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ReadUrlCacheEntryStreamEx

関数
URLキャッシュストリームから64ビット位置のデータを読み取る。
DLLWININET.dll呼出規約winapi

シグネチャ

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

BOOL ReadUrlCacheEntryStreamEx(
    HANDLE hUrlCacheStream,
    ULONGLONG qwLocation,
    void* lpBuffer,
    DWORD* lpdwLen
);

パラメーター

名前型方向説明
hUrlCacheStreamHANDLEinRetrieveUrlCacheEntryStreamで取得したキャッシュストリームのハンドル。
qwLocationULONGLONGin読み取り開始位置のオフセットを表す64ビット値。大容量ファイルに対応する。
lpBuffervoid*out読み取ったデータを受け取るバッファへのポインター。
lpdwLenDWORD*inoutlpBufferのサイズ(バイト)を入出力する。実際に読み取ったバイト数が返る。

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL ReadUrlCacheEntryStreamEx(
    HANDLE hUrlCacheStream,
    ULONGLONG qwLocation,
    void* lpBuffer,
    DWORD* lpdwLen
);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", ExactSpelling = true)]
static extern bool ReadUrlCacheEntryStreamEx(
    IntPtr hUrlCacheStream,   // HANDLE
    ulong qwLocation,   // ULONGLONG
    IntPtr lpBuffer,   // void* out
    ref uint lpdwLen   // DWORD* in/out
);
<DllImport("WININET.dll", ExactSpelling:=True)>
Public Shared Function ReadUrlCacheEntryStreamEx(
    hUrlCacheStream As IntPtr,   ' HANDLE
    qwLocation As ULong,   ' ULONGLONG
    lpBuffer As IntPtr,   ' void* out
    ByRef lpdwLen As UInteger   ' DWORD* in/out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
' hUrlCacheStream : HANDLE
' qwLocation : ULONGLONG
' lpBuffer : void* out
' lpdwLen : DWORD* in/out
Declare PtrSafe Function ReadUrlCacheEntryStreamEx Lib "wininet" ( _
    ByVal hUrlCacheStream As LongPtr, _
    ByVal qwLocation As LongLong, _
    ByVal lpBuffer As LongPtr, _
    ByRef lpdwLen 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

ReadUrlCacheEntryStreamEx = ctypes.windll.wininet.ReadUrlCacheEntryStreamEx
ReadUrlCacheEntryStreamEx.restype = wintypes.BOOL
ReadUrlCacheEntryStreamEx.argtypes = [
    wintypes.HANDLE,  # hUrlCacheStream : HANDLE
    ctypes.c_ulonglong,  # qwLocation : ULONGLONG
    ctypes.POINTER(None),  # lpBuffer : void* out
    ctypes.POINTER(wintypes.DWORD),  # lpdwLen : DWORD* in/out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
ReadUrlCacheEntryStreamEx = Fiddle::Function.new(
  lib['ReadUrlCacheEntryStreamEx'],
  [
    Fiddle::TYPE_VOIDP,  # hUrlCacheStream : HANDLE
    -Fiddle::TYPE_LONG_LONG,  # qwLocation : ULONGLONG
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    Fiddle::TYPE_VOIDP,  # lpdwLen : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
#[link(name = "wininet")]
extern "system" {
    fn ReadUrlCacheEntryStreamEx(
        hUrlCacheStream: *mut core::ffi::c_void,  // HANDLE
        qwLocation: u64,  // ULONGLONG
        lpBuffer: *mut (),  // void* out
        lpdwLen: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll")]
public static extern bool ReadUrlCacheEntryStreamEx(IntPtr hUrlCacheStream, ulong qwLocation, IntPtr lpBuffer, ref uint lpdwLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_ReadUrlCacheEntryStreamEx' -Namespace Win32 -PassThru
# $api::ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
#uselib "WININET.dll"
#func global ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" sptr, sptr, sptr, sptr
; ReadUrlCacheEntryStreamEx hUrlCacheStream, qwLocation, lpBuffer, varptr(lpdwLen)   ; 戻り値は stat
; hUrlCacheStream : HANDLE -> "sptr"
; qwLocation : ULONGLONG -> "sptr"
; lpBuffer : void* out -> "sptr"
; lpdwLen : DWORD* in/out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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。
出力引数: 
#uselib "WININET.dll"
#cfunc global ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" sptr, int64, sptr, var
; res = ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
; hUrlCacheStream : HANDLE -> "sptr"
; qwLocation : ULONGLONG -> "int64"
; lpBuffer : void* out -> "sptr"
; lpdwLen : DWORD* 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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。
出力引数: 
; BOOL ReadUrlCacheEntryStreamEx(HANDLE hUrlCacheStream, ULONGLONG qwLocation, void* lpBuffer, DWORD* lpdwLen)
#uselib "WININET.dll"
#cfunc global ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" intptr, int64, intptr, var
; res = ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
; hUrlCacheStream : HANDLE -> "intptr"
; qwLocation : ULONGLONG -> "int64"
; lpBuffer : void* out -> "intptr"
; lpdwLen : DWORD* 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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procReadUrlCacheEntryStreamEx = wininet.NewProc("ReadUrlCacheEntryStreamEx")
)

// hUrlCacheStream (HANDLE), qwLocation (ULONGLONG), lpBuffer (void* out), lpdwLen (DWORD* in/out)
r1, _, err := procReadUrlCacheEntryStreamEx.Call(
	uintptr(hUrlCacheStream),
	uintptr(qwLocation),
	uintptr(lpBuffer),
	uintptr(lpdwLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL
function ReadUrlCacheEntryStreamEx(
  hUrlCacheStream: THandle;   // HANDLE
  qwLocation: UInt64;   // ULONGLONG
  lpBuffer: Pointer;   // void* out
  lpdwLen: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'ReadUrlCacheEntryStreamEx';
result := DllCall("WININET\ReadUrlCacheEntryStreamEx"
    , "Ptr", hUrlCacheStream   ; HANDLE
    , "Int64", qwLocation   ; ULONGLONG
    , "Ptr", lpBuffer   ; void* out
    , "Ptr", lpdwLen   ; DWORD* in/out
    , "Int")   ; return: BOOL
●ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen) = DLL("WININET.dll", "bool ReadUrlCacheEntryStreamEx(void*, qword, void*, void*)")
# 呼び出し: ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
# hUrlCacheStream : HANDLE -> "void*"
# qwLocation : ULONGLONG -> "qword"
# lpBuffer : void* out -> "void*"
# lpdwLen : DWORD* 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)。
const std = @import("std");

extern "wininet" fn ReadUrlCacheEntryStreamEx(
    hUrlCacheStream: ?*anyopaque, // HANDLE
    qwLocation: u64, // ULONGLONG
    lpBuffer: ?*anyopaque, // void* out
    lpdwLen: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;
proc ReadUrlCacheEntryStreamEx(
    hUrlCacheStream: pointer,  # HANDLE
    qwLocation: uint64,  # ULONGLONG
    lpBuffer: pointer,  # void* out
    lpdwLen: ptr uint32  # DWORD* in/out
): int32 {.importc: "ReadUrlCacheEntryStreamEx", stdcall, dynlib: "WININET.dll".}
pragma(lib, "wininet");
extern(Windows)
int ReadUrlCacheEntryStreamEx(
    void* hUrlCacheStream,   // HANDLE
    ulong qwLocation,   // ULONGLONG
    void* lpBuffer,   // void* out
    uint* lpdwLen   // DWORD* in/out
);
ccall((:ReadUrlCacheEntryStreamEx, "WININET.dll"), stdcall, Int32,
      (Ptr{Cvoid}, UInt64, Ptr{Cvoid}, Ptr{UInt32}),
      hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
# hUrlCacheStream : HANDLE -> Ptr{Cvoid}
# qwLocation : ULONGLONG -> UInt64
# lpBuffer : void* out -> Ptr{Cvoid}
# lpdwLen : DWORD* in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t ReadUrlCacheEntryStreamEx(
    void* hUrlCacheStream,
    uint64_t qwLocation,
    void* lpBuffer,
    uint32_t* lpdwLen);
]]
local wininet = ffi.load("wininet")
-- wininet.ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
-- hUrlCacheStream : HANDLE
-- qwLocation : ULONGLONG
-- lpBuffer : void* out
-- lpdwLen : DWORD* 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('WININET.dll');
const ReadUrlCacheEntryStreamEx = lib.func('__stdcall', 'ReadUrlCacheEntryStreamEx', 'int32_t', ['void *', 'uint64_t', 'void *', 'uint32_t *']);
// ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
// hUrlCacheStream : HANDLE -> 'void *'
// qwLocation : ULONGLONG -> 'uint64_t'
// lpBuffer : void* out -> 'void *'
// lpdwLen : DWORD* in/out -> 'uint32_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("WININET.dll", {
  ReadUrlCacheEntryStreamEx: { parameters: ["pointer", "u64", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
// hUrlCacheStream : HANDLE -> "pointer"
// qwLocation : ULONGLONG -> "u64"
// lpBuffer : void* out -> "pointer"
// lpdwLen : DWORD* 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 ReadUrlCacheEntryStreamEx(
    void* hUrlCacheStream,
    uint64_t qwLocation,
    void* lpBuffer,
    uint32_t* lpdwLen);
C, "WININET.dll");
// $ffi->ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen);
// hUrlCacheStream : HANDLE
// qwLocation : ULONGLONG
// lpBuffer : void* out
// lpdwLen : DWORD* 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。
// 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 Wininet extends StdCallLibrary {
    Wininet INSTANCE = Native.load("wininet", Wininet.class);
    boolean ReadUrlCacheEntryStreamEx(
        Pointer hUrlCacheStream,   // HANDLE
        long qwLocation,   // ULONGLONG
        Pointer lpBuffer,   // void* out
        IntByReference lpdwLen   // DWORD* in/out
    );
}
@[Link("wininet")]
lib LibWININET
  fun ReadUrlCacheEntryStreamEx = ReadUrlCacheEntryStreamEx(
    hUrlCacheStream : Void*,   # HANDLE
    qwLocation : UInt64,   # ULONGLONG
    lpBuffer : Void*,   # void* out
    lpdwLen : UInt32*   # DWORD* in/out
  ) : 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 ReadUrlCacheEntryStreamExNative = Int32 Function(Pointer<Void>, Uint64, Pointer<Void>, Pointer<Uint32>);
typedef ReadUrlCacheEntryStreamExDart = int Function(Pointer<Void>, int, Pointer<Void>, Pointer<Uint32>);
final ReadUrlCacheEntryStreamEx = DynamicLibrary.open('WININET.dll')
    .lookupFunction<ReadUrlCacheEntryStreamExNative, ReadUrlCacheEntryStreamExDart>('ReadUrlCacheEntryStreamEx');
// hUrlCacheStream : HANDLE -> Pointer<Void>
// qwLocation : ULONGLONG -> Uint64
// lpBuffer : void* out -> Pointer<Void>
// lpdwLen : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function ReadUrlCacheEntryStreamEx(
  hUrlCacheStream: THandle;   // HANDLE
  qwLocation: UInt64;   // ULONGLONG
  lpBuffer: Pointer;   // void* out
  lpdwLen: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'ReadUrlCacheEntryStreamEx';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "ReadUrlCacheEntryStreamEx"
  c_ReadUrlCacheEntryStreamEx :: Ptr () -> Word64 -> Ptr () -> Ptr Word32 -> IO CInt
-- hUrlCacheStream : HANDLE -> Ptr ()
-- qwLocation : ULONGLONG -> Word64
-- lpBuffer : void* out -> Ptr ()
-- lpdwLen : DWORD* in/out -> Ptr Word32
-- 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 readurlcacheentrystreamex =
  foreign "ReadUrlCacheEntryStreamEx"
    ((ptr void) @-> uint64_t @-> (ptr void) @-> (ptr uint32_t) @-> returning int32_t)
(* hUrlCacheStream : HANDLE -> (ptr void) *)
(* qwLocation : ULONGLONG -> uint64_t *)
(* lpBuffer : void* out -> (ptr void) *)
(* lpdwLen : DWORD* in/out -> (ptr uint32_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 wininet (t "WININET.dll"))
(cffi:use-foreign-library wininet)

(cffi:defcfun ("ReadUrlCacheEntryStreamEx" read-url-cache-entry-stream-ex :convention :stdcall) :int32
  (h-url-cache-stream :pointer)   ; HANDLE
  (qw-location :uint64)   ; ULONGLONG
  (lp-buffer :pointer)   ; void* out
  (lpdw-len :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $ReadUrlCacheEntryStreamEx = Win32::API::More->new('WININET',
    'BOOL ReadUrlCacheEntryStreamEx(HANDLE hUrlCacheStream, UINT64 qwLocation, LPVOID lpBuffer, LPVOID lpdwLen)');
# my $ret = $ReadUrlCacheEntryStreamEx->Call($hUrlCacheStream, $qwLocation, $lpBuffer, $lpdwLen);
# hUrlCacheStream : HANDLE -> HANDLE
# qwLocation : ULONGLONG -> UINT64
# lpBuffer : void* out -> LPVOID
# lpdwLen : DWORD* 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。

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