Blob support fixes - still does not work, but getting there

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

diff --git a/src/common/zstream.cpp b/src/common/zstream.cpp
index fd1dc1062f655601376f3b85db6191d29dc34d8f..5142f077b660439ed35a150452ccc7ef0ddde860 100644 (file)
--- a/src/common/zstream.cpp
+++ b/src/common/zstream.cpp
@@ -8,20 +8,35 @@
 // Copyright:   (c) Guilhem Lavaux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 // 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"
 #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__
 
 #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"
+
+// normally, the compiler options should contain -I../zlib, but it is
+// apparently not the case for all MSW makefiles and so, unless we use
+// configure (which defines __WX_SETUP_H__) or it is explicitly overridden by
+// the user (who can define wxUSE_ZLIB_H_IN_PATH), we hardcode the path here
+#if defined(__WXMSW__) && !defined(__WX_SETUP_H__) && !defined(wxUSE_ZLIB_H_IN_PATH)
+   #include "../zlib/zlib.h"
+#elif defined(__WXMAC__) && defined(__UNIX__)
+   #include <Kernel/net/zlib.h>
+#else
+   #include <zlib.h>

 #endif
 
 #define ZSTREAM_BUFFER_SIZE 1024
 #endif
 
 #define ZSTREAM_BUFFER_SIZE 1024


@@ -33,18 +48,14 @@
 wxZlibInputStream::wxZlibInputStream(wxInputStream& stream)
   : wxFilterInputStream(stream)
 {
 wxZlibInputStream::wxZlibInputStream(wxInputStream& stream)
   : wxFilterInputStream(stream)
 {

-  int err;
-

   // I need a private stream buffer.
   // I need a private stream buffer.

-  m_i_streambuf = new wxStreamBuffer(*this);
-  m_i_destroybuf = TRUE;

   m_inflate = new z_stream_s;
 
   m_inflate->zalloc = (alloc_func)0;
   m_inflate->zfree = (free_func)0;
   m_inflate->opaque = (voidpf)0;
 
   m_inflate = new z_stream_s;
 
   m_inflate->zalloc = (alloc_func)0;
   m_inflate->zfree = (free_func)0;
   m_inflate->opaque = (voidpf)0;
 

-  err = inflateInit(m_inflate);
+  int err = inflateInit(m_inflate);

   if (err != Z_OK) {
     inflateEnd(m_inflate);
     delete m_inflate;
   if (err != Z_OK) {
     inflateEnd(m_inflate);
     delete m_inflate;


@@ -62,9 +73,11 @@ wxZlibInputStream::~wxZlibInputStream()
 {
   inflateEnd(m_inflate);
   delete m_inflate;
 {
   inflateEnd(m_inflate);
   delete m_inflate;

+
+  delete [] m_z_buffer;

 }
 
 }
 

-size_t wxZlibInputStream::DoRead(void *buffer, size_t size)
+size_t wxZlibInputStream::OnSysRead(void *buffer, size_t size)

 {
   int err;
 
 {
   int err;
 


@@ -74,46 +87,51 @@ size_t wxZlibInputStream::DoRead(void *buffer, size_t size)
   while (m_inflate->avail_out > 0) {
     if (m_inflate->avail_in == 0) {
 
   while (m_inflate->avail_out > 0) {
     if (m_inflate->avail_in == 0) {
 

-      m_parent_i_stream->Read(m_z_buffer, m_z_size);
+      m_parent_i_stream->Read(m_z_buffer, wxMin(m_z_size, size));

       m_inflate->next_in = m_z_buffer;
       m_inflate->avail_in = m_parent_i_stream->LastRead();
 
       m_inflate->next_in = m_z_buffer;
       m_inflate->avail_in = m_parent_i_stream->LastRead();
 

-      if (m_parent_i_stream->Eof())
-        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
+      }
+
+      if ( m_inflate->avail_in == 0 )
+      {
+          // EOF
+          m_lasterror = wxStream_EOF;
+          break;
+      }

     }
     err = inflate(m_inflate, Z_FINISH);
     if (err == Z_STREAM_END)
     }
     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;
-}
-
-bool wxZlibInputStream::Eof() const
-{
-  if (!m_eof)
-    return m_parent_i_stream->Eof();
-  return m_eof;
+  return size-m_inflate->avail_out;

 }
 
 //////////////////////
 // wxZlibOutputStream
 //////////////////////
 
 }
 
 //////////////////////
 // wxZlibOutputStream
 //////////////////////
 

-wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream)
+wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream, int level)

  : wxFilterOutputStream(stream)
 {
   int err;
 
  : wxFilterOutputStream(stream)
 {
   int err;
 

-  m_o_streambuf = new wxStreamBuffer(*this);
-  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;
 
   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;
   if (err != Z_OK) {
     deflateEnd(m_deflate);
     return;


@@ -134,13 +152,14 @@ wxZlibOutputStream::~wxZlibOutputStream()
   Sync();
 
   err = deflate(m_deflate, Z_FINISH);
   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;
   }
 
   deflateEnd(m_deflate);
     return;
   }
 
   deflateEnd(m_deflate);

+  delete m_deflate;

 
   delete[] m_z_buffer;
 }
 
   delete[] m_z_buffer;
 }


@@ -155,16 +174,28 @@ void wxZlibOutputStream::Sync()
 
   err = deflate(m_deflate, Z_FULL_FLUSH);
   if (err != Z_OK) {
 
   err = deflate(m_deflate, Z_FULL_FLUSH);
   if (err != Z_OK) {

-    m_bad = TRUE;

     return;
   }
 
     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;
 }
 
   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;
 }
 

-size_t wxZlibOutputStream::DoWrite(const void *buffer, size_t size)
+size_t wxZlibOutputStream::OnSysWrite(const void *buffer, size_t size)

 {
   int err;
 
 {
   int err;
 


@@ -175,7 +206,7 @@ size_t wxZlibOutputStream::DoWrite(const void *buffer, size_t size)
 
     if (m_deflate->avail_out == 0) {
       m_parent_o_stream->Write(m_z_buffer, m_z_size);
 
     if (m_deflate->avail_out == 0) {
       m_parent_o_stream->Write(m_z_buffer, m_z_size);

-      if (m_parent_o_stream->Bad())
+      if (m_parent_o_stream->LastError() != wxStream_NOERROR)

         return (size - m_deflate->avail_in);
 
       m_deflate->next_out = m_z_buffer;
         return (size - m_deflate->avail_in);
 
       m_deflate->next_out = m_z_buffer;


@@ -189,9 +220,6 @@ size_t wxZlibOutputStream::DoWrite(const void *buffer, size_t size)
   return size;
 }
 
   return size;
 }
 

-bool wxZlibOutputStream::Bad() const
-{
-  if (!m_bad)
-    return m_parent_o_stream->Bad();
-  return m_bad;
-}
+#endif
+  // wxUSE_ZLIB && wxUSE_STREAMS
+