582 lines
17 KiB
C
582 lines
17 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: zipstrm.h
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// Purpose: interface of wxZipNotifier
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/// Compression Method, only 0 (store) and 8 (deflate) are supported here
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enum wxZipMethod
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{
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wxZIP_METHOD_STORE,
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wxZIP_METHOD_SHRINK,
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wxZIP_METHOD_REDUCE1,
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wxZIP_METHOD_REDUCE2,
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wxZIP_METHOD_REDUCE3,
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wxZIP_METHOD_REDUCE4,
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wxZIP_METHOD_IMPLODE,
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wxZIP_METHOD_TOKENIZE,
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wxZIP_METHOD_DEFLATE,
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wxZIP_METHOD_DEFLATE64,
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wxZIP_METHOD_BZIP2 = 12,
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wxZIP_METHOD_DEFAULT = 0xffff
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};
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/// Originating File-System.
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///
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/// These are Pkware's values. Note that Info-zip disagree on some of them,
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/// most notably NTFS.
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enum wxZipSystem
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{
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wxZIP_SYSTEM_MSDOS,
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wxZIP_SYSTEM_AMIGA,
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wxZIP_SYSTEM_OPENVMS,
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wxZIP_SYSTEM_UNIX,
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wxZIP_SYSTEM_VM_CMS,
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wxZIP_SYSTEM_ATARI_ST,
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wxZIP_SYSTEM_OS2_HPFS,
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wxZIP_SYSTEM_MACINTOSH,
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wxZIP_SYSTEM_Z_SYSTEM,
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wxZIP_SYSTEM_CPM,
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wxZIP_SYSTEM_WINDOWS_NTFS,
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wxZIP_SYSTEM_MVS,
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wxZIP_SYSTEM_VSE,
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wxZIP_SYSTEM_ACORN_RISC,
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wxZIP_SYSTEM_VFAT,
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wxZIP_SYSTEM_ALTERNATE_MVS,
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wxZIP_SYSTEM_BEOS,
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wxZIP_SYSTEM_TANDEM,
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wxZIP_SYSTEM_OS_400
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};
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/// Dos/Win file attributes
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enum wxZipAttributes
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{
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wxZIP_A_RDONLY = 0x01,
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wxZIP_A_HIDDEN = 0x02,
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wxZIP_A_SYSTEM = 0x04,
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wxZIP_A_SUBDIR = 0x10,
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wxZIP_A_ARCH = 0x20,
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wxZIP_A_MASK = 0x37
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};
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/// Values for the flags field in the zip headers
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enum wxZipFlags
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{
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wxZIP_ENCRYPTED = 0x0001,
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wxZIP_DEFLATE_NORMAL = 0x0000, // normal compression
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wxZIP_DEFLATE_EXTRA = 0x0002, // extra compression
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wxZIP_DEFLATE_FAST = 0x0004, // fast compression
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wxZIP_DEFLATE_SUPERFAST = 0x0006, // superfast compression
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wxZIP_DEFLATE_MASK = 0x0006,
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wxZIP_SUMS_FOLLOW = 0x0008, // crc and sizes come after the data
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wxZIP_ENHANCED = 0x0010,
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wxZIP_PATCH = 0x0020,
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wxZIP_STRONG_ENC = 0x0040,
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wxZIP_UNUSED = 0x0F80,
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wxZIP_RESERVED = 0xF000
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};
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/**
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@class wxZipNotifier
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If you need to know when a wxZipInputStream updates a wxZipEntry,
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you can create a notifier by deriving from this abstract base class,
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overriding wxZipNotifier::OnEntryUpdated().
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An instance of your notifier class can then be assigned to wxZipEntry
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objects, using wxZipEntry::SetNotifier().
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Setting a notifier is not usually necessary. It is used to handle
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certain cases when modifying an zip in a pipeline (i.e. between
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non-seekable streams).
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See @ref overview_archive_noseek.
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@library{wxbase}
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@category{archive,streams}
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@see @ref overview_archive_noseek, wxZipEntry, wxZipInputStream, wxZipOutputStream
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*/
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class wxZipNotifier
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{
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public:
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/**
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Override this to receive notifications when an wxZipEntry object changes.
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*/
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virtual void OnEntryUpdated(wxZipEntry& entry) = 0;
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};
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/**
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@class wxZipEntry
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Holds the meta-data for an entry in a zip.
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@section zipentry_avail Field availability
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When reading a zip from a stream that is seekable, wxZipEntry::GetNextEntry()
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returns a fully populated wxZipEntry object except for wxZipEntry::GetLocalExtra().
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wxZipEntry::GetLocalExtra() becomes available when the entry is opened, either by
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calling wxZipInputStream::OpenEntry() or by making an attempt to read the entry's data.
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For zips on non-seekable streams, the following fields are always available
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when wxZipEntry::GetNextEntry() returns:
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- wxZipEntry::GetDateTime
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- wxZipEntry::GetInternalFormat
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- wxZipEntry::GetInternalName
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- wxZipEntry::GetFlags
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- wxZipEntry::GetLocalExtra
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- wxZipEntry::GetMethod
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- wxZipEntry::GetName
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- wxZipEntry::GetOffset
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- wxZipEntry::IsDir
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The following fields are also usually available when GetNextEntry() returns,
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however, if the zip was also written to a non-seekable stream the zipper is
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permitted to store them after the entry's data. In that case they become
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available when the entry's data has been read to Eof(), or CloseEntry()
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has been called. (GetFlags() & wxZIP_SUMS_FOLLOW) != 0 indicates that
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one or more of these come after the data:
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- wxZipEntry::GetCompressedSize
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- wxZipEntry::GetCrc
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- wxZipEntry::GetSize
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The following are stored at the end of the zip, and become available when the
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end of the zip has been reached, i.e. after GetNextEntry() returns @NULL
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and Eof() is true:
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- wxZipEntry::GetComment
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- wxZipEntry::GetExternalAttributes
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- wxZipEntry::GetExtra
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- wxZipEntry::GetMode
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- wxZipEntry::GetSystemMadeBy
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- wxZipEntry::IsReadOnly
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- wxZipEntry::IsMadeByUnix
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- wxZipEntry::IsText
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@library{wxbase}
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@category{archive,streams}
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@see @ref overview_archive, wxZipInputStream, wxZipOutputStream, wxZipNotifier
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*/
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class wxZipEntry : public wxArchiveEntry
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{
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public:
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wxZipEntry(const wxString& name = wxEmptyString,
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const wxDateTime& dt = Now(),
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wxFileOffset size = wxInvalidOffset);
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/**
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Copy constructor.
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*/
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wxZipEntry(const wxZipEntry& entry);
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/**
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Make a copy of this entry.
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*/
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wxZipEntry* Clone() const;
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//@{
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/**
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Gets and sets the short comment for this entry.
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*/
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wxString GetComment() const;
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void SetComment(const wxString& comment);
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//@}
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//@{
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/**
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The low 8 bits are always the DOS/Windows file attributes for this entry.
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The values of these attributes are given in the enumeration ::wxZipAttributes.
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The remaining bits can store platform specific permission bits or
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attributes, and their meaning depends on the value of SetSystemMadeBy().
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If IsMadeByUnix() is @true then the high 16 bits are unix mode bits.
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The following other accessors access these bits:
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- IsReadOnly() / SetIsReadOnly()
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- IsDir() / SetIsDir()
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- GetMode() / SetMode()
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*/
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wxUint32 GetExternalAttributes() const;
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void SetExternalAttributes(wxUint32 attr);
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//@}
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//@{
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/**
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The extra field from the entry's central directory record.
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The extra field is used to store platform or application specific
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data. See Pkware's document 'appnote.txt' for information on its format.
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*/
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const char* GetExtra() const;
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size_t GetExtraLen() const;
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void SetExtra(const char* extra, size_t len);
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//@}
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//@{
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/**
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The extra field from the entry's local record.
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The extra field is used to store platform or application specific
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data. See Pkware's document 'appnote.txt' for information on its format.
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*/
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const char* GetLocalExtra() const;
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size_t GetLocalExtraLen() const;
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void SetLocalExtra(const char* extra, size_t len);
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//@}
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//@{
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/**
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The compression method.
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The enumeration ::wxZipMethod lists the possible values.
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The default constructor sets this to @c wxZIP_METHOD_DEFAULT,
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which allows wxZipOutputStream to choose the method when writing the entry.
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*/
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int GetMethod() const;
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void SetMethod(int method);
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//@}
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//@{
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/**
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If IsMadeByUnix() is true then returns the unix permission bits stored
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in GetExternalAttributes(). Otherwise synthesises them from the DOS attributes.
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*/
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int GetMode() const;
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/**
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Sets the DOS attributes in GetExternalAttributes() to be consistent with
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the @a mode given.
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If IsMadeByUnix() is @true then also stores @a mode in GetExternalAttributes().
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Note that the default constructor sets GetSystemMadeBy() to
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@c wxZIP_SYSTEM_MSDOS by default. So to be able to store unix
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permissions when creating zips, call SetSystemMadeBy(wxZIP_SYSTEM_UNIX).
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*/
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void SetMode(int mode);
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//@}
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//@{
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/**
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The originating file-system.
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The default constructor sets this to @c wxZIP_SYSTEM_MSDOS.
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Set it to @c wxZIP_SYSTEM_UNIX in order to be able to store unix
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permissions using SetMode().
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*/
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int GetSystemMadeBy() const;
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void SetSystemMadeBy(int system);
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//@}
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/**
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The compressed size of this entry in bytes.
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*/
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wxFileOffset GetCompressedSize() const;
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/**
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CRC32 for this entry's data.
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*/
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wxUint32 GetCrc() const;
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/**
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Returns a combination of the bits flags in the enumeration @c wxZipFlags.
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*/
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int GetFlags() const;
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//@{
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/**
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A static member that translates a filename into the internal format used
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within the archive. If the third parameter is provided, the bool pointed
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to is set to indicate whether the name looks like a directory name
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(i.e. has a trailing path separator).
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@see @ref overview_archive_byname
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*/
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wxString GetInternalName(const wxString& name,
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wxPathFormat format = wxPATH_NATIVE,
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bool* pIsDir = NULL);
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/**
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Returns the entry's filename in the internal format used within the archive.
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The name can include directory components, i.e. it can be a full path.
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The names of directory entries are returned without any trailing path separator.
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This gives a canonical name that can be used in comparisons.
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*/
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wxString GetInternalName() const;
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//@}
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/**
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Returns @true if GetSystemMadeBy() is a flavour of unix.
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*/
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bool IsMadeByUnix() const;
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//@{
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/**
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Indicates that this entry's data is text in an 8-bit encoding.
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*/
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bool IsText() const;
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void SetIsText(bool isText = true);
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//@}
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//@{
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/**
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Sets the notifier (see wxZipNotifier) for this entry.
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Whenever the wxZipInputStream updates this entry, it will then invoke
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the associated notifier's wxZipNotifier::OnEntryUpdated() method.
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Setting a notifier is not usually necessary. It is used to handle
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certain cases when modifying an zip in a pipeline (i.e. between
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non-seekable streams).
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@see @ref overview_archive_noseek, wxZipNotifier
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*/
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void SetNotifier(wxZipNotifier& notifier);
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void UnsetNotifier();
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//@}
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/**
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Assignment operator.
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*/
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wxZipEntry& operator=(const wxZipEntry& entry);
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};
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/**
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@class wxZipInputStream
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Input stream for reading zip files.
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wxZipInputStream::GetNextEntry() returns a wxZipEntry object containing the
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meta-data for the next entry in the zip (and gives away ownership).
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Reading from the wxZipInputStream then returns the entry's data.
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Eof() becomes @true after an attempt has been made to read past the end of
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the entry's data.
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When there are no more entries, GetNextEntry() returns @NULL and sets Eof().
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Note that in general zip entries are not seekable, and
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wxZipInputStream::SeekI() always returns ::wxInvalidOffset.
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@library{wxbase}
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@category{archive,streams}
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@see @ref overview_archive, wxZipEntry, wxZipOutputStream
|
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*/
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class wxZipInputStream : public wxArchiveInputStream
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{
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public:
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//@{
|
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/**
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Constructor. In a Unicode build the second parameter @a conv is used to
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translate the filename and comment fields into Unicode.
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It has no effect on the stream's data.
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If the parent stream is passed as a pointer then the new filter stream
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takes ownership of it. If it is passed by reference then it does not.
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*/
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wxZipInputStream(wxInputStream& stream,
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wxMBConv& conv = wxConvLocal);
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wxZipInputStream(wxInputStream* stream,
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wxMBConv& conv = wxConvLocal);
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//@}
|
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/**
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@deprecated
|
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Compatibility constructor (requires WXWIN_COMPATIBILITY_2_6).
|
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When this constructor is used, an emulation of seeking is
|
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switched on for compatibility with previous versions. Note however,
|
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that it is deprecated.
|
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*/
|
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wxZipInputStream(const wxString& archive,
|
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const wxString& file);
|
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/**
|
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Closes the current entry.
|
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On a non-seekable stream reads to the end of the current entry first.
|
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*/
|
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bool CloseEntry();
|
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|
||
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/**
|
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Returns the zip comment.
|
||
|
|
||
|
This is stored at the end of the zip, therefore when reading a zip
|
||
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from a non-seekable stream, it returns the empty string until the end
|
||
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of the zip has been reached, i.e. when GetNextEntry() returns @NULL.
|
||
|
*/
|
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wxString GetComment();
|
||
|
|
||
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/**
|
||
|
Closes the current entry if one is open, then reads the meta-data for
|
||
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the next entry and returns it in a wxZipEntry object, giving away ownership.
|
||
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The stream is then open and can be read.
|
||
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*/
|
||
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wxZipEntry* GetNextEntry();
|
||
|
|
||
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/**
|
||
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For a zip on a seekable stream returns the total number of entries in
|
||
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the zip. For zips on non-seekable streams returns the number of entries
|
||
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returned so far by GetNextEntry().
|
||
|
*/
|
||
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int GetTotalEntries();
|
||
|
|
||
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/**
|
||
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Closes the current entry if one is open, then opens the entry specified
|
||
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by the @a entry object.
|
||
|
|
||
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@a entry should be from the same zip file, and the zip should
|
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be on a seekable stream.
|
||
|
|
||
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@see overview_archive_byname
|
||
|
*/
|
||
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bool OpenEntry(wxZipEntry& entry);
|
||
|
};
|
||
|
|
||
|
|
||
|
|
||
|
/**
|
||
|
@class wxZipClassFactory
|
||
|
|
||
|
Class factory for the zip archive format.
|
||
|
See the base class for details.
|
||
|
|
||
|
@library{wxbase}
|
||
|
@category{archive,streams}
|
||
|
|
||
|
@see @ref overview_archive,
|
||
|
@ref overview_archive_generic,
|
||
|
wxZipEntry, wxZipInputStream, wxZipOutputStream
|
||
|
*/
|
||
|
class wxZipClassFactory : public wxArchiveClassFactory
|
||
|
{
|
||
|
public:
|
||
|
|
||
|
};
|
||
|
|
||
|
|
||
|
|
||
|
/**
|
||
|
@class wxZipOutputStream
|
||
|
|
||
|
Output stream for writing zip files.
|
||
|
|
||
|
wxZipOutputStream::PutNextEntry() is used to create a new entry in the
|
||
|
output zip, then the entry's data is written to the wxZipOutputStream.
|
||
|
Another call to wxZipOutputStream::PutNextEntry() closes the current
|
||
|
entry and begins the next.
|
||
|
|
||
|
@library{wxbase}
|
||
|
@category{archive,streams}
|
||
|
|
||
|
@see @ref overview_archive, wxZipEntry, wxZipInputStream
|
||
|
*/
|
||
|
class wxZipOutputStream : public wxArchiveOutputStream
|
||
|
{
|
||
|
public:
|
||
|
//@{
|
||
|
/**
|
||
|
Constructor.
|
||
|
|
||
|
@a level is the compression level to use.
|
||
|
It can be a value between 0 and 9 or -1 to use the default value
|
||
|
which currently is equivalent to 6.
|
||
|
|
||
|
If the parent stream is passed as a pointer then the new filter stream
|
||
|
takes ownership of it. If it is passed by reference then it does not.
|
||
|
In a Unicode build the third parameter @a conv is used to translate
|
||
|
the filename and comment fields to an 8-bit encoding.
|
||
|
It has no effect on the stream's data.
|
||
|
*/
|
||
|
wxZipOutputStream(wxOutputStream& stream, int level = -1,
|
||
|
wxMBConv& conv = wxConvLocal);
|
||
|
wxZipOutputStream(wxOutputStream* stream, int level = -1,
|
||
|
wxMBConv& conv = wxConvLocal);
|
||
|
//@}
|
||
|
|
||
|
/**
|
||
|
The destructor calls Close() to finish writing the zip if it has
|
||
|
not been called already.
|
||
|
*/
|
||
|
virtual ~wxZipOutputStream();
|
||
|
|
||
|
/**
|
||
|
Finishes writing the zip, returning @true if successful.
|
||
|
Called by the destructor if not called explicitly.
|
||
|
*/
|
||
|
bool Close();
|
||
|
|
||
|
/**
|
||
|
Close the current entry.
|
||
|
It is called implicitly whenever another new entry is created with CopyEntry()
|
||
|
or PutNextEntry(), or when the zip is closed.
|
||
|
*/
|
||
|
bool CloseEntry();
|
||
|
|
||
|
/**
|
||
|
Transfers the zip comment from the wxZipInputStream
|
||
|
to this output stream.
|
||
|
*/
|
||
|
bool CopyArchiveMetaData(wxZipInputStream& inputStream);
|
||
|
|
||
|
/**
|
||
|
Takes ownership of @a entry and uses it to create a new entry
|
||
|
in the zip. @a entry is then opened in @a inputStream and its contents
|
||
|
copied to this stream.
|
||
|
|
||
|
CopyEntry() is much more efficient than transferring the data using
|
||
|
Read() and Write() since it will copy them without decompressing and
|
||
|
recompressing them.
|
||
|
|
||
|
For zips on seekable streams, @a entry must be from the same zip file
|
||
|
as @a inputStream. For non-seekable streams, @a entry must also be the
|
||
|
last thing read from @a inputStream.
|
||
|
*/
|
||
|
bool CopyEntry(wxZipEntry* entry, wxZipInputStream& inputStream);
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
Set the compression level that will be used the next time an entry is
|
||
|
created.
|
||
|
|
||
|
It can be a value between 0 and 9 or -1 to use the default value
|
||
|
which currently is equivalent to 6.
|
||
|
*/
|
||
|
int GetLevel() const;
|
||
|
void SetLevel(int level);
|
||
|
//@}
|
||
|
|
||
|
/**
|
||
|
Create a new directory entry (see wxArchiveEntry::IsDir) with the given
|
||
|
name and timestamp.
|
||
|
|
||
|
PutNextEntry() can also be used to create directory entries, by supplying
|
||
|
a name with a trailing path separator.
|
||
|
*/
|
||
|
bool PutNextDirEntry(const wxString& name,
|
||
|
const wxDateTime& dt = wxDateTime::Now());
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
Takes ownership of @a entry and uses it to create a new entry in the zip.
|
||
|
*/
|
||
|
bool PutNextEntry(wxZipEntry* entry);
|
||
|
|
||
|
/**
|
||
|
Create a new entry with the given name, timestamp and size.
|
||
|
*/
|
||
|
bool PutNextEntry(const wxString& name,
|
||
|
const wxDateTime& dt = wxDateTime::Now(),
|
||
|
wxFileOffset size = wxInvalidOffset);
|
||
|
//@}
|
||
|
|
||
|
/**
|
||
|
Sets a comment for the zip as a whole.
|
||
|
It is written at the end of the zip.
|
||
|
*/
|
||
|
void SetComment(const wxString& comment);
|
||
|
};
|
||
|
|