240 lines
6.1 KiB
C
240 lines
6.1 KiB
C
/*
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* Compound Storage (32 bit version)
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* Storage implementation
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*
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* This file contains the compound file implementation
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* of the storage interface.
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*
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* Copyright 1999 Francis Beaudet
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* Copyright 1999 Sylvain St-Germain
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* Copyright 1999 Thuy Nguyen
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* Copyright 2005 Mike McCormack
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* NOTES
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* The compound file implementation of IStorage used for create
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* and manage substorages and streams within a storage object
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* residing in a compound file object.
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*/
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define COBJMACROS
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#include "windef.h"
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#include "winbase.h"
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#include "winnls.h"
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#include "winuser.h"
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#include "wine/debug.h"
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#include "ole2.h" /* For Write/ReadClassStm */
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#include "winreg.h"
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#include "wine/wingdi16.h"
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WINE_DEFAULT_DEBUG_CHANNEL(storage);
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static const BYTE STORAGE_magic[8] ={0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1};
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/***********************************************************************
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* WriteClassStg [coml2.@]
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*/
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HRESULT WINAPI WriteClassStg(IStorage *pStg, REFCLSID rclsid)
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{
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if (!pStg)
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return E_INVALIDARG;
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if (!rclsid)
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return STG_E_INVALIDPOINTER;
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return IStorage_SetClass(pStg, rclsid);
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}
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/***********************************************************************
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* ReadClassStg (coml2.@)
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*/
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HRESULT WINAPI ReadClassStg(IStorage *pstg, CLSID *pclsid)
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{
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STATSTG pstatstg;
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HRESULT hRes;
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TRACE("(%p, %p)\n", pstg, pclsid);
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if (!pstg || !pclsid)
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return E_INVALIDARG;
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/*
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* read a STATSTG structure (contains the clsid) from the storage
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*/
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hRes = IStorage_Stat(pstg, &pstatstg, STATFLAG_NONAME);
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if (SUCCEEDED(hRes))
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*pclsid = pstatstg.clsid;
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return hRes;
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}
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/***********************************************************************
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* WriteClassStm (coml2.@)
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*/
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HRESULT WINAPI WriteClassStm(IStream *pStm, REFCLSID rclsid)
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{
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TRACE("(%p,%p)\n", pStm, rclsid);
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if (!pStm || !rclsid)
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return E_INVALIDARG;
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return IStream_Write(pStm, rclsid, sizeof(CLSID), NULL);
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}
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/***********************************************************************
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* ReadClassStm (coml2.@)
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*/
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HRESULT WINAPI ReadClassStm(IStream *pStm, CLSID *pclsid)
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{
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ULONG nbByte;
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HRESULT res;
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TRACE("(%p,%p)\n", pStm, pclsid);
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if (!pStm || !pclsid)
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return E_INVALIDARG;
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/* clear the output args */
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*pclsid = CLSID_NULL;
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res = IStream_Read(pStm, pclsid, sizeof(CLSID), &nbByte);
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if (FAILED(res))
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return res;
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if (nbByte != sizeof(CLSID))
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return STG_E_READFAULT;
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else
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return S_OK;
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}
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enum stream_1ole_flags {
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OleStream_LinkedObject = 0x00000001,
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OleStream_Convert = 0x00000004
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};
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/***********************************************************************
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* GetConvertStg (coml2.@)
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*/
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HRESULT WINAPI GetConvertStg(IStorage *stg)
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{
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static const DWORD version_magic = 0x02000001;
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DWORD header[2];
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IStream *stream;
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HRESULT hr;
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TRACE("%p\n", stg);
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if (!stg) return E_INVALIDARG;
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hr = IStorage_OpenStream(stg, L"\1Ole", NULL, STGM_READ | STGM_SHARE_EXCLUSIVE, 0, &stream);
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if (FAILED(hr)) return hr;
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hr = IStream_Read(stream, header, sizeof(header), NULL);
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IStream_Release(stream);
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if (FAILED(hr)) return hr;
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if (header[0] != version_magic)
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{
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ERR("got wrong version magic for 1Ole stream, %#lx.\n", header[0]);
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return E_FAIL;
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}
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return header[1] & OleStream_Convert ? S_OK : S_FALSE;
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}
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/******************************************************************************
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* StgIsStorageILockBytes [coml2.@]
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*/
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HRESULT WINAPI StgIsStorageILockBytes(ILockBytes *plkbyt)
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{
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BYTE sig[sizeof(STORAGE_magic)];
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ULARGE_INTEGER offset;
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ULONG read = 0;
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offset.HighPart = 0;
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offset.LowPart = 0;
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ILockBytes_ReadAt(plkbyt, offset, sig, sizeof(sig), &read);
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if (read == sizeof(sig) && memcmp(sig, STORAGE_magic, sizeof(sig)) == 0)
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return S_OK;
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return S_FALSE;
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}
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/******************************************************************************
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* StgIsStorageFile [coml2.@]
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*/
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HRESULT WINAPI StgIsStorageFile(LPCOLESTR fn)
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{
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HANDLE hf;
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BYTE magic[8];
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DWORD bytes_read;
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TRACE("%s\n", debugstr_w(fn));
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hf = CreateFileW(fn, GENERIC_READ,
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FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (hf == INVALID_HANDLE_VALUE)
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return STG_E_FILENOTFOUND;
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if (!ReadFile(hf, magic, 8, &bytes_read, NULL))
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{
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WARN(" unable to read file\n");
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CloseHandle(hf);
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return S_FALSE;
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}
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CloseHandle(hf);
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if (bytes_read != 8)
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{
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TRACE(" too short\n");
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return S_FALSE;
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}
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if (!memcmp(magic, STORAGE_magic, 8))
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{
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TRACE(" -> YES\n");
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return S_OK;
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}
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TRACE(" -> Invalid header.\n");
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return S_FALSE;
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}
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/******************************************************************************
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* StgCreatePropSetStg [coml2.@]
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*/
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HRESULT WINAPI StgCreatePropSetStg(IStorage *pstg, DWORD reserved, IPropertySetStorage **propset)
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{
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TRACE("%p, %#lx, %p.\n", pstg, reserved, propset);
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if (reserved)
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return STG_E_INVALIDPARAMETER;
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return IStorage_QueryInterface(pstg, &IID_IPropertySetStorage, (void**)propset);
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}
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