src/common/zipstrm.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        zipstrm.cpp
   3 // Purpose:     Streams for Zip files
   4 // Author:      Mike Wetherell
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Mike Wetherell
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11   #pragma implementation "zipstrm.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18   #pragma hdrstop
  19 #endif
  20
  21 #ifndef WX_PRECOMP
  22   #include "wx/defs.h"
  23 #endif
  24
  25 #if wxUSE_ZLIB && wxUSE_STREAMS && wxUSE_ZIPSTREAM
  26
  27 #include "wx/zipstrm.h"
  28 #include "wx/log.h"
  29 #include "wx/intl.h"
  30 #include "wx/datstrm.h"
  31 #include "wx/zstream.h"
  32 #include "wx/mstream.h"
  33 #include "wx/utils.h"
  34 #include "wx/buffer.h"
  35 #include "wx/ptr_scpd.h"
  36 #include "wx/wfstream.h"
  37 #include "wx/html/forcelnk.h"
  38 #include "zlib.h"
  39
  40 // value for the 'version needed to extract' field (20 means 2.0)
  41 enum {
  42     VERSION_NEEDED_TO_EXTRACT = 20
  43 };
  44
  45 // signatures for the various records (PKxx)
  46 enum {
  47     CENTRAL_MAGIC = 0x02014b50,     // central directory record
  48     LOCAL_MAGIC   = 0x04034b50,     // local header
  49     END_MAGIC     = 0x06054b50,     // end of central directory record
  50     SUMS_MAGIC    = 0x08074b50      // data descriptor (info-zip)
  51 };
  52
  53 // unix file attributes. zip stores them in the high 16 bits of the
  54 // 'external attributes' field, hence the extra zeros.
  55 enum {
  56     wxZIP_S_IFMT  = 0xF0000000,
  57     wxZIP_S_IFDIR = 0x40000000,
  58     wxZIP_S_IFREG = 0x80000000
  59 };
  60
  61 // minimum sizes for the various records
  62 enum {
  63     CENTRAL_SIZE  = 46,
  64     LOCAL_SIZE    = 30,
  65     END_SIZE      = 22,
  66     SUMS_SIZE     = 12
  67 };
  68
  69 // The number of bytes that must be written to an wxZipOutputStream before
  70 // a zip entry is created. The purpose of this latency is so that
  71 // OpenCompressor() can see a little data before deciding which compressor
  72 // it should use.
  73 enum {
  74     OUTPUT_LATENCY = 4096
  75 };
  76
  77 // Some offsets into the local header
  78 enum {
  79     SUMS_OFFSET  = 14
  80 };
  81
  82 IMPLEMENT_DYNAMIC_CLASS(wxZipEntry, wxArchiveEntry)
  83 IMPLEMENT_DYNAMIC_CLASS(wxZipClassFactory, wxArchiveClassFactory)
  84
  85 FORCE_LINK_ME(zipstrm)
  86
  87
  88 /////////////////////////////////////////////////////////////////////////////
  89 // Helpers
  90
  91 // read a string of a given length
  92 //
  93 static wxString ReadString(wxInputStream& stream, wxUint16 len, wxMBConv& conv)
  94 {
  95 #if wxUSE_UNICODE
  96     wxCharBuffer buf(len);
  97     stream.Read(buf.data(), len);
  98     wxString str(buf, conv);
  99 #else
 100     wxString str;
 101     (void)conv;
 102     {
 103         wxStringBuffer buf(str, len);
 104         stream.Read(buf, len);
 105     }
 106 #endif
 107
 108     return str;
 109 }
 110
 111 // Decode a little endian wxUint32 number from a character array
 112 //
 113 static inline wxUint32 CrackUint32(const char *m)
 114 {
 115     const unsigned char *n = (const unsigned char*)m;
 116     return (n[3] << 24) | (n[2] << 16) | (n[1] << 8) | n[0];
 117 }
 118
 119 // Temporarily lower the logging level in debug mode to avoid a warning
 120 // from SeekI about seeking on a stream with data written back to it.
 121 //
 122 static wxFileOffset QuietSeek(wxInputStream& stream, wxFileOffset pos)
 123 {
 124 #ifdef __WXDEBUG__
 125     wxLogLevel level = wxLog::GetLogLevel();
 126     wxLog::SetLogLevel(wxLOG_Debug - 1);
 127     wxFileOffset result = stream.SeekI(pos);
 128     wxLog::SetLogLevel(level);
 129     return result;
 130 #else
 131     return stream.SeekI(pos);
 132 #endif
 133 }
 134
 135
 136 /////////////////////////////////////////////////////////////////////////////
 137 // Stored input stream
 138 // Trival decompressor for files which are 'stored' in the zip file.
 139
 140 class wxStoredInputStream : public wxFilterInputStream
 141 {
 142 public:
 143     wxStoredInputStream(wxInputStream& stream);
 144
 145     void Open(wxFileOffset len) { Close(); m_len = len; }
 146     void Close() { m_pos = 0; m_lasterror = wxSTREAM_NO_ERROR; }
 147
 148     virtual char Peek() { return wxInputStream::Peek(); }
 149     virtual wxFileOffset GetLength() const { return m_len; }
 150
 151 protected:
 152     virtual size_t OnSysRead(void *buffer, size_t size);
 153     virtual wxFileOffset OnSysTell() const { return m_pos; }
 154
 155 private:
 156     wxFileOffset m_pos;
 157     wxFileOffset m_len;
 158
 159     DECLARE_NO_COPY_CLASS(wxStoredInputStream)
 160 };
 161
 162 wxStoredInputStream::wxStoredInputStream(wxInputStream& stream)
 163   : wxFilterInputStream(stream),
 164     m_pos(0),
 165     m_len(0)
 166 {
 167 }
 168
 169 size_t wxStoredInputStream::OnSysRead(void *buffer, size_t size)
 170 {
 171     size_t count = wxMin(size, (size_t)(m_len - m_pos));
 172     count = m_parent_i_stream->Read(buffer, count).LastRead();
 173     m_pos += count;
 174
 175     if (m_pos == m_len)
 176         m_lasterror = wxSTREAM_EOF;
 177     else if (!*m_parent_i_stream)
 178         m_lasterror = wxSTREAM_READ_ERROR;
 179
 180     return count;
 181 }
 182
 183
 184 /////////////////////////////////////////////////////////////////////////////
 185 // Stored output stream
 186 // Trival compressor for files which are 'stored' in the zip file.
 187
 188 class wxStoredOutputStream : public wxFilterOutputStream
 189 {
 190 public:
 191     wxStoredOutputStream(wxOutputStream& stream) :
 192         wxFilterOutputStream(stream), m_pos(0) { }
 193
 194     bool Close() {
 195         m_pos = 0;
 196         m_lasterror = wxSTREAM_NO_ERROR;
 197         return true;
 198     }
 199
 200 protected:
 201     virtual size_t OnSysWrite(const void *buffer, size_t size);
 202     virtual wxFileOffset OnSysTell() const { return m_pos; }
 203
 204 private:
 205     wxFileOffset m_pos;
 206     DECLARE_NO_COPY_CLASS(wxStoredOutputStream)
 207 };
 208
 209 size_t wxStoredOutputStream::OnSysWrite(const void *buffer, size_t size)
 210 {
 211     if (!IsOk() || !size)
 212         return 0;
 213     size_t count = m_parent_o_stream->Write(buffer, size).LastWrite();
 214     if (count != size)
 215         m_lasterror = wxSTREAM_WRITE_ERROR;
 216     m_pos += count;
 217     return count;
 218 }
 219
 220
 221 /////////////////////////////////////////////////////////////////////////////
 222 // wxRawInputStream
 223 //
 224 // Used to handle the unusal case of raw copying an entry of unknown
 225 // length. This can only happen when the zip being copied from is being
 226 // read from a non-seekable stream, and also was original written to a
 227 // non-seekable stream.
 228 //
 229 // In this case there's no option but to decompress the stream to find
 230 // it's length, but we can still write the raw compressed data to avoid the
 231 // compression overhead (which is the greater one).
 232 //
 233 // Usage is like this:
 234 //  m_rawin = new wxRawInputStream(*m_parent_i_stream);
 235 //  m_decomp = m_rawin->Open(OpenDecompressor(m_rawin->GetTee()));
 236 //
 237 // The wxRawInputStream owns a wxTeeInputStream object, the role of which
 238 // is something like the unix 'tee' command; it is a transparent filter, but
 239 // allows the data read to be read a second time via an extra method 'GetData'.
 240 //
 241 // The wxRawInputStream then draws data through the tee using a decompressor
 242 // then instead of returning the decompressed data, retuns the raw data
 243 // from wxTeeInputStream::GetData().
 244
 245 class wxTeeInputStream : public wxFilterInputStream
 246 {
 247 public:
 248     wxTeeInputStream(wxInputStream& stream);
 249
 250     size_t GetCount() const { return m_end - m_start; }
 251     size_t GetData(char *buffer, size_t size);
 252
 253     void Open();
 254     bool Final();
 255
 256     wxInputStream& Read(void *buffer, size_t size);
 257
 258 protected:
 259     virtual size_t OnSysRead(void *buffer, size_t size);
 260     virtual wxFileOffset OnSysTell() const { return m_pos; }
 261
 262 private:
 263     wxFileOffset m_pos;
 264     wxMemoryBuffer m_buf;
 265     size_t m_start;
 266     size_t m_end;
 267
 268     DECLARE_NO_COPY_CLASS(wxTeeInputStream)
 269 };
 270
 271 wxTeeInputStream::wxTeeInputStream(wxInputStream& stream)
 272   : wxFilterInputStream(stream),
 273     m_pos(0), m_buf(8192), m_start(0), m_end(0)
 274 {
 275 }
 276
 277 void wxTeeInputStream::Open()
 278 {
 279     m_pos = m_start = m_end = 0;
 280     m_lasterror = wxSTREAM_NO_ERROR;
 281 }
 282
 283 bool wxTeeInputStream::Final()
 284 {
 285     bool final = m_end == m_buf.GetDataLen();
 286     m_end = m_buf.GetDataLen();
 287     return final;
 288 }
 289
 290 wxInputStream& wxTeeInputStream::Read(void *buffer, size_t size)
 291 {
 292     size_t count = wxInputStream::Read(buffer, size).LastRead();
 293     m_end = m_buf.GetDataLen();
 294     m_buf.AppendData(buffer, count);
 295     return *this;
 296 }
 297
 298 size_t wxTeeInputStream::OnSysRead(void *buffer, size_t size)
 299 {
 300     size_t count = m_parent_i_stream->Read(buffer, size).LastRead();
 301     m_lasterror = m_parent_i_stream->GetLastError();
 302     return count;
 303 }
 304
 305 size_t wxTeeInputStream::GetData(char *buffer, size_t size)
 306 {
 307     if (m_wbacksize) {
 308         size_t len = m_buf.GetDataLen();
 309         len = len > m_wbacksize ? len - m_wbacksize : 0;
 310         m_buf.SetDataLen(len);
 311         if (m_end > len) {
 312             wxFAIL; // we've already returned data that's now being ungot
 313             m_end = len;
 314         }
 315         m_parent_i_stream->Ungetch(m_wback, m_wbacksize);
 316         free(m_wback);
 317         m_wback = NULL;
 318         m_wbacksize = 0;
 319         m_wbackcur = 0;
 320     }
 321
 322     if (size > GetCount())
 323         size = GetCount();
 324     if (size) {
 325         memcpy(buffer, m_buf + m_start, size);
 326         m_start += size;
 327         wxASSERT(m_start <= m_end);
 328     }
 329
 330     if (m_start == m_end && m_start > 0 && m_buf.GetDataLen() > 0) {
 331         size_t len = m_buf.GetDataLen();
 332         char *buf = (char*)m_buf.GetWriteBuf(len);
 333         len -= m_end;
 334         memmove(buf, buf + m_end, len);
 335         m_buf.UngetWriteBuf(len);
 336         m_start = m_end = 0;
 337     }
 338
 339     return size;
 340 }
 341
 342 class wxRawInputStream : public wxFilterInputStream
 343 {
 344 public:
 345     wxRawInputStream(wxInputStream& stream);
 346     virtual ~wxRawInputStream() { delete m_tee; }
 347
 348     wxInputStream* Open(wxInputStream *decomp);
 349     wxInputStream& GetTee() const { return *m_tee; }
 350
 351 protected:
 352     virtual size_t OnSysRead(void *buffer, size_t size);
 353     virtual wxFileOffset OnSysTell() const { return m_pos; }
 354
 355 private:
 356     wxFileOffset m_pos;
 357     wxTeeInputStream *m_tee;
 358
 359     enum { BUFSIZE = 8192 };
 360     wxCharBuffer m_dummy;
 361
 362     DECLARE_NO_COPY_CLASS(wxRawInputStream)
 363 };
 364
 365 wxRawInputStream::wxRawInputStream(wxInputStream& stream)
 366   : wxFilterInputStream(stream),
 367     m_pos(0),
 368     m_tee(new wxTeeInputStream(stream)),
 369     m_dummy(BUFSIZE)
 370 {
 371 }
 372
 373 wxInputStream *wxRawInputStream::Open(wxInputStream *decomp)
 374 {
 375     if (decomp) {
 376         m_parent_i_stream = decomp;
 377         m_pos = 0;
 378         m_lasterror = wxSTREAM_NO_ERROR;
 379         m_tee->Open();
 380         return this;
 381     } else {
 382         return NULL;
 383     }
 384 }
 385
 386 size_t wxRawInputStream::OnSysRead(void *buffer, size_t size)
 387 {
 388     char *buf = (char*)buffer;
 389     size_t count = 0;
 390
 391     while (count < size && IsOk())
 392     {
 393         while (m_parent_i_stream->IsOk() && m_tee->GetCount() == 0)
 394             m_parent_i_stream->Read(m_dummy.data(), BUFSIZE);
 395
 396         size_t n = m_tee->GetData(buf + count, size - count);
 397         count += n;
 398
 399         if (n == 0 && m_tee->Final())
 400             m_lasterror = m_parent_i_stream->GetLastError();
 401     }
 402
 403     m_pos += count;
 404     return count;
 405 }
 406
 407
 408 /////////////////////////////////////////////////////////////////////////////
 409 // Zlib streams than can be reused without recreating.
 410
 411 class wxZlibOutputStream2 : public wxZlibOutputStream
 412 {
 413 public:
 414     wxZlibOutputStream2(wxOutputStream& stream, int level) :
 415         wxZlibOutputStream(stream, level, wxZLIB_NO_HEADER) { }
 416
 417     bool Open(wxOutputStream& stream);
 418     bool Close() { DoFlush(true); m_pos = wxInvalidOffset; return IsOk(); }
 419 };
 420
 421 bool wxZlibOutputStream2::Open(wxOutputStream& stream)
 422 {
 423     wxCHECK(m_pos == wxInvalidOffset, false);
 424
 425     m_deflate->next_out = m_z_buffer;
 426     m_deflate->avail_out = m_z_size;
 427     m_pos = 0;
 428     m_lasterror = wxSTREAM_NO_ERROR;
 429     m_parent_o_stream = &stream;
 430
 431     if (deflateReset(m_deflate) != Z_OK) {
 432         wxLogError(_("can't re-initialize zlib deflate stream"));
 433         m_lasterror = wxSTREAM_WRITE_ERROR;
 434         return false;
 435     }
 436
 437     return true;
 438 }
 439
 440 class wxZlibInputStream2 : public wxZlibInputStream
 441 {
 442 public:
 443     wxZlibInputStream2(wxInputStream& stream) :
 444         wxZlibInputStream(stream, wxZLIB_NO_HEADER) { }
 445
 446     bool Open(wxInputStream& stream);
 447 };
 448
 449 bool wxZlibInputStream2::Open(wxInputStream& stream)
 450 {
 451     m_inflate->avail_in = 0;
 452     m_pos = 0;
 453     m_lasterror = wxSTREAM_NO_ERROR;
 454     m_parent_i_stream = &stream;
 455
 456     if (inflateReset(m_inflate) != Z_OK) {
 457         wxLogError(_("can't re-initialize zlib inflate stream"));
 458         m_lasterror = wxSTREAM_READ_ERROR;
 459         return false;
 460     }
 461
 462     return true;
 463 }
 464
 465
 466 /////////////////////////////////////////////////////////////////////////////
 467 // Class to hold wxZipEntry's Extra and LocalExtra fields
 468
 469 class wxZipMemory
 470 {
 471 public:
 472     wxZipMemory() : m_data(NULL), m_size(0), m_capacity(0), m_ref(1) { }
 473     ~wxZipMemory() { delete m_data; }
 474
 475     wxZipMemory *AddRef() { m_ref++; return this; }
 476     void Release() { if (--m_ref == 0) delete this; }
 477
 478     char *GetData() const { return m_data; }
 479     size_t GetSize() const { return m_size; }
 480     size_t GetCapacity() const { return m_capacity; }
 481
 482     wxZipMemory *Unique(size_t size);
 483
 484 private:
 485
 486     char *m_data;
 487     size_t m_size;
 488     size_t m_capacity;
 489     int m_ref;
 490 };
 491
 492 wxZipMemory *wxZipMemory::Unique(size_t size)
 493 {
 494     wxZipMemory *zm;
 495
 496     if (m_ref > 1) {
 497         --m_ref;
 498         zm = new wxZipMemory;
 499     } else {
 500         zm = this;
 501     }
 502
 503     if (zm->m_capacity < size) {
 504         delete zm->m_data;
 505         zm->m_data = new char[size];
 506         zm->m_capacity = size;
 507     }
 508
 509     zm->m_size = size;
 510     return zm;
 511 }
 512
 513 static inline wxZipMemory *AddRef(wxZipMemory *zm)
 514 {
 515     if (zm)
 516         zm->AddRef();
 517     return zm;
 518 }
 519
 520 static inline void Release(wxZipMemory *zm)
 521 {
 522     if (zm)
 523         zm->Release();
 524 }
 525
 526 static void Copy(wxZipMemory*& dest, wxZipMemory *src)
 527 {
 528     Release(dest);
 529     dest = AddRef(src);
 530 }
 531
 532 static void Unique(wxZipMemory*& zm, size_t size)
 533 {
 534     if (!zm && size)
 535         zm = new wxZipMemory;
 536     if (zm)
 537         zm = zm->Unique(size);
 538 }
 539
 540
 541 /////////////////////////////////////////////////////////////////////////////
 542 // Collection of weak references to entries
 543
 544 WX_DECLARE_HASH_MAP(long, wxZipEntry*, wxIntegerHash,
 545                     wxIntegerEqual, _wxOffsetZipEntryMap);
 546
 547 class wxZipWeakLinks
 548 {
 549 public:
 550     wxZipWeakLinks() : m_ref(1) { }
 551     ~wxZipWeakLinks() { wxASSERT(IsEmpty()); }
 552
 553     void Release(const wxZipInputStream* WXUNUSED(x))
 554         { if (--m_ref == 0) delete this; }
 555     void Release(wxFileOffset key)
 556         { RemoveEntry(key); if (--m_ref == 0) delete this; }
 557
 558     wxZipWeakLinks *AddEntry(wxZipEntry *entry, wxFileOffset key);
 559     void RemoveEntry(wxFileOffset key)
 560         { m_entries.erase((_wxOffsetZipEntryMap::key_type)key); }
 561     wxZipEntry *GetEntry(wxFileOffset key) const;
 562     bool IsEmpty() const { return m_entries.empty(); }
 563
 564 private:
 565
 566     int m_ref;
 567     _wxOffsetZipEntryMap m_entries;
 568 };
 569
 570 wxZipWeakLinks *wxZipWeakLinks::AddEntry(wxZipEntry *entry, wxFileOffset key)
 571 {
 572     m_entries[(_wxOffsetZipEntryMap::key_type)key] = entry;
 573     m_ref++;
 574     return this;
 575 }
 576
 577 wxZipEntry *wxZipWeakLinks::GetEntry(wxFileOffset key) const
 578 {
 579     _wxOffsetZipEntryMap::const_iterator it =
 580         m_entries.find((_wxOffsetZipEntryMap::key_type)key);
 581     return it != m_entries.end() ?  it->second : NULL;
 582 }
 583
 584
 585 /////////////////////////////////////////////////////////////////////////////
 586 // ZipEntry
 587
 588 wxZipEntry::wxZipEntry(
 589     const wxString& name /*=wxEmptyString*/,
 590     const wxDateTime& dt /*=wxDateTime::Now()*/,
 591     wxFileOffset size    /*=wxInvalidOffset*/)
 592   :
 593     m_SystemMadeBy(wxZIP_SYSTEM_MSDOS),
 594     m_VersionMadeBy(wxMAJOR_VERSION * 10 + wxMINOR_VERSION),
 595     m_VersionNeeded(VERSION_NEEDED_TO_EXTRACT),
 596     m_Flags(0),
 597     m_Method(wxZIP_METHOD_DEFAULT),
 598     m_DateTime(dt),
 599     m_Crc(0),
 600     m_CompressedSize(wxInvalidOffset),
 601     m_Size(size),
 602     m_Key(wxInvalidOffset),
 603     m_Offset(wxInvalidOffset),
 604     m_DiskStart(0),
 605     m_InternalAttributes(0),
 606     m_ExternalAttributes(0),
 607     m_Extra(NULL),
 608     m_LocalExtra(NULL),
 609     m_zipnotifier(NULL),
 610     m_backlink(NULL)
 611 {
 612     if (!name.empty())
 613         SetName(name);
 614 }
 615
 616 wxZipEntry::~wxZipEntry()
 617 {
 618     if (m_backlink)
 619         m_backlink->Release(m_Key);
 620     Release(m_Extra);
 621     Release(m_LocalExtra);
 622 }
 623
 624 wxZipEntry::wxZipEntry(const wxZipEntry& e)
 625   : wxArchiveEntry(e),
 626     m_SystemMadeBy(e.m_SystemMadeBy),
 627     m_VersionMadeBy(e.m_VersionMadeBy),
 628     m_VersionNeeded(e.m_VersionNeeded),
 629     m_Flags(e.m_Flags),
 630     m_Method(e.m_Method),
 631     m_DateTime(e.m_DateTime),
 632     m_Crc(e.m_Crc),
 633     m_CompressedSize(e.m_CompressedSize),
 634     m_Size(e.m_Size),
 635     m_Name(e.m_Name),
 636     m_Key(e.m_Key),
 637     m_Offset(e.m_Offset),
 638     m_Comment(e.m_Comment),
 639     m_DiskStart(e.m_DiskStart),
 640     m_InternalAttributes(e.m_InternalAttributes),
 641     m_ExternalAttributes(e.m_ExternalAttributes),
 642     m_Extra(AddRef(e.m_Extra)),
 643     m_LocalExtra(AddRef(e.m_LocalExtra)),
 644     m_zipnotifier(NULL),
 645     m_backlink(NULL)
 646 {
 647 }
 648
 649 wxZipEntry& wxZipEntry::operator=(const wxZipEntry& e)
 650 {
 651     if (&e != this) {
 652         m_SystemMadeBy = e.m_SystemMadeBy;
 653         m_VersionMadeBy = e.m_VersionMadeBy;
 654         m_VersionNeeded = e.m_VersionNeeded;
 655         m_Flags = e.m_Flags;
 656         m_Method = e.m_Method;
 657         m_DateTime = e.m_DateTime;
 658         m_Crc = e.m_Crc;
 659         m_CompressedSize = e.m_CompressedSize;
 660         m_Size = e.m_Size;
 661         m_Name = e.m_Name;
 662         m_Key = e.m_Key;
 663         m_Offset = e.m_Offset;
 664         m_Comment = e.m_Comment;
 665         m_DiskStart = e.m_DiskStart;
 666         m_InternalAttributes = e.m_InternalAttributes;
 667         m_ExternalAttributes = e.m_ExternalAttributes;
 668         Copy(m_Extra, e.m_Extra);
 669         Copy(m_LocalExtra, e.m_LocalExtra);
 670         m_zipnotifier = NULL;
 671         if (m_backlink) {
 672             m_backlink->Release(m_Key);
 673             m_backlink = NULL;
 674         }
 675     }
 676     return *this;
 677 }
 678
 679 wxString wxZipEntry::GetName(wxPathFormat format /*=wxPATH_NATIVE*/) const
 680 {
 681     bool isDir = IsDir() && !m_Name.empty();
 682
 683     switch (wxFileName::GetFormat(format)) {
 684         case wxPATH_DOS:
 685         {
 686             wxString name(isDir ? m_Name + _T("\\") : m_Name);
 687             for (size_t i = name.length() - 1; i > 0; --i)
 688                 if (name[i] == _T('/'))
 689                     name[i] = _T('\\');
 690             return name;
 691         }
 692
 693         case wxPATH_UNIX:
 694             return isDir ? m_Name + _T("/") : m_Name;
 695
 696         default:
 697             ;
 698     }
 699
 700     wxFileName fn;
 701
 702     if (isDir)
 703         fn.AssignDir(m_Name, wxPATH_UNIX);
 704     else
 705         fn.Assign(m_Name, wxPATH_UNIX);
 706
 707     return fn.GetFullPath(format);
 708 }
 709
 710 // Static - Internally tars and zips use forward slashes for the path
 711 // separator, absolute paths aren't allowed, and directory names have a
 712 // trailing slash.  This function converts a path into this internal format,
 713 // but without a trailing slash for a directory.
 714 //
 715 wxString wxZipEntry::GetInternalName(const wxString& name,
 716                                      wxPathFormat format /*=wxPATH_NATIVE*/,
 717                                      bool *pIsDir        /*=NULL*/)
 718 {
 719     wxString internal;
 720
 721     if (wxFileName::GetFormat(format) != wxPATH_UNIX)
 722         internal = wxFileName(name, format).GetFullPath(wxPATH_UNIX);
 723     else
 724         internal = name;
 725
 726     bool isDir = !internal.empty() && internal.Last() == '/';
 727     if (pIsDir)
 728         *pIsDir = isDir;
 729     if (isDir)
 730         internal.erase(internal.length() - 1);
 731
 732     while (!internal.empty() && *internal.begin() == '/')
 733         internal.erase(0, 1);
 734     while (!internal.empty() && internal.compare(0, 2, _T("./")) == 0)
 735         internal.erase(0, 2);
 736     if (internal == _T(".") || internal == _T(".."))
 737         internal = wxEmptyString;
 738
 739     return internal;
 740 }
 741
 742 void wxZipEntry::SetSystemMadeBy(int system)
 743 {
 744     int mode = GetMode();
 745     bool wasUnix = IsMadeByUnix();
 746
 747     m_SystemMadeBy = (wxUint8)system;
 748
 749     if (!wasUnix && IsMadeByUnix()) {
 750         SetIsDir(IsDir());
 751         SetMode(mode);
 752     } else if (wasUnix && !IsMadeByUnix()) {
 753         m_ExternalAttributes &= 0xffff;
 754     }
 755 }
 756
 757 void wxZipEntry::SetIsDir(bool isDir /*=true*/)
 758 {
 759     if (isDir)
 760         m_ExternalAttributes |= wxZIP_A_SUBDIR;
 761     else
 762         m_ExternalAttributes &= ~wxZIP_A_SUBDIR;
 763
 764     if (IsMadeByUnix()) {
 765         m_ExternalAttributes &= ~wxZIP_S_IFMT;
 766         if (isDir)
 767             m_ExternalAttributes |= wxZIP_S_IFDIR;
 768         else
 769             m_ExternalAttributes |= wxZIP_S_IFREG;
 770     }
 771 }
 772
 773 // Return unix style permission bits
 774 //
 775 int wxZipEntry::GetMode() const
 776 {
 777     // return unix permissions if present
 778     if (IsMadeByUnix())
 779         return (m_ExternalAttributes >> 16) & 0777;
 780
 781     // otherwise synthesize from the dos attribs
 782     int mode = 0644;
 783     if (m_ExternalAttributes & wxZIP_A_RDONLY)
 784         mode &= ~0200;
 785     if (m_ExternalAttributes & wxZIP_A_SUBDIR)
 786         mode |= 0111;
 787
 788     return mode;
 789 }
 790
 791 // Set unix permissions
 792 //
 793 void wxZipEntry::SetMode(int mode)
 794 {
 795     // Set dos attrib bits to be compatible
 796     if (mode & 0222)
 797         m_ExternalAttributes &= ~wxZIP_A_RDONLY;
 798     else
 799         m_ExternalAttributes |= wxZIP_A_RDONLY;
 800
 801     // set the actual unix permission bits if the system type allows
 802     if (IsMadeByUnix()) {
 803         m_ExternalAttributes &= ~(0777L << 16);
 804         m_ExternalAttributes |= (mode & 0777L) << 16;
 805     }
 806 }
 807
 808 const char *wxZipEntry::GetExtra() const
 809 {
 810     return m_Extra ? m_Extra->GetData() : NULL;
 811 }
 812
 813 size_t wxZipEntry::GetExtraLen() const
 814 {
 815     return m_Extra ? m_Extra->GetSize() : 0;
 816 }
 817
 818 void wxZipEntry::SetExtra(const char *extra, size_t len)
 819 {
 820     Unique(m_Extra, len);
 821     if (len)
 822         memcpy(m_Extra->GetData(), extra, len);
 823 }
 824
 825 const char *wxZipEntry::GetLocalExtra() const
 826 {
 827     return m_LocalExtra ? m_LocalExtra->GetData() : NULL;
 828 }
 829
 830 size_t  wxZipEntry::GetLocalExtraLen() const
 831 {
 832     return m_LocalExtra ? m_LocalExtra->GetSize() : 0;
 833 }
 834
 835 void wxZipEntry::SetLocalExtra(const char *extra, size_t len)
 836 {
 837     Unique(m_LocalExtra, len);
 838     if (len)
 839         memcpy(m_LocalExtra->GetData(), extra, len);
 840 }
 841
 842 void wxZipEntry::SetNotifier(wxZipNotifier& notifier)
 843 {
 844     wxArchiveEntry::UnsetNotifier();
 845     m_zipnotifier = &notifier;
 846     m_zipnotifier->OnEntryUpdated(*this);
 847 }
 848
 849 void wxZipEntry::Notify()
 850 {
 851     if (m_zipnotifier)
 852         m_zipnotifier->OnEntryUpdated(*this);
 853     else if (GetNotifier())
 854         GetNotifier()->OnEntryUpdated(*this);
 855 }
 856
 857 void wxZipEntry::UnsetNotifier()
 858 {
 859     wxArchiveEntry::UnsetNotifier();
 860     m_zipnotifier = NULL;
 861 }
 862
 863 size_t wxZipEntry::ReadLocal(wxInputStream& stream, wxMBConv& conv)
 864 {
 865     wxUint16 nameLen, extraLen;
 866     wxUint32 compressedSize, size, crc;
 867
 868     wxDataInputStream ds(stream);
 869
 870     ds >> m_VersionNeeded >> m_Flags >> m_Method;
 871     SetDateTime(wxDateTime().SetFromDOS(ds.Read32()));
 872     ds >> crc >> compressedSize >> size >> nameLen >> extraLen;
 873
 874     bool sumsValid = (m_Flags & wxZIP_SUMS_FOLLOW) == 0;
 875
 876     if (sumsValid || crc)
 877         m_Crc = crc;
 878     if ((sumsValid || compressedSize) || m_Method == wxZIP_METHOD_STORE)
 879         m_CompressedSize = compressedSize;
 880     if ((sumsValid || size) || m_Method == wxZIP_METHOD_STORE)
 881         m_Size = size;
 882
 883     SetName(ReadString(stream, nameLen, conv), wxPATH_UNIX);
 884
 885     if (extraLen || GetLocalExtraLen()) {
 886         Unique(m_LocalExtra, extraLen);
 887         if (extraLen)
 888             stream.Read(m_LocalExtra->GetData(), extraLen);
 889     }
 890
 891     return LOCAL_SIZE + nameLen + extraLen;
 892 }
 893
 894 size_t wxZipEntry::WriteLocal(wxOutputStream& stream, wxMBConv& conv) const
 895 {
 896     wxString unixName = GetName(wxPATH_UNIX);
 897     const wxWX2MBbuf name_buf = conv.cWX2MB(unixName);
 898     const char *name = name_buf;
 899     if (!name) name = "";
 900     wxUint16 nameLen = (wxUint16)strlen(name);
 901
 902     wxDataOutputStream ds(stream);
 903
 904     ds << m_VersionNeeded << m_Flags << m_Method;
 905     ds.Write32(GetDateTime().GetAsDOS());
 906
 907     ds.Write32(m_Crc);
 908     ds.Write32(m_CompressedSize != wxInvalidOffset ? (wxUint32)m_CompressedSize : 0);
 909     ds.Write32(m_Size != wxInvalidOffset ? (wxUint32)m_Size : 0);
 910
 911     ds << nameLen;
 912     wxUint16 extraLen = (wxUint16)GetLocalExtraLen();
 913     ds.Write16(extraLen);
 914
 915     stream.Write(name, nameLen);
 916     if (extraLen)
 917         stream.Write(m_LocalExtra->GetData(), extraLen);
 918
 919     return LOCAL_SIZE + nameLen + extraLen;
 920 }
 921
 922 size_t wxZipEntry::ReadCentral(wxInputStream& stream, wxMBConv& conv)
 923 {
 924     wxUint16 nameLen, extraLen, commentLen;
 925
 926     wxDataInputStream ds(stream);
 927
 928     ds >> m_VersionMadeBy >> m_SystemMadeBy;
 929
 930     SetVersionNeeded(ds.Read16());
 931     SetFlags(ds.Read16());
 932     SetMethod(ds.Read16());
 933     SetDateTime(wxDateTime().SetFromDOS(ds.Read32()));
 934     SetCrc(ds.Read32());
 935     SetCompressedSize(ds.Read32());
 936     SetSize(ds.Read32());
 937
 938     ds >> nameLen >> extraLen >> commentLen
 939        >> m_DiskStart >> m_InternalAttributes >> m_ExternalAttributes;
 940     SetOffset(ds.Read32());
 941
 942     SetName(ReadString(stream, nameLen, conv), wxPATH_UNIX);
 943
 944     if (extraLen || GetExtraLen()) {
 945         Unique(m_Extra, extraLen);
 946         if (extraLen)
 947             stream.Read(m_Extra->GetData(), extraLen);
 948     }
 949
 950     if (commentLen)
 951         m_Comment = ReadString(stream, commentLen, conv);
 952     else
 953         m_Comment.clear();
 954
 955     return CENTRAL_SIZE + nameLen + extraLen + commentLen;
 956 }
 957
 958 size_t wxZipEntry::WriteCentral(wxOutputStream& stream, wxMBConv& conv) const
 959 {
 960     wxString unixName = GetName(wxPATH_UNIX);
 961     const wxWX2MBbuf name_buf = conv.cWX2MB(unixName);
 962     const char *name = name_buf;
 963     if (!name) name = "";
 964     wxUint16 nameLen = (wxUint16)strlen(name);
 965
 966     const wxWX2MBbuf comment_buf = conv.cWX2MB(m_Comment);
 967     const char *comment = comment_buf;
 968     if (!comment) comment = "";
 969     wxUint16 commentLen = (wxUint16)strlen(comment);
 970
 971     wxUint16 extraLen = (wxUint16)GetExtraLen();
 972
 973     wxDataOutputStream ds(stream);
 974
 975     ds << CENTRAL_MAGIC << m_VersionMadeBy << m_SystemMadeBy;
 976
 977     ds.Write16((wxUint16)GetVersionNeeded());
 978     ds.Write16((wxUint16)GetFlags());
 979     ds.Write16((wxUint16)GetMethod());
 980     ds.Write32(GetDateTime().GetAsDOS());
 981     ds.Write32(GetCrc());
 982     ds.Write32((wxUint32)GetCompressedSize());
 983     ds.Write32((wxUint32)GetSize());
 984     ds.Write16(nameLen);
 985     ds.Write16(extraLen);
 986
 987     ds << commentLen << m_DiskStart << m_InternalAttributes
 988        << m_ExternalAttributes << (wxUint32)GetOffset();
 989
 990     stream.Write(name, nameLen);
 991     if (extraLen)
 992         stream.Write(GetExtra(), extraLen);
 993     stream.Write(comment, commentLen);
 994
 995     return CENTRAL_SIZE + nameLen + extraLen + commentLen;
 996 }
 997
 998 // Info-zip prefixes this record with a signature, but pkzip doesn't. So if
 999 // the 1st value is the signature then it is probably an info-zip record,
1000 // though there is a small chance that it is in fact a pkzip record which
1001 // happens to have the signature as it's CRC.
1002 //
1003 size_t wxZipEntry::ReadDescriptor(wxInputStream& stream)
1004 {
1005     wxDataInputStream ds(stream);
1006
1007     m_Crc = ds.Read32();
1008     m_CompressedSize = ds.Read32();
1009     m_Size = ds.Read32();
1010
1011     // if 1st value is the signature then this is probably an info-zip record
1012     if (m_Crc == SUMS_MAGIC)
1013     {
1014         char buf[8];
1015         stream.Read(buf, sizeof(buf));
1016         wxUint32 u1 = CrackUint32(buf);
1017         wxUint32 u2 = CrackUint32(buf + 4);
1018
1019         // look for the signature of the following record to decide which
1020         if ((u1 == LOCAL_MAGIC || u1 == CENTRAL_MAGIC) &&
1021             (u2 != LOCAL_MAGIC && u2 != CENTRAL_MAGIC))
1022         {
1023             // it's a pkzip style record after all!
1024             stream.Ungetch(buf, sizeof(buf));
1025         }
1026         else
1027         {
1028             // it's an info-zip record as expected
1029             stream.Ungetch(buf + 4, sizeof(buf) - 4);
1030             m_Crc = (wxUint32)m_CompressedSize;
1031             m_CompressedSize = m_Size;
1032             m_Size = u1;
1033             return SUMS_SIZE + 4;
1034         }
1035     }
1036
1037     return SUMS_SIZE;
1038 }
1039
1040 size_t wxZipEntry::WriteDescriptor(wxOutputStream& stream, wxUint32 crc,
1041                                    wxFileOffset compressedSize, wxFileOffset size)
1042 {
1043     m_Crc = crc;
1044     m_CompressedSize = compressedSize;
1045     m_Size = size;
1046
1047     wxDataOutputStream ds(stream);
1048
1049     ds.Write32(crc);
1050     ds.Write32((wxUint32)compressedSize);
1051     ds.Write32((wxUint32)size);
1052
1053     return SUMS_SIZE;
1054 }
1055
1056
1057 /////////////////////////////////////////////////////////////////////////////
1058 // wxZipEndRec - holds the end of central directory record
1059
1060 class wxZipEndRec
1061 {
1062 public:
1063     wxZipEndRec();
1064
1065     int GetDiskNumber() const                   { return m_DiskNumber; }
1066     int GetStartDisk() const                    { return m_StartDisk; }
1067     int GetEntriesHere() const                  { return m_EntriesHere; }
1068     int GetTotalEntries() const                 { return m_TotalEntries; }
1069     wxFileOffset GetSize() const                { return m_Size; }
1070     wxFileOffset GetOffset() const              { return m_Offset; }
1071     wxString GetComment() const                 { return m_Comment; }
1072
1073     void SetDiskNumber(int num)                 { m_DiskNumber = (wxUint16)num; }
1074     void SetStartDisk(int num)                  { m_StartDisk = (wxUint16)num; }
1075     void SetEntriesHere(int num)                { m_EntriesHere = (wxUint16)num; }
1076     void SetTotalEntries(int num)               { m_TotalEntries = (wxUint16)num; }
1077     void SetSize(wxFileOffset size)             { m_Size = (wxUint32)size; }
1078     void SetOffset(wxFileOffset offset)         { m_Offset = (wxUint32)offset; }
1079     void SetComment(const wxString& comment)    { m_Comment = comment; }
1080
1081     bool Read(wxInputStream& stream, wxMBConv& conv);
1082     bool Write(wxOutputStream& stream, wxMBConv& conv) const;
1083
1084 private:
1085     wxUint16 m_DiskNumber;
1086     wxUint16 m_StartDisk;
1087     wxUint16 m_EntriesHere;
1088     wxUint16 m_TotalEntries;
1089     wxUint32 m_Size;
1090     wxUint32 m_Offset;
1091     wxString m_Comment;
1092 };
1093
1094 wxZipEndRec::wxZipEndRec()
1095   : m_DiskNumber(0),
1096     m_StartDisk(0),
1097     m_EntriesHere(0),
1098     m_TotalEntries(0),
1099     m_Size(0),
1100     m_Offset(0)
1101 {
1102 }
1103
1104 bool wxZipEndRec::Write(wxOutputStream& stream, wxMBConv& conv) const
1105 {
1106     const wxWX2MBbuf comment_buf = conv.cWX2MB(m_Comment);
1107     const char *comment = comment_buf;
1108     if (!comment) comment = "";
1109     wxUint16 commentLen = (wxUint16)strlen(comment);
1110
1111     wxDataOutputStream ds(stream);
1112
1113     ds << END_MAGIC << m_DiskNumber << m_StartDisk << m_EntriesHere
1114        << m_TotalEntries << m_Size << m_Offset << commentLen;
1115
1116     stream.Write(comment, commentLen);
1117
1118     return stream.IsOk();
1119 }
1120
1121 bool wxZipEndRec::Read(wxInputStream& stream, wxMBConv& conv)
1122 {
1123     wxDataInputStream ds(stream);
1124     wxUint16 commentLen;
1125
1126     ds >> m_DiskNumber >> m_StartDisk >> m_EntriesHere
1127        >> m_TotalEntries >> m_Size >> m_Offset >> commentLen;
1128
1129     if (commentLen)
1130         m_Comment = ReadString(stream, commentLen, conv);
1131
1132     if (stream.IsOk())
1133         if (m_DiskNumber == 0 && m_StartDisk == 0 &&
1134                 m_EntriesHere == m_TotalEntries)
1135             return true;
1136         else
1137             wxLogError(_("unsupported zip archive"));
1138
1139     return false;
1140 }
1141
1142
1143 /////////////////////////////////////////////////////////////////////////////
1144 // A weak link from an input stream to an output stream
1145
1146 class wxZipStreamLink
1147 {
1148 public:
1149     wxZipStreamLink(wxZipOutputStream *stream) : m_ref(1), m_stream(stream) { }
1150     ~wxZipStreamLink() { }
1151
1152     wxZipStreamLink *AddRef() { m_ref++; return this; }
1153     wxZipOutputStream *GetOutputStream() const { return m_stream; }
1154
1155     void Release(class wxZipInputStream *WXUNUSED(s))
1156         { if (--m_ref == 0) delete this; }
1157     void Release(class wxZipOutputStream *WXUNUSED(s))
1158         { m_stream = NULL; if (--m_ref == 0) delete this; }
1159
1160 private:
1161
1162     int m_ref;
1163     wxZipOutputStream *m_stream;
1164 };
1165
1166
1167 /////////////////////////////////////////////////////////////////////////////
1168 // Input stream
1169
1170 wxDECLARE_SCOPED_PTR(wxZipEntry, _wxZipEntryPtr)
1171 wxDEFINE_SCOPED_PTR (wxZipEntry, _wxZipEntryPtr)
1172
1173 // constructor
1174 //
1175 wxZipInputStream::wxZipInputStream(wxInputStream& stream,
1176                                    wxMBConv& conv /*=wxConvLocal*/)
1177   : wxArchiveInputStream(stream, conv)
1178 {
1179     m_ffile = NULL;
1180     Init();
1181 }
1182
1183 // Compatibility constructor
1184 //
1185 wxZipInputStream::wxZipInputStream(const wxString& archive,
1186                                    const wxString& file)
1187   : wxArchiveInputStream(OpenFile(archive), wxConvLocal)
1188 {
1189     // no error messages
1190     wxLogNull nolog;
1191     Init();
1192     _wxZipEntryPtr entry;
1193
1194     if (m_ffile->Ok()) {
1195         do {
1196             entry.reset(GetNextEntry());
1197         }
1198         while (entry.get() != NULL && entry->GetInternalName() != file);
1199     }
1200
1201     if (entry.get() == NULL)
1202         m_lasterror = wxSTREAM_READ_ERROR;
1203 }
1204
1205 wxInputStream& wxZipInputStream::OpenFile(const wxString& archive)
1206 {
1207     wxLogNull nolog;
1208     m_ffile = new wxFFileInputStream(archive);
1209     return *m_ffile;
1210 }
1211
1212 void wxZipInputStream::Init()
1213 {
1214     m_store = new wxStoredInputStream(*m_parent_i_stream);
1215     m_inflate = NULL;
1216     m_rawin = NULL;
1217     m_raw = false;
1218     m_headerSize = 0;
1219     m_decomp = NULL;
1220     m_parentSeekable = false;
1221     m_weaklinks = new wxZipWeakLinks;
1222     m_streamlink = NULL;
1223     m_offsetAdjustment = 0;
1224     m_position = wxInvalidOffset;
1225     m_signature = 0;
1226     m_TotalEntries = 0;
1227     m_lasterror = m_parent_i_stream->GetLastError();
1228 }
1229
1230 wxZipInputStream::~wxZipInputStream()
1231 {
1232     CloseDecompressor(m_decomp);
1233
1234     delete m_store;
1235     delete m_inflate;
1236     delete m_rawin;
1237     delete m_ffile;
1238
1239     m_weaklinks->Release(this);
1240
1241     if (m_streamlink)
1242         m_streamlink->Release(this);
1243 }
1244
1245 wxString wxZipInputStream::GetComment()
1246 {
1247     if (m_position == wxInvalidOffset)
1248         if (!LoadEndRecord())
1249             return wxEmptyString;
1250
1251     if (!m_parentSeekable && Eof() && m_signature) {
1252         m_lasterror = wxSTREAM_NO_ERROR;
1253         m_lasterror = ReadLocal(true);
1254     }
1255
1256     return m_Comment;
1257 }
1258
1259 int wxZipInputStream::GetTotalEntries()
1260 {
1261     if (m_position == wxInvalidOffset)
1262         LoadEndRecord();
1263     return m_TotalEntries;
1264 }
1265
1266 wxZipStreamLink *wxZipInputStream::MakeLink(wxZipOutputStream *out)
1267 {
1268     wxZipStreamLink *link = NULL;
1269
1270     if (!m_parentSeekable && (IsOpened() || !Eof())) {
1271         link = new wxZipStreamLink(out);
1272         if (m_streamlink)
1273             m_streamlink->Release(this);
1274         m_streamlink = link->AddRef();
1275     }
1276
1277     return link;
1278 }
1279
1280 bool wxZipInputStream::LoadEndRecord()
1281 {
1282     wxCHECK(m_position == wxInvalidOffset, false);
1283     if (!IsOk())
1284         return false;
1285
1286     m_position = 0;
1287
1288     // First find the end-of-central-directory record.
1289     if (!FindEndRecord()) {
1290         // failed, so either this is a non-seekable stream (ok), or not a zip
1291         if (m_parentSeekable) {
1292             m_lasterror = wxSTREAM_READ_ERROR;
1293             wxLogError(_("invalid zip file"));
1294             return false;
1295         }
1296         else {
1297             wxLogNull nolog;
1298             wxFileOffset pos = m_parent_i_stream->TellI();
1299             // FIXME
1300             //if (pos != wxInvalidOffset)
1301             if (pos >= 0 && pos <= LONG_MAX)
1302                 m_offsetAdjustment = m_position = pos;
1303             return true;
1304         }
1305     }
1306
1307     wxZipEndRec endrec;
1308
1309     // Read in the end record
1310     wxFileOffset endPos = m_parent_i_stream->TellI() - 4;
1311     if (!endrec.Read(*m_parent_i_stream, GetConv())) {
1312         if (!*m_parent_i_stream) {
1313             m_lasterror = wxSTREAM_READ_ERROR;
1314             return false;
1315         }
1316         // TODO: try this out
1317         wxLogWarning(_("assuming this is a multi-part zip concatenated"));
1318     }
1319
1320     m_TotalEntries = endrec.GetTotalEntries();
1321     m_Comment = endrec.GetComment();
1322
1323     // Now find the central-directory. we have the file offset of
1324     // the CD, so look there first.
1325     if (m_parent_i_stream->SeekI(endrec.GetOffset()) != wxInvalidOffset &&
1326             ReadSignature() == CENTRAL_MAGIC) {
1327         m_signature = CENTRAL_MAGIC;
1328         m_position = endrec.GetOffset();
1329         m_offsetAdjustment = 0;
1330         return true;
1331     }
1332
1333     // If it's not there, then it could be that the zip has been appended
1334     // to a self extractor, so take the CD size (also in endrec), subtract
1335     // it from the file offset of the end-central-directory and look there.
1336     if (m_parent_i_stream->SeekI(endPos - endrec.GetSize())
1337             != wxInvalidOffset && ReadSignature() == CENTRAL_MAGIC) {
1338         m_signature = CENTRAL_MAGIC;
1339         m_position = endPos - endrec.GetSize();
1340         m_offsetAdjustment = m_position - endrec.GetOffset();
1341         return true;
1342     }
1343
1344     wxLogError(_("can't find central directory in zip"));
1345     m_lasterror = wxSTREAM_READ_ERROR;
1346     return false;
1347 }
1348
1349 // Find the end-of-central-directory record.
1350 // If found the stream will be positioned just past the 4 signature bytes.
1351 //
1352 bool wxZipInputStream::FindEndRecord()
1353 {
1354     // usually it's 22 bytes in size and the last thing in the file
1355     {
1356         wxLogNull nolog;
1357         if (m_parent_i_stream->SeekI(-END_SIZE, wxFromEnd) == wxInvalidOffset)
1358             return false;
1359     }
1360
1361     m_parentSeekable = true;
1362     m_signature = 0;
1363     char magic[4];
1364     if (m_parent_i_stream->Read(magic, 4).LastRead() != 4)
1365         return false;
1366     if ((m_signature = CrackUint32(magic)) == END_MAGIC)
1367         return true;
1368
1369     // unfortunately, the record has a comment field that can be up to 65535
1370     // bytes in length, so if the signature not found then search backwards.
1371     wxFileOffset pos = m_parent_i_stream->TellI();
1372     const int BUFSIZE = 1024;
1373     wxCharBuffer buf(BUFSIZE);
1374
1375     memcpy(buf.data(), magic, 3);
1376     wxFileOffset minpos = wxMax(pos - 65535L, 0);
1377
1378     while (pos > minpos) {
1379         size_t len = (size_t)(pos - wxMax(pos - (BUFSIZE - 3), minpos));
1380         memcpy(buf.data() + len, buf, 3);
1381         pos -= len;
1382
1383         if (m_parent_i_stream->SeekI(pos, wxFromStart) == wxInvalidOffset ||
1384                 m_parent_i_stream->Read(buf.data(), len).LastRead() != len)
1385             return false;
1386
1387         char *p = buf.data() + len;
1388
1389         while (p-- > buf.data()) {
1390             if ((m_signature = CrackUint32(p)) == END_MAGIC) {
1391                 size_t remainder = buf.data() + len - p;
1392                 if (remainder > 4)
1393                     m_parent_i_stream->Ungetch(p + 4, remainder - 4);
1394                 return true;
1395             }
1396         }
1397     }
1398
1399     return false;
1400 }
1401
1402 wxZipEntry *wxZipInputStream::GetNextEntry()
1403 {
1404     if (m_position == wxInvalidOffset)
1405         if (!LoadEndRecord())
1406             return NULL;
1407
1408     m_lasterror = m_parentSeekable ? ReadCentral() : ReadLocal();
1409     if (!IsOk())
1410         return NULL;
1411
1412     _wxZipEntryPtr entry(new wxZipEntry(m_entry));
1413     entry->m_backlink = m_weaklinks->AddEntry(entry.get(), entry->GetKey());
1414     return entry.release();
1415 }
1416
1417 wxStreamError wxZipInputStream::ReadCentral()
1418 {
1419     if (!AtHeader())
1420         CloseEntry();
1421
1422     if (m_signature == END_MAGIC)
1423         return wxSTREAM_EOF;
1424
1425     if (m_signature != CENTRAL_MAGIC) {
1426         wxLogError(_("error reading zip central directory"));
1427         return wxSTREAM_READ_ERROR;
1428     }
1429
1430     if (QuietSeek(*m_parent_i_stream, m_position + 4) == wxInvalidOffset)
1431         return wxSTREAM_READ_ERROR;
1432
1433     m_position += m_entry.ReadCentral(*m_parent_i_stream, GetConv());
1434     if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR) {
1435         m_signature = 0;
1436         return wxSTREAM_READ_ERROR;
1437     }
1438
1439     m_signature = ReadSignature();
1440
1441     if (m_offsetAdjustment)
1442         m_entry.SetOffset(m_entry.GetOffset() + m_offsetAdjustment);
1443     m_entry.SetKey(m_entry.GetOffset());
1444
1445     return wxSTREAM_NO_ERROR;
1446 }
1447
1448 wxStreamError wxZipInputStream::ReadLocal(bool readEndRec /*=false*/)
1449 {
1450     if (!AtHeader())
1451         CloseEntry();
1452
1453     if (!m_signature)
1454         m_signature = ReadSignature();
1455
1456     if (m_signature == CENTRAL_MAGIC || m_signature == END_MAGIC) {
1457         if (m_streamlink && !m_streamlink->GetOutputStream()) {
1458             m_streamlink->Release(this);
1459             m_streamlink = NULL;
1460         }
1461     }
1462
1463     while (m_signature == CENTRAL_MAGIC) {
1464         if (m_weaklinks->IsEmpty() && m_streamlink == NULL)
1465             return wxSTREAM_EOF;
1466
1467         m_position += m_entry.ReadCentral(*m_parent_i_stream, GetConv());
1468         m_signature = 0;
1469         if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR)
1470             return wxSTREAM_READ_ERROR;
1471
1472         wxZipEntry *entry = m_weaklinks->GetEntry(m_entry.GetOffset());
1473         if (entry) {
1474             entry->SetSystemMadeBy(m_entry.GetSystemMadeBy());
1475             entry->SetVersionMadeBy(m_entry.GetVersionMadeBy());
1476             entry->SetComment(m_entry.GetComment());
1477             entry->SetDiskStart(m_entry.GetDiskStart());
1478             entry->SetInternalAttributes(m_entry.GetInternalAttributes());
1479             entry->SetExternalAttributes(m_entry.GetExternalAttributes());
1480             Copy(entry->m_Extra, m_entry.m_Extra);
1481             entry->Notify();
1482             m_weaklinks->RemoveEntry(entry->GetOffset());
1483         }
1484
1485         m_signature = ReadSignature();
1486     }
1487
1488     if (m_signature == END_MAGIC) {
1489         if (readEndRec || m_streamlink) {
1490             wxZipEndRec endrec;
1491             endrec.Read(*m_parent_i_stream, GetConv());
1492             m_Comment = endrec.GetComment();
1493             m_signature = 0;
1494             if (m_streamlink) {
1495                 m_streamlink->GetOutputStream()->SetComment(endrec.GetComment());
1496                 m_streamlink->Release(this);
1497                 m_streamlink = NULL;
1498             }
1499         }
1500         return wxSTREAM_EOF;
1501     }
1502
1503     if (m_signature != LOCAL_MAGIC) {
1504         wxLogError(_("error reading zip local header"));
1505         return wxSTREAM_READ_ERROR;
1506     }
1507
1508     m_headerSize = m_entry.ReadLocal(*m_parent_i_stream, GetConv());
1509     m_signature = 0;
1510     m_entry.SetOffset(m_position);
1511     m_entry.SetKey(m_position);
1512
1513     if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR) {
1514         return wxSTREAM_READ_ERROR;
1515     } else {
1516         m_TotalEntries++;
1517         return wxSTREAM_NO_ERROR;
1518     }
1519 }
1520
1521 wxUint32 wxZipInputStream::ReadSignature()
1522 {
1523     char magic[4];
1524     m_parent_i_stream->Read(magic, 4);
1525     return m_parent_i_stream->LastRead() == 4 ? CrackUint32(magic) : 0;
1526 }
1527
1528 bool wxZipInputStream::OpenEntry(wxArchiveEntry& entry)
1529 {
1530     wxZipEntry *zipEntry = wxStaticCast(&entry, wxZipEntry);
1531     return zipEntry ? OpenEntry(*zipEntry) : false;
1532 }
1533
1534 // Open an entry
1535 //
1536 bool wxZipInputStream::DoOpen(wxZipEntry *entry, bool raw)
1537 {
1538     if (m_position == wxInvalidOffset)
1539         if (!LoadEndRecord())
1540             return false;
1541     if (m_lasterror == wxSTREAM_READ_ERROR)
1542         return false;
1543     wxCHECK(!IsOpened(), false);
1544
1545     m_raw = raw;
1546
1547     if (entry) {
1548         if (AfterHeader() && entry->GetKey() == m_entry.GetOffset())
1549             return true;
1550         // can only open the current entry on a non-seekable stream
1551         wxCHECK(m_parentSeekable, false);
1552     }
1553
1554     m_lasterror = wxSTREAM_READ_ERROR;
1555
1556     if (entry)
1557         m_entry = *entry;
1558
1559     if (m_parentSeekable) {
1560         if (QuietSeek(*m_parent_i_stream, m_entry.GetOffset())
1561                 == wxInvalidOffset)
1562             return false;
1563         if (ReadSignature() != LOCAL_MAGIC) {
1564             wxLogError(_("bad zipfile offset to entry"));
1565             return false;
1566         }
1567     }
1568
1569     if (m_parentSeekable || AtHeader()) {
1570         m_headerSize = m_entry.ReadLocal(*m_parent_i_stream, GetConv());
1571         if (m_parentSeekable) {
1572             wxZipEntry *ref = m_weaklinks->GetEntry(m_entry.GetKey());
1573             if (ref) {
1574                 Copy(ref->m_LocalExtra, m_entry.m_LocalExtra);
1575                 ref->Notify();
1576                 m_weaklinks->RemoveEntry(ref->GetKey());
1577             }
1578             if (entry && entry != ref) {
1579                 Copy(entry->m_LocalExtra, m_entry.m_LocalExtra);
1580                 entry->Notify();
1581             }
1582         }
1583     }
1584
1585     m_lasterror = m_parent_i_stream->GetLastError();
1586     return IsOk();
1587 }
1588
1589 bool wxZipInputStream::OpenDecompressor(bool raw /*=false*/)
1590 {
1591     wxASSERT(AfterHeader());
1592
1593     wxFileOffset compressedSize = m_entry.GetCompressedSize();
1594
1595     if (raw)
1596         m_raw = true;
1597
1598     if (m_raw) {
1599         if (compressedSize != wxInvalidOffset) {
1600             m_store->Open(compressedSize);
1601             m_decomp = m_store;
1602         } else {
1603             if (!m_rawin)
1604                 m_rawin = new wxRawInputStream(*m_parent_i_stream);
1605             m_decomp = m_rawin->Open(OpenDecompressor(m_rawin->GetTee()));
1606         }
1607     } else {
1608         if (compressedSize != wxInvalidOffset &&
1609                 (m_entry.GetMethod() != wxZIP_METHOD_DEFLATE ||
1610                  wxZlibInputStream::CanHandleGZip())) {
1611             m_store->Open(compressedSize);
1612             m_decomp = OpenDecompressor(*m_store);
1613         } else {
1614             m_decomp = OpenDecompressor(*m_parent_i_stream);
1615         }
1616     }
1617
1618     m_crcAccumulator = crc32(0, Z_NULL, 0);
1619     m_lasterror = m_decomp ? m_decomp->GetLastError() : wxSTREAM_READ_ERROR;
1620     return IsOk();
1621 }
1622
1623 // Can be overriden to add support for additional decompression methods
1624 //
1625 wxInputStream *wxZipInputStream::OpenDecompressor(wxInputStream& stream)
1626 {
1627     switch (m_entry.GetMethod()) {
1628         case wxZIP_METHOD_STORE:
1629             if (m_entry.GetSize() == wxInvalidOffset) {
1630                 wxLogError(_("stored file length not in Zip header"));
1631                 break;
1632             }
1633             m_store->Open(m_entry.GetSize());
1634             return m_store;
1635
1636         case wxZIP_METHOD_DEFLATE:
1637             if (!m_inflate)
1638                 m_inflate = new wxZlibInputStream2(stream);
1639             else
1640                 m_inflate->Open(stream);
1641             return m_inflate;
1642
1643         default:
1644             wxLogError(_("unsupported Zip compression method"));
1645     }
1646
1647     return NULL;
1648 }
1649
1650 bool wxZipInputStream::CloseDecompressor(wxInputStream *decomp)
1651 {
1652     if (decomp && decomp == m_rawin)
1653         return CloseDecompressor(m_rawin->GetFilterInputStream());
1654     if (decomp != m_store && decomp != m_inflate)
1655         delete decomp;
1656     return true;
1657 }
1658
1659 // Closes the current entry and positions the underlying stream at the start
1660 // of the next entry
1661 //
1662 bool wxZipInputStream::CloseEntry()
1663 {
1664     if (AtHeader())
1665         return true;
1666     if (m_lasterror == wxSTREAM_READ_ERROR)
1667         return false;
1668
1669     if (!m_parentSeekable) {
1670         if (!IsOpened() && !OpenDecompressor(true))
1671             return false;
1672
1673         const int BUFSIZE = 8192;
1674         wxCharBuffer buf(BUFSIZE);
1675         while (IsOk())
1676             Read(buf.data(), BUFSIZE);
1677
1678         m_position += m_headerSize + m_entry.GetCompressedSize();
1679     }
1680
1681     if (m_lasterror == wxSTREAM_EOF)
1682         m_lasterror = wxSTREAM_NO_ERROR;
1683
1684     CloseDecompressor(m_decomp);
1685     m_decomp = NULL;
1686     m_entry = wxZipEntry();
1687     m_headerSize = 0;
1688     m_raw = false;
1689
1690     return IsOk();
1691 }
1692
1693 size_t wxZipInputStream::OnSysRead(void *buffer, size_t size)
1694 {
1695     if (!IsOpened())
1696         if ((AtHeader() && !DoOpen()) || !OpenDecompressor())
1697             m_lasterror = wxSTREAM_READ_ERROR;
1698     if (!IsOk() || !size)
1699         return 0;
1700
1701     size_t count = m_decomp->Read(buffer, size).LastRead();
1702     if (!m_raw)
1703         m_crcAccumulator = crc32(m_crcAccumulator, (Byte*)buffer, count);
1704     m_lasterror = m_decomp->GetLastError();
1705
1706     if (Eof()) {
1707         if ((m_entry.GetFlags() & wxZIP_SUMS_FOLLOW) != 0) {
1708             m_headerSize += m_entry.ReadDescriptor(*m_parent_i_stream);
1709             wxZipEntry *entry = m_weaklinks->GetEntry(m_entry.GetKey());
1710
1711             if (entry) {
1712                 entry->SetCrc(m_entry.GetCrc());
1713                 entry->SetCompressedSize(m_entry.GetCompressedSize());
1714                 entry->SetSize(m_entry.GetSize());
1715                 entry->Notify();
1716             }
1717         }
1718
1719         if (!m_raw) {
1720             m_lasterror = wxSTREAM_READ_ERROR;
1721
1722             if (m_parent_i_stream->IsOk()) {
1723                 if (m_entry.GetSize() != TellI())
1724                     wxLogError(_("reading zip stream (entry %s): bad length"),
1725                                m_entry.GetName().c_str());
1726                 else if (m_crcAccumulator != m_entry.GetCrc())
1727                     wxLogError(_("reading zip stream (entry %s): bad crc"),
1728                                m_entry.GetName().c_str());
1729                 else
1730                     m_lasterror = wxSTREAM_EOF;
1731             }
1732         }
1733     }
1734
1735     return count;
1736 }
1737
1738 // Borrowed from VS's zip stream (c) 1999 Vaclav Slavik
1739 //
1740 wxFileOffset wxZipInputStream::OnSysSeek(wxFileOffset seek, wxSeekMode mode)
1741 {
1742     if (!m_ffile || AtHeader())
1743         return wxInvalidOffset;
1744
1745     // NB: since ZIP files don't natively support seeking, we have to
1746     //     implement a brute force workaround -- reading all the data
1747     //     between current and the new position (or between beginning of
1748     //     the file and new position...)
1749
1750     wxFileOffset nextpos;
1751     wxFileOffset pos = TellI();
1752
1753     switch ( mode )
1754     {
1755         case wxFromCurrent : nextpos = seek + pos; break;
1756         case wxFromStart : nextpos = seek; break;
1757         case wxFromEnd : nextpos = GetLength() - 1 + seek; break;
1758         default : nextpos = pos; break; /* just to fool compiler, never happens */
1759     }
1760
1761     size_t toskip;
1762     if ( nextpos >= pos )
1763     {
1764         toskip = (size_t)(nextpos - pos);
1765     }
1766     else
1767     {
1768         wxZipEntry current(m_entry);
1769         CloseEntry();
1770         if (!OpenEntry(current))
1771         {
1772             m_lasterror = wxSTREAM_READ_ERROR;
1773             return pos;
1774         }
1775         toskip = (size_t)nextpos;
1776     }
1777
1778     if ( toskip > 0 )
1779     {
1780         const size_t BUFSIZE = 4096;
1781         size_t sz;
1782         char buffer[BUFSIZE];
1783         while ( toskip > 0 )
1784         {
1785             sz = wxMin(toskip, BUFSIZE);
1786             Read(buffer, sz);
1787             toskip -= sz;
1788         }
1789     }
1790
1791     pos = nextpos;
1792     return pos;
1793 }
1794
1795
1796 /////////////////////////////////////////////////////////////////////////////
1797 // Output stream
1798
1799 #include "wx/listimpl.cpp"
1800 WX_DEFINE_LIST(_wxZipEntryList);
1801
1802 wxZipOutputStream::wxZipOutputStream(wxOutputStream& stream,
1803                                      int level      /*=-1*/,
1804                                      wxMBConv& conv /*=wxConvLocal*/)
1805   : wxArchiveOutputStream(stream, conv),
1806     m_store(new wxStoredOutputStream(stream)),
1807     m_deflate(NULL),
1808     m_backlink(NULL),
1809     m_initialData(new char[OUTPUT_LATENCY]),
1810     m_initialSize(0),
1811     m_pending(NULL),
1812     m_raw(false),
1813     m_headerOffset(0),
1814     m_headerSize(0),
1815     m_entrySize(0),
1816     m_comp(NULL),
1817     m_level(level),
1818     m_offsetAdjustment(wxInvalidOffset)
1819 {
1820 }
1821
1822 wxZipOutputStream::~wxZipOutputStream()
1823 {
1824     Close();
1825     WX_CLEAR_LIST(_wxZipEntryList, m_entries);
1826     delete m_store;
1827     delete m_deflate;
1828     delete m_pending;
1829     delete [] m_initialData;
1830     if (m_backlink)
1831         m_backlink->Release(this);
1832 }
1833
1834 bool wxZipOutputStream::PutNextEntry(
1835     const wxString& name,
1836     const wxDateTime& dt /*=wxDateTime::Now()*/,
1837     wxFileOffset size    /*=wxInvalidOffset*/)
1838 {
1839     return PutNextEntry(new wxZipEntry(name, dt, size));
1840 }
1841
1842 bool wxZipOutputStream::PutNextDirEntry(
1843     const wxString& name,
1844     const wxDateTime& dt /*=wxDateTime::Now()*/)
1845 {
1846     wxZipEntry *entry = new wxZipEntry(name, dt);
1847     entry->SetIsDir();
1848     return PutNextEntry(entry);
1849 }
1850
1851 bool wxZipOutputStream::CopyEntry(wxZipEntry *entry,
1852                                   wxZipInputStream& inputStream)
1853 {
1854     _wxZipEntryPtr e(entry);
1855
1856     return
1857         inputStream.DoOpen(e.get(), true) &&
1858         DoCreate(e.release(), true) &&
1859         Write(inputStream).IsOk() && inputStream.Eof();
1860 }
1861
1862 bool wxZipOutputStream::PutNextEntry(wxArchiveEntry *entry)
1863 {
1864     wxZipEntry *zipEntry = wxStaticCast(entry, wxZipEntry);
1865     if (!zipEntry)
1866         delete entry;
1867     return PutNextEntry(zipEntry);
1868 }
1869
1870 bool wxZipOutputStream::CopyEntry(wxArchiveEntry *entry,
1871                                   wxArchiveInputStream& stream)
1872 {
1873     wxZipEntry *zipEntry = wxStaticCast(entry, wxZipEntry);
1874
1875     if (!zipEntry || !stream.OpenEntry(*zipEntry)) {
1876         delete entry;
1877         return false;
1878     }
1879
1880     return CopyEntry(zipEntry, wx_static_cast(wxZipInputStream&, stream));
1881 }
1882
1883 bool wxZipOutputStream::CopyArchiveMetaData(wxZipInputStream& inputStream)
1884 {
1885     m_Comment = inputStream.GetComment();
1886     if (m_backlink)
1887         m_backlink->Release(this);
1888     m_backlink = inputStream.MakeLink(this);
1889     return true;
1890 }
1891
1892 bool wxZipOutputStream::CopyArchiveMetaData(wxArchiveInputStream& stream)
1893 {
1894     return CopyArchiveMetaData(wx_static_cast(wxZipInputStream&, stream));
1895 }
1896
1897 void wxZipOutputStream::SetLevel(int level)
1898 {
1899     if (level != m_level) {
1900         if (m_comp != m_deflate)
1901             delete m_deflate;
1902         m_deflate = NULL;
1903         m_level = level;
1904     }
1905 }
1906
1907 bool wxZipOutputStream::DoCreate(wxZipEntry *entry, bool raw /*=false*/)
1908 {
1909     CloseEntry();
1910
1911     m_pending = entry;
1912     if (!m_pending)
1913         return false;
1914
1915     // write the signature bytes right away
1916     wxDataOutputStream ds(*m_parent_o_stream);
1917     ds << LOCAL_MAGIC;
1918
1919     // and if this is the first entry test for seekability
1920     if (m_headerOffset == 0) {
1921         bool logging = wxLog::IsEnabled();
1922         wxLogNull nolog;
1923         wxFileOffset here = m_parent_o_stream->TellO();
1924
1925         if (here != wxInvalidOffset && here >= 4) {
1926             if (m_parent_o_stream->SeekO(here - 4) == here - 4) {
1927                 m_offsetAdjustment = here - 4;
1928                 wxLog::EnableLogging(logging);
1929                 m_parent_o_stream->SeekO(here);
1930             }
1931         }
1932     }
1933
1934     m_pending->SetOffset(m_headerOffset);
1935
1936     m_crcAccumulator = crc32(0, Z_NULL, 0);
1937
1938     if (raw)
1939         m_raw = true;
1940
1941     m_lasterror = wxSTREAM_NO_ERROR;
1942     return true;
1943 }
1944
1945 // Can be overriden to add support for additional compression methods
1946 //
1947 wxOutputStream *wxZipOutputStream::OpenCompressor(
1948     wxOutputStream& stream,
1949     wxZipEntry& entry,
1950     const Buffer bufs[])
1951 {
1952     if (entry.GetMethod() == wxZIP_METHOD_DEFAULT) {
1953         if (GetLevel() == 0
1954                 && (IsParentSeekable()
1955                     || entry.GetCompressedSize() != wxInvalidOffset
1956                     || entry.GetSize() != wxInvalidOffset)) {
1957             entry.SetMethod(wxZIP_METHOD_STORE);
1958         } else {
1959             int size = 0;
1960             for (int i = 0; bufs[i].m_data; ++i)
1961                 size += bufs[i].m_size;
1962             entry.SetMethod(size <= 6 ?
1963                             wxZIP_METHOD_STORE : wxZIP_METHOD_DEFLATE);
1964         }
1965     }
1966
1967     switch (entry.GetMethod()) {
1968         case wxZIP_METHOD_STORE:
1969             if (entry.GetCompressedSize() == wxInvalidOffset)
1970                 entry.SetCompressedSize(entry.GetSize());
1971             return m_store;
1972
1973         case wxZIP_METHOD_DEFLATE:
1974         {
1975             int defbits = wxZIP_DEFLATE_NORMAL;
1976             switch (GetLevel()) {
1977                 case 0: case 1:
1978                     defbits = wxZIP_DEFLATE_SUPERFAST;
1979                     break;
1980                 case 2: case 3: case 4:
1981                     defbits = wxZIP_DEFLATE_FAST;
1982                     break;
1983                 case 8: case 9:
1984                     defbits = wxZIP_DEFLATE_EXTRA;
1985                     break;
1986             }
1987             entry.SetFlags((entry.GetFlags() & ~wxZIP_DEFLATE_MASK) |
1988                             defbits | wxZIP_SUMS_FOLLOW);
1989
1990             if (!m_deflate)
1991                 m_deflate = new wxZlibOutputStream2(stream, GetLevel());
1992             else
1993                 m_deflate->Open(stream);
1994
1995             return m_deflate;
1996         }
1997
1998         default:
1999             wxLogError(_("unsupported Zip compression method"));
2000     }
2001
2002     return NULL;
2003 }
2004
2005 bool wxZipOutputStream::CloseCompressor(wxOutputStream *comp)
2006 {
2007     if (comp == m_deflate)
2008         m_deflate->Close();
2009     else if (comp != m_store)
2010         delete comp;
2011     return true;
2012 }
2013
2014 // This is called when OUPUT_LATENCY bytes has been written to the
2015 // wxZipOutputStream to actually create the zip entry.
2016 //
2017 void wxZipOutputStream::CreatePendingEntry(const void *buffer, size_t size)
2018 {
2019     wxASSERT(IsOk() && m_pending && !m_comp);
2020     _wxZipEntryPtr spPending(m_pending);
2021     m_pending = NULL;
2022
2023     Buffer bufs[] = {
2024         { m_initialData, m_initialSize },
2025         { (const char*)buffer, size },
2026         { NULL, 0 }
2027     };
2028
2029     if (m_raw)
2030         m_comp = m_store;
2031     else
2032         m_comp = OpenCompressor(*m_store, *spPending,
2033                                 m_initialSize ? bufs : bufs + 1);
2034
2035     if (IsParentSeekable()
2036         || (spPending->m_Crc
2037             && spPending->m_CompressedSize != wxInvalidOffset
2038             && spPending->m_Size != wxInvalidOffset))
2039         spPending->m_Flags &= ~wxZIP_SUMS_FOLLOW;
2040     else
2041         if (spPending->m_CompressedSize != wxInvalidOffset)
2042             spPending->m_Flags |= wxZIP_SUMS_FOLLOW;
2043
2044     m_headerSize = spPending->WriteLocal(*m_parent_o_stream, GetConv());
2045     m_lasterror = m_parent_o_stream->GetLastError();
2046
2047     if (IsOk()) {
2048         m_entries.push_back(spPending.release());
2049         OnSysWrite(m_initialData, m_initialSize);
2050     }
2051
2052     m_initialSize = 0;
2053 }
2054
2055 // This is called to write out the zip entry when Close has been called
2056 // before OUTPUT_LATENCY bytes has been written to the wxZipOutputStream.
2057 //
2058 void wxZipOutputStream::CreatePendingEntry()
2059 {
2060     wxASSERT(IsOk() && m_pending && !m_comp);
2061     _wxZipEntryPtr spPending(m_pending);
2062     m_pending = NULL;
2063     m_lasterror = wxSTREAM_WRITE_ERROR;
2064
2065     if (!m_raw) {
2066         // Initially compresses the data to memory, then fall back to 'store'
2067         // if the compressor makes the data larger rather than smaller.
2068         wxMemoryOutputStream mem;
2069         Buffer bufs[] = { { m_initialData, m_initialSize }, { NULL, 0 } };
2070         wxOutputStream *comp = OpenCompressor(mem, *spPending, bufs);
2071
2072         if (!comp)
2073             return;
2074         if (comp != m_store) {
2075             bool ok = comp->Write(m_initialData, m_initialSize).IsOk();
2076             CloseCompressor(comp);
2077             if (!ok)
2078                 return;
2079         }
2080
2081         m_entrySize = m_initialSize;
2082         m_crcAccumulator = crc32(0, (Byte*)m_initialData, m_initialSize);
2083
2084         if (mem.GetSize() > 0 && mem.GetSize() < m_initialSize) {
2085             m_initialSize = mem.GetSize();
2086             mem.CopyTo(m_initialData, m_initialSize);
2087         } else {
2088             spPending->SetMethod(wxZIP_METHOD_STORE);
2089         }
2090
2091         spPending->SetSize(m_entrySize);
2092         spPending->SetCrc(m_crcAccumulator);
2093         spPending->SetCompressedSize(m_initialSize);
2094     }
2095
2096     spPending->m_Flags &= ~wxZIP_SUMS_FOLLOW;
2097     m_headerSize = spPending->WriteLocal(*m_parent_o_stream, GetConv());
2098
2099     if (m_parent_o_stream->IsOk()) {
2100         m_entries.push_back(spPending.release());
2101         m_comp = m_store;
2102         m_store->Write(m_initialData, m_initialSize);
2103     }
2104
2105     m_initialSize = 0;
2106     m_lasterror = m_parent_o_stream->GetLastError();
2107 }
2108
2109 // Write the 'central directory' and the 'end-central-directory' records.
2110 //
2111 bool wxZipOutputStream::Close()
2112 {
2113     CloseEntry();
2114
2115     if (m_lasterror == wxSTREAM_WRITE_ERROR || m_entries.size() == 0)
2116         return false;
2117
2118     wxZipEndRec endrec;
2119
2120     endrec.SetEntriesHere(m_entries.size());
2121     endrec.SetTotalEntries(m_entries.size());
2122     endrec.SetOffset(m_headerOffset);
2123     endrec.SetComment(m_Comment);
2124
2125     _wxZipEntryList::iterator it;
2126     wxFileOffset size = 0;
2127
2128     for (it = m_entries.begin(); it != m_entries.end(); ++it) {
2129         size += (*it)->WriteCentral(*m_parent_o_stream, GetConv());
2130         delete *it;
2131     }
2132     m_entries.clear();
2133
2134     endrec.SetSize(size);
2135     endrec.Write(*m_parent_o_stream, GetConv());
2136
2137     m_lasterror = m_parent_o_stream->GetLastError();
2138     if (!IsOk())
2139         return false;
2140     m_lasterror = wxSTREAM_EOF;
2141     return true;
2142 }
2143
2144 // Finish writing the current entry
2145 //
2146 bool wxZipOutputStream::CloseEntry()
2147 {
2148     if (IsOk() && m_pending)
2149         CreatePendingEntry();
2150     if (!IsOk())
2151         return false;
2152     if (!m_comp)
2153         return true;
2154
2155     CloseCompressor(m_comp);
2156     m_comp = NULL;
2157
2158     wxFileOffset compressedSize = m_store->TellO();
2159
2160     wxZipEntry& entry = *m_entries.back();
2161
2162     // When writing raw the crc and size can't be checked
2163     if (m_raw) {
2164         m_crcAccumulator = entry.GetCrc();
2165         m_entrySize = entry.GetSize();
2166     }
2167
2168     // Write the sums in the trailing 'data descriptor' if necessary
2169     if (entry.m_Flags & wxZIP_SUMS_FOLLOW) {
2170         wxASSERT(!IsParentSeekable());
2171         m_headerOffset +=
2172             entry.WriteDescriptor(*m_parent_o_stream, m_crcAccumulator,
2173                                   compressedSize, m_entrySize);
2174         m_lasterror = m_parent_o_stream->GetLastError();
2175     }
2176
2177     // If the local header didn't have the correct crc and size written to
2178     // it then seek back and fix it
2179     else if (m_crcAccumulator != entry.GetCrc()
2180             || m_entrySize != entry.GetSize()
2181             || compressedSize != entry.GetCompressedSize())
2182     {
2183         if (IsParentSeekable()) {
2184             wxFileOffset here = m_parent_o_stream->TellO();
2185             wxFileOffset headerOffset = m_headerOffset + m_offsetAdjustment;
2186             m_parent_o_stream->SeekO(headerOffset + SUMS_OFFSET);
2187             entry.WriteDescriptor(*m_parent_o_stream, m_crcAccumulator,
2188                                   compressedSize, m_entrySize);
2189             m_parent_o_stream->SeekO(here);
2190             m_lasterror = m_parent_o_stream->GetLastError();
2191         } else {
2192             m_lasterror = wxSTREAM_WRITE_ERROR;
2193         }
2194     }
2195
2196     m_headerOffset += m_headerSize + compressedSize;
2197     m_headerSize = 0;
2198     m_entrySize = 0;
2199     m_store->Close();
2200     m_raw = false;
2201
2202     if (IsOk())
2203         m_lasterror = m_parent_o_stream->GetLastError();
2204     else
2205         wxLogError(_("error writing zip entry '%s': bad crc or length"),
2206                    entry.GetName().c_str());
2207     return IsOk();
2208 }
2209
2210 void wxZipOutputStream::Sync()
2211 {
2212     if (IsOk() && m_pending)
2213         CreatePendingEntry(NULL, 0);
2214     if (!m_comp)
2215         m_lasterror = wxSTREAM_WRITE_ERROR;
2216     if (IsOk()) {
2217         m_comp->Sync();
2218         m_lasterror = m_comp->GetLastError();
2219     }
2220 }
2221
2222 size_t wxZipOutputStream::OnSysWrite(const void *buffer, size_t size)
2223 {
2224     if (IsOk() && m_pending) {
2225         if (m_initialSize + size < OUTPUT_LATENCY) {
2226             memcpy(m_initialData + m_initialSize, buffer, size);
2227             m_initialSize += size;
2228             return size;
2229         } else {
2230             CreatePendingEntry(buffer, size);
2231         }
2232     }
2233
2234     if (!m_comp)
2235         m_lasterror = wxSTREAM_WRITE_ERROR;
2236     if (!IsOk() || !size)
2237         return 0;
2238
2239     if (m_comp->Write(buffer, size).LastWrite() != size)
2240         m_lasterror = wxSTREAM_WRITE_ERROR;
2241     m_crcAccumulator = crc32(m_crcAccumulator, (Byte*)buffer, size);
2242     m_entrySize += m_comp->LastWrite();
2243
2244     return m_comp->LastWrite();
2245 }
2246
2247 #endif // wxUSE_ZLIB && wxUSE_STREAMS && wxUSE_ZIPSTREAM