mirror of
https://github.com/Xevion/easy7zip.git
synced 2025-12-06 15:14:59 -06:00
390 lines
9.3 KiB
C++
Executable File
390 lines
9.3 KiB
C++
Executable File
// Archive/ComIn.cpp
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#include "StdAfx.h"
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#include "../../../../C/Alloc.h"
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#include "../../../../C/CpuArch.h"
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#include "Common/IntToString.h"
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#include "Common/MyCom.h"
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#include "../../Common/StreamUtils.h"
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#include "ComIn.h"
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#define Get16(p) GetUi16(p)
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#define Get32(p) GetUi32(p)
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namespace NArchive{
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namespace NCom{
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static const UInt32 kSignatureSize = 8;
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static const Byte kSignature[kSignatureSize] = { 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1 };
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void CUInt32Buf::Free()
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{
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MyFree(_buf);
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_buf = 0;
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}
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bool CUInt32Buf::Allocate(UInt32 numItems)
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{
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Free();
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if (numItems == 0)
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return true;
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size_t newSize = (size_t)numItems * sizeof(UInt32);
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if (newSize / sizeof(UInt32) != numItems)
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return false;
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_buf = (UInt32 *)MyAlloc(newSize);
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return (_buf != 0);
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}
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static HRESULT ReadSector(IInStream *inStream, Byte *buf, int sectorSizeBits, UInt32 sid)
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{
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RINOK(inStream->Seek((((UInt64)sid + 1) << sectorSizeBits), STREAM_SEEK_SET, NULL));
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return ReadStream_FALSE(inStream, buf, (UInt32)1 << sectorSizeBits);
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}
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static HRESULT ReadIDs(IInStream *inStream, Byte *buf, int sectorSizeBits, UInt32 sid, UInt32 *dest)
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{
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RINOK(ReadSector(inStream, buf, sectorSizeBits, sid));
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UInt32 sectorSize = (UInt32)1 << sectorSizeBits;
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for (UInt32 t = 0; t < sectorSize; t += 4)
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*dest++ = Get32(buf + t);
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return S_OK;
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}
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static void GetFileTimeFromMem(const Byte *p, FILETIME *ft)
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{
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ft->dwLowDateTime = Get32(p);
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ft->dwHighDateTime = Get32(p + 4);
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}
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void CItem::Parse(const Byte *p, bool mode64bit)
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{
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memcpy(Name, p, kNameSizeMax);
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// NameSize = Get16(p + 64);
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Type = p[66];
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LeftDid = Get32(p + 68);
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RightDid = Get32(p + 72);
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SonDid = Get32(p + 76);
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// Flags = Get32(p + 96);
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GetFileTimeFromMem(p + 100, &CTime);
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GetFileTimeFromMem(p + 108, &MTime);
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Sid = Get32(p + 116);
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Size = Get32(p + 120);
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if (mode64bit)
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Size |= ((UInt64)Get32(p + 124) << 32);
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}
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void CDatabase::Clear()
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{
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Fat.Free();
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MiniSids.Free();
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Mat.Free();
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Items.Clear();
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Refs.Clear();
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}
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static const UInt32 kNoDid = 0xFFFFFFFF;
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HRESULT CDatabase::AddNode(int parent, UInt32 did)
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{
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if (did == kNoDid)
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return S_OK;
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if (did >= (UInt32)Items.Size())
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return S_FALSE;
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const CItem &item = Items[did];
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if (item.IsEmpty())
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return S_FALSE;
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CRef ref;
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ref.Parent = parent;
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ref.Did = did;
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int index = Refs.Add(ref);
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if (Refs.Size() > Items.Size())
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return S_FALSE;
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RINOK(AddNode(parent, item.LeftDid));
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RINOK(AddNode(parent, item.RightDid));
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if (item.IsDir())
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{
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RINOK(AddNode(index, item.SonDid));
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}
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return S_OK;
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}
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static const char kCharOpenBracket = '[';
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static const char kCharCloseBracket = ']';
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static UString CompoundNameToFileName(const UString &s)
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{
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UString res;
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for (int i = 0; i < s.Length(); i++)
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{
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wchar_t c = s[i];
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if (c < 0x20)
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{
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res += kCharOpenBracket;
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wchar_t buf[32];
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ConvertUInt32ToString(c, buf);
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res += buf;
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res += kCharCloseBracket;
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}
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else
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res += c;
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}
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return res;
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}
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static char g_MsiChars[] =
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"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz._";
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static const wchar_t *kMsi_ID = L""; // L"{msi}";
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static const int kMsiNumBits = 6;
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static const UInt32 kMsiNumChars = 1 << kMsiNumBits;
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static const UInt32 kMsiCharMask = kMsiNumChars - 1;
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static const UInt32 kMsiStartUnicodeChar = 0x3800;
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static const UInt32 kMsiUnicodeRange = kMsiNumChars * (kMsiNumChars + 1);
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bool CompoundMsiNameToFileName(const UString &name, UString &resultName)
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{
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resultName.Empty();
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for (int i = 0; i < name.Length(); i++)
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{
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wchar_t c = name[i];
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if (c < kMsiStartUnicodeChar || c > kMsiStartUnicodeChar + kMsiUnicodeRange)
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return false;
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if (i == 0)
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resultName += kMsi_ID;
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c -= kMsiStartUnicodeChar;
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UInt32 c0 = c & kMsiCharMask;
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UInt32 c1 = c >> kMsiNumBits;
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if (c1 <= kMsiNumChars)
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{
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resultName += (wchar_t)g_MsiChars[c0];
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if (c1 == kMsiNumChars)
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break;
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resultName += (wchar_t)g_MsiChars[c1];
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}
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else
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resultName += L'!';
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}
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return true;
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}
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static UString ConvertName(const Byte *p, bool &isMsi)
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{
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isMsi = false;
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UString s;
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for (int i = 0; i < kNameSizeMax; i += 2)
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{
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wchar_t c = (p[i] | (wchar_t)p[i + 1] << 8);
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if (c == 0)
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break;
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s += c;
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}
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UString msiName;
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if (CompoundMsiNameToFileName(s, msiName))
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{
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isMsi = true;
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return msiName;
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}
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return CompoundNameToFileName(s);
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}
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static UString ConvertName(const Byte *p)
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{
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bool isMsi;
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return ConvertName(p, isMsi);
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}
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UString CDatabase::GetItemPath(UInt32 index) const
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{
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UString s;
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while (index != kNoDid)
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{
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const CRef &ref = Refs[index];
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const CItem &item = Items[ref.Did];
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if (!s.IsEmpty())
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s = (UString)WCHAR_PATH_SEPARATOR + s;
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s = ConvertName(item.Name) + s;
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index = ref.Parent;
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}
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return s;
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}
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HRESULT CDatabase::Open(IInStream *inStream)
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{
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MainSubfile = -1;
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static const UInt32 kHeaderSize = 512;
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Byte p[kHeaderSize];
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RINOK(ReadStream_FALSE(inStream, p, kHeaderSize));
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if (memcmp(p, kSignature, kSignatureSize) != 0)
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return S_FALSE;
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if (Get16(p + 0x1A) > 4) // majorVer
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return S_FALSE;
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if (Get16(p + 0x1C) != 0xFFFE)
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return S_FALSE;
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int sectorSizeBits = Get16(p + 0x1E);
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bool mode64bit = (sectorSizeBits >= 12);
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int miniSectorSizeBits = Get16(p + 0x20);
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SectorSizeBits = sectorSizeBits;
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MiniSectorSizeBits = miniSectorSizeBits;
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if (sectorSizeBits > 28 || miniSectorSizeBits > 28 ||
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sectorSizeBits < 7 || miniSectorSizeBits < 2 || miniSectorSizeBits > sectorSizeBits)
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return S_FALSE;
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UInt32 numSectorsForFAT = Get32(p + 0x2C);
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LongStreamMinSize = Get32(p + 0x38);
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UInt32 sectSize = (UInt32)1 << (int)sectorSizeBits;
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CByteBuffer sect;
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sect.SetCapacity(sectSize);
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int ssb2 = (int)(sectorSizeBits - 2);
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UInt32 numSidsInSec = (UInt32)1 << ssb2;
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UInt32 numFatItems = numSectorsForFAT << ssb2;
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if ((numFatItems >> ssb2) != numSectorsForFAT)
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return S_FALSE;
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FatSize = numFatItems;
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{
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CUInt32Buf bat;
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UInt32 numSectorsForBat = Get32(p + 0x48);
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const UInt32 kNumHeaderBatItems = 109;
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UInt32 numBatItems = kNumHeaderBatItems + (numSectorsForBat << ssb2);
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if (numBatItems < kNumHeaderBatItems || ((numBatItems - kNumHeaderBatItems) >> ssb2) != numSectorsForBat)
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return S_FALSE;
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if (!bat.Allocate(numBatItems))
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return S_FALSE;
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UInt32 i;
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for (i = 0; i < kNumHeaderBatItems; i++)
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bat[i] = Get32(p + 0x4c + i * 4);
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UInt32 sid = Get32(p + 0x44);
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for (UInt32 s = 0; s < numSectorsForBat; s++)
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{
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RINOK(ReadIDs(inStream, sect, sectorSizeBits, sid, bat + i));
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i += numSidsInSec - 1;
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sid = bat[i];
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}
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numBatItems = i;
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if (!Fat.Allocate(numFatItems))
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return S_FALSE;
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UInt32 j = 0;
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for (i = 0; i < numFatItems; j++, i += numSidsInSec)
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{
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if (j >= numBatItems)
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return S_FALSE;
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RINOK(ReadIDs(inStream, sect, sectorSizeBits, bat[j], Fat + i));
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}
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}
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UInt32 numMatItems;
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{
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UInt32 numSectorsForMat = Get32(p + 0x40);
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numMatItems = (UInt32)numSectorsForMat << ssb2;
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if ((numMatItems >> ssb2) != numSectorsForMat)
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return S_FALSE;
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if (!Mat.Allocate(numMatItems))
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return S_FALSE;
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UInt32 i;
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UInt32 sid = Get32(p + 0x3C);
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for (i = 0; i < numMatItems; i += numSidsInSec)
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{
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RINOK(ReadIDs(inStream, sect, sectorSizeBits, sid, Mat + i));
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if (sid >= numFatItems)
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return S_FALSE;
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sid = Fat[sid];
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}
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if (sid != NFatID::kEndOfChain)
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return S_FALSE;
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}
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{
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UInt32 sid = Get32(p + 0x30);
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for (;;)
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{
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if (sid >= numFatItems)
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return S_FALSE;
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RINOK(ReadSector(inStream, sect, sectorSizeBits, sid));
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for (UInt32 i = 0; i < sectSize; i += 128)
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{
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CItem item;
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item.Parse(sect + i, mode64bit);
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Items.Add(item);
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}
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sid = Fat[sid];
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if (sid == NFatID::kEndOfChain)
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break;
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}
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}
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CItem root = Items[0];
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{
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UInt32 numSectorsInMiniStream;
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{
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UInt64 numSatSects64 = (root.Size + sectSize - 1) >> sectorSizeBits;
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if (numSatSects64 > NFatID::kMaxValue)
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return S_FALSE;
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numSectorsInMiniStream = (UInt32)numSatSects64;
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}
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NumSectorsInMiniStream = numSectorsInMiniStream;
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if (!MiniSids.Allocate(numSectorsInMiniStream))
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return S_FALSE;
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{
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UInt64 matSize64 = (root.Size + ((UInt64)1 << miniSectorSizeBits) - 1) >> miniSectorSizeBits;
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if (matSize64 > NFatID::kMaxValue)
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return S_FALSE;
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MatSize = (UInt32)matSize64;
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if (numMatItems < MatSize)
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return S_FALSE;
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}
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UInt32 sid = root.Sid;
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for (UInt32 i = 0; ; i++)
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{
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if (sid == NFatID::kEndOfChain)
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{
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if (i != numSectorsInMiniStream)
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return S_FALSE;
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break;
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}
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if (i >= numSectorsInMiniStream)
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return S_FALSE;
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MiniSids[i] = sid;
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if (sid >= numFatItems)
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return S_FALSE;
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sid = Fat[sid];
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}
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}
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RINOK(AddNode(-1, root.SonDid));
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unsigned numCabs = 0;
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for (int i = 0; i < Refs.Size(); i++)
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{
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const CItem &item = Items[Refs[i].Did];
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if (item.IsDir() || numCabs > 1)
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continue;
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bool isMsiName;
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UString msiName = ConvertName(item.Name, isMsiName);
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if (isMsiName && msiName.Right(4).CompareNoCase(L".cab") == 0)
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{
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numCabs++;
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MainSubfile = i;
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}
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}
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if (numCabs > 1)
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MainSubfile = -1;
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return S_OK;
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}
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}}
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