better fix for infinite loop in HandleOnNavigationKey() when wxUSE_STL==1 and start_n...

[wxWidgets.git] / src / html / htmltag.cpp

diff --git a/src/html/htmltag.cpp b/src/html/htmltag.cpp
index 361aaa971a6df60fb0091481d9d18f0ec391a51e..98a1ff4fba8b485f36ac821d0a03407d9dec0a76 100644 (file)
--- a/src/html/htmltag.cpp
+++ b/src/html/htmltag.cpp
@@ -4,14 +4,9 @@
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik
-// Licence:     wxWindows Licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "htmltag.h"
-#endif
-
 #include "wx/wxprec.h"
 
 #include "wx/defs.h"
@@ -90,7 +85,7 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
                   src[pos] != wxT('>') && !wxIsspace(src[pos]);
                   i++, pos++ )
             {
-                tagBuffer[i] = wxToupper(src[pos]);
+                tagBuffer[i] = (wxChar)wxToupper(src[pos]);
             }
             tagBuffer[i] = _T('\0');
 
@@ -117,6 +112,11 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
 
                 if (wxIsCDATAElement(tagBuffer))
                 {
+                    // store the orig pos in case we are missing the closing
+                    // tag (see below)
+                    wxInt32 old_pos = pos;
+                    bool foundCloseTag = false;
+
                     // find next matching tag
                     int tag_len = wxStrlen(tagBuffer);
                     while (pos < lng)
@@ -127,7 +127,7 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
                             ++pos;
                         if (src[pos] == '<')
                             ++pos;
-                        
+
                         // see if it matches
                         int match_pos = 0;
                         while (pos < lng && match_pos < tag_len && src[pos] != '>' && src[pos] != '<') {
@@ -135,7 +135,7 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
                             // Unicode build
                             if ((wxChar)wxToupper(src[pos]) == tagBuffer[match_pos]) {
                                 ++match_pos;
-                            }  
+                            }
                             else if (src[pos] == wxT(' ') || src[pos] == wxT('\n') ||
                                 src[pos] == wxT('\r') || src[pos] == wxT('\t')) {
                                 // need to skip over these
@@ -147,16 +147,25 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
                         }
 
                         // found a match
-                        if (match_pos == tag_len) {
-                            // These 2 lines commented:
-                            //pos = pos - tag_len - 3; pos is not used outside of while loop
-                            //stpos = pos; Value is local to while loop, no need to set it
+                        if (match_pos == tag_len)
+                        {
+                            pos = pos - tag_len - 3;
+                            foundCloseTag = true;
                             break;
                         }
-                        else {
+                        else // keep looking for the closing tag
+                        {
                             ++pos;
                         }
                     }
+                    if (!foundCloseTag)
+                    {
+                        // we didn't find closing tag; this means the markup
+                        // is incorrect and the best thing we can do is to
+                        // ignore the unclosed tag and continue parsing as if
+                        // it didn't exist:
+                        pos = old_pos;
+                    }
                 }
             }
         }
@@ -180,6 +189,16 @@ void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
         int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
         do
         {
+            if ( m_CachePos < 0 || m_CachePos == m_CacheSize )
+            {
+                // something is very wrong with HTML, give up by returning an
+                // impossibly large value which is going to be ignored by the
+                // caller
+                *end1 =
+                *end2 = INT_MAX;
+                return;
+            }
+
             m_CachePos += delta;
         }
         while (m_Cache[m_CachePos].Key != at);
@@ -341,12 +360,12 @@ wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
         }
 
         #undef IS_WHITE
-   }
-   m_Begin = i;
+    }
+    m_Begin = i;
 
-   cache->QueryTag(pos, &m_End1, &m_End2);
-   if (m_End1 > end_pos) m_End1 = end_pos;
-   if (m_End2 > end_pos) m_End2 = end_pos;
+    cache->QueryTag(pos, &m_End1, &m_End2);
+    if (m_End1 > end_pos) m_End1 = end_pos;
+    if (m_End2 > end_pos) m_End2 = end_pos;
 }
 
 wxHtmlTag::~wxHtmlTag()
@@ -394,7 +413,7 @@ bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
 {
     wxString str = GetParam(par);
 
-    if (str.IsEmpty()) return false;
+    if (str.empty()) return false;
     if (str.GetChar(0) == wxT('#'))
     {
         unsigned long tmp;
@@ -444,7 +463,7 @@ bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const
 
 wxString wxHtmlTag::GetAllParams() const
 {
-    // VS: this function is for backward compatiblity only,
+    // VS: this function is for backward compatibility only,
     //     never used by wxHTML
     wxString s;
     size_t cnt = m_ParamNames.GetCount();