From: Václav Slavík <vslavik@fastmail.fm>
Date: Sat, 11 Mar 2000 19:31:19 +0000 (+0000)
Subject: some != NULL checks
X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/f5ba273ecd799f652736ce2bc830283787302a56

some != NULL checks


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6627 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---

diff --git a/src/html/helpfrm.cpp b/src/html/helpfrm.cpp
index a2cc0a9803..b36d1c62e6 100644
--- a/src/html/helpfrm.cpp
+++ b/src/html/helpfrm.cpp
@@ -92,6 +92,7 @@ class wxHtmlHelpHashData : public wxObject
     public:
         wxHtmlHelpHashData(int index, wxTreeItemId id) : wxObject()
             { m_Index = index; m_Id = id;}
+        ~wxHtmlHelpHashData() {}
         
         int m_Index;
         wxTreeItemId m_Id;
@@ -1147,7 +1148,10 @@ void wxHtmlHelpFrame::OnToolbar(wxCommandEvent& event)
             {
                 if (m_Printer == NULL) 
                     m_Printer = new wxHtmlEasyPrinting(_("Help Printing"), this);
-                m_Printer -> PrintFile(m_HtmlWin -> GetOpenedPage());
+                if (!m_HtmlWin -> GetOpenedPage())
+                    wxLogWarning(_("Cannot print empty page."));
+                else
+                    m_Printer -> PrintFile(m_HtmlWin -> GetOpenedPage());
             }
             break;
 #endif
diff --git a/src/html/htmprint.cpp b/src/html/htmprint.cpp
index e552d63d80..ed299f645d 100644
--- a/src/html/htmprint.cpp
+++ b/src/html/htmprint.cpp
@@ -266,6 +266,13 @@ void wxHtmlPrintout::SetHtmlFile(const wxString& htmlfile)
 {
     wxFileSystem fs;
     wxFSFile *ff = fs.OpenFile(htmlfile);
+    
+    if (ff == NULL)
+    {   
+        wxLogError(htmlfile + _(": file does not exist!"));
+        return;
+    }
+    
     wxInputStream *st = ff -> GetStream();
     char *t = new char[st -> GetSize() + 1];
     st -> Read(t, st -> GetSize());