptr(c),
	uintptr(pIsError),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function utf8_appendCharSafeBody(
  s: Pointer;   // BYTE* in/out
  i: Integer;   // INT
  length: Integer;   // INT
  c: Integer;   // INT
  pIsError: Pointer   // CHAR* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'utf8_appendCharSafeBody';

result := DllCall("icuuc\utf8_appendCharSafeBody"
    , "Ptr", s   ; BYTE* in/out
    , "Int", i   ; INT
    , "Int", length   ; INT
    , "Int", c   ; INT
    , "Ptr", pIsError   ; CHAR* in/out
    , "Cdecl Int")   ; return: INT

●utf8_appendCharSafeBody(s, i, length, c, pIsError) = DLL("icuuc.dll", "int utf8_appendCharSafeBody(void*, int, int, int, void*)")
# 呼び出し: utf8_appendCharSafeBody(s, i, length, c, pIsError)
# s : BYTE* in/out -> "void*"
# i : INT -> "int"
# length : INT -> "int"
# c : INT -> "int"
# pIsError : CHAR* in/out -> "void*"
# 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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。