485 lines
14 KiB
C++
485 lines
14 KiB
C++
// Copyright (C) 1997 Microsoft Corporation. All rights reserved.
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#include "header.h"
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#include "fs.h"
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static const WCHAR txtwUncompressed[] = L"uncompressed";
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CFileSystem::CFileSystem()
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{
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m_pITStorage = NULL;
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m_pStorage = NULL;
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m_szPathName[0] = 0;
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}
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CFileSystem::~CFileSystem()
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{
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ReleaseObjPtr(m_pStorage);
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ReleaseObjPtr(m_pITStorage);
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}
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HRESULT CFileSystem::Init(void)
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{
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if (! m_pITStorage) {
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IClassFactory* pICFITStorage;
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HRESULT hr = CoGetClassObject(CLSID_ITStorage, CLSCTX_INPROC_SERVER, NULL, IID_IClassFactory, (void **) &pICFITStorage);
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if (!SUCCEEDED(hr))
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return hr;
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hr = pICFITStorage->CreateInstance(NULL, IID_ITStorage,(void **) &m_pITStorage);
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ReleaseObjPtr( pICFITStorage );
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if (!SUCCEEDED(hr))
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return hr;
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}
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return S_OK;
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}
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typedef struct tagITSControlData
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{
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UINT cdwFollowing; // Must be 6 or 13
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DWORD cdwITFS_Control; // Must be 5
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DWORD dwMagicITS; // Must be MAGIC_ITSFS_CONTROL (see below)
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DWORD dwVersionITS; // Must be 1
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DWORD cbDirectoryBlock; // Size in bytes of directory blocks (Default is 8192)
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DWORD cMinCacheEntries; // Least upper bound on the number of directory blocks
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// which we'll cache in memory. (Default is 20)
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DWORD fFlags; // Control bit flags (see below).
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// Default value is fDefaultIsCompression.
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UINT cdwControlData; // Must be 6
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DWORD dwLZXMagic; // Must be LZX_MAGIC (see below)
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DWORD dwVersion; // Must be 2
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DWORD dwMulResetBlock; // Number of blocks between compression resets. (Default: 4)
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DWORD dwMulWindowSize; // Maximum number of blocks kept in data history (Default: 4)
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DWORD dwMulSecondPartition; // Granularity in blocks of sliding history(Default: 2)
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DWORD dwOptions; // Option flags (Default: fOptimizeCodeStreams)
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} ITCD;
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HRESULT CFileSystem::Create( PCSTR pszPathName )
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{
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HRESULT hr;
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ITCD itcd;
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if (! m_pITStorage || m_pStorage )
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return E_FAIL;
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itcd.cdwFollowing = 13;
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itcd.cdwITFS_Control = 5;
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itcd.dwMagicITS = MAGIC_ITSFS_CONTROL;
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itcd.dwVersionITS = 1;
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itcd.cbDirectoryBlock = 4096; // default = 8192
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itcd.cMinCacheEntries = 10; // default = 20
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itcd.fFlags = 1; // 0 == Uncompressed, 1 == Compressed.
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itcd.cdwControlData = 6;
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itcd.dwLZXMagic = LZX_MAGIC;
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itcd.dwVersion = 2;
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itcd.dwMulResetBlock = 2; // Default = 4
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itcd.dwMulWindowSize = 2; // Default = 4
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itcd.dwMulSecondPartition = 1; // Default = 2
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itcd.dwOptions = 0; // Default = fOptimizeCodeStreams
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m_pITStorage->SetControlData(PITS_Control_Data(&itcd));
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WCHAR wsz[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, (PWSTR) wsz, MAX_PATH);
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hr = m_pITStorage->StgCreateDocfile( (LPCWSTR) wsz, STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_DIRECT, 0, &m_pStorage);
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if (!SUCCEEDED(hr)) {
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return hr;
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}
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strcpy( (LPSTR) m_szPathName, pszPathName );
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return S_OK;
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}
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// NOTE: The below function is required for the ITIR full-text indexer to
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// initialize. I'm working to find out why this is and what impact
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// the below has on the file system.
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//
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HRESULT CFileSystem::CreateUncompressed( PCSTR pszPathName )
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{
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HRESULT hr;
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ITCD itcd;
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if (! m_pITStorage || m_pStorage )
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return E_FAIL;
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itcd.cdwFollowing = 6;
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itcd.cdwITFS_Control = 5;
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itcd.dwMagicITS = MAGIC_ITSFS_CONTROL;
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itcd.dwVersionITS = 1;
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itcd.cbDirectoryBlock = 8192; // default = 8192
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itcd.cMinCacheEntries = 20; // default = 20
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itcd.fFlags = 0; // 0 == Uncompressed, 1 == Compressed.
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m_pITStorage->SetControlData(PITS_Control_Data(&itcd));
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WCHAR wsz[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, (PWSTR) wsz, MAX_PATH);
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hr = m_pITStorage->StgCreateDocfile( (LPCWSTR) wsz, STGM_CREATE | STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_DIRECT, 0, &m_pStorage);
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if (!SUCCEEDED(hr)) {
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return hr;
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}
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strcpy( (LPSTR) m_szPathName, pszPathName );
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return S_OK;
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}
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HRESULT CFileSystem::Open(PCSTR pszPathName, DWORD dwAccess)
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{
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HRESULT hr = S_OK;
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if (! m_pITStorage || m_pStorage )
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return E_FAIL;
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// force access modes
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if( (dwAccess & STGM_WRITE) || (dwAccess & STGM_READWRITE) ) {
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dwAccess &= ~STGM_WRITE;
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dwAccess |= STGM_READWRITE | STGM_SHARE_EXCLUSIVE;
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}
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else
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dwAccess |= STGM_SHARE_DENY_WRITE;
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WCHAR wsz[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, (PWSTR) wsz, MAX_PATH);
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hr = m_pITStorage->StgOpenStorage( (LPCWSTR) wsz, NULL, dwAccess, NULL, 0, &m_pStorage);
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if (!SUCCEEDED(hr)) {
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return hr;
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}
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strcpy( (LPSTR) m_szPathName, pszPathName );
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return hr;
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}
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HRESULT CFileSystem::Compact(LPCSTR pszPathName)
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{
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WCHAR wszPathName[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, wszPathName, sizeof(wszPathName));
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m_pITStorage->Compact(wszPathName, COMPACT_DATA_AND_PATH);
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return S_OK;
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}
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HRESULT CFileSystem::Close()
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{
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ReleaseObjPtr(m_pStorage);
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return S_OK;
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}
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//////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Here are a set of "sub" file I/O calls.
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//
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//
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CSubFileSystem::CSubFileSystem(CFileSystem* pFS)
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{
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m_pFS = pFS;
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m_pStorage = NULL;
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m_pStream = NULL;
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m_szPathName[0] = 0;
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}
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CSubFileSystem::~CSubFileSystem()
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{
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if ( m_pStorage && (m_pStorage != m_pFS->m_pStorage) )
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ReleaseObjPtr(m_pStorage);
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ReleaseObjPtr(m_pStream);
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}
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HRESULT CSubFileSystem::CreateSub(PCSTR pszPathName)
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{
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PCSTR pszFilePortion;
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HRESULT hr;
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if ( m_pStorage || m_pStream )
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return E_FAIL;
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if ((pszFilePortion = FindFilePortion(pszPathName)) && pszFilePortion > pszPathName)
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{
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CHAR szPath[MAX_PATH];
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strcpy( szPath, pszPathName );
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szPath[(pszFilePortion - 1) - pszPathName] = '\0';
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WCHAR wszStorage[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, szPath, -1, (PWSTR) wszStorage, MAX_PATH);
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hr = m_pFS->m_pStorage->OpenStorage(wszStorage, NULL, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, NULL, 0, &m_pStorage);
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if (!SUCCEEDED(hr) || !m_pStorage) // storage didn't exist, so create it
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hr = m_pFS->m_pStorage->CreateStorage(wszStorage, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, &m_pStorage);
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if (!SUCCEEDED(hr))
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{
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return hr;
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}
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}
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else // no folder, so store the file in the root
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{
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m_pStorage = m_pFS->m_pStorage;
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pszFilePortion = pszPathName;
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}
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WCHAR wszStream[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszFilePortion, -1, (PWSTR) wszStream, MAX_PATH);
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hr = m_pStorage->CreateStream(wszStream, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, &m_pStream);
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if (!SUCCEEDED(hr))
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{
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if (m_pStorage != m_pFS->m_pStorage)
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ReleaseObjPtr(m_pStorage);
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return hr;
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}
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// Needed for delete.
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strcpy( m_szPathName, pszFilePortion );
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return S_OK;
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}
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HRESULT CSubFileSystem::CreateUncompressedSub(PCSTR pszPathName)
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{
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PCSTR pszFilePortion;
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HRESULT hr;
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IStorageITEx* pIStorageEx;
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if ( m_pStorage || m_pStream )
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return E_FAIL;
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if ((pszFilePortion = FindFilePortion(pszPathName)) && pszFilePortion > pszPathName)
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{
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CHAR szPath[MAX_PATH];
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strcpy( szPath, pszPathName );
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szPath[(pszFilePortion - 1) - pszPathName] = '\0';
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WCHAR wszStorage[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, szPath, -1, (PWSTR) wszStorage, MAX_PATH);
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hr = m_pFS->m_pStorage->OpenStorage(wszStorage, NULL, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, NULL, 0, &m_pStorage);
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if (!SUCCEEDED(hr) || !m_pStorage) // storage didn't exist, so create it
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hr = m_pFS->m_pStorage->CreateStorage(wszStorage, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, &m_pStorage);
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if (!SUCCEEDED(hr))
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{
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return hr;
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}
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}
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else // no folder, so store the file in the root
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{
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m_pStorage = m_pFS->m_pStorage;
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pszFilePortion = pszPathName;
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}
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if ( !(SUCCEEDED(hr = m_pStorage->QueryInterface(IID_IStorageITEx, (void**)&pIStorageEx))) )
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pIStorageEx = (IStorageITEx*)m_pStorage; // BUGBUG the QI call above should work!
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WCHAR wszStream[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszFilePortion, -1, (PWSTR) wszStream, MAX_PATH);
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hr = pIStorageEx->CreateStreamITEx(wszStream, txtwUncompressed, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, (IStreamITEx**)&m_pStream);
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ReleaseObjPtr(pIStorageEx);
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if (!SUCCEEDED(hr))
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{
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if (m_pStorage != m_pFS->m_pStorage)
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ReleaseObjPtr(m_pStorage);
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return hr;
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}
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// Needed for delete.
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strcpy( m_szPathName, pszFilePortion );
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return S_OK;
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}
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HRESULT CSubFileSystem::CreateSystemFile(PCSTR pszPathName)
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{
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m_pStorage = m_pFS->m_pStorage;
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WCHAR wszStream[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, (PWSTR) wszStream, MAX_PATH);
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HRESULT hr = m_pStorage->CreateStream(wszStream, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, &m_pStream);
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if (!SUCCEEDED(hr))
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{
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return hr;
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}
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// Needed for delete.
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strcpy( m_szPathName, pszPathName );
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return S_OK;
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}
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HRESULT CSubFileSystem::CreateUncompressedSystemFile(PCSTR pszPathName)
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{
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IStorageITEx* pIStorageEx;
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HRESULT hr;
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m_pStorage = m_pFS->m_pStorage;
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if ( !(SUCCEEDED(hr = m_pStorage->QueryInterface(IID_IStorageITEx, (void**)&pIStorageEx))) )
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pIStorageEx = (IStorageITEx*)m_pStorage; // BUGBUG the QI call above should work!
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WCHAR wszStream[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszPathName, -1, (PWSTR) wszStream, MAX_PATH);
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hr = pIStorageEx->CreateStreamITEx(wszStream, txtwUncompressed, STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, 0, (IStreamITEx**)&m_pStream);
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ReleaseObjPtr(pIStorageEx);
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if (!SUCCEEDED(hr))
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{
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return hr;
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}
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// Needed for delete.
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strcpy( m_szPathName, pszPathName );
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return S_OK;
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}
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HRESULT CSubFileSystem::OpenSub(PCSTR pszPathName, DWORD dwAccess)
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{
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PCSTR pszFilePortion;
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HRESULT hr;
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if ( m_pStorage || m_pStream )
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return E_FAIL;
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// force access modes
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if( (dwAccess & STGM_WRITE) || (dwAccess & STGM_READWRITE) ) {
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dwAccess &= ~STGM_WRITE;
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dwAccess |= STGM_READWRITE | STGM_SHARE_EXCLUSIVE;
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}
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else
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dwAccess |= STGM_SHARE_DENY_WRITE;
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if ((pszFilePortion = FindFilePortion(pszPathName)) &&
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pszFilePortion > pszPathName + 2) // +2 to support / && ./
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{
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CHAR szPath[MAX_PATH];
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strcpy( szPath, pszPathName );
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szPath[(pszFilePortion - 1) - pszPathName] = '\0';
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WCHAR wszStorage[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, szPath, -1, (PWSTR) wszStorage, MAX_PATH);
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hr = m_pFS->m_pStorage->OpenStorage(wszStorage, NULL, dwAccess, NULL, 0, &m_pStorage);
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if (!SUCCEEDED(hr))
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{
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return hr;
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}
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}
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else // no folder, so store the file in the root
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{
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m_pStorage = m_pFS->m_pStorage ? m_pFS->m_pStorage : m_pFS->m_pStorage;
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pszFilePortion = pszPathName;
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}
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WCHAR wszStream[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, pszFilePortion, -1, (PWSTR) wszStream, MAX_PATH);
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hr = m_pStorage->OpenStream(wszStream, NULL, dwAccess, 0, &m_pStream);
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if (!SUCCEEDED(hr))
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{
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if (m_pStorage != m_pFS->m_pStorage)
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ReleaseObjPtr(m_pStorage);
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return hr;
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}
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// Needed for delete.
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strcpy( m_szPathName, pszFilePortion );
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return S_OK;
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}
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ULONG CSubFileSystem::WriteSub(const void* pData, int cb)
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{
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if ( !m_pStorage || !m_pStream )
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return (ULONG) -1;
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ULONG cbWritten;
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HRESULT hr = m_pStream->Write(pData, cb, &cbWritten);
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if (!SUCCEEDED(hr) || (cbWritten != (ULONG)cb) )
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{
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return (ULONG) -1;
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}
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// REVIEW: 30-May-1997 [ralphw] Why are we returning this? We fail if
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// we don't write cb bytes.
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return cbWritten;
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}
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/*
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* iOrigin:
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* 0 = Seek from beginning.
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* 1 = Seek from current.
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* 2 = Seek from end.
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*/
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ULONG CSubFileSystem::SeekSub(int cb, int iOrigin)
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{
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LARGE_INTEGER liCount = {0,0};
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ULARGE_INTEGER liNewPos;
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if ( !m_pStorage || !m_pStream )
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return (ULONG) -1;
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liCount.LowPart = cb;
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HRESULT hr = m_pStream->Seek(liCount, iOrigin, &liNewPos);
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if (!SUCCEEDED(hr) )
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{
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return (ULONG) -1;
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}
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return liNewPos.LowPart;
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}
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//
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// Pre-allocate the size of the stream.
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//
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HRESULT CSubFileSystem::SetSize(unsigned uSize)
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{
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ULARGE_INTEGER liSize = {0,0};
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HRESULT hr;
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if ( !m_pStorage || !m_pStream )
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return E_FAIL;
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liSize.LowPart = uSize;
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hr = m_pStream->SetSize(liSize);
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if (!SUCCEEDED(hr) )
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{
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return (ULONG) -1;
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}
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return hr;
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}
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//
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// Delete substorage.
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//
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HRESULT
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CSubFileSystem::DeleteSub()
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{
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if (m_pStorage)
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{
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if (m_pStream)
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{
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// Release the stream.
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ReleaseObjPtr(m_pStream) ;
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}
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// Now delete the storage.
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WCHAR element[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, m_szPathName, -1, (PWSTR) element, MAX_PATH);
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HRESULT hr = m_pStorage->DestroyElement(element) ;
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if (SUCCEEDED(hr))
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{
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// Get back to the constructor state.
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if ( m_pStorage && (m_pStorage != m_pFS->m_pStorage) )
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{
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ReleaseObjPtr(m_pStorage);
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}
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return S_OK ;
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}
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}
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return S_OK ;
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}
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