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Initial creation
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Ladislav Zezula
255
src/SFileCreateArchive.cpp
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255
src/SFileCreateArchive.cpp
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/*****************************************************************************/
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/* SFileCreateArchive.cpp Copyright (c) Ladislav Zezula 2003 */
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/*---------------------------------------------------------------------------*/
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/* MPQ Editing functions */
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/*---------------------------------------------------------------------------*/
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/* Date Ver Who Comment */
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/* -------- ---- --- ------- */
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/* 24.03.03 1.00 Lad Splitted from SFileOpenArchive.cpp */
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/* 08.06.10 1.00 Lad Renamed to SFileCreateArchive.cpp */
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/*****************************************************************************/
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#define __STORMLIB_SELF__
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#include "StormLib.h"
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#include "StormCommon.h"
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//-----------------------------------------------------------------------------
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// Local variables
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static const DWORD MpqHeaderSizes[] =
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{
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MPQ_HEADER_SIZE_V1,
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MPQ_HEADER_SIZE_V2,
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MPQ_HEADER_SIZE_V3,
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MPQ_HEADER_SIZE_V4
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};
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//-----------------------------------------------------------------------------
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// Local functions
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static USHORT GetSectorSizeShift(DWORD dwSectorSize)
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{
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USHORT wSectorSizeShift = 0;
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while(dwSectorSize > 0x200)
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{
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dwSectorSize >>= 1;
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wSectorSizeShift++;
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}
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return wSectorSizeShift;
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}
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static int WriteNakedMPQHeader(TMPQArchive * ha)
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{
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TMPQHeader * pHeader = ha->pHeader;
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TMPQHeader Header;
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DWORD dwBytesToWrite = pHeader->dwHeaderSize;
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int nError = ERROR_SUCCESS;
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// Prepare the naked MPQ header
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memset(&Header, 0, sizeof(TMPQHeader));
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Header.dwID = pHeader->dwID;
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Header.dwHeaderSize = pHeader->dwHeaderSize;
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Header.dwArchiveSize = pHeader->dwHeaderSize;
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Header.wFormatVersion = pHeader->wFormatVersion;
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Header.wSectorSize = pHeader->wSectorSize;
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// Write it to the file
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BSWAP_TMPQHEADER(&Header);
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if(!FileStream_Write(ha->pStream, &ha->MpqPos, &Header, dwBytesToWrite))
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nError = GetLastError();
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return nError;
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}
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//-----------------------------------------------------------------------------
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// Creates a new MPQ archive.
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bool WINAPI SFileCreateArchive(const TCHAR * szMpqName, DWORD dwFlags, DWORD dwMaxFileCount, HANDLE * phMpq)
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{
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SFILE_CREATE_MPQ CreateInfo;
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// Fill the create structure
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memset(&CreateInfo, 0, sizeof(SFILE_CREATE_MPQ));
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CreateInfo.cbSize = sizeof(SFILE_CREATE_MPQ);
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CreateInfo.dwMpqVersion = (dwFlags & MPQ_CREATE_ARCHIVE_VMASK) >> FLAGS_TO_FORMAT_SHIFT;
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CreateInfo.dwStreamFlags = STREAM_PROVIDER_LINEAR | BASE_PROVIDER_FILE;
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CreateInfo.dwAttrFlags = (dwFlags & MPQ_CREATE_ATTRIBUTES) ? MPQ_ATTRIBUTE_ALL : 0;
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CreateInfo.dwSectorSize = (CreateInfo.dwMpqVersion >= MPQ_FORMAT_VERSION_3) ? 0x4000 : 0x1000;
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CreateInfo.dwRawChunkSize = (CreateInfo.dwMpqVersion >= MPQ_FORMAT_VERSION_4) ? 0x4000 : 0;
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CreateInfo.dwMaxFileCount = dwMaxFileCount;
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return SFileCreateArchive2(szMpqName, &CreateInfo, phMpq);
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}
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bool WINAPI SFileCreateArchive2(const TCHAR * szMpqName, PSFILE_CREATE_MPQ pCreateInfo, HANDLE * phMpq)
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{
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TFileStream * pStream = NULL; // File stream
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TMPQArchive * ha = NULL; // MPQ archive handle
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ULONGLONG MpqPos = 0; // Position of MPQ header in the file
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HANDLE hMpq = NULL;
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DWORD dwBlockTableSize = 0; // Initial block table size
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DWORD dwHashTableSize = 0;
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DWORD dwMaxFileCount;
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int nError = ERROR_SUCCESS;
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// Check the parameters, if they are valid
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if(szMpqName == NULL || *szMpqName == 0 || pCreateInfo == NULL || phMpq == NULL)
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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return false;
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}
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// Verify if all variables in SFILE_CREATE_MPQ are correct
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if((pCreateInfo->cbSize == 0 || pCreateInfo->cbSize > sizeof(SFILE_CREATE_MPQ)) ||
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(pCreateInfo->dwMpqVersion > MPQ_FORMAT_VERSION_4) ||
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(pCreateInfo->pvUserData != NULL || pCreateInfo->cbUserData != 0) ||
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(pCreateInfo->dwAttrFlags & ~MPQ_ATTRIBUTE_ALL) ||
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(pCreateInfo->dwSectorSize & (pCreateInfo->dwSectorSize - 1)) ||
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(pCreateInfo->dwRawChunkSize & (pCreateInfo->dwRawChunkSize - 1)) ||
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(pCreateInfo->dwMaxFileCount < 4))
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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return false;
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}
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// One time initialization of MPQ cryptography
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InitializeMpqCryptography();
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// We verify if the file already exists and if it's a MPQ archive.
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// If yes, we won't allow to overwrite it.
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if(SFileOpenArchive(szMpqName, 0, STREAM_PROVIDER_LINEAR | BASE_PROVIDER_FILE | MPQ_OPEN_NO_ATTRIBUTES | MPQ_OPEN_NO_LISTFILE, &hMpq))
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{
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SFileCloseArchive(hMpq);
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SetLastError(ERROR_ALREADY_EXISTS);
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return false;
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}
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//
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// At this point, we have to create the archive.
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// - If the file exists, convert it to MPQ archive.
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// - If the file doesn't exist, create new empty file
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//
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pStream = FileStream_OpenFile(szMpqName, pCreateInfo->dwStreamFlags);
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if(pStream == NULL)
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{
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pStream = FileStream_CreateFile(szMpqName, pCreateInfo->dwStreamFlags);
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if(pStream == NULL)
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return false;
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}
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// Increment the maximum amount of files to have space
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// for listfile and attributes file
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dwMaxFileCount = pCreateInfo->dwMaxFileCount;
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if(pCreateInfo->dwAttrFlags != 0)
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dwMaxFileCount++;
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dwMaxFileCount++;
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// If file count is not zero, initialize the hash table size
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dwHashTableSize = GetHashTableSizeForFileCount(dwMaxFileCount);
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// Retrieve the file size and round it up to 0x200 bytes
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FileStream_GetSize(pStream, &MpqPos);
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MpqPos = (MpqPos + 0x1FF) & (ULONGLONG)0xFFFFFFFFFFFFFE00ULL;
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if(!FileStream_SetSize(pStream, MpqPos))
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nError = GetLastError();
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#ifdef _DEBUG
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// Debug code, used for testing StormLib
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// dwBlockTableSize = dwHashTableSize * 2;
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#endif
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// Create the archive handle
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if(nError == ERROR_SUCCESS)
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{
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if((ha = STORM_ALLOC(TMPQArchive, 1)) == NULL)
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nError = ERROR_NOT_ENOUGH_MEMORY;
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}
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// Fill the MPQ archive handle structure
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if(nError == ERROR_SUCCESS)
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{
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memset(ha, 0, sizeof(TMPQArchive));
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ha->pStream = pStream;
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ha->dwSectorSize = pCreateInfo->dwSectorSize;
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ha->UserDataPos = MpqPos;
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ha->MpqPos = MpqPos;
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ha->pHeader = (TMPQHeader *)ha->HeaderData;
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ha->dwMaxFileCount = dwMaxFileCount;
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ha->dwFileTableSize = 0;
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ha->dwFileFlags1 = pCreateInfo->dwFileFlags1;
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ha->dwFileFlags2 = pCreateInfo->dwFileFlags2;
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ha->dwFlags = 0;
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// Setup the attributes
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ha->dwAttrFlags = pCreateInfo->dwAttrFlags;
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pStream = NULL;
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}
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// Fill the MPQ header
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if(nError == ERROR_SUCCESS)
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{
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TMPQHeader * pHeader = ha->pHeader;
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// Fill the MPQ header
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memset(pHeader, 0, sizeof(ha->HeaderData));
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pHeader->dwID = ID_MPQ;
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pHeader->dwHeaderSize = MpqHeaderSizes[pCreateInfo->dwMpqVersion];
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pHeader->dwArchiveSize = pHeader->dwHeaderSize + dwHashTableSize * sizeof(TMPQHash);
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pHeader->wFormatVersion = (USHORT)pCreateInfo->dwMpqVersion;
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pHeader->wSectorSize = GetSectorSizeShift(ha->dwSectorSize);
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pHeader->dwHashTablePos = pHeader->dwHeaderSize;
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pHeader->dwHashTableSize = dwHashTableSize;
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pHeader->dwBlockTablePos = pHeader->dwHashTablePos + dwHashTableSize * sizeof(TMPQHash);
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pHeader->dwBlockTableSize = dwBlockTableSize;
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// For MPQs version 4 and higher, we set the size of raw data block
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// for calculating MD5
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if(pCreateInfo->dwMpqVersion >= MPQ_FORMAT_VERSION_4)
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pHeader->dwRawChunkSize = pCreateInfo->dwRawChunkSize;
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// Write the naked MPQ header
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nError = WriteNakedMPQHeader(ha);
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// Remember that the (listfile) and (attributes) need to be saved
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ha->dwFlags |= MPQ_FLAG_CHANGED | MPQ_FLAG_INV_LISTFILE | MPQ_FLAG_INV_ATTRIBUTES;
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}
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// Create initial HET table, if the caller required an MPQ format 3.0 or newer
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if(nError == ERROR_SUCCESS && pCreateInfo->dwMpqVersion >= MPQ_FORMAT_VERSION_3)
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{
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ha->pHetTable = CreateHetTable(ha->dwMaxFileCount, 0x40, true);
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if(ha->pHetTable == NULL)
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nError = ERROR_NOT_ENOUGH_MEMORY;
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}
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// Create initial hash table
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if(nError == ERROR_SUCCESS)
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{
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nError = CreateHashTable(ha, dwHashTableSize);
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}
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// Create initial file table
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if(nError == ERROR_SUCCESS)
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{
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ha->pFileTable = STORM_ALLOC(TFileEntry, ha->dwMaxFileCount);
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if(ha->pFileTable != NULL)
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memset(ha->pFileTable, 0x00, sizeof(TFileEntry) * ha->dwMaxFileCount);
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else
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nError = ERROR_NOT_ENOUGH_MEMORY;
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}
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// Cleanup : If an error, delete all buffers and return
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if(nError != ERROR_SUCCESS)
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{
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FileStream_Close(pStream);
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FreeMPQArchive(ha);
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SetLastError(nError);
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ha = NULL;
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}
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// Return the values
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*phMpq = (HANDLE)ha;
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return (nError == ERROR_SUCCESS);
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}
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