utf8_prevCharSafeBody

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

INT utf8_prevCharSafeBody(
    const BYTE* s,
    INT start,
    INT* pi,
    INT c,
    CHAR strict
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function utf8_prevCharSafeBody(
    s As IntPtr,   ' BYTE*
    start As Integer,   ' INT
    ByRef pi As Integer,   ' INT* in/out
    c As Integer,   ' INT
    strict As SByte   ' CHAR
) As Integer
End Function

' s : BYTE*
' start : INT
' pi : INT* in/out
' c : INT
' strict : CHAR
Declare PtrSafe Function utf8_prevCharSafeBody Lib "icuuc" ( _
    ByVal s As LongPtr, _
    ByVal start As Long, _
    ByRef pi As Long, _
    ByVal c As Long, _
    ByVal strict As Byte) 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_prevCharSafeBody = ctypes.cdll.icuuc.utf8_prevCharSafeBody
utf8_prevCharSafeBody.restype = ctypes.c_int
utf8_prevCharSafeBody.argtypes = [
    ctypes.POINTER(ctypes.c_ubyte),  # s : BYTE*
    ctypes.c_int,  # start : INT
    ctypes.POINTER(ctypes.c_int),  # pi : INT* in/out
    ctypes.c_int,  # c : INT
    ctypes.c_byte,  # strict : CHAR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
utf8_prevCharSafeBody = Fiddle::Function.new(
  lib['utf8_prevCharSafeBody'],
  [
    Fiddle::TYPE_VOIDP,  # s : BYTE*
    Fiddle::TYPE_INT,  # start : INT
    Fiddle::TYPE_VOIDP,  # pi : INT* in/out
    Fiddle::TYPE_INT,  # c : INT
    Fiddle::TYPE_CHAR,  # strict : CHAR
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn utf8_prevCharSafeBody(
        s: *const u8,  // BYTE*
        start: i32,  // INT
        pi: *mut i32,  // INT* in/out
        c: i32,  // INT
        strict: i8  // CHAR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int utf8_prevCharSafeBody(IntPtr s, int start, ref int pi, int c, sbyte strict);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_utf8_prevCharSafeBody' -Namespace Win32 -PassThru
# $api::utf8_prevCharSafeBody(s, start, pi, c, strict)

#uselib "icuuc.dll"
#func global utf8_prevCharSafeBody "utf8_prevCharSafeBody" sptr, sptr, sptr, sptr, sptr
; utf8_prevCharSafeBody varptr(s), start, varptr(pi), c, strict   ; 戻り値は stat
; s : BYTE* -> "sptr"
; start : INT -> "sptr"
; pi : INT* in/out -> "sptr"
; c : INT -> "sptr"
; strict : CHAR -> "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。

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procutf8_prevCharSafeBody = icuuc.NewProc("utf8_prevCharSafeBody")
)

// s (BYTE*), start (INT), pi (INT* in/out), c (INT), strict (CHAR)
r1, _, err := procutf8_prevCharSafeBody.Call(
	uintptr(s),
	uintptr(start),
	uintptr(pi),
	uintptr(c),
	uintptr(strict),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function utf8_prevCharSafeBody(
  s: Pointer;   // BYTE*
  start: Integer;   // INT
  pi: Pointer;   // INT* in/out
  c: Integer;   // INT
  strict: Shortint   // CHAR
): Integer; cdecl;
  external 'icuuc.dll' name 'utf8_prevCharSafeBody';

result := DllCall("icuuc\utf8_prevCharSafeBody"
    , "Ptr", s   ; BYTE*
    , "Int", start   ; INT
    , "Ptr", pi   ; INT* in/out
    , "Int", c   ; INT
    , "Char", strict   ; CHAR
    , "Cdecl Int")   ; return: INT

●utf8_prevCharSafeBody(s, start, pi, c, strict) = DLL("icuuc.dll", "int utf8_prevCharSafeBody(void*, int, void*, int, char)")
# 呼び出し: utf8_prevCharSafeBody(s, start, pi, c, strict)
# s : BYTE* -> "void*"
# start : INT -> "int"
# pi : INT* in/out -> "void*"
# c : INT -> "int"
# strict : CHAR -> "char"
# 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。

const std = @import("std");

extern "icuuc" fn utf8_prevCharSafeBody(
    s: [*c]u8, // BYTE*
    start: i32, // INT
    pi: [*c]i32, // INT* in/out
    c: i32, // INT
    strict: i8 // CHAR
) callconv(.c) i32;

proc utf8_prevCharSafeBody(
    s: ptr uint8,  # BYTE*
    start: int32,  # INT
    pi: ptr int32,  # INT* in/out
    c: int32,  # INT
    strict: int8  # CHAR
): int32 {.importc: "utf8_prevCharSafeBody", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int utf8_prevCharSafeBody(
    ubyte* s,   // BYTE*
    int start,   // INT
    int* pi,   // INT* in/out
    int c,   // INT
    byte strict   // CHAR
);

ccall((:utf8_prevCharSafeBody, "icuuc.dll"), Int32,
      (Ptr{UInt8}, Int32, Ptr{Int32}, Int32, Int8),
      s, start, pi, c, strict)
# s : BYTE* -> Ptr{UInt8}
# start : INT -> Int32
# pi : INT* in/out -> Ptr{Int32}
# c : INT -> Int32
# strict : CHAR -> Int8

local ffi = require("ffi")
ffi.cdef[[
int32_t utf8_prevCharSafeBody(
    uint8_t* s,
    int32_t start,
    int32_t* pi,
    int32_t c,
    int8_t strict);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.utf8_prevCharSafeBody(s, start, pi, c, strict)
-- s : BYTE*
-- start : INT
-- pi : INT* in/out
-- c : INT
-- strict : CHAR
-- 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('icuuc.dll');
const utf8_prevCharSafeBody = lib.func('__cdecl', 'utf8_prevCharSafeBody', 'int32_t', ['uint8_t *', 'int32_t', 'int32_t *', 'int32_t', 'int8_t']);
// utf8_prevCharSafeBody(s, start, pi, c, strict)
// s : BYTE* -> 'uint8_t *'
// start : INT -> 'int32_t'
// pi : INT* in/out -> 'int32_t *'
// c : INT -> 'int32_t'
// strict : CHAR -> 'int8_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("icuuc.dll", {
  utf8_prevCharSafeBody: { parameters: ["pointer", "i32", "pointer", "i32", "i8"], result: "i32" },
});
// lib.symbols.utf8_prevCharSafeBody(s, start, pi, c, strict)
// s : BYTE* -> "pointer"
// start : INT -> "i32"
// pi : INT* in/out -> "pointer"
// c : INT -> "i32"
// strict : CHAR -> "i8"
// 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 utf8_prevCharSafeBody(
    uint8_t* s,
    int32_t start,
    int32_t* pi,
    int32_t c,
    int8_t strict);
C, "icuuc.dll");
// $ffi->utf8_prevCharSafeBody(s, start, pi, c, strict);
// s : BYTE*
// start : INT
// pi : INT* in/out
// c : INT
// strict : CHAR
// 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。

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

public interface Icuuc extends Library {
    Icuuc INSTANCE = Native.load("icuuc", Icuuc.class);
    int utf8_prevCharSafeBody(
        byte[] s,   // BYTE*
        int start,   // INT
        IntByReference pi,   // INT* in/out
        int c,   // INT
        byte strict   // CHAR
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun utf8_prevCharSafeBody = utf8_prevCharSafeBody(
    s : UInt8*,   # BYTE*
    start : Int32,   # INT
    pi : Int32*,   # INT* in/out
    c : Int32,   # INT
    strict : Int8   # CHAR
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。

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

typedef utf8_prevCharSafeBodyNative = Int32 Function(Pointer<Uint8>, Int32, Pointer<Int32>, Int32, Int8);
typedef utf8_prevCharSafeBodyDart = int Function(Pointer<Uint8>, int, Pointer<Int32>, int, int);
final utf8_prevCharSafeBody = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<utf8_prevCharSafeBodyNative, utf8_prevCharSafeBodyDart>('utf8_prevCharSafeBody');
// s : BYTE* -> Pointer<Uint8>
// start : INT -> Int32
// pi : INT* in/out -> Pointer<Int32>
// c : INT -> Int32
// strict : CHAR -> Int8
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function utf8_prevCharSafeBody(
  s: Pointer;   // BYTE*
  start: Integer;   // INT
  pi: Pointer;   // INT* in/out
  c: Integer;   // INT
  strict: Shortint   // CHAR
): Integer; cdecl;
  external 'icuuc.dll' name 'utf8_prevCharSafeBody';

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

foreign import ccall safe "utf8_prevCharSafeBody"
  c_utf8_prevCharSafeBody :: Ptr Word8 -> Int32 -> Ptr Int32 -> Int32 -> Int8 -> IO Int32
-- s : BYTE* -> Ptr Word8
-- start : INT -> Int32
-- pi : INT* in/out -> Ptr Int32
-- c : INT -> Int32
-- strict : CHAR -> Int8
-- 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 utf8_prevcharsafebody =
  foreign "utf8_prevCharSafeBody"
    ((ptr uint8_t) @-> int32_t @-> (ptr int32_t) @-> int32_t @-> int8_t @-> returning int32_t)
(* s : BYTE* -> (ptr uint8_t) *)
(* start : INT -> int32_t *)
(* pi : INT* in/out -> (ptr int32_t) *)
(* c : INT -> int32_t *)
(* strict : CHAR -> int8_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 icuuc (t "icuuc.dll"))
(cffi:use-foreign-library icuuc)

(cffi:defcfun ("utf8_prevCharSafeBody" utf8-prev-char-safe-body :convention :cdecl) :int32
  (s :pointer)   ; BYTE*
  (start :int32)   ; INT
  (pi :pointer)   ; INT* in/out
  (c :int32)   ; INT
  (strict :int8))   ; CHAR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $utf8_prevCharSafeBody = Win32::API::More->new('icuuc',
    'int utf8_prevCharSafeBody(LPVOID s, int start, LPVOID pi, int c, char strict)');
# my $ret = $utf8_prevCharSafeBody->Call($s, $start, $pi, $c, $strict);
# s : BYTE* -> LPVOID
# start : INT -> int
# pi : INT* in/out -> LPVOID
# c : INT -> int
# strict : CHAR -> char
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。