4.36 beta

7zip/Archive/Iso/IsoIn.h

@@ -0,0 +1,276 @@
+// Archive/IsoIn.h
+
+#ifndef __ARCHIVE_ISO_IN_H
+#define __ARCHIVE_ISO_IN_H
+
+#include "Common/MyCom.h"
+#include "Common/IntToString.h"
+
+#include "../../IStream.h"
+
+#include "IsoItem.h"
+#include "IsoHeader.h"
+
+namespace NArchive {
+namespace NIso {
+
+struct CDir: public CDirRecord
+{
+  CDir *Parent;
+  CObjectVector<CDir> _subItems;
+
+  void Clear()
+  {
+    Parent = 0;
+    _subItems.Clear();
+  }
+  
+  int GetLength() const
+  {
+    int len = FileId.GetCapacity();
+    if (Parent != 0)
+      if (Parent->Parent != 0)
+        len += 1 + Parent->GetLength();
+    return len;
+  }
+
+  int GetLengthU() const
+  {
+    int len = FileId.GetCapacity() / 2;
+    if (Parent != 0)
+      if (Parent->Parent != 0)
+        len += 1 + Parent->GetLengthU();
+    return len;
+  }
+  
+  AString GetPath() const
+  {
+    AString s;
+    int len = GetLength();
+    char *p = s.GetBuffer(len +  1);
+    p += len;
+    *p = 0;
+    const CDir *cur = this;
+    while(true)
+    {
+      int curLen = cur->FileId.GetCapacity();
+      p -= curLen;
+      memmove(p, (const char *)(const Byte *)cur->FileId, curLen);
+      cur = cur->Parent;
+      if (cur == 0)
+        break;
+      if (cur->Parent == 0)
+        break;
+      p--;
+      *p = '\\';
+    }
+    s.ReleaseBuffer();
+    return s;
+  }
+
+  UString GetPathU() const
+  {
+    UString s;
+    int len = GetLengthU();
+    wchar_t *p = s.GetBuffer(len +  1);
+    p += len;
+    *p = 0;
+    const CDir *cur = this;
+    while(true)
+    {
+      int curLen = cur->FileId.GetCapacity() / 2;
+      p -= curLen;
+      for (int i = 0; i < curLen; i++)
+      {
+        Byte b0 = ((const Byte *)cur->FileId)[i * 2];
+        Byte b1 = ((const Byte *)cur->FileId)[i * 2 + 1];
+        p[i] = ((wchar_t)b0 << 8) | (wchar_t)b1;
+      }
+      cur = cur->Parent;
+      if (cur == 0)
+        break;
+      if (cur->Parent == 0)
+        break;
+      p--;
+      *p = L'\\';
+    }
+    s.ReleaseBuffer();
+    return s;
+  }
+};
+
+struct CDateTime
+{
+  UInt16 Year;
+  Byte Month;
+  Byte Day;
+  Byte Hour;
+  Byte Minute;
+  Byte Second;
+  Byte Hundredths;
+  signed char GmtOffset; // min intervals from -48 (West) to +52 (East) recorded.
+  bool NotSpecified() const { return Year == 0 && Month == 0 && Day == 0 && 
+      Hour == 0 && Minute == 0 && Second == 0 && GmtOffset == 0; }
+};
+
+struct CBootRecordDescriptor
+{
+  Byte BootSystemId[32];  // a-characters
+  Byte BootId[32];        // a-characters
+  Byte BootSystemUse[1977];
+};
+
+struct CBootValidationEntry
+{
+  Byte PlatformId;
+  Byte Id[24]; // to identify the manufacturer/developer of the CD-ROM.
+};
+
+struct CBootInitialEntry
+{
+  bool Bootable;
+  Byte BootMediaType;
+  UInt16 LoadSegment;  
+  /* This is the load segment for the initial boot image. If this
+     value is 0 the system will use the traditional segment of 7C0. If this value
+     is non-zero the system will use the specified segment. This applies to x86
+     architectures only. For "flat" model architectures (such as Motorola) this
+     is the address divided by 10. */
+  Byte SystemType;    // This must be a copy of byte 5 (System Type) from the
+                      // Partition Table found in the boot image.
+  UInt16 SectorCount; // This is the number of virtual/emulated sectors the system
+                      // will store at Load Segment during the initial boot procedure.
+  UInt32 LoadRBA;     // This is the start address of the virtual disk. CD<43>s use
+                      // Relative/Logical block addressing.
+
+  UInt64 GetSize() const 
+  { 
+    // if (BootMediaType == NBootMediaType::k1d44Floppy) (1440 << 10);
+    return SectorCount * 512; 
+  }
+
+  UString GetName() const
+  {
+    UString s;
+    if (Bootable)
+      s += L"Bootable";
+    else
+      s += L"NotBootable";
+    s += L"_";
+    if (BootMediaType >= kNumBootMediaTypes)
+    {
+      wchar_t name[32];
+      ConvertUInt64ToString(BootMediaType, name);
+      s += name;
+    }
+    else
+      s += kMediaTypes[BootMediaType];
+    s += L".img";
+    return s;
+  }
+};
+
+struct CVolumeDescriptor
+{
+  Byte VolFlags;
+  Byte SystemId[32]; // a-characters. An identification of a system 
+                     // which can recognize and act upon the content of the Logical
+                     // Sectors with logical Sector Numbers 0 to 15 of the volume.
+  Byte VolumeId[32]; // d-characters. An identification of the volume.
+  UInt32 VolumeSpaceSize; // the number of Logical Blocks in which the Volume Space of the volume is recorded
+  Byte EscapeSequence[32];
+  UInt16 VolumeSetSize;
+  UInt16 VolumeSequenceNumber; // the ordinal number of the volume in the Volume Set of which the volume is a member.
+  UInt16 LogicalBlockSize;
+  UInt32 PathTableSize;
+  UInt32 LPathTableLocation;
+  UInt32 LOptionalPathTableLocation;
+  UInt32 MPathTableLocation;
+  UInt32 MOptionalPathTableLocation;
+  CDirRecord RootDirRecord;
+  Byte VolumeSetId[128];
+  Byte PublisherId[128];
+  Byte DataPreparerId[128];
+  Byte ApplicationId[128];
+  Byte CopyrightFileId[37];
+  Byte AbstractFileId[37];
+  Byte BibFileId[37];
+  CDateTime CreationTime;
+  CDateTime ModificationTime;
+  CDateTime ExpirationTime;
+  CDateTime EffectiveTime;
+  Byte FileStructureVersion; // = 1;
+  Byte ApplicationUse[512];
+
+  bool IsJoliet() const 
+  {
+    if ((VolFlags & 1) != 0)
+      return false;
+    Byte b = EscapeSequence[2];
+    return (EscapeSequence[0] == 0x25 && EscapeSequence[1] == 0x2F && 
+      (b == 0x40 || b == 0x43 || b == 0x45));
+  }
+};
+
+struct CRef
+{
+  CDir *Dir;
+  UInt32 Index;
+};
+
+const UInt32 kBlockSize = 1 << 11;
+
+class CInArchive
+{
+  CMyComPtr<IInStream> _stream;
+  UInt64 _position;
+
+  Byte m_Buffer[kBlockSize];
+  UInt32 m_BufferPos;
+  
+  CDir _rootDir;
+  bool _bootIsDefined;
+  CBootRecordDescriptor _bootDesc;
+
+  HRESULT ReadBytes(void *data, UInt32 size, UInt32 &processedSize);
+  void Skeep(size_t size);
+  void SkeepZeros(size_t size);
+  Byte ReadByte();
+  void ReadBytes(Byte *data, UInt32 size);
+  UInt16 ReadUInt16Spec();
+  UInt16 ReadUInt16();
+  UInt32 ReadUInt32Le();
+  UInt32 ReadUInt32Be();
+  UInt32 ReadUInt32();
+  UInt64 ReadUInt64();
+  UInt32 ReadDigits(int numDigits);
+  void ReadDateTime(CDateTime &d);
+  void ReadRecordingDateTime(CRecordingDateTime &t);
+  void ReadDirRecord2(CDirRecord &r, Byte len);
+  void ReadDirRecord(CDirRecord &r);
+
+  void ReadBootRecordDescriptor(CBootRecordDescriptor &d);
+  void ReadVolumeDescriptor(CVolumeDescriptor &d);
+
+  void SeekToBlock(UInt32 blockIndex);
+  void ReadDir(CDir &d, int level);
+  void CreateRefs(CDir &d);
+
+  void ReadBootInfo();
+  HRESULT Open2();
+public:
+  HRESULT Open(IInStream *inStream);
+  void Clear();
+
+  CObjectVector<CRef> Refs;
+  CObjectVector<CVolumeDescriptor> VolDescs;
+  int MainVolDescIndex;
+  UInt32 BlockSize;
+  CObjectVector<CBootInitialEntry> BootEntries;
+
+  bool IsJoliet() const { return VolDescs[MainVolDescIndex].IsJoliet(); }
+};
+  
+}}
+  
+#endif