00375592f9
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30436 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
649 lines
20 KiB
TeX
649 lines
20 KiB
TeX
%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveClassFactory}}\label{wxarchiveclassfactory}
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An abstract base class which serves as a common interface to
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archive class factories such as \helpref{wxZipClassFactory}{wxzipclassfactory}.
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For each supported archive type (such as zip) there is a class factory
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derived from wxArchiveClassFactory, which allows archive objects to be
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created in a generic way, without knowing the particular type of archive
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being used.
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\wxheading{Derived from}
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{See also}
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\helpref{Archive formats such as zip}{wxarc}\\
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\helpref{Generic archive programming}{wxarcgeneric}\\
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\helpref{wxArchiveEntry}{wxarchiveentry}\\
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\helpref{wxArchiveInputStream}{wxarchiveinputstream}\\
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\helpref{wxArchiveOutputStream}{wxarchiveoutputstream}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveClassFactory::Get/SetConv}\label{wxarchiveclassfactoryconv}
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\constfunc{wxMBConv\&}{GetConv}{\void}
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\func{void}{SetConv}{\param{wxMBConv\& }{conv}}
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The \helpref{wxMBConv}{wxmbconv} object that the created streams
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will use when translating meta-data. The initial default, set by the
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constructor, is wxConvLocal.
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\membersection{wxArchiveClassFactory::GetInternalName}\label{wxarchiveclassfactorygetinternalname}
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\constfunc{wxString}{GetInternalName}{\param{const wxString\& }{name}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Calls the static GetInternalName() function for the archive entry type,
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for example
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\helpref{wxZipEntry::GetInternalName()}{wxzipentrygetinternalname}.
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\membersection{wxArchiveClassFactory::NewEntry}\label{wxarchiveclassfactorynewentry}
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\constfunc{wxArchiveEntry*}{NewEntry}{\void}
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Create a new \helpref{wxArchiveEntry}{wxarchiveentry} object of the
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appropriate type.
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\membersection{wxArchiveClassFactory::NewStream}\label{wxarchiveclassfactorynewstream}
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\constfunc{wxArchiveInputStream*}{NewStream}{\param{wxInputStream\& }{stream}}
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\constfunc{wxArchiveOutputStream*}{NewStream}{\param{wxOutputStream\& }{stream}}
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Create a new \helpref{wxArchiveInputStream}{wxarchiveinputstream}
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or \helpref{wxArchiveOutputStream}{wxarchiveoutputstream} of the
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appropriate type.
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%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveEntry}}\label{wxarchiveentry}
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An abstract base class which serves as a common interface to
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archive entry classes such as \helpref{wxZipEntry}{wxzipentry}.
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These hold the meta-data (filename, timestamp, etc.), for entries
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in archive files such as zips and tars.
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\wxheading{Derived from}
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{See also}
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\helpref{Archive formats such as zip}{wxarc}\\
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\helpref{Generic archive programming}{wxarcgeneric}\\
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\helpref{wxArchiveInputStream}{wxarchiveinputstream}\\
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\helpref{wxArchiveOutputStream}{wxarchiveoutputstream}\\
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\helpref{wxArchiveNotifier}{wxarchivenotifier}
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\wxheading{Non-seekable streams}
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This information applies only when reading archives from non-seekable
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streams. When the stream is
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seekable \helpref{GetNextEntry()}{wxarchiveinputstreamgetnextentry}
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returns a fully populated \helpref{wxArchiveEntry}{wxarchiveentry}.
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See '\helpref{Archives on non-seekable streams}{wxarcnoseek}' for
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more information.
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For generic programming, when the worst case must be assumed, you can
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rely on all the fields of wxArchiveEntry being fully populated when
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GetNextEntry() returns, with the the following exceptions:
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\begin{twocollist}\twocolwidtha{3cm}
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\twocolitem{\helpref{GetSize()}{wxarchiveentrysize}}{Guaranteed to be
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available after the entry has been read to \helpref{Eof()}{wxinputstreameof},
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or \helpref{CloseEntry()}{wxarchiveinputstreamcloseentry} has been called}
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\twocolitem{\helpref{IsReadOnly()}{wxarchiveentryisreadonly}}{Guaranteed to
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be available after the end of the archive has been reached, i.e. after
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GetNextEntry() returns NULL and Eof() is true}
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\end{twocollist}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveEntry::Clone}\label{wxarchiveentryclone}
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\constfunc{wxArchiveEntry*}{Clone}{\void}
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Returns a copy of this entry object.
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\membersection{wxArchiveEntry::Get/SetDateTime}\label{wxarchiveentrydatetime}
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\constfunc{wxDateTime}{GetDateTime}{\void}
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\func{void}{SetDateTime}{\param{const wxDateTime\& }{dt}}
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The entry's timestamp.
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\membersection{wxArchiveEntry::GetInternalFormat}\label{wxarchiveentrygetinternalformat}
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\constfunc{wxPathFormat}{GetInternalFormat}{\void}
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Returns the path format used internally within the archive to store
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filenames.
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\membersection{wxArchiveEntry::GetInternalName}\label{wxarchiveentrygetinternalname}
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\constfunc{wxString}{GetInternalName}{\void}
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Returns the entry's filename in the internal format used within the
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archive. The name can include directory components, i.e. it can be a
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full path.
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The names of directory entries are returned without any trailing path
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separator. This gives a canonical name that can be used in comparisons.
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\wxheading{See also}
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\helpref{Looking up an archive entry by name}{wxarcbyname}
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\membersection{wxArchiveEntry::Get/SetName}\label{wxarchiveentryname}
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\constfunc{wxString}{GetName}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\func{void}{SetName}{\param{const wxString\& }{name}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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The entry's name, by default in the native format. The name can include
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directory components, i.e. it can be a full path.
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If this is a directory entry, (i.e. if \helpref{IsDir()}{wxarchiveentryisdir}
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is true) then GetName() returns the name with a trailing path separator.
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Similarly, setting a name with a trailing path separator sets IsDir().
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\membersection{wxArchiveEntry::GetOffset}\label{wxarchiveentrygetoffset}
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\constfunc{off\_t}{GetOffset}{\void}
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Returns a numeric value unique to the entry within the archive.
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\membersection{wxArchiveEntry::Get/SetSize}\label{wxarchiveentrysize}
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\constfunc{off\_t}{GetSize}{\void}
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\func{void}{SetSize}{\param{off\_t }{size}}
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The size of the entry's data in bytes.
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\membersection{wxArchiveEntry::IsDir/SetIsDir}\label{wxarchiveentryisdir}
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\constfunc{bool}{IsDir}{\void}
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\func{void}{SetIsDir}{\param{bool }{isDir = true}}
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True if this is a directory entry.
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Directory entries are entries with no data, which are used to store
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the meta-data of directories. They also make it possible for completely
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empty directories to be stored.
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The names of entries within an archive can be complete paths, and
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unarchivers typically create whatever directories are necessary as they
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restore files, even if the archive contains no explicit directory entries.
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\membersection{wxArchiveEntry::IsReadOnly/SetIsReadOnly}\label{wxarchiveentryisreadonly}
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\constfunc{bool}{IsReadOnly}{\void}
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\func{void}{SetIsReadOnly}{\param{bool }{isReadOnly = true}}
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True if the entry is a read-only file.
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\membersection{wxArchiveEntry::Set/UnsetNotifier}\label{wxarchiveentrynotifier}
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\func{void}{SetNotifier}{\param{wxArchiveNotifier\& }{notifier}}
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\func{void}{UnsetNotifier}{\void}
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Sets the \helpref{notifier}{wxarchivenotifier} for this entry.
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Whenever the \helpref{wxArchiveInputStream}{wxarchiveinputstream} updates
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this entry, it will then invoke the associated
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notifier's \helpref{OnEntryUpdated}{wxarchivenotifieronentryupdated}
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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 archive in a pipeline (i.e. between
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non-seekable streams).
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\wxheading{See also}
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\helpref{Archives on non-seekable streams}{wxarcnoseek}\\
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\helpref{wxArchiveNotifier}{wxarchivenotifier}
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%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveInputStream}}\label{wxarchiveinputstream}
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An abstract base class which serves as a common interface to
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archive input streams such as \helpref{wxZipInputStream}{wxzipinputstream}.
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\helpref{GetNextEntry()}{wxarchiveinputstreamgetnextentry} returns an
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\helpref{wxArchiveEntry}{wxarchiveentry} object containing the meta-data
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for the next entry in the archive (and gives away ownership). Reading from
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the wxArchiveInputStream then returns the entry's data. Eof() becomes true
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after an attempt has been made to read past the end of the entry's data.
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When there are no more entries, GetNextEntry() returns NULL and sets Eof().
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\wxheading{Derived from}
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\helpref{wxFilterInputStream}{wxfilterinputstream}
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{Data structures}
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{\small \begin{verbatim}
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typedef wxArchiveEntry entry\_type
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\end{verbatim}}
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\wxheading{See also}
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\helpref{Archive formats such as zip}{wxarc}\\
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\helpref{wxArchiveEntry}{wxarchiveentry}\\
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\helpref{wxArchiveOutputStream}{wxarchiveoutputstream}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveInputStream::CloseEntry}\label{wxarchiveinputstreamcloseentry}
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\func{bool}{CloseEntry}{\void}
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Closes the current entry. On a non-seekable stream reads to the end of
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the current entry first.
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\membersection{wxArchiveInputStream::GetNextEntry}\label{wxarchiveinputstreamgetnextentry}
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\func{wxArchiveEntry*}{GetNextEntry}{\void}
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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 \helpref{wxArchiveEntry}{wxarchiveentry}
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object, giving away ownership. Reading this wxArchiveInputStream then
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returns the entry's data.
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\membersection{wxArchiveInputStream::OpenEntry}\label{wxarchiveinputstreamopenentry}
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\func{bool}{OpenEntry}{\param{wxArchiveEntry\& }{entry}}
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Closes the current entry if one is open, then opens the entry specified
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by the \helpref{wxArchiveEntry}{wxarchiveentry} object.
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{\it entry} must be from the same archive file that this
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wxArchiveInputStream is reading, and it must be reading it from a
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seekable stream.
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\wxheading{See also}
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\helpref{Looking up an archive entry by name}{wxarcbyname}
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%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveIterator}}\label{wxarchiveiterator}
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An input iterator template class that can be used to transfer an archive's
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catalogue to a container. It is only available if wxUSE\_STL is set to 1
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in setup.h, and the uses for it outlined below require a compiler which
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supports member templates.
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\begin{verbatim}
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template <class Arc, class T = typename Arc::entry_type*>
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class wxArchiveIterator
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{
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// this constructor creates an 'end of sequence' object
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wxArchiveIterator();
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// template parameter 'Arc' should be the type of an archive input stream
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wxArchiveIterator(Arc& arc) {
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/* ... */
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};
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\end{verbatim}
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The first template parameter should be the type of archive input stream
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(e.g. \helpref{wxArchiveInputStream}{wxarchiveinputstream}) and the
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second can either be a pointer to an entry
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(e.g. \helpref{wxArchiveEntry}{wxarchiveentry}*), or a string/pointer pair
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(e.g. std::pair<wxString, wxArchiveEntry*>).
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The {\tt <wx/archive.h>} header defines the following typedefs:
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\begin{verbatim}
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typedef wxArchiveIterator<wxArchiveInputStream> wxArchiveIter;
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typedef wxArchiveIterator<wxArchiveInputStream,
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std::pair<wxString, wxArchiveEntry*> > wxArchivePairIter;
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\end{verbatim}
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The header for any implementation of this interface should define similar
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typedefs for its types, for example in {\tt <wx/zipstrm.h>} there is:
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\begin{verbatim}
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typedef wxArchiveIterator<wxZipInputStream> wxZipIter;
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typedef wxArchiveIterator<wxZipInputStream,
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std::pair<wxString, wxZipEntry*> > wxZipPairIter;
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\end{verbatim}
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Transferring the catalogue of an archive {\it arc} to a vector {\it cat},
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can then be done something like this:
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\begin{verbatim}
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std::vector<wxArchiveEntry*> cat((wxArchiveIter)arc, wxArchiveIter());
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\end{verbatim}
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When the iterator is dereferenced, it gives away ownership of an entry
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object. So in the above example, when you have finished with {\it cat}
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you must delete the pointers it contains.
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If you have smart pointers with normal copy semantics (i.e. not auto\_ptr
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or \helpref{wxScopedPtr}{wxscopedptr}), then you can create an iterator
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which uses them instead. For example, with a smart pointer class for
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zip entries {\it ZipEntryPtr}:
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\begin{verbatim}
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typedef std::vector<ZipEntryPtr> ZipCatalog;
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typedef wxArchiveIterator<wxZipInputStream, ZipEntryPtr> ZipIter;
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ZipCatalog cat((ZipIter)zip, ZipIter());
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\end{verbatim}
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Iterators that return std::pair objects can be used to
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populate a std::multimap, to allow entries to be looked
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up by name. The string is initialised using the wxArchiveEntry object's
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\helpref{GetInternalName()}{wxarchiveentrygetinternalname} function.
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\begin{verbatim}
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typedef std::multimap<wxString, wxZipEntry*> ZipCatalog;
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ZipCatalog cat((wxZipPairIter)zip, wxZipPairIter());
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\end{verbatim}
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Note that this iterator also gives away ownership of an entry
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object each time it is dereferenced. So in the above example, when
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you have finished with {\it cat} you must delete the pointers it contains.
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Or if you have them, a pair containing a smart pointer can be used
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(again {\it ZipEntryPtr}), no worries about ownership:
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\begin{verbatim}
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typedef std::multimap<wxString, ZipEntryPtr> ZipCatalog;
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typedef wxArchiveIterator<wxZipInputStream,
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std::pair<wxString, ZipEntryPtr> > ZipPairIter;
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ZipCatalog cat((ZipPairIter)zip, ZipPairIter());
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\end{verbatim}
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\wxheading{Derived from}
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No base class
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{See also}
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\helpref{wxArchiveEntry}{wxarchiveentry}\\
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\helpref{wxArchiveInputStream}{wxarchiveinputstream}\\
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\helpref{wxArchiveOutputStream}{wxarchiveoutputstream}
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\wxheading{Data structures}
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{\small \begin{verbatim}
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typedef std::input\_iterator\_tag iterator\_category
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typedef T value\_type
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typedef ptrdiff\_t difference\_type
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typedef T* pointer
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typedef T\& reference
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\end{verbatim}}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveIterator::wxArchiveIterator}\label{wxarchiveiteratorwxarchiveiterator}
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\func{}{wxArchiveIterator}{\void}
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Construct an 'end of sequence' instance.
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\func{}{wxArchiveIterator}{\param{Arc\& }{arc}}
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Construct iterator that returns all the entries in the archive input
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stream {\it arc}.
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\membersection{wxArchiveIterator::operator*}\label{wxarchiveiteratoroperatorunknown}
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\constfunc{const T\&}{operator*}{\void}
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Returns an entry object from the archive input stream, giving away
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ownership.
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\membersection{wxArchiveIterator::operator++}\label{wxarchiveiteratoroperatorunknown}
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\func{wxArchiveIterator\&}{operator++}{\void}
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\func{wxArchiveIterator\&}{operator++}{\param{int}{}}
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Position the input iterator at the next entry in the archive input stream.
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%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveNotifier}}\label{wxarchivenotifier}
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If you need to know when a
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\helpref{wxArchiveInputStream}{wxarchiveinputstream} updates a
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\helpref{wxArchiveEntry}{wxarchiveentry} object, you can create
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a notifier by deriving from this abstract base class, overriding
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\helpref{OnEntryUpdated()}{wxarchivenotifieronentryupdated}. An instance
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of your notifier class can then be assigned to the wxArchiveEntry object
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using \helpref{wxArchiveEntry::SetNotifier()}{wxarchiveentrynotifier}.
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Your OnEntryUpdated() method will then be invoked whenever the input
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stream updates the entry.
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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 archive in a pipeline (i.e. between
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non-seekable streams).
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See \helpref{Archives on non-seekable streams}{wxarcnoseek}.
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\wxheading{Derived from}
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No base class
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{See also}
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\helpref{Archives on non-seekable streams}{wxarcnoseek}\\
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\helpref{wxArchiveEntry}{wxarchiveentry}\\
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\helpref{wxArchiveInputStream}{wxarchiveinputstream}\\
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\helpref{wxArchiveOutputStream}{wxarchiveoutputstream}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveNotifier::OnEntryUpdated}\label{wxarchivenotifieronentryupdated}
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\func{void}{OnEntryUpdated}{\param{class wxArchiveEntry\& }{entry}}
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This method must be overridden in your derived class.
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%
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% automatically generated by HelpGen $Revision$ from
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% wx/archive.h at 16/Sep/04 12:19:29
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%
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\section{\class{wxArchiveOutputStream}}\label{wxarchiveoutputstream}
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An abstract base class which serves as a common interface to
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archive output streams such as \helpref{wxZipOutputStream}{wxzipoutputstream}.
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\helpref{PutNextEntry()}{wxarchiveoutputstreamputnextentry} is used
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to create a new entry in the output archive, then the entry's data is
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written to the wxArchiveOutputStream. Another call to PutNextEntry()
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closes the current entry and begins the next.
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\wxheading{Derived from}
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\helpref{wxFilterOutputStream}{wxfilteroutputstream}
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\wxheading{Include files}
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<wx/archive.h>
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\wxheading{See also}
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\helpref{Archive formats such as zip}{wxarc}\\
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\helpref{wxArchiveEntry}{wxarchiveentry}\\
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\helpref{wxArchiveInputStream}{wxarchiveinputstream}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxArchiveOutputStream::\destruct{wxArchiveOutputStream}}\label{wxarchiveoutputstreamdtor}
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\func{}{\destruct{wxArchiveOutputStream}}{\void}
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Calls \helpref{Close()}{wxarchiveoutputstreamclose} if it has not already
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been called.
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\membersection{wxArchiveOutputStream::Close}\label{wxarchiveoutputstreamclose}
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\func{bool}{Close}{\void}
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Closes the archive, returning true if it was successfully written.
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Called by the destructor if not called explicitly.
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\membersection{wxArchiveOutputStream::CloseEntry}\label{wxarchiveoutputstreamcloseentry}
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\func{bool}{CloseEntry}{\void}
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Close the current entry. It is called implicitly whenever another new
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entry is created with \helpref{CopyEntry()}{wxarchiveoutputstreamcopyentry}
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or \helpref{PutNextEntry()}{wxarchiveoutputstreamputnextentry}, or
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when the archive is closed.
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\membersection{wxArchiveOutputStream::CopyArchiveMetaData}\label{wxarchiveoutputstreamcopyarchivemetadata}
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\func{bool}{CopyArchiveMetaData}{\param{wxArchiveInputStream\& }{stream}}
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Some archive formats have additional meta-data that applies to the archive
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|
as a whole. For example in the case of zip there is a comment, which
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|
is stored at the end of the zip file. CopyArchiveMetaData() can be used
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|
to transfer such information when writing a modified copy of an archive.
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Since the position of the meta-data can vary between the various archive
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|
formats, it is best to call CopyArchiveMetaData() before transferring
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the entries. The \helpref{wxArchiveOutputStream}{wxarchiveoutputstream}
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will then hold on to the meta-data and write it at the correct point in
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the output file.
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When the input archive is being read from a non-seekable stream, the
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meta-data may not be available when CopyArchiveMetaData() is called,
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in which case the two streams set up a link and transfer the data
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when it becomes available.
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\membersection{wxArchiveOutputStream::CopyEntry}\label{wxarchiveoutputstreamcopyentry}
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\func{bool}{CopyEntry}{\param{wxArchiveEntry* }{entry}, \param{wxArchiveInputStream\& }{stream}}
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Takes ownership of {\it entry} and uses it to create a new entry in the
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archive. {\it entry} is then opened in the input stream {\it stream}
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and its contents copied to this stream.
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For archive types which compress entry data, CopyEntry() is likely to be
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much more efficient than transferring the data using Read() and Write()
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since it will copy them without decompressing and recompressing them.
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{\it entry} must be from the same archive file that {\it stream} is
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accessing. For non-seekable streams, {\it entry} must also be the last
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thing read from {\it stream}.
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\membersection{wxArchiveOutputStream::PutNextDirEntry}\label{wxarchiveoutputstreamputnextdirentry}
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\func{bool}{PutNextDirEntry}{\param{const wxString\& }{name}, \param{const wxDateTime\& }{dt = wxDateTime::Now()}}
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Create a new directory entry
|
|
(see \helpref{wxArchiveEntry::IsDir()}{wxarchiveentryisdir})
|
|
with the given name and timestamp.
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\helpref{PutNextEntry()}{wxarchiveoutputstreamputnextentry} can
|
|
also be used to create directory entries, by supplying a name with
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a trailing path separator.
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\membersection{wxArchiveOutputStream::PutNextEntry}\label{wxarchiveoutputstreamputnextentry}
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\func{bool}{PutNextEntry}{\param{wxArchiveEntry* }{entry}}
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|
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|
Takes ownership of {\it entry} and uses it to create a new entry in
|
|
the archive. The entry's data can then be written by writing to this
|
|
wxArchiveOutputStream.
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\func{bool}{PutNextEntry}{\param{const wxString\& }{name}, \param{const wxDateTime\& }{dt = wxDateTime::Now()}, \param{off\_t }{size = wxInvalidOffset}}
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|
Create a new entry with the given name, timestamp and size. The entry's
|
|
data can then be written by writing to this wxArchiveOutputStream.
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