/////////////////////////////////////////////////////////////////////////////
-// Name: zipstrm.cpp
+// Name: src/common/zipstrm.cpp
// Purpose: Streams for Zip files
// Author: Mike Wetherell
// RCS-ID: $Id$
}
+/////////////////////////////////////////////////////////////////////////////
+// Read a zip header
+
+class wxZipHeader
+{
+public:
+ wxZipHeader(wxInputStream& stream, size_t size);
+
+ inline wxUint8 Read8();
+ inline wxUint16 Read16();
+ inline wxUint32 Read32();
+
+ const char *GetData() const { return m_data; }
+ size_t GetSize() const { return m_size; }
+ operator bool() const { return m_ok; }
+
+ size_t Seek(size_t pos) { m_pos = pos; return m_pos; }
+ size_t Skip(size_t size) { m_pos += size; return m_pos; }
+
+ wxZipHeader& operator>>(wxUint8& n) { n = Read8(); return *this; }
+ wxZipHeader& operator>>(wxUint16& n) { n = Read16(); return *this; }
+ wxZipHeader& operator>>(wxUint32& n) { n = Read32(); return *this; }
+
+private:
+ char m_data[64];
+ size_t m_size;
+ size_t m_pos;
+ bool m_ok;
+};
+
+wxZipHeader::wxZipHeader(wxInputStream& stream, size_t size)
+ : m_size(0),
+ m_pos(0),
+ m_ok(false)
+{
+ wxCHECK_RET(size <= sizeof(m_data), _T("buffer too small"));
+ m_size = stream.Read(m_data, size).LastRead();
+ m_ok = m_size == size;
+}
+
+wxUint8 wxZipHeader::Read8()
+{
+ wxASSERT(m_pos < m_size);
+ return *wx_reinterpret_cast(wxUint8*, m_data + m_pos++);
+}
+
+wxUint16 wxZipHeader::Read16()
+{
+ wxASSERT(m_pos + 2 <= m_size);
+ wxUint16 n = *wx_reinterpret_cast(wxUint16*, m_data + m_pos);
+ m_pos += 2;
+ return wxUINT16_SWAP_ON_BE(n);
+}
+
+wxUint32 wxZipHeader::Read32()
+{
+ wxASSERT(m_pos + 4 <= m_size);
+ wxUint32 n = *wx_reinterpret_cast(wxUint32*, m_data + m_pos);
+ m_pos += 4;
+ return wxUINT32_SWAP_ON_BE(n);
+}
+
+
/////////////////////////////////////////////////////////////////////////////
// Stored input stream
// Trival decompressor for files which are 'stored' in the zip file.
size_t wxStoredInputStream::OnSysRead(void *buffer, size_t size)
{
- size_t count = wxMin(size, wx_truncate_cast(size_t, m_len - m_pos));
+ size_t count = wx_truncate_cast(size_t,
+ wxMin(size + wxFileOffset(0), m_len - m_pos + size_t(0)));
count = m_parent_i_stream->Read(buffer, count).LastRead();
m_pos += count;
- if (m_pos == m_len)
- m_lasterror = wxSTREAM_EOF;
- else if (!*m_parent_i_stream)
- m_lasterror = wxSTREAM_READ_ERROR;
+ if (count < size)
+ m_lasterror = m_pos == m_len ? wxSTREAM_EOF : wxSTREAM_READ_ERROR;
return count;
}
size_t wxTeeInputStream::OnSysRead(void *buffer, size_t size)
{
size_t count = m_parent_i_stream->Read(buffer, size).LastRead();
- m_lasterror = m_parent_i_stream->GetLastError();
+ if (count < size)
+ m_lasterror = m_parent_i_stream->GetLastError();
return count;
}
wxFAIL; // we've already returned data that's now being ungot
m_end = len;
}
+ m_parent_i_stream->Reset();
m_parent_i_stream->Ungetch(m_wback, m_wbacksize);
free(m_wback);
m_wback = NULL;
size_t m_size;
size_t m_capacity;
int m_ref;
+
+ wxSUPPRESS_GCC_PRIVATE_DTOR_WARNING(wxZipMemory)
};
wxZipMemory *wxZipMemory::Unique(size_t size)
wxZipWeakLinks *AddEntry(wxZipEntry *entry, wxFileOffset key);
void RemoveEntry(wxFileOffset key)
- { m_entries.erase((wx__OffsetZipEntryMap::key_type)key); }
+ { m_entries.erase(wx_truncate_cast(key_type, key)); }
wxZipEntry *GetEntry(wxFileOffset key) const;
bool IsEmpty() const { return m_entries.empty(); }
private:
~wxZipWeakLinks() { wxASSERT(IsEmpty()); }
+ typedef wx__OffsetZipEntryMap::key_type key_type;
+
int m_ref;
wx__OffsetZipEntryMap m_entries;
+
+ wxSUPPRESS_GCC_PRIVATE_DTOR_WARNING(wxZipWeakLinks)
};
wxZipWeakLinks *wxZipWeakLinks::AddEntry(wxZipEntry *entry, wxFileOffset key)
{
- m_entries[(wx__OffsetZipEntryMap::key_type)key] = entry;
+ m_entries[wx_truncate_cast(key_type, key)] = entry;
m_ref++;
return this;
}
wxZipEntry *wxZipWeakLinks::GetEntry(wxFileOffset key) const
{
wx__OffsetZipEntryMap::const_iterator it =
- m_entries.find((wx__OffsetZipEntryMap::key_type)key);
+ m_entries.find(wx_truncate_cast(key_type, key));
return it != m_entries.end() ? it->second : NULL;
}
wxUint16 nameLen, extraLen;
wxUint32 compressedSize, size, crc;
- wxDataInputStream ds(stream);
+ wxZipHeader ds(stream, LOCAL_SIZE - 4);
+ if (!ds)
+ return 0;
ds >> m_VersionNeeded >> m_Flags >> m_Method;
SetDateTime(wxDateTime().SetFromDOS(ds.Read32()));
m_Size = size;
SetName(ReadString(stream, nameLen, conv), wxPATH_UNIX);
+ if (stream.LastRead() != nameLen + 0u)
+ return 0;
if (extraLen || GetLocalExtraLen()) {
Unique(m_LocalExtra, extraLen);
- if (extraLen)
+ if (extraLen) {
stream.Read(m_LocalExtra->GetData(), extraLen);
+ if (stream.LastRead() != extraLen + 0u)
+ return 0;
+ }
}
return LOCAL_SIZE + nameLen + extraLen;
const wxWX2MBbuf name_buf = conv.cWX2MB(unixName);
const char *name = name_buf;
if (!name) name = "";
- wxUint16 nameLen = (wxUint16)strlen(name);
+ wxUint16 nameLen = wx_truncate_cast(wxUint16, strlen(name));
wxDataOutputStream ds(stream);
ds.Write32(GetDateTime().GetAsDOS());
ds.Write32(m_Crc);
- ds.Write32(m_CompressedSize != wxInvalidOffset ? (wxUint32)m_CompressedSize : 0);
- ds.Write32(m_Size != wxInvalidOffset ? (wxUint32)m_Size : 0);
+ ds.Write32(m_CompressedSize != wxInvalidOffset ?
+ wx_truncate_cast(wxUint32, m_CompressedSize) : 0);
+ ds.Write32(m_Size != wxInvalidOffset ?
+ wx_truncate_cast(wxUint32, m_Size) : 0);
ds << nameLen;
- wxUint16 extraLen = (wxUint16)GetLocalExtraLen();
+ wxUint16 extraLen = wx_truncate_cast(wxUint16, GetLocalExtraLen());
ds.Write16(extraLen);
stream.Write(name, nameLen);
{
wxUint16 nameLen, extraLen, commentLen;
- wxDataInputStream ds(stream);
+ wxZipHeader ds(stream, CENTRAL_SIZE - 4);
+ if (!ds)
+ return 0;
ds >> m_VersionMadeBy >> m_SystemMadeBy;
SetOffset(ds.Read32());
SetName(ReadString(stream, nameLen, conv), wxPATH_UNIX);
+ if (stream.LastRead() != nameLen + 0u)
+ return 0;
if (extraLen || GetExtraLen()) {
Unique(m_Extra, extraLen);
- if (extraLen)
+ if (extraLen) {
stream.Read(m_Extra->GetData(), extraLen);
+ if (stream.LastRead() != extraLen + 0u)
+ return 0;
+ }
}
- if (commentLen)
+ if (commentLen) {
m_Comment = ReadString(stream, commentLen, conv);
- else
+ if (stream.LastRead() != commentLen + 0u)
+ return 0;
+ } else {
m_Comment.clear();
+ }
return CENTRAL_SIZE + nameLen + extraLen + commentLen;
}
const wxWX2MBbuf name_buf = conv.cWX2MB(unixName);
const char *name = name_buf;
if (!name) name = "";
- wxUint16 nameLen = (wxUint16)strlen(name);
+ wxUint16 nameLen = wx_truncate_cast(wxUint16, strlen(name));
const wxWX2MBbuf comment_buf = conv.cWX2MB(m_Comment);
const char *comment = comment_buf;
if (!comment) comment = "";
- wxUint16 commentLen = (wxUint16)strlen(comment);
+ wxUint16 commentLen = wx_truncate_cast(wxUint16, strlen(comment));
- wxUint16 extraLen = (wxUint16)GetExtraLen();
+ wxUint16 extraLen = wx_truncate_cast(wxUint16, GetExtraLen());
wxDataOutputStream ds(stream);
ds << CENTRAL_MAGIC << m_VersionMadeBy << m_SystemMadeBy;
- ds.Write16((wxUint16)GetVersionNeeded());
- ds.Write16((wxUint16)GetFlags());
- ds.Write16((wxUint16)GetMethod());
+ ds.Write16(wx_truncate_cast(wxUint16, GetVersionNeeded()));
+ ds.Write16(wx_truncate_cast(wxUint16, GetFlags()));
+ ds.Write16(wx_truncate_cast(wxUint16, GetMethod()));
ds.Write32(GetDateTime().GetAsDOS());
ds.Write32(GetCrc());
- ds.Write32((wxUint32)GetCompressedSize());
- ds.Write32((wxUint32)GetSize());
+ ds.Write32(wx_truncate_cast(wxUint32, GetCompressedSize()));
+ ds.Write32(wx_truncate_cast(wxUint32, GetSize()));
ds.Write16(nameLen);
ds.Write16(extraLen);
ds << commentLen << m_DiskStart << m_InternalAttributes
- << m_ExternalAttributes << (wxUint32)GetOffset();
+ << m_ExternalAttributes << wx_truncate_cast(wxUint32, GetOffset());
stream.Write(name, nameLen);
if (extraLen)
//
size_t wxZipEntry::ReadDescriptor(wxInputStream& stream)
{
- wxDataInputStream ds(stream);
+ wxZipHeader ds(stream, SUMS_SIZE);
+ if (!ds)
+ return 0;
m_Crc = ds.Read32();
m_CompressedSize = ds.Read32();
// if 1st value is the signature then this is probably an info-zip record
if (m_Crc == SUMS_MAGIC)
{
- char buf[8];
- stream.Read(buf, sizeof(buf));
- wxUint32 u1 = CrackUint32(buf);
- wxUint32 u2 = CrackUint32(buf + 4);
+ wxZipHeader buf(stream, 8);
+ wxUint32 u1 = buf.GetSize() >= 4 ? buf.Read32() : (wxUint32)LOCAL_MAGIC;
+ wxUint32 u2 = buf.GetSize() == 8 ? buf.Read32() : 0;
// look for the signature of the following record to decide which
if ((u1 == LOCAL_MAGIC || u1 == CENTRAL_MAGIC) &&
(u2 != LOCAL_MAGIC && u2 != CENTRAL_MAGIC))
{
// it's a pkzip style record after all!
- stream.Ungetch(buf, sizeof(buf));
+ if (buf.GetSize() > 0)
+ stream.Ungetch(buf.GetData(), buf.GetSize());
}
else
{
// it's an info-zip record as expected
- stream.Ungetch(buf + 4, sizeof(buf) - 4);
- m_Crc = (wxUint32)m_CompressedSize;
+ if (buf.GetSize() > 4)
+ stream.Ungetch(buf.GetData() + 4, buf.GetSize() - 4);
+ m_Crc = wx_truncate_cast(wxUint32, m_CompressedSize);
m_CompressedSize = m_Size;
m_Size = u1;
return SUMS_SIZE + 4;
wxDataOutputStream ds(stream);
ds.Write32(crc);
- ds.Write32((wxUint32)compressedSize);
- ds.Write32((wxUint32)size);
+ ds.Write32(wx_truncate_cast(wxUint32, compressedSize));
+ ds.Write32(wx_truncate_cast(wxUint32, size));
return SUMS_SIZE;
}
wxFileOffset GetOffset() const { return m_Offset; }
wxString GetComment() const { return m_Comment; }
- void SetDiskNumber(int num) { m_DiskNumber = (wxUint16)num; }
- void SetStartDisk(int num) { m_StartDisk = (wxUint16)num; }
- void SetEntriesHere(int num) { m_EntriesHere = (wxUint16)num; }
- void SetTotalEntries(int num) { m_TotalEntries = (wxUint16)num; }
- void SetSize(wxFileOffset size) { m_Size = (wxUint32)size; }
- void SetOffset(wxFileOffset offset) { m_Offset = (wxUint32)offset; }
- void SetComment(const wxString& comment) { m_Comment = comment; }
+ void SetDiskNumber(int num)
+ { m_DiskNumber = wx_truncate_cast(wxUint16, num); }
+ void SetStartDisk(int num)
+ { m_StartDisk = wx_truncate_cast(wxUint16, num); }
+ void SetEntriesHere(int num)
+ { m_EntriesHere = wx_truncate_cast(wxUint16, num); }
+ void SetTotalEntries(int num)
+ { m_TotalEntries = wx_truncate_cast(wxUint16, num); }
+ void SetSize(wxFileOffset size)
+ { m_Size = wx_truncate_cast(wxUint32, size); }
+ void SetOffset(wxFileOffset offset)
+ { m_Offset = wx_truncate_cast(wxUint32, offset); }
+ void SetComment(const wxString& comment)
+ { m_Comment = comment; }
bool Read(wxInputStream& stream, wxMBConv& conv);
bool Write(wxOutputStream& stream, wxMBConv& conv) const;
bool wxZipEndRec::Read(wxInputStream& stream, wxMBConv& conv)
{
- wxDataInputStream ds(stream);
+ wxZipHeader ds(stream, END_SIZE - 4);
+ if (!ds)
+ return false;
+
wxUint16 commentLen;
ds >> m_DiskNumber >> m_StartDisk >> m_EntriesHere
>> m_TotalEntries >> m_Size >> m_Offset >> commentLen;
- if (commentLen)
+ if (commentLen) {
m_Comment = ReadString(stream, commentLen, conv);
+ if (stream.LastRead() != commentLen + 0u)
+ return false;
+ }
- if (stream.IsOk())
- if (m_DiskNumber == 0 && m_StartDisk == 0 &&
- m_EntriesHere == m_TotalEntries)
- return true;
- else
- wxLogError(_("unsupported zip archive"));
+ if (m_DiskNumber != 0 || m_StartDisk != 0 ||
+ m_EntriesHere != m_TotalEntries)
+ wxLogWarning(_("assuming this is a multi-part zip concatenated"));
- return false;
+ return true;
}
int m_ref;
wxZipOutputStream *m_stream;
+
+ wxSUPPRESS_GCC_PRIVATE_DTOR_WARNING(wxZipStreamLink)
};
else {
wxLogNull nolog;
wxFileOffset pos = m_parent_i_stream->TellI();
- // FIXME
- //if (pos != wxInvalidOffset)
- if (pos >= 0 && pos <= LONG_MAX)
+ if (pos != wxInvalidOffset)
m_offsetAdjustment = m_position = pos;
return true;
}
// Read in the end record
wxFileOffset endPos = m_parent_i_stream->TellI() - 4;
- if (!endrec.Read(*m_parent_i_stream, GetConv())) {
- if (!*m_parent_i_stream) {
- m_lasterror = wxSTREAM_READ_ERROR;
- return false;
- }
- // TODO: try this out
- wxLogWarning(_("assuming this is a multi-part zip concatenated"));
- }
+ if (!endrec.Read(*m_parent_i_stream, GetConv()))
+ return false;
m_TotalEntries = endrec.GetTotalEntries();
m_Comment = endrec.GetComment();
wxFileOffset minpos = wxMax(pos - 65535L, 0);
while (pos > minpos) {
- size_t len = (size_t)(pos - wxMax(pos - (BUFSIZE - 3), minpos));
+ size_t len = wx_truncate_cast(size_t,
+ pos - wxMax(pos - (BUFSIZE - 3), minpos));
memcpy(buf.data() + len, buf, 3);
pos -= len;
if (QuietSeek(*m_parent_i_stream, m_position + 4) == wxInvalidOffset)
return wxSTREAM_READ_ERROR;
- m_position += m_entry.ReadCentral(*m_parent_i_stream, GetConv());
- if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR) {
+ size_t size = m_entry.ReadCentral(*m_parent_i_stream, GetConv());
+ if (!size) {
m_signature = 0;
return wxSTREAM_READ_ERROR;
}
+ m_position += size;
m_signature = ReadSignature();
if (m_offsetAdjustment)
if (m_weaklinks->IsEmpty() && m_streamlink == NULL)
return wxSTREAM_EOF;
- m_position += m_entry.ReadCentral(*m_parent_i_stream, GetConv());
+ size_t size = m_entry.ReadCentral(*m_parent_i_stream, GetConv());
+ m_position += size;
m_signature = 0;
- if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR)
+ if (!size)
return wxSTREAM_READ_ERROR;
wxZipEntry *entry = m_weaklinks->GetEntry(m_entry.GetOffset());
m_entry.SetOffset(m_position);
m_entry.SetKey(m_position);
- if (m_parent_i_stream->GetLastError() == wxSTREAM_READ_ERROR) {
+ if (!m_headerSize) {
return wxSTREAM_READ_ERROR;
} else {
m_TotalEntries++;
return false;
if (m_lasterror == wxSTREAM_READ_ERROR)
return false;
- wxCHECK(!IsOpened(), false);
+ if (IsOpened())
+ CloseEntry();
m_raw = raw;
if (m_parentSeekable || AtHeader()) {
m_headerSize = m_entry.ReadLocal(*m_parent_i_stream, GetConv());
- if (m_parentSeekable) {
+ if (m_headerSize && m_parentSeekable) {
wxZipEntry *ref = m_weaklinks->GetEntry(m_entry.GetKey());
if (ref) {
Copy(ref->m_LocalExtra, m_entry.m_LocalExtra);
}
}
- m_lasterror = m_parent_i_stream->GetLastError();
+ if (m_headerSize)
+ m_lasterror = wxSTREAM_NO_ERROR;
return IsOk();
}
size_t count = m_decomp->Read(buffer, size).LastRead();
if (!m_raw)
m_crcAccumulator = crc32(m_crcAccumulator, (Byte*)buffer, count);
- m_lasterror = m_decomp->GetLastError();
+ if (count < size)
+ m_lasterror = m_decomp->GetLastError();
if (Eof()) {
if ((m_entry.GetFlags() & wxZIP_SUMS_FOLLOW) != 0) {
if (!m_raw) {
m_lasterror = wxSTREAM_READ_ERROR;
- if (m_parent_i_stream->IsOk()) {
- if (m_entry.GetSize() != TellI())
- wxLogError(_("reading zip stream (entry %s): bad length"),
- m_entry.GetName().c_str());
- else if (m_crcAccumulator != m_entry.GetCrc())
- wxLogError(_("reading zip stream (entry %s): bad crc"),
- m_entry.GetName().c_str());
- else
- m_lasterror = wxSTREAM_EOF;
- }
+ if (m_entry.GetSize() != TellI())
+ wxLogError(_("reading zip stream (entry %s): bad length"),
+ m_entry.GetName().c_str());
+ else if (m_crcAccumulator != m_entry.GetCrc())
+ wxLogError(_("reading zip stream (entry %s): bad crc"),
+ m_entry.GetName().c_str());
+ else
+ m_lasterror = wxSTREAM_EOF;
}
}
default : nextpos = pos; break; /* just to fool compiler, never happens */
}
- size_t toskip wxDUMMY_INITIALIZE(0);
+ wxFileOffset toskip wxDUMMY_INITIALIZE(0);
if ( nextpos >= pos )
{
- toskip = (size_t)(nextpos - pos);
+ toskip = nextpos - pos;
}
else
{
wxZipEntry current(m_entry);
- CloseEntry();
if (!OpenEntry(current))
{
m_lasterror = wxSTREAM_READ_ERROR;
return pos;
}
- toskip = (size_t)nextpos;
+ toskip = nextpos;
}
if ( toskip > 0 )
{
- const size_t BUFSIZE = 4096;
+ const int BUFSIZE = 4096;
size_t sz;
char buffer[BUFSIZE];
while ( toskip > 0 )
{
- sz = wxMin(toskip, BUFSIZE);
+ sz = wx_truncate_cast(size_t, wxMin(toskip, BUFSIZE));
Read(buffer, sz);
toskip -= sz;
}
projects / wxWidgets.git / blobdiff