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DragonNest/Common/ZipArchive/ZipCentralDir.cpp
Cussrro e4714f3f0e 初步修复
2024-12-19 09:48:26 +08:00

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////////////////////////////////////////////////////////////////////////////////
// This source file is part of the ZipArchive library source distribution and
// is Copyrighted 2000 - 2012 by Artpol Software - Tadeusz Dracz
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// For the licensing details refer to the License.txt file.
//
// Web Site: http://www.artpol-software.com
////////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
//#include <string>
#include "ZipCentralDir.h"
#include "ZipArchive.h"
#include "ZipFileMapping.h"
#include "ZipPlatform.h"
#include "BytesWriter.h"
#define CENTRAL_DIR_END_SIZE 22
// needed also for checking when Zip64 is disabled
#define CENTRAL_DIR_END64_LOCATOR_SIZE 20
using namespace ZipArchiveLib;
char CZipCentralDir::m_gszSignature[] = {0x50, 0x4b, 0x05, 0x06};
char CZipCentralDir::m_gszSignature64Locator[] = {0x50, 0x4b, 0x06, 0x07};
CZipCentralDir::CZipCentralDir()
{
m_pInfo = NULL;
m_pHeaders = NULL;
m_pFindArray = NULL;
m_pOpenedFile = NULL;
m_iIgnoredChecks = 0;
m_specialFlags = CZipArchive::sfNone;
InitUnicode();
}
void CZipCentralDir::InitUnicode()
{
#ifdef _ZIP_UNICODE_CUSTOM
m_iUnicodeMode = CZipArchive::umCustom;
#else
m_iUnicodeMode = CZipArchive::umNone;
#endif
}
void CZipCentralDir::InitOnCreate(CZipArchive* pArchive)
{
m_pArchive = pArchive;
m_pStorage = pArchive->GetStorage();
}
void CZipCentralDir::Init(CZipCentralDir* pSource)
{
m_pOpenedFile = NULL;
m_iIgnoredChecks = CZipArchive::checkIgnoredByDefault;
// just in case
DestroySharedData();
if (pSource != NULL)
{
#ifdef _ZIP_USE_LOCKING
pSource->LockAccess();
#endif
m_pInfo = pSource->m_pInfo;
m_pInfo->m_iReference++;
m_pHeaders = pSource->m_pHeaders;
m_pFindArray = pSource->m_pFindArray;
#ifdef _ZIP_USE_LOCKING
// points to the same object now
UnlockAccess();
#endif
m_pStorage->UpdateSegmMode(m_pInfo->m_uLastVolume);
m_pStorage->m_uBytesBeforeZip = pSource->m_pStorage->m_uBytesBeforeZip;
}
else
CreateSharedData();
}
CZipCentralDir::~CZipCentralDir()
{
DestroySharedData();
}
void CZipCentralDir::Read()
{
if (!m_pStorage)
{
ASSERT(FALSE);
return;
}
ZIP_FILE_USIZE location = LocateSignature();
if (location == CZipStorage::SignatureNotFound)
ThrowError(CZipException::cdirNotFound);
bool isBinary = m_pStorage->IsBinarySplit();
if (!isBinary)
{
m_pInfo->m_uEndOffset = (ZIP_SIZE_TYPE)location;
m_pStorage->m_pFile->SafeSeek((ZIP_FILE_USIZE)(m_pInfo->m_uEndOffset + 4));
}
else
{
ZIP_FILE_USIZE uPos = m_pStorage->m_pFile->GetPosition();
ASSERT(uPos > location);
m_pStorage->SeekInBinary(-(ZIP_FILE_SIZE)(uPos - location) + 4);
m_pInfo->m_uEndOffset = m_pStorage->GetPosition() - 4;
}
CZipAutoBuffer buf(CENTRAL_DIR_END_SIZE - 4);
// we can skip the signature, we already know it is good - it was found
m_pStorage->Read(buf, CENTRAL_DIR_END_SIZE - 4, true);
WORD uCommentSize;
CBytesWriter::ReadBytes(m_pInfo->m_uLastVolume, buf, 2);
CBytesWriter::ReadBytes(m_pInfo->m_uVolumeWithCD, buf + 2, 2);
CBytesWriter::ReadBytes(m_pInfo->m_uVolumeEntriesNo,buf + 4, 2);
CBytesWriter::ReadBytes(m_pInfo->m_uEntriesNumber,buf + 6, 2);
CBytesWriter::ReadBytes(m_pInfo->m_uSize, buf + 8, 4);
CBytesWriter::ReadBytes(m_pInfo->m_uOffset, buf + 12, 4);
CBytesWriter::ReadBytes(uCommentSize, buf + 16);
buf.Release();
if (uCommentSize)
{
m_pInfo->m_pszComment.Allocate(uCommentSize);
m_pStorage->Read(m_pInfo->m_pszComment, uCommentSize, true);
}
if (m_pInfo->NeedsZip64())
{
if (isBinary || m_pInfo->m_uEndOffset >= CENTRAL_DIR_END64_LOCATOR_SIZE)
{
if (isBinary)
m_pStorage->SeekInBinary(-CENTRAL_DIR_END_SIZE - uCommentSize - CENTRAL_DIR_END64_LOCATOR_SIZE);
else
m_pStorage->m_pFile->SafeSeek((ZIP_FILE_USIZE)(m_pInfo->m_uEndOffset) - CENTRAL_DIR_END64_LOCATOR_SIZE);
char buf[4];
m_pStorage->Read(buf, 4, true);
if (memcmp(buf, m_gszSignature64Locator, 4) == 0)
ThrowError(CZipException::noZip64);
}
// when the zip64 locator is not found, try to treat this archive as normal
}
// if m_uLastVolume is not zero, it is enough to say that it is a multi-volume archive unless it is a binary split archive
if (IsConsistencyCheckOn(CZipArchive::checkVolumeEntries))
if (!((!m_pInfo->m_uLastVolume && (m_pInfo->m_uEntriesNumber == m_pInfo->m_uVolumeEntriesNo) && !m_pInfo->m_uVolumeWithCD)
|| m_pInfo->m_uLastVolume))
ThrowError(CZipException::badZipFile);
m_pStorage->UpdateSegmMode(m_pInfo->m_uLastVolume);
if (!m_pStorage->IsSegmented() && !m_pInfo->CheckIfOK_1())
ThrowError(CZipException::badZipFile);
if (m_pStorage->m_uBytesBeforeZip == 0 && m_pInfo->m_uLastVolume == 0)
m_pStorage->m_uBytesBeforeZip = m_pInfo->CalculateBytesBeforeZip();
if (!m_pInfo->CheckIfOK_2())
ThrowError(CZipException::badZipFile);
m_pInfo->m_bInArchive = true;
m_pStorage->ChangeVolume(m_pInfo->m_uVolumeWithCD);
if (!m_pInfo->m_uSize)
return;
ReadHeaders();
}
void CZipCentralDir::ThrowError(int err) const
{
CZipException::Throw(err, m_pStorage->m_pFile->GetFilePath());
}
void CZipCentralDir::ReadHeaders()
{
if (!m_pStorage->IsBinarySplit())
m_pStorage->Seek(m_pInfo->m_uOffset);
else
m_pStorage->SeekInBinary(m_pInfo->m_uOffset, true);
RemoveHeaders(); //just in case
for (ZIP_INDEX_TYPE i = 0; i < m_pInfo->m_uEntriesNumber; i++)
{
CZipFileHeader* pHeader = new CZipFileHeader(this);
m_pHeaders->Add(pHeader);
if (!pHeader->Read(true))
ThrowError(CZipException::badZipFile);
}
if (m_specialFlags.IsSetAny(CZipArchive::sfExhaustiveRead))
{
ZIP_FILE_USIZE uPosition = m_pStorage->GetPosition();
// different offset, or different parts
if (uPosition != m_pInfo->m_uEndOffset || m_pStorage->IsSegmented() && !m_pStorage->IsBinarySplit() && m_pStorage->GetCurrentVolume() != m_pInfo->m_uLastVolume)
for(;;)
{
CZipAutoBuffer buf(4);
m_pStorage->Read(buf, 4, true);
if (!CZipFileHeader::VerifySignature(buf))
break;
CZipFileHeader* pHeader = new CZipFileHeader(this);
m_pHeaders->Add(pHeader);
if (!pHeader->Read(false))
ThrowError(CZipException::badZipFile);
}
}
// this is necessary when removing data descriptors, CZipArchive::MakeSpaceForReplace, deleting, replacing or encrypting files
// sort always, to yield the same results in requesting files by index regardless of the reason for opening
m_pHeaders->Sort(CompareHeaders);
RebuildFindFastArray();
}
void CZipCentralDir::Close()
{
m_pOpenedFile = NULL;
DestroySharedData();
// do not reference it anymore
m_pInfo = NULL;
m_pHeaders = NULL;
m_pFindArray = NULL;
m_specialFlags = CZipArchive::sfNone;
InitUnicode();
}
bool CZipCentralDir::IsValidIndex(ZIP_INDEX_TYPE uIndex)const
{
return uIndex < (ZIP_INDEX_TYPE)m_pHeaders->GetSize() && uIndex != ZIP_FILE_INDEX_UNSPECIFIED;
}
void CZipCentralDir::OpenFile(ZIP_INDEX_TYPE uIndex)
{
CZipFileHeader* pOpenedFile = (*this)[uIndex];
if (!pOpenedFile->ReadLocal(this))
ThrowError(CZipException::badZipFile);
m_pOpenedFile = pOpenedFile;
}
void CZipCentralDir::CloseFile(bool skipCheckingDataDescriptor)
{
if (!m_pOpenedFile)
return;
if (!skipCheckingDataDescriptor && IsConsistencyCheckOn(CZipArchive::checkDataDescriptor)
&& !m_pOpenedFile->CheckDataDescriptor(m_pStorage))
ThrowError(CZipException::badZipFile);
m_pOpenedFile = NULL;
}
// add new header using the argument as a template
CZipFileHeader* CZipCentralDir::AddNewFile(const CZipFileHeader & header, ZIP_INDEX_TYPE uReplaceIndex, int iLevel, bool bRichHeaderTemplateCopy)
{
// copy some of the template data
m_pOpenedFile = NULL;
ZIP_INDEX_TYPE uIndex;
CZipFileHeader* pHeader = new CZipFileHeader(this);
try
{
pHeader->m_uMethod = header.m_uMethod;
pHeader->m_uModDate = header.m_uModDate;
pHeader->m_uModTime = header.m_uModTime;
pHeader->m_uExternalAttr = header.m_uExternalAttr;
pHeader->m_uLocalComprSize = header.m_uLocalComprSize;
pHeader->m_uLocalUncomprSize = header.m_uLocalUncomprSize;
pHeader->m_uLocalHeaderSize = header.m_uLocalHeaderSize;
pHeader->m_fileName = header.m_fileName;
pHeader->m_comment = header.m_comment;
pHeader->m_aLocalExtraData = header.m_aLocalExtraData;
// local will be removed in a moment in PrepareData
pHeader->m_aCentralExtraData = header.m_aCentralExtraData;
pHeader->m_aCentralExtraData.RemoveInternalHeaders();
pHeader->m_iSystemCompatibility = header.m_iSystemCompatibility;
pHeader->m_uEncryptionMethod = header.m_uEncryptionMethod;
pHeader->UpdateStringsFlags(false);
#ifdef _ZIP_UNICODE_CUSTOM
// current settings
pHeader->m_stringSettings = GetStringStoreSettings();
#endif
// set only when adding a new file, not in PrepareData (which may be called under different circumstances)
// we need the proper encryption method to be set already
RemoveFromDisk();
bool bReplace = IsValidIndex(uReplaceIndex);
pHeader->PrepareData(iLevel, m_pStorage->IsSegmented());
if (bRichHeaderTemplateCopy)
{
// call here, because PrepareData will zero them
pHeader->m_uCrc32 = header.m_uCrc32;
pHeader->m_uComprSize = header.m_uComprSize;
pHeader->m_uUncomprSize = header.m_uUncomprSize;
}
// now that everything is all right, we can add the new file
if (bReplace)
{
// PrepareStringBuffers was called in CZipArchive::OpenNewFile
// the local extra field is updated if needed, so we can check the lengths
if (!pHeader->CheckLengths(true))
ThrowError(CZipException::tooLongData);
CZipFileHeader* pfh = (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)uReplaceIndex];
m_pStorage->Seek(pfh->m_uOffset);
RemoveFile(pfh, uReplaceIndex, false);
m_pHeaders->InsertAt((ZIP_ARRAY_SIZE_TYPE)uReplaceIndex, pHeader);
m_pOpenedFile = pHeader;
uIndex = uReplaceIndex;
}
else
{
uIndex = (ZIP_INDEX_TYPE)m_pHeaders->Add(pHeader);
m_pOpenedFile = pHeader;
m_pStorage->m_pFile->SeekToEnd();
}
}
catch(...)
{
// otherwise it is added to the collection and will be auto-deleted
if (pHeader != NULL && m_pOpenedFile == NULL)
delete pHeader;
throw;
}
if (m_pInfo->m_bFindFastEnabled)
InsertFindFastElement(pHeader, uIndex); // GetCount > 0, because we have just added a header
m_pInfo->m_iLastIndexAdded = uIndex;
return pHeader;
}
void CZipCentralDir::SetComment(LPCTSTR lpszComment, UINT codePage)
{
ZipCompatibility::ConvertStringToBuffer(lpszComment, m_pInfo->m_pszComment, codePage);
RemoveFromDisk();
}
void CZipCentralDir::RemoveFromDisk()
{
if (m_pInfo->m_bInArchive)
{
ASSERT(!m_pStorage->IsSegmented()); // you can't add files to an existing segmented archive or to delete them from it
m_pStorage->m_pFile->SetLength((ZIP_FILE_USIZE)(m_pStorage->m_uBytesBeforeZip + m_pInfo->m_uOffset));
m_pInfo->m_bInArchive = false;
}
else
m_pStorage->Flush(); // if remove from disk is requested, then the archive modification will follow, so flush the buffers
}
void CZipCentralDir::CloseNewFile()
{
m_pOpenedFile->OnNewFileClose(m_pStorage);
m_pOpenedFile = NULL;
}
void CZipCentralDir::Write()
{
if (m_pInfo->m_bInArchive)
return;
m_pInfo->m_uEntriesNumber = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
if (!m_pStorage->IsSegmented())
{
m_pStorage->Flush();
m_pStorage->m_pFile->SeekToEnd();
}
// else
// we are at the end already
m_pInfo->m_uSize = 0;
bool bDontAllowVolumeChange = false;
if (m_pStorage->IsSegmented())
{
// segmentation signature at the beginning (4 bytes) + the size of the data descr. for each file
ZIP_SIZE_TYPE uSize = GetSize(true);
// if there is a segmented archive in creation and it is only one-volume,
// (current volume number is 0 so far, no bytes has been written so we know they are
// all in the buffer) make sure that it will be after writing central dir
// and make it a not segmented archive
if (m_pStorage->GetCurrentVolume() == 0)
{
// calculate the size of data descriptors already in the buffer or on the disk
// (they will be removed in the not segmented archive).
ZIP_SIZE_TYPE uToGrow = uSize - 4;
for (ZIP_INDEX_TYPE i = 0; i < m_pInfo->m_uEntriesNumber; i++)
{
CZipFileHeader* pHeader = (*this)[i];
if (pHeader->NeedsDataDescriptor())
{
if (!pHeader->IsEncrypted())
uToGrow -= 4; // remove the signature only
}
else
uToGrow -= pHeader->GetDataDescriptorSize(true);
}
ZIP_SIZE_TYPE uVolumeFree = m_pStorage->VolumeLeft();
if (uVolumeFree >= uToGrow)
// lets make sure it will be one-volume archive
{
// can the operation be done only in the buffer?
if (!m_pStorage->m_uBytesWritten && // no bytes on the disk yet
(m_pStorage->GetFreeInBuffer() >= uToGrow)) // is the buffer big enough?
{
RemoveDataDescr(true);
bDontAllowVolumeChange = true; // if a volume change occurs somehow, we'll throw an error later
}
else
{
m_pStorage->Flush();
if (RemoveDataDescr(false))
bDontAllowVolumeChange = true; // if a volume change occurs somehow, we'll throw an error later
}
}
}
// make sure that in a segmented archive, the whole central directory will fit on the single volume
if (!bDontAllowVolumeChange && !m_pStorage->IsBinarySplit())
m_pStorage->AssureFree(uSize);
}
try
{
WriteHeaders(bDontAllowVolumeChange || !m_pStorage->IsSegmented());
WriteCentralEnd();
if (bDontAllowVolumeChange)
{
if (m_pStorage->GetCurrentVolume() != 0)
ThrowError(CZipException::badZipFile);
}
}
catch (...)
{
if (bDontAllowVolumeChange)
{
m_pStorage->FinalizeSegm();
m_pInfo->m_uLastVolume = 0;
}
throw;
}
m_pInfo->m_bInArchive = true;
}
void CZipCentralDir::WriteHeaders(bool bOneDisk)
{
CZipActionCallback* pCallback = m_pArchive->GetCallback(CZipActionCallback::cbSave);
m_pInfo->m_uVolumeEntriesNo = 0;
bool binarySplit = m_pStorage->IsBinarySplit();
if (binarySplit)
{
m_pStorage->AssureFree(1);
m_pInfo->m_uVolumeWithCD = 0;
}
else
m_pInfo->m_uVolumeWithCD = m_pStorage->GetCurrentVolume();
m_pInfo->m_uOffset = m_pStorage->GetPosition();
if (!m_pInfo->m_uEntriesNumber)
return;
ZIP_VOLUME_TYPE uDisk = m_pStorage->GetCurrentVolume();
if (pCallback)
{
pCallback->Init();
pCallback->SetTotal(m_pInfo->m_uEntriesNumber);
}
int iAborted = 0;
if (m_pInfo->m_uEntriesNumber > 0)
{
ZIP_INDEX_TYPE uLast = (ZIP_INDEX_TYPE)(m_pInfo->m_uEntriesNumber - 1);
ZIP_INDEX_TYPE i = 0;
for (;;)
{
CZipFileHeader* pHeader = (*this)[i];
m_pInfo->m_uSize += pHeader->Write(m_pStorage);
if (!binarySplit && m_pStorage->GetCurrentVolume() != uDisk)
{
m_pInfo->m_uVolumeEntriesNo = 1;
uDisk = m_pStorage->GetCurrentVolume();
// update the information about the offset and starting volume if the
// first header was written in the new volume
if (i == 0)
{
m_pInfo->m_uOffset = 0;
m_pInfo->m_uVolumeWithCD = uDisk;
}
}
else
m_pInfo->m_uVolumeEntriesNo++;
if (pCallback)
{
bool ret, last;
if (i == uLast)
{
ret = pCallback->RequestLastCallback(1);
last = true;
}
else
{
ret = pCallback->RequestCallback();
last = false;
}
if (ret)
{
if (last)
break;
}
else
{
if (bOneDisk)
{
ASSERT(!m_pStorage->IsSegmented());
// if segmented, would need to m_pStorage->Flush(), but the headers can span multiple volumes
m_pStorage->EmptyWriteBuffer();
// remove saved part from the volume
m_pStorage->m_pFile->SetLength((ZIP_FILE_USIZE)(m_pStorage->m_uBytesBeforeZip + m_pInfo->m_uOffset));
// We can now abort safely
iAborted = CZipException::abortedSafely;
}
else
iAborted = CZipException::abortedAction;
break;
}
}
else if (i == uLast)
break;
i++;
}
}
if (pCallback)
{
pCallback->CallbackEnd();
if (iAborted)
ThrowError(iAborted);
}
}
void CZipCentralDir::WriteCentralEnd()
{
ZIP_SIZE_TYPE uSize = CENTRAL_DIR_END_SIZE + m_pInfo->m_pszComment.GetSize();
CZipAutoBuffer buf((DWORD)uSize);
char* pBuf = buf;
ZIP_VOLUME_TYPE uDisk = m_pStorage->GetCurrentVolume();
if (m_pStorage->IsSegmented())
{
// update the volume number
if (m_pStorage->IsBinarySplit())
{
m_pStorage->AssureFree(1);
m_pInfo->m_uLastVolume = 0;
}
else
{
m_pStorage->AssureFree(uSize);
m_pInfo->m_uLastVolume = m_pStorage->GetCurrentVolume();
}
}
if (m_pInfo->m_uLastVolume != uDisk && !m_pStorage->IsBinarySplit())
m_pInfo->m_uVolumeEntriesNo = 0;
WORD uCommentSize = (WORD)m_pInfo->m_pszComment.GetSize();
memcpy(pBuf, m_gszSignature, 4);
CBytesWriter::WriteBytes(pBuf + 4, CBytesWriter::WriteSafeU16(m_pInfo->m_uLastVolume));
CBytesWriter::WriteBytes(pBuf + 6, CBytesWriter::WriteSafeU16(m_pInfo->m_uVolumeWithCD));
CBytesWriter::WriteBytes(pBuf + 8, CBytesWriter::WriteSafeU16(m_pInfo->m_uVolumeEntriesNo));
CBytesWriter::WriteBytes(pBuf + 10, CBytesWriter::WriteSafeU16(m_pInfo->m_uEntriesNumber));
CBytesWriter::WriteBytes(pBuf + 12, CBytesWriter::WriteSafeU32(m_pInfo->m_uSize));
CBytesWriter::WriteBytes(pBuf + 16, CBytesWriter::WriteSafeU32(m_pInfo->m_uOffset));
CBytesWriter::WriteBytes(pBuf + 20, uCommentSize);
memcpy(pBuf + 22, m_pInfo->m_pszComment, uCommentSize);
if (uSize > (DWORD)(-1))
CZipException::Throw(CZipException::internalError);
m_pStorage->Write(buf, (DWORD)uSize, true);
}
void CZipCentralDir::RemoveAll()
{
m_pInfo->m_iLastIndexAdded = ZIP_FILE_INDEX_UNSPECIFIED;
ClearFindFastArray();
RemoveHeaders();
}
ZIP_INDEX_TYPE CZipCentralDir::RemoveFindFastElement(CZipFileHeader* pHeader, bool bShift)
{
// FindFileNameIndex(pHeader->GetFileName()) will not work as the file might have been just renamed
ZIP_ARRAY_SIZE_TYPE count = m_pFindArray->GetSize();
for (ZIP_ARRAY_SIZE_TYPE i = 0; i < count; i++)
{
CZipFindFast* pFindFast = (*m_pFindArray)[i];
if (pFindFast->m_pHeader == pHeader)
{
ZIP_INDEX_TYPE uElementIndex = pFindFast->m_uIndex;
delete pFindFast;
m_pFindArray->RemoveAt((ZIP_ARRAY_SIZE_TYPE)i);
// shift down the indexes
if (bShift)
{
ZIP_INDEX_TYPE uSize = (ZIP_INDEX_TYPE)m_pFindArray->GetSize();
for (ZIP_INDEX_TYPE j = 0; j < uSize; j++)
{
if ((*m_pFindArray)[(ZIP_ARRAY_SIZE_TYPE)j]->m_uIndex > uElementIndex)
(*m_pFindArray)[(ZIP_ARRAY_SIZE_TYPE)j]->m_uIndex--;
}
}
return uElementIndex;
}
}
ASSERT(FALSE);
return ZIP_FILE_INDEX_NOT_FOUND;
}
void CZipCentralDir::RemoveFile(CZipFileHeader* pHeader, ZIP_INDEX_TYPE uIndex, bool bShift)
{
if (uIndex == ZIP_FILE_INDEX_UNSPECIFIED)
{
// we need to know the index to remove
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
if (pHeader == (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i])
{
uIndex = i;
break;
}
}
ASSERT(uIndex != ZIP_FILE_INDEX_UNSPECIFIED || pHeader);
if (!pHeader)
pHeader = (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)uIndex];
if (m_pInfo->m_bFindFastEnabled)
{
RemoveFindFastElement(pHeader, bShift);
}
if (uIndex != ZIP_FILE_INDEX_UNSPECIFIED)
{
delete pHeader;
m_pHeaders->RemoveAt((ZIP_ARRAY_SIZE_TYPE)uIndex);
if (m_pInfo->m_iLastIndexAdded != ZIP_FILE_INDEX_UNSPECIFIED)
{
if (m_pInfo->m_iLastIndexAdded == uIndex)
m_pInfo->m_iLastIndexAdded = ZIP_FILE_INDEX_UNSPECIFIED;
else if (m_pInfo->m_iLastIndexAdded > uIndex)
m_pInfo->m_iLastIndexAdded--;
}
}
}
void CZipCentralDir::RemoveLastFile(CZipFileHeader* pHeader, ZIP_INDEX_TYPE uIndex)
{
if (uIndex == ZIP_FILE_INDEX_UNSPECIFIED)
{
if (m_pHeaders->GetSize() == 0)
return;
uIndex = (ZIP_VOLUME_TYPE)(m_pHeaders->GetSize() - 1);
}
if (!pHeader)
pHeader = (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)uIndex];
ZIP_SIZE_TYPE uNewSize = pHeader->m_uOffset + m_pStorage->m_uBytesBeforeZip;
// then remove
RemoveFile(pHeader, uIndex);
m_pStorage->Flush();
m_pStorage->m_pFile->SetLength((ZIP_FILE_USIZE)uNewSize);
m_pInfo->m_bInArchive = false; // it is true when AutoFlush is set to true
}
ZIP_SIZE_TYPE CZipCentralDir::GetSize(bool bWhole) const
{
ZIP_SIZE_TYPE uTotal = CENTRAL_DIR_END_SIZE + m_pInfo->m_pszComment.GetSize();
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
if (bWhole)
{
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
{
const CZipFileHeader* pHeader = (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i];
uTotal += pHeader->GetSize();
}
}
return uTotal;
}
bool CZipCentralDir::RemoveDataDescr(bool bFromBuffer)
{
// this will not work if there are bytes before zip
CZipFileMapping fm;
char* pFile;
ZIP_SIZE_TYPE uSize;
if (bFromBuffer)
{
uSize = m_pStorage->m_uBytesInWriteBuffer;
pFile = m_pStorage->m_pWriteBuffer;
}
else
{
uSize = (ZIP_SIZE_TYPE)m_pStorage->m_pFile->GetLength();
// we cannot use CZipMemFile in multi-volume archive
// so it must be CZipFile
if (!fm.CreateMapping(static_cast<CZipFile*>(m_pStorage->m_pFile)))
return false;
pFile = fm.GetMappedMemory();
}
ZIP_SIZE_TYPE uOffsetToChange = 4;
ZIP_SIZE_TYPE uPosInBuffer = 0;
WORD uExtraHeaderLen;
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
{
CZipFileHeader* pHeader = (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i];
char* pSource = pFile + pHeader->m_uOffset;
if (pHeader->NeedsDataDescriptor())
uExtraHeaderLen = (WORD)(pHeader->IsEncrypted() ? 0 : 4);
else
{
uExtraHeaderLen = pHeader->GetDataDescriptorSize(true);
// removing data descriptor
pHeader->m_uFlag &= ~8;
// update local header:
// write modified flag in the local header
CBytesWriter::WriteBytes(pSource + 6, pHeader->m_uFlag);
pHeader->WriteSmallDataDescriptor(pSource + 14, false);
}
ZIP_SIZE_TYPE uToCopy = (i == (uCount - 1) ? uSize : (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)(i + 1)]->m_uOffset)
- pHeader->m_uOffset - uExtraHeaderLen;
if (uToCopy > 0)
// TODO: [postponed] the size_t limit on uToCopy, but creating such a big segment is unlikely (at least at the moment of writing)
memmove(pFile + uPosInBuffer, pSource, (size_t)uToCopy);
uPosInBuffer += uToCopy;
pHeader->m_uOffset -= uOffsetToChange;
uOffsetToChange += uExtraHeaderLen;
}
if (bFromBuffer)
m_pStorage->m_uBytesInWriteBuffer = (DWORD)uPosInBuffer;
else
{
m_pStorage->m_uBytesWritten = uPosInBuffer;
fm.RemoveMapping();
m_pStorage->m_pFile->SetLength((ZIP_FILE_USIZE)uPosInBuffer);
}
return true;
}
void CZipCentralDir::RemoveHeaders()
{
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
delete (*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i];
m_pHeaders->RemoveAll();
}
void CZipCentralDir::BuildFindFastArray( bool bCaseSensitive )
{
ClearFindFastArray();
m_pInfo->m_bCaseSensitive = bCaseSensitive;
// for later
m_pInfo->m_pCompare = GetCZipStrCompFunc(bCaseSensitive);
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
m_pFindArray->Add(new CZipFindFast((*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i], i));
m_pFindArray->Sort(bCaseSensitive ? CompareFindFastCollate : CompareFindFastCollateNoCase);
}
void CZipCentralDir::EnableFindFast(bool bEnable, bool bCaseSensitive)
{
if (m_pInfo->m_bFindFastEnabled == bEnable)
return;
m_pInfo->m_bFindFastEnabled = bEnable;
if (bEnable)
BuildFindFastArray(bCaseSensitive);
else
m_pFindArray->RemoveAll();
}
ZIP_INDEX_TYPE CZipCentralDir::FindFile(LPCTSTR lpszFileName, bool bCaseSensitive, bool bSporadically, bool bFileNameOnly)
{
if (!m_pInfo->m_bFindFastEnabled)
EnableFindFast(true, bSporadically ? !bCaseSensitive : bCaseSensitive);
ZIP_INDEX_TYPE uResult = ZIP_FILE_INDEX_NOT_FOUND;
if (bFileNameOnly)
{
// a non-effective search (treat an array as unsorted)
// set the proper compare function
ZIPSTRINGCOMPARE pCompare = bCaseSensitive == m_pInfo->m_bCaseSensitive ? m_pInfo->m_pCompare : GetCZipStrCompFunc(bCaseSensitive);
ZIP_INDEX_TYPE uSize = (ZIP_INDEX_TYPE)m_pFindArray->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uSize; i++)
{
CZipString sz = (*m_pFindArray)[(ZIP_ARRAY_SIZE_TYPE)i]->m_pHeader->GetFileName();
CZipPathComponent::RemoveSeparators(sz); // to find a dir
CZipPathComponent zpc(sz);
sz = zpc.GetFileName();
if ((sz.*pCompare)(lpszFileName) == 0)
{
uResult = i;
break;
}
}
}
else if (bCaseSensitive == m_pInfo->m_bCaseSensitive)
uResult = FindFileNameIndex(lpszFileName);
else
{
if (bSporadically)
{
// a non-effective search (treat an array as unsorted)
// do not use m_pInfo->m_pCompare, as it may be shared
ZIPSTRINGCOMPARE pCompare = GetCZipStrCompFunc(bCaseSensitive);
ZIP_INDEX_TYPE uSize = (ZIP_INDEX_TYPE)m_pFindArray->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uSize; i++)
if (((*m_pFindArray)[(ZIP_ARRAY_SIZE_TYPE)i]->m_pHeader->GetFileName().*pCompare)(lpszFileName) == 0)
{
uResult = i;
break;
}
}
else
{
BuildFindFastArray(bCaseSensitive);
uResult = FindFileNameIndex(lpszFileName);
}
}
return uResult == ZIP_FILE_INDEX_NOT_FOUND ? ZIP_FILE_INDEX_NOT_FOUND : (*m_pFindArray)[(ZIP_ARRAY_SIZE_TYPE)uResult]->m_uIndex;
}
ZIP_INDEX_TYPE CZipCentralDir::InsertFindFastElement(CZipFileHeader* pHeader, ZIP_INDEX_TYPE uIndex)
{
CZipString fileName = pHeader->GetFileName();
ZIP_ARRAY_SIZE_TYPE uSize = m_pFindArray->GetSize();
// Our initial binary search range encompasses the entire array of filenames:
ZIP_ARRAY_SIZE_TYPE start = 0;
ZIP_ARRAY_SIZE_TYPE end = uSize;
// Keep halving our search range until we find the right place
// to insert the new element:
while ( start < end )
{
// Find the midpoint of the search range:
ZIP_ARRAY_SIZE_TYPE midpoint = ( start + end ) / 2;
// Compare the filename with the filename at the midpoint of the current search range:
int result = CompareElement(fileName, (ZIP_INDEX_TYPE)midpoint);
// If our filename is larger, it must fall in the first half of the search range:
if ( result > 0 )
{
end = midpoint;
}
// If it's smaller, it must fall in the last half:
else if ( result < 0 )
{
start = midpoint + 1;
}
// If they're equal, we can go ahead and insert here:
else
{
start = midpoint;
break;
}
}
m_pFindArray->InsertAt(start, new CZipFindFast(pHeader, uIndex == ZIP_FILE_INDEX_UNSPECIFIED ? (ZIP_INDEX_TYPE)uSize : uIndex /* just in case */));
return (ZIP_INDEX_TYPE)start;
}
ZIP_INDEX_TYPE CZipCentralDir::FindFileNameIndex(LPCTSTR lpszFileName) const
{
ZIP_ARRAY_SIZE_TYPE start = 0;
ZIP_ARRAY_SIZE_TYPE end = m_pFindArray->GetSize();
if (end == 0)
return ZIP_FILE_INDEX_NOT_FOUND;
else
end--;
// Keep halving our search range until we find the given element:
while ( start <= end )
{
// Find the midpoint of the search range:
ZIP_ARRAY_SIZE_TYPE midpoint = ( start + end ) / 2;
// Compare the given filename with the filename at the midpoint of the search range:
int result = CompareElement(lpszFileName, (ZIP_INDEX_TYPE)midpoint);
// If our filename is smaller, it must fall in the first half of the search range:
if ( result > 0 )
{
if (midpoint == 0)
return ZIP_FILE_INDEX_NOT_FOUND;
end = midpoint - 1;
}
// If it's larger, it must fall in the last half:
else if ( result < 0 )
{
start = midpoint + 1;
}
// If they're equal, return the result:
else
{
return (ZIP_INDEX_TYPE)midpoint;
}
}
// Signal failure:
return ZIP_FILE_INDEX_NOT_FOUND;
}
void CZipCentralDir::GetComment(CZipString& szComment) const
{
ZipCompatibility::ConvertBufferToString(szComment, m_pInfo->m_pszComment, ZipCompatibility::GetDefaultCommentCodePage(m_pArchive->GetSystemCompatibility()));
}
#ifdef _ZIP_UNICODE_CUSTOM
const CZipStringStoreSettings& CZipCentralDir::GetStringStoreSettings() const
{
return m_pArchive->GetStringStoreSettings();
}
#endif
bool CZipCentralDir::OnFileNameChange(CZipFileHeader* pHeader)
{
bool result;
if (m_pArchive->GetCommitMode() == CZipArchive::cmOnChange)
result = m_pArchive->CommitChanges();
else
result = m_pArchive->CanModify();
if (result && m_pInfo->m_bFindFastEnabled)
{
InsertFindFastElement(pHeader, RemoveFindFastElement(pHeader, false));
}
return result;
}
bool CZipCentralDir::OnFileCentralChange()
{
if (!m_pArchive->CanModify(true))
{
return false;
}
RemoveFromDisk();
m_pArchive->Finalize(true);
return true;
}
void CZipCentralDir::CreateSharedData()
{
m_pInfo = new CInfo();
m_pInfo->Init();
m_pHeaders = new CZipArray<CZipFileHeader*>();
m_pFindArray = new CZipArray<CZipFindFast*>();
}
bool CZipCentralDir::IsAnyFileModified() const
{
ZIP_INDEX_TYPE uCount = (ZIP_INDEX_TYPE)m_pHeaders->GetSize();
for (ZIP_INDEX_TYPE i = 0; i < uCount; i++)
if ((*m_pHeaders)[(ZIP_ARRAY_SIZE_TYPE)i]->IsModified())
return true;
return false;
}
void CZipCentralDir::DestroySharedData()
{
if (!m_pInfo)
return;
#ifdef _ZIP_USE_LOCKING
LockAccess();
try
{
#endif
m_pInfo->m_iReference--;
if (m_pInfo->m_iReference <= 0) // <= is just in case instead of ==
{
if (m_pHeaders != NULL)
{
RemoveHeaders();
delete m_pHeaders;
m_pHeaders = NULL;
}
if (m_pFindArray != NULL)
{
ClearFindFastArray();
delete m_pFindArray;
m_pFindArray = NULL;
}
#ifdef _ZIP_USE_LOCKING
UnlockAccess();
#endif
delete m_pInfo;
m_pInfo = NULL;
}
#ifdef _ZIP_USE_LOCKING
}
catch(...)
{
UnlockAccess();
throw;
}
UnlockAccess();
#endif
}
ZIP_FILE_USIZE CZipCentralDir::LocateSignature()
{
return m_pStorage->LocateSignature(m_gszSignature, 0xFFFF + CENTRAL_DIR_END_SIZE);
}
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