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Added tests for buffered streams.

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Made wxBufferedOutputStream call Sync() in
    the destructor and SeekO().
  Documented this.
  Use buffered streams in wxImage. Seems to
    significantly speed-up the sample.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4847 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
1999-12-06 18:16:37 +00:00
parent 85d11a7072
commit 1b055864b6
5 changed files with 125 additions and 6 deletions
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74
samples/typetest/typetest.cpp
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@@ -60,6 +60,7 @@ BEGIN_EVENT_TABLE(MyApp, wxApp)
#if wxUSE_UNICODE
EVT_MENU(TYPES_UNICODE, MyApp::DoUnicodeDemo)
#endif
EVT_MENU(TYPES_STREAM2, MyApp::DoStreamDemo2)
EVT_MENU(TYPES_STREAM, MyApp::DoStreamDemo)
EVT_MENU(TYPES_MIME, MyApp::DoMIMEDemo)
END_EVENT_TABLE()
@@ -89,6 +90,7 @@ bool MyApp::OnInit()
test_menu->Append(TYPES_UNICODE, "&Unicode test");
#endif
test_menu->Append(TYPES_STREAM, "&Stream test");
test_menu->Append(TYPES_STREAM2, "&Stream seek test");
test_menu->AppendSeparator();
test_menu->Append(TYPES_MIME, "&MIME database test");
@@ -256,6 +258,78 @@ void MyApp::DoStreamDemo(wxCommandEvent& WXUNUSED(event))
textCtrl.WriteText( tmp );
}
void MyApp::DoStreamDemo2(wxCommandEvent& WXUNUSED(event))
{
wxTextCtrl& textCtrl = * GetTextCtrl();
textCtrl.Clear();
textCtrl << _T("\nTest wxBufferedStream:\n\n");
char ch,ch2;
textCtrl.WriteText( "Writing number 0 to 9 to buffered wxFileOutputStream:\n\n" );
wxFileOutputStream file_output( "test_wx.dat" );
wxBufferedOutputStream buf_output( file_output );
for (ch = 0; ch < 10; ch++)
buf_output.Write( &ch, 1 );
buf_output.Sync();
wxFileInputStream file_input( "test_wx.dat" );
for (ch2 = 0; ch2 < 10; ch2++)
{
file_input.Read( &ch, 1 );
textCtrl.WriteText( (char)(ch + '0') );
}
textCtrl.WriteText( "\n\n\n" );
textCtrl.WriteText( "Writing number 0 to 9 to buffered wxFileOutputStream, then\n" );
textCtrl.WriteText( "seeking back to #3 and writing 3:\n\n" );
wxFileOutputStream file_output2( "test_wx2.dat" );
wxBufferedOutputStream buf_output2( file_output2 );
for (ch = 0; ch < 10; ch++)
buf_output2.Write( &ch, 1 );
buf_output2.SeekO( 3 );
ch = 3;
buf_output2.Write( &ch, 1 );
buf_output2.Sync();
wxFileInputStream file_input2( "test_wx2.dat" );
for (ch2 = 0; ch2 < 10; ch2++)
{
file_input2.Read( &ch, 1 );
textCtrl.WriteText( (char)(ch + '0') );
}
textCtrl.WriteText( "\n\n\n" );
// now append 2000 bytes to file (bigger than buffer)
buf_output2.SeekO( 0, wxFromEnd );
ch = 1;
for (int i = 0; i < 2000; i++)
buf_output2.Write( &ch, 1 );
buf_output2.Sync();
textCtrl.WriteText( "Reading number 0 to 9 from buffered wxFileInputStream, then\n" );
textCtrl.WriteText( "seeking back to #3 and reading 3:\n\n" );
wxFileInputStream file_input3( "test_wx2.dat" );
wxBufferedInputStream buf_input3( file_input3 );
for (ch2 = 0; ch2 < 10; ch2++)
{
buf_input3.Read( &ch, 1 );
textCtrl.WriteText( (char)(ch + '0') );
}
for (int j = 0; j < 2000; j++)
buf_input3.Read( &ch, 1 );
textCtrl.WriteText( "\n" );
buf_input3.SeekI( 3 );
buf_input3.Read( &ch, 1 );
textCtrl.WriteText( (char)(ch + '0') );
textCtrl.WriteText( "\n\n\n" );
}
#if wxUSE_UNICODE
void MyApp::DoUnicodeDemo(wxCommandEvent& WXUNUSED(event))
{