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1 // Archive/ZipIn.h
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2
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3 #ifndef __ZIP_IN_H
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4 #define __ZIP_IN_H
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5
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6 #include "../../../Common/MyCom.h"
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7 #include "../../IStream.h"
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8
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9 #include "ZipHeader.h"
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10 #include "ZipItemEx.h"
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11
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12 namespace NArchive {
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13 namespace NZip {
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14
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15 class CInArchiveException
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16 {
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17 public:
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18 enum ECauseType
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19 {
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20 kUnexpectedEndOfArchive = 0,
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21 kArchiceHeaderCRCError,
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22 kFileHeaderCRCError,
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23 kIncorrectArchive,
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24 kDataDescroptorsAreNotSupported,
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25 kMultiVolumeArchiveAreNotSupported,
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26 kReadStreamError,
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27 kSeekStreamError
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28 }
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29 Cause;
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30 CInArchiveException(ECauseType cause): Cause(cause) {}
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31 };
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32
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33 class CInArchiveInfo
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34 {
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35 public:
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36 UInt64 Base;
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37 UInt64 StartPosition;
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38 CByteBuffer Comment;
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39 CInArchiveInfo(): Base(0), StartPosition(0) {}
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40 void Clear()
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41 {
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42 Base = 0;
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43 StartPosition = 0;
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44 Comment.SetCapacity(0);
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45 }
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46 };
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47
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48 class CProgressVirt
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49 {
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50 public:
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51 STDMETHOD(SetTotal)(UInt64 numFiles) PURE;
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52 STDMETHOD(SetCompleted)(UInt64 numFiles) PURE;
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53 };
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54
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55 struct CCdInfo
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56 {
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57 // UInt64 NumEntries;
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58 UInt64 Size;
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59 UInt64 Offset;
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60 };
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61
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62 class CInArchive
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63 {
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64 CMyComPtr<IInStream> m_Stream;
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65 UInt32 m_Signature;
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66 UInt64 m_StreamStartPosition;
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67 UInt64 m_Position;
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68 AString m_NameBuffer;
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69
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70 HRESULT Seek(UInt64 offset);
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71
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72 HRESULT FindAndReadMarker(IInStream *stream, const UInt64 *searchHeaderSizeLimit);
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73 bool ReadUInt32(UInt32 &signature);
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74 AString ReadFileName(UInt32 nameSize);
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75
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76 HRESULT ReadBytes(void *data, UInt32 size, UInt32 *processedSize);
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77 bool ReadBytesAndTestSize(void *data, UInt32 size);
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78 void SafeReadBytes(void *data, UInt32 size);
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79 void ReadBuffer(CByteBuffer &buffer, UInt32 size);
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80 Byte ReadByte();
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81 UInt16 ReadUInt16();
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82 UInt32 ReadUInt32();
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83 UInt64 ReadUInt64();
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84
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85 void IncreaseRealPosition(UInt64 addValue);
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86
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87 void ReadExtra(UInt32 extraSize, CExtraBlock &extraBlock,
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88 UInt64 &unpackSize, UInt64 &packSize, UInt64 &localHeaderOffset, UInt32 &diskStartNumber);
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89 HRESULT ReadLocalItem(CItemEx &item);
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90 HRESULT ReadLocalItemDescriptor(CItemEx &item);
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91 HRESULT ReadCdItem(CItemEx &item);
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92 HRESULT TryEcd64(UInt64 offset, CCdInfo &cdInfo);
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93 HRESULT FindCd(CCdInfo &cdInfo);
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94 HRESULT TryReadCd(CObjectVector<CItemEx> &items, UInt64 cdOffset, UInt64 cdSize, CProgressVirt *progress);
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95 HRESULT ReadCd(CObjectVector<CItemEx> &items, UInt64 &cdOffset, UInt64 &cdSize, CProgressVirt *progress);
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96 HRESULT ReadLocalsAndCd(CObjectVector<CItemEx> &items, CProgressVirt *progress, UInt64 &cdOffset);
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97 public:
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98 CInArchiveInfo m_ArchiveInfo;
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99 bool IsZip64;
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100
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101 HRESULT ReadHeaders(CObjectVector<CItemEx> &items, CProgressVirt *progress);
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102 HRESULT ReadLocalItemAfterCdItem(CItemEx &item);
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103 HRESULT ReadLocalItemAfterCdItemFull(CItemEx &item);
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104 HRESULT Open(IInStream *stream, const UInt64 *searchHeaderSizeLimit);
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105 void Close();
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106 void GetArchiveInfo(CInArchiveInfo &archiveInfo) const;
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107 bool SeekInArchive(UInt64 position);
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108 ISequentialInStream *CreateLimitedStream(UInt64 position, UInt64 size);
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109 IInStream* CreateStream();
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110
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111 bool IsOpen() const { return m_Stream != NULL; }
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112 };
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113
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114 }}
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115
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116 #endif
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