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irrlicht/source/Irrlicht/CZipReader.cpp

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CZipReader.h"
#include "os.h"
// This method is used for error output from bzip2.
extern "C" void bz_internal_error(int errorCode)
{
irr::os::Printer::log("Error in bzip2 handling", irr::core::stringc(errorCode), irr::ELL_ERROR);
}
#ifdef __IRR_COMPILE_WITH_ZIP_ARCHIVE_LOADER_
#include "CFileList.h"
#include "CReadFile.h"
#include "coreutil.h"
#include "IrrCompileConfig.h"
#ifdef _IRR_COMPILE_WITH_ZLIB_
#include <zlib.h> // use system lib
#ifdef _IRR_COMPILE_WITH_ZIP_ENCRYPTION_
#include "aesGladman/fileenc.h"
#endif
#ifdef _IRR_COMPILE_WITH_BZIP2_
#include <bzlib.h>
#endif
#ifdef _IRR_COMPILE_WITH_LZMA_
#include "lzma/LzmaDec.h"
#endif
#endif
namespace irr
{
namespace io
{
// -----------------------------------------------------------------------------
// zip loader
// -----------------------------------------------------------------------------
//! Constructor
CArchiveLoaderZIP::CArchiveLoaderZIP(io::IFileSystem* fs)
: FileSystem(fs)
{
#ifdef _DEBUG
setDebugName("CArchiveLoaderZIP");
#endif
}
//! returns true if the file maybe is able to be loaded by this class
bool CArchiveLoaderZIP::isALoadableFileFormat(const io::path& filename) const
{
return core::hasFileExtension(filename, "zip", "pk3") ||
core::hasFileExtension(filename, "gz", "tgz");
}
//! Check to see if the loader can create archives of this type.
bool CArchiveLoaderZIP::isALoadableFileFormat(E_FILE_ARCHIVE_TYPE fileType) const
{
return (fileType == EFAT_ZIP || fileType == EFAT_GZIP);
}
//! Creates an archive from the filename
/** \param file File handle to check.
\return Pointer to newly created archive, or 0 upon error. */
IFileArchive* CArchiveLoaderZIP::createArchive(const io::path& filename, bool ignoreCase, bool ignorePaths) const
{
IFileArchive *archive = 0;
io::IReadFile* file = FileSystem->createAndOpenFile(filename);
if (file)
{
archive = createArchive(file, ignoreCase, ignorePaths);
file->drop();
}
return archive;
}
//! creates/loads an archive from the file.
//! \return Pointer to the created archive. Returns 0 if loading failed.
IFileArchive* CArchiveLoaderZIP::createArchive(io::IReadFile* file, bool ignoreCase, bool ignorePaths) const
{
IFileArchive *archive = 0;
if (file)
{
file->seek(0);
u16 sig;
file->read(&sig, 2);
#ifdef __BIG_ENDIAN__
sig = os::Byteswap::byteswap(sig);
#endif
file->seek(0);
bool isGZip = (sig == 0x8b1f);
archive = new CZipReader(FileSystem, file, ignoreCase, ignorePaths, isGZip);
}
return archive;
}
//! Check if the file might be loaded by this class
/** Check might look into the file.
\param file File handle to check.
\return True if file seems to be loadable. */
bool CArchiveLoaderZIP::isALoadableFileFormat(io::IReadFile* file) const
{
SZIPFileHeader header;
file->read( &header.Sig, 4 );
#ifdef __BIG_ENDIAN__
header.Sig = os::Byteswap::byteswap(header.Sig);
#endif
return header.Sig == 0x04034b50 || // ZIP
(header.Sig&0xffff) == 0x8b1f; // gzip
}
// -----------------------------------------------------------------------------
// zip archive
// -----------------------------------------------------------------------------
CZipReader::CZipReader(IFileSystem* fs, IReadFile* file, bool ignoreCase, bool ignorePaths, bool isGZip)
: CFileList((file ? file->getFileName() : io::path("")), ignoreCase, ignorePaths), FileSystem(fs), File(file), IsGZip(isGZip)
{
#ifdef _DEBUG
setDebugName("CZipReader");
#endif
if (File)
{
File->grab();
// load file entries
if (IsGZip)
while (scanGZipHeader()) { }
else
while (scanZipHeader()) { }
sort();
}
}
CZipReader::~CZipReader()
{
if (File)
File->drop();
}
//! get the archive type
E_FILE_ARCHIVE_TYPE CZipReader::getType() const
{
return IsGZip ? EFAT_GZIP : EFAT_ZIP;
}
const IFileList* CZipReader::getFileList() const
{
return this;
}
//! scans for a local header, returns false if there is no more local file header.
//! The gzip file format seems to think that there can be multiple files in a gzip file
//! but none
bool CZipReader::scanGZipHeader()
{
SZipFileEntry entry;
entry.Offset = 0;
memset(&entry.header, 0, sizeof(SZIPFileHeader));
// read header
SGZIPMemberHeader header;
if (File->read(&header, sizeof(SGZIPMemberHeader)) == sizeof(SGZIPMemberHeader))
{
#ifdef __BIG_ENDIAN__
header.sig = os::Byteswap::byteswap(header.sig);
header.time = os::Byteswap::byteswap(header.time);
#endif
// check header value
if (header.sig != 0x8b1f)
return false;
// now get the file info
if (header.flags & EGZF_EXTRA_FIELDS)
{
// read lenth of extra data
u16 dataLen;
File->read(&dataLen, 2);
#ifdef __BIG_ENDIAN__
dataLen = os::Byteswap::byteswap(dataLen);
#endif
// skip it
File->seek(dataLen, true);
}
io::path ZipFileName = "";
if (header.flags & EGZF_FILE_NAME)
{
c8 c;
File->read(&c, 1);
while (c)
{
ZipFileName.append(c);
File->read(&c, 1);
}
}
else
{
// no file name?
ZipFileName = Path;
core::deletePathFromFilename(ZipFileName);
// rename tgz to tar or remove gz extension
if (core::hasFileExtension(ZipFileName, "tgz"))
{
ZipFileName[ ZipFileName.size() - 2] = 'a';
ZipFileName[ ZipFileName.size() - 1] = 'r';
}
else if (core::hasFileExtension(ZipFileName, "gz"))
{
ZipFileName[ ZipFileName.size() - 3] = 0;
ZipFileName.validate();
}
}
if (header.flags & EGZF_COMMENT)
{
c8 c='a';
while (c)
File->read(&c, 1);
}
if (header.flags & EGZF_CRC16)
File->seek(2, true);
// we are now at the start of the data blocks
entry.Offset = File->getPos();
entry.header.FilenameLength = ZipFileName.size();
entry.header.CompressionMethod = header.compressionMethod;
entry.header.DataDescriptor.CompressedSize = (File->getSize() - 8) - File->getPos();
// seek to file end
File->seek(entry.header.DataDescriptor.CompressedSize, true);
// read CRC
File->read(&entry.header.DataDescriptor.CRC32, 4);
// read uncompressed size
File->read(&entry.header.DataDescriptor.UncompressedSize, 4);
#ifdef __BIG_ENDIAN__
entry.header.DataDescriptor.CRC32 = os::Byteswap::byteswap(entry.header.DataDescriptor.CRC32);
entry.header.DataDescriptor.UncompressedSize = os::Byteswap::byteswap(entry.header.DataDescriptor.UncompressedSize);
#endif
// now we've filled all the fields, this is just a standard deflate block
addItem(ZipFileName, entry.Offset, entry.header.DataDescriptor.UncompressedSize, false, 0);
FileInfo.push_back(entry);
}
// there's only one block of data in a gzip file
return false;
}
//! scans for a local header, returns false if there is no more local file header.
bool CZipReader::scanZipHeader(bool ignoreGPBits)
{
io::path ZipFileName = "";
SZipFileEntry entry;
entry.Offset = 0;
memset(&entry.header, 0, sizeof(SZIPFileHeader));
File->read(&entry.header, sizeof(SZIPFileHeader));
#ifdef __BIG_ENDIAN__
entry.header.Sig = os::Byteswap::byteswap(entry.header.Sig);
entry.header.VersionToExtract = os::Byteswap::byteswap(entry.header.VersionToExtract);
entry.header.GeneralBitFlag = os::Byteswap::byteswap(entry.header.GeneralBitFlag);
entry.header.CompressionMethod = os::Byteswap::byteswap(entry.header.CompressionMethod);
entry.header.LastModFileTime = os::Byteswap::byteswap(entry.header.LastModFileTime);
entry.header.LastModFileDate = os::Byteswap::byteswap(entry.header.LastModFileDate);
entry.header.DataDescriptor.CRC32 = os::Byteswap::byteswap(entry.header.DataDescriptor.CRC32);
entry.header.DataDescriptor.CompressedSize = os::Byteswap::byteswap(entry.header.DataDescriptor.CompressedSize);
entry.header.DataDescriptor.UncompressedSize = os::Byteswap::byteswap(entry.header.DataDescriptor.UncompressedSize);
entry.header.FilenameLength = os::Byteswap::byteswap(entry.header.FilenameLength);
entry.header.ExtraFieldLength = os::Byteswap::byteswap(entry.header.ExtraFieldLength);
#endif
if (entry.header.Sig != 0x04034b50)
return false; // local file headers end here.
// read filename
{
c8 *tmp = new c8 [ entry.header.FilenameLength + 2 ];
File->read(tmp, entry.header.FilenameLength);
tmp[entry.header.FilenameLength] = 0;
ZipFileName = tmp;
delete [] tmp;
}
#ifdef _IRR_COMPILE_WITH_ZIP_ENCRYPTION_
// AES encryption
if ((entry.header.GeneralBitFlag & ZIP_FILE_ENCRYPTED) && (entry.header.CompressionMethod == 99))
{
s16 restSize = entry.header.ExtraFieldLength;
SZipFileExtraHeader extraHeader;
while (restSize)
{
File->read(&extraHeader, sizeof(extraHeader));
#ifdef __BIG_ENDIAN__
extraHeader.ID = os::Byteswap::byteswap(extraHeader.ID);
extraHeader.Size = os::Byteswap::byteswap(extraHeader.Size);
#endif
restSize -= sizeof(extraHeader);
if (extraHeader.ID==(s16)0x9901)
{
SZipFileAESExtraData data;
File->read(&data, sizeof(data));
#ifdef __BIG_ENDIAN__
data.Version = os::Byteswap::byteswap(data.Version);
data.CompressionMode = os::Byteswap::byteswap(data.CompressionMode);
#endif
restSize -= sizeof(data);
if (data.Vendor[0]=='A' && data.Vendor[1]=='E')
{
// encode values into Sig
// AE-Version | Strength | ActualMode
entry.header.Sig =
((data.Version & 0xff) << 24) |
(data.EncryptionStrength << 16) |
(data.CompressionMode);
File->seek(restSize, true);
break;
}
}
}
}
// move forward length of extra field.
else
#endif
if (entry.header.ExtraFieldLength)
File->seek(entry.header.ExtraFieldLength, true);
// if bit 3 was set, use CentralDirectory for setup
if (!ignoreGPBits && entry.header.GeneralBitFlag & ZIP_INFO_IN_DATA_DESCRIPTOR)
{
SZIPFileCentralDirEnd dirEnd;
FileInfo.clear();
Files.clear();
// First place where the end record could be stored
File->seek(File->getSize()-22);
const char endID[] = {0x50, 0x4b, 0x05, 0x06, 0x0};
char tmp[5]={'\0'};
bool found=false;
// search for the end record ID
while (!found && File->getPos()>0)
{
int seek=8;
File->read(tmp, 4);
switch (tmp[0])
{
case 0x50:
if (!strcmp(endID, tmp))
{
seek=4;
found=true;
}
break;
case 0x4b:
seek=5;
break;
case 0x05:
seek=6;
break;
case 0x06:
seek=7;
break;
}
File->seek(-seek, true);
}
File->read(&dirEnd, sizeof(dirEnd));
#ifdef __BIG_ENDIAN__
dirEnd.NumberDisk = os::Byteswap::byteswap(dirEnd.NumberDisk);
dirEnd.NumberStart = os::Byteswap::byteswap(dirEnd.NumberStart);
dirEnd.TotalDisk = os::Byteswap::byteswap(dirEnd.TotalDisk);
dirEnd.TotalEntries = os::Byteswap::byteswap(dirEnd.TotalEntries);
dirEnd.Size = os::Byteswap::byteswap(dirEnd.Size);
dirEnd.Offset = os::Byteswap::byteswap(dirEnd.Offset);
dirEnd.CommentLength = os::Byteswap::byteswap(dirEnd.CommentLength);
#endif
FileInfo.reallocate(dirEnd.TotalEntries);
File->seek(dirEnd.Offset);
while (scanCentralDirectoryHeader()) { }
return false;
}
// store position in file
entry.Offset = File->getPos();
// move forward length of data
File->seek(entry.header.DataDescriptor.CompressedSize, true);
#ifdef _DEBUG
//os::Debuginfo::print("added file from archive", ZipFileName.c_str());
#endif
addItem(ZipFileName, entry.Offset, entry.header.DataDescriptor.UncompressedSize, ZipFileName.lastChar()=='/', FileInfo.size());
FileInfo.push_back(entry);
return true;
}
//! scans for a local header, returns false if there is no more local file header.
bool CZipReader::scanCentralDirectoryHeader()
{
io::path ZipFileName = "";
SZIPFileCentralDirFileHeader entry;
File->read(&entry, sizeof(SZIPFileCentralDirFileHeader));
#ifdef __BIG_ENDIAN__
entry.Sig = os::Byteswap::byteswap(entry.Sig);
entry.VersionMadeBy = os::Byteswap::byteswap(entry.VersionMadeBy);
entry.VersionToExtract = os::Byteswap::byteswap(entry.VersionToExtract);
entry.GeneralBitFlag = os::Byteswap::byteswap(entry.GeneralBitFlag);
entry.CompressionMethod = os::Byteswap::byteswap(entry.CompressionMethod);
entry.LastModFileTime = os::Byteswap::byteswap(entry.LastModFileTime);
entry.LastModFileDate = os::Byteswap::byteswap(entry.LastModFileDate);
entry.CRC32 = os::Byteswap::byteswap(entry.CRC32);
entry.CompressedSize = os::Byteswap::byteswap(entry.CompressedSize);
entry.UncompressedSize = os::Byteswap::byteswap(entry.UncompressedSize);
entry.FilenameLength = os::Byteswap::byteswap(entry.FilenameLength);
entry.ExtraFieldLength = os::Byteswap::byteswap(entry.ExtraFieldLength);
entry.FileCommentLength = os::Byteswap::byteswap(entry.FileCommentLength);
entry.DiskNumberStart = os::Byteswap::byteswap(entry.DiskNumberStart);
entry.InternalFileAttributes = os::Byteswap::byteswap(entry.InternalFileAttributes);
entry.ExternalFileAttributes = os::Byteswap::byteswap(entry.ExternalFileAttributes);
entry.RelativeOffsetOfLocalHeader = os::Byteswap::byteswap(entry.RelativeOffsetOfLocalHeader);
#endif
if (entry.Sig != 0x02014b50)
return false; // central dir headers end here.
const long pos = File->getPos();
File->seek(entry.RelativeOffsetOfLocalHeader);
scanZipHeader(true);
File->seek(pos+entry.FilenameLength+entry.ExtraFieldLength+entry.FileCommentLength);
FileInfo.getLast().header.DataDescriptor.CompressedSize=entry.CompressedSize;
FileInfo.getLast().header.DataDescriptor.UncompressedSize=entry.UncompressedSize;
FileInfo.getLast().header.DataDescriptor.CRC32=entry.CRC32;
Files.getLast().Size=entry.UncompressedSize;
return true;
}
//! opens a file by file name
IReadFile* CZipReader::createAndOpenFile(const io::path& filename)
{
s32 index = findFile(filename, false);
if (index != -1)
return createAndOpenFile(index);
return 0;
}
#ifdef _IRR_COMPILE_WITH_LZMA_
//! Used for LZMA decompression. The lib has no default memory management
namespace
{
void *SzAlloc(void *p, size_t size)
{
(void)p; // disable unused variable warnings
return malloc(size);
}
void SzFree(void *p, void *address)
{
(void)p; // disable unused variable warnings
free(address);
}
ISzAlloc lzmaAlloc = { SzAlloc, SzFree };
}
#endif
//! opens a file by index
IReadFile* CZipReader::createAndOpenFile(u32 index)
{
// Irrlicht supports 0, 8, 12, 14, 99
//0 - The file is stored (no compression)
//1 - The file is Shrunk
//2 - The file is Reduced with compression factor 1
//3 - The file is Reduced with compression factor 2
//4 - The file is Reduced with compression factor 3
//5 - The file is Reduced with compression factor 4
//6 - The file is Imploded
//7 - Reserved for Tokenizing compression algorithm
//8 - The file is Deflated
//9 - Reserved for enhanced Deflating
//10 - PKWARE Date Compression Library Imploding
//12 - bzip2 - Compression Method from libbz2, WinZip 10
//14 - LZMA - Compression Method, WinZip 12
//96 - Jpeg compression - Compression Method, WinZip 12
//97 - WavPack - Compression Method, WinZip 11
//98 - PPMd - Compression Method, WinZip 10
//99 - AES encryption, WinZip 9
const SZipFileEntry &e = FileInfo[Files[index].ID];
wchar_t buf[64];
s16 actualCompressionMethod=e.header.CompressionMethod;
IReadFile* decrypted=0;
u8* decryptedBuf=0;
u32 decryptedSize=e.header.DataDescriptor.CompressedSize;
#ifdef _IRR_COMPILE_WITH_ZIP_ENCRYPTION_
if ((e.header.GeneralBitFlag & ZIP_FILE_ENCRYPTED) && (e.header.CompressionMethod == 99))
{
os::Printer::log("Reading encrypted file.");
u8 salt[16]={0};
const u16 saltSize = (((e.header.Sig & 0x00ff0000) >>16)+1)*4;
File->seek(e.Offset);
File->read(salt, saltSize);
char pwVerification[2];
char pwVerificationFile[2];
File->read(pwVerification, 2);
fcrypt_ctx zctx; // the encryption context
int rc = fcrypt_init(
(e.header.Sig & 0x00ff0000) >>16,
(const unsigned char*)Password.c_str(), // the password
Password.size(), // number of bytes in password
salt, // the salt
(unsigned char*)pwVerificationFile, // on return contains password verifier
&zctx); // encryption context
if (strncmp(pwVerificationFile, pwVerification, 2))
{
os::Printer::log("Wrong password");
return 0;
}
decryptedSize= e.header.DataDescriptor.CompressedSize-saltSize-12;
decryptedBuf= new u8[decryptedSize];
u32 c = 0;
while ((c+32768)<=decryptedSize)
{
File->read(decryptedBuf+c, 32768);
fcrypt_decrypt(
decryptedBuf+c, // pointer to the data to decrypt
32768, // how many bytes to decrypt
&zctx); // decryption context
c+=32768;
}
File->read(decryptedBuf+c, decryptedSize-c);
fcrypt_decrypt(
decryptedBuf+c, // pointer to the data to decrypt
decryptedSize-c, // how many bytes to decrypt
&zctx); // decryption context
char fileMAC[10];
char resMAC[10];
rc = fcrypt_end(
(unsigned char*)resMAC, // on return contains the authentication code
&zctx); // encryption context
if (rc != 10)
{
os::Printer::log("Error on encryption closing");
delete [] decryptedBuf;
return 0;
}
File->read(fileMAC, 10);
if (strncmp(fileMAC, resMAC, 10))
{
os::Printer::log("Error on encryption check");
delete [] decryptedBuf;
return 0;
}
decrypted = FileSystem->createMemoryReadFile(decryptedBuf, decryptedSize, Files[index].FullName, true);
actualCompressionMethod = (e.header.Sig & 0xffff);
#if 0
if ((e.header.Sig & 0xff000000)==0x01000000)
{
}
else if ((e.header.Sig & 0xff000000)==0x02000000)
{
}
else
{
os::Printer::log("Unknown encryption method");
return 0;
}
#endif
}
#endif
switch(actualCompressionMethod)
{
case 0: // no compression
{
if (decrypted)
return decrypted;
else
return createLimitReadFile(Files[index].FullName, File, e.Offset, decryptedSize);
}
case 8:
{
#ifdef _IRR_COMPILE_WITH_ZLIB_
const u32 uncompressedSize = e.header.DataDescriptor.UncompressedSize;
c8* pBuf = new c8[ uncompressedSize ];
if (!pBuf)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
if (decrypted)
decrypted->drop();
return 0;
}
u8 *pcData = decryptedBuf;
if (!pcData)
{
pcData = new u8[decryptedSize];
if (!pcData)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
delete [] pBuf;
return 0;
}
//memset(pcData, 0, decryptedSize);
File->seek(e.Offset);
File->read(pcData, decryptedSize);
}
// Setup the inflate stream.
z_stream stream;
s32 err;
stream.next_in = (Bytef*)pcData;
stream.avail_in = (uInt)decryptedSize;
stream.next_out = (Bytef*)pBuf;
stream.avail_out = uncompressedSize;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
// Perform inflation. wbits < 0 indicates no zlib header inside the data.
err = inflateInit2(&stream, -MAX_WBITS);
if (err == Z_OK)
{
err = inflate(&stream, Z_FINISH);
inflateEnd(&stream);
if (err == Z_STREAM_END)
err = Z_OK;
err = Z_OK;
inflateEnd(&stream);
}
if (decrypted)
decrypted->drop();
else
delete[] pcData;
if (err != Z_OK)
{
swprintf_irr ( buf, 64, L"Error decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
delete [] pBuf;
return 0;
}
else
return FileSystem->createMemoryReadFile(pBuf, uncompressedSize, Files[index].FullName, true);
#else
return 0; // zlib not compiled, we cannot decompress the data.
#endif
}
case 12:
{
#ifdef _IRR_COMPILE_WITH_BZIP2_
const u32 uncompressedSize = e.header.DataDescriptor.UncompressedSize;
c8* pBuf = new c8[ uncompressedSize ];
if (!pBuf)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
if (decrypted)
decrypted->drop();
return 0;
}
u8 *pcData = decryptedBuf;
if (!pcData)
{
pcData = new u8[decryptedSize];
if (!pcData)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
delete [] pBuf;
return 0;
}
//memset(pcData, 0, decryptedSize);
File->seek(e.Offset);
File->read(pcData, decryptedSize);
}
bz_stream bz_ctx;
memset(&bz_ctx, 0, sizeof(bz_ctx));
/* use BZIP2's default memory allocation
bz_ctx->bzalloc = NULL;
bz_ctx->bzfree = NULL;
bz_ctx->opaque = NULL;
*/
int err = BZ2_bzDecompressInit(&bz_ctx, 0, 0); /* decompression */
if(err != BZ_OK)
{
os::Printer::log("bzip2 decompression failed. File cannot be read.", ELL_ERROR);
return 0;
}
bz_ctx.next_in = (char*)pcData;
bz_ctx.avail_in = decryptedSize;
/* pass all input to decompressor */
bz_ctx.next_out = pBuf;
bz_ctx.avail_out = uncompressedSize;
err = BZ2_bzDecompress(&bz_ctx);
err = BZ2_bzDecompressEnd(&bz_ctx);
if (decrypted)
decrypted->drop();
else
delete[] pcData;
if (err != BZ_OK)
{
swprintf_irr ( buf, 64, L"Error decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
delete [] pBuf;
return 0;
}
else
return FileSystem->createMemoryReadFile(pBuf, uncompressedSize, Files[index].FullName, true);
#else
os::Printer::log("bzip2 decompression not supported. File cannot be read.", ELL_ERROR);
return 0;
#endif
}
case 14:
{
#ifdef _IRR_COMPILE_WITH_LZMA_
u32 uncompressedSize = e.header.DataDescriptor.UncompressedSize;
c8* pBuf = new c8[ uncompressedSize ];
if (!pBuf)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
if (decrypted)
decrypted->drop();
return 0;
}
u8 *pcData = decryptedBuf;
if (!pcData)
{
pcData = new u8[decryptedSize];
if (!pcData)
{
swprintf_irr ( buf, 64, L"Not enough memory for decompressing %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
delete [] pBuf;
return 0;
}
//memset(pcData, 0, decryptedSize);
File->seek(e.Offset);
File->read(pcData, decryptedSize);
}
ELzmaStatus status;
SizeT tmpDstSize = uncompressedSize;
SizeT tmpSrcSize = decryptedSize;
unsigned int propSize = (pcData[3]<<8)+pcData[2];
int err = LzmaDecode((Byte*)pBuf, &tmpDstSize,
pcData+4+propSize, &tmpSrcSize,
pcData+4, propSize,
e.header.GeneralBitFlag&0x1?LZMA_FINISH_END:LZMA_FINISH_ANY, &status,
&lzmaAlloc);
uncompressedSize = tmpDstSize; // may be different to expected value
if (decrypted)
decrypted->drop();
else
delete[] pcData;
if (err != SZ_OK)
{
os::Printer::log( "Error decompressing", Files[index].FullName, ELL_ERROR);
delete [] pBuf;
return 0;
}
else
return FileSystem->createMemoryReadFile(pBuf, uncompressedSize, Files[index].FullName, true);
#else
os::Printer::log("lzma decompression not supported. File cannot be read.", ELL_ERROR);
return 0;
#endif
}
case 99:
// If we come here with an encrypted file, decryption support is missing
os::Printer::log("Decryption support not enabled. File cannot be read.", ELL_ERROR);
return 0;
default:
swprintf_irr ( buf, 64, L"file has unsupported compression method. %s", core::stringw(Files[index].FullName).c_str() );
os::Printer::log( buf, ELL_ERROR);
return 0;
};
}
} // end namespace io
} // end namespace irr
#endif // __IRR_COMPILE_WITH_ZIP_ARCHIVE_LOADER_
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