some != NULL checks

[wxWidgets.git] / src / common / zstream.cpp

diff --git a/src/common/zstream.cpp b/src/common/zstream.cpp
index a0daeb4da9f6f7dbe10cd31dd1760a8c49626503..7ca4e3bac4bdb934b807f177fb14dbea0f959a93 100644 (file)
--- a/src/common/zstream.cpp
+++ b/src/common/zstream.cpp
@@ -8,20 +8,33 @@
 // Copyright:   (c) Guilhem Lavaux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
+
 #ifdef __GNUG__
 #pragma implementation "zstream.h"
 #endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
-#include <wx/stream.h>
-#include <wx/zstream.h>
-#include <wx/utils.h>
-#include <wx/intl.h>
-#include "../zlib/zlib.h"   // don't change this, Robert
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+  #pragma hdrstop
+#endif
+
+#if wxUSE_ZLIB && wxUSE_STREAMS
+
+#include "wx/zstream.h"
+#include "wx/utils.h"
+#include "wx/intl.h"
+#include "wx/log.h"
+
+// When using configure, the path must be "zlib.h" I don't know
+// what other ports (wxMac, wxMotif without configure) need here.
+// If we are building with configure (defines __WX_SETUP_H__), 
+// we trust the zlib path is given as a -I option.
+#if defined(__WXMSW__) && !defined(__WX_SETUP_H__)
+   #include "../zlib/zlib.h"
+#else
+   #include "zlib.h"
 #endif
 
 #define ZSTREAM_BUFFER_SIZE 1024
@@ -36,8 +49,6 @@ wxZlibInputStream::wxZlibInputStream(wxInputStream& stream)
   int err;
 
   // I need a private stream buffer.
-  m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
-  m_i_destroybuf = TRUE;
   m_inflate = new z_stream_s;
 
   m_inflate->zalloc = (alloc_func)0;
@@ -78,35 +89,40 @@ size_t wxZlibInputStream::OnSysRead(void *buffer, size_t size)
       m_inflate->next_in = m_z_buffer;
       m_inflate->avail_in = m_parent_i_stream->LastRead();
 
-      if (m_parent_i_stream->LastError() != wxStream_NOERROR)
-        return (size - m_inflate->avail_in);
+      if (m_parent_i_stream->LastError() != wxStream_NOERROR &&
+          m_parent_i_stream->LastError() != wxStream_EOF)
+      { 
+        m_lasterror = m_parent_i_stream->LastError();
+        return 0; // failed to read anything
+      }
     }
     err = inflate(m_inflate, Z_FINISH);
     if (err == Z_STREAM_END)
-      return (size - m_inflate->avail_in);
+      return (size - m_inflate->avail_out);
   }
 
-  return size-m_inflate->avail_in;
+  return size-m_inflate->avail_out;
 }
 
 //////////////////////
 // wxZlibOutputStream
 //////////////////////
 
-wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream)
+wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream, int level)
  : wxFilterOutputStream(stream)
 {
   int err;
 
-  m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
-  m_o_destroybuf = TRUE;
   m_deflate = new z_stream_s;
 
   m_deflate->zalloc = (alloc_func)0;
   m_deflate->zfree = (free_func)0;
   m_deflate->opaque = (voidpf)0;
 
-  err = deflateInit(m_deflate, Z_DEFAULT_COMPRESSION);
+  if (level == -1) level = Z_DEFAULT_COMPRESSION;
+  wxASSERT_MSG(level >= 0 && level <= 9, wxT("wxZlibOutputStream compression level must be between 0 and 9!"));
+
+  err = deflateInit(m_deflate, level);
   if (err != Z_OK) {
     deflateEnd(m_deflate);
     return;
@@ -127,9 +143,9 @@ wxZlibOutputStream::~wxZlibOutputStream()
   Sync();
 
   err = deflate(m_deflate, Z_FINISH);
-  if (err != Z_STREAM_END) {
-    wxDebugMsg(_("wxZlibOutputStream: an error occured while we was closing "
-               "the stream.\n"));
+  if (err != Z_STREAM_END) 
+  {
+    wxLogDebug( wxT("wxZlibOutputStream: an error occured while closing the stream.\n") );
     return;
   }
 
@@ -151,6 +167,19 @@ void wxZlibOutputStream::Sync()
     return;
   }
 
+  // Fixed by "Stefan Csomor" <csomor@advancedconcepts.ch>
+  while( m_deflate->avail_out == 0 )
+  {
+     m_parent_o_stream->Write(m_z_buffer, m_z_size );
+     m_deflate->next_out  = m_z_buffer;
+     m_deflate->avail_out = m_z_size;
+     err = deflate(m_deflate, Z_FULL_FLUSH);
+     if (err != Z_OK) {
+        return;
+     }
+  }
+  // End
+
   m_parent_o_stream->Write(m_z_buffer, m_z_size-m_deflate->avail_out);
   m_deflate->next_out  = m_z_buffer;
   m_deflate->avail_out = m_z_size;
@@ -180,3 +209,7 @@ size_t wxZlibOutputStream::OnSysWrite(const void *buffer, size_t size)
   }
   return size;
 }
+
+#endif
+  // wxUSE_ZLIB && wxUSE_STREAMS
+