Zip Code Internals

Classes
class	CentralDir
class	EndOfCentralDir
class	Compressor
class	ExtraField
class	FileHeader
class	ZipStatFilter
	Helper class for tracking CRC and uncompressed size. More...
class	ZipTempStream

Macros
#define	ImplementCompressor(name, method)
#define	CompressorCreateReadStream(name)   Stream * Compressor##name::createReadStream(const CentralDir *cdir, Stream *zipStream)
#define	CompressorCreateWriteStream(name)   Stream * Compressor##name::createWriteStream(const CentralDir *cdir, Stream *zipStream)
#define	DeclareExtraField(name)   name(U16 id, ExtraFieldCreateFn fnCreate) : Parent(id, fnCreate) {}
#define	ImplementExtraField(name, id)   name gExtraField##name##instance(id, &createExtraField<name>);

Typedefs
typedef ExtraField *(*	ExtraFieldCreateFn )()

Enumerations
enum	CDIntFlags { CDFileDirty = BIT(0), CDFileAdded = BIT(1), CDFileDeleted = BIT(2), CDFileOpen = BIT(3) }
	Internal flags used by the zip code when writing zips. More...
enum	CompressionMethod {   Stored = 0, Shrunk = 1, ReducedL1 = 2, ReducedL2 = 3,   ReducedL3 = 4, ReducedL4 = 5, Imploded = 6, ReservedTokenized = 7,   Deflated = 8, EnhDefalted = 9, DateCompression = 10, ReservedPKWARE = 11,   BZip2 = 12, PPMd = 98, AESEncrypted = 99 }
enum	FileFlags {   Encrypted = BIT(0), Implode8KDictionary = BIT(1), Implode3ShannonFanoTrees = BIT(2), DeflateTypeMask = BIT(1) | BIT(2),   FileInfoInDirectory = BIT(3), ReservedEnhDeflate = BIT(4), PatchData = BIT(5), StrongEncryption = BIT(6),   UnusedReserved1 = BIT(7), UnusedReserved2 = BIT(8), UnusedReserved3 = BIT(9), UnusedReserved4 = BIT(10),   UnusedReserved5 = BIT(11), ReservedPKWARE1 = BIT(12), EncryptedDirectory = BIT(13), ReservedPKWARE2 = BIT(14),   ReservedPKWARE3 = BIT(15) }

Functions
template<class T >
ExtraField *	createExtraField ()

Detailed Description

The zip code internals are mostly undocumented, but should be fairly obvious to anyone who is familiar with the zip file format.

Macro Definition Documentation

#define CompressorCreateReadStream

(

name

)

Stream * Compressor##name::createReadStream(const CentralDir *cdir, Stream *zipStream)

#define CompressorCreateWriteStream

(

name

)

Stream * Compressor##name::createWriteStream(const CentralDir *cdir, Stream *zipStream)

#define DeclareExtraField

(

name

)

name(U16 id, ExtraFieldCreateFn fnCreate) : Parent(id, fnCreate) {}

#define ImplementCompressor	(		name,
			method
	)

Value:

class Compressor##name : public Compressor   \
   {                                            \
   public:                                      \
      Compressor##name(S32 m, const char *n) : Compressor(m, n) {} \
      virtual Stream *createReadStream(const CentralDir *cdir, Stream *zipStream); \
      virtual Stream *createWriteStream(const CentralDir *cdir, Stream *zipStream); \
   };                                           \
   Compressor##name gCompressor##name##instance(method, #name);

#define ImplementExtraField	(		name,
			id
	)		name gExtraField##name##instance(id, &createExtraField<name>);

Typedef Documentation

typedef ExtraField*(* ExtraFieldCreateFn)()

Enumeration Type Documentation

enum CDIntFlags

Internal flags used by the zip code when writing zips.

Enumerator
CDFileDirty
CDFileAdded
CDFileDeleted
CDFileOpen

enum CompressionMethod

Enumerator
Stored
Shrunk
ReducedL1
ReducedL2
ReducedL3
ReducedL4
Imploded
ReservedTokenized
Deflated
EnhDefalted
DateCompression
ReservedPKWARE
BZip2
PPMd
AESEncrypted

enum FileFlags

Enumerator
Encrypted
Implode8KDictionary
Implode3ShannonFanoTrees
DeflateTypeMask
FileInfoInDirectory
ReservedEnhDeflate
PatchData
StrongEncryption
UnusedReserved1
UnusedReserved2
UnusedReserved3
UnusedReserved4
UnusedReserved5
ReservedPKWARE1
EncryptedDirectory
ReservedPKWARE2
ReservedPKWARE3

Function Documentation

ExtraField* Zip::createExtraField

(

)