src/common/fs_arc.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        fs_arc.cpp
// Purpose:     wxArchive file system
// Author:      Vaclav Slavik, Mike Wetherell
// Copyright:   (c) 1999 Vaclav Slavik, (c) 2006 Mike Wetherell
// CVS-ID:      $Id$
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#if wxUSE_FS_ARCHIVE

#include "wx/fs_arc.h"

#ifndef WX_PRECOMP
    #include "wx/intl.h"
    #include "wx/log.h"
#endif

#if WXWIN_COMPATIBILITY_2_6
    #include "wx/zipstrm.h"
#else
    #include "wx/archive.h"
#endif

#include "wx/private/fileback.h"

//---------------------------------------------------------------------------
// wxArchiveFSCacheDataImpl
//
// Holds the catalog of an archive file, and if it is being read from a
// non-seekable stream, a copy of its backing file.
//
// This class is actually the reference counted implementation for the
// wxArchiveFSCacheData class below. It was done that way to allow sharing
// between instances of wxFileSystem, though that's a feature not used in this
// version.
//---------------------------------------------------------------------------

WX_DECLARE_STRING_HASH_MAP(wxArchiveEntry*, wxArchiveFSEntryHash);

struct wxArchiveFSEntry
{
    wxArchiveEntry *entry;
    wxArchiveFSEntry *next;
};

class wxArchiveFSCacheDataImpl
{
public:
    wxArchiveFSCacheDataImpl(const wxArchiveClassFactory& factory,
                             const wxBackingFile& backer);
    wxArchiveFSCacheDataImpl(const wxArchiveClassFactory& factory,
                             wxInputStream *stream);

    ~wxArchiveFSCacheDataImpl();

    void Release() { if (--m_refcount == 0) delete this; }
    wxArchiveFSCacheDataImpl *AddRef() { m_refcount++; return this; }

    wxArchiveEntry *Get(const wxString& name);
    wxInputStream *NewStream() const;

    wxArchiveFSEntry *GetNext(wxArchiveFSEntry *fse);

private:
    wxArchiveFSEntry *AddToCache(wxArchiveEntry *entry);
    void CloseStreams();

    int m_refcount;

    wxArchiveFSEntryHash m_hash;
    wxArchiveFSEntry *m_begin;
    wxArchiveFSEntry **m_endptr;

    wxBackingFile m_backer;
    wxInputStream *m_stream;
    wxArchiveInputStream *m_archive;
};

wxArchiveFSCacheDataImpl::wxArchiveFSCacheDataImpl(
        const wxArchiveClassFactory& factory,
        const wxBackingFile& backer)
 :  m_refcount(1),
    m_begin(NULL),
    m_endptr(&m_begin),
    m_backer(backer),
    m_stream(new wxBackedInputStream(backer)),
    m_archive(factory.NewStream(*m_stream))
{
}

wxArchiveFSCacheDataImpl::wxArchiveFSCacheDataImpl(
        const wxArchiveClassFactory& factory,
        wxInputStream *stream)
 :  m_refcount(1),
    m_begin(NULL),
    m_endptr(&m_begin),
    m_stream(stream),
    m_archive(factory.NewStream(*m_stream))
{
}

wxArchiveFSCacheDataImpl::~wxArchiveFSCacheDataImpl()
{
    WX_CLEAR_HASH_MAP(wxArchiveFSEntryHash, m_hash);

    wxArchiveFSEntry *entry = m_begin;

    while (entry)
    {
        wxArchiveFSEntry *next = entry->next;
        delete entry;
        entry = next;
    }

    CloseStreams();
}

wxArchiveFSEntry *wxArchiveFSCacheDataImpl::AddToCache(wxArchiveEntry *entry)
{
    m_hash[entry->GetName(wxPATH_UNIX)] = entry;
    wxArchiveFSEntry *fse = new wxArchiveFSEntry;
    *m_endptr = fse;
    (*m_endptr)->entry = entry;
    (*m_endptr)->next = NULL;
    m_endptr = &(*m_endptr)->next;
    return fse;
}

void wxArchiveFSCacheDataImpl::CloseStreams()
{
    delete m_archive;
    m_archive = NULL;
    delete m_stream;
    m_stream = NULL;
}

wxArchiveEntry *wxArchiveFSCacheDataImpl::Get(const wxString& name)
{
    wxArchiveFSEntryHash::iterator it = m_hash.find(name);

    if (it != m_hash.end())
        return it->second;

    if (!m_archive)
        return NULL;

    wxArchiveEntry *entry;

    while ((entry = m_archive->GetNextEntry()) != NULL)
    {
        AddToCache(entry);

        if (entry->GetName(wxPATH_UNIX) == name)
            return entry;
    }

    CloseStreams();

    return NULL;
}

wxInputStream* wxArchiveFSCacheDataImpl::NewStream() const
{
    if (m_backer)
        return new wxBackedInputStream(m_backer);
    else
        return NULL;
}

wxArchiveFSEntry *wxArchiveFSCacheDataImpl::GetNext(wxArchiveFSEntry *fse)
{
    wxArchiveFSEntry *next = fse ? fse->next : m_begin;

    if (!next && m_archive)
    {
        wxArchiveEntry *entry = m_archive->GetNextEntry();

        if (entry)
            next = AddToCache(entry);
        else
            CloseStreams();
    }

    return next;
}

//---------------------------------------------------------------------------
// wxArchiveFSCacheData
//
// This is the inteface for wxArchiveFSCacheDataImpl above. Holds the catalog
// of an archive file, and if it is being read from a non-seekable stream, a
// copy of its backing file.
//---------------------------------------------------------------------------

class wxArchiveFSCacheData
{
public:
    wxArchiveFSCacheData() : m_impl(NULL) { }
    wxArchiveFSCacheData(const wxArchiveClassFactory& factory,
                         const wxBackingFile& backer);
    wxArchiveFSCacheData(const wxArchiveClassFactory& factory,
                         wxInputStream *stream);

    wxArchiveFSCacheData(const wxArchiveFSCacheData& data);
    wxArchiveFSCacheData& operator=(const wxArchiveFSCacheData& data);

    ~wxArchiveFSCacheData() { if (m_impl) m_impl->Release(); }

    wxArchiveEntry *Get(const wxString& name) { return m_impl->Get(name); }
    wxInputStream *NewStream() const { return m_impl->NewStream(); }
    wxArchiveFSEntry *GetNext(wxArchiveFSEntry *fse)
        { return m_impl->GetNext(fse); }

private:
    wxArchiveFSCacheDataImpl *m_impl;
};

wxArchiveFSCacheData::wxArchiveFSCacheData(
        const wxArchiveClassFactory& factory,
        const wxBackingFile& backer)
  : m_impl(new wxArchiveFSCacheDataImpl(factory, backer))
{
}

wxArchiveFSCacheData::wxArchiveFSCacheData(
        const wxArchiveClassFactory& factory,
        wxInputStream *stream)
  : m_impl(new wxArchiveFSCacheDataImpl(factory, stream))
{
}

wxArchiveFSCacheData::wxArchiveFSCacheData(const wxArchiveFSCacheData& data)
  : m_impl(data.m_impl ? data.m_impl->AddRef() : NULL)
{
}

wxArchiveFSCacheData& wxArchiveFSCacheData::operator=(
        const wxArchiveFSCacheData& data)
{
    if (data.m_impl != m_impl)
    {
        if (m_impl)
            m_impl->Release();

        m_impl = data.m_impl;

        if (m_impl)
            m_impl->AddRef();
    }

    return *this;
}

//---------------------------------------------------------------------------
// wxArchiveFSCache
//
// wxArchiveFSCacheData caches a single archive, and this class holds a
// collection of them to cache all the archives accessed by this instance
// of wxFileSystem.
//---------------------------------------------------------------------------

WX_DECLARE_STRING_HASH_MAP(wxArchiveFSCacheData, wxArchiveFSCacheDataHash);

class wxArchiveFSCache
{
public:
    wxArchiveFSCache() { }
    ~wxArchiveFSCache() { }

    wxArchiveFSCacheData* Add(const wxString& name,
                              const wxArchiveClassFactory& factory,
                              wxInputStream *stream);

    wxArchiveFSCacheData *Get(const wxString& name);

private:
    wxArchiveFSCacheDataHash m_hash;
};

wxArchiveFSCacheData* wxArchiveFSCache::Add(
        const wxString& name,
        const wxArchiveClassFactory& factory,
        wxInputStream *stream)
{
    wxArchiveFSCacheData& data = m_hash[name];

    if (stream->IsSeekable())
        data = wxArchiveFSCacheData(factory, stream);
    else
        data = wxArchiveFSCacheData(factory, wxBackingFile(stream));

    return &data;
}

wxArchiveFSCacheData *wxArchiveFSCache::Get(const wxString& name)
{
    wxArchiveFSCacheDataHash::iterator it;

    if ((it = m_hash.find(name)) != m_hash.end())
        return &it->second;

    return NULL;
}

//----------------------------------------------------------------------------
// wxArchiveFSHandler
//----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxArchiveFSHandler, wxFileSystemHandler)

wxArchiveFSHandler::wxArchiveFSHandler()
 :  wxFileSystemHandler()
{
    m_Archive = NULL;
    m_FindEntry = NULL;
    m_ZipFile = m_Pattern = m_BaseDir = wxEmptyString;
    m_AllowDirs = m_AllowFiles = true;
    m_DirsFound = NULL;
    m_cache = NULL;
}

wxArchiveFSHandler::~wxArchiveFSHandler()
{
    Cleanup();
    delete m_cache;
}

void wxArchiveFSHandler::Cleanup()
{
    wxDELETE(m_DirsFound);
}

bool wxArchiveFSHandler::CanOpen(const wxString& location)
{
    wxString p = GetProtocol(location);
    return wxArchiveClassFactory::Find(p) != NULL;
}

wxFSFile* wxArchiveFSHandler::OpenFile(
        wxFileSystem& WXUNUSED(fs),
        const wxString& location)
{
    wxString right = GetRightLocation(location);
    wxString left = GetLeftLocation(location);
    wxString protocol = GetProtocol(location);
    wxString key = left + wxT("#") + protocol + wxT(":");

    if (right.Contains(wxT("./")))
    {
        if (right.GetChar(0) != wxT('/')) right = wxT('/') + right;
        wxFileName rightPart(right, wxPATH_UNIX);
        rightPart.Normalize(wxPATH_NORM_DOTS, wxT("/"), wxPATH_UNIX);
        right = rightPart.GetFullPath(wxPATH_UNIX);
    }

    if (right.GetChar(0) == wxT('/')) right = right.Mid(1);

    if (!m_cache)
        m_cache = new wxArchiveFSCache;

    const wxArchiveClassFactory *factory;
    factory = wxArchiveClassFactory::Find(protocol);
    if (!factory)
        return NULL;

    wxArchiveFSCacheData *cached = m_cache->Get(key);
    if (!cached)
    {
        wxFSFile *leftFile = m_fs.OpenFile(left);
        if (!leftFile)
            return NULL;
        cached = m_cache->Add(key, *factory, leftFile->DetachStream());
        delete leftFile;
    }

    wxArchiveEntry *entry = cached->Get(right);
    if (!entry)
        return NULL;

    wxInputStream *leftStream = cached->NewStream();
    if (!leftStream)
    {
        wxFSFile *leftFile = m_fs.OpenFile(left);
        if (!leftFile)
            return NULL;
        leftStream = leftFile->DetachStream();
        delete leftFile;
    }

    wxArchiveInputStream *s = factory->NewStream(leftStream);
    if ( !s )
        return NULL;

    s->OpenEntry(*entry);

    if (!s->IsOk())
    {
        delete s;
        return NULL;
    }

#if WXWIN_COMPATIBILITY_2_6
    if (factory->IsKindOf(CLASSINFO(wxZipClassFactory)))
        ((wxZipInputStream*)s)->m_allowSeeking = true;
#endif // WXWIN_COMPATIBILITY_2_6

    return new wxFSFile(s,
                        key + right,
                        wxEmptyString,
                        GetAnchor(location)
#if wxUSE_DATETIME
                        , entry->GetDateTime()
#endif // wxUSE_DATETIME
                        );
}

wxString wxArchiveFSHandler::FindFirst(const wxString& spec, int flags)
{
    wxString right = GetRightLocation(spec);
    wxString left = GetLeftLocation(spec);
    wxString protocol = GetProtocol(spec);
    wxString key = left + wxT("#") + protocol + wxT(":");

    if (!right.empty() && right.Last() == wxT('/')) right.RemoveLast();

    if (!m_cache)
        m_cache = new wxArchiveFSCache;

    const wxArchiveClassFactory *factory;
    factory = wxArchiveClassFactory::Find(protocol);
    if (!factory)
        return wxEmptyString;

    m_Archive = m_cache->Get(key);
    if (!m_Archive)
    {
        wxFSFile *leftFile = m_fs.OpenFile(left);
        if (!leftFile)
            return wxEmptyString;
        m_Archive = m_cache->Add(key, *factory, leftFile->DetachStream());
        delete leftFile;
    }

    m_FindEntry = NULL;

    switch (flags)
    {
        case wxFILE:
            m_AllowDirs = false, m_AllowFiles = true; break;
        case wxDIR:
            m_AllowDirs = true, m_AllowFiles = false; break;
        default:
            m_AllowDirs = m_AllowFiles = true; break;
    }

    m_ZipFile = key;

    m_Pattern = right.AfterLast(wxT('/'));
    m_BaseDir = right.BeforeLast(wxT('/'));
    if (m_BaseDir.StartsWith(wxT("/")))
        m_BaseDir = m_BaseDir.Mid(1);

    if (m_Archive)
    {
        if (m_AllowDirs)
        {
            delete m_DirsFound;
            m_DirsFound = new wxArchiveFilenameHashMap();
            if (right.empty())  // allow "/" to match the archive root
                return spec;
        }
        return DoFind();
    }
    return wxEmptyString;
}

wxString wxArchiveFSHandler::FindNext()
{
    if (!m_Archive) return wxEmptyString;
    return DoFind();
}

wxString wxArchiveFSHandler::DoFind()
{
    wxString namestr, dir, filename;
    wxString match = wxEmptyString;

    while (match == wxEmptyString)
    {
        m_FindEntry = m_Archive->GetNext(m_FindEntry);

        if (!m_FindEntry)
        {
            m_Archive = NULL;
            m_FindEntry = NULL;
            break;
        }
        namestr = m_FindEntry->entry->GetName(wxPATH_UNIX);

        if (m_AllowDirs)
        {
            dir = namestr.BeforeLast(wxT('/'));
            while (!dir.empty())
            {
                if( m_DirsFound->find(dir) == m_DirsFound->end() )
                {
                    (*m_DirsFound)[dir] = 1;
                    filename = dir.AfterLast(wxT('/'));
                    dir = dir.BeforeLast(wxT('/'));
                    if (!filename.empty() && m_BaseDir == dir &&
                                wxMatchWild(m_Pattern, filename, false))
                        match = m_ZipFile + dir + wxT("/") + filename;
                }
                else
                    break; // already tranversed
            }
        }

        filename = namestr.AfterLast(wxT('/'));
        dir = namestr.BeforeLast(wxT('/'));
        if (m_AllowFiles && !filename.empty() && m_BaseDir == dir &&
                            wxMatchWild(m_Pattern, filename, false))
            match = m_ZipFile + namestr;
    }

    return match;
}

#endif // wxUSE_FS_ARCHIVE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: fs_arc.cpp
	3	// Purpose: wxArchive file system
	4	// Author: Vaclav Slavik, Mike Wetherell
	5	// Copyright: (c) 1999 Vaclav Slavik, (c) 2006 Mike Wetherell
	6	// CVS-ID: $Id$
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#include "wx/wxprec.h"
	11
	12	#ifdef __BORLANDC__
	13	#pragma hdrstop
	14	#endif
	15
	16	#if wxUSE_FS_ARCHIVE
	17
	18	#include "wx/fs_arc.h"
	19
	20	#ifndef WX_PRECOMP
	21	#include "wx/intl.h"
	22	#include "wx/log.h"
	23	#endif
	24
	25	#if WXWIN_COMPATIBILITY_2_6
	26	#include "wx/zipstrm.h"
	27	#else
	28	#include "wx/archive.h"
	29	#endif
	30
	31	#include "wx/private/fileback.h"
	32
	33	//---------------------------------------------------------------------------
	34	// wxArchiveFSCacheDataImpl
	35	//
	36	// Holds the catalog of an archive file, and if it is being read from a
	37	// non-seekable stream, a copy of its backing file.
	38	//
	39	// This class is actually the reference counted implementation for the
	40	// wxArchiveFSCacheData class below. It was done that way to allow sharing
	41	// between instances of wxFileSystem, though that's a feature not used in this
	42	// version.
	43	//---------------------------------------------------------------------------
	44
	45	WX_DECLARE_STRING_HASH_MAP(wxArchiveEntry*, wxArchiveFSEntryHash);
	46
	47	struct wxArchiveFSEntry
	48	{
	49	wxArchiveEntry *entry;
	50	wxArchiveFSEntry *next;
	51	};
	52
	53	class wxArchiveFSCacheDataImpl
	54	{
	55	public:
	56	wxArchiveFSCacheDataImpl(const wxArchiveClassFactory& factory,
	57	const wxBackingFile& backer);
	58	wxArchiveFSCacheDataImpl(const wxArchiveClassFactory& factory,
	59	wxInputStream *stream);
	60
	61	~wxArchiveFSCacheDataImpl();
	62
	63	void Release() { if (--m_refcount == 0) delete this; }
	64	wxArchiveFSCacheDataImpl *AddRef() { m_refcount++; return this; }
	65
	66	wxArchiveEntry *Get(const wxString& name);
	67	wxInputStream *NewStream() const;
	68
	69	wxArchiveFSEntry GetNext(wxArchiveFSEntry fse);
	70
	71	private:
	72	wxArchiveFSEntry AddToCache(wxArchiveEntry entry);
	73	void CloseStreams();
	74
	75	int m_refcount;
	76
	77	wxArchiveFSEntryHash m_hash;
	78	wxArchiveFSEntry *m_begin;
	79	wxArchiveFSEntry **m_endptr;
	80
	81	wxBackingFile m_backer;
	82	wxInputStream *m_stream;
	83	wxArchiveInputStream *m_archive;
	84	};
	85
	86	wxArchiveFSCacheDataImpl::wxArchiveFSCacheDataImpl(
	87	const wxArchiveClassFactory& factory,
	88	const wxBackingFile& backer)
	89	: m_refcount(1),
	90	m_begin(NULL),
	91	m_endptr(&m_begin),
	92	m_backer(backer),
	93	m_stream(new wxBackedInputStream(backer)),
	94	m_archive(factory.NewStream(*m_stream))
	95	{
	96	}
	97
	98	wxArchiveFSCacheDataImpl::wxArchiveFSCacheDataImpl(
	99	const wxArchiveClassFactory& factory,
	100	wxInputStream *stream)
	101	: m_refcount(1),
	102	m_begin(NULL),
	103	m_endptr(&m_begin),
	104	m_stream(stream),
	105	m_archive(factory.NewStream(*m_stream))
	106	{
	107	}
	108
	109	wxArchiveFSCacheDataImpl::~wxArchiveFSCacheDataImpl()
	110	{
	111	WX_CLEAR_HASH_MAP(wxArchiveFSEntryHash, m_hash);
	112
	113	wxArchiveFSEntry *entry = m_begin;
	114
	115	while (entry)
	116	{
	117	wxArchiveFSEntry *next = entry->next;
	118	delete entry;
	119	entry = next;
	120	}
	121
	122	CloseStreams();
	123	}
	124
	125	wxArchiveFSEntry wxArchiveFSCacheDataImpl::AddToCache(wxArchiveEntry entry)
	126	{
	127	m_hash[entry->GetName(wxPATH_UNIX)] = entry;
	128	wxArchiveFSEntry *fse = new wxArchiveFSEntry;
	129	*m_endptr = fse;
	130	(*m_endptr)->entry = entry;
	131	(*m_endptr)->next = NULL;
	132	m_endptr = &(*m_endptr)->next;
	133	return fse;
	134	}
	135
	136	void wxArchiveFSCacheDataImpl::CloseStreams()
	137	{
	138	delete m_archive;
	139	m_archive = NULL;
	140	delete m_stream;
	141	m_stream = NULL;
	142	}
	143
	144	wxArchiveEntry *wxArchiveFSCacheDataImpl::Get(const wxString& name)
	145	{
	146	wxArchiveFSEntryHash::iterator it = m_hash.find(name);
	147
	148	if (it != m_hash.end())
	149	return it->second;
	150
	151	if (!m_archive)
	152	return NULL;
	153
	154	wxArchiveEntry *entry;
	155
	156	while ((entry = m_archive->GetNextEntry()) != NULL)
	157	{
	158	AddToCache(entry);
	159
	160	if (entry->GetName(wxPATH_UNIX) == name)
	161	return entry;
	162	}
	163
	164	CloseStreams();
	165
	166	return NULL;
	167	}
	168
	169	wxInputStream* wxArchiveFSCacheDataImpl::NewStream() const
	170	{
	171	if (m_backer)
	172	return new wxBackedInputStream(m_backer);
	173	else
	174	return NULL;
	175	}
	176
	177	wxArchiveFSEntry wxArchiveFSCacheDataImpl::GetNext(wxArchiveFSEntry fse)
	178	{
	179	wxArchiveFSEntry *next = fse ? fse->next : m_begin;
	180
	181	if (!next && m_archive)
	182	{
	183	wxArchiveEntry *entry = m_archive->GetNextEntry();
	184
	185	if (entry)
	186	next = AddToCache(entry);
	187	else
	188	CloseStreams();
	189	}
	190
	191	return next;
	192	}
	193
	194	//---------------------------------------------------------------------------
	195	// wxArchiveFSCacheData
	196	//
	197	// This is the inteface for wxArchiveFSCacheDataImpl above. Holds the catalog
	198	// of an archive file, and if it is being read from a non-seekable stream, a
	199	// copy of its backing file.
	200	//---------------------------------------------------------------------------
	201
	202	class wxArchiveFSCacheData
	203	{
	204	public:
	205	wxArchiveFSCacheData() : m_impl(NULL) { }
	206	wxArchiveFSCacheData(const wxArchiveClassFactory& factory,
	207	const wxBackingFile& backer);
	208	wxArchiveFSCacheData(const wxArchiveClassFactory& factory,
	209	wxInputStream *stream);
	210
	211	wxArchiveFSCacheData(const wxArchiveFSCacheData& data);
	212	wxArchiveFSCacheData& operator=(const wxArchiveFSCacheData& data);
	213
	214	~wxArchiveFSCacheData() { if (m_impl) m_impl->Release(); }
	215
	216	wxArchiveEntry *Get(const wxString& name) { return m_impl->Get(name); }
	217	wxInputStream *NewStream() const { return m_impl->NewStream(); }
	218	wxArchiveFSEntry GetNext(wxArchiveFSEntry fse)
	219	{ return m_impl->GetNext(fse); }
	220
	221	private:
	222	wxArchiveFSCacheDataImpl *m_impl;
	223	};
	224
	225	wxArchiveFSCacheData::wxArchiveFSCacheData(
	226	const wxArchiveClassFactory& factory,
	227	const wxBackingFile& backer)
	228	: m_impl(new wxArchiveFSCacheDataImpl(factory, backer))
	229	{
	230	}
	231
	232	wxArchiveFSCacheData::wxArchiveFSCacheData(
	233	const wxArchiveClassFactory& factory,
	234	wxInputStream *stream)
	235	: m_impl(new wxArchiveFSCacheDataImpl(factory, stream))
	236	{
	237	}
	238
	239	wxArchiveFSCacheData::wxArchiveFSCacheData(const wxArchiveFSCacheData& data)
	240	: m_impl(data.m_impl ? data.m_impl->AddRef() : NULL)
	241	{
	242	}
	243
	244	wxArchiveFSCacheData& wxArchiveFSCacheData::operator=(
	245	const wxArchiveFSCacheData& data)
	246	{
	247	if (data.m_impl != m_impl)
	248	{
	249	if (m_impl)
	250	m_impl->Release();
	251
	252	m_impl = data.m_impl;
	253
	254	if (m_impl)
	255	m_impl->AddRef();
	256	}
	257
	258	return *this;
	259	}
	260
	261	//---------------------------------------------------------------------------
	262	// wxArchiveFSCache
	263	//
	264	// wxArchiveFSCacheData caches a single archive, and this class holds a
	265	// collection of them to cache all the archives accessed by this instance
	266	// of wxFileSystem.
	267	//---------------------------------------------------------------------------
	268
	269	WX_DECLARE_STRING_HASH_MAP(wxArchiveFSCacheData, wxArchiveFSCacheDataHash);
	270
	271	class wxArchiveFSCache
	272	{
	273	public:
	274	wxArchiveFSCache() { }
	275	~wxArchiveFSCache() { }
	276
	277	wxArchiveFSCacheData* Add(const wxString& name,
	278	const wxArchiveClassFactory& factory,
	279	wxInputStream *stream);
	280
	281	wxArchiveFSCacheData *Get(const wxString& name);
	282
	283	private:
	284	wxArchiveFSCacheDataHash m_hash;
	285	};
	286
	287	wxArchiveFSCacheData* wxArchiveFSCache::Add(
	288	const wxString& name,
	289	const wxArchiveClassFactory& factory,
	290	wxInputStream *stream)
	291	{
	292	wxArchiveFSCacheData& data = m_hash[name];
	293
	294	if (stream->IsSeekable())
	295	data = wxArchiveFSCacheData(factory, stream);
	296	else
	297	data = wxArchiveFSCacheData(factory, wxBackingFile(stream));
	298
	299	return &data;
	300	}
	301
	302	wxArchiveFSCacheData *wxArchiveFSCache::Get(const wxString& name)
	303	{
	304	wxArchiveFSCacheDataHash::iterator it;
	305
	306	if ((it = m_hash.find(name)) != m_hash.end())
	307	return &it->second;
	308
	309	return NULL;
	310	}
	311
	312	//----------------------------------------------------------------------------
	313	// wxArchiveFSHandler
	314	//----------------------------------------------------------------------------
	315
	316	IMPLEMENT_DYNAMIC_CLASS(wxArchiveFSHandler, wxFileSystemHandler)
	317
	318	wxArchiveFSHandler::wxArchiveFSHandler()
	319	: wxFileSystemHandler()
	320	{
	321	m_Archive = NULL;
	322	m_FindEntry = NULL;
	323	m_ZipFile = m_Pattern = m_BaseDir = wxEmptyString;
	324	m_AllowDirs = m_AllowFiles = true;
	325	m_DirsFound = NULL;
	326	m_cache = NULL;
	327	}
	328
	329	wxArchiveFSHandler::~wxArchiveFSHandler()
	330	{
	331	Cleanup();
	332	delete m_cache;
	333	}
	334
	335	void wxArchiveFSHandler::Cleanup()
	336	{
	337	wxDELETE(m_DirsFound);
	338	}
	339
	340	bool wxArchiveFSHandler::CanOpen(const wxString& location)
	341	{
	342	wxString p = GetProtocol(location);
	343	return wxArchiveClassFactory::Find(p) != NULL;
	344	}
	345
	346	wxFSFile* wxArchiveFSHandler::OpenFile(
	347	wxFileSystem& WXUNUSED(fs),
	348	const wxString& location)
	349	{
	350	wxString right = GetRightLocation(location);
	351	wxString left = GetLeftLocation(location);
	352	wxString protocol = GetProtocol(location);
	353	wxString key = left + wxT("#") + protocol + wxT(":");
	354
	355	if (right.Contains(wxT("./")))
	356	{
	357	if (right.GetChar(0) != wxT('/')) right = wxT('/') + right;
	358	wxFileName rightPart(right, wxPATH_UNIX);
	359	rightPart.Normalize(wxPATH_NORM_DOTS, wxT("/"), wxPATH_UNIX);
	360	right = rightPart.GetFullPath(wxPATH_UNIX);
	361	}
	362
	363	if (right.GetChar(0) == wxT('/')) right = right.Mid(1);
	364
	365	if (!m_cache)
	366	m_cache = new wxArchiveFSCache;
	367
	368	const wxArchiveClassFactory *factory;
	369	factory = wxArchiveClassFactory::Find(protocol);
	370	if (!factory)
	371	return NULL;
	372
	373	wxArchiveFSCacheData *cached = m_cache->Get(key);
	374	if (!cached)
	375	{
	376	wxFSFile *leftFile = m_fs.OpenFile(left);
	377	if (!leftFile)
	378	return NULL;
	379	cached = m_cache->Add(key, *factory, leftFile->DetachStream());
	380	delete leftFile;
	381	}
	382
	383	wxArchiveEntry *entry = cached->Get(right);
	384	if (!entry)
	385	return NULL;
	386
	387	wxInputStream *leftStream = cached->NewStream();
	388	if (!leftStream)
	389	{
	390	wxFSFile *leftFile = m_fs.OpenFile(left);
	391	if (!leftFile)
	392	return NULL;
	393	leftStream = leftFile->DetachStream();
	394	delete leftFile;
	395	}
	396
	397	wxArchiveInputStream *s = factory->NewStream(leftStream);
	398	if ( !s )
	399	return NULL;
	400
	401	s->OpenEntry(*entry);
	402
	403	if (!s->IsOk())
	404	{
	405	delete s;
	406	return NULL;
	407	}
	408
	409	#if WXWIN_COMPATIBILITY_2_6
	410	if (factory->IsKindOf(CLASSINFO(wxZipClassFactory)))
	411	((wxZipInputStream*)s)->m_allowSeeking = true;
	412	#endif // WXWIN_COMPATIBILITY_2_6
	413
	414	return new wxFSFile(s,
	415	key + right,
	416	wxEmptyString,
	417	GetAnchor(location)
	418	#if wxUSE_DATETIME
	419	, entry->GetDateTime()
	420	#endif // wxUSE_DATETIME
	421	);
	422	}
	423
	424	wxString wxArchiveFSHandler::FindFirst(const wxString& spec, int flags)
	425	{
	426	wxString right = GetRightLocation(spec);
	427	wxString left = GetLeftLocation(spec);
	428	wxString protocol = GetProtocol(spec);
	429	wxString key = left + wxT("#") + protocol + wxT(":");
	430
	431	if (!right.empty() && right.Last() == wxT('/')) right.RemoveLast();
	432
	433	if (!m_cache)
	434	m_cache = new wxArchiveFSCache;
	435
	436	const wxArchiveClassFactory *factory;
	437	factory = wxArchiveClassFactory::Find(protocol);
	438	if (!factory)
	439	return wxEmptyString;
	440
	441	m_Archive = m_cache->Get(key);
	442	if (!m_Archive)
	443	{
	444	wxFSFile *leftFile = m_fs.OpenFile(left);
	445	if (!leftFile)
	446	return wxEmptyString;
	447	m_Archive = m_cache->Add(key, *factory, leftFile->DetachStream());
	448	delete leftFile;
	449	}
	450
	451	m_FindEntry = NULL;
	452
	453	switch (flags)
	454	{
	455	case wxFILE:
	456	m_AllowDirs = false, m_AllowFiles = true; break;
	457	case wxDIR:
	458	m_AllowDirs = true, m_AllowFiles = false; break;
	459	default:
	460	m_AllowDirs = m_AllowFiles = true; break;
	461	}
	462
	463	m_ZipFile = key;
	464
	465	m_Pattern = right.AfterLast(wxT('/'));
	466	m_BaseDir = right.BeforeLast(wxT('/'));
	467	if (m_BaseDir.StartsWith(wxT("/")))
	468	m_BaseDir = m_BaseDir.Mid(1);
	469
	470	if (m_Archive)
	471	{
	472	if (m_AllowDirs)
	473	{
	474	delete m_DirsFound;
	475	m_DirsFound = new wxArchiveFilenameHashMap();
	476	if (right.empty()) // allow "/" to match the archive root
	477	return spec;
	478	}
	479	return DoFind();
	480	}
	481	return wxEmptyString;
	482	}
	483
	484	wxString wxArchiveFSHandler::FindNext()
	485	{
	486	if (!m_Archive) return wxEmptyString;
	487	return DoFind();
	488	}
	489
	490	wxString wxArchiveFSHandler::DoFind()
	491	{
	492	wxString namestr, dir, filename;
	493	wxString match = wxEmptyString;
	494
	495	while (match == wxEmptyString)
	496	{
	497	m_FindEntry = m_Archive->GetNext(m_FindEntry);
	498
	499	if (!m_FindEntry)
	500	{
	501	m_Archive = NULL;
	502	m_FindEntry = NULL;
	503	break;
	504	}
	505	namestr = m_FindEntry->entry->GetName(wxPATH_UNIX);
	506
	507	if (m_AllowDirs)
	508	{
	509	dir = namestr.BeforeLast(wxT('/'));
	510	while (!dir.empty())
	511	{
	512	if( m_DirsFound->find(dir) == m_DirsFound->end() )
	513	{
	514	(*m_DirsFound)[dir] = 1;
	515	filename = dir.AfterLast(wxT('/'));
	516	dir = dir.BeforeLast(wxT('/'));
	517	if (!filename.empty() && m_BaseDir == dir &&
	518	wxMatchWild(m_Pattern, filename, false))
	519	match = m_ZipFile + dir + wxT("/") + filename;
	520	}
	521	else
	522	break; // already tranversed
	523	}
	524	}
	525
	526	filename = namestr.AfterLast(wxT('/'));
	527	dir = namestr.BeforeLast(wxT('/'));
	528	if (m_AllowFiles && !filename.empty() && m_BaseDir == dir &&
	529	wxMatchWild(m_Pattern, filename, false))
	530	match = m_ZipFile + namestr;
	531	}
	532
	533	return match;
	534	}
	535
	536	#endif // wxUSE_FS_ARCHIVE