ucnv_getNextUChar

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

INT ucnv_getNextUChar(
    UConverter* converter,
    const CHAR** source,
    LPCSTR sourceLimit,
    UErrorCode* err
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucnv_getNextUChar(
    ByRef converter As IntPtr,   ' UConverter* in/out
    source As IntPtr,   ' CHAR**
    <MarshalAs(UnmanagedType.LPStr)> sourceLimit As String,   ' LPCSTR
    ByRef err As Integer   ' UErrorCode* in/out
) As Integer
End Function

' converter : UConverter* in/out
' source : CHAR**
' sourceLimit : LPCSTR
' err : UErrorCode* in/out
Declare PtrSafe Function ucnv_getNextUChar Lib "icuuc" ( _
    ByRef converter As LongPtr, _
    ByVal source As LongPtr, _
    ByVal sourceLimit As String, _
    ByRef err 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

ucnv_getNextUChar = ctypes.cdll.icuuc.ucnv_getNextUChar
ucnv_getNextUChar.restype = ctypes.c_int
ucnv_getNextUChar.argtypes = [
    ctypes.c_void_p,  # converter : UConverter* in/out
    ctypes.c_void_p,  # source : CHAR**
    wintypes.LPCSTR,  # sourceLimit : LPCSTR
    ctypes.c_void_p,  # err : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucnv_getNextUChar = Fiddle::Function.new(
  lib['ucnv_getNextUChar'],
  [
    Fiddle::TYPE_VOIDP,  # converter : UConverter* in/out
    Fiddle::TYPE_VOIDP,  # source : CHAR**
    Fiddle::TYPE_VOIDP,  # sourceLimit : LPCSTR
    Fiddle::TYPE_VOIDP,  # err : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn ucnv_getNextUChar(
        converter: *mut isize,  // UConverter* in/out
        source: *const *const i8,  // CHAR**
        sourceLimit: *const u8,  // LPCSTR
        err: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int ucnv_getNextUChar(ref IntPtr converter, IntPtr source, [MarshalAs(UnmanagedType.LPStr)] string sourceLimit, ref int err);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucnv_getNextUChar' -Namespace Win32 -PassThru
# $api::ucnv_getNextUChar(converter, source, sourceLimit, err)

#uselib "icuuc.dll"
#func global ucnv_getNextUChar "ucnv_getNextUChar" sptr, sptr, sptr, sptr
; ucnv_getNextUChar varptr(converter), varptr(source), sourceLimit, varptr(err)   ; 戻り値は stat
; converter : UConverter* in/out -> "sptr"
; source : CHAR** -> "sptr"
; sourceLimit : LPCSTR -> "sptr"
; err : UErrorCode* 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。

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procucnv_getNextUChar = icuuc.NewProc("ucnv_getNextUChar")
)

// converter (UConverter* in/out), source (CHAR**), sourceLimit (LPCSTR), err (UErrorCode* in/out)
r1, _, err := procucnv_getNextUChar.Call(
	uintptr(converter),
	uintptr(source),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(sourceLimit))),
	uintptr(err),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ucnv_getNextUChar(
  converter: Pointer;   // UConverter* in/out
  source: Pointer;   // CHAR**
  sourceLimit: PAnsiChar;   // LPCSTR
  err: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'ucnv_getNextUChar';

result := DllCall("icuuc\ucnv_getNextUChar"
    , "Ptr", converter   ; UConverter* in/out
    , "Ptr", source   ; CHAR**
    , "AStr", sourceLimit   ; LPCSTR
    , "Ptr", err   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●ucnv_getNextUChar(converter, source, sourceLimit, err) = DLL("icuuc.dll", "int ucnv_getNextUChar(void*, void*, char*, void*)")
# 呼び出し: ucnv_getNextUChar(converter, source, sourceLimit, err)
# converter : UConverter* in/out -> "void*"
# source : CHAR** -> "void*"
# sourceLimit : LPCSTR -> "char*"
# err : UErrorCode* 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。

const std = @import("std");

extern "icuuc" fn ucnv_getNextUChar(
    converter: [*c]isize, // UConverter* in/out
    source: [*c][*c]i8, // CHAR**
    sourceLimit: [*c]const u8, // LPCSTR
    err: [*c]i32 // UErrorCode* in/out
) callconv(.c) i32;

proc ucnv_getNextUChar(
    `converter`: ptr int,  # UConverter* in/out
    source: ptr int8,  # CHAR**
    sourceLimit: cstring,  # LPCSTR
    err: ptr int32  # UErrorCode* in/out
): int32 {.importc: "ucnv_getNextUChar", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int ucnv_getNextUChar(
    ptrdiff_t* converter,   // UConverter* in/out
    byte** source,   // CHAR**
    const(char)* sourceLimit,   // LPCSTR
    int* err   // UErrorCode* in/out
);

ccall((:ucnv_getNextUChar, "icuuc.dll"), Int32,
      (Ptr{Int}, Ptr{Int8}, Cstring, Ptr{Int32}),
      converter, source, sourceLimit, err)
# converter : UConverter* in/out -> Ptr{Int}
# source : CHAR** -> Ptr{Int8}
# sourceLimit : LPCSTR -> Cstring
# err : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int32_t ucnv_getNextUChar(
    intptr_t* converter,
    int8_t** source,
    const char* sourceLimit,
    int32_t* err);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.ucnv_getNextUChar(converter, source, sourceLimit, err)
-- converter : UConverter* in/out
-- source : CHAR**
-- sourceLimit : LPCSTR
-- err : UErrorCode* in/out
-- 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 ucnv_getNextUChar = lib.func('__cdecl', 'ucnv_getNextUChar', 'int32_t', ['intptr_t *', 'int8_t *', 'str', 'int32_t *']);
// ucnv_getNextUChar(converter, source, sourceLimit, err)
// converter : UConverter* in/out -> 'intptr_t *'
// source : CHAR** -> 'int8_t *'
// sourceLimit : LPCSTR -> 'str'
// err : UErrorCode* in/out -> '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("icuuc.dll", {
  ucnv_getNextUChar: { parameters: ["pointer", "pointer", "buffer", "pointer"], result: "i32" },
});
// lib.symbols.ucnv_getNextUChar(converter, source, sourceLimit, err)
// converter : UConverter* in/out -> "pointer"
// source : CHAR** -> "pointer"
// sourceLimit : LPCSTR -> "buffer"
// err : UErrorCode* in/out -> "pointer"
// 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 ucnv_getNextUChar(
    intptr_t* converter,
    int8_t** source,
    const char* sourceLimit,
    int32_t* err);
C, "icuuc.dll");
// $ffi->ucnv_getNextUChar(converter, source, sourceLimit, err);
// converter : UConverter* in/out
// source : CHAR**
// sourceLimit : LPCSTR
// err : UErrorCode* in/out
// 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 ucnv_getNextUChar(
        LongByReference converter,   // UConverter* in/out
        Pointer source,   // CHAR**
        String sourceLimit,   // LPCSTR
        IntByReference err   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun ucnv_getNextUChar = ucnv_getNextUChar(
    converter : LibC::SSizeT*,   # UConverter* in/out
    source : Int8**,   # CHAR**
    sourceLimit : UInt8*,   # LPCSTR
    err : Int32*   # UErrorCode* in/out
  ) : 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 ucnv_getNextUCharNative = Int32 Function(Pointer<IntPtr>, Pointer<Int8>, Pointer<Utf8>, Pointer<Int32>);
typedef ucnv_getNextUCharDart = int Function(Pointer<IntPtr>, Pointer<Int8>, Pointer<Utf8>, Pointer<Int32>);
final ucnv_getNextUChar = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<ucnv_getNextUCharNative, ucnv_getNextUCharDart>('ucnv_getNextUChar');
// converter : UConverter* in/out -> Pointer<IntPtr>
// source : CHAR** -> Pointer<Int8>
// sourceLimit : LPCSTR -> Pointer<Utf8>
// err : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ucnv_getNextUChar(
  converter: Pointer;   // UConverter* in/out
  source: Pointer;   // CHAR**
  sourceLimit: PAnsiChar;   // LPCSTR
  err: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'ucnv_getNextUChar';

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

foreign import ccall safe "ucnv_getNextUChar"
  c_ucnv_getNextUChar :: Ptr CIntPtr -> Ptr Int8 -> CString -> Ptr Int32 -> IO Int32
-- converter : UConverter* in/out -> Ptr CIntPtr
-- source : CHAR** -> Ptr Int8
-- sourceLimit : LPCSTR -> CString
-- err : UErrorCode* in/out -> Ptr 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 ucnv_getnextuchar =
  foreign "ucnv_getNextUChar"
    ((ptr intptr_t) @-> (ptr int8_t) @-> string @-> (ptr int32_t) @-> returning int32_t)
(* converter : UConverter* in/out -> (ptr intptr_t) *)
(* source : CHAR** -> (ptr int8_t) *)
(* sourceLimit : LPCSTR -> string *)
(* err : UErrorCode* in/out -> (ptr 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 icuuc (t "icuuc.dll"))
(cffi:use-foreign-library icuuc)

(cffi:defcfun ("ucnv_getNextUChar" ucnv-get-next-uchar :convention :cdecl) :int32
  (converter :pointer)   ; UConverter* in/out
  (source :pointer)   ; CHAR**
  (source-limit :string)   ; LPCSTR
  (err :pointer))   ; UErrorCode* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $ucnv_getNextUChar = Win32::API::More->new('icuuc',
    'int ucnv_getNextUChar(LPVOID converter, LPVOID source, LPCSTR sourceLimit, LPVOID err)');
# my $ret = $ucnv_getNextUChar->Call($converter, $source, $sourceLimit, $err);
# converter : UConverter* in/out -> LPVOID
# source : CHAR** -> LPVOID
# sourceLimit : LPCSTR -> LPCSTR
# err : UErrorCode* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。