Return NULL from wxWindow::GetCapture() when the capture is being lost.

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

diff --git a/src/common/wfstream.cpp b/src/common/wfstream.cpp
index da1651e2a5df61169e7445698deece1c1607f527..362b1861d6b09cfa25b71f52bf407ba44ef51119 100644 (file)
--- a/src/common/wfstream.cpp
+++ b/src/common/wfstream.cpp
@@ -1,31 +1,32 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        fstream.cpp
+// Name:        src/common/wfstream.cpp

 // Purpose:     "File stream" classes
 // Author:      Julian Smart
 // Modified by:
 // Created:     11/07/98
 // Purpose:     "File stream" classes
 // Author:      Julian Smart
 // Modified by:
 // Created:     11/07/98

-// RCS-ID:      $Id$

 // Copyright:   (c) Guilhem Lavaux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Copyright:   (c) Guilhem Lavaux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-#pragma implementation "wfstream.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-  #pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

-#if wxUSE_STREAMS && wxUSE_FILE
+#if wxUSE_STREAMS

 
 

-#include <stdio.h>
-#include "wx/stream.h"

 #include "wx/wfstream.h"
 
 #include "wx/wfstream.h"
 

+#ifndef WX_PRECOMP
+    #include "wx/stream.h"
+#endif
+
+#include <stdio.h>
+
+#if wxUSE_FILE
+

 // ----------------------------------------------------------------------------
 // wxFileInputStream
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxFileInputStream
 // ----------------------------------------------------------------------------


@@ -34,26 +35,28 @@ wxFileInputStream::wxFileInputStream(const wxString& fileName)
   : wxInputStream()
 {
     m_file = new wxFile(fileName, wxFile::read);
   : wxInputStream()
 {
     m_file = new wxFile(fileName, wxFile::read);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;
+    if ( !m_file->IsOpened() )
+        m_lasterror = wxSTREAM_READ_ERROR;

 }
 
 wxFileInputStream::wxFileInputStream()
   : wxInputStream()
 {
 }
 
 wxFileInputStream::wxFileInputStream()
   : wxInputStream()
 {

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

     m_file = NULL;
 }
 
 wxFileInputStream::wxFileInputStream(wxFile& file)
 {
     m_file = &file;
     m_file = NULL;
 }
 
 wxFileInputStream::wxFileInputStream(wxFile& file)
 {
     m_file = &file;

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

 }
 
 wxFileInputStream::wxFileInputStream(int fd)
 {
     m_file = new wxFile(fd);
 }
 
 wxFileInputStream::wxFileInputStream(int fd)
 {
     m_file = new wxFile(fd);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;

 }
 
 wxFileInputStream::~wxFileInputStream()
 }
 
 wxFileInputStream::~wxFileInputStream()


@@ -62,17 +65,17 @@ wxFileInputStream::~wxFileInputStream()
         delete m_file;
 }
 
         delete m_file;
 }
 

-size_t wxFileInputStream::GetSize() const
+wxFileOffset wxFileInputStream::GetLength() const

 {
     return m_file->Length();
 }
 
 size_t wxFileInputStream::OnSysRead(void *buffer, size_t size)
 {
 {
     return m_file->Length();
 }
 
 size_t wxFileInputStream::OnSysRead(void *buffer, size_t size)
 {

-    off_t ret = m_file->Read(buffer, size);
+    ssize_t ret = m_file->Read(buffer, size);

 
     // NB: we can't use a switch here because HP-UX CC doesn't allow
 
     // NB: we can't use a switch here because HP-UX CC doesn't allow

-    //     switching over long long (which off_t is in 64bit mode)
+    //     switching over long long (which size_t is in 64bit mode)

 
     if ( !ret )
     {
 
     if ( !ret )
     {


@@ -93,16 +96,21 @@ size_t wxFileInputStream::OnSysRead(void *buffer, size_t size)
     return ret;
 }
 
     return ret;
 }
 

-off_t wxFileInputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)

 {
     return m_file->Seek(pos, mode);
 }
 
 {
     return m_file->Seek(pos, mode);
 }
 

-off_t wxFileInputStream::OnSysTell() const
+wxFileOffset wxFileInputStream::OnSysTell() const

 {
     return m_file->Tell();
 }
 
 {
     return m_file->Tell();
 }
 

+bool wxFileInputStream::IsOk() const
+{
+    return wxInputStream::IsOk() && m_file->IsOpened();
+}
+

 // ----------------------------------------------------------------------------
 // wxFileOutputStream
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxFileOutputStream
 // ----------------------------------------------------------------------------


@@ -110,36 +118,29 @@ off_t wxFileInputStream::OnSysTell() const
 wxFileOutputStream::wxFileOutputStream(const wxString& fileName)
 {
     m_file = new wxFile(fileName, wxFile::write);
 wxFileOutputStream::wxFileOutputStream(const wxString& fileName)
 {
     m_file = new wxFile(fileName, wxFile::write);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;

 
     if (!m_file->IsOpened())
 
     if (!m_file->IsOpened())

-    {

         m_lasterror = wxSTREAM_WRITE_ERROR;
         m_lasterror = wxSTREAM_WRITE_ERROR;

-    }
-    else
-    {
-        if (m_file->Error())
-            m_lasterror = wxSTREAM_WRITE_ERROR;
-    }

 }
 
 wxFileOutputStream::wxFileOutputStream(wxFile& file)
 {
     m_file = &file;
 }
 
 wxFileOutputStream::wxFileOutputStream(wxFile& file)
 {
     m_file = &file;

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

 }
 
 wxFileOutputStream::wxFileOutputStream()
                   : wxOutputStream()
 {
 }
 
 wxFileOutputStream::wxFileOutputStream()
                   : wxOutputStream()
 {

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

     m_file = NULL;
 }
 
 wxFileOutputStream::wxFileOutputStream(int fd)
 {
     m_file = new wxFile(fd);
     m_file = NULL;
 }
 
 wxFileOutputStream::wxFileOutputStream(int fd)
 {
     m_file = new wxFile(fd);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;

 }
 
 wxFileOutputStream::~wxFileOutputStream()
 }
 
 wxFileOutputStream::~wxFileOutputStream()


@@ -160,12 +161,12 @@ size_t wxFileOutputStream::OnSysWrite(const void *buffer, size_t size)
     return ret;
 }
 
     return ret;
 }
 

-off_t wxFileOutputStream::OnSysTell() const
+wxFileOffset wxFileOutputStream::OnSysTell() const

 {
     return m_file->Tell();
 }
 
 {
     return m_file->Tell();
 }
 

-off_t wxFileOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)

 {
     return m_file->Seek(pos, mode);
 }
 {
     return m_file->Seek(pos, mode);
 }


@@ -176,49 +177,101 @@ void wxFileOutputStream::Sync()
     m_file->Flush();
 }
 
     m_file->Flush();
 }
 

-size_t wxFileOutputStream::GetSize() const
+wxFileOffset wxFileOutputStream::GetLength() const

 {
     return m_file->Length();
 }
 
 {
     return m_file->Length();
 }
 

+bool wxFileOutputStream::IsOk() const
+{
+    return wxOutputStream::IsOk() && m_file->IsOpened();
+}
+
+// ----------------------------------------------------------------------------
+// wxTempFileOutputStream
+// ----------------------------------------------------------------------------
+
+wxTempFileOutputStream::wxTempFileOutputStream(const wxString& fileName)
+{
+    m_file = new wxTempFile(fileName);
+
+    if (!m_file->IsOpened())
+        m_lasterror = wxSTREAM_WRITE_ERROR;
+}
+
+wxTempFileOutputStream::~wxTempFileOutputStream()
+{
+    if (m_file->IsOpened())
+        Discard();
+    delete m_file;
+}
+
+size_t wxTempFileOutputStream::OnSysWrite(const void *buffer, size_t size)
+{
+    if (IsOk() && m_file->Write(buffer, size))
+        return size;
+    m_lasterror = wxSTREAM_WRITE_ERROR;
+    return 0;
+}
+

 // ----------------------------------------------------------------------------
 // wxFileStream
 // ----------------------------------------------------------------------------
 
 wxFileStream::wxFileStream(const wxString& fileName)
 // ----------------------------------------------------------------------------
 // wxFileStream
 // ----------------------------------------------------------------------------
 
 wxFileStream::wxFileStream(const wxString& fileName)

-            : wxFileInputStream(fileName)
+            : wxFileInputStream(),
+              wxFileOutputStream()

 {
 {

-    wxFileOutputStream::m_file = wxFileInputStream::m_file;
+    wxFileOutputStream::m_file =
+    wxFileInputStream::m_file = new wxFile(fileName, wxFile::read_write);
+
+    // this is a bit ugly as streams are symmetric but we still have to delete
+    // the file we created above exactly once so we decide to (arbitrarily) do
+    // it in wxFileInputStream
+    wxFileInputStream::m_file_destroy = true;

 }
 
 }
 

+bool wxFileStream::IsOk() const
+{
+    return wxFileOutputStream::IsOk() && wxFileInputStream::IsOk();
+}
+
+#endif // wxUSE_FILE
+
+#if wxUSE_FFILE
+

 // ----------------------------------------------------------------------------
 // wxFFileInputStream
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxFFileInputStream
 // ----------------------------------------------------------------------------
 

-wxFFileInputStream::wxFFileInputStream(const wxString& fileName)
-  : wxInputStream()
+wxFFileInputStream::wxFFileInputStream(const wxString& fileName,
+                                       const wxString& mode)
+                  : wxInputStream()

 {
 {

-    m_file = new wxFFile(fileName, _T("rb"));
-    m_file_destroy = TRUE;
+    m_file = new wxFFile(fileName, mode);
+    m_file_destroy = true;
+
+    if (!m_file->IsOpened())
+        m_lasterror = wxSTREAM_WRITE_ERROR;

 }
 
 wxFFileInputStream::wxFFileInputStream()
 }
 
 wxFFileInputStream::wxFFileInputStream()

-  : wxInputStream()
+                  : wxInputStream()

 {
 {

-    m_file_destroy = FALSE;

     m_file = NULL;
     m_file = NULL;

+    m_file_destroy = false;

 }
 
 wxFFileInputStream::wxFFileInputStream(wxFFile& file)
 {
     m_file = &file;
 }
 
 wxFFileInputStream::wxFFileInputStream(wxFFile& file)
 {
     m_file = &file;

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

 }
 
 wxFFileInputStream::wxFFileInputStream(FILE *file)
 {
     m_file = new wxFFile(file);
 }
 
 wxFFileInputStream::wxFFileInputStream(FILE *file)
 {
     m_file = new wxFFile(file);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;

 }
 
 wxFFileInputStream::~wxFFileInputStream()
 }
 
 wxFFileInputStream::~wxFFileInputStream()


@@ -227,18 +280,17 @@ wxFFileInputStream::~wxFFileInputStream()
         delete m_file;
 }
 
         delete m_file;
 }
 

-size_t wxFFileInputStream::GetSize() const
+wxFileOffset wxFFileInputStream::GetLength() const

 {
     return m_file->Length();
 }
 
 size_t wxFFileInputStream::OnSysRead(void *buffer, size_t size)
 {
 {
     return m_file->Length();
 }
 
 size_t wxFFileInputStream::OnSysRead(void *buffer, size_t size)
 {

-    off_t ret;
+    ssize_t ret = m_file->Read(buffer, size);

 
 

-    ret = m_file->Read(buffer, size);
-
-    if (m_file->Eof())
+    // It is not safe to call Eof() if the file is not opened.
+    if (!m_file->IsOpened() || m_file->Eof())

         m_lasterror = wxSTREAM_EOF;
     if (ret == wxInvalidOffset)
     {
         m_lasterror = wxSTREAM_EOF;
     if (ret == wxInvalidOffset)
     {


@@ -249,24 +301,30 @@ size_t wxFFileInputStream::OnSysRead(void *buffer, size_t size)
     return ret;
 }
 
     return ret;
 }
 

-off_t wxFFileInputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxFFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)

 {
 {

-    return ( m_file->Seek(pos, mode) ? pos : wxInvalidOffset );
+    return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset;

 }
 
 }
 

-off_t wxFFileInputStream::OnSysTell() const
+wxFileOffset wxFFileInputStream::OnSysTell() const

 {
     return m_file->Tell();
 }
 
 {
     return m_file->Tell();
 }
 

+bool wxFFileInputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
+}
+

 // ----------------------------------------------------------------------------
 // wxFFileOutputStream
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxFFileOutputStream
 // ----------------------------------------------------------------------------
 

-wxFFileOutputStream::wxFFileOutputStream(const wxString& fileName)
+wxFFileOutputStream::wxFFileOutputStream(const wxString& fileName,
+                                         const wxString& mode)

 {
 {

-    m_file = new wxFFile(fileName, _T("w+b"));
-    m_file_destroy = TRUE;
+    m_file = new wxFFile(fileName, mode);
+    m_file_destroy = true;

 
     if (!m_file->IsOpened())
     {
 
     if (!m_file->IsOpened())
     {


@@ -282,20 +340,20 @@ wxFFileOutputStream::wxFFileOutputStream(const wxString& fileName)
 wxFFileOutputStream::wxFFileOutputStream(wxFFile& file)
 {
     m_file = &file;
 wxFFileOutputStream::wxFFileOutputStream(wxFFile& file)
 {
     m_file = &file;

-    m_file_destroy = FALSE;
+    m_file_destroy = false;

 }
 
 wxFFileOutputStream::wxFFileOutputStream()
 }
 
 wxFFileOutputStream::wxFFileOutputStream()

-  : wxOutputStream()
+                   : wxOutputStream()

 {
 {

-    m_file_destroy = FALSE;

     m_file = NULL;
     m_file = NULL;

+    m_file_destroy = false;

 }
 
 wxFFileOutputStream::wxFFileOutputStream(FILE *file)
 {
     m_file = new wxFFile(file);
 }
 
 wxFFileOutputStream::wxFFileOutputStream(FILE *file)
 {
     m_file = new wxFFile(file);

-    m_file_destroy = TRUE;
+    m_file_destroy = true;

 }
 
 wxFFileOutputStream::~wxFFileOutputStream()
 }
 
 wxFFileOutputStream::~wxFFileOutputStream()


@@ -310,21 +368,22 @@ wxFFileOutputStream::~wxFFileOutputStream()
 size_t wxFFileOutputStream::OnSysWrite(const void *buffer, size_t size)
 {
     size_t ret = m_file->Write(buffer, size);
 size_t wxFFileOutputStream::OnSysWrite(const void *buffer, size_t size)
 {
     size_t ret = m_file->Write(buffer, size);

-    if (m_file->Error())
+    // It is not safe to call Error() if the file is not opened.
+    if (!m_file->IsOpened() || m_file->Error())

         m_lasterror = wxSTREAM_WRITE_ERROR;
     else
         m_lasterror = wxSTREAM_NO_ERROR;
     return ret;
 }
 
         m_lasterror = wxSTREAM_WRITE_ERROR;
     else
         m_lasterror = wxSTREAM_NO_ERROR;
     return ret;
 }
 

-off_t wxFFileOutputStream::OnSysTell() const
+wxFileOffset wxFFileOutputStream::OnSysTell() const

 {
     return m_file->Tell();
 }
 
 {
     return m_file->Tell();
 }
 

-off_t wxFFileOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxFFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)

 {
 {

-    return ( m_file->Seek(pos, mode) ? pos : wxInvalidOffset );
+    return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset;

 }
 
 void wxFFileOutputStream::Sync()
 }
 
 void wxFFileOutputStream::Sync()


@@ -333,21 +392,39 @@ void wxFFileOutputStream::Sync()
     m_file->Flush();
 }
 
     m_file->Flush();
 }
 

-size_t wxFFileOutputStream::GetSize() const
+wxFileOffset wxFFileOutputStream::GetLength() const

 {
     return m_file->Length();
 }
 
 {
     return m_file->Length();
 }
 

+bool wxFFileOutputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
+}
+

 // ----------------------------------------------------------------------------
 // wxFFileStream
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxFFileStream
 // ----------------------------------------------------------------------------
 

-wxFFileStream::wxFFileStream(const wxString& fileName)
-             : wxFFileInputStream(fileName)
+wxFFileStream::wxFFileStream(const wxString& fileName, const wxString& mode)
+             : wxFFileInputStream(),
+               wxFFileOutputStream()

 {
 {

-    wxFFileOutputStream::m_file = wxFFileInputStream::m_file;
+    wxASSERT_MSG( mode.find_first_of('+') != wxString::npos,
+                  "must be opened in read-write mode for this class to work" );
+
+    wxFFileOutputStream::m_file =
+    wxFFileInputStream::m_file = new wxFFile(fileName, mode);
+
+    // see comment in wxFileStream ctor
+    wxFFileInputStream::m_file_destroy = true;

 }
 
 }
 

-#endif
-  // wxUSE_STREAMS && wxUSE_FILE
+bool wxFFileStream::IsOk() const
+{
+    return wxFFileOutputStream::IsOk() && wxFFileInputStream::IsOk();
+}
+
+#endif //wxUSE_FFILE

 
 

+#endif // wxUSE_STREAMS