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qzdoom-gpl/lzma/C/Archive/7z/7zIn.c

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- Added support for 7z archives. SVN r1545 (trunk)
2009-04-15 03:58:10 +00:00
/* 7zIn.c -- 7z Input functions
2008-12-31 : Igor Pavlov : Public domain */
#include "../../7zCrc.h"
#include "../../CpuArch.h"
#include "7zDecode.h"
#include "7zIn.h"
#define RINOM(x) { if ((x) == 0) return SZ_ERROR_MEM; }
#define NUM_FOLDER_CODERS_MAX 32
#define NUM_CODER_STREAMS_MAX 32
void SzArEx_Init(CSzArEx *p)
{
SzAr_Init(&p->db);
p->FolderStartPackStreamIndex = 0;
p->PackStreamStartPositions = 0;
p->FolderStartFileIndex = 0;
p->FileIndexToFolderIndexMap = 0;
}
void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc)
{
IAlloc_Free(alloc, p->FolderStartPackStreamIndex);
IAlloc_Free(alloc, p->PackStreamStartPositions);
IAlloc_Free(alloc, p->FolderStartFileIndex);
IAlloc_Free(alloc, p->FileIndexToFolderIndexMap);
SzAr_Free(&p->db, alloc);
SzArEx_Init(p);
}
/*
UInt64 GetFolderPackStreamSize(int folderIndex, int streamIndex) const
{
return PackSizes[FolderStartPackStreamIndex[folderIndex] + streamIndex];
}
UInt64 GetFilePackSize(int fileIndex) const
{
int folderIndex = FileIndexToFolderIndexMap[fileIndex];
if (folderIndex >= 0)
{
const CSzFolder &folderInfo = Folders[folderIndex];
if (FolderStartFileIndex[folderIndex] == fileIndex)
return GetFolderFullPackSize(folderIndex);
}
return 0;
}
*/
#define MY_ALLOC(T, p, size, alloc) { if ((size) == 0) p = 0; else \
if ((p = (T *)IAlloc_Alloc(alloc, (size) * sizeof(T))) == 0) return SZ_ERROR_MEM; }
static SRes SzArEx_Fill(CSzArEx *p, ISzAlloc *alloc)
{
UInt32 startPos = 0;
UInt64 startPosSize = 0;
UInt32 i;
UInt32 folderIndex = 0;
UInt32 indexInFolder = 0;
MY_ALLOC(UInt32, p->FolderStartPackStreamIndex, p->db.NumFolders, alloc);
for (i = 0; i < p->db.NumFolders; i++)
{
p->FolderStartPackStreamIndex[i] = startPos;
startPos += p->db.Folders[i].NumPackStreams;
}
MY_ALLOC(UInt64, p->PackStreamStartPositions, p->db.NumPackStreams, alloc);
for (i = 0; i < p->db.NumPackStreams; i++)
{
p->PackStreamStartPositions[i] = startPosSize;
startPosSize += p->db.PackSizes[i];
}
MY_ALLOC(UInt32, p->FolderStartFileIndex, p->db.NumFolders, alloc);
MY_ALLOC(UInt32, p->FileIndexToFolderIndexMap, p->db.NumFiles, alloc);
for (i = 0; i < p->db.NumFiles; i++)
{
CSzFileItem *file = p->db.Files + i;
int emptyStream = !file->HasStream;
if (emptyStream && indexInFolder == 0)
{
p->FileIndexToFolderIndexMap[i] = (UInt32)-1;
continue;
}
if (indexInFolder == 0)
{
/*
v3.13 incorrectly worked with empty folders
v4.07: Loop for skipping empty folders
*/
for (;;)
{
if (folderIndex >= p->db.NumFolders)
return SZ_ERROR_ARCHIVE;
p->FolderStartFileIndex[folderIndex] = i;
if (p->db.Folders[folderIndex].NumUnpackStreams != 0)
break;
folderIndex++;
}
}
p->FileIndexToFolderIndexMap[i] = folderIndex;
if (emptyStream)
continue;
indexInFolder++;
if (indexInFolder >= p->db.Folders[folderIndex].NumUnpackStreams)
{
folderIndex++;
indexInFolder = 0;
}
}
return SZ_OK;
}
UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder)
{
return p->dataPos +
p->PackStreamStartPositions[p->FolderStartPackStreamIndex[folderIndex] + indexInFolder];
}
int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize)
{
UInt32 packStreamIndex = p->FolderStartPackStreamIndex[folderIndex];
CSzFolder *folder = p->db.Folders + folderIndex;
UInt64 size = 0;
UInt32 i;
for (i = 0; i < folder->NumPackStreams; i++)
{
UInt64 t = size + p->db.PackSizes[packStreamIndex + i];
if (t < size) /* check it */
return SZ_ERROR_FAIL;
size = t;
}
*resSize = size;
return SZ_OK;
}
/*
SRes SzReadTime(const CObjectVector<CBuf> &dataVector,
CObjectVector<CSzFileItem> &files, UInt64 type)
{
CBoolVector boolVector;
RINOK(ReadBoolVector2(files.Size(), boolVector))
CStreamSwitch streamSwitch;
RINOK(streamSwitch.Set(this, &dataVector));
for (int i = 0; i < files.Size(); i++)
{
CSzFileItem &file = files[i];
CArchiveFileTime fileTime;
bool defined = boolVector[i];
if (defined)
{
UInt32 low, high;
RINOK(SzReadUInt32(low));
RINOK(SzReadUInt32(high));
fileTime.dwLowDateTime = low;
fileTime.dwHighDateTime = high;
}
switch(type)
{
case k7zIdCTime: file.IsCTimeDefined = defined; if (defined) file.CTime = fileTime; break;
case k7zIdATime: file.IsATimeDefined = defined; if (defined) file.ATime = fileTime; break;
case k7zIdMTime: file.IsMTimeDefined = defined; if (defined) file.MTime = fileTime; break;
}
}
return SZ_OK;
}
*/
static int TestSignatureCandidate(Byte *testBytes)
{
size_t i;
for (i = 0; i < k7zSignatureSize; i++)
if (testBytes[i] != k7zSignature[i])
return 0;
return 1;
}
typedef struct _CSzState
{
Byte *Data;
size_t Size;
}CSzData;
static SRes SzReadByte(CSzData *sd, Byte *b)
{
if (sd->Size == 0)
return SZ_ERROR_ARCHIVE;
sd->Size--;
*b = *sd->Data++;
return SZ_OK;
}
static SRes SzReadBytes(CSzData *sd, Byte *data, size_t size)
{
size_t i;
for (i = 0; i < size; i++)
{
RINOK(SzReadByte(sd, data + i));
}
return SZ_OK;
}
static SRes SzReadUInt32(CSzData *sd, UInt32 *value)
{
int i;
*value = 0;
for (i = 0; i < 4; i++)
{
Byte b;
RINOK(SzReadByte(sd, &b));
*value |= ((UInt32)(b) << (8 * i));
}
return SZ_OK;
}
static SRes SzReadNumber(CSzData *sd, UInt64 *value)
{
Byte firstByte;
Byte mask = 0x80;
int i;
RINOK(SzReadByte(sd, &firstByte));
*value = 0;
for (i = 0; i < 8; i++)
{
Byte b;
if ((firstByte & mask) == 0)
{
UInt64 highPart = firstByte & (mask - 1);
*value += (highPart << (8 * i));
return SZ_OK;
}
RINOK(SzReadByte(sd, &b));
*value |= ((UInt64)b << (8 * i));
mask >>= 1;
}
return SZ_OK;
}
static SRes SzReadNumber32(CSzData *sd, UInt32 *value)
{
UInt64 value64;
RINOK(SzReadNumber(sd, &value64));
if (value64 >= 0x80000000)
return SZ_ERROR_UNSUPPORTED;
if (value64 >= ((UInt64)(1) << ((sizeof(size_t) - 1) * 8 + 2)))
return SZ_ERROR_UNSUPPORTED;
*value = (UInt32)value64;
return SZ_OK;
}
static SRes SzReadID(CSzData *sd, UInt64 *value)
{
return SzReadNumber(sd, value);
}
static SRes SzSkeepDataSize(CSzData *sd, UInt64 size)
{
if (size > sd->Size)
return SZ_ERROR_ARCHIVE;
sd->Size -= (size_t)size;
sd->Data += (size_t)size;
return SZ_OK;
}
static SRes SzSkeepData(CSzData *sd)
{
UInt64 size;
RINOK(SzReadNumber(sd, &size));
return SzSkeepDataSize(sd, size);
}
static SRes SzReadArchiveProperties(CSzData *sd)
{
for (;;)
{
UInt64 type;
RINOK(SzReadID(sd, &type));
if (type == k7zIdEnd)
break;
SzSkeepData(sd);
}
return SZ_OK;
}
static SRes SzWaitAttribute(CSzData *sd, UInt64 attribute)
{
for (;;)
{
UInt64 type;
RINOK(SzReadID(sd, &type));
if (type == attribute)
return SZ_OK;
if (type == k7zIdEnd)
return SZ_ERROR_ARCHIVE;
RINOK(SzSkeepData(sd));
}
}
static SRes SzReadBoolVector(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
{
Byte b = 0;
Byte mask = 0;
size_t i;
MY_ALLOC(Byte, *v, numItems, alloc);
for (i = 0; i < numItems; i++)
{
if (mask == 0)
{
RINOK(SzReadByte(sd, &b));
mask = 0x80;
}
(*v)[i] = (Byte)(((b & mask) != 0) ? 1 : 0);
mask >>= 1;
}
return SZ_OK;
}
static SRes SzReadBoolVector2(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
{
Byte allAreDefined;
size_t i;
RINOK(SzReadByte(sd, &allAreDefined));
if (allAreDefined == 0)
return SzReadBoolVector(sd, numItems, v, alloc);
MY_ALLOC(Byte, *v, numItems, alloc);
for (i = 0; i < numItems; i++)
(*v)[i] = 1;
return SZ_OK;
}
static SRes SzReadHashDigests(
CSzData *sd,
size_t numItems,
Byte **digestsDefined,
UInt32 **digests,
ISzAlloc *alloc)
{
size_t i;
RINOK(SzReadBoolVector2(sd, numItems, digestsDefined, alloc));
MY_ALLOC(UInt32, *digests, numItems, alloc);
for (i = 0; i < numItems; i++)
if ((*digestsDefined)[i])
{
RINOK(SzReadUInt32(sd, (*digests) + i));
}
return SZ_OK;
}
static SRes SzReadPackInfo(
CSzData *sd,
UInt64 *dataOffset,
UInt32 *numPackStreams,
UInt64 **packSizes,
Byte **packCRCsDefined,
UInt32 **packCRCs,
ISzAlloc *alloc)
{
UInt32 i;
RINOK(SzReadNumber(sd, dataOffset));
RINOK(SzReadNumber32(sd, numPackStreams));
RINOK(SzWaitAttribute(sd, k7zIdSize));
MY_ALLOC(UInt64, *packSizes, (size_t)*numPackStreams, alloc);
for (i = 0; i < *numPackStreams; i++)
{
RINOK(SzReadNumber(sd, (*packSizes) + i));
}
for (;;)
{
UInt64 type;
RINOK(SzReadID(sd, &type));
if (type == k7zIdEnd)
break;
if (type == k7zIdCRC)
{
RINOK(SzReadHashDigests(sd, (size_t)*numPackStreams, packCRCsDefined, packCRCs, alloc));
continue;
}
RINOK(SzSkeepData(sd));
}
if (*packCRCsDefined == 0)
{
MY_ALLOC(Byte, *packCRCsDefined, (size_t)*numPackStreams, alloc);
MY_ALLOC(UInt32, *packCRCs, (size_t)*numPackStreams, alloc);
for (i = 0; i < *numPackStreams; i++)
{
(*packCRCsDefined)[i] = 0;
(*packCRCs)[i] = 0;
}
}
return SZ_OK;
}
static SRes SzReadSwitch(CSzData *sd)
{
Byte external;
RINOK(SzReadByte(sd, &external));
return (external == 0) ? SZ_OK: SZ_ERROR_UNSUPPORTED;
}
static SRes SzGetNextFolderItem(CSzData *sd, CSzFolder *folder, ISzAlloc *alloc)
{
UInt32 numCoders, numBindPairs, numPackStreams, i;
UInt32 numInStreams = 0, numOutStreams = 0;
RINOK(SzReadNumber32(sd, &numCoders));
if (numCoders > NUM_FOLDER_CODERS_MAX)
return SZ_ERROR_UNSUPPORTED;
folder->NumCoders = numCoders;
MY_ALLOC(CSzCoderInfo, folder->Coders, (size_t)numCoders, alloc);
for (i = 0; i < numCoders; i++)
SzCoderInfo_Init(folder->Coders + i);
for (i = 0; i < numCoders; i++)
{
Byte mainByte;
CSzCoderInfo *coder = folder->Coders + i;
{
unsigned idSize, j;
Byte longID[15];
RINOK(SzReadByte(sd, &mainByte));
idSize = (unsigned)(mainByte & 0xF);
RINOK(SzReadBytes(sd, longID, idSize));
if (idSize > sizeof(coder->MethodID))
return SZ_ERROR_UNSUPPORTED;
coder->MethodID = 0;
for (j = 0; j < idSize; j++)
coder->MethodID |= (UInt64)longID[idSize - 1 - j] << (8 * j);
if ((mainByte & 0x10) != 0)
{
RINOK(SzReadNumber32(sd, &coder->NumInStreams));
RINOK(SzReadNumber32(sd, &coder->NumOutStreams));
if (coder->NumInStreams > NUM_CODER_STREAMS_MAX ||
coder->NumOutStreams > NUM_CODER_STREAMS_MAX)
return SZ_ERROR_UNSUPPORTED;
}
else
{
coder->NumInStreams = 1;
coder->NumOutStreams = 1;
}
if ((mainByte & 0x20) != 0)
{
UInt64 propertiesSize = 0;
RINOK(SzReadNumber(sd, &propertiesSize));
if (!Buf_Create(&coder->Props, (size_t)propertiesSize, alloc))
return SZ_ERROR_MEM;
RINOK(SzReadBytes(sd, coder->Props.data, (size_t)propertiesSize));
}
}
while ((mainByte & 0x80) != 0)
{
RINOK(SzReadByte(sd, &mainByte));
RINOK(SzSkeepDataSize(sd, (mainByte & 0xF)));
if ((mainByte & 0x10) != 0)
{
UInt32 n;
RINOK(SzReadNumber32(sd, &n));
RINOK(SzReadNumber32(sd, &n));
}
if ((mainByte & 0x20) != 0)
{
UInt64 propertiesSize = 0;
RINOK(SzReadNumber(sd, &propertiesSize));
RINOK(SzSkeepDataSize(sd, propertiesSize));
}
}
numInStreams += coder->NumInStreams;
numOutStreams += coder->NumOutStreams;
}
if (numOutStreams == 0)
return SZ_ERROR_UNSUPPORTED;
folder->NumBindPairs = numBindPairs = numOutStreams - 1;
MY_ALLOC(CBindPair, folder->BindPairs, (size_t)numBindPairs, alloc);
for (i = 0; i < numBindPairs; i++)
{
CBindPair *bp = folder->BindPairs + i;
RINOK(SzReadNumber32(sd, &bp->InIndex));
RINOK(SzReadNumber32(sd, &bp->OutIndex));
}
if (numInStreams < numBindPairs)
return SZ_ERROR_UNSUPPORTED;
folder->NumPackStreams = numPackStreams = numInStreams - numBindPairs;
MY_ALLOC(UInt32, folder->PackStreams, (size_t)numPackStreams, alloc);
if (numPackStreams == 1)
{
for (i = 0; i < numInStreams ; i++)
if (SzFolder_FindBindPairForInStream(folder, i) < 0)
break;
if (i == numInStreams)
return SZ_ERROR_UNSUPPORTED;
folder->PackStreams[0] = i;
}
else
for (i = 0; i < numPackStreams; i++)
{
RINOK(SzReadNumber32(sd, folder->PackStreams + i));
}
return SZ_OK;
}
static SRes SzReadUnpackInfo(
CSzData *sd,
UInt32 *numFolders,
CSzFolder **folders, /* for alloc */
ISzAlloc *alloc,
ISzAlloc *allocTemp)
{
UInt32 i;
RINOK(SzWaitAttribute(sd, k7zIdFolder));
RINOK(SzReadNumber32(sd, numFolders));
{
RINOK(SzReadSwitch(sd));
MY_ALLOC(CSzFolder, *folders, (size_t)*numFolders, alloc);
for (i = 0; i < *numFolders; i++)
SzFolder_Init((*folders) + i);
for (i = 0; i < *numFolders; i++)
{
RINOK(SzGetNextFolderItem(sd, (*folders) + i, alloc));
}
}
RINOK(SzWaitAttribute(sd, k7zIdCodersUnpackSize));
for (i = 0; i < *numFolders; i++)
{
UInt32 j;
CSzFolder *folder = (*folders) + i;
UInt32 numOutStreams = SzFolder_GetNumOutStreams(folder);
MY_ALLOC(UInt64, folder->UnpackSizes, (size_t)numOutStreams, alloc);
for (j = 0; j < numOutStreams; j++)
{
RINOK(SzReadNumber(sd, folder->UnpackSizes + j));
}
}
for (;;)
{
UInt64 type;
RINOK(SzReadID(sd, &type));
if (type == k7zIdEnd)
return SZ_OK;
if (type == k7zIdCRC)
{
SRes res;
Byte *crcsDefined = 0;
UInt32 *crcs = 0;
res = SzReadHashDigests(sd, *numFolders, &crcsDefined, &crcs, allocTemp);
if (res == SZ_OK)
{
for (i = 0; i < *numFolders; i++)
{
CSzFolder *folder = (*folders) + i;
folder->UnpackCRCDefined = crcsDefined[i];
folder->UnpackCRC = crcs[i];
}
}
IAlloc_Free(allocTemp, crcs);
IAlloc_Free(allocTemp, crcsDefined);
RINOK(res);
continue;
}
RINOK(SzSkeepData(sd));
}
}
static SRes SzReadSubStreamsInfo(
CSzData *sd,
UInt32 numFolders,
CSzFolder *folders,
UInt32 *numUnpackStreams,
UInt64 **unpackSizes,
Byte **digestsDefined,
UInt32 **digests,
ISzAlloc *allocTemp)
{
UInt64 type = 0;
UInt32 i;
UInt32 si = 0;
UInt32 numDigests = 0;
for (i = 0; i < numFolders; i++)
folders[i].NumUnpackStreams = 1;
*numUnpackStreams = numFolders;
for (;;)
{
RINOK(SzReadID(sd, &type));
if (type == k7zIdNumUnpackStream)
{
*numUnpackStreams = 0;
for (i = 0; i < numFolders; i++)
{
UInt32 numStreams;
RINOK(SzReadNumber32(sd, &numStreams));
folders[i].NumUnpackStreams = numStreams;
*numUnpackStreams += numStreams;
}
continue;
}
if (type == k7zIdCRC || type == k7zIdSize)
break;
if (type == k7zIdEnd)
break;
RINOK(SzSkeepData(sd));
}
if (*numUnpackStreams == 0)
{
*unpackSizes = 0;
*digestsDefined = 0;
*digests = 0;
}
else
{
*unpackSizes = (UInt64 *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(UInt64));
RINOM(*unpackSizes);
*digestsDefined = (Byte *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(Byte));
RINOM(*digestsDefined);
*digests = (UInt32 *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(UInt32));
RINOM(*digests);
}
for (i = 0; i < numFolders; i++)
{
/*
v3.13 incorrectly worked with empty folders
v4.07: we check that folder is empty
*/
UInt64 sum = 0;
UInt32 j;
UInt32 numSubstreams = folders[i].NumUnpackStreams;
if (numSubstreams == 0)
continue;
if (type == k7zIdSize)
for (j = 1; j < numSubstreams; j++)
{
UInt64 size;
RINOK(SzReadNumber(sd, &size));
(*unpackSizes)[si++] = size;
sum += size;
}
(*unpackSizes)[si++] = SzFolder_GetUnpackSize(folders + i) - sum;
}
if (type == k7zIdSize)
{
RINOK(SzReadID(sd, &type));
}
for (i = 0; i < *numUnpackStreams; i++)
{
(*digestsDefined)[i] = 0;
(*digests)[i] = 0;
}
for (i = 0; i < numFolders; i++)
{
UInt32 numSubstreams = folders[i].NumUnpackStreams;
if (numSubstreams != 1 || !folders[i].UnpackCRCDefined)
numDigests += numSubstreams;
}
si = 0;
for (;;)
{
if (type == k7zIdCRC)
{
int digestIndex = 0;
Byte *digestsDefined2 = 0;
UInt32 *digests2 = 0;
SRes res = SzReadHashDigests(sd, numDigests, &digestsDefined2, &digests2, allocTemp);
if (res == SZ_OK)
{
for (i = 0; i < numFolders; i++)
{
CSzFolder *folder = folders + i;
UInt32 numSubstreams = folder->NumUnpackStreams;
if (numSubstreams == 1 && folder->UnpackCRCDefined)
{
(*digestsDefined)[si] = 1;
(*digests)[si] = folder->UnpackCRC;
si++;
}
else
{
UInt32 j;
for (j = 0; j < numSubstreams; j++, digestIndex++)
{
(*digestsDefined)[si] = digestsDefined2[digestIndex];
(*digests)[si] = digests2[digestIndex];
si++;
}
}
}
}
IAlloc_Free(allocTemp, digestsDefined2);
IAlloc_Free(allocTemp, digests2);
RINOK(res);
}
else if (type == k7zIdEnd)
return SZ_OK;
else
{
RINOK(SzSkeepData(sd));
}
RINOK(SzReadID(sd, &type));
}
}
static SRes SzReadStreamsInfo(
CSzData *sd,
UInt64 *dataOffset,
CSzAr *p,
UInt32 *numUnpackStreams,
UInt64 **unpackSizes, /* allocTemp */
Byte **digestsDefined, /* allocTemp */
UInt32 **digests, /* allocTemp */
ISzAlloc *alloc,
ISzAlloc *allocTemp)
{
for (;;)
{
UInt64 type;
RINOK(SzReadID(sd, &type));
if ((UInt64)(int)type != type)
return SZ_ERROR_UNSUPPORTED;
switch((int)type)
{
case k7zIdEnd:
return SZ_OK;
case k7zIdPackInfo:
{
RINOK(SzReadPackInfo(sd, dataOffset, &p->NumPackStreams,
&p->PackSizes, &p->PackCRCsDefined, &p->PackCRCs, alloc));
break;
}
case k7zIdUnpackInfo:
{
RINOK(SzReadUnpackInfo(sd, &p->NumFolders, &p->Folders, alloc, allocTemp));
break;
}
case k7zIdSubStreamsInfo:
{
RINOK(SzReadSubStreamsInfo(sd, p->NumFolders, p->Folders,
numUnpackStreams, unpackSizes, digestsDefined, digests, allocTemp));
break;
}
default:
return SZ_ERROR_UNSUPPORTED;
}
}
}
Byte kUtf8Limits[5] = { 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
static SRes SzReadFileNames(CSzData *sd, UInt32 numFiles, CSzFileItem *files, ISzAlloc *alloc)
{
UInt32 i;
for (i = 0; i < numFiles; i++)
{
UInt32 len = 0;
UInt32 pos = 0;
CSzFileItem *file = files + i;
while (pos + 2 <= sd->Size)
{
int numAdds;
UInt32 value = (UInt32)(sd->Data[pos] | (((UInt32)sd->Data[pos + 1]) << 8));
pos += 2;
len++;
if (value == 0)
break;
if (value < 0x80)
continue;
if (value >= 0xD800 && value < 0xE000)
{
UInt32 c2;
if (value >= 0xDC00)
return SZ_ERROR_ARCHIVE;
if (pos + 2 > sd->Size)
return SZ_ERROR_ARCHIVE;
c2 = (UInt32)(sd->Data[pos] | (((UInt32)sd->Data[pos + 1]) << 8));
pos += 2;
if (c2 < 0xDC00 || c2 >= 0xE000)
return SZ_ERROR_ARCHIVE;
value = ((value - 0xD800) << 10) | (c2 - 0xDC00);
}
for (numAdds = 1; numAdds < 5; numAdds++)
if (value < (((UInt32)1) << (numAdds * 5 + 6)))
break;
len += numAdds;
}
MY_ALLOC(char, file->Name, (size_t)len, alloc);
len = 0;
while (2 <= sd->Size)
{
int numAdds;
UInt32 value = (UInt32)(sd->Data[0] | (((UInt32)sd->Data[1]) << 8));
SzSkeepDataSize(sd, 2);
if (value < 0x80)
{
file->Name[len++] = (char)value;
if (value == 0)
break;
continue;
}
if (value >= 0xD800 && value < 0xE000)
{
UInt32 c2 = (UInt32)(sd->Data[0] | (((UInt32)sd->Data[1]) << 8));
SzSkeepDataSize(sd, 2);
value = ((value - 0xD800) << 10) | (c2 - 0xDC00);
}
for (numAdds = 1; numAdds < 5; numAdds++)
if (value < (((UInt32)1) << (numAdds * 5 + 6)))
break;
file->Name[len++] = (char)(kUtf8Limits[numAdds - 1] + (value >> (6 * numAdds)));
do
{
numAdds--;
file->Name[len++] = (char)(0x80 + ((value >> (6 * numAdds)) & 0x3F));
}
while (numAdds > 0);
len += numAdds;
}
}
return SZ_OK;
}
static SRes SzReadHeader2(
CSzArEx *p, /* allocMain */
CSzData *sd,
UInt64 **unpackSizes, /* allocTemp */
Byte **digestsDefined, /* allocTemp */
UInt32 **digests, /* allocTemp */
Byte **emptyStreamVector, /* allocTemp */
Byte **emptyFileVector, /* allocTemp */
Byte **lwtVector, /* allocTemp */
ISzAlloc *allocMain,
ISzAlloc *allocTemp)
{
UInt64 type;
UInt32 numUnpackStreams = 0;
UInt32 numFiles = 0;
CSzFileItem *files = 0;
UInt32 numEmptyStreams = 0;
UInt32 i;
RINOK(SzReadID(sd, &type));
if (type == k7zIdArchiveProperties)
{
RINOK(SzReadArchiveProperties(sd));
RINOK(SzReadID(sd, &type));
}
if (type == k7zIdMainStreamsInfo)
{
RINOK(SzReadStreamsInfo(sd,
&p->dataPos,
&p->db,
&numUnpackStreams,
unpackSizes,
digestsDefined,
digests, allocMain, allocTemp));
p->dataPos += p->startPosAfterHeader;
RINOK(SzReadID(sd, &type));
}
if (type == k7zIdEnd)
return SZ_OK;
if (type != k7zIdFilesInfo)
return SZ_ERROR_ARCHIVE;
RINOK(SzReadNumber32(sd, &numFiles));
p->db.NumFiles = numFiles;
MY_ALLOC(CSzFileItem, files, (size_t)numFiles, allocMain);
p->db.Files = files;
for (i = 0; i < numFiles; i++)
SzFile_Init(files + i);
for (;;)
{
UInt64 type;
UInt64 size;
RINOK(SzReadID(sd, &type));
if (type == k7zIdEnd)
break;
RINOK(SzReadNumber(sd, &size));
if ((UInt64)(int)type != type)
{
RINOK(SzSkeepDataSize(sd, size));
}
else
switch((int)type)
{
case k7zIdName:
{
RINOK(SzReadSwitch(sd));
RINOK(SzReadFileNames(sd, numFiles, files, allocMain))
break;
}
case k7zIdEmptyStream:
{
RINOK(SzReadBoolVector(sd, numFiles, emptyStreamVector, allocTemp));
numEmptyStreams = 0;
for (i = 0; i < numFiles; i++)
if ((*emptyStreamVector)[i])
numEmptyStreams++;
break;
}
case k7zIdEmptyFile:
{
RINOK(SzReadBoolVector(sd, numEmptyStreams, emptyFileVector, allocTemp));
break;
}
case k7zIdMTime:
{
RINOK(SzReadBoolVector2(sd, numFiles, lwtVector, allocTemp));
RINOK(SzReadSwitch(sd));
for (i = 0; i < numFiles; i++)
{
CSzFileItem *f = &files[i];
Byte defined = (*lwtVector)[i];
f->MTimeDefined = defined;
f->MTime.Low = f->MTime.High = 0;
if (defined)
{
RINOK(SzReadUInt32(sd, &f->MTime.Low));
RINOK(SzReadUInt32(sd, &f->MTime.High));
}
}
break;
}
default:
{
RINOK(SzSkeepDataSize(sd, size));
}
}
}
{
UInt32 emptyFileIndex = 0;
UInt32 sizeIndex = 0;
for (i = 0; i < numFiles; i++)
{
CSzFileItem *file = files + i;
file->IsAnti = 0;
if (*emptyStreamVector == 0)
file->HasStream = 1;
else
file->HasStream = (Byte)((*emptyStreamVector)[i] ? 0 : 1);
if (file->HasStream)
{
file->IsDir = 0;
file->Size = (*unpackSizes)[sizeIndex];
file->FileCRC = (*digests)[sizeIndex];
file->FileCRCDefined = (Byte)(*digestsDefined)[sizeIndex];
sizeIndex++;
}
else
{
if (*emptyFileVector == 0)
file->IsDir = 1;
else
file->IsDir = (Byte)((*emptyFileVector)[emptyFileIndex] ? 0 : 1);
emptyFileIndex++;
file->Size = 0;
file->FileCRCDefined = 0;
}
}
}
return SzArEx_Fill(p, allocMain);
}
static SRes SzReadHeader(
CSzArEx *p,
CSzData *sd,
ISzAlloc *allocMain,
ISzAlloc *allocTemp)
{
UInt64 *unpackSizes = 0;
Byte *digestsDefined = 0;
UInt32 *digests = 0;
Byte *emptyStreamVector = 0;
Byte *emptyFileVector = 0;
Byte *lwtVector = 0;
SRes res = SzReadHeader2(p, sd,
&unpackSizes, &digestsDefined, &digests,
&emptyStreamVector, &emptyFileVector, &lwtVector,
allocMain, allocTemp);
IAlloc_Free(allocTemp, unpackSizes);
IAlloc_Free(allocTemp, digestsDefined);
IAlloc_Free(allocTemp, digests);
IAlloc_Free(allocTemp, emptyStreamVector);
IAlloc_Free(allocTemp, emptyFileVector);
IAlloc_Free(allocTemp, lwtVector);
return res;
}
static SRes SzReadAndDecodePackedStreams2(
ILookInStream *inStream,
CSzData *sd,
CBuf *outBuffer,
UInt64 baseOffset,
CSzAr *p,
UInt64 **unpackSizes,
Byte **digestsDefined,
UInt32 **digests,
ISzAlloc *allocTemp)
{
UInt32 numUnpackStreams = 0;
UInt64 dataStartPos;
CSzFolder *folder;
UInt64 unpackSize;
SRes res;
RINOK(SzReadStreamsInfo(sd, &dataStartPos, p,
&numUnpackStreams, unpackSizes, digestsDefined, digests,
allocTemp, allocTemp));
dataStartPos += baseOffset;
if (p->NumFolders != 1)
return SZ_ERROR_ARCHIVE;
folder = p->Folders;
unpackSize = SzFolder_GetUnpackSize(folder);
RINOK(LookInStream_SeekTo(inStream, dataStartPos));
if (!Buf_Create(outBuffer, (size_t)unpackSize, allocTemp))
return SZ_ERROR_MEM;
res = SzDecode(p->PackSizes, folder,
inStream, dataStartPos,
outBuffer->data, (size_t)unpackSize, allocTemp);
RINOK(res);
if (folder->UnpackCRCDefined)
if (CrcCalc(outBuffer->data, (size_t)unpackSize) != folder->UnpackCRC)
return SZ_ERROR_CRC;
return SZ_OK;
}
static SRes SzReadAndDecodePackedStreams(
ILookInStream *inStream,
CSzData *sd,
CBuf *outBuffer,
UInt64 baseOffset,
ISzAlloc *allocTemp)
{
CSzAr p;
UInt64 *unpackSizes = 0;
Byte *digestsDefined = 0;
UInt32 *digests = 0;
SRes res;
SzAr_Init(&p);
res = SzReadAndDecodePackedStreams2(inStream, sd, outBuffer, baseOffset,
&p, &unpackSizes, &digestsDefined, &digests,
allocTemp);
SzAr_Free(&p, allocTemp);
IAlloc_Free(allocTemp, unpackSizes);
IAlloc_Free(allocTemp, digestsDefined);
IAlloc_Free(allocTemp, digests);
return res;
}
static SRes SzArEx_Open2(
CSzArEx *p,
ILookInStream *inStream,
ISzAlloc *allocMain,
ISzAlloc *allocTemp)
{
Byte header[k7zStartHeaderSize];
UInt64 nextHeaderOffset, nextHeaderSize;
size_t nextHeaderSizeT;
UInt32 nextHeaderCRC;
CBuf buffer;
SRes res;
RINOK(LookInStream_Read2(inStream, header, k7zStartHeaderSize, SZ_ERROR_NO_ARCHIVE));
if (!TestSignatureCandidate(header))
return SZ_ERROR_NO_ARCHIVE;
if (header[6] != k7zMajorVersion)
return SZ_ERROR_UNSUPPORTED;
nextHeaderOffset = GetUi64(header + 12);
nextHeaderSize = GetUi64(header + 20);
nextHeaderCRC = GetUi32(header + 28);
p->startPosAfterHeader = k7zStartHeaderSize;
if (CrcCalc(header + 12, 20) != GetUi32(header + 8))
return SZ_ERROR_CRC;
nextHeaderSizeT = (size_t)nextHeaderSize;
if (nextHeaderSizeT != nextHeaderSize)
return SZ_ERROR_MEM;
if (nextHeaderSizeT == 0)
return SZ_OK;
if (nextHeaderOffset > nextHeaderOffset + nextHeaderSize ||
nextHeaderOffset > nextHeaderOffset + nextHeaderSize + k7zStartHeaderSize)
return SZ_ERROR_NO_ARCHIVE;
{
Int64 pos = 0;
RINOK(inStream->Seek(inStream, &pos, SZ_SEEK_END));
if ((UInt64)pos < nextHeaderOffset ||
(UInt64)pos < k7zStartHeaderSize + nextHeaderOffset ||
(UInt64)pos < k7zStartHeaderSize + nextHeaderOffset + nextHeaderSize)
return SZ_ERROR_INPUT_EOF;
}
RINOK(LookInStream_SeekTo(inStream, k7zStartHeaderSize + nextHeaderOffset));
if (!Buf_Create(&buffer, nextHeaderSizeT, allocTemp))
return SZ_ERROR_MEM;
res = LookInStream_Read(inStream, buffer.data, nextHeaderSizeT);
if (res == SZ_OK)
{
res = SZ_ERROR_ARCHIVE;
if (CrcCalc(buffer.data, nextHeaderSizeT) == nextHeaderCRC)
{
CSzData sd;
UInt64 type;
sd.Data = buffer.data;
sd.Size = buffer.size;
res = SzReadID(&sd, &type);
if (res == SZ_OK)
{
if (type == k7zIdEncodedHeader)
{
CBuf outBuffer;
Buf_Init(&outBuffer);
res = SzReadAndDecodePackedStreams(inStream, &sd, &outBuffer, p->startPosAfterHeader, allocTemp);
if (res != SZ_OK)
Buf_Free(&outBuffer, allocTemp);
else
{
Buf_Free(&buffer, allocTemp);
buffer.data = outBuffer.data;
buffer.size = outBuffer.size;
sd.Data = buffer.data;
sd.Size = buffer.size;
res = SzReadID(&sd, &type);
}
}
}
if (res == SZ_OK)
{
if (type == k7zIdHeader)
res = SzReadHeader(p, &sd, allocMain, allocTemp);
else
res = SZ_ERROR_UNSUPPORTED;
}
}
}
Buf_Free(&buffer, allocTemp);
return res;
}
SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp)
{
SRes res = SzArEx_Open2(p, inStream, allocMain, allocTemp);
if (res != SZ_OK)
SzArEx_Free(p, allocMain);
return res;
}
Reference in a new issue Copy permalink