some != NULL checks

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

diff --git a/src/common/zstream.cpp b/src/common/zstream.cpp
index 1090d6b3a297a148961138b65ca8b7eaf6219627..7ca4e3bac4bdb934b807f177fb14dbea0f959a93 100644 (file)
--- a/src/common/zstream.cpp
+++ b/src/common/zstream.cpp
@@ -32,7 +32,7 @@
 // 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"
+   #include "../zlib/zlib.h"
 #else
    #include "zlib.h"
 #endif
@@ -89,22 +89,26 @@ 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;
@@ -115,7 +119,10 @@ wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream)
   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;