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149 lines
3.9 KiB
149 lines
3.9 KiB
/*
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* FDIDLL.C -- FDI interface using CABINET.DLL
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*
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* Microsoft Confidential
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* Copyright (C) Microsoft Corporation 1997
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* All Rights Reserved.
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*
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* Author:
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* Mike Sliger
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*
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* History:
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* 21-Jan-1997 msliger Initial version
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* 24-Jan-1997 msliger Changed to public include file
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*
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* Overview:
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* This code is a wrapper which provides access to the actual FDI code
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* in CABINET.DLL. CABINET.DLL dynamically loads/unloads as needed.
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*/
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#include <windows.h>
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#include "fdi.h"
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static HINSTANCE hCabinetDll; /* DLL module handle */
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/* pointers to the functions in the DLL */
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static HFDI (FAR DIAMONDAPI *pfnFDICreate)(
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PFNALLOC pfnalloc,
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PFNFREE pfnfree,
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PFNOPEN pfnopen,
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PFNREAD pfnread,
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PFNWRITE pfnwrite,
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PFNCLOSE pfnclose,
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PFNSEEK pfnseek,
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int cpuType,
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PERF perf) = NULL;
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static BOOL (FAR DIAMONDAPI *pfnFDIIsCabinet)(
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HFDI hfdi,
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INT_PTR hf,
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PFDICABINETINFO pfdici) = NULL;
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static BOOL (FAR DIAMONDAPI *pfnFDICopy)(
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HFDI hfdi,
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char *pszCabinet,
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char *pszCabPath,
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int flags,
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PFNFDINOTIFY pfnfdin,
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PFNFDIDECRYPT pfnfdid,
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void *pvUser) = NULL;
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static BOOL (FAR DIAMONDAPI *pfnFDIDestroy)(
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HFDI hfdi) = NULL;
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/*
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* FDICreate -- Create an FDI context
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*
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* See fdi_int.h for entry/exit conditions.
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*/
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HFDI FAR DIAMONDAPI FDICreate(PFNALLOC pfnalloc,
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PFNFREE pfnfree,
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PFNOPEN pfnopen,
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PFNREAD pfnread,
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PFNWRITE pfnwrite,
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PFNCLOSE pfnclose,
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PFNSEEK pfnseek,
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int cpuType,
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PERF perf)
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{
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HFDI hfdi;
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hCabinetDll = LoadLibrary(TEXT("CABINET"));
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if (hCabinetDll == NULL)
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{
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return(NULL);
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}
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pfnFDICreate = (void *) GetProcAddress(hCabinetDll,"FDICreate");
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pfnFDICopy = (void *) GetProcAddress(hCabinetDll,"FDICopy");
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pfnFDIIsCabinet = (void *) GetProcAddress(hCabinetDll,"FDIIsCabinet");
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pfnFDIDestroy = (void *) GetProcAddress(hCabinetDll,"FDIDestroy");
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if ((pfnFDICreate == NULL) ||
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(pfnFDICopy == NULL) ||
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(pfnFDIIsCabinet == NULL) ||
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(pfnFDIDestroy == NULL))
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{
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FreeLibrary(hCabinetDll);
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return(NULL);
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}
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hfdi = pfnFDICreate(pfnalloc,pfnfree,
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pfnopen,pfnread,pfnwrite,pfnclose,pfnseek,cpuType,perf);
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if (hfdi == NULL)
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{
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FreeLibrary(hCabinetDll);
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}
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return(hfdi);
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}
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/*
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* FDICopy -- extracts files from a cabinet
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*
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* See fdi_int.h for entry/exit conditions.
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*/
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BOOL FAR DIAMONDAPI FDICopy(HFDI hfdi,
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char *pszCabinet,
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char *pszCabPath,
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int flags,
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PFNFDINOTIFY pfnfdin,
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PFNFDIDECRYPT pfnfdid,
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void *pvUser)
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{
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if (pfnFDICopy == NULL)
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{
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return(FALSE);
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}
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return(pfnFDICopy(hfdi,pszCabinet,pszCabPath,flags,pfnfdin,pfnfdid,pvUser));
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}
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/*
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* FDIDestroy -- Destroy an FDI context
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*
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* See fdi_int.h for entry/exit conditions.
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*/
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BOOL FAR DIAMONDAPI FDIDestroy(HFDI hfdi)
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{
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BOOL rc;
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if (pfnFDIDestroy == NULL)
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{
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return(FALSE);
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}
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rc = pfnFDIDestroy(hfdi);
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if (rc == TRUE)
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{
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FreeLibrary(hCabinetDll);
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}
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return(rc);
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}
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