248 lines
9.6 KiB
C++
248 lines
9.6 KiB
C++
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/*****************************************************************************\
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FILE: dllload.cpp
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DESCRIPTION:
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Delay load functions that we want to use when they are available.
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BryanSt (Bryan Starbuck) - Created
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Copyright (c) 1998-2000 Microsoft Corporation
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\*****************************************************************************/
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#include "priv.h"
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#include <pstore.h>
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#include <wininet.h>
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#pragma warning(disable:4229) // No warnings when modifiers used on data
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// Delay loading mechanism. This allows you to write code as if you are
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// calling implicitly linked APIs, and yet have these APIs really be
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// explicitly linked. You can reduce the initial number of DLLs that
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// are loaded (load on demand) using this technique.
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//
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// Use the following macros to indicate which APIs/DLLs are delay-linked
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// and -loaded.
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//
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// DELAY_LOAD
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// DELAY_LOAD_HRESULT
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// DELAY_LOAD_SAFEARRAY
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// DELAY_LOAD_UINT
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// DELAY_LOAD_INT
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// DELAY_LOAD_VOID
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//
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// Use these macros for APIs that are exported by ordinal only.
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//
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// DELAY_LOAD_ORD
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// DELAY_LOAD_ORD_VOID
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//
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// Use these macros for APIs that only exist on the integrated-shell
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// installations (i.e., a new shell32 is on the system).
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//
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// DELAY_LOAD_SHELL
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// DELAY_LOAD_SHELL_HRESULT
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// DELAY_LOAD_SHELL_VOID
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//
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//
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/**********************************************************************/
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void _GetProcFromDLL(HINSTANCE* phinst, LPCSTR pszDLL, FARPROC* ppfn, LPCSTR pszProc)
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{
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#ifdef DEBUG
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CHAR szProcD[MAX_PATH];
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if (HIWORD(pszProc)) {
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lstrcpynA(szProcD, pszProc, ARRAYSIZE(szProcD));
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} else {
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wnsprintfA(szProcD, ARRAYSIZE(szProcD), "(ordinal %d)", LOWORD(pszProc));
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}
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#endif // DEBUG
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// If it's already loaded, return.
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if (*ppfn) {
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return;
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}
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if (*phinst == NULL) {
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#ifdef DEBUG
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TraceMsg(TF_FTP_DLLLOADING, "DLLLOAD: Loading %hs for the first time for %hs", pszDLL, szProcD);
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/*
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if (g_dwBreakFlags & TF_FTP_DLLLOAD_BREAK)
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{
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DebugBreak();
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}
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*/
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#endif // DEBUG
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*phinst = LoadLibraryA(pszDLL);
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if (*phinst == NULL) {
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return;
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}
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}
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#ifdef DEBUG
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TraceMsg(TF_FTP_DLLLOADING, "DLLLOAD: GetProc'ing %hs from %hs for the first time", pszDLL, szProcD);
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#endif // DEBUG
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*ppfn = GetProcAddress(*phinst, pszProc);
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}
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/*----------------------------------------------------------
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Purpose: Performs a loadlibrary on the DLL only if the machine
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has the integrated shell installation.
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*/
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void _SHGetProcFromDLL(HINSTANCE* phinst, LPCSTR pszDLL, FARPROC* ppfn, LPCSTR pszProc)
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{
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_GetProcFromDLL(phinst, pszDLL, ppfn, pszProc);
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}
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#define DELAY_LOAD_MAP(_hinst, _dll, _ret, _fnpriv, _fn, _args, _nargs, _err) \
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_ret __stdcall _fnpriv _args \
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{ \
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static _ret (* __stdcall _pfn##_fn) _args = NULL; \
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_GetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, #_fn); \
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if (_pfn##_fn) \
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return _pfn##_fn _nargs; \
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return (_ret)_err; \
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}
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#define DELAY_MAP_HRESULT(_hinst, _dll, _fnpriv, _fn, _args, _nargs) DELAY_LOAD_MAP(_hinst, _dll, HRESULT, _fnpriv, _fn, _args, _nargs, E_FAIL)
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#define DELAY_MAP_DWORD(_hinst, _dll, _fnpriv, _fn, _args, _nargs) DELAY_LOAD_MAP(_hinst, _dll, DWORD, _fnpriv, _fn, _args, _nargs, 0)
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#define DELAY_MAP_BOOL(_hinst, _dll, _fnpriv, _fn, _args, _nargs) DELAY_LOAD_MAP(_hinst, _dll, BOOL, _fnpriv, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_ERR(_hinst, _dll, _ret, _fn, _args, _nargs, _err) DELAY_LOAD_MAP(_hinst, _dll, _ret, _fn, _fn, _args, _nargs, _err)
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#define DELAY_LOAD(_hinst, _dll, _ret, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, _ret, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_HRESULT(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, HRESULT, _fn, _args, _nargs, E_FAIL)
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#define DELAY_LOAD_SAFEARRAY(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, SAFEARRAY *, _fn, _args, _nargs, NULL)
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#define DELAY_LOAD_DWORD(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, DWORD, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_BOOL(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, BOOL, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_UINT(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, UINT, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_INT(_hinst, _dll, _fn, _args, _nargs) DELAY_LOAD_ERR(_hinst, _dll, INT, _fn, _args, _nargs, 0)
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#define DELAY_LOAD_VOID(_hinst, _dll, _fn, _args, _nargs) \
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void __stdcall _fn _args \
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{ \
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static void (* __stdcall _pfn##_fn) _args = NULL; \
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_GetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, #_fn); \
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if (_pfn##_fn) \
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_pfn##_fn _nargs; \
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return; \
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}
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//
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// For private entrypoints exported by ordinal.
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//
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#define DELAY_LOAD_ORD_ERR(_hinst, _dll, _ret, _fn, _ord, _args, _nargs, _err) \
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_ret __stdcall _fn _args \
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{ \
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static _ret (* __stdcall _pfn##_fn) _args = NULL; \
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_GetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, (LPCSTR)_ord); \
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if (_pfn##_fn) \
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return _pfn##_fn _nargs; \
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return (_ret)_err; \
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}
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#define DELAY_LOAD_ORD(_hinst, _dll, _ret, _fn, _ord, _args, _nargs) DELAY_LOAD_ORD_ERR(_hinst, _dll, _ret, _fn, _ord, _args, _nargs, 0)
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#define DELAY_LOAD_ORD_HRESULT(_hinst, _dll, _fn, _ord, _args, _nargs) DELAY_LOAD_ORD(_hinst, _dll, HRESULT, _fn, _ord, _args, _nargs)
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#define DELAY_LOAD_ORD_VOID(_hinst, _dll, _fn, _ord, _args, _nargs) \
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void __stdcall _fn _args \
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{ \
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static void (* __stdcall _pfn##_fn) _args = NULL; \
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_GetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, (LPCSTR)_ord); \
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if (_pfn##_fn) \
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_pfn##_fn _nargs; \
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return; \
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}
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//
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// Private exports by ordinal for integrated-shell installs
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//
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#define DELAY_LOAD_SHELL_ERR(_hinst, _dll, _ret, _fn, _ord, _args, _nargs, _err) \
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_ret __stdcall _fn _args \
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{ \
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static _ret (* __stdcall _pfn##_fn) _args = NULL; \
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_SHGetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, (LPCSTR)_ord); \
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if (_pfn##_fn) \
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return _pfn##_fn _nargs; \
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return (_ret)_err; \
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}
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#define DELAY_LOAD_SHELL(_hinst, _dll, _ret, _fn, _ord, _args, _nargs) DELAY_LOAD_SHELL_ERR(_hinst, _dll, _ret, _fn, _ord, _args, _nargs, 0)
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#define DELAY_LOAD_SHELL_HRESULT(_hinst, _dll, _fn, _ord, _args, _nargs) DELAY_LOAD_SHELL_ERR(_hinst, _dll, HRESULT, _fn, _ord, _args, _nargs, E_FAIL)
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#define DELAY_LOAD_SHELL_VOID(_hinst, _dll, _fn, _ord, _args, _nargs) \
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void __stdcall _fn _args \
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{ \
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static void (* __stdcall _pfn##_fn) _args = NULL; \
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_SHGetProcFromDLL(&_hinst, #_dll, (FARPROC*)&_pfn##_fn, (LPCSTR)_ord); \
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if (_pfn##_fn) \
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_pfn##_fn _nargs; \
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return; \
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}
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/**********************************************************************/
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/**********************************************************************/
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// --------- MLANG.DLL ---------------
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HINSTANCE g_hinstMLANG = NULL;
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DELAY_LOAD_HRESULT(g_hinstMLANG, MLANG.DLL, ConvertINetMultiByteToUnicode,
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(LPDWORD lpdwMode, DWORD dwEncoding, LPCSTR lpSrcStr, LPINT lpnMultiCharCount, LPWSTR lpDstStr, LPINT lpnWideCharCount),
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(lpdwMode, dwEncoding, lpSrcStr, lpnMultiCharCount, lpDstStr, lpnWideCharCount));
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DELAY_LOAD_HRESULT(g_hinstMLANG, MLANG.DLL, ConvertINetUnicodeToMultiByte,
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(LPDWORD lpdwMode, DWORD dwEncoding, LPCWSTR lpSrcStr, LPINT lpnWideCharCount, LPSTR lpDstStr, LPINT lpnMultiCharCount),
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(lpdwMode, dwEncoding, lpSrcStr, lpnWideCharCount, lpDstStr, lpnMultiCharCount));
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DELAY_LOAD_HRESULT(g_hinstMLANG, MLANG.DLL, LcidToRfc1766W,
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(LCID Locale, LPWSTR pszRfc1766, int nChar),
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(Locale, pszRfc1766, nChar));
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// --------- MSHTML.DLL ---------------
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HINSTANCE g_hinstMSHTML = NULL;
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DELAY_LOAD_HRESULT(g_hinstMSHTML, MSHTML.DLL, ShowHTMLDialog,
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(HWND hwnd, IMoniker * pmk, VARIANT * pvarArgIn, LPWSTR pchOptions, VARIANT * pvarArgOut),
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(hwnd, pmk, pvarArgIn, pchOptions, pvarArgOut));
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// --------- CRYPT32.DLL ---------------
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HINSTANCE g_hinstCRYPT32 = NULL;
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DELAY_MAP_BOOL(g_hinstCRYPT32, CRYPT32.DLL, _CryptProtectData, CryptProtectData,
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(DATA_BLOB *pDataIn, LPCWSTR pszDataDescr, DATA_BLOB * pOptionalEntropy, PVOID pvReserved, CRYPTPROTECT_PROMPTSTRUCT *pPromptStruct, DWORD dwFlags, DATA_BLOB *pDataOut),
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(pDataIn, pszDataDescr, pOptionalEntropy, pvReserved, pPromptStruct, dwFlags, pDataOut));
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DELAY_MAP_BOOL(g_hinstCRYPT32, CRYPT32.DLL, _CryptUnprotectData, CryptUnprotectData,
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(DATA_BLOB *pDataIn, LPWSTR *ppszDataDescr, DATA_BLOB * pOptionalEntropy, PVOID pvReserved, CRYPTPROTECT_PROMPTSTRUCT *pPromptStruct, DWORD dwFlags, DATA_BLOB *pDataOut),
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(pDataIn, ppszDataDescr, pOptionalEntropy, pvReserved, pPromptStruct, dwFlags, pDataOut));
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// --------- SHELL32.DLL ---------------
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HINSTANCE g_hinstSHELL32 = NULL;
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DELAY_LOAD_ORD_HRESULT(g_hinstSHELL32, SHELL32.DLL, _SHCreateShellFolderView, SHCreateShellFolderViewORD,
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(const SFV_CREATE* pcsfv, LPSHELLVIEW FAR* ppsv),
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(pcsfv, ppsv));
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DELAY_MAP_HRESULT(g_hinstSHELL32, SHELL32.DLL, _SHPathPrepareForWriteW, SHPathPrepareForWriteW,
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(HWND hwnd, IUnknown *punkEnableModless, LPCWSTR pwzPath, DWORD dwFlags),
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(hwnd, punkEnableModless, pwzPath, dwFlags));
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#pragma warning(default:4229)
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