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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "storlckb.hxx"
+
+#include <sal/types.h>
+#include <rtl/string.h>
+#include <rtl/ref.hxx>
+#include <osl/mutex.hxx>
+
+#include <store/types.h>
+
+#include "storbase.hxx"
+#include "stordata.hxx"
+#include "storpage.hxx"
+
+using namespace store;
+
+/*========================================================================
+ *
+ * OStoreLockBytes implementation.
+ *
+ *======================================================================*/
+const sal_uInt32 OStoreLockBytes::m_nTypeId(0x94190310);
+
+/*
+ * OStoreLockBytes.
+ */
+OStoreLockBytes::OStoreLockBytes()
+ : m_xManager (),
+ m_xNode (),
+ m_bWriteable (false)
+{
+}
+
+/*
+ * ~OStoreLockBytes.
+ */
+OStoreLockBytes::~OStoreLockBytes()
+{
+ if (m_xManager.is() && m_xNode.is())
+ {
+ m_xManager->releasePage(m_xNode->m_aDescr);
+ }
+}
+
+/*
+ * isKindOf.
+ */
+bool OStoreLockBytes::isKindOf (sal_uInt32 nTypeId)
+{
+ return (nTypeId == m_nTypeId);
+}
+
+/*
+ * create.
+ */
+storeError OStoreLockBytes::create (
+ OStorePageManager *pManager,
+ rtl_String const *pPath,
+ rtl_String const *pName,
+ storeAccessMode eMode)
+{
+ rtl::Reference<OStorePageManager> xManager (pManager);
+ if (!xManager.is())
+ return store_E_InvalidAccess;
+
+ if (!(pPath && pName))
+ return store_E_InvalidParameter;
+
+ OStoreDirectoryPageObject aPage;
+ storeError eErrCode = xManager->iget (
+ aPage, STORE_ATTRIB_ISFILE,
+ pPath, pName, eMode);
+ if (eErrCode != store_E_None)
+ return eErrCode;
+
+ if (!(aPage.attrib() & STORE_ATTRIB_ISFILE))
+ {
+ // No ISFILE in older versions (backward compatibility).
+ if (aPage.attrib() & STORE_ATTRIB_ISLINK)
+ return store_E_NotFile;
+ }
+
+ inode_holder_type xNode (aPage.get());
+ if (eMode != storeAccessMode::ReadOnly)
+ eErrCode = xManager->acquirePage (xNode->m_aDescr, storeAccessMode::ReadWrite);
+ else
+ eErrCode = xManager->acquirePage (xNode->m_aDescr, storeAccessMode::ReadOnly);
+ if (eErrCode != store_E_None)
+ return eErrCode;
+
+ m_xManager = xManager;
+ m_xNode = xNode;
+ m_bWriteable = (eMode != storeAccessMode::ReadOnly);
+
+ // Check for truncation.
+ if (eMode == storeAccessMode::Create)
+ {
+ // Truncate to zero length.
+ eErrCode = setSize(0);
+ }
+ return eErrCode;
+}
+
+/*
+ * readAt.
+ */
+storeError OStoreLockBytes::readAt (
+ sal_uInt32 nOffset,
+ void *pBuffer,
+ sal_uInt32 nBytes,
+ sal_uInt32 &rnDone)
+{
+ rnDone = 0;
+
+ if (!m_xManager.is())
+ return store_E_InvalidAccess;
+
+ if (!pBuffer)
+ return store_E_InvalidParameter;
+ if (!nBytes)
+ return store_E_None;
+
+ // Acquire exclusive access.
+ osl::MutexGuard aGuard (*m_xManager);
+
+ // Determine data length.
+ OStoreDirectoryPageObject aPage (m_xNode.get());
+
+ sal_uInt32 nDataLen = aPage.dataLength();
+ if ((nOffset + nBytes) > nDataLen)
+ nBytes = nDataLen - nOffset;
+
+ // Read data.
+ OStoreDataPageObject aData;
+ sal_uInt8 *pData = static_cast<sal_uInt8*>(pBuffer);
+ while ((0 < nBytes) && (nOffset < nDataLen))
+ {
+ // Determine 'Offset' scope.
+ inode::ChunkScope eScope = m_xNode->scope (nOffset);
+ if (eScope == inode::SCOPE_INTERNAL)
+ {
+ // Read from inode page (internal scope).
+ inode::ChunkDescriptor aDescr (
+ nOffset, m_xNode->capacity());
+
+ sal_uInt32 nLength = sal_uInt32(aDescr.m_nLength);
+ if(nLength > nBytes)
+ {
+ nLength = nBytes;
+ }
+ memcpy (
+ &pData[rnDone],
+ &m_xNode->m_pData[aDescr.m_nOffset],
+ nLength);
+
+ // Adjust counters.
+ rnDone += nLength;
+ nOffset += nLength;
+ nBytes -= nLength;
+ }
+ else
+ {
+ // Read from data page (external scope).
+ inode::ChunkDescriptor aDescr (
+ nOffset - m_xNode->capacity(), OStoreDataPageData::capacity(m_xNode->m_aDescr)); // @@@
+
+ sal_uInt32 nLength = sal_uInt32(aDescr.m_nLength);
+ if(nLength > nBytes)
+ {
+ nLength = nBytes;
+ }
+
+ storeError eErrCode = aPage.read (aDescr.m_nPage, aData, *m_xManager);
+ if (eErrCode != store_E_None)
+ {
+ if (eErrCode != store_E_NotExists)
+ return eErrCode;
+
+ memset (
+ &pData[rnDone],
+ 0,
+ nLength);
+ }
+ else
+ {
+ PageHolderObject< data > xData (aData.makeHolder<data>());
+ memcpy (
+ &pData[rnDone],
+ &xData->m_pData[aDescr.m_nOffset],
+ nLength);
+ }
+
+ // Adjust counters.
+ rnDone += nLength;
+ nOffset += nLength;
+ nBytes -= nLength;
+ }
+ }
+
+ // Done.
+ return store_E_None;
+}
+
+/*
+ * writeAt.
+ */
+storeError OStoreLockBytes::writeAt (
+ sal_uInt32 nOffset,
+ const void *pBuffer,
+ sal_uInt32 nBytes,
+ sal_uInt32 &rnDone)
+{
+ rnDone = 0;
+
+ if (!m_xManager.is())
+ return store_E_InvalidAccess;
+ if (!m_bWriteable)
+ return store_E_AccessViolation;
+
+ if (!pBuffer)
+ return store_E_InvalidParameter;
+ if (!nBytes)
+ return store_E_None;
+
+ // Acquire exclusive access.
+ osl::MutexGuard aGuard (*m_xManager);
+
+ // Write data.
+ OStoreDirectoryPageObject aPage (m_xNode.get());
+ const sal_uInt8 *pData = static_cast<const sal_uInt8*>(pBuffer);
+
+ storeError eErrCode = store_E_None;
+ while (nBytes > 0)
+ {
+ // Determine 'Offset' scope.
+ inode::ChunkScope eScope = m_xNode->scope (nOffset);
+ if (eScope == inode::SCOPE_INTERNAL)
+ {
+ // Write to inode page (internal scope).
+ inode::ChunkDescriptor aDescr (
+ nOffset, m_xNode->capacity());
+
+ sal_uInt32 nLength = sal_uInt32(aDescr.m_nLength);
+ if(nLength > nBytes)
+ {
+ nLength = nBytes;
+ }
+
+ memcpy (
+ &m_xNode->m_pData[aDescr.m_nOffset],
+ &pData[rnDone], nLength);
+
+ // Mark inode dirty.
+ aPage.touch();
+
+ // Adjust counters.
+ rnDone += nLength;
+ nOffset += nLength;
+ nBytes -= nLength;
+
+ // Adjust data length.
+ if (aPage.dataLength() < nOffset)
+ aPage.dataLength (nOffset);
+ }
+ else
+ {
+ // Write to data page (external scope).
+ OStoreDataPageObject aData;
+
+ inode::ChunkDescriptor aDescr (
+ nOffset - m_xNode->capacity(), OStoreDataPageData::capacity(m_xNode->m_aDescr)); // @@@
+
+ sal_uInt32 nLength = sal_uInt32(aDescr.m_nLength);
+ if ((aDescr.m_nOffset > 0) || (nBytes < nLength))
+ {
+ // Unaligned. Need to load/create data page.
+// @@@ loadOrCreate()
+ eErrCode = aPage.read (aDescr.m_nPage, aData, *m_xManager);
+ if (eErrCode != store_E_None)
+ {
+ if (eErrCode != store_E_NotExists)
+ return eErrCode;
+
+ eErrCode = aData.construct<data>(m_xManager->allocator());
+ if (eErrCode != store_E_None)
+ return eErrCode;
+ }
+ }
+
+ PageHolderObject< data > xData (aData.makeHolder<data>());
+ if (!xData.is())
+ {
+ eErrCode = aData.construct<data>(m_xManager->allocator());
+ if (eErrCode != store_E_None)
+ return eErrCode;
+ xData = aData.makeHolder<data>();
+ }
+
+ // Modify data page.
+ if(nLength > nBytes)
+ {
+ nLength = nBytes;
+ }
+ memcpy (
+ &xData->m_pData[aDescr.m_nOffset],
+ &pData[rnDone], nLength);
+
+ // Save data page.
+ eErrCode = aPage.write (aDescr.m_nPage, aData, *m_xManager);
+ if (eErrCode != store_E_None)
+ return eErrCode;
+
+ // Adjust counters.
+ rnDone += nLength;
+ nOffset += nLength;
+ nBytes -= nLength;
+
+ // Adjust data length.
+ if (aPage.dataLength() < nOffset)
+ aPage.dataLength (nOffset);
+ }
+ }
+
+ // Check for modified inode.
+ if (aPage.dirty())
+ return m_xManager->saveObjectAt (aPage, aPage.location());
+ else
+ return store_E_None;
+}
+
+/*
+ * setSize.
+ */
+storeError OStoreLockBytes::setSize (sal_uInt32 nSize)
+{
+ if (!m_xManager.is())
+ return store_E_InvalidAccess;
+ if (!m_bWriteable)
+ return store_E_AccessViolation;
+
+ // Acquire exclusive access.
+ osl::MutexGuard aGuard (*m_xManager);
+
+ // Determine current length.
+ OStoreDirectoryPageObject aPage (m_xNode.get());
+ sal_uInt32 nDataLen = aPage.dataLength();
+
+ if (nSize == nDataLen)
+ return store_E_None;
+
+ if (nSize < nDataLen)
+ {
+ // Truncate.
+ storeError eErrCode = store_E_None;
+
+ // Determine 'Size' scope.
+ inode::ChunkScope eSizeScope = m_xNode->scope (nSize);
+ if (eSizeScope == inode::SCOPE_INTERNAL)
+ {
+ // Internal 'Size' scope. Determine 'Data' scope.
+ inode::ChunkScope eDataScope = m_xNode->scope (nDataLen);
+ if (eDataScope == inode::SCOPE_EXTERNAL)
+ {
+ // External 'Data' scope. Truncate all external data pages.
+ eErrCode = aPage.truncate (0, *m_xManager);
+ if (eErrCode != store_E_None)
+ return eErrCode;
+ }
+
+ // Truncate internal data page.
+ inode::ChunkDescriptor aDescr (nSize, m_xNode->capacity());
+ memset (
+ &(m_xNode->m_pData[aDescr.m_nOffset]),
+ 0, aDescr.m_nLength);
+ }
+ else
+ {
+ // External 'Size' scope. Truncate external data pages.
+ inode::ChunkDescriptor aDescr (
+ nSize - m_xNode->capacity(), OStoreDataPageData::capacity(m_xNode->m_aDescr)); // @@@
+
+ sal_uInt32 nPage = aDescr.m_nPage;
+ if (aDescr.m_nOffset) nPage += 1;
+
+ eErrCode = aPage.truncate (nPage, *m_xManager);
+ if (eErrCode != store_E_None)
+ return eErrCode;
+ }
+ }
+
+ // Set (extended or truncated) size.
+ aPage.dataLength (nSize);
+
+ // Save modified inode.
+ return m_xManager->saveObjectAt (aPage, aPage.location());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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