X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/de6185e212ebc37ff11ff70278e3c4f68419b097..db71eb0640221199170ac9ea83371c2d467fa456:/src/common/zipstrm.cpp

diff --git a/src/common/zipstrm.cpp b/src/common/zipstrm.cpp
index 1358b48275..6116b8e0c5 100644
--- a/src/common/zipstrm.cpp
+++ b/src/common/zipstrm.cpp
@@ -87,6 +87,9 @@ wxFORCE_LINK_THIS_MODULE(zipstrm)
 //
 static wxString ReadString(wxInputStream& stream, wxUint16 len, wxMBConv& conv)
 {
+    if (len == 0)
+        return wxEmptyString;
+
 #if wxUSE_UNICODE
     wxCharBuffer buf(len);
     stream.Read(buf.data(), len);
@@ -111,6 +114,14 @@ static inline wxUint32 CrackUint32(const char *m)
     return (n[3] << 24) | (n[2] << 16) | (n[1] << 8) | n[0];
 }
 
+// Decode a little endian wxUint16 number from a character array
+//
+static inline wxUint16 CrackUint16(const char *m)
+{
+    const unsigned char *n = (const unsigned char*)m;
+    return (n[1] << 8) | n[0];
+}
+
 // Temporarily lower the logging level in debug mode to avoid a warning
 // from SeekI about seeking on a stream with data written back to it.
 //
@@ -171,23 +182,23 @@ wxZipHeader::wxZipHeader(wxInputStream& stream, size_t size)
 wxUint8 wxZipHeader::Read8()
 {
     wxASSERT(m_pos < m_size);
-    return *wx_reinterpret_cast(wxUint8*, m_data + m_pos++);
+    return m_data[m_pos++];
 }
 
 wxUint16 wxZipHeader::Read16()
 {
     wxASSERT(m_pos + 2 <= m_size);
-    wxUint16 n = *wx_reinterpret_cast(wxUint16*, m_data + m_pos);
+    wxUint16 n = CrackUint16(m_data + m_pos);
     m_pos += 2;
-    return wxUINT16_SWAP_ON_BE(n);
+    return n;
 }
 
 wxUint32 wxZipHeader::Read32()
 {
     wxASSERT(m_pos + 4 <= m_size);
-    wxUint32 n = *wx_reinterpret_cast(wxUint32*, m_data + m_pos);
+    wxUint32 n = CrackUint32(m_data + m_pos);
     m_pos += 4;
-    return wxUINT32_SWAP_ON_BE(n);
+    return n;
 }
 
 
@@ -750,7 +761,7 @@ wxString wxZipEntry::GetName(wxPathFormat format /*=wxPATH_NATIVE*/) const
         case wxPATH_DOS:
         {
             wxString name(isDir ? m_Name + _T("\\") : m_Name);
-            for (size_t i = name.length() - 1; i > 0; --i)
+            for (size_t i = 0; i < name.length(); i++)
                 if (name[i] == _T('/'))
                     name[i] = _T('\\');
             return name;
@@ -1606,22 +1617,20 @@ wxStreamError wxZipInputStream::ReadLocal(bool readEndRec /*=false*/)
         return wxSTREAM_EOF;
     }
 
-    if (m_signature != LOCAL_MAGIC) {
-        wxLogError(_("error reading zip local header"));
-        return wxSTREAM_READ_ERROR;
-    }
-
-    m_headerSize = m_entry.ReadLocal(*m_parent_i_stream, GetConv());
-    m_signature = 0;
-    m_entry.SetOffset(m_position);
-    m_entry.SetKey(m_position);
+    if (m_signature == LOCAL_MAGIC) {
+        m_headerSize = m_entry.ReadLocal(*m_parent_i_stream, GetConv());
+        m_signature = 0;
+        m_entry.SetOffset(m_position);
+        m_entry.SetKey(m_position);
 
-    if (!m_headerSize) {
-        return wxSTREAM_READ_ERROR;
-    } else {
-        m_TotalEntries++;
-        return wxSTREAM_NO_ERROR;
+        if (m_headerSize) {
+            m_TotalEntries++;
+            return wxSTREAM_NO_ERROR;
+        }
     }
+
+    wxLogError(_("error reading zip local header"));
+    return wxSTREAM_READ_ERROR;
 }
 
 wxUint32 wxZipInputStream::ReadSignature()