perl/p7zip-rar
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
7567d1288e
p7zip-rar/CPP/7zip/Archive/FatHandler.cpp

1057 lines
26 KiB
C++
Raw Normal View History

Imported Upstream version 16.02
2017-10-11 12:40:22 +02:00
// FatHandler.cpp
#include "StdAfx.h"
// #include <stdio.h>
#include "../../../C/CpuArch.h"
#include "../../Common/ComTry.h"
#include "../../Common/IntToString.h"
#include "../../Common/MyBuffer.h"
#include "../../Common/MyCom.h"
#include "../../Common/StringConvert.h"
#include "../../Windows/PropVariant.h"
#include "../../Windows/TimeUtils.h"
#include "../Common/LimitedStreams.h"
#include "../Common/ProgressUtils.h"
#include "../Common/RegisterArc.h"
#include "../Common/StreamUtils.h"
#include "../Compress/CopyCoder.h"
#include "Common/DummyOutStream.h"
#define Get16(p) GetUi16(p)
#define Get32(p) GetUi32(p)
#define PRF(x) /* x */
namespace NArchive {
namespace NFat {
static const UInt32 kFatItemUsedByDirMask = (UInt32)1 << 31;
struct CHeader
{
UInt32 NumSectors;
UInt16 NumReservedSectors;
Byte NumFats;
UInt32 NumFatSectors;
UInt32 RootDirSector;
UInt32 NumRootDirSectors;
UInt32 DataSector;
UInt32 FatSize;
UInt32 BadCluster;
Byte NumFatBits;
Byte SectorSizeLog;
Byte SectorsPerClusterLog;
Byte ClusterSizeLog;
UInt16 SectorsPerTrack;
UInt16 NumHeads;
UInt32 NumHiddenSectors;
bool VolFieldsDefined;
UInt32 VolId;
// Byte VolName[11];
// Byte FileSys[8];
// Byte OemName[5];
Byte MediaType;
// 32-bit FAT
UInt16 Flags;
UInt16 FsInfoSector;
UInt32 RootCluster;
bool IsFat32() const { return NumFatBits == 32; }
UInt64 GetPhySize() const { return (UInt64)NumSectors << SectorSizeLog; }
UInt32 SectorSize() const { return (UInt32)1 << SectorSizeLog; }
UInt32 ClusterSize() const { return (UInt32)1 << ClusterSizeLog; }
UInt32 ClusterToSector(UInt32 c) const { return DataSector + ((c - 2) << SectorsPerClusterLog); }
UInt32 IsEoc(UInt32 c) const { return c > BadCluster; }
UInt32 IsEocAndUnused(UInt32 c) const { return c > BadCluster && (c & kFatItemUsedByDirMask) == 0; }
UInt32 IsValidCluster(UInt32 c) const { return c >= 2 && c < FatSize; }
UInt32 SizeToSectors(UInt32 size) const { return (size + SectorSize() - 1) >> SectorSizeLog; }
UInt32 CalcFatSizeInSectors() const { return SizeToSectors((FatSize * (NumFatBits / 4) + 1) / 2); }
UInt32 GetFatSector() const
{
UInt32 index = (IsFat32() && (Flags & 0x80) != 0) ? (Flags & 0xF) : 0;
if (index > NumFats)
index = 0;
return NumReservedSectors + index * NumFatSectors;
}
UInt64 GetFilePackSize(UInt32 unpackSize) const
{
UInt64 mask = ClusterSize() - 1;
return (unpackSize + mask) & ~mask;
}
UInt32 GetNumClusters(UInt32 size) const
{ return (UInt32)(((UInt64)size + ClusterSize() - 1) >> ClusterSizeLog); }
bool Parse(const Byte *p);
};
static int GetLog(UInt32 num)
{
for (int i = 0; i < 31; i++)
if (((UInt32)1 << i) == num)
return i;
return -1;
}
static const UInt32 kHeaderSize = 512;
API_FUNC_static_IsArc IsArc_Fat(const Byte *p, size_t size)
{
if (size < kHeaderSize)
return k_IsArc_Res_NEED_MORE;
CHeader h;
return h.Parse(p) ? k_IsArc_Res_YES : k_IsArc_Res_NO;
}
}
bool CHeader::Parse(const Byte *p)
{
if (p[0x1FE] != 0x55 || p[0x1FF] != 0xAA)
return false;
int codeOffset = 0;
switch (p[0])
{
case 0xE9: codeOffset = 3 + (Int16)Get16(p + 1); break;
case 0xEB: if (p[2] != 0x90) return false; codeOffset = 2 + (signed char)p[1]; break;
default: return false;
}
{
{
UInt32 val32 = Get16(p + 11);
int s = GetLog(val32);
if (s < 9 || s > 12)
return false;
SectorSizeLog = (Byte)s;
}
{
UInt32 val32 = p[13];
int s = GetLog(val32);
if (s < 0)
return false;
SectorsPerClusterLog = (Byte)s;
}
ClusterSizeLog = (Byte)(SectorSizeLog + SectorsPerClusterLog);
if (ClusterSizeLog > 24)
return false;
}
NumReservedSectors = Get16(p + 14);
if (NumReservedSectors == 0)
return false;
NumFats = p[16];
if (NumFats < 1 || NumFats > 4)
return false;
// we also support images that contain 0 in offset field.
bool isOkOffset = (codeOffset == 0 || (p[0] == 0xEB && p[1] == 0));
UInt16 numRootDirEntries = Get16(p + 17);
if (numRootDirEntries == 0)
{
if (codeOffset < 90 && !isOkOffset)
return false;
NumFatBits = 32;
NumRootDirSectors = 0;
}
else
{
// Some FAT12s don't contain VolFields
if (codeOffset < 62 - 24 && !isOkOffset)
return false;
NumFatBits = 0;
UInt32 mask = (1 << (SectorSizeLog - 5)) - 1;
if ((numRootDirEntries & mask) != 0)
return false;
NumRootDirSectors = (numRootDirEntries + mask) >> (SectorSizeLog - 5);
}
NumSectors = Get16(p + 19);
if (NumSectors == 0)
NumSectors = Get32(p + 32);
else if (IsFat32())
return false;
MediaType = p[21];
NumFatSectors = Get16(p + 22);
SectorsPerTrack = Get16(p + 24);
NumHeads = Get16(p + 26);
NumHiddenSectors = Get32(p + 28);
// memcpy(OemName, p + 3, 5);
int curOffset = 36;
p += 36;
if (IsFat32())
{
if (NumFatSectors != 0)
return false;
NumFatSectors = Get32(p);
if (NumFatSectors >= (1 << 24))
return false;
Flags = Get16(p + 4);
if (Get16(p + 6) != 0)
return false;
RootCluster = Get32(p + 8);
FsInfoSector = Get16(p + 12);
for (int i = 16; i < 28; i++)
if (p[i] != 0)
return false;
p += 28;
curOffset += 28;
}
// DriveNumber = p[0];
VolFieldsDefined = false;
if (codeOffset >= curOffset + 3)
{
VolFieldsDefined = (p[2] == 0x29); // ExtendedBootSig
if (VolFieldsDefined)
{
if (codeOffset < curOffset + 26)
return false;
VolId = Get32(p + 3);
// memcpy(VolName, p + 7, 11);
// memcpy(FileSys, p + 18, 8);
}
}
if (NumFatSectors == 0)
return false;
RootDirSector = NumReservedSectors + NumFatSectors * NumFats;
DataSector = RootDirSector + NumRootDirSectors;
if (NumSectors < DataSector)
return false;
UInt32 numDataSectors = NumSectors - DataSector;
UInt32 numClusters = numDataSectors >> SectorsPerClusterLog;
BadCluster = 0x0FFFFFF7;
if (numClusters < 0xFFF5)
{
if (NumFatBits == 32)
return false;
NumFatBits = (Byte)(numClusters < 0xFF5 ? 12 : 16);
BadCluster &= ((1 << NumFatBits) - 1);
}
else if (NumFatBits != 32)
return false;
FatSize = numClusters + 2;
if (FatSize > BadCluster || CalcFatSizeInSectors() > NumFatSectors)
return false;
return true;
}
struct CItem
{
UString UName;
char DosName[11];
Byte CTime2;
UInt32 CTime;
UInt32 MTime;
UInt16 ADate;
Byte Attrib;
Byte Flags;
UInt32 Size;
UInt32 Cluster;
Int32 Parent;
// NT uses Flags to store Low Case status
bool NameIsLow() const { return (Flags & 0x8) != 0; }
bool ExtIsLow() const { return (Flags & 0x10) != 0; }
bool IsDir() const { return (Attrib & 0x10) != 0; }
UString GetShortName() const;
UString GetName() const;
UString GetVolName() const;
};
static unsigned CopyAndTrim(char *dest, const char *src, unsigned size, bool toLower)
{
memcpy(dest, src, size);
if (toLower)
{
for (unsigned i = 0; i < size; i++)
{
char c = dest[i];
if (c >= 'A' && c <= 'Z')
dest[i] = (char)(c + 0x20);
}
}
for (unsigned i = size;;)
{
if (i == 0)
return 0;
if (dest[i - 1] != ' ')
return i;
i--;
}
}
static UString FatStringToUnicode(const char *s)
{
return MultiByteToUnicodeString(s, CP_OEMCP);
}
UString CItem::GetShortName() const
{
char s[16];
unsigned i = CopyAndTrim(s, DosName, 8, NameIsLow());
s[i++] = '.';
unsigned j = CopyAndTrim(s + i, DosName + 8, 3, ExtIsLow());
if (j == 0)
i--;
s[i + j] = 0;
return FatStringToUnicode(s);
}
UString CItem::GetName() const
{
if (!UName.IsEmpty())
return UName;
return GetShortName();
}
UString CItem::GetVolName() const
{
if (!UName.IsEmpty())
return UName;
char s[12];
unsigned i = CopyAndTrim(s, DosName, 11, false);
s[i] = 0;
return FatStringToUnicode(s);
}
struct CDatabase
{
CHeader Header;
CObjectVector<CItem> Items;
UInt32 *Fat;
CMyComPtr<IInStream> InStream;
IArchiveOpenCallback *OpenCallback;
UInt32 NumFreeClusters;
bool VolItemDefined;
CItem VolItem;
UInt32 NumDirClusters;
CByteBuffer ByteBuf;
UInt64 NumCurUsedBytes;
UInt64 PhySize;
CDatabase(): Fat(0) {}
~CDatabase() { ClearAndClose(); }
void Clear();
void ClearAndClose();
HRESULT OpenProgressFat(bool changeTotal = true);
HRESULT OpenProgress();
UString GetItemPath(Int32 index) const;
HRESULT Open();
HRESULT ReadDir(Int32 parent, UInt32 cluster, unsigned level);
UInt64 GetHeadersSize() const
{
return (UInt64)(Header.DataSector + (NumDirClusters << Header.SectorsPerClusterLog)) << Header.SectorSizeLog;
}
HRESULT SeekToSector(UInt32 sector);
HRESULT SeekToCluster(UInt32 cluster) { return SeekToSector(Header.ClusterToSector(cluster)); }
};
HRESULT CDatabase::SeekToSector(UInt32 sector)
{
return InStream->Seek((UInt64)sector << Header.SectorSizeLog, STREAM_SEEK_SET, NULL);
}
void CDatabase::Clear()
{
PhySize = 0;
VolItemDefined = false;
NumDirClusters = 0;
NumCurUsedBytes = 0;
Items.Clear();
delete []Fat;
Fat = 0;
}
void CDatabase::ClearAndClose()
{
Clear();
InStream.Release();
}
HRESULT CDatabase::OpenProgressFat(bool changeTotal)
{
if (!OpenCallback)
return S_OK;
if (changeTotal)
{
UInt64 numTotalBytes = (Header.CalcFatSizeInSectors() << Header.SectorSizeLog) +
((UInt64)(Header.FatSize - NumFreeClusters) << Header.ClusterSizeLog);
RINOK(OpenCallback->SetTotal(NULL, &numTotalBytes));
}
return OpenCallback->SetCompleted(NULL, &NumCurUsedBytes);
}
HRESULT CDatabase::OpenProgress()
{
if (!OpenCallback)
return S_OK;
UInt64 numItems = Items.Size();
return OpenCallback->SetCompleted(&numItems, &NumCurUsedBytes);
}
UString CDatabase::GetItemPath(Int32 index) const
{
const CItem *item = &Items[index];
UString name = item->GetName();
for (;;)
{
index = item->Parent;
if (index < 0)
return name;
item = &Items[index];
name.InsertAtFront(WCHAR_PATH_SEPARATOR);
if (item->UName.IsEmpty())
name.Insert(0, item->GetShortName());
else
name.Insert(0, item->UName);
}
}
static wchar_t *AddSubStringToName(wchar_t *dest, const Byte *p, unsigned numChars)
{
for (unsigned i = 0; i < numChars; i++)
{
wchar_t c = Get16(p + i * 2);
if (c != 0 && c != 0xFFFF)
*dest++ = c;
}
*dest = 0;
return dest;
}
HRESULT CDatabase::ReadDir(Int32 parent, UInt32 cluster, unsigned level)
{
unsigned startIndex = Items.Size();
if (startIndex >= (1 << 30) || level > 256)
return S_FALSE;
UInt32 sectorIndex = 0;
UInt32 blockSize = Header.ClusterSize();
bool clusterMode = (Header.IsFat32() || parent >= 0);
if (!clusterMode)
{
blockSize = Header.SectorSize();
RINOK(SeekToSector(Header.RootDirSector));
}
ByteBuf.Alloc(blockSize);
UString curName;
int checkSum = -1;
int numLongRecords = -1;
for (UInt32 pos = blockSize;; pos += 32)
{
if (pos == blockSize)
{
pos = 0;
if ((NumDirClusters & 0xFF) == 0)
{
RINOK(OpenProgress());
}
if (clusterMode)
{
if (Header.IsEoc(cluster))
break;
if (!Header.IsValidCluster(cluster))
return S_FALSE;
PRF(printf("\nCluster = %4X", cluster));
RINOK(SeekToCluster(cluster));
UInt32 newCluster = Fat[cluster];
if ((newCluster & kFatItemUsedByDirMask) != 0)
return S_FALSE;
Fat[cluster] |= kFatItemUsedByDirMask;
cluster = newCluster;
NumDirClusters++;
NumCurUsedBytes += Header.ClusterSize();
}
else if (sectorIndex++ >= Header.NumRootDirSectors)
break;
RINOK(ReadStream_FALSE(InStream, ByteBuf, blockSize));
}
const Byte *p = ByteBuf + pos;
if (p[0] == 0)
{
/*
// FreeDOS formats FAT partition with cluster chain longer than required.
if (clusterMode && !Header.IsEoc(cluster))
return S_FALSE;
*/
break;
}
if (p[0] == 0xE5)
{
if (numLongRecords > 0)
return S_FALSE;
continue;
}
Byte attrib = p[11];
if ((attrib & 0x3F) == 0xF)
{
if (p[0] > 0x7F || Get16(p + 26) != 0)
return S_FALSE;
int longIndex = p[0] & 0x3F;
if (longIndex == 0)
return S_FALSE;
bool isLast = (p[0] & 0x40) != 0;
if (numLongRecords < 0)
{
if (!isLast)
return S_FALSE;
numLongRecords = longIndex;
}
else if (isLast || numLongRecords != longIndex)
return S_FALSE;
numLongRecords--;
if (p[12] == 0)
{
wchar_t nameBuf[14];
wchar_t *dest;
dest = AddSubStringToName(nameBuf, p + 1, 5);
dest = AddSubStringToName(dest, p + 14, 6);
AddSubStringToName(dest, p + 28, 2);
curName = nameBuf + curName;
if (isLast)
checkSum = p[13];
if (checkSum != p[13])
return S_FALSE;
}
}
else
{
if (numLongRecords > 0)
return S_FALSE;
CItem item;
memcpy(item.DosName, p, 11);
if (checkSum >= 0)
{
Byte sum = 0;
for (unsigned i = 0; i < 11; i++)
sum = (Byte)(((sum & 1) ? 0x80 : 0) + (sum >> 1) + (Byte)item.DosName[i]);
if (sum == checkSum)
item.UName = curName;
}
if (item.DosName[0] == 5)
item.DosName[0] = (char)(Byte)0xE5;
item.Attrib = attrib;
item.Flags = p[12];
item.Size = Get32(p + 28);
item.Cluster = Get16(p + 26);
if (Header.NumFatBits > 16)
item.Cluster |= ((UInt32)Get16(p + 20) << 16);
else
{
// OS/2 and WinNT probably can store EA (extended atributes) in that field.
}
item.CTime = Get32(p + 14);
item.CTime2 = p[13];
item.ADate = Get16(p + 18);
item.MTime = Get32(p + 22);
item.Parent = parent;
if (attrib == 8)
{
VolItem = item;
VolItemDefined = true;
}
else
if (memcmp(item.DosName, ". ", 11) != 0 &&
memcmp(item.DosName, ".. ", 11) != 0)
{
if (!item.IsDir())
NumCurUsedBytes += Header.GetFilePackSize(item.Size);
Items.Add(item);
PRF(printf("\n%7d: %S", Items.Size(), GetItemPath(Items.Size() - 1)));
}
numLongRecords = -1;
curName.Empty();
checkSum = -1;
}
}
unsigned finishIndex = Items.Size();
for (unsigned i = startIndex; i < finishIndex; i++)
{
const CItem &item = Items[i];
if (item.IsDir())
{
PRF(printf("\n%S", GetItemPath(i)));
RINOK(CDatabase::ReadDir(i, item.Cluster, level + 1));
}
}
return S_OK;
}
HRESULT CDatabase::Open()
{
Clear();
bool numFreeClustersDefined = false;
{
Byte buf[kHeaderSize];
RINOK(ReadStream_FALSE(InStream, buf, kHeaderSize));
if (!Header.Parse(buf))
return S_FALSE;
UInt64 fileSize;
RINOK(InStream->Seek(0, STREAM_SEEK_END, &fileSize));
/* we comment that check to support truncated images */
/*
if (fileSize < Header.GetPhySize())
return S_FALSE;
*/
if (Header.IsFat32())
{
SeekToSector(Header.FsInfoSector);
RINOK(ReadStream_FALSE(InStream, buf, kHeaderSize));
if (buf[0x1FE] != 0x55 || buf[0x1FF] != 0xAA)
return S_FALSE;
if (Get32(buf) == 0x41615252 && Get32(buf + 484) == 0x61417272)
{
NumFreeClusters = Get32(buf + 488);
numFreeClustersDefined = (NumFreeClusters <= Header.FatSize);
}
}
}
// numFreeClustersDefined = false; // to recalculate NumFreeClusters
if (!numFreeClustersDefined)
NumFreeClusters = 0;
CByteBuffer byteBuf;
Fat = new UInt32[Header.FatSize];
RINOK(OpenProgressFat());
RINOK(SeekToSector(Header.GetFatSector()));
if (Header.NumFatBits == 32)
{
const UInt32 kBufSize = (1 << 15);
byteBuf.Alloc(kBufSize);
for (UInt32 i = 0; i < Header.FatSize;)
{
UInt32 size = Header.FatSize - i;
const UInt32 kBufSize32 = kBufSize / 4;
if (size > kBufSize32)
size = kBufSize32;
UInt32 readSize = Header.SizeToSectors(size * 4) << Header.SectorSizeLog;
RINOK(ReadStream_FALSE(InStream, byteBuf, readSize));
NumCurUsedBytes += readSize;
const UInt32 *src = (const UInt32 *)(const Byte *)byteBuf;
UInt32 *dest = Fat + i;
if (numFreeClustersDefined)
for (UInt32 j = 0; j < size; j++)
dest[j] = Get32(src + j) & 0x0FFFFFFF;
else
{
UInt32 numFreeClusters = 0;
for (UInt32 j = 0; j < size; j++)
{
UInt32 v = Get32(src + j) & 0x0FFFFFFF;
numFreeClusters += (UInt32)(v - 1) >> 31;
dest[j] = v;
}
NumFreeClusters += numFreeClusters;
}
i += size;
if ((i & 0xFFFFF) == 0)
{
RINOK(OpenProgressFat(!numFreeClustersDefined));
}
}
}
else
{
const UInt32 kBufSize = (UInt32)Header.CalcFatSizeInSectors() << Header.SectorSizeLog;
NumCurUsedBytes += kBufSize;
byteBuf.Alloc(kBufSize);
Byte *p = byteBuf;
RINOK(ReadStream_FALSE(InStream, p, kBufSize));
UInt32 fatSize = Header.FatSize;
UInt32 *fat = &Fat[0];
if (Header.NumFatBits == 16)
for (UInt32 j = 0; j < fatSize; j++)
fat[j] = Get16(p + j * 2);
else
for (UInt32 j = 0; j < fatSize; j++)
fat[j] = (Get16(p + j * 3 / 2) >> ((j & 1) << 2)) & 0xFFF;
if (!numFreeClustersDefined)
{
UInt32 numFreeClusters = 0;
for (UInt32 i = 0; i < fatSize; i++)
numFreeClusters += (UInt32)(fat[i] - 1) >> 31;
NumFreeClusters = numFreeClusters;
}
}
RINOK(OpenProgressFat());
if ((Fat[0] & 0xFF) != Header.MediaType)
return S_FALSE;
RINOK(ReadDir(-1, Header.RootCluster, 0));
PhySize = Header.GetPhySize();
return S_OK;
}
class CHandler:
public IInArchive,
public IInArchiveGetStream,
public CMyUnknownImp,
CDatabase
{
public:
MY_UNKNOWN_IMP2(IInArchive, IInArchiveGetStream)
INTERFACE_IInArchive(;)
STDMETHOD(GetStream)(UInt32 index, ISequentialInStream **stream);
};
STDMETHODIMP CHandler::GetStream(UInt32 index, ISequentialInStream **stream)
{
COM_TRY_BEGIN
*stream = 0;
const CItem &item = Items[index];
CClusterInStream *streamSpec = new CClusterInStream;
CMyComPtr<ISequentialInStream> streamTemp = streamSpec;
streamSpec->Stream = InStream;
streamSpec->StartOffset = Header.DataSector << Header.SectorSizeLog;
streamSpec->BlockSizeLog = Header.ClusterSizeLog;
streamSpec->Size = item.Size;
UInt32 numClusters = Header.GetNumClusters(item.Size);
streamSpec->Vector.ClearAndReserve(numClusters);
UInt32 cluster = item.Cluster;
UInt32 size = item.Size;
if (size == 0)
{
if (cluster != 0)
return S_FALSE;
}
else
{
UInt32 clusterSize = Header.ClusterSize();
for (;; size -= clusterSize)
{
if (!Header.IsValidCluster(cluster))
return S_FALSE;
streamSpec->Vector.AddInReserved(cluster - 2);
cluster = Fat[cluster];
if (size <= clusterSize)
break;
}
if (!Header.IsEocAndUnused(cluster))
return S_FALSE;
}
RINOK(streamSpec->InitAndSeek());
*stream = streamTemp.Detach();
return S_OK;
COM_TRY_END
}
static const Byte kProps[] =
{
kpidPath,
kpidIsDir,
kpidSize,
kpidPackSize,
kpidMTime,
kpidCTime,
kpidATime,
kpidAttrib,
kpidShortName
};
enum
{
kpidNumFats = kpidUserDefined
// kpidOemName,
// kpidVolName,
// kpidFileSysType
};
static const CStatProp kArcProps[] =
{
{ NULL, kpidFileSystem, VT_BSTR},
{ NULL, kpidClusterSize, VT_UI4},
{ NULL, kpidFreeSpace, VT_UI8},
{ NULL, kpidHeadersSize, VT_UI8},
{ NULL, kpidMTime, VT_FILETIME},
{ NULL, kpidVolumeName, VT_BSTR},
{ "FATs", kpidNumFats, VT_UI4},
{ NULL, kpidSectorSize, VT_UI4},
{ NULL, kpidId, VT_UI4},
// { "OEM Name", kpidOemName, VT_BSTR},
// { "Volume Name", kpidVolName, VT_BSTR},
// { "File System Type", kpidFileSysType, VT_BSTR}
// { NULL, kpidSectorsPerTrack, VT_UI4},
// { NULL, kpidNumHeads, VT_UI4},
// { NULL, kpidHiddenSectors, VT_UI4}
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps_WITH_NAME
static void FatTimeToProp(UInt32 dosTime, UInt32 ms10, NWindows::NCOM::CPropVariant &prop)
{
FILETIME localFileTime, utc;
if (NWindows::NTime::DosTimeToFileTime(dosTime, localFileTime))
if (LocalFileTimeToFileTime(&localFileTime, &utc))
{
UInt64 t64 = (((UInt64)utc.dwHighDateTime) << 32) + utc.dwLowDateTime;
t64 += ms10 * 100000;
utc.dwLowDateTime = (DWORD)t64;
utc.dwHighDateTime = (DWORD)(t64 >> 32);
prop = utc;
}
}
/*
static void StringToProp(const Byte *src, unsigned size, NWindows::NCOM::CPropVariant &prop)
{
char dest[32];
memcpy(dest, src, size);
dest[size] = 0;
prop = FatStringToUnicode(dest);
}
#define STRING_TO_PROP(s, p) StringToProp(s, sizeof(s), prop)
*/
STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NWindows::NCOM::CPropVariant prop;
switch (propID)
{
case kpidFileSystem:
{
char s[16];
s[0] = 'F';
s[1] = 'A';
s[2] = 'T';
ConvertUInt32ToString(Header.NumFatBits, s + 3);
prop = s;
break;
}
case kpidClusterSize: prop = Header.ClusterSize(); break;
case kpidPhySize: prop = PhySize; break;
case kpidFreeSpace: prop = (UInt64)NumFreeClusters << Header.ClusterSizeLog; break;
case kpidHeadersSize: prop = GetHeadersSize(); break;
case kpidMTime: if (VolItemDefined) FatTimeToProp(VolItem.MTime, 0, prop); break;
case kpidShortComment:
case kpidVolumeName: if (VolItemDefined) prop = VolItem.GetVolName(); break;
case kpidNumFats: if (Header.NumFats != 2) prop = Header.NumFats; break;
case kpidSectorSize: prop = (UInt32)1 << Header.SectorSizeLog; break;
// case kpidSectorsPerTrack: prop = Header.SectorsPerTrack; break;
// case kpidNumHeads: prop = Header.NumHeads; break;
// case kpidOemName: STRING_TO_PROP(Header.OemName, prop); break;
case kpidId: if (Header.VolFieldsDefined) prop = Header.VolId; break;
// case kpidVolName: if (Header.VolFieldsDefined) STRING_TO_PROP(Header.VolName, prop); break;
// case kpidFileSysType: if (Header.VolFieldsDefined) STRING_TO_PROP(Header.FileSys, prop); break;
// case kpidHiddenSectors: prop = Header.NumHiddenSectors; break;
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NWindows::NCOM::CPropVariant prop;
const CItem &item = Items[index];
switch (propID)
{
case kpidPath: prop = GetItemPath(index); break;
case kpidShortName: prop = item.GetShortName(); break;
case kpidIsDir: prop = item.IsDir(); break;
case kpidMTime: FatTimeToProp(item.MTime, 0, prop); break;
case kpidCTime: FatTimeToProp(item.CTime, item.CTime2, prop); break;
case kpidATime: FatTimeToProp(((UInt32)item.ADate << 16), 0, prop); break;
case kpidAttrib: prop = (UInt32)item.Attrib; break;
case kpidSize: if (!item.IsDir()) prop = item.Size; break;
case kpidPackSize: if (!item.IsDir()) prop = Header.GetFilePackSize(item.Size); break;
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Open(IInStream *stream, const UInt64 *, IArchiveOpenCallback *callback)
{
COM_TRY_BEGIN
{
OpenCallback = callback;
InStream = stream;
HRESULT res;
try
{
res = CDatabase::Open();
if (res == S_OK)
return S_OK;
}
catch(...)
{
Close();
throw;
}
Close();
return res;
}
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
ClearAndClose();
return S_OK;
}
STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
Int32 testMode, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool allFilesMode = (numItems == (UInt32)(Int32)-1);
if (allFilesMode)
numItems = Items.Size();
if (numItems == 0)
return S_OK;
UInt32 i;
UInt64 totalSize = 0;
for (i = 0; i < numItems; i++)
{
const CItem &item = Items[allFilesMode ? i : indices[i]];
if (!item.IsDir())
totalSize += item.Size;
}
RINOK(extractCallback->SetTotal(totalSize));
UInt64 totalPackSize;
totalSize = totalPackSize = 0;
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
CLocalProgress *lps = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = lps;
lps->Init(extractCallback, false);
CDummyOutStream *outStreamSpec = new CDummyOutStream;
CMyComPtr<ISequentialOutStream> outStream(outStreamSpec);
for (i = 0; i < numItems; i++)
{
lps->InSize = totalPackSize;
lps->OutSize = totalSize;
RINOK(lps->SetCur());
CMyComPtr<ISequentialOutStream> realOutStream;
Int32 askMode = testMode ?
NExtract::NAskMode::kTest :
NExtract::NAskMode::kExtract;
Int32 index = allFilesMode ? i : indices[i];
const CItem &item = Items[index];
RINOK(extractCallback->GetStream(index, &realOutStream, askMode));
if (item.IsDir())
{
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK));
continue;
}
totalPackSize += Header.GetFilePackSize(item.Size);
totalSize += item.Size;
if (!testMode && !realOutStream)
continue;
RINOK(extractCallback->PrepareOperation(askMode));
outStreamSpec->SetStream(realOutStream);
realOutStream.Release();
outStreamSpec->Init();
int res = NExtract::NOperationResult::kDataError;
CMyComPtr<ISequentialInStream> inStream;
HRESULT hres = GetStream(index, &inStream);
if (hres != S_FALSE)
{
RINOK(hres);
if (inStream)
{
RINOK(copyCoder->Code(inStream, outStream, NULL, NULL, progress));
if (copyCoderSpec->TotalSize == item.Size)
res = NExtract::NOperationResult::kOK;
}
}
outStreamSpec->ReleaseStream();
RINOK(extractCallback->SetOperationResult(res));
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = Items.Size();
return S_OK;
}
static const Byte k_Signature[] = { 0x55, 0xAA };
REGISTER_ARC_I(
"FAT", "fat img", 0, 0xDA,
k_Signature,
0x1FE,
0,
IsArc_Fat)
}}
Reference in New Issue Copy Permalink